First Horizon (FHN) 10-Q 5 Nov 20 2020 Q3 Quarterly report Financial data

Cover

Cover	9 Months Ended
	Sep. 30, 2020shares
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-15185
Entity Registrant Name	First Horizon National Corporation
Entity Incorporation, State or Country Code	TN
Entity Tax Identification Number	62-0803242
Entity Address, Address Line One	165 Madison Avenue
Entity Address, City or Town	Memphis,
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	38103
City Area Code	901
Local Phone Number	523-4444
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)	554,787,728
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000036966
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Capital Stock
Entity Information [Line Items]
Title of 12(b) Security	$.625 Par Value Common Capital Stock
Trading Symbol	FHN
Security Exchange Name	NYSE
Series A Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/4,000th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol	FHN PR A
Security Exchange Name	NYSE
Series B Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/400th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series B
Trading Symbol	FHN PR B
Security Exchange Name	NYSE
Series C Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/400th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series C
Trading Symbol	FHN PR C
Security Exchange Name	NYSE
Series D Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/400th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series D
Trading Symbol	FHN PR D
Security Exchange Name	NYSE
Series E Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/4,000th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol	FHN PR E
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 1,074,646	$ 633,728
Interest-bearing deposits with banks	5,443,292	482,405
Federal funds sold and securities purchased under agreements to resell	593,467	633,165
Trading securities	1,386,069	1,346,207
Securities available for sale at fair value	7,995,872	4,445,403
Loans held for sale (including $371,831 and $14,033 at fair value, respectively)	1,050,504	593,790
Loans and leases (including $12,372 and $— at fair value, respectively)	59,706,531	31,061,111
Allowance for loan and lease losses	(988,102)	(200,307)
Net loans and leases	58,718,429	30,860,804
Premises and equipment	756,113	455,006
Goodwill	1,510,431	1,432,787
Other intangible assets	365,700	130,200
Other assets	4,135,056	2,297,405
Total assets	83,029,579	43,310,900
Liabilities
Noninterest-bearing deposits	21,384,379	8,428,951
Interest-bearing deposits	47,024,528	24,000,584
Total deposits	68,408,907	32,429,535
Trading liabilities	477,073	505,581
Short-term borrowings	2,141,719	3,518,314
Term borrowings	2,161,870	791,368
Other liabilities	1,695,868	990,094
Total liabilities	74,885,437	38,234,892
Equity
Preferred stock, Non-cumulative perpetual, no par value; authorized 5,000,000 shares; issued 26,250 and 1,000 shares, respectively	470,370	95,624
Common stock, $0.625 par value; authorized 700,000,000 and 400,000,000 shares, respectively; issued 554,787,728 and 311,469,056 shares, respectively	346,742	194,668
Capital surplus	5,061,079	2,931,451
Retained earnings	2,110,990	1,798,442
Accumulated other comprehensive loss, net	(140,470)	(239,608)
FHN shareholders' equity	7,848,711	4,780,577
Noncontrolling interest	295,431	295,431
Total equity	8,144,142	4,979,951
Total liabilities and equity	$ 83,029,579	43,310,900
Previously Reported
Equity
Total equity		$ 5,076,008

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Loans held-for-sale, at fair value	$ 371,831	$ 14,033
Loans held for investment, at fair value	$ 12,372	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	26,250	1,000
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	700,000,000	400,000,000
Common stock, shares issued (in shares)	554,787,728	311,469,056

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income
Interest and fees on loans and leases	$ 557,195	$ 356,371	$ 1,189,707	$ 1,040,421
Interest and fees on loans held for sale	8,284	6,069	21,779	24,074
Taxable	24,113	28,418	75,846	90,935
Tax-exempt	1,421	352	2,421	925
Interest on trading securities	6,177	10,512	28,017	37,214
Interest on other earning assets	1,021	5,772	5,433	26,629
Total interest income	598,211	407,494	1,323,203	1,220,198
Interest expense
Interest on deposits	42,293	78,591	121,527	239,803
Interest on trading liabilities	699	2,943	4,965	9,515
Interest on short-term borrowings	1,259	11,532	12,578	29,314
Interest on term borrowings	21,595	13,752	43,622	42,772
Total interest expense	65,846	106,818	182,692	321,404
Net interest income	532,365	300,676	1,140,511	898,794
Provision for credit losses	227,000	14,366	502,388	36,273
Net interest income after provision for credit losses	305,365	286,310	638,123	862,521
Noninterest income
Fixed income	110,943	77,645	318,999	197,808
Deposit transactions and cash management	42,056	34,379	103,133	98,374
Mortgage banking and title income	65,503	2,019	72,072	6,477
Brokerage, management fees and commissions	17,891	14,157	47,096	40,910
Trust services and investment management	11,741	7,163	26,669	22,077
Bankcard income	10,457	7,017	24,362	20,324
Securities gains (losses), net	(1,170)	97	(2,638)	177
Purchase accounting gain	532,150	0	532,150	0
Other income	33,352	29,258	82,105	84,626
Total noninterest income	822,923	171,735	1,203,948	470,773
Noninterest expense
Personnel expense	329,439	167,022	713,168	516,590
Net occupancy expense	39,098	18,887	80,106	60,299
Legal and professional fees	43,236	19,764	64,863	52,671
Computer software	25,512	15,191	58,061	45,331
Operations services	15,634	11,634	38,980	34,835
Contributions	39,339	167	39,811	408
Equipment expense	12,022	8,197	28,958	25,401
Amortization of intangible assets	14,629	6,206	25,221	18,628
Other expense	68,131	61,238	160,971	150,720
Total noninterest expense	587,040	308,306	1,210,139	904,883
Income before income taxes	541,248	149,739	631,932	428,411
Provision for income taxes	2,210	35,796	19,757	97,321
Net income	539,038	113,943	612,175	331,090
Net income attributable to noncontrolling interest	2,977	2,883	8,680	8,555
Net income attributable to controlling interest	536,061	111,060	603,495	322,535
Preferred stock dividends	12,722	1,550	15,822	4,650
Net income available to common shareholders	$ 523,339	$ 109,510	$ 587,673	$ 317,885
Basic earnings per share (in dollars per share)	$ 0.95	$ 0.35	$ 1.50	$ 1.01
Diluted earnings per share (in dollars per share)	$ 0.95	$ 0.35	$ 1.50	$ 1
Weighted average common shares (in shares)	549,690	311,888	391,699	314,442
Diluted average common shares (in shares)	550,846	313,805	392,713	316,401

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statements of Comprehensive Income/(loss)
Net income	$ 539,038	$ 113,943	$ 612,175	$ 331,090
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	(5,118)	16,889	82,130	113,696
Net unrealized gains (losses) on cash flow hedges	(2,933)	2,844	10,145	17,140
Net unrealized gains (losses) on pension and other postretirement plans	2,379	2,102	6,863	5,126
Other comprehensive income (loss)	(5,672)	21,835	99,138	135,962
Comprehensive income (loss)	533,366	135,778	711,313	467,052
Comprehensive income attributable to noncontrolling interest	2,977	2,883	8,680	8,555
Comprehensive income attributable to controlling interest	530,389	132,895	702,633	458,497
Income tax expense (benefit) of items included in Other comprehensive income:
Net unrealized gains (losses) on securities available for sale	(2,253)	5,544	26,198	37,321
Net unrealized gains (losses) on cash flow hedges	(771)	934	3,494	5,626
Net unrealized gains (losses) on pension and other postretirement plans	$ 2,208	$ 690	$ 3,670	$ 1,683

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Previously Reported	Revision of Prior Period, Accounting Standards Update, Adjustment	Preferred Stock	Preferred StockPreviously Reported	Common Stock		Common StockPreviously Reported	Capital Surplus		Capital SurplusPreviously Reported	Retained Earnings	Retained EarningsPreviously Reported	Retained EarningsRevision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Other Comprehensive Income/(Loss)		Accumulated Other Comprehensive Income/(Loss)Previously Reported		Noncontrolling Interest	Noncontrolling InterestPreviously Reported
Balance, beginning of period (in shares) at Dec. 31, 2018					1,000	1,000	318,573		318,573
Balance, beginning of period at Dec. 31, 2018		$ 4,784,369	$ 4,785,380	$ (1,011)	$ 95,624	$ 95,624	$ 199,108		$ 199,108	$ 3,029,425		$ 3,029,425	$ 1,541,397	$ 1,542,408	$ (1,011)	$ (376,616)	[1]	$ (376,616)	[1]	$ 295,431	$ 295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		103,405											100,585							2,820
Other comprehensive income (loss)		55,465														55,465	[1]
Comprehensive income (loss)		158,870											100,585			55,465	[1]			2,820
Cash dividends declared:
Preferred stock		(1,550)											(1,550)
Common stock		(44,864)											(44,864)
Common stock repurchased (in shares)							(3,594)
Common stock repurchased		(53,436)					$ (2,246)	[2]		(51,190)	[2]
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)							382
Stock options and restricted stock - equity awards		520					$ 239			281
Stock-based compensation expense		5,432								5,432
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,820)																		(2,820)
Balance, ending of period (in shares) at Mar. 31, 2019					1,000		315,361
Balance, end of period at Mar. 31, 2019		4,846,521			$ 95,624		$ 197,101			2,983,948			1,595,568			(321,151)	[1]			295,431
Balance, beginning of period (in shares) at Dec. 31, 2018					1,000	1,000	318,573		318,573
Balance, beginning of period at Dec. 31, 2018		4,784,369	4,785,380	(1,011)	$ 95,624	$ 95,624	$ 199,108		$ 199,108	3,029,425		3,029,425	1,541,397	1,542,408	(1,011)	(376,616)	[1]	(376,616)	[1]	295,431	295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		331,090
Other comprehensive income (loss)		135,962
Comprehensive income (loss)		467,052
Cash dividends declared:
Preferred stock		(4,650)
Balance, ending of period (in shares) at Sep. 30, 2019					1,000		311,180
Balance, end of period at Sep. 30, 2019		4,996,043			$ 95,624		$ 194,487			2,925,309			1,725,846			(240,654)				295,431
Balance, beginning of period (in shares) at Mar. 31, 2019					1,000		315,361
Balance, beginning of period at Mar. 31, 2019		4,846,521			$ 95,624		$ 197,101			2,983,948			1,595,568			(321,151)	[1]			295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		113,742											110,890							2,852
Other comprehensive income (loss)		58,662														58,662	[2],[3]
Comprehensive income (loss)		172,404											110,890			58,662	[2],[3]			2,852
Cash dividends declared:
Preferred stock		(1,550)											(1,550)
Common stock		(44,388)											(44,388)
Common stock repurchased (in shares)	[2]						(3,654)
Common stock repurchased	[2]	(52,222)					$ (2,284)			(49,938)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)							771
Stock options and restricted stock - equity awards		2,944					$ 482			2,462
Stock-based compensation expense		5,224								5,224
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,852)																		(2,852)
Balance, ending of period (in shares) at Jun. 30, 2019					1,000		312,478
Balance, end of period at Jun. 30, 2019		4,926,081			$ 95,624		$ 195,299			2,941,696			1,660,520			(262,489)	[1]			295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		113,943											111,060							2,883
Other comprehensive income (loss)		21,835														21,835
Comprehensive income (loss)		135,778											111,060			21,835				2,883
Cash dividends declared:
Preferred stock		(1,550)											(1,550)
Common stock		(44,184)											(44,184)
Common stock repurchased (in shares)							(1,804)
Common stock repurchased		(28,382)					$ (1,127)			(27,255)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)							506
Stock options and restricted stock - equity awards		5,361					$ 315			5,046
Stock-based compensation expense		5,822								5,822
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,883)																		(2,883)
Balance, ending of period (in shares) at Sep. 30, 2019					1,000		311,180
Balance, end of period at Sep. 30, 2019		4,996,043			$ 95,624		$ 194,487			2,925,309			1,725,846			(240,654)				295,431
Balance, beginning of period (in shares) at Dec. 31, 2019					1,000	1,000	311,469		311,469
Balance, beginning of period at Dec. 31, 2019		4,979,951	5,076,008	(96,057)	$ 95,624	$ 95,624	$ 194,668		$ 194,668	2,931,451		2,931,451	1,702,385	1,798,442	(96,057)	(239,608)	[3]	(239,608)	[3]	295,431	295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		16,472											13,620							2,852
Other comprehensive income (loss)		103,444														103,444	[3]
Comprehensive income (loss)		119,916											13,620			103,444	[3]			2,852
Cash dividends declared:
Preferred stock		(1,550)											(1,550)
Common stock		(47,350)											(47,350)
Common stock repurchased (in shares)							(141)
Common stock repurchased		(2,064)					$ (88)			(1,976)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)							652
Stock options and restricted stock - equity awards		4,140					$ 407			3,733
Stock-based compensation expense		7,281								7,281
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,852)																		(2,852)
Other (in shares)	[4]						(117)
Other	[4]	(1,892)					$ (73)			(1,819)
Balance, ending of period (in shares) at Mar. 31, 2020					1,000		311,863
Balance, end of period at Mar. 31, 2020		5,055,580			$ 95,624		$ 194,914			2,938,670			1,667,105			(136,164)	[3]			295,431
Balance, beginning of period (in shares) at Dec. 31, 2019					1,000	1,000	311,469		311,469
Balance, beginning of period at Dec. 31, 2019		4,979,951	$ 5,076,008	$ (96,057)	$ 95,624	$ 95,624	$ 194,668		$ 194,668	2,931,451		$ 2,931,451	1,702,385	$ 1,798,442	$ (96,057)	(239,608)	[3]	$ (239,608)	[3]	295,431	$ 295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		612,175
Other comprehensive income (loss)		99,138
Comprehensive income (loss)		711,313
Cash dividends declared:
Preferred stock		(15,822)
Balance, ending of period (in shares) at Sep. 30, 2020					26,250		554,788
Balance, end of period at Sep. 30, 2020		8,144,142			$ 470,370		$ 346,742			5,061,079			2,110,990			(140,470)				295,431
Balance, beginning of period (in shares) at Mar. 31, 2020					1,000		311,863
Balance, beginning of period at Mar. 31, 2020		5,055,580			$ 95,624		$ 194,914			2,938,670			1,667,105			(136,164)	[3]			295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		56,665											53,814							2,851
