First Horizon (FHN) 10-Q 7 Nov 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	9 Months Ended
	Sep. 30, 2018shares
Document And Entity Information [Abstract]
Entity Registrant Name	FIRST HORIZON NATIONAL CORP
Entity Central Index Key	36,966
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding (in shares)	323,942,816
Trading Symbol	FHN
Entity Emerging Growth Company	false
Entity Small Business	false

CONSOLIDATED CONDENSED STATEMEN

CONSOLIDATED CONDENSED STATEMENTS OF CONDITION - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Assets:
Cash and due from banks		$ 642,051	$ 639,073
Federal funds sold		113,722	87,364
Securities purchased under agreements to resell (Note 15)		687,437	725,609
Total cash and cash equivalents		1,443,210	1,452,046
Interest-bearing cash		531,681	1,185,600
Trading securities		1,930,991	1,416,345
Loans held-for-sale	[1]	725,651	699,377
Securities available-for-sale		4,608,383	5,170,255
Securities held-to-maturity		10,000	10,000
Loans, net of unearned income	[2]	27,350,214	27,658,929
Less: Allowance for loan losses		185,959	189,555
Total net loans		27,164,255	27,469,374
Goodwill		1,409,822	1,386,853
Other intangible assets, net		161,495	184,389
Fixed income receivables		177,802	68,693
Premises and equipment, net (September 30, 2018 and December 31, 2017 include $30.1 million and $53.2 million, respectively, classified as held-for-sale)		506,453	532,251
Other real estate owned (OREO)	[3]	28,628	43,382
Derivative assets (Note 14)		54,476	81,634
Other assets		1,883,077	1,723,189
Total assets		40,635,924	41,423,388
Deposits:
Savings (December 31, 2017 includes $22.6 million classified as held-for-sale)		11,157,023	10,872,665
Time deposits, net (December 31, 2017 includes $8.0 million classified as held-for-sale)		4,056,184	3,322,921
Other interest-bearing deposits		7,768,997	8,401,773
Interest-bearing		22,982,204	22,597,359
Noninterest-bearing (December 31, 2017 includes $4.8 million classified as held-for-sale)		8,025,881	8,023,003
Total deposits		31,008,085	30,620,362
Federal funds purchased		437,474	399,820
Securities sold under agreements to repurchase		678,510	656,602
Trading liabilities		739,694	638,515
Other short-term borrowings		1,069,912	2,626,213
Term borrowings		1,200,134	1,218,097
Fixed income payables		36,939	48,996
Derivative liabilities (Note 14)		170,324	85,061
Other liabilities		552,921	549,234
Total liabilities		35,893,993	36,842,900
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 September 30, 2018 and December 31, 2017)		95,624	95,624
Common stock - $.625 par value (shares authorized - 400,000,000; shares issued - 323,942,816 on September 30, 2018 and 326,736,214 on December 31, 2017)		202,464	204,211
Capital surplus		3,101,102	3,147,613
Undivided profits		1,484,959	1,160,434
Accumulated other comprehensive loss, net		(437,649)	(322,825)
Total First Horizon National Corporation Shareholders’ Equity		4,446,500	4,285,057
Noncontrolling interest		295,431	295,431
Total equity		4,741,931	4,580,488
Total liabilities and equity		$ 40,635,924	$ 41,423,388
[1]	September 30, 2018 and December 31, 2017 include $9.2 million and $11.7 million, respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.
[2]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.
[3]	September 30, 2018 and December 31, 2017 include $11.0 million and $12.2 million, respectively, of foreclosed residential real estate.

CONSOLIDATED CONDENSED STATEM_2

CONSOLIDATED CONDENSED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Premises and equipment held for sale		$ 30,100	$ 53,200
Savings classified as held for sale			22,600
Time deposits held for sale			8,000
Non-interest bearing deposit liabilities held for sale			$ 4,800
Preferred stock, no par value (in dollars per share)		$ 0	$ 0
Preferred stock liquidation preference value (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)		323,942,816	326,736,214
Mortgage loans secured by residential real estate in process of foreclosure	[1]	$ 28,628	$ 43,382
Residential Real Estate
Foreclosed residential real estate		20,800	22,700
Mortgage loans secured by residential real estate in process of foreclosure		11,000	12,200
Residential Real Estate | Loans Held-For-Sale
Foreclosed residential real estate		$ 9,200	$ 11,700
[1]	September 30, 2018 and December 31, 2017 include $11.0 million and $12.2 million, respectively, of foreclosed residential real estate.

CONSOLIDATED CONDENSED STATEM_3

CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans	$ 331,000	$ 205,220	$ 954,467	$ 578,264
Interest on investment securities available-for-sale	32,391	25,575	97,872	76,867
Interest on investment securities held-to-maturity	131	131	394	460
Interest on loans held-for-sale	9,977	6,123	33,349	10,916
Interest on trading securities	14,130	8,262	43,280	24,033
Interest on other earning assets	6,040	2,834	15,473	11,757
Total interest income	393,669	248,145	1,144,835	702,297
Interest on deposits:
Savings	30,022	10,920	70,522	31,324
Time deposits	14,667	2,591	35,428	8,342
Other interest-bearing deposits	14,401	6,759	36,922	15,976
Interest on trading liabilities	5,125	3,298	15,039	11,282
Interest on short-term borrowings	9,762	4,998	29,914	9,293
Interest on term borrowings	13,992	9,762	39,205	25,854
Total interest expense	87,969	38,328	227,030	102,071
Net interest income	305,700	209,817	917,805	600,226
Provision/(provision credit) for loan losses	2,000	0	1,000	(3,000)
Net interest income after provision/(provision credit) for loan losses	303,700	209,817	916,805	603,226
Noninterest income:
Fixed income	44,813	55,758	128,016	161,546
Deposit transactions and cash management	35,792	28,011	107,859	80,434
Brokerage, management fees and commissions	14,200	11,937	41,423	35,872
Trust services and investment management	7,438	6,953	22,847	21,304
Trust services and investment management	6,878	6,170	19,958	17,230
Bank-owned life insurance (BOLI)	4,337	3,539	14,103	11,137
Debt securities gains/(losses), net	0	1	52	450
Equity securities gains/(losses), net (Note 3)	212,859	5	212,924	5
All other income and commissions	22,655	43	65,332	29,051
Total noninterest income	348,972	112,417	612,514	357,029
Adjusted gross income after provision/(provision credit) for loan losses	652,672	322,234	1,529,319	960,255
Noninterest expense:
Employee compensation, incentives, and benefits	164,839	137,383	501,983	410,153
Occupancy	20,002	13,619	62,956	38,759
Computer software	15,693	11,993	45,948	35,077
Operational services	13,121	10,805	43,335	33,204
Equipment rentals, depreciation, and maintenance	9,423	6,626	30,149	20,013
Professional fees	9,270	6,566	36,957	20,971
Advertising and public relations	8,365	5,205	17,034	13,901
FDIC premium expense	7,850	6,062	26,442	17,728
Communications and courier	7,014	4,328	22,776	12,245
Amortization of intangible assets	6,460	1,964	19,394	5,160
Contract employment and outsourcing	4,314	2,762	14,274	8,975
Legal fees	2,541	2,052	7,670	10,831
Repurchase and foreclosure provision/(provision credit)	(562)	(609)	(886)	(22,580)
All other expense	25,701	28,113	112,032	72,554
Total noninterest expense	294,031	236,869	940,064	676,991
Income/(loss) before income taxes	358,641	85,365	589,255	283,264
Provision/(benefit) for income taxes	83,925	13,596	133,553	57,903
Net income/(loss)	274,716	71,769	455,702	225,361
Net income attributable to noncontrolling interest	2,883	2,883	8,555	8,555
Net income/(loss) attributable to controlling interest	271,833	68,886	447,147	216,806
Preferred stock dividends	1,550	1,550	4,650	4,650
Net income/(loss) available to common shareholders	$ 270,283	$ 67,336	$ 442,497	$ 212,156
Basic earnings/(loss) per share (in dollars per share)	$ 0.83	$ 0.29	$ 1.36	$ 0.91
Diluted earnings/(loss) per share (in dollars per share)	$ 0.83	$ 0.28	$ 1.35	$ 0.90
Weighted average common shares (in shares)	324,406	233,749	325,341	233,438
Diluted average common shares (in shares)	327,252	236,340	328,645	236,372
Cash dividends declared per common share (in dollars per share)	$ 0.12	$ 0.09	$ 0.36	$ 0.27

CONSOLIDATED CONDENSED STATEM_4

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017
Statements of Comprehensive Income/(loss)
Net income/(loss)	$ 274,716	$ 71,769	$ 455,702		$ 225,361
Other comprehensive income/(loss), net of tax:
Net unrealized gains/(losses) on securities available-for-sale	(25,924)	3,917	(106,561)		11,292
Net unrealized gains/(losses) on cash flow hedges	(1,746)	(734)	(13,533)		(493)
Net unrealized gains/(losses) on pension and other postretirement plans	2,135	1,895	5,481		4,471
Other comprehensive income/(loss)	(25,535)	5,078	(114,613)	[1]	15,270	[1]
Comprehensive income/(loss)	249,181	76,847	341,089		240,631
Comprehensive income attributable to noncontrolling interest	2,883	2,883	8,555		8,555
Comprehensive income attributable to controlling interest	246,298	73,964	332,534		232,076
Income tax expense/(benefit) of items included in Other comprehensive income:
Net unrealized gains/(losses) on securities available-for-sale	(8,510)	2,430	(34,981)		7,002
Net unrealized gains/(losses) on cash flow hedges	(573)	(455)	(4,443)		(306)
Net unrealized gains/(losses) on pension and other postretirement plans	$ 701	$ 1,175	$ 1,799		$ 2,772
[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.

CONSOLIDATED CONDENSED STATEM_5

CONSOLIDATED CONDENSED STATEMENTS OF EQUITY - USD ($) $ in Thousands		Total	Controlling Interest	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, as adjusted		$ 2,705,084	$ 2,409,653	$ 295,431
Balance, January 1 at Dec. 31, 2016		2,705,084	2,409,653	295,431
Adjustment to reflect adoption of ASU 2017-12 at Dec. 31, 2016		0	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		225,361	216,806	8,555
Other comprehensive income/(loss)	[1]	15,270	15,270	0
Comprehensive income/(loss)		240,631	232,076	8,555
Cash dividends declared:
Preferred stock ($4,650 per share for the nine months ended September 30, 2018 and 2017)		(4,650)	(4,650)	0
Common stock ($.36 and $.27 per share for the nine months ended September 30, 2018 and 2017, respectively)		(63,777)	(63,777)	0
Common stock repurchased	[2]	(5,285)	(5,285)	0
Common stock issued for:
Stock options and restricted stock - equity awards		5,132	5,132	0
Acquisition equity adjustment	[3]	0	0	0
Stock-based compensation expense		14,971	14,971	0
Dividends declared - noncontrolling interest of subsidiary preferred stock		(8,555)	0	(8,555)
Other		0	0	0
Balance, September 30 at Sep. 30, 2017		2,883,551	2,588,120	295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		71,769
Other comprehensive income/(loss)		5,078
Comprehensive income/(loss)		76,847
Cash dividends declared:
Preferred stock ($4,650 per share for the nine months ended September 30, 2018 and 2017)		(1,550)
Balance, September 30 at Sep. 30, 2017		2,883,551	2,588,120	295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, as adjusted		4,580,555	4,285,124	295,431
Balance, January 1 at Dec. 31, 2017		4,580,488	4,285,057	295,431
Adjustment to reflect adoption of ASU 2017-12 at Dec. 31, 2017		67	67	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		455,702	447,147	8,555
Other comprehensive income/(loss)	[1]	(114,613)	(114,613)	0
Comprehensive income/(loss)		341,089	332,534	8,555
Cash dividends declared:
Preferred stock ($4,650 per share for the nine months ended September 30, 2018 and 2017)		(4,650)	(4,650)	0
Common stock ($.36 and $.27 per share for the nine months ended September 30, 2018 and 2017, respectively)		(118,250)	(118,250)	0
Common stock repurchased	[2]	(23,997)	(23,997)	0
Common stock issued for:
Stock options and restricted stock - equity awards		4,442	4,442	0
Acquisition equity adjustment	[3]	(46,035)	(46,035)	0
Stock-based compensation expense		17,465	17,465	0
Dividends declared - noncontrolling interest of subsidiary preferred stock		(8,555)	0	(8,555)
Other		(133)	(133)	0
Balance, September 30 at Sep. 30, 2018		4,741,931	4,446,500	295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		274,716
Other comprehensive income/(loss)		(25,535)
Comprehensive income/(loss)		249,181
Cash dividends declared:
Preferred stock ($4,650 per share for the nine months ended September 30, 2018 and 2017)		(1,550)
Balance, September 30 at Sep. 30, 2018		$ 4,741,931	$ 4,446,500	$ 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]	2018 includes $19.0 million repurchased under share repurchase programs.
[3]	See Note 2- Acquisitions and Divestitures for additional information.

CONSOLIDATED CONDENSED STATEM_6

CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]
Preferred stock - cash dividends declared per share (in dollars per share)	$ 4,650	$ 4,650
Common stock - cash dividends declared per share (in dollars per share)	$ 0.36	$ 0.27
First Horizon Share Repurchase Program
Common stock repurchased under share repurchase programs	$ 19

CONSOLIDATED CONDENSED STATEM_7

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net income/(loss)		$ 455,702	$ 225,361
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities:
Provision/(provision credit) for loan losses		1,000	(3,000)
Provision/(benefit) for deferred income taxes		106,314	(547)
Depreciation and amortization of premises and equipment		35,700	25,052
Amortization of intangible assets		19,394	5,160
Net other amortization and accretion		(9,991)	22,921
Net (increase)/decrease in derivatives		86,135	(14,670)
Fair value adjustment on interest-only strips		(840)	(107)
Repurchase and foreclosure provision/(provision credit)		0	(20,000)
(Gains)/losses and write-downs on OREO, net		814	44
Litigation and regulatory matters		(1,447)	7,409
Stock-based compensation expense		17,465	14,971
Gain on sale of held-to-maturity loans		3,777	0
Equity securities (gains)/losses, net		(212,924)	(5)
Debt securities (gains)/losses, net		(52)	(450)
(Gain)/loss on extinguishment of debt		1	14,329
Net (gains)/losses on sale/disposal of fixed assets		(2,469)	(13)
(Gain)/loss on BOLI		(2,785)	(3,500)
Loans held-for-sale:
Purchases and originations		(1,729,549)	(1,252,300)
Gross proceeds from settlements and sales	[1]	751,589	1,252,477
(Gain)/loss due to fair value adjustments and other		13,755	2,485
Net (increase)/decrease in:
Trading securities		392,411	(433,897)
Fixed income receivables		(109,109)	(11,339)
Interest receivable		(14,052)	(7,171)
Other assets		(6,699)	(51,575)
Net increase/(decrease) in:
Trading liabilities		101,179	17,180
Fixed income payables		(12,057)	(73,187)
Interest payable		16,610	8,869
Other liabilities		(30,717)	(35,770)
Total adjustments		(586,547)	(536,634)
Net cash provided/(used) by operating activities		(130,845)	(311,273)
Available-for-sale securities:
Sales		15,137	3,360
Maturities		510,232	420,136
Purchases		(362,215)	(426,129)
Held-to-maturity securities:
Prepayments and maturities		0	4,740
Premises and equipment:
Sales		22,794	2,577
Purchases		(32,928)	(30,395)
Proceeds from the sale of Visa Class B shares		240,206	0
Proceeds from sales of OREO		25,328	9,235
Proceeds from sales of loans classified as held-to-maturity		50,498	0
Proceeds from BOLI		11,559	5,850
Net (increase)/decrease in:
Loans		283,922	(586,426)
Interests retained from securitizations classified as trading securities		731	648
Interest-bearing cash		653,919	459,840
Cash paid related to divestitures		(27,599)	0
Cash (paid)/received for acquisition, net	[2]	(46,017)	(123,971)
Net cash provided/(used) by investing activities		1,345,567	(260,535)
Common stock:
Stock options exercised		4,443	5,173
Cash dividends paid		(99,753)	(58,850)
Repurchase of shares	[3]	(23,997)	(5,285)
Cash dividends paid - preferred stock - noncontrolling interest		(8,555)	(8,523)
Cash dividends paid - Series A preferred stock		(4,650)	(4,650)
Term borrowings:
Issuance		0	121,184
Payments/maturities		(17,565)	(145,285)
Increases in restricted and secured term borrowings		5,646	29,231
Net increase/(decrease) in:
Deposits		417,612	(572,621)
Short-term borrowings		(1,496,739)	1,261,395
Net cash provided/(used) by financing activities		(1,223,558)	621,769
Net increase/(decrease) in cash and cash equivalents		(8,836)	49,961
Cash and cash equivalents at beginning of period		1,452,046	1,037,794
Cash and cash equivalents at end of period		1,443,210	1,087,755
Supplemental Disclosures
Total interest paid		208,160	92,405
Total taxes paid		12,779	38,151
Total taxes refunded		1,576	8,201
Transfer from loans to OREO		11,388	5,564
Transfer from loans HFS to trading securities		$ 907,788	$ 829,668
[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.
[2]	See Note 2- Acquisitions and Divestitures for additional information.
[3]	2018 includes $19.0 million repurchased under share repurchase programs.

CONSOLIDATED CONDENSED STATEM_8

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Gross proceeds from settlements and sales	$ 751,589	[1]
Repurchase of shares	23,997	[2]
Portion of Sub-prime Auto Loan Portfolios
Gross proceeds from settlements and sales	107,400	[1]
Loans disposed of	120,000
First Horizon Share Repurchase Program
Repurchase of shares	$ 19,000	[2]
[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.
[2]	2018 includes $19.0 million repurchased under share repurchase programs.

Financial Information

Financial Information	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Information	Financial Information Basis of Accounting. The unaudited interim consolidated condensed 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. In the opinion of management, all necessary adjustments have been made for a fair presentation of financial position and results of operations for the periods presented. These adjustments are of a normal recurring nature unless otherwise disclosed in this Quarterly Report on Form 10-Q. The operating results for the interim 2018 period are not necessarily indicative of the results that may be expected going forward. For further information, refer to the audited consolidated financial statements in Exhibit 13 to FHN’s Annual Report on Form 10-K for the year ended December 31, 2017. 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 September 30, 2018, accounts receivable related to products and services on non-interest income were $9.0 million . For the three and nine months ended September 30, 2018, 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 Condensed Statement of Condition as of September 30, 2018. Transaction Price Allocated to Remaining Performance Obligations. For the three and nine months ended September 30, 2018, 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 12 - 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 16 - 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 were classified as AFS through December 31, 2017. Subsequently, all equity securities are classified in Other assets. National banks chartered by the federal government are, by law, 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. 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. Summary of Accounting Changes. Effective January 1, 2018, FHN adopted the provisions of ASU 2014-09, “Revenue from Contracts with Customers,” and all related amendments to all contracts using a modified retrospective transaction method. ASU 2014-09 does not change revenue recognition for financial assets. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This is accomplished through a five-step recognition framework involving 1) the identification of contracts with customers, 2) identification of performance obligations, 3) determination of the transaction price, 4) allocation of the transaction price to the performance obligations and 5) recognition of revenue as performance obligations are satisfied. Additionally, qualitative and quantitative information is required for disclosure regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In February 2016, the FASB issued ASU 2016-08, “Principal versus Agent Considerations,” which provides additional guidance on whether an entity should recognize revenue on a gross or net basis, based on which party controls the specified good or service before that good or service is transferred to a customer. In April 2016, the FASB issued ASU 2016-10, “Identifying Performance Obligations and Licensing,” which clarifies the original guidance included in ASU 2014-09 for identification of the goods or services provided to customers and enhances the implementation guidance for licensing arrangements. ASU 2016-12, “Narrow-Scope Improvements and Practical Expedients,” was issued in May 2016 to provide additional guidance for the implementation and application of ASU 2014-09. “Technical Corrections and Improvements” ASU 2016-20 was issued in December 2016 and provides further guidance on certain issues. FHN elected to adopt the provisions of the revenue recognition standards through the cumulative effect alternative and determined that there were no significant effects on the timing of recognition, which resulted in no cumulative effect adjustment being required. Beginning in first quarter 2018, in situations where FHN's broker-dealer operations serve as the lead underwriter, the associated revenues and expenses are presented gross. The effect on 2018 revenues and expenses is not expected to be significant. Effective January 1, 2018, FHN adopted the provisions of ASU 2017-05, “Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” through the cumulative effect approach. ASU 2017-05 clarifies the meaning and application of the term "in substance nonfinancial asset" in transactions involving both financial and nonfinancial assets. If substantially all of the fair value of the assets that are promised to the counterparty in a contract are concentrated in nonfinancial assets, then all of the financial assets promised to the counterparty are in substance nonfinancial assets within the scope of revenue recognition guidance for nonfinancial assets. ASU 2017-05 also clarifies that an entity should identify each distinct nonfinancial asset or in substance nonfinancial asset promised to a counterparty and derecognize each asset when a counterparty obtains control of it with the amount of revenue recognized based on the allocation guidance provided in ASU 2014-09. ASU 2017-05 also requires an entity to derecognize a distinct nonfinancial asset or distinct in substance nonfinancial asset in a partial sale transaction when it 1) does not have (or ceases to have) a controlling financial interest in the legal entity that holds the asset in accordance with Topic 810 and 2) transfers control of the asset in accordance with the provisions of ASU 2014-09. Once an entity transfers control of a distinct nonfinancial asset or distinct in substance nonfinancial asset, it is required to measure any noncontrolling interest it receives (or retains) at fair value. FHN determined that there were no significant effects on the timing of revenue recognition, which resulted in no cumulative effect adjustment being required. Effective January 1, 2018, FHN adopted the provisions of ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 makes several revisions to the accounting, presentation and disclosure for financial instruments. Equity investments (except those accounted for under the equity method, those that result in consolidation of the investee, and those held by entities subject to specialized industry accounting which already apply fair value through earnings) are required to be measured at fair value with changes in fair value recognized in net income. This excludes FRB and FHLB stock holdings which are specifically exempted from the provisions of ASU 2016-01. An entity may elect to measure equity investments that do not have readily determinable market values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar instruments from the same issuer. ASU 2016-01 also requires a qualitative impairment review for equity investments without readily determinable fair values, with measurement at fair value required if impairment is determined to exist. For liabilities for which fair value has been elected, ASU 2016-01 revises current accounting to record the portion of fair value changes resulting from instrument-specific credit risk within other comprehensive income rather than earnings. FHN has not elected fair value accounting for any existing financial liabilities. Additionally, ASU 2016-01 clarifies that the need for a valuation allowance on a deferred tax asset related to available-for-sale securities should be assessed in combination with all other deferred tax assets rather than being assessed in isolation. ASU 2016-01 also makes several changes to existing fair value presentation and disclosure requirements, including a provision that all disclosures must use an exit price concept in the determination of fair value. Transition is through a cumulative effect adjustment to retained earnings for equity investments with readily determinable fair values. Equity investments without readily determinable fair values, for which the accounting election is made, will have any initial fair value marks recorded through earnings prospectively after adoption. Upon adoption, FHN reclassified $265.9 million of equity investments out of AFS securities to Other assets, leaving only debt securities within the AFS classification. FHN evaluated the nature of its current equity investments (excluding FRB and FHLB stock holdings which are specifically exempted from the provisions of ASU 2016-01) and determined that substantially all qualified for the election available to assets without readily determinable fair values. Accordingly, FHN has applied this election and any future fair value marks for these investments will be recognized through earnings on a prospective basis subsequent to adoption. The requirements of ASU 2016-01 related to assessment of deferred tax assets and disclosure of the fair value of financial instruments did not have a significant effect on FHN because its current accounting and disclosure practices conform to the requirements of ASU 2016-01. Effective January 1, 2018, FHN adopted the provisions of ASU 2016-04, “Recognition of Breakage of Certain Prepaid Stored-Value Products,” which indicates that liabilities related to the sale of prepaid stored-value products are considered financial liabilities and should have a breakage estimate applied for estimated unused funds. ASU 2016-04 does not apply to stored-value products that can only be redeemed for cash, are subject to escheatment or are linked to a segregated bank account. The adoption of ASU 2016-04 did not have a significant effect on FHN’s current accounting and disclosure practices. Effective January 1, 2018, FHN adopted the provisions of ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which clarifies multiple cash flow presentation issues including providing guidance as to classification on the cash flow statement for certain cash receipts and cash payments where diversity in practice exists. The adoption of ASU 2016-15 was applied retroactively resulting in proceeds from bank-owned life insurance (“BOLI”) being classified as an investing activity rather than their prior classification as an operating activity. All of these amounts are included in Other assets in the Consolidated Condensed Statement of Condition. The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 (Dollars in thousands) 2017 2016 2015 Proceeds from BOLI $ 160 $ 5,850 $ 11,440 $ 2,740 $ 2,425 Effective January 1, 2018, FHN retroactively adopted the provisions of ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires the disaggregation of the service cost component from the other components of net benefit cost for pension and postretirement plans. Service cost must be included in the same income statement line item as other compensation-related expenses. All other components of net benefit cost are required to be presented in the income statement separately from the service cost component, with disclosure of the line items where these amounts are recorded. FHN’s disclosures for pension and postretirement costs provide details of the service cost and all other components for expenses recognized for its applicable benefit plans. All of these amounts were previously included in Employee compensation, incentives, and benefits expense in the Consolidated Condensed Statements of Income. Upon adoption of ASU 2017-07 FHN reclassified the expense components other than service cost into All other expense and revised its disclosures accordingly. The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 ( Dollars in thousands ) 2017 2016 2015 Net periodic benefit cost reclassified $ 415 $ 1,665 $ 1,946 $ (843 ) $ (1,168 ) Effective January 1, 2018, FHN early adopted the provisions of ASU 2017-08, “Premium Amortization on Purchased Callable Debt Securities,” which shortens the amortization period for securities that have explicit, noncontingent call features that are callable at fixed prices and on preset dates. In contrast to the current requirement for premium amortization to extend to the contractual maturity date, ASU 2017-08 requires the premium to be amortized to the earliest call date. ASU 2017-08 does not change the amortization of discounts, which will continue to be amortized to maturity. The new guidance does not apply to either 1) debt securities where the prepayment date is not preset or the price is not known in advance or 2) debt securities that qualify for amortization based on estimated prepayment rates. The adoption of ASU 2017-08 did not have an effect on FHN's current investments. Effective January 1, 2018, FHN early adopted the provisions of ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities,” which revises the financial reporting for hedging relationships through changes to both the designation and measurement requirements for qualifying hedge relationships and the presentation of hedge results. ASU 2017-12 expands permissible risk component hedging strategies, including the designation of a contractually specified interest rate (e.g., a bank’s prime rate) in hedges of cash flows from variable rate financial instruments. Additionally, ASU 2017-12 makes significant revisions to fair value hedging activities, including the ability to measure the fair value changes for a hedged item solely for changes in the benchmark interest rate, permitting partial-term hedges, limiting consideration of prepayment risk for hedged debt instruments solely to the effects of changes in the benchmark interest rate and allowing for certain hedging strategies to be applied to closed portfolios of prepayable debt instruments. ASU 2017-12 also provides elections for the exclusion of certain portions of a hedging instrument’s change in fair value from the assessment of hedge effectiveness. If elected, the fair value changes of these excluded components may be recognized immediately or recorded into other comprehensive income with recycling into earnings using a rational and systematic methodology over the life of the hedging instrument. Under ASU 2017-12 some of the documentation requirements for hedge accounting relationships are relaxed, but the highly effective threshold has been retained. Hedge designation documentation and a prospective qualitative assessment are still required at hedge inception, but the initial quantitative analysis may be delayed until the end of the quarter the hedge is commenced. If certain criteria are met, an election can be made to perform future effectiveness assessments using a purely qualitative methodology. ASU 2017-12 also revises the income statement presentation requirements for hedging activities. 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 income statement line item 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. ASU 2017-12 also makes revisions to the current disclosure requirements for hedging activities to reflect the presentation of hedging results consistent with the changes to income statement classification and to improve the disclosure of the hedging results on the balance sheet. FHN early adopted the provisions of ASU 2017-12 in the first quarter of 2018. Prospectively, FHN is recording components of hedging results for its fair value and cash flow hedges previously recognized in other expense within either interest income or interest expense. Additionally, FHN made cumulative effect adjustments to the hedged items, accumulated other comprehensive income and retained earnings as of the beginning of 2018. The magnitude of the cumulative effect adjustments and prospective effects were insignificant for FHN’s hedge relationships. Accounting Changes Issued but Not Currently Effective In February 2016, the FASB issued 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. In July 2018, the FASB issued 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. ASU 2016-02 and ASU 2018-11 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. FHN continues to evaluate the impact of ASU 2016-02 on its current accounting and disclosure practices. Upon adoption, FHN intends to utilize the cumulative effect transition alternative provided by ASU 2018-11. FHN also intends to utilize the lease classification practical expedients and the short-term lease exemption upon adoption. FHN currently estimates that adoption of ASU 2016-02 will result in recognition of lease assets of approximately $185 million and lease liabilities of approximately $195 million along with smaller impacts to other balance sheet classifications as well as an after-tax increase in retained earnings of approximately $3 million , primarily reflecting the recognition of deferred gains associated with prior sale-leaseback transactions. Since FHN will elect to determine the discount rate on leases as of the effective date and will also elect to use hindsight in determining remaining lease terms as well as impairments of lease assets resulting from lease abandonments upon adoption, this amount may change based on revisions to the inputs used in calculating this estimated adoption effect. 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. 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. 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 adjusted to reflect the addition 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. Early adoption is permitted in fiscal years beginning after December 15, 2018. FHN continues to evaluate the impact of ASU 2016-13. FHN has met with industry experts, initiated training for key employees associated with the new standard, and defined an initial approach that it is currently testing. FHN has begun developing the formal models and processes that will be required to implement the new standard. In August 2018, the FASB issued ASU 2018-13, “ Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement,” which makes multiple revisions to current disclosures requirements for fair value measurements. ASU 2018-13 removes the disclosure requirements for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for the timing of recognition for transfers between fair value levels and the discussion of valuation processes for Level 3 measurements. Additional disclosure is required for unrealized gains and losses recognized with accumulated other comprehensive income and the weighted average and range of unobservable inputs used in Level 3 measurements. ASU 2

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures 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 . The final appraisal or settlement amount, as applicable, may differ from current estimates. 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 $9.9 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 (9,085 ) 124,918 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 (2,351 ) 231,001 OREO 43,077 (9,149 ) (315 ) 33,613 Other assets 617,232 41,320 (c) (7,248 ) (c) 651,304 Total assets acquired $ 10,068,908 $ (190,204 ) $ (20,725 ) $ 9,857,979 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 2,908 67,194 Total liabilities assumed 8,738,129 71,125 2,266 8,811,520 Net assets acquired $ 1,330,779 $ (261,329 ) $ (22,991 ) 1,046,459 Consideration paid: Equity (1,746,724 ) Cash (469,609 ) Total consideration paid (2,216,333 ) Goodwill $ 1,169,874 (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 Condensed Statement of Condition as of September 30, 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. Due to the timing of merger completion in relation to the previous year end, the fact that back office functions (including loan and deposit processing) have only recently been integrated, the evaluation of post-merger activity, and the extended information gathering and management review processes required to properly record acquired assets and liabilities, FHN considers its valuations of CBF's loans, loans held-for-sale, premises and equipment, other assets, tax receivables and payables, lease intangibles, other liabilities and acquired contingencies to be provisional as management continues to identify and assess information regarding the nature of these assets and liabilities and reviews the associated valuation assumptions and methodologies. Accordingly, the amounts recorded for current and deferred tax assets and liabilities are also considered provisional as FHN continues to evaluate the nature and extent of temporary (timing) and permanent differences between the book and tax bases of the acquired assets and liabilities assumed. Additionally, the accounting policies of both FHN and CBF are in the process of being reviewed in detail. Upon completion of such review, conforming adjustments or financial statement reclassification may be determined. In relation to the acquisition, FHN has recorded preliminary goodwill of approximately $1.2 billion , representing the excess of acquisition consideration over the estimated fair value of net assets acquired. 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 three and nine months ended September 30, 2018 and 2017 are presented in the table below: Three Months Ended September 30 Nine Months Ended September 30 (Dollars in thousands) 2018 2017 2018 2017 Professional fees (a) $ 4,594 $ 3,492 $ 19,215 $ 8,004 Employee compensation, incentives and benefits (b) 1,965 232 8,459 232 Contract employment and outsourcing (c) 599 351 3,702 351 Occupancy (d) 100 15 2,321 15 Miscellaneous expense (e) 1,384 130 6,522 234 All other expense (f) 1,548 2,771 41,833 2,786 Total $ 10,190 $ 6,991 $ 82,052 $ 11,622 (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. On March 23, 2018, FHN divested two branches, including approximately $30 million of deposits and $2 million of loans, to Apex Bank, a Tennessee banking corporation. 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. On April 3, 2017, FTN Financial 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 FTN Financial’s existing SBA trading activities, have established an additional major product sector for FTN Financial. In relation to the acquisition, FTN Financial acquired approximately $418 million in assets, inclusive of approximately $236 million of HFS loans and $139 million of trading securities, and assumed approximately $202 million of securities sold under agreements to repurchase and $96 million of fixed income payables. 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. See Note 2- Acquisitions and Divestitures in the Notes to Consolidated Financial Statements on Form 10-K for the year ended December 31, 2017, for additional information about the CBF and Coastal acquisitions. 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.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following tables summarize FHN’s investment securities on September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale: U.S. treasuries $ 100 $ — $ (2 ) $ 98 Government agency issued mortgage-backed securities (“MBS”) 2,504,101 2,987 (92,211 ) 2,414,877 Government agency issued collateralized mortgage obligations (“CMO”) 2,077,326 216 (86,358 ) 1,991,184 Other U.S. government agencies 114,053 — (965 ) 113,088 Corporates and other debt 55,495 270 (691 ) 55,074 States and municipalities 24,151 — (450 ) 23,701 $ 4,775,226 $ 3,473 $ (180,677 ) 4,598,022 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (a) 10,361 Total securities available-for-sale (b) $ 4,608,383 Securities held-to-maturity: Corporates and other debt $ 10,000 $ — $ (244 ) $ 9,756 Total securities held-to-maturity $ 10,000 $ — $ (244 ) $ 9,756 (a) SBA-interest only strips are recorded at elected fair value. See Note 16 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.6 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. December 31, 2017 (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale: U.S. treasuries $ 100 $ — $ (1 ) $ 99 Government agency issued MBS 2,580,442 10,538 (13,604 ) 2,577,376 Government agency issued CMO 2,302,439 1,691 (34,272 ) 2,269,858 Corporates and other debt 55,799 23 (40 ) 55,782 Equity and other (a) 265,863 7 — 265,870 $ 5,204,643 $ 12,259 $ (47,917 ) 5,168,985 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (b) 1,270 Total securities available-for-sale (c) $ 5,170,255 Securities held-to-maturity: Corporates and other debt $ 10,000 $ — $ (99 ) $ 9,901 Total securities held-to-maturity $ 10,000 $ — $ (99 ) $ 9,901 (a) Includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $134.6 million . The remainder is money market, mutual funds, and cost method investments. Equity investments were reclassified to Other assets upon adoption of ASU 2016-01 on January 1, 2018. (b) SBA-interest only strips are recorded at elected fair value. See Note 16 - Fair Value of Assets and Liabilities for additional information. (c) Includes $4.0 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 September 30, 2018 are provided below: Held-to-Maturity Available-for-Sale (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Within 1 year $ — $ — $ 15,188 $ 15,025 After 1 year; within 5 years — — 154,460 153,261 After 5 years; within 10 years 10,000 9,756 — 3,741 After 10 years — — 24,151 30,295 Subtotal 10,000 9,756 193,799 202,322 Government agency issued MBS and CMO (a) — — 4,581,427 4,406,061 Total $ 10,000 $ 9,756 $ 4,775,226 $ 4,608,383 (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 three and nine months ended September 30 , 2018. Equity securities are included for periods prior to 2018. Three Months Ended Nine Months Ended September 30 (Dollars in thousands) 2018 2017 2018 2017 Gross gains on sales of securities $ — $ 6 $ 52 $ 455 Gross (losses) on sales of securities — — — — Net gain/(loss) on sales of securities (a) (b) $ — $ 6 $ 52 $ 455 (a) Cash proceeds from the sale of available-for-sale securities for the three and nine months ended September 30, 2018 and 2017 were not material. (b) Nine months ended September 30, 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 September 30, 2018 and December 31, 2017 : As of September 30, 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 1,500,317 (52,607 ) 732,470 (39,604 ) 2,232,787 (92,211 ) Government agency issued CMO 1,000,444 (28,664 ) 963,763 (57,694 ) 1,964,207 (86,358 ) Other U.S. government agencies 113,088 (965 ) — — 113,088 (965 ) Corporates and other debt 40,024 (691 ) — — 40,024 (691 ) States and municipalities 23,701 (450 ) — — 23,701 (450 ) Total temporarily impaired securities $ 2,677,574 $ (83,377 ) $ 1,696,331 $ (97,300 ) $ 4,373,905 $ (180,677 ) As of December 31, 2017 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 $ 99 $ (1 ) $ — $ — $ 99 $ (1 ) Government agency issued MBS 1,455,476 (4,738 ) 331,900 (8,866 ) 1,787,376 (13,604 ) Government agency issued CMO 1,043,987 (7,464 ) 832,173 (26,808 ) 1,876,160 (34,272 ) Corporates and other debt 15,294 (40 ) — — 15,294 (40 ) Total temporarily impaired securities $ 2,514,856 $ (12,243 ) $ 1,164,073 $ (35,674 ) $ 3,678,929 $ (47,917 ) 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 $21.6 million and $16.3 million at September 30, 2018 and January 1, 2018, respectively. The year-to-date 2018 gross amounts of upward and downward valuation adjustments were not significant. Unrealized gains of $1.0 million and $2.1 million were recognized in the three and nine months ended September 30, 2018, respectively, for equity investments with readily determinable fair values. In third quarter 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 Visa Matters section of Note 10 - Contingencies and Other Disclosures and Other Derivatives section of Note 14 - Derivatives for more information regarding FHN’s Visa shares.

