First Horizon (FHN) 10-K 28 Feb 20 2019 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Jan. 31, 2020	Jun. 30, 2019
Entity Information [Line Items]
Entity Incorporation, State or Country Code	TN
Entity Registrant Name	FIRST HORIZON NATIONAL CORPORATION
Entity Central Index Key	0000036966
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		311,602,613
Document Transition Report	false
Document Annual Report	true
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Tax Identification Number	62-0803242
Entity Address, Address Line One	165 Madison Avenue
Entity Address, City or Town	Memphis,
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	38103
City Area Code	901
Local Phone Number	523-4444
Entity File Number	001-15185
Entity Public Float			$ 4.6
Documents Incorporated by Reference	Portions of the Proxy Statement to be furnished to shareholders in connection with Annual Meeting of shareholders scheduled for April 28, 2020: Part III of this Report
Common Class A
Entity Information [Line Items]
Title of 12(b) Security	$.625 Par Value Common Capital Stock
Security Exchange Name	NYSE
Trading Symbol	FHN
Series A Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/4,000th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series A
Security Exchange Name	NYSE
Trading Symbol	FHN PR A

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Assets:
Cash and due from banks		$ 633,728	$ 781,291
Federal funds sold		46,536	237,591
Securities purchased under agreements to resell (Note 23)		586,629	386,443
Total cash and cash equivalents		1,266,893	1,405,325
Interest-bearing cash		482,405	1,277,611
Trading securities		1,346,207	1,448,168
Loans held-for-sale	[1]	593,790	679,149
Securities available-for-sale (Note 3)		4,445,403	4,626,470
Securities held-to-maturity (Note 3)		10,000	10,000
Loans, net of unearned income	[2]	31,061,111	27,535,532
Less: Allowance for loan losses		200,307	180,424
Total net loans		30,860,804	27,355,108
Goodwill (Note 7)		1,432,787	1,432,787
Other intangible assets, net (Note 7)		130,200	155,034
Fixed income receivables		40,114	38,861
Premises and equipment, net (December 31, 2019 and 2018 include $9.7 million and $19.6 million, respectively, classified as held-for-sale) (Note 6)		455,006	494,041
Other real estate owned (OREO)	[3]	17,838	25,290
Derivative assets (Note 22)		183,115	81,475
Other assets		2,046,338	1,802,939
Total assets		43,310,900	40,832,258
Deposits:
Savings		11,664,906	12,064,072
Time deposits, net		3,618,337	4,105,777
Other interest-bearing deposits		8,717,341	8,371,826
Interest-bearing		24,000,584	24,541,675
Noninterest-bearing		8,428,951	8,141,317
Total deposits		32,429,535	32,682,992
Federal funds purchased (Note 9)		548,344	256,567
Securities sold under agreements to repurchase (Note 9 and Note 23)		716,925	762,592
Trading liabilities (Note 9)		505,581	335,380
Other short-term borrowings (Note 9)		2,253,045	114,764
Term borrowings (Note 10)		791,368	1,170,963
Fixed income payables		49,535	9,572
Derivative liabilities (Note 22)		67,480	133,713
Other liabilities		873,079	580,335
Total liabilities		38,234,892	36,046,878
First Horizon National Corporation Shareholders’ Equity:
Preferred stock - Series A, non-cumulative perpetual, no par value, liquidation preference of $100,000 per share - (shares authorized - 1,000; shares issued - 1,000 on December 31, 2019 and 2018) (Note 11)		95,624	95,624
Common stock - $.625 par value (shares authorized - 400,000,000; shares issued - 311,469,056 on December 31, 2019 and 318,573,400 on December 31, 2018)		194,668	199,108
Capital surplus		2,931,451	3,029,425
Undivided profits		1,798,442	1,542,408
Accumulated other comprehensive loss, net (Note 14)		(239,608)	(376,616)
Total First Horizon National Corporation Shareholders’ Equity		4,780,577	4,489,949
Noncontrolling interest (Note 11)		295,431	295,431
Total equity		5,076,008	4,785,380
Total liabilities and equity		$ 43,310,900	$ 40,832,258
[1]	December 31, 2019 and 2018 include $6.8 million and $8.4 million , respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.
[2]	December 31, 2019 and 2018 include $18.8 million and $28.6 million
[3]	December 31, 2019 and 2018 include $9.2 million and $9.7 million , respectively, of foreclosed residential real estate.

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Premises and equipment held for sale		$ 9,700	$ 19,600
Liquidation preference per share (in dollars per share)		$ 100,000	$ 100,000
Preferred stock, shares authorized (in shares)		1,000	1,000
Preferred stock, shares issued (in shares)		1,000	1,000
Common stock, par value (in dollars per share)		$ 0.625	$ 0.625
Common stock, shares authorized (in shares)		400,000,000	400,000,000
Common stock, shares issued (in shares)		311,469,056	318,573,400
Residential real estate foreclosure	[1]	$ 17,838	$ 25,290
Residential Real Estate
Held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure		18,800	28,600
Residential real estate foreclosure		9,200	9,700
Loans Held For Sale, Residential Real Estate | Residential Real Estate
Held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure		$ 6,800	$ 8,400
[1]	December 31, 2019 and 2018 include $9.2 million and $9.7 million , respectively, of foreclosed residential real estate.

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income:
Interest and fees on loans	$ 1,394,442	$ 1,286,470	$ 816,806
Interest on investment securities available-for-sale	120,558	130,376	105,019
Interest on investment securities held-to-maturity	525	525	591
Interest on loans held-for-sale	31,127	45,108	17,517
Interest on trading securities	46,576	58,684	34,991
Interest on other earning assets	31,112	24,858	15,006
Total interest income	1,624,340	1,546,021	989,930
Interest on deposits:
Savings	144,350	107,748	42,519
Time deposits	84,027	53,096	13,111
Other interest-bearing deposits	78,839	55,707	24,481
Interest on trading liabilities	12,502	19,359	15,468
Interest on short-term borrowings	41,172	36,747	16,000
Interest on term borrowings	53,263	53,047	36,037
Total interest expense	414,153	325,704	147,616
Net interest income	1,210,187	1,220,317	842,314
Provision/(provision credit) for loan losses	47,000	7,000	0
Net interest income after provision/(provision credit) for loan losses	1,163,187	1,213,317	842,314
Noninterest income:
Fixed income	278,789	167,882	216,625
Deposit transactions and cash management	131,663	133,281	110,592
Brokerage, management fees and commissions	55,467	54,803	48,514
Trust services and investment management	29,511	29,806	28,420
Bankcard income	28,308	29,304	26,435
Bank-owned life insurance (BOLI)	19,210	18,955	15,124
Debt securities gains/(losses), net (Note 3 and Note 14)	(267)	52	483
Equity securities gains/(losses), net (Note 3)	441	212,896	109
All other income and commissions (Note 13)	110,958	75,809	43,917
Total noninterest income	654,080	722,788	490,219
Adjusted gross income after provision/(provision credit) for loan losses	1,817,267	1,936,105	1,332,533
Noninterest expense:
Employee compensation, incentives, and benefits	695,351	658,223	587,465
Occupancy	80,271	85,009	54,646
Computer software	60,721	60,604	48,234
Professional fees	55,218	45,799	47,929
Operations services	46,006	56,280	43,823
Advertising and public relations	34,359	24,752	19,214
Equipment rentals, depreciation, and maintenance	33,998	39,132	29,543
Communications and courier	25,080	30,032	17,624
Amortization of intangible assets	24,834	25,855	8,728
FDIC premium expense	19,890	31,642	26,818
Legal fees	16,880	11,149	12,076
Contract employment and outsourcing	12,865	18,522	14,954
All other expense (Note 13)	126,130	134,997	112,607
Total noninterest expense	1,231,603	1,221,996	1,023,661
Income/(loss) before income taxes	585,664	714,109	308,872
Provision/(benefit) for income taxes (Note 15)	133,291	157,602	131,892
Net income/(loss)	452,373	556,507	176,980
Net income attributable to noncontrolling interest	11,465	11,465	11,465
Net income/(loss) attributable to controlling interest	440,908	545,042	165,515
Preferred stock dividends	6,200	6,200	6,200
Net income/(loss) available to common shareholders	$ 434,708	$ 538,842	$ 159,315
Basic earnings/(loss) per share (Note 16) (in dollars per share)	$ 1.39	$ 1.66	$ 0.66
Diluted earnings/(loss) per share (Note 16) (in dollars per share)	$ 1.38	$ 1.65	$ 0.65
Weighted average common shares (in shares)	313,637	324,375	241,436
Diluted average common shares (in shares)	315,657	327,445	244,453
Cash dividends declared per common share (in dollars per share)	$ 0.56	$ 0.48	$ 0.36

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statements of Comprehensive Income/(loss)
Net income/(loss)	$ 452,373	$ 556,507	$ 176,980
Other comprehensive income/(loss), net of tax:
Net unrealized gains/(losses) on securities available-for-sale	106,815	(48,897)	(4,765)
Net unrealized gains/(losses) on cash flow hedges	15,339	(4,142)
Net unrealized gains/(losses) on cash flow hedges			(5,101)
Net unrealized gains/(losses) on pension and other postretirement plans	14,854	(541)	(7,759)
Other comprehensive income/(loss)	137,008	(53,580)	(17,625)
Comprehensive income/(loss)	589,381	502,927	159,355
Comprehensive income attributable to noncontrolling interest	11,465	11,465	11,465
Comprehensive income attributable to controlling interest	577,916	491,462	147,890
Income tax expense/(benefit) of items included in Other comprehensive income:
Net unrealized gains/(losses) on securities available-for-sale	35,062	(16,054)	(2,955)
Net unrealized gains/(losses) on cash flow hedges	5,035	(1,360)	(3,163)
Net unrealized gains/(losses) on cash flow hedges			(3,163)
Net unrealized gains/(losses) on pension and other postretirement plans	$ 4,876	$ (177)	$ (832)

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands		Total		Common Stock	Preferred Stock	Capital Surplus	Undivided Profits	Accumulated Other Comprehensive Income/(Loss)	[1]	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-09						$ 230	$ (230)
Balance as adjusted		$ 2,705,084		$ 146,015	$ 95,624	1,386,866	1,028,802	$ (247,654)		$ 295,431
Beginning balance (in shares) at Dec. 31, 2016				233,624
Beginning balance at Dec. 31, 2016		2,705,084		$ 146,015	95,624	1,386,636	1,029,032	(247,654)		295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		176,980					165,515			11,465
Other comprehensive income/(loss)		(17,625)						(17,625)
Comprehensive income/(loss)		159,355					165,515	(17,625)		11,465
Cash dividends declared:
Preferred stock		(6,200)					(6,200)
Common stock		(85,174)	[2]				(85,174)
Common stock repurchased (in shares)				(297)
Common stock repurchased		(5,554)		$ (185)		(5,369)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				1,107
Stock options and restricted stock - equity awards		6,092		$ 692		5,400
Equity issued for acquisitions (in shares)				92,302
Equity issued for acquisitions		1,797,723		$ 57,689		1,740,034
Stock-based compensation expense		20,627				20,627
Dividends declared - noncontrolling interest of subsidiary preferred stock		(11,465)								(11,465)
Other						55	(55)
Ending balance (in shares) at Dec. 31, 2017				326,736
Ending balance at Dec. 31, 2017		4,580,488		$ 204,211	95,624	3,147,613	1,102,888	(265,279)		295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2018-02							57,546	(57,546)
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-01 and 2017-12		67					278	(211)
Balance, as adjusted for ASU 2018-02		4,580,488		204,211	95,624	3,147,613	1,160,434	(322,825)		295,431
Balance as adjusted		4,580,555		$ 204,211	95,624	3,147,613	1,160,712	(323,036)		295,431
Net income/(loss)		556,507					545,042			11,465
Other comprehensive income/(loss)		(53,580)						(53,580)
Comprehensive income/(loss)		502,927					545,042	(53,580)		11,465
Cash dividends declared:
Preferred stock		(6,200)					(6,200)
Common stock		(157,146)					(157,146)
Common stock repurchased (in shares)	[2]			(6,708)
Common stock repurchased	[2]	(104,768)		$ (4,192)		(100,576)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				926
Stock options and restricted stock - equity awards		4,480		$ 578		3,902
Equity issued for acquisitions (in shares)	[3]			(2,374)
Equity issued for acquisitions	[3]	(46,041)		$ (1,484)		(44,557)
Stock-based compensation expense		23,171				23,171
Dividends declared - noncontrolling interest of subsidiary preferred stock		(11,465)								(11,465)
Other (in shares)				(7)
Other		(133)		$ (5)		(128)
Ending balance (in shares) at Dec. 31, 2018				318,573
Ending balance at Dec. 31, 2018		4,785,380		$ 199,108	95,624	3,029,425	1,542,408	(376,616)		295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-02		(1,011)					(1,011)
Balance as adjusted		4,784,369		$ 199,108	95,624	3,029,425	1,541,397	(376,616)		295,431
Net income/(loss)		452,373					440,908			11,465
Other comprehensive income/(loss)		137,008						137,008
Comprehensive income/(loss)		589,381					440,908	137,008		11,465
Cash dividends declared:
Preferred stock		(6,200)					(6,200)
Common stock		(177,663)					(177,663)
Common stock repurchased (in shares)	[2]			(9,100)
Common stock repurchased	[2]	(134,813)		$ (5,687)		(129,126)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				1,996
Stock options and restricted stock - equity awards		9,669		$ 1,247		8,422
Stock-based compensation expense		22,730				22,730
Dividends declared - noncontrolling interest of subsidiary preferred stock		(11,465)								(11,465)
Ending balance (in shares) at Dec. 31, 2019				311,469
Ending balance at Dec. 31, 2019		$ 5,076,008		$ 194,668	$ 95,624	$ 2,931,451	$ 1,798,442	$ (239,608)		$ 295,431
[1]	Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of Other comprehensive income/(loss) have been attributed solely to FHN as the controlling interest holder.
[2]	2019 and 2018 include $129.9 million and $99.4 million , respectively, repurchased under share repurchase programs.
[3]	See Note 2- Acquisitions and Divestitures for additional information.

CONSOLIDATED STATEMENTS OF EQ_2

CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common stock - cash dividends declared per share (in dollars per share)	$ 0.56	$ 0.48	$ 0.36
Preferred stock - cash dividends declared per share (in dollars per share)	$ 6,200	$ 6,200	$ 6,200
First Horizon Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased under share repurchase programs	$ 129.9	$ 99.4

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities
Net income/(loss)		$ 452,373	$ 556,507	$ 176,980
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities:
Provision/(provision credit) for loan losses		47,000	7,000	0
Provision/(benefit) for deferred income taxes		14,357	103,557	121,001
Depreciation and amortization of premises and equipment		43,785	47,232	34,703
Amortization of intangible assets		24,834	25,855	8,728
Net other amortization and accretion		(3,380)	(13,962)	27,493
Net (increase)/decrease in derivatives		(134,009)	41,687	(26,662)
Fair value adjustment on interest-only strips		4,725	398	(1,021)
Repurchase and foreclosure provision/(provision credit)		0	0	(20,000)
(Gains)/losses and write-downs on OREO, net		624	(626)	(61)
Litigation and regulatory matters		(8,443)	(836)	40,250
Stock-based compensation expense		22,730	23,171	20,627
Gain on sale and pay down of held-to-maturity loans		(1,105)	(3,777)	0
Equity securities (gains)/losses, net		(441)	(212,896)	(109)
Debt securities (gains)/losses, net		267	(52)	(483)
(Gain)/loss on extinguishment of debt		(58)	15	14,329
Net (gains)/losses on sale/disposal of fixed assets		22,172	(1,320)	6,657
Qualified pension plan contributions		(509)	(353)	(5,100)
(Gain)/loss on BOLI		(4,978)	(4,217)	(9,012)
Loans held-for-sale:
Purchases and originations		(2,075,042)	(2,345,030)	(2,001,708)
Gross proceeds from settlements and sales		817,863	919,187	1,780,047
(Gain)/loss due to fair value adjustments and other	[1]	(7,196)	19,932	(6,624)
Net (increase)/decrease in:
Trading securities		1,422,617	1,356,797	(381,057)
Fixed income receivables		(1,253)	29,832	(11,282)
Interest receivable		4,546	(15,372)	(34,352)
Other assets		(116,888)	32,950	240,629
Net increase/(decrease) in:
Trading liabilities		170,201	(303,135)	76,667
Fixed income payables		39,963	(39,424)	(68,495)
Interest payable		339	15,165	5,934
Other liabilities		95,200	(3,980)	(16,877)
Total adjustments		377,921	(322,202)	(205,778)
Net cash provided/(used) by operating activities		830,294	234,305	(28,798)
Available-for-sale securities:
Sales		191,681	20,751
Sales				936,958
Maturities		800,147	675,526	583,014
Purchases		(629,649)	(473,205)
Purchases				(1,558,990)
Proceeds from sale of equity investment		1,440	0	0
Held-to-maturity securities:
Prepayments and maturities		0	0	4,740
Premises and equipment:
Sales		20,058	30,464	3,416
Purchases		(49,159)	(47,986)	(53,046)
Proceeds from sale of Visa Class B shares		0	240,206	0
Proceeds from sales of OREO		15,824	30,824	13,468
Proceeds from sales and pay down of loans classified as held-to-maturity		20,100	50,498	0
Proceeds from BOLI		14,407	12,860	11,440
Net (increase)/decrease in:
Loans		(3,570,386)	105,267	(808,399)
Interests retained from securitizations classified as trading securities		489	800	865
Interest-bearing cash		795,206	(92,011)	(121,434)
Cash paid related to divestitures		0	(27,599)	0
Cash (paid)/received for acquisitions, net		0	(46,023)	(336,634)
Net cash provided/(used) by investing activities		(2,389,842)	480,372	(1,324,602)
Common stock:
Stock options exercised		9,665	4,482	6,132
Cash dividends paid		(171,076)	(138,706)	(79,904)
Repurchase of shares		(134,813)	(104,768)	(5,554)
Cash dividends paid - preferred stock - noncontrolling interest		(11,465)	(11,465)	(11,434)
Cash dividends paid - Series A preferred stock		(6,200)	(6,200)	(6,200)
Term borrowings:
Issuance		0	0	121,184
Payments/maturities		(405,562)	(69,025)	(147,413)
Increases in restricted and secured term borrowings		9,635	20,477	7,960
Net increase/(decrease) in:
Deposits		(253,459)	2,092,519	(197,158)
Short-term borrowings		2,384,391	(2,548,712)	2,080,039
Net cash provided/(used) by financing activities		1,421,116	(761,398)	1,767,652
Net increase/(decrease) in cash and cash equivalents		(138,432)	(46,721)	414,252
Cash and cash equivalents at beginning of period		1,405,325	1,452,046	1,037,794
Cash and cash equivalents at end of period		1,266,893	1,405,325	1,452,046
Supplemental Disclosures
Total interest paid		410,883	307,578	140,373
Total taxes paid		70,505	42,817	54,417
Total taxes refunded		27,889	48,455	8,285
Transfer from loans to OREO		8,996	12,106	6,624
Transfer from loans HFS to trading securities		1,321,145	1,389,420	1,004,416
Transfer from loans to loans HFS		$ 31,465	$ 0	$ 0
[1]	2018 includes $107.4 million related to the sale of approximately $120 million UPB of subprime auto loans. See Note 2 - Acquisitions and Divestitures for additional information.

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Gross proceeds from settlements and sales	$ 817,863	$ 919,187
Repurchase of shares	134,813	104,768
Portion of Sub-prime Auto Loan Portfolios
Gross proceeds from settlements and sales		107,400
Loans disposed of		120,000
First Horizon Share Repurchase Program
Repurchase of shares	$ 129,900	$ 99,400

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Accounting. The consolidated financial statements of First Horizon National Corporation (“FHN”), including its subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America and follow general practices within the industries in which it operates. This preparation requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates and assumptions are based on information available as of the date of the financial statements and could differ from actual results. Principles of Consolidation and Basis of Presentation. The consolidated financial statements include the accounts of FHN and other entities in which it has a controlling financial interest. Variable Interest Entities (“VIEs”) for which FHN or a subsidiary has been determined to be the primary beneficiary are also consolidated. Affiliates for which FHN is not considered the primary beneficiary and in which FHN does not have a controlling financial interest are accounted for by the equity method. These investments are included in other assets, and FHN’s proportionate share of income or loss is included in noninterest income. All significant intercompany transactions and balances have been eliminated. For purposes of comparability, certain prior period amounts have been reclassified to conform to current year presentation. Business Combinations. FHN accounts for acquisitions meeting the definition of a business combination in accordance with ASC 805, "Business Combinations," which requires acquired assets and liabilities (other than tax, certain benefit plan balances, and starting in 2019 certain lease-related assets and liabilities) to be recorded at fair value. Business combinations are included in the financial statements from the respective dates of acquisition. Acquisition related costs are expensed as incurred. Revenues. Revenue is recognized when the performance obligations under the terms of a contract with a customer are satisfied in an amount that reflects the consideration FHN expects to be entitled. FHN derives a significant portion of its revenues from fee-based services. Noninterest income from transaction-based fees is generally recognized immediately upon completion of the transaction. Noninterest income from service-based fees is generally recognized over the period in which FHN provides the service. Any services performed over time generally require that FHN render services each period and therefore FHN measures progress in completing these services based upon the passage of time and recognizes revenue as invoiced. Following is a discussion of FHN's key revenues within the scope of Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers", and all related amendments, except as noted. Fixed Income. Fixed income includes fixed income securities sales, trading, and strategies, loan sales and derivative sales which are not within the scope of revenue from contracts with customers. Fixed income also includes investment banking fees earned for services related to underwriting debt securities and performing portfolio advisory services. FHN's performance obligation for underwriting services is satisfied on the trade date while advisory services is satisfied over time. Deposit Transactions and Cash Management. Deposit transactions and cash management activities include fees for services related to consumer and commercial deposit products (such as service charges on checking accounts), cash management products and services such as electronic transaction processing (Automated Clearing House and Electronic Data Interchange), account reconciliation services, cash vault services, lockbox processing, and information reporting to large corporate clients. FHN's obligation for transaction-based services is satisfied at the time of the transaction when the service is delivered while FHN's obligation for service based fees is satisfied over the course of each month. Brokerage, Management Fees and Commissions. Brokerage, management fees and commissions include fees for portfolio management, trade commissions, and annuity and mutual fund sales. Asset-based management fees are charged based on the market value of the client’s assets. The services associated with these revenues, which include investment advice and active management of client assets are generally performed and recognized over a month or quarter. Transactional revenues are based on the size and number of transactions executed at the client’s direction and are generally recognized on the trade date. Trust Services and Investment Management. Trust services and investment management fees include investment management, personal trust, employee benefits, and custodial trust services. Obligations for trust services are generally satisfied over time but may be satisfied at points in time for certain activities that are transactional in nature. Bankcard Income. Bankcard income includes credit interchange and network revenues and various card-related fees. Interchange income is recognized concurrently with the delivery of services on a daily basis. Card-related fees such as late fees, currency conversion, and cash advance fees are loan-related and excluded from the scope of ASU 2014-09. Contract Balances. As of December 31, 2019, accounts receivable related to products and services on non-interest income were $8.7 million . For the year ended December 31, 2019, FHN had no material impairment losses on non-interest accounts receivable and there were no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Statement of Condition as of December 31, 2019. Transaction Price Allocated to Remaining Performance Obligations. For the year ended December 31, 2019, revenue recognized from performance obligations related to prior periods was not material. Revenue expected to be recognized in any future year related to remaining performance obligations, excluding revenue pertaining to contracts that have an original expected duration of one year or less and contracts where revenue is recognized as invoiced, is not material. Refer to Note 20 - Business Segment Information for a reconciliation of disaggregated revenue by major product line and reportable segment. Debt Investment Securities. Available-for-sale ("AFS") and held-to-maturity (“HTM”) securities are reviewed quarterly for possible other-than-temporary impairment (“OTTI”). The review includes an analysis of the facts and circumstances of each individual investment such as the degree of loss, the length of time the fair value has been below cost, the expectation for that security’s performance, the creditworthiness of the issuer and FHN’s intent and ability to hold the security. Debt securities that may be sold prior to maturity are classified as AFS and are carried at fair value. The unrealized gains and losses on debt securities AFS, including securities for which no credit impairment exists, are excluded from earnings and are reported, net of tax, as a component of other comprehensive income within shareholders’ equity and the Statements of Comprehensive Income. Debt securities which management has the intent and ability to hold to maturity are reported at amortized cost. Interest-only strips that are classified as securities AFS are valued at elected fair value. See Note 24 - Fair Value of Assets and Liabilities for additional information. Realized gains and losses for investment securities are determined by the specific identification method and reported in noninterest income. Declines in value judged to be other-than-temporary based on FHN’s analysis of the facts and circumstances related to an individual investment, including securities that FHN has the intent to sell, are also determined by the specific identification method. For HTM debt securities, OTTI recognized is typically credit-related and is reported in noninterest income. For impaired AFS debt securities that FHN does not intend to sell and will not be required to sell prior to recovery but for which credit losses exist, the OTTI recognized is separated between the total impairment related to credit losses which is reported in noninterest income, and the impairment related to all other factors which is excluded from earnings and reported, net of tax, as a component of other comprehensive income within shareholders’ equity and the Statements of Comprehensive Income. Equity Investment Securities. Equity securities are classified in Other assets. National banks chartered by the federal government are, and banks organized under state law may apply to be, members of the Federal Reserve System. Each member bank is required to own stock in its regional Federal Reserve Bank ("FRB"). Given this requirement, FRB stock may not be sold, traded, or pledged as collateral for loans. Membership in the Federal Home Loan Bank (“FHLB”) network requires ownership of capital stock. Member banks are entitled to borrow funds from the FHLB and are required to pledge mortgage loans as collateral. Investments in the FHLB are non-transferable and, generally, membership is maintained primarily to provide a source of liquidity as needed. FRB and FHLB stock are recorded at cost and are subject to impairment reviews. FHN's subsidiary, First Horizon Bank, was a member bank throughout 2019, initially as a national bank and later as a state member bank. Other equity investments primarily consist of mutual funds which are marked to fair value through earnings. Smaller balances of equity investments without a readily determinable fair value are recorded at cost minus impairment with adjustments through earnings for observable price changes in orderly transactions for the identical or a similar investment of the same issuer. Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase. FHN purchases short-term securities under agreements to resell which are accounted for as collateralized financings except where FHN does not have an agreement to sell the same or substantially the same securities before maturity at a fixed or determinable price. All of FHN’s securities purchased under agreements to resell are recognized as collateralized financings. Securities delivered under these transactions are delivered to either the dealer custody account at the FRB or to the applicable counterparty. Securities sold under agreements to repurchase are offered to cash management customers as an automated, collateralized investment account. Securities sold under agreements to repurchase are also used by the consumer/commercial bank to obtain favorable borrowing rates on its purchased funds. All of FHN's securities sold under agreements to repurchase are secured borrowings. Collateral is valued daily and FHN may require counterparties to deposit additional securities or cash as collateral, or FHN may return cash or securities previously pledged by counterparties, or FHN may be required to post additional securities or cash as collateral, based on the contractual requirements for these transactions. FHN’s fixed income business utilizes securities borrowing arrangements as part of its trading operations. Securities borrowing transactions generally require FHN to deposit cash with the securities lender. The amount of cash advanced is recorded within Securities purchased under agreements to resell in the Consolidated Statements of Condition. These transactions are not considered purchases and the securities borrowed are not recognized by FHN. FHN does not conduct securities lending transactions. Loans Held-for-Sale. Loans originated or purchased for which management lacks the intent to hold are included in loans held-for-sale in the Consolidated Statements of Condition. FHN has elected the fair value option on a prospective basis for certain mortgage loans held-for-sale and repurchased loans that are not governmentally insured. Such loans are carried at fair value, with changes in the fair value recognized in the other income section of the Consolidated Statements of Income. For mortgage loans originated for sale for which the fair value option was elected, loan origination fees were recorded by FHN when earned and related direct loan origination costs are recognized when incurred. See Note 24 - Fair Value of Assets and Liabilities for additional information. FHN accounts for all other loans held-for-sale at the lower of cost or market value (“LOCOM”). Loans. Generally, loans are stated at principal amounts outstanding, net of unearned income. Interest on loans is recognized on an accrual basis at the applicable interest rate on the principal amount outstanding. Loan origination fees and direct costs as well as premiums and discounts are amortized as level yield adjustments over the respective loan terms. Unamortized net fees or costs, premiums and discounts are recognized in interest income upon early repayment of the loans. Cash collections from loans that were fully charged off prior to acquisition are recognized in noninterest income. Loan commitment fees are generally deferred and amortized on a straight-line basis over the commitment period. Nonaccrual and Past Due Loans. Generally, loans are placed on nonaccrual status if it becomes evident that full collection of principal and interest is at risk, impairment has been recognized as a partial charge-off of principal balance due to insufficient collateral value and past due status, or on a case-by-case basis if FHN continues to receive payments, but there are other borrower-specific issues. • The accrual status policy for commercial troubled debt restructurings (“TDRs”) follows the same internal policies and procedures as other commercial portfolio loans. • Residential real estate secured loans discharged in bankruptcy that have not been reaffirmed by the borrower (“discharged bankruptcies”) are placed on nonaccrual regardless of delinquency status and are reported as TDRs. • Current second lien residential real estate loans that are junior to first liens are placed on nonaccrual status if the first lien is 90 or more days past due, is a bankruptcy, or is a troubled debt restructuring. • Consumer real estate (HELOC and residential real estate installment loans), if not already on nonaccrual per above situations, are placed on nonaccrual if the loan is 30 or more days delinquent at the time of modification and is also determined to be a TDR. • Government guaranteed/insured residential mortgage loans remain on accrual (even if the loan falls into one of the above categories) because the collection of principal and interest is reasonably assured. For commercial and consumer loans within each portfolio segment and class that have been placed on nonaccrual status, accrued but uncollected interest is reversed and charged against interest income when the loan is placed on nonaccrual status. Management may elect to continue the accrual of interest when the estimated net realizable value of collateral is sufficient to recover the principal balance and accrued interest. Interest payments received on nonaccrual loans are normally applied to outstanding principal first. Once all principal has been received, additional interest payments are recognized on a cash basis as interest income. Generally, commercial and consumer loans within each portfolio segment and class that have been placed on nonaccrual status can be returned to accrual status if all principal and interest is current and FHN expects full repayment of the remaining contractual principal and interest. This typically requires that a borrower make payments in accordance with the contractual terms for a sustained period of time (generally for a minimum of six months) before being returned to accrual status. For TDRs, FHN may also consider a borrower’s sustained historical repayment performance for a reasonable time prior to the restructuring in assessing whether the borrower can meet the restructured terms, as it may indicate whether the borrower is capable of servicing the level of debt under the modified terms. Residential real estate loans discharged through Chapter 7 bankruptcy and not reaffirmed by the borrower are not returned to accrual status. For current second liens that have been placed on nonaccrual because the first lien is 90 or more days past due or is a TDR or bankruptcy, the second lien may be returned to accrual upon pay-off or cure of the first lien. Charge-offs. For all commercial and consumer loan portfolio segments, all losses of principal are charged to the allowance for loan losses ("ALLL") in the period in which the loan is deemed to be uncollectible. For consumer loans, the timing of a full or partial charge-off generally depends on the loan type and delinquency status. Generally, for the consumer real estate and permanent mortgage portfolio segments, a loan will be either partially or fully charged-off when it becomes 180 days past due. At this time, if the collateral value does not support foreclosure, balances are fully charged-off and other avenues of recovery are pursued. If the collateral value supports foreclosure, the loan is charged-down to net realizable value (collateral value less estimated costs to sell) and is placed on nonaccrual status. For residential real estate loans discharged in Chapter 7 bankruptcy and not reaffirmed by the borrower, the fair value of the collateral position is assessed at the time FHN is made aware of the discharge and the loan is charged down to the net realizable value (collateral value less estimated costs to sell). Within the credit card and other portfolio segment, credit cards and installment loans secured by automobiles are normally charged-off upon reaching 180 days past due while other non-real estate consumer loans are charged-off upon reaching 120 days past due. Impaired Loans. Impaired loans include nonaccrual commercial loans greater than $1 million and modified consumer and commercial loans that have been classified as a TDR and are individually measured for impairment under the guidance of ASC 310. TDRs are always reported as such unless the TDR has exhibited sustained performance, was reported as a TDR over a year-end, and the modified terms were market-based at the time of modification. Purchased Credit-Impaired Loans. ASC 310-30 “Accounting for Certain Loans or Debt Securities Acquired in a Transfer,” provides guidance for acquired loans that have exhibited deterioration of credit quality between origination and the time of acquisition and for which the timely collection of the interest and principal is not reasonably assured (“PCI loans”). PCI loans are initially recorded at fair value which is estimated by discounting expected cash flows at acquisition date. The expected cash flows include all contractually expected amounts (including interest) and incorporate an estimate for future expected credit losses, pre-payment assumptions, and yield requirement for a market participant, among other things. To the extent possible, certain PCI loans were aggregated into pools with composite interest rate and cash flows expected to be collected for the pool. Aggregation into loan pools is based upon common risk characteristics that include similar credit risk or risk ratings, and one or more predominant risk characteristics. Each PCI pool is accounted for as a single unit. Accretable yield is initially established at acquisition and is the excess of cash flows expected at acquisition over the initial investment in the loan and is recognized in interest income over the remaining life of the loan, or pool of loans. Nonaccretable difference is initially established at acquisition and is the difference between the contractually required payments at acquisition and the cash flows expected to be collected at acquisition. FHN estimates expected cash flows for PCI loans on a quarterly basis. Increases in expected cash flows from the last measurement result in reversal of any nonaccretable difference (or allowance for loan losses to the extent any has previously been recorded) with a prospective positive impact on interest income. Decreases to the expected cash flows result in an increase in the allowance for loan losses through provision expense. FHN does not report PCI loans as nonperforming loans due to the accretion of interest income. Additionally, PCI loans that have been pooled and subsequently modified will not be reported as troubled debt restructurings since the pool is the unit of measurement. Allowance for Loan Losses. The ALLL is maintained at a level that management determines is sufficient to absorb estimated probable incurred losses in the loan portfolio. The ALLL is increased by the provision for loan losses and loan recoveries and is decreased by loan charge-offs. The ALLL is determined in accordance with ASC 450-20-50 "Contingencies - Accruals for Loss Contingencies" and is composed of reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer and commercial loans. The reserve factors applied to these pools are an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics. Additionally, the ALLL includes specific reserves established in accordance with ASC 310-10-35 for loans determined by management to be individually impaired as well as reserves associated with PCI loans. Management uses analytical models to estimate probable incurred losses in the loan portfolio as of the balance sheet date. The models, which are primarily driven by historical losses, are carefully reviewed to identify trends that may not be captured in the historical loss factors used in the models. Management uses qualitative adjustments for those items not yet captured in the models like current events, recent trends in the portfolio, current underwriting guidelines, and local and macroeconomic trends, among other things. The nature of the process by which FHN determines the appropriate ALLL requires the exercise of considerable judgment. See Note 5 - Allowance for Loan Losses for a discussion of FHN’s ALLL methodology and a description of the models utilized in the estimation process for the commercial and consumer loan portfolios. Key components of the estimation process are as follows: (1) commercial loans determined by management to be individually impaired loans are evaluated individually and specific reserves are determined based on the difference between the outstanding loan amount and the estimated net realizable value of the collateral (if collateral dependent), the present value of expected future cash flows or by observable market prices; (2) individual commercial loans not considered to be individually impaired are segmented based on similar credit risk characteristics and evaluated on a pool basis; (3) reserve rates for the commercial segment are calculated based on historical net charge-offs and are subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); (4) management’s estimate of probable incurred losses reflects the reserve rates applied against the balance of loans in the commercial segment of the loan portfolio; (5) consumer loans are generally segmented based on loan type; (6) reserve amounts for each consumer portfolio segment are calculated using analytical models based on delinquency trends and net loss experience and are subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); and (7) the reserve amount for each consumer portfolio segment reflects management’s estimate of probable incurred losses in the consumer segment of the loan portfolio. Impairment related to individually impaired loans is measured in accordance with ASC 310-10. For all commercial portfolio segments, commercial TDRs and other individually impaired commercial loans are measured based on the present value of expected future payments discounted at the loan’s effective interest rate (“the DCF method”), observable market prices, or for loans that are solely dependent on the collateral for repayment, the net realizable value (collateral value less estimated costs to sell). Impaired loans also include consumer TDRs. Future adjustments to the ALLL may be necessary if economic or other conditions differ substantially from the assumptions used in making the estimates or, if required by regulators, based upon information at the time of their examinations or upon future regulatory guidance. Such adjustments to original estimates, as necessary, are made in the period in which these factors and other relevant considerations indicate that loss levels vary from previous estimates. Premises and Equipment. Premises and equipment are carried at cost less accumulated depreciation and amortization and include additions that materially extend the useful lives of existing premises and equipment. All other maintenance and repair expenditures are expensed as incurred. Premises and equipment held-for-sale are generally valued at appraised values which reference recent disposition values for similar property types but also consider marketability discounts for vacant properties. The valuations of premises and equipment held-for-sale are reduced by estimated costs to sell. Impairments, and any subsequent recoveries, are recorded in noninterest expense. Gains and losses on dispositions are reflected in noninterest income and expense, respectively. Depreciation and amortization are computed on the straight-line method over the estimated useful lives of the assets and are recorded as noninterest expense. Leasehold improvements are amortized over the lesser of the lease periods or the estimated useful lives using the straight-line method. Useful lives utilized in determining depreciation for furniture, fixtures and equipment and for buildings are three years to fifteen years and seven years to forty-five years , respectively. Other Real Estate Owned ("OREO"). Real estate acquired by foreclosure or other real estate-owned consists of properties that have been acquired in satisfaction of debt. These properties are carried at the lower of the outstanding loan amount or estimated fair value less estimated costs to sell the real estate. At the time acquired, and in conjunction with the transfer from loans to OREO, there is a charge-off against the ALLL if the estimated fair value less costs to sell is less than the loan’s cost basis. Subsequent declines in fair value and gains or losses on dispositions, if any, are charged to All other expense on the Consolidated Statements of Income. Properties acquired by foreclosure in compliance with HUD servicing guidelines prior to January 1, 2015, are included in “OREO” and are carried at the estimated amount of the underlying government insurance or guarantee. On December 31, 2019, FHN had $2.2 million of these properties. Required developmental costs associated with acquired property under construction are capitalized and included in determining the estimated net realizable value of the property, which is reviewed periodically, and any write-downs are charged against current earnings. Intangible Assets. Intangible assets consist of “Other intangible assets” and “Goodwill.” Other intangible assets represent customer lists and relationships, acquired contracts, covenants not to compete and premium on purchased deposits, which are amortized over their estimated useful lives. Intangible assets related to acquired deposit bases are primarily amortized over 10 years using an accelerated method. Management evaluates whether events or circumstances have occurred that indicate the remaining useful life or carrying value of amortizing intangibles should be revised. Goodwill represents the excess of cost over net assets of acquired businesses less identifiable intangible assets. On an annual basis, FHN assesses goodwill for impairment. Derivative Financial Instruments. FHN accounts for derivative financial instruments in accordance with ASC 815 which requires recognition of all derivative instruments on the balance sheet as either an asset or liability measured at fair value through adjustments to either accumulated other comprehensive income within shareholders’ equity or current earnings. Fair value is defined as the price that would be received to sell a derivative asset or paid to transfer a derivative liability in an orderly transaction between market participants on the transaction date. Fair value is determined using available market information and appropriate valuation methodologies. FHN has elected to present its derivative assets and liabilities gross on the Consolidated Statements of Condition. Amounts of collateral posted or received have not been netted with the related derivatives unless the collateral amounts are considered legal settlements of the related derivative positions. See Note 22 - Derivatives for discussion on netting of derivatives. FHN prepares written hedge documentation, identifying the risk management objective and designating the derivative instrument as a fair value hedge or cash flow hedge as applicable, or as a free-standing derivative instrument entered into as an economic hedge or to meet customers’ needs. All transactions designated as ASC 815 hedges must be assessed at inception and on an ongoing basis as to the effectiveness of the derivative instrument in offsetting changes in fair value or cash flows of the hedged item. For a fair value hedge, changes in the fair value of the derivative instrument and changes in the fair value of the hedged asset or liability attributable to the hedged risk are recognized currently in earnings. For a cash flow hedge, changes in the fair value of the derivative instrument are recorded in accumulated other comprehensive income and subsequently reclassified to earnings as the hedged transaction impacts net income. Prior to 2018, ineffectiveness in debt and cash flow hedges was recorded in noninterest expense. Starting in 2018, for fair value hedges, the entire change in the fair value of the hedging instrument included in the assessment of effectiveness is recorded to the same financial statement line item (e.g., interest expense) used to present the earnings effect of the hedged item. For cash flow hedges, the entire fair value change of the hedging instrument that is included in the assessment of hedge effectiveness is initially recorded in other comprehensive income and later recycled into earnings as the hedged transaction(s) affect net income with the income statement effects recorded in the same financial statement line item used to present the earnings effect of the hedged item (e.g., interest income). For free-standing derivative instruments, changes in fair values are recognized currently in earnings. See Note 22 - Derivatives for additional information. Cash flows from derivative contracts are reported as operating activities on the Consolidated Statements of Cash Flows. Leases. At inception, all arrangements are evaluated to determine if they contain a lease, which is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant, or equipment for a period of time in exchange for consideration. Control is deemed to exist when a lessor has granted and a lessee has received both the right to obtain substantially all of the economic benefits from use of the identified asset and the right to direct the use of the identified asset throughout the period of use. Lessee. As a lessee, FHN recognizes lease (right-of-use) assets and lease liabilities for all leasing arrangements with lease terms that are greater than one year. The lease asset and lease liability are recognized at the present value of estimated future lease payments, including estimated renewal periods, with the discount rate reflecting a fully-collateralized rate matching the estimated lease term. Renewal options are included in the estimated lease term if they are considered reasonably certain of exercise. Periods covered by termination options are included in the lease term if it is reasonably certain they will not be exercised. Additionally, prepaid or accrued lease payments, lease incentives and initial direct costs related to lease arrangements are recognized within the right-of-use asset. Each lease is classifi

Acquisitions and Divestitures

Acquisitions and Divestitures	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures On November 4, 2019, FHN and IBERIABANK Corporation (“IBKC”) announced that they had entered into an agreement and plan of merger under which IBKC will merge with FHN in a merger-of-equals transaction. IBKC, headquartered in Lafayette, Louisiana, has 319 offices in 12 states, mostly in the southern and southeastern U.S., and has reported $31.7 billion of total assets, $24.0 billion in loans, and $25.2 billion in deposits, at December 31, 2019. IBKC's common stock is listed on The NASDAQ Stock Market, LLC under the symbol IBKC. Under the merger agreement, each share of IBKC common stock will be converted into 4.584 shares of FHN common stock. After closing, FHN expects IBKC common shares will be converted into approximately 44 percent of the then-outstanding shares of FHN common stock. The merger agreement requires FHN to expand its board of directors to seventeen persons; after closing, eight board positions will be held by current IBKC directors, and nine will be held by current FHN directors. FHN expects the transaction to close mid-2020, subject to regulatory approvals, approval by the shareholders of FHN and of IBKC, and other customary conditions. Merger and integration expenses related to the pending merger of equals with IBKC are recorded in FHN’s Corporate segment. Total merger expenses for the IBKC merger recognized during 2019 were as follows: Year Ended (Dollars in thousands) 2019 Professional fees (a) $ 8,228 Employee compensation, incentives and benefits (b) 3,079 Miscellaneous expense (c) 64 Total IBKC merger expense $ 11,371 (a) Primarily comprised of fees for legal, accounting, investment bankers, and merger consultants. (b) Primarily comprised of fees for severance and retention. (c) Primarily comprised of fees for travel and entertainment. On November 8, 2019, FHN announced an agreement for First Horizon Bank to purchase 30 branches from SunTrust Bank in conjunction with SunTrust Banks, Inc.'s merger with BB&T Corporation, which created Truist Financial Corp. As part of the agreement, FHN will assume approximately $2.4 billion of branch deposits for a 3.40 percent deposit premium and purchase approximately $410 million of branch loans. The branches are in communities in North Carolina ( 20 branches), Virginia ( 8 branches), and Georgia ( 2 branches). FHN expects the purchase to close in second quarter 2020, subject to customary closing conditions. On November 30, 2017, FHN completed its acquisition of Capital Bank Financial Corporation ("CBF") and its subsidiaries, including Capital Bank Corporation, for an aggregate of 92,042,232 shares of FHN common stock and $423.6 million in cash in a transaction valued at $2.2 billion . In second quarter 2018, FHN canceled 2,373,220 common shares which had been issued but set aside for certain shareholders of CBF who have commenced a dissenters' appraisal process resulting in a reduction in equity consideration and an increase in cash consideration of $46.0 million . In October 2019 this matter was resolved and the financial statement effects were not significant. CBF operated 178 branches in North and South Carolina, Tennessee, Florida and Virginia at the time of closing. In relation to the acquisition, FHN acquired approximately $9.8 billion in assets, including approximately $7.3 billion in loans and $1.2 billion in AFS securities, and assumed approximately $8.1 billion of CBF deposits. The following schedule details acquired assets and liabilities and consideration paid, as well as adjustments to record the assets and liabilities at their estimated fair values as of November 30, 2017. These fair value measurements are based on third party and internal valuations. Capital Bank Financial Corporation As Purchase Accounting/Fair Acquired Value Adjustments (unaudited) As recorded (Dollars in thousands) (unaudited) 2017 2018 (a) by FHN Assets: Cash and cash equivalents $ 205,999 $ — $ — $ 205,999 Trading securities 4,758 (4,758 ) (b) — — Loans held-for-sale — 134,003 (11,034 ) 122,969 Securities available-for-sale 1,017,867 175,526 — 1,193,393 Securities held-to-maturity 177,549 (177,549 ) — — Loans 7,596,049 (320,372 ) 867 7,276,544 Allowance for loan losses (45,711 ) 45,711 — — CBF Goodwill 231,292 (231,292 ) — — Other intangible assets 24,498 119,302 (2,593 ) 141,207 Premises and equipment 196,298 37,054 (9,470 ) 223,882 OREO 43,077 (9,149 ) (315 ) 33,613 Other assets 617,232 41,320 (c) (22,422 ) (c) 636,130 Total assets acquired $ 10,068,908 $ (190,204 ) $ (44,967 ) $ 9,833,737 Liabilities: Deposits $ 8,141,593 $ (849 ) $ (642 ) $ 8,140,102 Securities sold under agreements to repurchase 26,664 — — 26,664 Other short-term borrowings 390,391 — — 390,391 Term borrowings 119,486 67,683 — 187,169 Other liabilities 59,995 4,291 1,631 65,917 Total liabilities assumed 8,738,129 71,125 989 8,810,243 Net assets acquired $ 1,330,779 $ (261,329 ) $ (45,956 ) 1,023,494 Consideration paid: Equity (1,746,718 ) Cash (469,615 ) Total consideration paid (2,216,333 ) Goodwill $ 1,192,839 (a) Amounts reflect adjustments made to provisional fair value estimates during the measurement period ending November 30, 2018. These adjustments were recorded in FHN's Consolidated Statement of Condition in 2018 with a corresponding adjustment to goodwill. (b) Amount represents a conformity adjustment to align with FHN presentation. (c) Amount primarily relates to a net deferred tax asset recorded for the effects of the purchase accounting adjustments and adjustments for acquired tax contingencies. In relation to the acquisition, FHN recorded goodwill of approximately $1.2 billion , representing the excess of acquisition consideration over the estimated fair value of net assets acquired. All goodwill has been attributed to FHN’s Regional Banking segment (refer to Note 7 - Intangible Assets for additional information). This goodwill is the result of 1) the addition of an experienced workforce, 2) expected synergies to be realized within overlapping banking markets, 3) operational efficiencies obtained through integration of back office functions and 4) proportionately lower net operating costs from a larger company scale. $17.0 million of goodwill was determined to be deductible for tax purposes as a result of tax bases carryover resulting from prior CBF acquisitions. FHN’s operating results for 2018 and 2017 include the operating results of the assets and liabilities acquired from CBF subsequent to the acquisition on November 30, 2017. Following is a description of the methods used to determine the fair values of significant assets and liabilities presented above. Cash and cash equivalents: The carrying amount of these assets is a reasonable estimate of fair value based on the short-term nature of these assets. Securities available-for-sale: Fair values for securities are based on quoted prices where available. If quoted market prices are not available, fair value estimates are based on observable inputs obtained from market transactions in similar securities. Securities held-to-maturity were reclassified to securities available-for-sale based on FHN’s intent at closing. Loans and loans held-for-sale: Fair values for loans were based on a discounted cash flow methodology that considered factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan, amortization status and current discount rates. Loans were aggregated according to similar characteristics when applying various valuation techniques. The discount rate does not include a factor for credit losses as that has been included as a reduction to the estimated cash flows. Loans held-for-sale were classified according to FHN’s intent at closing. The valuation of loans held-for-sale reflects contractual or bid prices. Intangible assets: Core deposit intangible ("CDI") represents the value of the relationships with deposit customers. The fair value was based on a discounted cash flow methodology that considered expected customer attrition rates, net maintenance cost of the deposit base, alternate costs of funds, and the interest costs associated with customer deposits. The CDI is being amortized over 10 years using an accelerated methodology based upon the period over which estimated economic benefits are estimated to be received. Lease intangibles are valued using a discounted cash flow methodology which compares the current contractual rental payments to estimated current market rents for the property. Premises and Equipment: Land and buildings held-for-use are valued at appraised values, which reflect considerations of recent disposition values for similar property types with adjustments for characteristics of individual properties. Locations held-for-sale are valued at appraised values which also reference recent disposition values for similar property types but also considers marketability discounts for vacant properties. The valuations of locations held-for-sale are reduced by estimated costs to sell. Other fixed assets are valued using a discounted cash flow methodology which reflects estimates of the future value of the assets to a hypothetical buyer. OREO: OREO properties are valued at estimated fair value less estimated costs to sell the real estate. Estimated fair value is determined using appraised values which includes consideration of recent disposition values for similar property types with adjustments for characteristics of individual properties. Deposits: The fair values used for the demand and savings deposits by definition equal the amount payable on demand at the acquisition date. The fair values for time deposits are estimated using a discounted cash flow calculation using the remaining duration of the accounts and reflects the difference in interest rates currently being offered to the contractual interest rates on such time deposits. Securities sold under agreements to repurchase and Other short-term borrowings: The carrying amount of these liabilities is a reasonable estimate of fair value based on the short-term nature of these liabilities. Term borrowings: The fair values of long-term debt instruments are estimated based on quoted market prices for the instrument if available, or for similar instruments if not available, or by using discounted cash flow analysis, based on estimated current borrowing rates for similar types of instruments and considers whether the debt is currently callable. Estimated discount rates are determined from the perspective of the post-merger combined entity rather than the acquiree and/or original issuers. The following table presents financial information regarding the former CBF operations included in FHN's Consolidated Statements of Income from the date of acquisition (November 30, 2017) through December 31, 2017. Additionally, the table presents unaudited proforma information as if the acquisition of CBF had occurred on January 1, 2016: Actual from acquisition date through Unaudited Pro Forma for Year Ended December 31 (Dollars in thousands) December 31, 2017 2017 2016 Net interest income $ 31,253 $ 1,165,006 $ 1,033,218 Noninterest income 6,192 563,581 638,493 Pre-tax income 16,534 476,911 458,667 Net income available to common shareholders (a) NM 274,416 293,981 (a) Net income available to common shareholders is not meaningful for actual CBF results from the acquisition date through December 31, 2017 because of the effect of tax reform. The pro forma financial information and explanatory notes have been prepared to illustrate the effects of the merger between FHN and CBF under the acquisition method of accounting. The pro forma financial information is presented for illustrative purposes only and does not necessarily indicate the financial results of the combined companies had the companies actually been combined at the beginning of each period presented, nor does it necessarily indicate the results of operations in future periods or the future financial position of the combined entities. Cost savings and other business synergies related to the acquisition are not reflected in the pro forma amounts. This unaudited pro forma information combines the historical consolidated results of operations of FHN and CBF for the periods presented and gives effect to the following nonrecurring adjustments: Fair value adjustments: Pro forma adjustment to net interest income of $34.5 million and $46.5 million for the years ended December 31, 2017 and 2016, respectively, to record estimated amortization of premiums and accretion of discounts on acquired loans, securities, deposits, and term borrowings. CBF accretion/amortization: Pro forma adjustment to net interest income of $24.4 million and $25.9 million for the years ended December 31, 2017 and 2016, respectively, to eliminate CBF amortization of premiums and accretion of discounts on previously acquired loans, securities, and deposits. Amortization of acquired intangibles: Pro forma adjustment to noninterest expense of $15.8 million and $18.0 million for the years ended December 31, 2017 and 2016, respectively, to record estimated amortization on acquired CDI and other lease intangibles. Other adjustments: Pro forma results also include adjustments related to the removal of CBF's intangible amortization expense, amortization of previously acquired lease intangibles, and FHN's merger-related costs. Also includes adjustments to depreciation expense to record estimated fair value marks for CBF tangible assets, as well as income-tax effects of pro forma adjustments. All expenses related to the merger and integration with CBF are recorded in FHN's Corporate segment. Integration activities were substantially completed in second quarter 2018. Total CBF merger and integration expense recognized for the years ended December 31, 2019 , 2018 , and 2017 are presented in the table below: Years Ended (Dollars in thousands) 2019 2018 2017 Professional fees (a) $ 11,221 $ 22,337 $ 28,151 Employee compensation, incentives and benefits (b) 1,189 9,613 17,077 Contract employment and outsourcing (c) 240 3,681 1,270 Occupancy (d) 1,453 5,236 15 Miscellaneous expense (e) 2,072 7,652 1,291 All other expense (f) 6,695 43,874 8,944 Total $ 22,870 $ 92,393 $ 56,748 (a) Primarily comprised of fees for legal, accounting, investment bankers, and merger consultants. (b) Primarily comprised of fees for severance and retention. (c) Primarily relates to fees for temporary assistance for merger and integration activities. (d) Primarily relates to fees associated with lease exit accruals. (e) Consists of fees for operations services, communications and courier, equipment rentals, depreciation, and maintenance, supplies, travel and entertainment, computer software, and advertising and public relations. (f) Primarily relates to contract termination charges, costs of shareholder matters and asset impairments related to the integration, as well as other miscellaneous expenses. In first quarter 2018, FHN divested two branches, including approximately $30 million of deposits and $2 million of loans. The branches, both in Greeneville, Tennessee, were divested in connection with First Horizon's agreement with the U.S. Department of Justice and commitments to the Board of Governors of the Federal Reserve System, which were entered into in connection with a customary review of FHN's merger with CBF. In second quarter 2018, FHN sold approximately $120 million UPB of its subprime auto loans. These loans, originally acquired as part of the CBF acquisition, did not fit within FHN's risk profile. Based on the sales price, a measurement period adjustment to the acquisition-date fair value of the subprime auto loans was recorded in second quarter 2018. A measurement period adjustment was made in fourth quarter 2018 for other consumer loans acquired from CBF based on pricing information received from potential buyers. On April 3, 2017, FHN Financial (formerly FTN Financial or "FTNF") acquired substantially all of the assets and assumed substantially all of the liabilities of Coastal Securities, Inc. (“Coastal”), a national leader in the trading, securiti zation, and analysis of Small Business Administration (“SBA”) loans, for appro ximately $131 million in cash. Coastal, which was based in Houston, TX, also traded United States Department of Agriculture (“USDA”) loans and fixed income products and provided municipal underwriting and advisory services to its clients. Coastal’s government-guaranteed loan products, combined with FHN Financial’s existing SBA trading activities, have established an additional major product sector for FHN Financial. The following schedule details acquired assets and liabilities and consideration paid, as well as adjustments to record the assets and liabilities at their estimated fair values as of April 3, 2017: Coastal Securities, Inc Purchase Accounting/ As Fair Value Acquired Adjustments As recorded (Dollars in thousands) (unaudited) (unaudited) by FHN Assets: Cash and cash equivalents $ 7,502 $ — $ 7,502 Interest-bearing cash 4,132 — 4,132 Trading securities 423,662 (284,580 ) 139,082 Loans held-for-sale — 236,088 236,088 Investment securities — 1,413 1,413 Other intangible assets, net — 27,300 27,300 Premises and equipment, net 1,229 — 1,229 Other assets 1,658 14 1,672 Total assets acquired $ 438,183 $ (19,765 ) $ 418,418 Liabilities: Securities sold under agreements to repurchase $ 201,595 $ — $ 201,595 Other short-term borrowings 33,509 — 33,509 Fixed income payables 143,647 (47,158 ) 96,489 Other liabilities 958 (642 ) 316 Total liabilities assumed 379,709 (47,800 ) 331,909 Net assets acquired $ 58,474 $ 28,035 86,509 Consideration paid: Cash (131,473 ) Goodwill $ 44,964 In relation to the acquisition, FHN has recorded $45.0 million in goodwill, representing the excess of acquisition consideration over the estimated fair value of net assets acquired (refer to Note 7 - Intangible Assets for additional information), and all of which is expected to be deductible for tax purposes. The goodwill is the result of adding an experienced workforce, establishing an additional major product sector for FHN Financial, expected synergies, and other factors. FHN's operating results for 2017 include the operating results of the acquired assets and assumed liabilities of Coastal subsequent to the acquisition on April 3, 2017. In addition to the transactions mentioned above, FHN acquires or divests assets from time to time in transactions that are considered business combinations or divestitures but are not material to FHN individually or in the aggregate. In April 2019, FHN sold a subsidiary acquired as part of the CBF acquisition that did not fit within FHN's risk profile. The sale resulted in the removal of approximately $25 million

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2019
Marketable Securities [Abstract]
Investment Securities	Investment Securities The following tables summarize FHN’s investment securities on December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale: U.S. treasuries $ 100 $ — $ — $ 100 Government agency issued mortgage-backed securities (“MBS”) 2,316,381 34,692 (2,556 ) 2,348,517 Government agency issued collateralized mortgage obligations (“CMO”) 1,667,773 9,916 (7,197 ) 1,670,492 Other U.S. government agencies 303,463 3,750 (1,121 ) 306,092 Corporates and other debt 40,054 486 — 40,540 State and municipalities 57,232 3,324 (30 ) 60,526 $ 4,385,003 $ 52,168 $ (10,904 ) 4,426,267 AFS securities recorded at fair value through earnings: SBA-interest only strips (a) 19,136 Total securities available-for-sale (b) $ 4,445,403 Securities held-to-maturity: Corporates and other debt $ 10,000 $ 1 $ — $ 10,001 Total securities held-to-maturity $ 10,000 $ 1 $ — $ 10,001 (a) SBA-interest only strips are recorded at elected fair value. See Note 24 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.8 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. December 31, 2018 (Dollars in thousands) Amortized Gross Gross Fair Securities available-for-sale: U.S. treasuries $ 100 $ — $ (2 ) $ 98 Government agency issued MBS 2,473,687 4,819 (58,400 ) 2,420,106 Government agency issued CMO 2,006,488 888 (48,681 ) 1,958,695 Other U.S. government agencies 149,050 809 (73 ) 149,786 Corporates and other debt 55,383 388 (461 ) 55,310 State and municipalities 32,473 314 (214 ) 32,573 $ 4,717,181 $ 7,218 $ (107,831 ) 4,616,568 AFS securities recorded at fair value through earnings: SBA-interest only strips (a) 9,902 Total securities available-for-sale (b) $ 4,626,470 Securities held-to-maturity: Corporates and other debt $ 10,000 $ — $ (157 ) $ 9,843 Total securities held-to-maturity $ 10,000 $ — $ (157 ) $ 9,843 (a) SBA-interest only strips are recorded at elected fair value. See Note 24 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.8 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. The amortized cost and fair value by contractual maturity for the available-for-sale and held-to-maturity debt securities portfolios on December 31, 2019 are provided below: Held-to-Maturity Available-for-Sale (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Within 1 year $ — $ — $ 35,022 $ 35,211 After 1 year; within 5 years — — 209,003 213,108 After 5 years; within 10 years 10,000 10,001 755 3,332 After 10 years — — 156,069 174,743 Subtotal 10,000 10,001 400,849 426,394 Government agency issued MBS and CMO (a) — — 3,984,154 4,019,009 Total $ 10,000 $ 10,001 $ 4,385,003 $ 4,445,403 (a) Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The table below provides information on gross gains and gross losses from debt investment securities for the years ended December 31: Equity securities are included in 2017. Available-for-Sale (Dollars in thousands) 2019 2018 2017 Gross gains on sales of securities $ — $ 52 $ 2,514 Gross (losses) on sales of securities (267 ) — (1,922 ) Net gain/(loss) on sales of securities (a) (b) (267 ) 52 592 (a) Cash proceeds from the sale of available-for-sale securities during 2019 were $191.7 million and were no t material in 2018. Cash proceeds from sales during 2017 were $937.0 million . (b) 2017 includes a $.4 million gain associated with the call of a $4.4 million held-to-maturity municipal bond. The following tables provide information on investments within the available-for-sale portfolio that had unrealized losses as of December 31, 2019 and 2018: As of December 31, 2019 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. treasuries $ — $ — $ 100 $ — $ 100 $ — Government agency issued MBS 174,983 (495 ) 192,755 (2,061 ) 367,738 (2,556 ) Government agency issued CMO 378,815 (1,970 ) 361,124 (5,227 ) 739,939 (7,197 ) Other U.S. government agencies 98,471 (1,121 ) — — 98,471 (1,121 ) States and municipalities 3,551 (30 ) — — 3,551 (30 ) Total temporarily impaired securities $ 655,820 $ (3,616 ) $ 553,979 $ (7,288 ) $ 1,209,799 $ (10,904 ) As of December 31, 2018 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. treasuries $ — $ — $ 98 $ (2 ) $ 98 $ (2 ) Government agency issued MBS 597,008 (12,335 ) 1,537,106 (46,065 ) 2,134,114 (58,400 ) Government agency issued CMO 290,863 (2,860 ) 1,560,420 (45,821 ) 1,851,283 (48,681 ) Other U.S. government agencies 29,776 (73 ) — — 29,776 (73 ) Corporates and other debt 25,114 (344 ) 15,008 (117 ) 40,122 (461 ) States and municipalities 17,292 (214 ) — — 17,292 (214 ) Total temporarily impaired securities $ 960,053 — $ (15,826 ) — $ 3,112,632 — $ (92,005 ) $ 4,072,685 $ (107,831 ) FHN has reviewed debt investment securities that were in unrealized loss positions in accordance with its accounting policy for OTTI and does not consider them other-than-temporarily impaired. For debt securities with unrealized losses, FHN does not intend to sell them and it is more-likely-than-not that FHN will not be required to sell them prior to recovery. The decline in value is primarily attributable to changes in interest rates and not credit losses. The carrying amount of equity investments without a readily determinable fair value was $25.6 million and $21.3 million at December 31, 2019 and 2018, respectively. The year-to-date 2019 and 2018 gross amounts of upward and downward valuation adjustments were not significant. Unrealized gains of $7.0 million and unrealized losses of $1.5 million were recognized during 2019 and 2018 , respectively, for equity investments with readily determinable fair values. In 2018 FHN sold its remaining holdings of Visa Class B Shares resulting in a pre-tax gain of $212.9 million recognized within the Corporate segment. See the Other Derivatives section of Note 22 - Derivatives for more information regarding FHN’s Visa shares.