Other comprehensive income (loss)		1,366														1,366	[3]
Comprehensive income (loss)		58,031											53,814			1,366	[3]			2,851
Cash dividends declared:
Preferred stock		(1,550)											(1,550)
Common stock		(47,740)											(47,740)
Preferred stock issuance (in shares) (1,500 shares issued at $100,000 per share net of offering costs)					1,500
Preferred stock issuance (1,500 shares issued at $100,000 per share net of offering costs)		144,665			$ 144,665
Common stock repurchased (in shares)							(183)
Common stock repurchased		(1,468)					$ (114)			(1,354)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)							679
Stock options and restricted stock - equity awards							$ 424			(424)
Stock-based compensation expense		3,718								3,718
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,851)																		(2,851)
Balance, ending of period (in shares) at Jun. 30, 2020					2,500		312,359
Balance, end of period at Jun. 30, 2020		5,208,385			$ 240,289		$ 195,224			2,940,610			1,671,629			(134,798)	[3]			295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		539,038											536,061							2,977
Other comprehensive income (loss)		(5,672)														(5,672)
Comprehensive income (loss)		533,366											536,061			(5,672)				2,977
Cash dividends declared:
Preferred stock		(12,722)											(12,722)
Common stock		(84,095)											(84,095)
Common stock repurchased (in shares)							(88)
Common stock repurchased		(837)					$ (56)			(781)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)							138
Stock options and restricted stock - equity awards							$ 87			(87)
Issued in business combination (in shares)					23,750		243,015
Issued in business combination		2,497,296			$ 230,081		$ 151,885			2,115,330
Stock-based compensation expense		11,588								11,588
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,977)																		(2,977)
Other (in shares)							(636)
Other		(5,862)					$ (398)			(5,581)			117
Balance, ending of period (in shares) at Sep. 30, 2020					26,250		554,788
Balance, end of period at Sep. 30, 2020		$ 8,144,142			$ 470,370		$ 346,742			$ 5,061,079			$ 2,110,990			$ (140,470)				$ 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]	Includes $51.5 million, $50.2 million, and $28.2 million repurchased under share repurchase programs in first, second and third quarter 2019, respectively.
[3]	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.(b)
[4]	Represents shares canceled in connection with the resolution of remaining Capital Bank Financial Corporation ("CBF") dissenters' appraisal process.(c) Represents shares canceled to cover taxes on the IBKC equity compensation grants that automatically vested as part of the merger.

CONSOLIDATED CONDENSED STATEMEN

CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended						12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Preferred stock - cash dividends declared per share (in dollars per share)		$ 1,550	$ 1,550	$ 1,550	$ 1,550	$ 1,550
Common stock - cash dividends declared per share (in dollars per share)	$ 0.15	$ 0.15	$ 0.15	$ 0.14	$ 0.14	$ 0.14
Accounting Standards Update [Extensible List]							us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
First Horizon Share Repurchase Program
Common stock repurchased under share repurchase program				$ 28.2	$ 50.2	$ 51.5
Preferred Stock
Number of shares issued in transaction (in shares)		1,500
Preferred stock issuance, net of offering cost (in dollars per share)		$ 100,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net income	$ 612,175	$ 331,090
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	502,388	36,273
Provision (benefit) for deferred income taxes	(82,444)	69,102
Depreciation and amortization of premises and equipment	36,818	33,142
Amortization of intangible assets	25,221	18,628
Net other amortization and accretion	(18,048)	1,632
Net (increase) decrease in derivatives	(325,430)	(183,852)
Purchase accounting gain	(532,150)	0
Stock-based compensation expense	22,587	16,478
Securities (gains) losses, net	2,638	(177)
Net (gains) losses on sale/disposal of fixed assets	7,194	20,453
(Gain) loss on BOLI	(4,076)	0
Loans held for sale:
Purchases and originations	(2,780,401)	(1,488,577)
Gross proceeds from settlements and sales	1,577,599	581,137
(Gain) loss due to fair value adjustments and other	(42,781)	(6,468)
Other operating activities, net	725,813	1,287,711
Total adjustments	(885,072)	385,482
Net cash provided by (used in) operating activities	(272,897)	716,572
Investing Activities
Proceeds from sales of securities available for sale	249,404	182,824
Proceeds from maturities of securities available for sale	2,993,036	566,803
Purchases of securities available for sale	(3,166,074)	(357,182)
Proceeds from sales of premises and equipment	8,649	14,370
Purchases of premises and equipment	(35,293)	(28,769)
Proceeds from sale and pay down of loans classified as held to maturity	0	20,100
Proceeds from BOLI	8,228	10,085
Net increase in loans and leases	(2,309,625)	(3,779,972)
Net (increase) decrease in interest-bearing deposit with banks	(3,012,954)	913,199
Cash received for acquisitions, net	1,805,546	0
Other investing activities, net	10,445	13,296
Net cash used in investing activities	(3,448,638)	(2,445,246)
Common stock:
Stock options exercised	4,145	8,793
Cash dividends paid	(138,942)	(127,455)
Repurchase of shares	(4,295)	(134,041)
Cancellation of common shares	(7,754)	0
Preferred stock issuance	144,665	0
Cash dividends paid - preferred stock - noncontrolling interest	(8,586)	(8,555)
Cash dividends paid - preferred stock	(8,249)	(4,650)
Net increase (decrease) in deposits	5,561,114	(738,333)
Net increase (decrease) in short-term borrowings	(1,585,328)	2,814,279
Proceeds from Issuance of Other Long-term Debt	1,241,534	0
Repayments of Other Long-term Debt	(1,070,122)	(2,581)
Proceeds from (Repayments of) Secured Debt	(5,427)	11,572
Net cash provided by financing activities	4,122,755	1,819,029
Net increase in cash and cash equivalents	401,220	90,355
Cash and cash equivalents at beginning of period	1,266,893	1,405,325
Cash and cash equivalents at end of period	1,668,113	1,495,680
Supplemental Disclosures
Total interest paid	181,454	303,180
Total taxes paid	89,623	32,811
Total taxes refunded	543	27,742
Transfer from loans to OREO	1,987	6,309
Transfer from loans HFS to trading securities	1,083,418	1,024,274
Transfer from loans to loans HFS	$ 4,283	$ 31,465

Financial Information

Financial Information	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Information	Financial Information Basis of Accounting. The unaudited interim consolidated financial statements of First Horizon National Corporation (“FHN”), including its subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America and follow general practices within the industries in which it operates. This preparation requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates and assumptions are based on information available as of the date of the financial statements and could differ from actual results. 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 2020 period are not necessarily indicative of the results that may be expected in future periods. For further information, refer to the audited consolidated financial statements in Item 8 to FHN’s Annual Report on Form 10-K for the year ended December 31, 2019. Merger with IBERIABANK Corporation. On July 1, 2020, FHN and IBERIABANK Corporation ("IBKC") closed their merger-of-equals transaction (the "IBKC merger"). Historical periods prior to the closing of the merger only reflect results of legacy FHN operations. Subsequent to closing, results reflect all post-acquisition activity. Refer to Note 2– Acquisitions and Divestitures for additional information regarding the transaction. Reclassifications. In connection with the IBKC merger, certain captions in the Consolidated Balance Sheets and Consolidated Statements of Income and loan categories were realigned. Amounts reported in prior periods' consolidated financial statements, which represent FHN's pre-merger financial results, have been reclassified to conform to the current presentation. 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. As a result of the IBKC merger on July 1, 2020, mortgage banking and title income has become a more significant revenue source. Mortgage banking and title income includes mortgage servicing income, title income, mortgage loan originations and sales, derivative settlements, as well as any changes in fair value recorded on mortgage loans and derivatives. See Note 1– Summary of Significant Accounting Policies in the Notes to Consolidated Financial Statements on Form 10-K for the year ended December 31, 2019, for discussion of FHN's other key revenues. Contract Balances. As of September 30, 2020, accounts receivable related to products and services on noninterest income were $8.8 million. For the three and nine months ended September 30, 2020, FHN had no material impairment losses on noninterest accounts receivable and there were no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Balance Sheets as of September 30, 2020. Credit risk is assessed on these accounts receivable each reporting period and the amount of estimated uncollectible receivables is not material. Transaction Price Allocated to Remaining Performance Obligations. For the three and nine months ended September 30, 2020, 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 13 – Business Segment Information for a reconciliation of disaggregated revenue by major product line and reportable segment. Debt Investment Securities. Debt securities that may be sold prior to maturity are classified as available-for-sale (“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 Consolidated Statements of Comprehensive Income. Debt securities which management has the intent and ability to hold to maturity (“HTM”) are reported at amortized cost. Interest-only strips that are classified as securities AFS are valued at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for additional information. Realized gains and losses (i.e., from sales) for debt investment securities are determined by the specific identification method and reported in noninterest income. In periods subsequent to 2019, the evaluation of credit risk for HTM debt securities mirrors the process described below for loans held-for-investment. AFS debt securities are reviewed for potential credit impairment at the individual security level. The evaluation of credit risk includes consideration of third-party and government guarantees (both explicit and implicit), senior or subordinated status, credit ratings of the issuer, the effects of interest rate changes since purchase and observable market information such as issuer-specific credit spreads. Credit losses for AFS debt securities are generally recognized through establishment of an allowance for credit losses that cannot exceed the amount by which amortized cost exceeds fair value. Charge-offs are recorded as reductions of the security’s amortized cost and the credit allowance. Subsequent improvements in estimated credit losses result in reduction of the credit allowance, but not beyond zero. However, if FHN has the intent to sell or if it is more-likely-than-not that it will be compelled to sell a security with an unrecognized loss, the difference between the security's carrying value and fair value is recognized through earnings and a new amortized cost basis is established for the security (i.e., no allowance for credit losses is recognized). FHN has elected to exclude accrued interest receivable (“AIR”) from the fair value and amortized cost basis on AFS debt securities when assessing whether these securities have experienced credit impairment. Additionally, FHN has elected to not measure an allowance for credit losses on AIR for AFS debt securities based on its policy to write off uncollectible interest in a timely manner, which generally occurs when delinquency reaches no more than 90 days for all security types. Any such write offs are recognized as a reduction of interest income. AIR for AFS debt securities is included within Other assets in the Consolidated Balance Sheet. In periods prior to 2020, both AFS and HTM securities were reviewed quarterly for possible other-than-temporary impairment (“OTTI”). The review included an analysis of the facts and circumstances of each individual investment such as the degree of loss, the length of time the fair value had 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. Declines in value judged to be other-than-temporary (“OTTI”) based on FHN’s analysis of the facts and circumstances related to an individual investment, including securities that FHN had the intent to sell, were determined by the specific identification method. For HTM debt securities, OTTI recognized was typically credit-related and was reported in noninterest income. For impaired AFS debt securities that FHN did not intend to sell and was not required to sell prior to recovery but for which credit losses existed, the OTTI recognized was allocated between the total impairment related to credit losses which was reported in noninterest income, and the impairment related to all other factors which was excluded from earnings and reported, net of tax, as a component of other comprehensive income within shareholders’ equity and the Consolidated Statements of Comprehensive Income. Fed Funds Sold and Purchased. Fed funds sold and purchased represent unsecured overnight funding arrangements between participants in the Federal Reserve system primarily to assist banks in meeting their regulatory cash reserve requirements. Fed Funds sold are evaluated for credit risk each reporting period. Due to the short duration of each transaction and the history of no credit losses, no credit loss has been recognized. Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase. FHN purchases short-term securities under agreements to resell which are accounted for as collateralized financings except where FHN does not have an agreement to sell the same or substantially the same securities before maturity at a fixed or determinable price. All of FHN’s securities purchased under agreements to resell are recognized as collateralized financings. Securities delivered under these transactions are delivered to either the dealer custody account at the FRB or to the applicable counterparty. Securities sold under agreements to repurchase are offered to cash management customers as an automated, collateralized investment account. Securities sold under agreements to repurchase are also used by the consumer/commercial bank to obtain favorable borrowing rates on its purchased funds. All of FHN's securities sold under agreements to repurchase are secured borrowings. Collateral is valued daily and FHN may require counterparties to deposit additional securities or cash as collateral, or FHN may return cash or securities previously pledged by counterparties, or FHN may be required to post additional securities or cash as collateral, based on the contractual requirements for these transactions. FHN’s fixed income business utilizes securities borrowing arrangements as part of its trading operations. Securities borrowing transactions generally require FHN to deposit cash with the securities lender. The amount of cash advanced is recorded within Securities purchased under agreements to resell in the Consolidated Balance Sheets. These transactions are not considered purchases and the securities borrowed are not recognized by FHN. FHN does not conduct securities lending transactions. Securities purchased under agreements to resell and securities borrowing arrangements are evaluated for credit risk each reporting period. As presented in Note 16 - Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions, these agreements are collateralized by the related securities and collateral maintenance provisions with counterparties, including replenishment and adjustment on a transaction specific basis. This collateral includes both the securities collateral for each transaction as well as offsetting securities sold under agreements to repurchase with the same counterparty. Given the history of no credit losses and collateralized nature of these transactions, no credit loss has been recognized. Loans Held for Sale. Loans originated or purchased for which management lacks the intent to hold are included in loans held for sale in the Consolidated Balance Sheets. FHN generally accounts for loans held for sale at the lower of amortized cost or market value (“LOCOM”), with an exception for certain mortgage loans held for sale and repurchased loans that are not governmentally insured which are carried under the fair value option of reporting. On July 1, 2020 as part of the IBKC merger, FHN acquired a portfolio of loans held for sale which consisted of two components: • Fair Value Option Election. These loans, which represent the majority of the IBKC loans held for sale portfolio, consist of fixed rate single-family residential mortgage loans originated by IBKC and committed to be sold in the secondary market. Gains and losses on these mortgage loans are included in mortgage banking and title income. • Other Loans held for sale. For these loans, net unrealized losses, if any, are recognized through a valuation allowance that is recorded as a charge to noninterest income. Loans and Leases. Generally, loans are stated at principal amounts outstanding, net of unearned income. Interest on loans is recognized on an accrual basis at the applicable interest rate on the principal amount outstanding. Loan origination fees and direct costs as well as premiums and discounts are amortized as level yield adjustments over the respective loan terms. Unamortized net fees or costs, premiums and discounts are recognized in interest income upon early repayment of the loans. Cash collections from loans that were fully charged off prior to acquisition are recognized in noninterest income. Loan commitment fees are generally deferred and amortized on a straight-line basis over the commitment period. As a result of the IBKC merger, FHN acquired equipment financing leases to commercial customers, which are primarily classified as direct financing and sales-type leases. Equipment financing leases are reported at the net lease investment, which represents the sum of minimum lease payments over the lease term and the estimated residual value, less unearned interest income. Interest income is accrued as earned over the term of the lease based on the net investment in leases. Fees incurred to originate the lease are deferred and recognized as an adjustment of the yield on the lease. FHN also acquired a small amount of loans held for investment in the IBKC merger which are accounted for at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for further discussion of these loans. FHN has elected to exclude accrued interest receivable (“AIR”) from the amortized cost basis on its held-for-investment loan portfolio. FHN has also elected to not measure an allowance for credit losses on AIR for loans held for investment based on its policy to write off uncollectible interest in a timely manner, which occurs when a loan is placed on nonaccrual status. Such write-offs are recognized as a reduction of interest income. AIR for held-for-investment loans is included within Other assets in the Consolidated Balance Sheets. FHN has continued to accrue interest on loans for which payment deferrals have been extended to borrowers affected by the COVID-19 pandemic ("COVID-19 Deferrals"). Deferrals are made for durations up to six months, which is beyond FHN's normal write-off practices for accrued interest. Therefore, these interest deferrals do not qualify for FHN's election to not recognize a credit loss allowance for accrued interest. Accordingly, FHN has estimated credit losses for COVID-19 interest deferrals which is included within AIR in Other assets in the Consolidated Balance Sheets. Purchased Credit-Deteriorated Loans. Subsequent to 2019, at the time of acquisition FHN evaluates all acquired loans to determine if they have experienced a more-than-insignificant deterioration in credit quality since origination (“PCD loans”). PCD loans can be identified on either an 1) individual or 2) pooled basis when the loans share similar risk characteristics. FHN evaluates various absolute factors to assist in the identification of PCD loans, including criteria such as, existing PCD status, risk rating of special mention or lower, nonaccrual or impaired status, identification of prior TDRs, and delinquency status. FHN also utilizes relative factors to identify PCD loans such as commercial loan grade migration, expansion of borrower credit spreads, declines in external risk ratings and changes in consumer loan characteristics (e.g., FICO decline or LTV increase). In addition, factors reflective of broad economic considerations are also considered in identifying PCD loans. These include industry, collateral type, and geographic location for the borrower’s operations. Internal factors for origination of new loans that are similar to the acquired loans are also evaluated to assess loans for PCD status, including increases in required yields, necessity of borrowers’ providing additional collateral and/or guarantees and changes in acceptable loan duration. Other indicators may also be used to evaluate loans for PCD status depending on borrower-specific communications and actions, such public statements, initiation of loan modification discussions and obtaining emergency funding from alternate sources. Upon acquisition, the expected credit losses are allocated to the purchase price of individual PCD loans to determine each individual assets amortized cost basis, typically resulting in a reduction of the discount that is accreted prospectively to interest income. At the acquisition date and prospectively, only the unpaid principal balance is incorporated within the estimation of expected credit losses for PCD loans. Otherwise, the process for estimation of expected credit losses is consistent with that discussed below. As discussed below FHN applies undiscounted cash flow methodologies for the estimation of expected credit losses, which results in the calculated amount of credit losses at acquisition that is added to the amortized cost basis of the related PCD loans to exceed the discounted value of estimated credit losses included in the loan valuation. Purchased Credit-Impaired Loans. Prior to 2020, ASC 310-30 “Accounting for Certain Loans or Debt Securities Acquired in a Transfer,” established guidance for acquired loans that exhibited deterioration of credit quality between origination and the time of acquisition and for which the timely collection of the interest and principal was not reasonably assured (“PCI loans”). PCI loans were initially recorded at fair value which was estimated by discounting expected cash flows at acquisition date. The expected cash flows included all contractually expected amounts (including interest) and incorporated an estimate for future expected credit losses, pre-payment assumptions, and yield requirement for a market participant, among other things. To the extent possible, certain PCI loans were aggregated into pools with composite interest rate and cash flows expected to be collected for the pool. Aggregation into loan pools was based upon common risk characteristics that include similar credit risk or risk ratings, and one or more predominant risk characteristics. Each PCI pool was accounted for as a single unit. Accretable yield was initially established at acquisition and is the excess of cash flows expected at acquisition over the initial investment in the loan and was recognized in interest income over the remaining life of the loan, or pool of loans. Nonaccretable difference was initially established at acquisition and was the difference between the contractually required payments at acquisition and the cash flows expected to be collected at acquisition. FHN estimated expected cash flows for PCI loans on a quarterly basis. Increases in expected cash flows from the last measurement resulted in reversal of any nonaccretable difference (or allowance for loan and lease losses to the extent any has previously been recorded) with a prospective positive impact on interest income. Decreases to the expected cash flows resulted in an increase in the allowance for loan and lease losses through provision expense. FHN did not report PCI loans as nonperforming loans due to the accretion of interest income. Additionally, PCI loans that have been pooled and subsequently modified were not reported as troubled debt restructurings since the pool was the unit of measurement. Subsequent to 2019, PCI loans have transitioned to purchased-credit-deteriorated status and are accounted for as discussed above. Allowance for Credit Losses. The nature of the process by which FHN determines the appropriate ALLL requires the exercise of considerable judgment. See Note 5 - Allowance for Credit Losses for a discussion of FHN’s ALLL methodology and a description of the models utilized in the estimation process for the commercial and consumer loan portfolios. The discussion herein reflects periods before and after implementation of a change in credit loss estimation processes that was effective January 1, 2020. Future adjustments to the ALLL may be necessary if economic or other conditions differ substantially from the assumptions used in making the estimates or, if required by regulators, based upon information at the time of their examinations or upon future regulatory guidance. Such adjustments to original estimates, as necessary, are made in the period in which these factors and other relevant considerations indicate that loss levels vary from previous estimates. Subsequent to 2019 The ALLL is maintained at a level that management determines is sufficient to absorb current expected credit losses (“CECL”) in the loan portfolio. Management uses analytical models to estimate expected credit losses in the loan portfolio as of the balance sheet date. The models are carefully reviewed to identify trends that may not be captured in the modeled loss estimates. Management uses qualitative adjustments for those items not reflected in the modeled loss information such as recent changes from the macroeconomic forecasts utilized in model calculations, results of additional stressed modeling scenarios, observed and/or expected changes affecting borrowers in specific industries or geographic areas, exposure to large lending relationships and expected recoveries of prior charge offs. Loans accounted for at elected fair value are excluded from CECL measurements. The ALLL is increased by the provision for loan and lease losses and is decreased by loan charge-offs. The ALLL is determined in accordance with ASC 326-20 "Financial Instruments - Credit Losses.” Credit loss estimation is based on the amortized cost of Loans, net, which includes the following: 1. Unpaid principal balance for originated assets or acquisition price for purchased assets 2. Accrued interest (see elections discussed previously) 3. Accretion or amortization of premium, discount, and net deferred fees or costs 4. Collection of cash 5. Charge-offs 6. Foreign exchange adjustments (none for FHN) 7. Fair value hedge accounting adjustments (none for FHN) Premiums, discounts and net deferred origination costs/fees affect the calculated amount of expected credit losses but they are not considered when determining the amount of expected credit losses that are recorded. Under CECL, loans must be pooled when they share similar risk characteristics with other loans. Loans that do not share similar risk characteristics are evaluated individually. Expected credit loss is estimated for the remaining life of loan(s), which is limited to the remaining contractual term(s), adjusted for prepayment estimates, which are included as separate inputs into modeled loss estimates. Renewals and extensions are not anticipated unless they are included in existing loan documentation and are not unconditionally cancellable by the lender. However, losses are estimated over the estimated remaining life of reasonably expected TDRs which can extend beyond the current remaining contractual term. Estimates of expected credit losses incorporate consideration of available information that is relevant to assessing the collectability of future cash flows. This includes internal and external information relating to past events, current conditions and reasonable and supportable forecasts of future conditions. FHN utilizes internal historical loss information as the initial point for estimating expected credit losses. Given the duration of historical information available, FHN considers its internal loss history to fully incorporate the effects of prior credit cycles. The historical loss information may be adjusted