Loans

Loans	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans	Loans The following table provides the balance of loans, net of unearned income, by portfolio segment as of September 30, 2018 and December 31, 2017 : September 30 December 31 (Dollars in thousands) 2018 2017 Commercial: Commercial, financial, and industrial $ 16,044,145 $ 16,057,273 Commercial real estate 4,237,036 4,214,695 Consumer: Consumer real estate (a) 6,191,183 6,367,755 Permanent mortgage 347,054 399,307 Credit card & other 530,796 619,899 Loans, net of unearned income $ 27,350,214 $ 27,658,929 Allowance for loan losses 185,959 189,555 Total net loans $ 27,164,255 $ 27,469,374 (a) Balances as of September 30, 2018 and December 31, 2017 , include $17.1 million and $24.2 million of restricted real estate loans, respectively. See Note 13—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. 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 ( 24 percent of total loans), the majority of which is in the consumer real estate segment ( 23 percent of total loans). Loans to finance and insurance companies total $2.7 billion ( 17 percent of the C&I portfolio, or 10 percent of the total loans). FHN had loans to mortgage companies totaling $2.1 billion ( 13 percent of the C&I segment, or 8 percent of total loans) as of September 30, 2018 . As a result, 30 percent of the C&I segment is sensitive to impacts on the financial services industry. Purchased Credit-Impaired Loans The following table presents a rollforward of the accretable yield for the three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Balance, beginning of period $ 14,474 $ 4,045 $ 15,623 $ 6,871 Accretion (2,183 ) (642 ) (6,927 ) (2,412 ) Adjustment for payoffs (840 ) (198 ) (2,559 ) (1,232 ) Adjustment for charge-offs (122 ) — (1,046 ) — Adjustment for pool excess recovery (a) (123 ) — (123 ) (222 ) Increase/(decrease) in accretable yield (b) 4,062 (2 ) 10,721 112 Disposals — — (240 ) — Other — — (181 ) 86 Balance, end of period $ 15,268 $ 3,203 $ 15,268 $ 3,203 (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 and amounts of the cash flows. At September 30, 2018 , the ALLL related to PCI loans was $3.4 million compared to $3.2 million at December 31, 2017 . A loan loss provision expense related to PCI loans of $.9 million was recognized during the three months ended September 30, 2018 , as compared to a loan loss provision expense of $2.6 million recognized during the three months ended September 30, 2017 . A loan loss provision expense related to PCI loans of $3.5 million was recognized during the nine months ended September 30, 2018 , as compared to a loan loss provision expense of $2.4 million recognized during the nine months ended September 30, 2017 . The following table reflects the outstanding principal balance and carrying amounts of the acquired PCI loans as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (Dollars in thousands) Carrying value Unpaid balance Carrying value Unpaid balance Commercial, financial and industrial $ 47,841 $ 53,265 $ 96,598 $ 109,280 Commercial real estate 23,174 26,970 36,107 41,488 Consumer real estate 33,203 37,900 38,176 42,568 Credit card and other 2,229 2,545 5,500 6,351 Total $ 106,447 $ 120,680 $ 176,381 $ 199,687 Impaired Loans The following tables provide information at September 30, 2018 and December 31, 2017 , 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. September 30, 2018 December 31, 2017 (Dollars in thousands) Recorded Unpaid Related Recorded Unpaid Related Impaired loans with no related allowance recorded: Commercial: General C&I $ 21,555 $ 21,910 $ — $ 8,183 $ 17,372 $ — Income CRE 1,611 1,611 — — — — Residential CRE 495 963 — — — — Total $ 23,661 $ 24,484 $ — $ 8,183 $ 17,372 $ — Consumer: HELOC (a) $ 7,874 $ 15,869 $ — $ 9,258 $ 19,193 $ — R/E installment loans (a) 5,891 6,518 — 4,093 4,663 — Permanent mortgage (a) 3,703 6,043 — 5,132 7,688 — Total $ 17,468 $ 28,430 $ — $ 18,483 $ 31,544 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 29,058 $ 29,058 $ 5,103 $ 31,774 $ 38,256 $ 5,119 TRUPs 2,936 3,700 925 3,067 3,700 925 Income CRE 397 397 — 1,612 1,612 49 Residential CRE — — — 795 1,263 83 Total $ 32,391 $ 33,155 $ 6,028 $ 37,248 $ 44,831 $ 6,176 Consumer: HELOC $ 67,086 $ 70,168 $ 11,136 $ 72,469 $ 75,207 $ 14,382 R/E installment loans 38,878 39,581 6,940 43,075 43,827 8,793 Permanent mortgage 71,130 81,971 9,996 79,662 90,934 12,105 Credit card & other 552 552 293 593 593 311 Total $ 177,646 $ 192,272 $ 28,365 $ 195,799 $ 210,561 $ 35,591 Total commercial $ 56,052 $ 57,639 $ 6,028 $ 45,431 $ 62,203 $ 6,176 Total consumer $ 195,114 $ 220,702 $ 28,365 $ 214,282 $ 242,105 $ 35,591 Total impaired loans $ 251,166 $ 278,341 $ 34,393 $ 259,713 $ 304,308 $ 41,767 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance. Three Months Ended September 30 Nine months ended September 30 2018 2017 2018 2017 (Dollars in thousands) Average Interest Average Interest Average Interest Average Interest Impaired loans with no related allowance recorded: Commercial: General C&I $ 23,740 $ 203 $ 5,771 $ — $ 21,506 $ 561 $ 8,706 $ — Income CRE 1,680 12 — — 1,379 37 — — Residential CRE 500 — — — 416 — — — Total $ 25,920 $ 215 $ 5,771 $ — $ 23,301 $ 598 $ 8,706 $ — Consumer: HELOC (a) $ 8,343 $ — $ 10,225 $ — $ 8,878 $ — $ 10,536 $ — R/E installment loans (a) 4,631 — 4,182 — 4,032 — 4,014 — Permanent mortgage (a) 3,949 — 5,693 — 4,638 — 5,701 — Total $ 16,923 $ — $ 20,100 $ — $ 17,548 $ — $ 20,251 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 16,375 $ — $ 26,144 $ 193 $ 16,038 $ — $ 29,136 $ 597 TRUPs 2,960 — 3,117 — 3,004 — 3,157 — Income CRE 199 5 1,628 11 335 5 1,737 39 Residential CRE — — 1,044 — 133 — 1,210 10 Total $ 19,534 $ 5 $ 31,933 $ 204 $ 19,510 $ 5 $ 35,240 $ 646 Consumer: HELOC $ 68,913 $ 556 $ 74,894 $ 554 $ 70,452 $ 1,711 $ 78,859 $ 1,695 R/E installment loans 39,147 246 47,628 315 40,512 764 49,634 950 Permanent mortgage 71,898 585 79,305 616 74,617 1,737 82,186 1,805 Credit card & other 578 3 452 3 626 9 351 8 Total $ 180,536 $ 1,390 $ 202,279 $ 1,488 $ 186,207 $ 4,221 $ 211,030 $ 4,458 Total commercial $ 45,454 $ 220 $ 37,704 $ 204 $ 42,811 $ 603 $ 43,946 $ 646 Total consumer $ 197,459 $ 1,390 $ 222,379 $ 1,488 $ 203,755 $ 4,221 $ 231,281 $ 4,458 Total impaired loans $ 242,913 $ 1,610 $ 260,083 $ 1,692 $ 246,566 $ 4,824 $ 275,227 $ 5,104 (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 September 30, 2018 and December 31, 2017 : September 30, 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 $ 600,373 $ — $ — $ 418 $ — $ 600,791 3 % $ 64 2 840,685 — — 2,815 37 843,537 4 261 3 730,939 639,378 — 218,170 82 1,588,569 8 242 4 909,454 456,311 — 543,486 121 1,909,372 9 594 5 1,879,972 257,625 36,620 689,740 8,334 2,872,291 14 8,677 6 1,578,359 450,207 90,297 604,757 36,743 2,760,363 14 8,269 7 2,390,220 98,832 52,927 505,988 16,990 3,064,957 15 15,154 8 1,202,328 84,915 4,068 235,595 15,487 1,542,393 7 20,265 9 1,974,390 105,098 45,117 978,148 75,336 3,178,089 15 20,617 10 459,567 — 18,536 45,560 4,266 527,929 3 9,156 11 283,724 — — 52,546 396 336,666 2 8,033 12 275,015 — — 100,868 5,759 381,642 2 6,636 13 288,183 — 5,786 58,840 73 352,882 2 10,711 14,15,16 181,927 — — 9,986 796 192,709 1 17,596 Collectively evaluated for impairment 13,595,136 2,092,366 253,351 4,046,917 164,420 20,152,190 99 126,275 Individually evaluated for impairment 50,613 — 2,936 2,008 495 56,052 — 6,028 Purchased credit-impaired loans 49,743 — — 19,573 3,623 72,939 1 1,926 Total commercial loans $ 13,695,492 $ 2,092,366 $ 256,287 $ 4,068,498 $ 168,538 $ 20,281,181 100 % $ 134,229 (a) Balances presented net of a $20.5 million valuation allowance. Based on the underlying structure of the notes, the highest possible internal grade was “ 13 ” prior to second quarter 2018. In second quarter 2018, this portfolio was re-graded to align with the scorecard grading methodologies which resulted in upgrades to a majority of this portfolio. 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 Condensed Statement of Income. December 31, 2017 (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 $ 536,244 $ — $ — $ 2,500 $ — $ 538,744 3 % $ 70 2 877,635 — — 1,798 69 879,502 4 339 3 582,224 652,982 — 210,073 40 1,445,319 7 272 4 959,581 629,432 — 309,699 — 1,898,712 9 854 5 1,461,632 328,477 — 415,764 2,474 2,208,347 11 7,355 6 1,668,247 335,169 — 456,706 3,179 2,463,301 12 10,495 7 2,257,400 47,720 — 554,590 9,720 2,869,430 14 13,490 8 1,092,994 35,266 — 241,938 6,454 1,376,652 7 21,831 9 2,633,854 70,915 — 1,630,176 61,475 4,396,420 22 9,804 10 373,537 — — 43,297 4,590 421,424 2 8,808 11 226,382 — — 31,785 2,936 261,103 1 6,784 12 409,838 — — 156,717 6,811 573,366 3 5,882 13 202,613 — 303,848 15,707 268 522,436 3 7,265 14,15,16 228,852 — — 6,587 823 236,262 1 24,400 Collectively evaluated for impairment 13,511,033 2,099,961 303,848 4,077,337 98,839 20,091,018 99 117,649 Individually evaluated for impairment 39,957 — 3,067 1,612 795 45,431 — 6,176 Purchased credit-impaired loans 99,407 — — 31,615 4,497 135,519 1 2,813 Total commercial loans $ 13,650,397 $ 2,099,961 $ 306,915 $ 4,110,564 $ 104,131 $ 20,271,968 100 % $ 126,638 (a) Balances presented net of a $25.5 million valuation allowance. Based on the underlying structure of the notes, the highest possible internal grade was “ 13 ” prior to second quarter 2018. In second quarter 2018, this portfolio was re-graded to align with the scorecard grading methodologies which resulted in upgrades to a majority of this portfolio. 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 September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 HELOC R/E Installment Loans Permanent Mortgage HELOC R/E Installment Loans Permanent Mortgage FICO score 740 or greater 60.8 % 71.1 % 51.2 % 60.0 % 73.1 % 46.4 % FICO score 720-739 8.5 9.0 8.5 8.7 8.0 12.8 FICO score 700-719 8.1 6.6 9.0 8.3 6.4 9.2 FICO score 660-699 10.9 8.0 15.9 11.1 7.2 14.8 FICO score 620-659 5.2 2.8 6.5 4.9 2.8 7.3 FICO score less than 620 (a) 6.5 2.5 8.9 7.0 2.5 9.5 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 September 30, 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 $ 13,597,235 $ 9,202 $ 124 $ 13,606,561 $ 25,713 $ 1,284 $ 12,191 $ 39,188 $ 13,645,749 Loans to mortgage companies 2,092,366 — — 2,092,366 — — — — 2,092,366 TRUPs (a) 253,351 — — 253,351 — — 2,936 2,936 256,287 Purchased credit-impaired loans 35,784 384 13,575 49,743 — — — — 49,743 Total commercial (C&I) 15,978,736 9,586 13,699 16,002,021 25,713 1,284 15,127 42,124 16,044,145 Commercial real estate: Income CRE 4,041,797 6,652 — 4,048,449 35 37 404 476 4,048,925 Residential CRE 164,338 47 — 164,385 35 — 495 530 164,915 Purchased credit-impaired loans 21,373 1,718 105 23,196 — — — — 23,196 Total commercial real estate 4,227,508 8,417 105 4,236,030 70 37 899 1,006 4,237,036 Consumer real estate: HELOC 1,495,298 14,582 8,531 1,518,411 48,400 4,038 7,611 60,049 1,578,460 R/E installment loans 4,541,642 8,589 8,008 4,558,239 15,219 2,239 2,692 20,150 4,578,389 Purchased credit-impaired loans 28,475 2,183 3,676 34,334 — — — — 34,334 Total consumer real estate 6,065,415 25,354 20,215 6,110,984 63,619 6,277 10,303 80,199 6,191,183 Permanent mortgage 315,746 4,051 4,935 324,732 12,217 749 9,356 22,322 347,054 Credit card & other: Credit card 193,681 1,292 1,078 196,051 — — — — 196,051 Other 326,672 4,078 718 331,468 93 78 535 706 332,174 Purchased credit-impaired loans 1,007 835 729 2,571 — — — — 2,571 Total credit card & other 521,360 6,205 2,525 530,090 93 78 535 706 530,796 Total loans, net of unearned income $ 27,108,765 $ 53,613 $ 41,479 $ 27,203,857 $ 101,712 $ 8,425 $ 36,220 $ 146,357 $ 27,350,214 (a) TRUPs is presented net of the valuation allowance of $20.5 million . The following table reflects accruing and non-accruing loans by class on December 31, 2017 : 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 $ 13,514,752 $ 8,057 $ 95 $ 13,522,904 $ 1,761 $ 7,019 $ 19,306 $ 28,086 $ 13,550,990 Loans to mortgage companies 2,099,961 — — 2,099,961 — — — — 2,099,961 TRUPs (a) 303,848 — — 303,848 — — 3,067 3,067 306,915 Purchased credit-impaired loans 77,843 2,207 19,357 99,407 — — — — 99,407 Total commercial (C&I) 15,996,404 10,264 19,452 16,026,120 1,761 7,019 22,373 31,153 16,057,273 Commercial real estate: Income CRE 4,077,106 1,240 — 4,078,346 56 — 546 602 4,078,948 Residential CRE 98,844 — — 98,844 — — 791 791 99,635 Purchased credit-impaired loans 31,173 2,686 2,253 36,112 — — — — 36,112 Total commercial real estate 4,207,123 3,926 2,253 4,213,302 56 — 1,337 1,393 4,214,695 Consumer real estate: HELOC 1,743,776 17,744 9,702 1,771,222 40,508 3,626 8,354 52,488 1,823,710 R/E installment loans 4,475,669 7,274 3,573 4,486,516 14,439 1,957 2,603 18,999 4,505,515 Purchased credit-impaired loans 35,356 2,016 1,158 38,530 — — — — 38,530 Total consumer real estate 6,254,801 27,034 14,433 6,296,268 54,947 5,583 10,957 71,487 6,367,755 Permanent mortgage 365,527 3,930 3,460 372,917 13,245 1,052 12,093 26,390 399,307 Credit card & other: Credit card 193,940 1,371 1,053 196,364 — — — — 196,364 Other 415,070 2,666 103 417,839 31 — 165 196 418,035 Purchased credit-impaired loans 2,993 1,693 814 5,500 — — — — 5,500 Total credit card & other 612,003 5,730 1,970 619,703 31 — 165 196 619,899 Total loans, net of unearned income $ 27,435,858 $ 50,884 $ 41,568 $ 27,528,310 $ 70,040 $ 13,654 $ 46,925 $ 130,619 $ 27,658,929 (a) TRUPs is presented net of the valuation allowance of $25.5 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 September 30, 2018 and December 31, 2017 , FHN had $236.5 million and $234.4 million of portfolio loans classified as TDRs, respectively. For TDRs in the loan portfolio, FHN had loan loss reserves of $28.4 million , or 12 percent as of September 30, 2018 , and $37.3 million , or 16 percent as of December 31, 2017 . Additionally, $57.9 million and $63.2 million of loans held-for-sale as of September 30, 2018 and December 31, 2017 , respectively, were classified as TDRs. The following tables reflect portfolio loans that were classified as TDRs during the three and nine months ended September 30, 2018 and 2017 : Three Months Ended September 30, 2018 Nine Months Ended September 30, 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 1 $ 25,591 $ 25,439 9 $ 27,639 $ 27,190 Total commercial (C&I) 1 25,591 25,439 9 27,639 27,190 Commercial real estate: Income CRE 1 442 442 4 643 637 Total commercial real estate 1 442 442 4 643 637 Consumer real estate: HELOC 15 1,057 1,041 79 7,641 7,580 R/E installment loans 62 4,561 4,356 77 5,944 5,738 Total consumer real estate 77 5,618 5,397 156 13,585 13,318 Permanent mortgage — — — 5 709 713 Credit card & other 12 65 59 80 370 350 Total troubled debt restructurings 91 $ 31,716 $ 31,337 254 $ 42,946 $ 42,208 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (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 — $ — $ — 2 $ 842 $ 836 Total commercial (C&I) — — — 2 842 836 Consumer real estate: HELOC 45 4,451 4,396 107 9,333 9,139 R/E installment loans 15 1,630 1,622 43 3,386 3,306 Total consumer real estate 60 6,081 6,018 150 12,719 12,445 Permanent mortgage 2 34 32 11 2,043 2,028 Credit card & other 37 261 251 66 426 411 Total troubled debt restructurings 99 $ 6,376 $ 6,301 229 $ 16,030 $ 15,720 The following tables present TDRs which re-defaulted during the three and nine months ended September 30, 2018 and 2017 , 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. Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 (Dollars in thousands) Number Recorded Investment Number Recorded Investment Commercial (C&I): General C&I 1 $ 321 2 $ 579 Total commercial (C&I) 1 321 2 579 Consumer real estate: HELOC 1 40 5 204 R/E installment loans — — 1 25 Total consumer real estate 1 40 6 229 Permanent mortgage 3 294 5 699 Credit card & other 13 56 39 212 Total troubled debt restructurings 18 $ 711 52 $ 1,719 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in thousands) Number Recorded Investment Number Recorded Investment Commercial (C&I): General C&I 1 $ 1,763 4 $ 9,770 Total commercial (C&I) 1 1,763 4 9,770 Commercial Real Estate Income CRE 1 88 1 88 Total Commercial real estate 1 88 1 88 Consumer real estate: HELOC — — 4 685 Total consumer real estate — — 4 685 Permanent mortgage 1 89 2 627 Credit card & other 2 12 5 30 Total troubled debt restructurings 5 $ 1,952 16 $ 11,200

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses 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. 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 and are subject to qualitative adjustments by management to reflect current events, trends, and conditions (including economic considerations and trends). The current economic conditions and trends, performance of the housing market, unemployment levels, labor participation rate, regulatory guidance, and both positive and negative 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 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. The ALLL also includes 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. See Note 1 – Summary of Significant Accounting Policies and Note 5 - Allowance for Loan Losses in the Notes to Consolidated Financial Statements on FHN’s Form 10-K for the year ended December 31, 2017 , for additional information about the policies and methodologies used in the aforementioned components of the ALLL. The following table provides a rollforward of the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2018 and 2017 : (Dollars in thousands) C&I Commercial Real Estate Consumer Real Estate Permanent Mortgage Credit Card and Other Total Balance as of July 1, 2018 $ 96,834 $ 33,832 $ 31,769 $ 14,078 $ 8,949 $ 185,462 Charge-offs (1,391 ) (9 ) (2,801 ) (15 ) (5,266 ) (9,482 ) Recoveries 1,052 267 5,302 554 804 7,979 Provision/(provision credit) for loan losses 3,819 (175 ) (7,733 ) (1,137 ) 7,226 2,000 Balance as of September 30, 2018 100,314 33,915 26,537 13,480 11,713 185,959 Balance as of January 1, 2018 $ 98,211 $ 28,427 $ 37,371 $ 15,565 $ 9,981 $ 189,555 Charge-offs (6,753 ) (281 ) (6,193 ) (475 ) (14,271 ) (27,973 ) Recoveries 3,607 348 15,129 1,250 3,043 23,377 Provision/(provision credit) for loan losses 5,249 5,421 (19,770 ) (2,860 ) 12,960 1,000 Balance as of September 30, 2018 100,314 33,915 26,537 13,480 11,713 185,959 Allowance - individually evaluated for impairment 6,028 — 18,076 9,996 293 34,393 Allowance - collectively evaluated for impairment 92,382 33,893 7,331 3,484 11,078 148,168 Allowance - purchased credit-impaired loans 1,904 22 1,130 — 342 3,398 Loans, net of unearned as of September 30, 2018: Individually evaluated for impairment 53,549 2,503 119,729 74,833 552 251,166 Collectively evaluated for impairment 15,940,853 4,211,337 6,037,120 272,221 527,673 26,989,204 Purchased credit-impaired loans 49,743 23,196 34,334 — 2,571 109,844 Total loans, net of unearned income $ 16,044,145 $ 4,237,036 $ 6,191,183 $ 347,054 $ 530,796 $ 27,350,214 Balance as of July 1, 2017 $ 92,379 $ 30,470 $ 46,069 $ 16,398 $ 11,941 $ 197,257 Charge-offs (3,723 ) — (3,601 ) (173 ) (3,173 ) (10,670 ) Recoveries 601 278 6,188 542 671 8,280 Provision/(provision credit) for loan losses 8,948 (1,065 ) (7,717 ) (1,048 ) 882 — Balance as of September 30, 2017 98,205 29,683 40,939 15,719 10,321 194,867 Balance as of January 1, 2017 $ 89,398 $ 33,852 $ 50,357 $ 16,289 $ 12,172 $ 202,068 Charge-offs (6,188 ) (20 ) (11,401 ) (1,499 ) (9,805 ) (28,913 ) Recoveries 2,877 639 17,007 1,933 2,256 24,712 Provision/(provision credit) for loan losses 12,118 (4,788 ) (15,024 ) (1,004 ) 5,698 (3,000 ) Balance as of September 30, 2017 98,205 29,683 40,939 15,719 10,321 194,867 Allowance - individually evaluated for impairment 6,895 126 23,936 12,601 246 43,804 Allowance - collectively evaluated for impairment 88,529 29,557 16,649 3,118 10,075 147,928 Allowance - purchased credit-impaired loans 2,781 — 354 — — 3,135 Loans, net of unearned as of September 30, 2017: Individually evaluated for impairment 32,028 2,320 135,858 84,081 544 254,831 Collectively evaluated for impairment 12,739,091 2,244,895 4,232,564 319,001 349,889 19,885,440 Purchased credit-impaired loans 20,725 3,800 1,295 — — 25,820 Total loans, net of unearned income $ 12,791,844 $ 2,251,015 $ 4,369,717 $ 403,082 $ 350,433 $ 20,166,091

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The following is a summary of other intangible assets included in the Consolidated Condensed Statements of Condition: September 30, 2018 December 31, 2017 (Dollars in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Value Gross Carrying Amount Accumulated Amortization Net Carrying Value Core deposit intangibles (a) $ 157,150 $ (23,148 ) $ 134,002 $ 160,650 $ (8,176 ) $ 152,474 Customer relationships 77,865 (54,404 ) 23,461 77,865 (50,777 ) 27,088 Other (b) 5,622 (1,590 ) 4,032 5,622 (795 ) 4,827 Total $ 240,637 $ (79,142 ) $ 161,495 $ 244,137 $ (59,748 ) $ 184,389 (a) 2018 decrease in gross carrying amounts associated with the sale of two CBF branches and purchase accounting measurement period adjustments related to the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information. (b) Balance primarily includes noncompete covenants, as well as $ .3 million related to state banking licenses not subject to amortization. Amortization expense was $6.5 million and $2.0 million for the three months ended September 30, 2018 and 2017 , respectively and $19.4 million and $5.2 million for nine months ended September 30, 2018 and 2017 , respectively. As of September 30, 2018 the estimated aggregated amortization expense is expected to be: (Dollars in thousands) Year Amortization Remainder of 2018 $ 6,471 2019 24,834 2020 21,159 2021 19,547 2022 17,412 2023 16,117 Gross goodwill, accumulated impairments, and accumulated divestiture related write-offs were determined beginning January 1, 2012, 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 September 30, 2018 and December 31, 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 Condensed Statements of Condition as of September 30, 2018 and December 31, 2017 . (Dollars in thousands) Regional Banking Fixed Income Total December 31, 2016 $ 93,367 $ 98,004 $ 191,371 Additions (a) — 44,964 44,964 September 30, 2017 $ 93,367 $ 142,968 $ 236,335 December 31, 2017 $ 1,243,885 $ 142,968 $ 1,386,853 Additions (a) 22,969 — 22,969 September 30, 2018 $ 1,266,854 $ 142,968 $ 1,409,822 (a) 2017 increase associated with the Coastal acquisition, 2018 increase associated with measurement period adjustments for the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information.

Other Income and Other Expense

Other Income and Other Expense	9 Months Ended
	Sep. 30, 2018
Other Income and Expenses [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 Condensed Statements of Income: Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 All other income and commissions: Other service charges $ 3,758 $ 2,954 $ 11,609 $ 9,047 ATM and interchange fees 3,263 3,137 9,943 8,998 Dividend income (a) 2,757 — 8,130 — Mortgage banking 2,533 1,354 7,510 3,883 Deferred compensation 1,458 1,128 2,900 4,446 Electronic banking fees 1,309 1,282 3,741 3,911 Letter of credit fees 1,307 1,211 3,851 3,369 Insurance commissions 396 567 1,629 2,042 Gain/(loss) on extinguishment of debt (b) (1 ) (14,329 ) (1 ) (14,329 ) Other 5,875 2,739 16,020 7,684 Total $ 22,655 $ 43 $ 65,332 $ 29,051 All other expense: Travel and entertainment $ 3,988 $ 2,798 $ 12,102 $ 8,308 Other insurance and taxes 2,761 2,396 8,178 7,229 Employee training and dues 1,682 1,198 5,310 4,194 Supplies 1,635 928 5,458 2,884 Non-service components of net periodic pension and post-retirement cost 1,585 454 3,619 1,782 Tax credit investments 1,370 762 3,586 2,646 Customer relations 1,328 1,361 3,749 4,240 OREO 1,256 303 2,174 953 Miscellaneous loan costs 543 757 2,720 2,078 Litigation and regulatory matters (1,541 ) 8,162 609 8,403 Other (c) 11,094 8,994 64,527 29,837 Total $ 25,701 $ 28,113 $ 112,032 $ 72,554 Certain previously reported amounts have been revised to reflect the retroactive effect of the adoption of ASU 2017-07 “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” See Note 1 - Financial Information for additional information. (a) 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 first quarter 2018 these amounts were included in Interest income on the Consolidated Condensed Statements of Income. (b) Loss on extinguishment of debt for three and nine months ended September 30, 2017 relates to the repurchase of equity securities previously included in a financing transaction. (c) Expense increase for the nine months ended September 30, 2018 largely attributable to an increase in acquisition- and integration-related expense primarily associated with the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information.

Components of Other Comprehensi

Components of Other Comprehensive Income/(Loss)	9 Months Ended
	Sep. 30, 2018
Equity [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 three and nine months ended September 30, 2018 and 2017 : (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of July 1, 2018 $ (107,476 ) $ (19,757 ) $ (284,881 ) $ (412,114 ) Net unrealized gains/(losses) (25,924 ) (2,517 ) — (28,441 ) Amounts reclassified from AOCI — 771 2,135 2,906 Other comprehensive income/(loss) (25,924 ) (1,746 ) 2,135 (25,535 ) Balance as of September 30, 2018 $ (133,400 ) $ (21,503 ) $ (282,746 ) $ (437,649 ) Balance as of January 1, 2018 $ (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) (106,522 ) (14,612 ) — (121,134 ) Amounts reclassified from AOCI (39 ) 1,079 5,481 6,521 Other comprehensive income/(loss) (106,561 ) (13,533 ) 5,481 (114,613 ) Balance as of September 30, 2018 $ (133,400 ) $ (21,503 ) $ (282,746 ) $ (437,649 ) (Dollars in thousands) Securities AFS Cash Flow Hedges Pension and Post-retirement Plans Total Balance as of July 1, 2017 $ (9,857 ) $ (1,024 ) $ (226,581 ) $ (237,462 ) Net unrealized gains/(losses) 3,918 (91 ) 490 4,317 Amounts reclassified from AOCI (1 ) (643 ) 1,405 761 Other comprehensive income/(loss) 3,917 (734 ) 1,895 5,078 Balance as of September 30, 2017 $ (5,940 ) $ (1,758 ) $ (224,686 ) $ (232,384 ) Balance as of January 1, 2017 $ (17,232 ) $ (1,265 ) $ (229,157 ) $ (247,654 ) Net unrealized gains/(losses) 11,570 1,906 490 13,966 Amounts reclassified from AOCI (278 ) (2,399 ) 3,981 1,304 Other comprehensive income/(loss) 11,292 (493 ) 4,471 15,270 Balance as of September 30, 2017 $ (5,940 ) $ (1,758 ) $ (224,686 ) $ (232,384 ) Reclassifications from AOCI, and related tax effects, were as follows: (Dollars in thousands) Three Months Ended Nine Months Ended September 30 Details about AOCI 2018 2017 2018 2017 Affected line item in the statement where net income is presented Securities AFS: Realized (gains)/losses on securities AFS $ — $ (1 ) $ (52 ) $ (450 ) Debt securities gains/(losses), net Tax expense/(benefit) — — 13 172 Provision/(benefit) for income taxes — (1 ) (39 ) (278 ) Cash flow hedges: Realized (gains)/losses on cash flow hedges 1,024 (1,041 ) 1,433 (3,886 ) Interest and fees on loans Tax expense/(benefit) (253 ) 398 (354 ) 1,487 Provision/(benefit) for income taxes 771 (643 ) 1,079 (2,399 ) Pension and Postretirement Plans: Amortization of prior service cost and net actuarial gain/(loss) 2,836 2,277 7,280 6,450 All other expense Tax expense/(benefit) (701 ) (872 ) (1,799 ) (2,469 ) Provision/(benefit) for income taxes 2,135 1,405 5,481 3,981 Total reclassification from AOCI $ 2,906 $ 761 $ 6,521 $ 1,304

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
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: Three Months Ended Nine Months Ended (Dollars and shares in thousands, except per share data) 2018 2017 2018 2017 Net income/(loss) $ 274,716 $ 71,769 $ 455,702 $ 225,361 Net income attributable to noncontrolling interest 2,883 2,883 8,555 8,555 Net income/(loss) attributable to controlling interest 271,833 68,886 447,147 216,806 Preferred stock dividends 1,550 1,550 4,650 4,650 Net income/(loss) available to common shareholders $ 270,283 $ 67,336 $ 442,497 $ 212,156 Weighted average common shares outstanding—basic 324,406 233,749 325,341 233,438 Effect of dilutive securities 2,846 2,591 3,304 2,934 Weighted average common shares outstanding—diluted 327,252 236,340 328,645 236,372 Net income/(loss) per share available to common shareholders $ 0.83 $ 0.29 $ 1.36 $ 0.91 Diluted income/(loss) per share available to common shareholders $ 0.83 $ 0.28 $ 1.35 $ 0.90 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: Three Months Ended Nine Months Ended (Shares in thousands) 2018 2017 2018 2017 Stock options excluded from the calculation of diluted EPS 2,251 2,595 2,316 2,490 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 23.67 $ 25.00 $ 24.43 $ 25.70 Other equity awards excluded from the calculation of diluted EPS 1,605 1,002 538 325

Contingencies and Other Disclos

Contingencies and Other Disclosures	9 Months Ended
	Sep. 30, 2018
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 former 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 September 30, 2018 , the aggregate amount of liabilities established for all such loss contingency matters was $32.8 million . These liabilities are separate from those discussed under the heading “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 September 30, 2018 , FHN estimates that for all material loss contingency matters, estimable reasonably possible losses in future periods in excess of currently established liabilities could aggregate in a range from zero to approximately $20 million . 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. That possibility exists both for matters included in the estimated reasonably possible loss (“RPL”) range mentioned above and for matters not included in that range. Material Matters FHN is defending a suit claiming material deficiencies in the offering documents under which certificates relating to First Horizon branded securitizations were sold: Federal Deposit Insurance Corporation (“FDIC”) as receiver for Colonial Bank, in the U.S. District Court for the Southern District of New York (Case No. 12 Civ. 6166 (LLS)(MHD)). The plaintiff in that suit claims to have purchased (and later sold) certificates totaling $83.4 million , relating to a number of separate securitizations. Plaintiff demands damages and prejudgment interest, among several remedies sought. The current liability and RPL estimates for this matter are subject to significant uncertainties regarding: the dollar amounts claimed; the potential remedies that might be available or awarded; the outcome of settlement discussions; the availability of significantly dispositive defenses; and the incomplete status of the discovery process. Underwriters are co-defendants in the FDIC- Colonial Bank matter and have demanded, under provisions in the applicable underwriting agreements, that FHN indemnify them for their expenses and any losses they may incur. In addition, FHN has received indemnity demands from underwriters in certain other suits as to which investors claim to have purchased certificates in FH proprietary securitizations but as to which FHN has not been named a defendant. For most pending indemnity claims involving FH proprietary securitizations FHN is unable to estimate an RPL range due to significant uncertainties regarding: claims as to which the claimant specifies no dollar amount; the potential remedies that might be available or awarded; the availability of significantly dispositive defenses such as statutes of limitations or repose; the outcome of potentially dispositive early-stage motions such as motions to dismiss; the incomplete status of the discovery process; the lack of a precise statement of damages; and lack of precedent claims. The alleged purchase prices of the certificates subject to pending indemnification claims, excluding the FDIC-Colonial Bank matter, total $231.2 million . FHN has received a notice of indemnification claims 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, FHN’s subservicer. The notice asserts several categories of indemnity obligations by FHN to Nationstar 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 is contending with indemnification claims related to other whole loans sold. These claims generally assert that FHN-originated loans contributed to claimant’s losses in connection with settlements that claimant paid to various third parties in connection with mortgage loans securitized by claimant. 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 has additional potential exposures related to its former 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 could be included in the repurchase liability discussed below, and some might eventually result in litigation-oriented liability, but none are included in the material loss contingency liabilities mentioned above or in the RPL range mentioned above. Additional information concerning such exposures is provided below in “Obligations from Legacy Mortgage Businesses.” Obligations from Legacy Mortgage Businesses Loss contingencies mentioned above under “Material Matters” stem from FHN’s former mortgage origination and servicing businesses. FHN retains potential for further exposure, in addition to the matters mentioned, from those former businesses. The following discussion provides context and other information to enhance an understanding of those matters and exposures. Overview Prior to September 2008 FHN originated loans through its legacy mortgage business, primarily first lien home loans, with the intention of selling them. Sales typically were effected either as non-recourse whole-loan sales or through non-recourse proprietary securitizations. Conventional conforming single-family residential mortgage loans were sold predominately to two GSEs: Fannie Mae and Freddie Mac. Also, federally insured or guaranteed whole loans were pooled, and payments to investors were guaranteed through Ginnie Mae. Many mortgage loan originations, especially nonconforming mortgage loans, were sold to investors, or certificate-holders, predominantly through FH proprietary securitizations but also, to a lesser extent, through other whole loans sold to private non-Agency purchasers. FHN used only one trustee for all of its FH proprietary securitizations. FHN also originated mortgage loans eligible for FHA insurance or VA guaranty. In addition, FHN originated and sold HELOCs and second lien mortgages through other whole loans sold to private purchasers and, to a lesser extent, through FH proprietary securitizations. Currently, only one FH securitization of HELOCs remains outstanding. For non-recourse loan sales, FHN has exposure: to indemnify underwriters of FH securitizations who are defending claims that they assert are based, at least in part, on FHN's breach of its representations and warranties made at closing to underwriters, the purchasers and the trustee of FH proprietary securitizations; and to indemnify purchasers of other whole loans sold, or their assignees, asserting that FHN breached representations and warranties made in connection with the sales of those loans. During the time these legacy activities were conducted, FHN frequently sold mortgage loans “with servicing retained.” As a result, FHN accumulated substantial amounts of MSR on its consolidated balance sheet, as well as contractual servicing obligations and related deposits and receivables. FHN conducted a significant servicing business under its First Horizon Home Loans brand. MI was required by GSE rules for certain of the loans sold to GSEs and was also provided for certain of the loans that were securitized. MI generally was provided for first lien loans sold or securitized having an LTV ratio at origination of greater than 80 percent . In 2007, market conditions deteriorated to the point where mortgage-backed securitizations no longer could be sold economically; FHN’s last securitization occurred that year. FHN continued selling mortgage loans to GSEs until August 31, 2008, when FHN sold its national mortgage origination and servicing platforms along with a portion of its servicing assets and obligations. FHN contracted to have its remaining servicing obligations sub-serviced. Since the platform sale FHN has sold substantially all remaining servicing assets and obligations. Certain mortgage-related terms used in this “Contingencies” section are defined in “Mortgage-Related Glossary” at the end of this Overview. Repurchase and Make-Whole Obligations Starting in 2009, FHN received a high number of claims either to repurchase loans from the purchaser or to pay the purchaser to “make them whole” for economic losses incurred. These claims have been driven primarily by loan delinquencies. In repurchase or make-whole claims a loan purchaser typically asserts that specified loans violated representations and warranties FHN made when the loans were sold. A significant majority of claims received overall have come from GSEs, and the remainder are from purchasers of other whole loans sold. FHN has not received a loan repurchase or make-whole claim from the FH proprietary securitization trustee. Generally, FHN reviews each claim and MI cancellation notice individually. FHN’s responses include appeal, provide additional information, deny the claim (rescission), repurchase the loan or remit a make-whole payment, or reflect cancellation of MI. After several years resolving repurchase and make-whole claims with each GSE on a loan-by-loan basis, in 2013 and 2014 FHN entered into DRAs with the GSEs, resolving a substantial majority of potential claims. Starting in 2014, the overall number of such claims diminished substantially, primarily as a result of the DRAs. Each DRA resolved obligations associated with loans originated from 2000 to 2008, but certain obligations and loans were excluded. Under each DRA, FHN remains responsible for repurchase obligations related to certain excluded defects (such as title defects and violations of the GSE’s Charter Act) and FHN continues to have loan repurchase or monetary compensation obligations under the DRAs related to private mortgage insurance rescissions, cancellations, and denials (with certain exceptions). FHN also has exposure related to loans where there has been a prior bulk sale of servicing, as well as certain other whole-loan sales. With respect to loans where there has been a prior bulk sale of servicing, FHN is not responsible for MI cancellations and denials to the extent attributable to the acts of the current servicer. While large portions of repurchase claims from the GSEs were settled with the DRAs, comprehensive settlement of repurchase, make-whole, and indemnity claims with non-Agency claimants is not practical. Such claims that are not resolved by the parties can, and sometimes have, become litigation. FH Proprietary Securitization Actions FHN has potential financial exposure from FH proprietary securitizations outside of the repurchase/make-whole process. Several investors in certificates sued FHN and others starting in 2009, and several underwriters or other counterparties have demanded that FHN indemnify and defend them in securitization lawsuits. The pending suits generally assert that disclosures made to investors in the offering and sale of certificates were legally deficient. Servicing Obligations FHN’s national servicing business was sold as part of the platform sale in 2008. A significant amount of MSR was sold at that time, and a significant amount was retained. The related servicing activities, including foreclosure and loss mitigation practices, not sold in 2008 were outsourced through a three -year subservicing arrangement (the “2008 subservicing agreement”) with the platform buyer (the “2008 subservicer”). The 2008 subservicing agreement expired in 2011 when FHN entered into a replacement agreement with a new subservicer (the “2011 subservicer”). In fourth quarter 2013, FHN contracted to sell a substantial majority of its remaining servicing obligations and servicing assets (including advances) to the 2011 subservicer. The servicing was transferred to the buyer in stages, and was substantially completed in first quarter 2014. The servicing still retained by FHN continues to be subserviced. As servicer, FHN had contractual obligations to the owners of the loans (primarily GSEs) and securitization trustees, to handle billing, custodial, and other tasks related to each loan. Each subservicer undertook to perform those obligations on FHN’s behalf during the applicable subservicing period, although FHN legally remained the servicer of record for those loans that were subserviced. The 2008 subservicer has been subject to a consent decree, and entered into a settlement agreement with regulators related to alleged deficiencies in servicing and foreclosure practices. The 2008 subservicer has made demands of FHN, under the 2008 subservicing agreement, to pay certain resulting costs and damages totaling $43.5 million . FHN disagrees with those demands and has made no payments. This disagreement has the potential to result in litigation and, in any such future litigation, the claim against FHN may be substantial. Origination Data From 2005 through 2008, FHN originated and sold $69.5 billion of mortgage loans connected with the Agencies. This includes $57.6 billion of loans sold to GSEs and $11.9 billion of loans guaranteed by Ginnie Mae. Although FHN conducted these businesses before 2005, GSE loans originated in 2005 through 2008 account for a substantial majority of all repurchase requests/make-whole claims received since the 2008 platform sale. From 2005 through 2007, $26.7 billion of mortgage loans were included in FH proprietary securitizations. The last FH securitization occurred in 2007. Mortgage-Related Glossary Agencies the two GSEs and Ginnie Mae HELOC home equity line of credit certificates securities sold to investors representing interests in mortgage loan securitizations HUD Dept. of Housing and Urban Development DOJ U.S. Department of Justice LTV loan-to-value, a ratio of the loan amount divided by the home value DRA definitive resolution agreement with a GSE MI private mortgage insurance, insuring against borrower payment default Fannie Mae, Fannie, FNMA Federal National Mortgage Association MSR mortgage servicing rights FH proprietary securitization securitization of mortgages sponsored by FHN under its First Horizon brand nonconforming loans loans that did not conform to Agency program requirements FHA Federal Housing Administration other whole loans sold mortgage loans sold to private, non-Agency purchasers Freddie Mac, Freddie, FHLMC Federal Home Loan Mortgage Corporation 2008 platform sale, platform sale FHN’s sale of its national mortgage origination and servicing platforms in 2008 Ginnie Mae, Ginnie, GNMA Government National Mortgage Association pipeline or active pipeline pipeline of mortgage repurchase, make-whole, & certain related claims against FHN GSEs Fannie Mae and Freddie Mac VA Veterans Administration Repurchase and Foreclosure Liability The repurchase and foreclosure liability is comprised of reserves to cover estimated loss content in the active pipeline, estimated future inflows, as well as 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, and certain related exposures and has accrued for losses of $ 32.5 million and $34.2 million as of September 30, 2018 and December 31, 2017 , respectively, including a smaller amount related to equity-lending junior lien loan sales. Accrued liabilities for FHN’s estimate of these obligations are reflected in Other liabilities on the Consolidated Condensed Statements of Condition. Charges/expense reversals to increase/decrease the liability are included within Repurchase and foreclosure provision/(provision credit) on the Consolidated Condensed 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 FHN Mortgage Exposures At September 30, 2018 , FHN had not accrued a liability for exposure for repurchase of first-lien loans related to FH proprietary securitizations arising from claims from the trustee that FHN breached its representations and warranties in FH proprietary securitizations at closing, and no such claims had been made. FHN’s trustee is a defendant in lawsuits in which the plaintiffs have asserted that the trustee has duties to review loans and otherwise to act against FHN outside of the duties specified in the applicable trust documents; FHN is not a defendant and is not able to assess what, if any, exposure FHN may have as a result of them. FHN is defending, directly or as indemnitor, certain pending lawsuits brought by purchasers of certificates in FH proprietary securitizations or their assignees. FHN believes a new lawsuit based on federal securities claims that offering disclosures were deficient cannot be brought at this time due to the running of applicable limitation periods, but other investor claims, based on other legal theories, might still be possible. Due to sales of MSR from 2008 to 2014, FHN has limited visibility into current loan information such as principal payoffs, refinance activity, delinquency trends, and loan modification activity. Many non-GSE purchasers of whole loans from FHN included those loans in their own securitizations. Regarding such other whole loans sold, FHN made representations and warranties concerning the loans and provided indemnity covenants to the purchaser/securitizer. Typically, the purchaser/securitizer assigned key contractual rights against FHN to the securitization trustee. As mentioned above, repurchase, make-whole, indemnity, and other monetary claims related to specific loans are included in the active pipeline and repurchase reserve. In addition, currently the following categories of actions are pending which involve FHN and other whole loans sold: (i) FHN has received indemnification requests from purchasers of loans or their assignees in cases where FHN is not a defendant; (ii) FHN has received subpoenas seeking loan reviews in cases where FHN is not a defendant; and (iii) FHN has received repurchase, indemnity, and other demands from purchasers or their assignees. At September 30, 2018 , FHN’s repurchase and foreclosure liability considered certain known exposures from other whole loans sold. OTHER DISCLOSURES Visa Matters FHN is a member of the Visa USA network. In October 2007, the Visa organization of affiliated entities completed a series of global restructuring transactions to combine its affiliated operating companies, including Visa USA, under a single holding company, Visa Inc. (“Visa”). Upon completion of the reorganization, the members of the Visa USA network remained contingently liable for certain Visa litigation matters (the “Covered Litigation”). Based on its proportionate membership share of Visa USA, FHN recognized a contingent liability in fourth quarter 2007 related to this contingent obligation. In March 2008, Visa completed its initial public offering (“IPO”) and funded an escrow account from its IPO proceeds to be used to make payments related to the Visa litigation matters. FHN received approximately 2.4 million Class B shares in conjunction with Visa’s IPO. FHN executed sales of its Visa Class B shares in December 2010, September 2011 and September 2018, resulting in the complete disposition of its holdings of these shares and relief from the contingent liability. In each sale 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. See Note 14 - Derivatives for further discussion of these transactions. 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	9 Months Ended
	Sep. 30, 2018
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. In second quarter 2018, FHN made an insignificant contribution to the qualified pension plan. Management does not currently anticipate that FHN will make a contribution to the qualified pension plan for the remainde r of 2018. FHN assumed two additional qualified plans in conjunction with the CBF acquisition. Both legacy CBF plans are frozen. FHN contributed $5.1 million to these plans in December 2017. As of December 31, 2017, the aggregate benefit obligation for the plans was $18.7 million and aggregate plan assets were $18.6 million . Benefit payments, expense and actuarial gains/losses related to these plans were insignificant for 2018 and 2017. Additional funding amounts to these plans are dependent upon the potential settlement of the plans. 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 $5.4 million for 2017 . FHN anticipates making benefit payments under the non-qualified plans of $5.7 million in 2018 . 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 elections. 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. 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. Service cost is included in Employee compensation, incentives, and benefits in the Consolidated Condensed Statements of Income. All other components of net periodic benefit cost are included in All other expense. The components of net periodic benefit cost for the three months ended September 30 are as follows: Pension Benefits Other Benefits (Dollars in thousands) 2018 2017 2018 2017 Components of net periodic benefit cost Service cost $ 11 $ 9 $ 33 $ 26 Interest cost 6,935 7,276 328 328 Expected return on plan assets (8,222 ) (9,230 ) (268 ) (236 ) Amortization of unrecognized: Prior service cost/(credit) — 13 — 23 Actuarial (gain)/loss 3,164 2,380 (108 ) (140 ) Net periodic benefit cost/(credit) $ 1,888 $ 448 $ (15 ) $ 1 The components of net periodic benefit cost for the nine months ended September 30 are as follows: Pension Benefits Other Benefits (Dollars in thousands) 2018 2017 2018 2017 Components of net periodic benefit cost Service cost $ 31 $ 28 $ 100 $ 80 Interest cost 20,908 22,035 982 979 Expected return on plan assets (24,673 ) (27,011 ) (806 ) (710 ) Amortization of unrecognized: Prior service cost/(credit) — 39 — 71 Actuarial (gain)/loss 9,076 7,140 (290 ) (425 ) Net periodic benefit cost/(credit) $ 5,342 $ 2,231 $ (14 ) $ (5 )