Loans

Loans	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Loans	Loans The following table provides the balance of loans, net of unearned income, by portfolio segment as of December 31, 2019 and 2018 : December 31 (Dollars in thousands) 2019 2018 Commercial: (a) Commercial, financial, and industrial $ 20,051,091 $ 16,514,328 Commercial real estate 4,337,017 4,030,870 Consumer: Consumer real estate (b) 6,006,749 6,249,516 Permanent mortgage 170,390 222,448 Credit card & other 495,864 518,370 Loans, net of unearned income $ 31,061,111 $ 27,535,532 Allowance for loan losses 200,307 180,424 Total net loans $ 30,860,804 $ 27,355,108 (a) In third quarter 2019, FHN corrected a previous mis-classification of commercial loans and reclassified approximately $410 million of market investor CRE loans from the C&I portfolio to the CRE portfolio. These loans were identified during an internal review and assessment by management of certain loan populations, a portion of which relate to loans acquired as part of the Capital Bank merger. The reclassification of these loan balances between regional banking portfolios did not have an impact on FHN’s consolidated period-end or average balance sheet and had an immaterial effect on the allowance for loan losses. No adjustments were made to prior periods as the impact of the reclassification, including the effect on the allowance for loan losses was deemed to be immaterial in all periods. (b) Balance as of December 31, 2018 includes $16.2 million of restricted real estate loans. See Note 21—Variable Interest Entities for additional information. COMPONENTS OF THE LOAN PORTFOLIO The loan portfolio is disaggregated into segments and then further disaggregated into classes for certain disclosures. GAAP defines a portfolio segment as the level at which an entity develops and documents a systematic method for determining its allowance for credit losses. A class is generally determined based on the initial measurement attribute (i.e., amortized cost or purchased credit-impaired), risk characteristics of the loan, and FHN’s method for monitoring and assessing credit risk. Commercial loan portfolio segments include commercial, financial and industrial (“C&I”) and commercial real estate ("CRE"). Commercial classes within C&I include general C&I, loans to mortgage companies, the trust preferred loans (“TRUPS”) (i.e. long-term unsecured loans to bank and insurance-related businesses) portfolio and purchased credit-impaired (“PCI”) loans. Loans to mortgage companies include commercial lines of credit to qualified mortgage companies primarily for the temporary warehousing of eligible mortgage loans prior to the borrower’s sale of those mortgage loans to third party investors. Commercial classes within CRE include income CRE, residential CRE and PCI loans. Consumer loan portfolio segments include consumer real estate, permanent mortgage, and the credit card and other portfolio. Consumer classes include home equity lines of credit (“HELOCs”), real estate (“R/E”) installment and PCI loans within the consumer real estate segment, permanent mortgage (which is both a segment and a class), and credit card and other. Concentrations FHN has a concentration of residential real estate loans ( 20 percent of total loans), the majority of which is in the consumer real estate segment ( 19 percent of total loans). Loans to finance and insurance companies total $2.8 billion ( 14 percent of the C&I portfolio, or 9 percent of the total loans). FHN had loans to mortgage companies totaling $4.4 billion ( 22 percent of the C&I segment, or 14 percent of total loans) as of December 31, 2019 . As a result, 36 percent of the C&I segment is sensitive to impacts on the financial services industry. Restrictions On December 31, 2019, $5.2 billion of commercial loans were pledged to secure potential discount window borrowings from the Federal Reserve Bank. As of December 31, 2019 and 2018, FHN pledged all of its first and second lien mortgages, HELOCs, excluding restricted real estate loans, and commercial real estate loans to secure potential borrowings from the FHLB-Cincinnati. Restricted loans secured borrowings associated with consolidated VIEs. See Note 21 - Variable Interest Entities for additional discussion. Acquisition Generally, the fair value for acquired loans is estimated using a discounted cash flow analysis with significant unobservable inputs (Level 3) including adjustments for expected credit losses, prepayment speeds, current market rates for similar loans, and an adjustment for investor-required yield given product-type and various risk characteristics. At acquisition, FHN designated certain loans as PCI with the remaining loans accounted for under ASC 310-20, “Nonrefundable Fees and Other Costs”. Of the loans designated as PCI at acquisition, $4.7 million is held-for-sale. For loans accounted for under ASC 310-20, the difference between each loan’s book value and the estimated fair value at the time of the acquisition will be accreted into interest income over its remaining contractual life and the subsequent accounting and reporting will be similar to a loan in FHN’s originated portfolio. Purchased Credit-Impaired Loans The following table presents a rollforward of the accretable yield for the year ended December 31, 2019 and 2018 : Year Ended December 31 (Dollars in thousands) 2019 2018 Balance, beginning of period $ 13,375 $ 15,623 Accretion (5,792 ) (9,467 ) Adjustment for payoffs (2,438 ) (3,896 ) Adjustment for charge-offs (479 ) (1,115 ) Adjustment for pool excess recovery (a) — (123 ) Increase in accretable yield (b) 5,513 12,791 Disposals (4 ) (240 ) Other (367 ) (198 ) Balance, end of period $ 9,808 $ 13,375 (a) Represents the removal of accretable difference for the remaining loans in a pool which is now in a recovery state. (b) Includes changes in the accretable yield due to both transfers from the nonaccretable difference and the impact of changes in the expected timing of the cash flows. At December 31, 2019 , the ALLL related to PCI loans was $2.0 million compared to $4.0 million at December 31, 2018 . Net charge-offs related to PCI loans during 2019 were $ 5.8 million , compared to $ 6.7 million in 2018. The loan loss provision expense related to PCI loans during 2019 was $1.3 million , compared to $4.8 million during 2018. The following table reflects the outstanding principal balance and carrying amounts of the acquired PCI loans as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 (Dollars in thousands) Carrying value Unpaid balance Carrying value Unpaid balance Commercial, financial and industrial $ 24,973 $ 25,938 $ 38,873 $ 44,259 Commercial real estate 5,078 5,466 15,197 17,232 Consumer real estate 23,681 26,245 30,723 34,820 Credit card and other 489 567 1,627 1,879 Total $ 54,221 $ 58,216 $ 86,420 $ 98,190 Impaired Loans The following tables provide information at December 31, 2019 and 2018 , by class related to individually impaired loans and consumer TDRs, regardless of accrual status. Recorded investment is defined as the amount of the investment in a loan, excluding any valuation allowance but including any direct write-down of the investment. For purposes of this disclosure, PCI loans and the TRUPS valuation allowance have been excluded. December 31, 2019 (Dollars in thousands) Recorded Unpaid Related Average Recorded Interest Impaired loans with no related allowance recorded: Commercial: General C&I $ 52,672 $ 63,602 $ — $ 61,382 $ 690 Loans to mortgage companies — — — 9,314 — Income CRE 1,563 1,563 — 1,620 33 Total $ 54,235 $ 65,165 $ — $ 72,316 $ 723 Consumer: HELOC (a) $ 4,940 $ 10,438 $ — $ 6,582 $ — R/E installment loans (a) 5,329 6,105 — 5,335 — Permanent mortgage (a) 2,264 3,949 — 3,017 — Total $ 12,533 $ 20,492 $ — $ 14,934 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 29,766 $ 31,536 $ 6,196 $ 14,328 $ 4 TRUPS — — — 2,445 — Income CRE — — — 221 9 Total $ 29,766 $ 31,536 $ 6,196 $ 16,994 $ 13 Consumer: HELOC $ 55,522 $ 59,122 $ 7,016 $ 61,294 $ 1,868 R/E installment loans 34,862 35,780 4,521 40,181 1,016 Permanent mortgage 59,329 68,341 7,761 63,630 2,149 Credit card & other 653 653 422 694 18 Total $ 150,366 $ 163,896 $ 19,720 $ 165,799 $ 5,051 Total commercial $ 84,001 $ 96,701 $ 6,196 $ 89,310 $ 736 Total consumer $ 162,899 $ 184,388 $ 19,720 $ 180,733 $ 5,051 Total impaired loans $ 246,900 $ 281,089 $ 25,916 $ 270,043 $ 5,787 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance. December 31, 2018 (Dollars in thousands) Recorded Unpaid Related Average Interest Impaired loans with no related allowance recorded: Commercial: General C&I $ 42,902 $ 45,387 $ — $ 24,186 $ 757 Income CRE 1,589 1,589 — 1,434 51 Residential CRE — — — 374 — Total $ 44,491 $ 46,976 $ — $ 25,994 $ 808 Consumer: HELOC (a) $ 8,645 $ 16,648 $ — $ 8,723 $ — R/E installment loans (a) 4,314 4,796 — 4,300 — Permanent mortgage (a) 3,601 6,003 — 4,392 — Total $ 16,560 $ 27,447 $ — $ 17,415 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 2,802 $ 2,802 $ 149 $ 16,011 $ — TRUPS 2,888 3,700 925 2,981 — Income CRE 377 377 — 348 10 Residential CRE — — — 99 — Total $ 6,067 $ 6,879 $ 1,074 $ 19,439 $ 10 Consumer: HELOC $ 66,482 $ 69,610 $ 11,241 $ 69,535 $ 2,273 R/E installment loans 38,993 39,851 6,743 40,118 1,024 Permanent mortgage 67,245 78,010 9,419 73,259 2,290 Credit card & other 695 695 337 626 14 Total $ 173,415 $ 188,166 $ 27,740 $ 183,538 $ 5,601 Total commercial $ 50,558 $ 53,855 $ 1,074 $ 45,433 $ 818 Total consumer $ 189,975 $ 215,613 $ 27,740 $ 200,953 $ 5,601 Total impaired loans $ 240,533 $ 269,468 $ 28,814 $ 246,386 $ 6,419 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance. Asset Quality Indicators FHN employs a dual grade commercial risk grading methodology to assign an estimate for the probability of default (“PD”) and the loss given default (“LGD”) for each commercial loan using factors specific to various industry, portfolio, or product segments that result in a rank ordering of risk and the assignment of grades PD 1 to PD 16 . This credit grading system is intended to identify and measure the credit quality of the loan portfolio by analyzing the migration of loans between grading categories. It is also integral to the estimation methodology utilized in determining the allowance for loan losses since an allowance is established for pools of commercial loans based on the credit grade assigned. Each PD grade corresponds to an estimated one-year default probability percentage; a PD 1 has the lowest expected default probability, and probabilities increase as grades progress down the scale. PD 1 through PD 12 are “pass” grades. PD grades 13 - 16 correspond to the regulatory-defined categories of special mention ( 13 ), substandard ( 14 ), doubtful ( 15 ), and loss ( 16 ). Pass loan grades are required to be reassessed annually or earlier whenever there has been a material change in the financial condition of the borrower or risk characteristics of the relationship. All commercial loans over $1 million and certain commercial loans over $500,000 that are graded 13 or worse are reassessed on a quarterly basis. Loan grading discipline is regularly reviewed internally by Credit Assurance Services to determine if the process continues to result in accurate loan grading across the portfolio. FHN may utilize availability of guarantors/sponsors to support lending decisions during the credit underwriting process and when determining the assignment of internal loan grades. LGD grades are assigned based on a scale of 1 - 12 and represent FHN’s expected recovery based on collateral type in the event a loan defaults. See Note 5 – Allowance for Loan Losses for further discussion on the credit grading system. The following tables provide the balances of commercial loan portfolio classes with associated allowance, disaggregated by PD grade as of December 31, 2019 and 2018 : December 31, 2019 (Dollars in thousands) General C&I Loans to Mortgage Companies TRUPS (a) Income CRE Residential CRE Total Percentage of Total Allowance for Loan Losses PD Grade: 1 $ 696,040 $ — $ — $ 1,848 $ — $ 697,888 3 % $ 69 2 767,048 — — 48,906 38 815,992 4 165 3 743,123 877,210 3,314 474,067 806 2,098,520 9 274 4 1,237,772 692,971 46,375 680,223 477 2,657,818 11 738 5 1,986,761 670,402 72,512 993,628 1,700 3,725,003 15 8,265 6 2,511,290 1,410,387 27,263 717,062 17,027 4,683,029 19 12,054 7 2,708,707 509,616 18,378 641,345 30,925 3,908,971 16 20,409 8 1,743,364 136,771 — 269,407 16,699 2,166,241 9 22,514 9 1,101,873 77,139 31,909 169,586 13,007 1,393,514 6 17,484 10 563,635 21,229 18,536 59,592 2,153 665,145 3 10,197 11 495,140 — — 81,682 2,302 579,124 2 13,454 12 262,906 15,158 — 28,807 1,074 307,945 1 8,471 13 232,823 — — 32,966 1,126 266,915 1 8,142 14,15,16 263,076 — — 43,400 626 307,102 1 29,318 Collectively evaluated for impairment 15,313,558 4,410,883 218,287 4,242,519 87,960 24,273,207 100 151,554 Individually evaluated for impairment 82,438 — — 1,563 — 84,001 — 6,196 Purchased credit-impaired loans 25,925 — — 4,155 820 30,900 — 848 Total commercial loans $ 15,421,921 $ 4,410,883 $ 218,287 $ 4,248,237 $ 88,780 $ 24,388,108 100 % $ 158,598 (a) Balances presented net of a $ 19.1 million valuation allowance. December 31, 2018 (Dollars in thousands) General C&I Loans to Mortgage Companies TRUPS (a) Income CRE Residential CRE Total Percentage of Total Allowance for Loan Losses PD Grade: 1 $ 610,177 $ — $ — $ 12,586 $ — $ 622,763 3 % $ 100 2 835,776 — — 1,688 29 837,493 4 274 3 782,362 716,971 — 289,594 147 1,789,074 9 315 4 1,223,092 394,862 43,220 563,243 — 2,224,417 11 686 5 1,920,034 277,814 77,751 798,509 14,150 3,088,258 15 8,919 6 1,722,136 365,341 45,609 657,628 33,759 2,824,473 14 8,141 7 2,690,784 96,603 11,446 538,909 26,135 3,363,877 16 16,906 8 1,337,113 53,224 — 265,901 20,320 1,676,558 8 18,545 9 1,472,852 96,292 45,117 455,184 29,849 2,099,294 10 15,454 10 490,795 13,260 18,536 60,803 3,911 587,305 3 8,675 11 311,967 — — 66,986 788 379,741 2 7,973 12 244,867 9,379 — 82,574 5,717 342,537 2 6,972 13 285,987 — 5,786 55,408 251 347,432 2 10,094 14,15,16 224,853 — — 28,835 837 254,525 1 23,307 Collectively evaluated for impairment 14,152,795 2,023,746 247,465 3,877,848 135,893 20,437,747 100 126,361 Individually evaluated for impairment 45,704 — 2,888 1,966 — 50,558 — 1,074 Purchased credit-impaired loans 41,730 — — 12,730 2,433 56,893 — 2,823 Total commercial loans $ 14,240,229 $ 2,023,746 $ 250,353 $ 3,892,544 $ 138,326 $ 20,545,198 100 % $ 130,258 (a) Balances presented net of a $20.2 million valuation allowance. In 3Q18, FHN sold $55.5 million of TRUPS loans with a $5.0 million valuation allowance. Upon sale, a gain of $3.8 million was recognized in the Non-Strategic segment within Fixed Income in the Consolidated Statement of Income. An additional TRUPS loan with a principal balance of $3.0 million and a valuation of $.3 million was paid off in fourth quarter 2018. The consumer portfolio is comprised primarily of smaller-balance loans which are very similar in nature in that most are standard products and are backed by residential real estate. Because of the similarities of consumer loan-types, FHN is able to utilize the Fair Isaac Corporation (“FICO”) score, among other attributes, to assess the credit quality of consumer borrowers. FICO scores are refreshed on a quarterly basis in an attempt to reflect the recent risk profile of the borrowers. Accruing delinquency amounts are indicators of asset quality within the credit card and other consumer portfolio. The following table reflects the percentage of balances outstanding by average, refreshed FICO scores for the HELOC, real estate installment, and permanent mortgage classes of loans as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 HELOC R/E Installment Loans Permanent Mortgage HELOC R/E Installment Loans Permanent Mortgage FICO score 740 or greater 62.0 % 72.9 % 44.8 % 61.4 % 71.3 % 51.8 % FICO score 720-739 8.6 8.3 9.7 8.5 8.8 7.6 FICO score 700-719 7.6 6.1 12.3 7.6 7.0 10.6 FICO score 660-699 10.8 7.7 16.3 10.9 7.6 14.7 FICO score 620-659 4.7 2.6 9.7 5.1 2.8 6.5 FICO score less than 620 (a) 6.3 2.4 7.2 6.5 2.5 8.8 Total 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % (a) For this group, a majority of the loan balances had FICO scores at the time of the origination that exceeded 620 but have since deteriorated as the loans have seasoned. Nonaccrual and Past Due Loans The following table reflects accruing and non-accruing loans by class on December 31, 2019 : Accruing Non-Accruing (Dollars in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Accruing Current 30-89 Days Past Due 90+ Days Past Due Total Non- Accruing Total Loans Commercial (C&I): General C&I $ 15,314,292 $ 7,155 $ 237 $ 15,321,684 $ 36,564 $ 14,385 $ 23,363 $ 74,312 $ 15,395,996 Loans to mortgage companies 4,410,883 — — 4,410,883 — — — — 4,410,883 TRUPS (a) 218,287 — — 218,287 — — — — 218,287 Purchased credit-impaired loans 23,840 287 1,798 25,925 — — — — 25,925 Total commercial (C&I) 19,967,302 7,442 2,035 19,976,779 36,564 14,385 23,363 74,312 20,051,091 Commercial real estate: Income CRE 4,242,044 679 — 4,242,723 — 19 1,340 1,359 4,244,082 Residential CRE 87,487 7 — 87,494 — 466 — 466 87,960 Purchased credit-impaired loans 4,752 128 95 4,975 — — — — 4,975 Total commercial real estate 4,334,283 814 95 4,335,192 — 485 1,340 1,825 4,337,017 Consumer real estate: HELOC 1,217,344 9,156 5,669 1,232,169 43,007 4,227 7,472 54,706 1,286,875 R/E installment loans 4,662,783 10,580 5,138 4,678,501 13,001 1,005 2,601 16,607 4,695,108 Purchased credit-impaired loans 18,720 2,770 3,276 24,766 — — — — 24,766 Total consumer real estate 5,898,847 22,506 14,083 5,935,436 56,008 5,232 10,073 71,313 6,006,749 Permanent mortgage 149,663 2,314 4,032 156,009 7,709 71 6,601 14,381 170,390 Credit card & other: Credit card 198,917 1,076 1,178 201,171 — — — — 201,171 Other 291,700 1,802 337 293,839 101 44 189 334 294,173 Purchased credit-impaired loans 323 98 99 520 — — — — 520 Total credit card & other 490,940 2,976 1,614 495,530 101 44 189 334 495,864 Total loans, net of unearned income $ 30,841,035 $ 36,052 $ 21,859 $ 30,898,946 $ 100,382 $ 20,217 $ 41,566 $ 162,165 $ 31,061,111 (a) TRUPS is presented net of the valuation allowance of $ 19.1 million . The following table reflects accruing and non-accruing loans by class on December 31, 2018 : Accruing Non-Accruing (Dollars in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Accruing Current 30-89 Days Past Due 90+ Days Past Due Total Non- Accruing Total Loans Commercial (C&I): General C&I $ 14,153,275 $ 8,234 $ 102 $ 14,161,611 $ 26,325 $ 5,537 $ 5,026 $ 36,888 $ 14,198,499 Loans to mortgage companies 2,023,746 — — 2,023,746 — — — — 2,023,746 TRUPS (a) 247,465 — — 247,465 — — 2,888 2,888 250,353 Purchased credit-impaired loans 39,433 624 1,673 41,730 — — — — 41,730 Total commercial (C&I) 16,463,919 8,858 1,775 16,474,552 26,325 5,537 7,914 39,776 16,514,328 Commercial real estate: Income CRE 3,876,229 626 — 3,876,855 30 — 2,929 2,959 3,879,814 Residential CRE 135,861 — — 135,861 32 — — 32 135,893 Purchased credit-impaired loans 13,308 103 1,752 15,163 — — — — 15,163 Total commercial real estate 4,025,398 729 1,752 4,027,879 62 — 2,929 2,991 4,030,870 Consumer real estate: HELOC 1,443,651 11,653 10,129 1,465,433 49,009 3,314 8,781 61,104 1,526,537 R/E installment loans 4,652,658 10,470 6,497 4,669,625 15,146 1,924 4,474 21,544 4,691,169 Purchased credit-impaired loans 24,096 2,094 5,620 31,810 — — — — 31,810 Total consumer real estate 6,120,405 24,217 22,246 6,166,868 64,155 5,238 13,255 82,648 6,249,516 Permanent mortgage 193,591 2,585 4,562 200,738 11,227 996 9,487 21,710 222,448 Credit card & other: Credit card 188,009 2,133 1,203 191,345 — — — — 191,345 Other 320,551 3,570 526 324,647 110 60 454 624 325,271 Purchased credit-impaired loans 746 611 397 1,754 — — — — 1,754 Total credit card & other 509,306 6,314 2,126 517,746 110 60 454 624 518,370 Total loans, net of unearned income $ 27,312,619 $ 42,703 $ 32,461 $ 27,387,783 $ 101,879 $ 11,831 $ 34,039 $ 147,749 $ 27,535,532 (a) TRUPS is presented net of the valuation allowance of $20.2 million . Troubled Debt Restructurings As part of FHN’s ongoing risk management practices, FHN attempts to work with borrowers when necessary to extend or modify loan terms to better align with their current ability to repay. Extensions and modifications to loans are made in accordance with internal policies and guidelines which conform to regulatory guidance. Each occurrence is unique to the borrower and is evaluated separately. A modification is classified as a TDR if the borrower is experiencing financial difficulty and it is determined that FHN has granted a concession to the borrower. FHN may determine that a borrower is experiencing financial difficulty if the borrower is currently in default on any of its debt, or if it is probable that a borrower may default in the foreseeable future. Many aspects of a borrower’s financial situation are assessed when determining whether they are experiencing financial difficulty. Concessions could include extension of the maturity date, reductions of the interest rate (which may make the rate lower than current market for a new loan with similar risk), reduction or forgiveness of accrued interest, or principal forgiveness. The assessments of whether a borrower is experiencing (or is likely to experience) financial difficulty, and whether a concession has been granted, are subjective in nature and management’s judgment is required when determining whether a modification is classified as a TDR. For all classes within the commercial portfolio segment, TDRs are typically modified through forbearance agreements (generally 6 to 12 months ). Forbearance agreements could include reduced interest rates, reduced payments, release of guarantor, or entering into short sale agreements. FHN’s proprietary modification programs for consumer loans are generally structured using parameters of U.S. government-sponsored programs such as the former Home Affordable Modification Program (“HAMP”). Within the HELOC and R/E installment loans classes of the consumer portfolio segment, TDRs are typically modified by reducing the interest rate (in increments of 25 basis points to a minimum of 1 percent for up to 5 years ) and a possible maturity date extension to reach an affordable housing debt-to-income ratio. After 5 years , the interest rate generally returns to the original interest rate prior to modification; for certain modifications, the modified interest rate increases 2 percent per year until the original interest rate prior to modification is achieved. Permanent mortgage TDRs are typically modified by reducing the interest rate (in increments of 25 basis points to a minimum of 2 percent for up to 5 years ) and a possible maturity date extension to reach an affordable housing debt-to-income ratio. After 5 years , the interest rate steps up 1 percent every year until it reaches the Federal Home Loan Mortgage Corporation Weekly Survey Rate cap. Contractual maturities may be extended to 40 years on permanent mortgages and to 30 years for consumer real estate loans. Within the credit card class of the consumer portfolio segment, TDRs are typically modified through either a short-term credit card hardship program or a longer-term credit card workout program. In the credit card hardship program, borrowers may be granted rate and payment reductions for 6 months to 1 year . In the credit card workout program, customers are granted a rate reduction to 0 percent and term extensions for up to 5 years to pay off the remaining balance. Despite the absence of a loan modification, the discharge of personal liability through bankruptcy proceedings is considered a concession. As a result, FHN classifies all non-reaffirmed residential real estate loans discharged in Chapter 7 bankruptcy as nonaccruing TDRs. On December 31, 2019 and 2018 , FHN had $206.3 million and $228.2 million of portfolio loans classified as TDRs, respectively. For TDRs in the loan portfolio, FHN had loan loss reserves of $19.7 million , or 10 percent as of December 31, 2019 , and $27.7 million , or 12 percent as of December 31, 2018 . Additionally, $51.1 million and $57.8 million of loans held-for-sale as of December 31, 2019 and 2018 , respectively, were classified as TDRs. The following tables reflect portfolio loans that were classified as TDRs during the year ended December 31, 2019 and 2018 : 2019 2018 (Dollars in thousands) Number Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Commercial (C&I): General C&I 4 $ 14,179 $ 14,101 9 $ 27,639 $ 27,190 Total commercial (C&I) 4 14,179 14,101 9 27,639 27,190 Commercial real estate: Income CRE — — — 4 643 637 Total commercial real estate — — — 4 643 637 Consumer real estate: HELOC 74 8,028 7,946 103 9,406 9,283 R/E installment loans 96 10,408 10,445 92 8,077 7,848 Total consumer real estate 170 18,436 18,391 195 17,483 17,131 Permanent mortgage 8 1,771 1,798 8 1,001 1,184 Credit card & other 85 379 358 132 604 570 Total troubled debt restructurings 267 $ 34,765 $ 34,648 348 $ 47,370 $ 46,712 The following tables present TDRs which re-defaulted during 2019 and 2018 , and as to which the modification occurred 12 months or less prior to the re-default. For purposes of this disclosure, FHN generally defines payment default as 30 or more days past due. 2019 2018 (Dollars in thousands) Number Recorded Investment Number Recorded Investment Commercial (C&I): General C&I — $ — 2 $ 579 Total commercial (C&I) — — 2 579 Consumer real estate: HELOC 7 1,141 6 239 R/E installment loans 3 98 2 146 Total consumer real estate 10 1,239 8 385 Permanent mortgage 1 7 6 749 Credit card & other 32 115 49 239 Total troubled debt restructurings 43 $ 1,361 65 $ 1,952

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses As discussed in Note 1 - Summary of Significant Accounting Polices, the ALLL includes the following components: reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer loans, both determined in accordance with ASC 450-20-50, and to a lesser extent, reserves determined in accordance with ASC 310-10-35 for loans determined by management to be individually impaired and an allowance associated with PCI loans. For commercial loans, ASC 450-20-50 reserves are established using historical net loss factors by grade level, loan product, and business segment. The ALLL for smaller-balance homogeneous consumer loans is determined based on pools of similar loan types that have similar credit risk characteristics. ASC 450-20-50 reserves for the consumer portfolio are determined using segmented roll-rate models that incorporate various factors including historical delinquency trends, experienced loss frequencies, and experienced loss severities. Generally, reserves for consumer loans reflect inherent losses in the portfolio that are expected to be recognized over the following twelve months. The historical net loss factors for both commercial and consumer ASC 450-20-50 reserve models are subject to qualitative adjustments by management to reflect current events, trends, and conditions (including economic considerations and trends), which are not fully captured in the historical net loss factors. The pace of the economic recovery, performance of the housing market, unemployment levels, labor participation rate, the regulatory environment, regulatory guidance, and portfolio segment-specific trends, are examples of additional factors considered by management in determining the ALLL. Additionally, management considers the inherent uncertainty of quantitative models that are driven by historical loss data. Management evaluates the periods of historical losses that are the basis for the loss rates used in the quantitative models and selects historical loss periods that are believed to be the most reflective of losses inherent in the loan portfolio as of the balance sheet date. Management also periodically reviews an analysis of the loss emergence period which is the amount of time it takes for a loss to be confirmed (initial charge-off) after a loss event has occurred. FHN performs extensive studies as it relates to the historical loss periods used in the model and the loss emergence period and model assumptions are adjusted accordingly. Impairment related to individually impaired loans is measured in accordance with ASC 310-10. For all commercial portfolio segments, commercial TDRs and other individually impaired commercial loans are measured based on the present value of expected future payments discounted at the loan’s effective interest rate (“the DCF method”), observable market prices, or for loans that are solely dependent on the collateral for repayment, the net realizable value (collateral value less estimated costs to sell). Impaired loans also include consumer TDRs. Generally, the allowance for TDRs in all consumer portfolio segments is determined by estimating the expected future cash flows using the modified interest rate (if an interest rate concession), incorporating payoff and net charge-off rates specific to the TDRs within the portfolio segment being assessed, and discounted using the pre-modification interest rate. The discount rates of variable rate TDRs are adjusted to reflect changes in the interest rate index to which the rates are tied. The discounted cash flows are then compared to the outstanding principal balance in order to determine required reserves. Residential real estate loans discharged through bankruptcy are collateral-dependent and are charged down to net realizable value (collateral value less estimated costs to sell). The following table provides a rollforward of the allowance for loan losses by portfolio segment for December 31, 2019 , 2018 and 2017: (Dollars in thousands) C&I (a) Commercial Real Estate (a) Consumer Real Estate Permanent Mortgage Credit Card and Other Total Balance as of January 1, 2019 $ 98,947 $ 31,311 $ 26,439 $ 11,000 $ 12,727 $ 180,424 Charge-offs (33,778 ) (1,181 ) (7,781 ) (393 ) (15,600 ) (58,733 ) Recoveries 6,744 489 17,000 3,148 4,235 31,616 Provision/(provision credit) for loan losses 50,573 5,493 (16,034 ) (4,936 ) 11,904 47,000 Balance as of December 31, 2019 122,486 36,112 19,624 8,819 13,266 200,307 Allowance - individually evaluated for impairment 6,196 — 11,537 7,761 422 25,916 Allowance - collectively evaluated for impairment 115,442 36,112 7,001 1,058 12,813 172,426 Allowance - purchased credit-impaired loans 848 — 1,086 — 31 1,965 Loans, net of unearned as of December 31, 2019: Individually evaluated for impairment 82,438 1,563 100,653 61,593 653 246,900 Collectively evaluated for impairment 19,942,728 4,330,479 5,881,330 108,797 494,691 30,758,025 Purchased credit-impaired loans 25,925 4,975 24,766 — 520 56,186 Total loans, net of unearned income $ 20,051,091 $ 4,337,017 $ 6,006,749 $ 170,390 $ 495,864 $ 31,061,111 Balance as of January 1, 2018 $ 98,211 $ 28,427 $ 39,823 $ 13,113 $ 9,981 $ 189,555 Charge-offs (15,492 ) (783 ) (9,357 ) (477 ) (19,688 ) (45,797 ) Recoveries 4,201 339 19,666 1,421 4,039 29,666 Provision/(provision credit) for loan losses 12,027 3,328 (23,693 ) (3,057 ) 18,395 7,000 Balance as of December 31, 2018 98,947 31,311 26,439 11,000 12,727 180,424 Allowance - individually evaluated for impairment 1,074 — 17,984 9,419 337 28,814 Allowance - collectively evaluated for impairment 95,050 31,311 7,368 1,581 12,263 147,573 Allowance - purchased credit-impaired loans 2,823 — 1,087 — 127 4,037 Loans, net of unearned as of December 31, 2018: Individually evaluated for impairment 48,592 1,966 118,434 70,846 695 240,533 Collectively evaluated for impairment 16,424,006 4,013,741 6,099,272 151,602 515,921 27,204,542 Purchased credit-impaired loans 41,730 15,163 31,810 — 1,754 90,457 Total loans, net of unearned income $ 16,514,328 $ 4,030,870 $ 6,249,516 $ 222,448 $ 518,370 $ 27,535,532 Balance as of January 1, 2017 $ 89,398 $ 33,852 $ 51,424 $ 15,222 $ 12,172 $ 202,068 Charge-offs (17,657 ) (195 ) (13,156 ) (2,179 ) (13,207 ) (46,394 ) Recoveries 4,568 966 22,723 2,509 3,115 33,881 Provision/(provision credit) for loan losses 21,902 (6,196 ) (21,168 ) (2,439 ) 7,901 — Balance as of December 31, 2017 98,211 28,427 39,823 13,113 9,981 189,555 Allowance - individually evaluated for impairment 6,044 132 23,175 12,105 311 41,767 Allowance - collectively evaluated for impairment 89,358 28,291 16,293 1,008 9,670 144,620 Allowance - purchased credit-impaired loans 2,809 4 355 — — 3,168 Loans, net of unearned as of December 31, 2017 Individually evaluated for impairment 43,024 2,407 128,895 84,794 593 259,713 Collectively evaluated for impairment 15,909,110 4,181,908 6,311,817 203,026 613,806 27,219,667 Purchased credit-impaired loans 105,139 30,380 38,530 — 5,500 179,549 Total loans, net of unearned income $ 16,057,273 $ 4,214,695 $ 6,479,242 $ 287,820 $ 619,899 $ 27,658,929 a) In third quarter 2019, FHN corrected a previous mis-classification of commercial loans and reclassified approximately $410 million of market investor CRE loans from the C&I portfolio to the CRE portfolio. These loans were identified during an internal review and assessment by management of certain loan populations, a portion of which relate to loans acquired as part of the Capital Bank merger. The reclassification of these loan balances between regional banking portfolios did not have an impact on FHN’s consolidated period-end or average balance sheet and had an immaterial effect on the allowance for loan losses. No adjustments were made to prior periods as the impact of the reclassification, including the effect on the allowance for loan losses was deemed to be immaterial in all periods.

Premises, Equipment, and Leases

Premises, Equipment, and Leases	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Premises, Equipment, and Leases	Premises, Equipment, and Leases Premises and equipment on December 31 are summarized below: (Dollars in thousands) 2019 2018 Land $ 98,804 $ 107,864 Buildings 428,695 461,665 Leasehold improvements 50,032 30,230 Furniture, fixtures, and equipment 205,493 196,469 Fixed assets held-for-sale (a) 9,719 19,617 Premises and equipment, at cost 792,743 815,845 Less accumulated depreciation and amortization 337,737 321,804 Premises and equipment, net $ 455,006 $ 494,041 (a) Primarily comprised of land and buildings. In 2019 and 2018 , FHN recognized $ 26.9 million and $3.9 million , respectively, of fixed asset impairments and lease abandonment charges related to branch closures which are included in All other expenses on the Consolidated Statements of Income. In 2018, $1.5 million of impairment recoveries were recorded upon disposition of the associated properties. In 2019 and 2018 , FHN had net gains of $ 2.3 million and $4.3 million , respectively, related to the sales of bank branches which are included in All other income and commissions on the Consolidated Statements of Income. FHN has operating, financing, and short-term leases for branch locations, corporate offices and certain equipment. Substantially all of these leases are classified as operating leases. The following table provides a detail of the classification of FHN's right-of-use ("ROU") assets and lease liabilities included in the Consolidated Statement of Conditions. (Dollars in thousands) December 31, 2019 Lease Right-of-Use Assets: Classification Operating lease right-of use assets Other assets $ 201,873 Finance lease right-of use assets Other assets 2,037 Total Lease Right-of Use Assets $ 203,910 Lease Liabilities: Operating lease liabilities Other liabilities $ 223,128 Finance lease liabilities Other liabilities 2,708 Total Lease Liabilities $ 225,836 The calculated amount of the ROU assets and lease liabilities in the table above are impacted by the length of the lease term and the discount rate used to present value the minimum lease payments. The following table details the weighted average remaining lease term and discount rate for FHN's operating and finance leases as of December 31, 2019 . Weighted Average Remaining Lease Terms Operating leases 12.36 years Finance leases 9.61 years Weighted Average Discount Rate Operating leases 3.24 % Finance leases 4.77 % The following table provides a detail of the components of lease expense and other lease information for the year ended December 31, 2019 : (Dollars in thousands) 2019 Lease cost Operating lease cost $ 24,797 Finance lease cost: Amortization of right-of-use assets 114 Interest on lease liabilities 135 Short-term lease cost 98 Sublease income (366 ) Total lease cost $ 24,778 Other information (Gain)/loss on right-of-use asset impairment-Operating leases $ 2,551 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases 23,053 Operating cash flows from finance leases 135 Financing cash flows from finance leases 142 Right-of-use assets obtained in exchange for new lease obligations: Operating leases 47,735 Finance leases 1,475 The following table provides a detail of the maturities of FHN's operating and finance lease liabilities as of December 31, 2019 : (Dollars in thousands) December 31, 2019 2020 $ 26,594 2021 24,627 2022 23,553 2023 22,687 2024 22,224 2025 and after 156,524 Total lease payments 276,209 Less lease liability interest (50,373 ) Total $ 225,836 FHN had aggregate undiscounted contractual obligations totaling $2.6 million for lease arrangements that have not commenced. Payments under these arrangements are expected to occur from 2020 through 2030. Minimum future lease payments for noncancelable operating leases, primarily on premises, on December 31, 2018 are shown below. (Dollars in thousands) December 31, 2018 2019 $ 27,524 2020 24,722 2021 20,954 2022 16,518 2023 13,174 2024 and after 42,370 Total minimum lease payments $ 145,262

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The following is a summary of other intangible assets included in the Consolidated Statements of Condition: December 31, 2019 December 31, 2018 (Dollars in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Value Gross Carrying Amount Accumulated Amortization Net Carrying Value Core deposit intangibles $ 157,150 $ (47,372 ) $ 109,778 $ 157,150 $ (28,150 ) $ 129,000 Customer relationships 77,865 (60,150 ) 17,715 77,865 (55,597 ) 22,268 Other (a) 5,622 (2,915 ) 2,707 5,622 (1,856 ) 3,766 Total $ 240,637 $ (110,437 ) $ 130,200 $ 240,637 $ (85,603 ) $ 155,034 (a) Balance primarily includes noncompete covenants, as well as $ .3 million related to state banking licenses not subject to amortization. Amortization expense was $24.8 million , $25.9 million , and $8.7 million for the years ended December 31, 2019 , 2018 and 2017, respectively. As of December 31, 2019 the estimated aggregated amortization expense is expected to be: (Dollars in thousands) Year Amortization 2020 $ 21,159 2021 19,547 2022 17,412 2023 16,117 2024 14,679 Gross goodwill, accumulated impairments, and accumulated divestiture related write-offs were determined beginning January 1, 2002, when a change in accounting requirements resulted in goodwill being assessed for impairment rather than being amortized. Gross goodwill of $200.0 million with accumulated impairments and accumulated divestiture-related write-offs of $114.1 million and $85.9 million , respectively, were previously allocated to the non-strategic segment, resulting in $0 net goodwill allocated to the non-strategic segment as of December 31, 2019 , 2018 and 2017. The regional banking and fixed income segments do not have any accumulated impairments or divestiture related write-offs. The following is a summary of goodwill by reportable segment included in the Consolidated Statements of Condition as of December 31, 2019 , 2018 and 2017. (Dollars in thousands) Regional Banking Fixed Income Total December 31, 2016 $ 93,367 $ 98,004 $ 191,371 Additions (a) 1,150,518 44,964 1,195,482 December 31, 2017 $ 1,243,885 $ 142,968 $ 1,386,853 Additions (a) 45,934 — 45,934 December 31, 2018 $ 1,289,819 $ 142,968 $ 1,432,787 Additions — — — December 31, 2019 $ 1,289,819 $ 142,968 $ 1,432,787

Time Deposit Maturities

Time Deposit Maturities	12 Months Ended
	Dec. 31, 2019
Maturities of Time Deposits [Abstract]
Time Deposit Maturities	Time Deposit Maturities Following is a table of maturities for time deposits outstanding on December 31, 2019 , which include Certificates of deposit under $100,000, Other time, and Certificates of deposit $100,000 and more. Certificates of deposit in increments of $100,000 or more totaled $2.2 billion on December 31, 2019 , of this amount $.9 billion represents Certificates of deposit of $250,000 and more. Time deposits are included in Interest-bearing deposits on the Consolidated Statements of Condition. (Dollars in thousands) 2020 $ 2,824,792 2021 259,290 2022 382,508 2023 90,034 2024 43,025 2025 and after 18,688 Total $ 3,618,337

Short-term borrowings

Short-term borrowings	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Short-term borrowings	Short-Term Borrowings Short-term borrowings include federal funds purchased and securities sold under agreements to repurchase, trading liabilities, and other borrowed funds. Federal funds purchased and securities sold under agreements to repurchase generally have maturities of less than 90 days . Trading liabilities, which represent short positions in securities, are generally held for less than 90 days . Other short-term borrowings have original maturities of one year or less. On December 31, 2019 , fixed income trading securities with a fair value of $41.3 million were pledged to secure other short-term borrowings. The detail of short-term borrowings for the years 2019 , 2018 and 2017 is presented in the following table: (Dollars in thousands) Federal Funds Purchased Securities Sold Under Agreements to Repurchase Trading Liabilities Other Short-term Borrowings 2019 Average balance $ 737,715 $ 701,164 $ 503,302 $ 538,249 Year-end balance 548,344 716,925 505,581 2,253,045 Maximum month-end outstanding 1,281,853 772,092 754,220 2,276,139 Average rate for the year 2.08 % 1.89 % 2.48 % 2.34 % Average rate at year-end 1.55 1.72 2.07 2.14 2018 Average balance $ 405,110 $ 713,841 $ 682,943 $ 1,046,585 Year-end balance 256,567 762,592 335,380 114,764 Maximum month-end outstanding 503,138 891,425 890,717 2,229,155 Average rate for the year 1.89 % 1.40 % 2.83 % 1.82 % Average rate at year-end 2.50 1.66 3.21 2.48 2017 Average balance $ 447,137 $ 578,666 $ 685,891 $ 554,502 Year-end balance 399,820 656,602 638,515 2,626,213 Maximum month-end outstanding 568,490 743,684 896,943 2,626,213 Average rate for the year 1.06 % 0.72 % 2.26 % 1.28 % Average rate at year-end 1.48 0.64 2.22 1.44

Term Borrowings

Term Borrowings	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Term Borrowings	Term Borrowings The following table presents information pertaining to Term Borrowings reported on FHN’s Consolidated Statements of Condition on December 31 : ( Dollars in thousands ) 2019 2018 First Horizon Bank: Senior capital notes (a) Maturity date – December 1, 2019 – 2.95% $ — $ 395,872 Other collateralized borrowings – Maturity date – December 22, 2037 2.19% on December 31, 2019 and 3.09% on December 31, 2018 (b) 80,908 76,642 Other collateralized borrowings - SBA loans (c) 21,975 16,607 First Horizon National Corporation: Senior capital notes (a) Maturity date – December 15, 2020 – 3.50% 497,656 486,739 Junior subordinated debentures (d) Maturity date - June 28, 2035 - 3.57% on December 31, 2019 and 4.47% on December 31, 2018 2,752 2,730 Maturity date - December 15, 2035 - 3.26% on December 31, 2019 and 4.16% on December 31, 2018 17,642 17,456 Maturity date - March 15, 2036 - 3.29% on December 31, 2019 and 4.19% on December 31, 2018 8,847 8,757 Maturity date - March 15, 2036 - 3.43% on December 31, 2019 and 4.33% on December 31, 2018 11,692 11,587 Maturity date - June 30, 2036 - 3.28% on December 31, 2019 and 4.12% on December 31, 2018 26,217 25,931 Maturity date - July 7, 2036 - 3.54% on December 31, 2019 and 3.99% on December 31, 2018 17,964 17,803 Maturity date - June 15, 2037 - 3.54% on December 31, 2019 and 4.44% on December 31, 2018 50,681 50,278 Maturity date - September 6, 2037 - 3.32% on December 31, 2019 and 4.17% on December 31, 2018 8,798 8,713 FT Real Estate Securities Company, Inc.: Cumulative preferred stock (e) Maturity date – March 31, 2031 – 9.50% 46,236 46,168 First Horizon ABS Trusts: Other collateralized borrowings (f) (g) Maturity date – October 25, 2034 2.66% on December 31, 2018 — 2,981 First Tennessee New Markets Corporation Investments: Maturity date – August 08, 2036 – 2.38% (f) — 2,699 Total $ 791,368 $ 1,170,963 (a) Changes in the fair value of debt attributable to interest rate risk are hedged. First Horizon Bank early redeemed the senior debt on November 1, 2019. Refer to Note 22 – Derivatives. (b) Secured by trust preferred loans. (c) Collateralized borrowings associated with SBA loan sales that did not meet sales criteria. The loans have remaining terms of 3 to 25 years. These borrowings had a weighted average interest rate of 3.95 percent on December 31, 2019 and 2018, respectively. (d) Acquired in conjunction with the acquisition of CBF. A portion qualifies for Tier 2 capital under the risk-based capital guidelines. (e) A portion qualifies for Tier 2 capital under the risk-based capital guidelines. (f) Debt retired during 2019. See Note 21- Variable Interest Entities for additional information. (g) On December 31, 2018 , borrowings secured by $16.2 million of residential real estate loans. Annual principal repayment requirements as of December 31, 2019 are as follows: ( Dollars in thousands ) 2020 $ 500,000 2021 — 2022 236 2023 — 2024 — 2025 and after 316,661 In conjunction with the acquisition of CBF, FHN acquired junior subordinated debentures with aggregate par values of $212.4 million . Each of these issuances is held by a wholly owned trust that has issued trust preferred securities to external investors and loaned the funds to FHN, as successor to CBF, as junior subordinated debt. The book value for each issuance represents the purchase accounting fair value as of the closing date less accumulated amortization of the associated discount, as applicable. Through various contractual arrangements FHN assumed a full and unconditional guarantee for each trust’s obligations with respect to the securities. While the maturity dates are typically 30 years from the original issuance date, FHN has the option to redeem each of the junior subordinated debentures at par on any future interest payment date, which would trigger redemption of the related trust preferred securities. The junior subordinated debentures are included in the Consolidated Statements of Condition in Term borrowings. A portion of FHN's junior subordinated notes qualify as Tier 2 capital under the risk-based capital guidelines. FHN retired $45.4 million of this debt and the related trust preferred securities in 2018.

Preferred Stock

Preferred Stock	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Preferred Stock	Preferred Stock FHN Preferred Stock On January 31, 2013, FHN issued 1,000 shares having an aggregate liquidation preference of $100 million of Non-Cumulative Perpetual Preferred Stock, Series A for net proceeds of approximately $96 million . Dividends on the Series A Preferred Stock, if declared, accrue and are payable quarterly, in arrears, at a rate of 6.20 percent per annum. For the issuance, FHN issued depositary shares, each of which represents a 1/4000th fractional ownership interest in a share of FHN’s preferred stock. These securities qualify as Tier 1 capital. Subsidiary Preferred Stock In 2000 FT Real Estate Securities Company, Inc. (“FTRESC”), an indirect subsidiary of FHN, issued 50 shares of 9.50 percent Cumulative Preferred Stock, Class B (“Class B Preferred Shares”), with a liquidation preference of $1.0 million per share; of those, 47 shares were issued to nonaffiliates. For all periods presented, these securities are presented in the Consolidated Statements of Condition as Term borrowings. FTRESC is a real estate investment trust (“REIT”) established for the purpose of acquiring, holding, and managing real estate mortgage assets. Dividends on the Class B Preferred Shares are cumulative and are payable semi-annually. The Class B Preferred Shares are mandatorily redeemable on March 31, 2031, and redeemable at the discretion of FTRESC in the event that the Class B Preferred Shares cannot be accounted for as Tier 2 regulatory capital or there is more than an insubstantial risk that dividends paid with respect to the Class B Preferred Shares will not be fully deductible for tax purposes. At December 31, 2019 the Class B Preferred Shares partially qualified as Tier 2 regulatory capital. They are not subject to any sinking fund and are not convertible into any other securities of FTRESC, FHN, or any of its subsidiaries. In the event First Horizon Bank becomes undercapitalized, insolvent, or in danger of becoming undercapitalized, the shares are, however, automatically exchanged at the direction of the Federal banking regulators for preferred stock of First Horizon Bank, having substantially the same terms as the Class B Preferred Shares. Additionally for all periods presented, subsidiaries have also issued $.6 million in aggregate of Cumulative Perpetual Preferred Stock, which has been recognized as Noncontrolling interest on the Consolidated Statements of Condition and which partially qualifies as Tier 2 capital. Other preferred shares are outstanding but are owned by FHN subsidiaries and are eliminated in consolidation. In 2005 First Horizon Bank issued 300,000 shares of Class A Non-Cumulative Perpetual Preferred Stock (“Class A Preferred Stock”) with a liquidation preference of $1,000 per share. Dividends on the Class A Preferred Stock, if declared, accrue and are payable each quarter, in arrears, at a floating rate equal to the greater of the three month LIBOR plus .85 percent or 3.75 percent per annum. These securities qualify fully as Tier 1 capital for First Horizon Bank while for FHN consolidated they qualify partially as Tier 1 capital and partially as Tier 2 capital. On December 31 , 2019 and 2018 , $294.8 million of Class A Preferred Stock was recognized as Noncontrolling interest on the Consolidated Statements of Condition.

Regulatory Capital and Restrict

Regulatory Capital and Restrictions	12 Months Ended
	Dec. 31, 2019
Brokers and Dealers [Abstract]
Regulatory Capital and Restrictions	Regulatory Capital and Restrictions Regulatory Capital. FHN and First Horizon Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on FHN’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, specific capital guidelines that involve quantitative measures of assets, liabilities, and certain derivatives as calculated under regulatory accounting practices must be met. Capital amounts and classification are also subject to qualitative judgment by the regulators such as capital components, asset risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require FHN and First Horizon Bank to maintain minimum amounts and ratios of Total, Tier 1, and Common Equity Tier 1 capital to risk-weighted assets, and of Tier 1 capital to average assets (“Leverage”). Management believes that, as of December 31, 2019 , FHN and First Horizon Bank met all capital adequacy requirements to which they were subject. The actual capital amounts and ratios of FHN and First Horizon Bank are presented in the table below. (Dollars in thousands) First Horizon National Corporation First Horizon Bank Amount Ratio Amount Ratio On December 31, 2019 Actual: Total Capital $ 4,154,885 11.22 % $ 3,944,613 10.77 % Tier 1 Capital 3,760,450 10.15 3,728,683 10.18 Common Equity Tier 1 3,408,936 9.20 3,433,867 9.38 Leverage 3,760,450 9.04 3,728,683 9.12 Minimum Requirement for Capital Adequacy Purposes: Total Capital 2,963,663 8.00 2,930,159 8.00 Tier 1 Capital 2,222,747 6.00 2,197,620 6.00 Common Equity Tier 1 1,667,060 4.50 1,648,215 4.50 Leverage 1,663,338 4.00 1,634,695 4.00 Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions: Total Capital 3,662,699 10.00 Tier 1 Capital 2,930,159 8.00 Common Equity Tier 1 2,380,755 6.50 Leverage 2,043,368 5.00 On December 31, 2018 Actual: Total Capital $ 3,940,117 11.94 % $ 3,689,180 11.32 % Tier 1 Capital 3,565,373 10.80 3,492,541 10.72 Common Equity Tier 1 3,223,702 9.77 3,197,725 9.81 Leverage 3,565,373 9.09 3,492,541 9.10 Minimum Requirement for Capital Adequacy Purposes: Total Capital 2,640,208 8.00 2,607,406 8.00 Tier 1 Capital 1,980,156 6.00 1,955,555 6.00 Common Equity Tier 1 1,485,117 4.50 1,466,666 4.50 Leverage 1,568,870 4.00 1,535,279 4.00 Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions: Total Capital 3,259,258 10.00 Tier 1 Capital 2,607,406 8.00 Common Equity Tier 1 2,118,518 6.50 Leverage 1,919,099 5.00 Restrictions on cash and due from banks. Under the Federal Reserve Act and Regulation D, First Horizon Bank is required to maintain a certain amount of cash reserves. On December 31 , 2019 and 2018 , First Horizon Bank's net required reserves were $396.1 million and $371.7 million , respectively, after the consideration of $273.7 million in average vault cash. The remaining net reserve requirement for each year was met with Federal Reserve Bank deposits. Vault cash is reflected in Cash and due from banks on the Consolidated Statements of Condition and Federal Reserve Bank deposits are reflected as Interest-bearing cash. Restrictions on dividends. Cash dividends are paid by FHN from its assets, which are mainly provided by dividends from its subsidiaries. Certain regulatory restrictions exist regarding the ability of First Horizon Bank to transfer funds to FHN in the form of cash, dividends, loans, or advances. As of December 31, 2019 , First Horizon Bank had undivided profits of $1.2 billion , of which a limited amount was available for distribution to FHN as dividends without prior regulatory approval. Certain regulatory restrictions exist regarding the ability of First Horizon Bank to transfer funds to FHN in the form of cash, dividends, loans, and advances. At any given time, the pertinent portions of those regulatory restrictions allow First Horizon Bank to declare preferred or common dividends without prior regulatory approval in an amount equal to First Horizon Bank's retained net income for the two most recent completed years plus the current year to date. For any period, First Horizon Bank’s ‘retained net income’ generally is equal to First Horizon Bank’s regulatory net income reduced by the preferred and common dividends declared by First Horizon Bank. Applying the dividend restrictions imposed under applicable federal and state rules, First Horizon Bank’s total amount available for dividends was $331.2 million at January 1, 2020 . First Horizon Bank declared and paid common dividends to the parent company in the amount of $345.0 million in 2019 and $420.0 million in 2018. In January 2020, First Horizon Bank declared and paid a common dividend to the parent company in the amount of $65.0 million . During 2019 and 2018, First Horizon Bank declared and paid dividends on its preferred stock quarterly. Additionally, First Horizon Bank declared preferred dividends in first quarter 2020 payable in April 2020. The payment of cash dividends by FHN and First Horizon Bank may also be affected or limited by other factors, such as the requirement to maintain adequate capital above regulatory guidelines. Beginning January 1, 2019, the ability to pay dividends for both FHN and First Horizon Bank is restricted if capital ratios fall below regulatory minimums for Common Equity Tier 1, Tier 1, Total Capital ratios plus a 2.5 percent capital conservation buffer or 50 basis points above the capital ratios required to be considered well-capitalized. Furthermore, the Federal Reserve generally requires insured banks and bank holding companies only to pay dividends out of current operating earnings. Consequently, the decision of whether FHN will pay future dividends and the amount of dividends will be affected by current operating results. Restrictions on intercompany transactions. Under current Federal banking laws, First Horizon Bank may not enter into covered transactions with any affiliate including the parent company and certain financial subsidiaries in excess of 10 percent of the bank’s capital stock and surplus, as defined, or $426.0 million , on December 31, 2019 . Covered transactions include a loan or extension of credit to an affiliate, a purchase of or an investment in securities issued by an affiliate and the acceptance of securities issued by the affiliate as collateral for any loan or extension of credit. The equity investment, including retained earnings, in certain of a bank’s financial subsidiaries is also treated as a covered transaction. On December 31, 2019, the parent company had covered transactions of $.8 million from First Horizon Bank and two of the bank’s financial subsidiaries, FHN Financial Securities Corp. and First Horizon Advisors, Inc., had covered transactions from First Horizon Bank totaling $390.4 million and $34.7 million , respectively. In addition, the aggregate amount of covered transactions with all affiliates, as defined, is limited to 20 percent of the bank’s capital stock and surplus, as defined, or $851.9 million , on December 31, 2019 . First Horizon Bank’s total covered transactions with all affiliates including the parent company on December 31, 2019 were $425.9 million .

Other Income and Other Expense

Other Income and Other Expense	12 Months Ended
	Dec. 31, 2019
Other Nonoperating Income (Expense) [Abstract]
Other Income and Other Expense	Other Income and Other Expense Following is detail of All other income and commissions and All other expense as presented in the Consolidated Statements of Income: (Dollars in thousands) 2019 2018 2017 All other income and commissions: Other service charges $ 20,986 $ 15,122 $ 12,532 ATM and interchange fees 16,539 13,354 12,425 Deferred compensation (a) 11,223 (3,224 ) 6,322 Mortgage banking 10,055 10,587 4,649 Dividend income (b) 7,186 10,555 — Letter of credit fees 5,582 5,298 4,661 Electronic banking fees 4,927 5,134 5,082 Insurance commissions 2,125 2,096 2,514 Gain/(loss) on extinguishment of debt (c) 58 (15 ) (14,329 ) Other 32,277 16,902 10,061 Total $ 110,958 $ 75,809 $ 43,917 All other expense: Travel and entertainment $ 12,119 $ 16,442 $ 11,462 Other insurance and taxes 10,179 9,684 9,686 Customer relations 9,098 5,583 5,750 Supplies 6,918 6,917 4,106 Employee training and dues 5,141 7,218 5,551 Miscellaneous loan costs 4,128 3,732 2,751 Litigation and regulatory matters 2,923 644 40,517 Non-service components of net periodic pension and post-retirement cost 2,304 5,251 2,144 Tax credit investments 1,809 4,712 3,468 OREO 1,479 2,630 1,006 Repurchase and foreclosure provision/(provision credit) (1,007 ) (1,039 ) (22,527 ) Other 71,039 73,223 48,693 Total $ 126,130 $ 134,997 $ 112,607 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Amounts are driven by market conditions and are mirrored by changes in deferred compensation expense which is included in employee compensation expense. (b) Effective January 1, 2018, FHN adopted ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” and began recording dividend income from FRB and FHLB holdings in Other income. Prior to 2018, these amounts were included in Interest income on the Consolidated Statements of Income. (c)

Components of Other Comprehensi

Components of Other Comprehensive Income/(Loss)	12 Months Ended
	Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Other Comprehensive Income/(Loss)	Components of Other Comprehensive Income/(Loss) The following table provides the changes in accumulated other comprehensive income/(loss) by component, net of tax, for the years ended December 31, 2019 , 2018 , and 2017 : (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of December 31, 2016 $ (17,232 ) $ (1,265 ) $ (229,157 ) $ (247,654 ) Net unrealized gains/(losses) (4,467 ) (2,156 ) (13,377 ) (20,000 ) Amounts reclassified from AOCI (298 ) (2,945 ) 5,618 2,375 Other comprehensive income/(loss) (4,765 ) (5,101 ) (7,759 ) (17,625 ) Balance as of December 31, 2017 (21,997 ) (6,366 ) (236,916 ) (265,279 ) Adjustment to reflect adoption of ASU 2018-02 (4,837 ) (1,398 ) (51,311 ) (57,546 ) Balance as of December 31, 2017, as adjusted (26,834 ) (7,764 ) (288,227 ) (322,825 ) Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12 (5 ) (206 ) — (211 ) Beginning balance, as adjusted (26,839 ) (7,970 ) (288,227 ) (323,036 ) Net unrealized gains/(losses) (48,858 ) (6,284 ) (9,435 ) (64,577 ) Amounts reclassified from AOCI (39 ) 2,142 8,894 10,997 Other comprehensive income/(loss) (48,897 ) (4,142 ) (541 ) (53,580 ) Balance as of December 31, 2018 (75,736 ) (12,112 ) (288,768 ) (376,616 ) Net unrealized gains/(losses) 106,614 11,234 7,208 125,056 Amounts reclassified from AOCI 201 4,105 7,646 11,952 Other comprehensive income/(loss) 106,815 15,339 14,854 137,008 Balance as of December 31, 2019 $ 31,079 $ 3,227 $ (273,914 ) $ (239,608 ) Reclassifications from AOCI, and related tax effects, were as follows: (Dollars in thousands) Details about AOCI 2019 2018 2017 Affected line item in the statement where net income is presented Securities AFS: Realized (gains)/losses on securities AFS $ 267 $ (52 ) $ (483 ) Debt securities gains/(losses), net Tax expense/(benefit) (66 ) 13 185 Provision/(benefit) for income taxes 201 (39 ) (298 ) Cash flow hedges: Realized (gains)/losses on cash flow hedges 5,452 2,845 (4,771 ) Interest and fees on loans Tax expense/(benefit) (1,347 ) (703 ) 1,826 Provision/(benefit) for income taxes 4,105 2,142 (2,945 ) Pension and Postretirement Plans: Amortization of prior service cost and net actuarial gain/(loss) 10,156 11,814 9,101 All other expense Tax expense/(benefit) (2,510 ) (2,920 ) (3,483 ) Provision/(benefit) for income taxes 7,646 8,894 5,618 Total reclassification from AOCI $ 11,952 $ 10,997 $ 2,375

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The aggregate amount of income taxes included in the Consolidated Statements of Income and the Consolidated Statements of Equity for the years ended December 31, were as follows: (Dollars in thousands) 2019 2018 2017 Consolidated Statements of Income: Income tax expense/(benefit) $ 133,291 $ 157,602 $ 131,892 Consolidated Statements of Equity: Income tax expense/(benefit) related to: Net unrealized gains/(losses) on pension and other postretirement plans 4,876 (177 ) (832 ) Net unrealized gains/(losses) on securities available-for-sale 35,062 (16,054 ) (2,955 ) Net unrealized gains/(losses) on cash flow hedges 5,035 (1,360 ) (3,163 ) Total $ 178,264 $ 140,011 $ 124,942 The components of income tax expense/(benefit) for the years ended December 31, were as follows: (Dollars in thousands) 2019 2018 2017 Current: Federal $ 105,294 $ 44,088 $ 10,012 State 13,640 9,957 879 Deferred: Federal 5,091 81,852 114,059 State 9,266 21,705 6,942 Total $ 133,291 $ 157,602 $ 131,892 The Tax Cuts and Jobs Act “Tax Act” was signed into law at the end of 2017. The Tax Act reduced the federal statutory tax rate from 35 percent to 21 percent effective January 1, 2018. FHN recorded approximately $82 million of increase in tax expense related to the effects of the Tax Act during 2017 which was primarily related to an adjustment of DTA balances to the lower federal tax rate. In 2018, FHN recorded a tax benefit of $6.7 million related to the finalization of tax items for the 2017 tax return. A reconciliation of expected income tax expense/(benefit) at the federal statutory rate of 21 percent for 2019 and 2018, respectively, and 35 percent for 2017 to the total income tax expense follows: (Dollars in thousands) 2019 2018 2017 Federal income tax rate 21% 21% 35% Tax computed at statutory rate $ 122,989 $ 149,963 $ 108,105 Increase/(decrease) resulting from: State income taxes, net of federal income tax benefit 15,319 24,553 4,753 Bank-owned life insurance (“BOLI”) (4,915 ) (3,626 ) (8,401 ) 401(k) – employee stock ownership plan (“ESOP”) (764 ) (653 ) (904 ) Tax-exempt interest (6,480 ) (6,538 ) (7,890 ) Non-deductible expenses 10,609 8,301 7,558 LIHTC credits and benefits, net of amortization (4,419 ) (7,178 ) (5,327 ) Other tax credits — (2,825 ) (2,480 ) Change in valuation allowance – DTA (74 ) (73 ) (40,473 ) Other changes in unrecognized tax benefits 4,044 6,143 46 Effect of Tax Act — (6,746 ) 82,027 Other (3,018 ) (3,719 ) (5,122 ) Total $ 133,291 $ 157,602 $ 131,892 As of December 31, 2019 , FHN had net deferred tax asset balances related to federal and state income tax carryforwards of $43.8 million and $1.2 million , respectively, which will expire at various dates as follows: (Dollars in thousands) Expiration Dates Net Deferred Tax Asset Balance Losses-federal 2028-2033 $ 43,774 Net operating losses-states 2020-2022 62 Net operating losses-states 2025-2035 1,124 A deferred tax asset (“DTA”) or deferred tax liability (“DTL”) is recognized for the tax consequences of temporary differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. The tax consequence is calculated by applying enacted statutory tax rates, applicable to future years, to these temporary differences. In order to support the recognition of the DTA, FHN’s management must believe that the realization of the DTA is more likely than not. FHN evaluates the likelihood of realization of the DTA based on both positive and negative evidence available at the time, including (as appropriate) scheduled reversals of DTLs, projected future taxable income, tax planning strategies, and recent financial performance. Realization is dependent on generating sufficient taxable income prior to the expiration of the carryforwards attributable to the DTA. In projecting future taxable income, FHN incorporates assumptions including the estimated amount of future state and federal pretax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates used to manage the underlying business. As of December 31, 2019 , FHN's net DTA was $69.0 million compared to the $127.9 million at December 31, 2018 . At December 31, 2019, FHN's gross DTA (net of a valuation allowance) and gross DTL were $250.6 million and $181.6 million , respectively. Although realization is not assured, FHN believes that it meets the more-likely-than-not requirement with respect to the net DTA after valuation allowance. Temporary differences which gave rise to deferred tax assets and deferred tax liabilities on December 31 , 2019 and 2018 were as follows: (Dollars in thousands) 2019 2018 Deferred tax assets: Loss reserves $ 58,251 $ 65,015 Employee benefits 68,254 64,843 Accrued expenses 4,340 15,763 Lease liability 55,543 — Federal loss carryforwards 43,774 49,821 State loss carryforwards 1,186 7,225 Investment in debt securities (ASC 320) (a) — 24,863 Other 19,255 27,168 Gross deferred tax assets 250,603 254,698 Valuation allowance — (74 ) Deferred tax assets after valuation allowance $ 250,603 $ 254,624 Deferred tax liabilities: Depreciation and amortization $ 50,725 $ 51,519 Investment in debt securities (ASC 320) (a) 10,154 — Equity investments 3,656 7,705 Other intangible assets 56,352 57,632 Prepaid expenses 10,024 9,218 ROU lease asset 50,151 — Other 540 683 Gross deferred tax liabilities 181,602 126,757 Net deferred tax assets $ 69,001 $ 127,867 (a) Tax effects of unrealized gains and losses are tracked on a security-by-security basis. The total unrecognized tax benefits (“UTB”) at December 31 , 2019 and 2018 , was $24.4 million and $20.2 million , respectively. To the extent such unrecognized tax benefits as of December 31, 2019 are subsequently recognized, $18.4 million of tax benefits would impact tax expense and FHN’s effective tax rate in future periods. FHN is currently in audit in several jurisdictions. It is reasonably possible that the UTB related to federal and state exposures could decrease by $6.7 million and $.5 million , respectively during 2020 if audits are completed and settled and if the applicable statutes of limitations expire as scheduled. FHN recognizes interest accrued and penalties related to UTB within income tax expense. FHN had approximately $2.9 million and $1.6 million accrued for the payment of interest as of December 31 , 2019 and 2018 , respectively. The total amount of interest and penalties recognized in the Consolidated Statements of Income during both 2019 and 2018 was an expense of $1.3 million . The rollforward of unrecognized tax benefits is shown below: (Dollars in thousands) Balance at December 31, 2017 $ 4,271 Increases related to prior year tax positions 16,695 Increases related to current year tax positions 1,576 Settlements (2,080 ) Lapse of statutes (278 ) Balance at December 31, 2018 $ 20,184 Increases related to prior year tax positions 2,522 Increases related to current year tax positions 2,170 Lapse of statutes (460 ) Balance at December 31, 2019 $ 24,416

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table provides reconciliations of net income to net income available to common shareholders and the difference between average basic common shares outstanding and average diluted common shares outstanding: (Dollars and shares in thousands, except per share data) 2019 2018 2017 Net income/(loss) $ 452,373 $ 556,507 $ 176,980 Net income attributable to noncontrolling interest 11,465 11,465 11,465 Net income/(loss) attributable to controlling interest 440,908 545,042 165,515 Preferred stock dividends 6,200 6,200 6,200 Net income/(loss) available to common shareholders $ 434,708 $ 538,842 $ 159,315 Weighted average common shares outstanding—basic 313,637 324,375 241,436 Effect of dilutive securities 2,020 3,070 3,017 Weighted average common shares outstanding—diluted 315,657 327,445 244,453 Net income/(loss) per share available to common shareholders $ 1.39 $ 1.66 $ 0.66 Diluted income/(loss) per share available to common shareholders $ 1.38 $ 1.65 $ 0.65 The following table presents outstanding options and other equity awards that were excluded from the calculation of diluted earnings per share because they were either anti-dilutive (the exercise price was higher than the weighted-average market price for the period) or the performance conditions have not been met: (Shares in thousands) 2019 2018 2017 Stock options excluded from the calculation of diluted EPS 2,359 2,256 2,468 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 21.12 $ 24.33 $ 25.62 Other equity awards excluded from the calculation of diluted EPS 2,224 608 176

Contingencies and Other Disclos

Contingencies and Other Disclosures	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Other Disclosures	Contingencies and Other Disclosures CONTINGENCIES Contingent Liabilities Overview Contingent liabilities arise in the ordinary course of business. Often they are related to lawsuits, arbitration, mediation, and other forms of litigation. Various litigation matters are threatened or pending against FHN and its subsidiaries. Also, FHN at times receives requests for information, subpoenas, or other inquiries from federal, state, and local regulators, from other government authorities, and from other parties concerning various matters relating to FHN’s current or former businesses. Certain matters of that sort are pending at this time, and FHN is cooperating in those matters. Pending and threatened litigation matters sometimes are settled by the parties, and sometimes pending matters are resolved in court or before an arbitrator. Regardless of the manner of resolution, frequently the most significant changes in status of a matter occur over a short time period, often following a lengthy period of little substantive activity. In view of the inherent difficulty of predicting the outcome of these matters, particularly where the claimants seek very large or indeterminate damages, or where the cases present novel legal theories or involve a large number of parties, or where claims or other actions may be possible but have not been brought, FHN cannot reasonably determine what the eventual outcome of the matters will be, what the timing of the ultimate resolution of these matters may be, or what the eventual loss or impact related to each matter may be. FHN establishes a loss contingency liability for a litigation matter when loss is both probable and reasonably estimable as prescribed by applicable financial accounting guidance. If loss for a matter is probable and a range of possible loss outcomes is the best estimate available, accounting guidance requires a liability to be established at the low end of the range. Based on current knowledge, and after consultation with counsel, management is of the opinion that loss contingencies related to threatened or pending litigation matters should not have a material adverse effect on the consolidated financial condition of FHN, but may be material to FHN’s operating results for any particular reporting period depending, in part, on the results from that period. Material Loss Contingency Matters Summary As used in this Note, except for matters that are reported as having been substantially settled or otherwise substantially resolved, FHN's “material loss contingency matters” generally fall into at least one of the following categories: (i) FHN has determined material loss to be probable and has established a material loss liability in accordance with applicable financial accounting guidance; (ii) FHN has determined material loss to be probable but is not reasonably able to estimate an amount or range of material loss liability; or (iii) FHN has determined that material loss is not probable but is reasonably possible, and that the amount or range of that reasonably possible material loss is estimable. As defined in applicable accounting guidance, loss is reasonably possible if there is more than a remote chance of a material loss outcome for FHN. Set forth below are disclosures for certain pending or threatened litigation matters, including all matters mentioned in (i) or (ii) and certain matters mentioned in (iii). In addition, certain other matters, or groups of matters, are discussed relating to FHN’s pre-2009 mortgage origination and servicing businesses. In all litigation matters discussed, unless settled or otherwise resolved, FHN believes it has meritorious defenses and intends to pursue those defenses vigorously. FHN reassesses the liability for litigation matters each quarter as the matters progress. At December 31, 2019 , the aggregate amount of liabilities established for all such loss contingency matters was $.7 million . These liabilities are separate from those discussed under the heading “Loan Repurchase and Foreclosure Liability” below. In each material loss contingency matter, except as otherwise noted, there is more than a remote chance that any of the following outcomes will occur: the plaintiff will substantially prevail; the defense will substantially prevail; the plaintiff will prevail in part; or the matter will be settled by the parties. At December 31, 2019, FHN is unable to estimate any material reasonably possible losses ("RPLs") for contingency matters in future periods in excess of currently established liabilities. As a result of the general uncertainties discussed above and the specific uncertainties discussed for each matter mentioned below, it is possible that the ultimate future loss experienced by FHN for any particular matter may materially exceed the amount, if any, of currently established liability for that matter. Material Matters FHN was one of multiple defendants in a consolidated putative class action suit: In re GSE Bonds Antitrust Litigation, No. 1:19-cv-01704-JSR (U.S. District Court S.D.N.Y.). The plaintiffs claim that defendants conspired to fix secondary market prices of government-sponsored enterprise (“GSE”) bonds from 2009 through 2015. During the third quarter, FHN reached a class settlement with the plaintiffs, subject to court approval, without admitting liability. Though still subject to court approval, the settlement was paid before year-end and therefore is no longer reflected in established liabilities. On February 26, 2020, a former shareholder of Capital Bank Financial Corp. ("CBF") filed a putative class action suit, Searles v. DeMartini et al, No. 2020-0136 (Del. Chancery), against certain former directors, officers, and shareholders of CBF, alleging, among other things, that defendants breached certain fiduciary duties in connection with CBF's merger with FHN in 2017. Plaintiff claims unspecified damages related to the merger consideration and opportunity loss. FHN is unable to estimate an RPL range for this matter due to significant uncertainties regarding: whether a class will be certified and, if so, the composition of the class; the amount of potential damages that might be awarded, if any; of any such damages amount, the amount that FHN would be obliged to indemnify; the availability of applicable insurance; and the outcome of discovery, which has not yet begun. Exposures from pre-2009 Mortgage Business FHN is contending with indemnification claims related to "other whole loans sold," which were mortgage loans originated by FHN before 2009 and sold outside of an FHN securitization. These claims generally assert that FHN-originated loans contributed to losses in connection with mortgage loans securitized by the buyer of the loans. The claims generally do not include specific deficiencies for specific loans sold by FHN. Instead, the claims generally assert that FHN is liable for a share of the claimant's loss estimated by assessing the totality of the other whole loans sold by FHN to claimant in relation to the totality of the larger number of loans securitized by claimant. FHN is unable to estimate an RPL range for these matters due to significant uncertainties regarding: the number of, and the facts underlying, the loan originations which claimants assert are indemnifiable; the applicability of FHN’s contractual indemnity covenants to those facts and originations; and, in those cases where an indemnity claim may be supported, whether any legal defenses, counterclaims, other counter-positions, or third-party claims might eliminate or reduce claims against FHN or their impact on FHN. FHN also has indemnification claims related to servicing obligations. The most significant is from Nationstar Mortgage LLC, currently doing business as “Mr. Cooper.” Nationstar was the purchaser of FHN’s mortgage servicing obligations and assets in 2013 and 2014 and, starting in 2011, was FHN’s subservicer. Nationstar asserts several categories of indemnity obligations in connection with mortgage loans under the subservicing arrangement and under the purchase transaction. This matter currently is not in litigation, but litigation in the future is possible. FHN is unable to estimate an RPL range for this matter due to significant uncertainties regarding: the exact nature of each of Nationstar’s claims and its position in respect of each; the number of, and the facts underlying, the claimed instances of indemnifiable events; the applicability of FHN’s contractual indemnity covenants to those facts and events; and, in those cases where the facts and events might support an indemnity claim, whether any legal defenses, counterclaims, other counter-positions, or third-party claims might eliminate or reduce claims against FHN or their impact on FHN. FHN has additional potential exposures related to its pre-2009 mortgage businesses. A few of those matters have become litigation which FHN currently estimates are immaterial, some are non-litigation claims or threats, some are mere subpoenas or other requests for information, and in some areas FHN has no indication of any active or threatened dispute. Some of those matters might eventually result in settlements, and some might eventually result in adverse litigation outcomes, but none are included in the material loss contingency liabilities mentioned above or in the RPL range mentioned above. Mortgage Loan Repurchase and Foreclosure Liability FHN’s repurchase and foreclosure liability, primarily related to its pre-2009 mortgage businesses, is comprised of accruals to cover estimated loss content in the active pipeline (consisting of mortgage loan repurchase, make-whole, foreclosure/servicing demands and certain related exposures), estimated future inflows, and estimated loss content related to certain known claims not currently included in the active pipeline. FHN compares the estimated probable incurred losses determined under the applicable loss estimation approaches for the respective periods with current reserve levels. Changes in the estimated required liability levels are recorded as necessary through the repurchase and foreclosure provision. Based on currently available information and experience to date, FHN has evaluated its loan repurchase, make-whole, foreclosure, and certain related exposures and has accrued for losses of $14.5 million and $32.3 million as of December 31, 2019 and December 31, 2018, respectively. Accrued liabilities for FHN’s estimate of these obligations are reflected in Other liabilities on the Consolidated Statements of Condition. Charges/expense reversals to increase/decrease the liability are included within Repurchase and foreclosure provision/(provision credit) on the Consolidated Statements of Income. The estimates are based upon currently available information and fact patterns that exist as of each balance sheet date and could be subject to future changes. Changes to any one of these factors could significantly impact the estimate of FHN’s liability. OTHER DISCLOSURES Indemnification Agreements and Guarantees In the ordinary course of business, FHN enters into indemnification agreements for legal proceedings against its directors and officers and standard representations and warranties for underwriting agreements, merger and acquisition agreements, loan sales, contractual commitments, and various other business transactions or arrangements. The extent of FHN’s obligations under these agreements depends upon the occurrence of future events; therefore, it is not possible to estimate a maximum potential amount of payouts that could be required by such agreements.