in situations where current loan characteristics (e.g., underwriting criteria) differ from those in existence at the time the historical losses occurred. Historical loss information is also adjusted for differences in economic conditions, macroeconomic forecasts and other factors management considers relevant over a period extending beyond the measurement date which is considered reasonable and supportable. This reasonable and supportable period is followed by a reversion period after which loss estimates are based on long-term historical loss averages. FHN generally measures expected credit losses using undiscounted cash flow methodologies. Credit enhancements (e.g., guarantors) are considered in the estimation of uncollectible cash flows. Estimation of expected credit losses for loan agreements involving collateral maintenance provisions include consideration of the value of the collateral and replenishment requirements, with the maximum loss limited to the difference between the amortized cost of the loan and the fair value of the collateral. Expected credit losses for loans for which foreclosure is probable are measured at the fair value of collateral, less estimated costs to sell when disposition through sale is anticipated. Additionally, certain loans are valued at the fair value of collateral when repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty. Expected credit losses for TDRs are measured in accordance with ASC 310-40, which generally requires a discounted cash flow methodology, whereby the loans are measured based on the present value of expected future payments discounted at the loan’s original effective interest rate. Expected recoveries of previously charged-off amounts are also included as a qualitative adjustment in the estimation of expected credit losses, which reduces the amount of the allowance recognized. Estimates of recoveries on previously charged-off assets included in the valuation account do not exceed the aggregate of amounts previously written off and expected to be written off. Since CECL requires estimation of credit for the entire expected life of loans, loss estimates are highly sensitive to changes in macroeconomic forecasts, especially when those forecasts change dramatically in short time periods. Additionally, under CECL credit loss estimates are more likely to increase rapidly in periods of loan growth. Expected credit losses for unfunded commitments are estimated for periods where the commitment is not unconditionally cancellable by FHN. The measurement of expected credit losses for unfunded commitments mirrors that of loans with the additional estimate of future draw rates (timing and amount). Prior to 2020 The ALLL was maintained at a level that management determined was sufficient to absorb estimated probable incurred losses in the loan portfolio. The ALLL was increased by the provision for loan losses and loan recoveries and was decreased by loan charge-offs. The ALLL was determined in accordance with ASC 450-20-50 "Contingencies - Accruals for Loss Contingencies" and was composed of reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer and commercial loans. The reserve factors applied to these pools were an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics. Additionally, the ALLL included specific reserves established in accordance with ASC 310-10-35 for loans determined by management to be individually impaired as well as reserves associated with PCI loans. Management used analytical models to estimate probable incurred losses in the loan portfolio as of the balance sheet date. The models, which were primarily driven by historical losses, were carefully reviewed to identify trends that may not have been captured in the historical loss factors used in the models. Management used qualitative adjustments for those items not yet captured in the models like then-current events, recent trends in the portfolio, current underwriting guidelines, and local and macroeconomic trends, among other things. Key components of the estimation process were as follows: (1) commercial loans determined by management to be individually impaired loans were evaluated individually and specific reserves were determined based on the difference between the outstanding loan amount and the estimated net realizable value of the collateral (if collateral dependent), the present value of expected future cash flows or by observable market prices; (2) individual commercial loans not considered to be individually impaired were segmented based on similar credit risk characteristics and evaluated on a pool basis; (3) reserve rates for the commercial segment were calculated based on historical net charge-offs and were subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); (4) management’s estimate of probable incurred losses reflected the reserve rates applied against the balance of loans in the commercial segment of the loan portfolio; (5) consumer loans were generally segmented based on loan type; (6) reserve amounts for each consumer portfolio segment were calculated using analytical models based on delinquency trends and net loss experience and were subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); and (7) the reserve amount for each consumer portfolio segment reflected management’s estimate of probable incurred losses in the consumer segment of the loan portfolio. Impairment related to individually impaired loans was measured in accordance with ASC 310-10. All commercial portfolio segments, commercial TDRs and other individually impaired commercial loans were measured based on the present value of expected future payments discounted at the loan’s effective interest rate (“the DCF method”), observable market prices, or for loans that are solely dependent on the collateral for repayment, the net realizable value (collateral value less estimated costs to sell). Impaired loans also included consumer TDRs. Transfers of Financial Assets . Transfers of financial assets, or portions thereof which meet the definition of a participating interest, are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when 1) the assets have been legally isolated from FHN, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to FHN, and 3) FHN does not maintain effective control over the transferred assets. If the transfer does not satisfy all three criteria, the transaction is recorded as a secured borrowing. If the transfer is accounted for as a sale, the transferred assets are derecognized from FHN’s balance sheet and a gain or loss on sale is recognized. If the transfer is accounted for as a secured borrowing, the transferred assets remain on FHN’s balance sheet and the proceeds from the transaction are recognized as a liability. Servicing Rights . FHN recognizes the rights to service mortgage and other loans as separate assets, which are recorded in other assets in the Consolidated Balance Sheets, when purchased or when servicing is contractually separated from the underlying loans by sale with servicing rights retained. For loan sales with servicing retained, a servicing right, generally an asset, is recorded at fair value at the time of sale for the right to service the loans sold. All servicing rights are identified by class and amortized over the remaining service life of the loan with periodic reviews for impairment. Investment Tax Credit . In conjunction with the IBKC merger, FHN has elected to utilize the deferral method for acquired investments that generate investment tax credits. This includes both solar and historic tax credit investments. Under this approach, the investment tax credits are r

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures On July 1, 2020, FHN and IBERIABANK Corporation ("IBKC") closed their merger-of-equals transaction. FHN issued approximately 243 million shares of FHN common stock, plus three new series of preferred stock (Series B, Series C, and Series D) in a transaction valued at $2.5 billion. At the time of closing, IBKC operated 319 offices in 12 states, mostly in the southern and southeastern U.S. The merger-of-equals transaction has been accounted for as a business combination. Accordingly, the assets acquired and liabilities assumed are presented at their fair values as of the merger date. The determination of fair value requires management to make estimates about discount rates, future expected cash flows, market conditions and other future events that are highly subjective in nature and subject to change. The following schedule details a preliminary allocation of merger consideration to the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed from IBKC as of July 1, 2020. (Dollars in thousands) IBERIABANK Corporation Assets: Cash and due from banks $ 129,553 Interest-bearing deposits with banks 1,947,933 Securities available for sale at fair value 3,544,364 Loans held for sale 319,743 Loans and leases (a) 25,917,828 Allowance for loan and lease losses (284,457) Other intangible assets 237,763 Premises and equipment 310,617 Other real estate owned ("OREO") 8,593 Other assets 1,126,786 Total assets acquired $ 33,258,723 Liabilities: Deposits 28,231,609 Short-term borrowings 208,733 Term borrowings 1,199,533 Other liabilities 585,143 Total liabilities assumed $ 30,225,018 Net assets acquired $ 3,033,705 Consideration paid: Consideration for outstanding common stock 2,242,611 Consideration for equity awards 28,291 Consideration for preferred stock 230,641 Cash in lieu of fractional shares 12 Total consideration paid $ 2,501,555 Preliminary purchase accounting gain $ (532,150) (a) Includes $1.3 billion of initial net investments in sales-type and direct financing leases. In relation to the merger-of-equals, FHN recorded a preliminary $532.2 million purchase accounting gain, representing the shortfall of the purchase price under the acquisition accounting value of net assets acquired, net of deferred taxes. The preliminary purchase accounting gain is not taxable. Due to the fact that back office functions (including loan and deposit processing) still have not 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 IBKC's loans and leases, allowance for loan and lease losses, loans held-for-sale, premises and equipment, OREO, other assets, tax receivables and payables, core deposit intangibles, other intangibles, time deposits, acquired debt, lease assets and liabilities, 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 permanent and temporary (timing) differences between the book and tax bases of the acquired assets and liabilities assumed. Additionally, the accounting policies of both FHN and IBKC are in the process of being reviewed in detail. Upon completion of such review, conforming adjustments or financial statement reclassification may be determined. The following is a description of the methods used to determine the fair values of significant assets acquired and liabilities assumed presumed above. Cash and due from banks and Interest-bearing deposits with banks: The carrying amount of these assets is a reasonable estimate of fair value based on the short-term nature of these assets. Securities available for sale: Fair values for securities were based on quoted market prices where available. If quoted market prices are not available, fair value estimates are based on observable inputs obtained from market transactions in similar securities. Securities held to maturity were reclassified to securities available for sale based on FHN's intent at closing. Loans: Fair values for loans were based on a discounted cash flow methodology that considered factors including loan type and related collateral, classification status, remaining term of the loan, fixed or variable interest rate, amortization status and current discount rates. Expected cash flows were derived using inputs consistent with management's assessment of credit risk for allowance measurement with adjustments for consistency with fair value measurement concepts. Large loans were specifically reviewed to evaluate credit risk. Loans were valued individually although multiple inputs were applied to loans with similar characteristics as appropriate. The discount rate did not include an explicit factor for credit losses, as that was included as a reduction to the estimated cash flows. Leases: Sales-type and direct financing leases were valued at the net investment in the lease which consists of both the lease receivable (including both the remaining lease payments and the guaranteed residual asset value) and the unguaranteed residual asset, if any. Discounting of the lease receivable was performed using the rate implicit in the lease. The unguaranteed residual asset represents the difference in the fair value of the underlying asset and the lease receivable and therefore includes consideration of all terms and conditions in the lease. Intangible assets: Core deposit intangible assets ("CDI") represents the value of the relationships with deposit customers. The fair value for CDI was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative costs of funds, and the interest costs associated with the customer deposits. The CDI is being amortized over its estimated useful life of approximately ten years utilizing an accelerated method. Customer relationship intangibles are valued using a discounted cash flow methodology that reflects the estimated value of the future net earnings from the relationships which includes adjustments for estimated attrition. Loans Held for Sale: The valuation of loans held for sale, primarily conforming mortgages, reflected quotes or bids on these loans directly from the purchasing financial institutions. Allowance for Loan and Lease Losses: The allowance for loan losses relates to PCD loans and was determined using a methodology consistent with that described in Note 5 - Allowance for Credit Losses with inputs determined as of the merger date . Derivatives: Derivative assets and liabilities are included in Other assets and Other liabilities. Forward sales contracts are valued using current transactions involving identical securities. Interest rate swaps, interest rate locks, interest rate collars, interest rate floors, and equity indexed derivatives are estimated using prices of financial instruments with similar characteristics and observable inputs. Risk participations also incorporate an estimate of credit risk. Lease Assets and Lease Liabilities: Lease assets and lease liabilities were measured using a methodology that