Business Segment Information

Business Segment Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [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 in Tennessee, North Carolina, South Carolina, Florida 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, and acquisition- and integration-related costs. The non-strategic segment consists of run-off consumer lending activities, legacy (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 for each segment for the three and nine months ended September 30 : Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Consolidated Net interest income $ 305,700 $ 209,817 $ 917,805 $ 600,226 Provision/(provision credit) for loan losses 2,000 — 1,000 (3,000 ) Noninterest income (a) 348,972 112,417 612,514 357,029 Noninterest expense 294,031 236,869 940,064 676,991 Income/(loss) before income taxes 358,641 85,365 589,255 283,264 Provision/(benefit) for income taxes (b) 83,925 13,596 133,553 57,903 Net income/(loss) $ 274,716 $ 71,769 $ 455,702 $ 225,361 Average assets $ 40,077,033 $ 28,874,827 $ 40,199,487 $ 28,852,679 Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Regional Banking Net interest income $ 302,448 $ 209,100 $ 902,546 $ 604,075 Provision/(provision credit) for loan losses 8,045 8,552 17,428 11,910 Noninterest income 79,857 64,370 240,093 188,089 Noninterest expense 207,591 150,445 619,283 451,135 Income/(loss) before income taxes 166,669 114,473 505,928 329,119 Provision/(benefit) for income taxes 39,101 41,191 118,929 118,771 Net income/(loss) $ 127,568 $ 73,282 $ 386,999 $ 210,348 Average assets $ 28,659,158 $ 19,158,852 $ 28,450,747 $ 18,519,999 Fixed Income Net interest income $ 9,048 $ 5,985 $ 26,686 $ 12,126 Noninterest income 41,123 55,803 125,091 161,833 Noninterest expense 47,306 53,136 145,635 155,865 Income/(loss) before income taxes 2,865 8,652 6,142 18,094 Provision/(benefit) for income taxes 532 2,970 988 5,929 Net income/(loss) $ 2,333 $ 5,682 $ 5,154 $ 12,165 Average assets $ 3,247,016 $ 2,586,773 $ 3,326,118 $ 2,388,740 Corporate Net interest income/(expense) $ (15,415 ) $ (13,769 ) $ (48,651 ) $ (42,408 ) Noninterest income (a) 222,619 (9,476 ) 240,665 2,219 Noninterest expense 33,323 23,926 152,797 65,365 Income/(loss) before income taxes 173,881 (47,171 ) 39,217 (105,554 ) Provision/(benefit) for income taxes (b) 40,529 (34,167 ) 4,253 (82,758 ) Net income/(loss) $ 133,352 $ (13,004 ) $ 34,964 $ (22,796 ) Average assets $ 6,904,585 $ 5,697,894 $ 6,990,484 $ 6,421,643 Non-Strategic Net interest income $ 9,619 $ 8,501 $ 37,224 $ 26,433 Provision/(provision credit) for loan losses (6,045 ) (8,552 ) (16,428 ) (14,910 ) Noninterest income (c) 5,373 1,720 6,665 4,888 Noninterest expense 5,811 9,362 22,349 4,626 Income/(loss) before income taxes 15,226 9,411 37,968 41,605 Provision/(benefit) for income taxes 3,763 3,602 9,383 15,961 Net income/(loss) $ 11,463 $ 5,809 $ 28,585 $ 25,644 Average assets $ 1,266,274 $ 1,431,308 $ 1,432,138 $ 1,522,297 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Three and nine months ended September 30, 2018 includes a $212.9 million pre-tax gain from the sale of Visa Class B Shares. Three and nine months ended September 30, 2017 includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction. (b) Provision/(benefit) for income taxes for consolidated results and the Corporate segment for the three and nine months ended September 30, 2017 was affected by a decline in the effective tax rate in 2017 primarily related to the reversal of the valuation allowance for the deferred tax asset related to its 2012 federal capital loss carry forward based on capital gain transactions initiated in second quarter 2017. See Note 15 - Income Taxes in the Notes to Consolidated Financial Statements on FHN’s Form 10-K for the year ended December 31, 2016 for additional information related to FHN’s valuation allowance related to its capital loss carryforward. (c) Three and nine months ended September 30, 2018 includes a $3.8 million gain from the reversal of a previous valuation adjustment due to sales of TRUPs loans. The following table reflects a disaggregation of FHN’s noninterest income by major product line and reportable segment for the three and nine months ended September 30, 2018 and 2017 : Three Months Ended September 30, 2018 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 103 $ 40,937 $ (5 ) $ 3,778 $ 44,813 Deposit transactions and cash management 34,008 3 1,725 56 35,792 Brokerage, management fees and commissions 14,200 — — — 14,200 Trust services and investment management 7,453 — (15 ) — 7,438 Bankcard income 6,999 — 57 (178 ) 6,878 Bank-owned life insurance (b) — — 4,337 — 4,337 Debt securities gains/(losses), net (b) — — — — — Equity securities gains/(losses), net (b) (d) — — 212,859 — 212,859 All other income and commissions (c) 17,094 183 3,661 1,717 22,655 Total noninterest income $ 79,857 $ 41,123 $ 222,619 $ 5,373 $ 348,972 Three Months Ended September 30, 2017 Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income $ 135 $ 55,623 $ — $ — $ 55,758 Deposit transactions and cash management 26,620 — 1,339 52 28,011 Brokerage, management fees and commissions 11,937 — — — 11,937 Trust services and investment management 6,968 — (15 ) — 6,953 Bankcard income 6,057 — 56 57 6,170 Bank-owned life insurance — — 3,539 — 3,539 Debt securities gains/(losses), net — — 1 — 1 Equity securities gains/(losses), net — — 5 — 5 All other income and commissions (e) 12,653 180 (14,401 ) 1,611 43 Total noninterest income $ 64,370 $ 55,803 $ (9,476 ) $ 1,720 $ 112,417 (a) Includes $8.4 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." Non-Strategic includes a $3.8 million gain from the reversal of a previous valuation adjustment due to sales of TRUPs loans excluded from the scope of ASC 606. (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 other service charges, ATM and interchange fees, electronic banking fees, and insurance commission in scope of ASC 606. (d) In third quarter 2018, FHN sold its remaining holdings of Visa Class B shares resulting in a pre-tax gain of $212.9 million . (e) Corporate includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction. Nine Months Ended September 30, 2018 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 314 $ 123,929 $ (5 ) $ 3,778 $ 128,016 Deposit transactions and cash management 103,275 9 4,416 159 107,859 Brokerage, management fees and commissions 41,423 — — — 41,423 Trust services and investment management 22,891 — (44 ) — 22,847 Bankcard income 19,921 — 168 (131 ) 19,958 Bank-owned life insurance (b) — — 14,103 — 14,103 Debt securities gains/(losses), net (b) — — 52 — 52 Equity securities gains/(losses), net (b) (d) — — 212,924 — 212,924 All other income and commissions (c) (e) 52,269 1,153 9,051 2,859 65,332 Total noninterest income $ 240,093 $ 125,091 $ 240,665 $ 6,665 $ 612,514 Nine Months Ended September 30, 2017 Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income $ 348 $ 161,198 $ — $ — $ 161,546 Deposit transactions and cash management 76,288 — 4,004 142 80,434 Brokerage, management fees and commissions 35,872 — — — 35,872 Trust services and investment management 21,360 — (56 ) — 21,304 Bankcard income 16,894 — 169 167 17,230 Bank-owned life insurance — — 11,137 — 11,137 Debt securities gains/(losses), net 386 — 64 — 450 Equity securities gains/(losses), net — — 5 — 5 All other income and commissions (f) 36,941 635 (13,104 ) 4,579 29,051 Total noninterest income $ 188,089 $ 161,833 $ 2,219 $ 4,888 $ 357,029 (a) Includes $24.0 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." Non-Strategic includes a $3.8 million gain from the reversal of a previous valuation adjustment due to sales of TRUPs loans excluded from the scope of ASC 606. (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 other service charges, ATM and interchange fees, electronic banking fees, and insurance commission in scope of ASC 606. (d) In third quarter 2018, FHN sold its remaining holdings of Visa Class B shares resulting in a pre-tax gain of $212.9 million . (e) Corporate includes $4.1 million of gains on the sales of buildings. (f) 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	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [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 FHN holds 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 is considered a VIE 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 trust’s economic performance. The retention of mortgage service rights ("MSR") and a residual interest results in FHN potentially absorbing losses or receiving benefits that are significant to the trust. FHN is considered the primary beneficiary, as it is assumed to have the power, as Master Servicer, to most significantly impact the activities of the VIE. Consolidation of the trust results in the recognition of the trust proceeds as restricted borrowings since the cash flows on the securitized loans can 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 is reimbursed for these advances only after other parties in the securitization have received all of the cash flows to which they are entitled. If loan losses requiring draws on the related monoline insurers’ policies (which protect bondholders in the securitization) exceed a certain level, FHN may not receive reimbursement for all of the funds advanced to borrowers, as the senior bondholders and the monoline insurers typically have priority for repayment. Amounts funded from monoline insurance policies are considered restricted term borrowings in FHN’s Consolidated Condensed 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 hold no recourse to the assets of FHN. 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 September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 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 17,106 N/A 24,175 N/A Less: Allowance for loan losses — N/A — N/A Total net loans 17,106 N/A 24,175 N/A Other assets 35 $ 84,170 47 $ 80,479 Total assets $ 17,141 $ 84,170 $ 24,222 $ 80,479 Liabilities: Term borrowings $ 4,071 N/A $ 11,226 N/A Other liabilities — $ 63,017 2 $ 61,733 Total liabilities $ 4,071 $ 63,017 $ 11,228 $ 61,733 Nonconsolidated Variable Interest Entities Low Income Housing Partnerships. First Tennessee Housing Corporation (“FTHC”), a wholly-owned subsidiary of 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 FTHC, 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. FTHC 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 FTHC’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 $1.2 million and $.3 million for three months ended September 30, 2018 and 2017 . Expenses associated with these investments were $3.1 million and $1.4 million for nine months ended September 30, 2018 and 2017 .The following table summarizes the impact to the Provision/(benefit) for income taxes on the Consolidated Condensed Statements of Income for the three and nine months ended September 30, 2018 , and 2017 for LIHTC investments accounted for under the proportional amortization method. Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Provision/(benefit) for income taxes: Amortization of qualifying LIHTC investments $ 1,547 $ 3,774 $ 6,094 $ 8,414 Low income housing tax credits (2,584 ) (3,103 ) (7,681 ) (8,101 ) Other tax benefits related to qualifying LIHTC investments (1,412 ) (2,478 ) (2,996 ) (4,307 ) Other Tax Credit Investments. First Tennessee New Markets Corporation (“FTNMC”), a wholly-owned subsidiary of FTBNA, 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. FTHC 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. 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 FTHC, 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. FTHC 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 FTHC’s initial capital contributions and funding commitments. Small Issuer Trust Preferred Holdings . FTBNA holds variable interests in trusts which have issued mandatorily redeemable preferred capital securities (“trust preferreds”) for smaller banking and insurance enterprises. FTBNA 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 FTBNA. 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 FTBNA’s holdings, FTBNA 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 FTBNA. However, since FTBNA 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. FTBNA has no contractual requirements to provide financial support to the trusts. On-Balance Sheet Trust Preferred Securitization. In 2007, FTBNA 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. FTBNA 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 FTBNA did not retain servicing or other decision making rights, FTBNA 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, FTBNA has accounted for the funds received through the securitization as a term borrowing in its Consolidated Condensed Statements of Condition. FTBNA 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, FTBNA 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 FTBNA 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, FTBNA is exposed to potentially significant benefits and losses of the borrowing entity. FTBNA 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 . FTB 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, FTB loaned funds to a related party of the buyer that were used for the purchase price of the building. FTB 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, it is being accounted for using the deposit method which creates a net asset or liability for all cash flows between FTB and the buyer. The buyer-lessor in this transaction meets the definition of a VIE as it does not have sufficient equity at risk since FTB 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, FTB does not consolidate the leasing entity. Proprietary Trust Preferred Issuances . In conjunction with the acquisition of CBF, FHN acquired junior subordinated debt totaling $212.4 million underlying multiple issuances of trust preferred debt by institutions previously acquired by CBF. All of these 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. In third quarter 2018, FHN retired $10.3 million of this debt and the related trust preferred debt. FHN has retired or given notice of its election to retire an additional $35.1 million of this debt in fourth quarter 2018. The following table summarizes FHN’s nonconsolidated VIEs as of September 30, 2018 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type Low income housing partnerships $ 118,355 $ 52,148 (a) Other tax credit investments (b) (c) 17,878 — Other assets Small issuer trust preferred holdings (d) 276,825 — Loans, net of unearned income On-balance sheet trust preferred securitization 48,306 65,868 (e) Proprietary residential mortgage securitizations 1,592 — Trading securities Holdings of agency mortgage-backed securities (d) 5,209,810 — (f) Commercial loan troubled debt restructurings (g) 41,926 — Loans, net of unearned income Sale-leaseback transaction 16,327 — (h) Proprietary trust preferred issuances (i) — 202,068 Term borrowings (a) Maximum loss exposure represents $66.2 million of current investments and $52.1 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, $18.0 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 $65.9 million classified as Term borrowings. (f) Includes $.8 billion classified as Trading securities and $4.4 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $41.4 million of current receivables and $.6 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, 2017 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type Low income housing partnerships $ 94,798 $ 33,348 (a) Other tax credit investments (b) (c) 20,394 — Other assets Small issuer trust preferred holdings (d) 332,455 — Loans, net of unearned income On-balance sheet trust preferred securitization 48,817 65,357 (e) Proprietary residential mortgage securitizations 2,151 — Trading securities Holdings of agency mortgage-backed securities (d) 5,349,287 — (f) Commercial loan troubled debt restructurings (g) 19,411 — Loans, net of unearned income Sale-leaseback transaction 14,827 — (h) Proprietary trust preferred issuances (i) — 212,378 Term borrowings (a) Maximum loss exposure represents $61.5 million of current investments and $33.3 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, $18.0 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 $65.4 million classified as Term borrowings. (f) Includes $.5 billion classified as Trading securities and $4.8 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $19.1 million of current receivables and $ .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	9 Months Ended
	Sep. 30, 2018
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. Both central clearinghouses used by FHN consider daily variation margin posted or received as legal settlements of the related derivative contracts. This results in these amounts being presented net by contract in the Consolidated Condensed Statements of Condition. This has no effect on hedge accounting or gains/losses for the applicable derivative contracts. On September 30, 2018 and December 31, 2017 , respectively, FHN had $81.7 million and $60.3 million of cash receivables and $50.3 million and $49.7 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 in a dealer capacity 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 Condensed Statements of Condition as Derivative assets and Derivative liabilities. The FTN 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 $34.3 million and $45.0 million for the three months ended September 30, 2018 and 2017 , and $102.3 million and $133.3 million for the nine months ended September 30, 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 September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 2,200,080 $ 7,861 $ 55,392 Offsetting upstream interest rate contracts 2,200,080 7,904 8,244 Option contracts purchased 30,000 32 — Forwards and futures purchased 5,425,631 4,915 14,002 Forwards and futures sold 5,701,595 15,098 4,768 December 31, 2017 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 2,026,753 $ 22,097 $ 18,323 Offsetting upstream interest rate contracts 2,026,753 17,931 20,720 Option contracts purchased 20,000 15 — Forwards and futures purchased 6,257,140 4,354 5,526 Forwards and futures sold 6,292,012 5,806 4,010 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 Condensed Statements of Income. FHN has designated a derivative transaction in a hedging strategy to manage interest rate risk on $400.0 million of senior debt issued by FTBNA which matures in December 2019. 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 balance sheet impact of this swap was not significant as of September 30, 2018 and was $ .1 million in Derivative assets as of December 31, 2017 . 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 balance sheet impact of this swap was not significant as of September 30, 2018 and was $ .2 million in Derivative assets as of December 31, 2017 . The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 1,871,936 $ 3,792 $ 50,992 Offsetting upstream interest rate contracts 1,871,936 14,182 2,608 Debt Hedging Hedging Instruments: Interest rate swaps $ 900,000 $ 189 N/A Hedged Items: Term borrowings: Par N/A N/A $ 900,000 Cumulative fair value hedging adjustments N/A N/A (21,782 ) Unamortized premium/(discount) and issuance costs N/A N/A (2,699 ) Total carrying value N/A N/A 875,519 December 31, 2017 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 1,608,912 $ 11,644 $ 19,780 Offsetting upstream interest rate contracts 1,608,912 18,473 11,019 Debt Hedging Hedging Instruments: Interest rate swaps $ 900,000 $ 371 N/A Hedged Items: Term borrowings: Par N/A N/A $ 900,000 Cumulative fair value hedging adjustments N/A N/A (13,472 ) Unamortized premium/(discount) and issuance costs N/A N/A (3,910 ) Total carrying value N/A N/A $ 882,618 The following table summarizes gains/(losses) on FHN’s derivatives associated with interest rate risk management activities for the three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Gains/(Losses) Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts (a) $ (10,620 ) $ (180 ) $ (39,803 ) $ 643 Offsetting upstream interest rate contracts (a) 10,620 180 39,803 (643 ) Debt Hedging Hedging Instruments: Interest rate swaps (b) $ (246 ) $ (966 ) $ (8,386 ) $ (1,958 ) Hedged Items: Term borrowings (b) (c) 240 941 8,310 1,870 (a) Gains/losses included in All other expense within the Consolidated Condensed Statements of Income. (b) Gains/losses included in the Interest expense for 2018 and All other expense for 2017 within the Consolidated Condensed Statements 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 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, FTB 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 September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate swaps $ 900,000 $ 373 N/A Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 900,000 N/A December 31, 2017 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate swaps $ 900,000 $ 942 N/A 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 three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Gains/(Losses) Cash Flow Hedges Hedging Instruments: Interest rate swaps (a) $ (2,257 ) $ (1,190 ) $ (17,788 ) $ (800 ) Gain/(loss) recognized in Other comprehensive income/(loss) (2,517 ) (91 ) (14,612 ) 1,906 Gain/(loss) reclassified from AOCI into Interest income 771 (643 ) 1,079 (2,399 ) (a) Approximately $10.6 million of pre-tax losses 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. This settlement is subject to court approval and contains opt out provisions for individual plaintiffs as well as a termination option if opt outs exceed a specified threshold. 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 FTBNA. FHN has not received or paid collateral related to this contract. As of September 30, 2018 and December 31, 2017, the derivative liabilities associated with the sales of Visa Class B shares were $34.2 million and $5.6 million , respectively. $28.1 million of the value at September 30, 2018 relates to the transaction executed in third quarter 2018. See the Visa Matters section of Note 10 - Contingencies and Other Disclosures for more information regarding FHN’s Visa shares. See Note 16 - 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 September 30, 2018 and December 31, 2017 , these loans were valued at $10.6 million and $1.5 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 Condensed 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 Condensed 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 FTBNA is lowered, FHN could be required to post additional collateral with the counterparties. Conversely, if the credit rating of FHN and/or FTBNA 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 FTBNA 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 $22.0 million of assets and $57.7 million of liabilities on September 30, 2018 , and $23.3 million of assets and $34.5 million of liabilities on December 31, 2017 . As of September 30, 2018 and December 31, 2017 , FHN had received collateral of $92.3 million and $119.3 million and posted collateral of $20.4 million and $18.9 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 FTBNA’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 $18.1 million of assets and $54.5 million of liabilities on September 30, 2018 , and $22.8 million of assets and $19.4 million of liabilities on December 31, 2017 . As of September 30, 2018 and December 31, 2017 , FHN had received collateral of $88.2 million and $118.6 million and posted collateral of $20.9 million and $6.7 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 Condensed Statements of Condition as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 (b) $ 34,414 $ — $ 34,414 $ (8,590 ) $ (25,156 ) $ 668 December 31, 2017 (b) 71,458 — 71,458 (17,278 ) (51,271 ) 2,909 (a) Included in Derivative assets on the Consolidated Condensed Statements of Condition. As of September 30, 2018 and December 31, 2017 , $20.1 million and $10.2 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 Condensed Statements of Condition as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 (b) $ 117,241 $ — $ 117,241 $ (8,590 ) $ (65,354 ) $ 43,297 December 31, 2017 (b) 69,842 — 69,842 (17,278 ) (51,801 ) 763 (a) Included in Derivative liabilities on the Consolidated Condensed Statements of Condition. As of September 30, 2018 and December 31, 2017 , $53.1 million and $15.2 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	9 Months Ended
	Sep. 30, 2018
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 Condensed 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 Condensed Statements of Condition and collateral pledged by counterparties as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 $ 687,437 $ — $ 687,437 $ (1,017 ) $ (681,110 ) $ 5,310 December 31, 2017 725,609 — 725,609 (259 ) (720,036 ) 5,314 The following table provides details of Securities sold under agreements to repurchase as presented on the Consolidated Condensed Statements of Condition and collateral pledged by FHN as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 $ 678,510 $ — $ 678,510 $ (1,017 ) $ (677,125 ) $ 368 December 31, 2017 656,602 — 656,602 (259 ) (656,216 ) 127 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 September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 17,555 $ — $ 17,555 Government agency issued MBS 314,231 5,529 319,760 Government agency issued CMO 49,553 2,413 51,966 Government guaranteed loans (SBA and USDA) 289,229 — 289,229 Total Securities sold under agreements to repurchase $ 670,568 $ 7,942 $ 678,510 December 31, 2017 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 13,830 $ — $ 13,830 Government agency issued MBS 424,821 5,365 430,186 Government agency issued CMO 54,037 3,666 57,703 Government guaranteed loans (SBA and USDA) 154,883 — 154,883 Total Securities sold under agreements to repurchase $ 647,571 $ 9,031 $ 656,602

Fair Value of Assets & Liabilit

Fair Value of Assets & Liabilities	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Assets & Liabilities	Fair Value of Assets & 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. Transfers between fair value levels are recognized at the end of the fiscal quarter in which the associated change in inputs occurs. Recurring Fair Value Measurements The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 : September 30, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 121,490 $ — $ 121,490 Government agency issued MBS — 235,403 — 235,403 Government agency issued CMO — 568,344 — 568,344 Other U.S. government agencies — 43,642 — 43,642 States and municipalities — 54,669 — 54,669 Corporates and other debt — 866,128 — 866,128 Equity, mutual funds, and other — 39,723 — 39,723 Total trading securities—fixed income — 1,929,399 — 1,929,399 Trading securities—mortgage banking — — 1,592 1,592 Loans held-for-sale (elected fair value) — 182 16,236 16,418 Securities available-for-sale: U.S. treasuries — 98 — 98 Government agency issued MBS — 2,414,877 — 2,414,877 Government agency issued CMO — 1,991,184 — 1,991,184 Other U.S. government agencies — 113,088 — 113,088 States and municipalities — 23,701 — 23,701 Corporates and other debt — 55,074 — 55,074 Interest-only strips (elected fair value) — — 10,361 10,361 Total securities available-for-sale — 4,598,022 10,361 4,608,383 Other assets: Deferred compensation mutual funds 40,912 — — 40,912 Equity, mutual funds, and other 22,141 — — 22,141 Derivatives, forwards and futures 20,013 — — 20,013 Derivatives, interest rate contracts — 34,333 — 34,333 Derivatives, other — 130 — 130 Total other assets 83,066 34,463 — 117,529 Total assets $ 83,066 $ 6,562,066 $ 28,189 $ 6,673,321 Trading liabilities—fixed income: U.S. treasuries $ — $ 574,897 $ — $ 574,897 States and municipalities — 110 — 110 Corporates and other debt — 164,687 — 164,687 Total trading liabilities—fixed income — 739,694 — 739,694 Other liabilities: Derivatives, forwards and futures 18,770 — — 18,770 Derivatives, interest rate contracts — 117,236 — 117,236 Derivatives, other — 106 34,212 34,318 Total other liabilities 18,770 117,342 34,212 170,324 Total liabilities $ 18,770 $ 857,036 $ 34,212 $ 910,018 The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 : December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 128,995 $ — $ 128,995 Government agency issued MBS — 227,038 — 227,038 Government agency issued CMO — 275,014 — 275,014 Other U.S. government agencies — 54,699 — 54,699 States and municipalities — 34,573 — 34,573 Corporates and other debt — 693,877 — 693,877 Equity, mutual funds, and other — (2 ) — (2 ) Total trading securities—fixed income — 1,414,194 — 1,414,194 Trading securities—mortgage banking — — 2,151 2,151 Loans held-for-sale — 1,955 18,926 20,881 Securities available-for-sale: U.S. treasuries — 99 — 99 Government agency issued MBS — 2,577,376 — 2,577,376 Government agency issued CMO — 2,269,858 — 2,269,858 Corporates and other debt — 55,782 — 55,782 Interest-only strips — — 1,270 1,270 Equity, mutual funds, and other 27,017 — — 27,017 Total securities available-for-sale 27,017 4,903,115 1,270 4,931,402 Other assets: Deferred compensation assets 39,822 — — 39,822 Derivatives, forwards and futures 10,161 — — 10,161 Derivatives, interest rate contracts — 71,473 — 71,473 Total other assets 49,983 71,473 — 121,456 Total assets $ 77,000 $ 6,390,737 $ 22,347 $ 6,490,084 Trading liabilities—fixed income: U.S. treasuries $ — $ 506,679 $ — $ 506,679 Corporates and other debt — 131,836 — 131,836 Total trading liabilities—fixed income — 638,515 — 638,515 Other liabilities: Derivatives, forwards and futures 9,535 — — 9,535 Derivatives, interest rate contracts — 69,842 — 69,842 Derivatives, other — 39 5,645 5,684 Total other liabilities 9,535 69,881 5,645 85,061 Total liabilities $ 9,535 $ 708,396 $ 5,645 $ 723,576 Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the three months ended September 30, 2018 and 2017 , on a recurring basis are summarized as follows: Three Months Ended September 30, 2018 (Dollars in thousands) Trading securities Interest- only strips- AFS Loans held- for-sale Net derivative liabilities Balance on July 1, 2018 $ 1,724 $ 5,787 $ 16,718 $ (9,425 ) Total net gains/(losses) included in: Net income 33 (456 ) 277 (529 ) Purchases — — — (28,100 ) (e) Sales — (2,034 ) — — Settlements (165 ) — (759 ) 3,842 Net transfers into/(out of) Level 3 — 7,064 (b) — (d) — Balance on September 30, 2018 $ 1,592 $ 10,361 $ 16,236 $ (34,212 ) Net unrealized gains/(losses) included in net income $ (3 ) (a) $ (215 ) (c) $ 277 (a) $ (530 ) (f) Three Months Ended September 30, 2017 (Dollars in thousands) Trading securities Interest-only strips-AFS Loans held-for-sale Net derivative liabilities Balance on July 1, 2017 $ 2,464 $ 1,163 $ 20,587 $ (5,700 ) Total net gains/(losses) included in: Net income 92 (160 ) 390 (129 ) Purchases — — 43 — Settlements (251 ) — (939 ) 299 Net transfers into/(out of) Level 3 — 2,120 (b) — (d) — Balance on September 30, 2017 $ 2,305 $ 3,123 $ 20,081 $ (5,530 ) Net unrealized gains/(losses) included in net income $ 62 (a) $ (72 ) (c) $ 390 (a) $ (129 ) (f) (a) Primarily included in mortgage banking income on the Consolidated Condensed 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 Condensed 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) Increase related to newly executed Visa-related derivatives, see Note 14- Derivatives for additional discussion. (f) Included in Other expense. Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the nine months ended September 30, 2018 and 2017 , on a recurring basis are summarized as follows: Nine Months Ended September 30, 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 173 840 986 (4,904 ) Purchases — — 62 (28,100 ) (e) Sales — (11,227 ) — — Settlements (732 ) — (3,382 ) 4,437 Net transfers into/(out of) Level 3 — 19,478 (b) (356 ) (d) — Balance on September 30, 2018 $ 1,592 $ 10,361 $ 16,236 $ (34,212 ) Net unrealized gains/(losses) included in net income $ 59 (a) $ (279 ) (c) $ 986 (a) $ (4,904 ) (f) Nine Months Ended September 30, 2017 (Dollars in thousands) Trading Interest-only-strips- AFS Loans held- Net derivative Balance on January 1, 2017 $ 2,573 $ — $ 21,924 $ (6,245 ) Total net gains/(losses) included in: Net income 380 107 1,722 (179 ) Purchases — 1,413 118 — Sales — (3,291 ) — — Settlements (648 ) — (3,340 ) 894 Net transfers into/(out of) Level 3 — 4,894 (b) (343 ) (d) — Balance on September 30, 2017 $ 2,305 $ 3,123 $ 20,081 $ (5,530 ) Net unrealized gains/(losses) included in net income $ 264 (a) $ (122 ) (c) $ 1,722 (a) $ (179 ) (f) (a) Primarily included in mortgage banking income on the Consolidated Condensed 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 Condensed 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) Increase related to newly executed Visa-related derivatives, see Note 14- Derivatives for additional discussion. (f) Included in Other expense. 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 September 30, 2018 , and December 31, 2017 , respectively, the following tables provide the level of valuation assumptions used to determine each adjustment and the related carrying value. Carrying value at September 30, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held-for-sale—SBAs and USDA $ — $ 618,142 $ 1,018 $ 619,160 Loans held-for-sale—first mortgages — — 542 542 Loans, net of unearned income (a) — — 26,995 26,995 OREO (b) — — 25,726 25,726 Other assets (c) — — 23,329 23,329 Carrying value at December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held-for-sale—SBAs and USDA $ — $ 465,504 $ 1,473 $ 466,977 Loans held-for-sale—first mortgages — — 618 618 Loans, net of unearned income (a) — — 26,666 26,666 OREO (b) — — 39,566 39,566 Other assets (c) — — 26,521 26,521 (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. (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. For assets measured on a nonrecurring basis which were still held on the consolidated balance sheet at period end, the following table provides information about the fair value adjustments recorded during the three and nine months ended September 30, 2018 and 2017 : Net gains/(losses) Net gains/(losses) (Dollars in thousands) 2018 2017 2018 2017 Loans held-for-sale—SBAs and USDA $ (1,213 ) $ (86 ) $ (2,464 ) $ (1,259 ) Loans held-for-sale—first mortgages 3 6 7 22 Loans, net of unearned income (a) 363 (2,388 ) 1,020 (1,456 ) OREO (b) (776 ) (41 ) (2,198 ) (662 ) Other assets (c) (1,370 ) (762 ) (3,586 ) (2,646 ) $ (2,993 ) $ (3,271 ) $ (7,221 ) $ (6,001 ) (a) Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents 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 third and second quarters of 2018, FHN recognized $.7 million and $1.3 million , respectively, of impairments of long-lived assets in its corporate segment primarily related to optimization efforts for its facilities. In fourth quarter 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 utilize its branch locations more efficiently, including integration with branches acquired from CBF. $1.0 million of the fourth quarter 2017 impairments in the corporate segment were reversed in third quarter 2018 based on the disposition price for the applicable location. The affected branch locations represented a mixture of owned and leased sites. The fair values of owned sites were determined using estimated sales prices from sales contract or appraisals less estimated costs to sell. The fair values of leased sites 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. In third quarter 2017, FHN’s Corporate segment recognized $ 2.0 million of impairments on long-lived technology assets associated with the transition to expanded processing capacity that will be required upon completion of the merger with CBF. The fair values of the assets impaired were determined using a discounted cash flow approach which reflected short estimated remaining lives and considered estimated salvage values. The measurement methodologies are considered Level 3 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 September 30, 2018 and December 31, 2017 : (Dollars in thousands) Level 3 Class Fair Value at Valuation Techniques Unobservable Input Values Utilized Available-for-sale- securities SBA-interest only strips $ 10,361 Discounted cash flow Constant prepayment rate 11% Bond equivalent yield 13%- 18% Loans held-for-sale - residential real estate 16,778 Discounted cash flow Prepayment speeds - First mortgage 2% - 11% Prepayment speeds - HELOC 5% - 12% Foreclosure losses 50% - 70% Loss severity trends - First mortgage 2% - 25% of UPB Loss severity trends - HELOC 50% - 100% of UPB Loans held-for-sale- unguaranteed interest in SBA loans 1,018 Discounted cash flow Constant prepayment rate 8% - 12% Bond equivalent yield 9% Derivative liabilities, other 34,212 Discounted cash flow Visa covered litigation resolution amount $5.2 billion - $5.8 billion Probability of resolution scenarios 20% - 30% Time until resolution 24- 48 months Loans, net of unearned income (a) 26,995 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value Financial Statements/Auction values adjustment 0% - 25% of reported value OREO (b) 25,726 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal Other assets (c) 23,329 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal (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. (Dollars in thousands) Level 3 Class Fair Value at Valuation Techniques Unobservable Input Values Utilized Available-for-sale- securities SBA-interest only strips $ 1,270 Discounted cash flow Constant prepayment rate 10% - 11% Bond equivalent yield 17% Loans held-for-sale - residential real estate 19,544 Discounted cash flow Prepayment speeds - First mortgage 2% - 12% Prepayment speeds - HELOC 5% - 12% Foreclosure losses 50% - 70% Loss severity trends - First mortgage 5% - 30% of UPB Loss severity trends - HELOC 15% - 100% of UPB Loans held-for-sale- unguaranteed interest in SBA loans 1,473 Discounted cash flow Constant prepayment rate 8% - 12% Bond equivalent yield 9% - 10% Derivative liabilities, other 5,645 Discounted cash flow Visa covered litigation resolution amount $4.4 billion - $5.2 billion Probability of resolution scenarios 10% - 30% Time until resolution 18 - 48 months Loans, net of unearned income (a) 26,666 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value Financial Statements/Auction values adjustment 0% - 25% of reported value OREO (b) 39,566 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal Other assets (c) 26,521 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal (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. 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. Fair value measurements are reviewed at least quarterly by FHN’s Corporate Accounting Department. 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. The valuation inputs and process are discussed with senior and executive management when significant events affecting the estimate of fair value occur. Inputs are compared to information obtained from the public issuances and filings of Visa, Inc. as well as public information released by other institutions that have similar derivatives. 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. Multiple appraisal firms are utilized to ensure that estimated values are consistent between firms. This process occurs within FHN’s Credit Risk Management (commercial) and Default Servicing functions (primarily consumer). The Credit Risk Management Committee reviews dispositions and additions of OREO annually. Back testing is performed during the year through comparison to ultimate disposition values. 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. Unusual valuation adjustments and the associated triggering events are discussed with senior and executive management when appropriate. A portfolio review is conducted annually, with the assistance of a third party, to assess the reasonableness of current valuations. 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. September 30, 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 $ 16,418 $ 23,897 $ (7,479 ) Nonaccrual loans 4,483 8,360 (3,877 ) Loans 90 days or more past due and still accruing — — — December 31, 2017 (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 $ 20,881 $ 29,755 $ (8,874 ) Nonaccrual loans 5,783 10,881 (5,098 ) Loans 90 days or more past due and still accruing — — — 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: Three Months Ended Nine months ended (Dollars in thousands) 2018 2017 2018 2017 Changes in fair value included in net income: Mortgage banking noninterest income Loans held-for-sale $ 277 $ 390 $ 986 $ 1,722 For the three months ended September 30, 2018 , residential real estate loans held-for-sale included an insignificant amount of gains in pretax earnings that are attributable to change in instruments-specific credit risk. For the three months ended September 30, 2017 , the amount for residential real estate loans held-for-sale included gains of $.1 million , in pretax earnings that are attributable to changes in instruments-specific credit risk. For the nine months ended September 30, 2018 , and 2017 , the amounts for the real estate loans held-for-sale included gains of $.3 million and $ .5 million , respectively, in pretax earnings that are attributable to changes in instruments-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 Condensed 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 Condensed Statements of Condition and for estimating the fair value of financial instruments for which fair value is disclosed. 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 current market pricing for similar assets with ad