Pension, Savings, and Other Emp

Pension, Savings, and Other Employee Benefits	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Pension, Savings, and Other Employee Benefits	Pension, Savings, and Other Employee Benefits Pension plan. FHN sponsors a noncontributory, qualified defined benefit pension plan to employees hired or re-hired on or before September 1, 2007. Pension benefits are based on years of service, average compensation near retirement or other termination, and estimated social security benefits at age 65 . Benefits under the plan are “frozen” so that years of service and compensation changes after 2012 do not affect the benefit owed. Minimum contributions are based upon actuarially determined amounts necessary to fund the total benefit obligation. Decisions to contribute to the plan are based upon pension funding requirements under the Pension Protection Act, the maximum amount deductible under the Internal Revenue Code, the actual performance of plan assets, and trends in the regulatory environment. FHN made no contributions to the qualified pension plan in 2019 and 2017, and made an insignificant contribution to the qualified pension plan in 2018. Management does not currently anticipate that FHN will make a contribution to the qualified pension plan in 2020. FHN assumed two additional qualified pension plans in conjunction with the CBF acquisition. Both legacy CBF plans were frozen at the time of acquisition. As of December 31, 2018, the aggregate benefit obligation for the plans was $17.1 million and aggregate plan assets were $16.5 million . Benefit payments, expense and actuarial gains/losses related to these plans were insignificant for the first half of 2019 and 2018. In third quarter 2019, FHN settled these plans through the purchase of annuity contracts, making related contributions of $.5 million . Due to the insignificant financial statement impact, these two plans are not included in the disclosures that follow. FHN also maintains non-qualified plans including a supplemental retirement plan that covers certain employees whose benefits under the qualified pension plan have been limited by tax rules. These other non-qualified plans are unfunded, and contributions to these plans cover all benefits paid under the non-qualified plans. Payments made under the non-qualified plans were $5.2 million for 2019. FHN anticipates making benefit payments under the non-qualified plans of $5.2 million in 2020. Savings plan. FHN provides all qualifying full-time employees with the opportunity to participate in FHN's tax qualifi ed 401(k) savings plan. The qualified plan allows employees to defer receipt of earned salary, up to tax law limits, on a tax- advantaged basis. Accounts, which are held in trust, may be invested in a wide range of mutual funds and in FHN common stock. Up to tax law limits, FHN provides a 100 percent match for the first 6 percent of salary deferred, with company matching contributions invested according to a participant’s current investment election. Through a non-qualified savings restoration plan, FHN provides a restorative benefit to certain highly-compensated employees who participate in the savings plan and whose contribution elections are capped by tax limitations. FHN also provides “flexible dollars” to assist employees with the cost of annual benefits and/or allow the employee to contribute to his or her qualified savings plan account. These “flexible dollars” are pre-tax contributions and are based upon the employees’ years of service and qualified compensation. Contributions made by FHN through the flexible benefits plan and the company matches were $27.7 million for 2019, $29.3 million for 2018, and $23.0 million for 2017. Other employee benefits. FHN provides postretirement life insurance benefits to certain employees and also provides postretirement medical insurance benefits to retirement-eligible employees. The postretirement medical plan is contributory with FHN contributing a fixed amount for certain participants. FHN’s postretirement benefits include certain prescription drug benefits. Actuarial assumptions. FHN’s process for developing the long-term expected rate of return of pension plan assets is based on capital market exposure as the source of investment portfolio returns. Capital market exposure refers to the plan’s allocation of its assets to asset classes, which primarily represent fixed income investments. FHN also considers expectations for inflation, real interest rates, and various risk premiums based primarily on the historical risk premium for each asset class. The expected return is based upon a time horizon of thirty years . Given its funded status, the asset allocation strategy for the qualified pension plan utilizes fixed income instruments that closely match the estimated duration of payment obligations. Consequently, FHN selected a 4.80 percent assumption for 2019 for the qualified defined benefit pension plan and a .05 percent assumption for postretirement medical plan assets dedicated to employees who retired prior to January 1, 1993. FHN selected a 6.85 percent assumption for 2019 for postretirement medical plan assets dedicated to employees who retired after January 1, 1993. The discount rates for the three years ended 2019 for pension and other benefits were determined by using a hypothetical AA yield curve represented by a series of annualized individual discount rates from one-half to thirty years . The discount rates are selected based upon data specific to FHN’s plans and employee population. The bonds used to create the hypothetical yield curve were subjected to several requirements to ensure that the resulting rates were representative of the bonds that would be selected by management to fulfill the company’s funding obligations. In addition to the AA rating, only non-callable bonds were included. Each bond issue was required to have at least $300 million par outstanding so that each issue was sufficiently marketable. Finally, bonds more than two standard deviations from the average yield were removed. When selecting the discount rate, FHN matches the duration of high quality bonds with the duration of the obligations of the plan as of the measurement date. For all years presented, the measurement date of the benefit obligations and net periodic benefit costs was December 31. The actuarial assumptions used in the defined benefit pension plans and other employee benefit plans were as follows: Benefit Obligations Net Periodic Benefit Cost 2019 2018 2017 2019 2018 2017 Discount rate Qualified pension 3.31% 4.43% 3.76% 4.43% 3.75% 4.37% Nonqualified pension 3.08% 4.26% 3.59% 4.26% 3.59% 4.07% Other nonqualified pension 2.57% 3.83% 3.19% 3.83% 3.19% 3.39% Postretirement benefits 2.85% - 3.44% 4.03% - 4.56% 3.37% - 3.87% 4.04% - 4.56% 3.35% - 3.87% 3.68% - 4.57% Expected long-term rate of return Qualified pension/ postretirement benefits N/A N/A N/A 4.80% 4.20% 4.50% Postretirement benefit (retirees post January 1, 1993) N/A N/A N/A 6.85% 5.95% 6.00% Postretirement benefit (retirees prior to January 1, 1993) N/A N/A N/A 0.05% 2.15% 2.15% The rate of compensation increase previously had a significant effect on the actuarial assumptions used for the defined benefit pension plan. However, since the benefits in the pension plan are frozen, the rate of compensation increase has no effect upon qualified pension benefits. FHN has one pension plan where participants' benefits are affected by interest crediting rates. The plan's projected benefit obligation as of December 31, 2019, 2018 and 2017 and interest crediting rates for the respective years are: (Dollars in thousands) 2019 2018 2017 Projected benefit obligation $ 16,213 $ 16,947 $ 19,115 Interest crediting rate 9.66 % 10.12 % 9.28 % The components of net periodic benefit cost for the plan years 2019 , 2018 and 2017 are as follows: (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2017 2019 2018 2017 Components of net periodic benefit cost Service cost $ 30 $ 41 $ 37 $ 94 $ 133 $ 107 Interest cost 30,207 27,877 29,380 1,413 1,309 1,305 Expected return on plan assets (36,908 ) (32,897 ) (36,015 ) (1,136 ) (1,074 ) (947 ) Amortization of unrecognized: Prior service cost/(credit) — — 52 32 — 95 Actuarial (gain)/loss 9,888 12,102 9,521 (493 ) (387 ) (567 ) Net periodic benefit cost 3,217 7,123 2,975 (90 ) (19 ) (7 ) ASC 715 settlement expense — — 43 194 99 — Total periodic benefit costs $ 3,217 $ 7,123 $ 3,018 $ 104 $ 80 $ (7 ) The long-term expected rate of return is applied to the market-related value of plan assets in determining the expected return on plan assets. FHN determines the market-related value of plan assets using a calculated value that recognizes changes in the fair value of plan assets over five years, as permitted by GAAP. FHN utilizes a spot rate approach which applies duration-specific rates from the full yield curve to estimated future benefit payments for the determination of interest cost. The following tables set forth the plans’ benefit obligations and plan assets for 2019 and 2018 : (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2019 2018 Change in benefit obligation Benefit obligation, beginning of year $ 765,309 $ 840,884 $ 35,174 $ 39,562 Service cost 30 41 94 133 Interest cost 30,207 27,877 1,413 1,309 Plan Amendments — — 408 — Actuarial (gain)/loss (a) 102,775 (68,724 ) 6,848 (3,648 ) Actual benefits paid (38,450 ) (34,769 ) (1,641 ) (2,182 ) Premium paid for annuity purchase (b) (23,997 ) — — — Benefit obligation, end of year $ 835,874 $ 765,309 $ 42,296 $ 35,174 Change in plan assets Fair value of plan assets, beginning of year $ 730,953 $ 811,244 $ 17,432 $ 18,753 Actual return on plan assets 154,054 (49,470 ) 3,355 (928 ) Employer contributions 3,510 3,948 1,259 1,789 Actual benefits paid – settlement payments — — (1,641 ) (2,182 ) Actual benefits paid – other payments (38,450 ) (34,769 ) — — Premium paid for annuity purchase (b) (23,997 ) — — — Fair value of plan assets, end of year $ 826,070 $ 730,953 $ 20,405 $ 17,432 Funded (unfunded) status of the plans $ (9,804 ) $ (34,356 ) $ (21,891 ) $ (17,742 ) Amounts recognized in the Statements of Condition Other assets $ 27,433 $ 1,911 $ 17,240 $ 14,356 Other liabilities (37,237 ) (36,267 ) (39,131 ) (32,098 ) Net asset/(liability) at end of year $ (9,804 ) $ (34,356 ) $ (21,891 ) $ (17,742 ) (a) Variances in the actuarial (gain)/loss are due to normal activity such as changes in discount rates, updates to participant demographic information and revisions to life expectancy assumptions. (b) 2019 amounts represent settlements of certain retired participants in the qualified pension plan that occurred during the year. The projected benefit obligation for unfunded plans are as follows: Total Pension Benefits Other Benefits (Dollars in thousands 2019 2018 2019 2018 Projected benefit obligation $ 37,237 $ 36,267 $ 39,131 $ 32,098 The qualified pension plan was overfunded as of December 31, 2019 by $27.4 million . Because of the pension freeze as of the end of 2012, the pension benefit obligation and the accumulated benefit obligation are the same as of December 31, 2019 and 2018 . The qualified pension plan was overfunded as of December 31, 2018 by $1.9 million . FHN's funded post retirement plan was also in an overfunded status as of December 31, 2019 and 2018. Unrecognized actuarial gains and losses and unrecognized prior service costs and credits are recognized as a component of accumulated other comprehensive income. Balances reflected in accumulated other comprehensive income on a pre-tax basis for the years ended December 31, 2019 and 2018 consist of: (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2019 2018 Amounts recognized in accumulated other comprehensive income Prior service cost/(credit) $ — $ — $ 408 $ — Net actuarial (gain)/loss 362,799 387,058 (1,555 ) (6,451 ) Total $ 362,799 $ 387,058 $ (1,147 ) $ (6,451 ) The pre-tax amounts recognized in other comprehensive income during 2019 and 2018 were as follows: (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2019 2018 Changes in plan assets and benefit obligation recognized in other comprehensive income Net actuarial (gain)/loss arising during measurement period $ (14,371 ) $ 13,643 $ 4,629 $ (1,646 ) Prior service cost/(credit) arising during measurement period — — 408 — Items amortized during the measurement period: Prior service credit/(cost) — — (32 ) — Net actuarial gain/(loss) (9,888 ) (12,102 ) 299 288 Total recognized in other comprehensive income $ (24,259 ) $ 1,541 $ 5,304 $ (1,358 ) FHN utilizes the minimum amortization method in determining the amount of actuarial gains or losses to include in plan expense. Under this approach, the net deferred actuarial gain or loss that exceeds a threshold is amortized over the average remaining service period of active plan participants. The threshold is measured as the greater of: 10 percent of a plan’s projected benefit obligation as of the beginning of the year or 10 percent of the market related value of plan assets as of the beginning of the year. FHN amortizes actuarial gains and losses using the estimated average remaining life expectancy of the remaining participants since all participants are considered inactive due to the freeze. The following table provides detail on expected benefit payments, which reflect expected future service, as appropriate: (Dollars in thousands) Pension Benefits Other Benefits 2020 $ 38,304 $ 1,675 2021 40,215 1,744 2022 41,152 1,818 2023 42,631 1,897 2024 43,752 1,977 2025-2029 231,267 11,127 Plan assets. FHN’s overall investment goal is to create, over the life of the pension plan and retiree medical plan, an adequate pool of sufficiently liquid assets to support the qualified pension benefit obligations to participants, retirees, and beneficiaries, as well as to partially support the medical obligations to retirees and beneficiaries. Thus, the qualified pension plan and retiree medical plan seek to achieve a level of investment return consistent with changes in projected benefit obligations. Qualified pension plan assets primarily consist of fixed income securities which include U.S. treasuries, corporate bonds of companies from diversified industries, municipal bonds, and foreign bonds. Fixed income investments generally have long durations consistent with the estimated pension liabilities of FHN. This duration-matching strategy is intended to hedge substantially all of the plan’s risk associated with future benefit payments. Retiree medical funds are kept in short-term investments, primarily money market funds and mutual funds. On December 31, 2019 and 2018, FHN did not have any significant concentrations of risk within the plan assets related to the pension plan or the retiree medical plan. The fair value of FHN’s pension plan assets at December 31, 2019 and 2018 , by asset category classified using the Fair Value measurement hierarchy is shown in the table below. See Note 24 – Fair Value of Assets and Liabilities for more details about Fair Value measurements. (Dollars in thousands) December 31, 2019 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 9,300 $ — $ — $ 9,300 Fixed income securities: U.S. treasuries — 5,377 — 5,377 Corporate, municipal and foreign bonds — 514,965 — 514,965 Common and collective funds: Fixed income — 296,428 — 296,428 Total $ 9,300 $ 816,770 $ — $ 826,070 (Dollars in thousands) December 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 13,855 $ — $ — $ 13,855 Fixed income securities: U.S. treasuries — 28,626 — 28,626 Corporate, municipal and foreign bonds — 688,472 — 688,472 Total $ 13,855 $ 717,098 $ — $ 730,953 The Pension and Savings Investment Committees, comprised of senior managers within the organization, meet regularly to review asset performance and potential portfolio revisions. Adjustments to the qualified pension plan asset allocation primarily reflect changes in anticipated liquidity needs for plan benefits. The fair value of FHN’s retiree medical plan assets at December 31, 2019 and 2018 by asset category are as follows: (Dollars in thousands) December 31, 2019 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 130 $ — $ — $ 130 Mutual funds: Equity mutual funds 13,163 — — 13,163 Fixed income mutual funds 7,112 — — 7,112 Total $ 20,405 $ — $ — $ 20,405 (Dollars in thousands) December 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 207 $ — $ — $ 207 Mutual funds: Equity mutual funds 10,387 — — 10,387 Fixed income mutual funds 6,838 — — 6,838 Total $ 17,432 $ — $ — $ 17,432

Stock Options, Restricted Stock

Stock Options, Restricted Stock, and Dividend Reinvestment Plans	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock Options, Restricted Stock, and Dividend Reinvestment Plans	Stock Options, Restricted Stock, and Dividend Reinvestment Plans Equity compensation plans FHN currently has one plan, its shareholder-approved Equity Compensation Plan (“ECP”), which authorizes the grant of new stock-based awards to employees and directors. Most awards outstanding at year end were granted under the ECP, though older stock options and certain deferred stock units remain outstanding under several plans which no longer are active. The ECP authorizes a broad range of award types, including restricted shares, stock units, and stock options. Stock units may be paid in shares or cash, depending upon the terms of the award. The ECP also authorizes the grant of stock appreciation rights, though no such grants have been made. Unvested awards have service and/or performance conditions which must be met in order for the shares to vest. Awards generally have service-vesting conditions, meaning that the employee must remain employed by FHN for certain periods in order for the award to vest. Some outstanding awards also have performance conditions, and one outstanding award has performance conditions associated with FHN’s stock price. FHN operates the ECP by establishing award programs, each of which is intended to cover a specific need. Programs are created, changed, or terminated as needs change. On December 31, 2019 , there were 6,350,062 shares available for new awards under the ECP. The ECP imposes a separate limit on full-value (non-option) awards which is included within the overall limit; at December 31, 2019 there were 4,961,854 shares available to be granted as full-value awards. Service condition full-value awards. Awards may be granted with service conditions only. In recent years, programs using these awards have included annual programs for executives and selected management employees, a mandatory deferral program for executives tied to annual bonuses earned, other mandatory or elective deferral programs, various retention programs, and special hiring-incentive situations. Details of the awards vary by program, but most are settled in shares at vesting rather than cash, and vesting rarely begins earlier than the first anniversary of grant and rarely extends beyond the fifth anniversary of grant. Annual programs tend to use multiple annual vesting dates while retention programs tend to use a single vesting date, but there are exceptions. Performance condition awards. Under FHN’s long-term incentive and corporate performance programs, performance stock units (“PSUs”) (executives) and cash units (selected management employees) are granted annually and vest only if predetermined performance measures are met. The measures are changed each year based on goals and circumstances prevailing at the time of grant. In recent years the performance periods have been three years , with service-vesting near the third anniversary of the grant. PSUs granted after 2014 also have a post-vest holding period of two years . Recent annual performance awards require pro-rated forfeiture for performance falling between a threshold level and a maximum. Performance awards sometimes are used to provide a narrow, targeted incentive to a single person or small group; one such award which includes a market performance condition to FHN’s Chief Executive Officer (“CEO”) is discussed in the next paragraph. Of the annual program awards paid during 2019 or outstanding on December 31, 2019 : the 2015 units vested in 2018 and remain in a two year post-vesting holding period; performance conditions related to the 2016 units were met at the 104.2 percent payout level and vested in 2019 ; the three years performance period of the 2017 units has ended but performance is measured relative to peers and has not yet been determined; and, the three years performance periods for the 2018 and 2019 units have not ended. Market condition award. In 2016, FHN made a special grant of performance stock units to FHN’s CEO which will vest at the end of a performance period of seven years . The award has no provision for pro-rated payment based on partial performance. The award’s performance goal is based on achievement of a specific level of total shareholder return during the performance period. Director awards. Non-employee directors receive cash and annual grants of service-conditioned stock units under a program approved by the board of directors. Director stock units vest in the year following the year of grant, require a payment deferral of two years , and settle in shares after the deferral period. In 2019 and 2018 each director received $65,000 or prorated equivalent of stock units, representing a portion of their annual retainer. Prior to 2005 directors could elect to defer cash compensation in the form of discount-priced stock options, some of which remain outstanding. Stock and stock unit awards. A summary of restricted and performance stock and unit activity during the year ended December 31, 2019 , is presented below: Shares/ Units (a) Weighted average grant date fair value (per share) (b) January 1, 2019 4,089,824 $ 16.27 Shares/units granted 1,761,343 14.93 Shares/units vested/distributed (1,042,270 ) 13.99 Shares/units cancelled (120,649 ) 17.43 December 31, 2019 4,688,248 $ 16.25 (a) Includes only units that settle in shares and nonvested performance units are included at 100% payout level. (b) The weighted average grant date fair value for shares/units granted in 2018 and 2017 was $18.70 and $18.83 , respectively. On December 31, 2019 , there was $29.5 million of unrecognized compensation cost related to nonvested restricted stock awards. That cost is expected to be recognized over a weighted-average period of 2.1 years . The total grant date fair value of shares vested during 2019 , 2018 and 2017 , was $14.6 million , $12.6 million , and $9.9 million , respectively. Stock option awards. Currently FHN operates only a single option program, calling for annual grants of service-vested options to executives. In the past, however, option programs varied widely in their uses and terms, and many old-program options, granted under the ECP or its predecessor plans, remain outstanding today. Except for substitute options (discussed below), all options granted since 2005 provide for the issuance of FHN common stock at a price fixed at its fair market value on the grant date. Except for substitute options, converted options and a special retention stock option award to the CEO in 2016, all options granted since 2008 vest fully no later than the fourth anniversary of grant, and all such options expire 7 years from the grant date. Substitute options can be issued under the ECP in exchange for options of an acquired company that are canceled in a merger. The price, vesting, expiration, and other terms of the substitute options economically mirror those of the canceled options. Converted options from CBF are all fully vested and expire ten years from grant date. The 2016 retention award vests beginning on the fourth anniversary of grant and extends through the sixth anniversary of grant. A deferral program, which was discontinued in 2005, allowed for foregone compensation plus the exercise price to equal the fair market value of the stock on the date of grant if the grantee agreed to receive the options in lieu of compensation. Deferral options still outstanding expire 20 years from the grant date. The summary of stock option activity for the year ended December 31, 2019 , is shown below: Options Outstanding Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (thousands) January 1, 2019 5,904,687 $ 16.16 Options granted 530,787 15.43 Options exercised (895,695 ) 10.79 Options expired/cancelled (607,998 ) 27.94 December 31, 2019 4,931,781 15.61 3.08 $ 13,385 Options exercisable 3,347,210 15.76 2.32 10,060 Options expected to vest 1,584,571 15.28 4.68 3,325 The total intrinsic value of options exercised during 2019 , 2018 and 2017 was $4.4 million , $3.0 million , and $2.5 million , respectively. On December 31, 2019 , there was $1.4 million of unrecognized compensation cost related to nonvested stock options. That cost is expected to be recognized over a weighted-average period of 2.5 years. FHN granted or converted 530,787 , 394,296 and 1,483,323 stock options with a weighted average fair value of $2.69 , $3.89 , and $4.69 per option at grant date in 2019 , 2018 and 2017 , respectively. FHN used the Black-Scholes Option Pricing Model to estimate the fair value of stock options granted or converted in 2019 , 2018 , and 2017 with the following assumptions: 2019 2018 2017 Expected dividend yield 3.63% 2.57% 1.82% Expected weighted-average lives of options granted 6.24 years 6.21 years 6.09 years Expected weighted-average volatility 24.76% 24.61% 26.90% Expected volatility range 23.07 - 26.45% 23.95 - 25.26% 24.36 - 29.44% Risk-free interest rate 2.53% 2.69% 2.07% Expected lives of options granted are determined based on the vesting period, historical exercise patterns and contractual term of the options. FHN uses a blend of historical and implied volatility in determining expected volatility. A portion of the weighted average volatility rate is derived by compiling daily closing stock prices over a historical period approximating the expected lives of the options. Additionally, because of market volatility due to economic conditions and the impact on stock prices of financial institutions, FHN also incorporates a measure of implied volatility so as to incorporate more recent market conditions in the estimation of future volatility. Compensation Cost. The compensation cost that has been included in the Consolidated Statements of Income pertaining to stock-based awards was $22.7 million , $23.2 million , and $20.6 million for 2019 , 2018 , and 2017 , respectively. The corresponding total income tax benefits recognized were $5.6 million in 2019 , $5.7 million in 2018 , and $7.9 million in 2017 . Authorization. Consistent with Tennessee state law, only authorized, but unissued, stock may be utilized in connection with any issuance of FHN common stock which may be required as a result of stock based compensation awards. FHN has obtained authorization from the Board of Directors to repurchase up to certain numbers of shares related to issuance under the ECP and several older stock award plans. These authorizations are automatically adjusted for stock splits and stock dividends. Repurchases are authorized to be made in the open market or through privately negotiated transactions and will be subject to market conditions, accumulation of excess equity, legal and regulatory restrictions, and prudent capital management. FHN does not currently expect to repurchase a material number of shares under the compensation plan-related repurchase program during 2020. Dividend reinvestment plan. The Dividend Reinvestment and Stock Purchase Plan authorizes the sale of FHN’s common stock from stock acquired on the open market to shareholders who choose to invest all or a portion of their cash dividends or make optional cash payments of $25 to $10,000

Business Segment Information

Business Segment Information	12 Months Ended
	Dec. 31, 2019
Segment Reporting, Measurement Disclosures [Abstract]
Business Segment Information	Business Segment Information FHN has four business segments: regional banking, fixed income, corporate, and non-strategic. The regional banking segment offers financial products and services, including traditional lending and deposit taking, to consumer and commercial customers primarily in the southeast and other selected markets. Regional banking also provides investments, wealth management, financial planning, trust services and asset management, mortgage banking, credit card, and cash management. Additionally, the regional banking segment includes correspondent banking which provides credit, depository, and other banking related services to other financial institutions nationally. The fixed income segment consists of fixed income securities sales, trading, underwriting, and strategies for institutional clients in the U.S. and abroad, as well as loan sales, portfolio advisory services, and derivative sales. The corporate segment consists of unallocated corporate expenses, expense on subordinated debt issuances, bank-owned life insurance, unallocated interest income associated with excess equity, net impact of raising incremental capital, revenue and expense associated with deferred compensation plans, funds management, tax credit investment activities, derivative valuation adjustments related to prior sales of Visa Class B shares, gain/(loss) on extinguishment of debt, acquisition- and integration-related costs, expenses associated with rebranding initiatives, and various charges related to restructuring, repositioning, and efficiency efforts. The non-strategic segment consists of run-off consumer lending activities, pre-2009 mortgage banking elements, and the associated ancillary revenues and expenses related to these businesses. Non-strategic also includes the wind-down trust preferred loan portfolio and exited businesses. Periodically, FHN adapts its segments to reflect managerial or strategic changes. FHN may also modify its methodology of allocating expenses and equity among segments which could change historical segment results. Business segment revenue, expense, asset, and equity levels reflect those which are specifically identifiable or which are allocated based on an internal allocation method. Because the allocations are based on internally developed assignments and allocations, to an extent they are subjective. Generally, all assignments and allocations have been consistently applied for all periods presented. The following table reflects the amounts of consolidated revenue, expense, tax, and average assets, as well as, depreciation and amortization expense and expenditures for long lived assets for each segment for the years ended December 31: (Dollars in thousands) 2019 2018 2017 Consolidated Net interest income $ 1,210,187 $ 1,220,317 $ 842,314 Provision/(provision credit) for loan losses 47,000 7,000 — Noninterest income 654,080 722,788 490,219 Noninterest expense 1,231,603 1,221,996 1,023,661 Income/(loss) before income taxes 585,664 714,109 308,872 Provision/(benefit) for income taxes 133,291 157,602 131,892 Net income/(loss) $ 452,373 $ 556,507 $ 176,980 Average assets $ 41,744,264 $ 40,225,459 $ 29,924,813 Depreciation and amortization $ 65,239 $ 59,125 $ 70,924 Expenditures for long-lived assets 49,159 38,166 287,642 (Dollars in thousands) 2019 2018 2017 Regional Banking Net interest income $ 1,196,318 $ 1,197,471 $ 844,439 Provision/(provision credit) for loan losses 66,059 24,643 21,451 Noninterest income 329,834 311,763 259,546 Noninterest expense 789,033 826,262 628,050 Income/(loss) before income taxes 671,060 658,329 454,484 Provision/(benefit) for income taxes 158,148 154,659 162,348 Net income/(loss) $ 512,912 $ 503,670 $ 292,136 Average assets $ 30,785,775 $ 28,366,987 $ 19,469,287 Depreciation and amortization $ 31,719 $ 31,316 $ 45,734 Expenditures for long-lived assets 35,207 36,164 274,992 Fixed Income Net interest income $ 26,044 $ 35,753 $ 18,122 Noninterest income 278,423 164,769 217,086 Noninterest expense 236,660 189,373 206,427 Income/(loss) before income taxes 67,807 11,149 28,781 Provision/(benefit) for income taxes 16,137 2,097 9,698 Net income/(loss) $ 51,670 $ 9,052 $ 19,083 Average assets $ 2,961,655 $ 3,297,579 $ 2,539,899 Depreciation and amortization $ 8,150 $ 9,603 $ 8,036 Expenditures for long-lived assets 909 646 1,877 Corporate Net interest income/(expense) $ (40,774 ) $ (64,191 ) $ (59,261 ) Noninterest income (a) 41,357 239,263 8,887 Noninterest expense (b) (c) (d) 195,683 177,923 144,333 Income/(loss) before income taxes (195,100 ) (2,851 ) (194,707 ) Provision/(benefit) for income taxes (51,348 ) (10,889 ) (47,967 ) Net income/(loss) $ (143,752 ) $ 8,038 $ (146,740 ) Average assets $ 6,951,611 $ 7,090,069 $ 6,370,951 Depreciation and amortization $ 27,649 $ 23,285 $ 16,764 Expenditures for long-lived assets 12,560 308 8,951 Non-Strategic Net interest income $ 28,599 $ 51,284 $ 39,014 Provision/(provision credit) for loan losses (19,059 ) (17,643 ) (21,451 ) Noninterest income 4,466 6,993 4,700 Noninterest expense 10,227 28,438 44,851 Income/(loss) before income taxes 41,897 47,482 20,314 Provision/(benefit) for income taxes 10,354 11,735 7,813 Net income/(loss) $ 31,543 $ 35,747 $ 12,501 Average assets $ 1,045,223 $ 1,470,824 $ 1,544,676 Depreciation and amortization $ (2,279 ) $ (5,079 ) $ 390 Expenditures for long-lived assets 483 1,048 1,822 Certain previously reported amounts have been reclassified to agree with current presentation. (a) 2018 includes a $212.9 million pre-tax gain from the sale of Visa Class B shares; 2017 includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction. (b) 2019 includes restructuring-related costs associated with efficiency initiatives; refer to Note 25 - Restructuring, Repositioning, and Efficiency for additional information. 2019 and 2018 include acquisition-related expenses; refer to Note 2 - Acquisitions and Divestitures for additional information (c) 2019 includes $21.3 million , respectively, of asset impairments, professional fees, and other customer-contact and technology-related expenses associated with rebranding initiatives. (d) 2019 and 2017 include $11.0 million and $8.8 million , respectively, of contributions to FHN's foundation. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the years ended December 31, 2019, 2018, and 2017: December 31, 2019 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 122 $ 277,561 $ — $ 1,106 $ 278,789 Deposit transactions and cash management 124,832 4 6,610 217 131,663 Brokerage, management fees and commissions 55,462 — — 5 55,467 Trust services and investment management 29,600 — (89 ) — 29,511 Bankcard income 28,540 11 248 (491 ) 28,308 BOLI (b) — — 19,210 — 19,210 Debt securities gains/(losses), net (b) — — (267 ) — (267 ) Equity securities gains/(losses), net (b) — — 441 — 441 All other income and commissions (d) 91,278 847 15,204 3,629 110,958 Total noninterest income $ 329,834 $ 278,423 $ 41,357 $ 4,466 $ 654,080 December 31, 2018 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 417 $ 163,382 $ — $ 4,083 $ 167,882 Deposit transactions and cash management 126,832 12 6,214 223 133,281 Brokerage, management fees and commissions 54,800 — — 3 54,803 Trust services and investment management 29,852 — (46 ) — 29,806 Bankcard income 29,434 — 226 (356 ) 29,304 BOLI (b) — — 18,955 — 18,955 Debt securities gains/(losses), net (b) — — 52 — 52 Equity securities gains/(losses), net (b) (c) — — 212,896 — 212,896 All other income and commissions (d) 70,428 1,375 966 3,040 75,809 Total noninterest income $ 311,763 $ 164,769 $ 239,263 $ 6,993 $ 722,788 December 31, 2017 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income $ 430 $ 216,195 $ — $ — $ 216,625 Deposit transactions and cash management 105,058 3 5,338 193 110,592 Brokerage, management fees and commissions 48,513 — 1 — 48,514 Trust services and investment management 28,491 — (71 ) — 28,420 Bankcard income 25,983 — 225 227 26,435 BOLI — — 15,124 — 15,124 Debt securities gains/(losses), net 386 — 97 — 483 Equity securities gains/(losses), net — — 109 — 109 All other income and commissions (e) 50,685 888 (11,936 ) 4,280 43,917 Total noninterest income $ 259,546 $ 217,086 $ 8,887 $ 4,700 $ 490,219 Certain previously reported amounts have been reclassified to agree with current presentation. (a) For years ended 2019 and 2018, includes $33.7 million and $28.9 million , respectively, of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." 2019 and 2018 include $1.1 million and $4.1 million , respectively, of gains from the reversal of a previous valuation adjustment due to sales and payoffs of TRUPS loans excluded from the scope of ASC 606 in the Non-strategic segment. (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total non-interest income. (c) Includes a pre-tax gain of $212.9 million from the sale of FHN's remaining holdings of Visa Class B shares. (d) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commission in scope of ASC 606. (e) Corporate includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction.

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2019
Variable Interest Entities [Abstract]
Variable Interest Entities	Variable Interest Entities ASC 810 defines a VIE as a legal entity where (a) the equity investors, as a group, lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support, (b) the equity investors, as a group, lack either, (1) the power through voting rights, or similar rights, to direct the activities of an entity that most significantly impact the entity’s economic performance, (2) the obligation to absorb the expected losses of the entity, or (3) the right to receive the expected residual returns of the entity, or (c) the entity is structured with non-substantive voting rights. A variable interest is a contractual ownership or other interest that fluctuates with changes in the fair value of the VIE’s net assets exclusive of variable interests. Under ASC 810, as amended, a primary beneficiary is required to consolidate a VIE when it has a variable interest in a VIE that provides it with a controlling financial interest. For such purposes, the determination of whether a controlling financial interest exists is based on whether a single party has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could potentially be significant. Consolidated Variable Interest Entities During much of 2019, FHN held variable interests in a proprietary HELOC securitization trust it established as a source of liquidity for consumer lending operations. Based on its restrictive nature, the trust was considered a VIE as the holders of equity at risk did not have the power through voting rights or similar rights to direct the activities that most significantly impacted the trust’s economic performance. The retention of mortgage service rights ("MSR") and a residual interest resulted in FHN potentially absorbing losses or receiving benefits that were significant to the trust. FHN was considered the primary beneficiary, as it was assumed to have the power, as Master Servicer, to most significantly impact the activities of the VIE. Consolidation of the trust resulted in the recognition of the trust proceeds as restricted borrowings since the cash flows on the securitized loans could only be used to settle the obligations due to the holders of trust securities. Through first quarter 2016 the trust experienced a rapid amortization period and FHN was obligated to provide subordinated funding. During the period, cash payments from borrowers were accumulated to repay outstanding debt securities while FHN continued to make advances to borrowers when they drew on their lines of credit. FHN then transferred the newly generated receivables into the securitization trust. FHN was reimbursed for these advances only after other parties in the securitization had received all of the cash flows to which they were entitled. Amounts funded from monoline insurance policies were considered restricted term borrowings in FHN’s Consolidated Statements of Condition. Except for recourse due to breaches of representations and warranties made by FHN in connection with the sale of the loans to the trust, the creditors of the trust held no recourse to the assets of FHN. This securitization was resolved in fourth quarter 2019. FHN has established certain rabbi trusts related to deferred compensation plans offered to its employees. FHN contributes employee cash compensation deferrals to the trusts and directs the underlying investments made by the trusts. The assets of these trusts are available to FHN’s creditors only in the event that FHN becomes insolvent. These trusts are considered VIEs as there is no equity at risk in the trusts since FHN provided the equity interest to its employees in exchange for services rendered. FHN is considered the primary beneficiary of the rabbi trusts as it has the power to direct the activities that most significantly impact the economic performance of the rabbi trusts through its ability to direct the underlying investments made by the trusts. Additionally, FHN could potentially receive benefits or absorb losses that are significant to the trusts due to its right to receive any asset values in excess of liability payoffs and its obligation to fund any liabilities to employees that are in excess of a rabbi trust’s assets. The following table summarizes VIEs consolidated by FHN as of December 31, 2019 and December 31, 2018 : December 31, 2019 December 31, 2018 On-Balance Sheet Consumer Loan Securitization Rabbi Trusts Used for Deferred Compensation Plans On-Balance Sheet Consumer Loan Securitization Rabbi Trusts Used for Deferred Compensation Plans ( Dollars in thousands ) Carrying Value Carrying Value Carrying Value Carrying Value Assets: Cash and due from banks $ — N/A $ — N/A Loans, net of unearned income — N/A 16,213 N/A Less: Allowance for loan losses — N/A — N/A Total net loans — N/A 16,213 N/A Other assets — $ 91,873 35 $ 78,446 Total assets $ — $ 91,873 $ 16,248 $ 78,446 Liabilities: Term borrowings $ — N/A $ 2,981 N/A Other liabilities — $ 70,830 — $ 56,700 Total liabilities $ — $ 70,830 $ 2,981 $ 56,700 Nonconsolidated Variable Interest Entities Low Income Housing Partnerships. First Horizon Community Investment Group, Inc. ("FHCIG") (formerly First Tennessee Housing Corporation (“FTHC”)), a wholly-owned subsidiary of First Horizon Bank (formerly First Tennessee Bank National Association ("FTBNA"), makes equity investments as a limited partner in various partnerships that sponsor affordable housing projects utilizing the Low Income Housing Tax Credit (“LIHTC”) pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is to achieve a satisfactory return on capital and to support FHN’s community reinvestment initiatives. The activities of the limited partnerships include the identification, development, and operation of multi-family housing units that are leased to qualifying residential tenants generally within FHN’s primary geographic region. LIHTC partnerships are considered VIEs as FHCIG, the holder of the equity investment at risk, does not have the ability to direct the activities that most significantly affect the performance of the entity through voting rights or similar rights. FHCIG could absorb losses that are significant to the LIHTC partnerships as it has a risk of loss for its capital contributions and funding commitments to each partnership. The general partners are considered the primary beneficiaries as managerial functions give them the power to direct the activities that most significantly impact the entities’ economic performance and the managing members are exposed to all losses beyond FHCIG’s initial capital contributions and funding commitments. FHN accounts for all qualifying LIHTC investments under the proportional amortization method. Under this method an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense/(benefit). LIHTC investments that do not qualify for the proportional amortization method are accounted for using the equity method. Expenses associated with these investments were $ 1.3 million , $4.1 million , and $1.8 million during 2019 , 2018 , and 2017 , respectively. The following table summarizes the impact to the Provision/(benefit) for income taxes on the Consolidated Statements of Income for the years ended December 31, 2019 , 2018 and 2017 for LIHTC investments accounted for under the proportional amortization method. ( Dollars in thousands ) 2019 2018 2017 Provision/(benefit) for income taxes: Amortization of qualifying LIHTC investments $ 15,482 $ 10,793 $ 14,037 Low income housing tax credits (13,539 ) (10,232 ) (11,037 ) Other tax benefits related to qualifying LIHTC investments (5,677 ) (7,370 ) (5,045 ) Other Tax Credit Investments. First Tennessee New Markets Corporation (“FTNMC”), a wholly-owned subsidiary of First Horizon Bank, periodically makes equity investments through wholly-owned subsidiaries as a non-managing member in various limited liability companies (“LLCs”) that sponsor community development projects utilizing the New Market Tax Credit (“NMTC”) pursuant to Section 45 of the Internal Revenue Code. The purpose of these investments is to achieve a satisfactory return on capital and to support FHN’s community reinvestment initiatives. The activities of the LLCs include providing investment capital for low-income communities within FHN’s primary geographic region. A portion of the funding of FTNMC’s investment in a NMTC LLC is obtained via a loan from an unrelated third-party that is typically a community development enterprise. The NMTC LLCs are considered VIEs as FTNMC, the holder of the equity investment at risk, does not have the ability to direct the activities that most significantly affect the performance of the entity through voting rights or similar rights. While FTNMC could absorb losses that are significant to the NMTC LLCs as it has a risk of loss for its initial capital contributions, the managing members are considered the primary beneficiaries as managerial functions give them the power to direct the activities that most significantly impact the NMTC LLCs’ economic performance and the managing members are exposed to all losses beyond FTNMC’s initial capital contributions. A NMTC relationship was resolved in 2019 resulting in a $2.7 million decline in the related debt. FHCIG also makes equity investments as a limited partner or non-managing member in entities that receive Historic Tax Credits pursuant to Section 47 of the Internal Revenue Code. As of December 31, 2019, there were no remaining investments. The purpose of these entities is the rehabilitation of historic buildings with the tax credits provided to incent private investment in the historic cores of cities and towns. These entities are considered VIEs as FHCIG, the holder of the equity investment at risk, does not have the ability to direct the activities that most significantly affect the performance of the entity through voting rights or similar rights. FHCIG could absorb losses that are significant to the entities as it has a risk of loss for its capital contributions and funding commitments to each partnership. The managing members are considered the primary beneficiaries as managerial functions give them the power to direct the activities that most significantly impact the entities’ economic performance and the managing members are exposed to all losses beyond FHCIG’s initial capital contributions and funding commitments. Small Issuer Trust Preferred Holdings . First Horizon Bank holds variable interests in trusts which have issued mandatorily redeemable preferred capital securities (“trust preferreds”) for smaller banking and insurance enterprises. First Horizon Bank has no voting rights for the trusts’ activities. The trusts’ only assets are junior subordinated debentures of the issuing enterprises. The creditors of the trusts hold no recourse to the assets of First Horizon Bank. These trusts meet the definition of a VIE as the holders of the equity investment at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the trusts’ economic performance. Based on the nature of the trusts’ activities and the size of First Horizon Bank’s holdings, First Horizon Bank could potentially receive benefits or absorb losses that are significant to the trusts regardless of whether a majority of a trust’s securities are held by First Horizon Bank. However, since First Horizon Bank is solely a holder of the trusts’ securities, it has no rights which would give it the power to direct the activities that most significantly impact the trusts’ economic performance and thus it is not considered the primary beneficiary of the trusts. First Horizon Bank has no contractual requirements to provide financial support to the trusts. On-Balance Sheet Trust Preferred Securitization. In 2007, First Horizon Bank executed a securitization of certain small issuer trust preferreds for which the underlying trust meets the definition of a VIE as the holders of the equity investment at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entity’s economic performance. First Horizon Bank could potentially receive benefits or absorb losses that are significant to the trust based on the size and priority of the interests it retained in the securities issued by the trust. However, since First Horizon Bank did not retain servicing or other decision making rights, First Horizon Bank is not the primary beneficiary as it does not have the power to direct the activities that most significantly impact the trust’s economic performance. Accordingly, First Horizon Bank has accounted for the funds received through the securitization as a term borrowing in its Consolidated Statements of Condition. First Horizon Bank has no contractual requirements to provide financial support to the trust. Proprietary Residential Mortgage Securitizations. FHN holds variable interests (primarily principal-only strips) in proprietary residential mortgage securitization trusts it established prior to 2008 as a source of liquidity for its mortgage banking operations. Except for recourse due to breaches of representations and warranties made by FHN in connection with the sale of the loans to the trusts, the creditors of the trusts hold no recourse to the assets of FHN. Additionally, FHN has no contractual requirements to provide financial support to the trusts. Based on their restrictive nature, the trusts are considered VIEs as the holders of equity at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the trusts’ economic performance. However, FHN did not have the ability to participate in significant portions of a securitization trust’s cash flows and FHN was not considered the primary beneficiary of the trust. Therefore, these trusts were not consolidated by FHN. Holdings in Agency Mortgage-Backed Securities. FHN holds securities issued by various Agency securitization trusts. Based on their restrictive nature, the trusts meet the definition of a VIE since the holders of the equity investments at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entities’ economic performance. FHN could potentially receive benefits or absorb losses that are significant to the trusts based on the nature of the trusts’ activities and the size of FHN’s holdings. However, FHN is solely a holder of the trusts’ securities and does not have the power to direct the activities that most significantly impact the trusts’ economic performance, and is not considered the primary beneficiary of the trusts. FHN has no contractual requirements to provide financial support to the trusts. Commercial Loan Troubled Debt Restructurings. For certain troubled commercial loans, First Horizon Bank restructures the terms of the borrower’s debt in an effort to increase the probability of receipt of amounts contractually due. Following a troubled debt restructuring, the borrower entity typically meets the definition of a VIE as the initial determination of whether an entity is a VIE must be reconsidered as events have proven that the entity’s equity is not sufficient to permit it to finance its activities without additional subordinated financial support or a restructuring of the terms of its financing. As First Horizon Bank does not have the power to direct the activities that most significantly impact such troubled commercial borrowers’ operations, it is not considered the primary beneficiary even in situations where, based on the size of the financing provided, First Horizon Bank is exposed to potentially significant benefits and losses of the borrowing entity. First Horizon Bank has no contractual requirements to provide financial support to the borrowing entities beyond certain funding commitments established upon restructuring of the terms of the debt that allows for preparation of the underlying collateral for sale. Sale Leaseback Transaction . First Horizon Bank has entered into an agreement with a single asset leasing entity for the sale and leaseback of an office building. In conjunction with this transaction, First Horizon Bank loaned funds to a related party of the buyer that were used for the purchase price of the building. First Horizon Bank also entered into a construction loan agreement with the single asset entity for renovation of the building. Since this transaction did not qualify as a sale prior to 2019, it was accounted for using the deposit method which created a net asset or liability for all cash flows between First Horizon Bank and the buyer. Upon adoption of ASU 2016-02 the transaction qualified as a seller-financed sale-leaseback. The buyer-lessor in this transaction meets the definition of a VIE as it does not have sufficient equity at risk since First Horizon Bank is providing the funding for the purchase and renovation. A related party of the buyer-lessor has the power to direct the activities that most significantly impact the operations and could potentially receive benefits or absorb losses that are significant to the transactions, making it the primary beneficiary. Therefore, First Horizon Bank does not consolidate the leasing entity. Proprietary Trust Preferred Issuances . In conjunction with the acquisition of CBF, FHN acquired junior subordinated debt underlying multiple issuances of trust preferred debt by institutions previously acquired by CBF. All of the remaining trusts are considered VIEs because the ownership interests from the capital contributions to these trusts are not considered “at risk” in evaluating whether the holders of the equity investments at risk in the trusts have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entities’ economic performance. Thus, FHN cannot be the trusts’ primary beneficiary because its ownership interests in the trusts are not considered variable interests as they are not considered “at risk”. Consequently, none of the trusts are consolidated by FHN. The following table summarizes FHN’s nonconsolidated VIEs as of December 31, 2019 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type: Low income housing partnerships $ 237,668 $ 136,404 (a) Other tax credit investments (b) (c) 6,282 — Other assets Small issuer trust preferred holdings (d) 238,397 — Loans, net of unearned income On-balance sheet trust preferred securitization 33,265 80,908 (e) Proprietary residential mortgage securitizations 941 — Trading securities Holdings of agency mortgage-backed securities (d) 4,537,685 — (f) Commercial loan troubled debt restructurings (g) 45,169 — Loans, net of unearned income Sale-leaseback transaction 18,111 — (h) Proprietary trust preferred issuances (i) — 167,014 Term borrowings (a) Maximum loss exposure represents $101.3 million of current investments and $136.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2023. (b) A liability is not recognized as investments are written down over the life of the related tax credit. (c) Maximum loss exposure represents current investment balance. As of December 31, 2019, there were no investments funded through loans from community development enterprises. (d) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (e) Includes $112.5 million classified as Loans, net of unearned income, and $1.7 million classified as Trading securities which are offset by $80.9 million classified as Term borrowings. (f) Includes $.5 billion classified as Trading securities and $4.0 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $43.4 million of current receivables and $1.8 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (h) Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor. (i) No exposure to loss due to nature of FHN's involvement. The following table summarizes FHN’s nonconsolidated VIEs as of December 31, 2018 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type: Low income housing partnerships $ 156,056 $ 80,427 (a) Other tax credit investments (b) (c) 3,619 — Other assets Small issuer trust preferred holdings (d) 270,585 — Loans, net of unearned income On-balance sheet trust preferred securitization 37,532 76,642 (e) Proprietary residential mortgage securitizations 1,524 — Trading securities Holdings of agency mortgage-backed securities (d) 4,842,630 — (f) Commercial loan troubled debt restructurings (g) 40,590 — Loans, net of unearned income Sale-leaseback transaction 16,327 — (h) Proprietary trust preferred issuances (i) — 167,014 Term borrowings (a) Maximum loss exposure represents $75.6 million of current investments and $80.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2020. (b) A liability is not recognized as investments are written down over the life of the related tax credit. (c) Maximum loss exposure represents current investment balance. Of the initial investment, $2.7 million was funded through loans from community development enterprises. (d) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (e) Includes $112.5 million classified as Loans, net of unearned income, and $1.7 million classified as Trading securities which are offset by $76.6 million classified as Term borrowings. (f) Includes $.5 billion classified as Trading securities and $4.4 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $38.2 million of current receivables and $ 2.3 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (h) Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor. (i) No exposure to loss due to nature of FHN's involvement.

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives In the normal course of business, FHN utilizes various financial instruments (including derivative contracts and credit-related agreements) through its fixed income and risk management operations, as part of its risk management strategy and as a means to meet customers’ needs. Derivative instruments are subject to credit and market risks in excess of the amount recorded on the balance sheet as required by GAAP. The contractual or notional amounts of these financial instruments do not necessarily represent the amount of credit or market risk. However, they can be used to measure the extent of involvement in various types of financial instruments. Controls and monitoring procedures for these instruments have been established and are routinely reevaluated. The Asset/Liability Committee (“ALCO”) controls, coordinates, and monitors the usage and effectiveness of these financial instruments. Credit risk represents the potential loss that may occur if a party to a transaction fails to perform according to the terms of the contract. The measure of credit exposure is the replacement cost of contracts with a positive fair value. FHN manages credit risk by entering into financial instrument transactions through national exchanges, primary dealers or approved counterparties, and by using mutual margining and master netting agreements whenever possible to limit potential exposure. FHN also maintains collateral posting requirements with certain counterparties to limit credit risk. Daily margin posted or received with central clearinghouses is considered a legal settlement of the related derivative contracts which results in a net presentation for each contract in the Consolidated Statements of Condition. Treatment of daily margin as a settlement has no effect on hedge accounting or gains/losses for the applicable derivative contracts. On December 31, 2019 and 2018, respectively, $136.6 million and $76.0 million of cash receivables and $53.0 million and $34.0 million of cash payables related to collateral posting under master netting arrangements, inclusive of collateral posted related to contracts with adjustable collateral posting thresholds and over-collateralized positions, with derivative counterparties. With exchange-traded contracts, the credit risk is limited to the clearinghouse used. For non-exchange traded instruments, credit risk may occur when there is a gain in the fair value of the financial instrument and the counterparty fails to perform according to the terms of the contract and/or when the collateral proves to be of insufficient value. See additional discussion regarding master netting agreements and collateral posting requirements later in this note under the heading “Master Netting and Similar Agreements.” Market risk represents the potential loss due to the decrease in the value of a financial instrument caused primarily by changes in interest rates or the prices of debt instruments. FHN manages market risk by establishing and monitoring limits on the types and degree of risk that may be undertaken. FHN continually measures this risk through the use of models that measure value-at-risk and earnings-at-risk. Derivative Instruments. FHN enters into various derivative contracts both to facilitate customer transactions and as a risk management tool. Where contracts have been created for customers, FHN enters into upstream transactions with dealers to offset its risk exposure. Contracts with dealers that require central clearing are novated to a clearing agent who becomes FHN’s counterparty. Derivatives are also used as a risk management tool to hedge FHN’s exposure to changes in interest rates or other defined market risks. Forward contracts are over-the-counter contracts where two parties agree to purchase and sell a specific quantity of a financial instrument at a specified price, with delivery or settlement at a specified date. Futures contracts are exchange-traded contracts where two parties agree to purchase and sell a specific quantity of a financial instrument at a specified price, with delivery or settlement at a specified date. Interest rate option contracts give the purchaser the right, but not the obligation, to buy or sell a specified quantity of a financial instrument, at a specified price, during a specified period of time. Caps and floors are options that are linked to a notional principal amount and an underlying indexed interest rate. Interest rate swaps involve the exchange of interest payments at specified intervals between two parties without the exchange of any underlying principal. Swaptions are options on interest rate swaps that give the purchaser the right, but not the obligation, to enter into an interest rate swap agreement during a specified period of time. Trading Activities FHN’s fixed income segment trades U.S. Treasury, U.S. Agency, government-guaranteed loan, mortgage-backed, corporate and municipal fixed income securities, and other securities for distribution to customers. When these securities settle on a delayed basis, they are considered forward contracts. Fixed income also enters into interest rate contracts, including caps, swaps, and floors, for its customers. In addition, fixed income enters into futures and option contracts to economically hedge interest rate risk associated with a portion of its securities inventory. These transactions are measured at fair value, with changes in fair value recognized currently in fixed income noninterest income. Related assets and liabilities are recorded on the Consolidated Statements of Condition as Derivative assets and Derivative liabilities. The FHN Financial Risk Committee and the Credit Risk Management Committee collaborate to mitigate credit risk related to these transactions. Credit risk is controlled through credit approvals, risk control limits, and ongoing monitoring procedures. Total trading revenues were $228.4 million , $132.3 million and $173.9 million for the years ended December 31, 2019 , 2018 and 2017, respectively. Trading revenues are inclusive of both derivative and non-derivative financial instruments, and are included in Fixed income noninterest income. The following tables summarize FHN’s derivatives associated with fixed income trading activities as of December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts $ 2,697,522 $ 65,768 $ 6,858 Offsetting Upstream Interest Rate Contracts 2,697,522 2,583 3,994 Option Contracts Purchased 40,000 131 — Forwards and Futures Purchased 9,217,350 17,029 3,187 Forwards and Futures Sold 9,403,112 3,611 16,620 December 31, 2018 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts $ 2,271,448 $ 18,744 $ 27,768 Offsetting Upstream Interest Rate Contracts 2,271,448 4,014 9,041 Option Contracts Purchased 20,000 25 — Forwards and Futures Purchased 4,684,177 28,304 181 Forwards and Futures Sold 4,967,454 522 30,055 Interest Rate Risk Management FHN’s ALCO focuses on managing market risk by controlling and limiting earnings volatility attributable to changes in interest rates. Interest rate risk exists to the extent that interest-earning assets and interest-bearing liabilities have different maturity or repricing characteristics. FHN uses derivatives, primarily swaps, that are designed to moderate the impact on earnings as interest rates change. Interest paid or received for swaps utilized by FHN to hedge the fair value of long term debt is recognized as an adjustment of the interest expense of the liabilities whose risk is being managed. FHN’s interest rate risk management policy is to use derivatives to hedge interest rate risk or market value of assets or liabilities, not to speculate. In addition, FHN has entered into certain interest rate swaps and caps as a part of a product offering to commercial customers that includes customer derivatives paired with upstream offsetting market instruments that, when completed, are designed to mitigate interest rate risk. These contracts do not qualify for hedge accounting and are measured at fair value with gains or losses included in current earnings in Noninterest expense on the Consolidated Statements of Income. FHN designated a derivative transaction in a hedging strategy to manage interest rate risk on $400.0 million of senior debt issued by First Horizon Bank prior to its maturity December 2019. This qualified for hedge accounting under ASC 815-20 using the long-haul method. FHN entered into a pay floating, receive fixed interest rate swap to hedge the interest rate risk of the senior debt. First Horizon bank early redeemed the $400.0 million senior debt on November 1, 2019. FHN has designated a derivative transaction in a hedging strategy to manage interest rate risk on $500.0 million of senior debt which matures in December 2020. This qualifies for hedge accounting under ASC 815-20 using the long-haul method. FHN entered into a pay floating, receive fixed interest rate swap to hedge the interest rate risk of the senior debt. The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer Interest Rate Contracts $ 3,044,067 $ 90,394 $ 3,515 Offsetting Upstream Interest Rate Contracts 3,044,067 3,537 9,735 Debt Hedging Hedging Instruments: Interest Rate Swaps $ 500,000 N/A $ 69 Hedged Items: Term Borrowings: Par N/A N/A $ 500,000 Cumulative fair value hedging adjustments N/A N/A (1,604 ) Unamortized premium/(discount) and issuance costs N/A N/A (740 ) Total carrying value N/A N/A $ 497,656 December 31, 2018 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer Interest Rate Contracts $ 2,029,162 $ 20,262 $ 25,880 Offsetting Upstream Interest Rate Contracts 2,029,162 8,154 9,153 Debt Hedging Hedging Instruments: Interest Rate Swaps $ 900,000 $ 127 $ 6 Hedged Items: Term Borrowings: Par N/A N/A $ 900,000 Cumulative fair value hedging adjustments N/A N/A (15,094 ) Unamortized premium/(discount) and issuance costs N/A N/A (2,295 ) Total carrying value N/A N/A $ 882,611 The following table summarizes gains/(losses) on FHN’s derivatives associated with interest rate risk management activities for the years ended December 31, 2019 , 2018 , and 2017: Year Ended December 31 2019 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer Interest Rate Contracts (a) $ 92,497 $ 1,779 (10,703 ) Offsetting Upstream Interest Rate Contracts (a) (92,497 ) (1,779 ) 10,699 Debt Hedging Hedging Instruments: Interest Rate Swaps (b) $ 13,240 $ (1,648 ) $ (7,766 ) Hedged Items: Term Borrowings (a) (c) (13,234 ) 1,622 7,582 (a) Gains/losses included in All other expense within the Consolidated Statements of Income. (b) Gains/losses included in the Interest expense for 2019 and 2018, and All other expense for 2017 within the Consolidated Statement of Income. (c) Represents gains and losses attributable to changes in fair value due to interest rate risk as designated in ASC 815-20 hedging relationships. In first quarter 2016, FHN entered into a pay floating, receive fixed interest rate swap in a hedging strategy to manage its exposure to the variability in cash flows related to the interest payments for the following five years on $250 million principal of debt instruments, which primarily consist of held-to-maturity trust preferred loans that have variable interest payments based on 3-month LIBOR. In first quarter 2017, FHN initiated cash flow hedges of $650 million notional amount that had initial durations between three years and seven years . The debt instruments primarily consist of held-to-maturity commercial loans that have variable interest payments based on 1-month LIBOR. These qualify for hedge accounting as cash flow hedges under ASC 815-20. Subsequent to 2017, all changes in the fair value of these derivatives are recorded as a component of AOCI. Amounts are reclassified from AOCI to earnings as the hedged cash flows affect earnings. Prior to 2018, FHN measured ineffectiveness using the Hypothetical Derivative Method and AOCI was adjusted to an amount that reflected the lesser of either the cumulative change in fair value of the swaps or the cumulative change in the fair value of the hypothetical derivative instruments. To the extent that any ineffectiveness existed in the hedge relationships, the amounts were recorded in current period earnings. Interest paid or received for these swaps is recognized as an adjustment to interest income of the assets whose cash flows are being hedged. The following tables summarize FHN’s derivative activities associated with cash flow hedges as of December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest Rate Swaps $ 900,000 N/A $ 241 Hedged Items: Variability in Cash Flows Related to Debt Instruments (Primarily Loans) N/A $ 900,000 N/A December 31, 2018 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest Rate Swaps $ 900,000 $ 888 $ 5 Hedged Items: Variability in Cash Flows Related to Debt Instruments (Primarily Loans) N/A $ 900,000 N/A The following table summarizes gains/(losses) on FHN’s derivatives associated with cash flow hedges for the years ended December 31, 2019 , 2018 , and 2017: Year Ended December 31 2019 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Cash Flow Hedges Hedging Instruments: Interest Rate Swaps (a) $ 20,625 $ (5,502 ) $ (8,264 ) Gain/(loss) recognized in Other comprehensive income/(loss) 11,234 (6,284 ) (2,156 ) Gain/(loss) reclassified from AOCI into Interest income 4,105 2,142 (2,945 ) (a) Approximately $1.0 million of cumulative gains are expected to be reclassified into earnings in the next twelve months. Other Derivatives In conjunction with the sales of a portion of its Visa Class B shares in 2010 and 2011, FHN and the purchaser entered into derivative transactions whereby FHN will make or receive cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. FHN is also required to make periodic financing payments to the purchasers until all of Visa's covered litigation matters are resolved. In third quarter 2018, FHN sold the remainder of its Visa Class B shares, entering into a similar derivative arrangement with the counterparty. All of these derivatives extend until the end of Visa’s Covered Litigation matters. In September 2018, Visa reached a preliminary settlement for one class of plaintiffs in its Payment Card Interchange matter, which later received final court approval in December 2019. In accordance with the agreement terms, several individual plaintiffs opted out of the settlement and have the opportunity to separately pursue resolution with Visa. Settlement has not been reached with the second class of plaintiffs in this matter and other covered litigation matters are also pending judicial resolution. Accordingly, the value and timing for completion of Visa’s Covered Litigation matters are uncertain. The derivative transaction executed in third quarter 2018 includes a contingent accelerated termination clause based on the credit ratings of FHN and First Horizon Bank. FHN has not received or paid collateral related to this contract. As of December 31, 2019 and December 31, 2018, the derivative liabilities associated with the sales of Visa Class B shares were $22.8 million and $31.5 million , respectively. See Note 24 - Fair Value of Assets & Liabilities for discussion of the valuation inputs and processes for these Visa-related derivatives. FHN utilizes cross currency swaps and cross currency interest rate swaps to economically hedge its exposure to foreign currency risk and interest rate risk associated with non-U.S. dollar denominated loans. As of December 31, 2019 and December 31, 2018, these loans were valued at $18.4 million and $11.0 million , respectively. The balance sheet amount and the gains/losses associated with these derivatives were not significant. Master Netting and Similar Agreements As previously discussed, FHN uses master netting agreements, mutual margining agreements and collateral posting requirements to minimize credit risk on derivative contracts. Master netting and similar agreements are used when counterparties have multiple derivatives contracts that allow for a “right of setoff,” meaning that a counterparty may net offsetting positions and collateral with the same counterparty under the contract to determine a net receivable or payable. The following discussion provides an overview of these arrangements which may vary due to the derivative type and market in which a derivative transaction is executed. Interest rate derivatives are subject to agreements consistent with standard agreement forms of the International Swap and Derivatives Association (“ISDA”). Currently, all interest rate derivative contracts are entered into as over-the-counter transactions and collateral posting requirements are based on the net asset or liability position with each respective counterparty. For contracts that require central clearing, novation to a counterparty with access to a clearinghouse occurs and margin is posted. Cash margin received (posted) that is considered settlements for the derivative contracts is included in the respective derivative asset (liability) value. Cash margin that is considered collateral received (posted) for interest rate derivatives is recognized as a liability (asset) on FHN’s Consolidated Statements of Condition. Interest rate derivatives with customers that are smaller financial institutions typically require posting of collateral by the counterparty to FHN. This collateral is subject to a threshold with daily adjustments based upon changes in the level or fair value of the derivative position. Positions and related collateral can be netted in the event of default. Collateral pledged by a counterparty is typically cash or securities. The securities pledged as collateral are not recognized within FHN’s Consolidated Statements of Condition. Interest rate derivatives associated with lending arrangements share the collateral with the related loan(s). The derivative and loan positions may be netted in the event of default. For disclosure purposes, the entire collateral amount is allocated to the loan. Interest rate derivatives with larger financial institutions entered into prior to required central clearing typically contain provisions whereby the collateral posting thresholds under the agreements adjust based on the credit ratings of both counterparties. If the credit rating of FHN and/or First Horizon Bank is lowered, FHN could be required to post additional collateral with the counterparties. Conversely, if the credit rating of FHN and/or First Horizon Bank is increased, FHN could have collateral released and be required to post less collateral in the future. Also, if a counterparty’s credit ratings were to decrease, FHN and/or First Horizon Bank could require the posting of additional collateral; whereas if a counterparty’s credit ratings were to increase, the counterparty could require the release of excess collateral. Collateral for these arrangements is adjusted daily based on changes in the net fair value position with each counterparty. The net fair value, determined by individual counterparty, of all derivative instruments with adjustable collateral posting thresholds was $63.1 million of assets and $6.4 million of liabilities on December 31, 2019 , and $15.0 million of assets and $34.9 million of liabilities on December 31, 2018 . As of December 31, 2019 and 2018, FHN had received collateral of $148.5 million and $80.2 million and posted collateral of $18.4 million and $13.3 million , respectively, in the normal course of business related to these agreements. Certain agreements entered into prior to required central clearing also contain accelerated termination provisions, inclusive of the right of offset, if a counterparty’s credit rating falls below a specified level. If a counterparty’s debt rating (including FHN’s and First Horizon Bank's) were to fall below these minimums, these provisions would be triggered, and the counterparties could terminate the agreements and require immediate settlement of all derivative contracts under the agreements. The net fair value, determined by individual counterparty, of all derivative instruments with credit-risk-related contingent accelerated termination provisions was $63.1 million of assets and $10.3 million of liabilities on December 31, 2019 , and $19.0 million of assets and $33.2 million of liabilities on December 31, 2018 . As of December 31, 2019 and 2018, FHN had received collateral of $148.5 million and $84.5 million and posted collateral of $22.7 million and $15.2 million , respectively, in the normal course of business related to these contracts. FHN’s fixed income segment buys and sells various types of securities for its customers. When these securities settle on a delayed basis, they are considered forward contracts, and are generally not subject to master netting agreements. For futures and options, FHN transacts through a third party, and the transactions are subject to margin and collateral maintenance requirements. In the event of default, open positions can be offset along with the associated collateral. For this disclosure, FHN considers the impact of master netting and other similar agreements which allow FHN to settle all contracts with a single counterparty on a net basis and to offset the net derivative asset or liability position with the related securities and cash collateral. The application of the collateral cannot reduce the net derivative asset or liability position below zero, and therefore any excess collateral is not reflected in the following tables. The following table provides details of derivative assets and collateral received as presented on the Consolidated Statements of Condition as of December 31, 2019 and 2018: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized assets Gross amounts offset in the Statements of Condition Net amounts of assets presented in the Statements of Condition (a) Derivative liabilities available for offset Collateral Received Net amount Derivative assets: December 31, 2019 (b) $ 162,344 $ — $ 162,344 $ (5,604 ) $ (143,334 ) $ 13,406 December 31, 2018 (b) 52,562 — 52,562 (12,745 ) (39,637 ) 180 (a) Included in Derivative assets on the Consolidated Statements of Condition. As of December 31, 2019 and 2018, $20.8 million and $28.9 million , respectively, of derivative assets (primarily fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements. (b) Amounts are comprised entirely of interest rate derivative contracts. The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Statements of Condition as of December 31, 2019 and 2018: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized liabilities Gross amounts offset in the Statements of Condition Net amounts of liabilities presented in the Statements of Condition (a) Derivative assets available for offset Collateral pledged Net amount Derivative liabilities: December 31, 2019 (b) $ 24,431 $ — $ 24,431 $ (5,604 ) $ (18,689 ) $ 138 December 31, 2018 (b) 71,853 — 71,853 (12,745 ) (54,773 ) 4,335 (a) Included in Derivative liabilities on the Consolidated Statements of Condition. As of December 31, 2019 and 2018, $43.0 million and $61.9 million , respectively, of derivative liabilities (primarily Visa-related derivatives and fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements. (b) Amounts are comprised entirely of interest rate derivative contracts.