involved estimating the future rental payments over the remaining lease term with discounting using a fully-collateralized discount rate. The lease term was determined for individual leases based on management's assessment of the probability of exercising existing renewal options. The net effect of any off-market terms in a lease were also discounted and applied to the balance of the lease asset. Premises and Equipment: Land and buildings held for use are valued at appraised values, which reflect considerations of recent disposition values for similar property types with adjustments for characteristics of individual properties. Locations held for sale are valued at appraised values which also reference recent disposition values for similar property types but also considers marketability discounts for vacant properties. The valuations of locations held for sale are reduced by estimated costs to sell. Other fixed assets are valued using a discounted cash flow methodology which reflects estimates of future value of assets to a hypothetical buyer. OREO: OREO properties are valued at estimated fair value less estimated costs to sell the real estate. Estimated fair value is determined using appraised values which includes consideration of recent disposition values for similar property types with adjustments for characteristics of individual properties. Deposits : The fair values used for the demand and savings deposits by definition equal the amount payable on demand at the acquisition date. Fair values for time deposits were estimated using a discounted cash flow analysis applying interest rates currently offered to the contractual interest rates on such time deposits. Short-term borrowings: The carrying amount of these liabilities is a reasonable estimate of fair value based on the short-term nature of these liabilities. Term Borrowings: The fair values of long-term debt instruments are estimated based on quoted market prices for instrument if available, or for similar instruments if not available. For redeemable debt instruments, an evaluation of the debt terms in comparison to current financing alternatives was performed to evaluate if the redemption value represented the fair value relevant to a market participant. If pricing for similar instruments is not available, a discounted cash flow analysis is utilized based on estimated current borrowing rates for similar types of instruments and considers whether the debt is currently callable. Estimated discount rates are determined from the perspective of the post-merger combined entity rather than the acquiree and/or original issuers. FHN's operating results for the three and nine months ended September 30, 2020 include the operating results of the acquired assets and assumed liabilities of IBKC subsequent to the merger-of-equals transaction on July 1, 2020. The following table presents unaudited pro forma information as if the transaction occurred on January 1, 2019. The pro forma information does not necessarily reflect the results of operations that would have occurred had the two companies combined on January 1, 2019. Furthermore, cost savings and other business synergies related to the transaction are not reflected in the pro forma amounts. Actual from acquistion date through September 30, 2020 Unaudited Pro Forma Information for the (Dollars in thousands) Three Months Ended September 30, 2020 Three Months Ended September 30, 2019 (a) Nine Months Ended September 30, 2020 Nine Months Ended September 30, 2019 (a) Net interest income $ 222,912 $ 550,636 $ 566,174 $ 1,691,623 $ 1,711,502 Noninterest income 89,510 290,773 235,409 783,132 645,781 Net income (loss) (41,750) 71,162 218,572 359,214 654,884 (a) Three and nine months ended September 30, 2019 does not include the impact of CECL which was adopted January 1, 2020. Total merger and integration expenses for the IBKC merger recognized for the three and nine months ended September 30, 2020 are presented in the table below: (Dollars in thousands) Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 Legal and professional fees (a) $ 29,984 $ 34,394 Personnel expense (b) 34,846 40,240 Contribution expense (c) 20,000 20,000 Miscellaneous expense (d) 11,138 12,395 Total IBKC acquisition expense $ 95,968 $ 107,029 (a) Primarily comprised of fees for legal, accounting, and merger consultants. (b) Primarily comprised of fees for severance and retention. (c) Comprised of contribution expense related to the establishment of the First Horizon Louisiana Foundation. (d) Primarily comprised of fees for travel and entertainment, contract employment, contributions and other miscellaneous expenses. On July 17, 2020, First Horizon Bank completed its purchase of 30 branches from Truist Bank. As part of the transaction, FHN assumed approximately $2.2 billion of branch deposits for a 3.40% deposit premium and purchased approximately $423.4 million of branch loans. The branches are in communities in North Carolina (20 branches), Virginia (8 branches), and Georgia (2 branches). This transaction qualifies as a business combination. Due to the timing of transaction completion in relation to quarter end, FHN considers its valuations of Truist's loans, fixed assets, core deposit intangible assets and other liabilities 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. Fair value estimates related to the acquired assets and liabilities assumed are subject to adjustment for up to one year after the closing date of the transaction as additional information as of closing date becomes available. The following schedule details a preliminary allocation of merger consideration to the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed from Truist Bank as of July 17, 2020. (Dollars in thousands) Truist Bank Assets: Cash and due from banks $ 2,201,685 Loans and leases 423,397 Allowance for loan and lease losses (2,355) Other intangible assets 7,000 Premises and equipment 10,965 Other assets 27,700 Total assets acquired $ 2,668,392 Liabilities: Deposits 2,194,870 Other liabilities 29,733 Total liabilities assumed $ 2,224,603 Net assets acquired $ 443,789 Consideration paid: Cash 521,433 Total consideration paid $ 521,433 Preliminary goodwill $ 77,644 In relation to the acquisition, FHN recorded $77.6 million in goodwill, representing the excess of acquisition consideration over the estimated fair value of net assets acquired. All goodwill has been attributed to FHN's Regional Banking segment (refer to Note 7 - Intangible Assets for additional information). This goodwill is the result of expected synergies, operational efficiencies and other factors. FHN's operating results for the three and nine months ended September 30, 2020 include the operating results of the acquired assets and assumed liabilities of Truist Bank subsequent to the acquisition on July 17, 2020. See Note 2- Acquisitions and Divestitures in the Notes to Consolidated Financial Statements on Form 10-K for the year ended December 31, 2019, for additional information about FHN's other acquisitions. Expenses related to FHN's merger and integration activities are recorded in FHN's Corporate segment. Total other merger and integration expense recognized for the three and nine months ended September 30, 2020 and 2019 are presented in the table below: Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Legal and professional fees (a) $ 1,196 $ 3,507 $ 3,322 $ 9,852 Personnel expense (b) 303 1,473 786 4,462 Contract employment and outsourcing (c) 203 223 929 240 Net occupancy expense (d) 449 (76) 342 1,547 Miscellaneous expense (e) 951 1,022 2,276 2,170 All other expense (f) 1,723 2,840 6,207 5,025 Total $ 4,825 $ 8,989 $ 13,862 $ 23,296 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Primarily comprised of fees for legal, accounting, 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 expenses associated with lease exits. (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, internal technology development costs, costs of shareholder matters and asset impairments, as well as other miscellaneous expenses. In addition to the transactions mentioned above, FHN acquires or divests assets from time to time in transactions that are considered business combinations or divestitures but are not material to FHN individually or in the aggregate. In April 2019, FHN sold a subsidiary acquired as part of the CBF merger in 2017 that did not fit within FHN's risk profile. The sale resulted in the removal of approximately $25 million UPB of subprime consumer loans from Loans held for sale on FHN's Consolidated Balance Sheets.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2020
Marketable Securities [Abstract]
Investment Securities	Investment Securities The following tables summarize FHN’s investment securities on September 30, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Amortized Gross Gross Fair Securities available for sale: U.S. treasuries $ 300,037 $ — $ (3) $ 300,034 Government agency issued mortgage-backed securities (“MBS”) 3,731,490 97,734 (2,158) 3,827,066 Government agency issued collateralized mortgage obligations (“CMO”) 2,675,192 31,694 (1,439) 2,705,447 Other U.S. government agencies 644,328 13,942 (4) 658,266 Corporates and other debt 39,936 74 — 40,010 States and municipalities 421,754 10,342 (6) 432,090 $ 7,812,737 $ 153,786 $ (3,610) 7,962,913 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (a) 32,959 Total securities available for sale (b) $ 7,995,872 (a) SBA-interest only strips are recorded at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for additional information. (b) Includes $5.7 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. December 31, 2019 (Dollars in thousands) Amortized Gross Gross Fair Securities available for sale: U.S. treasuries $ 100 $ — $ — $ 100 Government agency issued MBS 2,316,381 34,692 (2,556) 2,348,517 Government agency issued CMO 1,667,773 9,916 (7,197) 1,670,492 Other U.S. government agencies 303,463 3,750 (1,121) 306,092 Corporates and other debt 40,054 486 — 40,540 States and municipalities 57,232 3,324 (30) 60,526 $ 4,385,003 $ 52,168 $ (10,904) 4,426,267 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (a) 19,136 Total securities available for sale (b) $ 4,445,403 (a) SBA-interest only strips are recorded at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.8 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. The amortized cost and fair value by contractual maturity for the available-for-sale debt securities portfolios on September 30, 2020 are provided below: Available-for-Sale (Dollars in thousands) Amortized Fair Within 1 year $ 453,324 $ 455,069 After 1 year; within 5 years 192,172 196,096 After 5 years; within 10 years 152,870 160,078 After 10 years 607,689 619,157 Subtotal 1,406,055 1,430,400 Government agency issued MBS and CMO (a) 6,406,682 6,532,513 Total $ 7,812,737 $ 7,962,913 (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, 2020 and 2019. Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Gross gains on sales of debt securities $ 1,442 $ — $ 1,442 $ — Gross (losses) on sales of debt securities (2,765) — (2,765) (267) Net gains (losses) on sales of debt securities (a) $ (1,323) $ — $ (1,323) $ (267) (a) Cash proceeds for the three and nine months ended September 30, 2020 were not material. Cash proceeds for the three months ended September 30, 2019, were not material. Cash proceeds for the nine months ended September 30, 2019 were $182.8 million. The following tables provide information on investments within the available-for-sale portfolio that had unrealized losses as of September 30, 2020 and December 31, 2019: As of September 30, 2020 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. treasuries $ 299,934 $ (3) $ — $ — $ 299,934 $ (3) Government agency issued MBS 568,733 (2,158) — — 568,733 (2,158) Government agency issued CMO 636,386 (1,439) — — 636,386 (1,439) Other U.S. government agencies 30,896 (4) $ — $ — 30,896 (4) States and municipalities 5,191 (6) — — 5,191 (6) Total temporarily impaired securities $ 1,541,140 $ (3,610) $ — $ — $ 1,541,140 $ (3,610) As of December 31, 2019 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. treasuries $ — $ — $ 100 $ — $ 100 $ — Government agency issued MBS 174,983 (495) 192,755 (2,061) 367,738 (2,556) Government agency issued CMO 378,815 (1,970) 361,124 (5,227) 739,939 (7,197) Other U.S. government agencies 98,471 (1,121) — — 98,471 (1,121) States and municipalities 3,551 (30) — — 3,551 (30) Total temporarily impaired securities $ 655,820 $ (3,616) $ 553,979 $ (7,288) $ 1,209,799 $ (10,904) For periods subsequent to 2019, FHN has evaluated all AFS debt securities that were in unrealized loss positions in accordance with its accounting policy for recognition of credit losses. No AFS debt securities were determined to have credit losses because the primary cause of the decline in value was attributable to changes in interest rates. Total AIR not included in the fair value or amortized cost basis of AFS debt securities was $21.8 million as of September 30, 2020. Consistent with FHN's review of the related securities, there were no credit-related write downs of AIR for AFS debt securities during the reporting period. Additionally, for AFS 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. Therefore, no write downs of these investments to fair value occurred during the reporting period. For periods prior to 2020, FHN reviewed debt investment securities that were in unrealized loss positions in accordance with its accounting policy for OTTI and did not consider them other-than-temporarily impaired. For debt securities with unrealized losses, FHN did not intend to sell them and it is more-likely-than-not that FHN would not be required to sell them prior to recovery. The decline in value was primarily attributable to changes in interest rates and not credit losses. The carrying amount of equity investments without a readily determinable fair value was $55.2 million and $25.6 million at September 30, 2020 and December 31, 2019, respectively. The year-to-date 2020 and 2019 gross amounts of upward and downward valuation adjustments were not significant. Unrealized gains of $1.2 million and $0.4 million were recognized in the three months ended September 30, 2020 and 2019, respectively, and unrealized losses of $3.6 million and unrealized gains of $4.9 million were recognized in the nine months ended September 30, 2020 and 2019, respectively, for equity investments with readily determinable fair values.