Financial Information (Policies

Financial Information (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	Basis of Accounting. The unaudited interim consolidated condensed 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. In the opinion of management, all necessary adjustments have been made for a fair presentation of financial position and results of operations for the periods presented. These adjustments are of a normal recurring nature unless otherwise disclosed in this Quarterly Report on Form 10-Q. The operating results for the interim 2018 period are not necessarily indicative of the results that may be expected going forward. For further information, refer to the audited consolidated financial statements in Exhibit 13 to FHN’s Annual Report on Form 10-K for the year ended December 31, 2017.
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. 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. 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. 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. 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. 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.
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 16 - 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 were classified as AFS through December 31, 2017. Subsequently, all equity securities are classified in Other assets. National banks chartered by the federal government are, by law, 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. 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.
Summary of Accounting Changes and Accounting Changes Issued But Not Currently Effective	Summary of Accounting Changes. Effective January 1, 2018, FHN adopted the provisions of ASU 2014-09, “Revenue from Contracts with Customers,” and all related amendments to all contracts using a modified retrospective transaction method. ASU 2014-09 does not change revenue recognition for financial assets. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This is accomplished through a five-step recognition framework involving 1) the identification of contracts with customers, 2) identification of performance obligations, 3) determination of the transaction price, 4) allocation of the transaction price to the performance obligations and 5) recognition of revenue as performance obligations are satisfied. Additionally, qualitative and quantitative information is required for disclosure regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In February 2016, the FASB issued ASU 2016-08, “Principal versus Agent Considerations,” which provides additional guidance on whether an entity should recognize revenue on a gross or net basis, based on which party controls the specified good or service before that good or service is transferred to a customer. In April 2016, the FASB issued ASU 2016-10, “Identifying Performance Obligations and Licensing,” which clarifies the original guidance included in ASU 2014-09 for identification of the goods or services provided to customers and enhances the implementation guidance for licensing arrangements. ASU 2016-12, “Narrow-Scope Improvements and Practical Expedients,” was issued in May 2016 to provide additional guidance for the implementation and application of ASU 2014-09. “Technical Corrections and Improvements” ASU 2016-20 was issued in December 2016 and provides further guidance on certain issues. FHN elected to adopt the provisions of the revenue recognition standards through the cumulative effect alternative and determined that there were no significant effects on the timing of recognition, which resulted in no cumulative effect adjustment being required. Beginning in first quarter 2018, in situations where FHN's broker-dealer operations serve as the lead underwriter, the associated revenues and expenses are presented gross. The effect on 2018 revenues and expenses is not expected to be significant. Effective January 1, 2018, FHN adopted the provisions of ASU 2017-05, “Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” through the cumulative effect approach. ASU 2017-05 clarifies the meaning and application of the term "in substance nonfinancial asset" in transactions involving both financial and nonfinancial assets. If substantially all of the fair value of the assets that are promised to the counterparty in a contract are concentrated in nonfinancial assets, then all of the financial assets promised to the counterparty are in substance nonfinancial assets within the scope of revenue recognition guidance for nonfinancial assets. ASU 2017-05 also clarifies that an entity should identify each distinct nonfinancial asset or in substance nonfinancial asset promised to a counterparty and derecognize each asset when a counterparty obtains control of it with the amount of revenue recognized based on the allocation guidance provided in ASU 2014-09. ASU 2017-05 also requires an entity to derecognize a distinct nonfinancial asset or distinct in substance nonfinancial asset in a partial sale transaction when it 1) does not have (or ceases to have) a controlling financial interest in the legal entity that holds the asset in accordance with Topic 810 and 2) transfers control of the asset in accordance with the provisions of ASU 2014-09. Once an entity transfers control of a distinct nonfinancial asset or distinct in substance nonfinancial asset, it is required to measure any noncontrolling interest it receives (or retains) at fair value. FHN determined that there were no significant effects on the timing of revenue recognition, which resulted in no cumulative effect adjustment being required. Effective January 1, 2018, FHN adopted the provisions of ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 makes several revisions to the accounting, presentation and disclosure for financial instruments. Equity investments (except those accounted for under the equity method, those that result in consolidation of the investee, and those held by entities subject to specialized industry accounting which already apply fair value through earnings) are required to be measured at fair value with changes in fair value recognized in net income. This excludes FRB and FHLB stock holdings which are specifically exempted from the provisions of ASU 2016-01. An entity may elect to measure equity investments that do not have readily determinable market values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar instruments from the same issuer. ASU 2016-01 also requires a qualitative impairment review for equity investments without readily determinable fair values, with measurement at fair value required if impairment is determined to exist. For liabilities for which fair value has been elected, ASU 2016-01 revises current accounting to record the portion of fair value changes resulting from instrument-specific credit risk within other comprehensive income rather than earnings. FHN has not elected fair value accounting for any existing financial liabilities. Additionally, ASU 2016-01 clarifies that the need for a valuation allowance on a deferred tax asset related to available-for-sale securities should be assessed in combination with all other deferred tax assets rather than being assessed in isolation. ASU 2016-01 also makes several changes to existing fair value presentation and disclosure requirements, including a provision that all disclosures must use an exit price concept in the determination of fair value. Transition is through a cumulative effect adjustment to retained earnings for equity investments with readily determinable fair values. Equity investments without readily determinable fair values, for which the accounting election is made, will have any initial fair value marks recorded through earnings prospectively after adoption. Upon adoption, FHN reclassified $265.9 million of equity investments out of AFS securities to Other assets, leaving only debt securities within the AFS classification. FHN evaluated the nature of its current equity investments (excluding FRB and FHLB stock holdings which are specifically exempted from the provisions of ASU 2016-01) and determined that substantially all qualified for the election available to assets without readily determinable fair values. Accordingly, FHN has applied this election and any future fair value marks for these investments will be recognized through earnings on a prospective basis subsequent to adoption. The requirements of ASU 2016-01 related to assessment of deferred tax assets and disclosure of the fair value of financial instruments did not have a significant effect on FHN because its current accounting and disclosure practices conform to the requirements of ASU 2016-01. Effective January 1, 2018, FHN adopted the provisions of ASU 2016-04, “Recognition of Breakage of Certain Prepaid Stored-Value Products,” which indicates that liabilities related to the sale of prepaid stored-value products are considered financial liabilities and should have a breakage estimate applied for estimated unused funds. ASU 2016-04 does not apply to stored-value products that can only be redeemed for cash, are subject to escheatment or are linked to a segregated bank account. The adoption of ASU 2016-04 did not have a significant effect on FHN’s current accounting and disclosure practices. Effective January 1, 2018, FHN adopted the provisions of ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which clarifies multiple cash flow presentation issues including providing guidance as to classification on the cash flow statement for certain cash receipts and cash payments where diversity in practice exists. The adoption of ASU 2016-15 was applied retroactively resulting in proceeds from bank-owned life insurance (“BOLI”) being classified as an investing activity rather than their prior classification as an operating activity. All of these amounts are included in Other assets in the Consolidated Condensed Statement of Condition. The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 (Dollars in thousands) 2017 2016 2015 Proceeds from BOLI $ 160 $ 5,850 $ 11,440 $ 2,740 $ 2,425 Effective January 1, 2018, FHN retroactively adopted the provisions of ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires the disaggregation of the service cost component from the other components of net benefit cost for pension and postretirement plans. Service cost must be included in the same income statement line item as other compensation-related expenses. All other components of net benefit cost are required to be presented in the income statement separately from the service cost component, with disclosure of the line items where these amounts are recorded. FHN’s disclosures for pension and postretirement costs provide details of the service cost and all other components for expenses recognized for its applicable benefit plans. All of these amounts were previously included in Employee compensation, incentives, and benefits expense in the Consolidated Condensed Statements of Income. Upon adoption of ASU 2017-07 FHN reclassified the expense components other than service cost into All other expense and revised its disclosures accordingly. The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 ( Dollars in thousands ) 2017 2016 2015 Net periodic benefit cost reclassified $ 415 $ 1,665 $ 1,946 $ (843 ) $ (1,168 ) Effective January 1, 2018, FHN early adopted the provisions of ASU 2017-08, “Premium Amortization on Purchased Callable Debt Securities,” which shortens the amortization period for securities that have explicit, noncontingent call features that are callable at fixed prices and on preset dates. In contrast to the current requirement for premium amortization to extend to the contractual maturity date, ASU 2017-08 requires the premium to be amortized to the earliest call date. ASU 2017-08 does not change the amortization of discounts, which will continue to be amortized to maturity. The new guidance does not apply to either 1) debt securities where the prepayment date is not preset or the price is not known in advance or 2) debt securities that qualify for amortization based on estimated prepayment rates. The adoption of ASU 2017-08 did not have an effect on FHN's current investments. Effective January 1, 2018, FHN early adopted the provisions of ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities,” which revises the financial reporting for hedging relationships through changes to both the designation and measurement requirements for qualifying hedge relationships and the presentation of hedge results. ASU 2017-12 expands permissible risk component hedging strategies, including the designation of a contractually specified interest rate (e.g., a bank’s prime rate) in hedges of cash flows from variable rate financial instruments. Additionally, ASU 2017-12 makes significant revisions to fair value hedging activities, including the ability to measure the fair value changes for a hedged item solely for changes in the benchmark interest rate, permitting partial-term hedges, limiting consideration of prepayment risk for hedged debt instruments solely to the effects of changes in the benchmark interest rate and allowing for certain hedging strategies to be applied to closed portfolios of prepayable debt instruments. ASU 2017-12 also provides elections for the exclusion of certain portions of a hedging instrument’s change in fair value from the assessment of hedge effectiveness. If elected, the fair value changes of these excluded components may be recognized immediately or recorded into other comprehensive income with recycling into earnings using a rational and systematic methodology over the life of the hedging instrument. Under ASU 2017-12 some of the documentation requirements for hedge accounting relationships are relaxed, but the highly effective threshold has been retained. Hedge designation documentation and a prospective qualitative assessment are still required at hedge inception, but the initial quantitative analysis may be delayed until the end of the quarter the hedge is commenced. If certain criteria are met, an election can be made to perform future effectiveness assessments using a purely qualitative methodology. ASU 2017-12 also revises the income statement presentation requirements for hedging activities. 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 income statement line item 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. ASU 2017-12 also makes revisions to the current disclosure requirements for hedging activities to reflect the presentation of hedging results consistent with the changes to income statement classification and to improve the disclosure of the hedging results on the balance sheet. FHN early adopted the provisions of ASU 2017-12 in the first quarter of 2018. Prospectively, FHN is recording components of hedging results for its fair value and cash flow hedges previously recognized in other expense within either interest income or interest expense. Additionally, FHN made cumulative effect adjustments to the hedged items, accumulated other comprehensive income and retained earnings as of the beginning of 2018. The magnitude of the cumulative effect adjustments and prospective effects were insignificant for FHN’s hedge relationships. Accounting Changes Issued but Not Currently Effective In February 2016, the FASB issued 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. In July 2018, the FASB issued 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. ASU 2016-02 and ASU 2018-11 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. FHN continues to evaluate the impact of ASU 2016-02 on its current accounting and disclosure practices. Upon adoption, FHN intends to utilize the cumulative effect transition alternative provided by ASU 2018-11. FHN also intends to utilize the lease classification practical expedients and the short-term lease exemption upon adoption. FHN currently estimates that adoption of ASU 2016-02 will result in recognition of lease assets of approximately $185 million and lease liabilities of approximately $195 million along with smaller impacts to other balance sheet classifications as well as an after-tax increase in retained earnings of approximately $3 million , primarily reflecting the recognition of deferred gains associated with prior sale-leaseback transactions. Since FHN will elect to determine the discount rate on leases as of the effective date and will also elect to use hindsight in determining remaining lease terms as well as impairments of lease assets resulting from lease abandonments upon adoption, this amount may change based on revisions to the inputs used in calculating this estimated adoption effect. 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. 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. 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 adjusted to reflect the addition 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. Early adoption is permitted in fiscal years beginning after December 15, 2018. FHN continues to evaluate the impact of ASU 2016-13. FHN has met with industry experts, initiated training for key employees associated with the new standard, and defined an initial approach that it is currently testing. FHN has begun developing the formal models and processes that will be required to implement the new standard. In August 2018, the FASB issued ASU 2018-13, “ Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement,” which makes multiple revisions to current disclosures requirements for fair value measurements. ASU 2018-13 removes the disclosure requirements for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for the timing of recognition for transfers between fair value levels and the discussion of valuation processes for Level 3 measurements. Additional disclosure is required for unrealized gains and losses recognized with accumulated other comprehensive income and the weighted average and range of unobservable inputs used in Level 3 measurements. ASU 2018-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption is permitted at an individual level for each removed or modified disclosure while adoption of other changes may be delayed until their effective date. FHN is assessing the effects of ASU 2018-13 on its current fair value disclosures. In August 2018, the FASB issued ASU 2018-14, “Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans,” which makes multiple revisions to the disclosure requirements for defined benefit pension and postretirement plans. ASU 2018-14 removes the disclosure requirements for 1) the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year, 2) the amount and timing of plan assets expected to be returned to the employer, and 3) the effects of a one-percentage-point change in assumed health care cost trend rates on the (a) aggregate of the service and interest cost components of net periodic benefit costs and (b) benefit obligation for postretirement health care benefits. ASU 2018-14 adds disclosures for 1) the weighted-average interest crediting rates for plans with promised interest crediting rates, 2) an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period, 3) the projected benefit obligation ("PBO") and fair value of plan assets for plans with PBOs in excess of plan assets and 4) the accumulated benefit obligation ("ABO") and fair value of plan assets for plans with ABOs in excess of plan assets. ASU 2018-14 is effective for fiscal years ending after December 15, 2020 with full retrospective presentation required. Early adoption is permitted. FHN is assessing the effects of ASU 2018-14 on its current benefit plan disclosures. In August 2018, the FASB issued 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. ASU 2018-15 is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. Adoption may be either fully retrospective or prospective only. FHN is assessing the effects of ASU 2018-15 on it current accounting practices.

Financial Information (Tables)

Financial Information (Tables)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Life Settlement Contracts	The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 (Dollars in thousands) 2017 2016 2015 Proceeds from BOLI $ 160 $ 5,850 $ 11,440 $ 2,740 $ 2,425
Schedule of Net Benefit Costs	The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 ( Dollars in thousands ) 2017 2016 2015 Net periodic benefit cost reclassified $ 415 $ 1,665 $ 1,946 $ (843 ) $ (1,168 ) The components of net periodic benefit cost for the three months ended September 30 are as follows: Pension Benefits Other Benefits (Dollars in thousands) 2018 2017 2018 2017 Components of net periodic benefit cost Service cost $ 11 $ 9 $ 33 $ 26 Interest cost 6,935 7,276 328 328 Expected return on plan assets (8,222 ) (9,230 ) (268 ) (236 ) Amortization of unrecognized: Prior service cost/(credit) — 13 — 23 Actuarial (gain)/loss 3,164 2,380 (108 ) (140 ) Net periodic benefit cost/(credit) $ 1,888 $ 448 $ (15 ) $ 1 The components of net periodic benefit cost for the nine months ended September 30 are as follows: Pension Benefits Other Benefits (Dollars in thousands) 2018 2017 2018 2017 Components of net periodic benefit cost Service cost $ 31 $ 28 $ 100 $ 80 Interest cost 20,908 22,035 982 979 Expected return on plan assets (24,673 ) (27,011 ) (806 ) (710 ) Amortization of unrecognized: Prior service cost/(credit) — 39 — 71 Actuarial (gain)/loss 9,076 7,140 (290 ) (425 ) Net periodic benefit cost/(credit) $ 5,342 $ 2,231 $ (14 ) $ (5 )

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified 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 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 (9,085 ) 124,918 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 (2,351 ) 231,001 OREO 43,077 (9,149 ) (315 ) 33,613 Other assets 617,232 41,320 (c) (7,248 ) (c) 651,304 Total assets acquired $ 10,068,908 $ (190,204 ) $ (20,725 ) $ 9,857,979 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 2,908 67,194 Total liabilities assumed 8,738,129 71,125 2,266 8,811,520 Net assets acquired $ 1,330,779 $ (261,329 ) $ (22,991 ) 1,046,459 Consideration paid: Equity (1,746,724 ) Cash (469,609 ) Total consideration paid (2,216,333 ) Goodwill $ 1,169,874 (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 Condensed Statement of Condition as of September 30, 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.
Merger And Integration Expense	Total CBF merger and integration expense recognized for the three and nine months ended September 30, 2018 and 2017 are presented in the table below: Three Months Ended September 30 Nine Months Ended September 30 (Dollars in thousands) 2018 2017 2018 2017 Professional fees (a) $ 4,594 $ 3,492 $ 19,215 $ 8,004 Employee compensation, incentives and benefits (b) 1,965 232 8,459 232 Contract employment and outsourcing (c) 599 351 3,702 351 Occupancy (d) 100 15 2,321 15 Miscellaneous expense (e) 1,384 130 6,522 234 All other expense (f) 1,548 2,771 41,833 2,786 Total $ 10,190 $ 6,991 $ 82,052 $ 11,622 (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.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of FHN's Investment Securities	The following tables summarize FHN’s investment securities on September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale: U.S. treasuries $ 100 $ — $ (2 ) $ 98 Government agency issued mortgage-backed securities (“MBS”) 2,504,101 2,987 (92,211 ) 2,414,877 Government agency issued collateralized mortgage obligations (“CMO”) 2,077,326 216 (86,358 ) 1,991,184 Other U.S. government agencies 114,053 — (965 ) 113,088 Corporates and other debt 55,495 270 (691 ) 55,074 States and municipalities 24,151 — (450 ) 23,701 $ 4,775,226 $ 3,473 $ (180,677 ) 4,598,022 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (a) 10,361 Total securities available-for-sale (b) $ 4,608,383 Securities held-to-maturity: Corporates and other debt $ 10,000 $ — $ (244 ) $ 9,756 Total securities held-to-maturity $ 10,000 $ — $ (244 ) $ 9,756 (a) SBA-interest only strips are recorded at elected fair value. See Note 16 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.6 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. December 31, 2017 (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale: U.S. treasuries $ 100 $ — $ (1 ) $ 99 Government agency issued MBS 2,580,442 10,538 (13,604 ) 2,577,376 Government agency issued CMO 2,302,439 1,691 (34,272 ) 2,269,858 Corporates and other debt 55,799 23 (40 ) 55,782 Equity and other (a) 265,863 7 — 265,870 $ 5,204,643 $ 12,259 $ (47,917 ) 5,168,985 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (b) 1,270 Total securities available-for-sale (c) $ 5,170,255 Securities held-to-maturity: Corporates and other debt $ 10,000 $ — $ (99 ) $ 9,901 Total securities held-to-maturity $ 10,000 $ — $ (99 ) $ 9,901 (a) Includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $134.6 million . The remainder is money market, mutual funds, and cost method investments. Equity investments were reclassified to Other assets upon adoption of ASU 2016-01 on January 1, 2018. (b) SBA-interest only strips are recorded at elected fair value. See Note 16 - Fair Value of Assets and Liabilities for additional information. (c) Includes $4.0 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 September 30, 2018 are provided below: Held-to-Maturity Available-for-Sale (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Within 1 year $ — $ — $ 15,188 $ 15,025 After 1 year; within 5 years — — 154,460 153,261 After 5 years; within 10 years 10,000 9,756 — 3,741 After 10 years — — 24,151 30,295 Subtotal 10,000 9,756 193,799 202,322 Government agency issued MBS and CMO (a) — — 4,581,427 4,406,061 Total $ 10,000 $ 9,756 $ 4,775,226 $ 4,608,383 (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 three and nine months ended September 30 , 2018. Equity securities are included for periods prior to 2018. Three Months Ended Nine Months Ended September 30 (Dollars in thousands) 2018 2017 2018 2017 Gross gains on sales of securities $ — $ 6 $ 52 $ 455 Gross (losses) on sales of securities — — — — Net gain/(loss) on sales of securities (a) (b) $ — $ 6 $ 52 $ 455 (a) Cash proceeds from the sale of available-for-sale securities for the three and nine months ended September 30, 2018 and 2017 were not material. (b) Nine months ended September 30, 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 September 30, 2018 and December 31, 2017 : As of September 30, 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 1,500,317 (52,607 ) 732,470 (39,604 ) 2,232,787 (92,211 ) Government agency issued CMO 1,000,444 (28,664 ) 963,763 (57,694 ) 1,964,207 (86,358 ) Other U.S. government agencies 113,088 (965 ) — — 113,088 (965 ) Corporates and other debt 40,024 (691 ) — — 40,024 (691 ) States and municipalities 23,701 (450 ) — — 23,701 (450 ) Total temporarily impaired securities $ 2,677,574 $ (83,377 ) $ 1,696,331 $ (97,300 ) $ 4,373,905 $ (180,677 ) As of December 31, 2017 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 $ 99 $ (1 ) $ — $ — $ 99 $ (1 ) Government agency issued MBS 1,455,476 (4,738 ) 331,900 (8,866 ) 1,787,376 (13,604 ) Government agency issued CMO 1,043,987 (7,464 ) 832,173 (26,808 ) 1,876,160 (34,272 ) Corporates and other debt 15,294 (40 ) — — 15,294 (40 ) Total temporarily impaired securities $ 2,514,856 $ (12,243 ) $ 1,164,073 $ (35,674 ) $ 3,678,929 $ (47,917 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2018
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 September 30, 2018 and December 31, 2017 : September 30 December 31 (Dollars in thousands) 2018 2017 Commercial: Commercial, financial, and industrial $ 16,044,145 $ 16,057,273 Commercial real estate 4,237,036 4,214,695 Consumer: Consumer real estate (a) 6,191,183 6,367,755 Permanent mortgage 347,054 399,307 Credit card & other 530,796 619,899 Loans, net of unearned income $ 27,350,214 $ 27,658,929 Allowance for loan losses 185,959 189,555 Total net loans $ 27,164,255 $ 27,469,374 (a) Balances as of September 30, 2018 and December 31, 2017 , include $17.1 million and $24.2 million of restricted real estate loans, respectively. See Note 13—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 three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Balance, beginning of period $ 14,474 $ 4,045 $ 15,623 $ 6,871 Accretion (2,183 ) (642 ) (6,927 ) (2,412 ) Adjustment for payoffs (840 ) (198 ) (2,559 ) (1,232 ) Adjustment for charge-offs (122 ) — (1,046 ) — Adjustment for pool excess recovery (a) (123 ) — (123 ) (222 ) Increase/(decrease) in accretable yield (b) 4,062 (2 ) 10,721 112 Disposals — — (240 ) — Other — — (181 ) 86 Balance, end of period $ 15,268 $ 3,203 $ 15,268 $ 3,203 (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 and amounts 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 September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (Dollars in thousands) Carrying value Unpaid balance Carrying value Unpaid balance Commercial, financial and industrial $ 47,841 $ 53,265 $ 96,598 $ 109,280 Commercial real estate 23,174 26,970 36,107 41,488 Consumer real estate 33,203 37,900 38,176 42,568 Credit card and other 2,229 2,545 5,500 6,351 Total $ 106,447 $ 120,680 $ 176,381 $ 199,687
Information By Class Related To Individually Impaired Loans	The following tables provide information at September 30, 2018 and December 31, 2017 , 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. September 30, 2018 December 31, 2017 (Dollars in thousands) Recorded Unpaid Related Recorded Unpaid Related Impaired loans with no related allowance recorded: Commercial: General C&I $ 21,555 $ 21,910 $ — $ 8,183 $ 17,372 $ — Income CRE 1,611 1,611 — — — — Residential CRE 495 963 — — — — Total $ 23,661 $ 24,484 $ — $ 8,183 $ 17,372 $ — Consumer: HELOC (a) $ 7,874 $ 15,869 $ — $ 9,258 $ 19,193 $ — R/E installment loans (a) 5,891 6,518 — 4,093 4,663 — Permanent mortgage (a) 3,703 6,043 — 5,132 7,688 — Total $ 17,468 $ 28,430 $ — $ 18,483 $ 31,544 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 29,058 $ 29,058 $ 5,103 $ 31,774 $ 38,256 $ 5,119 TRUPs 2,936 3,700 925 3,067 3,700 925 Income CRE 397 397 — 1,612 1,612 49 Residential CRE — — — 795 1,263 83 Total $ 32,391 $ 33,155 $ 6,028 $ 37,248 $ 44,831 $ 6,176 Consumer: HELOC $ 67,086 $ 70,168 $ 11,136 $ 72,469 $ 75,207 $ 14,382 R/E installment loans 38,878 39,581 6,940 43,075 43,827 8,793 Permanent mortgage 71,130 81,971 9,996 79,662 90,934 12,105 Credit card & other 552 552 293 593 593 311 Total $ 177,646 $ 192,272 $ 28,365 $ 195,799 $ 210,561 $ 35,591 Total commercial $ 56,052 $ 57,639 $ 6,028 $ 45,431 $ 62,203 $ 6,176 Total consumer $ 195,114 $ 220,702 $ 28,365 $ 214,282 $ 242,105 $ 35,591 Total impaired loans $ 251,166 $ 278,341 $ 34,393 $ 259,713 $ 304,308 $ 41,767 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance. Three Months Ended September 30 Nine months ended September 30 2018 2017 2018 2017 (Dollars in thousands) Average Interest Average Interest Average Interest Average Interest Impaired loans with no related allowance recorded: Commercial: General C&I $ 23,740 $ 203 $ 5,771 $ — $ 21,506 $ 561 $ 8,706 $ — Income CRE 1,680 12 — — 1,379 37 — — Residential CRE 500 — — — 416 — — — Total $ 25,920 $ 215 $ 5,771 $ — $ 23,301 $ 598 $ 8,706 $ — Consumer: HELOC (a) $ 8,343 $ — $ 10,225 $ — $ 8,878 $ — $ 10,536 $ — R/E installment loans (a) 4,631 — 4,182 — 4,032 — 4,014 — Permanent mortgage (a) 3,949 — 5,693 — 4,638 — 5,701 — Total $ 16,923 $ — $ 20,100 $ — $ 17,548 $ — $ 20,251 $ — Impaired loans with related allowance recorded: Commercial: General C&I $ 16,375 $ — $ 26,144 $ 193 $ 16,038 $ — $ 29,136 $ 597 TRUPs 2,960 — 3,117 — 3,004 — 3,157 — Income CRE 199 5 1,628 11 335 5 1,737 39 Residential CRE — — 1,044 — 133 — 1,210 10 Total $ 19,534 $ 5 $ 31,933 $ 204 $ 19,510 $ 5 $ 35,240 $ 646 Consumer: HELOC $ 68,913 $ 556 $ 74,894 $ 554 $ 70,452 $ 1,711 $ 78,859 $ 1,695 R/E installment loans 39,147 246 47,628 315 40,512 764 49,634 950 Permanent mortgage 71,898 585 79,305 616 74,617 1,737 82,186 1,805 Credit card & other 578 3 452 3 626 9 351 8 Total $ 180,536 $ 1,390 $ 202,279 $ 1,488 $ 186,207 $ 4,221 $ 211,030 $ 4,458 Total commercial $ 45,454 $ 220 $ 37,704 $ 204 $ 42,811 $ 603 $ 43,946 $ 646 Total consumer $ 197,459 $ 1,390 $ 222,379 $ 1,488 $ 203,755 $ 4,221 $ 231,281 $ 4,458 Total impaired loans $ 242,913 $ 1,610 $ 260,083 $ 1,692 $ 246,566 $ 4,824 $ 275,227 $ 5,104 (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 September 30, 2018 and December 31, 2017 : September 30, 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 $ 600,373 $ — $ — $ 418 $ — $ 600,791 3 % $ 64 2 840,685 — — 2,815 37 843,537 4 261 3 730,939 639,378 — 218,170 82 1,588,569 8 242 4 909,454 456,311 — 543,486 121 1,909,372 9 594 5 1,879,972 257,625 36,620 689,740 8,334 2,872,291 14 8,677 6 1,578,359 450,207 90,297 604,757 36,743 2,760,363 14 8,269 7 2,390,220 98,832 52,927 505,988 16,990 3,064,957 15 15,154 8 1,202,328 84,915 4,068 235,595 15,487 1,542,393 7 20,265 9 1,974,390 105,098 45,117 978,148 75,336 3,178,089 15 20,617 10 459,567 — 18,536 45,560 4,266 527,929 3 9,156 11 283,724 — — 52,546 396 336,666 2 8,033 12 275,015 — — 100,868 5,759 381,642 2 6,636 13 288,183 — 5,786 58,840 73 352,882 2 10,711 14,15,16 181,927 — — 9,986 796 192,709 1 17,596 Collectively evaluated for impairment 13,595,136 2,092,366 253,351 4,046,917 164,420 20,152,190 99 126,275 Individually evaluated for impairment 50,613 — 2,936 2,008 495 56,052 — 6,028 Purchased credit-impaired loans 49,743 — — 19,573 3,623 72,939 1 1,926 Total commercial loans $ 13,695,492 $ 2,092,366 $ 256,287 $ 4,068,498 $ 168,538 $ 20,281,181 100 % $ 134,229 (a) Balances presented net of a $20.5 million valuation allowance. Based on the underlying structure of the notes, the highest possible internal grade was “ 13 ” prior to second quarter 2018. In second quarter 2018, this portfolio was re-graded to align with the scorecard grading methodologies which resulted in upgrades to a majority of this portfolio. 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 Condensed Statement of Income. December 31, 2017 (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 $ 536,244 $ — $ — $ 2,500 $ — $ 538,744 3 % $ 70 2 877,635 — — 1,798 69 879,502 4 339 3 582,224 652,982 — 210,073 40 1,445,319 7 272 4 959,581 629,432 — 309,699 — 1,898,712 9 854 5 1,461,632 328,477 — 415,764 2,474 2,208,347 11 7,355 6 1,668,247 335,169 — 456,706 3,179 2,463,301 12 10,495 7 2,257,400 47,720 — 554,590 9,720 2,869,430 14 13,490 8 1,092,994 35,266 — 241,938 6,454 1,376,652 7 21,831 9 2,633,854 70,915 — 1,630,176 61,475 4,396,420 22 9,804 10 373,537 — — 43,297 4,590 421,424 2 8,808 11 226,382 — — 31,785 2,936 261,103 1 6,784 12 409,838 — — 156,717 6,811 573,366 3 5,882 13 202,613 — 303,848 15,707 268 522,436 3 7,265 14,15,16 228,852 — — 6,587 823 236,262 1 24,400 Collectively evaluated for impairment 13,511,033 2,099,961 303,848 4,077,337 98,839 20,091,018 99 117,649 Individually evaluated for impairment 39,957 — 3,067 1,612 795 45,431 — 6,176 Purchased credit-impaired loans 99,407 — — 31,615 4,497 135,519 1 2,813 Total commercial loans $ 13,650,397 $ 2,099,961 $ 306,915 $ 4,110,564 $ 104,131 $ 20,271,968 100 % $ 126,638 (a) Balances presented net of a $25.5 million valuation allowance. Based on the underlying structure of the notes, the highest possible internal grade was “ 13 ” prior to second quarter 2018. In second quarter 2018, this portfolio was re-graded to align with the scorecard grading methodologies which resulted in upgrades to a majority of this portfolio.
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 September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 HELOC R/E Installment Loans Permanent Mortgage HELOC R/E Installment Loans Permanent Mortgage FICO score 740 or greater 60.8 % 71.1 % 51.2 % 60.0 % 73.1 % 46.4 % FICO score 720-739 8.5 9.0 8.5 8.7 8.0 12.8 FICO score 700-719 8.1 6.6 9.0 8.3 6.4 9.2 FICO score 660-699 10.9 8.0 15.9 11.1 7.2 14.8 FICO score 620-659 5.2 2.8 6.5 4.9 2.8 7.3 FICO score less than 620 (a) 6.5 2.5 8.9 7.0 2.5 9.5 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 September 30, 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 $ 13,597,235 $ 9,202 $ 124 $ 13,606,561 $ 25,713 $ 1,284 $ 12,191 $ 39,188 $ 13,645,749 Loans to mortgage companies 2,092,366 — — 2,092,366 — — — — 2,092,366 TRUPs (a) 253,351 — — 253,351 — — 2,936 2,936 256,287 Purchased credit-impaired loans 35,784 384 13,575 49,743 — — — — 49,743 Total commercial (C&I) 15,978,736 9,586 13,699 16,002,021 25,713 1,284 15,127 42,124 16,044,145 Commercial real estate: Income CRE 4,041,797 6,652 — 4,048,449 35 37 404 476 4,048,925 Residential CRE 164,338 47 — 164,385 35 — 495 530 164,915 Purchased credit-impaired loans 21,373 1,718 105 23,196 — — — — 23,196 Total commercial real estate 4,227,508 8,417 105 4,236,030 70 37 899 1,006 4,237,036 Consumer real estate: HELOC 1,495,298 14,582 8,531 1,518,411 48,400 4,038 7,611 60,049 1,578,460 R/E installment loans 4,541,642 8,589 8,008 4,558,239 15,219 2,239 2,692 20,150 4,578,389 Purchased credit-impaired loans 28,475 2,183 3,676 34,334 — — — — 34,334 Total consumer real estate 6,065,415 25,354 20,215 6,110,984 63,619 6,277 10,303 80,199 6,191,183 Permanent mortgage 315,746 4,051 4,935 324,732 12,217 749 9,356 22,322 347,054 Credit card & other: Credit card 193,681 1,292 1,078 196,051 — — — — 196,051 Other 326,672 4,078 718 331,468 93 78 535 706 332,174 Purchased credit-impaired loans 1,007 835 729 2,571 — — — — 2,571 Total credit card & other 521,360 6,205 2,525 530,090 93 78 535 706 530,796 Total loans, net of unearned income $ 27,108,765 $ 53,613 $ 41,479 $ 27,203,857 $ 101,712 $ 8,425 $ 36,220 $ 146,357 $ 27,350,214 (a) TRUPs is presented net of the valuation allowance of $20.5 million . The following table reflects accruing and non-accruing loans by class on December 31, 2017 : 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 $ 13,514,752 $ 8,057 $ 95 $ 13,522,904 $ 1,761 $ 7,019 $ 19,306 $ 28,086 $ 13,550,990 Loans to mortgage companies 2,099,961 — — 2,099,961 — — — — 2,099,961 TRUPs (a) 303,848 — — 303,848 — — 3,067 3,067 306,915 Purchased credit-impaired loans 77,843 2,207 19,357 99,407 — — — — 99,407 Total commercial (C&I) 15,996,404 10,264 19,452 16,026,120 1,761 7,019 22,373 31,153 16,057,273 Commercial real estate: Income CRE 4,077,106 1,240 — 4,078,346 56 — 546 602 4,078,948 Residential CRE 98,844 — — 98,844 — — 791 791 99,635 Purchased credit-impaired loans 31,173 2,686 2,253 36,112 — — — — 36,112 Total commercial real estate 4,207,123 3,926 2,253 4,213,302 56 — 1,337 1,393 4,214,695 Consumer real estate: HELOC 1,743,776 17,744 9,702 1,771,222 40,508 3,626 8,354 52,488 1,823,710 R/E installment loans 4,475,669 7,274 3,573 4,486,516 14,439 1,957 2,603 18,999 4,505,515 Purchased credit-impaired loans 35,356 2,016 1,158 38,530 — — — — 38,530 Total consumer real estate 6,254,801 27,034 14,433 6,296,268 54,947 5,583 10,957 71,487 6,367,755 Permanent mortgage 365,527 3,930 3,460 372,917 13,245 1,052 12,093 26,390 399,307 Credit card & other: Credit card 193,940 1,371 1,053 196,364 — — — — 196,364 Other 415,070 2,666 103 417,839 31 — 165 196 418,035 Purchased credit-impaired loans 2,993 1,693 814 5,500 — — — — 5,500 Total credit card & other 612,003 5,730 1,970 619,703 31 — 165 196 619,899 Total loans, net of unearned income $ 27,435,858 $ 50,884 $ 41,568 $ 27,528,310 $ 70,040 $ 13,654 $ 46,925 $ 130,619 $ 27,658,929 (a) TRUPs is presented net of the valuation allowance of $25.5 million .
Schedule Of Troubled Debt Restructurings Occurring During The Year	The following tables reflect portfolio loans that were classified as TDRs during the three and nine months ended September 30, 2018 and 2017 : Three Months Ended September 30, 2018 Nine Months Ended September 30, 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 1 $ 25,591 $ 25,439 9 $ 27,639 $ 27,190 Total commercial (C&I) 1 25,591 25,439 9 27,639 27,190 Commercial real estate: Income CRE 1 442 442 4 643 637 Total commercial real estate 1 442 442 4 643 637 Consumer real estate: HELOC 15 1,057 1,041 79 7,641 7,580 R/E installment loans 62 4,561 4,356 77 5,944 5,738 Total consumer real estate 77 5,618 5,397 156 13,585 13,318 Permanent mortgage — — — 5 709 713 Credit card & other 12 65 59 80 370 350 Total troubled debt restructurings 91 $ 31,716 $ 31,337 254 $ 42,946 $ 42,208 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (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 — $ — $ — 2 $ 842 $ 836 Total commercial (C&I) — — — 2 842 836 Consumer real estate: HELOC 45 4,451 4,396 107 9,333 9,139 R/E installment loans 15 1,630 1,622 43 3,386 3,306 Total consumer real estate 60 6,081 6,018 150 12,719 12,445 Permanent mortgage 2 34 32 11 2,043 2,028 Credit card & other 37 261 251 66 426 411 Total troubled debt restructurings 99 $ 6,376 $ 6,301 229 $ 16,030 $ 15,720
Schedule Of Troubled Debt Restructurings Within The Previous 12 Months	The following tables present TDRs which re-defaulted during the three and nine months ended September 30, 2018 and 2017 , 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. Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 (Dollars in thousands) Number Recorded Investment Number Recorded Investment Commercial (C&I): General C&I 1 $ 321 2 $ 579 Total commercial (C&I) 1 321 2 579 Consumer real estate: HELOC 1 40 5 204 R/E installment loans — — 1 25 Total consumer real estate 1 40 6 229 Permanent mortgage 3 294 5 699 Credit card & other 13 56 39 212 Total troubled debt restructurings 18 $ 711 52 $ 1,719 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in thousands) Number Recorded Investment Number Recorded Investment Commercial (C&I): General C&I 1 $ 1,763 4 $ 9,770 Total commercial (C&I) 1 1,763 4 9,770 Commercial Real Estate Income CRE 1 88 1 88 Total Commercial real estate 1 88 1 88 Consumer real estate: HELOC — — 4 685 Total consumer real estate — — 4 685 Permanent mortgage 1 89 2 627 Credit card & other 2 12 5 30 Total troubled debt restructurings 5 $ 1,952 16 $ 11,200

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [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 the three and nine months ended September 30, 2018 and 2017 : (Dollars in thousands) C&I Commercial Real Estate Consumer Real Estate Permanent Mortgage Credit Card and Other Total Balance as of July 1, 2018 $ 96,834 $ 33,832 $ 31,769 $ 14,078 $ 8,949 $ 185,462 Charge-offs (1,391 ) (9 ) (2,801 ) (15 ) (5,266 ) (9,482 ) Recoveries 1,052 267 5,302 554 804 7,979 Provision/(provision credit) for loan losses 3,819 (175 ) (7,733 ) (1,137 ) 7,226 2,000 Balance as of September 30, 2018 100,314 33,915 26,537 13,480 11,713 185,959 Balance as of January 1, 2018 $ 98,211 $ 28,427 $ 37,371 $ 15,565 $ 9,981 $ 189,555 Charge-offs (6,753 ) (281 ) (6,193 ) (475 ) (14,271 ) (27,973 ) Recoveries 3,607 348 15,129 1,250 3,043 23,377 Provision/(provision credit) for loan losses 5,249 5,421 (19,770 ) (2,860 ) 12,960 1,000 Balance as of September 30, 2018 100,314 33,915 26,537 13,480 11,713 185,959 Allowance - individually evaluated for impairment 6,028 — 18,076 9,996 293 34,393 Allowance - collectively evaluated for impairment 92,382 33,893 7,331 3,484 11,078 148,168 Allowance - purchased credit-impaired loans 1,904 22 1,130 — 342 3,398 Loans, net of unearned as of September 30, 2018: Individually evaluated for impairment 53,549 2,503 119,729 74,833 552 251,166 Collectively evaluated for impairment 15,940,853 4,211,337 6,037,120 272,221 527,673 26,989,204 Purchased credit-impaired loans 49,743 23,196 34,334 — 2,571 109,844 Total loans, net of unearned income $ 16,044,145 $ 4,237,036 $ 6,191,183 $ 347,054 $ 530,796 $ 27,350,214 Balance as of July 1, 2017 $ 92,379 $ 30,470 $ 46,069 $ 16,398 $ 11,941 $ 197,257 Charge-offs (3,723 ) — (3,601 ) (173 ) (3,173 ) (10,670 ) Recoveries 601 278 6,188 542 671 8,280 Provision/(provision credit) for loan losses 8,948 (1,065 ) (7,717 ) (1,048 ) 882 — Balance as of September 30, 2017 98,205 29,683 40,939 15,719 10,321 194,867 Balance as of January 1, 2017 $ 89,398 $ 33,852 $ 50,357 $ 16,289 $ 12,172 $ 202,068 Charge-offs (6,188 ) (20 ) (11,401 ) (1,499 ) (9,805 ) (28,913 ) Recoveries 2,877 639 17,007 1,933 2,256 24,712 Provision/(provision credit) for loan losses 12,118 (4,788 ) (15,024 ) (1,004 ) 5,698 (3,000 ) Balance as of September 30, 2017 98,205 29,683 40,939 15,719 10,321 194,867 Allowance - individually evaluated for impairment 6,895 126 23,936 12,601 246 43,804 Allowance - collectively evaluated for impairment 88,529 29,557 16,649 3,118 10,075 147,928 Allowance - purchased credit-impaired loans 2,781 — 354 — — 3,135 Loans, net of unearned as of September 30, 2017: Individually evaluated for impairment 32,028 2,320 135,858 84,081 544 254,831 Collectively evaluated for impairment 12,739,091 2,244,895 4,232,564 319,001 349,889 19,885,440 Purchased credit-impaired loans 20,725 3,800 1,295 — — 25,820 Total loans, net of unearned income $ 12,791,844 $ 2,251,015 $ 4,369,717 $ 403,082 $ 350,433 $ 20,166,091

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
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 Condensed Statements of Condition: September 30, 2018 December 31, 2017 (Dollars in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Value Gross Carrying Amount Accumulated Amortization Net Carrying Value Core deposit intangibles (a) $ 157,150 $ (23,148 ) $ 134,002 $ 160,650 $ (8,176 ) $ 152,474 Customer relationships 77,865 (54,404 ) 23,461 77,865 (50,777 ) 27,088 Other (b) 5,622 (1,590 ) 4,032 5,622 (795 ) 4,827 Total $ 240,637 $ (79,142 ) $ 161,495 $ 244,137 $ (59,748 ) $ 184,389 (a) 2018 decrease in gross carrying amounts associated with the sale of two CBF branches and purchase accounting measurement period adjustments related to the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information. (b) 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 September 30, 2018 the estimated aggregated amortization expense is expected to be: (Dollars in thousands) Year Amortization Remainder of 2018 $ 6,471 2019 24,834 2020 21,159 2021 19,547 2022 17,412 2023 16,117
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 Condensed Statements of Condition as of September 30, 2018 and December 31, 2017 . (Dollars in thousands) Regional Banking Fixed Income Total December 31, 2016 $ 93,367 $ 98,004 $ 191,371 Additions (a) — 44,964 44,964 September 30, 2017 $ 93,367 $ 142,968 $ 236,335 December 31, 2017 $ 1,243,885 $ 142,968 $ 1,386,853 Additions (a) 22,969 — 22,969 September 30, 2018 $ 1,266,854 $ 142,968 $ 1,409,822 (a) 2017 increase associated with the Coastal acquisition, 2018 increase associated with measurement period adjustments for the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information.