Master Netting and Similar Agre

Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions	12 Months Ended
	Dec. 31, 2019
Offsetting [Abstract]
Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions	Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions For repurchase, reverse repurchase and securities borrowing transactions, FHN and each counterparty have the ability to offset all open positions and related collateral in the event of default. Due to the nature of these transactions, the value of the collateral for each transaction approximates the value of the corresponding receivable or payable. For repurchase agreements through FHN’s fixed income business (Securities purchased under agreements to resell and Securities sold under agreements to repurchase), transactions are collateralized by securities and/or government guaranteed loans which are delivered on the settlement date and are maintained throughout the term of the transaction. For FHN’s repurchase agreements through banking activities (Securities sold under agreements to repurchase), securities are typically pledged at settlement and not released until maturity. For asset positions, the collateral is not included on FHN’s Consolidated Statements of Condition. For liability positions, securities collateral pledged by FHN is generally represented within FHN’s trading or available-for-sale securities portfolios. For this disclosure, FHN considers the impact of master netting and other similar agreements that allow FHN to settle all contracts with a single counterparty on a net basis and to offset the net asset or liability position with the related securities collateral. The application of the collateral cannot reduce the net asset or liability position below zero, and therefore any excess collateral is not reflected in the tables below. The following table provides details of Securities purchased under agreements to resell as presented on the Consolidated Statements of Condition and collateral pledged by counterparties as of December 31: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized assets Gross amounts offset in the Statements of Condition Net amounts of assets presented in the Statements of Condition Offsetting securities sold under agreements to repurchase Securities collateral (not recognized on FHN’s Statements of Condition) Net amount Securities purchased under agreements to resell: 2019 $ 586,629 $ — $ 586,629 $ (21,004 ) $ (562,702 ) $ 2,923 2018 386,443 — 386,443 (261 ) (382,756 ) 3,426 The following table provides details of Securities sold under agreements to repurchase as presented on the Consolidated Statements of Condition and collateral pledged by FHN as of December 31: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized liabilities Gross amounts offset in the Statements of Condition Net amounts of liabilities presented in the Statements of Condition Offsetting securities purchased under agreements to resell Securities/ government guaranteed loans collateral Net amount Securities sold under agreements to repurchase: 2019 $ 716,925 $ — $ 716,925 $ (21,004 ) $ (695,879 ) $ 42 2018 762,592 — 762,592 (261 ) (762,322 ) 9 Due to the short duration of Securities sold under agreements to repurchase and the nature of collateral involved, the risks associated with these transactions are considered minimal. The following tables provide details, by collateral type, of the remaining contractual maturity of Securities sold under agreements to repurchase as of December 31: December 31, 2019 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 41,364 $ — $ 41,364 Government agency issued MBS 341,173 4,545 345,718 Other U.S. government agencies 54,924 — 54,924 Government guaranteed loans (SBA and USDA) 274,919 — 274,919 Total Securities sold under agreements to repurchase $ 712,380 $ 4,545 $ 716,925 December 31, 2018 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 16,321 $ — $ 16,321 Government agency issued MBS 414,488 5,220 419,708 Government agency issued CMO 36,688 — 36,688 Government guaranteed loans (SBA and USDA) 289,875 — 289,875 Total Securities sold under agreements to repurchase $ 757,372 $ 5,220 $ 762,592

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities FHN groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. This hierarchy requires FHN to maximize the use of observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. Each fair value measurement is placed into the proper level based on the lowest level of significant input. These levels are: • Level 1—Valuation is based upon quoted prices for identical instruments traded in active markets. • Level 2—Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3—Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models, and similar techniques. Recurring Fair Value Measurements The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2019 : December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 134,844 $ — $ 134,844 Government agency issued MBS — 268,024 — 268,024 Government agency issued CMO — 250,652 — 250,652 Other U.S. government agencies — 124,972 — 124,972 States and municipalities — 120,744 — 120,744 Corporate and other debt — 445,253 — 445,253 Equity, mutual funds, and other — 777 — 777 Total trading securities—fixed income — 1,345,266 — 1,345,266 Trading securities—mortgage banking — — 941 941 Loans held-for-sale (elected fair value) — — 14,033 14,033 Securities available-for-sale: U.S. treasuries — 100 — 100 Government agency issued MBS — 2,348,517 — 2,348,517 Government agency issued CMO — 1,670,492 — 1,670,492 Other U.S. government agencies — 306,092 — 306,092 States and municipalities — 60,526 — 60,526 Corporate and other debt — 40,540 — 40,540 Interest-Only Strip (elected fair value) — — 19,136 19,136 Total securities available-for-sale — 4,426,267 19,136 4,445,403 Other assets: Deferred compensation mutual funds 46,815 — — 46,815 Equity, mutual funds, and other 22,643 — — 22,643 Derivatives, forwards and futures 20,640 — — 20,640 Derivatives, interest rate contracts — 162,413 — 162,413 Derivatives, other — 62 — 62 Total other assets 90,098 162,475 — 252,573 Total assets $ 90,098 $ 5,934,008 $ 34,110 $ 6,058,216 Trading liabilities—fixed income: U.S. treasuries $ — $ 406,380 $ — $ 406,380 Other U.S.government agencies — 88 — 88 Government agency issued MBS — 33 — 33 Corporate and other debt — 99,080 — 99,080 Total trading liabilities—fixed income — 505,581 — 505,581 Other liabilities: Derivatives, forwards and futures 19,807 — — 19,807 Derivatives, interest rate contracts — 24,412 — 24,412 Derivatives, other — 466 22,795 23,261 Total other liabilities 19,807 24,878 22,795 67,480 Total liabilities $ 19,807 $ 530,459 $ 22,795 $ 573,061 The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2018 : December 31, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 169,799 $ — $ 169,799 Government agency issued MBS — 133,373 — 133,373 Government agency issued CMO — 330,456 — 330,456 Other U.S. government agencies — 76,733 — 76,733 States and municipalities — 54,234 — 54,234 Corporates and other debt — 682,068 — 682,068 Equity, mutual funds, and other — (19 ) — (19 ) Total trading securities—fixed income — 1,446,644 — 1,446,644 Trading securities—mortgage banking — — 1,524 1,524 Loans held-for-sale (elected fair value) — — 16,273 16,273 Securities available-for-sale: U.S. treasuries — 98 — 98 Government agency issued MBS — 2,420,106 — 2,420,106 Government agency issued CMO — 1,958,695 — 1,958,695 Other U.S. government agencies — 149,786 — 149,786 States and municipalities — 32,573 — 32,573 Corporate and other debt — 55,310 — 55,310 Interest-only strips (elected fair value) — — 9,902 9,902 Total securities available-for-sale — 4,616,568 9,902 4,626,470 Other assets: Deferred compensation mutual funds 37,771 — — 37,771 Equity, mutual funds, and other 22,248 — — 22,248 Derivatives, forwards and futures 28,826 — — 28,826 Derivatives, interest rate contracts — 52,214 — 52,214 Derivatives, other — 435 — 435 Total other assets 88,845 52,649 — 141,494 Total assets $ 88,845 $ 6,115,861 $ 27,699 $ 6,232,405 Trading liabilities—fixed income: U.S. treasuries $ — $ 207,739 $ — $ 207,739 Other U.S. government agencies — 98 — 98 Corporates and other debt — 127,543 — 127,543 Total trading liabilities—fixed income — 335,380 — 335,380 Other liabilities: Derivatives, forwards and futures 30,236 — — 30,236 Derivatives, interest rate contracts — 71,853 — 71,853 Derivatives, other — 84 31,540 31,624 Total other liabilities 30,236 71,937 31,540 133,713 Total liabilities $ 30,236 $ 407,317 $ 31,540 $ 469,093 Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the years ended December 31, 2019 , 2018 and 2017 on a recurring basis are summarized as follows: Year Ended December 31, 2019 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2019 $ 1,524 $ 9,902 $ 16,273 $ (31,540 ) Total net gains/(losses) included in: Net income (285 ) (4,725 ) 1,828 (3,946 ) Purchases — 86 10 — Sales — (47,469 ) — — Settlements (298 ) — (4,078 ) 12,691 Net transfers into/(out of) Level 3 — 61,342 (b) — (d) — Balance on December 31, 2019 $ 941 $ 19,136 $ 14,033 $ (22,795 ) Net unrealized gains/(losses) included in net income $ (66 ) (a) $ (1,984 ) (c) $ 1,828 (a) $ (3,946 ) (e) Year Ended December 31, 2018 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2018 $ 2,151 $ 1,270 $ 18,926 $ (5,645 ) Total net gains/(losses) included in: Net income 173 (398 ) 1,239 (4,677 ) Purchases — — 62 (28,100 ) (f) Sales — (16,840 ) — — Settlements (800 ) — (3,598 ) 6,882 Net transfers into/(out of) Level 3 — 25,870 (b) (356 ) (d) — Balance on December 31, 2018 $ 1,524 $ 9,902 $ 16,273 $ (31,540 ) Net unrealized gains/(losses) included in net income $ 6 (a) $ (1,025 ) (c) $ 1,239 (a) $ (4,677 ) (e) Year Ended December 31, 2017 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2017 $ 2,573 $ — $ 21,924 $ (6,245 ) Total net gains/(losses) included in: Net income 448 1,021 1,547 (596 ) Purchases — 1,413 168 — Sales (5 ) (11,431 ) — — Settlements (865 ) — (4,346 ) 1,196 Net transfers into/(out of) Level 3 — 10,267 (b) (367 ) (d) — Balance on December 31, 2017 $ 2,151 $ 1,270 $ 18,926 $ (5,645 ) Net unrealized gains/(losses) included in net income $ 303 (a) $ (171 ) (c) $ 1,547 (a) $ (596 ) (e) (a) Primarily included in mortgage banking income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held-for-sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Transfers out of loans held-for-sale level 3 measured on a recurring basis generally reflect movements into OREO (level 3 nonrecurring). (e) Included in Other expense. (f) Increase related to Visa-related derivatives, see Note 22-Derivatives. There were no net unrealized gains/(losses) for Level 3 assets and liabilities included in other comprehensive income as of December 31, 2019 , 2018 and 2017 . Nonrecurring Fair Value Measurements From time to time, FHN may be required to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market (“LOCOM”) accounting or write-downs of individual assets. For assets measured at fair value on a nonrecurring basis which were still held on the balance sheet at December 31, 2019 , 2018 and 2017 , respectively, the following tables provide the level of valuation assumptions used to determine each adjustment, the related carrying value, and the fair value adjustments recorded during the respective periods. Carrying value at December 31, 2019 Year Ended December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Net gains/(losses) Loans held-for-sale—SBAs and USDA $ — $ 492,595 $ 929 $ 493,524 $ (1,817 ) Loans held-for-sale—first mortgages — — 516 516 32 Loans, net of unearned income (a) — — 42,208 42,208 (7,341 ) OREO (b) — — 15,660 15,660 (927 ) Other assets (c) — — 10,608 10,608 (1,809 ) $ (11,862 ) Carrying value at December 31, 2018 Year Ended December 31, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Net gains/(losses) Loans held-for-sale—other consumer $ — $ 18,712 $ — $ 18,712 $ (1,809 ) Loans held-for-sale—SBAs and USDA — 577,280 1,011 578,291 (2,541 ) Loans held-for-sale—first mortgages — — 541 541 13 Loans, net of unearned income (a) — — 48,259 48,259 (841 ) OREO (b) — — 22,387 22,387 (2,599 ) Other assets (c) — — 8,845 8,845 (4,712 ) $ (12,489 ) Carrying value at December 31, 2017 Year Ended December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total Net gains/(losses) Loans held-for-sale—SBAs and USDA $ — $ 465,504 $ 1,473 $ 466,977 $ (1,629 ) Loans held-for-sale—first mortgages — — 618 618 36 Loans, net of unearned income (a) — — 26,666 26,666 (1,687 ) OREO (b) — — 39,566 39,566 (996 ) Other assets (c) — — 26,521 26,521 (3,468 ) $ (7,744 ) (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. In 2019, FHN recognized $4.6 million of impairments and $.7 million of impairment reversals, respectively, related to dispositions of acquired properties and $1.5 million of impairments for lease assets related to continuing acquisition integration efforts associated with reduction of leased office space and branch optimization. Related to its restructuring, repositioning, and efficiency efforts, FHN recognized $14.0 million of impairments and $1.4 million of impairment reversals, respectively, for tangible long-lived assets and lease assets. Related to the Company's rebranding initiative, FHN recognized $7.1 million of impairments within the Corporate segment for long-lived tangible assets, primarily signage, related to the company's rebranding initiative. These amounts were recognized in the Corporate segment. In 2018, FHN recognized $3.9 million of impairments of long-lived assets in its Corporate segment primarily related to optimization efforts for its facilities. Also, in 2018, $1.5 million of impairment charges previously recognized in 2017 in the Corporate segment were reversed based on the disposition prices for the applicable locations. In 2017, FHN recognized $3.0 million and $.8 million of impairments on long-lived assets in its corporate and regional banking segments, respectively, associated with efforts to more efficiently utilize its branch locations, including integration with branches acquired from CBF. Lease asset impairments recognized in 2019 represent the reduction in value of the right-of-use assets associated with leases that are being exited in advance of the contractual lease expiration. Impairments are measured using a discounted cash flow methodology, which is considered a Level 3 valuation. For all periods, impairments of long-lived tangible assets reflect locations where the associated land and building are either owned or leased. The fair values of owned sites were determined using estimated sales prices from appraisals and broker opinions less estimated costs to sell with adjustments upon final disposition. The fair values of owned assets in leased sites (e.g., leasehold improvements) were determined using a discounted cash flow approach, based on the revised estimated useful lives of the related assets. Both measurement methodologies are considered Level 3 valuations. Impairment adjustments recognized upon disposition of a location are considered Level 2 valuations. Level 3 Measurements The following tables provide information regarding the unobservable inputs utilized in determining the fair value of level 3 recurring and non-recurring measurements as of December 31, 2019 and 2018 : (Dollars in thousands) Values Utilized Level 3 Class Fair Value at Valuation Techniques Unobservable Input Range Weighted Average (d) Available-for-sale- securities SBA-interest only strips $ 19,136 Discounted cash flow Constant prepayment rate 12% 12% Bond equivalent yield 16% - 17% 16% Loans held-for-sale - residential real estate 14,549 Discounted cash flow Prepayment speeds - First mortgage 3% - 14% 4.1% Prepayment speeds - HELOC 0% - 12% 7.6% Foreclosure losses 50% - 66% 64% Loss severity trends - First mortgage 3% - 24% of UPB 14.3% Loss severity trends - HELOC 0% - 72% of UPB 50% Loans held-for-sale- unguaranteed interest in SBA loans 929 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 9% 9% Derivative liabilities, other 22,795 Discounted cash flow Visa covered litigation resolution amount $5.4 billion - $6.0 billion $5.8 billion Probability of resolution scenarios 10% - 50% 16% Time until resolution 15 - 39 months 29 months Loans, net of unearned 42,208 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 15,660 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 10,608 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value (Dollars in thousands) Values Utilized Level 3 Class Fair Value at Valuation Techniques Unobservable Input Range Weighted Average (d) Available-for-sale- securities SBA-interest only strips $ 9,902 Discounted cash flow Constant prepayment rate 11% - 12% 11% Bond equivalent yield 14% - 15% 14% Loans held-for-sale - residential real estate 16,815 Discounted cash flow Prepayment speeds - First mortgage 2% - 10% 3% Prepayment speeds - HELOC 5% - 12% 7.5% Foreclosure losses 50% - 66% 63% Loss severity trends - First mortgage 2% - 25% of UPB 17% Loss severity trends - HELOC 50% - 100% of UPB 50% Loans held-for-sale- unguaranteed interest in SBA loans 1,011 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 9% 9% Derivative liabilities, other 31,540 Discounted cash flow Visa covered litigation resolution amount $5.0 billion - $5.8 billion $5.6 billion Probability of resolution scenarios 10% - 25% 23% Time until resolution 18 - 48 months 36 months Loans, net of unearned 48,259 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 22,387 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 8,845 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value Securities AFS . Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of SBA interest only strips. Management additionally considers whether the loans underlying related SBA-interest only strips are delinquent, in default or prepaying, and adjusts the fair value down 20 - 100% depending on the length of time in default. Loans held-for-sale. Foreclosure losses and prepayment rates are significant unobservable inputs used in the fair value measurement of FHN’s residential real estate loans held-for-sale. Loss severity trends are also assessed to evaluate the reasonableness of fair value estimates resulting from discounted cash flows methodologies as well as to estimate fair value for newly repurchased loans and loans that are near foreclosure. Significant increases (decreases) in any of these inputs in isolation would result in significantly lower (higher) fair value measurements. All observable and unobservable inputs are re-assessed quarterly. Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of unguaranteed interests in SBA loans. Unguaranteed interest in SBA loans held-for-sale are carried at less than the outstanding balance due to credit risk estimates. Credit risk adjustments may be reduced if prepayment is likely or as consistent payment history is realized. Management also considers other factors such as delinquency or default and adjusts the fair value accordingly. Derivative liabilities. In conjunction with the sales of portions of its Visa Class B shares, FHN and the purchasers entered into derivative transactions whereby FHN will make, or receive, cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. FHN uses a discounted cash flow methodology in order to estimate the fair value of FHN’s derivative liabilities associated with its prior sales of Visa Class B shares. The methodology includes estimation of both the resolution amount for Visa’s Covered Litigation matters as well as the length of time until the resolution occurs. Significant increases (decreases) in either of these inputs in isolation would result in significantly higher (lower) fair value measurements for the derivative liabilities. Additionally, FHN performs a probability weighted multiple resolution scenario to calculate the estimated fair value of these derivative liabilities. Assignment of higher (lower) probabilities to the larger potential resolution scenarios would result in an increase (decrease) in the estimated fair value of the derivative liabilities. Since this estimation process requires application of judgment in developing significant unobservable inputs used to determine the possible outcomes and the probability weighting assigned to each scenario, these derivatives have been classified within Level 3 in fair value measurements disclosures. Loans, net of unearned income and Other Real Estate Owned. Collateral-dependent loans and OREO are primarily valued using appraisals based on sales of comparable properties in the same or similar markets. Other collateral (receivables, inventory, equipment, etc.) is valued through borrowing base certificates, financial statements and/or auction valuations. These valuations are discounted based on the quality of reporting, knowledge of the marketability/collectability of the collateral and historical disposition rates. Other assets – tax credit investments. The estimated fair value of tax credit investments accounted for under the equity method is generally determined in relation to the yield (i.e., future tax credits to be received) an acquirer of these investments would expect in relation to the yields experienced on current new issue and/or secondary market transactions. Thus, as tax credits are recognized, the future yield to a market participant is reduced, resulting in consistent impairment of the individual investments. Individual investments are reviewed for impairment quarterly, which may include the consideration of additional marketability discounts related to specific investments which typically includes consideration of the underlying property’s appraised value. Fair Value Option FHN has elected the fair value option on a prospective basis for almost all types of mortgage loans originated for sale purposes under the Financial Instruments Topic (“ASC 825”) except for mortgage origination operations which utilize the platform acquired from CBF. FHN determined that the election reduces certain timing differences and better matches changes in the value of such loans with changes in the value of derivatives and forward delivery commitments used as economic hedges for these assets at the time of election. Repurchased loans are recognized within loans held-for-sale at fair value at the time of repurchase, which includes consideration of the credit status of the loans and the estimated liquidation value. FHN has elected to continue recognition of these loans at fair value in periods subsequent to reacquisition. Due to the credit-distressed nature of the vast majority of repurchased loans and the related loss severities experienced upon repurchase, FHN believes that the fair value election provides a more timely recognition of changes in value for these loans that occur subsequent to repurchase. Absent the fair value election, these loans would be subject to valuation at the LOCOM value, which would prevent subsequent values from exceeding the initial fair value, determined at the time of repurchase, but would require recognition of subsequent declines in value. Thus, the fair value election provides for a more timely recognition of any potential future recoveries in asset values while not affecting the requirement to recognize subsequent declines in value. The following tables reflect the differences between the fair value carrying amount of residential real estate loans held-for-sale measured at fair value in accordance with management’s election and the aggregate unpaid principal amount FHN is contractually entitled to receive at maturity. December 31, 2019 (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Fair value carrying amount less aggregate unpaid principal Residential real estate loans held-for-sale reported at fair value: Total loans $ 14,033 $ 19,278 $ (5,245 ) Nonaccrual loans 3,532 6,646 (3,114 ) Loans 90 days or more past due and still accruing 163 268 (105 ) December 31, 2018 (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Fair value carrying amount less aggregate unpaid principal Residential real estate loans held-for-sale reported at fair value: Total loans $ 16,273 $ 23,567 $ (7,294 ) Nonaccrual loans 4,536 8,128 (3,592 ) Loans 90 days or more past due and still accruing 171 281 (110 ) Assets and liabilities accounted for under the fair value election are initially measured at fair value with subsequent changes in fair value recognized in earnings. Such changes in the fair value of assets and liabilities for which FHN elected the fair value option are included in current period earnings with classification in the income statement line item reflected in the following table: Year Ended December 31 (Dollars in thousands) 2019 2018 2017 Changes in fair value included in net income: Mortgage banking noninterest income Loans held-for-sale $ 1,828 $ 1,239 $ 1,547 For the years ended December 31, 2019 , 2018 and 2017 , the amounts for residential real estate loans held-for-sale included gains of $.4 million , $.2 million , and $.5 million , respectively, in pretax earnings that are attributable to changes in instrument-specific credit risk. The portion of the fair value adjustments related to credit risk was determined based on estimated default rates and estimated loss severities. Interest income on residential real estate loans held-for-sale measured at fair value is calculated based on the note rate of the loan and is recorded in the interest income section of the Consolidated Statements of Income as interest on loans held-for-sale. FHN has elected to account for retained interest-only strips from guaranteed SBA loans recorded in available-for-sale securities at fair value through earnings. Since these securities are subject to the risk that prepayments may result in FHN not recovering all or a portion of its recorded investment, the fair value election results in a more timely recognition of the effects of estimated prepayments through earnings rather than being recognized through other comprehensive income with periodic review for other-than-temporary impairment. Gains or losses are recognized through fixed income revenues and are presented in the recurring measurements table. Determination of Fair Value In accordance with ASC 820-10-35, fair values are based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following describes the assumptions and methodologies used to estimate the fair value of financial instruments recorded at fair value in the Consolidated Statements of Condition and for estimating the fair value of financial instruments for which fair value is disclosed under ASC 825-10-50. Short-term financial assets. Federal funds sold, securities purchased under agreements to resell, and interest bearing deposits with other financial institutions and the Federal Reserve are carried at historical cost. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the instrument and its expected realization. Trading securities and trading liabilities. Trading securities and trading liabilities are recognized at fair value through current earnings. Trading inventory held for broker-dealer operations is included in trading securities and trading liabilities. Broker-dealer long positions are valued at bid price in the bid-ask spread. Short positions are valued at the ask price. Inventory positions are valued using observable inputs including current market transactions, LIBOR and U.S. treasury curves, credit spreads, and consensus prepayment speeds. Trading loans are valued using observable inputs including current market transactions, swap rates, mortgage rates, and consensus prepayment speeds. Trading securities also include retained interests in prior mortgage securitizations that qualify as financial assets, which include primarily principal-only strips. FHN uses inputs including yield curves, credit spreads, and prepayment speeds to determine the fair value of principal-only strips. Securities available-for-sale. Securities available-for-sale includes the investment portfolio accounted for as available-for-sale under ASC 320-10-25. Valuations of available-for-sale securities are performed using observable inputs obtained from market transactions in similar securities. Typical inputs include LIBOR and U.S. treasury curves, consensus prepayment estimates, and credit spreads. When available, broker quotes are used to support these valuations. Interest only strips are valued at elected fair value based on an income approach using an internal valuation model. The internal valuation model includes assumptions regarding projections of future cash flows, prepayment rates, default rates and interest only strip terms. These securities bear the risk of loan prepayment or default that may result in the Company not recovering all or a portion of its recorded investment. When appropriate, valuations are adjusted for various factors including default or prepayment status of the underlying SBA loans. Because of the inherent uncertainty of valuation, those estimated values may be higher or lower than the values that would have been used had a ready market for the securities existed, and may change in the near term. Loans held-for-sale. Residential real estate loans held-for-sale are valued using current transaction prices and/or values on similar assets when available, including committed bids for specific loans or loan portfolios. Uncommitted bids may be adjusted based on other available market information. For all other loans FHN determines the fair value of residential real estate loans held-for-sale using a discounted cash flow model which incorporates both observable and unobservable inputs. Inputs include current mortgage rates for similar products, estimated prepayment rates, foreclosure losses, and various loan performance measures (delinquency, LTV, credit score). Adjustments for delinquency and other differences in loan characteristics are typically reflected in the model’s discount rates. Loss severity trends and the value of underlying collateral are also considered in assessing the appropriate fair value for severely delinquent loans and loans in foreclosure. The valuation of HELOCs also incorporates estimated cancellation rates for loans expected to become delinquent. Non-mortgage consumer loans held-for-sale are valued using committed bids for specific loans or loan portfolios or current market pricing for similar assets with adjustments for differences in credit standing (delinquency, historical default rates for similar loans), yield, collateral values and prepayment rates. If pricing for similar assets is not available, a discounted cash flow methodology is utilized, which incorporates all of these factors into an estimate of investor required yield for the discount rate. The Company utilizes quoted market prices of similar instruments or broker and dealer quotations to value the SBA and USDA guaranteed loans. The Company values SBA-unguaranteed interests in loans held-for-sale based on individual loan characteristics, such as industry type and pay history which generally follows an income approach. Furthermore, these valuations are adjusted for changes in prepayment estimates and are reduced due to restrictions on trading. The fair value of other non-residential real estate loans held-for-sale is approximated by their carrying values based on current transaction values. Collateral-Dependent loans. For loans measured using the estimated fair value of collateral less costs to sell, fair value is estimated using appraisals of the collateral. Collateral values are monitored and additional write-downs are recognized if it is determined that the estimated collateral values have declined further. Estimated costs to sell are based on current amounts of disposal costs for similar assets. Carrying value is considered to reflect fair value for these loans. Derivative assets and liabilities . The fair value for forwards

Restructuring, Repositioning, a

Restructuring, Repositioning, and Efficiency	12 Months Ended
	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring, Repositioning, and Efficiency	Restructuring, Repositioning, and Efficiency In first quarter 2019, FHN initiated a company-wide review of business practices with the goal of optimizing its expense base to improve profitability and create capacity to reinvest savings into technology and revenue production activities. Restructuring, repositioning, and efficiency charges related to these corporate-driven actions were $39.8 million in 2019 and are included in the corporate segment. Significant expenses recognized during 2019 resulted from the following actions: • Severance and other employee costs of $10.5 million primarily related to efficiency initiatives within corporate and bank services functions which are classified as Employee compensation, incentives and benefits within noninterest expense. • Expense of $16.0 million largely related to the identification of efficiency opportunities within the organization which is reflected in Professional fees. • Expense of $12.0 million related to costs associated with asset impairments which is reflected in Other expense. Settlement of the obligations arising from current initiatives will be funded from operating cash flows. Total expense recognized for the year ended December 31, 2019 is presented in the table below: Dollars in thousands Year Ended December 31, 2019 Employee compensation, incentives and benefits $ 10,503 Professional fees 16,014 Occupancy 818 Other 12,484 Total restructuring and repositioning charges $ 39,819

Parent Company Financial Inform

Parent Company Financial Information	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Parent Company Financial Information	Parent Company Financial Information Following are statements of the parent company: Statements of Condition December 31 (Dollars in thousands) 2019 2018 Assets: Cash $ 369,268 $ 334,485 Notes receivable 2,716 2,888 Allowance for loan losses — (925 ) Investments in subsidiaries: Bank 5,038,909 4,741,105 Non-bank 17,892 20,281 Other assets 171,121 180,757 Total assets $ 5,599,906 $ 5,278,591 Liabilities and equity: Accrued employee benefits and other liabilities $ 177,080 $ 158,648 Term borrowings 642,249 629,994 Total liabilities 819,329 788,642 Total equity 4,780,577 4,489,949 Total liabilities and equity $ 5,599,906 $ 5,278,591 Statements of Income Year Ended December 31 (Dollars in thousands) 2019 2018 2017 Dividend income: Bank $ 345,000 $ 420,000 $ 250,000 Non-bank 756 1,386 1,097 Total dividend income 345,756 421,386 251,097 Interest income 76 29 — Other income/(loss) 965 83 190 Total income 346,797 421,498 251,287 Provision/(provision credit) for loan losses (925 ) — — Interest expense: Term borrowings 31,224 31,315 17,936 Total interest expense 31,224 31,315 17,936 Compensation, employee benefits and other expense 52,447 53,401 43,783 Total expense 82,746 84,716 61,719 Income/(loss) before income taxes 264,051 336,782 189,568 Income tax(benefit)/expense (19,285 ) (38,509 ) 512 Income/(loss) before equity in undistributed net income of subsidiaries 283,336 375,291 189,056 Equity in undistributed net income/(loss) of subsidiaries: Bank 160,257 170,939 (24,255 ) Non-bank (2,685 ) (1,188 ) 714 Net income/(loss) attributable to the controlling interest $ 440,908 $ 545,042 $ 165,515 Certain previously reported amounts have been reclassified to agree with current presentation. Statements of Cash Flows Year Ended December 31 (Dollars in thousands) 2019 2018 2017 Operating activities: Net income/(loss) $ 440,908 $ 545,042 $ 165,515 Less undistributed net income/(loss) of subsidiaries 157,572 169,751 (23,541 ) Income/(loss) before undistributed net income of subsidiaries 283,336 375,291 189,056 Adjustments to reconcile income to net cash provided by operating activities: Depreciation, amortization, and other (915 ) 15 15 (Gain)/loss on securities (317 ) (28 ) (109 ) Provision for deferred income taxes 3,648 3,212 7,727 Stock-based compensation expense 21,909 22,398 19,625 Net (increase)/decrease in interest receivable and other assets 10,170 18,214 8,605 Net (decrease)/increase in interest payable and other liabilities 17,736 (10,702 ) 13,172 Total adjustments 52,231 33,109 49,035 Net cash provided/(used) by operating activities 335,567 408,400 238,091 Investing activities: Securities: Sales and prepayments 1,457 65 318 Premises and equipment: Sales/(purchases) 19 (43 ) 7 Return on investment in subsidiary 164 1,597 1,871 Cash paid for business combination, net — (39,916 ) (126,149 ) Net cash provided/(used) by investing activities 1,640 (38,297 ) (123,953 ) Financing activities: Preferred stock: Cash dividends (6,200 ) (6,200 ) (6,200 ) Common stock: Exercise of stock options 9,665 4,482 6,132 Cash dividends (171,076 ) (138,706 ) (79,904 ) Repurchase of shares (134,813 ) (104,768 ) (5,554 ) Term borrowings: Repayment of term borrowings — (45,364 ) — Net cash (used)/provided by financing activities (302,424 ) (290,556 ) (85,526 ) Net increase/(decrease) in cash and cash equivalents 34,783 79,547 28,612 Cash and cash equivalents at beginning of year 334,485 254,938 226,326 Cash and cash equivalents at end of year $ 369,268 $ 334,485 $ 254,938 Total interest paid $ 29,169 $ 29,186 $ 17,321 Income taxes received from subsidiaries 43,418 49,056 23,020

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	Basis of Accounting.
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation. The consolidated financial statements include the accounts of FHN and other entities in which it has a controlling financial interest. Variable Interest Entities (“VIEs”) for which FHN or a subsidiary has been determined to be the primary beneficiary are also consolidated. Affiliates for which FHN is not considered the primary beneficiary and in which FHN does not have a controlling financial interest are accounted for by the equity method. These investments are included in other assets, and FHN’s proportionate share of income or loss is included in noninterest income. All significant intercompany transactions and balances have been eliminated. For purposes of comparability, certain prior period amounts have been reclassified to conform to current year presentation.
Business Combinations	Business Combinations. FHN accounts for acquisitions meeting the definition of a business combination in accordance with ASC 805, "Business Combinations," which requires acquired assets and liabilities (other than tax, certain benefit plan balances, and starting in 2019 certain lease-related assets and liabilities) to be recorded at fair value. Business combinations are included in the financial statements from the respective dates of acquisition. Acquisition related costs are expensed as incurred.
Revenues	Revenues. Revenue is recognized when the performance obligations under the terms of a contract with a customer are satisfied in an amount that reflects the consideration FHN expects to be entitled. FHN derives a significant portion of its revenues from fee-based services. Noninterest income from transaction-based fees is generally recognized immediately upon completion of the transaction. Noninterest income from service-based fees is generally recognized over the period in which FHN provides the service. Any services performed over time generally require that FHN render services each period and therefore FHN measures progress in completing these services based upon the passage of time and recognizes revenue as invoiced. Following is a discussion of FHN's key revenues within the scope of Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers", and all related amendments, except as noted. Fixed Income. Fixed income includes fixed income securities sales, trading, and strategies, loan sales and derivative sales which are not within the scope of revenue from contracts with customers. Fixed income also includes investment banking fees earned for services related to underwriting debt securities and performing portfolio advisory services. FHN's performance obligation for underwriting services is satisfied on the trade date while advisory services is satisfied over time. Deposit Transactions and Cash Management. Deposit transactions and cash management activities include fees for services related to consumer and commercial deposit products (such as service charges on checking accounts), cash management products and services such as electronic transaction processing (Automated Clearing House and Electronic Data Interchange), account reconciliation services, cash vault services, lockbox processing, and information reporting to large corporate clients. FHN's obligation for transaction-based services is satisfied at the time of the transaction when the service is delivered while FHN's obligation for service based fees is satisfied over the course of each month. Brokerage, Management Fees and Commissions. Brokerage, management fees and commissions include fees for portfolio management, trade commissions, and annuity and mutual fund sales. Asset-based management fees are charged based on the market value of the client’s assets. The services associated with these revenues, which include investment advice and active management of client assets are generally performed and recognized over a month or quarter. Transactional revenues are based on the size and number of transactions executed at the client’s direction and are generally recognized on the trade date. Trust Services and Investment Management. Trust services and investment management fees include investment management, personal trust, employee benefits, and custodial trust services. Obligations for trust services are generally satisfied over time but may be satisfied at points in time for certain activities that are transactional in nature. Bankcard Income. Bankcard income includes credit interchange and network revenues and various card-related fees. Interchange income is recognized concurrently with the delivery of services on a daily basis. Card-related fees such as late fees, currency conversion, and cash advance fees are loan-related and excluded from the scope of ASU 2014-09. Contract Balances. As of December 31, 2019, accounts receivable related to products and services on non-interest income were $8.7 million . For the year ended December 31, 2019, FHN had no material impairment losses on non-interest accounts receivable and there were no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Statement of Condition as of December 31, 2019. Transaction Price Allocated to Remaining Performance Obligations. For the year ended December 31, 2019, revenue recognized from performance obligations related to prior periods was not material. Revenue expected to be recognized in any future year related to remaining performance obligations, excluding revenue pertaining to contracts that have an original expected duration of one year or less and contracts where revenue is recognized as invoiced, is not material.
Debt and Equity Investment Securities	Debt Investment Securities. Available-for-sale ("AFS") and held-to-maturity (“HTM”) securities are reviewed quarterly for possible other-than-temporary impairment (“OTTI”). The review includes an analysis of the facts and circumstances of each individual investment such as the degree of loss, the length of time the fair value has been below cost, the expectation for that security’s performance, the creditworthiness of the issuer and FHN’s intent and ability to hold the security. Debt securities that may be sold prior to maturity are classified as AFS and are carried at fair value. The unrealized gains and losses on debt securities AFS, including securities for which no credit impairment exists, are excluded from earnings and are reported, net of tax, as a component of other comprehensive income within shareholders’ equity and the Statements of Comprehensive Income. Debt securities which management has the intent and ability to hold to maturity are reported at amortized cost. Interest-only strips that are classified as securities AFS are valued at elected fair value. See Note 24 - Fair Value of Assets and Liabilities for additional information. Realized gains and losses for investment securities are determined by the specific identification method and reported in noninterest income. Declines in value judged to be other-than-temporary based on FHN’s analysis of the facts and circumstances related to an individual investment, including securities that FHN has the intent to sell, are also determined by the specific identification method. For HTM debt securities, OTTI recognized is typically credit-related and is reported in noninterest income. For impaired AFS debt securities that FHN does not intend to sell and will not be required to sell prior to recovery but for which credit losses exist, the OTTI recognized is separated between the total impairment related to credit losses which is reported in noninterest income, and the impairment related to all other factors which is excluded from earnings and reported, net of tax, as a component of other comprehensive income within shareholders’ equity and the Statements of Comprehensive Income. Equity Investment Securities. Equity securities are classified in Other assets. National banks chartered by the federal government are, and banks organized under state law may apply to be, members of the Federal Reserve System. Each member bank is required to own stock in its regional Federal Reserve Bank ("FRB"). Given this requirement, FRB stock may not be sold, traded, or pledged as collateral for loans. Membership in the Federal Home Loan Bank (“FHLB”) network requires ownership of capital stock. Member banks are entitled to borrow funds from the FHLB and are required to pledge mortgage loans as collateral. Investments in the FHLB are non-transferable and, generally, membership is maintained primarily to provide a source of liquidity as needed. FRB and FHLB stock are recorded at cost and are subject to impairment reviews. FHN's subsidiary, First Horizon Bank, was a member bank throughout 2019, initially as a national bank and later as a state member bank. Other equity investments primarily consist of mutual funds which are marked to fair value through earnings. Smaller balances of equity investments without a readily determinable fair value are recorded at cost minus impairment with adjustments through earnings for observable price changes in orderly transactions for the identical or a similar investment of the same issuer.
Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase	Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase. FHN purchases short-term securities under agreements to resell which are accounted for as collateralized financings except where FHN does not have an agreement to sell the same or substantially the same securities before maturity at a fixed or determinable price. All of FHN’s securities purchased under agreements to resell are recognized as collateralized financings. Securities delivered under these transactions are delivered to either the dealer custody account at the FRB or to the applicable counterparty. Securities sold under agreements to repurchase are offered to cash management customers as an automated, collateralized investment account. Securities sold under agreements to repurchase are also used by the consumer/commercial bank to obtain favorable borrowing rates on its purchased funds. All of FHN's securities sold under agreements to repurchase are secured borrowings. Collateral is valued daily and FHN may require counterparties to deposit additional securities or cash as collateral, or FHN may return cash or securities previously pledged by counterparties, or FHN may be required to post additional securities or cash as collateral, based on the contractual requirements for these transactions. FHN’s fixed income business utilizes securities borrowing arrangements as part of its trading operations. Securities borrowing transactions generally require FHN to deposit cash with the securities lender. The amount of cash advanced is recorded within Securities purchased under agreements to resell in the Consolidated Statements of Condition. These transactions are not considered purchases and the securities borrowed are not recognized by FHN. FHN does not conduct securities lending transactions.
Loans Held-for-Sale	Loans Held-for-Sale. Loans originated or purchased for which management lacks the intent to hold are included in loans held-for-sale in the Consolidated Statements of Condition. FHN has elected the fair value option on a prospective basis for certain mortgage loans held-for-sale and repurchased loans that are not governmentally insured. Such loans are carried at fair value, with changes in the fair value recognized in the other income section of the Consolidated Statements of Income. For mortgage loans originated for sale for which the fair value option was elected, loan origination fees were recorded by FHN when earned and related direct loan origination costs are recognized when incurred. See Note 24 - Fair Value of Assets and Liabilities for additional information. FHN accounts for all other loans held-for-sale at the lower of cost or market value (“LOCOM”).
Loans	Loans.
Nonaccrual and Past Due Loans	Nonaccrual and Past Due Loans. Generally, loans are placed on nonaccrual status if it becomes evident that full collection of principal and interest is at risk, impairment has been recognized as a partial charge-off of principal balance due to insufficient collateral value and past due status, or on a case-by-case basis if FHN continues to receive payments, but there are other borrower-specific issues. • The accrual status policy for commercial troubled debt restructurings (“TDRs”) follows the same internal policies and procedures as other commercial portfolio loans. • Residential real estate secured loans discharged in bankruptcy that have not been reaffirmed by the borrower (“discharged bankruptcies”) are placed on nonaccrual regardless of delinquency status and are reported as TDRs. • Current second lien residential real estate loans that are junior to first liens are placed on nonaccrual status if the first lien is 90 or more days past due, is a bankruptcy, or is a troubled debt restructuring. • Consumer real estate (HELOC and residential real estate installment loans), if not already on nonaccrual per above situations, are placed on nonaccrual if the loan is 30 or more days delinquent at the time of modification and is also determined to be a TDR. • Government guaranteed/insured residential mortgage loans remain on accrual (even if the loan falls into one of the above categories) because the collection of principal and interest is reasonably assured. For commercial and consumer loans within each portfolio segment and class that have been placed on nonaccrual status, accrued but uncollected interest is reversed and charged against interest income when the loan is placed on nonaccrual status. Management may elect to continue the accrual of interest when the estimated net realizable value of collateral is sufficient to recover the principal balance and accrued interest. Interest payments received on nonaccrual loans are normally applied to outstanding principal first. Once all principal has been received, additional interest payments are recognized on a cash basis as interest income. Generally, commercial and consumer loans within each portfolio segment and class that have been placed on nonaccrual status can be returned to accrual status if all principal and interest is current and FHN expects full repayment of the remaining contractual principal and interest. This typically requires that a borrower make payments in accordance with the contractual terms for a sustained period of time (generally for a minimum of six months) before being returned to accrual status. For TDRs, FHN may also consider a borrower’s sustained historical repayment performance for a reasonable time prior to the restructuring in assessing whether the borrower can meet the restructured terms, as it may indicate whether the borrower is capable of servicing the level of debt under the modified terms. Residential real estate loans discharged through Chapter 7 bankruptcy and not reaffirmed by the borrower are not returned to accrual status. For current second liens that have been placed on nonaccrual because the first lien is 90 or more days past due or is a TDR or bankruptcy, the second lien may be returned to accrual upon pay-off or cure of the first lien.
Charge-offs	Charge-offs. For all commercial and consumer loan portfolio segments, all losses of principal are charged to the allowance for loan losses ("ALLL") in the period in which the loan is deemed to be uncollectible. For consumer loans, the timing of a full or partial charge-off generally depends on the loan type and delinquency status. Generally, for the consumer real estate and permanent mortgage portfolio segments, a loan will be either partially or fully charged-off when it becomes 180 days past due. At this time, if the collateral value does not support foreclosure, balances are fully charged-off and other avenues of recovery are pursued. If the collateral value supports foreclosure, the loan is charged-down to net realizable value (collateral value less estimated costs to sell) and is placed on nonaccrual status. For residential real estate loans discharged in Chapter 7 bankruptcy and not reaffirmed by the borrower, the fair value of the collateral position is assessed at the time FHN is made aware of the discharge and the loan is charged down to the net realizable value (collateral value less estimated costs to sell). Within the credit card and other portfolio segment, credit cards and installment loans secured by automobiles are normally charged-off upon reaching 180 days past due while other non-real estate consumer loans are charged-off upon reaching 120 days past due.
Impaired Loans	Impaired Loans. Impaired loans include nonaccrual commercial loans greater than $1 million and modified consumer and commercial loans that have been classified as a TDR and are individually measured for impairment under the guidance of ASC 310. TDRs are always reported as such unless the TDR has exhibited sustained performance, was reported as a TDR over a year-end, and the modified terms were market-based at the time of modification.
Purchased Credit-Impaired Loans	Purchased Credit-Impaired Loans. ASC 310-30 “Accounting for Certain Loans or Debt Securities Acquired in a Transfer,” provides guidance for acquired loans that have exhibited deterioration of credit quality between origination and the time of acquisition and for which the timely collection of the interest and principal is not reasonably assured (“PCI loans”). PCI loans are initially recorded at fair value which is estimated by discounting expected cash flows at acquisition date. The expected cash flows include all contractually expected amounts (including interest) and incorporate an estimate for future expected credit losses, pre-payment assumptions, and yield requirement for a market participant, among other things. To the extent possible, certain PCI loans were aggregated into pools with composite interest rate and cash flows expected to be collected for the pool. Aggregation into loan pools is based upon common risk characteristics that include similar credit risk or risk ratings, and one or more predominant risk characteristics. Each PCI pool is accounted for as a single unit. Accretable yield is initially established at acquisition and is the excess of cash flows expected at acquisition over the initial investment in the loan and is recognized in interest income over the remaining life of the loan, or pool of loans. Nonaccretable difference is initially established at acquisition and is the difference between the contractually required payments at acquisition and the cash flows expected to be collected at acquisition. FHN estimates expected cash flows for PCI loans on a quarterly basis. Increases in expected cash flows from the last measurement result in reversal of any nonaccretable difference (or allowance for loan losses to the extent any has previously been recorded) with a prospective positive impact on interest income. Decreases to the expected cash flows result in an increase in the allowance for loan losses through provision expense. FHN does not report PCI loans as nonperforming loans due to the accretion of interest income. Additionally, PCI loans that have been pooled and subsequently modified will not be reported as troubled debt restructurings since the pool is the unit of measurement.
Allowance for Loan Losses	Allowance for Loan Losses. The ALLL is maintained at a level that management determines is sufficient to absorb estimated probable incurred losses in the loan portfolio. The ALLL is increased by the provision for loan losses and loan recoveries and is decreased by loan charge-offs. The ALLL is determined in accordance with ASC 450-20-50 "Contingencies - Accruals for Loss Contingencies" and is composed of reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer and commercial loans. The reserve factors applied to these pools are an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics. Additionally, the ALLL includes specific reserves established in accordance with ASC 310-10-35 for loans determined by management to be individually impaired as well as reserves associated with PCI loans. Management uses analytical models to estimate probable incurred losses in the loan portfolio as of the balance sheet date. The models, which are primarily driven by historical losses, are carefully reviewed to identify trends that may not be captured in the historical loss factors used in the models. Management uses qualitative adjustments for those items not yet captured in the models like current events, recent trends in the portfolio, current underwriting guidelines, and local and macroeconomic trends, among other things. The nature of the process by which FHN determines the appropriate ALLL requires the exercise of considerable judgment. See Note 5 - Allowance for Loan Losses for a discussion of FHN’s ALLL methodology and a description of the models utilized in the estimation process for the commercial and consumer loan portfolios. Key components of the estimation process are as follows: (1) commercial loans determined by management to be individually impaired loans are evaluated individually and specific reserves are determined based on the difference between the outstanding loan amount and the estimated net realizable value of the collateral (if collateral dependent), the present value of expected future cash flows or by observable market prices; (2) individual commercial loans not considered to be individually impaired are segmented based on similar credit risk characteristics and evaluated on a pool basis; (3) reserve rates for the commercial segment are calculated based on historical net charge-offs and are subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); (4) management’s estimate of probable incurred losses reflects the reserve rates applied against the balance of loans in the commercial segment of the loan portfolio; (5) consumer loans are generally segmented based on loan type; (6) reserve amounts for each consumer portfolio segment are calculated using analytical models based on delinquency trends and net loss experience and are subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); and (7) the reserve amount for each consumer portfolio segment reflects management’s estimate of probable incurred losses in the consumer segment of the loan portfolio. Impairment related to individually impaired loans is measured in accordance with ASC 310-10. For all commercial portfolio segments, commercial TDRs and other individually impaired commercial loans are measured based on the present value of expected future payments discounted at the loan’s effective interest rate (“the DCF method”), observable market prices, or for loans that are solely dependent on the collateral for repayment, the net realizable value (collateral value less estimated costs to sell). Impaired loans also include consumer TDRs. Future adjustments to the ALLL may be necessary if economic or other conditions differ substantially from the assumptions used in making the estimates or, if required by regulators, based upon information at the time of their examinations or upon future regulatory guidance. Such adjustments to original estimates, as necessary, are made in the period in which these factors and other relevant considerations indicate that loss levels vary from previous estimates.
Premises and Equipment	Premises and Equipment. Premises and equipment are carried at cost less accumulated depreciation and amortization and include additions that materially extend the useful lives of existing premises and equipment. All other maintenance and repair expenditures are expensed as incurred. Premises and equipment held-for-sale are generally valued at appraised values which reference recent disposition values for similar property types but also consider marketability discounts for vacant properties. The valuations of premises and equipment held-for-sale are reduced by estimated costs to sell. Impairments, and any subsequent recoveries, are recorded in noninterest expense. Gains and losses on dispositions are reflected in noninterest income and expense, respectively. Depreciation and amortization are computed on the straight-line method over the estimated useful lives of the assets and are recorded as noninterest expense. Leasehold improvements are amortized over the lesser of the lease periods or the estimated useful lives using the straight-line method. Useful lives utilized in determining depreciation for furniture, fixtures and equipment and for buildings are three years to fifteen years and seven years to forty-five years
Other Real Estate Owned (OREO)	Other Real Estate Owned ("OREO"). Real estate acquired by foreclosure or other real estate-owned consists of properties that have been acquired in satisfaction of debt. These properties are carried at the lower of the outstanding loan amount or estimated fair value less estimated costs to sell the real estate. At the time acquired, and in conjunction with the transfer from loans to OREO, there is a charge-off against the ALLL if the estimated fair value less costs to sell is less than the loan’s cost basis. Subsequent declines in fair value and gains or losses on dispositions, if any, are charged to All other expense on the Consolidated Statements of Income. Properties acquired by foreclosure in compliance with HUD servicing guidelines prior to January 1, 2015, are included in “OREO” and are carried at the estimated amount of the underlying government insurance or guarantee. On December 31, 2019, FHN had $2.2 million of these properties. Required developmental costs associated with acquired property under construction are capitalized and included in determining the estimated net realizable value of the property, which is reviewed periodically, and any write-downs are charged against current earnings.
Intangible Assets	Intangible Assets. Intangible assets consist of “Other intangible assets” and “Goodwill.” Other intangible assets represent customer lists and relationships, acquired contracts, covenants not to compete and premium on purchased deposits, which are amortized over their estimated useful lives. Intangible assets related to acquired deposit bases are primarily amortized over 10 years using an accelerated method. Management evaluates whether events or circumstances have occurred that indicate the remaining useful life or carrying value of amortizing intangibles should be revised. Goodwill represents the excess of cost over net assets of acquired businesses less identifiable intangible assets. On an annual basis, FHN assesses goodwill for impairment.
Derivative Financial Instruments	Derivative Financial Instruments. FHN accounts for derivative financial instruments in accordance with ASC 815 which requires recognition of all derivative instruments on the balance sheet as either an asset or liability measured at fair value through adjustments to either accumulated other comprehensive income within shareholders’ equity or current earnings. Fair value is defined as the price that would be received to sell a derivative asset or paid to transfer a derivative liability in an orderly transaction between market participants on the transaction date. Fair value is determined using available market information and appropriate valuation methodologies. FHN has elected to present its derivative assets and liabilities gross on the Consolidated Statements of Condition. Amounts of collateral posted or received have not been netted with the related derivatives unless the collateral amounts are considered legal settlements of the related derivative positions. See Note 22 - Derivatives for discussion on netting of derivatives. FHN prepares written hedge documentation, identifying the risk management objective and designating the derivative instrument as a fair value hedge or cash flow hedge as applicable, or as a free-standing derivative instrument entered into as an economic hedge or to meet customers’ needs. All transactions designated as ASC 815 hedges must be assessed at inception and on an ongoing basis as to the effectiveness of the derivative instrument in offsetting changes in fair value or cash flows of the hedged item. For a fair value hedge, changes in the fair value of the derivative instrument and changes in the fair value of the hedged asset or liability attributable to the hedged risk are recognized currently in earnings. For a cash flow hedge, changes in the fair value of the derivative instrument are recorded in accumulated other comprehensive income and subsequently reclassified to earnings as the hedged transaction impacts net income. Prior to 2018, ineffectiveness in debt and cash flow hedges was recorded in noninterest expense. Starting in 2018, for fair value hedges, the entire change in the fair value of the hedging instrument included in the assessment of effectiveness is recorded to the same financial statement line item (e.g., interest expense) used to present the earnings effect of the hedged item. For cash flow hedges, the entire fair value change of the hedging instrument that is included in the assessment of hedge effectiveness is initially recorded in other comprehensive income and later recycled into earnings as the hedged transaction(s) affect net income with the income statement effects recorded in the same financial statement line item used to present the earnings effect of the hedged item (e.g., interest income). For free-standing derivative instruments, changes in fair values are recognized currently in earnings. See Note 22 - Derivatives for additional information. Cash flows from derivative contracts are reported as operating activities on the Consolidated Statements of Cash Flows.
Leases, Lessee	Leases. At inception, all arrangements are evaluated to determine if they contain a lease, which is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant, or equipment for a period of time in exchange for consideration. Control is deemed to exist when a lessor has granted and a lessee has received both the right to obtain substantially all of the economic benefits from use of the identified asset and the right to direct the use of the identified asset throughout the period of use. Lessee. As a lessee, FHN recognizes lease (right-of-use) assets and lease liabilities for all leasing arrangements with lease terms that are greater than one year. The lease asset and lease liability are recognized at the present value of estimated future lease payments, including estimated renewal periods, with the discount rate reflecting a fully-collateralized rate matching the estimated lease term. Renewal options are included in the estimated lease term if they are considered reasonably certain of exercise. Periods covered by termination options are included in the lease term if it is reasonably certain they will not be exercised. Additionally, prepaid or accrued lease payments, lease incentives and initial direct costs related to lease arrangements are recognized within the right-of-use asset. Each lease is classified as a financing or operating lease which depends on the relationship of the lessee’s rights to the economic value of the leased asset. For finance leases, interest on the lease liability is recognized separately from amortization of the right-of-use asset in earnings, resulting in higher expense in the earlier portion of the lease term. For operating leases, a single lease cost is calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis. Substantially all of FHN’s lessee arrangements are classified as operating leases. For leases with a term of 12 months or less, FHN does not to recognize lease assets and lease liabilities and expense is generally recognized on a straight-line basis over the lease term. Lease assumptions and classification are reassessed upon the occurrence of events that result in changes to the estimated lease term or consideration. Modifications to lease contracts are evaluated to determine 1) if a right to use an additional asset has been obtained, 2) if only the lease term and/or consideration have been revised or 3) if a full or partial termination has occurred. If an additional right-of use-asset has been obtained, the modification is treated as a separate contract and its classification is evaluated as a new lease arrangement. If only the lease term or consideration are changed, the lease liability is revalued with an offset to the lease asset and the lease classification is re-assessed. If a modification results in a full or partial termination of the lease, the lease liability is revalued through earnings along with a proportionate reduction in the value of the related lease asset and subsequent expense recognition is similar to a new lease arrangement. Lease assets are evaluated for impairment when triggering events occur, such as a change in management intent regarding the continued occupation of the leased space. If a lease asset is impaired, it is written down to the present value of estimated future cash flows and the prospective expense recognition for that lease follows the accelerated expense recognition methodology applicable to finance leases, even if it remains classified as an operating lease. Sublease arrangements are accounted for consistent with the lessor accounting described below. Sublease arrangements are evaluated to determine if changes to estimates for the primary lease are warranted or if the sublease terms reflect impairment of the related lease asset. Lease assets are recognized in Other assets and lease liabilities are recognized in Other liabilities in the Consolidated Statements of Condition. Since substantially all of its leasing arrangements relate to real estate, FHN records lease expense, and any related sublease income, within Occupancy expense in the Consolidated Statements of Income.
Leases, Lessor	Lessor. As a lessor, FHN also evaluates its lease arrangements to determine whether a finance lease or an operating lease exists and utilizes the rate implicit in the lease arrangement as the discount rate to calculate the present value of future cash flows. Depending upon the terms of the individual agreements, finance leases represent either sales-type or direct financing leases, both of which require de-recognition of the asset being leased with offsetting recognition of a lease receivable that is evaluated for impairment similar to loans. Currently, all of FHN’s lessor arrangements are considered operating leases. Lease income for operating leases is recognized over the life of the lease, generally on a straight line basis. Lease incentives and initial direct costs are capitalized and amortized over the estimated life of the lease. Lease income is not significant for any reporting periods and is classified as a reduction of Occupancy expense in the Consolidated Statements of Income.
Advertising and Public Relations	Advertising and Public Relations. Advertising and public relations costs are generally expensed as incurred.
Income Taxes	Income Taxes. FHN accounts for income taxes using the asset and liability method pursuant to ASC 740, “Income Taxes,” which requires the recognition of deferred tax assets ("DTAs") and liabilities ("DTLs") for the expected future tax consequences of events that have been included in the financial statements. Under this method, FHN’s deferred tax assets and liabilities are determined based on differences between financial statement carrying amounts and the corresponding tax basis of certain assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on DTAs and DTLs is recognized in income in the period that includes the enactment date. Additionally, DTAs are subject to a “more likely than not” test to determine whether the full amount of the DTAs should be recognized in the financial statements. FHN evaluates the likelihood of realization of the DTA based on both positive and negative evidence available at the time, including (as appropriate) scheduled reversals of DTLs, projected future taxable income, tax planning strategies, and recent financial performance. If the “more likely than not” test is not met, a valuation allowance must be established against the DTA. In the event FHN determines that DTAs are realizable in the future in excess of their net recorded amount, FHN would make an adjustment to the valuation allowance, which would reduce the provision for income taxes. FHN records uncertain tax positions in accordance with ASC 740 on the basis of a two-step process in which (1) it is determined whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority is recognized. FHN's ASC 740 policy is to recognize interest and penalties related to unrecognized tax benefits as a component of income tax expense. Accrued interest and penalties are included within the related tax asset/liability line in the consolidated balance sheet. FHN and its eligible subsidiaries are included in a consolidated federal income tax return. FHN files separate returns for subsidiaries that are not eligible to be included in a consolidated federal income tax return. Based on the laws of the applicable state where it conducts business operations, FHN either files consolidated, combined, or separate returns. FHN’s federal consolidated tax returns are currently under audit for 2013 through 2015 and the statutes for those years have been extended through December 31, 2020. Federal tax refund claims for Capital Bank Financial Corporation for 2010 - 2012 are under examination by the IRS. Several of FHN’s state returns are currently under examination.
Earnings per Share	Earnings per Share. Earnings per share is computed by dividing net income or loss available to common shareholders by the weighted average number of common shares outstanding for each period. Diluted earnings per share in net income periods is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding adjusted to include the number of additional common shares that would have been outstanding if the potential dilutive common shares resulting from performance shares and units, restricted shares and units, and options granted under FHN’s equity compensation plans and deferred compensation arrangements had been issued. FHN utilizes the treasury stock method in this calculation. Diluted earnings per share does not reflect an adjustment for potentially dilutive shares in periods in which a net loss available to common shareholders exists.
Equity Compensation	Equity Compensation. FHN accounts for its employee stock-based compensation plans using the grant date fair value of an award to determine the expense to be recognized over the life of the award. Stock options are valued using an option-pricing model, such as Black-Scholes. Restricted and performance shares and share units are valued at the stock price on the grant date. Awards with post-vesting transfer restrictions are discounted using models that reflect market considerations for illiquidity. For awards with service vesting criteria, expense is recognized using the straight-line method over the requisite service period (generally the vesting period). Forfeitures are recognized when they occur. For awards vesting based on a performance measure, anticipated performance is projected to determine the number of awards expected to vest, and the corresponding aggregate expense is adjusted to reflect the elapsed portion of the performance period. If a performance period extends beyond the required service term, total expense is adjusted for changes in estimated achievement through the end of the performance period. Some performance awards include a total shareholder return modifier (“TSR Modifier”) that operates after determination of the performance criteria, affecting only the quantity of awards issued if the minimum performance threshold is attained. The effect of the TSR Modifier is included in the grant date fair value of the related performance awards using a Monte Carlo valuation technique. The fair value of equity awards with cash payout requirements, as well as awards for which fair value cannot be estimated at grant date, is remeasured each reporting period through vesting date. Performance awards with pre-grant date achievement criteria are expensed over the period from the start of the performance period through the end of the service vesting term. Awards are amortized using the nonsubstantive vesting methodology which requires that expense associated with awards having only service vesting criteria that continue vesting after retirement be recognized over a period ending no later than an employee’s retirement eligibility date.
Repurchase and Foreclosure Provision	Repurchase and Foreclosure Provision. The repurchase and foreclosure provision is the charge to earnings necessary to maintain the liability at a level that reflects management’s best estimate of losses associated with the repurchase of loans previously transferred in whole loans sales or securitizations, or make whole requests as of the balance sheet date. See Note 17 - Contingencies and Other Disclosures for discussion related to FHN’s obligations to repurchase such loans.
Legal Costs	Legal Costs. Generally, legal costs are expensed as incurred.Costs related to equity issuances are netted against Capital surplus. Costs related to debt issuances are included in debt issuance costs that are recorded within Term borrowings.
Contingency Accruals	Contingency Accruals. Contingent liabilities arise in the ordinary course of business, including those related to lawsuits, arbitration, mediation, and other forms of litigation. FHN establishes loss contingency liabilities for matters when loss is both probable and reasonably estimable in accordance with ASC 450-20-50 “Contingencies - Accruals for Loss Contingencies”. If loss for a matter is probable and a range of possible loss outcomes is the best estimate available, accounting guidance generally requires a liability to be established at the low end of the range. Expected recoveries from insurance and indemnification arrangements are recognized if they are considered equally as probable and reasonably estimable as the related loss contingency up to the recognized amount of the estimated loss. Gain contingencies and expected recoveries from insurance and indemnification arrangements in excess of the associated recorded estimated losses are generally recognized when received. Recognized recoveries are recorded as offsets to the related expense in the Consolidated Statements of Income. The favorable resolution of a gain contingency generally results in the recognition of other income in the Consolidated Statements of Income. Contingencies assumed in business combinations are evaluated through the end of the one-year post-closing measurement period. If the acquisition-date fair value of the contingency can be determined during the measurement period, recognition occurs as part of the acquisition-date fair value of the acquired business. If the acquisition-date fair value of the contingency cannot be determined, but loss is considered probable as of the acquisition date and can be reasonably estimated within the measurement period, then the estimated amount is recorded within acquisition accounting. If the requirements for inclusion of the contingency as part of the acquisition are not met, subsequent recognition of the contingency is included in earnings.
Summary of Accounting Changes and Accounting Changes Issued but Not Currently Effective	Summary of Accounting Changes. Effective January 1, 2019, FHN adopted the provisions of ASU 2016-02, “Leases,” which requires a lessee to recognize in its statement of condition a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. ASU 2016-02 leaves lessor accounting largely unchanged from prior standards. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. All other leases must be classified as financing or operating leases which depends on the relationship of the lessee’s rights to the economic value of the leased asset. For finance leases, interest on the lease liability is recognized separately from amortization of the right-of-use asset in earnings, resulting in higher expense in the earlier portion of the lease term. For operating leases, a single lease cost is calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis. Effective January 1, 2019, FHN adopted the provisions of ASU 2018-11, “Leases - Targeted Improvements,” which provides an election for a cumulative effect adjustment to retained earnings upon initial adoption of ASU 2016-02. Alternatively, under the initial guidance of ASU 2016-02, lessees and lessors are required to recognize and measure leases at the beginning of the earliest comparative period presented using a modified retrospective approach. Both adoption alternatives include a number of optional practical expedients that entities may elect to apply, which would result in continuing to account for leases that commence before the effective date in accordance with previous requirements (unless the lease is modified) except that lessees are required to recognize a right-of-use asset and a lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were tracked and disclosed under previous requirements. ASU 2016-02 also requires expanded qualitative and quantitative disclosures to assess the amount, timing, and uncertainty of cash flows arising from lease arrangements. Upon adoption, FHN utilized the cumulative effect transition alternative provided by ASU 2018-11. FHN utilized the lease classification practical expedients and the short-term lease exemption upon adoption. FHN also has elected to determine the discount rate on leases as of the effective date and elected to use hindsight in determining lease terms as well as impairments of lease assets resulting from lease abandonments upon adoption. The table below summarizes the impact of adopting ASU 2016-02 as of January 1, 2019, for line items in the Consolidated Statements of Condition. Lease assets of approximately $185 million are included in Other Assets. Lease liabilities of approximately $204 million are included in Other Liabilities. The after-tax decrease in Undivided Profits reflects the recognition of deferred gains associated with prior sale-leaseback transactions, revisions to the estimated useful lives of leasehold improvements and adjustments of lease expense to reflect revised lease duration estimates. (Dollars in thousands) January 1, 2019 Loans, net of unearned income $ 3,450 Premises and equipment, net 2,718 Other assets 183,884 Other liabilities (191,010 ) Undivided profits 1,011 Effective January 1, 2019, FHN adopted the provisions of ASU 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). Capitalized implemented costs are required to be expensed over the term of the hosting arrangement which includes the non-cancellable period of the arrangement plus periods covered by (1) an option to extend the arrangement if the customer is reasonably certain to exercise that option, (2) an option to terminate the arrangement if the customer is reasonably certain not to exercise the termination option, and (3) an option to extend (or not to terminate) the arrangement in which exercise of the option is in the control of the vendor. ASU 2018-15 also requires application of the impairment guidance applicable to long-lived assets to the capitalized implementation costs. Amortization expense related to capitalized implementation costs must be presented in the same line item in the statement of income as the fees associated with the hosting element (service) of the arrangement and payments for capitalized implementation costs will be classified in the statement of cash flows in the same manner as payments made for fees associated with the hosting element. Capitalized implementation costs will be presented in the statement of financial position in the same line item that a prepayment for the fees of the associated hosting arrangement would be presented. FHN elected early adoption of ASU 2018-15 using the prospective transition method and the effects of adoption were not significant. In April 2019, the FASB issued ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments,” which makes several revisions and clarifications to the accounting for these items. The revisions related to ASU 2016-03 (Topic 326) are discussed below. ASU 2019-04 clarifies several aspects of fair hedge accounting, including the application to partial term fair value hedges. ASU 2019-04 provides an election regarding the timing for amortization of basis adjustments to hedged items in fair value hedges, indicating that amortization may, but is not required to, commence prior to the end of the hedge relationship. ASU 2019-04 also provides additional guidance related to the application of the hypothetical derivative method and first-payments-received method in cash flow hedges. Further, ASU 2019-04 indicates that remeasurement of an equity security without a readily determinable fair value when an orderly transaction is identified for an identical or similar investment of the same issuer represents a non-recurring fair value measurement and the related disclosure requirements apply to the remeasurement event. The hedging updates are effective at the beginning of the first annual reporting period after issuance with early adoption permitted. The financial instruments measurement and disclosure changes are effective for fiscal years and interim periods beginning after December 15, 2019 with early adoption permitted. FHN early adopted these portions of ASU 2019-04 in second quarter 2019 and the effects were not significant based on its existing accounting practices. Accounting Changes Issued but Not Currently Effective In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments,” which revises the measurement and recognition of credit losses for assets measured at amortized cost (e.g., held-to-maturity (“HTM”) loans and debt securities) and available-for-sale (“AFS”) debt securities. Under ASU 2016-13, for assets measured at amortized cost, the current expected credit loss (“CECL”) is measured as the difference between amortized cost and the net amount expected to be collected. This represents a departure from existing GAAP as the “incurred loss” methodology for recognizing credit losses delays recognition until it is probable a loss has been incurred. Under CECL the full amount of expected credit losses will be recognized at the time of loan origination. The measurement of current expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Additionally, current disclosures of credit quality indicators in relation to the amortized cost of financing receivables will be further disaggregated by year of origination. ASU 2016-13 leaves the methodology for measuring credit losses on AFS debt securities largely unchanged, with the maximum credit loss representing the difference between amortized cost and fair value. However, such credit losses will be recognized through an allowance for credit losses, which permits recovery of previously recognized credit losses if circumstances change. ASU 2016-13 also revises the recognition of credit losses for purchased financial assets with a more-than insignificant amount of credit deterioration since origination (“PCD assets”). For PCD assets, the initial allowance for credit losses is added to the purchase price. Only subsequent changes in the allowance for credit losses are recorded as a credit loss expense for PCD assets. Interest income for PCD assets will be recognized based on the effective interest rate, excluding the discount embedded in the purchase price that is attributable to the acquirer’s assessment of credit losses at acquisition. Currently, credit losses for purchased credit-impaired assets are included in the initial basis of the assets with subsequent declines in credit resulting in expense while subsequent improvements in credit are reflected as an increase in the future yield from the assets. For non-PCD assets, expected credit losses will be recognized through earnings upon acquisition and the entire premium or discount will be accreted to interest income over the remaining life of the loan. The provisions of ASU 2016-13 will be generally adopted through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in the year of adoption. Prospective implementation is required for debt securities for which an other-than-temporary-impairment (“OTTI”) had been previously recognized. Amounts previously recognized in accumulated other comprehensive income (“AOCI”) as of the date of adoption that relate to improvements in cash flows expected to be collected will continue to be accreted into income over the remaining life of the asset. Recoveries of amounts previously written off relating to improvements in cash flows after the date of adoption will be recorded in earnings when received. A prospective transition approach will be used for existing PCD assets where, upon adoption, the amortized cost basis will be increased to offset the initial recognition of the allowance for credit losses. Thus, an entity will not be required to reassess its purchased financial assets that exist as of the date of adoption to determine whether they would have met at acquisition the new criteria of more-than-insignificant credit deterioration since origination. An entity will accrete the remaining noncredit discount (based on the revised amortized cost basis) into interest income at the effective interest rate at the adoption date. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. FHN’s most significant implementation activities included review of loan portfolio segments and classes, identification and evaluation of collateral dependent loans and loans secured by collateral replenishment arrangements, selection of measurement methodologies and related model development, data accumulation and verification, development of loan life estimates, identification of reasonable and supportable forecast periods, selection of timelines and methods for reversion to unadjusted historical information, multiple preliminary analyses including parallel runs against existing loan loss estimation processes, and design and evaluation of internal controls over the new estimation processes. FHN will utilize undiscounted cash flow methods for loans except for troubled debt restructurings, which require use of discounted cash flow methodologies. Based on implementation efforts, FHN expects to incur a decrease to Undivided profits of approximately $100 million as of January 1, 2020, related to an increase in the allowance for loan losses as well as an increase in the reserve for unfunded commitments. A significant portion of this impact relates to increased reserves within the consumer portfolios, given the longer contractual maturities associated with many of these products as well as reserves related to acquired loans. FHN expects the coverage ratio for total loans to be approximately 100 basis points at adoption but would expect future coverage to be affected by changes in economic forecasts, portfolio composition and loan terms. The total impact from adoption to FHN's regulatory capital ratio CET1 is anticipated to be a decrease of approximately 7 basis points in 2020. Management is in the final stages of documenting the accounting, reporting and governance processes associated with the adoption of ASU 2016-13. FHN also assessed several asset classes other than loans that are within the scope of CECL and determined that the adoption effects for the change in measurement of credit risk were minimal for these classes. This includes Fed funds sold which have no history of credit losses due to their short (typically overnight) duration and counterparty risk assessment processes. This also includes securities borrowed and securities purchased under agreements to resell which have collateral maintenance agreements that incorporate master netting provisions resulting in minimal uncollateralized positions as of any date as evidenced by the disclosures provided in Note 23 - Master Netting and Similar Agreements-Repurchase, Reverse Repurchase, and Securities Borrowing Transactions. Additionally, FHN has also evaluated the composition of its AFS securities and determined that the changes in ASU 2016-13 will not have a significant effect on the current portfolio. ASU 2019-04 provides an election to either not measure or measure separately an allowance for credit losses for accrued interest receivable (“AIR"). Entities electing to not measure an allowance for AIR must write off uncollectible interest in a timely manner. Additionally, an election is provided for the write off of uncollectible interest to be recorded either as a reversal of interest income or a charge against the allowance for credit losses or a combination of both. Disclosures are required depending upon which elections are made. ASU 2019-04 also clarifies that when loans and securities are transferred between balance sheet categories (e.g., loans from held-for-investment to held-for-sale or securities from held-to-maturity to available-for-sale) the associated allowance for credit losses should be reversed to income and prospective accounting follows the requirements for the new classification. Further, ASU 2019-04 clarifies that recoveries should be incorporated within the estimation of the allowance for credit losses. Expected recoveries should not exceed the aggregate amount of prior write offs and expected future write offs. The inclusion of expected recoveries in the measurement of expected credit losses may result in a negative credit allowance in certain circumstances. Additionally, for collateral dependent financial assets, the allowance for credit losses that is added to the amortized cost basis should not exceed amounts previously written off. ASU 2019-04 also makes several changes when a discounted cash flow approach is used to measure expected credit losses. ASU 2019-04 removes ASU 2016-03’s prohibition of using projections of future interest rate environments when using a discounted cash flow method to measure expected credit losses on variable-rate financial instruments. If an entity uses projections or expectations of future interest rate environments in estimating expected cash flows, the same assumptions should be used in determining the effective interest rate used to discount those expected cash flows. The effective interest rate should also be adjusted to consider the effects of expected prepayments on the timing of expected future cash flows. ASU 2019-04 provides an election to adjust the effective interest rate used in discounting expected cash flows to isolate credit risk in measuring the allowance for credit losses. Further, the discount rate should not be adjusted for subsequent changes in expected prepayments if a financial asset is restructured in a troubled debt restructuring. Related to collateral-dependent financial assets, ASU 2019-04 requires inclusion of estimated costs to sell in the measurement of expected credit losses in situations where the entity intends to sell rather than operate the collateral. Additionally, the estimated costs to sell should be undiscounted when the entity intends to sell rather than operate the collateral. Finally, ASU 2019-04 specifies that contractual renewal or extension options, except those treated as derivatives, should be included in the determination of the contractual term for a financial asset when included in the original or modified contract as of the reporting date if they are not unconditionally cancellable by the entity. The effective date and transition requirements for these components of ASU 2019-04 are consistent with the requirements for ASU 2016-13 and FHN incorporated these changes and revisions within its implementation efforts. Based on its previous existing practices for the timely write off uncollectible AIR, FHN elected to not measure an allowance for credit losses for AIR and to continue recognition of related write offs as a reversal of interest income. In May 2019, the FASB issued ASU 2019-05, “Financial Instruments - Credit Losses, Targeted Transition Relief,” which provides an option to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost basis that are in the scope of ASU 2016-13, applied on an instrument-by-instrument basis. The fair value option election does not apply to held-to-maturity debt securities. The effective date and transition requirements for ASU 2019-05 are consistent with the requirements for ASU 2016-13. FHN did not elect to apply the fair value option to any asset classes that are in scope for CECL. In November 2019, the FASB issued ASU 2019-11, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses” which clarifies that expected recoveries should be included in the amortized cost basis previously written off or expected to be written off in the valuation allowance for PCD assets. ASU 2019-11 also clarifies that recoveries or expected recoveries of the unamortized noncredit discount or premium should not be included in the allowance for credit losses. ASU 2019-11 provides specific transition relief for existing troubled debt restructurings and extends the disclosure relief of ASU 2019-04 for accrued interest receivable balances to additional relevant disclosures involving amortized cost basis. Related to the assessment of credit risk for collateralized assets, ASU 2019-11 indicates that an entity should assess whether it reasonably expects the borrower will be able to continually replenish collateral securing the financial asset to apply the practical expedient of ASU 2016-13 while also requiring an estimation of expected credit losses for any difference between the amount of the amortized cost basis that is greater than the fair value of the collateral securing the financial asset. The effective date and transition requirements for ASU 2019-11 are consistent with the requirements for ASU 2016-13 and FHN incorporated these changes and revisions within its implementation efforts and the effects are embedded within the adoption effects of ASU 2016-13. Consistent with non-PCD assets, the effect of including recoveries and expected recoveries within the measurement of expected credit losses for PCD assets may result in a negative credit allowance in certain circumstances.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Impact of Adoption of ASU 2016-02	The table below summarizes the impact of adopting ASU 2016-02 as of January 1, 2019, for line items in the Consolidated Statements of Condition. Lease assets of approximately $185 million are included in Other Assets. Lease liabilities of approximately $204 million are included in Other Liabilities. The after-tax decrease in Undivided Profits reflects the recognition of deferred gains associated with prior sale-leaseback transactions, revisions to the estimated useful lives of leasehold improvements and adjustments of lease expense to reflect revised lease duration estimates. (Dollars in thousands) January 1, 2019 Loans, net of unearned income $ 3,450 Premises and equipment, net 2,718 Other assets 183,884 Other liabilities (191,010 ) Undivided profits 1,011