Loans and Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans and Leases	Loans and Leases The following tables and data as of September 30, 2020 include the loan and lease balances acquired in the IBKC merger and Truist Bank branch acquisition, which were recorded at fair value on their respective transaction closing dates. See Note 2 - Acquisitions and Divestitures for further information. As discussed in Note 1 - Financial Information, the ALLL estimation process was revised on January 1, 2020 to reflect the adoption of ASU 2016-13. All information contained in the following disclosures reflects the application of requirements from the adoption of ASU 2016-13 for periods after 2019. Information for periods prior to 2020 has been retained with the content consistent with prior disclosures. Loans and leases are disclosed in portfolio segments and classes. A class is generally a disaggregation of a portfolio segment. In determining classes, FHN considered the loan characteristics and methods it applies in monitoring and assessing credit risk and performance. FHN's loan and lease portfolio segments are commercial and consumer. The classes of loans and leases are: commercial, financial, and industrial ("C&I"), which includes commercial and industrial loans and loans to mortgage companies ("LMC"), commercial real estate ("CRE"), consumer real estate, which includes both real estate ("R/E") installment and home equity lines of credit ("HELOCs"), and credit card and other. The following table provides the amortized cost basis of loans and leases by portfolio segment and class as of September 30, 2020 and December 31, 2019, excluding accrued interest of $177.5 million and $84.6 million, which is included in Other assets in the Consolidated Balance Sheets. September 30, December 31, (Dollars in thousands) 2020 2019 Commercial: Commercial and industrial (a) $ 28,048,649 $ 15,640,208 Loans to mortgage companies 5,607,068 4,410,883 Total commercial, financial, and industrial 33,655,717 20,051,091 Commercial real estate 12,510,887 4,337,017 Consumer: HELOC 2,549,837 1,287,441 R/E installment loans 9,778,032 4,889,698 Total consumer real estate 12,327,869 6,177,139 Credit card and other 1,212,058 495,864 Loans and leases $ 59,706,531 $ 31,061,111 Allowance for loan and lease losses (988,102) (200,307) Net loans and leases $ 58,718,429 $ 30,860,804 (a) September 30, 2020 balance includes equipment financing leases of $524.2 million. In addition to loans issued in the normal course of business, FHN considers overdrafts on customer deposit accounts to be loans and reclassifies these overdrafts as loans in its consolidated balance sheets. At September 30, 2020 and December 31, 2019, overdrafts of $9.0 million and $8.1 million, respectively, had been reclassified to loans. Loans and leases with carrying values of $39.4 billion and $19.2 billion were pledged as collateral for borrowings at September 30, 2020 and December 31, 2019, respectively. Portfolio Segment Risk Factors Commercial Loans and Leases The C&I portfolio is comprised of loans and leases used for general business purposes. Typical products including working capital lines of credit, term loan financing of owner-occupied real estate and fixed assets, direct financing and sales-type leases, and trade credit enhancement through letters of credit. FHN utilizes deal teams comprised of relationship managers (RMs), portfolio managers (PMs), credit analysts and other specialists to identify, mitigate, document, and manage ongoing risk. Their function includes enhanced analytical support during loan origination and servicing, monitoring the financial condition of the borrower, and tracking compliance with loan agreements. FHN strives to identify problem assets early through comprehensive policies and guidelines, targeted portfolio reviews, more frequent servicing on lower rated borrowers, and an emphasis on frequent grading. To the extent a guarantor/sponsor is used to support a commercial lending decision, FHN analyzes capability to pay, factoring in, among other things, liquidity and direct/indirect cash flows. A strong, legally enforceable guaranty can mitigate the risk of default or loss, justify a less severe rating, and consequently reduce the level of allowance or charge-off that might otherwise be deemed appropriate. 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. Over 99% of the loans to mortgage companies are collateralized with government guaranteed loans. The loans are of short duration with maturities less than one year. Commercial Real Estate loans include financings for commercial construction and nonconstruction loans. Income-producing CRE loans and draws on lines and letters of credit are to commercial real estate developers for the construction and mini-permanent financing of income-producing real estate. Residential CRE loans are to residential builders and developers for the purpose of constructing single-family homes, condominiums, and town homes and on a limited basis, for developing residential subdivisions. Active residential CRE lending is primarily focused in certain core markets with nearly all new originations made to “strategic” clients. FHN considers a “strategic” residential CRE borrower as a homebuilder who demonstrates the ability to withstand cyclical downturns, maintains active development and investment activities providing for regular financing opportunities, and is fundamentally sound as evidenced by a prudent loan structure, appropriate covenants and recourse, and capable and willing sponsors in markets with positive homebuilding and economic dynamics. The credit administration and ongoing monitoring of these portfolios consists of multiple internal control processes including stressing a borrower’s or project’s financial capacity utilizing numerous attributes such as interest rates, vacancy, and discount rates. Key information captured from the various portfolios is aggregated and utilized to assist with the assessment and adequacy of the ALLL and to steer portfolio management strategies. Paycheck Protection Program Loans Included in C&I loans are $4.2 billion of loans made under the Paycheck Protection Program ("PPP Loans") of the Small Business Administration ("SBA"). PPP Loans have been extended to businesses in response to the economic effects of the COVID-19 pandemic. PPP Loans are fully government guaranteed with the SBA making prepayments through a provision whereby partial or complete forgiveness is granted based on the nature and extent of each borrower's expenditures in relation to program requirements for payroll-related and other types of expenses. PPP Loans have maximum terms ranging from two to five years, with the amount of the loan forgiven by the SBA expected to be paid in the latter half of 2020 and the first half of 2021. Amounts not forgiven by the SBA will amortize over the applicable remaining loan term. Due to the government guarantee and forgiveness provisions, PPP Loans are considered to have no credit risk and receive no risk weighting for capital calculations. Consumer Loans The consumer real estate portfolio is primarily comprised of home equity lines and installment loans within FHN’s regional banking segment and jumbo mortgages and one-time-close (“OTC”) completed construction loans in FHN’s non-strategic segment that were originated through pre-2009 mortgage businesses. The corporate segment also includes loans that were previously included in off-balance sheet proprietary securitization trusts that were brought back into the loan portfolios at fair value through the execution of cleanup calls due to the relatively small balances left in the securitization and should continue to run-off. Generally performance of the consumer real estate portfolio is affected by life events that affect borrowers’ finances, the level of unemployment, and home prices. FHN obtains first lien performance information from third parties and through loss mitigation activities. FHN performs continuous HELOC account review processes in order to identify higher-risk home equity lines and initiate preventative and corrective actions. The reviews consider a number of account activity patterns and characteristics such as the number of times delinquent within recent periods, changes in credit bureaus score since origination, scored degradation, performance of the first lien, and account utilization. FHN may block future draws on accounts in order to mitigate risk of loss to FHN. The credit card and other portfolio is primarily comprised of automobile loans, credit card receivables, and other consumer-related credits. Concentrations FHN has a concentration of residential real estate loans (21% of total loans). Loans to finance and insurance companies total $3.1 billion (9% of the C&I portfolio, or 5% of the total loans). FHN had loans to mortgage companies totaling $5.6 billion (17% of the C&I segment, or 9% of total loans) as of September 30, 2020. As a result, 26% of the C&I portfolio is sensitive to impacts on the financial services industry. Credit 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. 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). Special mention loans and leases have potential weaknesses that, if left uncorrected, may result in deterioration of FHN's credit position at some future date. Substandard commercial loans and leases have well-defined weaknesses and are characterized by the distinct possibility that FHN will sustain some loss if the deficiencies are not corrected. Doubtful commercial loans and leases have the same weaknesses as substandard loans and leases with the added characteristics that the probability of loss is high and collection of the full amount is improbable. The following tables provide the amortized cost basis of the commercial loan portfolio by year of origination and credit quality indicator as of September 30, 2020: C&I (Dollars in thousands) 2020 2019 2018 2017 2016 Prior to 2016 LMC (a) Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) (c) $ 7,795,816 $ 5,770,378 $ 3,036,673 $ 1,917,886 $ 1,323,236 $ 2,414,920 $ 5,607,068 $ 4,533,240 $ 60,592 $ 32,459,809 Special Mention (PD grade 13) 86,675 75,224 53,067 22,692 45,640 80,438 — 123,383 47,364 534,483 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 107,126 111,716 109,639 50,811 60,082 46,871 — 165,173 10,007 661,425 Total C&I loans $ 7,989,617 $ 5,957,318 $ 3,199,379 $ 1,991,389 $ 1,428,958 $ 2,542,229 $ 5,607,068 $ 4,821,796 $ 117,963 $ 33,655,717 (a) LMC includes non-revolving 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. The loans are of short duration with maturities less than one year. (b) $40.0 million of C&I loans were converted from revolving to term in 2020. (c) 2020 balance includes PPP loans. CRE (Dollars in thousands) 2020 2019 2018 2017 2016 prior to 2016 Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) 2,099,167 3,244,741 1,940,046 1,410,004 1,056,094 2,015,504 300,752 18,836 12,085,144 Special Mention (PD grade 13) 15,089 31,230 97,016 35,573 83,254 45,875 4,065 — 312,102 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 676 2,481 22,018 41,211 8,180 31,746 7,329 — 113,641 Total CRE loans 2,114,932 3,278,452 2,059,080 1,486,788 1,147,528 2,093,125 312,146 18,836 12,510,887 The following table provides the balances of commercial loan portfolio classes with associated allowance, disaggregated by PD grade as of December 31, 2019. December 31, 2019 (Dollars in thousands) C&I Loans to CRE Total Percentage Allowance PD Grade: Pass (PD grades 1 through 12) (a) $ 15,035,946 $ 4,410,883 $ 4,252,361 $ 23,699,190 98 % $ 114,094 Special Mention (PD grade 13) 232,823 — 34,092 266,915 1 8,142 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 263,076 — 44,026 307,102 1 29,318 Collectively evaluated for impairment 15,531,845 4,410,883 4,330,479 24,273,207 100 151,554 Individually evaluated for impairment 82,438 — 1,563 84,001 — 6,196 Purchased credit-impaired loans 25,925 — 4,975 30,900 — 848 Total commercial loans $ 15,640,208 $ 4,410,883 $ 4,337,017 $ 24,388,108 100 % $ 158,598 (a) Balances presented net of a $19.1 million valuation allowance. 