Other Income and Other Expense

Other Income and Other Expense (Tables)	9 Months Ended
	Sep. 30, 2018
Other Income and Expenses [Abstract]
Other Income And Other Expense	Following is detail of All other income and commissions and All other expense as presented in the Consolidated Condensed Statements of Income: Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 All other income and commissions: Other service charges $ 3,758 $ 2,954 $ 11,609 $ 9,047 ATM and interchange fees 3,263 3,137 9,943 8,998 Dividend income (a) 2,757 — 8,130 — Mortgage banking 2,533 1,354 7,510 3,883 Deferred compensation 1,458 1,128 2,900 4,446 Electronic banking fees 1,309 1,282 3,741 3,911 Letter of credit fees 1,307 1,211 3,851 3,369 Insurance commissions 396 567 1,629 2,042 Gain/(loss) on extinguishment of debt (b) (1 ) (14,329 ) (1 ) (14,329 ) Other 5,875 2,739 16,020 7,684 Total $ 22,655 $ 43 $ 65,332 $ 29,051 All other expense: Travel and entertainment $ 3,988 $ 2,798 $ 12,102 $ 8,308 Other insurance and taxes 2,761 2,396 8,178 7,229 Employee training and dues 1,682 1,198 5,310 4,194 Supplies 1,635 928 5,458 2,884 Non-service components of net periodic pension and post-retirement cost 1,585 454 3,619 1,782 Tax credit investments 1,370 762 3,586 2,646 Customer relations 1,328 1,361 3,749 4,240 OREO 1,256 303 2,174 953 Miscellaneous loan costs 543 757 2,720 2,078 Litigation and regulatory matters (1,541 ) 8,162 609 8,403 Other (c) 11,094 8,994 64,527 29,837 Total $ 25,701 $ 28,113 $ 112,032 $ 72,554 Certain previously reported amounts have been revised to reflect the retroactive effect of the adoption of ASU 2017-07 “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” See Note 1 - Financial Information for additional information. (a) 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 first quarter 2018 these amounts were included in Interest income on the Consolidated Condensed Statements of Income. (b) Loss on extinguishment of debt for three and nine months ended September 30, 2017 relates to the repurchase of equity securities previously included in a financing transaction. (c) Expense increase for the nine months ended September 30, 2018 largely attributable to an increase in acquisition- and integration-related expense primarily associated with the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information.

Components of Other Comprehen_2

Components of Other Comprehensive Income/(Loss) (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [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 three and nine months ended September 30, 2018 and 2017 : (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of July 1, 2018 $ (107,476 ) $ (19,757 ) $ (284,881 ) $ (412,114 ) Net unrealized gains/(losses) (25,924 ) (2,517 ) — (28,441 ) Amounts reclassified from AOCI — 771 2,135 2,906 Other comprehensive income/(loss) (25,924 ) (1,746 ) 2,135 (25,535 ) Balance as of September 30, 2018 $ (133,400 ) $ (21,503 ) $ (282,746 ) $ (437,649 ) Balance as of January 1, 2018 $ (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) (106,522 ) (14,612 ) — (121,134 ) Amounts reclassified from AOCI (39 ) 1,079 5,481 6,521 Other comprehensive income/(loss) (106,561 ) (13,533 ) 5,481 (114,613 ) Balance as of September 30, 2018 $ (133,400 ) $ (21,503 ) $ (282,746 ) $ (437,649 ) (Dollars in thousands) Securities AFS Cash Flow Hedges Pension and Post-retirement Plans Total Balance as of July 1, 2017 $ (9,857 ) $ (1,024 ) $ (226,581 ) $ (237,462 ) Net unrealized gains/(losses) 3,918 (91 ) 490 4,317 Amounts reclassified from AOCI (1 ) (643 ) 1,405 761 Other comprehensive income/(loss) 3,917 (734 ) 1,895 5,078 Balance as of September 30, 2017 $ (5,940 ) $ (1,758 ) $ (224,686 ) $ (232,384 ) Balance as of January 1, 2017 $ (17,232 ) $ (1,265 ) $ (229,157 ) $ (247,654 ) Net unrealized gains/(losses) 11,570 1,906 490 13,966 Amounts reclassified from AOCI (278 ) (2,399 ) 3,981 1,304 Other comprehensive income/(loss) 11,292 (493 ) 4,471 15,270 Balance as of September 30, 2017 $ (5,940 ) $ (1,758 ) $ (224,686 ) $ (232,384 )
Reclassification Out Of Accumulated Other Comprehensive Income	Reclassifications from AOCI, and related tax effects, were as follows: (Dollars in thousands) Three Months Ended Nine Months Ended September 30 Details about AOCI 2018 2017 2018 2017 Affected line item in the statement where net income is presented Securities AFS: Realized (gains)/losses on securities AFS $ — $ (1 ) $ (52 ) $ (450 ) Debt securities gains/(losses), net Tax expense/(benefit) — — 13 172 Provision/(benefit) for income taxes — (1 ) (39 ) (278 ) Cash flow hedges: Realized (gains)/losses on cash flow hedges 1,024 (1,041 ) 1,433 (3,886 ) Interest and fees on loans Tax expense/(benefit) (253 ) 398 (354 ) 1,487 Provision/(benefit) for income taxes 771 (643 ) 1,079 (2,399 ) Pension and Postretirement Plans: Amortization of prior service cost and net actuarial gain/(loss) 2,836 2,277 7,280 6,450 All other expense Tax expense/(benefit) (701 ) (872 ) (1,799 ) (2,469 ) Provision/(benefit) for income taxes 2,135 1,405 5,481 3,981 Total reclassification from AOCI $ 2,906 $ 761 $ 6,521 $ 1,304

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
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: Three Months Ended Nine Months Ended (Dollars and shares in thousands, except per share data) 2018 2017 2018 2017 Net income/(loss) $ 274,716 $ 71,769 $ 455,702 $ 225,361 Net income attributable to noncontrolling interest 2,883 2,883 8,555 8,555 Net income/(loss) attributable to controlling interest 271,833 68,886 447,147 216,806 Preferred stock dividends 1,550 1,550 4,650 4,650 Net income/(loss) available to common shareholders $ 270,283 $ 67,336 $ 442,497 $ 212,156 Weighted average common shares outstanding—basic 324,406 233,749 325,341 233,438 Effect of dilutive securities 2,846 2,591 3,304 2,934 Weighted average common shares outstanding—diluted 327,252 236,340 328,645 236,372 Net income/(loss) per share available to common shareholders $ 0.83 $ 0.29 $ 1.36 $ 0.91 Diluted income/(loss) per share available to common shareholders $ 0.83 $ 0.28 $ 1.35 $ 0.90
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: Three Months Ended Nine Months Ended (Shares in thousands) 2018 2017 2018 2017 Stock options excluded from the calculation of diluted EPS 2,251 2,595 2,316 2,490 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 23.67 $ 25.00 $ 24.43 $ 25.70 Other equity awards excluded from the calculation of diluted EPS 1,605 1,002 538 325

Contingencies and Other Discl_2

Contingencies and Other Disclosures (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Participating Mortgage Loans	Mortgage-Related Glossary Agencies the two GSEs and Ginnie Mae HELOC home equity line of credit certificates securities sold to investors representing interests in mortgage loan securitizations HUD Dept. of Housing and Urban Development DOJ U.S. Department of Justice LTV loan-to-value, a ratio of the loan amount divided by the home value DRA definitive resolution agreement with a GSE MI private mortgage insurance, insuring against borrower payment default Fannie Mae, Fannie, FNMA Federal National Mortgage Association MSR mortgage servicing rights FH proprietary securitization securitization of mortgages sponsored by FHN under its First Horizon brand nonconforming loans loans that did not conform to Agency program requirements FHA Federal Housing Administration other whole loans sold mortgage loans sold to private, non-Agency purchasers Freddie Mac, Freddie, FHLMC Federal Home Loan Mortgage Corporation 2008 platform sale, platform sale FHN’s sale of its national mortgage origination and servicing platforms in 2008 Ginnie Mae, Ginnie, GNMA Government National Mortgage Association pipeline or active pipeline pipeline of mortgage repurchase, make-whole, & certain related claims against FHN GSEs Fannie Mae and Freddie Mac VA Veterans Administration

Pension, Savings, and Other E_2

Pension, Savings, and Other Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2018
Retirement Benefits [Abstract]
Schedule of Components of Net Periodic Benefit Cost	The amounts reclassified are presented in the table below. Three Months Ended Nine Months Ended Fiscal Years Ended December 31 ( Dollars in thousands ) 2017 2016 2015 Net periodic benefit cost reclassified $ 415 $ 1,665 $ 1,946 $ (843 ) $ (1,168 ) The components of net periodic benefit cost for the three months ended September 30 are as follows: Pension Benefits Other Benefits (Dollars in thousands) 2018 2017 2018 2017 Components of net periodic benefit cost Service cost $ 11 $ 9 $ 33 $ 26 Interest cost 6,935 7,276 328 328 Expected return on plan assets (8,222 ) (9,230 ) (268 ) (236 ) Amortization of unrecognized: Prior service cost/(credit) — 13 — 23 Actuarial (gain)/loss 3,164 2,380 (108 ) (140 ) Net periodic benefit cost/(credit) $ 1,888 $ 448 $ (15 ) $ 1 The components of net periodic benefit cost for the nine months ended September 30 are as follows: Pension Benefits Other Benefits (Dollars in thousands) 2018 2017 2018 2017 Components of net periodic benefit cost Service cost $ 31 $ 28 $ 100 $ 80 Interest cost 20,908 22,035 982 979 Expected return on plan assets (24,673 ) (27,011 ) (806 ) (710 ) Amortization of unrecognized: Prior service cost/(credit) — 39 — 71 Actuarial (gain)/loss 9,076 7,140 (290 ) (425 ) Net periodic benefit cost/(credit) $ 5,342 $ 2,231 $ (14 ) $ (5 )

Business Segment Information (T

Business Segment Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Amounts Of Consolidated Revenue, Expense, Tax And Assets	The following table reflects the amounts of consolidated revenue, expense, tax, and average assets for each segment for the three and nine months ended September 30 : Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Consolidated Net interest income $ 305,700 $ 209,817 $ 917,805 $ 600,226 Provision/(provision credit) for loan losses 2,000 — 1,000 (3,000 ) Noninterest income (a) 348,972 112,417 612,514 357,029 Noninterest expense 294,031 236,869 940,064 676,991 Income/(loss) before income taxes 358,641 85,365 589,255 283,264 Provision/(benefit) for income taxes (b) 83,925 13,596 133,553 57,903 Net income/(loss) $ 274,716 $ 71,769 $ 455,702 $ 225,361 Average assets $ 40,077,033 $ 28,874,827 $ 40,199,487 $ 28,852,679 Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Regional Banking Net interest income $ 302,448 $ 209,100 $ 902,546 $ 604,075 Provision/(provision credit) for loan losses 8,045 8,552 17,428 11,910 Noninterest income 79,857 64,370 240,093 188,089 Noninterest expense 207,591 150,445 619,283 451,135 Income/(loss) before income taxes 166,669 114,473 505,928 329,119 Provision/(benefit) for income taxes 39,101 41,191 118,929 118,771 Net income/(loss) $ 127,568 $ 73,282 $ 386,999 $ 210,348 Average assets $ 28,659,158 $ 19,158,852 $ 28,450,747 $ 18,519,999 Fixed Income Net interest income $ 9,048 $ 5,985 $ 26,686 $ 12,126 Noninterest income 41,123 55,803 125,091 161,833 Noninterest expense 47,306 53,136 145,635 155,865 Income/(loss) before income taxes 2,865 8,652 6,142 18,094 Provision/(benefit) for income taxes 532 2,970 988 5,929 Net income/(loss) $ 2,333 $ 5,682 $ 5,154 $ 12,165 Average assets $ 3,247,016 $ 2,586,773 $ 3,326,118 $ 2,388,740 Corporate Net interest income/(expense) $ (15,415 ) $ (13,769 ) $ (48,651 ) $ (42,408 ) Noninterest income (a) 222,619 (9,476 ) 240,665 2,219 Noninterest expense 33,323 23,926 152,797 65,365 Income/(loss) before income taxes 173,881 (47,171 ) 39,217 (105,554 ) Provision/(benefit) for income taxes (b) 40,529 (34,167 ) 4,253 (82,758 ) Net income/(loss) $ 133,352 $ (13,004 ) $ 34,964 $ (22,796 ) Average assets $ 6,904,585 $ 5,697,894 $ 6,990,484 $ 6,421,643 Non-Strategic Net interest income $ 9,619 $ 8,501 $ 37,224 $ 26,433 Provision/(provision credit) for loan losses (6,045 ) (8,552 ) (16,428 ) (14,910 ) Noninterest income (c) 5,373 1,720 6,665 4,888 Noninterest expense 5,811 9,362 22,349 4,626 Income/(loss) before income taxes 15,226 9,411 37,968 41,605 Provision/(benefit) for income taxes 3,763 3,602 9,383 15,961 Net income/(loss) $ 11,463 $ 5,809 $ 28,585 $ 25,644 Average assets $ 1,266,274 $ 1,431,308 $ 1,432,138 $ 1,522,297 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Three and nine months ended September 30, 2018 includes a $212.9 million pre-tax gain from the sale of Visa Class B Shares. Three and nine months ended September 30, 2017 includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction. (b) Provision/(benefit) for income taxes for consolidated results and the Corporate segment for the three and nine months ended September 30, 2017 was affected by a decline in the effective tax rate in 2017 primarily related to the reversal of the valuation allowance for the deferred tax asset related to its 2012 federal capital loss carry forward based on capital gain transactions initiated in second quarter 2017. See Note 15 - Income Taxes in the Notes to Consolidated Financial Statements on FHN’s Form 10-K for the year ended December 31, 2016 for additional information related to FHN’s valuation allowance related to its capital loss carryforward. (c) Three and nine months ended September 30, 2018 includes a $3.8 million gain from the reversal of a previous valuation adjustment due to sales of TRUPs loans. The following table reflects a disaggregation of FHN’s noninterest income by major product line and reportable segment for the three and nine months ended September 30, 2018 and 2017 : Three Months Ended September 30, 2018 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 103 $ 40,937 $ (5 ) $ 3,778 $ 44,813 Deposit transactions and cash management 34,008 3 1,725 56 35,792 Brokerage, management fees and commissions 14,200 — — — 14,200 Trust services and investment management 7,453 — (15 ) — 7,438 Bankcard income 6,999 — 57 (178 ) 6,878 Bank-owned life insurance (b) — — 4,337 — 4,337 Debt securities gains/(losses), net (b) — — — — — Equity securities gains/(losses), net (b) (d) — — 212,859 — 212,859 All other income and commissions (c) 17,094 183 3,661 1,717 22,655 Total noninterest income $ 79,857 $ 41,123 $ 222,619 $ 5,373 $ 348,972 Three Months Ended September 30, 2017 Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income $ 135 $ 55,623 $ — $ — $ 55,758 Deposit transactions and cash management 26,620 — 1,339 52 28,011 Brokerage, management fees and commissions 11,937 — — — 11,937 Trust services and investment management 6,968 — (15 ) — 6,953 Bankcard income 6,057 — 56 57 6,170 Bank-owned life insurance — — 3,539 — 3,539 Debt securities gains/(losses), net — — 1 — 1 Equity securities gains/(losses), net — — 5 — 5 All other income and commissions (e) 12,653 180 (14,401 ) 1,611 43 Total noninterest income $ 64,370 $ 55,803 $ (9,476 ) $ 1,720 $ 112,417 (a) Includes $8.4 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." Non-Strategic includes a $3.8 million gain from the reversal of a previous valuation adjustment due to sales of TRUPs loans excluded from the scope of ASC 606. (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 other service charges, ATM and interchange fees, electronic banking fees, and insurance commission in scope of ASC 606. (d) In third quarter 2018, FHN sold its remaining holdings of Visa Class B shares resulting in a pre-tax gain of $212.9 million . (e) Corporate includes a $14.3 million pre-tax loss from the repurchase of equity securities previously included in a financing transaction. Nine Months Ended September 30, 2018 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income (a) $ 314 $ 123,929 $ (5 ) $ 3,778 $ 128,016 Deposit transactions and cash management 103,275 9 4,416 159 107,859 Brokerage, management fees and commissions 41,423 — — — 41,423 Trust services and investment management 22,891 — (44 ) — 22,847 Bankcard income 19,921 — 168 (131 ) 19,958 Bank-owned life insurance (b) — — 14,103 — 14,103 Debt securities gains/(losses), net (b) — — 52 — 52 Equity securities gains/(losses), net (b) (d) — — 212,924 — 212,924 All other income and commissions (c) (e) 52,269 1,153 9,051 2,859 65,332 Total noninterest income $ 240,093 $ 125,091 $ 240,665 $ 6,665 $ 612,514 Nine Months Ended September 30, 2017 Regional Banking Fixed Income Corporate Non-Strategic Consolidated Noninterest income: Fixed income $ 348 $ 161,198 $ — $ — $ 161,546 Deposit transactions and cash management 76,288 — 4,004 142 80,434 Brokerage, management fees and commissions 35,872 — — — 35,872 Trust services and investment management 21,360 — (56 ) — 21,304 Bankcard income 16,894 — 169 167 17,230 Bank-owned life insurance — — 11,137 — 11,137 Debt securities gains/(losses), net 386 — 64 — 450 Equity securities gains/(losses), net — — 5 — 5 All other income and commissions (f) 36,941 635 (13,104 ) 4,579 29,051 Total noninterest income $ 188,089 $ 161,833 $ 2,219 $ 4,888 $ 357,029 (a) Includes $24.0 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." Non-Strategic includes a $3.8 million gain from the reversal of a previous valuation adjustment due to sales of TRUPs loans excluded from the scope of ASC 606. (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 other service charges, ATM and interchange fees, electronic banking fees, and insurance commission in scope of ASC 606. (d) In third quarter 2018, FHN sold its remaining holdings of Visa Class B shares resulting in a pre-tax gain of $212.9 million . (e) Corporate includes $4.1 million of gains on the sales of buildings. (f) 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)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest Entities	The following table summarizes the impact to the Provision/(benefit) for income taxes on the Consolidated Condensed Statements of Income for the three and nine months ended September 30, 2018 , and 2017 for LIHTC investments accounted for under the proportional amortization method. Three Months Ended Nine Months Ended (Dollars in thousands) 2018 2017 2018 2017 Provision/(benefit) for income taxes: Amortization of qualifying LIHTC investments $ 1,547 $ 3,774 $ 6,094 $ 8,414 Low income housing tax credits (2,584 ) (3,103 ) (7,681 ) (8,101 ) Other tax benefits related to qualifying LIHTC investments (1,412 ) (2,478 ) (2,996 ) (4,307 ) The following table summarizes VIEs consolidated by FHN as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 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 17,106 N/A 24,175 N/A Less: Allowance for loan losses — N/A — N/A Total net loans 17,106 N/A 24,175 N/A Other assets 35 $ 84,170 47 $ 80,479 Total assets $ 17,141 $ 84,170 $ 24,222 $ 80,479 Liabilities: Term borrowings $ 4,071 N/A $ 11,226 N/A Other liabilities — $ 63,017 2 $ 61,733 Total liabilities $ 4,071 $ 63,017 $ 11,228 $ 61,733 The following table summarizes FHN’s nonconsolidated VIEs as of September 30, 2018 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type Low income housing partnerships $ 118,355 $ 52,148 (a) Other tax credit investments (b) (c) 17,878 — Other assets Small issuer trust preferred holdings (d) 276,825 — Loans, net of unearned income On-balance sheet trust preferred securitization 48,306 65,868 (e) Proprietary residential mortgage securitizations 1,592 — Trading securities Holdings of agency mortgage-backed securities (d) 5,209,810 — (f) Commercial loan troubled debt restructurings (g) 41,926 — Loans, net of unearned income Sale-leaseback transaction 16,327 — (h) Proprietary trust preferred issuances (i) — 202,068 Term borrowings (a) Maximum loss exposure represents $66.2 million of current investments and $52.1 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, $18.0 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 $65.9 million classified as Term borrowings. (f) Includes $.8 billion classified as Trading securities and $4.4 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $41.4 million of current receivables and $.6 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, 2017 : (Dollars in thousands) Maximum Loss Exposure Liability Recognized Classification Type Low income housing partnerships $ 94,798 $ 33,348 (a) Other tax credit investments (b) (c) 20,394 — Other assets Small issuer trust preferred holdings (d) 332,455 — Loans, net of unearned income On-balance sheet trust preferred securitization 48,817 65,357 (e) Proprietary residential mortgage securitizations 2,151 — Trading securities Holdings of agency mortgage-backed securities (d) 5,349,287 — (f) Commercial loan troubled debt restructurings (g) 19,411 — Loans, net of unearned income Sale-leaseback transaction 14,827 — (h) Proprietary trust preferred issuances (i) — 212,378 Term borrowings (a) Maximum loss exposure represents $61.5 million of current investments and $33.3 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, $18.0 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 $65.4 million classified as Term borrowings. (f) Includes $.5 billion classified as Trading securities and $4.8 billion classified as Securities available-for-sale. (g) Maximum loss exposure represents $19.1 million of current receivables and $ .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)	9 Months Ended
	Sep. 30, 2018
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 September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 2,200,080 $ 7,861 $ 55,392 Offsetting upstream interest rate contracts 2,200,080 7,904 8,244 Option contracts purchased 30,000 32 — Forwards and futures purchased 5,425,631 4,915 14,002 Forwards and futures sold 5,701,595 15,098 4,768 December 31, 2017 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 2,026,753 $ 22,097 $ 18,323 Offsetting upstream interest rate contracts 2,026,753 17,931 20,720 Option contracts purchased 20,000 15 — Forwards and futures purchased 6,257,140 4,354 5,526 Forwards and futures sold 6,292,012 5,806 4,010
Derivatives Associated With Interest Rate Risk Management Activities	The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 1,871,936 $ 3,792 $ 50,992 Offsetting upstream interest rate contracts 1,871,936 14,182 2,608 Debt Hedging Hedging Instruments: Interest rate swaps $ 900,000 $ 189 N/A Hedged Items: Term borrowings: Par N/A N/A $ 900,000 Cumulative fair value hedging adjustments N/A N/A (21,782 ) Unamortized premium/(discount) and issuance costs N/A N/A (2,699 ) Total carrying value N/A N/A 875,519 December 31, 2017 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 1,608,912 $ 11,644 $ 19,780 Offsetting upstream interest rate contracts 1,608,912 18,473 11,019 Debt Hedging Hedging Instruments: Interest rate swaps $ 900,000 $ 371 N/A Hedged Items: Term borrowings: Par N/A N/A $ 900,000 Cumulative fair value hedging adjustments N/A N/A (13,472 ) Unamortized premium/(discount) and issuance costs N/A N/A (3,910 ) Total carrying value N/A N/A $ 882,618
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 three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Gains/(Losses) Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts (a) $ (10,620 ) $ (180 ) $ (39,803 ) $ 643 Offsetting upstream interest rate contracts (a) 10,620 180 39,803 (643 ) Debt Hedging Hedging Instruments: Interest rate swaps (b) $ (246 ) $ (966 ) $ (8,386 ) $ (1,958 ) Hedged Items: Term borrowings (b) (c) 240 941 8,310 1,870 (a) Gains/losses included in All other expense within the Consolidated Condensed Statements of Income. (b) Gains/losses included in the Interest expense for 2018 and All other expense for 2017 within the Consolidated Condensed Statements 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 September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate swaps $ 900,000 $ 373 N/A Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 900,000 N/A December 31, 2017 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate swaps $ 900,000 $ 942 N/A 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 three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Dollars in thousands) Gains/(Losses) Gains/(Losses) Gains/(Losses) Gains/(Losses) Cash Flow Hedges Hedging Instruments: Interest rate swaps (a) $ (2,257 ) $ (1,190 ) $ (17,788 ) $ (800 ) Gain/(loss) recognized in Other comprehensive income/(loss) (2,517 ) (91 ) (14,612 ) 1,906 Gain/(loss) reclassified from AOCI into Interest income 771 (643 ) 1,079 (2,399 ) (a) Approximately $10.6 million of pre-tax losses 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 Condensed Statements of Condition as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 (b) $ 34,414 $ — $ 34,414 $ (8,590 ) $ (25,156 ) $ 668 December 31, 2017 (b) 71,458 — 71,458 (17,278 ) (51,271 ) 2,909 (a) Included in Derivative assets on the Consolidated Condensed Statements of Condition. As of September 30, 2018 and December 31, 2017 , $20.1 million and $10.2 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 Condensed Statements of Condition as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 (b) $ 117,241 $ — $ 117,241 $ (8,590 ) $ (65,354 ) $ 43,297 December 31, 2017 (b) 69,842 — 69,842 (17,278 ) (51,801 ) 763 (a) Included in Derivative liabilities on the Consolidated Condensed Statements of Condition. As of September 30, 2018 and December 31, 2017 , $53.1 million and $15.2 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)	9 Months Ended
	Sep. 30, 2018
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 Condensed Statements of Condition and collateral pledged by counterparties as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 $ 687,437 $ — $ 687,437 $ (1,017 ) $ (681,110 ) $ 5,310 December 31, 2017 725,609 — 725,609 (259 ) (720,036 ) 5,314
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 Condensed Statements of Condition and collateral pledged by FHN as of September 30, 2018 and December 31, 2017 : 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: September 30, 2018 $ 678,510 $ — $ 678,510 $ (1,017 ) $ (677,125 ) $ 368 December 31, 2017 656,602 — 656,602 (259 ) (656,216 ) 127
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 September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 17,555 $ — $ 17,555 Government agency issued MBS 314,231 5,529 319,760 Government agency issued CMO 49,553 2,413 51,966 Government guaranteed loans (SBA and USDA) 289,229 — 289,229 Total Securities sold under agreements to repurchase $ 670,568 $ 7,942 $ 678,510 December 31, 2017 (Dollars in thousands) Overnight and Continuous Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 13,830 $ — $ 13,830 Government agency issued MBS 424,821 5,365 430,186 Government agency issued CMO 54,037 3,666 57,703 Government guaranteed loans (SBA and USDA) 154,883 — 154,883 Total Securities sold under agreements to repurchase $ 647,571 $ 9,031 $ 656,602

Fair Value of Assets & Liabil_2

Fair Value of Assets & Liabilities (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 : September 30, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 121,490 $ — $ 121,490 Government agency issued MBS — 235,403 — 235,403 Government agency issued CMO — 568,344 — 568,344 Other U.S. government agencies — 43,642 — 43,642 States and municipalities — 54,669 — 54,669 Corporates and other debt — 866,128 — 866,128 Equity, mutual funds, and other — 39,723 — 39,723 Total trading securities—fixed income — 1,929,399 — 1,929,399 Trading securities—mortgage banking — — 1,592 1,592 Loans held-for-sale (elected fair value) — 182 16,236 16,418 Securities available-for-sale: U.S. treasuries — 98 — 98 Government agency issued MBS — 2,414,877 — 2,414,877 Government agency issued CMO — 1,991,184 — 1,991,184 Other U.S. government agencies — 113,088 — 113,088 States and municipalities — 23,701 — 23,701 Corporates and other debt — 55,074 — 55,074 Interest-only strips (elected fair value) — — 10,361 10,361 Total securities available-for-sale — 4,598,022 10,361 4,608,383 Other assets: Deferred compensation mutual funds 40,912 — — 40,912 Equity, mutual funds, and other 22,141 — — 22,141 Derivatives, forwards and futures 20,013 — — 20,013 Derivatives, interest rate contracts — 34,333 — 34,333 Derivatives, other — 130 — 130 Total other assets 83,066 34,463 — 117,529 Total assets $ 83,066 $ 6,562,066 $ 28,189 $ 6,673,321 Trading liabilities—fixed income: U.S. treasuries $ — $ 574,897 $ — $ 574,897 States and municipalities — 110 — 110 Corporates and other debt — 164,687 — 164,687 Total trading liabilities—fixed income — 739,694 — 739,694 Other liabilities: Derivatives, forwards and futures 18,770 — — 18,770 Derivatives, interest rate contracts — 117,236 — 117,236 Derivatives, other — 106 34,212 34,318 Total other liabilities 18,770 117,342 34,212 170,324 Total liabilities $ 18,770 $ 857,036 $ 34,212 $ 910,018 The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 : December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 128,995 $ — $ 128,995 Government agency issued MBS — 227,038 — 227,038 Government agency issued CMO — 275,014 — 275,014 Other U.S. government agencies — 54,699 — 54,699 States and municipalities — 34,573 — 34,573 Corporates and other debt — 693,877 — 693,877 Equity, mutual funds, and other — (2 ) — (2 ) Total trading securities—fixed income — 1,414,194 — 1,414,194 Trading securities—mortgage banking — — 2,151 2,151 Loans held-for-sale — 1,955 18,926 20,881 Securities available-for-sale: U.S. treasuries — 99 — 99 Government agency issued MBS — 2,577,376 — 2,577,376 Government agency issued CMO — 2,269,858 — 2,269,858 Corporates and other debt — 55,782 — 55,782 Interest-only strips — — 1,270 1,270 Equity, mutual funds, and other 27,017 — — 27,017 Total securities available-for-sale 27,017 4,903,115 1,270 4,931,402 Other assets: Deferred compensation assets 39,822 — — 39,822 Derivatives, forwards and futures 10,161 — — 10,161 Derivatives, interest rate contracts — 71,473 — 71,473 Total other assets 49,983 71,473 — 121,456 Total assets $ 77,000 $ 6,390,737 $ 22,347 $ 6,490,084 Trading liabilities—fixed income: U.S. treasuries $ — $ 506,679 $ — $ 506,679 Corporates and other debt — 131,836 — 131,836 Total trading liabilities—fixed income — 638,515 — 638,515 Other liabilities: Derivatives, forwards and futures 9,535 — — 9,535 Derivatives, interest rate contracts — 69,842 — 69,842 Derivatives, other — 39 5,645 5,684 Total other liabilities 9,535 69,881 5,645 85,061 Total liabilities $ 9,535 $ 708,396 $ 5,645 $ 723,576
Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value	The changes in Level 3 assets and liabilities measured at fair value for the three months ended September 30, 2018 and 2017 , on a recurring basis are summarized as follows: Three Months Ended September 30, 2018 (Dollars in thousands) Trading securities Interest- only strips- AFS Loans held- for-sale Net derivative liabilities Balance on July 1, 2018 $ 1,724 $ 5,787 $ 16,718 $ (9,425 ) Total net gains/(losses) included in: Net income 33 (456 ) 277 (529 ) Purchases — — — (28,100 ) (e) Sales — (2,034 ) — — Settlements (165 ) — (759 ) 3,842 Net transfers into/(out of) Level 3 — 7,064 (b) — (d) — Balance on September 30, 2018 $ 1,592 $ 10,361 $ 16,236 $ (34,212 ) Net unrealized gains/(losses) included in net income $ (3 ) (a) $ (215 ) (c) $ 277 (a) $ (530 ) (f) Three Months Ended September 30, 2017 (Dollars in thousands) Trading securities Interest-only strips-AFS Loans held-for-sale Net derivative liabilities Balance on July 1, 2017 $ 2,464 $ 1,163 $ 20,587 $ (5,700 ) Total net gains/(losses) included in: Net income 92 (160 ) 390 (129 ) Purchases — — 43 — Settlements (251 ) — (939 ) 299 Net transfers into/(out of) Level 3 — 2,120 (b) — (d) — Balance on September 30, 2017 $ 2,305 $ 3,123 $ 20,081 $ (5,530 ) Net unrealized gains/(losses) included in net income $ 62 (a) $ (72 ) (c) $ 390 (a) $ (129 ) (f) (a) Primarily included in mortgage banking income on the Consolidated Condensed 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 Condensed 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) Increase related to newly executed Visa-related derivatives, see Note 14- Derivatives for additional discussion. (f) Included in Other expense. Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the nine months ended September 30, 2018 and 2017 , on a recurring basis are summarized as follows: Nine Months Ended September 30, 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 173 840 986 (4,904 ) Purchases — — 62 (28,100 ) (e) Sales — (11,227 ) — — Settlements (732 ) — (3,382 ) 4,437 Net transfers into/(out of) Level 3 — 19,478 (b) (356 ) (d) — Balance on September 30, 2018 $ 1,592 $ 10,361 $ 16,236 $ (34,212 ) Net unrealized gains/(losses) included in net income $ 59 (a) $ (279 ) (c) $ 986 (a) $ (4,904 ) (f) Nine Months Ended September 30, 2017 (Dollars in thousands) Trading Interest-only-strips- AFS Loans held- Net derivative Balance on January 1, 2017 $ 2,573 $ — $ 21,924 $ (6,245 ) Total net gains/(losses) included in: Net income 380 107 1,722 (179 ) Purchases — 1,413 118 — Sales — (3,291 ) — — Settlements (648 ) — (3,340 ) 894 Net transfers into/(out of) Level 3 — 4,894 (b) (343 ) (d) — Balance on September 30, 2017 $ 2,305 $ 3,123 $ 20,081 $ (5,530 ) Net unrealized gains/(losses) included in net income $ 264 (a) $ (122 ) (c) $ 1,722 (a) $ (179 ) (f) (a) Primarily included in mortgage banking income on the Consolidated Condensed 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 Condensed 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) Increase related to newly executed Visa-related derivatives, see Note 14- Derivatives for additional discussion. (f) Included in Other expense.
Nonrecurring Fair Value Measurements	For assets measured at fair value on a nonrecurring basis which were still held on the balance sheet at September 30, 2018 , and December 31, 2017 , respectively, the following tables provide the level of valuation assumptions used to determine each adjustment and the related carrying value. Carrying value at September 30, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held-for-sale—SBAs and USDA $ — $ 618,142 $ 1,018 $ 619,160 Loans held-for-sale—first mortgages — — 542 542 Loans, net of unearned income (a) — — 26,995 26,995 OREO (b) — — 25,726 25,726 Other assets (c) — — 23,329 23,329 Carrying value at December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held-for-sale—SBAs and USDA $ — $ 465,504 $ 1,473 $ 466,977 Loans held-for-sale—first mortgages — — 618 618 Loans, net of unearned income (a) — — 26,666 26,666 OREO (b) — — 39,566 39,566 Other assets (c) — — 26,521 26,521 (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. (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.
Gains/(losses) on Nonrecurring Fair Value Measurements	For assets measured on a nonrecurring basis which were still held on the consolidated balance sheet at period end, the following table provides information about the fair value adjustments recorded during the three and nine months ended September 30, 2018 and 2017 : Net gains/(losses) Net gains/(losses) (Dollars in thousands) 2018 2017 2018 2017 Loans held-for-sale—SBAs and USDA $ (1,213 ) $ (86 ) $ (2,464 ) $ (1,259 ) Loans held-for-sale—first mortgages 3 6 7 22 Loans, net of unearned income (a) 363 (2,388 ) 1,020 (1,456 ) OREO (b) (776 ) (41 ) (2,198 ) (662 ) Other assets (c) (1,370 ) (762 ) (3,586 ) (2,646 ) $ (2,993 ) $ (3,271 ) $ (7,221 ) $ (6,001 ) (a) Write-downs on these loans are recognized as part of provision for loan losses. (b) Represents 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 September 30, 2018 and December 31, 2017 : (Dollars in thousands) Level 3 Class Fair Value at Valuation Techniques Unobservable Input Values Utilized Available-for-sale- securities SBA-interest only strips $ 10,361 Discounted cash flow Constant prepayment rate 11% Bond equivalent yield 13%- 18% Loans held-for-sale - residential real estate 16,778 Discounted cash flow Prepayment speeds - First mortgage 2% - 11% Prepayment speeds - HELOC 5% - 12% Foreclosure losses 50% - 70% Loss severity trends - First mortgage 2% - 25% of UPB Loss severity trends - HELOC 50% - 100% of UPB Loans held-for-sale- unguaranteed interest in SBA loans 1,018 Discounted cash flow Constant prepayment rate 8% - 12% Bond equivalent yield 9% Derivative liabilities, other 34,212 Discounted cash flow Visa covered litigation resolution amount $5.2 billion - $5.8 billion Probability of resolution scenarios 20% - 30% Time until resolution 24- 48 months Loans, net of unearned income (a) 26,995 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value Financial Statements/Auction values adjustment 0% - 25% of reported value OREO (b) 25,726 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal Other assets (c) 23,329 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal (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. (Dollars in thousands) Level 3 Class Fair Value at Valuation Techniques Unobservable Input Values Utilized Available-for-sale- securities SBA-interest only strips $ 1,270 Discounted cash flow Constant prepayment rate 10% - 11% Bond equivalent yield 17% Loans held-for-sale - residential real estate 19,544 Discounted cash flow Prepayment speeds - First mortgage 2% - 12% Prepayment speeds - HELOC 5% - 12% Foreclosure losses 50% - 70% Loss severity trends - First mortgage 5% - 30% of UPB Loss severity trends - HELOC 15% - 100% of UPB Loans held-for-sale- unguaranteed interest in SBA loans 1,473 Discounted cash flow Constant prepayment rate 8% - 12% Bond equivalent yield 9% - 10% Derivative liabilities, other 5,645 Discounted cash flow Visa covered litigation resolution amount $4.4 billion - $5.2 billion Probability of resolution scenarios 10% - 30% Time until resolution 18 - 48 months Loans, net of unearned income (a) 26,666 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value Financial Statements/Auction values adjustment 0% - 25% of reported value OREO (b) 39,566 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal Other assets (c) 26,521 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal (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.
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. September 30, 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 $ 16,418 $ 23,897 $ (7,479 ) Nonaccrual loans 4,483 8,360 (3,877 ) Loans 90 days or more past due and still accruing — — — December 31, 2017 (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 $ 20,881 $ 29,755 $ (8,874 ) Nonaccrual loans 5,783 10,881 (5,098 ) Loans 90 days or more past due and still accruing — — —
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: Three Months Ended Nine months ended (Dollars in thousands) 2018 2017 2018 2017 Changes in fair value included in net income: Mortgage banking noninterest income Loans held-for-sale $ 277 $ 390 $ 986 $ 1,722
Summary Of Book Value And Estimated Fair Value Of Financial Instruments	The following table summarizes the book value and estimated fair value of financial instruments recorded in the Consolidated Condensed Statements of Condition as of September 30, 2018 : September 30, 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 $ 15,943,831 $ — $ — $ 15,941,049 $ 15,941,049 Commercial real estate 4,203,121 — — 4,198,110 4,198,110 Consumer: Consumer real estate 6,164,646 — — 6,114,607 6,114,607 Permanent mortgage 333,574 — — 338,736 338,736 Credit card & other 519,083 — — 520,074 520,074 Total loans, net of unearned income and allowance for loan losses 27,164,255 — — 27,112,576 27,112,576 Short-term financial assets: Interest-bearing cash 531,681 531,681 — — 531,681 Federal funds sold 113,722 — 113,722 — 113,722 Securities purchased under agreements to resell 687,437 — 687,437 — 687,437 Total short-term financial assets 1,332,840 531,681 801,159 — 1,332,840 Trading securities (a) 1,930,991 — 1,929,399 1,592 1,930,991 Loans held-for-sale Mortgage loans (elected fair value) (a) 16,418 — 182 16,236 16,418 USDA & SBA loans- LOCOM 619,160 — 623,863 1,023 624,886 Other consumer loans- LOCOM 28,843 — 6,704 22,139 28,843 Mortgage loans- LOCOM 61,230 — — 61,230 61,230 Total loans held-for-sale 725,651 — 630,749 100,628 731,377 Securities available-for-sale (a) 4,608,383 — 4,598,022 10,361 4,608,383 Securities held-to-maturity 10,000 — — 9,756 9,756 Derivative assets (a) 54,476 20,013 34,463 — 54,476 Other assets: Tax credit investments 139,983 — — 136,984 136,984 Deferred compensation mutual funds 40,912 40,912 — — 40,912 Equity, mutual funds, and other (b) 240,667 22,141 — 218,526 240,667 Total other assets 421,562 63,053 — 355,510 418,563 Total assets $ 36,248,158 $ 614,747 $ 7,993,792 $ 27,590,423 $ 36,198,962 Liabilities: Defined maturity deposits $ 4,056,184 $ — $ 4,024,544 $ — $ 4,024,544 Trading liabilities (a) 739,694 — 739,694 — 739,694 Short-term financial liabilities: Federal funds purchased 437,474 — 437,474 — 437,474 Securities sold under agreements to repurchase 678,510 — 678,510 — 678,510 Other short-term borrowings 1,069,912 — 1,069,912 — 1,069,912 Total short-term financial liabilities 2,185,896 — 2,185,896 — 2,185,896 Term borrowings: Real estate investment trust-preferred 46,151 — — 47,470 47,470 Term borrowings—new market tax credit investment 18,000 — — 17,915 17,915 Secured borrowings 16,621 — — 16,499 16,499 Junior subordinated debentures 177,974 — — 177,974 177,974 Other long term borrowings 941,388 — 957,647 — 957,647 Total term borrowings 1,200,134 — 957,647 259,858 1,217,505 Derivative liabilities (a) 170,324 18,770 117,342 34,212 170,324 Total liabilities $ 8,352,232 $ 18,770 $ 8,025,123 $ 294,070 $ 8,337,963 (a) Classes are detailed in the recurring and nonrecurring measurement tables. (b) Level 1 primarily consists of mutual funds with readily determinable fair values. Level 3 includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $130.7 million . The following table summarizes the book value and estimated fair value of financial instruments recorded in the Consolidated Statements of Condition as of December 31, 2017 : December 31, 2017 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 $ 15,959,062 $ — $ — $ 15,990,991 $ 15,990,991 Commercial real estate 4,186,268 — — 4,215,367 4,215,367 Consumer: Consumer real estate 6,330,384 — — 6,320,308 6,320,308 Permanent mortgage 383,742 — — 388,396 388,396 Credit card & other 609,918 — — 607,955 607,955 Total loans, net of unearned income and allowance for loan losses 27,469,374 — — 27,523,017 27,523,017 Short-term financial assets: Interest-bearing cash 1,185,600 1,185,600 — — 1,185,600 Federal funds sold 87,364 — 87,364 — 87,364 Securities purchased under agreements to resell 725,609 — 725,609 — 725,609 Total short-term financial assets 1,998,573 1,185,600 812,973 — 1,998,573 Trading securities (a) 1,416,345 — 1,414,194 2,151 1,416,345 Loans held-for-sale Mortgage loans 88,173 — 6,902 81,271 88,173 USDA & SBA loans 466,977 — 467,227 1,510 468,737 Other consumer loans 144,227 — 9,965 134,262 144,227 Securities available-for-sale (a) (b) 5,170,255 27,017 4,903,115 240,123 5,170,255 Securities held-to-maturity 10,000 — — 9,901 9,901 Derivative assets (a) 81,634 10,161 71,473 — 81,634 Other assets: Tax credit investments 119,317 — — 112,292 112,292 Deferred compensation assets 39,822 39,822 — — 39,822 Total other assets 159,139 39,822 — 112,292 152,114 Nonearning assets: Cash & due from banks 639,073 639,073 — — 639,073 Fixed income receivables 68,693 — 68,693 — 68,693 Accrued interest receivable 97,239 — 97,239 — 97,239 Total nonearning assets 805,005 639,073 165,932 — 805,005 Total assets $ 37,809,702 $ 1,901,673 $ 7,851,781 $ 28,104,527 $ 37,857,981 Liabilities: Deposits: Defined maturity $ 3,322,921 $ — $ 3,293,650 $ — $ 3,293,650 Undefined maturity 27,297,441 — 27,297,431 — 27,297,431 Total deposits 30,620,362 — 30,591,081 — 30,591,081 Trading liabilities (a) 638,515 — 638,515 — 638,515 Short-term financial liabilities: Federal funds purchased 399,820 — 399,820 — 399,820 Securities sold under agreements to repurchase 656,602 — 656,602 — 656,602 Other short-term borrowings 2,626,213 — 2,626,213 — 2,626,213 Total short-term financial liabilities 3,682,635 — 3,682,635 — 3,682,635 Term borrowings: Real estate investment trust-preferred 46,100 — — 48,880 48,880 Term borrowings—new market tax credit investment 18,000 — — 17,930 17,930 Secured borrowings 18,642 — — 18,305 18,305 Junior subordinated debentures 187,281 — — 187,281 187,281 Other long term borrowings 948,074 — 966,292 — 966,292 Total term borrowings 1,218,097 — 966,292 272,396 1,238,688 Derivative liabilities (a) 85,061 9,535 69,881 5,645 85,061 Other noninterest-bearing liabilities: Fixed income payables 48,996 — 48,996 — 48,996 Accrued interest payable 16,270 — 16,270 — 16,270 Total other noninterest-bearing liabilities 65,266 — 65,266 — 65,266 Total liabilities $ 36,309,936 $ 9,535 $ 36,013,670 $ 278,041 $ 36,301,246 (a) Classes are detailed in the recurring and nonrecurring measurement tables. (b) Level 3 includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $134.6 million . The following table presents the contractual amount and fair value of unfunded loan commitments and standby and other commitments as of September 30, 2018 and December 31, 2017 : Contractual Amount Fair Value (Dollars in thousands) September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Unfunded Commitments: Loan commitments $ 10,829,303 $ 10,678,485 $ 2,871 $ 2,617 Standby and other commitments 450,745 420,728 4,981 5,274