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Schedule of merger and integration expense	Total CBF merger and integration expense recognized for the years ended December 31, 2019 , 2018 , and 2017 are presented in the table below: Years Ended (Dollars in thousands) 2019 2018 2017 Professional fees (a) $ 11,221 $ 22,337 $ 28,151 Employee compensation, incentives and benefits (b) 1,189 9,613 17,077 Contract employment and outsourcing (c) 240 3,681 1,270 Occupancy (d) 1,453 5,236 15 Miscellaneous expense (e) 2,072 7,652 1,291 All other expense (f) 6,695 43,874 8,944 Total $ 22,870 $ 92,393 $ 56,748 (a) Primarily comprised of fees for legal, accounting, investment bankers, and merger consultants. (b) Primarily comprised of fees for severance and retention. (c) Primarily relates to fees for temporary assistance for merger and integration activities. (d) Primarily relates to fees associated with lease exit accruals. (e) Consists of fees for operations services, communications and courier, equipment rentals, depreciation, and maintenance, supplies, travel and entertainment, computer software, and advertising and public relations. (f) Primarily relates to contract termination charges, costs of shareholder matters and asset impairments related to the integration, as well as other miscellaneous expenses. Total merger expenses for the IBKC merger recognized during 2019 were as follows: Year Ended (Dollars in thousands) 2019 Professional fees (a) $ 8,228 Employee compensation, incentives and benefits (b) 3,079 Miscellaneous expense (c) 64 Total IBKC merger expense $ 11,371 (a) Primarily comprised of fees for legal, accounting, investment bankers, and merger consultants. (b) Primarily comprised of fees for severance and retention. (c) Primarily comprised of fees for travel and entertainment.
Schedule of recognized assets acquired and liabilities assumed	The following schedule details acquired assets and liabilities and consideration paid, as well as adjustments to record the assets and liabilities at their estimated fair values as of April 3, 2017: Coastal Securities, Inc Purchase Accounting/ As Fair Value Acquired Adjustments As recorded (Dollars in thousands) (unaudited) (unaudited) by FHN Assets: Cash and cash equivalents $ 7,502 $ — $ 7,502 Interest-bearing cash 4,132 — 4,132 Trading securities 423,662 (284,580 ) 139,082 Loans held-for-sale — 236,088 236,088 Investment securities — 1,413 1,413 Other intangible assets, net — 27,300 27,300 Premises and equipment, net 1,229 — 1,229 Other assets 1,658 14 1,672 Total assets acquired $ 438,183 $ (19,765 ) $ 418,418 Liabilities: Securities sold under agreements to repurchase $ 201,595 $ — $ 201,595 Other short-term borrowings 33,509 — 33,509 Fixed income payables 143,647 (47,158 ) 96,489 Other liabilities 958 (642 ) 316 Total liabilities assumed 379,709 (47,800 ) 331,909 Net assets acquired $ 58,474 $ 28,035 86,509 Consideration paid: Cash (131,473 ) Goodwill $ 44,964 The following schedule details acquired assets and liabilities and consideration paid, as well as adjustments to record the assets and liabilities at their estimated fair values as of November 30, 2017. These fair value measurements are based on third party and internal valuations. Capital Bank Financial Corporation As Purchase Accounting/Fair Acquired Value Adjustments (unaudited) As recorded (Dollars in thousands) (unaudited) 2017 2018 (a) by FHN Assets: Cash and cash equivalents $ 205,999 $ — $ — $ 205,999 Trading securities 4,758 (4,758 ) (b) — — Loans held-for-sale — 134,003 (11,034 ) 122,969 Securities available-for-sale 1,017,867 175,526 — 1,193,393 Securities held-to-maturity 177,549 (177,549 ) — — Loans 7,596,049 (320,372 ) 867 7,276,544 Allowance for loan losses (45,711 ) 45,711 — — CBF Goodwill 231,292 (231,292 ) — — Other intangible assets 24,498 119,302 (2,593 ) 141,207 Premises and equipment 196,298 37,054 (9,470 ) 223,882 OREO 43,077 (9,149 ) (315 ) 33,613 Other assets 617,232 41,320 (c) (22,422 ) (c) 636,130 Total assets acquired $ 10,068,908 $ (190,204 ) $ (44,967 ) $ 9,833,737 Liabilities: Deposits $ 8,141,593 $ (849 ) $ (642 ) $ 8,140,102 Securities sold under agreements to repurchase 26,664 — — 26,664 Other short-term borrowings 390,391 — — 390,391 Term borrowings 119,486 67,683 — 187,169 Other liabilities 59,995 4,291 1,631 65,917 Total liabilities assumed 8,738,129 71,125 989 8,810,243 Net assets acquired $ 1,330,779 $ (261,329 ) $ (45,956 ) 1,023,494 Consideration paid: Equity (1,746,718 ) Cash (469,615 ) Total consideration paid (2,216,333 ) Goodwill $ 1,192,839 (a) Amounts reflect adjustments made to provisional fair value estimates during the measurement period ending November 30, 2018. These adjustments were recorded in FHN's Consolidated Statement of Condition in 2018 with a corresponding adjustment to goodwill. (b) Amount represents a conformity adjustment to align with FHN presentation. (c) Amount primarily relates to a net deferred tax asset recorded for the effects of the purchase accounting adjustments and adjustments for acquired tax contingencies.
Schedule of business acquisition pro forma information	The following table presents financial information regarding the former CBF operations included in FHN's Consolidated Statements of Income from the date of acquisition (November 30, 2017) through December 31, 2017. Additionally, the table presents unaudited proforma information as if the acquisition of CBF had occurred on January 1, 2016: Actual from acquisition date through Unaudited Pro Forma for Year Ended December 31 (Dollars in thousands) December 31, 2017 2017 2016 Net interest income $ 31,253 $ 1,165,006 $ 1,033,218 Noninterest income 6,192 563,581 638,493 Pre-tax income 16,534 476,911 458,667 Net income available to common shareholders (a) NM 274,416 293,981 (a) Net income available to common shareholders is not meaningful for actual CBF results from the acquisition date through December 31, 2017 because of the effect of tax reform.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2019
Marketable Securities [Abstract]
Schedule of FHN's Investment Securities	The following tables summarize FHN’s investment securities on December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale: U.S. treasuries $ 100 $ — $ — $ 100 Government agency issued mortgage-backed securities (“MBS”) 2,316,381 34,692 (2,556 ) 2,348,517 Government agency issued collateralized mortgage obligations (“CMO”) 1,667,773 9,916 (7,197 ) 1,670,492 Other U.S. government agencies 303,463 3,750 (1,121 ) 306,092 Corporates and other debt 40,054 486 — 40,540 State and municipalities 57,232 3,324 (30 ) 60,526 $ 4,385,003 $ 52,168 $ (10,904 ) 4,426,267 AFS securities recorded at fair value through earnings: SBA-interest only strips (a) 19,136 Total securities available-for-sale (b) $ 4,445,403 Securities held-to-maturity: Corporates and other debt $ 10,000 $ 1 $ — $ 10,001 Total securities held-to-maturity $ 10,000 $ 1 $ — $ 10,001 (a) SBA-interest only strips are recorded at elected fair value. See Note 24 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.8 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. December 31, 2018 (Dollars in thousands) Amortized Gross Gross Fair Securities available-for-sale: U.S. treasuries $ 100 $ — $ (2 ) $ 98 Government agency issued MBS 2,473,687 4,819 (58,400 ) 2,420,106 Government agency issued CMO 2,006,488 888 (48,681 ) 1,958,695 Other U.S. government agencies 149,050 809 (73 ) 149,786 Corporates and other debt 55,383 388 (461 ) 55,310 State and municipalities 32,473 314 (214 ) 32,573 $ 4,717,181 $ 7,218 $ (107,831 ) 4,616,568 AFS securities recorded at fair value through earnings: SBA-interest only strips (a) 9,902 Total securities available-for-sale (b) $ 4,626,470 Securities held-to-maturity: Corporates and other debt $ 10,000 $ — $ (157 ) $ 9,843 Total securities held-to-maturity $ 10,000 $ — $ (157 ) $ 9,843 (a) SBA-interest only strips are recorded at elected fair value. See Note 24 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.8 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
Schedule of Amortized Cost And Fair Value By Contractual Maturity	The amortized cost and fair value by contractual maturity for the available-for-sale and held-to-maturity debt securities portfolios on December 31, 2019 are provided below: Held-to-Maturity Available-for-Sale (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Within 1 year $ — $ — $ 35,022 $ 35,211 After 1 year; within 5 years — — 209,003 213,108 After 5 years; within 10 years 10,000 10,001 755 3,332 After 10 years — — 156,069 174,743 Subtotal 10,000 10,001 400,849 426,394 Government agency issued MBS and CMO (a) — — 3,984,154 4,019,009 Total $ 10,000 $ 10,001 $ 4,385,003 $ 4,445,403 (a) Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
Schedule of Gross Gains And Losses On Sale From Available For Sale Portfolio	The table below provides information on gross gains and gross losses from debt investment securities for the years ended December 31: Equity securities are included in 2017. Available-for-Sale (Dollars in thousands) 2019 2018 2017 Gross gains on sales of securities $ — $ 52 $ 2,514 Gross (losses) on sales of securities (267 ) — (1,922 ) Net gain/(loss) on sales of securities (a) (b) (267 ) 52 592 (a) Cash proceeds from the sale of available-for-sale securities during 2019 were $191.7 million and were no t material in 2018. Cash proceeds from sales during 2017 were $937.0 million . (b) 2017 includes a $.4 million gain associated with the call of a $4.4 million held-to-maturity municipal bond.
Schedule of Investments Within The Available For Sale Portfolio That Had Unrealized Losses	The following tables provide information on investments within the available-for-sale portfolio that had unrealized losses as of December 31, 2019 and 2018: As of December 31, 2019 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. treasuries $ — $ — $ 100 $ — $ 100 $ — Government agency issued MBS 174,983 (495 ) 192,755 (2,061 ) 367,738 (2,556 ) Government agency issued CMO 378,815 (1,970 ) 361,124 (5,227 ) 739,939 (7,197 ) Other U.S. government agencies 98,471 (1,121 ) — — 98,471 (1,121 ) States and municipalities 3,551 (30 ) — — 3,551 (30 ) Total temporarily impaired securities $ 655,820 $ (3,616 ) $ 553,979 $ (7,288 ) $ 1,209,799 $ (10,904 ) As of December 31, 2018 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. treasuries $ — $ — $ 98 $ (2 ) $ 98 $ (2 ) Government agency issued MBS 597,008 (12,335 ) 1,537,106 (46,065 ) 2,134,114 (58,400 ) Government agency issued CMO 290,863 (2,860 ) 1,560,420 (45,821 ) 1,851,283 (48,681 ) Other U.S. government agencies 29,776 (73 ) — — 29,776 (73 ) Corporates and other debt 25,114 (344 ) 15,008 (117 ) 40,122 (461 ) States and municipalities 17,292 (214 ) — — 17,292 (214 ) Total temporarily impaired securities $ 960,053 — $ (15,826 ) — $ 3,112,632 — $ (92,005 ) $ 4,072,685 $ (107,831 )

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Schedule of Loans by Portfolio Segment	The following table provides the balance of loans, net of unearned income, by portfolio segment as of December 31, 2019 and 2018 : December 31 (Dollars in thousands) 2019 2018 Commercial: (a) Commercial, financial, and industrial $ 20,051,091 $ 16,514,328 Commercial real estate 4,337,017 4,030,870 Consumer: Consumer real estate (b) 6,006,749 6,249,516 Permanent mortgage 170,390 222,448 Credit card & other 495,864 518,370 Loans, net of unearned income $ 31,061,111 $ 27,535,532 Allowance for loan losses 200,307 180,424 Total net loans $ 30,860,804 $ 27,355,108 (a) In third quarter 2019, FHN corrected a previous mis-classification of commercial loans and reclassified approximately $410 million of market investor CRE loans from the C&I portfolio to the CRE portfolio. These loans were identified during an internal review and assessment by management of certain loan populations, a portion of which relate to loans acquired as part of the Capital Bank merger. The reclassification of these loan balances between regional banking portfolios did not have an impact on FHN’s consolidated period-end or average balance sheet and had an immaterial effect on the allowance for loan losses. No adjustments were made to prior periods as the impact of the reclassification, including the effect on the allowance for loan losses was deemed to be immaterial in all periods. (b) Balance as of December 31, 2018 includes $16.2 million of restricted real estate loans. See Note 21—Variable Interest Entities for additional information.
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Accretable Yield Movement Schedule Rollforward	The following table presents a rollforward of the accretable yield for the year ended December 31, 2019 and 2018 : Year Ended December 31 (Dollars in thousands) 2019 2018 Balance, beginning of period $ 13,375 $ 15,623 Accretion (5,792 ) (9,467 ) Adjustment for payoffs (2,438 ) (3,896 ) Adjustment for charge-offs (479 ) (1,115 ) Adjustment for pool excess recovery (a) — (123 ) Increase in accretable yield (b) 5,513 12,791 Disposals (4 ) (240 ) Other (367 ) (198 ) Balance, end of period $ 9,808 $ 13,375 (a) Represents the removal of accretable difference for the remaining loans in a pool which is now in a recovery state. (b) Includes changes in the accretable yield due to both transfers from the nonaccretable difference and the impact of changes in the expected timing of the cash flows.
Schedule of Acquired Purchase Credit Impaired Loans by Portfolio Segment	The following table reflects the outstanding principal balance and carrying amounts of the acquired PCI loans as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 (Dollars in thousands) Carrying value Unpaid balance Carrying value Unpaid balance Commercial, financial and industrial $ 24,973 $ 25,938 $ 38,873 $ 44,259 Commercial real estate 5,078 5,466 15,197 17,232 Consumer real estate 23,681 26,245 30,723 34,820 Credit card and other 489 567 1,627 1,879 Total $ 54,221 $ 58,216 $ 86,420 $ 98,190
Information by Class Related to Individually Impaired Loans	The following tables provide information at December 31, 2019 and 2018 , by class related to individually impaired loans and consumer TDRs, regardless of accrual status. Recorded investment is defined as the amount of the investment in a loan, excluding any valuation allowance but including any direct write-down of the investment. For purposes of this disclosure, PCI loans and the TRUPS valuation allowance have been excluded. December 31, 2019 (Dollars in thousands) Recorded Unpaid Related Average Recorded Interest Impaired loans with no related allowance recorded: Commercial: General C&I $ 52,672 $ 63,602 $ — $ 61,382 $ 690 Loans to mortgage companies — — — 9,314 — Income CRE 1,563 1,563 — 1,620 33 Total $ 54,235 $ 65,165 $ — $ 72,316 $ 723 Consumer: HELOC (a) $ 4,940 $ 10,438 $ — $ 6,582 $ — R/E installment loans (a) 5,329 6,105 — 5,335 — Permanent mortgage (a) 2,264 3,949 — 3,017 — Total $ 12,533 $ 20,492 $ — $ 14,934 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 29,766 $ 31,536 $ 6,196 $ 14,328 $ 4 TRUPS — — — 2,445 — Income CRE — — — 221 9 Total $ 29,766 $ 31,536 $ 6,196 $ 16,994 $ 13 Consumer: HELOC $ 55,522 $ 59,122 $ 7,016 $ 61,294 $ 1,868 R/E installment loans 34,862 35,780 4,521 40,181 1,016 Permanent mortgage 59,329 68,341 7,761 63,630 2,149 Credit card & other 653 653 422 694 18 Total $ 150,366 $ 163,896 $ 19,720 $ 165,799 $ 5,051 Total commercial $ 84,001 $ 96,701 $ 6,196 $ 89,310 $ 736 Total consumer $ 162,899 $ 184,388 $ 19,720 $ 180,733 $ 5,051 Total impaired loans $ 246,900 $ 281,089 $ 25,916 $ 270,043 $ 5,787 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance. December 31, 2018 (Dollars in thousands) Recorded Unpaid Related Average Interest Impaired loans with no related allowance recorded: Commercial: General C&I $ 42,902 $ 45,387 $ — $ 24,186 $ 757 Income CRE 1,589 1,589 — 1,434 51 Residential CRE — — — 374 — Total $ 44,491 $ 46,976 $ — $ 25,994 $ 808 Consumer: HELOC (a) $ 8,645 $ 16,648 $ — $ 8,723 $ — R/E installment loans (a) 4,314 4,796 — 4,300 — Permanent mortgage (a) 3,601 6,003 — 4,392 — Total $ 16,560 $ 27,447 $ — $ 17,415 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 2,802 $ 2,802 $ 149 $ 16,011 $ — TRUPS 2,888 3,700 925 2,981 — Income CRE 377 377 — 348 10 Residential CRE — — — 99 — Total $ 6,067 $ 6,879 $ 1,074 $ 19,439 $ 10 Consumer: HELOC $ 66,482 $ 69,610 $ 11,241 $ 69,535 $ 2,273 R/E installment loans 38,993 39,851 6,743 40,118 1,024 Permanent mortgage 67,245 78,010 9,419 73,259 2,290 Credit card & other 695 695 337 626 14 Total $ 173,415 $ 188,166 $ 27,740 $ 183,538 $ 5,601 Total commercial $ 50,558 $ 53,855 $ 1,074 $ 45,433 $ 818 Total consumer $ 189,975 $ 215,613 $ 27,740 $ 200,953 $ 5,601 Total impaired loans $ 240,533 $ 269,468 $ 28,814 $ 246,386 $ 6,419 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance.
Balances of Commercial Loan Portfolio Classes, Disaggregated by PD Grade	The following tables provide the balances of commercial loan portfolio classes with associated allowance, disaggregated by PD grade as of December 31, 2019 and 2018 : December 31, 2019 (Dollars in thousands) General C&I Loans to Mortgage Companies TRUPS (a) Income CRE Residential CRE Total Percentage of Total Allowance for Loan Losses PD Grade: 1 $ 696,040 $ — $ — $ 1,848 $ — $ 697,888 3 % $ 69 2 767,048 — — 48,906 38 815,992 4 165 3 743,123 877,210 3,314 474,067 806 2,098,520 9 274 4 1,237,772 692,971 46,375 680,223 477 2,657,818 11 738 5 1,986,761 670,402 72,512 993,628 1,700 3,725,003 15 8,265 6 2,511,290 1,410,387 27,263 717,062 17,027 4,683,029 19 12,054 7 2,708,707 509,616 18,378 641,345 30,925 3,908,971 16 20,409 8 1,743,364 136,771 — 269,407 16,699 2,166,241 9 22,514 9 1,101,873 77,139 31,909 169,586 13,007 1,393,514 6 17,484 10 563,635 21,229 18,536 59,592 2,153 665,145 3 10,197 11 495,140 — — 81,682 2,302 579,124 2 13,454 12 262,906 15,158 — 28,807 1,074 307,945 1 8,471 13 232,823 — — 32,966 1,126 266,915 1 8,142 14,15,16 263,076 — — 43,400 626 307,102 1 29,318 Collectively evaluated for impairment 15,313,558 4,410,883 218,287 4,242,519 87,960 24,273,207 100 151,554 Individually evaluated for impairment 82,438 — — 1,563 — 84,001 — 6,196 Purchased credit-impaired loans 25,925 — — 4,155 820 30,900 — 848 Total commercial loans $ 15,421,921 $ 4,410,883 $ 218,287 $ 4,248,237 $ 88,780 $ 24,388,108 100 % $ 158,598 (a) Balances presented net of a $ 19.1 million valuation allowance. December 31, 2018 (Dollars in thousands) General C&I Loans to Mortgage Companies TRUPS (a) Income CRE Residential CRE Total Percentage of Total Allowance for Loan Losses PD Grade: 1 $ 610,177 $ — $ — $ 12,586 $ — $ 622,763 3 % $ 100 2 835,776 — — 1,688 29 837,493 4 274 3 782,362 716,971 — 289,594 147 1,789,074 9 315 4 1,223,092 394,862 43,220 563,243 — 2,224,417 11 686 5 1,920,034 277,814 77,751 798,509 14,150 3,088,258 15 8,919 6 1,722,136 365,341 45,609 657,628 33,759 2,824,473 14 8,141 7 2,690,784 96,603 11,446 538,909 26,135 3,363,877 16 16,906 8 1,337,113 53,224 — 265,901 20,320 1,676,558 8 18,545 9 1,472,852 96,292 45,117 455,184 29,849 2,099,294 10 15,454 10 490,795 13,260 18,536 60,803 3,911 587,305 3 8,675 11 311,967 — — 66,986 788 379,741 2 7,973 12 244,867 9,379 — 82,574 5,717 342,537 2 6,972 13 285,987 — 5,786 55,408 251 347,432 2 10,094 14,15,16 224,853 — — 28,835 837 254,525 1 23,307 Collectively evaluated for impairment 14,152,795 2,023,746 247,465 3,877,848 135,893 20,437,747 100 126,361 Individually evaluated for impairment 45,704 — 2,888 1,966 — 50,558 — 1,074 Purchased credit-impaired loans 41,730 — — 12,730 2,433 56,893 — 2,823 Total commercial loans $ 14,240,229 $ 2,023,746 $ 250,353 $ 3,892,544 $ 138,326 $ 20,545,198 100 % $ 130,258 (a) Balances presented net of a $20.2 million valuation allowance. In 3Q18, FHN sold $55.5 million of TRUPS loans with a $5.0 million valuation allowance. Upon sale, a gain of $3.8 million was recognized in the Non-Strategic segment within Fixed Income in the Consolidated Statement of Income. An additional TRUPS loan with a principal balance of $3.0 million and a valuation of $.3 million was paid off in fourth quarter 2018.
Loans by FICO Score, Consumer	The following table reflects the percentage of balances outstanding by average, refreshed FICO scores for the HELOC, real estate installment, and permanent mortgage classes of loans as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 HELOC R/E Installment Loans Permanent Mortgage HELOC R/E Installment Loans Permanent Mortgage FICO score 740 or greater 62.0 % 72.9 % 44.8 % 61.4 % 71.3 % 51.8 % FICO score 720-739 8.6 8.3 9.7 8.5 8.8 7.6 FICO score 700-719 7.6 6.1 12.3 7.6 7.0 10.6 FICO score 660-699 10.8 7.7 16.3 10.9 7.6 14.7 FICO score 620-659 4.7 2.6 9.7 5.1 2.8 6.5 FICO score less than 620 (a) 6.3 2.4 7.2 6.5 2.5 8.8 Total 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % (a) For this group, a majority of the loan balances had FICO scores at the time of the origination that exceeded 620 but have since deteriorated as the loans have seasoned.
Accruing and Non-Accruing Loans by Class	The following table reflects accruing and non-accruing loans by class on December 31, 2019 : Accruing Non-Accruing (Dollars in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Accruing Current 30-89 Days Past Due 90+ Days Past Due Total Non- Accruing Total Loans Commercial (C&I): General C&I $ 15,314,292 $ 7,155 $ 237 $ 15,321,684 $ 36,564 $ 14,385 $ 23,363 $ 74,312 $ 15,395,996 Loans to mortgage companies 4,410,883 — — 4,410,883 — — — — 4,410,883 TRUPS (a) 218,287 — — 218,287 — — — — 218,287 Purchased credit-impaired loans 23,840 287 1,798 25,925 — — — — 25,925 Total commercial (C&I) 19,967,302 7,442 2,035 19,976,779 36,564 14,385 23,363 74,312 20,051,091 Commercial real estate: Income CRE 4,242,044 679 — 4,242,723 — 19 1,340 1,359 4,244,082 Residential CRE 87,487 7 — 87,494 — 466 — 466 87,960 Purchased credit-impaired loans 4,752 128 95 4,975 — — — — 4,975 Total commercial real estate 4,334,283 814 95 4,335,192 — 485 1,340 1,825 4,337,017 Consumer real estate: HELOC 1,217,344 9,156 5,669 1,232,169 43,007 4,227 7,472 54,706 1,286,875 R/E installment loans 4,662,783 10,580 5,138 4,678,501 13,001 1,005 2,601 16,607 4,695,108 Purchased credit-impaired loans 18,720 2,770 3,276 24,766 — — — — 24,766 Total consumer real estate 5,898,847 22,506 14,083 5,935,436 56,008 5,232 10,073 71,313 6,006,749 Permanent mortgage 149,663 2,314 4,032 156,009 7,709 71 6,601 14,381 170,390 Credit card & other: Credit card 198,917 1,076 1,178 201,171 — — — — 201,171 Other 291,700 1,802 337 293,839 101 44 189 334 294,173 Purchased credit-impaired loans 323 98 99 520 — — — — 520 Total credit card & other 490,940 2,976 1,614 495,530 101 44 189 334 495,864 Total loans, net of unearned income $ 30,841,035 $ 36,052 $ 21,859 $ 30,898,946 $ 100,382 $ 20,217 $ 41,566 $ 162,165 $ 31,061,111 (a) TRUPS is presented net of the valuation allowance of $ 19.1 million . The following table reflects accruing and non-accruing loans by class on December 31, 2018 : Accruing Non-Accruing (Dollars in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Accruing Current 30-89 Days Past Due 90+ Days Past Due Total Non- Accruing Total Loans Commercial (C&I): General C&I $ 14,153,275 $ 8,234 $ 102 $ 14,161,611 $ 26,325 $ 5,537 $ 5,026 $ 36,888 $ 14,198,499 Loans to mortgage companies 2,023,746 — — 2,023,746 — — — — 2,023,746 TRUPS (a) 247,465 — — 247,465 — — 2,888 2,888 250,353 Purchased credit-impaired loans 39,433 624 1,673 41,730 — — — — 41,730 Total commercial (C&I) 16,463,919 8,858 1,775 16,474,552 26,325 5,537 7,914 39,776 16,514,328 Commercial real estate: Income CRE 3,876,229 626 — 3,876,855 30 — 2,929 2,959 3,879,814 Residential CRE 135,861 — — 135,861 32 — — 32 135,893 Purchased credit-impaired loans 13,308 103 1,752 15,163 — — — — 15,163 Total commercial real estate 4,025,398 729 1,752 4,027,879 62 — 2,929 2,991 4,030,870 Consumer real estate: HELOC 1,443,651 11,653 10,129 1,465,433 49,009 3,314 8,781 61,104 1,526,537 R/E installment loans 4,652,658 10,470 6,497 4,669,625 15,146 1,924 4,474 21,544 4,691,169 Purchased credit-impaired loans 24,096 2,094 5,620 31,810 — — — — 31,810 Total consumer real estate 6,120,405 24,217 22,246 6,166,868 64,155 5,238 13,255 82,648 6,249,516 Permanent mortgage 193,591 2,585 4,562 200,738 11,227 996 9,487 21,710 222,448 Credit card & other: Credit card 188,009 2,133 1,203 191,345 — — — — 191,345 Other 320,551 3,570 526 324,647 110 60 454 624 325,271 Purchased credit-impaired loans 746 611 397 1,754 — — — — 1,754 Total credit card & other 509,306 6,314 2,126 517,746 110 60 454 624 518,370 Total loans, net of unearned income $ 27,312,619 $ 42,703 $ 32,461 $ 27,387,783 $ 101,879 $ 11,831 $ 34,039 $ 147,749 $ 27,535,532 (a) TRUPS is presented net of the valuation allowance of $20.2 million .
Schedule of Troubled Debt Restructurings Occurring During the Year	The following tables reflect portfolio loans that were classified as TDRs during the year ended December 31, 2019 and 2018 : 2019 2018 (Dollars in thousands) Number Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Commercial (C&I): General C&I 4 $ 14,179 $ 14,101 9 $ 27,639 $ 27,190 Total commercial (C&I) 4 14,179 14,101 9 27,639 27,190 Commercial real estate: Income CRE — — — 4 643 637 Total commercial real estate — — — 4 643 637 Consumer real estate: HELOC 74 8,028 7,946 103 9,406 9,283 R/E installment loans 96 10,408 10,445 92 8,077 7,848 Total consumer real estate 170 18,436 18,391 195 17,483 17,131 Permanent mortgage 8 1,771 1,798 8 1,001 1,184 Credit card & other 85 379 358 132 604 570 Total troubled debt restructurings 267 $ 34,765 $ 34,648 348 $ 47,370 $ 46,712
Schedule of Troubled Debt Restructurings within the Previous 12 Months	The following tables present TDRs which re-defaulted during 2019 and 2018 , and as to which the modification occurred 12 months or less prior to the re-default. For purposes of this disclosure, FHN generally defines payment default as 30 or more days past due. 2019 2018 (Dollars in thousands) Number Recorded Investment Number Recorded Investment Commercial (C&I): General C&I — $ — 2 $ 579 Total commercial (C&I) — — 2 579 Consumer real estate: HELOC 7 1,141 6 239 R/E installment loans 3 98 2 146 Total consumer real estate 10 1,239 8 385 Permanent mortgage 1 7 6 749 Credit card & other 32 115 49 239 Total troubled debt restructurings 43 $ 1,361 65 $ 1,952

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Rollforward of the Allowance for Loan Losses by Portfolio Segment	The following table provides a rollforward of the allowance for loan losses by portfolio segment for December 31, 2019 , 2018 and 2017: (Dollars in thousands) C&I (a) Commercial Real Estate (a) Consumer Real Estate Permanent Mortgage Credit Card and Other Total Balance as of January 1, 2019 $ 98,947 $ 31,311 $ 26,439 $ 11,000 $ 12,727 $ 180,424 Charge-offs (33,778 ) (1,181 ) (7,781 ) (393 ) (15,600 ) (58,733 ) Recoveries 6,744 489 17,000 3,148 4,235 31,616 Provision/(provision credit) for loan losses 50,573 5,493 (16,034 ) (4,936 ) 11,904 47,000 Balance as of December 31, 2019 122,486 36,112 19,624 8,819 13,266 200,307 Allowance - individually evaluated for impairment 6,196 — 11,537 7,761 422 25,916 Allowance - collectively evaluated for impairment 115,442 36,112 7,001 1,058 12,813 172,426 Allowance - purchased credit-impaired loans 848 — 1,086 — 31 1,965 Loans, net of unearned as of December 31, 2019: Individually evaluated for impairment 82,438 1,563 100,653 61,593 653 246,900 Collectively evaluated for impairment 19,942,728 4,330,479 5,881,330 108,797 494,691 30,758,025 Purchased credit-impaired loans 25,925 4,975 24,766 — 520 56,186 Total loans, net of unearned income $ 20,051,091 $ 4,337,017 $ 6,006,749 $ 170,390 $ 495,864 $ 31,061,111 Balance as of January 1, 2018 $ 98,211 $ 28,427 $ 39,823 $ 13,113 $ 9,981 $ 189,555 Charge-offs (15,492 ) (783 ) (9,357 ) (477 ) (19,688 ) (45,797 ) Recoveries 4,201 339 19,666 1,421 4,039 29,666 Provision/(provision credit) for loan losses 12,027 3,328 (23,693 ) (3,057 ) 18,395 7,000 Balance as of December 31, 2018 98,947 31,311 26,439 11,000 12,727 180,424 Allowance - individually evaluated for impairment 1,074 — 17,984 9,419 337 28,814 Allowance - collectively evaluated for impairment 95,050 31,311 7,368 1,581 12,263 147,573 Allowance - purchased credit-impaired loans 2,823 — 1,087 — 127 4,037 Loans, net of unearned as of December 31, 2018: Individually evaluated for impairment 48,592 1,966 118,434 70,846 695 240,533 Collectively evaluated for impairment 16,424,006 4,013,741 6,099,272 151,602 515,921 27,204,542 Purchased credit-impaired loans 41,730 15,163 31,810 — 1,754 90,457 Total loans, net of unearned income $ 16,514,328 $ 4,030,870 $ 6,249,516 $ 222,448 $ 518,370 $ 27,535,532 Balance as of January 1, 2017 $ 89,398 $ 33,852 $ 51,424 $ 15,222 $ 12,172 $ 202,068 Charge-offs (17,657 ) (195 ) (13,156 ) (2,179 ) (13,207 ) (46,394 ) Recoveries 4,568 966 22,723 2,509 3,115 33,881 Provision/(provision credit) for loan losses 21,902 (6,196 ) (21,168 ) (2,439 ) 7,901 — Balance as of December 31, 2017 98,211 28,427 39,823 13,113 9,981 189,555 Allowance - individually evaluated for impairment 6,044 132 23,175 12,105 311 41,767 Allowance - collectively evaluated for impairment 89,358 28,291 16,293 1,008 9,670 144,620 Allowance - purchased credit-impaired loans 2,809 4 355 — — 3,168 Loans, net of unearned as of December 31, 2017 Individually evaluated for impairment 43,024 2,407 128,895 84,794 593 259,713 Collectively evaluated for impairment 15,909,110 4,181,908 6,311,817 203,026 613,806 27,219,667 Purchased credit-impaired loans 105,139 30,380 38,530 — 5,500 179,549 Total loans, net of unearned income $ 16,057,273 $ 4,214,695 $ 6,479,242 $ 287,820 $ 619,899 $ 27,658,929 a) In third quarter 2019, FHN corrected a previous mis-classification of commercial loans and reclassified approximately $410 million of market investor CRE loans from the C&I portfolio to the CRE portfolio. These loans were identified during an internal review and assessment by management of certain loan populations, a portion of which relate to loans acquired as part of the Capital Bank merger. The reclassification of these loan balances between regional banking portfolios did not have an impact on FHN’s consolidated period-end or average balance sheet and had an immaterial effect on the allowance for loan losses. No adjustments were made to prior periods as the impact of the reclassification, including the effect on the allowance for loan losses was deemed to be immaterial in all periods.

Premises, Equipment, and Leas_2

Premises, Equipment, and Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	Premises and equipment on December 31 are summarized below: (Dollars in thousands) 2019 2018 Land $ 98,804 $ 107,864 Buildings 428,695 461,665 Leasehold improvements 50,032 30,230 Furniture, fixtures, and equipment 205,493 196,469 Fixed assets held-for-sale (a) 9,719 19,617 Premises and equipment, at cost 792,743 815,845 Less accumulated depreciation and amortization 337,737 321,804 Premises and equipment, net $ 455,006 $ 494,041
Assets and Liabilities, Lessee	The following table provides a detail of the classification of FHN's right-of-use ("ROU") assets and lease liabilities included in the Consolidated Statement of Conditions. (Dollars in thousands) December 31, 2019 Lease Right-of-Use Assets: Classification Operating lease right-of use assets Other assets $ 201,873 Finance lease right-of use assets Other assets 2,037 Total Lease Right-of Use Assets $ 203,910 Lease Liabilities: Operating lease liabilities Other liabilities $ 223,128 Finance lease liabilities Other liabilities 2,708 Total Lease Liabilities $ 225,836
Components of Lease Expense, Other Information, and Supplemental Cash Flow	The following table details the weighted average remaining lease term and discount rate for FHN's operating and finance leases as of December 31, 2019 . Weighted Average Remaining Lease Terms Operating leases 12.36 years Finance leases 9.61 years Weighted Average Discount Rate Operating leases 3.24 % Finance leases 4.77 % The following table provides a detail of the components of lease expense and other lease information for the year ended December 31, 2019 : (Dollars in thousands) 2019 Lease cost Operating lease cost $ 24,797 Finance lease cost: Amortization of right-of-use assets 114 Interest on lease liabilities 135 Short-term lease cost 98 Sublease income (366 ) Total lease cost $ 24,778 Other information (Gain)/loss on right-of-use asset impairment-Operating leases $ 2,551 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases 23,053 Operating cash flows from finance leases 135 Financing cash flows from finance leases 142 Right-of-use assets obtained in exchange for new lease obligations: Operating leases 47,735 Finance leases 1,475
Maturities of Lease Liabilities, Operating	The following table provides a detail of the maturities of FHN's operating and finance lease liabilities as of December 31, 2019 : (Dollars in thousands) December 31, 2019 2020 $ 26,594 2021 24,627 2022 23,553 2023 22,687 2024 22,224 2025 and after 156,524 Total lease payments 276,209 Less lease liability interest (50,373 ) Total $ 225,836
Maturity of Lease Liabilities, Finance	The following table provides a detail of the maturities of FHN's operating and finance lease liabilities as of December 31, 2019 : (Dollars in thousands) December 31, 2019 2020 $ 26,594 2021 24,627 2022 23,553 2023 22,687 2024 22,224 2025 and after 156,524 Total lease payments 276,209 Less lease liability interest (50,373 ) Total $ 225,836
Minimum Future Lease Payments for Noncancelable Operating Leases on Premises and Equipment	Minimum future lease payments for noncancelable operating leases, primarily on premises, on December 31, 2018 are shown below. (Dollars in thousands) December 31, 2018 2019 $ 27,524 2020 24,722 2021 20,954 2022 16,518 2023 13,174 2024 and after 42,370 Total minimum lease payments $ 145,262

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition	The following is a summary of other intangible assets included in the Consolidated Statements of Condition: December 31, 2019 December 31, 2018 (Dollars in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Value Gross Carrying Amount Accumulated Amortization Net Carrying Value Core deposit intangibles $ 157,150 $ (47,372 ) $ 109,778 $ 157,150 $ (28,150 ) $ 129,000 Customer relationships 77,865 (60,150 ) 17,715 77,865 (55,597 ) 22,268 Other (a) 5,622 (2,915 ) 2,707 5,622 (1,856 ) 3,766 Total $ 240,637 $ (110,437 ) $ 130,200 $ 240,637 $ (85,603 ) $ 155,034 (a) Balance primarily includes noncompete covenants, as well as $ .3 million related to state banking licenses not subject to amortization.
Schedule of Estimated Aggregate Amortization Expense for Intangible Assets	As of December 31, 2019 the estimated aggregated amortization expense is expected to be: (Dollars in thousands) Year Amortization 2020 $ 21,159 2021 19,547 2022 17,412 2023 16,117 2024 14,679
Summary of Gross Goodwill and Accumulated Impairment Losses and Write-Offs Detailed By Reportable Segments	The following is a summary of goodwill by reportable segment included in the Consolidated Statements of Condition as of December 31, 2019 , 2018 and 2017. (Dollars in thousands) Regional Banking Fixed Income Total December 31, 2016 $ 93,367 $ 98,004 $ 191,371 Additions (a) 1,150,518 44,964 1,195,482 December 31, 2017 $ 1,243,885 $ 142,968 $ 1,386,853 Additions (a) 45,934 — 45,934 December 31, 2018 $ 1,289,819 $ 142,968 $ 1,432,787 Additions — — — December 31, 2019 $ 1,289,819 $ 142,968 $ 1,432,787 (a) See Note 2 - Acquisitions and Divestitures for further details regarding goodwill related to acquisitions.

Time Deposit Maturities (Tables

Time Deposit Maturities (Tables)	12 Months Ended
	Dec. 31, 2019
Maturities of Time Deposits [Abstract]
Schedule of Time Deposits Included in Interest-Bearing Deposits	Following is a table of maturities for time deposits outstanding on December 31, 2019 , which include Certificates of deposit under $100,000, Other time, and Certificates of deposit $100,000 and more. Certificates of deposit in increments of $100,000 or more totaled $2.2 billion on December 31, 2019 , of this amount $.9 billion represents Certificates of deposit of $250,000 and more. Time deposits are included in Interest-bearing deposits on the Consolidated Statements of Condition. (Dollars in thousands) 2020 $ 2,824,792 2021 259,290 2022 382,508 2023 90,034 2024 43,025 2025 and after 18,688 Total $ 3,618,337

Short-term borrowings (Tables)

Short-term borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Short-term Debt	The detail of short-term borrowings for the years 2019 , 2018 and 2017 is presented in the following table: (Dollars in thousands) Federal Funds Purchased Securities Sold Under Agreements to Repurchase Trading Liabilities Other Short-term Borrowings 2019 Average balance $ 737,715 $ 701,164 $ 503,302 $ 538,249 Year-end balance 548,344 716,925 505,581 2,253,045 Maximum month-end outstanding 1,281,853 772,092 754,220 2,276,139 Average rate for the year 2.08 % 1.89 % 2.48 % 2.34 % Average rate at year-end 1.55 1.72 2.07 2.14 2018 Average balance $ 405,110 $ 713,841 $ 682,943 $ 1,046,585 Year-end balance 256,567 762,592 335,380 114,764 Maximum month-end outstanding 503,138 891,425 890,717 2,229,155 Average rate for the year 1.89 % 1.40 % 2.83 % 1.82 % Average rate at year-end 2.50 1.66 3.21 2.48 2017 Average balance $ 447,137 $ 578,666 $ 685,891 $ 554,502 Year-end balance 399,820 656,602 638,515 2,626,213 Maximum month-end outstanding 568,490 743,684 896,943 2,626,213 Average rate for the year 1.06 % 0.72 % 2.26 % 1.28 % Average rate at year-end 1.48 0.64 2.22 1.44

Term Borrowings (Tables)

Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Information Pertaining to Term Borrowings	The following table presents information pertaining to Term Borrowings reported on FHN’s Consolidated Statements of Condition on December 31 : ( Dollars in thousands ) 2019 2018 First Horizon Bank: Senior capital notes (a) Maturity date – December 1, 2019 – 2.95% $ — $ 395,872 Other collateralized borrowings – Maturity date – December 22, 2037 2.19% on December 31, 2019 and 3.09% on December 31, 2018 (b) 80,908 76,642 Other collateralized borrowings - SBA loans (c) 21,975 16,607 First Horizon National Corporation: Senior capital notes (a) Maturity date – December 15, 2020 – 3.50% 497,656 486,739 Junior subordinated debentures (d) Maturity date - June 28, 2035 - 3.57% on December 31, 2019 and 4.47% on December 31, 2018 2,752 2,730 Maturity date - December 15, 2035 - 3.26% on December 31, 2019 and 4.16% on December 31, 2018 17,642 17,456 Maturity date - March 15, 2036 - 3.29% on December 31, 2019 and 4.19% on December 31, 2018 8,847 8,757 Maturity date - March 15, 2036 - 3.43% on December 31, 2019 and 4.33% on December 31, 2018 11,692 11,587 Maturity date - June 30, 2036 - 3.28% on December 31, 2019 and 4.12% on December 31, 2018 26,217 25,931 Maturity date - July 7, 2036 - 3.54% on December 31, 2019 and 3.99% on December 31, 2018 17,964 17,803 Maturity date - June 15, 2037 - 3.54% on December 31, 2019 and 4.44% on December 31, 2018 50,681 50,278 Maturity date - September 6, 2037 - 3.32% on December 31, 2019 and 4.17% on December 31, 2018 8,798 8,713 FT Real Estate Securities Company, Inc.: Cumulative preferred stock (e) Maturity date – March 31, 2031 – 9.50% 46,236 46,168 First Horizon ABS Trusts: Other collateralized borrowings (f) (g) Maturity date – October 25, 2034 2.66% on December 31, 2018 — 2,981 First Tennessee New Markets Corporation Investments: Maturity date – August 08, 2036 – 2.38% (f) — 2,699 Total $ 791,368 $ 1,170,963 (a) Changes in the fair value of debt attributable to interest rate risk are hedged. First Horizon Bank early redeemed the senior debt on November 1, 2019. Refer to Note 22 – Derivatives. (b) Secured by trust preferred loans. (c) Collateralized borrowings associated with SBA loan sales that did not meet sales criteria. The loans have remaining terms of 3 to 25 years. These borrowings had a weighted average interest rate of 3.95 percent on December 31, 2019 and 2018, respectively. (d) Acquired in conjunction with the acquisition of CBF. A portion qualifies for Tier 2 capital under the risk-based capital guidelines. (e) A portion qualifies for Tier 2 capital under the risk-based capital guidelines. (f) Debt retired during 2019. See Note 21- Variable Interest Entities for additional information. (g) On December 31, 2018 , borrowings secured by $16.2 million of residential real estate loans.
Schedule of Annual Principal Repayment Requirements	Annual principal repayment requirements as of December 31, 2019 are as follows: ( Dollars in thousands ) 2020 $ 500,000 2021 — 2022 236 2023 — 2024 — 2025 and after 316,661

Regulatory Capital and Restri_2

Regulatory Capital and Restrictions (Tables)	12 Months Ended
	Dec. 31, 2019
Brokers and Dealers [Abstract]
Summary Of Actual Capital Amounts And Ratios	The actual capital amounts and ratios of FHN and First Horizon Bank are presented in the table below. (Dollars in thousands) First Horizon National Corporation First Horizon Bank Amount Ratio Amount Ratio On December 31, 2019 Actual: Total Capital $ 4,154,885 11.22 % $ 3,944,613 10.77 % Tier 1 Capital 3,760,450 10.15 3,728,683 10.18 Common Equity Tier 1 3,408,936 9.20 3,433,867 9.38 Leverage 3,760,450 9.04 3,728,683 9.12 Minimum Requirement for Capital Adequacy Purposes: Total Capital 2,963,663 8.00 2,930,159 8.00 Tier 1 Capital 2,222,747 6.00 2,197,620 6.00 Common Equity Tier 1 1,667,060 4.50 1,648,215 4.50 Leverage 1,663,338 4.00 1,634,695 4.00 Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions: Total Capital 3,662,699 10.00 Tier 1 Capital 2,930,159 8.00 Common Equity Tier 1 2,380,755 6.50 Leverage 2,043,368 5.00 On December 31, 2018 Actual: Total Capital $ 3,940,117 11.94 % $ 3,689,180 11.32 % Tier 1 Capital 3,565,373 10.80 3,492,541 10.72 Common Equity Tier 1 3,223,702 9.77 3,197,725 9.81 Leverage 3,565,373 9.09 3,492,541 9.10 Minimum Requirement for Capital Adequacy Purposes: Total Capital 2,640,208 8.00 2,607,406 8.00 Tier 1 Capital 1,980,156 6.00 1,955,555 6.00 Common Equity Tier 1 1,485,117 4.50 1,466,666 4.50 Leverage 1,568,870 4.00 1,535,279 4.00 Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions: Total Capital 3,259,258 10.00 Tier 1 Capital 2,607,406 8.00 Common Equity Tier 1 2,118,518 6.50 Leverage 1,919,099 5.00

Other Income and Other Expense

Other Income and Other Expense (Tables)	12 Months Ended
	Dec. 31, 2019
Other Nonoperating Income (Expense) [Abstract]
Other Income And Other Expense	Following is detail of All other income and commissions and All other expense as presented in the Consolidated Statements of Income: (Dollars in thousands) 2019 2018 2017 All other income and commissions: Other service charges $ 20,986 $ 15,122 $ 12,532 ATM and interchange fees 16,539 13,354 12,425 Deferred compensation (a) 11,223 (3,224 ) 6,322 Mortgage banking 10,055 10,587 4,649 Dividend income (b) 7,186 10,555 — Letter of credit fees 5,582 5,298 4,661 Electronic banking fees 4,927 5,134 5,082 Insurance commissions 2,125 2,096 2,514 Gain/(loss) on extinguishment of debt (c) 58 (15 ) (14,329 ) Other 32,277 16,902 10,061 Total $ 110,958 $ 75,809 $ 43,917 All other expense: Travel and entertainment $ 12,119 $ 16,442 $ 11,462 Other insurance and taxes 10,179 9,684 9,686 Customer relations 9,098 5,583 5,750 Supplies 6,918 6,917 4,106 Employee training and dues 5,141 7,218 5,551 Miscellaneous loan costs 4,128 3,732 2,751 Litigation and regulatory matters 2,923 644 40,517 Non-service components of net periodic pension and post-retirement cost 2,304 5,251 2,144 Tax credit investments 1,809 4,712 3,468 OREO 1,479 2,630 1,006 Repurchase and foreclosure provision/(provision credit) (1,007 ) (1,039 ) (22,527 ) Other 71,039 73,223 48,693 Total $ 126,130 $ 134,997 $ 112,607 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Amounts are driven by market conditions and are mirrored by changes in deferred compensation expense which is included in employee compensation expense. (b) Effective January 1, 2018, FHN adopted ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” and began recording dividend income from FRB and FHLB holdings in Other income. Prior to 2018, these amounts were included in Interest income on the Consolidated Statements of Income. (c)

Components of Other Comprehen_2

Components of Other Comprehensive Income/(Loss) (Tables)	12 Months Ended
	Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income/(Loss)	The following table provides the changes in accumulated other comprehensive income/(loss) by component, net of tax, for the years ended December 31, 2019 , 2018 , and 2017 : (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of December 31, 2016 $ (17,232 ) $ (1,265 ) $ (229,157 ) $ (247,654 ) Net unrealized gains/(losses) (4,467 ) (2,156 ) (13,377 ) (20,000 ) Amounts reclassified from AOCI (298 ) (2,945 ) 5,618 2,375 Other comprehensive income/(loss) (4,765 ) (5,101 ) (7,759 ) (17,625 ) Balance as of December 31, 2017 (21,997 ) (6,366 ) (236,916 ) (265,279 ) Adjustment to reflect adoption of ASU 2018-02 (4,837 ) (1,398 ) (51,311 ) (57,546 ) Balance as of December 31, 2017, as adjusted (26,834 ) (7,764 ) (288,227 ) (322,825 ) Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12 (5 ) (206 ) — (211 ) Beginning balance, as adjusted (26,839 ) (7,970 ) (288,227 ) (323,036 ) Net unrealized gains/(losses) (48,858 ) (6,284 ) (9,435 ) (64,577 ) Amounts reclassified from AOCI (39 ) 2,142 8,894 10,997 Other comprehensive income/(loss) (48,897 ) (4,142 ) (541 ) (53,580 ) Balance as of December 31, 2018 (75,736 ) (12,112 ) (288,768 ) (376,616 ) Net unrealized gains/(losses) 106,614 11,234 7,208 125,056 Amounts reclassified from AOCI 201 4,105 7,646 11,952 Other comprehensive income/(loss) 106,815 15,339 14,854 137,008 Balance as of December 31, 2019 $ 31,079 $ 3,227 $ (273,914 ) $ (239,608 )
Reclassification Out of Accumulated Other Comprehensive Income	Reclassifications from AOCI, and related tax effects, were as follows: (Dollars in thousands) Details about AOCI 2019 2018 2017 Affected line item in the statement where net income is presented Securities AFS: Realized (gains)/losses on securities AFS $ 267 $ (52 ) $ (483 ) Debt securities gains/(losses), net Tax expense/(benefit) (66 ) 13 185 Provision/(benefit) for income taxes 201 (39 ) (298 ) Cash flow hedges: Realized (gains)/losses on cash flow hedges 5,452 2,845 (4,771 ) Interest and fees on loans Tax expense/(benefit) (1,347 ) (703 ) 1,826 Provision/(benefit) for income taxes 4,105 2,142 (2,945 ) Pension and Postretirement Plans: Amortization of prior service cost and net actuarial gain/(loss) 10,156 11,814 9,101 All other expense Tax expense/(benefit) (2,510 ) (2,920 ) (3,483 ) Provision/(benefit) for income taxes 7,646 8,894 5,618 Total reclassification from AOCI $ 11,952 $ 10,997 $ 2,375

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Components of Consolidated Statements of Income and Equity	The aggregate amount of income taxes included in the Consolidated Statements of Income and the Consolidated Statements of Equity for the years ended December 31, were as follows: (Dollars in thousands) 2019 2018 2017 Consolidated Statements of Income: Income tax expense/(benefit) $ 133,291 $ 157,602 $ 131,892 Consolidated Statements of Equity: Income tax expense/(benefit) related to: Net unrealized gains/(losses) on pension and other postretirement plans 4,876 (177 ) (832 ) Net unrealized gains/(losses) on securities available-for-sale 35,062 (16,054 ) (2,955 ) Net unrealized gains/(losses) on cash flow hedges 5,035 (1,360 ) (3,163 ) Total $ 178,264 $ 140,011 $ 124,942
Schedule of Components of Income Tax Expense/(Benefit)	The components of income tax expense/(benefit) for the years ended December 31, were as follows: (Dollars in thousands) 2019 2018 2017 Current: Federal $ 105,294 $ 44,088 $ 10,012 State 13,640 9,957 879 Deferred: Federal 5,091 81,852 114,059 State 9,266 21,705 6,942 Total $ 133,291 $ 157,602 $ 131,892
Schedule of Computation of Income Tax Expense Differed from The Amounts Computed By Applying Statutory Federal Income Tax Rate To Income/(Loss) From Continuing Operations Before Income Taxes	A reconciliation of expected income tax expense/(benefit) at the federal statutory rate of 21 percent for 2019 and 2018, respectively, and 35 percent for 2017 to the total income tax expense follows: (Dollars in thousands) 2019 2018 2017 Federal income tax rate 21% 21% 35% Tax computed at statutory rate $ 122,989 $ 149,963 $ 108,105 Increase/(decrease) resulting from: State income taxes, net of federal income tax benefit 15,319 24,553 4,753 Bank-owned life insurance (“BOLI”) (4,915 ) (3,626 ) (8,401 ) 401(k) – employee stock ownership plan (“ESOP”) (764 ) (653 ) (904 ) Tax-exempt interest (6,480 ) (6,538 ) (7,890 ) Non-deductible expenses 10,609 8,301 7,558 LIHTC credits and benefits, net of amortization (4,419 ) (7,178 ) (5,327 ) Other tax credits — (2,825 ) (2,480 ) Change in valuation allowance – DTA (74 ) (73 ) (40,473 ) Other changes in unrecognized tax benefits 4,044 6,143 46 Effect of Tax Act — (6,746 ) 82,027 Other (3,018 ) (3,719 ) (5,122 ) Total $ 133,291 $ 157,602 $ 131,892
Net DTA Balances Related to Income Tax Carryforwards	As of December 31, 2019 , FHN had net deferred tax asset balances related to federal and state income tax carryforwards of $43.8 million and $1.2 million , respectively, which will expire at various dates as follows: (Dollars in thousands) Expiration Dates Net Deferred Tax Asset Balance Losses-federal 2028-2033 $ 43,774 Net operating losses-states 2020-2022 62 Net operating losses-states 2025-2035 1,124
Schedule of Deferred Tax Assets and Liabilities	Temporary differences which gave rise to deferred tax assets and deferred tax liabilities on December 31 , 2019 and 2018 were as follows: (Dollars in thousands) 2019 2018 Deferred tax assets: Loss reserves $ 58,251 $ 65,015 Employee benefits 68,254 64,843 Accrued expenses 4,340 15,763 Lease liability 55,543 — Federal loss carryforwards 43,774 49,821 State loss carryforwards 1,186 7,225 Investment in debt securities (ASC 320) (a) — 24,863 Other 19,255 27,168 Gross deferred tax assets 250,603 254,698 Valuation allowance — (74 ) Deferred tax assets after valuation allowance $ 250,603 $ 254,624 Deferred tax liabilities: Depreciation and amortization $ 50,725 $ 51,519 Investment in debt securities (ASC 320) (a) 10,154 — Equity investments 3,656 7,705 Other intangible assets 56,352 57,632 Prepaid expenses 10,024 9,218 ROU lease asset 50,151 — Other 540 683 Gross deferred tax liabilities 181,602 126,757 Net deferred tax assets $ 69,001 $ 127,867 (a) Tax effects of unrealized gains and losses are tracked on a security-by-security basis.
Schedule of Rollforward of Unrecognized Tax Benefits	The rollforward of unrecognized tax benefits is shown below: (Dollars in thousands) Balance at December 31, 2017 $ 4,271 Increases related to prior year tax positions 16,695 Increases related to current year tax positions 1,576 Settlements (2,080 ) Lapse of statutes (278 ) Balance at December 31, 2018 $ 20,184 Increases related to prior year tax positions 2,522 Increases related to current year tax positions 2,170 Lapse of statutes (460 ) Balance at December 31, 2019 $ 24,416

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Reconciliation of Earnings/(Loss) Per Common and Diluted Share	The following table provides reconciliations of net income to net income available to common shareholders and the difference between average basic common shares outstanding and average diluted common shares outstanding: (Dollars and shares in thousands, except per share data) 2019 2018 2017 Net income/(loss) $ 452,373 $ 556,507 $ 176,980 Net income attributable to noncontrolling interest 11,465 11,465 11,465 Net income/(loss) attributable to controlling interest 440,908 545,042 165,515 Preferred stock dividends 6,200 6,200 6,200 Net income/(loss) available to common shareholders $ 434,708 $ 538,842 $ 159,315 Weighted average common shares outstanding—basic 313,637 324,375 241,436 Effect of dilutive securities 2,020 3,070 3,017 Weighted average common shares outstanding—diluted 315,657 327,445 244,453 Net income/(loss) per share available to common shareholders $ 1.39 $ 1.66 $ 0.66 Diluted income/(loss) per share available to common shareholders $ 1.38 $ 1.65 $ 0.65
Schedule of Anti-Dilutive Options and Awards	The following table presents outstanding options and other equity awards that were excluded from the calculation of diluted earnings per share because they were either anti-dilutive (the exercise price was higher than the weighted-average market price for the period) or the performance conditions have not been met: (Shares in thousands) 2019 2018 2017 Stock options excluded from the calculation of diluted EPS 2,359 2,256 2,468 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 21.12 $ 24.33 $ 25.62 Other equity awards excluded from the calculation of diluted EPS 2,224 608 176

Pension, Savings, and Other E_2

Pension, Savings, and Other Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Schedule of Actuarial Assumptions Used	The actuarial assumptions used in the defined benefit pension plans and other employee benefit plans were as follows: Benefit Obligations Net Periodic Benefit Cost 2019 2018 2017 2019 2018 2017 Discount rate Qualified pension 3.31% 4.43% 3.76% 4.43% 3.75% 4.37% Nonqualified pension 3.08% 4.26% 3.59% 4.26% 3.59% 4.07% Other nonqualified pension 2.57% 3.83% 3.19% 3.83% 3.19% 3.39% Postretirement benefits 2.85% - 3.44% 4.03% - 4.56% 3.37% - 3.87% 4.04% - 4.56% 3.35% - 3.87% 3.68% - 4.57% Expected long-term rate of return Qualified pension/ postretirement benefits N/A N/A N/A 4.80% 4.20% 4.50% Postretirement benefit (retirees post January 1, 1993) N/A N/A N/A 6.85% 5.95% 6.00% Postretirement benefit (retirees prior to January 1, 1993) N/A N/A N/A 0.05% 2.15% 2.15%
Schedule of Projected Benefit Obligation and Interest Credit Rates	FHN has one pension plan where participants' benefits are affected by interest crediting rates. The plan's projected benefit obligation as of December 31, 2019, 2018 and 2017 and interest crediting rates for the respective years are: (Dollars in thousands) 2019 2018 2017 Projected benefit obligation $ 16,213 $ 16,947 $ 19,115 Interest crediting rate 9.66 % 10.12 % 9.28 %
Schedule of Components of Net Periodic Benefit Cost	The components of net periodic benefit cost for the plan years 2019 , 2018 and 2017 are as follows: (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2017 2019 2018 2017 Components of net periodic benefit cost Service cost $ 30 $ 41 $ 37 $ 94 $ 133 $ 107 Interest cost 30,207 27,877 29,380 1,413 1,309 1,305 Expected return on plan assets (36,908 ) (32,897 ) (36,015 ) (1,136 ) (1,074 ) (947 ) Amortization of unrecognized: Prior service cost/(credit) — — 52 32 — 95 Actuarial (gain)/loss 9,888 12,102 9,521 (493 ) (387 ) (567 ) Net periodic benefit cost 3,217 7,123 2,975 (90 ) (19 ) (7 ) ASC 715 settlement expense — — 43 194 99 — Total periodic benefit costs $ 3,217 $ 7,123 $ 3,018 $ 104 $ 80 $ (7 )
Schedule of Plan's Benefit Obligations and Plan Assets	The following tables set forth the plans’ benefit obligations and plan assets for 2019 and 2018 : (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2019 2018 Change in benefit obligation Benefit obligation, beginning of year $ 765,309 $ 840,884 $ 35,174 $ 39,562 Service cost 30 41 94 133 Interest cost 30,207 27,877 1,413 1,309 Plan Amendments — — 408 — Actuarial (gain)/loss (a) 102,775 (68,724 ) 6,848 (3,648 ) Actual benefits paid (38,450 ) (34,769 ) (1,641 ) (2,182 ) Premium paid for annuity purchase (b) (23,997 ) — — — Benefit obligation, end of year $ 835,874 $ 765,309 $ 42,296 $ 35,174 Change in plan assets Fair value of plan assets, beginning of year $ 730,953 $ 811,244 $ 17,432 $ 18,753 Actual return on plan assets 154,054 (49,470 ) 3,355 (928 ) Employer contributions 3,510 3,948 1,259 1,789 Actual benefits paid – settlement payments — — (1,641 ) (2,182 ) Actual benefits paid – other payments (38,450 ) (34,769 ) — — Premium paid for annuity purchase (b) (23,997 ) — — — Fair value of plan assets, end of year $ 826,070 $ 730,953 $ 20,405 $ 17,432 Funded (unfunded) status of the plans $ (9,804 ) $ (34,356 ) $ (21,891 ) $ (17,742 ) Amounts recognized in the Statements of Condition Other assets $ 27,433 $ 1,911 $ 17,240 $ 14,356 Other liabilities (37,237 ) (36,267 ) (39,131 ) (32,098 ) Net asset/(liability) at end of year $ (9,804 ) $ (34,356 ) $ (21,891 ) $ (17,742 ) (a) Variances in the actuarial (gain)/loss are due to normal activity such as changes in discount rates, updates to participant demographic information and revisions to life expectancy assumptions. (b) 2019 amounts represent settlements of certain retired participants in the qualified pension plan that occurred during the year.
Schedule of Funded Status for Pension and Post Retirement Plans	The projected benefit obligation for unfunded plans are as follows: Total Pension Benefits Other Benefits (Dollars in thousands 2019 2018 2019 2018 Projected benefit obligation $ 37,237 $ 36,267 $ 39,131 $ 32,098
Schedule of Defined Benefit Plan Balances Reflected in AOCI on Pre-tax Basis	Balances reflected in accumulated other comprehensive income on a pre-tax basis for the years ended December 31, 2019 and 2018 consist of: (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2019 2018 Amounts recognized in accumulated other comprehensive income Prior service cost/(credit) $ — $ — $ 408 $ — Net actuarial (gain)/loss 362,799 387,058 (1,555 ) (6,451 ) Total $ 362,799 $ 387,058 $ (1,147 ) $ (6,451 )
Schedule of Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income on Pre-tax Basis	The pre-tax amounts recognized in other comprehensive income during 2019 and 2018 were as follows: (Dollars in thousands) Total Pension Benefits Other Benefits 2019 2018 2019 2018 Changes in plan assets and benefit obligation recognized in other comprehensive income Net actuarial (gain)/loss arising during measurement period $ (14,371 ) $ 13,643 $ 4,629 $ (1,646 ) Prior service cost/(credit) arising during measurement period — — 408 — Items amortized during the measurement period: Prior service credit/(cost) — — (32 ) — Net actuarial gain/(loss) (9,888 ) (12,102 ) 299 288 Total recognized in other comprehensive income $ (24,259 ) $ 1,541 $ 5,304 $ (1,358 )
Schedule of Expected Benefit Payments	The following table provides detail on expected benefit payments, which reflect expected future service, as appropriate: (Dollars in thousands) Pension Benefits Other Benefits 2020 $ 38,304 $ 1,675 2021 40,215 1,744 2022 41,152 1,818 2023 42,631 1,897 2024 43,752 1,977 2025-2029 231,267 11,127
Schedule of Fair Value of Pension Plan Assets	The fair value of FHN’s pension plan assets at December 31, 2019 and 2018 , by asset category classified using the Fair Value measurement hierarchy is shown in the table below. See Note 24 – Fair Value of Assets and Liabilities for more details about Fair Value measurements. (Dollars in thousands) December 31, 2019 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 9,300 $ — $ — $ 9,300 Fixed income securities: U.S. treasuries — 5,377 — 5,377 Corporate, municipal and foreign bonds — 514,965 — 514,965 Common and collective funds: Fixed income — 296,428 — 296,428 Total $ 9,300 $ 816,770 $ — $ 826,070 (Dollars in thousands) December 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 13,855 $ — $ — $ 13,855 Fixed income securities: U.S. treasuries — 28,626 — 28,626 Corporate, municipal and foreign bonds — 688,472 — 688,472 Total $ 13,855 $ 717,098 $ — $ 730,953
Schedule of Fair Value of Retiree Medical Plan Assets	The fair value of FHN’s retiree medical plan assets at December 31, 2019 and 2018 by asset category are as follows: (Dollars in thousands) December 31, 2019 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 130 $ — $ — $ 130 Mutual funds: Equity mutual funds 13,163 — — 13,163 Fixed income mutual funds 7,112 — — 7,112 Total $ 20,405 $ — $ — $ 20,405 (Dollars in thousands) December 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents and money market funds $ 207 $ — $ — $ 207 Mutual funds: Equity mutual funds 10,387 — — 10,387 Fixed income mutual funds 6,838 — — 6,838 Total $ 17,432 $ — $ — $ 17,432