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 amortized cost basis by year of origination and refreshed FICO scores for consumer real estate loans as of September 30, 2020. Within consumer real estate, classes include home equity line of credit ("HELOC") and real estate installment. HELOCs are loans which during their draw period are classified as revolving loans. Once the draw period ends and the loan enters its repayment period, the loan converts to a term loan and is classified as revolving loans converted to term loans. All loans classified in the following table as revolving loans or revolving loans converted to term loans are HELOCs. Real estate installment loans are originated as a fixed term loan and are classified below in their vintage year from prior to 2016 to 2020. All loans in the following table classified in a vintage year are real estate installment loans. Consumer Real Estate (Dollars in thousands) 2020 2019 2018 2017 2016 Prior to 2016 Revolving Revolving Total FICO score 740 or greater $ 809,079 $ 1,242,805 $ 797,553 $ 677,865 $ 746,150 $ 1,910,304 $ 1,304,498 $ 178,921 $ 7,667,175 FICO score 720-739 96,670 168,223 110,859 81,669 93,933 205,824 204,419 30,342 991,939 FICO score 700-719 84,995 122,293 89,193 84,727 73,587 225,227 181,823 39,361 901,206 FICO score 660-699 88,346 146,789 143,213 88,989 91,062 316,577 263,818 63,156 1,201,950 FICO score 620-659 21,847 73,365 40,104 28,207 36,391 140,682 87,205 39,707 467,508 FICO score less than 620 357,712 48,100 53,006 61,476 97,995 323,215 99,561 57,026 1,098,091 Total $ 1,458,649 $ 1,801,575 $ 1,233,928 $ 1,022,933 $ 1,139,118 $ 3,121,829 $ 2,141,324 $ 408,513 $ 12,327,869 (a) $22.7 million of HELOC loans were converted from revolving to term in 2020. The following table reflects the amortized cost basis by year of origination and refreshed FICO scores for credit card and other loans as of September 30, 2020. Credit Card and Other (Dollars in thousands) 2020 2019 2018 2017 2016 Prior to 2016 Revolving Revolving Total FICO score 740 or greater $ 45,014 $ 60,629 $ 67,379 $ 44,445 $ 27,990 $ 129,793 $ 143,754 $ 5,263 $ 524,267 FICO score 720-739 6,617 8,673 10,856 9,913 9,051 29,740 90,623 1,630 167,103 FICO score 700-719 6,172 9,215 9,903 8,635 4,567 42,102 41,039 1,731 123,364 FICO score 660-699 27,173 14,206 16,352 11,032 10,600 53,772 54,963 3,737 191,835 FICO score 620-659 3,526 5,559 7,990 5,761 12,823 29,168 19,492 1,406 85,725 FICO score less than 620 22,715 7,406 16,024 10,876 9,432 28,960 22,835 1,516 119,764 Total $ 111,217 $ 105,688 $ 128,504 $ 90,662 $ 74,463 $ 313,535 $ 372,706 $ 15,283 $ 1,212,058 (a) $5.3 million of other consumer loans were converted from revolving to term in 2020. The following table reflects the percentage of balances outstanding, by average refreshed FICO scores, for the HELOC and real estate installment classes of loans as of December 31, 2019. December 31, 2019 (Dollars in thousands) HELOC R/E Installment Loans (b) FICO score 740 or greater 62.0 % 71.9 % FICO score 720-739 8.6 8.3 FICO score 700-719 7.6 6.3 FICO score 660-699 10.8 8.1 FICO score 620-659 4.7 2.8 FICO score less than 620 (a) 6.3 2.6 Total 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 and Leases Loans and leases are placed on nonaccrual if it becomes evident that full collection of principal and interest is at risk, impairment has been recognized as a partial charge-off of principal balance due to insufficient collateral value and past due status, or on a case-by-case basis if FHN continues to receive payments but there are other borrower-specific issues. Included in nonaccrual are loans for which FHN continues to receive payments including residential real estate loans where the borrower has been discharged of personal obligation through bankruptcy. Past due loans are loans contractually past due as to interest or principal payments, but which have not yet been put on nonaccrual status. The following table reflects accruing and non-accruing loans and leases by class on September 30, 2020: Accruing Non-Accruing (Dollars in thousands) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) (b) $ 27,815,798 $ 19,892 $ 149 $ 27,835,839 $ 126,674 $ 25,327 $ 60,809 $ 212,810 $ 28,048,649 Loans to mortgage companies 5,607,068 — — 5,607,068 — — — — 5,607,068 Total commercial and industrial 33,422,866 19,892 149 33,442,907 126,674 25,327 60,809 212,810 33,655,717 Commercial real estate: CRE 12,444,693 15,133 — 12,459,826 42,517 2,531 6,013 51,061 12,510,887 Consumer real estate: HELOC 2,467,907 11,884 6,892 2,486,683 47,101 4,628 11,425 63,154 2,549,837 R/E installment loans 9,631,513 22,922 6,663 9,661,098 54,606 3,394 58,934 116,934 9,778,032 Total consumer real estate 12,099,420 34,806 13,555 12,147,781 101,707 8,022 70,359 180,088 12,327,869 Credit card and other: Credit card 267,880 1,513 789 270,182 242 38 49 329 270,511 Other 936,179 2,698 122 938,999 963 682 903 2,548 941,547 Total credit card and other 1,204,059 4,211 911 1,209,181 1,205 720 952 2,877 1,212,058 Total loans and leases, net of unearned income $ 59,171,038 $ 74,042 $ 14,615 $ 59,259,695 $ 272,103 $ 36,600 $ 138,133 $ 446,836 $ 59,706,531 (a) $125.7 million of C&I loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance. (b) C&I loans include $209.4 million in TRUPs loans, which are presented net of an amortizing discount of $18.2 million. The following table reflects accruing and non-accruing loans by class on December 31, 2019: Accruing Non-Accruing (Dollars in thousands) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) $ 15,532,579 $ 7,155 $ 237 $ 15,539,971 $ 36,564 $ 14,385 $ 23,363 $ 74,312 $ 15,614,283 Loans to mortgage companies 4,410,883 — — 4,410,883 — — — — 4,410,883 Purchased credit-impaired loans 23,840 287 1,798 25,925 — — — — 25,925 Total commercial and industrial 19,967,302 7,442 2,035 19,976,779 36,564 14,385 23,363 74,312 20,051,091 Commercial real estate: CRE 4,329,531 686 — 4,330,217 — 485 1,340 1,825 4,332,042 Purchased credit-impaired loans 4,752 128 95 4,975 — — — — 4,975 Total commercial real estate 4,334,283 814 95 4,335,192 — 485 1,340 1,825 4,337,017 Consumer real estate: HELOC 1,217,344 9,156 5,669 1,232,169 43,007 4,227 7,472 54,706 1,286,875 R/E installment loans 4,812,446 12,894 9,170 4,834,510 20,710 1,076 9,202 30,988 4,865,498 Purchased credit-impaired loans 18,720 2,770 3,276 24,766 — — — — 24,766 Total consumer real estate 6,048,510 24,820 18,115 6,091,445 63,717 5,303 16,674 85,694 6,177,139 Credit card and other: Credit card 198,917 1,076 1,178 201,171 — — — — 201,171 Other 291,700 1,802 337 293,839 101 44 189 334 294,173 Purchased credit-impaired loans 323 98 99 520 — — — — 520 Total credit card and other 490,940 2,976 1,614 495,530 101 44 189 334 495,864 Total loans and leases, net of unearned income $ 30,841,035 $ 36,052 $ 21,859 $ 30,898,946 $ 100,382 $ 20,217 $ 41,566 $ 162,165 $ 31,061,111 Certain previously reported amounts have been reclassified to agree with current presentation. (a) C&I loans include $218.3 million in TRUPs loans, which are presented net of an amortizing discount of $19.1 million. Collateral-Dependent Loans Collateral-dependent loans are defined as loans for which repayment is expected to be derived substantially through the operation or sale of the collateral and where the borrower is experiencing financial difficulty. At a minimum, the estimated value of the collateral for each loan equals the current book value. As of September 30, 2020 , FHN had C&I loans with amortized cost of approxima tely $247.7 million that was based on the value of underlying collateral. The collateral for these loans generally consists of business assets including land, buildings, equipment and financial assets. During the three and nine months ended September 30, 2020 , respectively, FHN recognized charge-offs of approxima tely $18.1 million and $31.1 million on these loans related to reductions in estimated collateral values. Consumer HELOC and installment loans with amortized cost based on the value of underlying real estate collateral were approximat ely $9.7 million and $26.2 million, respectively, as of September 30, 2020. Charge-offs during the three and nine months ended September 30, 2020 were not significant for either portfolio segment. 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. In accordance with regulatory guidance, loans that were modified during the three and nine months ended September 30, 2020 whose modifications met criteria outlined in either the CARES Act or revised intreragency statement were not accounted for as a TDR and have been excluded from the disclosures below. On September 30, 2020 and December 31, 2019, FHN had $321.4 and $206.3 million of portfolio loans classified as TDRs, respectively. For TDRs in the loan portfolio, FHN had loan loss reserves of $12.6 million, or 4% as of September 30, 2020, and $19.7 million, or 10% as of December 31, 2019. Additionally, $44.1 million and $51.1 million of loans held for sale as of September 30, 2020 and December 31, 2019, respectively, were classified as TDRs. The following tables present the end of period balance for loans modified in a TDR during the periods indicated: Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 (Dollars in thousands) Number Pre-Modification Post-Modification Number Pre-Modification Post-Modification Commercial, financial, and industrial: C&I 83 $ 130,281 $ 119,591 87 $ 140,857 $ 128,723 Total commercial and industrial 83 130,281 119,591 87 140,857 128,723 Commercial real estate: CRE 14 11,848 11,825 14 11,848 11,825 Total commercial real estate 14 11,848 11,825 14 11,848 11,825 Consumer real estate: HELOC 35 2,623 2,584 47 3,687 3,626 R/E installment loans 44 6,075 6,022 94 15,379 15,260 Total consumer real estate 79 8,698 8,606 141 19,066 18,886 Credit card and other 10 80 76 50 334 313 Total troubled debt restructurings 186 $ 150,907 $ 140,098 292 $ 172,105 $ 159,747 Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 (Dollars in thousands) Number Pre-Modification Post-Modification Number Pre-Modification Post-Modification Commercial, financial, and industrial: C&I 1 $ 62 $ 59 4 $ 14,179 $ 14,101 Total commercial and industrial 1 62 59 4 14,179 14,101 Consumer real estate: HELOC 13 1,638 1,631 57 7,013 6,950 R/E installment loans 16 1,771 1,854 82 10,730 10,790 Total consumer real estate 29 3,409 3,485 139 17,743 17,740 Credit card and other 35 134 126 68 317 300 Total troubled debt restructurings 65 $ 3,605 $ 3,670 211 $ 32,239 $ 32,141 The following tables present TDRs which re-defaulted during the three and nine months ended September 30, 2020 and 2019, a nd 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, 2020 Nine Months Ended September 30, 2020 (Dollars in thousands) Number Recorded Number Recorded Commercial (C&I): General C&I — $ — — $ — Total commercial (C&I) — — — — Consumer real estate: HELOC 1 32 8 34 R/E installment loans 6 839 16 841 Total consumer real estate 7 871 24 875 Credit card & other 7 24 21 24 Total troubled debt restructurings 14 $ 895 45 $ 899 Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 (Dollars in thousands) Number Recorded Number Recorded Commercial (C&I): General C&I — $ — — $ — Total commercial (C&I) — — — — Consumer real estate: HELOC 2 99 4 198 R/E installment loans 1 7 2 45 Total consumer real estate 3 106 6 243 Credit card & other 8 45 23 77 Total troubled debt restructurings 11 $ 151 29 $ 320 Loans Acquired with Deteriorated Credit Quality Upon FHN's adoption of CECL, purchased credit deteriorated ("PCD") loans are recorded at an initial amortized cost, which is the sum of the purchase price and the estimated credit losses recorded in the ALLL. Subsequent to this initial recognition, PCD loans are accounted for under the same methodology as non-PCD loans. As discussed in Note 2, on July 1, 2020, FHN and IBKC closed their merger-of-equals transaction. On July 17, 2020, First Horizon Bank completed its purchase of 30 branches from Truist Bank. In connection with these transactions, FHN acquired approximately $25.9 billion in loans from IBKC and purchased approximately $423.4 million of branch loans from Truist Bank. For PCD loans acquired or purchased during the third quarter of 2020, a reconciliation of the unpaid principal balance, contractual cash flow owed to FHN at acquisition date, and purchase price is presented in the following table. Three Months Ended September 30, 2020 (Dollars in thousands) C&I CRE Consumer Real Estate Credit Card and Other Total Par value (UPB) $ 4,074,927 $ 6,435,556 $ 2,393,677 $ 192,980 $ 13,097,140 Allowance for Loan Losses (a) (137,702) (100,123) (44,141) (4,845) (286,811) (Discount) Premium (64,328) 3,485 (31,764) (3) (92,610) Purchase Price $ 3,872,897 $ 6,338,918 $ 2,317,772 $ 188,132 $ 12,717,719 Purchased Credit-Impaired Loans Before the adoption of CECL on January 1, 2020, FHN applied the guidance in ASC 310-30 to loans that were identified as PCI loans at the acquisition date. The following table presents a rollforward of the accretable yield for the year ended December 31, 2019: Year Ended (Dollars in thousands) 2019 Balance, beginning of period $ 13,375 Accretion (5,792) Adjustment for payoffs (2,438) Adjustment for charge-offs (479) Adjustment for pool excess recovery (a) — Increase in accretable yield (b) 5,513 Disposals (4) Other (367) Balance, end of period $ 9,808 (a) Represents the removal of accretable difference for the remaining loans in a pool which is now in a recovery state. (b) Includes changes in the accretable yield due to both transfers from the nonaccretable difference and the impact of changes in the expected timing of the cash flows. At December 31, 2019, the ALLL related to PCI loans was $2.0 million. Net charge-offs related to PCI loans during 2019 were $5.8 million. The loan loss provision expense related to PCI loans during 2019 was $1.3 million. The following table reflects the outstanding principal balance and carrying amounts of the acquired PCI loans as of December 31, 2019: December 31, 2019 (Dollars in thousands) Carrying value Unpaid balance Commercial, financial and industrial $ 24,973 $ 25,938 Commercial real estate 5,078 5,466 Consumer real estate 23,681 26,245 Credit card and other 489 567 Total $ 54,221 $ 58,216 Impaired Loans The following tables provide additional disclosures previously required by ASC Topic 310 related to FHN's December 31, 2019 balances. Information on impaired loans at December 31, 2019 was as follows: December 31, 2019 (Dollars in thousands) Recorded Unpaid Related Impaired loans with no related allowance recorded: Commercial: C&I $ 52,672 $ 63,602 $ — CRE 1,563 1,563 — Total $ 54,235 $ 65,165 $ — Consumer: HELOC (a) $ 4,940 $ 10,438 $ — R/E installment loans (a) 7,593 10,054 — Total $ 12,533 $ 20,492 $ — Impaired loans with related allowance recorded: Commercial: C&I $ 29,766 $ 31,536 $ 6,196 CRE — — — Total $ 29,766 $ 31,536 $ 6,196 Consumer: HELOC $ 55,522 $ 59,122 $ 7,016 R/E installment loans 94,191 104,121 12,282 Credit card & other 653 653 422 Total $ 150,366 $ 163,896 $ 19,720 Total commercial $ 84,001 $ 96,701 $ 6,196 Total consumer $ 162,899 $ 184,388 $ 19,720 Total impaired loans $ 246,900 $ 281,089 $ 25,916 (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 2019 2019 (Dollars in thousands) Average Interest Average Interest Impaired loans with no related allowance recorded: Commercial: C&I $ 64,558 $ 173 $ 62,553 $ 530 Loans to mortgage companies 18,628 — 12,419 — CRE 1,690 3 1,576 30 Total $ 84,876 $ 176 $ 76,548 $ 560 Consumer: HELOC (a) $ 6,495 $ — $ 6,852 $ — R/E installment loans (a) 8,147 — 8,564 — Total $ 14,642 $ — $ 15,416 $ — Impaired loans with related allowance recorded: Commercial: C&I $ 14,620 $ 4 $ 10,892 $ 4 TRUPS 2,750 — 2,806 — CRE 169 — 294 9 Total $ 17,539 $ 4 $ 13,992 $ 13 Consumer: HELOC $ 60,312 $ 449 $ 62,650 $ 1,475 R/E installment loans 102,576 787 106,175 2,424 Credit card & other 710 4 697 13 Total $ 163,598 $ 1,240 $ 169,522 $ 3,912 Total commercial $ 102,415 $ 180 $ 90,540 $ 573 Total consumer $ 178,240 $ 1,240 $ 184,938 $ 3,912 Total impaired loans $ 280,655 $ 1,420 $ 275,478 $ 4,485 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance.