Financial Information - Narrati

Financial Information - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Product Information [Line Items]
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12			$ 67	$ 0
Revenue, performance obligation, description of timing	one year or less
Available-for-sale Securities | Accounting Standards Update 2016-01
Product Information [Line Items]
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12		$ (265,900)
Other Assets | Accounting Standards Update 2016-01
Product Information [Line Items]
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12		$ 265,900
Non-Interest income
Product Information [Line Items]
Accounts receivable	$ 9,000
Pro Forma | Accounting Standards Update 2016-02
Product Information [Line Items]
Lease assets	185,000
Lease liabilities	195,000
Pro Forma | Retained Earnings | Accounting Standards Update 2016-02
Product Information [Line Items]
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12	$ 3,000

Financial Information - ASU 201

Financial Information - ASU 2016-15 (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from BOLI		$ (11,559)	$ (5,850)
Accounting Standards Update 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from BOLI	$ 160		$ 5,850	$ 11,440	$ 2,740	$ 2,425

Financial Information - ASU 2_2

Financial Information - ASU 2017-07 (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee Compensation, Incentives, and Benefits Expense | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net periodic benefit cost reclassified	$ 415	$ 1,665	$ 1,946	$ (843)	$ (1,168)

Acquisitions and Divestitures -

Acquisitions and Divestitures - Narrative (Details) $ in Thousands	Mar. 23, 2018USD ($)branch	Nov. 30, 2017USD ($)branchshares	Apr. 03, 2017USD ($)	Jun. 30, 2018USD ($)shares	Sep. 30, 2018USD ($)branch	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Goodwill					$ 1,409,822	$ 1,386,853	$ 236,335	$ 191,371
Number of branches divested | branch					2
Deposits disposed of						$ 22,600
Portion of Sub-prime Auto Loan Portfolios
Business Acquisition [Line Items]
Loans disposed of				$ 120,000	$ 120,000
Apex Bank
Business Acquisition [Line Items]
Number of branches divested | branch	2
Deposits disposed of	$ 30,000
Loans disposed of	$ 2,000
Capital Bank Financial Corporation
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares (in shares) | shares		92,042,232
Payments to acquire businesses		$ 423,600		$ 46,000	469,609
Business combination, consideration transferred		$ 2,200,000			2,216,333
Business acquisition, number of shares canceled (in shares) | shares				2,373,220
Number of bank branches | branch		178
Assets acquired		$ 9,900,000			9,857,979
Loans		7,300,000			7,276,544
Securities available-for-sale		1,200,000			1,193,393
Deposits		$ 8,100,000			8,140,102
Goodwill					1,169,874
Loans held-for-sale					124,918
Trading securities					0
Securities sold under agreements to repurchase					$ 26,664
Coastal Securities, Inc
Business Acquisition [Line Items]
Payments to acquire businesses			$ 131,000
Assets acquired			418,000
Goodwill			45,000
Loans held-for-sale			236,000
Trading securities			139,000
Securities sold under agreements to repurchase			202,000
Fixed income payables			$ 96,000

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Purchase Price Allocation (Details) - USD ($) $ in Thousands		Nov. 30, 2017	Jun. 30, 2018	Sep. 30, 2018		Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Assets:
Cash and cash equivalents				$ 642,051		$ 639,073
Trading securities				1,930,991		1,416,345
Loans held-for-sale	[1]			725,651		699,377
Securities held-to-maturity				10,000		10,000
Loans				27,350,214	[2]	27,658,929	[2]	$ 20,166,091
Allowance for loan losses			$ (185,462)	(185,959)		(189,555)		(194,867)	$ (197,257)	$ (202,068)
CBF Goodwill				1,409,822		1,386,853		236,335		191,371
Other intangible assets				161,495		184,389
Premises and equipment				506,453		532,251
OREO	[3]			28,628		43,382
Other assets				1,883,077		1,723,189
Total assets				40,635,924		41,423,388
Liabilities:
Deposits				31,008,085		30,620,362
Securities sold under agreements to repurchase				678,510		656,602
Other short-term borrowings				1,069,912		2,626,213
Term borrowings				1,200,134		1,218,097
Other liabilities				552,921		549,234
Total liabilities				35,893,993		36,842,900
Consideration paid:
Goodwill				1,409,822		1,386,853		$ 236,335		$ 191,371
Capital Bank Financial Corporation
Assets:
CBF Goodwill				1,169,874
Assets As Recorded:
Cash and cash equivalents				205,999
Trading securities				0
Loans held-for-sale				124,918
Securities available-for-sale		$ 1,200,000		1,193,393
Securities held-to-maturity				0
Loans		7,300,000		7,276,544
Allowance for loan losses				0
Other intangible assets				141,207
Premises and equipment				231,001
OREO				33,613
Other assets				651,304
Total assets acquired		9,900,000		9,857,979
Liabilities As Recorded:
Deposits		8,100,000		8,140,102
Securities sold under agreements to repurchase				26,664
Other short-term borrowings				390,391
Term borrowings				187,169
Other liabilities				67,194
Total liabilities assumed				8,811,520
Net assets acquired				1,046,459
Consideration paid:
Equity				(1,746,724)
Cash		(423,600)	$ (46,000)	(469,609)
Total consideration paid		(2,200,000)		(2,216,333)
Goodwill				1,169,874
Capital Bank Financial Corporation | Purchase Accounting/Fair Value Adjustments
Assets:
Cash and cash equivalents				0		0
Trading securities				0		(4,758)
Loans held-for-sale				(9,085)		134,003
Securities available-for-sale				0		175,526
Securities held-to-maturity				0		(177,549)
Loans				867		(320,372)
Allowance for loan losses				0		45,711
CBF Goodwill				0		(231,292)
Other intangible assets				(2,593)		119,302
Premises and equipment				(2,351)		37,054
OREO				(315)		(9,149)
Other assets				(7,248)		41,320
Total assets				(20,725)		(190,204)
Liabilities:
Deposits				(642)		(849)
Securities sold under agreements to repurchase				0		0
Other short-term borrowings				0		0
Term borrowings				0		67,683
Other liabilities				2,908		4,291
Total liabilities				2,266		71,125
Net assets acquired				(22,991)		(261,329)
Consideration paid:
Goodwill				$ 0		$ (231,292)
Capital Bank Financial Corporation
Assets:
Cash and cash equivalents		205,999
Trading securities		4,758
Loans held-for-sale		0
Securities available-for-sale		1,017,867
Securities held-to-maturity		177,549
Loans		7,596,049
Allowance for loan losses		(45,711)
CBF Goodwill		231,292
Other intangible assets		24,498
Premises and equipment		196,298
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		119,486
Other liabilities		59,995
Total liabilities		8,738,129
Net assets acquired		1,330,779
Consideration paid:
Goodwill		$ 231,292
[1]	September 30, 2018 and December 31, 2017 include $9.2 million and $11.7 million, respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.
[2]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.
[3]	September 30, 2018 and December 31, 2017 include $11.0 million and $12.2 million, respectively, of foreclosed residential real estate.

Acquisitions and Divestitures_3

Acquisitions and Divestitures - Merger and Integration Expenses (Details) - Capital Bank Financial Corporation - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Merger and integration expense	$ 10,190	$ 6,991	$ 82,052	$ 11,622
Professional fees
Business Acquisition [Line Items]
Merger and integration expense	4,594	3,492	19,215	8,004
Employee compensation, incentives and benefits
Business Acquisition [Line Items]
Merger and integration expense	1,965	232	8,459	232
Contract employment and outsourcing
Business Acquisition [Line Items]
Merger and integration expense	599	351	3,702	351
Occupancy
Business Acquisition [Line Items]
Merger and integration expense	100	15	2,321	15
Miscellaneous expense
Business Acquisition [Line Items]
Merger and integration expense	1,384	130	6,522	234
All other expense
Business Acquisition [Line Items]
Merger and integration expense	$ 1,548	$ 2,771	$ 41,833	$ 2,786

Investment Securities - Schedul

Investment Securities - Schedule Of FHN's Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 4,775,226
Fair Value	4,608,383	$ 5,170,255
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,000	10,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(244)	(99)
Fair Value	9,756	9,901
Securities pledged and sold	3,600,000	4,000,000
FHLB-Cincinnati
Debt Securities, Available-for-sale [Line Items]
Restricted investments		87,900
FRB
Debt Securities, Available-for-sale [Line Items]
Restricted investments		134,600
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	100	100
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2)	(1)
Fair Value	98	99
Government agency issued mortgage-backed securities (“MBS”)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,504,101	2,580,442
Gross Unrealized Gains	2,987	10,538
Gross Unrealized Losses	(92,211)	(13,604)
Fair Value	2,414,877	2,577,376
Government agency issued collateralized mortgage obligations (“CMO”)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,077,326	2,302,439
Gross Unrealized Gains	216	1,691
Gross Unrealized Losses	(86,358)	(34,272)
Fair Value	1,991,184	2,269,858
Other U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	114,053	265,863
Gross Unrealized Gains	0	7
Gross Unrealized Losses	(965)	0
Fair Value	113,088	265,870
Corporates and other debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	55,495	55,799
Gross Unrealized Gains	270	23
Gross Unrealized Losses	(691)	(40)
Fair Value	55,074	55,782
States and municipalities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,151
Gross Unrealized Gains	0
Gross Unrealized Losses	(450)
Fair Value	23,701
Securities available-for-sale
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,775,226	5,204,643
Gross Unrealized Gains	3,473	12,259
Gross Unrealized Losses	(180,677)	(47,917)
Fair Value	4,598,022	5,168,985
SBA-interest only strips
Debt Securities, Available-for-sale [Line Items]
Fair Value	10,361	1,270
Corporates and other debt
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,000	10,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(244)	(99)
Fair Value	$ 9,756	$ 9,901

Investment Securities - Sched_2

Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized Cost
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
Fair Value
Within 1 year	0
After 1 year; within 5 years	0
After 5 years; within 10 years	9,756
After 10 years	0
Subtotal	9,756
Government agency issued MBS and CMO	0
Total	9,756	9,901
Amortized Cost
Within 1 year	15,188
After 1 year; within 5 years	154,460
After 5 years; within 10 years	0
After 10 years	24,151
Subtotal	193,799
Government agency issued MBS and CMO	4,581,427
Amortized Cost	4,775,226
Fair Value
Within 1 year	15,025
After 1 year; within 5 years	153,261
After 5 years; within 10 years	3,741
After 10 years	30,295
Subtotal	202,322
Government agency issued MBS and CMO	4,406,061
Total	$ 4,608,383	$ 5,170,255

Investment Securities - Sched_3

Investment Securities - Schedule Of Realized Gross Gains And Losses On Sale From Available For Sale Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Gross gains on sales of securities	$ 0	$ 6
Gross gains on sales of securities			$ 52	$ 455
Gross (losses) on sales of securities	0	0
Gross (losses) on sales of securities			0	0
Net gain/(loss) on sales of securities	$ 0	$ 6
Net gain/(loss) on sales of securities			$ 52	455
Gain associated with call of held-to-maturity securities				400
Held-to-maturity security called				$ 4,400

Investment Securities - Sched_4

Investment Securities - Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	$ 2,677,574	$ 2,514,856
Less than 12 months, Unrealized Losses	(83,377)	(12,243)
12 months or longer, Fair Value	1,696,331	1,164,073
12 months or longer, Unrealized Losses	(97,300)	(35,674)
Total Fair Value	4,373,905	3,678,929
Total Unrealized Losses	(180,677)	(47,917)
U.S. treasuries
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	0	99
Less than 12 months, Unrealized Losses	0	(1)
12 months or longer, Fair Value	98	0
12 months or longer, Unrealized Losses	(2)	0
Total Fair Value	98	99
Total Unrealized Losses	(2)	(1)
Government agency issued MBS
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	1,500,317	1,455,476
Less than 12 months, Unrealized Losses	(52,607)	(4,738)
12 months or longer, Fair Value	732,470	331,900
12 months or longer, Unrealized Losses	(39,604)	(8,866)
Total Fair Value	2,232,787	1,787,376
Total Unrealized Losses	(92,211)	(13,604)
Government agency issued CMO
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	1,000,444	1,043,987
Less than 12 months, Unrealized Losses	(28,664)	(7,464)
12 months or longer, Fair Value	963,763	832,173
12 months or longer, Unrealized Losses	(57,694)	(26,808)
Total Fair Value	1,964,207	1,876,160
Total Unrealized Losses	(86,358)	(34,272)
Other U.S. government agencies
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	113,088
Less than 12 months, Unrealized Losses	(965)
12 months or longer, Fair Value	0
12 months or longer, Unrealized Losses	0
Total Fair Value	113,088
Total Unrealized Losses	(965)
Corporates and other debt
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	40,024
Less than 12 months, Unrealized Losses	(691)
12 months or longer, Fair Value	0
12 months or longer, Unrealized Losses	0
Total Fair Value	40,024
Total Unrealized Losses	(691)
States and municipalities
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	23,701
Less than 12 months, Unrealized Losses	(450)
12 months or longer, Fair Value	0
12 months or longer, Unrealized Losses	0
Total Fair Value	23,701
Total Unrealized Losses	$ (450)
Corporates and other debt
Schedule of Investments [Line Items]
Less than 12 months, Fair Value		15,294
Less than 12 months, Unrealized Losses		(40)
12 months or longer, Fair Value		0
12 months or longer, Unrealized Losses		0
Total Fair Value		15,294
Total Unrealized Losses		$ (40)

Investment Securities - Narrati

Investment Securities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Carrying amount of equity investments without a readily determinable fair value	$ 21.6	$ 21.6	$ 16.3
Unrealized gain for equity investments with readily determinable fair values	1	2.1
Visa Class B Shares
Gain (Loss) on Securities [Line Items]
Gain on sale of investments	$ 212.9	$ 212.9

Loans - Schedule Of Loans By Po

Loans - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2018		Jun. 30, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 27,350,214	[1]		$ 27,658,929	[1]	$ 20,166,091
Allowance for loan losses	185,959		$ 185,462	189,555		194,867	$ 197,257	$ 202,068
Total net loans	27,164,255			27,469,374
Commercial, financial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	16,044,145					12,791,844
Allowance for loan losses	100,314		96,834	98,211		98,205	92,379	89,398
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,237,036					2,251,015
Allowance for loan losses	33,915		33,832	28,427		29,683	30,470	33,852
Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,191,183					4,369,717
Allowance for loan losses	26,537		31,769	37,371		40,939	46,069	50,357
Permanent mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	347,054					403,082
Allowance for loan losses	13,480		14,078	15,565		15,719	16,398	16,289
Credit card & other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	530,796					350,433
Allowance for loan losses	11,713		$ 8,949	9,981		$ 10,321	$ 11,941	$ 12,172
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	16,044,145			16,057,273
Allowance for loan losses	134,229			126,638
Commercial Portfolio Segment | Commercial, financial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	16,044,145			16,057,273
Commercial Portfolio Segment | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,237,036			4,214,695
Consumer Portfolio Segment | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,191,183			6,367,755
Consumer Portfolio Segment | Permanent mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	347,054			399,307
Consumer Portfolio Segment | Credit card & other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	530,796			619,899
Consumer Portfolio Segment | Restricted real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 17,100			$ 24,200
[1]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

Loans - Narrative (Details)

Loans - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance - purchased credit-impaired loans	$ 3,398,000	$ 3,135,000	$ 3,398,000	$ 3,135,000	$ 3,200,000
Provision expense (credit) for loan and lease losses	900,000	$ 2,600,000	3,500,000	$ 2,400,000
Financing receivable, modifications, recorded investment	$ 236,500,000		$ 236,500,000		234,400,000
Commercial Loan P D Grade One
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lowest expected default probability	1		1
Pass | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1		1
Pass | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	12		12
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13		13
Special Mention | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13		13
Unlikely to be Collected Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16		16
Unlikely to be Collected Financing Receivable | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16		16
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	14		14
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	15		15
Loan Reassessed | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 1,000,000		$ 1,000,000
Commercial Loan P D Grade Thirteen | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 500,000		$ 500,000
Commercial Loan L G D Grade One | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1		1
Commercial Loan L G D Grade Twelve | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	12		12
Allowance For TDRs To Recorded Investment Of TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Valuation allowance	$ 28,400,000		$ 28,400,000		$ 37,300,000
Ratio of the allowance for loan losses to loans	12.00%		12.00%		16.00%
Loans Held-For-Sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment	$ 57,900,000		$ 57,900,000		$ 63,200,000
Consumer Portfolio Segment | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage			24.00%
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	20,281,181,000		$ 20,281,181,000		20,271,968,000
Allowance - purchased credit-impaired loans	1,926,000		$ 1,926,000		2,813,000
Commercial Portfolio Segment | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forbearance agreements time period			6 months
Commercial Portfolio Segment | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forbearance agreements time period			12 months
Commercial Portfolio Segment | Finance And Insurance Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 2,700,000,000		$ 2,700,000,000
Percentage of commercial & industrial loan portfolio	17.00%		17.00%
Percentage contributed in total loan	10.00%		10.00%
Commercial Portfolio Segment | Loans to Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 2,092,366,000		$ 2,092,366,000		$ 2,099,961,000
Percentage of commercial & industrial loan portfolio	13.00%		13.00%
Percentage contributed in total loan	8.00%		8.00%
Commercial Portfolio Segment | Finance Insurance And Loans To Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of commercial & industrial loan portfolio	30.00%		30.00%
Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage			23.00%
TDRS maturities			30 years
Consumer real estate | Heloc And Real Estate Installment Classes
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR, reduction of interest rate by increment, basis points	0.25%		0.25%
Modified interest rate increase	2.00%		2.00%
Consumer real estate | Heloc And Real Estate Installment Classes | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate	1.00%		1.00%
Modified interest rate time period			5 years
Consumer real estate | Heloc And Real Estate Installment Classes | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate time period			5 years
Credit Card And Other Portfolio Segment | Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit card workout program, granted rate reduction	0.00%		0.00%
Credit Card And Other Portfolio Segment | Credit card | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payment reductions, time period			6 months
Credit Card And Other Portfolio Segment | Credit card | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payment reductions, time period			1 year
Credit card workout program, term extension			5 years
Permanent mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR, reduction of interest rate by increment, basis points	0.25%		0.25%
Modified interest rate increase	1.00%		1.00%
TDRS maturities			40 years
Permanent mortgage | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate	2.00%		2.00%
Modified interest rate time period			5 years
Permanent mortgage | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modified interest rate time period			5 years

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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 14,474	$ 4,045	$ 15,623	$ 6,871
Accretion	(2,183)	(642)	(6,927)	(2,412)
Adjustment for payoffs	(840)	(198)	(2,559)	(1,232)
Adjustment for charge-offs	(122)	0	(1,046)	0
Adjustment for pool excess recovery	(123)	0	(123)	(222)
Increase/(decrease) in accretable yield	4,062	(2)	10,721	112
Disposals	0	0	(240)	0
Other	0	0	(181)	86
Balance, end of period	$ 15,268	$ 3,203	$ 15,268	$ 3,203

Loans - Schedule Of Acquired Pu

Loans - Schedule Of Acquired Purchase Credit Impaired Loans By Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 106,447	$ 176,381
Unpaid balance	120,680	199,687
Commercial, financial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	47,841	96,598
Unpaid balance	53,265	109,280
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	23,174	36,107
Unpaid balance	26,970	41,488
Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	33,203	38,176
Unpaid balance	37,900	42,568
Credit card & other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	2,229	5,500
Unpaid balance	$ 2,545	$ 6,351

Loans - Information By Class Re

Loans - Information By Class Related To Individually Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Related Allowance	$ 34,393		$ 34,393		$ 41,767
Recorded Investment	251,166		251,166		259,713
Unpaid Principal Balance	278,341		278,341		304,308
Average Recorded Investment	242,913	$ 260,083	246,566	$ 275,227
Interest Income Recognized	1,610	1,692	4,824	5,104
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	23,661		23,661		8,183
Unpaid principal balance, with no related allowance	24,484		24,484		17,372
Recorded investment, with related allowance	32,391		32,391		37,248
Unpaid principal balance, with recorded investment	33,155		33,155		44,831
Related Allowance	6,028		6,028		6,176
Recorded Investment	56,052		56,052		45,431
Unpaid Principal Balance	57,639		57,639		62,203
Average Recorded Investment	45,454	37,704	42,811	43,946
Average recorded investment, with no related allowance	25,920	5,771	23,301	8,706
Interest income recognized, with no related allowance	215	0	598	0
Average recorded investment, with related allowance	19,534	31,933	19,510	35,240
Interest income recognized, with related allowance	5	204	5	646
Interest Income Recognized	220	204	603	646
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	17,468		17,468		18,483
Unpaid principal balance, with no related allowance	28,430		28,430		31,544
Recorded investment, with related allowance	177,646		177,646		195,799
Unpaid principal balance, with recorded investment	192,272		192,272		210,561
Related Allowance	28,365		28,365		35,591
Recorded Investment	195,114		195,114		214,282
Unpaid Principal Balance	220,702		220,702		242,105
Average Recorded Investment	197,459	222,379	203,755	231,281
Average recorded investment, with no related allowance	16,923	20,100	17,548	20,251
Interest income recognized, with no related allowance	0	0	0	0
Average recorded investment, with related allowance	180,536	202,279	186,207	211,030
Interest income recognized, with related allowance	1,390	1,488	4,221	4,458
Interest Income Recognized	1,390	1,488	4,221	4,458
General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	21,555		21,555		8,183
Unpaid principal balance, with no related allowance	21,910		21,910		17,372
Recorded investment, with related allowance	29,058		29,058		31,774
Unpaid principal balance, with recorded investment	29,058		29,058		38,256
Related Allowance	5,103		5,103		5,119
Average recorded investment, with no related allowance	23,740	5,771	21,506	8,706
Interest income recognized, with no related allowance	203	0	561	0
Average recorded investment, with related allowance	16,375	26,144	16,038	29,136
Interest income recognized, with related allowance	0	193	0	597
TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with related allowance	2,936		2,936		3,067
Unpaid principal balance, with recorded investment	3,700		3,700		3,700
Related Allowance	925		925		925
Average recorded investment, with related allowance	2,960	3,117	3,004	3,157
Interest income recognized, with related allowance	0	0	0	0
Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	1,611		1,611		0
Unpaid principal balance, with no related allowance	1,611		1,611		0
Recorded investment, with related allowance	397		397		1,612
Unpaid principal balance, with recorded investment	397		397		1,612
Related Allowance	0		0		49
Average recorded investment, with no related allowance	1,680	0	1,379	0
Interest income recognized, with no related allowance	12	0	37	0
Average recorded investment, with related allowance	199	1,628	335	1,737
Interest income recognized, with related allowance	5	11	5	39
Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	495		495		0
Unpaid principal balance, with no related allowance	963		963		0
Recorded investment, with related allowance	0		0		795
Unpaid principal balance, with recorded investment	0		0		1,263
Related Allowance	0		0		83
Average recorded investment, with no related allowance	500	0	416	0
Interest income recognized, with no related allowance	0	0	0	0
Average recorded investment, with related allowance	0	1,044	133	1,210
Interest income recognized, with related allowance	0	0	0	10
HELOC | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	7,874		7,874		9,258
Unpaid principal balance, with no related allowance	15,869		15,869		19,193
Recorded investment, with related allowance	67,086		67,086		72,469
Unpaid principal balance, with recorded investment	70,168		70,168		75,207
Related Allowance	11,136		11,136		14,382
Average recorded investment, with no related allowance	8,343	10,225	8,878	10,536
Interest income recognized, with no related allowance	0	0	0	0
Average recorded investment, with related allowance	68,913	74,894	70,452	78,859
Interest income recognized, with related allowance	556	554	1,711	1,695
R/E installment loans | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	5,891		5,891		4,093
Unpaid principal balance, with no related allowance	6,518		6,518		4,663
Recorded investment, with related allowance	38,878		38,878		43,075
Unpaid principal balance, with recorded investment	39,581		39,581		43,827
Related Allowance	6,940		6,940		8,793
Average recorded investment, with no related allowance	4,631	4,182	4,032	4,014
Interest income recognized, with no related allowance	0	0	0	0
Average recorded investment, with related allowance	39,147	47,628	40,512	49,634
Interest income recognized, with related allowance	246	315	764	950
Permanent mortgage | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with no related allowance	3,703		3,703		5,132
Unpaid principal balance, with no related allowance	6,043		6,043		7,688
Recorded investment, with related allowance	71,130		71,130		79,662
Unpaid principal balance, with recorded investment	81,971		81,971		90,934
Related Allowance	9,996		9,996		12,105
Average recorded investment, with no related allowance	3,949	5,693	4,638	5,701
Interest income recognized, with no related allowance	0	0	0	0
Average recorded investment, with related allowance	71,898	79,305	74,617	82,186
Interest income recognized, with related allowance	585	616	1,737	1,805
Credit card & other | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment, with related allowance	552		552		593
Unpaid principal balance, with recorded investment	552		552		593
Related Allowance	293		293		$ 311
Average recorded investment, with related allowance	578	452	626	351
Interest income recognized, with related allowance	$ 3	$ 3	$ 9	$ 8

Loans - Balances Of Commercial

Loans - Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	$ 26,989,204	$ 26,989,204	$ 19,885,440
Total loans individually evaluated for impairment	251,166	251,166	254,831
Purchased credit-impaired loans	109,844	109,844	25,820
Allowance for Loan Losses	185,959	185,959	194,867	$ 185,462	$ 189,555	$ 197,257	$ 202,068
Allowance - collectively evaluated for impairment	148,168	148,168	147,928
Allowance - individually evaluated for impairment	34,393	34,393	43,804
Allowance - purchased credit-impaired loans	3,398	3,398	3,135		3,200
Gain on sale of TRUPs loans		(3,777)	$ 0
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	20,152,190	20,152,190			20,091,018
Total loans individually evaluated for impairment	56,052	56,052			45,431
Purchased credit-impaired loans	72,939	72,939			135,519
Total commercial loans	$ 20,281,181	$ 20,281,181			$ 20,271,968
Percent of total commercial loans (percent)	100.00%	100.00%			100.00%
Percent of loan collectively evaluated for impairment (percent)	99.00%	99.00%			99.00%
Percent of loan individually evaluated for impairment (percent)	0.00%	0.00%			0.00%
Percent of loan purchased-credit impaired (percent)	1.00%	1.00%			1.00%
Allowance for Loan Losses	$ 134,229	$ 134,229			$ 126,638
Allowance - collectively evaluated for impairment	126,275	126,275			117,649
Allowance - individually evaluated for impairment	6,028	6,028			6,176
Allowance - purchased credit-impaired loans	1,926	1,926			2,813
General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	13,595,136	13,595,136			13,511,033
Total loans individually evaluated for impairment	50,613	50,613			39,957
Purchased credit-impaired loans	49,743	49,743			99,407
Total commercial loans	13,695,492	13,695,492			13,650,397
Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	2,092,366	2,092,366			2,099,961
Total loans individually evaluated for impairment	0	0			0
Purchased credit-impaired loans	0	0			0
Total commercial loans	2,092,366	2,092,366			2,099,961
TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	253,351	253,351			303,848
Total loans individually evaluated for impairment	2,936	2,936			3,067
Purchased credit-impaired loans	0	0			0
Total commercial loans	256,287	256,287			306,915
Valuation allowance	20,500	20,500			$ 25,500
Highest internal grade					13
Financing receivable, sold	55,500	55,500
Financing receivable sold, allowance	5,000	5,000
Gain on sale of TRUPs loans	3,800
Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	4,046,917	4,046,917			$ 4,077,337
Total loans individually evaluated for impairment	2,008	2,008			1,612
Purchased credit-impaired loans	19,573	19,573			31,615
Total commercial loans	4,068,498	4,068,498			4,110,564
Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans collectively evaluated for impairment	164,420	164,420			98,839
Total loans individually evaluated for impairment	495	495			795
Purchased credit-impaired loans	3,623	3,623			4,497
Total commercial loans	168,538	168,538			104,131
Commercial Loan P D Grade One | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 600,791	$ 600,791			$ 538,744
Percent of total commercial loans (percent)	3.00%	3.00%			3.00%
Allowance for Loan Losses	$ 64	$ 64			$ 70
Commercial Loan P D Grade One | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	600,373	600,373			536,244
Commercial Loan P D Grade One | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade One | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade One | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	418	418			2,500
Commercial Loan P D Grade One | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Two | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 843,537	$ 843,537			$ 879,502
Percent of total commercial loans (percent)	4.00%	4.00%			4.00%
Allowance for Loan Losses	$ 261	$ 261			$ 339
Commercial Loan P D Grade Two | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	840,685	840,685			877,635
Commercial Loan P D Grade Two | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Two | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Two | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	2,815	2,815			1,798
Commercial Loan P D Grade Two | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	37	37			69
Commercial Loan P D Grade Three | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 1,588,569	$ 1,588,569			$ 1,445,319
Percent of total commercial loans (percent)	8.00%	8.00%			7.00%
Allowance for Loan Losses	$ 242	$ 242			$ 272
Commercial Loan P D Grade Three | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	730,939	730,939			582,224
Commercial Loan P D Grade Three | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	639,378	639,378			652,982
Commercial Loan P D Grade Three | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Three | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	218,170	218,170			210,073
Commercial Loan P D Grade Three | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	82	82			40
Commercial Loan P D Grade Four | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 1,909,372	$ 1,909,372			$ 1,898,712
Percent of total commercial loans (percent)	9.00%	9.00%			9.00%
Allowance for Loan Losses	$ 594	$ 594			$ 854
Commercial Loan P D Grade Four | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	909,454	909,454			959,581
Commercial Loan P D Grade Four | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	456,311	456,311			629,432
Commercial Loan P D Grade Four | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Four | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	543,486	543,486			309,699
Commercial Loan P D Grade Four | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	121	121			0
Commercial Loan P D Grade Five | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 2,872,291	$ 2,872,291			$ 2,208,347
Percent of total commercial loans (percent)	14.00%	14.00%			11.00%
Allowance for Loan Losses	$ 8,677	$ 8,677			$ 7,355
Commercial Loan P D Grade Five | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	1,879,972	1,879,972			1,461,632
Commercial Loan P D Grade Five | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	257,625	257,625			328,477
Commercial Loan P D Grade Five | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	36,620	36,620			0
Commercial Loan P D Grade Five | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	689,740	689,740			415,764
Commercial Loan P D Grade Five | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	8,334	8,334			2,474
Commercial Loan P D Grade Six | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 2,760,363	$ 2,760,363			$ 2,463,301
Percent of total commercial loans (percent)	14.00%	14.00%			12.00%
Allowance for Loan Losses	$ 8,269	$ 8,269			$ 10,495
Commercial Loan P D Grade Six | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	1,578,359	1,578,359			1,668,247
Commercial Loan P D Grade Six | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	450,207	450,207			335,169
Commercial Loan P D Grade Six | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	90,297	90,297			0
Commercial Loan P D Grade Six | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	604,757	604,757			456,706
Commercial Loan P D Grade Six | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	36,743	36,743			3,179
Commercial Loan P D Grade Seven | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 3,064,957	$ 3,064,957			$ 2,869,430
Percent of total commercial loans (percent)	15.00%	15.00%			14.00%
Allowance for Loan Losses	$ 15,154	$ 15,154			$ 13,490
Commercial Loan P D Grade Seven | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	2,390,220	2,390,220			2,257,400
Commercial Loan P D Grade Seven | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	98,832	98,832			47,720
Commercial Loan P D Grade Seven | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	52,927	52,927			0
Commercial Loan P D Grade Seven | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	505,988	505,988			554,590
Commercial Loan P D Grade Seven | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	16,990	16,990			9,720
Commercial Loan P D Grade Eight | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 1,542,393	$ 1,542,393			$ 1,376,652
Percent of total commercial loans (percent)	7.00%	7.00%			7.00%
Allowance for Loan Losses	$ 20,265	$ 20,265			$ 21,831
Commercial Loan P D Grade Eight | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	1,202,328	1,202,328			1,092,994
Commercial Loan P D Grade Eight | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	84,915	84,915			35,266
Commercial Loan P D Grade Eight | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	4,068	4,068			0
Commercial Loan P D Grade Eight | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	235,595	235,595			241,938
Commercial Loan P D Grade Eight | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	15,487	15,487			6,454
Commercial Loan P D Grade Nine | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 3,178,089	$ 3,178,089			$ 4,396,420
Percent of total commercial loans (percent)	15.00%	15.00%			22.00%
Allowance for Loan Losses	$ 20,617	$ 20,617			$ 9,804
Commercial Loan P D Grade Nine | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	1,974,390	1,974,390			2,633,854
Commercial Loan P D Grade Nine | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	105,098	105,098			70,915
Commercial Loan P D Grade Nine | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	45,117	45,117			0
Commercial Loan P D Grade Nine | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	978,148	978,148			1,630,176
Commercial Loan P D Grade Nine | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	75,336	75,336			61,475
Commercial Loan P D Grade Ten | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 527,929	$ 527,929			$ 421,424
Percent of total commercial loans (percent)	3.00%	3.00%			2.00%
Allowance for Loan Losses	$ 9,156	$ 9,156			$ 8,808
Commercial Loan P D Grade Ten | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	459,567	459,567			373,537
Commercial Loan P D Grade Ten | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Ten | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	18,536	18,536			0
Commercial Loan P D Grade Ten | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	45,560	45,560			43,297
Commercial Loan P D Grade Ten | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	4,266	4,266			4,590
Commercial Loan P D Grade Eleven | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 336,666	$ 336,666			$ 261,103
Percent of total commercial loans (percent)	2.00%	2.00%			1.00%
Allowance for Loan Losses	$ 8,033	$ 8,033			$ 6,784
Commercial Loan P D Grade Eleven | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	283,724	283,724			226,382
Commercial Loan P D Grade Eleven | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Eleven | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Eleven | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	52,546	52,546			31,785
Commercial Loan P D Grade Eleven | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	396	396			2,936
Commercial Loan P D Grade Twelve | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 381,642	$ 381,642			$ 573,366
Percent of total commercial loans (percent)	2.00%	2.00%			3.00%
Allowance for Loan Losses	$ 6,636	$ 6,636			$ 5,882
Commercial Loan P D Grade Twelve | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	275,015	275,015			409,838
Commercial Loan P D Grade Twelve | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Twelve | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Twelve | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	100,868	100,868			156,717
Commercial Loan P D Grade Twelve | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	5,759	5,759			6,811
Commercial Loan P D Grade Thirteen | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 352,882	$ 352,882			$ 522,436
Percent of total commercial loans (percent)	2.00%	2.00%			3.00%
Allowance for Loan Losses	$ 10,711	$ 10,711			$ 7,265
Commercial Loan P D Grade Thirteen | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	288,183	288,183			202,613
Commercial Loan P D Grade Thirteen | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Thirteen | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	5,786	5,786			303,848
Commercial Loan P D Grade Thirteen | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	58,840	58,840			15,707
Commercial Loan P D Grade Thirteen | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	73	73			268
Commercial Loan P D Grade Fourteen Fifteen Sixteen | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 192,709	$ 192,709			$ 236,262
Percent of total commercial loans (percent)	1.00%	1.00%			1.00%
Allowance for Loan Losses	$ 17,596	$ 17,596			$ 24,400
Commercial Loan P D Grade Fourteen Fifteen Sixteen | General C&I | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	181,927	181,927			228,852
Commercial Loan P D Grade Fourteen Fifteen Sixteen | Loans to Mortgage Companies | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Fourteen Fifteen Sixteen | TRUPs | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	0	0			0
Commercial Loan P D Grade Fourteen Fifteen Sixteen | Income CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	9,986	9,986			6,587
Commercial Loan P D Grade Fourteen Fifteen Sixteen | Residential CRE | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan, disaggregated by PD grade	$ 796	$ 796			$ 823