Stock Options, Restricted Sto_2

Stock Options, Restricted Stock, and Dividend Reinvestment Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Restricted and Performance Stock Activity	A summary of restricted and performance stock and unit activity during the year ended December 31, 2019 , is presented below: Shares/ Units (a) Weighted average grant date fair value (per share) (b) January 1, 2019 4,089,824 $ 16.27 Shares/units granted 1,761,343 14.93 Shares/units vested/distributed (1,042,270 ) 13.99 Shares/units cancelled (120,649 ) 17.43 December 31, 2019 4,688,248 $ 16.25 (a) Includes only units that settle in shares and nonvested performance units are included at 100% payout level. (b) The weighted average grant date fair value for shares/units granted in 2018 and 2017 was $18.70 and $18.83 , respectively.
Schedule of Stock Options	The summary of stock option activity for the year ended December 31, 2019 , is shown below: Options Outstanding Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (thousands) January 1, 2019 5,904,687 $ 16.16 Options granted 530,787 15.43 Options exercised (895,695 ) 10.79 Options expired/cancelled (607,998 ) 27.94 December 31, 2019 4,931,781 15.61 3.08 $ 13,385 Options exercisable 3,347,210 15.76 2.32 10,060 Options expected to vest 1,584,571 15.28 4.68 3,325
Schedule of Valuation Assumptions, Stock Options	FHN used the Black-Scholes Option Pricing Model to estimate the fair value of stock options granted or converted in 2019 , 2018 , and 2017 with the following assumptions: 2019 2018 2017 Expected dividend yield 3.63% 2.57% 1.82% Expected weighted-average lives of options granted 6.24 years 6.21 years 6.09 years Expected weighted-average volatility 24.76% 24.61% 26.90% Expected volatility range 23.07 - 26.45% 23.95 - 25.26% 24.36 - 29.44% Risk-free interest rate 2.53% 2.69% 2.07%

Business Segment Information (T

Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting, Measurement Disclosures [Abstract]
Amounts of Consolidated Revenue, Expense, Tax and Assets	The following table reflects the amounts of consolidated revenue, expense, tax, and average assets, as well as, depreciation and amortization expense and expenditures for long lived assets for each segment for the years ended December 31: (Dollars in thousands) 2019 2018 2017 Consolidated Net interest income $ 1,210,187 $ 1,220,317 $ 842,314 Provision/(provision credit) for loan losses 47,000 7,000 — Noninterest income 654,080 722,788 490,219 Noninterest expense 1,231,603 1,221,996 1,023,661 Income/(loss) before income taxes 585,664 714,109 308,872 Provision/(benefit) for income taxes 133,291 157,602 131,892 Net income/(loss) $ 452,373 $ 556,507 $ 176,980 Average assets $ 41,744,264 $ 40,225,459 $ 29,924,813 Depreciation and amortization $ 65,239 $ 59,125 $ 70,924 Expenditures for long-lived assets 49,159 38,166 287,642 (Dollars in thousands) 2019 2018 2017 Regional Banking Net interest income $ 1,196,318 $ 1,197,471 $ 844,439 Provision/(provision credit) for loan losses 66,059 24,643 21,451 Noninterest income 329,834 311,763 259,546 Noninterest expense 789,033 826,262 628,050 Income/(loss) before income taxes 671,060 658,329 454,484 Provision/(benefit) for income taxes 158,148 154,659 162,348 Net income/(loss) $ 512,912 $ 503,670 $ 292,136 Average assets $ 30,785,775 $ 28,366,987 $ 19,469,287 Depreciation and amortization $ 31,719 $ 31,316 $ 45,734 Expenditures for long-lived assets 35,207 36,164 274,992 Fixed Income Net interest income $ 26,044 $ 35,753 $ 18,122 Noninterest income 278,423 164,769 217,086 Noninterest expense 236,660 189,373 206,427 Income/(loss) before income taxes 67,807 11,149 28,781 Provision/(benefit) for income taxes 16,137 2,097 9,698 Net income/(loss) $ 51,670 $ 9,052 $ 19,083 Average assets $ 2,961,655 $ 3,297,579 $ 2,539,899 Depreciation and amortization $ 8,150 $ 9,603 $ 8,036 Expenditures for long-lived assets 909 646 1,877 Corporate Net interest income/(expense) $ (40,774 ) $ (64,191 ) $ (59,261 ) Noninterest income (a) 41,357 239,263 8,887 Noninterest expense (b) (c) (d) 195,683 177,923 144,333 Income/(loss) before income taxes (195,100 ) (2,851 ) (194,707 ) Provision/(benefit) for income taxes (51,348 ) (10,889 ) (47,967 ) Net income/(loss) $ (143,752 ) $ 8,038 $ (146,740 ) Average assets $ 6,951,611 $ 7,090,069 $ 6,370,951 Depreciation and amortization $ 27,649 $ 23,285 $ 16,764 Expenditures for long-lived assets 12,560 308 8,951 Non-Strategic Net interest income $ 28,599 $ 51,284 $ 39,014 Provision/(provision credit) for loan losses (19,059 ) (17,643 ) (21,451 ) Noninterest income 4,466 6,993 4,700 Noninterest expense 10,227 28,438 44,851 Income/(loss) before income taxes 41,897 47,482 20,314 Provision/(benefit) for income taxes 10,354 11,735 7,813 Net income/(loss) $ 31,543 $ 35,747 $ 12,501 Average assets $ 1,045,223 $ 1,470,824 $ 1,544,676 Depreciation and amortization $ (2,279 ) $ (5,079 ) $ 390 Expenditures for long-lived assets 483 1,048 1,822 Certain previously reported amounts have been reclassified to agree with current presentation. (a) 2018 includes a $212.9 million pre-tax gain from the sale of Visa Class B shares; 2017 includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction. (b) 2019 includes restructuring-related costs associated with efficiency initiatives; refer to Note 25 - Restructuring, Repositioning, and Efficiency for additional information. 2019 and 2018 include acquisition-related expenses; refer to Note 2 - Acquisitions and Divestitures for additional information (c) 2019 includes $21.3 million , respectively, of asset impairments, professional fees, and other customer-contact and technology-related expenses associated with rebranding initiatives. (d) 2019 and 2017 include $11.0 million and $8.8 million , respectively, of contributions to FHN's foundation. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the years ended December 31, 2019, 2018, and 2017: December 31, 2019 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 122 $ 277,561 $ — $ 1,106 $ 278,789 Deposit transactions and cash management 124,832 4 6,610 217 131,663 Brokerage, management fees and commissions 55,462 — — 5 55,467 Trust services and investment management 29,600 — (89 ) — 29,511 Bankcard income 28,540 11 248 (491 ) 28,308 BOLI (b) — — 19,210 — 19,210 Debt securities gains/(losses), net (b) — — (267 ) — (267 ) Equity securities gains/(losses), net (b) — — 441 — 441 All other income and commissions (d) 91,278 847 15,204 3,629 110,958 Total noninterest income $ 329,834 $ 278,423 $ 41,357 $ 4,466 $ 654,080 December 31, 2018 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 417 $ 163,382 $ — $ 4,083 $ 167,882 Deposit transactions and cash management 126,832 12 6,214 223 133,281 Brokerage, management fees and commissions 54,800 — — 3 54,803 Trust services and investment management 29,852 — (46 ) — 29,806 Bankcard income 29,434 — 226 (356 ) 29,304 BOLI (b) — — 18,955 — 18,955 Debt securities gains/(losses), net (b) — — 52 — 52 Equity securities gains/(losses), net (b) (c) — — 212,896 — 212,896 All other income and commissions (d) 70,428 1,375 966 3,040 75,809 Total noninterest income $ 311,763 $ 164,769 $ 239,263 $ 6,993 $ 722,788 December 31, 2017 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income $ 430 $ 216,195 $ — $ — $ 216,625 Deposit transactions and cash management 105,058 3 5,338 193 110,592 Brokerage, management fees and commissions 48,513 — 1 — 48,514 Trust services and investment management 28,491 — (71 ) — 28,420 Bankcard income 25,983 — 225 227 26,435 BOLI — — 15,124 — 15,124 Debt securities gains/(losses), net 386 — 97 — 483 Equity securities gains/(losses), net — — 109 — 109 All other income and commissions (e) 50,685 888 (11,936 ) 4,280 43,917 Total noninterest income $ 259,546 $ 217,086 $ 8,887 $ 4,700 $ 490,219 Certain previously reported amounts have been reclassified to agree with current presentation. (a) For years ended 2019 and 2018, includes $33.7 million and $28.9 million , respectively, of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." 2019 and 2018 include $1.1 million and $4.1 million , respectively, of gains from the reversal of a previous valuation adjustment due to sales and payoffs of TRUPS loans excluded from the scope of ASC 606 in the Non-strategic segment. (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total non-interest income. (c) Includes a pre-tax gain of $212.9 million from the sale of FHN's remaining holdings of Visa Class B shares. (d) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commission in scope of ASC 606. (e) Corporate includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2019
Variable Interest Entities [Abstract]
Summary Of VIEs Consolidated By FHN	The following table summarizes VIEs consolidated by FHN as of December 31, 2019 and December 31, 2018 : December 31, 2019 December 31, 2018 On-Balance Sheet Consumer Loan Securitization Rabbi Trusts Used for Deferred Compensation Plans On-Balance Sheet Consumer Loan Securitization Rabbi Trusts Used for Deferred Compensation Plans ( Dollars in thousands ) Carrying Value Carrying Value Carrying Value Carrying Value Assets: Cash and due from banks $ — N/A $ — N/A Loans, net of unearned income — N/A 16,213 N/A Less: Allowance for loan losses — N/A — N/A Total net loans — N/A 16,213 N/A Other assets — $ 91,873 35 $ 78,446 Total assets $ — $ 91,873 $ 16,248 $ 78,446 Liabilities: Term borrowings $ — N/A $ 2,981 N/A Other liabilities — $ 70,830 — $ 56,700 Total liabilities $ — $ 70,830 $ 2,981 $ 56,700
Summary of the Impact of Qualifying LIHTC Investments	The following table summarizes the impact to the Provision/(benefit) for income taxes on the Consolidated Statements of Income for the years ended December 31, 2019 , 2018 and 2017 for LIHTC investments accounted for under the proportional amortization method. ( Dollars in thousands ) 2019 2018 2017 Provision/(benefit) for income taxes: Amortization of qualifying LIHTC investments $ 15,482 $ 10,793 $ 14,037 Low income housing tax credits (13,539 ) (10,232 ) (11,037 ) Other tax benefits related to qualifying LIHTC investments (5,677 ) (7,370 ) (5,045 )
Summary Of VIEs Not Consolidated By FHN	The following table summarizes FHN’s nonconsolidated VIEs as of December 31, 2019 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type: Low income housing partnerships $ 237,668 $ 136,404 (a) Other tax credit investments (b) (c) 6,282 — Other assets Small issuer trust preferred holdings (d) 238,397 — Loans, net of unearned income On-balance sheet trust preferred securitization 33,265 80,908 (e) Proprietary residential mortgage securitizations 941 — Trading securities Holdings of agency mortgage-backed securities (d) 4,537,685 — (f) Commercial loan troubled debt restructurings (g) 45,169 — Loans, net of unearned income Sale-leaseback transaction 18,111 — (h) Proprietary trust preferred issuances (i) — 167,014 Term borrowings (a) Maximum loss exposure represents $101.3 million of current investments and $136.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2023. (b) A liability is not recognized as investments are written down over the life of the related tax credit. (c) Maximum loss exposure represents current investment balance. As of December 31, 2019, there were no investments funded through loans from community development enterprises. (d) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (e) Includes $112.5 million classified as Loans, net of unearned income, and $1.7 million classified as Trading securities which are offset by $80.9 million classified as Term borrowings. (f) Includes $.5 billion classified as Trading securities and $4.0 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $43.4 million of current receivables and $1.8 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (h) Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor. (i) No exposure to loss due to nature of FHN's involvement. The following table summarizes FHN’s nonconsolidated VIEs as of December 31, 2018 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type: Low income housing partnerships $ 156,056 $ 80,427 (a) Other tax credit investments (b) (c) 3,619 — Other assets Small issuer trust preferred holdings (d) 270,585 — Loans, net of unearned income On-balance sheet trust preferred securitization 37,532 76,642 (e) Proprietary residential mortgage securitizations 1,524 — Trading securities Holdings of agency mortgage-backed securities (d) 4,842,630 — (f) Commercial loan troubled debt restructurings (g) 40,590 — Loans, net of unearned income Sale-leaseback transaction 16,327 — (h) Proprietary trust preferred issuances (i) — 167,014 Term borrowings (a) Maximum loss exposure represents $75.6 million of current investments and $80.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2020. (b) A liability is not recognized as investments are written down over the life of the related tax credit. (c) Maximum loss exposure represents current investment balance. Of the initial investment, $2.7 million was funded through loans from community development enterprises. (d) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (e) Includes $112.5 million classified as Loans, net of unearned income, and $1.7 million classified as Trading securities which are offset by $76.6 million classified as Term borrowings. (f) Includes $.5 billion classified as Trading securities and $4.4 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $38.2 million of current receivables and $ 2.3 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (h) Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor. (i) No exposure to loss due to nature of FHN's involvement.

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives Associated With Fixed Income Trading Activities	The following tables summarize FHN’s derivatives associated with fixed income trading activities as of December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts $ 2,697,522 $ 65,768 $ 6,858 Offsetting Upstream Interest Rate Contracts 2,697,522 2,583 3,994 Option Contracts Purchased 40,000 131 — Forwards and Futures Purchased 9,217,350 17,029 3,187 Forwards and Futures Sold 9,403,112 3,611 16,620 December 31, 2018 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts $ 2,271,448 $ 18,744 $ 27,768 Offsetting Upstream Interest Rate Contracts 2,271,448 4,014 9,041 Option Contracts Purchased 20,000 25 — Forwards and Futures Purchased 4,684,177 28,304 181 Forwards and Futures Sold 4,967,454 522 30,055
Derivatives Associated With Interest Rate Risk Management Activities	The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer Interest Rate Contracts $ 3,044,067 $ 90,394 $ 3,515 Offsetting Upstream Interest Rate Contracts 3,044,067 3,537 9,735 Debt Hedging Hedging Instruments: Interest Rate Swaps $ 500,000 N/A $ 69 Hedged Items: Term Borrowings: Par N/A N/A $ 500,000 Cumulative fair value hedging adjustments N/A N/A (1,604 ) Unamortized premium/(discount) and issuance costs N/A N/A (740 ) Total carrying value N/A N/A $ 497,656 December 31, 2018 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer Interest Rate Contracts $ 2,029,162 $ 20,262 $ 25,880 Offsetting Upstream Interest Rate Contracts 2,029,162 8,154 9,153 Debt Hedging Hedging Instruments: Interest Rate Swaps $ 900,000 $ 127 $ 6 Hedged Items: Term Borrowings: Par N/A N/A $ 900,000 Cumulative fair value hedging adjustments N/A N/A (15,094 ) Unamortized premium/(discount) and issuance costs N/A N/A (2,295 ) Total carrying value N/A N/A $ 882,611
Gains/(Losses) on Derivatives Associated with Interest Rate Risk Management Activities	The following table summarizes gains/(losses) on FHN’s derivatives associated with interest rate risk management activities for the years ended December 31, 2019 , 2018 , and 2017: Year Ended December 31 2019 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer Interest Rate Contracts (a) $ 92,497 $ 1,779 (10,703 ) Offsetting Upstream Interest Rate Contracts (a) (92,497 ) (1,779 ) 10,699 Debt Hedging Hedging Instruments: Interest Rate Swaps (b) $ 13,240 $ (1,648 ) $ (7,766 ) Hedged Items: Term Borrowings (a) (c) (13,234 ) 1,622 7,582 (a) Gains/losses included in All other expense within the Consolidated Statements of Income. (b) Gains/losses included in the Interest expense for 2019 and 2018, and All other expense for 2017 within the Consolidated Statement of Income. (c) Represents gains and losses attributable to changes in fair value due to interest rate risk as designated in ASC 815-20 hedging relationships.
Derivative Associated With Cash Flow Hedges	The following tables summarize FHN’s derivative activities associated with cash flow hedges as of December 31, 2019 and 2018: December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest Rate Swaps $ 900,000 N/A $ 241 Hedged Items: Variability in Cash Flows Related to Debt Instruments (Primarily Loans) N/A $ 900,000 N/A December 31, 2018 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest Rate Swaps $ 900,000 $ 888 $ 5 Hedged Items: Variability in Cash Flows Related to Debt Instruments (Primarily Loans) N/A $ 900,000 N/A
Gains/(Losses) on Derivatives Associated with Cash Flow Hedges	The following table summarizes gains/(losses) on FHN’s derivatives associated with cash flow hedges for the years ended December 31, 2019 , 2018 , and 2017: Year Ended December 31 2019 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Cash Flow Hedges Hedging Instruments: Interest Rate Swaps (a) $ 20,625 $ (5,502 ) $ (8,264 ) Gain/(loss) recognized in Other comprehensive income/(loss) 11,234 (6,284 ) (2,156 ) Gain/(loss) reclassified from AOCI into Interest income 4,105 2,142 (2,945 ) (a) Approximately $1.0 million of cumulative gains are expected to be reclassified into earnings in the next twelve months.
Derivative Assets And Collateral Received	The following table provides details of derivative assets and collateral received as presented on the Consolidated Statements of Condition as of December 31, 2019 and 2018: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized assets Gross amounts offset in the Statements of Condition Net amounts of assets presented in the Statements of Condition (a) Derivative liabilities available for offset Collateral Received Net amount Derivative assets: December 31, 2019 (b) $ 162,344 $ — $ 162,344 $ (5,604 ) $ (143,334 ) $ 13,406 December 31, 2018 (b) 52,562 — 52,562 (12,745 ) (39,637 ) 180 (a) Included in Derivative assets on the Consolidated Statements of Condition. As of December 31, 2019 and 2018, $20.8 million and $28.9 million , respectively, of derivative assets (primarily fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements. (b) Amounts are comprised entirely of interest rate derivative contracts.
Derivative Liabilities and Collateral Pledged	The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Statements of Condition as of December 31, 2019 and 2018: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized liabilities Gross amounts offset in the Statements of Condition Net amounts of liabilities presented in the Statements of Condition (a) Derivative assets available for offset Collateral pledged Net amount Derivative liabilities: December 31, 2019 (b) $ 24,431 $ — $ 24,431 $ (5,604 ) $ (18,689 ) $ 138 December 31, 2018 (b) 71,853 — 71,853 (12,745 ) (54,773 ) 4,335 (a) Included in Derivative liabilities on the Consolidated Statements of Condition. As of December 31, 2019 and 2018, $43.0 million and $61.9 million , respectively, of derivative liabilities (primarily Visa-related derivatives and fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements. (b) Amounts are comprised entirely of interest rate derivative contracts.

Master Netting and Similar Ag_2

Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions (Tables)	12 Months Ended
	Dec. 31, 2019
Offsetting [Abstract]
Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties	The following table provides details of Securities purchased under agreements to resell as presented on the Consolidated Statements of Condition and collateral pledged by counterparties as of December 31: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized assets Gross amounts offset in the Statements of Condition Net amounts of assets presented in the Statements of Condition Offsetting securities sold under agreements to repurchase Securities collateral (not recognized on FHN’s Statements of Condition) Net amount Securities purchased under agreements to resell: 2019 $ 586,629 $ — $ 586,629 $ (21,004 ) $ (562,702 ) $ 2,923 2018 386,443 — 386,443 (261 ) (382,756 ) 3,426
Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company	The following table provides details of Securities sold under agreements to repurchase as presented on the Consolidated Statements of Condition and collateral pledged by FHN as of December 31: Gross amounts not offset in the Statements of Condition (Dollars in thousands) Gross amounts of recognized liabilities Gross amounts offset in the Statements of Condition Net amounts of liabilities presented in the Statements of Condition Offsetting securities purchased under agreements to resell Securities/ government guaranteed loans collateral Net amount Securities sold under agreements to repurchase: 2019 $ 716,925 $ — $ 716,925 $ (21,004 ) $ (695,879 ) $ 42 2018 762,592 — 762,592 (261 ) (762,322 ) 9
Schedule of the Remaining Contractual Maturity by Collateral Type of Securities Sold Under Agreements To Repurchase	The following tables provide details, by collateral type, of the remaining contractual maturity of Securities sold under agreements to repurchase as of December 31: December 31, 2019 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 41,364 $ — $ 41,364 Government agency issued MBS 341,173 4,545 345,718 Other U.S. government agencies 54,924 — 54,924 Government guaranteed loans (SBA and USDA) 274,919 — 274,919 Total Securities sold under agreements to repurchase $ 712,380 $ 4,545 $ 716,925 December 31, 2018 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 16,321 $ — $ 16,321 Government agency issued MBS 414,488 5,220 419,708 Government agency issued CMO 36,688 — 36,688 Government guaranteed loans (SBA and USDA) 289,875 — 289,875 Total Securities sold under agreements to repurchase $ 757,372 $ 5,220 $ 762,592

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured on Recurring Basis	The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2019 : December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 134,844 $ — $ 134,844 Government agency issued MBS — 268,024 — 268,024 Government agency issued CMO — 250,652 — 250,652 Other U.S. government agencies — 124,972 — 124,972 States and municipalities — 120,744 — 120,744 Corporate and other debt — 445,253 — 445,253 Equity, mutual funds, and other — 777 — 777 Total trading securities—fixed income — 1,345,266 — 1,345,266 Trading securities—mortgage banking — — 941 941 Loans held-for-sale (elected fair value) — — 14,033 14,033 Securities available-for-sale: U.S. treasuries — 100 — 100 Government agency issued MBS — 2,348,517 — 2,348,517 Government agency issued CMO — 1,670,492 — 1,670,492 Other U.S. government agencies — 306,092 — 306,092 States and municipalities — 60,526 — 60,526 Corporate and other debt — 40,540 — 40,540 Interest-Only Strip (elected fair value) — — 19,136 19,136 Total securities available-for-sale — 4,426,267 19,136 4,445,403 Other assets: Deferred compensation mutual funds 46,815 — — 46,815 Equity, mutual funds, and other 22,643 — — 22,643 Derivatives, forwards and futures 20,640 — — 20,640 Derivatives, interest rate contracts — 162,413 — 162,413 Derivatives, other — 62 — 62 Total other assets 90,098 162,475 — 252,573 Total assets $ 90,098 $ 5,934,008 $ 34,110 $ 6,058,216 Trading liabilities—fixed income: U.S. treasuries $ — $ 406,380 $ — $ 406,380 Other U.S.government agencies — 88 — 88 Government agency issued MBS — 33 — 33 Corporate and other debt — 99,080 — 99,080 Total trading liabilities—fixed income — 505,581 — 505,581 Other liabilities: Derivatives, forwards and futures 19,807 — — 19,807 Derivatives, interest rate contracts — 24,412 — 24,412 Derivatives, other — 466 22,795 23,261 Total other liabilities 19,807 24,878 22,795 67,480 Total liabilities $ 19,807 $ 530,459 $ 22,795 $ 573,061 The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2018 : December 31, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 169,799 $ — $ 169,799 Government agency issued MBS — 133,373 — 133,373 Government agency issued CMO — 330,456 — 330,456 Other U.S. government agencies — 76,733 — 76,733 States and municipalities — 54,234 — 54,234 Corporates and other debt — 682,068 — 682,068 Equity, mutual funds, and other — (19 ) — (19 ) Total trading securities—fixed income — 1,446,644 — 1,446,644 Trading securities—mortgage banking — — 1,524 1,524 Loans held-for-sale (elected fair value) — — 16,273 16,273 Securities available-for-sale: U.S. treasuries — 98 — 98 Government agency issued MBS — 2,420,106 — 2,420,106 Government agency issued CMO — 1,958,695 — 1,958,695 Other U.S. government agencies — 149,786 — 149,786 States and municipalities — 32,573 — 32,573 Corporate and other debt — 55,310 — 55,310 Interest-only strips (elected fair value) — — 9,902 9,902 Total securities available-for-sale — 4,616,568 9,902 4,626,470 Other assets: Deferred compensation mutual funds 37,771 — — 37,771 Equity, mutual funds, and other 22,248 — — 22,248 Derivatives, forwards and futures 28,826 — — 28,826 Derivatives, interest rate contracts — 52,214 — 52,214 Derivatives, other — 435 — 435 Total other assets 88,845 52,649 — 141,494 Total assets $ 88,845 $ 6,115,861 $ 27,699 $ 6,232,405 Trading liabilities—fixed income: U.S. treasuries $ — $ 207,739 $ — $ 207,739 Other U.S. government agencies — 98 — 98 Corporates and other debt — 127,543 — 127,543 Total trading liabilities—fixed income — 335,380 — 335,380 Other liabilities: Derivatives, forwards and futures 30,236 — — 30,236 Derivatives, interest rate contracts — 71,853 — 71,853 Derivatives, other — 84 31,540 31,624 Total other liabilities 30,236 71,937 31,540 133,713 Total liabilities $ 30,236 $ 407,317 $ 31,540 $ 469,093
Summary of Changes in Level 3 Assets Measured At Fair Value	Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the years ended December 31, 2019 , 2018 and 2017 on a recurring basis are summarized as follows: Year Ended December 31, 2019 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2019 $ 1,524 $ 9,902 $ 16,273 $ (31,540 ) Total net gains/(losses) included in: Net income (285 ) (4,725 ) 1,828 (3,946 ) Purchases — 86 10 — Sales — (47,469 ) — — Settlements (298 ) — (4,078 ) 12,691 Net transfers into/(out of) Level 3 — 61,342 (b) — (d) — Balance on December 31, 2019 $ 941 $ 19,136 $ 14,033 $ (22,795 ) Net unrealized gains/(losses) included in net income $ (66 ) (a) $ (1,984 ) (c) $ 1,828 (a) $ (3,946 ) (e) Year Ended December 31, 2018 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2018 $ 2,151 $ 1,270 $ 18,926 $ (5,645 ) Total net gains/(losses) included in: Net income 173 (398 ) 1,239 (4,677 ) Purchases — — 62 (28,100 ) (f) Sales — (16,840 ) — — Settlements (800 ) — (3,598 ) 6,882 Net transfers into/(out of) Level 3 — 25,870 (b) (356 ) (d) — Balance on December 31, 2018 $ 1,524 $ 9,902 $ 16,273 $ (31,540 ) Net unrealized gains/(losses) included in net income $ 6 (a) $ (1,025 ) (c) $ 1,239 (a) $ (4,677 ) (e) Year Ended December 31, 2017 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2017 $ 2,573 $ — $ 21,924 $ (6,245 ) Total net gains/(losses) included in: Net income 448 1,021 1,547 (596 ) Purchases — 1,413 168 — Sales (5 ) (11,431 ) — — Settlements (865 ) — (4,346 ) 1,196 Net transfers into/(out of) Level 3 — 10,267 (b) (367 ) (d) — Balance on December 31, 2017 $ 2,151 $ 1,270 $ 18,926 $ (5,645 ) Net unrealized gains/(losses) included in net income $ 303 (a) $ (171 ) (c) $ 1,547 (a) $ (596 ) (e) (a) Primarily included in mortgage banking income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held-for-sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Transfers out of loans held-for-sale level 3 measured on a recurring basis generally reflect movements into OREO (level 3 nonrecurring). (e) Included in Other expense. (f) Increase related to Visa-related derivatives, see Note 22-Derivatives.
Summary of Changes in Level 3 Net Derivative Asset (Liability) Measured at Fair Value	Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the years ended December 31, 2019 , 2018 and 2017 on a recurring basis are summarized as follows: Year Ended December 31, 2019 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2019 $ 1,524 $ 9,902 $ 16,273 $ (31,540 ) Total net gains/(losses) included in: Net income (285 ) (4,725 ) 1,828 (3,946 ) Purchases — 86 10 — Sales — (47,469 ) — — Settlements (298 ) — (4,078 ) 12,691 Net transfers into/(out of) Level 3 — 61,342 (b) — (d) — Balance on December 31, 2019 $ 941 $ 19,136 $ 14,033 $ (22,795 ) Net unrealized gains/(losses) included in net income $ (66 ) (a) $ (1,984 ) (c) $ 1,828 (a) $ (3,946 ) (e) Year Ended December 31, 2018 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2018 $ 2,151 $ 1,270 $ 18,926 $ (5,645 ) Total net gains/(losses) included in: Net income 173 (398 ) 1,239 (4,677 ) Purchases — — 62 (28,100 ) (f) Sales — (16,840 ) — — Settlements (800 ) — (3,598 ) 6,882 Net transfers into/(out of) Level 3 — 25,870 (b) (356 ) (d) — Balance on December 31, 2018 $ 1,524 $ 9,902 $ 16,273 $ (31,540 ) Net unrealized gains/(losses) included in net income $ 6 (a) $ (1,025 ) (c) $ 1,239 (a) $ (4,677 ) (e) Year Ended December 31, 2017 (Dollars in thousands) Trading securities Interest-only strips- AFS Loans held- for-sale Net derivative liabilities Balance on January 1, 2017 $ 2,573 $ — $ 21,924 $ (6,245 ) Total net gains/(losses) included in: Net income 448 1,021 1,547 (596 ) Purchases — 1,413 168 — Sales (5 ) (11,431 ) — — Settlements (865 ) — (4,346 ) 1,196 Net transfers into/(out of) Level 3 — 10,267 (b) (367 ) (d) — Balance on December 31, 2017 $ 2,151 $ 1,270 $ 18,926 $ (5,645 ) Net unrealized gains/(losses) included in net income $ 303 (a) $ (171 ) (c) $ 1,547 (a) $ (596 ) (e) (a) Primarily included in mortgage banking income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held-for-sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Transfers out of loans held-for-sale level 3 measured on a recurring basis generally reflect movements into OREO (level 3 nonrecurring). (e) Included in Other expense. (f) Increase related to Visa-related derivatives, see Note 22-Derivatives.
Nonrecurring Fair Value Measurements	For assets measured at fair value on a nonrecurring basis which were still held on the balance sheet at December 31, 2019 , 2018 and 2017 , respectively, the following tables provide the level of valuation assumptions used to determine each adjustment, the related carrying value, and the fair value adjustments recorded during the respective periods. Carrying value at December 31, 2019 Year Ended December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Net gains/(losses) Loans held-for-sale—SBAs and USDA $ — $ 492,595 $ 929 $ 493,524 $ (1,817 ) Loans held-for-sale—first mortgages — — 516 516 32 Loans, net of unearned income (a) — — 42,208 42,208 (7,341 ) OREO (b) — — 15,660 15,660 (927 ) Other assets (c) — — 10,608 10,608 (1,809 ) $ (11,862 ) Carrying value at December 31, 2018 Year Ended December 31, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Net gains/(losses) Loans held-for-sale—other consumer $ — $ 18,712 $ — $ 18,712 $ (1,809 ) Loans held-for-sale—SBAs and USDA — 577,280 1,011 578,291 (2,541 ) Loans held-for-sale—first mortgages — — 541 541 13 Loans, net of unearned income (a) — — 48,259 48,259 (841 ) OREO (b) — — 22,387 22,387 (2,599 ) Other assets (c) — — 8,845 8,845 (4,712 ) $ (12,489 ) Carrying value at December 31, 2017 Year Ended December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total Net gains/(losses) Loans held-for-sale—SBAs and USDA $ — $ 465,504 $ 1,473 $ 466,977 $ (1,629 ) Loans held-for-sale—first mortgages — — 618 618 36 Loans, net of unearned income (a) — — 26,666 26,666 (1,687 ) OREO (b) — — 39,566 39,566 (996 ) Other assets (c) — — 26,521 26,521 (3,468 ) $ (7,744 ) (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method.
Schedule of Unobservable Inputs Utilized In Determining The Fair Value of Level 3 Recurring And Non-Recurring Measurements	The following tables provide information regarding the unobservable inputs utilized in determining the fair value of level 3 recurring and non-recurring measurements as of December 31, 2019 and 2018 : (Dollars in thousands) Values Utilized Level 3 Class Fair Value at Valuation Techniques Unobservable Input Range Weighted Average (d) Available-for-sale- securities SBA-interest only strips $ 19,136 Discounted cash flow Constant prepayment rate 12% 12% Bond equivalent yield 16% - 17% 16% Loans held-for-sale - residential real estate 14,549 Discounted cash flow Prepayment speeds - First mortgage 3% - 14% 4.1% Prepayment speeds - HELOC 0% - 12% 7.6% Foreclosure losses 50% - 66% 64% Loss severity trends - First mortgage 3% - 24% of UPB 14.3% Loss severity trends - HELOC 0% - 72% of UPB 50% Loans held-for-sale- unguaranteed interest in SBA loans 929 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 9% 9% Derivative liabilities, other 22,795 Discounted cash flow Visa covered litigation resolution amount $5.4 billion - $6.0 billion $5.8 billion Probability of resolution scenarios 10% - 50% 16% Time until resolution 15 - 39 months 29 months Loans, net of unearned 42,208 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 15,660 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 10,608 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value (Dollars in thousands) Values Utilized Level 3 Class Fair Value at Valuation Techniques Unobservable Input Range Weighted Average (d) Available-for-sale- securities SBA-interest only strips $ 9,902 Discounted cash flow Constant prepayment rate 11% - 12% 11% Bond equivalent yield 14% - 15% 14% Loans held-for-sale - residential real estate 16,815 Discounted cash flow Prepayment speeds - First mortgage 2% - 10% 3% Prepayment speeds - HELOC 5% - 12% 7.5% Foreclosure losses 50% - 66% 63% Loss severity trends - First mortgage 2% - 25% of UPB 17% Loss severity trends - HELOC 50% - 100% of UPB 50% Loans held-for-sale- unguaranteed interest in SBA loans 1,011 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 9% 9% Derivative liabilities, other 31,540 Discounted cash flow Visa covered litigation resolution amount $5.0 billion - $5.8 billion $5.6 billion Probability of resolution scenarios 10% - 25% 23% Time until resolution 18 - 48 months 36 months Loans, net of unearned 48,259 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 22,387 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 8,845 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value
Summary of Differences Between The Fair Value Carrying Amount of Mortgages Held-For-Sale and Aggregate Unpaid Principal Amount	The following tables reflect the differences between the fair value carrying amount of residential real estate loans held-for-sale measured at fair value in accordance with management’s election and the aggregate unpaid principal amount FHN is contractually entitled to receive at maturity. December 31, 2019 (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Fair value carrying amount less aggregate unpaid principal Residential real estate loans held-for-sale reported at fair value: Total loans $ 14,033 $ 19,278 $ (5,245 ) Nonaccrual loans 3,532 6,646 (3,114 ) Loans 90 days or more past due and still accruing 163 268 (105 ) December 31, 2018 (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Fair value carrying amount less aggregate unpaid principal Residential real estate loans held-for-sale reported at fair value: Total loans $ 16,273 $ 23,567 $ (7,294 ) Nonaccrual loans 4,536 8,128 (3,592 ) Loans 90 days or more past due and still accruing 171 281 (110 )
Changes In Fair Value of Assets and Liabilities Which Fair Value Option Included In Current Period Earnings	Assets and liabilities accounted for under the fair value election are initially measured at fair value with subsequent changes in fair value recognized in earnings. Such changes in the fair value of assets and liabilities for which FHN elected the fair value option are included in current period earnings with classification in the income statement line item reflected in the following table: Year Ended December 31 (Dollars in thousands) 2019 2018 2017 Changes in fair value included in net income: Mortgage banking noninterest income Loans held-for-sale $ 1,828 $ 1,239 $ 1,547
Summary Of Book Value And Estimated Fair Value Of Financial Instruments	The following tables summarize the book value and estimated fair value of financial instruments recorded in the Consolidated Statements of Condition as of December 31, 2019 and December 31, 2018: December 31, 2019 Book Value Fair Value (Dollars in thousands) Level 1 Level 2 Level 3 Total Assets: Loans, net of unearned income and allowance for loan losses Commercial: Commercial, financial and industrial $ 19,928,605 $ — $ — $ 20,096,397 $ 20,096,397 Commercial real estate 4,300,905 — — 4,300,489 4,300,489 Consumer: Consumer real estate 5,987,125 — — 6,153,016 6,153,016 Permanent mortgage 161,571 — — 181,171 181,171 Credit card & other 482,598 — — 487,079 487,079 Total loans, net of unearned income and allowance for loan losses 30,860,804 — — 31,218,152 31,218,152 Short-term financial assets: Interest-bearing cash 482,405 482,405 — — 482,405 Federal funds sold 46,536 — 46,536 — 46,536 Securities purchased under agreements to resell 586,629 — 586,629 — 586,629 Total short-term financial assets 1,115,570 482,405 633,165 — 1,115,570 Trading securities (a) 1,346,207 — 1,345,266 941 1,346,207 Loans held-for-sale Mortgage loans (elected fair value) (a) 14,033 — — 14,033 14,033 USDA & SBA loans- LOCOM 493,525 — 495,323 947 496,270 Other consumer loans- LOCOM 5,197 — 5,197 — 5,197 Mortgage loans- LOCOM 81,035 — — 81,035 81,035 Total loans held-for-sale 593,790 — 500,520 96,015 596,535 Securities available-for-sale (a) 4,445,403 — 4,426,267 19,136 4,445,403 Securities held-to-maturity 10,000 — — 10,001 10,001 Derivative assets (a) 183,115 20,640 162,475 — 183,115 Other assets: Tax credit investments 247,075 — — 244,755 244,755 Deferred compensation mutual funds 46,815 46,815 — — 46,815 Equity, mutual funds, and other (b) 229,352 22,643 — 206,709 229,352 Total other assets 523,242 69,458 — 451,464 520,922 Total assets $ 39,078,131 $ 572,503 $ 7,067,693 $ 31,795,709 $ 39,435,905 Liabilities: Defined maturity deposits $ 3,618,337 $ — $ 3,631,090 $ — $ 3,631,090 Trading liabilities (a) 505,581 — 505,581 — 505,581 Short-term financial liabilities: Federal funds purchased 548,344 — 548,344 — 548,344 Securities sold under agreements to repurchase 716,925 — 716,925 — 716,925 Other short-term borrowings 2,253,045 — 2,253,045 — 2,253,045 Total short-term financial liabilities 3,518,314 — 3,518,314 — 3,518,314 Term borrowings: Real estate investment trust-preferred 46,236 — — 47,000 47,000 Secured borrowings 21,975 — — 21,975 21,975 Junior subordinated debentures 144,593 — — 142,375 142,375 Other long term borrowings 578,564 — 574,287 — 574,287 Total term borrowings 791,368 — 574,287 211,350 785,637 Derivative liabilities (a) 67,480 19,807 24,878 22,795 67,480 Total liabilities $ 8,501,080 $ 19,807 $ 8,254,150 $ 234,145 $ 8,508,102 (a) Classes are detailed in the recurring and nonrecurring measurement tables. (b) Level 1 primarily consists of mutual funds with readily determinable fair value. Level 3 includes restricted investments in FHLB-Cincinnati stock of $76.0 million and FRB stock of $130.7 million . December 31, 2018 Book Value Fair Value (Dollars in thousands) Level 1 Level 2 Level 3 Total Assets: Loans, net of unearned income and allowance for loan losses Commercial: Commercial, financial and industrial $ 16,415,381 $ — $ — $ 16,438,272 $ 16,438,272 Commercial real estate 3,999,559 — — 3,997,736 3,997,736 Consumer: Consumer real estate 6,223,077 — — 6,194,066 6,194,066 Permanent mortgage 211,448 — — 227,254 227,254 Credit card & other 505,643 — — 507,001 507,001 Total loans, net of unearned income and allowance for loan losses 27,355,108 — — 27,364,329 27,364,329 Short-term financial assets: Interest-bearing cash 1,277,611 1,277,611 — — 1,277,611 Federal funds sold 237,591 — 237,591 — 237,591 Securities purchased under agreements to resell 386,443 — 386,443 — 386,443 Total short-term financial assets 1,901,645 1,277,611 624,034 — 1,901,645 Trading securities (a) 1,448,168 — 1,446,644 1,524 1,448,168 Loans held-for-sale: Mortgage loans (elected fair value) (a) 16,273 — — 16,273 16,273 USDA & SBA loans- LOCOM 578,291 — 582,476 1,015 583,491 Other consumer loans- LOCOM 25,134 — 6,422 18,712 25,134 Mortgage loans- LOCOM 59,451 — — 59,451 59,451 Total loans held-for-sale 679,149 — 588,898 95,451 684,349 Securities available-for-sale (a) 4,626,470 — 4,616,568 9,902 4,626,470 Securities held-to-maturity 10,000 — — 9,843 9,843 Derivative assets (a) 81,475 28,826 52,649 — 81,475 Other assets: Tax credit investments 163,300 — — 159,452 159,452 Deferred compensation mutual funds 37,771 37,771 — — 37,771 Equity, mutual funds, and other (b) 240,780 22,248 — 218,532 240,780 Total other assets 441,851 60,019 — 377,984 438,003 Total assets 36,543,866 1,366,456 7,328,793 27,859,033 36,554,282 Liabilities: Defined maturity deposits $ 4,105,777 $ — $ 4,082,822 $ — $ 4,082,822 Trading liabilities (a) 335,380 — 335,380 — 335,380 Short-term financial liabilities: Federal funds purchased $ 256,567 $ — $ 256,567 $ — $ 256,567 Securities sold under agreements to repurchase 762,592 — 762,592 — 762,592 Other short-term borrowings 114,764 — 114,764 — 114,764 Total short-term financial liabilities 1,133,923 — 1,133,923 — 1,133,923 Term borrowings: Real estate investment trust-preferred 46,168 — — 47,000 47,000 Term borrowings—new market tax credit investment 2,699 — — 2,664 2,664 Secured borrowings 19,588 — — 19,588 19,588 Junior subordinated debentures 143,255 — — 134,266 134,266 Other long term borrowings 959,253 — 960,483 — 960,483 Total term borrowings 1,170,963 — 960,483 203,518 1,164,001 Derivative liabilities (a) 133,713 30,236 71,937 31,540 133,713 Total liabilities 6,879,756 30,236 6,584,545 235,058 6,849,839 (a) Classes are detailed in the recurring and nonrecurring measurement tables. (b) Level 1 primarity consists of mutual funds with readily determinable fair value. Level 3 includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $130.7 million . Contractual Amount Fair Value (Dollars in thousands) December 31, 2019 December 31, 2018 December 31, 2019 December 31, 2018 Unfunded Commitments: Loan commitments $ 12,355,220 $ 10,884,975 $ 3,656 $ 2,551 Standby and other commitments 459,268 446,958 5,513 5,043

Restructuring, Repositioning,_2

Restructuring, Repositioning, and Efficiency (Tables)	12 Months Ended
	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring Expense Recognized	Total expense recognized for the year ended December 31, 2019 is presented in the table below: Dollars in thousands Year Ended December 31, 2019 Employee compensation, incentives and benefits $ 10,503 Professional fees 16,014 Occupancy 818 Other 12,484 Total restructuring and repositioning charges $ 39,819

Parent Company Financial Info_2

Parent Company Financial Information (Tables)	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Statements of Condition	Following are statements of the parent company: Statements of Condition December 31 (Dollars in thousands) 2019 2018 Assets: Cash $ 369,268 $ 334,485 Notes receivable 2,716 2,888 Allowance for loan losses — (925 ) Investments in subsidiaries: Bank 5,038,909 4,741,105 Non-bank 17,892 20,281 Other assets 171,121 180,757 Total assets $ 5,599,906 $ 5,278,591 Liabilities and equity: Accrued employee benefits and other liabilities $ 177,080 $ 158,648 Term borrowings 642,249 629,994 Total liabilities 819,329 788,642 Total equity 4,780,577 4,489,949 Total liabilities and equity $ 5,599,906 $ 5,278,591
Statements of Income	Statements of Income Year Ended December 31 (Dollars in thousands) 2019 2018 2017 Dividend income: Bank $ 345,000 $ 420,000 $ 250,000 Non-bank 756 1,386 1,097 Total dividend income 345,756 421,386 251,097 Interest income 76 29 — Other income/(loss) 965 83 190 Total income 346,797 421,498 251,287 Provision/(provision credit) for loan losses (925 ) — — Interest expense: Term borrowings 31,224 31,315 17,936 Total interest expense 31,224 31,315 17,936 Compensation, employee benefits and other expense 52,447 53,401 43,783 Total expense 82,746 84,716 61,719 Income/(loss) before income taxes 264,051 336,782 189,568 Income tax(benefit)/expense (19,285 ) (38,509 ) 512 Income/(loss) before equity in undistributed net income of subsidiaries 283,336 375,291 189,056 Equity in undistributed net income/(loss) of subsidiaries: Bank 160,257 170,939 (24,255 ) Non-bank (2,685 ) (1,188 ) 714 Net income/(loss) attributable to the controlling interest $ 440,908 $ 545,042 $ 165,515 Certain previously reported amounts have been reclassified to agree with current presentation.
Statements of Cash Flows	Statements of Cash Flows Year Ended December 31 (Dollars in thousands) 2019 2018 2017 Operating activities: Net income/(loss) $ 440,908 $ 545,042 $ 165,515 Less undistributed net income/(loss) of subsidiaries 157,572 169,751 (23,541 ) Income/(loss) before undistributed net income of subsidiaries 283,336 375,291 189,056 Adjustments to reconcile income to net cash provided by operating activities: Depreciation, amortization, and other (915 ) 15 15 (Gain)/loss on securities (317 ) (28 ) (109 ) Provision for deferred income taxes 3,648 3,212 7,727 Stock-based compensation expense 21,909 22,398 19,625 Net (increase)/decrease in interest receivable and other assets 10,170 18,214 8,605 Net (decrease)/increase in interest payable and other liabilities 17,736 (10,702 ) 13,172 Total adjustments 52,231 33,109 49,035 Net cash provided/(used) by operating activities 335,567 408,400 238,091 Investing activities: Securities: Sales and prepayments 1,457 65 318 Premises and equipment: Sales/(purchases) 19 (43 ) 7 Return on investment in subsidiary 164 1,597 1,871 Cash paid for business combination, net — (39,916 ) (126,149 ) Net cash provided/(used) by investing activities 1,640 (38,297 ) (123,953 ) Financing activities: Preferred stock: Cash dividends (6,200 ) (6,200 ) (6,200 ) Common stock: Exercise of stock options 9,665 4,482 6,132 Cash dividends (171,076 ) (138,706 ) (79,904 ) Repurchase of shares (134,813 ) (104,768 ) (5,554 ) Term borrowings: Repayment of term borrowings — (45,364 ) — Net cash (used)/provided by financing activities (302,424 ) (290,556 ) (85,526 ) Net increase/(decrease) in cash and cash equivalents 34,783 79,547 28,612 Cash and cash equivalents at beginning of year 334,485 254,938 226,326 Cash and cash equivalents at end of year $ 369,268 $ 334,485 $ 254,938 Total interest paid $ 29,169 $ 29,186 $ 17,321 Income taxes received from subsidiaries 43,418 49,056 23,020

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Jan. 01, 2019	Dec. 31, 2018		Dec. 31, 2017
Change in Accounting Estimate [Line Items]
Performance obligation, description of timing		one year or less
Mortgage loans secured by residential real estate in process of foreclosure	[1]	$ 17,838			$ 25,290
Lease right-of use assets		203,910
Lease liabilities		225,836
Loans, net of unearned income		31,061,111	[2]		27,535,532	[2]	$ 27,658,929
Undivided profits		$ 1,798,442			1,542,408
Deposit Bases
Change in Accounting Estimate [Line Items]
Intangible assets, amortization period		10 years
Minimum | Furniture and Fixtures
Change in Accounting Estimate [Line Items]
Useful life of premises and equipment		3 years
Minimum | Building
Change in Accounting Estimate [Line Items]
Useful life of premises and equipment		7 years
Maximum | Furniture and Fixtures
Change in Accounting Estimate [Line Items]
Useful life of premises and equipment		15 years
Maximum | Building
Change in Accounting Estimate [Line Items]
Useful life of premises and equipment		45 years
Non-Accruing | Minimum
Change in Accounting Estimate [Line Items]
Impaired commercial loans		$ 1,000
Accounting Standards Update 2016-02
Change in Accounting Estimate [Line Items]
Adjustment to reflect adoption of accounting standard					$ (1,011)
Lease right-of use assets				$ 185,000
Lease liabilities				204,000
Loans, net of unearned income				3,450
Undivided profits				$ 1,011
Government Guaranteed Mortgage Loans upon Foreclosure Receivable
Change in Accounting Estimate [Line Items]
Mortgage loans secured by residential real estate in process of foreclosure		2,200
Non-Interest income
Change in Accounting Estimate [Line Items]
Accounts receivable, net		$ 8,700
[1]	December 31, 2019 and 2018 include $9.2 million and $9.7 million , respectively, of foreclosed residential real estate.
[2]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - ASU 2016-02 (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Jan. 01, 2019	Dec. 31, 2018		Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans, net of unearned income	$ 31,061,111	[1]		$ 27,535,532	[1]	$ 27,658,929
Premises and equipment, net	455,006			494,041
Other assets	2,046,338			1,802,939
Other liabilities	873,079			580,335
Undivided profits	$ 1,798,442			$ 1,542,408
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans, net of unearned income			$ 3,450
Premises and equipment, net			2,718
Other assets			183,884
Other liabilities			(191,010)
Undivided profits			$ 1,011
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - ASU 2016-13 (Details) $ in Millions	Jan. 01, 2020USD ($)	Dec. 31, 2019	Dec. 31, 2018
First Horizon National Corporation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Regulatory capital ratio CET1		9.20%	9.77%
Forecast | Subsequent Event | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings, net of tax	$ 100
Forecast | First Horizon National Corporation | Subsequent Event | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Coverage ratio on total loans	0.0100
Regulatory capital ratio CET1	0.07%

Acquisitions and Divestitures -

Acquisitions and Divestitures - Narrative (Details) $ in Thousands

Nov. 08, 2019USD ($)branch

Nov. 04, 2019officestatedirectors

Mar. 23, 2018USD ($)branch

Nov. 30, 2017USD ($)branchshares

Apr. 03, 2017USD ($)

Jun. 30, 2018USD ($)shares

Jun. 30, 2018USD ($)

Dec. 31, 2019USD ($)

Dec. 31, 2018USD ($)

Dec. 31, 2017USD ($)

Dec. 31, 2016USD ($)

Apr. 30, 2019USD ($)

Business Acquisition [Line Items]

Assets

$ 43,310,900

$ 40,832,258

Loans

30,860,804

27,355,108

Deposits

32,429,535

32,682,992

Goodwill

1,432,787

1,432,787

$ 1,386,853

$ 191,371

Goodwill expected to be tax deductible

$ 17,000

Noninterest expense

1,210,187

1,220,317

842,314

IBERIABANK Corporation

Business Acquisition [Line Items]

Conversion price of shares

4.584

Conversion percentage of shares

44.00%

Number of board of directors | directors

17

SunTrust Banks, Inc. Branches

Business Acquisition [Line Items]

Number of bank branches | branch

30

Deposits

$ 2,400,000

Deposits premium percent

3.40%

Loans

$ 410,000

Capital Bank Financial Corporation

Business Acquisition [Line Items]

Number of bank branches | branch

178

Deposits

$ 8,140,102

Loans

$ 7,276,544

Equity interest issued, number of shares (in shares) | shares

92,042,232

Payments to acquire business

$ 423,600

$ 46,000

$ 469,615

Total consideration paid

2,216,333

Number of shares canceled (in shares) | shares

2,373,220

Assets acquired

9,833,737

Securities available-for-sale

1,193,393

Goodwill

$ 1,192,839

Acquired finite-lived intangible assets, weighted average useful life

10 years

Coastal Securities, Inc

Business Acquisition [Line Items]

Payments to acquire business

$ 131,473

Assets acquired

418,418

Goodwill

$ 44,964

IBERIABANK DIRECTORS

Business Acquisition [Line Items]

Number of board of directors | directors

8

FHN DIRECTORS | IBERIABANK Corporation

Business Acquisition [Line Items]

Number of board of directors | directors

9

Apex Bank

Business Acquisition [Line Items]

Number of branches divested | branch

2

Savings classified as held for sale

$ 30,000

Loans disposed of

$ 2,000

Portion of Sub-prime Auto Loan Portfolios

Business Acquisition [Line Items]

Loans disposed of

$ 120,000

$ 120,000

$ 120,000

Discontinued Operations, Held-for-sale | Subprime Consumer Loans

Business Acquisition [Line Items]

Loans disposed of

$ 25,000

Amortization Of Premiums And Accretion Of Discounts | Capital Bank Financial Corporation

Business Acquisition [Line Items]

Noninterest expense

34,500

46,500

Eliminate Amortization Of Premiums And Accretion Of Discounts | Capital Bank Financial Corporation

Business Acquisition [Line Items]

Noninterest expense

24,400

25,900

Amortization Of Acquired Intangibles | Capital Bank Financial Corporation

Business Acquisition [Line Items]

Noninterest expense

$ 15,800

$ 18,000

IBERIABANK Corporation

Business Acquisition [Line Items]

Number of offices | office

319

Number of states | state

12

Assets

31,700,000

Loans

24,000,000

Deposits

$ 25,200,000

NORTH CAROLINA | SunTrust Banks, Inc. Branches

Business Acquisition [Line Items]

Number of bank branches | branch

20

VIRGINIA | SunTrust Banks, Inc. Branches

Business Acquisition [Line Items]

Number of bank branches | branch

8

GEORGIA | SunTrust Banks, Inc. Branches

Business Acquisition [Line Items]

Number of bank branches | branch

2

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Purchase Price Allocation (Details) - USD ($) $ in Thousands		Nov. 30, 2017	Apr. 03, 2017	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill, Acquired During Period						$ 0		$ 45,934		$ 1,195,482
Assets:
Cash and due from banks						633,728		781,291
Interest-bearing cash						482,405		1,277,611
Trading securities						1,346,207		1,448,168
Loans held-for-sale	[1]					593,790		679,149
Securities held-to-maturity (Note 3)						10,000		10,000
Loans, net of unearned income						31,061,111	[2]	27,535,532	[2]	27,658,929
Allowance for loan losses						(200,307)		(180,424)		(189,555)	$ (202,068)
Goodwill						1,432,787		1,432,787		1,386,853	191,371
Other intangible assets						130,200		155,034
Premises and equipment, net						455,006		494,041
Other real estate owned (OREO)	[3]					17,838		25,290
Other assets						2,046,338		1,802,939
Total assets						43,310,900		40,832,258
Liabilities:
Deposits						32,429,535		32,682,992
Securities sold under agreements to repurchase						716,925		762,592
Other short-term borrowings						2,253,045		114,764
Fixed income payables						49,535		9,572
Term borrowings (Note 10)						791,368		1,170,963
Other liabilities						873,079		580,335
Total liabilities						38,234,892		36,046,878
Consideration paid:
Goodwill						$ 1,432,787		1,432,787		1,386,853	$ 191,371
Capital Bank Financial Corporation
Business Acquisition [Line Items]
Goodwill, Acquired During Period		$ 0
Assets:
Goodwill		1,192,839
Assets As Recorded:
Cash and cash equivalents		205,999
Trading securities		0
Loans held-for-sale		122,969
Securities available-for-sale		1,193,393
Securities held-to-maturity		0
Loans		7,276,544
Allowance for loan losses		0
Other intangible assets		141,207
Premises and equipment		223,882
OREO		33,613
Other assets		636,130
Total assets acquired		9,833,737
Liabilities As Recorded:
Deposits		8,140,102
Securities sold under agreements to repurchase		26,664
Other short-term borrowings		390,391
Term borrowings		187,169
Other liabilities		65,917
Total liabilities assumed		8,810,243
Net assets acquired		1,023,494
Consideration paid:
Equity		(1,746,718)
Cash		(423,600)		$ (46,000)	$ (469,615)
Total consideration paid		(2,216,333)
Goodwill		1,192,839
Capital Bank Financial Corporation | Purchase Accounting/Fair Value Adjustments
Assets:
Cash and due from banks								0		0
Trading securities								0		(4,758)
Loans held-for-sale								(11,034)		134,003
Securities available-for-sale								0		175,526
Securities held-to-maturity (Note 3)								0		(177,549)
Loans, net of unearned income								867		(320,372)
Allowance for loan losses								0		45,711
Goodwill								0		(231,292)
Other intangible assets								(2,593)		119,302
Premises and equipment, net								(9,470)		37,054
Other real estate owned (OREO)								(315)		(9,149)
Other assets								(22,422)		41,320
Total assets								(44,967)		(190,204)
Liabilities:
Deposits								(642)		(849)
Securities sold under agreements to repurchase								0		0
Other short-term borrowings								0		0
Term borrowings (Note 10)								0		67,683
Other liabilities								1,631		4,291
Total liabilities								989		71,125
Net assets acquired								(45,956)		(261,329)
Consideration paid:
Goodwill								$ 0		$ (231,292)
Coastal Securities, Inc
Assets:
Goodwill			$ 44,964
Assets As Recorded:
Cash and cash equivalents			7,502
Interest-bearing cash			4,132
Trading securities			139,082
Loans held-for-sale			236,088
Investment securities			1,413
Other intangible assets			27,300
Premises and equipment			1,229
Other assets			1,672
Total assets acquired			418,418
Liabilities As Recorded:
Securities sold under agreements to repurchase			201,595
Other short-term borrowings			33,509
Fixed income payables			96,489
Other liabilities			316
Total liabilities assumed			331,909
Net assets acquired			86,509
Consideration paid:
Cash			(131,473)
Goodwill			44,964
Coastal Securities, Inc | Purchase Accounting/Fair Value Adjustments
Assets:
Cash and due from banks			0
Interest-bearing cash			0
Trading securities			(284,580)
Loans held-for-sale			236,088
Investment securities			1,413
Other intangible assets			27,300
Premises and equipment, net			0
Other assets			14
Total assets			(19,765)
Liabilities:
Securities sold under agreements to repurchase			0
Other short-term borrowings			0
Fixed income payables			(47,158)
Other liabilities			(642)
Total liabilities			(47,800)
Net assets acquired			28,035
Capital Bank Financial Corporation
Assets:
Cash and due from banks		205,999
Trading securities		4,758
Loans held-for-sale		0
Securities available-for-sale		1,017,867
Securities held-to-maturity (Note 3)		177,549
Loans, net of unearned income		7,596,049
Allowance for loan losses		(45,711)
Goodwill		231,292
Other intangible assets		24,498
Premises and equipment, net		196,298
Other real estate owned (OREO)		43,077
Other assets		617,232
Total assets		10,068,908
Liabilities:
Deposits		8,141,593
Securities sold under agreements to repurchase		26,664
Other short-term borrowings		390,391
Term borrowings (Note 10)		119,486
Other liabilities		59,995
Total liabilities		8,738,129
Net assets acquired		1,330,779
Consideration paid:
Goodwill		$ 231,292
Coastal Securities, Inc
Assets:
Cash and due from banks			7,502
Interest-bearing cash			4,132
Trading securities			423,662
Loans held-for-sale			0
Investment securities			0
Other intangible assets			0
Premises and equipment, net			1,229
Other assets			1,658
Total assets			438,183
Liabilities:
Securities sold under agreements to repurchase			201,595
Other short-term borrowings			33,509
Fixed income payables			143,647
Other liabilities			958
Total liabilities			379,709
Net assets acquired			$ 58,474
[1]	December 31, 2019 and 2018 include $6.8 million and $8.4 million , respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.
[2]	December 31, 2019 and 2018 include $18.8 million and $28.6 million
[3]	December 31, 2019 and 2018 include $9.2 million and $9.7 million , respectively, of foreclosed residential real estate.

Acquisitions and Divestitures_3

Acquisitions and Divestitures - Merger and Integration Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
IBERIABANK Corporation
Business Acquisition [Line Items]
Merger and integration expense	$ 11,371
IBERIABANK Corporation | Professional fees
Business Acquisition [Line Items]
Merger and integration expense	8,228
IBERIABANK Corporation | Employee compensation, incentives and benefits
Business Acquisition [Line Items]
Merger and integration expense	3,079
IBERIABANK Corporation | Miscellaneous expense
Business Acquisition [Line Items]
Merger and integration expense	64
Capital Bank Financial Corporation
Business Acquisition [Line Items]
Merger and integration expense	22,870	$ 92,393	$ 56,748
Capital Bank Financial Corporation | Professional fees
Business Acquisition [Line Items]
Merger and integration expense	11,221	22,337	28,151
Capital Bank Financial Corporation | Employee compensation, incentives and benefits
Business Acquisition [Line Items]
Merger and integration expense	1,189	9,613	17,077
Capital Bank Financial Corporation | Contract employment and outsourcing
Business Acquisition [Line Items]
Merger and integration expense	240	3,681	1,270
Capital Bank Financial Corporation | Occupancy
Business Acquisition [Line Items]
Merger and integration expense	1,453	5,236	15
Capital Bank Financial Corporation | Miscellaneous expense
Business Acquisition [Line Items]
Merger and integration expense	2,072	7,652	1,291
Capital Bank Financial Corporation | All other expense
Business Acquisition [Line Items]
Merger and integration expense	$ 6,695	$ 43,874	$ 8,944

Acquisitions and Divestitures_4

Acquisitions and Divestitures - Pro Forma (Details) - Capital Bank Financial Corporation - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Actual from acquisition date, net interest income	$ 31,253
Actual from acquisition date, noninterest income	6,192
Actual from acquisition date, pre-tax income	$ 16,534
Unaudited pro forma, net interest income		$ 1,165,006	$ 1,033,218
Unaudited pro forma, noninterest income		563,581	638,493
Unaudited pro forma, pre-tax income		476,911	458,667
Unaudited pro forma, net income available to common shareholders		$ 274,416	$ 293,981

Investment Securities - Schedul

Investment Securities - Schedule Of FHN's Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt securities, available-for-sale:
Securities available for sale, amortized cost	$ 4,385,003
Securities available for sale, fair value	4,445,403	$ 4,626,470
Securities pledged and sold	3,800,000	3,800,000
Securities held-to-maturity:
Amortized Cost	10,000	10,000
Securities held to maturity, gross unrealized gains	1	0
Securities held to maturity, gross unrealized losses	0	(157)
Securities held to maturity, fair value	10,001	9,843
U.S. treasuries
Debt securities, available-for-sale:
Securities available for sale, amortized cost	100	100
Securities available for sale, unrealized gains	0	0
Securities available for sale, unrealized losses	0	(2)
Securities available for sale, fair value	100	98
Government agency issued mortgage-backed securities (“MBS”)
Debt securities, available-for-sale:
Securities available for sale, amortized cost	2,316,381	2,473,687
Securities available for sale, unrealized gains	34,692	4,819
Securities available for sale, unrealized losses	(2,556)	(58,400)
Securities available for sale, fair value	2,348,517	2,420,106
Government agency issued collateralized mortgage obligations (“CMO”)
Debt securities, available-for-sale:
Securities available for sale, amortized cost	1,667,773	2,006,488
Securities available for sale, unrealized gains	9,916	888
Securities available for sale, unrealized losses	(7,197)	(48,681)
Securities available for sale, fair value	1,670,492	1,958,695
Other U.S. government agencies
Debt securities, available-for-sale:
Securities available for sale, amortized cost	303,463	149,050
Securities available for sale, unrealized gains	3,750	809
Securities available for sale, unrealized losses	(1,121)	(73)
Securities available for sale, fair value	306,092	149,786
Corporates and other debt
Debt securities, available-for-sale:
Securities available for sale, amortized cost	40,054	55,383
Securities available for sale, unrealized gains	486	388
Securities available for sale, unrealized losses	0	(461)
Securities available for sale, fair value	40,540	55,310
State and municipalities
Debt securities, available-for-sale:
Securities available for sale, amortized cost	57,232	32,473
Securities available for sale, unrealized gains	3,324	314
Securities available for sale, unrealized losses	(30)	(214)
Securities available for sale, fair value	60,526	32,573
Available-for-sale securities, excluding interest only strips
Debt securities, available-for-sale:
Securities available for sale, amortized cost	4,385,003	4,717,181
Securities available for sale, unrealized gains	52,168	7,218
Securities available for sale, unrealized losses	(10,904)	(107,831)
Securities available for sale, fair value	4,426,267	4,616,568
Interest-Only Strip (elected fair value)
Debt securities, available-for-sale:
Securities available for sale, fair value	19,136	9,902
Corporates and other debt
Securities held-to-maturity:
Amortized Cost	10,000	10,000
Securities held to maturity, gross unrealized gains	1	0
Securities held to maturity, gross unrealized losses	0	(157)
Securities held to maturity, fair value	$ 10,001	$ 9,843

Investment Securities - Sched_2

Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Held-to-maturity, Amortized Cost [Abstract]
Within 1 year	$ 0
After 1 year; within 5 years	0
After 5 years; within 10 years	10,000
After 10 years	0
Subtotal	10,000
Government agency issued MBS and CMO	0
Amortized Cost	10,000	$ 10,000
Held-to-maturity, Fair Value [Abstract]
Within 1 year	0
After 1 year; within 5 years	0
After 5 years; within 10 years	10,001
After 10 years	0
Subtotal	10,001
Government agency issued MBS and CMO	0
Fair Value	10,001	9,843
Available-for-sale, Amortized Cost [Abstract]
Within 1 year	35,022
After 1 year; within 5 years	209,003
After 5 years; within 10 years	755
After 10 years	156,069
Subtotal, Amortized Cost	400,849
Government agency issued MBS and CMO	3,984,154
Securities available for sale, amortized cost	4,385,003
Available-for-sale, Fair Value [Abstract]
Within 1 year	35,211
After 1 year; within 5 years	213,108
After 5 years; within 10 years	3,332
After 10 years	174,743
Subtotal, Fair Value	426,394
Government agency issued MBS and CMO	4,019,009
Securities available for sale, fair value	$ 4,445,403	$ 4,626,470

Investment Securities - Sched_3

Investment Securities - Schedule Of Realized Gross Gains And Losses On Sale From Available For Sale Portfolio (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Marketable Securities [Abstract]
Gross gains on sales of securities	$ 0	$ 52,000	$ 2,514,000
Gross (losses) on sales of securities	(267,000)	0	(1,922,000)
Net gain/(loss) on sales of securities	(267,000)	52,000	592,000
Proceeds from sales	$ 191,700,000	$ 0	937,000,000
Gain associated with call of held-to-maturity securities			400,000
Held-to-maturity security called			$ 4,400,000

Investment Securities - Sched_4

Investment Securities - Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Unrealized Losses
Fair value, less than 12 months	$ 655,820	$ 960,053
Unrealized losses, less than 12 months	(3,616)	(15,826)
Fair value, 12 months or longer	553,979	3,112,632
Unrealized loss, 12 months or longer	(7,288)	(92,005)
Fair value, total	1,209,799	4,072,685
Unrealized losses, total	(10,904)	(107,831)
U.S. treasuries
Unrealized Losses
Fair value, less than 12 months	0	0
Unrealized losses, less than 12 months	0	0
Fair value, 12 months or longer	100	98
Unrealized loss, 12 months or longer	0	(2)
Fair value, total	100	98
Unrealized losses, total	0	(2)
Government agency issued mortgage-backed securities (“MBS”)
Unrealized Losses
Fair value, less than 12 months	174,983	597,008
Unrealized losses, less than 12 months	(495)	(12,335)
Fair value, 12 months or longer	192,755	1,537,106
Unrealized loss, 12 months or longer	(2,061)	(46,065)
Fair value, total	367,738	2,134,114
Unrealized losses, total	(2,556)	(58,400)
Government agency issued collateralized mortgage obligations (“CMO”)
Unrealized Losses
Fair value, less than 12 months	378,815	290,863
Unrealized losses, less than 12 months	(1,970)	(2,860)
Fair value, 12 months or longer	361,124	1,560,420
Unrealized loss, 12 months or longer	(5,227)	(45,821)
Fair value, total	739,939	1,851,283
Unrealized losses, total	(7,197)	(48,681)
Other U.S. government agencies
Unrealized Losses
Fair value, less than 12 months	98,471	29,776
Unrealized losses, less than 12 months	(1,121)	(73)
Fair value, 12 months or longer	0	0
Unrealized loss, 12 months or longer	0	0
Fair value, total	98,471	29,776
Unrealized losses, total	(1,121)	(73)
Corporates and other debt
Unrealized Losses
Fair value, less than 12 months		25,114
Unrealized losses, less than 12 months		(344)
Fair value, 12 months or longer		15,008
Unrealized loss, 12 months or longer		(117)
Fair value, total		40,122
Unrealized losses, total		(461)
State and municipalities
Unrealized Losses
Fair value, less than 12 months	3,551	17,292
Unrealized losses, less than 12 months	(30)	(214)
Fair value, 12 months or longer	0	0
Unrealized loss, 12 months or longer	0	0
Fair value, total	3,551	17,292
Unrealized losses, total	$ (30)	$ (214)

Investment Securities - Narrati

Investment Securities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Carrying amount of equity method investments without readily determinable fair value	$ 25.6	$ 21.3
Unrealized gain (loss) for equity investments with readily determinable fair value	$ 7	(1.5)
Visa Class B Shares
Debt Securities, Available-for-sale [Line Items]
Gain on sale of investments		$ 212.9

Loans - Schedule Of Loans By Po

Loans - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Sep. 30, 2019	Dec. 31, 2018		Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 31,061,111	[1]		$ 27,535,532	[1]		$ 27,658,929
Allowance for loan losses	200,307			180,424			189,555	$ 202,068
Total net loans	30,860,804			27,355,108
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	158,598			130,258
Commercial | Commercial, financial, and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	20,051,091			16,514,328			16,057,273
Allowance for loan losses	122,486			98,947			98,211	89,398
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,337,017			4,030,870			4,214,695
Allowance for loan losses	36,112			31,311			28,427	33,852
Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,006,749			6,249,516			6,479,242
Allowance for loan losses	19,624			26,439			39,823	51,424
Consumer | Permanent mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	170,390			222,448			287,820
Allowance for loan losses	8,819			11,000			13,113	15,222
Consumer | Credit card & other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	495,864			518,370			619,899
Allowance for loan losses	$ 13,266			12,727			$ 9,981	$ 12,172
Consumer | Restricted And Secured Consumer Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income				$ 16,200
Restatement Adjustment | Commercial | Commercial, financial, and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income			$ (410,000)			$ (410,000)
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Loans - Concentrations, Restric

Loans - Concentrations, Restrictions, and Acquisition (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Nov. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	[1]	$ 593,790	$ 679,149
Consumer | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage		20.00%
Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage		19.00%
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans		$ 24,388,108	$ 20,545,198
Loans pledged to secure potential borrowings		5,200,000
Commercial | Finance And Insurance Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans		$ 2,800,000
Percentage of commercial & industrial loan portfolio		14.00%
Percentage contributed in total loan		9.00%
Commercial | Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans		$ 4,400,000
Percentage of commercial & industrial loan portfolio		22.00%
Percentage contributed in total loan		14.00%
Commercial | Finance Insurance and Loans to Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of commercial & industrial loan portfolio		36.00%
Capital Bank Financial Corporation | PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale				$ 4,700
[1]	December 31, 2019 and 2018 include $6.8 million and $8.4 million , respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.