Loans - Loans by FICO Score, Co

Loans - Loans by FICO Score, Consumer (Details)	Sep. 30, 2018	Dec. 31, 2017
Consumer real estate | HELOC | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	60.80%	60.00%
Consumer real estate | HELOC | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.50%	8.70%
Consumer real estate | HELOC | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.10%	8.30%
Consumer real estate | HELOC | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	10.90%	11.10%
Consumer real estate | HELOC | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	5.20%	4.90%
Consumer real estate | HELOC | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	6.50%	7.00%
Consumer real estate | HELOC | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	100.00%	100.00%
Consumer real estate | R/E Installment Loans | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	71.10%	73.10%
Consumer real estate | R/E Installment Loans | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	9.00%	8.00%
Consumer real estate | R/E Installment Loans | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	6.60%	6.40%
Consumer real estate | R/E Installment Loans | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.00%	7.20%
Consumer real estate | R/E Installment Loans | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	2.80%	2.80%
Consumer real estate | R/E Installment Loans | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	2.50%	2.50%
Consumer real estate | 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)	51.20%	46.40%
Permanent Mortgage | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.50%	12.80%
Permanent Mortgage | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	9.00%	9.20%
Permanent Mortgage | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	15.90%	14.80%
Permanent Mortgage | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	6.50%	7.30%
Permanent Mortgage | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average refreshed FICO score (percent)	8.90%	9.50%
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	Sep. 30, 2018		Dec. 31, 2017		Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	$ 27,350,214	[1]	$ 27,658,929	[1]	$ 20,166,091
Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	27,108,765		27,435,858
Total Accruing	27,203,857		27,528,310
Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	53,613		50,884
Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	41,479		41,568
Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	101,712		70,040
Total Non- Accruing	146,357		130,619
Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,425		13,654
Non-Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	36,220		46,925
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	16,044,145		16,057,273
Commercial Portfolio Segment | General C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	13,645,749		13,550,990
Commercial Portfolio Segment | Loans to Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	2,092,366		2,099,961
Commercial Portfolio Segment | TRUPs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	256,287		306,915
Valuation allowance	20,500		25,500
Commercial Portfolio Segment | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	49,743		99,407
Commercial Portfolio Segment | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,978,736		15,996,404
Total Accruing	16,002,021		16,026,120
Commercial Portfolio Segment | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	9,586		10,264
Commercial Portfolio Segment | Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	13,699		19,452
Commercial Portfolio Segment | Accruing | General C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	13,597,235		13,514,752
Total Accruing	13,606,561		13,522,904
Commercial Portfolio Segment | Accruing | General C&I | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	9,202		8,057
Commercial Portfolio Segment | Accruing | General C&I | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	124		95
Commercial Portfolio Segment | Accruing | Loans to Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,092,366		2,099,961
Total Accruing	2,092,366		2,099,961
Commercial Portfolio Segment | Accruing | Loans to Mortgage Companies | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Accruing | Loans to Mortgage Companies | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Accruing | TRUPs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	253,351		303,848
Total Accruing	253,351		303,848
Commercial Portfolio Segment | Accruing | TRUPs | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Accruing | TRUPs | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	35,784		77,843
Total Accruing	49,743		99,407
Commercial Portfolio Segment | Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	384		2,207
Commercial Portfolio Segment | Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	13,575		19,357
Commercial Portfolio Segment | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	25,713		1,761
Total Non- Accruing	42,124		31,153
Commercial Portfolio Segment | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,284		7,019
Commercial Portfolio Segment | Non-Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	15,127		22,373
Commercial Portfolio Segment | Non-Accruing | General C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	25,713		1,761
Total Non- Accruing	39,188		28,086
Commercial Portfolio Segment | Non-Accruing | General C&I | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,284		7,019
Commercial Portfolio Segment | Non-Accruing | General C&I | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	12,191		19,306
Commercial Portfolio Segment | Non-Accruing | Loans to Mortgage Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	0		0
Commercial Portfolio Segment | Non-Accruing | Loans to Mortgage Companies | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Non-Accruing | Loans to Mortgage Companies | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Non-Accruing | TRUPs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	2,936		3,067
Commercial Portfolio Segment | Non-Accruing | TRUPs | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Non-Accruing | TRUPs | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,936		3,067
Commercial Portfolio Segment | Non-Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	0		0
Commercial Portfolio Segment | Non-Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial Portfolio Segment | Non-Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,237,036		4,214,695
Commercial real estate | Income CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,048,925		4,078,948
Commercial real estate | Residential CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	164,915		99,635
Commercial real estate | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	23,196		36,112
Commercial real estate | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,227,508		4,207,123
Total Accruing	4,236,030		4,213,302
Commercial real estate | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,417		3,926
Commercial real estate | Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	105		2,253
Commercial real estate | Accruing | Income CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,041,797		4,077,106
Total Accruing	4,048,449		4,078,346
Commercial real estate | Accruing | Income CRE | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	6,652		1,240
Commercial real estate | Accruing | Income CRE | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial real estate | Accruing | Residential CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	164,338		98,844
Total Accruing	164,385		98,844
Commercial real estate | Accruing | Residential CRE | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	47		0
Commercial real estate | Accruing | Residential CRE | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial real estate | Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	21,373		31,173
Total Accruing	23,196		36,112
Commercial real estate | Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,718		2,686
Commercial real estate | Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	105		2,253
Commercial real estate | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	70		56
Total Non- Accruing	1,006		1,393
Commercial real estate | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	37		0
Commercial real estate | Non-Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	899		1,337
Commercial real estate | Non-Accruing | Income CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	35		56
Total Non- Accruing	476		602
Commercial real estate | Non-Accruing | Income CRE | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	37		0
Commercial real estate | Non-Accruing | Income CRE | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	404		546
Commercial real estate | Non-Accruing | Residential CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	35		0
Total Non- Accruing	530		791
Commercial real estate | Non-Accruing | Residential CRE | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial real estate | Non-Accruing | Residential CRE | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	495		791
Commercial real estate | Non-Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	0		0
Commercial real estate | Non-Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Commercial real estate | Non-Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	6,191,183		6,367,755
Consumer real estate | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	1,578,460		1,823,710
Consumer real estate | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	4,578,389		4,505,515
Consumer real estate | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	34,334		38,530
Consumer real estate | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,065,415		6,254,801
Total Accruing	6,110,984		6,296,268
Consumer real estate | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	25,354		27,034
Consumer real estate | Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	20,215		14,433
Consumer real estate | Accruing | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,495,298		1,743,776
Total Accruing	1,518,411		1,771,222
Consumer real estate | Accruing | HELOC | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	14,582		17,744
Consumer real estate | Accruing | HELOC | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,531		9,702
Consumer real estate | Accruing | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,541,642		4,475,669
Total Accruing	4,558,239		4,486,516
Consumer real estate | Accruing | R/E Installment Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,589		7,274
Consumer real estate | Accruing | R/E Installment Loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,008		3,573
Consumer real estate | Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	28,475		35,356
Total Accruing	34,334		38,530
Consumer real estate | Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,183		2,016
Consumer real estate | Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	3,676		1,158
Consumer real estate | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	63,619		54,947
Total Non- Accruing	80,199		71,487
Consumer real estate | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	6,277		5,583
Consumer real estate | Non-Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	10,303		10,957
Consumer real estate | Non-Accruing | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	48,400		40,508
Total Non- Accruing	60,049		52,488
Consumer real estate | Non-Accruing | HELOC | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	4,038		3,626
Consumer real estate | Non-Accruing | HELOC | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	7,611		8,354
Consumer real estate | Non-Accruing | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,219		14,439
Total Non- Accruing	20,150		18,999
Consumer real estate | Non-Accruing | R/E Installment Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,239		1,957
Consumer real estate | Non-Accruing | R/E Installment Loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,692		2,603
Consumer real estate | Non-Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	0		0
Consumer real estate | Non-Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Consumer real estate | Non-Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Permanent mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	347,054		399,307
Permanent mortgage | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	315,746		365,527
Total Accruing	324,732		372,917
Permanent mortgage | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	4,051		3,930
Permanent mortgage | Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	4,935		3,460
Permanent mortgage | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	12,217		13,245
Total Non- Accruing	22,322		26,390
Permanent mortgage | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	749		1,052
Permanent mortgage | Non-Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	9,356		12,093
Credit Card And Other Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	530,796		619,899
Credit Card And Other Portfolio Segment | Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	196,051		196,364
Credit Card And Other Portfolio Segment | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	332,174		418,035
Credit Card And Other Portfolio Segment | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	2,571		5,500
Credit Card And Other Portfolio Segment | Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	521,360		612,003
Total Accruing	530,090		619,703
Credit Card And Other Portfolio Segment | Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	6,205		5,730
Credit Card And Other Portfolio Segment | Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,525		1,970
Credit Card And Other Portfolio Segment | Accruing | Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	193,681		193,940
Total Accruing	196,051		196,364
Credit Card And Other Portfolio Segment | Accruing | Credit card | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,292		1,371
Credit Card And Other Portfolio Segment | Accruing | Credit card | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,078		1,053
Credit Card And Other Portfolio Segment | Accruing | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	326,672		415,070
Total Accruing	331,468		417,839
Credit Card And Other Portfolio Segment | Accruing | Other | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	4,078		2,666
Credit Card And Other Portfolio Segment | Accruing | Other | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	718		103
Credit Card And Other Portfolio Segment | Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,007		2,993
Total Accruing	2,571		5,500
Credit Card And Other Portfolio Segment | Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	835		1,693
Credit Card And Other Portfolio Segment | Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	729		814
Credit Card And Other Portfolio Segment | Non-Accruing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	93		31
Total Non- Accruing	706		196
Credit Card And Other Portfolio Segment | Non-Accruing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	78		0
Credit Card And Other Portfolio Segment | Non-Accruing | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	535		165
Credit Card And Other Portfolio Segment | Non-Accruing | Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	0		0
Credit Card And Other Portfolio Segment | Non-Accruing | Credit card | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Credit Card And Other Portfolio Segment | Non-Accruing | Credit card | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Credit Card And Other Portfolio Segment | Non-Accruing | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	93		31
Total Non- Accruing	706		196
Credit Card And Other Portfolio Segment | Non-Accruing | Other | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	78		0
Credit Card And Other Portfolio Segment | Non-Accruing | Other | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	535		165
Credit Card And Other Portfolio Segment | Non-Accruing | Purchased credit-impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0		0
Total Non- Accruing	0		0
Credit Card And Other Portfolio Segment | Non-Accruing | Purchased credit-impaired loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
Credit Card And Other Portfolio Segment | Non-Accruing | Purchased credit-impaired loans | 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	$ 0		$ 0
[1]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

Loans - Schedule Of Troubled De

Loans - Schedule Of Troubled Debt Restructurings Occurring During The Year (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan
Financing Receivable, Modifications [Line Items]
Number | loan	91	99	254	229
Pre-Modification Outstanding Recorded Investment	$ 31,716	$ 6,376	$ 42,946	$ 16,030
Post-Modification Outstanding Recorded Investment	$ 31,337	$ 6,301	$ 42,208	$ 15,720
Credit card & other
Financing Receivable, Modifications [Line Items]
Number | loan	12	37	80	66
Pre-Modification Outstanding Recorded Investment	$ 65	$ 261	$ 370	$ 426
Post-Modification Outstanding Recorded Investment	$ 59	$ 251	$ 350	$ 411
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Number | loan	1	0	9	2
Pre-Modification Outstanding Recorded Investment	$ 25,591	$ 0	$ 27,639	$ 842
Post-Modification Outstanding Recorded Investment	$ 25,439	$ 0	$ 27,190	$ 836
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number | loan	1		4
Pre-Modification Outstanding Recorded Investment	$ 442		$ 643
Post-Modification Outstanding Recorded Investment	$ 442		$ 637
Consumer real estate
Financing Receivable, Modifications [Line Items]
Number | loan	77	60	156	150
Pre-Modification Outstanding Recorded Investment	$ 5,618	$ 6,081	$ 13,585	$ 12,719
Post-Modification Outstanding Recorded Investment	$ 5,397	$ 6,018	$ 13,318	$ 12,445
Permanent mortgage
Financing Receivable, Modifications [Line Items]
Number | loan	0	2	5	11
Pre-Modification Outstanding Recorded Investment	$ 0	$ 34	$ 709	$ 2,043
Post-Modification Outstanding Recorded Investment	$ 0	$ 32	$ 713	$ 2,028
General C&I | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Number | loan	1	0	9	2
Pre-Modification Outstanding Recorded Investment	$ 25,591	$ 0	$ 27,639	$ 842
Post-Modification Outstanding Recorded Investment	$ 25,439	$ 0	$ 27,190	$ 836
Income CRE | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number | loan	1		4
Pre-Modification Outstanding Recorded Investment	$ 442		$ 643
Post-Modification Outstanding Recorded Investment	$ 442		$ 637
HELOC | Consumer real estate
Financing Receivable, Modifications [Line Items]
Number | loan	15	45	79	107
Pre-Modification Outstanding Recorded Investment	$ 1,057	$ 4,451	$ 7,641	$ 9,333
Post-Modification Outstanding Recorded Investment	$ 1,041	$ 4,396	$ 7,580	$ 9,139
R/E installment loans | Consumer real estate
Financing Receivable, Modifications [Line Items]
Number | loan	62	15	77	43
Pre-Modification Outstanding Recorded Investment	$ 4,561	$ 1,630	$ 5,944	$ 3,386
Post-Modification Outstanding Recorded Investment	$ 4,356	$ 1,622	$ 5,738	$ 3,306

Loans - Schedule Of Troubled _2

Loans - Schedule Of Troubled Debt Restructurings Within The Previous 12 Months (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan
Financing Receivable, Modifications [Line Items]
Number | loan	18	5	52	16
Recorded Investment | $	$ 711	$ 1,952	$ 1,719	$ 11,200
Credit card & other
Financing Receivable, Modifications [Line Items]
Number | loan	13	2	39	5
Recorded Investment | $	$ 56	$ 12	$ 212	$ 30
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Number | loan	1	1	2	4
Recorded Investment | $	$ 321	$ 1,763	$ 579	$ 9,770
Consumer real estate
Financing Receivable, Modifications [Line Items]
Number | loan	1	0	6	4
Recorded Investment | $	$ 40	$ 0	$ 229	$ 685
Permanent mortgage
Financing Receivable, Modifications [Line Items]
Number | loan	3	1	5	2
Recorded Investment | $	$ 294	$ 89	$ 699	$ 627
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number | loan		1		1
Recorded Investment | $		$ 88		$ 88
General C&I | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Number | loan	1	1	2	4
Recorded Investment | $	$ 321	$ 1,763	$ 579	$ 9,770
Income CRE | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number | loan		1		1
Recorded Investment | $		$ 88		$ 88
HELOC | Consumer real estate
Financing Receivable, Modifications [Line Items]
Number | loan	1	0	5	4
Recorded Investment | $	$ 40	$ 0	$ 204	$ 685
R/E installment loans | Consumer real estate
Financing Receivable, Modifications [Line Items]
Number | loan	0		1
Recorded Investment | $	$ 0		$ 25

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017	Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 185,462		$ 197,257	$ 189,555		$ 202,068
Charge-offs	(9,482)		(10,670)	(27,973)		(28,913)
Recoveries	7,979		8,280	23,377		24,712
Provision/(provision credit) for loan losses	2,000		0	1,000		(3,000)
Ending Balance	185,959		194,867	185,959		194,867
Allowance - individually evaluated for impairment	34,393		43,804	34,393		43,804
Allowance - collectively evaluated for impairment	148,168		147,928	148,168		147,928
Allowance - purchased credit-impaired loans	3,398		3,135	3,398		3,135	$ 3,200
Individually evaluated for impairment	251,166		254,831	251,166		254,831
Collectively evaluated for impairment	26,989,204		19,885,440	26,989,204		19,885,440
Purchased credit-impaired loans	109,844		25,820	109,844		25,820
Total loans, net of unearned income	27,350,214	[1]	20,166,091	27,350,214	[1]	20,166,091	$ 27,658,929	[1]
C&I
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	96,834		92,379	98,211		89,398
Charge-offs	(1,391)		(3,723)	(6,753)		(6,188)
Recoveries	1,052		601	3,607		2,877
Provision/(provision credit) for loan losses	3,819		8,948	5,249		12,118
Ending Balance	100,314		98,205	100,314		98,205
Allowance - individually evaluated for impairment	6,028		6,895	6,028		6,895
Allowance - collectively evaluated for impairment	92,382		88,529	92,382		88,529
Allowance - purchased credit-impaired loans	1,904		2,781	1,904		2,781
Individually evaluated for impairment	53,549		32,028	53,549		32,028
Collectively evaluated for impairment	15,940,853		12,739,091	15,940,853		12,739,091
Purchased credit-impaired loans	49,743		20,725	49,743		20,725
Total loans, net of unearned income	16,044,145		12,791,844	16,044,145		12,791,844
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	33,832		30,470	28,427		33,852
Charge-offs	(9)		0	(281)		(20)
Recoveries	267		278	348		639
Provision/(provision credit) for loan losses	(175)		(1,065)	5,421		(4,788)
Ending Balance	33,915		29,683	33,915		29,683
Allowance - individually evaluated for impairment	0		126	0		126
Allowance - collectively evaluated for impairment	33,893		29,557	33,893		29,557
Allowance - purchased credit-impaired loans	22		0	22		0
Individually evaluated for impairment	2,503		2,320	2,503		2,320
Collectively evaluated for impairment	4,211,337		2,244,895	4,211,337		2,244,895
Purchased credit-impaired loans	23,196		3,800	23,196		3,800
Total loans, net of unearned income	4,237,036		2,251,015	4,237,036		2,251,015
Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	31,769		46,069	37,371		50,357
Charge-offs	(2,801)		(3,601)	(6,193)		(11,401)
Recoveries	5,302		6,188	15,129		17,007
Provision/(provision credit) for loan losses	(7,733)		(7,717)	(19,770)		(15,024)
Ending Balance	26,537		40,939	26,537		40,939
Allowance - individually evaluated for impairment	18,076		23,936	18,076		23,936
Allowance - collectively evaluated for impairment	7,331		16,649	7,331		16,649
Allowance - purchased credit-impaired loans	1,130		354	1,130		354
Individually evaluated for impairment	119,729		135,858	119,729		135,858
Collectively evaluated for impairment	6,037,120		4,232,564	6,037,120		4,232,564
Purchased credit-impaired loans	34,334		1,295	34,334		1,295
Total loans, net of unearned income	6,191,183		4,369,717	6,191,183		4,369,717
Permanent Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	14,078		16,398	15,565		16,289
Charge-offs	(15)		(173)	(475)		(1,499)
Recoveries	554		542	1,250		1,933
Provision/(provision credit) for loan losses	(1,137)		(1,048)	(2,860)		(1,004)
Ending Balance	13,480		15,719	13,480		15,719
Allowance - individually evaluated for impairment	9,996		12,601	9,996		12,601
Allowance - collectively evaluated for impairment	3,484		3,118	3,484		3,118
Allowance - purchased credit-impaired loans	0		0	0		0
Individually evaluated for impairment	74,833		84,081	74,833		84,081
Collectively evaluated for impairment	272,221		319,001	272,221		319,001
Purchased credit-impaired loans	0		0	0		0
Total loans, net of unearned income	347,054		403,082	347,054		403,082
Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	8,949		11,941	9,981		12,172
Charge-offs	(5,266)		(3,173)	(14,271)		(9,805)
Recoveries	804		671	3,043		2,256
Provision/(provision credit) for loan losses	7,226		882	12,960		5,698
Ending Balance	11,713		10,321	11,713		10,321
Allowance - individually evaluated for impairment	293		246	293		246
Allowance - collectively evaluated for impairment	11,078		10,075	11,078		10,075
Allowance - purchased credit-impaired loans	342		0	342		0
Individually evaluated for impairment	552		544	552		544
Collectively evaluated for impairment	527,673		349,889	527,673		349,889
Purchased credit-impaired loans	2,571		0	2,571		0
Total loans, net of unearned income	$ 530,796		$ 350,433	$ 530,796		$ 350,433
[1]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

Intangible Assets - Summary Of

Intangible Assets - Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)branch	Dec. 31, 2017USD ($)
Intangible Assets [Line Items]
Gross Carrying Amount	$ 240,637	$ 244,137
Accumulated Amortization	(79,142)	(59,748)
Net Carrying Value	$ 161,495	184,389
Number of branches divested | branch	2
State banking licenses
Intangible Assets [Line Items]
Net Carrying Value	$ 300
Core deposit intangibles
Intangible Assets [Line Items]
Gross Carrying Amount	157,150	160,650
Accumulated Amortization	(23,148)	(8,176)
Net Carrying Value	134,002	152,474
Customer relationships
Intangible Assets [Line Items]
Gross Carrying Amount	77,865	77,865
Accumulated Amortization	(54,404)	(50,777)
Net Carrying Value	23,461	27,088
Other
Intangible Assets [Line Items]
Gross Carrying Amount	5,622	5,622
Accumulated Amortization	(1,590)	(795)
Net Carrying Value	$ 4,032	$ 4,827

Intangible Assets - Narrative (

Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 6,500	$ 2,000	$ 19,400	$ 5,200
Goodwill [Line Items]
Goodwill	1,409,822	$ 236,335	1,409,822	$ 236,335	$ 1,386,853	$ 191,371
Non-Strategic
Goodwill [Line Items]
Gross goodwill	200,000		200,000		200,000
Accumulated impairments	114,100		114,100		114,100
Accumulated divestiture related write-offs	85,900		85,900		85,900
Goodwill	$ 0		$ 0		$ 0

Intangible Assets - Schedule Of

Intangible Assets - Schedule Of Estimated Aggregate Amortization Expense for Intangible Assets (Details) $ in Thousands	Sep. 30, 2018USD ($)
Year
Remainder of 2018	$ 6,471
2,019	24,834
2,020	21,159
2,021	19,547
2,022	17,412
2,023	$ 16,117

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	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,386,853	$ 191,371
Additions	22,969	44,964
Goodwill, ending balance	1,409,822	236,335
Regional Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	1,243,885	93,367
Additions	22,969	0
Goodwill, ending balance	1,266,854	93,367
Fixed Income
Goodwill [Roll Forward]
Goodwill, beginning balance	142,968	98,004
Additions	0	44,964
Goodwill, ending balance	$ 142,968	$ 142,968

Other Income and Other Expens_2

Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
All other income and commissions:
Other service charges	$ 3,758	$ 2,954	$ 11,609	$ 9,047
ATM and interchange fees	3,263	3,137	9,943	8,998
Dividend income	2,757	0	8,130	0
Mortgage banking	2,533	1,354	7,510	3,883
Deferred compensation	1,458	1,128	2,900	4,446
Electronic banking fees	1,309	1,282	3,741	3,911
Letter of credit fees	1,307	1,211	3,851	3,369
Insurance commissions	396	567	1,629	2,042
(Gain)/loss on extinguishment of debt	(1)	(14,329)	(1)	(14,329)
Other	5,875	2,739	16,020	7,684
Total	22,655	43	65,332	29,051
All other expense:
Travel and entertainment	3,988	2,798	12,102	8,308
Other insurance and taxes	2,761	2,396	8,178	7,229
Employee training and dues	1,682	1,198	5,310	4,194
Supplies	1,635	928	5,458	2,884
Non-service components of net periodic pension and post-retirement cost	1,585	454	3,619	1,782
Tax credit investments	1,370	762	3,586	2,646
Customer relations	1,328	1,361	3,749	4,240
OREO	1,256	303	2,174	953
Miscellaneous loan costs	543	757	2,720	2,078
Litigation and regulatory matters	(1,541)	8,162	609	8,403
Other	11,094	8,994	64,527	29,837
Total	$ 25,701	$ 28,113	$ 112,032	$ 72,554

Components of Other Comprehen_3

Components of Other Comprehensive Income/(Loss) - Schedule of Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017		Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, January 1			$ 4,580,488		$ 2,705,084
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12							$ 67	$ 0
Beginning balance, as adjusted							4,580,555	$ 2,705,084
Net unrealized gains/(losses)	$ (28,441)	$ 4,317	(121,134)		13,966
Amounts reclassified from AOCI	2,906	761	6,521		1,304
Other comprehensive income/(loss)	(25,535)	5,078	(114,613)	[1]	15,270	[1]
Balance, September 30	4,741,931	2,883,551	4,741,931		2,883,551
Securities AFS
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, January 1	(107,476)	(9,857)	(26,834)		(17,232)
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12							(5)
Beginning balance, as adjusted							(26,839)
Net unrealized gains/(losses)	(25,924)	3,918	(106,522)		11,570
Amounts reclassified from AOCI	0	(1)	(39)		(278)
Other comprehensive income/(loss)	(25,924)	3,917	(106,561)		11,292
Balance, September 30	(133,400)	(5,940)	(133,400)		(5,940)
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, January 1	(19,757)	(1,024)	(7,764)		(1,265)
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12							(206)
Beginning balance, as adjusted							(7,970)
Net unrealized gains/(losses)	(2,517)	(91)	(14,612)		1,906
Amounts reclassified from AOCI	771	(643)	1,079		(2,399)
Other comprehensive income/(loss)	(1,746)	(734)	(13,533)		(493)
Balance, September 30	(21,503)	(1,758)	(21,503)		(1,758)
Pension and Post-retirement Plans
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, January 1	(284,881)	(226,581)	(288,227)		(229,157)
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12							0
Beginning balance, as adjusted							(288,227)
Net unrealized gains/(losses)	0	490	0		490
Amounts reclassified from AOCI	2,135	1,405	5,481		3,981
Other comprehensive income/(loss)	2,135	1,895	5,481		4,471
Balance, September 30	(282,746)	(224,686)	(282,746)		(224,686)
Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, January 1	(412,114)	(237,462)	(322,825)		(247,654)
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12							(211)
Beginning balance, as adjusted							$ (323,036)
Balance, September 30	$ (437,649)	$ (232,384)	$ (437,649)		$ (232,384)
[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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Debt securities gains/(losses), net	$ 0	$ 1	$ 52	$ 450
Provision/(benefit) for income taxes	83,925	13,596	133,553	57,903
Interest and fees on loans	331,000	205,220	954,467	578,264
All other expense	25,701	28,113	112,032	72,554
Net income/(loss)	274,716	71,769	455,702	225,361
Reclassifications from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income/(loss)	2,906	761	6,521	1,304
Reclassifications from AOCI | Securities AFS
Accumulated Other Comprehensive Income (Loss) [Line Items]
Debt securities gains/(losses), net	0	(1)	(52)	(450)
Provision/(benefit) for income taxes	0	0	13	172
Net income/(loss)	0	(1)	(39)	(278)
Reclassifications from AOCI | Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision/(benefit) for income taxes	(253)	398	(354)	1,487
Interest and fees on loans	1,024	(1,041)	1,433	(3,886)
Net income/(loss)	771	(643)	1,079	(2,399)
Reclassifications from AOCI | Pension and Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision/(benefit) for income taxes	(701)	(872)	(1,799)	(2,469)
All other expense	2,836	2,277	7,280	6,450
Net income/(loss)	$ 2,135	$ 1,405	$ 5,481	$ 3,981

Earnings Per Share -Schedule Of

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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income/(loss)	$ 274,716	$ 71,769	$ 455,702	$ 225,361
Net income attributable to noncontrolling interest	2,883	2,883	8,555	8,555
Net income/(loss) attributable to controlling interest	271,833	68,886	447,147	216,806
Preferred stock dividends	1,550	1,550	4,650	4,650
Net income/(loss) available to common shareholders	$ 270,283	$ 67,336	$ 442,497	$ 212,156
Weighted average common shares outstanding - basic (in shares)	324,406	233,749	325,341	233,438
Effect of dilutive securities (in shares)	2,846	2,591	3,304	2,934
Weighted average common shares outstanding - diluted (in shares)	327,252	236,340	328,645	236,372
Net income/(loss) per share available to common shareholders (in dollars per share)	$ 0.83	$ 0.29	$ 1.36	$ 0.91
Diluted income/(loss) per share available to common shareholders (in dollars per share)	$ 0.83	$ 0.28	$ 1.35	$ 0.90

Earnings Per Share - Schedule O

Earnings Per Share - Schedule Of Anti-Dilutive Options and Awards (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 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)	$ 23.67	$ 25	$ 24.43	$ 25.70
Employee stock option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from the calculation of diluted EPS (in shares)	2,251	2,595	2,316	2,490
Other equity awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from the calculation of diluted EPS (in shares)	1,605	1,002	538	325

Contingencies and Other Discl_3

Contingencies and Other Disclosures (Details) shares in Millions	9 Months Ended	36 Months Ended	48 Months Ended
	Sep. 30, 2018USD ($)entityshares	Dec. 31, 2007USD ($)	Dec. 31, 2008USD ($)	Dec. 31, 2017USD ($)
Loss Contingencies [Line Items]
Estimated litigation liability	$ 32,800,000
Number of GSEs to which conventional conforming single-family mortgage loans were predominately sold to | entity	2
Loan-to-value ratio at origination	80.00%
Subservicing agreement, period	3 years
Mortgage loans originated and sold to agencies			$ 69,500,000,000
Loans sold to GSEs			57,600,000,000
Loans guaranteed by Ginnie Mae			$ 11,900,000,000
Loans included in FH proprietary securitizations		$ 26,700,000,000
Accrued losses on loan repurchase exposure	$ 32,500,000			$ 34,200,000
Subservicer expenditure reimbursement amount disputed
Loss Contingencies [Line Items]
Actual damages sought by plaintiff	$ 43,500,000
Visa Class B Shares
Loss Contingencies [Line Items]
Number of Visa Class B shares (in shares) | shares	2.4
Mortgage Securitization Litigation
Loss Contingencies [Line Items]
Investment in proprietary securitizations subject to lawsuits	$ 83,400,000
Investment in proprietary securitizations subject to indemnifications	231,200,000
Minimum
Loss Contingencies [Line Items]
Estimated reasonably possible losses in excess of currently established liabilities	0
Maximum
Loss Contingencies [Line Items]
Estimated reasonably possible losses in excess of currently established liabilities	$ 20,000,000

Pension, Savings, and Other E_3

Pension, Savings, and Other Employee Benefits - Narrative (Details) $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2017USD ($)	Sep. 30, 2018USD ($)pension_plan	Dec. 31, 2017USD ($)
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 plan | Qualified plan
Defined Benefit Plan Disclosure [Line Items]
Estimated social security benefits age		65 years
Contributions	$ 5.1
Defined benefit plan, benefit obligation	18.7		$ 18.7
Defined benefit plan, fair value of plan assets	$ 18.6		18.6
Pension plan | Non-Qualified Plans
Defined Benefit Plan Disclosure [Line Items]
Contributions			$ 5.4
Expected pension contribution		$ 5.7
Pension plan | Capital Bank Financial Corporation | Qualified plan
Defined Benefit Plan Disclosure [Line Items]
Number of additional qualified pension plans | pension_plan		2

Pension, Savings, and Other E_4

Pension, Savings, and Other Employee Benefits - Schedule Of Components Of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Benefits
Components of net periodic benefit cost
Service cost	$ 11	$ 9	$ 31	$ 28
Interest cost	6,935	7,276	20,908	22,035
Expected return on plan assets	(8,222)	(9,230)	(24,673)	(27,011)
Amortization of unrecognized:
Prior service cost/(credit)	0	13	0	39
Actuarial (gain)/loss	3,164	2,380	9,076	7,140
Net periodic benefit cost/(credit)	1,888	448	5,342	2,231
Other Benefits
Components of net periodic benefit cost
Service cost	33	26	100	80
Interest cost	328	328	982	979
Expected return on plan assets	(268)	(236)	(806)	(710)
Amortization of unrecognized:
Prior service cost/(credit)	0	23	0	71
Actuarial (gain)/loss	(108)	(140)	(290)	(425)
Net periodic benefit cost/(credit)	$ (15)	$ 1	$ (14)	$ (5)

Business Segment Information -

Business Segment Information - Amounts Of Consolidated Revenue, Expense, Tax And Assets (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)
Segment Reporting [Abstract]
Number of business segments | segment			4
Segment Reporting Information [Line Items]
Net interest income	$ 305,700	$ 209,817	$ 917,805	$ 600,226
Provision/(provision credit) for loan losses	2,000	0	1,000	(3,000)
Noninterest income	348,972	112,417	612,514	357,029
Noninterest expense	294,031	236,869	940,064	676,991
Income/(loss) before income taxes	358,641	85,365	589,255	283,264
Provision/(benefit) for income taxes	83,925	13,596	133,553	57,903
Net income/(loss)	274,716	71,769	455,702	225,361
Average assets	40,077,033	28,874,827	40,199,487	28,852,679
Loss on sale of equity investments			(212,924)	(5)
Gain on sale of TRUPs loans			(3,777)	0
Visa Class B Shares
Segment Reporting Information [Line Items]
Gain on sale of investments	212,900		212,900
Regional Banking
Segment Reporting Information [Line Items]
Net interest income	302,448	209,100	902,546	604,075
Provision/(provision credit) for loan losses	8,045	8,552	17,428	11,910
Noninterest income	79,857	64,370	240,093	188,089
Noninterest expense	207,591	150,445	619,283	451,135
Income/(loss) before income taxes	166,669	114,473	505,928	329,119
Provision/(benefit) for income taxes	39,101	41,191	118,929	118,771
Net income/(loss)	127,568	73,282	386,999	210,348
Average assets	28,659,158	19,158,852	28,450,747	18,519,999
Fixed Income
Segment Reporting Information [Line Items]
Net interest income	9,048	5,985	26,686	12,126
Noninterest income	41,123	55,803	125,091	161,833
Noninterest expense	47,306	53,136	145,635	155,865
Income/(loss) before income taxes	2,865	8,652	6,142	18,094
Provision/(benefit) for income taxes	532	2,970	988	5,929
Net income/(loss)	2,333	5,682	5,154	12,165
Average assets	3,247,016	2,586,773	3,326,118	2,388,740
Corporate
Segment Reporting Information [Line Items]
Net interest income	(15,415)	(13,769)	(48,651)	(42,408)
Noninterest income	222,619	(9,476)	240,665	2,219
Noninterest expense	33,323	23,926	152,797	65,365
Income/(loss) before income taxes	173,881	(47,171)	39,217	(105,554)
Provision/(benefit) for income taxes	40,529	(34,167)	4,253	(82,758)
Net income/(loss)	133,352	(13,004)	34,964	(22,796)
Average assets	6,904,585	5,697,894	6,990,484	6,421,643
Loss on sale of equity investments		14,300		14,300
Non-Strategic
Segment Reporting Information [Line Items]
Net interest income	9,619	8,501	37,224	26,433
Provision/(provision credit) for loan losses	(6,045)	(8,552)	(16,428)	(14,910)
Noninterest income	5,373	1,720	6,665	4,888
Noninterest expense	5,811	9,362	22,349	4,626
Income/(loss) before income taxes	15,226	9,411	37,968	41,605
Provision/(benefit) for income taxes	3,763	3,602	9,383	15,961
Net income/(loss)	11,463	5,809	28,585	25,644
Average assets	$ 1,266,274	$ 1,431,308	1,432,138	$ 1,522,297
Gain on sale of TRUPs loans			$ 3,800

Business Segment Information _2

Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Fixed income	$ 44,813	$ 55,758	$ 128,016	$ 161,546
Deposit transactions and cash management	35,792	28,011	107,859	80,434
Brokerage, management fees and commissions	14,200	11,937	41,423	35,872
Trust services and investment management	7,438	6,953	22,847	21,304
Bankcard income	6,878	6,170	19,958	17,230
Bank-owned life insurance (BOLI)	4,337	3,539	14,103	11,137
Debt securities gains/(losses), net	0	1	52	450
Equity securities gains/(losses), net	212,859	5	212,924	5
All other income and commissions	22,655	43	65,332	29,051
Total noninterest income	348,972	112,417	612,514	357,029
Gain on sale of TRUPs loans			(3,777)	0
All other income and commissions (e)			2,469	13
Loss on sale of equity investments			(212,924)	(5)
Visa Class B Shares
Disaggregation of Revenue [Line Items]
Gain on sale of investments	212,900		212,900
Underwriting, Portfolio Advisory, and Other Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	8,400		24,000
Regional Banking
Disaggregation of Revenue [Line Items]
Fixed income	103	135	314	348
Deposit transactions and cash management	34,008	26,620	103,275	76,288
Brokerage, management fees and commissions	14,200	11,937	41,423	35,872
Trust services and investment management	7,453	6,968	22,891	21,360
Bankcard income	6,999	6,057	19,921	16,894
Bank-owned life insurance (BOLI)	0	0	0	0
Debt securities gains/(losses), net	0	0	0	386
Equity securities gains/(losses), net	0	0	0	0
All other income and commissions	17,094	12,653	52,269	36,941
Total noninterest income	79,857	64,370	240,093	188,089
Fixed Income
Disaggregation of Revenue [Line Items]
Fixed income	40,937	55,623	123,929	161,198
Deposit transactions and cash management	3	0	9	0
Brokerage, management fees and commissions	0	0	0	0
Trust services and investment management	0	0	0	0
Bankcard income	0	0	0	0
Bank-owned life insurance (BOLI)	0	0	0	0
Debt securities gains/(losses), net	0	0	0	0
Equity securities gains/(losses), net	0	0	0	0
All other income and commissions	183	180	1,153	635
Total noninterest income	41,123	55,803	125,091	161,833
Corporate
Disaggregation of Revenue [Line Items]
Fixed income	(5)	0	(5)	0
Deposit transactions and cash management	1,725	1,339	4,416	4,004
Brokerage, management fees and commissions	0	0	0	0
Trust services and investment management	(15)	(15)	(44)	(56)
Bankcard income	57	56	168	169
Bank-owned life insurance (BOLI)	4,337	3,539	14,103	11,137
Debt securities gains/(losses), net	0	1	52	64
Equity securities gains/(losses), net	212,859	5	212,924	5
All other income and commissions	3,661	(14,401)	9,051	(13,104)
Total noninterest income	222,619	(9,476)	240,665	2,219
All other income and commissions (e)			4,100
Loss on sale of equity investments		14,300		14,300
Non-Strategic
Disaggregation of Revenue [Line Items]
Fixed income	3,778	0	3,778	0
Deposit transactions and cash management	56	52	159	142
Brokerage, management fees and commissions	0	0	0	0
Trust services and investment management	0	0	0	0
Bankcard income	(178)	57	(131)	167
Bank-owned life insurance (BOLI)	0	0	0	0
Debt securities gains/(losses), net	0	0	0	0
Equity securities gains/(losses), net	0	0	0	0
All other income and commissions	1,717	1,611	2,859	4,579
Total noninterest income	$ 5,373	$ 1,720	6,665	$ 4,888
Gain on sale of TRUPs loans			$ 3,800

Variable Interest Entities - Su

Variable Interest Entities - Summary of VIE Consolidated By FHN (Details) - USD ($) $ in Thousands	Sep. 30, 2018		Jun. 30, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 642,051			$ 639,073
Loans, net of unearned income	27,350,214	[1]		27,658,929	[1]	$ 20,166,091
Less: Allowance for loan losses	185,959		$ 185,462	189,555		$ 194,867	$ 197,257	$ 202,068
Total net loans	27,164,255			27,469,374
Other assets	1,883,077			1,723,189
Total assets	40,635,924			41,423,388
Liabilities:
Term borrowings	1,200,134			1,218,097
Other liabilities	552,921			549,234
Total liabilities	35,893,993			36,842,900
On-Balance Sheet Consumer Loan Securitization
Assets:
Cash and due from banks	0			0
Loans, net of unearned income	17,106			24,175
Less: Allowance for loan losses	0			0
Total net loans	17,106			24,175
Other assets	35			47
Total assets	17,141			24,222
Liabilities:
Term borrowings	4,071			11,226
Other liabilities	0			2
Total liabilities	4,071			11,228
Rabbi Trusts Used for Deferred Compensation Plans
Assets:
Other assets	84,170			80,479
Total assets	84,170			80,479
Liabilities:
Other liabilities	63,017			61,733
Total liabilities	$ 63,017			$ 61,733
[1]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

Variable Interest Entities - Na

Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Nov. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Expense from affordable housing projects, equity method investments		$ 1,200	$ 300	$ 3,100	$ 1,400
Capital Bank Financial Corporation
Variable Interest Entity [Line Items]
Term borrowings		187,169		$ 187,169
Junior Subordinated Debt | Capital Bank Financial Corporation
Variable Interest Entity [Line Items]
Term borrowings						$ 212,400
Debt called during period		$ 10,300
Scenario, Forecast | Junior Subordinated Debt | Capital Bank Financial Corporation
Variable Interest Entity [Line Items]
Debt called during period	$ 35,100

Variable Interest Entities - _2

Variable Interest Entities - Summary of the Impact of Qualifying LIHTC Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Low income housing tax credits
Variable Interest Entity [Line Items]
Amortization of qualifying LIHTC investments	$ 1,547	$ 3,774	$ 6,094	$ 8,414
Other tax benefits related to qualifying LIHTC investments	(2,584)	(3,103)	(7,681)	(8,101)
Other tax benefits related to qualifying LIHTC investments
Variable Interest Entity [Line Items]
Other tax benefits related to qualifying LIHTC investments	$ (1,412)	$ (2,478)	$ (2,996)	$ (4,307)

Variable Interest Entities - _3

Variable Interest Entities - Summary of VIE Not Consolidated By FHN (Details) - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017		Sep. 30, 2017
Variable Interest Entity [Line Items]
Loans, net of unearned income	$ 27,350,214	[1]	$ 27,658,929	[1]	$ 20,166,091
Trading securities	1,930,991		1,416,345
Term borrowings	1,200,134		1,218,097
Low income housing partnerships
Variable Interest Entity [Line Items]
Maximum Loss Exposure	118,355		94,798
Liability Recognized	52,148		33,348
Maximum loss exposure, contractual funding commitments	52,100		33,300
Low income housing partnerships | Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments	66,200		61,500
Other tax credit investments
Variable Interest Entity [Line Items]
Maximum Loss Exposure	17,878		20,394
Liability Recognized	0		0
Other tax credit investments | Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments	18,000		18,000
Small issuer trust preferred holdings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	276,825		332,455
Liability Recognized	0		0
On-balance sheet trust preferred securitization
Variable Interest Entity [Line Items]
Maximum Loss Exposure	48,306		48,817
Liability Recognized	65,868		65,357
Loans, net of unearned income	112,500		112,500
Trading securities	1,700		1,700
Term borrowings	65,900		65,400
Proprietary residential mortgage securitizations
Variable Interest Entity [Line Items]
Maximum Loss Exposure	1,592		2,151
Liability Recognized	0		0
Holdings of agency mortgage-backed securities
Variable Interest Entity [Line Items]
Maximum Loss Exposure	5,209,810		5,349,287
Liability Recognized	0		0
Trading securities	800,000		500,000
Securities available-for-sale	4,400,000		4,800,000
Commercial loan troubled debt restructurings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	41,926		19,411
Liability Recognized	0		0
Maximum loss exposure, contractual funding commitments	600		300
Loans, net of unearned income	41,400		19,100
Sale-leaseback transaction
Variable Interest Entity [Line Items]
Maximum Loss Exposure	16,327		14,827
Liability Recognized	0		0
Proprietary trust preferred issuances
Variable Interest Entity [Line Items]
Maximum Loss Exposure	0		0
Liability Recognized	$ 202,068		$ 212,378
[1]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total trading revenues	$ 34,300	$ 45,000			$ 102,300	$ 133,300
Term borrowings	1,200,134				1,200,134		$ 1,218,097
Cash flow hedge length of time				5 years
Hedged amount of foreign currency denominated loans	10,600				10,600		1,500
Cash Flow Hedges | Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)				$ 250,000
Notional amount			$ 650,000
Cash Flow Hedges | Hedging Instruments | Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Initial duration			3 years
Cash Flow Hedges | Hedging Instruments | Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Initial duration			7 years
Long Term Debt Hedged With Fair Value Interest Rate Derivatives Using Long Haul Method
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	500,000				500,000
Net fair value of interest rate derivatives hedging	0				0		200
Derivative Instruments With Adjustable Collateral Posting Thresholds | Additional Derivative Agreements
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds	22,000				22,000		23,300
Net fair value of derivative liabilities with adjustable posting thresholds	57,700				57,700		34,500
Collateral received	92,300				92,300		119,300
Securities posted collateral	20,400				20,400		18,900
Derivative Instruments With Accelerated Termination Provisions | Additional Derivative Agreements
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds	18,100				18,100		22,800
Net fair value of derivative liabilities with adjustable posting thresholds	54,500				54,500		19,400
Collateral received	88,200				88,200		118,600
Securities posted collateral	20,900				20,900		6,700
FTBNA | Long Term Debt Hedged With Fair Value Interest Rate Derivatives Using Long Haul Method
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	400,000				400,000
Net fair value of interest rate derivatives hedging	0				0		100
Certain Counterparties
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash receivables	81,700				81,700		60,300
Collateral cash payables	50,300				50,300		49,700
Visa Class B Shares
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities related to sale	34,200				34,200		$ 5,600
Derivative liabilities related to sale, transaction executed	$ 28,100				$ 28,100

Derivatives - Derivatives Assoc

Derivatives - Derivatives Associated with Fixed Income Trading Activities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 2,200,080	$ 2,026,753
Assets	7,861	22,097
Liabilities	55,392	18,323
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	2,200,080	2,026,753
Assets	7,904	17,931
Liabilities	8,244	20,720
Option contracts purchased | Long
Derivative Instruments, Gain (Loss) [Line Items]
Notional	30,000	20,000
Assets	32	15
Liabilities	0	0
Forwards and futures purchased
Derivative Instruments, Gain (Loss) [Line Items]
Notional	5,425,631	6,257,140
Assets	4,915	4,354
Liabilities	14,002	5,526
Forwards and futures sold
Derivative Instruments, Gain (Loss) [Line Items]
Notional	5,701,595	6,292,012
Assets	15,098	5,806
Liabilities	$ 4,768	$ 4,010

Derivatives - Derivatives Ass_2

Derivatives - Derivatives Associated With Interest Rate Risk Management Activities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 2,200,080	$ 2,026,753
Assets	7,861	22,097
Liabilities	55,392	18,323
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	2,200,080	2,026,753
Assets	7,904	17,931
Liabilities	8,244	20,720
Customer Interest Rate Contracts Hedging | Hedging Instruments And Hedged Items | Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	1,871,936	1,608,912
Assets	3,792	11,644
Liabilities	50,992	19,780
Customer Interest Rate Contracts Hedging | Hedging Instruments And Hedged Items | Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	1,871,936	1,608,912
Assets	14,182	18,473
Liabilities	2,608	11,019
Debt Hedging | Hedging Instruments And Hedged Items | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional	900,000	900,000
Assets	189	371
Debt Hedging | Hedging Instruments And Hedged Items | Term borrowings, Par
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	900,000	900,000
Debt Hedging | Hedging Instruments And Hedged Items | Term borrowings, Cumulative fair value hedging adjustments
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	(21,782)	(13,472)
Debt Hedging | Hedging Instruments And Hedged Items | Term borrowings, Unamortized premium/(discount) and issuance costs
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	(2,699)	(3,910)
Debt Hedging | Hedging Instruments And Hedged Items | Total carrying value
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	$ 875,519	$ 882,618

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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Customer Interest Rate Contracts Hedging | Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) related to interest rate derivatives	$ (10,620)	$ (180)	$ (39,803)	$ 643
Customer Interest Rate Contracts Hedging | Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) related to interest rate derivatives	10,620	180	39,803	(643)
Debt Hedging | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) related to interest rate derivatives	(246)	(966)	(8,386)	(1,958)
Debt Hedging | Term borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) related to term borrowings	$ 240	$ 941	$ 8,310	$ 1,870

Derivatives - Derivatives Ass_3

Derivatives - Derivatives Associated With Cash Flow Hedges (Details) - Cash Flow Hedges - Hedging Instruments And Hedged Items - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	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	$ 373	$ 942

Derivatives - Gains_(Losses) _2

Derivatives - Gains/(Losses) on Derivatives Associated with Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Loss expected to be reclassified to earnings in the next twelve months			$ 10,600
Cash Flow Hedges | Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Other comprehensive income/(loss)	$ (2,517)	$ (91)	(14,612)	$ 1,906
Gain/(loss) reclassified from AOCI into Interest income	771	(643)	1,079	(2,399)
Cash Flow Hedges | Hedging Instruments | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Other comprehensive income/(loss)	$ (2,257)	$ (1,190)	$ (17,788)	$ (800)

Derivatives - Assets And Collat

Derivatives - Assets And Collateral Received (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Gross amounts of recognized assets	$ 54,476	$ 81,634
Gross amounts not offset in the Statements of Condition
Derivative assets not subject to master netting agreements	20,100	10,200
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized assets	34,414	71,458
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	34,414	71,458
Gross amounts not offset in the Statements of Condition
Derivative liabilities available for offset	(8,590)	(17,278)
Collateral received	(25,156)	(51,271)
Net amount	$ 668	$ 2,909

Derivatives - Liabilities and C

Derivatives - Liabilities and Collateral Pledged (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 170,324	$ 85,061
Gross amounts not offset in the Statements of Condition
Derivative liabilities not subject to master netting agreements	53,100	15,200
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	117,241	69,842
Gross amounts offset in the Statements of Condition	0	0
Net amounts of liabilities presented in the Statements of Condition	117,241	69,842
Gross amounts not offset in the Statements of Condition
Derivative assets available for offset	(8,590)	(17,278)
Collateral pledged	(65,354)	(51,801)
Net amount	$ 43,297	$ 763

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	Sep. 30, 2018	Dec. 31, 2017
Offsetting [Abstract]
Gross amounts of recognized assets	$ 687,437	$ 725,609
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	687,437	725,609
Gross amounts not offset in the Statements of Condition
Offsetting securities sold under agreements to repurchase	(1,017)	(259)
Securities collateral (not recognized on FHN’s Statements of Condition)	(681,110)	(720,036)
Net amount	$ 5,310	$ 5,314

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	Sep. 30, 2018	Dec. 31, 2017
Offsetting [Abstract]
Gross amounts of recognized liabilities	$ 678,510	$ 656,602
Gross amounts offset in the Statements of Condition	0	0
Net amounts of liabilities presented in the Statements of Condition	678,510	656,602
Gross amounts not offset in the Statements of Condition
Offsetting securities purchased under agreements to resell	(1,017)	(259)
Securities/ government guaranteed loans collateral	(677,125)	(656,216)
Net amount	$ 368	$ 127

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	Sep. 30, 2018	Dec. 31, 2017
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	$ 678,510	$ 656,602
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	670,568	647,571
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	7,942	9,031
U.S. treasuries
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	17,555	13,830
U.S. treasuries | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	17,555	13,830
U.S. treasuries | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	0	0
Government agency issued MBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	319,760	430,186
Government agency issued MBS | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	314,231	424,821
Government agency issued MBS | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	5,529	5,365
Government agency issued CMO
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	51,966	57,703
Government agency issued CMO | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	49,553	54,037
Government agency issued CMO | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	2,413	3,666
Government guaranteed loans (SBA and USDA)
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	289,229	154,883
Government guaranteed loans (SBA and USDA) | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	289,229	154,883
Government guaranteed loans (SBA and USDA) | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total Securities sold under agreements to repurchase	$ 0	$ 0

Fair Value of Assets & Liabil_3

Fair Value of Assets & Liabilities - Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	$ 1,930,991	$ 1,416,345
Loans held-for-sale (elected fair value)	16,418	20,881
Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	16,418	20,881
Securities available-for-sale	4,608,383	4,931,402
Total other assets	117,529	121,456
Total assets	6,673,321	6,490,084
Total other liabilities	170,324	85,061
Total liabilities	910,018	723,576
Recurring | Deferred compensation mutual funds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	40,912	39,822
Recurring | Derivatives, forwards and futures
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	20,013	10,161
Total other liabilities	18,770	9,535
Recurring | Derivatives, interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	34,333	71,473
Total other liabilities	117,236	69,842
Recurring | Derivatives, other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	130
Total other liabilities	34,318	5,684
Recurring | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	98	99
Recurring | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	2,414,877	2,577,376
Recurring | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	1,991,184	2,269,858
Recurring | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	113,088
Recurring | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	23,701
Recurring | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	55,074	55,782
Recurring | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale		27,017
Total other assets	22,141
Recurring | Interest-only strips (elected fair value)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	10,361	1,270
Recurring | Trading securities—fixed income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,929,399	1,414,194
Total trading liabilities—fixed income	739,694	638,515
Recurring | Trading securities—fixed income | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	121,490	128,995
Total trading liabilities—fixed income	574,897	506,679
Recurring | Trading securities—fixed income | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	235,403	227,038
Recurring | Trading securities—fixed income | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	568,344	275,014
Recurring | Trading securities—fixed income | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	43,642	54,699
Recurring | Trading securities—fixed income | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	54,669	34,573
Total trading liabilities—fixed income	110
Recurring | Trading securities—fixed income | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	866,128	693,877
Total trading liabilities—fixed income	164,687	131,836
Recurring | Trading securities—fixed income | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	39,723	(2)
Recurring | Trading securities—mortgage banking
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,592	2,151
Recurring | Level 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	0	0
Securities available-for-sale	0	27,017
Total other assets	83,066	49,983
Total assets	83,066	77,000
Total other liabilities	18,770	9,535
Total liabilities	18,770	9,535
Recurring | Level 1 | Deferred compensation mutual funds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	40,912	39,822
Recurring | Level 1 | Derivatives, forwards and futures
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	20,013	10,161
Total other liabilities	18,770	9,535
Recurring | Level 1 | Derivatives, interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Recurring | Level 1 | Derivatives, other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0
Total other liabilities	0	0
Recurring | Level 1 | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 1 | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 1 | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 1 | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0
Recurring | Level 1 | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0
Recurring | Level 1 | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 1 | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale		27,017
Total other assets	22,141
Recurring | Level 1 | Interest-only strips (elected fair value)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 1 | Trading securities—fixed income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0	0
Recurring | Level 1 | Trading securities—fixed income | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0	0
Recurring | Level 1 | Trading securities—fixed income | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 1 | Trading securities—fixed income | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 1 | Trading securities—fixed income | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 1 | Trading securities—fixed income | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0
Recurring | Level 1 | Trading securities—fixed income | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0	0
Recurring | Level 1 | Trading securities—fixed income | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 1 | Trading securities—mortgage banking
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	182	1,955
Securities available-for-sale	4,598,022	4,903,115
Total other assets	34,463	71,473
Total assets	6,562,066	6,390,737
Total other liabilities	117,342	69,881
Total liabilities	857,036	708,396
Recurring | Level 2 | Deferred compensation mutual funds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Recurring | Level 2 | Derivatives, forwards and futures
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets		0
Total other liabilities	0	0
Recurring | Level 2 | Derivatives, interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	34,333	71,473
Total other liabilities	117,236	69,842
Recurring | Level 2 | Derivatives, other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	130
Total other liabilities	106	39
Recurring | Level 2 | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	98	99
Recurring | Level 2 | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	2,414,877	2,577,376
Recurring | Level 2 | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	1,991,184	2,269,858
Recurring | Level 2 | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	113,088
Recurring | Level 2 | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	23,701
Recurring | Level 2 | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	55,074	55,782
Recurring | Level 2 | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale		0
Total other assets	0
Recurring | Level 2 | Interest-only strips (elected fair value)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 2 | Trading securities—fixed income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,929,399	1,414,194
Total trading liabilities—fixed income	739,694	638,515
Recurring | Level 2 | Trading securities—fixed income | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	121,490	128,995
Total trading liabilities—fixed income	574,897	506,679
Recurring | Level 2 | Trading securities—fixed income | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	235,403	227,038
Recurring | Level 2 | Trading securities—fixed income | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	568,344	275,014
Recurring | Level 2 | Trading securities—fixed income | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	43,642	54,699
Recurring | Level 2 | Trading securities—fixed income | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	54,669	34,573
Total trading liabilities—fixed income	110
Recurring | Level 2 | Trading securities—fixed income | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	866,128	693,877
Total trading liabilities—fixed income	164,687	131,836
Recurring | Level 2 | Trading securities—fixed income | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	39,723	(2)
Recurring | Level 2 | Trading securities—mortgage banking
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	16,236	18,926
Securities available-for-sale	10,361	1,270
Total other assets	0	0
Total assets	28,189	22,347
Total other liabilities	34,212	5,645
Total liabilities	34,212	5,645
Recurring | Level 3 | Deferred compensation mutual funds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Recurring | Level 3 | Derivatives, forwards and futures
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Recurring | Level 3 | Derivatives, interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Recurring | Level 3 | Derivatives, other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0
Total other liabilities	34,212	5,645
Recurring | Level 3 | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 3 | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 3 | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 3 | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0
Recurring | Level 3 | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0
Recurring | Level 3 | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Recurring | Level 3 | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale		0
Total other assets	0
Recurring | Level 3 | Interest-only strips (elected fair value)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	10,361	1,270
Recurring | Level 3 | Trading securities—fixed income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0	0
Recurring | Level 3 | Trading securities—fixed income | U.S. treasuries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0	0
Recurring | Level 3 | Trading securities—fixed income | Government agency issued MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 3 | Trading securities—fixed income | Government agency issued CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 3 | Trading securities—fixed income | Other U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 3 | Trading securities—fixed income | States and municipalities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0
Recurring | Level 3 | Trading securities—fixed income | Corporates and other debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities—fixed income	0	0
Recurring | Level 3 | Trading securities—fixed income | Equity, mutual funds, and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Recurring | Level 3 | Trading securities—mortgage banking
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	$ 1,592	$ 2,151

Fair Value of Assets & Liabil_4

Fair Value of Assets & Liabilities - Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ (9,425)	$ (5,700)	$ (5,645)	$ (6,245)
Net income	(529)	(129)	(4,904)	(179)
Purchases	(28,100)	0	(28,100)	0
Sales	0		0	0
Settlements	3,842	299	4,437	894
Net transfers into/(out of) Level 3	0	0	0	0
Ending balance	(34,212)	(5,530)	(34,212)	(5,530)
Net unrealized gains/(losses) included in net income	(530)	(129)	(4,904)	(179)
Trading securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,724	2,464	2,151	2,573
Net income	33	92	173	380
Purchases	0	0	0	0
Sales	0		0	0
Settlements	(165)	(251)	(732)	(648)
Net transfers into/(out of) Level 3	0	0	0	0
Ending balance	1,592	2,305	1,592	2,305
Net unrealized gains/(losses) included in net income	(3)	62	59	264
Interest- only strips- AFS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5,787	1,163	1,270	0
Net income	(456)	(160)	840	107
Purchases	0	0	0	1,413
Sales	(2,034)		(11,227)	(3,291)
Settlements	0	0	0	0
Net transfers into/(out of) Level 3	7,064	2,120	19,478	4,894
Ending balance	10,361	3,123	10,361	3,123
Net unrealized gains/(losses) included in net income	(215)	(72)	(279)	(122)
Loans held- for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	16,718	20,587	18,926	21,924
Net income	277	390	986	1,722
Purchases	0	43	62	118
Sales	0		0	0
Settlements	(759)	(939)	(3,382)	(3,340)
Net transfers into/(out of) Level 3	0	0	(356)	(343)
Ending balance	16,236	20,081	16,236	20,081
Net unrealized gains/(losses) included in net income	$ 277	$ 390	$ 986	$ 1,722

Fair Value of Assets & Liabil_5

Fair Value of Assets & Liabilities - Nonrecurring Fair Value Measurements (Details) - USD ($) $ in Thousands		Sep. 30, 2018		Dec. 31, 2017		Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		$ 16,418		$ 20,881
Loans, net of unearned income		27,350,214	[1]	27,658,929	[1]	$ 20,166,091
OREO	[2]	28,628		43,382
Non Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		26,995		26,666
OREO		25,726		39,566
Other assets		23,329		26,521
Non Recurring | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		542		618
Non Recurring | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		619,160		466,977
Non Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		0		0
OREO		0		0
Other assets		0		0
Non Recurring | Level 1 | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		0		0
Non Recurring | Level 1 | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		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
OREO		0		0
Other assets		0		0
Non Recurring | Level 2 | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		0		0
Non Recurring | Level 2 | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		618,142		465,504
Non Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		26,995		26,666
OREO		25,726		39,566
Other assets		23,329		26,521
Non Recurring | Level 3 | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		542		618
Non Recurring | Level 3 | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		$ 1,018		$ 1,473
[1]	September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.
[2]	September 30, 2018 and December 31, 2017 include $11.0 million and $12.2 million, respectively, of foreclosed residential real estate.

Fair Value of Assets & Liabil_6

Fair Value of Assets & Liabilities - Gains/(losses) on Nonrecurring Fair Value Measurements (Details) - Non Recurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income	$ 363	$ (2,388)	$ 1,020	$ (1,456)
OREO	(776)	(41)	(2,198)	(662)
Other assets	(1,370)	(762)	(3,586)	(2,646)
Total	(2,993)	(3,271)	(7,221)	(6,001)
Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	3	6	7	22
Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ (1,213)	$ (86)	$ (2,464)	$ (1,259)

Fair Value of Assets & Liabil_7

Fair Value of Assets & Liabilities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Gain/(loss) on instrument specific credit risk	$ 0			$ 0.1	$ 0.3	$ 0.5
Corporate
Segment Reporting Information [Line Items]
Long-lived asset impairment	(0.7)	$ (1.3)	$ (3)	$ (2)
Reversed Asset Impairment Charges	$ 1
Regional Banking
Segment Reporting Information [Line Items]
Long-lived asset impairment			$ (0.8)

Fair Value of Assets & Liabil_8

Fair Value of Assets & Liabilities - Schedule Of Unobservable Inputs Utilized In Determining The Fair Value Of Level 3 Recurring And Non-Recurring Measurements (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 4,608,383	$ 5,170,255
Loans held-for-sale (elected fair value)	16,418	20,881
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	34,212	5,645
Loans, net of unearned income, fair value disclosure	26,995	26,666
OREO, fair value disclosure	25,726	39,566
Level 3 | Loans held- for-sale | Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)	16,778	19,544
Level 3 | Loans held-for-sale- unguaranteed interest in SBA loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)	1,018	1,473
Level 3 | Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets	23,329	26,521
Level 3 | Interest- only strips- AFS | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 10,361	$ 1,270
Constant prepayment rate | Level 3 | Discounted cash flow | Minimum | Loans held-for-sale- unguaranteed interest in SBA loans
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 | Level 3 | Discounted cash flow | Maximum | Loans held-for-sale- unguaranteed interest in SBA loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.12	0.12
Constant prepayment rate | Level 3 | Interest- only strips- AFS | Discounted cash flow | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, measurement input	0.11
Constant prepayment rate | Level 3 | Interest- only strips- AFS | Discounted cash flow | Minimum | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, measurement input		0.10
Constant prepayment rate | Level 3 | Interest- only strips- AFS | Discounted cash flow | Maximum | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, measurement input		0.11
Bond equivalent yield | Level 3 | Discounted cash flow | Loans held-for-sale- unguaranteed interest in SBA loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.09
Bond equivalent yield | Level 3 | Discounted cash flow | Minimum | Loans held-for-sale- unguaranteed interest in SBA loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input		0.09
Bond equivalent yield | Level 3 | Discounted cash flow | Maximum | Loans held-for-sale- unguaranteed interest in SBA loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input		0.10
Bond equivalent yield | Level 3 | Interest- only strips- AFS | Discounted cash flow | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, measurement input		0.17
Bond equivalent yield | Level 3 | Interest- only strips- AFS | Discounted cash flow | Minimum | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, measurement input	0.13
Bond equivalent yield | Level 3 | Interest- only strips- AFS | Discounted cash flow | Maximum | Available-for-sale- securities SBA-interest only strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, measurement input	0.18
Prepayment speeds - First mortgage | Level 3 | Discounted cash flow | Minimum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.02	0.02
Prepayment speeds - First mortgage | Level 3 | Discounted cash flow | Maximum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.11	0.12
Prepayment speeds - HELOC | Level 3 | Discounted cash flow | Minimum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.05	0.05
Prepayment speeds - HELOC | Level 3 | Discounted cash flow | Maximum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.12	0.12
Foreclosure losses | Level 3 | Discounted cash flow | Minimum | Loans held- for-sale
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 | Level 3 | Discounted cash flow | Maximum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.70	0.70
Loss severity trends - First mortgage | Level 3 | Discounted cash flow | Minimum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.02	0.05
Loss severity trends - First mortgage | Level 3 | Discounted cash flow | Maximum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.25	0.30
Loss severity trends - HELOC | Level 3 | Discounted cash flow | Minimum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	0.50	0.15
Loss severity trends - HELOC | Level 3 | Discounted cash flow | Maximum | Loans held- for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, measurement input	1	1
Visa covered litigation resolution amount | Level 3 | Discounted cash flow | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	$ 5,200,000	$ 4,400,000
Visa covered litigation resolution amount | Level 3 | Discounted cash flow | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	$ 5,800,000	$ 5,200,000
Probability of resolution scenarios | Level 3 | Discounted cash flow | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.20	0.10
Probability of resolution scenarios | Level 3 | Discounted cash flow | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.30	0.30
Time until resolution | Level 3 | Discounted cash flow | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, term	24 months	18 months
Time until resolution | Level 3 | Discounted cash flow | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, term	48 months	48 months
Marketability adjustments for specific properties | Level 3 | Appraisals from comparable properties | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0	0
Marketability adjustments for specific properties | Level 3 | Appraisals from comparable properties | Minimum | Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, fair value disclosure	0	0
Marketability adjustments for specific properties | Level 3 | Appraisals from comparable properties | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.10	0.10
Marketability adjustments for specific properties | Level 3 | Appraisals from comparable properties | Maximum | Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, fair value disclosure	0.25	0.25
Borrowing base certificates adjustment | Level 3 | Other collateral valuations | Minimum
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 | Level 3 | Other collateral valuations | Maximum
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 | Level 3 | Other collateral valuations | Minimum
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 | Level 3 | Other collateral valuations | Maximum
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 | Level 3 | Appraisals from comparable properties | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO, measurement input	0	0
Adjustment for value changes since appraisal | Level 3 | Appraisals from comparable properties | Maximum
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 | Level 3 | Discounted cash flow | Minimum | Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, fair value disclosure	0	0
Adjustments to current sales yields for specific properties | Level 3 | Discounted cash flow | Maximum | Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, fair value disclosure	0.15	0.15

Fair Value of Assets & Liabil_9

Fair Value of Assets & Liabilities - Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	$ 16,418	$ 20,881
Fair value carrying amount less aggregate unpaid principal - Total loans	(7,479)	(8,874)
Nonaccrual loans	4,483	5,783
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(3,877)	(5,098)
Loans 90 days or more past due and still accruing	0	0
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing	0	0
Aggregate unpaid principal
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	23,897	29,755
Nonaccrual loans	8,360	10,881
Loans 90 days or more past due and still accruing	$ 0	$ 0

Fair Value of Assets & Liabi_10

Fair Value of Assets & Liabilities - Changes In Fair Value Of Assets And Liabilities Which Fair Value Option Included In Current Period Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Mortgage Banking Noninterest Income | Loans Held-For-Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ 277	$ 390	$ 986	$ 1,722

Fair Value of Assets & Liabi_11

Fair Value of Assets & Liabilities - Summary Of Book Value And Estimated Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Assets:
Total loans, net of unearned income and allowance for loan losses		$ 27,164,255	$ 27,469,374
Short-term financial assets:
Interest-bearing cash		531,681	1,185,600
Federal funds sold		113,722	87,364
Securities purchased under agreements to resell		687,437	725,609
Trading securities		1,930,991	1,416,345
Loans held-for-sale	[1]	725,651	699,377
Securities available-for-sale		4,608,383	5,170,255
Securities held-to-maturity		10,000	10,000
Derivative assets		54,476	81,634
Nonearning assets:
Cash and due from banks		642,051	639,073
Fixed income receivables		177,802	68,693
Total assets		40,635,924	41,423,388
Deposits:
Total deposits		31,008,085	30,620,362
Trading liabilities		739,694	638,515
Short-term financial liabilities:
Federal funds purchased		437,474	399,820
Securities sold under agreements to repurchase		678,510	656,602
Other short-term borrowings		1,069,912	2,626,213
Term borrowings:
Term borrowings		1,200,134	1,218,097
Derivative liabilities		170,324	85,061
Other noninterest-bearing liabilities:
Fixed income payables		36,939	48,996
Total liabilities		35,893,993	36,842,900
Level 3 | FHLB-Cincinnati
Other noninterest-bearing liabilities:
Restricted investments		87,900	87,900
Level 3 | FRB Stock
Other noninterest-bearing liabilities:
Restricted investments		130,700	134,600
Book Value
Assets:
Total loans, net of unearned income and allowance for loan losses		27,164,255	27,469,374
Short-term financial assets:
Interest-bearing cash		531,681	1,185,600
Federal funds sold		113,722	87,364
Securities purchased under agreements to resell		687,437	725,609
Total short-term financial assets		1,332,840	1,998,573
Trading securities		1,930,991	1,416,345
Loans held-for-sale		725,651
Securities available-for-sale		4,608,383	5,170,255
Securities held-to-maturity		10,000	10,000
Derivative assets		54,476	81,634
Other assets:
Tax credit investments		139,983	119,317
Deferred compensation mutual funds		40,912	39,822
Equity, mutual funds, and other		240,667
Total other assets		421,562	159,139
Nonearning assets:
Cash and due from banks			639,073
Fixed income receivables			68,693
Accrued interest receivable			97,239
Accrued interest receivable			805,005
Total assets		36,248,158	37,809,702
Deposits:
Defined maturity			3,322,921
Undefined maturity			27,297,441
Total deposits		4,056,184	30,620,362
Trading liabilities		739,694	638,515
Short-term financial liabilities:
Federal funds purchased		437,474	399,820
Securities sold under agreements to repurchase		678,510	656,602
Other short-term borrowings		1,069,912	2,626,213
Total short-term financial liabilities		2,185,896	3,682,635
Term borrowings:
Real estate investment trust-preferred		46,151	46,100
Term borrowings—new market tax credit investment		18,000	18,000
Secured borrowings		16,621	18,642
Junior subordinated debentures		177,974	187,281
Term borrowings		941,388	948,074
Total term borrowings		1,200,134	1,218,097
Derivative liabilities			85,061
Other noninterest-bearing liabilities:
Fixed income payables			48,996
Accrued interest payable			16,270
Total other noninterest-bearing liabilities			65,266
Total liabilities		8,352,232	36,309,936
Book Value | Commercial, financial and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		15,943,831	15,959,062
Book Value | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		4,203,121	4,186,268
Book Value | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		6,164,646	6,330,384
Book Value | Permanent mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		333,574	383,742
Book Value | Credit card & other
Assets:
Total loans, net of unearned income and allowance for loan losses		519,083	609,918
Book Value | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held-for-sale		16,418	88,173
Book Value | USDA & SBA loans- LOCOM
Short-term financial assets:
Loans held-for-sale		619,160	466,977
Book Value | Other consumer loans- LOCOM
Short-term financial assets:
Loans held-for-sale		28,843	144,227
Book Value | Mortgage loans- LOCOM
Short-term financial assets:
Loans held-for-sale		61,230
Fair Value
Assets:
Total loans, net of unearned income and allowance for loan losses		27,112,576	27,523,017
Short-term financial assets:
Interest-bearing cash		531,681	1,185,600
Federal funds sold		113,722	87,364
Securities purchased under agreements to resell		687,437	725,609
Total short-term financial assets		1,332,840	1,998,573
Trading securities		1,930,991	1,416,345
Loans held-for-sale		731,377
Securities available-for-sale		4,608,383	5,170,255
Securities held-to-maturity		9,756	9,901
Derivative assets		54,476	81,634
Other assets:
Tax credit investments		136,984	112,292
Deferred compensation mutual funds		40,912	39,822
Equity, mutual funds, and other		240,667
Total other assets		418,563	152,114
Nonearning assets:
Cash and due from banks			639,073
Fixed income receivables			68,693
Accrued interest receivable			97,239
Accrued interest receivable			805,005
Total assets		36,198,962	37,857,981
Deposits:
Defined maturity			3,293,650
Undefined maturity			27,297,431
Total deposits		4,024,544	30,591,081
Trading liabilities		739,694	638,515
Short-term financial liabilities:
Federal funds purchased		437,474	399,820
Securities sold under agreements to repurchase		678,510	656,602
Other short-term borrowings		1,069,912	2,626,213
Total short-term financial liabilities		2,185,896	3,682,635
Term borrowings:
Real estate investment trust-preferred		47,470	48,880
Term borrowings—new market tax credit investment		17,915	17,930
Secured borrowings		16,499	18,305
Junior subordinated debentures		177,974	187,281
Term borrowings		957,647	966,292
Total term borrowings		1,217,505	1,238,688
Derivative liabilities		170,324	85,061
Other noninterest-bearing liabilities:
Fixed income payables			48,996
Accrued interest payable			16,270
Total other noninterest-bearing liabilities			65,266
Total liabilities		8,337,963	36,301,246
Loan commitments		2,871	2,617
Standby and other commitments		4,981	5,274
Fair Value | Commercial, financial and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		15,941,049	15,990,991
Fair Value | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		4,198,110	4,215,367
Fair Value | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		6,114,607	6,320,308
Fair Value | Permanent mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		338,736	388,396
Fair Value | Credit card & other
Assets:
Total loans, net of unearned income and allowance for loan losses		520,074	607,955
Fair Value | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held-for-sale		16,418	88,173
Fair Value | USDA & SBA loans- LOCOM
Short-term financial assets:
Loans held-for-sale		624,886	468,737
Fair Value | Other consumer loans- LOCOM
Short-term financial assets:
Loans held-for-sale		28,843	144,227
Fair Value | Mortgage loans- LOCOM
Short-term financial assets:
Loans held-for-sale		61,230
Fair Value | Level 1
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Short-term financial assets:
Interest-bearing cash		531,681	1,185,600
Federal funds sold		0	0
Securities purchased under agreements to resell		0	0
Total short-term financial assets		531,681	1,185,600
Trading securities		0	0
Loans held-for-sale		0
Securities available-for-sale		0	27,017
Securities held-to-maturity		0	0
Derivative assets		20,013	10,161
Other assets:
Tax credit investments		0	0
Deferred compensation mutual funds		40,912	39,822
Equity, mutual funds, and other		22,141
Total other assets		63,053	39,822
Nonearning assets:
Cash and due from banks			639,073
Fixed income receivables			0
Accrued interest receivable			0
Accrued interest receivable			639,073
Total assets		614,747	1,901,673
Deposits:
Defined maturity			0
Undefined maturity			0
Total deposits		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	0
Secured borrowings		0	0
Junior subordinated debentures		0	0
Term borrowings		0	0
Total term borrowings		0	0
Derivative liabilities		18,770	9,535
Other noninterest-bearing liabilities:
Fixed income payables			0
Accrued interest payable			0
Total other noninterest-bearing liabilities			0
Total liabilities		18,770	9,535
Fair Value | Level 1 | Commercial, financial and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 1 | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 1 | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 1 | Permanent mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 1 | Credit card & other
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 1 | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held-for-sale		0	0
Fair Value | Level 1 | USDA & SBA loans- LOCOM
Short-term financial assets:
Loans held-for-sale		0	0
Fair Value | Level 1 | Other consumer loans- LOCOM
Short-term financial assets:
Loans held-for-sale		0	0
Fair Value | Level 1 | Mortgage loans- LOCOM
Short-term financial assets:
Loans held-for-sale		0
Fair Value | 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		113,722	87,364
Securities purchased under agreements to resell		687,437	725,609
Total short-term financial assets		801,159	812,973
Trading securities		1,929,399	1,414,194
Loans held-for-sale		630,749
Securities available-for-sale		4,598,022	4,903,115
Securities held-to-maturity		0	0
Derivative assets		34,463	71,473
Other assets:
Tax credit investments		0	0
Deferred compensation mutual funds		0	0
Equity, mutual funds, and other		0
Total other assets		0	0
Nonearning assets:
Cash and due from banks			0
Fixed income receivables			68,693
Accrued interest receivable			97,239
Accrued interest receivable			165,932
Total assets		7,993,792	7,851,781
Deposits:
Defined maturity			3,293,650
Undefined maturity			27,297,431
Total deposits		4,024,544	30,591,081
Trading liabilities		739,694	638,515
Short-term financial liabilities:
Federal funds purchased		437,474	399,820
Securities sold under agreements to repurchase		678,510	656,602
Other short-term borrowings		1,069,912	2,626,213
Total short-term financial liabilities		2,185,896	3,682,635
Term borrowings:
Real estate investment trust-preferred		0	0
Term borrowings—new market tax credit investment		0	0
Secured borrowings		0	0
Junior subordinated debentures		0	0
Term borrowings		957,647	966,292
Total term borrowings		957,647	966,292
Derivative liabilities		117,342	69,881
Other noninterest-bearing liabilities:
Fixed income payables			48,996
Accrued interest payable			16,270
Total other noninterest-bearing liabilities			65,266
Total liabilities		8,025,123	36,013,670
Fair Value | Level 2 | Commercial, financial and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 2 | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 2 | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 2 | Permanent mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 2 | Credit card & other
Assets:
Total loans, net of unearned income and allowance for loan losses		0	0
Fair Value | Level 2 | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held-for-sale		182	6,902
Fair Value | Level 2 | USDA & SBA loans- LOCOM
Short-term financial assets:
Loans held-for-sale		623,863	467,227
Fair Value | Level 2 | Other consumer loans- LOCOM
Short-term financial assets:
Loans held-for-sale		6,704	9,965
Fair Value | Level 2 | Mortgage loans- LOCOM
Short-term financial assets:
Loans held-for-sale		0
Fair Value | Level 3
Assets:
Total loans, net of unearned income and allowance for loan losses		27,112,576	27,523,017
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		1,592	2,151
Loans held-for-sale		100,628
Securities available-for-sale		10,361	240,123
Securities held-to-maturity		9,756	9,901
Derivative assets		0	0
Other assets:
Tax credit investments		136,984	112,292
Deferred compensation mutual funds		0	0
Equity, mutual funds, and other		218,526
Total other assets		355,510	112,292
Nonearning assets:
Cash and due from banks			0
Fixed income receivables			0
Accrued interest receivable			0
Accrued interest receivable			0
Total assets		27,590,423	28,104,527
Deposits:
Defined maturity			0
Undefined maturity			0
Total deposits		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		47,470	48,880
Term borrowings—new market tax credit investment		17,915	17,930
Secured borrowings		16,499	18,305
Junior subordinated debentures		177,974	187,281
Term borrowings		0	0
Total term borrowings		259,858	272,396
Derivative liabilities		34,212	5,645
Other noninterest-bearing liabilities:
Fixed income payables			0
Accrued interest payable			0
Total other noninterest-bearing liabilities			0
Total liabilities		294,070	278,041
Fair Value | Level 3 | Commercial, financial and industrial
Assets:
Total loans, net of unearned income and allowance for loan losses		15,941,049	15,990,991
Fair Value | Level 3 | Commercial real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		4,198,110	4,215,367
Fair Value | Level 3 | Consumer real estate
Assets:
Total loans, net of unearned income and allowance for loan losses		6,114,607	6,320,308
Fair Value | Level 3 | Permanent mortgage
Assets:
Total loans, net of unearned income and allowance for loan losses		338,736	388,396
Fair Value | Level 3 | Credit card & other
Assets:
Total loans, net of unearned income and allowance for loan losses		520,074	607,955
Fair Value | Level 3 | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held-for-sale		16,236	81,271
Fair Value | Level 3 | USDA & SBA loans- LOCOM
Short-term financial assets:
Loans held-for-sale		1,023	1,510
Fair Value | Level 3 | Other consumer loans- LOCOM
Short-term financial assets:
Loans held-for-sale		22,139	134,262
Fair Value | Level 3 | Mortgage loans- LOCOM
Short-term financial assets:
Loans held-for-sale		61,230
Contractual Amount
Other noninterest-bearing liabilities:
Loan commitments		10,829,303	10,678,485
Standby and other commitments		$ 450,745	$ 420,728
[1]	September 30, 2018 and December 31, 2017 include $9.2 million and $11.7 million, respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.