Loans - Certain Loans Acquired

Loans - Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Movement Schedule Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 13,375	$ 15,623
Accretion	(5,792)	(9,467)
Adjustment for payoffs	(2,438)	(3,896)
Adjustment for charge-offs	(479)	(1,115)
Adjustment for pool excess recovery	0	(123)
Increase in accretable yield	5,513	12,791
Disposals	(4)	(240)
Other	(367)	(198)
Balance, end of period	$ 9,808	$ 13,375

Loans - Schedule Of Acquired Pu

Loans - Schedule Of Acquired Purchase Credit Impaired Loans By Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	$ 1,965	$ 4,037	$ 3,168
Provision for loan losses	47,000	7,000	0
Carrying value	54,221	86,420
Unpaid balance	58,216	98,190
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	848	2,823
PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	2,000	4,000
Net charge-off	5,800	6,700
Provision for loan losses	1,300	4,800
Commercial, financial, and industrial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	848	2,823	2,809
Provision for loan losses	50,573	12,027	21,902
Carrying value	24,973	38,873
Unpaid balance	25,938	44,259
Commercial real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	0	0	4
Provision for loan losses	5,493	3,328	(6,196)
Carrying value	5,078	15,197
Unpaid balance	5,466	17,232
Consumer real estate | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	1,086	1,087	355
Provision for loan losses	(16,034)	(23,693)	(21,168)
Carrying value	23,681	30,723
Unpaid balance	26,245	34,820
Credit card & other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	31	127	0
Provision for loan losses	11,904	18,395	$ 7,901
Carrying value	489	1,627
Unpaid balance	$ 567	$ 1,879

Loans - Information By Class Re

Loans - Information By Class Related To Individually Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Recorded Investment
Recorded Investment	$ 246,900	$ 240,533
Unpaid Principal Balance
Unpaid Principal Balance	281,089	269,468
Related Allowance	25,916	28,814
Average Recorded Investment
Average Recorded Investment	270,043	246,386
Interest Income Recognized
Interest Income Recognized	5,787	6,419
Commercial
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	54,235	44,491
Impaired loans with related allowance recorded, Recorded investment	29,766	6,067
Recorded Investment	84,001	50,558
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	65,165	46,976
Impaired loans with related allowance recorded, Unpaid principal balance	31,536	6,879
Unpaid Principal Balance	96,701	53,855
Related Allowance	6,196	1,074
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	72,316	25,994
Impaired loans with related allowance recorded, Average recorded investment	16,994	19,439
Average Recorded Investment	89,310	45,433
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	723	808
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	13	10
Interest Income Recognized	736	818
Consumer
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	12,533	16,560
Impaired loans with related allowance recorded, Recorded investment	150,366	173,415
Recorded Investment	162,899	189,975
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	20,492	27,447
Impaired loans with related allowance recorded, Unpaid principal balance	163,896	188,166
Unpaid Principal Balance	184,388	215,613
Related Allowance	19,720	27,740
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	14,934	17,415
Impaired loans with related allowance recorded, Average recorded investment	165,799	183,538
Average Recorded Investment	180,733	200,953
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	5,051	5,601
Interest Income Recognized	5,051	5,601
Commercial, financial, and industrial | Commercial | General C&I
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	52,672	42,902
Impaired loans with related allowance recorded, Recorded investment	29,766	2,802
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	63,602	45,387
Impaired loans with related allowance recorded, Unpaid principal balance	31,536	2,802
Related Allowance	6,196	149
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	61,382	24,186
Impaired loans with related allowance recorded, Average recorded investment	14,328	16,011
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	690	757
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	4	0
Commercial, financial, and industrial | Commercial | Loans to mortgage companies
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	0
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	0
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	9,314
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0
Commercial, financial, and industrial | Commercial | TRUPs
Recorded Investment
Impaired loans with related allowance recorded, Recorded investment	0	2,888
Unpaid Principal Balance
Impaired loans with related allowance recorded, Unpaid principal balance	0	3,700
Related Allowance	0	925
Average Recorded Investment
Impaired loans with related allowance recorded, Average recorded investment	2,445	2,981
Interest Income Recognized
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	0	0
Commercial real estate | Commercial | Income CRE
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	1,563	1,589
Impaired loans with related allowance recorded, Recorded investment	0	377
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	1,563	1,589
Impaired loans with related allowance recorded, Unpaid principal balance	0	377
Related Allowance	0	0
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	1,620	1,434
Impaired loans with related allowance recorded, Average recorded investment	221	348
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	33	51
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	9	10
Commercial real estate | Commercial | Residential C R E
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment		0
Impaired loans with related allowance recorded, Recorded investment		0
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance		0
Impaired loans with related allowance recorded, Unpaid principal balance		0
Related Allowance		0
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment		374
Impaired loans with related allowance recorded, Average recorded investment		99
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized		0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized		0
Consumer real estate | Consumer | Home Equity Line of Credit
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	4,940	8,645
Impaired loans with related allowance recorded, Recorded investment	55,522	66,482
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	10,438	16,648
Impaired loans with related allowance recorded, Unpaid principal balance	59,122	69,610
Related Allowance	7,016	11,241
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	6,582	8,723
Impaired loans with related allowance recorded, Average recorded investment	61,294	69,535
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	1,868	2,273
Consumer real estate | Consumer | R/E installment loans
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	5,329	4,314
Impaired loans with related allowance recorded, Recorded investment	34,862	38,993
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	6,105	4,796
Impaired loans with related allowance recorded, Unpaid principal balance	35,780	39,851
Related Allowance	4,521	6,743
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	5,335	4,300
Impaired loans with related allowance recorded, Average recorded investment	40,181	40,118
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	1,016	1,024
Permanent Mortgage | Consumer
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment	2,264	3,601
Impaired loans with related allowance recorded, Recorded investment	59,329	67,245
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance	3,949	6,003
Impaired loans with related allowance recorded, Unpaid principal balance	68,341	78,010
Related Allowance	7,761	9,419
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	3,017	4,392
Impaired loans with related allowance recorded, Average recorded investment	63,630	73,259
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	2,149	2,290
Credit card & other | Consumer
Recorded Investment
Impaired loans with related allowance recorded, Recorded investment	653	695
Unpaid Principal Balance
Impaired loans with related allowance recorded, Unpaid principal balance	653	695
Related Allowance	422	337
Average Recorded Investment
Impaired loans with related allowance recorded, Average recorded investment	694	626
Interest Income Recognized
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	$ 18	$ 14

Loans - Asset Quality Indicator

Loans - Asset Quality Indicators (Details)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
PD Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lowest expected default probability	1
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	14
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	15
Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 24,388,108,000	$ 20,545,198,000
Commercial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13
Minimum | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1
Minimum | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13
Minimum | Loan Reassessed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 1,000,000
Minimum | PD Grade 13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 500,000
Minimum | LGD Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1
Minimum | Commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1
Maximum | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	12
Maximum | Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16
Maximum | LGD Grade 12
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	12
Maximum | Commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16

Loans - Balances Of Commercial

Loans - Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	$ 200,307	$ 180,424	$ 189,555		$ 202,068
Total loans collectively evaluated for impairment	30,758,025	27,204,542	27,219,667
Total loans individually evaluated for impairment	246,900	240,533	259,713
Purchased credit-impaired loans	56,186	90,457	179,549
Allowance - collectively evaluated for impairment	172,426	147,573	144,620
Allowance - individually evaluated for impairment	25,916	28,814	41,767
Allowance - purchased credit-impaired loans	1,965	4,037	3,168
Gain on sale of TRUPs loans	$ 1,105	$ 3,777	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of total commercial loans (percent)	100.00%	100.00%
Loans and Leases Receivable, Allowance	$ 158,598	$ 130,258
Total loans collectively evaluated for impairment	24,273,207	20,437,747
Total loans individually evaluated for impairment	84,001	50,558
Purchased credit-impaired loans	30,900	56,893
Total commercial loans	$ 24,388,108	$ 20,545,198
Percent of loan collectively evaluated for impairment (percent)	100.00%	100.00%
Percent of loan individually evaluated for impairment (percent)	0.00%	0.00%
Percent of loan purchased-credit impaired (percent)	0.00%	0.00%
Allowance - collectively evaluated for impairment	$ 151,554	$ 126,361
Allowance - individually evaluated for impairment	6,196	1,074
Allowance - purchased credit-impaired loans	848	2,823
Commercial Loan P D Grade One | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 697,888	$ 622,763
Percent of total commercial loans (percent)	3.00%	3.00%
Loans and Leases Receivable, Allowance	$ 69	$ 100
Commercial Loan P D Grade Two | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 815,992	$ 837,493
Percent of total commercial loans (percent)	4.00%	4.00%
Loans and Leases Receivable, Allowance	$ 165	$ 274
Commercial Loan P D Grade Three | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 2,098,520	$ 1,789,074
Percent of total commercial loans (percent)	9.00%	9.00%
Loans and Leases Receivable, Allowance	$ 274	$ 315
Commercial Loan P D Grade Four | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 2,657,818	$ 2,224,417
Percent of total commercial loans (percent)	11.00%	11.00%
Loans and Leases Receivable, Allowance	$ 738	$ 686
Commercial Loan P D Grade Five | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 3,725,003	$ 3,088,258
Percent of total commercial loans (percent)	15.00%	15.00%
Loans and Leases Receivable, Allowance	$ 8,265	$ 8,919
Commercial Loan P D Grade Six | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 4,683,029	$ 2,824,473
Percent of total commercial loans (percent)	19.00%	14.00%
Loans and Leases Receivable, Allowance	$ 12,054	$ 8,141
Commercial Loan P D Grade Seven | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 3,908,971	$ 3,363,877
Percent of total commercial loans (percent)	16.00%	16.00%
Loans and Leases Receivable, Allowance	$ 20,409	$ 16,906
Commercial Loan P D Grade Eight | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 2,166,241	$ 1,676,558
Percent of total commercial loans (percent)	9.00%	8.00%
Loans and Leases Receivable, Allowance	$ 22,514	$ 18,545
Commercial Loan P D Grade Nine | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 1,393,514	$ 2,099,294
Percent of total commercial loans (percent)	6.00%	10.00%
Loans and Leases Receivable, Allowance	$ 17,484	$ 15,454
Commercial Loan P D Grade Ten | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 665,145	$ 587,305
Percent of total commercial loans (percent)	3.00%	3.00%
Loans and Leases Receivable, Allowance	$ 10,197	$ 8,675
Commercial Loan P D Grade Eleven | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 579,124	$ 379,741
Percent of total commercial loans (percent)	2.00%	2.00%
Loans and Leases Receivable, Allowance	$ 13,454	$ 7,973
Commercial Loan P D Grade Twelve | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 307,945	$ 342,537
Percent of total commercial loans (percent)	1.00%	2.00%
Loans and Leases Receivable, Allowance	$ 8,471	$ 6,972
Commercial Loan P D Grade Thirteen | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 266,915	$ 347,432
Percent of total commercial loans (percent)	1.00%	2.00%
Loans and Leases Receivable, Allowance	$ 8,142	$ 10,094
Commercial Loan P D Grade Fourteen Fifteen Sixteen | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 307,102	$ 254,525
Percent of total commercial loans (percent)	1.00%	1.00%
Loans and Leases Receivable, Allowance	$ 29,318	$ 23,307
C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	122,486	98,947	98,211		89,398
Total loans collectively evaluated for impairment	19,942,728	16,424,006	15,909,110
Total loans individually evaluated for impairment	82,438	48,592	43,024
Purchased credit-impaired loans	25,925	41,730	105,139
Allowance - collectively evaluated for impairment	115,442	95,050	89,358
Allowance - individually evaluated for impairment	6,196	1,074	6,044
Allowance - purchased credit-impaired loans	848	2,823	2,809
C&I | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	15,313,558	14,152,795
Total loans individually evaluated for impairment	82,438	45,704
Purchased credit-impaired loans	25,925	41,730
Total commercial loans	15,421,921	14,240,229
C&I | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	4,410,883	2,023,746
Total loans individually evaluated for impairment	0	0
Purchased credit-impaired loans	0	0
Total commercial loans	4,410,883	2,023,746
C&I | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	218,287	247,465
Total loans individually evaluated for impairment	0	2,888
Purchased credit-impaired loans	0	0
Total commercial loans	218,287	250,353
Valuation allowance	19,100	20,200
Gain on sale of TRUPs loans		3,800
Financing receivable, sold		3,000		$ 55,500
Financing receivable sold, allowance		300		$ 5,000
C&I | Commercial Loan P D Grade One | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	696,040	610,177
C&I | Commercial Loan P D Grade One | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade One | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Two | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	767,048	835,776
C&I | Commercial Loan P D Grade Two | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Two | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Three | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	743,123	782,362
C&I | Commercial Loan P D Grade Three | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	877,210	716,971
C&I | Commercial Loan P D Grade Three | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	3,314	0
C&I | Commercial Loan P D Grade Four | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,237,772	1,223,092
C&I | Commercial Loan P D Grade Four | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	692,971	394,862
C&I | Commercial Loan P D Grade Four | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	46,375	43,220
C&I | Commercial Loan P D Grade Five | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,986,761	1,920,034
C&I | Commercial Loan P D Grade Five | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	670,402	277,814
C&I | Commercial Loan P D Grade Five | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	72,512	77,751
C&I | Commercial Loan P D Grade Six | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	2,511,290	1,722,136
C&I | Commercial Loan P D Grade Six | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,410,387	365,341
C&I | Commercial Loan P D Grade Six | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	27,263	45,609
C&I | Commercial Loan P D Grade Seven | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	2,708,707	2,690,784
C&I | Commercial Loan P D Grade Seven | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	509,616	96,603
C&I | Commercial Loan P D Grade Seven | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	18,378	11,446
C&I | Commercial Loan P D Grade Eight | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,743,364	1,337,113
C&I | Commercial Loan P D Grade Eight | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	136,771	53,224
C&I | Commercial Loan P D Grade Eight | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Nine | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,101,873	1,472,852
C&I | Commercial Loan P D Grade Nine | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	77,139	96,292
C&I | Commercial Loan P D Grade Nine | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	31,909	45,117
C&I | Commercial Loan P D Grade Ten | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	563,635	490,795
C&I | Commercial Loan P D Grade Ten | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	21,229	13,260
C&I | Commercial Loan P D Grade Ten | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	18,536	18,536
C&I | Commercial Loan P D Grade Eleven | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	495,140	311,967
C&I | Commercial Loan P D Grade Eleven | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Eleven | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Twelve | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	262,906	244,867
C&I | Commercial Loan P D Grade Twelve | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	15,158	9,379
C&I | Commercial Loan P D Grade Twelve | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Thirteen | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	232,823	285,987
C&I | Commercial Loan P D Grade Thirteen | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Thirteen | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	5,786
C&I | Commercial Loan P D Grade Fourteen Fifteen Sixteen | General C&I | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	263,076	224,853
C&I | Commercial Loan P D Grade Fourteen Fifteen Sixteen | Loans to Mortgage Companies | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
C&I | Commercial Loan P D Grade Fourteen Fifteen Sixteen | TRUPs | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
Commercial real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	36,112	31,311	28,427		$ 33,852
Total loans collectively evaluated for impairment	4,330,479	4,013,741	4,181,908
Total loans individually evaluated for impairment	1,563	1,966	2,407
Purchased credit-impaired loans	4,975	15,163	30,380
Allowance - collectively evaluated for impairment	36,112	31,311	28,291
Allowance - individually evaluated for impairment	0	0	132
Allowance - purchased credit-impaired loans	0	0	$ 4
Commercial real estate | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	4,242,519	3,877,848
Total loans individually evaluated for impairment	1,563	1,966
Purchased credit-impaired loans	4,155	12,730
Total commercial loans	4,248,237	3,892,544
Commercial real estate | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	87,960	135,893
Total loans individually evaluated for impairment	0	0
Purchased credit-impaired loans	820	2,433
Total commercial loans	88,780	138,326
Commercial real estate | Commercial Loan P D Grade One | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,848	12,586
Commercial real estate | Commercial Loan P D Grade One | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	0	0
Commercial real estate | Commercial Loan P D Grade Two | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	48,906	1,688
Commercial real estate | Commercial Loan P D Grade Two | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	38	29
Commercial real estate | Commercial Loan P D Grade Three | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	474,067	289,594
Commercial real estate | Commercial Loan P D Grade Three | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	806	147
Commercial real estate | Commercial Loan P D Grade Four | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	680,223	563,243
Commercial real estate | Commercial Loan P D Grade Four | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	477	0
Commercial real estate | Commercial Loan P D Grade Five | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	993,628	798,509
Commercial real estate | Commercial Loan P D Grade Five | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,700	14,150
Commercial real estate | Commercial Loan P D Grade Six | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	717,062	657,628
Commercial real estate | Commercial Loan P D Grade Six | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	17,027	33,759
Commercial real estate | Commercial Loan P D Grade Seven | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	641,345	538,909
Commercial real estate | Commercial Loan P D Grade Seven | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	30,925	26,135
Commercial real estate | Commercial Loan P D Grade Eight | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	269,407	265,901
Commercial real estate | Commercial Loan P D Grade Eight | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	16,699	20,320
Commercial real estate | Commercial Loan P D Grade Nine | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	169,586	455,184
Commercial real estate | Commercial Loan P D Grade Nine | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	13,007	29,849
Commercial real estate | Commercial Loan P D Grade Ten | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	59,592	60,803
Commercial real estate | Commercial Loan P D Grade Ten | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	2,153	3,911
Commercial real estate | Commercial Loan P D Grade Eleven | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	81,682	66,986
Commercial real estate | Commercial Loan P D Grade Eleven | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	2,302	788
Commercial real estate | Commercial Loan P D Grade Twelve | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	28,807	82,574
Commercial real estate | Commercial Loan P D Grade Twelve | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,074	5,717
Commercial real estate | Commercial Loan P D Grade Thirteen | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	32,966	55,408
Commercial real estate | Commercial Loan P D Grade Thirteen | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	1,126	251
Commercial real estate | Commercial Loan P D Grade Fourteen Fifteen Sixteen | Income CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	43,400	28,835
Commercial real estate | Commercial Loan P D Grade Fourteen Fifteen Sixteen | Residential C R E | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, Disaggregated by PD grade	$ 626	$ 837

Loans - Loans by FICO Score, Co

Loans - Loans by FICO Score, Consumer (Details) - Consumer	Dec. 31, 2019	Dec. 31, 2018
HELOC | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	62.00%	61.40%
HELOC | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.60%	8.50%
HELOC | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	7.60%	7.60%
HELOC | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	10.80%	10.90%
HELOC | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	4.70%	5.10%
HELOC | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	6.30%	6.50%
HELOC | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	100.00%	100.00%
R/E installment loans | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	72.90%	71.30%
R/E installment loans | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.30%	8.80%
R/E installment loans | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	6.10%	7.00%
R/E installment loans | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	7.70%	7.60%
R/E installment loans | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	2.60%	2.80%
R/E installment loans | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	2.40%	2.50%
R/E installment loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	100.00%	100.00%
Permanent mortgage | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	44.80%	51.80%
Permanent mortgage | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	9.70%	7.60%
Permanent mortgage | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	12.30%	10.60%
Permanent mortgage | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	16.30%	14.70%
Permanent mortgage | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	9.70%	6.50%
Permanent mortgage | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	7.20%	8.80%
Permanent mortgage | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	100.00%	100.00%

Loans - Accruing And Non-Accrui

Loans - Accruing And Non-Accruing Loans By Class (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	$ 31,061,111	[1]	$ 27,535,532	[1]	$ 27,658,929
Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	30,841,035		27,312,619
Total Accruing	30,898,946		27,387,783
Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	36,052		42,703
Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	21,859		32,461
Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	100,382		101,879
Total Non-Accruing	162,165		147,749
Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	20,217		11,831
Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	41,566		34,039
Commercial | Commercial, financial, and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	20,051,091		16,514,328		16,057,273
Commercial | Commercial, financial, and industrial | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	19,967,302		16,463,919
Total Accruing	19,976,779		16,474,552
Commercial | Commercial, financial, and industrial | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	7,442		8,858
Commercial | Commercial, financial, and industrial | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,035		1,775
Commercial | Commercial, financial, and industrial | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	36,564		26,325
Total Non-Accruing	74,312		39,776
Commercial | Commercial, financial, and industrial | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	14,385		5,537
Commercial | Commercial, financial, and industrial | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	23,363		7,914
Commercial | Commercial, financial, and industrial | General C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	15,395,996		14,198,499
Commercial | Commercial, financial, and industrial | General C&I | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,314,292		14,153,275
Total Accruing	15,321,684		14,161,611
Commercial | Commercial, financial, and industrial | General C&I | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	7,155		8,234
Commercial | Commercial, financial, and industrial | General C&I | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	237		102
Commercial | Commercial, financial, and industrial | General C&I | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	36,564		26,325
Total Non-Accruing	74,312		36,888
Commercial | Commercial, financial, and industrial | General C&I | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	14,385		5,537
Commercial | Commercial, financial, and industrial | General C&I | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	23,363		5,026
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,410,883		2,023,746
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,410,883		2,023,746
Total Accruing	4,410,883		2,023,746
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		0
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | Loans to Mortgage Companies | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | TRUPs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	218,287		250,353
Valuation allowance	19,100		20,200
Commercial | Commercial, financial, and industrial | TRUPs | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	218,287		247,465
Total Accruing	218,287		247,465
Commercial | Commercial, financial, and industrial | TRUPs | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | TRUPs | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | TRUPs | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		2,888
Commercial | Commercial, financial, and industrial | TRUPs | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | TRUPs | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		2,888
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	25,925		41,730
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	23,840		39,433
Total Accruing	25,925		41,730
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	287		624
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,798		1,673
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		0
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial, financial, and industrial | C&I Purchase Credit Impaired Loans | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,337,017		4,030,870		4,214,695
Commercial | Commercial real estate | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,334,283		4,025,398
Total Accruing	4,335,192		4,027,879
Commercial | Commercial real estate | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	814		729
Commercial | Commercial real estate | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	95		1,752
Commercial | Commercial real estate | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		62
Total Non-Accruing	1,825		2,991
Commercial | Commercial real estate | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	485		0
Commercial | Commercial real estate | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,340		2,929
Commercial | Commercial real estate | Income CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,244,082		3,879,814
Commercial | Commercial real estate | Income CRE | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,242,044		3,876,229
Total Accruing	4,242,723		3,876,855
Commercial | Commercial real estate | Income CRE | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	679		626
Commercial | Commercial real estate | Income CRE | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial real estate | Income CRE | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		30
Total Non-Accruing	1,359		2,959
Commercial | Commercial real estate | Income CRE | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	19		0
Commercial | Commercial real estate | Income CRE | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,340		2,929
Commercial | Commercial real estate | Residential C R E
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	87,960		135,893
Commercial | Commercial real estate | Residential C R E | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	87,487		135,861
Total Accruing	87,494		135,861
Commercial | Commercial real estate | Residential C R E | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	7		0
Commercial | Commercial real estate | Residential C R E | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial real estate | Residential C R E | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		32
Total Non-Accruing	466		32
Commercial | Commercial real estate | Residential C R E | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	466		0
Commercial | Commercial real estate | Residential C R E | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,975		15,163
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,752		13,308
Total Accruing	4,975		15,163
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	128		103
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	95		1,752
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		0
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	6,006,749		6,249,516		6,479,242
Consumer | Consumer real estate | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	5,898,847		6,120,405
Total Accruing	5,935,436		6,166,868
Consumer | Consumer real estate | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	22,506		24,217
Consumer | Consumer real estate | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	14,083		22,246
Consumer | Consumer real estate | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	56,008		64,155
Total Non-Accruing	71,313		82,648
Consumer | Consumer real estate | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	5,232		5,238
Consumer | Consumer real estate | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	10,073		13,255
Consumer | Consumer real estate | Home Equity Line of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	1,286,875		1,526,537
Consumer | Consumer real estate | Home Equity Line of Credit | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,217,344		1,443,651
Total Accruing	1,232,169		1,465,433
Consumer | Consumer real estate | Home Equity Line of Credit | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	9,156		11,653
Consumer | Consumer real estate | Home Equity Line of Credit | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	5,669		10,129
Consumer | Consumer real estate | Home Equity Line of Credit | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	43,007		49,009
Total Non-Accruing	54,706		61,104
Consumer | Consumer real estate | Home Equity Line of Credit | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	4,227		3,314
Consumer | Consumer real estate | Home Equity Line of Credit | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	7,472		8,781
Consumer | Consumer real estate | R/E installment loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,695,108		4,691,169
Consumer | Consumer real estate | R/E installment loans | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,662,783		4,652,658
Total Accruing	4,678,501		4,669,625
Consumer | Consumer real estate | R/E installment loans | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	10,580		10,470
Consumer | Consumer real estate | R/E installment loans | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	5,138		6,497
Consumer | Consumer real estate | R/E installment loans | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	13,001		15,146
Total Non-Accruing	16,607		21,544
Consumer | Consumer real estate | R/E installment loans | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,005		1,924
Consumer | Consumer real estate | R/E installment loans | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,601		4,474
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	24,766		31,810
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	18,720		24,096
Total Accruing	24,766		31,810
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,770		2,094
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	3,276		5,620
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		0
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Consumer | Consumer real estate | RE Installment Purchase Credit Impaired Loans | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Consumer | Permanent Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	170,390		222,448		287,820
Consumer | Permanent Mortgage | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	149,663		193,591
Total Accruing	156,009		200,738
Consumer | Permanent Mortgage | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,314		2,585
Consumer | Permanent Mortgage | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	4,032		4,562
Consumer | Permanent Mortgage | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	7,709		11,227
Total Non-Accruing	14,381		21,710
Consumer | Permanent Mortgage | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	71		996
Consumer | Permanent Mortgage | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	6,601		9,487
Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	495,864		518,370		$ 619,899
Consumer | Credit Card and Other | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	490,940		509,306
Total Accruing	495,530		517,746
Consumer | Credit Card and Other | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,976		6,314
Consumer | Credit Card and Other | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,614		2,126
Consumer | Credit Card and Other | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	101		110
Total Non-Accruing	334		624
Consumer | Credit Card and Other | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	44		60
Consumer | Credit Card and Other | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	189		454
Consumer | Credit Card and Other | Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	201,171		191,345
Consumer | Credit Card and Other | Credit Card | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	198,917		188,009
Total Accruing	201,171		191,345
Consumer | Credit Card and Other | Credit Card | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,076		2,133
Consumer | Credit Card and Other | Credit Card | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,178		1,203
Consumer | Credit Card and Other | Credit Card | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		0
Consumer | Credit Card and Other | Credit Card | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Consumer | Credit Card and Other | Credit Card | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Consumer | Credit Card and Other | Other Consumer Loans Class
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	294,173		325,271
Consumer | Credit Card and Other | Other Consumer Loans Class | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	291,700		320,551
Total Accruing	293,839		324,647
Consumer | Credit Card and Other | Other Consumer Loans Class | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,802		3,570
Consumer | Credit Card and Other | Other Consumer Loans Class | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	337		526
Consumer | Credit Card and Other | Other Consumer Loans Class | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	101		110
Total Non-Accruing	334		624
Consumer | Credit Card and Other | Other Consumer Loans Class | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	44		60
Consumer | Credit Card and Other | Other Consumer Loans Class | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	189		454
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	520		1,754
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	323		746
Total Accruing	520		1,754
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	98		611
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	99		397
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non-Accruing	0		0
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | Non-Accruing | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 0		$ 0
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructuring Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings loans	$ 206.3	$ 228.2
Allowance For TDRs To Recorded Investment Of TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan loss reserves	$ 19.7	$ 27.7
Ratio of the allowance for loan losses to loans	10.00%	12.00%
Loans Held For Sale, Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings loans	$ 51.1	$ 57.8
Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRS maturities	30 years
Consumer | Permanent Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR, reduction of interest rate by increment, basis points	0.25%
Modified interest rate increase	1.00%
TDRS maturities	40 years
Minimum | Consumer | Permanent Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate	2.00%
Modified interest rate time period	5 years
Minimum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forbearance agreements time period	6 months
Maximum | Consumer | Permanent Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate time period	5 years
Maximum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forbearance agreements time period	12 months
Heloc And Real Estate Installment Classes | Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR, reduction of interest rate by increment, basis points	0.25%
Modified interest rate increase	2.00%
Heloc And Real Estate Installment Classes | Minimum | Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate	1.00%
Modified interest rate time period	5 years
Heloc And Real Estate Installment Classes | Maximum | Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate time period	5 years
Credit Card | Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit card workout program, granted rate reduction	0.00%
Credit Card | Minimum | Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payment reductions, time period	6 months
Credit Card | Maximum | Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payment reductions, time period	1 year
Credit card workout program, term extension	5 years

Loans - Schedule Of Troubled De

Loans - Schedule Of Troubled Debt Restructurings Occurring During The Year (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	267	348
Pre-Modification Outstanding Recorded Investment	$ 34,765	$ 47,370
Post-Modification Outstanding Recorded Investment	$ 34,648	$ 46,712
Commercial | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	4	9
Pre-Modification Outstanding Recorded Investment	$ 14,179	$ 27,639
Post-Modification Outstanding Recorded Investment	$ 14,101	$ 27,190
Commercial | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	0	4
Pre-Modification Outstanding Recorded Investment	$ 0	$ 643
Post-Modification Outstanding Recorded Investment	$ 0	$ 637
Consumer | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	170	195
Pre-Modification Outstanding Recorded Investment	$ 18,436	$ 17,483
Post-Modification Outstanding Recorded Investment	$ 18,391	$ 17,131
Consumer | Permanent Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	8	8
Pre-Modification Outstanding Recorded Investment	$ 1,771	$ 1,001
Post-Modification Outstanding Recorded Investment	$ 1,798	$ 1,184
Consumer | Credit card & other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	85	132
Pre-Modification Outstanding Recorded Investment	$ 379	$ 604
Post-Modification Outstanding Recorded Investment	$ 358	$ 570
General C&I | Commercial | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	4	9
Pre-Modification Outstanding Recorded Investment	$ 14,179	$ 27,639
Post-Modification Outstanding Recorded Investment	$ 14,101	$ 27,190
Income CRE | Commercial | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	0	4
Pre-Modification Outstanding Recorded Investment	$ 0	$ 643
Post-Modification Outstanding Recorded Investment	$ 0	$ 637
Home Equity Line of Credit | Consumer | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	74	103
Pre-Modification Outstanding Recorded Investment	$ 8,028	$ 9,406
Post-Modification Outstanding Recorded Investment	$ 7,946	$ 9,283
R/E installment loans | Consumer | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	96	92
Pre-Modification Outstanding Recorded Investment	$ 10,408	$ 8,077
Post-Modification Outstanding Recorded Investment	$ 10,445	$ 7,848

Loans - Schedule Of Troubled _2

Loans - Schedule Of Troubled Debt Restructurings Within The Previous 12 Months (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	43	65
Recorded Investment | $	$ 1,361	$ 1,952
Commercial | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	0	2
Recorded Investment | $	$ 0	$ 579
Consumer | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	10	8
Recorded Investment | $	$ 1,239	$ 385
Consumer | Permanent mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	1	6
Recorded Investment | $	$ 7	$ 749
Consumer | Credit card & other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	32	49
Recorded Investment | $	$ 115	$ 239
General C&I | Commercial | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	0	2
Recorded Investment | $	$ 0	$ 579
HELOC | Consumer | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	7	6
Recorded Investment | $	$ 1,141	$ 239
R/E installment loans | Consumer | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	3	2
Recorded Investment | $	$ 98	$ 146

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 180,424		$ 189,555		$ 202,068
Charge-offs	(58,733)		(45,797)		(46,394)
Recoveries	31,616		29,666		33,881
Provision/(provision credit) for loan losses	47,000		7,000		0
Ending Balance	200,307		180,424		189,555
Allowance - individually evaluated for impairment	25,916		28,814		41,767
Allowance - collectively evaluated for impairment	172,426		147,573		144,620
Allowance - purchased credit-impaired loans	1,965		4,037		3,168
Individually evaluated for impairment	246,900		240,533		259,713
Collectively evaluated for impairment	30,758,025		27,204,542		27,219,667
Purchased credit-impaired loans	56,186		90,457		179,549
Total loans, net of unearned income	31,061,111	[1]	27,535,532	[1]	27,658,929
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	130,258
Ending Balance	158,598		130,258
Allowance - individually evaluated for impairment	6,196		1,074
Allowance - collectively evaluated for impairment	151,554		126,361
Allowance - purchased credit-impaired loans	848		2,823
Individually evaluated for impairment	84,001		50,558
Collectively evaluated for impairment	24,273,207		20,437,747
Purchased credit-impaired loans	30,900		56,893
Commercial | C&I
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	98,947		98,211		89,398
Charge-offs	(33,778)		(15,492)		(17,657)
Recoveries	6,744		4,201		4,568
Provision/(provision credit) for loan losses	50,573		12,027		21,902
Ending Balance	122,486		98,947		98,211
Allowance - individually evaluated for impairment	6,196		1,074		6,044
Allowance - collectively evaluated for impairment	115,442		95,050		89,358
Allowance - purchased credit-impaired loans	848		2,823		2,809
Individually evaluated for impairment	82,438		48,592		43,024
Collectively evaluated for impairment	19,942,728		16,424,006		15,909,110
Purchased credit-impaired loans	25,925		41,730		105,139
Total loans, net of unearned income	20,051,091		16,514,328		16,057,273
Commercial | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	31,311		28,427		33,852
Charge-offs	(1,181)		(783)		(195)
Recoveries	489		339		966
Provision/(provision credit) for loan losses	5,493		3,328		(6,196)
Ending Balance	36,112		31,311		28,427
Allowance - individually evaluated for impairment	0		0		132
Allowance - collectively evaluated for impairment	36,112		31,311		28,291
Allowance - purchased credit-impaired loans	0		0		4
Individually evaluated for impairment	1,563		1,966		2,407
Collectively evaluated for impairment	4,330,479		4,013,741		4,181,908
Purchased credit-impaired loans	4,975		15,163		30,380
Total loans, net of unearned income	4,337,017		4,030,870		4,214,695
Consumer | Consumer real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	26,439		39,823		51,424
Charge-offs	(7,781)		(9,357)		(13,156)
Recoveries	17,000		19,666		22,723
Provision/(provision credit) for loan losses	(16,034)		(23,693)		(21,168)
Ending Balance	19,624		26,439		39,823
Allowance - individually evaluated for impairment	11,537		17,984		23,175
Allowance - collectively evaluated for impairment	7,001		7,368		16,293
Allowance - purchased credit-impaired loans	1,086		1,087		355
Individually evaluated for impairment	100,653		118,434		128,895
Collectively evaluated for impairment	5,881,330		6,099,272		6,311,817
Purchased credit-impaired loans	24,766		31,810		38,530
Total loans, net of unearned income	6,006,749		6,249,516		6,479,242
Consumer | Permanent Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,000		13,113		15,222
Charge-offs	(393)		(477)		(2,179)
Recoveries	3,148		1,421		2,509
Provision/(provision credit) for loan losses	(4,936)		(3,057)		(2,439)
Ending Balance	8,819		11,000		13,113
Allowance - individually evaluated for impairment	7,761		9,419		12,105
Allowance - collectively evaluated for impairment	1,058		1,581		1,008
Allowance - purchased credit-impaired loans	0		0		0
Individually evaluated for impairment	61,593		70,846		84,794
Collectively evaluated for impairment	108,797		151,602		203,026
Purchased credit-impaired loans	0		0		0
Total loans, net of unearned income	170,390		222,448		287,820
Consumer | Credit card & other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	12,727		9,981		12,172
Charge-offs	(15,600)		(19,688)		(13,207)
Recoveries	4,235		4,039		3,115
Provision/(provision credit) for loan losses	11,904		18,395		7,901
Ending Balance	13,266		12,727		9,981
Allowance - individually evaluated for impairment	422		337		311
Allowance - collectively evaluated for impairment	12,813		12,263		9,670
Allowance - purchased credit-impaired loans	31		127		0
Individually evaluated for impairment	653		695		593
Collectively evaluated for impairment	494,691		515,921		613,806
Purchased credit-impaired loans	520		1,754		5,500
Total loans, net of unearned income	$ 495,864		$ 518,370		$ 619,899
Restatement Adjustment | Commercial | C&I
Allowance for Loan and Lease Losses [Roll Forward]
Total loans, net of unearned income						$ (410,000)	$ (410,000)
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Premises, Equipment, and Leas_3

Premises, Equipment, and Leases - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Land	$ 98,804	$ 107,864
Buildings	428,695	461,665
Leasehold improvements	50,032	30,230
Furniture, fixtures, and equipment	205,493	196,469
Fixed assets held-for-sale	9,719	19,617
Premises and equipment, at cost	792,743	815,845
Less accumulated depreciation and amortization	337,737	321,804
Premises and equipment, net	$ 455,006	$ 494,041

Premises, Equipment, and Leas_4

Premises, Equipment, and Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Impairment losses	$ 26.9	$ 3.9
Impairment recoveries		1.5
Gain/(loss) on sale of properties, before applicable income taxes	2.3	$ 4.3
Undiscounted amount of leases that have not yet commenced	$ 2.6

Premises, Equipment, and Leas_5

Premises, Equipment, and Leases - Supplemental Balance Sheet Information (Details) $ in Thousands	Dec. 31, 2019USD ($)
Property, Plant and Equipment [Abstract]
Operating lease right-of use assets	$ 201,873
Finance lease right-of use assets	2,037
Total Lease Right-of Use Assets	203,910
Operating lease liabilities	223,128
Finance lease liabilities	2,708
Total Lease Liabilities	$ 225,836

Premises, Equipment, and Leas_6

Premises, Equipment, and Leases - Weighted Average Remaining Lease Terms and Discount Rate (Details)	Dec. 31, 2019
Weighted Average Remaining Lease Terms
Weighed average remaining lease terms - operating leases	12 years 4 months 9 days
Weighed average remaining lease terms - finance leases	9 years 7 months 9 days
Weighted Average Discount Rate
Weighted average discount rate - operating leases	3.24%
Weighted average discount rate - finance leases	4.77%

Premises, Equipment, and Leas_7

Premises, Equipment, and Leases - Lease Expense and Other Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Lease cost
Operating lease cost	$ 24,797
Finance lease cost:
Amortization of right-of-use assets	114
Interest on lease liabilities	135
Short-term lease cost	98
Sublease income	(366)
Total lease cost	24,778
Other information
(Gain)/loss on right-of-use asset impairment-Operating leases	2,551
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	23,053
Operating cash flows from finance leases	135
Finance Lease, Principal Payments	142
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	47,735
Finance leases	$ 1,475

Premises, Equipment, and Leas_8

Premises, Equipment, and Leases - Maturity of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Property, Plant and Equipment [Abstract]
2020	$ 26,594
2021	24,627
2022	23,553
2023	22,687
2024	22,224
2025 and after	156,524
Total lease payments	276,209
Less lease liability interest	(50,373)
Total	$ 225,836

Premises, Equipment, and Leas_9

Premises, Equipment, and Leases - Minimum Future Lease Payments For Noncancelable Operating Leases On Premises and Equipment (Details) $ in Thousands	Dec. 31, 2018USD ($)
Property, Plant and Equipment [Abstract]
2019	$ 27,524
2020	24,722
2021	20,954
2022	16,518
2023	13,174
2024 and after	42,370
Total lease payments	$ 145,262

Intangible Assets - Summary Of

Intangible Assets - Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Intangible Assets [Line Items]
Gross Carrying Amount	$ 240,637	$ 240,637
Accumulated Amortization	(110,437)	(85,603)
Net Carrying Value	130,200	155,034
Core deposit intangibles
Intangible Assets [Line Items]
Gross Carrying Amount	157,150	157,150
Accumulated Amortization	(47,372)	(28,150)
Net Carrying Value	109,778	129,000
Customer relationships
Intangible Assets [Line Items]
Gross Carrying Amount	77,865	77,865
Accumulated Amortization	(60,150)	(55,597)
Net Carrying Value	17,715	22,268
Other
Intangible Assets [Line Items]
Gross Carrying Amount	5,622	5,622
Accumulated Amortization	(2,915)	(1,856)
Net Carrying Value	2,707	3,766
State banking licenses
Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	$ 300	$ 300

Intangible Assets - Narrative (

Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Amortization expense	$ 24,800,000	$ 25,900,000	$ 8,700,000
Goodwill	1,432,787,000	1,432,787,000	$ 1,386,853,000	$ 191,371,000
Non-Strategic
Goodwill [Line Items]
Gross goodwill	200,000,000
Accumulated impairments	114,100,000
Accumulated divestiture related write-offs	85,900,000
Goodwill	$ 0	$ 0

Intangible Assets - Schedule Of

Intangible Assets - Schedule Of Estimated Aggregate Amortization Expense for Intangible Assets (Details) $ in Thousands	Dec. 31, 2019USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 21,159
2021	19,547
2022	17,412
2023	16,117
2024	$ 14,679

Intangible Assets - Summary O_2

Intangible Assets - Summary Of Gross Goodwill And Accumulated Impairment Losses And Write-Offs Detailed By Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 1,432,787	$ 1,386,853	$ 191,371
Additions	0	45,934	1,195,482
Goodwill, Ending balance	1,432,787	1,432,787	1,386,853
Regional Banking
Goodwill [Roll Forward]
Goodwill, Beginning balance	1,289,819	1,243,885	93,367
Additions	0	45,934	1,150,518
Goodwill, Ending balance	1,289,819	1,289,819	1,243,885
Fixed Income
Goodwill [Roll Forward]
Goodwill, Beginning balance	142,968	142,968	98,004
Additions	0	0	44,964
Goodwill, Ending balance	$ 142,968	$ 142,968	$ 142,968

Time Deposit Maturities - Narra

Time Deposit Maturities - Narrative (Details) $ in Billions	Dec. 31, 2019USD ($)
Maturities of Time Deposits [Abstract]
Total certificates of deposit $100,000 and more	$ 2.2
Time deposits, at or above FDIC insurance limit	$ 0.9

Time Deposit Maturities - Sched

Time Deposit Maturities - Schedule of Maturities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Maturities of Time Deposits [Abstract]
2020	$ 2,824,792
2021	259,290
2023	382,508
2024	90,034
2024	43,025
2025 and after	18,688
Total	$ 3,618,337

Short-term Borrowings - Narrati

Short-term Borrowings - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Federal Funds Purchased
Short-term Debt [Line Items]
Maximum maturity days	90 days
Trading Liabilities
Short-term Debt [Line Items]
Maximum holding days	90 days
Other Short-term Borrowings
Short-term Debt [Line Items]
Maximum original maturity period	1 year
Fixed Income Securities
Short-term Debt [Line Items]
Securities pledged to secure other short term borrowings	$ 41.3

Short-term Borrowings - Summary

Short-term Borrowings - Summary of Short-Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal Funds Purchased
Short-term Debt [Line Items]
Average balance	$ 737,715	$ 405,110	$ 447,137
Year-end balance	548,344	256,567	399,820
Maximum month-end outstanding	$ 1,281,853	$ 503,138	$ 568,490
Average rate for the year	2.08%	1.89%	1.06%
Average rate at year-end	1.55%	2.50%	1.48%
Securities Sold Under Agreements to Repurchase
Short-term Debt [Line Items]
Average balance	$ 701,164	$ 713,841	$ 578,666
Year-end balance	716,925	762,592	656,602
Maximum month-end outstanding	$ 772,092	$ 891,425	$ 743,684
Average rate for the year	1.89%	1.40%	0.72%
Average rate at year-end	1.72%	1.66%	0.64%
Trading Liabilities
Short-term Debt [Line Items]
Average balance	$ 503,302	$ 682,943	$ 685,891
Year-end balance	505,581	335,380	638,515
Maximum month-end outstanding	$ 754,220	$ 890,717	$ 896,943
Average rate for the year	2.48%	2.83%	2.26%
Average rate at year-end	2.07%	3.21%	2.22%
Other Short-term Borrowings
Short-term Debt [Line Items]
Average balance	$ 538,249	$ 1,046,585	$ 554,502
Year-end balance	2,253,045	114,764	2,626,213
Maximum month-end outstanding	$ 2,276,139	$ 2,229,155	$ 2,626,213
Average rate for the year	2.34%	1.82%	1.28%
Average rate at year-end	2.14%	2.48%	1.44%

Term Borrowings - Schedule of I

Term Borrowings - Schedule of Information Pertaining To Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Debt Instrument [Line Items]
Term borrowings	$ 791,368		$ 1,170,963
Loans, net of unearned income	31,061,111	[1]	27,535,532	[1]	$ 27,658,929
Retail Real Estate Residential
Debt Instrument [Line Items]
Loans, net of unearned income			16,200
First Horizon Bank | Senior Notes | Maturity date – December 1, 2019 – 2.95%
Debt Instrument [Line Items]
Term borrowings	$ 0		$ 395,872
Stated interest rate	2.95%		2.95%
First Horizon Bank | Collateralized By Loans | 2.19% on December 31, 2019 and 3.09% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 80,908		$ 76,642
Effective interest rate	2.19%		3.09%
First Horizon Bank | Collateralized By Loans | Other collateralized borrowings - SBA loans
Debt Instrument [Line Items]
Term borrowings	$ 21,975		$ 16,607
Debt, weighted average interest rate	3.95%		3.95%
First Horizon National Corporation | Senior Notes | Maturity date – December 15, 2020 – 3.50%
Debt Instrument [Line Items]
Term borrowings	$ 497,656		$ 486,739
Stated interest rate	3.50%		3.50%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - June 28, 2035 - 3.57% on December 31, 2019 and 4.47% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 2,752		$ 2,730
Stated interest rate	3.57%		4.47%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - December 15, 2035 - 3.26% on December 31, 2019 and 4.16% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 17,642		$ 17,456
Stated interest rate	3.26%		4.16%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - March 15, 2036 - 3.29% on December 31, 2019 and 4.19% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 8,847		$ 8,757
Stated interest rate	3.29%		4.19%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - March 15, 2036 - 3.43% on December 31, 2019 and 4.33% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 11,692		$ 11,587
Stated interest rate	3.43%		4.33%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - June 30, 2036 - 3.28% on December 31, 2019 and 4.12% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 26,217		$ 25,931
Stated interest rate	3.28%		4.12%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - July 7, 2036 - 3.54% on December 31, 2019 and 3.99% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 17,964		$ 17,803
Stated interest rate	3.54%		3.99%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - June 15, 2037 - 3.54% on December 31, 2019 and 4.44% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 50,681		$ 50,278
Stated interest rate	3.54%		4.44%
First Horizon National Corporation | Junior Subordinated Debt | Maturity date - September 6, 2037 - 3.32% on December 31, 2019 and 4.17% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 8,798		$ 8,713
Stated interest rate	3.32%		4.17%
FT Real Estate Securities Company, Inc. | Cumulative Preferred Stock | Maturity date – March 31, 2031 – 9.50%
Debt Instrument [Line Items]
Term borrowings	$ 46,236		$ 46,168
Stated interest rate	9.50%		9.50%
First Horizon ABS Trusts | Collateralized By Loans | 2.66% on December 31, 2018
Debt Instrument [Line Items]
Term borrowings	$ 0		$ 2,981
Effective interest rate			2.66%
First Tennessee New Market Corporation Investments | Maturity date – August 08, 2036 – 2.38%
Debt Instrument [Line Items]
Term borrowings	$ 0		$ 2,699
Stated interest rate			2.38%
Minimum | First Horizon Bank | Collateralized By Loans | Other collateralized borrowings - SBA loans
Debt Instrument [Line Items]
Debt term	3 years
Maximum | First Horizon Bank | Collateralized By Loans | Other collateralized borrowings - SBA loans
Debt Instrument [Line Items]
Debt term	25 years
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Term Borrowings - Schedule of A

Term Borrowings - Schedule of Annual Principal Repayment Requirements (Details) $ in Thousands	Dec. 31, 2019USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
2020	$ 500,000
2021	0
2022	236
2023	0
2024	0
2025 and after	$ 316,661

Term Borrowings - Narrative (De

Term Borrowings - Narrative (Details) - Capital Bank Financial Corporation - Junior Subordinated Debt - USD ($)	Nov. 30, 2017	Dec. 31, 2018
Debt Instrument [Line Items]
Debt face amount	$ 212,400,000
Debt term	30 years
Debt retired during period		$ 45,400,000

Preferred Stock (Details)

Preferred Stock (Details)	Jan. 31, 2013USD ($)shares	Dec. 31, 2005$ / sharesshares	Dec. 31, 2000$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)				1,000	1,000
Liquidation preference per share (in dollars per share) | $ / shares				$ 100,000	$ 100,000
Noncontrolling interest, subsidiary preferred stock | $				$ 600,000
First Horizon National Corporation | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	1,000
Aggregate liquidation preference | $	$ 100,000,000
Proceeds from issuance of preferred stock | $	$ 96,000,000
Percentage of cumulative preferred stock	6.20%
Value of depositary share	0.00025
FT Real Estate Securities Company, Inc. | Preferred Class B
Class of Stock [Line Items]
Percentage of cumulative preferred stock			9.50%
Stock issued (in shares)			50
Liquidation preference per share (in dollars per share) | $ / shares			$ 1,000,000
First Horizon Bank | Noncumulative Preferred Stock
Class of Stock [Line Items]
Stock issued (in shares)		300,000
Liquidation preference per share (in dollars per share) | $ / shares		$ 1,000
Declared and accrued preferred stock dividend basis spread on variable rate		0.85%
Declared and accrued preferred stock dividend fixed		3.75%
First Horizon Bank | Preferred Class A
Class of Stock [Line Items]
Noncontrolling interest, subsidiary preferred stock | $				$ 294,800,000	$ 294,800,000
Non Affiliates | FT Real Estate Securities Company, Inc. | Preferred Class B
Class of Stock [Line Items]
Stock issued (in shares)			47

Regulatory Capital and Restri_3

Regulatory Capital and Restrictions - Schedule of Actual Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
First Horizon National Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Actual Amount	$ 4,154,885	$ 3,940,117
Total Capital, Actual Ratio	11.22%	11.94%
Tier 1 Capital, Actual Amount	$ 3,760,450	$ 3,565,373
Tier 1 Capital, Actual Ratio	10.15%	10.80%
Common Equity Tier 1 Capital, Actual Amount	$ 3,408,936	$ 3,223,702
Common Equity Tier 1 Capital, Actual Ratio	9.20%	9.77%
Leverage, Actual Amount	$ 3,760,450	$ 3,565,373
Leverage, Actual Ratio	9.04%	9.09%
Total Capital, Capital Adequacy purposes, Amount	$ 2,963,663	$ 2,640,208
Total Capital, Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital, Capital Adequacy Purposes, Amount	$ 2,222,747	$ 1,980,156
Tier 1 Capital, Capital Adequacy Purposes, Ratio	6.00%	6.00%
Common Equity Tier 1 Capital, Capital Adequacy Purposes, Amount	$ 1,667,060	$ 1,485,117
Common Equity Tier 1 Capital, Capital Adequacy Purposes, Ratio	4.50%	4.50%
Leverage, Capital Adequacy Purposes, Amount	$ 1,663,338	$ 1,568,870
Leverage, Capital Adequacy purposes, Ratio	4.00%	4.00%
First Horizon Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Actual Amount	$ 3,944,613	$ 3,689,180
Total Capital, Actual Ratio	10.77%	11.32%
Tier 1 Capital, Actual Amount	$ 3,728,683	$ 3,492,541
Tier 1 Capital, Actual Ratio	10.18%	10.72%
Common Equity Tier 1 Capital, Actual Amount	$ 3,433,867	$ 3,197,725
Common Equity Tier 1 Capital, Actual Ratio	9.38%	9.81%
Leverage, Actual Amount	$ 3,728,683	$ 3,492,541
Leverage, Actual Ratio	9.12%	9.10%
Total Capital, Capital Adequacy purposes, Amount	$ 2,930,159	$ 2,607,406
Total Capital, Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital, Capital Adequacy Purposes, Amount	$ 2,197,620	$ 1,955,555
Tier 1 Capital, Capital Adequacy Purposes, Ratio	6.00%	6.00%
Common Equity Tier 1 Capital, Capital Adequacy Purposes, Amount	$ 1,648,215	$ 1,466,666
Common Equity Tier 1 Capital, Capital Adequacy Purposes, Ratio	4.50%	4.50%
Leverage, Capital Adequacy Purposes, Amount	$ 1,634,695	$ 1,535,279
Leverage, Capital Adequacy purposes, Ratio	4.00%	4.00%
Total Capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 3,662,699	$ 3,259,258
Total Capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 2,930,159	$ 2,607,406
Tier 1 Capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Common Equity Tier 1 Capital. To Be Well Capitalized Under Prompt Corrective Action, Amount	$ 2,380,755	$ 2,118,518
Common Equity Tier 1 Capital. To Be Well Capitalized Under Prompt Corrective Action, Ratio	6.50%	6.50%
Leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 2,043,368	$ 1,919,099
Leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%

Regulatory Capital and Restri_4

Regulatory Capital and Restrictions - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Undivided profits		$ 1,798,442	$ 1,542,408
Dividend paid to parent company		$ 345,000	$ 420,000
First Horizon Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital, Actual Ratio		10.18%	10.72%
Undivided profits		$ 1,200,000
Percent of capital stock and surplus threshold for credit extension to parent and certain financial subsidiaries		10.00%
Maximum amount of credit bank may extend to parent and certain financial institutions		$ 426,000
Covered transactions		$ 800
Percent of capital stock and surplus threshold for credit extension to affiliates		20.00%
Maximum amount of credit bank may extend to all affiliates		$ 851,900
FHN Financial Securities Corp.
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Covered transactions		$ 390,400
First Horizon National Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital, Actual Ratio		10.15%	10.80%
First Horizon Advisors, Inc.
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Covered transactions		$ 34,700
All Affiliates Member
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Covered transactions		425,900
Minimum | First Horizon Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash reserve required		396,100	$ 371,700
Vault cash included in cash reserves		$ 273,700	$ 273,700
Subsequent Event
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Dividend paid to parent company	$ 65,000
Subsequent Event | First Horizon Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Positive (negative) amount available for dividend payments				$ 331,200

Other Income and Other Expens_2

Other Income and Other Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
All other income and commissions:
Other service charges	$ 20,986	$ 15,122	$ 12,532
ATM and interchange fees	16,539	13,354	12,425
Deferred compensation	11,223	(3,224)	6,322
Mortgage banking	10,055	10,587	4,649
Dividend income	7,186	10,555	0
Letter of credit fees	5,582	5,298	4,661
Electronic banking fees	4,927	5,134	5,082
Insurance commissions	2,125	2,096	2,514
Gain/(loss) on extinguishment of debt	58	(15)	(14,329)
Other	32,277	16,902	10,061
Total	110,958	75,809	43,917
All other expense:
Travel and entertainment	12,119	16,442	11,462
Other insurance and taxes	10,179	9,684	9,686
Customer relations	9,098	5,583	5,750
Supplies	6,918	6,917	4,106
Employee training and dues	5,141	7,218	5,551
Miscellaneous loan costs	4,128	3,732	2,751
Litigation and regulatory matters	2,923	644	40,517
Non-service components of net periodic pension and post-retirement cost	2,304	5,251	2,144
Tax credit investments	1,809	4,712	3,468
OREO	1,479	2,630	1,006
Repurchase and foreclosure provision/(provision credit)	(1,007)	(1,039)	(22,527)
Other	71,039	73,223	48,693
Total	$ 126,130	$ 134,997	$ 112,607

Components of Other Comprehen_3

Components of Other Comprehensive Income/(Loss) - Schedule of Changes in AOCI (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		$ 4,785,380	$ 4,580,488	$ 2,705,084
Net unrealized gains/(losses)		125,056	(64,577)	(20,000)
Amounts reclassified from AOCI		11,952	10,997	2,375
Other comprehensive income/(loss)		137,008	(53,580)	(17,625)
Ending balance		5,076,008	4,785,380	4,580,488
Balance, as adjusted for ASU 2018-02				4,580,488
Balance as adjusted			4,784,369	4,580,555	$ 2,705,084
Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	[1]	(376,616)	(265,279)	(247,654)
Other comprehensive income/(loss)	[1]	137,008	(53,580)	(17,625)
Ending balance	[1]	(239,608)	(376,616)	(265,279)
Balance, as adjusted for ASU 2018-02	[1]			(322,825)
Balance as adjusted	[1]		(376,616)	(323,036)	$ (247,654)
Securities AFS
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(75,736)	(21,997)	(17,232)
Net unrealized gains/(losses)		106,614	(48,858)	(4,467)
Amounts reclassified from AOCI		201	(39)	(298)
Other comprehensive income/(loss)		106,815	(48,897)	(4,765)
Ending balance		31,079	(75,736)	(21,997)
Balance, as adjusted for ASU 2018-02				(26,834)
Balance as adjusted				(26,839)
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(12,112)	(6,366)	(1,265)
Net unrealized gains/(losses)		11,234	(6,284)	(2,156)
Amounts reclassified from AOCI		4,105	2,142	(2,945)
Other comprehensive income/(loss)		15,339	(4,142)	(5,101)
Ending balance		3,227	(12,112)	(6,366)
Balance, as adjusted for ASU 2018-02				(7,764)
Balance as adjusted				(7,970)
Pension and Post-retirement Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(288,768)	(236,916)	(229,157)
Net unrealized gains/(losses)		7,208	(9,435)	(13,377)
Amounts reclassified from AOCI		7,646	8,894	5,618
Other comprehensive income/(loss)		14,854	(541)	(7,759)
Ending balance		$ (273,914)	$ (288,768)	(236,916)
Balance, as adjusted for ASU 2018-02				(288,227)
Balance as adjusted				(288,227)
Accounting Standards Update 2018-02 | Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption	[1]			(57,546)
Accounting Standards Update 2018-02 | Securities AFS
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				(4,837)
Accounting Standards Update 2018-02 | Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				(1,398)
Accounting Standards Update 2018-02 | Pension and Post-retirement Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				(51,311)
Accounting Standards Update 2016-01 and 2017-12
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				67
Accounting Standards Update 2016-01 and 2017-12 | Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption	[1]			(211)
Accounting Standards Update 2016-01 and 2017-12 | Securities AFS
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				(5)
Accounting Standards Update 2016-01 and 2017-12 | Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				(206)
Accounting Standards Update 2016-01 and 2017-12 | Pension and Post-retirement Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adjustment to reflect adoption				$ 0
[1]	Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of Other comprehensive income/(loss) have been attributed solely to FHN as the controlling interest holder.

Components of Other Comprehen_4

Components of Other Comprehensive Income/(Loss) - Schedule of Reclassification from AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Debt securities gains/(losses), net	$ (267)	$ 52	$ 483
Interest and fees on loans	1,394,442	1,286,470	816,806
All other expense	126,130	134,997	112,607
Tax expense/(benefit)	133,291	157,602	131,892
Net income/(loss)	(452,373)	(556,507)	(176,980)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net income/(loss)	11,952	10,997	2,375
Reclassification out of Accumulated Other Comprehensive Income | Securities AFS
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Debt securities gains/(losses), net	267	(52)	(483)
Tax expense/(benefit)	(66)	13	185
Net income/(loss)	201	(39)	(298)
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest and fees on loans	5,452	2,845	(4,771)
Tax expense/(benefit)	(1,347)	(703)	1,826
Net income/(loss)	4,105	2,142	(2,945)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Post-retirement Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
All other expense	10,156	11,814	9,101
Tax expense/(benefit)	(2,510)	(2,920)	(3,483)
Net income/(loss)	$ 7,646	$ 8,894	$ 5,618

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Consolidated Statements of Income and Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax expense/(benefit)	$ 133,291	$ 157,602	$ 131,892
Net unrealized gains/(losses) on pension and other postretirement plans	4,876	(177)	(832)
Net unrealized gains/(losses) on securities available-for-sale	35,062	(16,054)	(2,955)
Net unrealized gains/(losses) on cash flow hedges	5,035	(1,360)	(3,163)
Total	$ 178,264	$ 140,011	$ 124,942

Income Taxes - Schedule of Co_2

Income Taxes - Schedule of Components of Income Tax Expense/(Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 105,294	$ 44,088	$ 10,012
State	13,640	9,957	879
Deferred:
Federal	5,091	81,852	114,059
State	9,266	21,705	6,942
Total	$ 133,291	$ 157,602	$ 131,892

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Tax Act, increase in tax expense			$ 82,000
Tax Act, tax benefit		$ 6,700
Net deferred tax assets	$ 69,001	127,867
Deferred tax assets after valuation allowance	250,603	254,624
Gross deferred tax liabilities	181,602	126,757
Unrecognized tax benefits	24,416	20,184	$ 4,271
Unrecognized tax benefits that would impact effective tax rate	18,400
Interest and income taxes accrued	2,900	1,600
Penalties and interest expense	1,300	$ 1,300
Domestic Tax Authority
Income Tax [Line Items]
Deferred tax assets after valuation allowance	43,800
Decrease in unrecognized tax benefits is reasonably possible	6,700
State and Local Jurisdiction
Income Tax [Line Items]
Deferred tax assets after valuation allowance	1,200
Decrease in unrecognized tax benefits is reasonably possible	$ 500

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal income tax rate	21.00%	21.00%	35.00%
Tax computed at statutory rate	$ 122,989	$ 149,963	$ 108,105
Increase/(decrease) resulting from:
State income taxes, net of federal income tax benefit	15,319	24,553	4,753
Bank-owned life insurance (“BOLI”)	(4,915)	(3,626)	(8,401)
401(k) – employee stock ownership plan (“ESOP”)	(764)	(653)	(904)
Tax-exempt interest	(6,480)	(6,538)	(7,890)
Non-deductible expenses	10,609	8,301	7,558
LIHTC credits and benefits, net of amortization	(4,419)	(7,178)	(5,327)
Other tax credits	0	(2,825)	(2,480)
Change in valuation allowance – DTA	(74)	(73)	(40,473)
Other changes in unrecognized tax benefits	4,044	6,143	46
Effect of Tax Act	0	(6,746)	82,027
Other	(3,018)	(3,719)	(5,122)
Total	$ 133,291	$ 157,602	$ 131,892

Income Taxes - Schedule of Oper

Income Taxes - Schedule of Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Deferred tax assets after valuation allowance	$ 250,603	$ 254,624
Federal loss carryforwards	43,774	49,821
State loss carryforwards	1,186	$ 7,225
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Deferred tax assets after valuation allowance	43,800
Domestic Tax Authority | Expiring 2028-2033
Tax Credit Carryforward [Line Items]
Federal loss carryforwards	43,774
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Deferred tax assets after valuation allowance	1,200
State and Local Jurisdiction | Expiring 2020-2022
Tax Credit Carryforward [Line Items]
State loss carryforwards	62
State and Local Jurisdiction | Expiring 2025-2035
Tax Credit Carryforward [Line Items]
State loss carryforwards	$ 1,124

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Loss reserves	$ 58,251	$ 65,015
Employee benefits	68,254	64,843
Accrued expenses	4,340	15,763
Lease liability	55,543	0
Federal loss carryforwards	43,774	49,821
State loss carryforwards	1,186	7,225
Investment in debt securities assets (ASC 320)	0	24,863
Other	19,255	27,168
Gross deferred tax assets	250,603	254,698
Valuation allowance	0	(74)
Deferred tax assets after valuation allowance	250,603	254,624
Deferred tax liabilities:
Depreciation and amortization	50,725	51,519
Investment in debt securities liabilities (ASC 320)	10,154	0
Equity investments	3,656	7,705
Other intangible assets	56,352	57,632
Prepaid expenses	10,024	9,218
ROU lease asset	50,151	0
Other	540	683
Gross deferred tax liabilities	181,602	126,757
Net deferred tax assets	$ 69,001	$ 127,867

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 20,184	$ 4,271
Increases related to prior year tax positions	2,522	16,695
Increases related to current year tax positions	2,170	1,576
Settlements		(2,080)
Lapse of statutes	(460)	(278)
Ending balance	$ 24,416	$ 20,184

Earnings Per Share - Schedule O

Earnings Per Share - Schedule Of Reconciliation Of Net Income/(Loss) to Net Income/(Loss) Available to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income/(loss)	$ 452,373	$ 556,507	$ 176,980
Net income attributable to noncontrolling interest	11,465	11,465	11,465
Net income/(loss) attributable to controlling interest	440,908	545,042	165,515
Preferred stock dividends	6,200	6,200	6,200
Net income/(loss) available to common shareholders	$ 434,708	$ 538,842	$ 159,315
Weighted average common shares outstanding - basic (in shares)	313,637	324,375	241,436
Effect of dilutive securities (in shares)	2,020	3,070	3,017
Weighted average common shares outstanding - diluted (in shares)	315,657	327,445	244,453
Net income/(loss) per share available to common shareholders (in dollars per share)	$ 1.39	$ 1.66	$ 0.66
Diluted income/(loss) per share available to common shareholders (in dollars per share)	$ 1.38	$ 1.65	$ 0.65

Earnings Per Share - Schedule_2

Earnings Per Share - Schedule Of Anti-Dilutive Options and Awards (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average exercise price of stock options excluded from the calculation of diluted EPS (in dollars per share)	$ 21.12	$ 24.33	$ 25.62
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from the calculation of diluted EPS (in shares)	2,359	2,256	2,468
Other Equity Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from the calculation of diluted EPS (in shares)	2,224	608	176

Contingencies and Other Discl_2

Contingencies and Other Disclosures (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Estimated litigation liability	$ 0.7
Accrued losses on loan repurchase exposure	$ 14.5	$ 32.3

Pension, Savings, and Other E_3

Pension, Savings, and Other Employee Benefits - Pension Plan and Savings Plan (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Nov. 30, 2017pension_plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to qualified plans		$ 509	$ 353	$ 5,100
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation		835,874	765,309	840,884
Fair value of plan assets		826,070	730,953	811,244
Employer contributions		3,510	3,948
Qualified pension
Defined Benefit Plan Disclosure [Line Items]
Contributions to qualified plans		$ 0
Qualified pension | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated social security benefits age		65 years
Qualified pension | Capital Bank Financial Corporation | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Number of additional qualified pension plans | pension_plan					2
Defined benefit plan, benefit obligation			17,100
Fair value of plan assets			16,500
Employer contributions	$ 500
Nonqualified pension | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		$ 5,200
Expected pension contribution		5,200
Flexible Benefits Contribution
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		$ 27,700	$ 29,300	$ 23,000
Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Employer investment in qualified defined contribution plan		100.00%
Maximum percent of employee pre-tax contributions that may be matched by the Company (percent)		6.00%

Pension, Savings, and Other E_4

Pension, Savings, and Other Employee Benefits - Schedule of Assumptions Used in the Defined Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Minimum required outstanding par value to each issue of bonds	$ 300,000,000
Qualified pension
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	3.31%	4.43%	3.76%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.43%	3.75%	4.37%
Nonqualified pension
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	3.08%	4.26%	3.59%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.26%	3.59%	4.07%
Other nonqualified pension
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	2.57%	3.83%	3.19%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	3.83%	3.19%	3.39%
Postretirement benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	2.85%	4.03%	3.37%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.04%	3.35%	3.68%
Postretirement benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	3.44%	4.56%	3.87%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.56%	3.87%	4.57%
Qualified pension/ postretirement benefits
Defined Benefit Plan Disclosure [Line Items]
Expected time horizon	30 years
Defined benefit plan assumptions used calculating benefit obligation expected long term return on assets	4.80%
Defined benefit plan assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	4.80%	4.20%	4.50%
Qualified pension/ postretirement benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Term used for assumption calculation	6 months
Qualified pension/ postretirement benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Term used for assumption calculation	30 years
Postretirement benefit (retirees post January 1, 1993)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation expected long term return on assets	6.85%
Defined benefit plan assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	6.85%	5.95%	6.00%
Postretirement benefit (retirees prior to January 1, 1993)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation expected long term return on assets	0.05%
Defined benefit plan assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	0.05%	2.15%	2.15%

Pension, Savings, and Other E_5

Pension, Savings, and Other Employee Benefits - Projected Benefit Obligation Affected by Interest Crediting Ratings (Details) - Pension Benefits $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)pension_plan	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of plans affected by interest credit ratings | pension_plan	1
Defined benefit plan, benefit obligation | $	$ 16,213	$ 16,947	$ 19,115
Interest crediting rate	9.66%	10.12%	9.28%

Pension, Savings, and Other E_6

Pension, Savings, and Other Employee Benefits - Schedule Of Components Of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 30	$ 41	$ 37
Interest cost	30,207	27,877	29,380
Expected return on plan assets	(36,908)	(32,897)	(36,015)
Prior service cost/(credit)	0	0	52
Actuarial (gain)/loss	9,888	12,102	9,521
Net periodic benefit cost	3,217	7,123	2,975
ASC 715 settlement expense	0	0	43
Total periodic benefit costs	3,217	7,123	3,018
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	94	133	107
Interest cost	1,413	1,309	1,305
Expected return on plan assets	(1,136)	(1,074)	(947)
Prior service cost/(credit)	32	0	95
Actuarial (gain)/loss	(493)	(387)	(567)
Net periodic benefit cost	(90)	(19)	(7)
ASC 715 settlement expense	194	99	0
Total periodic benefit costs	$ 104	$ 80	$ (7)

Pension, Savings, and Other E_7

Pension, Savings, and Other Employee Benefits - Schedule of Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation
Plan Amendments	$ 0	$ 0
Premium paid for annuity purchase		0
Change in plan assets
Premium paid for annuity purchase		0
Pension Benefits
Change in benefit obligation
Benefit obligation, beginning of year	765,309	840,884
Service cost	30	41	$ 37
Interest cost	30,207	27,877	29,380
Actuarial (gain)/loss	102,775	(68,724)
Actual benefits paid	(38,450)	(34,769)
Premium paid for annuity purchase	(23,997)
Benefit obligation, end of year	835,874	765,309	840,884
Change in plan assets
Fair value of plan assets, beginning of year	730,953	811,244
Actual return on plan assets	154,054	(49,470)
Employer contributions	3,510	3,948
Actual benefits paid – settlement payments	0	0
Actual benefits paid – other payments	(38,450)	(34,769)
Premium paid for annuity purchase	(23,997)
Fair value of plan assets, end of year	826,070	730,953	811,244
Funded (unfunded) status of the plans	(9,804)	(34,356)
Amounts recognized in the Statements of Condition
Other assets	27,433	1,911
Other liabilities	(37,237)	(36,267)
Net asset/(liability) at end of year	(9,804)	(34,356)
Other Benefits
Change in benefit obligation
Benefit obligation, beginning of year	35,174	39,562
Service cost	94	133	107
Interest cost	1,413	1,309	1,305
Plan Amendments	408
Actuarial (gain)/loss	6,848	(3,648)
Actual benefits paid	(1,641)	(2,182)
Premium paid for annuity purchase	0	0
Benefit obligation, end of year	42,296	35,174	39,562
Change in plan assets
Fair value of plan assets, beginning of year	17,432	18,753
Actual return on plan assets	3,355	(928)
Employer contributions	1,259	1,789
Actual benefits paid – settlement payments	(1,641)	(2,182)
Actual benefits paid – other payments	0	0
Premium paid for annuity purchase	0	0
Fair value of plan assets, end of year	20,405	17,432	$ 18,753
Funded (unfunded) status of the plans	(21,891)	(17,742)
Amounts recognized in the Statements of Condition
Other assets	17,240	14,356
Other liabilities	(39,131)	(32,098)
Net asset/(liability) at end of year	$ (21,891)	$ (17,742)

Pension, Savings, and Other E_8

Pension, Savings, and Other Employee Benefits - Funded (Unfunded) Status of Plan (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 37,237	$ 36,267
Funded status of the plans	(9,804)	(34,356)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	39,131	32,098
Funded status of the plans	(21,891)	(17,742)
Qualified pension | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Funded status of the plans	$ 27,400	$ 1,900

Pension, Savings, and Other E_9

Pension, Savings, and Other Employee Benefits - Schedule of Balances Reflected in AOCI On a Pre-Tax Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost/(credit)	$ 0	$ 0
Net actuarial (gain)/loss	362,799	387,058
Total	362,799	387,058
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost/(credit)	408	0
Net actuarial (gain)/loss	(1,555)	(6,451)
Total	$ (1,147)	$ (6,451)

Pension, Savings, and Other _10

Pension, Savings, and Other Employee Benefits - Schedule of Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial (gain)/loss arising during measurement period	$ (14,371)	$ 13,643
Prior service cost/(credit) arising during measurement period	0	0
Items amortized during the measurement period:
Prior service credit/(cost)	0	0
Actuarial (gain)/loss	(9,888)	(12,102)
Total recognized in other comprehensive income	(24,259)	1,541
Other Benefits
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial (gain)/loss arising during measurement period	4,629	(1,646)
Prior service cost/(credit) arising during measurement period	408	0
Items amortized during the measurement period:
Prior service credit/(cost)	(32)	0
Actuarial (gain)/loss	299	288
Total recognized in other comprehensive income	$ 5,304	$ (1,358)

Pension, Savings, and Other _11

Pension, Savings, and Other Employee Benefits - Schedule of Expected Benefit Payment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Threshold amortization percentage of projected benefit obligation	10.00%
Threshold amortization, percentage of market-related value of plan assets	10.00%
Pension Benefits
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2020	$ 38,304
2021	40,215
2022	41,152
2023	42,631
2024	43,752
2025-2029	231,267
Other Benefits
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2020	1,675
2021	1,744
2022	1,818
2023	1,897
2024	1,977
2025-2029	$ 11,127

Pension, Savings, and Other _12

Pension, Savings, and Other Employee Benefits - Schedule of Fair Value of Plan Assets (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 826,070	$ 730,953	$ 811,244
Cash equivalents and money market funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	9,300	13,855
U.S. treasuries
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	5,377	28,626
Corporate, municipal and foreign bonds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	514,965	688,472
Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	296,428
Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	9,300	13,855
Level 1 | Cash equivalents and money market funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	9,300	13,855
Level 1 | U.S. treasuries
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 1 | Corporate, municipal and foreign bonds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 1 | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0
Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	816,770	717,098
Level 2 | Cash equivalents and money market funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 2 | U.S. treasuries
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	5,377	28,626
Level 2 | Corporate, municipal and foreign bonds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	514,965	688,472
Level 2 | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	296,428
Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 3 | Cash equivalents and money market funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 3 | U.S. treasuries
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 3 | Corporate, municipal and foreign bonds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	$ 0
Level 3 | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 0

Pension, Savings, and Other _13

Pension, Savings, and Other Employee Benefits - Schedule of Retiree Medical Plan Assets By Asset Category (Details) - Other Benefits - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 20,405	$ 17,432	$ 18,753
Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	20,405	17,432
Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Cash equivalents and money market funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	130	207
Cash equivalents and money market funds | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	130	207
Cash equivalents and money market funds | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Cash equivalents and money market funds | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Equity mutual funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	13,163	10,387
Equity mutual funds | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	13,163	10,387
Equity mutual funds | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Equity mutual funds | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Fixed income mutual funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	7,112	6,838
Fixed income mutual funds | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	7,112	6,838
Fixed income mutual funds | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Fixed income mutual funds | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 0	$ 0

Stock Options, Restricted Sto_3

Stock Options, Restricted Stock, and Dividend Reinvestment Plans - Narrative (Details)	12 Months Ended
	Dec. 31, 2019USD ($)plan$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans | plan	1
Options granted (in shares) | shares	1,761,343
Number of shares available for grant (in shares) | shares	4,961,854
Award vesting period	3 years
Payment deferral period	2 years
Percent of performance condition achieved	100.00%
Value of annual equity awards to non employee directors	$ 65,000	$ 65,000
Total intrinsic value of options exercised	$ 4,400,000	$ 3,000,000	$ 2,500,000
Stock options granted or converted (in shares) | shares	530,787	394,296	1,483,323
Grants in period, weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.69	$ 3.89	$ 4.69
Stock-based compensation expense	$ 22,730,000	$ 23,171,000	$ 20,627,000
Total income tax benefits recognized	$ 5,600,000	5,700,000	7,900,000
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares) | shares	0
Nonvested Restricted Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 29,500,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 1 month 6 days
Total grant date fair value of shares vested	$ 14,600,000	$ 12,600,000	$ 9,900,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 1,400,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 6 months
Expiration period	20 years
Equity Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) | shares	6,350,062
Performance Condition Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of performance evaluation	3 years	3 years	3 years
Performance Condition Awards | PSUs Granted After 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Post vest holding period	2 years
Percent of performance condition achieved	10420.00%
Performance Condition Awards | Units Granted In Two Thousand Fifteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Post vest holding period	2 years
Market Condition Award | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	7 years
Dividend Reinvestment Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Quarterly value of shares available for purchase under dividend reinvestment and stock purchase plan	$ 25
Dividend Reinvestment Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Quarterly value of shares available for purchase under dividend reinvestment and stock purchase plan	$ 10,000
Capital Bank Financial Corporation | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Options Granted Since 2008 | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	7 years

Stock Options, Restricted Sto_4

Stock Options, Restricted Stock, and Dividend Reinvestment Plans - Summary of Restricted and Performance Stock Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Shares/ Units:
Beginning Balance (in shares)	4,089,824
Shares/units granted (in shares)	1,761,343
Shares/units vested (in shares)	(1,042,270)
Shares/units cancelled (in shares)	(120,649)
Ending Balance (in shares)	4,688,248	4,089,824
Weighted average grant date fair value (per share)
Nonvested Beginning Balance (in dollars per share)	$ 16.27
Shares/units granted (in dollars per share)	14.93	$ 18.70	$ 18.83
Shares/units vested (in dollars per share)	13.99
Shares/units canceled (in dollars per share)	17.43
Nonvested Ending Balance (in dollars per share)	$ 16.25	$ 16.27
Percent of performance achieved for nonvested performance units	100.00%

Stock Options, Restricted Sto_5

Stock Options, Restricted Stock, and Dividend Reinvestment Plans - Summary of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares
Options Outstanding
Beginning of period, Outstanding (in shares) | shares	5,904,687
Options granted (in shares) | shares	530,787
Options exercised (in shares) | shares	(895,695)
Options expired/cancelled (in shares) | shares	(607,998)
End of period, Outstanding (in shares) | shares	4,931,781
Options exercisable (in shares) | shares	3,347,210
Options expected to vest (in shares) | shares	1,584,571
Weighted Average Exercise Price (per share)
Beginning of period, weighted average exercise price (in dollars per share) | $ / shares	$ 16.16
Options granted, weighted average exercise price (in dollars per share) | $ / shares	15.43
Options exercised, weighted average exercise price (in dollars per share) | $ / shares	10.79
Options expired/cancelled, weighted average exercise price (in dollars per share) | $ / shares	27.94
End of period, weighted average exercise price (in dollars per share) | $ / shares	$ 15.61
Outstanding, weighted average contractual term	3 years 29 days
Outstanding, aggregate intrinsic value | $	$ 13,385
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 15.76
Options exercisable, weighted average contractual term	2 years 3 months 25 days
Options exercisable, aggregate intrinsic value | $	$ 10,060
Options expected to vest, weighted average exercise price (in dollars per share) | $ / shares	$ 15.28
Options expected to vest, weighted average remaining contractual term	4 years 8 months 4 days
Options expected to vest, aggregate intrinsic value | $	$ 3,325

Stock Options, Restricted Sto_6

Stock Options, Restricted Stock, and Dividend Reinvestment Plans - Summary of Assumptions to Estimate the Fair Value of Stock Options (Details) - Employee Stock Option	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	3.63%	2.57%	1.82%
Expected weighted-average lives of options granted	6 years 2 months 26 days	6 years 2 months 15 days	6 years 1 month 2 days
Expected weighted-average volatility	24.76%	24.61%	26.90%
Expected volatility range, minimum	23.07%	23.95%	24.36%
Expected volatility range, maximum	26.45%	25.26%	29.44%
Risk-free interest rate	2.53%	2.69%	2.07%

Business Segment Information -

Business Segment Information - Amounts of Consolidated Revenue, Expense, Tax and Assets (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019segment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting, Measurement Disclosures [Abstract]
Number of operating segments | segment	4
Segment Reporting Information [Line Items]
Net interest income		$ 1,210,187	$ 1,220,317	$ 842,314
Provision/(provision credit) for loan losses		47,000	7,000	0
Noninterest income		654,080	722,788	490,219
Noninterest expense		1,231,603	1,221,996	1,023,661
Income/(loss) before income taxes		585,664	714,109	308,872
Provision/(benefit) for income taxes (Note 15)		133,291	157,602	131,892
Net income/(loss)		452,373	556,507	176,980
Average assets		41,744,264	40,225,459	29,924,813
Depreciation and amortization		65,239	59,125	70,924
Expenditures for long-lived assets		49,159	38,166	287,642
Expenses associated with rebranding initiatives		21,300
Charitable foundation contributions		11,000		8,800
Regional Banking
Segment Reporting Information [Line Items]
Net interest income		1,196,318	1,197,471	844,439
Provision/(provision credit) for loan losses		66,059	24,643	21,451
Noninterest income		329,834	311,763	259,546
Noninterest expense		789,033	826,262	628,050
Income/(loss) before income taxes		671,060	658,329	454,484
Provision/(benefit) for income taxes (Note 15)		158,148	154,659	162,348
Net income/(loss)		512,912	503,670	292,136
Average assets		30,785,775	28,366,987	19,469,287
Depreciation and amortization		31,719	31,316	45,734
Expenditures for long-lived assets		35,207	36,164	274,992
Fixed Income
Segment Reporting Information [Line Items]
Net interest income		26,044	35,753	18,122
Noninterest income		278,423	164,769	217,086
Noninterest expense		236,660	189,373	206,427
Income/(loss) before income taxes		67,807	11,149	28,781
Provision/(benefit) for income taxes (Note 15)		16,137	2,097	9,698
Net income/(loss)		51,670	9,052	19,083
Average assets		2,961,655	3,297,579	2,539,899
Depreciation and amortization		8,150	9,603	8,036
Expenditures for long-lived assets		909	646	1,877
Corporate
Segment Reporting Information [Line Items]
Net interest income		(40,774)	(64,191)	(59,261)
Noninterest income		41,357	239,263	8,887
Noninterest expense		195,683	177,923	144,333
Income/(loss) before income taxes		(195,100)	(2,851)	(194,707)
Provision/(benefit) for income taxes (Note 15)		(51,348)	(10,889)	(47,967)
Net income/(loss)		(143,752)	8,038	(146,740)
Average assets		6,951,611	7,090,069	6,370,951
Depreciation and amortization		27,649	23,285	16,764
Expenditures for long-lived assets		12,560	308	8,951
(Gain)/loss on securities				(14,300)
Non-Strategic
Segment Reporting Information [Line Items]
Net interest income		28,599	51,284	39,014
Provision/(provision credit) for loan losses		(19,059)	(17,643)	(21,451)
Noninterest income		4,466	6,993	4,700
Noninterest expense		10,227	28,438	44,851
Income/(loss) before income taxes		41,897	47,482	20,314
Provision/(benefit) for income taxes (Note 15)		10,354	11,735	7,813
Net income/(loss)		31,543	35,747	12,501
Average assets		1,045,223	1,470,824	1,544,676
Depreciation and amortization		(2,279)	(5,079)	390
Expenditures for long-lived assets		$ 483	1,048	$ 1,822
Visa Class B Shares
Segment Reporting Information [Line Items]
Gain on sale of investments			$ 212,900

Business Segment Information _2

Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Fixed income	$ 278,789	$ 167,882	$ 216,625
Deposit transactions and cash management	131,663	133,281	110,592
Brokerage, management fees and commissions	55,467	54,803	48,514
Trust services and investment management	29,511	29,806	28,420
Bankcard income	28,308	29,304	26,435
Bank-owned life insurance (BOLI)	19,210	18,955	15,124
Debt securities gains/(losses), net	(267)	52	483
Equity securities gains/(losses), net	441	212,896	109
Other income/(loss)	110,958	75,809	43,917
Total noninterest income	654,080	722,788	490,219
Gain on sale of TRUPs loans	1,105	3,777	0
Visa Class B Shares
Disaggregation of Revenue [Line Items]
Gain on sale of investments		212,900
Underwriting, Portfolio Advisory, and Other Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	33,700	28,900
Regional Banking
Disaggregation of Revenue [Line Items]
Fixed income	122	417	430
Deposit transactions and cash management	124,832	126,832	105,058
Brokerage, management fees and commissions	55,462	54,800	48,513
Trust services and investment management	29,600	29,852	28,491
Bankcard income	28,540	29,434	25,983
Bank-owned life insurance (BOLI)	0	0	0
Debt securities gains/(losses), net	0	0	386
Equity securities gains/(losses), net	0	0	0
Other income/(loss)	91,278	70,428	50,685
Total noninterest income	329,834	311,763	259,546
Fixed Income
Disaggregation of Revenue [Line Items]
Fixed income	277,561	163,382	216,195
Deposit transactions and cash management	4	12	3
Brokerage, management fees and commissions	0	0	0
Trust services and investment management	0	0	0
Bankcard income	11	0	0
Bank-owned life insurance (BOLI)	0	0	0
Debt securities gains/(losses), net	0	0	0
Equity securities gains/(losses), net	0	0	0
Other income/(loss)	847	1,375	888
Total noninterest income	278,423	164,769	217,086
Corporate
Disaggregation of Revenue [Line Items]
Fixed income	0	0	0
Deposit transactions and cash management	6,610	6,214	5,338
Brokerage, management fees and commissions	0	0	1
Trust services and investment management	(89)	(46)	(71)
Bankcard income	248	226	225
Bank-owned life insurance (BOLI)	19,210	18,955	15,124
Debt securities gains/(losses), net	(267)	52	97
Equity securities gains/(losses), net	441	212,896	109
Other income/(loss)	15,204	966	(11,936)
Total noninterest income	41,357	239,263	8,887
(Gain)/loss on securities			14,300
Non-Strategic
Disaggregation of Revenue [Line Items]
Fixed income	1,106	4,083	0
Deposit transactions and cash management	217	223	193
Brokerage, management fees and commissions	5	3	0
Trust services and investment management	0	0	0
Bankcard income	(491)	(356)	227
Bank-owned life insurance (BOLI)	0	0	0
Debt securities gains/(losses), net	0	0	0
Equity securities gains/(losses), net	0	0	0
Other income/(loss)	3,629	3,040	4,280
Total noninterest income	4,466	6,993	$ 4,700
Gain on sale of TRUPs loans	$ 1,100	$ 4,100

Variable Interest Entities - Su

Variable Interest Entities - Summary of VIE Consolidated By FHN (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 633,728		$ 781,291
Loans, net of unearned income	31,061,111	[1]	27,535,532	[1]	$ 27,658,929
Less: Allowance for loan losses	200,307		180,424		$ 189,555	$ 202,068
Total net loans	30,860,804		27,355,108
Other assets	2,046,338		1,802,939
Total assets	43,310,900		40,832,258
Liabilities:
Term borrowings	791,368		1,170,963
Other liabilities	873,079		580,335
Total liabilities	38,234,892		36,046,878
On-Balance Sheet Consumer Loan Securitization
Assets:
Cash and due from banks	0		0
Loans, net of unearned income	0		16,213
Less: Allowance for loan losses	0		0
Total net loans	0		16,213
Other assets	0		35
Total assets	0		16,248
Liabilities:
Term borrowings	0		2,981
Other liabilities	0		0
Total liabilities	0		2,981
Rabbi Trusts Used for Deferred Compensation Plans
Assets:
Other assets	91,873		78,446
Total assets	91,873		78,446
Liabilities:
Other liabilities	70,830		56,700
Total liabilities	$ 70,830		$ 56,700
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Variable Interest Entities - Na

Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entities [Abstract]
Expenses associated with LIHTC investments accounted for using the equity method	$ 1.3	$ 4.1	$ 1.8
Variable interest entity, decline in related debt	$ 2.7

Variable Interest Entities - _2

Variable Interest Entities - Summary of the Impact of Qualifying LIHTC Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
LIHTC credits and benefits, net of amortization	$ (4,419)	$ (7,178)	$ (5,327)
Low income housing tax credits
Variable Interest Entity [Line Items]
Amortization of qualifying LIHTC investments	15,482	10,793	14,037
LIHTC credits and benefits, net of amortization	(13,539)	(10,232)	(11,037)
Other tax benefits related to qualifying LIHTC investments
Variable Interest Entity [Line Items]
LIHTC credits and benefits, net of amortization	$ (5,677)	$ (7,370)	$ (5,045)

Variable Interest Entities - _3

Variable Interest Entities - Summary of VIE Not Consolidated By FHN (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Variable Interest Entity [Line Items]
Loans, net of unearned income	$ 31,061,111	[1]	$ 27,535,532	[1]	$ 27,658,929
Trading securities	1,346,207		1,448,168
Term borrowings	791,368		1,170,963
Securities available-for-sale (Note 3)	4,445,403		4,626,470
Low income housing partnerships
Variable Interest Entity [Line Items]
Maximum Loss Exposure	237,668		156,056
Liability Recognized	136,404		80,427
Maximum loss exposure, contractual funding commitments	136,400		80,400
Low income housing partnerships | Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments	101,300		75,600
Other tax credit investments
Variable Interest Entity [Line Items]
Maximum Loss Exposure	6,282		3,619
Liability Recognized	0		0
Other tax credit investments | Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments			2,700
Small issuer trust preferred holdings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	238,397		270,585
Liability Recognized	0		0
On-balance sheet trust preferred securitization
Variable Interest Entity [Line Items]
Maximum Loss Exposure	33,265		37,532
Liability Recognized	80,908		76,642
Loans, net of unearned income	112,500		112,500
Trading securities	1,700		1,700
Term borrowings	80,900		76,600
Proprietary residential mortgage securitizations
Variable Interest Entity [Line Items]
Maximum Loss Exposure	941		1,524
Liability Recognized	0		0
Holdings of agency mortgage-backed securities
Variable Interest Entity [Line Items]
Maximum Loss Exposure	4,537,685		4,842,630
Liability Recognized	0		0
Trading securities	500,000		500,000
Securities available-for-sale (Note 3)	4,000,000		4,400,000
Commercial loan troubled debt restructurings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	45,169		40,590
Liability Recognized	0		0
Maximum loss exposure, contractual funding commitments	1,800		2,300
Loans, net of unearned income	43,400		38,200
Sale-leaseback transaction
Variable Interest Entity [Line Items]
Maximum Loss Exposure	18,111		16,327
Liability Recognized	0		0
Proprietary trust preferred issuances
Variable Interest Entity [Line Items]
Maximum Loss Exposure	0		0
Liability Recognized	$ 167,014		$ 167,014
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Thousands	Nov. 01, 2019	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total trading revenues				$ 228,400	$ 132,300	$ 173,900
Term borrowings				791,368	1,170,963
Cash flow hedge length of time			5 years
Hedged amount of foreign currency denominated loans				18,400	11,000
Cash Flow Hedges | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)			$ 250,000
Notional		$ 650,000
Visa Class B Shares
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities related to sale				22,800	31,500
Long Term Debt Hedged With Fair Value Interest Rate Derivatives Using Long Haul Method
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings				500,000
Long Term Debt Hedged With Fair Value Interest Rate Derivatives Using Long Haul Method | First Horizon Bank
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings				400,000
Additional Derivative Agreements | Derivative Instruments With Adjustable Collateral Posting Thresholds
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds				63,100	15,000
Net fair value of derivative liabilities with adjustable posting thresholds				6,400	34,900
Collateral received				148,500	80,200
Securities posted collateral				18,400	13,300
Additional Derivative Agreements | Derivative Instruments With Accelerated Termination Provisions
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds				63,100	19,000
Net fair value of derivative liabilities with adjustable posting thresholds				10,300	33,200
Collateral received				148,500	84,500
Securities posted collateral				22,700	15,200
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash payables				143,334	39,637
Interest Rate Contract | Cash Flow Hedges | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)				900,000	900,000
Minimum | Cash Flow Hedges | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge length of time		3 years
Maximum | Cash Flow Hedges | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge length of time		7 years
Counterparties
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash receivables				136,600	76,000
Collateral cash payables				$ 53,000	$ 34,000
Senior Subordinated Notes | Senior Debt Maturing In December 2019
Derivative Instruments, Gain (Loss) [Line Items]
Debt redeemed	$ 400,000

Derivatives - Derivatives Assoc

Derivatives - Derivatives Associated with Fixed Income Trading Activities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Customer Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 2,697,522	$ 2,271,448
Assets	65,768	18,744
Liabilities	6,858	27,768
Offsetting Upstream Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	2,697,522	2,271,448
Assets	2,583	4,014
Liabilities	3,994	9,041
Option Contracts Purchased | Long
Derivative Instruments, Gain (Loss) [Line Items]
Notional	40,000	20,000
Assets	131	25
Liabilities	0	0
Forwards and Futures Purchased
Derivative Instruments, Gain (Loss) [Line Items]
Notional	9,217,350	4,684,177
Assets	17,029	28,304
Liabilities	3,187	181
Forwards and Futures Sold
Derivative Instruments, Gain (Loss) [Line Items]
Notional	9,403,112	4,967,454
Assets	3,611	522
Liabilities	$ 16,620	$ 30,055

Derivatives - Derivatives Ass_2

Derivatives - Derivatives Associated With Interest Rate Risk Management Activities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Customer Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 2,697,522	$ 2,271,448
Assets	65,768	18,744
Liabilities	6,858	27,768
Offsetting Upstream Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	2,697,522	2,271,448
Assets	2,583	4,014
Liabilities	3,994	9,041
Customer Interest Rate Contracts Hedging | Hedging Instruments And Hedged Items | Customer Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	3,044,067	2,029,162
Assets	90,394	20,262
Liabilities	3,515	25,880
Customer Interest Rate Contracts Hedging | Hedging Instruments And Hedged Items | Offsetting Upstream Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	3,044,067	2,029,162
Assets	3,537	8,154
Liabilities	9,735	9,153
Debt Hedging | Hedging Instruments And Hedged Items | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional	500,000	900,000
Assets		127
Liabilities	69	6
Debt Hedging | Hedging Instruments And Hedged Items | Par
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	500,000	900,000
Debt Hedging | Hedging Instruments And Hedged Items | Cumulative fair value hedging adjustments
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	(1,604)	(15,094)
Debt Hedging | Hedging Instruments And Hedged Items | Unamortized premium/(discount) and issuance costs
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	(740)	(2,295)
Debt Hedging | Hedging Instruments And Hedged Items | Term Borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	$ 497,656	$ 882,611

Derivatives - Gains_(Losses) on

Derivatives - Gains/(Losses) on Derivatives Associated with Interest Rate Risk Management Activities (Details) - Hedging Instruments And Hedged Items - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Customer Interest Rate Contracts Hedging | Customer Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(losses) related to interest rate derivatives	$ 92,497	$ 1,779	$ (10,703)
Customer Interest Rate Contracts Hedging | Offsetting Upstream Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(losses) related to interest rate derivatives	(92,497)	(1,779)	10,699
Debt Hedging | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(losses) related to interest rate derivatives	13,240	(1,648)	(7,766)
Debt Hedging | Term Borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) related to term borrowings	$ (13,234)	$ 1,622	$ 7,582

Derivatives - Derivatives Ass_3

Derivatives - Derivatives Associated With Cash Flow Hedges (Details) - Cash Flow Hedges - Hedging Instruments And Hedged Items - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Notional			$ 650,000
Variability in cash flows related to debt instruments (primarily loans)				$ 250,000
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)	$ 900,000	$ 900,000
Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional	900,000	900,000
Assets		888
Liabilities	$ 241	$ 5

Derivatives - Gains_(Losses) _2

Derivatives - Gains/(Losses) on Derivatives Associated with Cash Flow Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) expected to be reclassified to earnings in the next twelve months	$ 1,000
Cash Flow Hedges | Hedging Instruments And Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Losses)	11,234	$ (6,284)
Gains/(Losses)			$ (2,156)
Gain/(loss) reclassified from AOCI into Interest income	4,105	2,142
Gain/(loss) reclassified from AOCI into Interest income			(2,945)
Cash Flow Hedges | Hedging Instruments And Hedged Items | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Losses)	$ 20,625	$ (5,502)
Gains/(Losses)			$ (8,264)

Derivatives - Derivative Assets

Derivatives - Derivative Assets And Collateral Received (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Gross amounts of recognized assets	$ 183,115	$ 81,475
Derivative assets not subject to master netting agreements	20,800	28,900
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized assets	162,344	52,562
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	162,344	52,562
Gross amounts not offset in the Statements of Condition, Derivative liabilities available for offset	(5,604)	(12,745)
Collateral Received	(143,334)	(39,637)
Net amount	$ 13,406	$ 180

Derivatives - Derivative Liabil

Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 67,480	$ 133,713
Derivative liabilities not subject to master netting agreements	43,000	61,900
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	24,431	71,853
Gross amounts offset in the Statements of Condition	0	0
Net amounts of liabilities presented in the Statements of Condition	24,431	71,853
Gross amounts not offset in the Statements of Condition, Derivative assets available for offset	(5,604)	(12,745)
Collateral pledged	(18,689)	(54,773)
Net amount	$ 138	$ 4,335

Master Netting and Similar Ag_3

Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Securities Purchased under Agreements to Resell [Abstract]
Gross amounts of recognized assets	$ 586,629	$ 386,443
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	586,629	386,443
Offsetting securities sold under agreements to repurchase	(21,004)	(261)
Securities collateral (not recognized on FHN’s Statements of Condition)	(562,702)	(382,756)
Net amount	$ 2,923	$ 3,426

Master Netting and Similar Ag_4

Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Securities Sold under Agreements to Repurchase [Abstract]
Gross amounts of recognized liabilities	$ 716,925	$ 762,592
Offsetting securities purchased under agreements to resell	0	0
Net amounts of liabilities presented in the Statements of Condition	716,925	762,592
Offsetting securities purchased under agreements to resell	(21,004)	(261)
Securities/ government guaranteed loans collateral	(695,879)	(762,322)
Net amount	$ 42	$ 9

Master Netting and Similar Ag_5

Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Schedule of the Remaining Contractual Maturity by Collateral Type of Securities Sold Under Agreements To Repurchase (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	$ 716,925	$ 762,592
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	712,380	757,372
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	4,545	5,220
U.S. treasuries
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	41,364	16,321
U.S. treasuries | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	41,364	16,321
U.S. treasuries | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
Government agency issued MBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	345,718	419,708
Government agency issued MBS | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	341,173	414,488
Government agency issued MBS | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	4,545	5,220
Other U.S. government agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	54,924	36,688
Other U.S. government agencies | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	54,924	36,688
Other U.S. government agencies | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
Government guaranteed loans (SBA and USDA)
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	274,919	289,875
Government guaranteed loans (SBA and USDA) | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	274,919	289,875
Government guaranteed loans (SBA and USDA) | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	$ 0	$ 0

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 1,346,207	$ 1,448,168
Loans held-for-sale	14,033	16,273
Securities available-for-sale	4,445,403	4,626,470
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	14,033	16,273
Securities available-for-sale	4,445,403	4,626,470
Total other assets	252,573	141,494
Total assets	6,058,216	6,232,405
Total other liabilities	67,480	133,713
Total liabilities	573,061	469,093
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Securities available-for-sale	0	0
Total other assets	90,098	88,845
Total assets	90,098	88,845
Total other liabilities	19,807	30,236
Total liabilities	19,807	30,236
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Securities available-for-sale	4,426,267	4,616,568
Total other assets	162,475	52,649
Total assets	5,934,008	6,115,861
Total other liabilities	24,878	71,937
Total liabilities	530,459	407,317
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	14,033	16,273
Securities available-for-sale	19,136	9,902
Total other assets	0	0
Total assets	34,110	27,699
Total other liabilities	22,795	31,540
Total liabilities	22,795	31,540
U.S. treasuries | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	100	98
U.S. treasuries | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
U.S. treasuries | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	100	98
U.S. treasuries | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Government agency issued mortgage-backed securities (“MBS”) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	2,348,517	2,420,106
Government agency issued mortgage-backed securities (“MBS”) | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Government agency issued mortgage-backed securities (“MBS”) | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	2,348,517	2,420,106
Government agency issued mortgage-backed securities (“MBS”) | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Government agency issued collateralized mortgage obligations (“CMO”) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	1,670,492	1,958,695
Government agency issued collateralized mortgage obligations (“CMO”) | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Government agency issued collateralized mortgage obligations (“CMO”) | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	1,670,492	1,958,695
Government agency issued collateralized mortgage obligations (“CMO”) | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Other U.S. government agencies | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	306,092	149,786
Other U.S. government agencies | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Other U.S. government agencies | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	306,092	149,786
Other U.S. government agencies | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
States and municipalities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	60,526	32,573
States and municipalities | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
States and municipalities | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	60,526	32,573
States and municipalities | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Corporates and other debt | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	40,540	55,310
Corporates and other debt | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Corporates and other debt | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	40,540	55,310
Corporates and other debt | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Interest-Only Strip (elected fair value) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	19,136	9,902
Interest-Only Strip (elected fair value) | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Interest-Only Strip (elected fair value) | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	0	0
Interest-Only Strip (elected fair value) | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	19,136	9,902
Fixed Income | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,345,266	1,446,644
Total trading liabilities - fixed income	505,581	335,380
Fixed Income | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,345,266	1,446,644
Total trading liabilities - fixed income	505,581	335,380
Fixed Income | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | U.S. treasuries | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	134,844	169,799
Total trading liabilities - fixed income	406,380	207,739
Fixed Income | U.S. treasuries | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | U.S. treasuries | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	134,844	169,799
Total trading liabilities - fixed income	406,380	207,739
Fixed Income | U.S. treasuries | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Government agency issued mortgage-backed securities (“MBS”) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	268,024	133,373
Total trading liabilities - fixed income	33
Fixed Income | Government agency issued mortgage-backed securities (“MBS”) | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0
Fixed Income | Government agency issued mortgage-backed securities (“MBS”) | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	268,024	133,373
Total trading liabilities - fixed income	33
Fixed Income | Government agency issued mortgage-backed securities (“MBS”) | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0
Fixed Income | Government agency issued collateralized mortgage obligations (“CMO”) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	250,652	330,456
Fixed Income | Government agency issued collateralized mortgage obligations (“CMO”) | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Fixed Income | Government agency issued collateralized mortgage obligations (“CMO”) | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	250,652	330,456
Fixed Income | Government agency issued collateralized mortgage obligations (“CMO”) | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Fixed Income | Other U.S. government agencies | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	124,972	76,733
Total trading liabilities - fixed income	88	98
Fixed Income | Other U.S. government agencies | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Other U.S. government agencies | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	124,972	76,733
Total trading liabilities - fixed income	88	98
Fixed Income | Other U.S. government agencies | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | States and municipalities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	120,744	54,234
Fixed Income | States and municipalities | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Fixed Income | States and municipalities | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	120,744	54,234
Fixed Income | States and municipalities | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Fixed Income | Corporates and other debt | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	445,253	682,068
Total trading liabilities - fixed income	99,080	127,543
Fixed Income | Corporates and other debt | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Corporates and other debt | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	445,253	682,068
Total trading liabilities - fixed income	99,080	127,543
Fixed Income | Corporates and other debt | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Equity, mutual funds, and other | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	777	(19)
Fixed Income | Equity, mutual funds, and other | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Fixed Income | Equity, mutual funds, and other | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	777	(19)
Fixed Income | Equity, mutual funds, and other | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Trading securities—mortgage banking | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	941	1,524
Trading securities—mortgage banking | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Trading securities—mortgage banking | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Trading securities—mortgage banking | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	941	1,524
Deferred compensation mutual funds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	46,815	37,771
Deferred compensation mutual funds | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	46,815	37,771
Deferred compensation mutual funds | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Deferred compensation mutual funds | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Equity, mutual funds, and other | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	22,643	22,248
Equity, mutual funds, and other | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	22,643	22,248
Equity, mutual funds, and other | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Equity, mutual funds, and other | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Derivatives, forwards and futures | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	20,640	28,826
Total other liabilities	19,807	30,236
Derivatives, forwards and futures | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	20,640	28,826
Total other liabilities	19,807	30,236
Derivatives, forwards and futures | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, forwards and futures | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, interest rate contracts | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	162,413	52,214
Total other liabilities	24,412	71,853
Derivatives, interest rate contracts | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, interest rate contracts | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	162,413	52,214
Total other liabilities	24,412	71,853
Derivatives, interest rate contracts | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, other | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	62	435
Total other liabilities	23,261	31,624
Derivatives, other | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, other | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	62	435
Total other liabilities	466	84
Derivatives, other | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total other assets	0	0
Total other liabilities	$ 22,795	$ 31,540

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities - Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance, net derivative	$ (31,540)	$ (5,645)	$ (6,245)
Total net gains/(losses) included in: Net Income, net derivatives	(3,946)	(4,677)	(596)
Purchases, net derivatives	0	(28,100)	0
Sales, net derivatives	0	0	0
Settlements, net derivatives	12,691	6,882	1,196
Net transfers in/(out) level 3, net derivatives	0	0	0
Ending balance, net derivative	(22,795)	(31,540)	(5,645)
Net unrealized gains/(losses) included in net income	(3,946)	(4,677)	(596)
Trading securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, assets	1,524	2,151	2,573
Total net gains/(losses) included in : Net income, assets	(285)	173	448
Purchases, assets	0	0	0
Sales, assets	0	0	(5)
Settlements, assets	(298)	(800)	(865)
Net transfers into/(out of) Level 3, assets	0	0	0
Ending balance, assets	941	1,524	2,151
Net unrealized gains/(losses) included in net income	(66)	6	303
Interest-Only Strip (elected fair value)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, assets	9,902	1,270	0
Total net gains/(losses) included in : Net income, assets	(4,725)	(398)	1,021
Purchases, assets	86	0	1,413
Sales, assets	(47,469)	(16,840)	(11,431)
Settlements, assets	0	0	0
Net transfers into/(out of) Level 3, assets	61,342	25,870	10,267
Ending balance, assets	19,136	9,902	1,270
Net unrealized gains/(losses) included in net income	(1,984)	(1,025)	(171)
Loans Held For Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, assets	16,273	18,926	21,924
Total net gains/(losses) included in : Net income, assets	1,828	1,239	1,547
Purchases, assets	10	62	168
Sales, assets	0	0	0
Settlements, assets	(4,078)	(3,598)	(4,346)
Net transfers into/(out of) Level 3, assets	0	(356)	(367)
Ending balance, assets	14,033	16,273	18,926
Net unrealized gains/(losses) included in net income	$ 1,828	$ 1,239	$ 1,547

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Nonrecurring Fair Value Measurements (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		$ 14,033		$ 16,273
Loans, net of unearned income		31,061,111	[1]	27,535,532	[1]	$ 27,658,929
Other real estate owned (OREO)	[2]	17,838		25,290
Non Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		42,208		48,259		26,666
Other real estate owned (OREO)		15,660		22,387		39,566
Other assets		10,608		8,845		26,521
Net gains (losses) loans, net of unearned income		(7,341)		(841)		(1,687)
Net gains (losses) other real estate owned		(927)		(2,599)		(996)
Net gains (losses) other assets		(1,809)		(4,712)		(3,468)
Net gains (losses) financial assets		(11,862)		(12,489)		(7,744)
Non Recurring | SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		493,524		578,291		466,977
Net gains (losses) loans held-for-sale		(1,817)		(2,541)		(1,629)
Non Recurring | Other Consumer Loans Class
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale				18,712
Net gains (losses) loans held-for-sale				(1,809)
Non Recurring | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		516		541		618
Net gains (losses) loans held-for-sale		32		13		36
Non Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		0		0		0
Other real estate owned (OREO)		0		0		0
Other assets		0		0		0
Non Recurring | Level 1 | SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		0		0		0
Non Recurring | Level 1 | Other Consumer Loans Class
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale				0
Non Recurring | Level 1 | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		0		0		0
Non Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		0		0		0
Other real estate owned (OREO)		0		0		0
Other assets		0		0		0
Non Recurring | Level 2 | SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		492,595		577,280		465,504
Non Recurring | Level 2 | Other Consumer Loans Class
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale				18,712
Non Recurring | Level 2 | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		0		0		0
Non Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		42,208		48,259		26,666
Other real estate owned (OREO)		15,660		22,387		39,566
Other assets		10,608		8,845		26,521
Non Recurring | Level 3 | SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		929		1,011		1,473
Non Recurring | Level 3 | Other Consumer Loans Class
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale				0
Non Recurring | Level 3 | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale		$ 516		$ 541		$ 618
[1]	December 31, 2019 and 2018 include $18.8 million and $28.6 million
[2]	December 31, 2019 and 2018 include $9.2 million and $9.7 million , respectively, of foreclosed residential real estate.

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Gain/(loss) on instrument specific credit risk	$ 0.4	$ 0.2	$ 0.5
Disposition of Acquired Properties | Corporate
Segment Reporting Information [Line Items]
Long-lived asset impairment	4.6	3.9	3
Reversed asset impairment charges	0.7	$ 1.5
Disposition of Acquired Properties | Regional Banking
Segment Reporting Information [Line Items]
Long-lived asset impairment			$ 0.8
2019 Business Optimization | Disposition of Acquired Properties | Corporate
Segment Reporting Information [Line Items]
Long-lived asset impairment	1.5
2019 Business Optimization | Leased Assets | Corporate
Segment Reporting Information [Line Items]
Long-lived asset impairment	14
Reversed asset impairment charges	1.4
Rebranding Initiative | Leased Assets | Corporate
Segment Reporting Information [Line Items]
Long-lived asset impairment	$ 7.1

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities - Schedule Of Unobservable Inputs Utilized In Determining The Fair Value Of Level 3 Recurring And Non-Recurring Measurements (Details) $ in Thousands	Dec. 31, 2019USD ($)month	Dec. 31, 2018USD ($)month
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 4,445,403	$ 4,626,470
Loans held-for-sale	14,033	16,273
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, other	22,795	31,540
Loans net of unearned income	42,208	48,259
OREO, fair value	15,660	22,387
Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	929	1,011
Other Assets | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets	$ 10,608	$ 8,845
Constant prepayment rate | Weighted Average | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.10	0.10
Constant prepayment rate | Minimum | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.08	0.08
Constant prepayment rate | Maximum | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.12	0.12
Bond equivalent yield | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.09	0.09
Bond equivalent yield | Weighted Average | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.09	0.09
Foreclosure losses | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.64	0.63
Foreclosure losses | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.50	0.50
Foreclosure losses | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.66	0.66
Visa covered litigation resolution amount | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input, value	$ 5,800,000	$ 5,600,000
Visa covered litigation resolution amount | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input, value	5,400,000	5,000,000
Visa covered litigation resolution amount | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input, value	$ 6,000,000	$ 5,800,000
Probability of resolution scenarios | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.16	0.23
Probability of resolution scenarios | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.10	0.10
Probability of resolution scenarios | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.50	0.25
Time until resolution | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input | month	29	36
Time until resolution | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input | month	15	18
Time until resolution | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input | month	39	48
Marketability adjustments for specific properties | Minimum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0	0
Other assets, measurement input	0	0
Marketability adjustments for specific properties | Maximum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.10	0.10
Other assets, measurement input	0.25	0.25
Borrowing base certificates adjustment | Minimum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.20	0.20
Borrowing base certificates adjustment | Maximum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.50	0.50
Financial Statements/Auction values adjustment | Minimum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0	0
Financial Statements/Auction values adjustment | Maximum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.25	0.25
Adjustment for value changes since appraisal | Minimum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO measurement input	0	0
Adjustment for value changes since appraisal | Maximum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO measurement input	0.10	0.10
Adjustments to current sales yields for specific properties | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0	0
Adjustments to current sales yields for specific properties | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0.15	0.15
Residential Real Estate | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 14,549	$ 16,815
First Mortgages | Prepayment Speeds | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.041	0.03
First Mortgages | Prepayment Speeds | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.03	0.02
First Mortgages | Prepayment Speeds | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.14	0.10
First Mortgages | Loss severity | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.143	0.17
First Mortgages | Loss severity | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.03	0.02
First Mortgages | Loss severity | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.24	0.25
HELOC | Prepayment Speeds | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.076	0.075
HELOC | Prepayment Speeds | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0	0.05
HELOC | Prepayment Speeds | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.12	0.12
HELOC | Loss severity | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.50	0.50
HELOC | Loss severity | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0	0.50
HELOC | Loss severity | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.72	1
Interest-Only Strip (elected fair value) | Available-for-sale Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 19,136	$ 9,902
Interest-Only Strip (elected fair value) | Constant prepayment rate | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12
Interest-Only Strip (elected fair value) | Constant prepayment rate | Weighted Average | Discounted cash flow | Available-for-sale Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12	0.11
Interest-Only Strip (elected fair value) | Constant prepayment rate | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input		0.11
Interest-Only Strip (elected fair value) | Constant prepayment rate | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input		0.12
Interest-Only Strip (elected fair value) | Bond equivalent yield | Weighted Average | Discounted cash flow | Available-for-sale Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.16	0.14
Interest-Only Strip (elected fair value) | Bond equivalent yield | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.16	0.14
Interest-Only Strip (elected fair value) | Bond equivalent yield | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.17

Fair Value of Assets and Liab_8

Fair Value of Assets and Liabilities - Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	$ 14,033	$ 16,273
Fair value carrying amount less aggregate unpaid principal - Total loans	(5,245)	(7,294)
Nonaccrual loans	3,532	4,536
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(3,114)	(3,592)
Loans 90 days or more past due and still accruing	163	171
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing	(105)	(110)
Aggregate unpaid principal
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	19,278	23,567
Nonaccrual loans	6,646	8,128
Loans 90 days or more past due and still accruing	268	281
Loans Held For Sale | Mortgage Banking Noninterest Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in fair value, gain (loss)	$ 1,828	$ 1,239	$ 1,547

Fair Value of Assets and Liab_9

Fair Value of Assets and Liabilities - Summary Of Book Value And Estimated Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Assets:
Total loans, net of unearned income and allowance for loan losses		$ 30,860,804	$ 27,355,108
Short-term financial assets:
Interest-bearing cash		482,405	1,277,611
Federal funds sold		46,536	237,591
Securities purchased under agreements to resell		586,629	386,443
Trading securities		1,346,207	1,448,168
Loans held-for-sale	[1]	593,790	679,149
Securities available-for-sale (Note 3)		4,445,403	4,626,470
Securities held-to-maturity (Note 3)		10,000	10,000
Derivative assets		183,115	81,475
Other assets:
Total assets		43,310,900	40,832,258
Deposits:
Trading Liabilities		505,581	335,380
Short-term financial liabilities:
Federal funds purchased		548,344	256,567
Securities sold under agreements to repurchase		716,925	762,592
Other short-term borrowings		2,253,045	114,764
Term borrowings:
Other long term borrowings		791,368	1,170,963
Derivative liabilities		67,480	133,713
Total liabilities		38,234,892	36,046,878
Level 3 | FHLB-Cincinnati Stock
Term borrowings:
Restricted investments		76,000	87,900
Level 3 | FRB Stock
Term borrowings:
Restricted investments		130,700	130,700
Reported Value Measurement
Assets:
Total loans, net of unearned income and allowance for loan losses		30,860,804	27,355,108
Short-term financial assets:
Interest-bearing cash		482,405	1,277,611
Federal funds sold		46,536	237,591
Securities purchased under agreements to resell		586,629	386,443
Total short-term financial assets		1,115,570	1,901,645
Trading securities		1,346,207	1,448,168
Loans held-for-sale		593,790	679,149
Securities available-for-sale (Note 3)		4,445,403	4,626,470
Securities held-to-maturity (Note 3)		10,000	10,000
Derivative assets		183,115	81,475
Other assets:
Tax credit investments		247,075	163,300
Deferred compensation assets		46,815	37,771
Equity, mutual funds, and other		229,352	240,780
Total other assets		523,242	441,851
Total assets		39,078,131	36,543,866
Deposits:
Defined maturity		3,618,337	4,105,777
Trading Liabilities		505,581	335,380
Short-term financial liabilities:
Federal funds purchased		548,344	256,567
Securities sold under agreements to repurchase		716,925	762,592
Other short-term borrowings		2,253,045	114,764
Total short-term financial liabilities		3,518,314	1,133,923
Term borrowings:
Real estate investment trust-preferred		46,236	46,168
Term borrowings - new market tax credit investment			2,699
Secured borrowings		21,975	19,588
Junior subordinated debentures		144,593	143,255
Other long term borrowings		578,564	959,253
Total term borrowings		791,368	1,170,963
Derivative liabilities		67,480	133,713
Total liabilities		8,501,080	6,879,756
Reported Value Measurement | Commercial, financial, and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		19,928,605	16,415,381
Reported Value Measurement | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		4,300,905	3,999,559
Reported Value Measurement | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		5,987,125	6,223,077
Reported Value Measurement | Permanent Mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		161,571	211,448
Reported Value Measurement | Credit Card and Other
Assets:
Total loans, net of unearned income and allowance for loan losses		482,598	505,643
Reported Value Measurement | Mortgage Loans
Short-term financial assets:
Loans held-for-sale		14,033	16,273
Reported Value Measurement | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held-for-sale		493,525	578,291
Reported Value Measurement | Other Consumer Loans Class
Short-term financial assets:
Loans held-for-sale		5,197	25,134
Reported Value Measurement | Mortgage Loan - LOCOM
Short-term financial assets:
Loans held-for-sale		81,035	59,451
Estimate of Fair Value Measurement
Assets:
Total loans, net of unearned income and allowance for loan losses		31,218,152	27,364,329
Short-term financial assets:
Interest-bearing cash		482,405	1,277,611
Federal funds sold		46,536	237,591
Securities purchased under agreements to resell		586,629	386,443
Total short-term financial assets		1,115,570	1,901,645
Trading securities		1,346,207	1,448,168
Loans held-for-sale		596,535	684,349
Securities available-for-sale (Note 3)		4,445,403	4,626,470
Securities held-to-maturity (Note 3)		10,001	9,843
Derivative assets		183,115	81,475
Other assets:
Tax credit investments		244,755	159,452
Deferred compensation assets		46,815	37,771
Equity, mutual funds, and other		229,352	240,780
Total other assets		520,922	438,003
Total assets		39,435,905	36,554,282
Deposits:
Defined maturity		3,631,090	4,082,822
Trading Liabilities		505,581	335,380
Short-term financial liabilities:
Federal funds purchased		548,344	256,567
Securities sold under agreements to repurchase		716,925	762,592
Other short-term borrowings		2,253,045	114,764
Total short-term financial liabilities		3,518,314	1,133,923
Term borrowings:
Real estate investment trust-preferred		47,000	47,000
Term borrowings - new market tax credit investment			2,664
Secured borrowings		21,975	19,588
Junior subordinated debentures		142,375	134,266
Other long term borrowings		574,287	960,483
Total term borrowings		785,637	1,164,001
Derivative liabilities		67,480	133,713
Total liabilities		8,508,102	6,849,839
Loan commitments		3,656	2,551
Standby and other commitments		5,513	5,043
Estimate of Fair Value Measurement | Commercial, financial, and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		20,096,397	16,438,272
Estimate of Fair Value Measurement | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		4,300,489	3,997,736
Estimate of Fair Value Measurement | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		6,153,016	6,194,066
Estimate of Fair Value Measurement | Permanent Mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		181,171	227,254
Estimate of Fair Value Measurement | Credit Card and Other
Assets:
Total loans, net of unearned income and allowance for loan losses		487,079	507,001
Estimate of Fair Value Measurement | Mortgage Loans
Short-term financial assets:
Loans held-for-sale		14,033	16,273
Estimate of Fair Value Measurement | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held-for-sale		496,270	583,491
Estimate of Fair Value Measurement | Other Consumer Loans Class
Short-term financial assets:
Loans held-for-sale		5,197	25,134
Estimate of Fair Value Measurement | Mortgage Loan - LOCOM
Short-term financial assets:
Loans held-for-sale		81,035	59,451
Estimate of Fair Value Measurement | Level 1
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Short-term financial assets:
Interest-bearing cash		482,405	1,277,611
Federal funds sold		0	0
Securities purchased under agreements to resell		0	0
Total short-term financial assets		482,405	1,277,611
Trading securities		0	0
Loans held-for-sale		0	0
Securities available-for-sale (Note 3)		0	0
Securities held-to-maturity (Note 3)		0	0
Derivative assets		20,640	28,826
Other assets:
Tax credit investments		0	0
Deferred compensation assets		46,815	37,771
Equity, mutual funds, and other		22,643	22,248
Total other assets		69,458	60,019
Total assets		572,503	1,366,456
Deposits:
Defined maturity		0	0
Trading Liabilities		0	0
Short-term financial liabilities:
Federal funds purchased		0	0
Securities sold under agreements to repurchase		0	0
Other short-term borrowings		0	0
Total short-term financial liabilities		0	0
Term borrowings:
Real estate investment trust-preferred		0	0
Term borrowings - new market tax credit investment			0
Secured borrowings		0	0
Junior subordinated debentures		0	0
Other long term borrowings		0	0
Total term borrowings		0	0
Derivative liabilities		19,807	30,236
Total liabilities		19,807	30,236
Estimate of Fair Value Measurement | Level 1 | Commercial, financial, and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 1 | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 1 | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 1 | Permanent Mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 1 | Credit Card and Other
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 1 | Mortgage Loans
Short-term financial assets:
Loans held-for-sale		0	0
Estimate of Fair Value Measurement | Level 1 | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held-for-sale		0	0
Estimate of Fair Value Measurement | Level 1 | Other Consumer Loans Class
Short-term financial assets:
Loans held-for-sale		0	0
Estimate of Fair Value Measurement | Level 1 | Mortgage Loan - LOCOM
Short-term financial assets:
Loans held-for-sale		0	0
Estimate of Fair Value Measurement | Level 2
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Short-term financial assets:
Interest-bearing cash		0	0
Federal funds sold		46,536	237,591
Securities purchased under agreements to resell		586,629	386,443
Total short-term financial assets		633,165	624,034
Trading securities		1,345,266	1,446,644
Loans held-for-sale		500,520	588,898
Securities available-for-sale (Note 3)		4,426,267	4,616,568
Securities held-to-maturity (Note 3)		0	0
Derivative assets		162,475	52,649
Other assets:
Tax credit investments		0	0
Deferred compensation assets		0	0
Equity, mutual funds, and other		0	0
Total other assets		0	0
Total assets		7,067,693	7,328,793
Deposits:
Defined maturity		3,631,090	4,082,822
Trading Liabilities		505,581	335,380
Short-term financial liabilities:
Federal funds purchased		548,344	256,567
Securities sold under agreements to repurchase		716,925	762,592
Other short-term borrowings		2,253,045	114,764
Total short-term financial liabilities		3,518,314	1,133,923
Term borrowings:
Real estate investment trust-preferred		0	0
Term borrowings - new market tax credit investment			0
Secured borrowings		0	0
Junior subordinated debentures		0	0
Other long term borrowings		574,287	960,483
Total term borrowings		574,287	960,483
Derivative liabilities		24,878	71,937
Total liabilities		8,254,150	6,584,545
Estimate of Fair Value Measurement | Level 2 | Commercial, financial, and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 2 | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 2 | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 2 | Permanent Mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 2 | Credit Card and Other
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Estimate of Fair Value Measurement | Level 2 | Mortgage Loans
Short-term financial assets:
Loans held-for-sale		0	0
Estimate of Fair Value Measurement | Level 2 | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held-for-sale		495,323	582,476
Estimate of Fair Value Measurement | Level 2 | Other Consumer Loans Class
Short-term financial assets:
Loans held-for-sale		5,197	6,422
Estimate of Fair Value Measurement | Level 2 | Mortgage Loan - LOCOM
Short-term financial assets:
Loans held-for-sale		0	0
Estimate of Fair Value Measurement | Level 3
Assets:
Total loans, net of unearned income and allowance for loan losses		31,218,152	27,364,329
Short-term financial assets:
Interest-bearing cash		0	0
Federal funds sold		0	0
Securities purchased under agreements to resell		0	0
Total short-term financial assets		0	0
Trading securities		941	1,524
Loans held-for-sale		96,015	95,451
Securities available-for-sale (Note 3)		19,136	9,902
Securities held-to-maturity (Note 3)		10,001	9,843
Derivative assets		0	0
Other assets:
Tax credit investments		244,755	159,452
Deferred compensation assets		0	0
Equity, mutual funds, and other		206,709	218,532
Total other assets		451,464	377,984
Total assets		31,795,709	27,859,033
Deposits:
Defined maturity		0	0
Trading Liabilities		0	0
Short-term financial liabilities:
Federal funds purchased		0	0
Securities sold under agreements to repurchase		0	0
Other short-term borrowings		0	0
Total short-term financial liabilities		0	0
Term borrowings:
Real estate investment trust-preferred		47,000	47,000
Term borrowings - new market tax credit investment			2,664
Secured borrowings		21,975	19,588
Junior subordinated debentures		142,375	134,266
Other long term borrowings		0	0
Total term borrowings		211,350	203,518
Derivative liabilities		22,795	31,540
Total liabilities		234,145	235,058
Estimate of Fair Value Measurement | Level 3 | Commercial, financial, and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		20,096,397	16,438,272
Estimate of Fair Value Measurement | Level 3 | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		4,300,489	3,997,736
Estimate of Fair Value Measurement | Level 3 | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		6,153,016	6,194,066
Estimate of Fair Value Measurement | Level 3 | Permanent Mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		181,171	227,254
Estimate of Fair Value Measurement | Level 3 | Credit Card and Other
Assets:
Total loans, net of unearned income and allowance for loan losses		487,079	507,001
Estimate of Fair Value Measurement | Level 3 | Mortgage Loans
Short-term financial assets:
Loans held-for-sale		14,033	16,273
Estimate of Fair Value Measurement | Level 3 | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held-for-sale		947	1,015
Estimate of Fair Value Measurement | Level 3 | Other Consumer Loans Class
Short-term financial assets:
Loans held-for-sale		0	18,712
Estimate of Fair Value Measurement | Level 3 | Mortgage Loan - LOCOM
Short-term financial assets:
Loans held-for-sale		81,035	59,451
Contractual Amount
Term borrowings:
Loan commitments		12,355,220	10,884,975
Standby and other commitments		$ 459,268	$ 446,958
[1]	December 31, 2019 and 2018 include $6.8 million and $8.4 million , respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.

Restructuring, Repositioning,_3

Restructuring, Repositioning, and Efficiency (Details) - 2019 Business Optimization $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ 39,819
Employee compensation, incentives and benefits
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	10,503
Professional Fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	16,014
Occupancy
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	818
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	12,484
Employee Severance
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	10,500
Professional Fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	16,000
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ 12,000

Parent Company Financial Info_3

Parent Company Financial Information - Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets:
Allowance for loan losses	$ (200,307)	$ (180,424)	$ (189,555)	$ (202,068)
Investments in subsidiaries:
Other assets	2,046,338	1,802,939
Total assets	43,310,900	40,832,258
Liabilities and equity:
Term borrowings	791,368	1,170,963
Total liabilities	38,234,892	36,046,878
Total equity	5,076,008	4,785,380	$ 4,580,488	$ 2,705,084
Total liabilities and equity	43,310,900	40,832,258
Parent Company
Assets:
Cash	369,268	334,485
Notes receivable	2,716	2,888
Allowance for loan losses	0	(925)
Investments in subsidiaries:
Bank	5,038,909	4,741,105
Non-bank	17,892	20,281
Other assets	171,121	180,757
Total assets	5,599,906	5,278,591
Liabilities and equity:
Accrued employee benefits and other liabilities	177,080	158,648
Term borrowings	642,249	629,994
Total liabilities	819,329	788,642
Total equity	4,780,577	4,489,949
Total liabilities and equity	$ 5,599,906	$ 5,278,591

Parent Company Financial Info_4

Parent Company Financial Information - Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Dividend income:
Total dividend income	$ 7,186	$ 10,555	$ 0
Other income/(loss)	110,958	75,809	43,917
Provision/(provision credit) for loan losses	47,000	7,000	0
Interest expense:
Interest on term borrowings	53,263	53,047	36,037
Total interest expense	414,153	325,704	147,616
Compensation, employee benefits and other expense	695,351	658,223	587,465
Income/(loss) before income taxes	585,664	714,109	308,872
Income tax(benefit)/expense	133,291	157,602	131,892
Equity in undistributed net income/(loss) of subsidiaries:
Net income/(loss) attributable to controlling interest	440,908	545,042	165,515
Parent Company
Dividend income:
Bank	345,000	420,000	250,000
Non-bank	756	1,386	1,097
Total dividend income	345,756	421,386	251,097
Interest income	76	29	0
Other income/(loss)	965	83	190
Total income	346,797	421,498	251,287
Provision/(provision credit) for loan losses	(925)	0	0
Interest expense:
Interest on term borrowings	31,224	31,315	17,936
Total interest expense	31,224	31,315	17,936
Compensation, employee benefits and other expense	52,447	53,401	43,783
Total expense	82,746	84,716	61,719
Income/(loss) before income taxes	264,051	336,782	189,568
Income tax(benefit)/expense	(19,285)	(38,509)	512
Income/(loss) before equity in undistributed net income of subsidiaries	283,336	375,291	189,056
Equity in undistributed net income/(loss) of subsidiaries:
Bank	160,257	170,939	(24,255)
Non-bank	(2,685)	(1,188)	714
Net income/(loss) attributable to controlling interest	$ 440,908	$ 545,042	$ 165,515

Parent Company Financial Info_5

Parent Company Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income/(loss) attributable to controlling interest	$ 440,908	$ 545,042	$ 165,515
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities:
Depreciation, amortization, and other	65,239	59,125	70,924
(Gain)/loss on securities	(441)	(212,896)	(109)
Provision/(benefit) for deferred income taxes	14,357	103,557	121,001
Stock-based compensation expense	22,730	23,171	20,627
Net (increase)/decrease in interest receivable and other assets	(116,888)	32,950	240,629
Net (decrease)/increase in interest payable and other liabilities	95,200	(3,980)	(16,877)
Total adjustments	377,921	(322,202)	(205,778)
Net cash provided/(used) by operating activities	830,294	234,305	(28,798)
Securities:
Sales and prepayments	191,681	20,751
Sales and prepayments			936,958
Premises and equipment:
Net cash provided/(used) by investing activities	(2,389,842)	480,372	(1,324,602)
Preferred stock:
Cash dividends	(6,200)	(6,200)	(6,200)
Common stock:
Exercise of stock options	9,665	4,482	6,132
Cash dividends	(171,076)	(138,706)	(79,904)
Repurchase of shares	(134,813)	(104,768)	(5,554)
Term borrowings:
Repayment of term borrowings	(405,562)	(69,025)	(147,413)
Net cash provided/(used) by financing activities	1,421,116	(761,398)	1,767,652
Net increase/(decrease) in cash and cash equivalents	(138,432)	(46,721)	414,252
Cash and cash equivalents at beginning of period	1,405,325	1,452,046	1,037,794
Cash and cash equivalents at end of period	1,266,893	1,405,325	1,452,046
Total interest paid	410,883	307,578	140,373
Total taxes paid	70,505	42,817	54,417
Parent Company
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income/(loss) attributable to controlling interest	440,908	545,042	165,515
Less undistributed net income/(loss) of subsidiaries	157,572	169,751	(23,541)
Income/(loss) before undistributed net income of subsidiaries	283,336	375,291	189,056
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities:
Depreciation, amortization, and other	(915)	15	15
(Gain)/loss on securities	(317)	(28)	(109)
Provision/(benefit) for deferred income taxes	3,648	3,212	7,727
Stock-based compensation expense	21,909	22,398	19,625
Net (increase)/decrease in interest receivable and other assets	10,170	18,214	8,605
Net (decrease)/increase in interest payable and other liabilities	17,736	(10,702)	13,172
Total adjustments	52,231	33,109	49,035
Net cash provided/(used) by operating activities	335,567	408,400	238,091
Securities:
Sales and prepayments	1,457	65
Sales and prepayments			318
Premises and equipment:
Sales/(purchases)	19	(43)	7
Return on investment in subsidiary	164	1,597	1,871
Cash paid for business combination, net	0	(39,916)	(126,149)
Net cash provided/(used) by investing activities	1,640	(38,297)	(123,953)
Preferred stock:
Cash dividends	(6,200)	(6,200)	(6,200)
Common stock:
Exercise of stock options	9,665	4,482	6,132
Cash dividends	(171,076)	(138,706)	(79,904)
Repurchase of shares	(134,813)	(104,768)	(5,554)
Term borrowings:
Repayment of term borrowings	0	(45,364)	0
Net cash provided/(used) by financing activities	(302,424)	(290,556)	(85,526)
Net increase/(decrease) in cash and cash equivalents	34,783	79,547	28,612
Cash and cash equivalents at beginning of period	334,485	254,938	226,326
Cash and cash equivalents at end of period	369,268	334,485	254,938
Total interest paid	29,169	29,186	17,321
Total taxes paid	$ 43,418	$ 49,056	$ 23,020