Allowance for Credit Losses

Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses Management's estimate of expected credit losses in the loan and lease portfolios is recorded in the ALLL and the reserve for unfunded lending commitments ("RULC"), collectively the allowance for credit losses ("ACL"). The ALLL and the RULC are reported on the Consolidated Balance Sheets in the Allowance for loan and lease losses and in Other liabilities, respectively. Provision for credit losses related to the loans and leases portfolio and the unfunded lending commitments are reported in the Consolidated Statements of Income as Provision for credit losses. As discussed in Note 1 - Financial Information, FHN adopted ASU 2016-13 effective January 1, 2020. Financial information at September 30, 2020 reflects this adoption and historical financial information disclosed is in accordance with previously applicable GAAP. Allowance for Loan and Lease Losses The ALLL has been determined in accordance with ASC 326-20, which requires a recognition of current expected credit losses on the amortized cost basis of loans. During the first nine months of 2020, expected credit loss estimates were adversely affected across all portfolio segments due to the steep decline in macroeconomic forecasts due to the actual and projected effects of the COVID-19 pandemic. To a lesser extent, loan growth also resulted in a higher ALLL as those increased balances received a full life-of-loan allowance based on current macroeconomic projections. For all portfolio segments, FHN has selected a 4-year reasonable and supportable forecast period which reflects a 3-year period during which macroeconomic variables are used to estimate expected credit losses. This is followed by a 1-year, time-weighted reversion to historical loss factors with weights assigned to macroeconomic variables diminishing, and weights assigned to historical loss averages increasing, pro rata as months lapse during the 1-year period. Thereafter, FHN immediately reverts to historical loss averages over the remaining estimated life of loans. In developing credit loss estimates for its loan portfolio, FHN evaluated multiple macroeconomic forecasts provided by Moody’s. FHN selected Moody’s baseline forecast as the primary source for its macroeconomic inputs, which are inclusive of the following assumptions related to the economic effects of the COVID-19 pandemic: • Unemployment peak at 13% in 2Q20, with a baseline forecast of 9.5% for 4Q20 and dropping to 8.1% for 4Q21 • Annualized GDP growth rate of 2.8% in 4Q20 • V-shaped recovery for housing and some portions of consumer spending • Fed funds rate near zero for at least the next two years. Where macroeconomic forecast variables used in the models do not take into effect the impact of federal stimulus and bank-supported payment deferral and forbearance programs on the timing of grade migration and recognition of loss content, management adjusted model inputs qualitatively to account for this assistance. During the nine months ended September 30, 2020, FHN also utilized targeted reviews of higher stressed loan portfolio (industries) that are most exposed to the effects of the COVID-19 pandemic, including Franchise Finance, Energy, Non-Profit, Arts & Entertainment, Restaurants outside of Franchise Finance, Nursing/Assisted Living and Hospitality within the C&I segment and CRE-Hospitality and CRE-Retail within the Commercial Real Estate segment. This analysis reviewed the level of impact from COVID-19 and the likelihood of additional financial assistance needed beyond 180 days. This analysis was utilized in developing qualitative adjustments to increase the recorded ALLL attributable to these components beyond the modeled results. FHN reviewed consumer deferrals and forbearance payment rates to analyze the likelihood customers will have difficulty making payments after the deferral or forbearance period ends. The analysis was utilized to develop an additional qualitative adjustment to increase the recorded ALLL for consumer real estate loans. Management also made qualitative adjustments to reflect estimated recoveries based on a review of prior charge off and recovery levels, for default risk associated with large balances with individual borrowers, for estimated loss amounts not reflected in historical factors due to specific portfolio risk and for instances where limited data for acquired loans is considered to affect modeled results. Typically commercial loans in C&I and CRE have shorter expected lives, based on the contractual term of loan agreements, prepayment estimates and a limited amount of renewal or extension options that are not unconditionally cancellable by FHN. Estimated weighted average lives are normally under 3 years. TRUPs loans are an exception due to longer contractual lives, beneficial borrower terms and balloon payoff structure. Consumer HELOC and installment loans tend to have significantly longer lives based on their contractual terms which is reduced somewhat by estimated prepayments with estimated weighted average lives normally 5 years or less. Credit card loans have shorter estimated lives approximating 1 year based on customer payment trends and because the revolving lines are unconditionally cancellable by FHN. Reserve for Unfunded Lending Commitments The measurement of expected credit losses for unfunded commitments mirrors that of loans with the additional estimate of future draw rates (timing and amount). Consistent with the ALLL, the decline in macroeconomic forecasts during the first nine months of 2020 resulted in higher credit expense for unfunded commitments. Excluding the acquired reserve for unfunded commitments, there was no significant change during the third quarter of 2020. Periods prior to 2020 The ALLL included the following components: reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer loans, both determined in accordance with ASC 450-20-50, and to a lesser extent, reserves determined in accordance with ASC 310-10-35 for loans determined by management to be individually impaired and an allowance associated with PCI loans. The following table provides a rollforward of the ALLL and RULC by portfolio type for the three and nine months ended September 30, 2020 and 2019: (Dollars in thousands) Commercial, Financial, and Industrial (a) Commercial Real Estate Consumer Real Estate Credit Card and Other Total Allowance for loan and lease losses: Balance as of July 1, 2020 $ 318,722 $ 57,285 $ 143,757 $ 18,117 $ 537,881 Charge-offs (b) (69,448) (3,540) (1,834) (3,519) (78,341) Recoveries 3,200 2,243 5,311 997 11,751 Initial allowance on loans purchased with credit deterioration (b) 137,702 100,123 44,141 4,845 286,811 Provision for loan and lease losses (c) 98,918 51,847 74,055 5,180 230,000 Balance as of September 30, 2020 489,094 207,958 265,430 25,620 988,102 Reserve for remaining unfunded commitments: Balance as of July 1, 2020 36,388 6,359 7,714 — 50,461 Initial reserve on loans acquired 11,760 26,306 3,185 8 41,259 Provision/(provision credit) for remaining unfunded commitments (1,509) (1,671) 180 — (3,000) Balance as of September 30, 2020 46,639 30,994 11,079 8 88,720 Allowance for loan and lease losses: Balance as of January 1, 2020 122,486 36,112 28,443 13,266 200,307 Adoption of ASU 2016-13 18,782 (7,348) 92,992 1,968 106,394 Balance as of January 1, 2020, as adjusted 141,268 28,764 121,435 15,234 306,701 Charge-offs (b) (94,400) (4,182) (6,112) (10,007) (114,701) Recoveries 5,208 2,972 12,853 3,258 24,291 Initial allowance on loans purchased with credit deterioration (b) 137,702 100,123 44,141 4,845 286,811 Provision for loan and lease losses (c) 299,316 80,281 93,113 12,290 485,000 Balance as of September 30, 2020 $ 489,094 $ 207,958 $ 265,430 $ 25,620 $ 988,102 Reserve for remaining unfunded commitments: Balance as of January 1, 2020 3,590 2,356 16 139 6,101 Adoption of ASU 2016-13 16,512 1,276 6,323 (139) 23,972 Balance as of January 1, 2020, as adjusted 20,102 3,632 6,339 — 30,073 Initial reserve on loans acquired 11,760 26,306 3,185 8 41,259 Provision for remaining unfunded commitments 14,777 1,056 1,555 — 17,388 Balance as of September 30, 2020 $ 46,639 $ 30,994 $ 11,079 $ 8 $ 88,720 Allowance for loan losses: Balance as of July 1, 2019 $ 116,096 $ 32,953 $ 31,532 $ 12,168 $ 192,749 Charge-offs (18,598) (369) (1,473) (3,897) (24,337) Recoveries 3,245 181 5,055 1,256 9,737 Provision/(provision credit) for loan losses 13,387 2,860 (4,440) 3,193 15,000 Balance as of September 30, 2019 114,130 35,625 30,674 12,720 193,149 Reserve for remaining unfunded commitments: Balance as of July 1, 2019 4,231 3,149 20 125 7,525 Provision/(provision credit) for remaining unfunded commitments (406) (231) (5) 7 (635) Balance as of September 30, 2019 3,825 2,918 15 132 6,890 Allowance for loan losses: Balance as of January 1, 2019 98,947 31,311 37,439 12,727 180,424 Charge-offs (28,289) (924) (5,991) (11,883) (47,087) Recoveries 4,593 150 14,621 3,448 22,812 Provision/(provision credit) for loan losses 38,879 5,088 (15,395) 8,428 37,000 Balance as of September 30, 2019 114,130 35,625 30,674 12,720 193,149 Reserve for remaining unfunded commitments: Balance as of January 1, 2019 4,240 3,242 27 109 7,618 Provision/(provision credit) for remaining unfunded commitments (415) (324) (12) 23 (728) Balance as of September 30, 2019 $ 3,825 $ 2,918 $ 15 $ 132 $ 6,890 (a) C&I loans as of September 30, 2020 include $4.2 billion in PPP loans which due to the government guarantee and forgiveness provisions are considered to have no credit risk and therefore have no allowance for loan and lease losses. (b) The three and nine month periods ended September 30, 2020 exclude day 1 charge-offs and the related initial allowance on PCD loans is net of these amounts. Under the new CECL standard, the initial ALLL recognized on PCD assets included an additional $237.3 million for charged-off loans that had been written off prior to acquisition (whether full or partial) or which met FHN's charge-off policy at the time of acquisition. After charging these amounts off immediately upon acquisition, the net impact was 286.8 million of additional ALLL for PCD loans. (c) Provision for loan and lease losses for the three and nine month periods ended September 30, 2020 includes $147.0 million recognized on non-PCD loans from the IBKC merger and Truist branch acquisition. In accordance with its accounting policy elections, FHN does not recognize a separate allowance for expected credit losses for AIR and records reversals of AIR as reductions of interest income. FHN reverses previously accrued but uncollected interest when an asset is placed on nonaccrual status. As of September 30, 2020, FHN recognized approximately $1.1 million in allowance for expected credit losses on COVID-19 deferrals that do not qualify for the election which is not reflected in the table above. AIR and the related allowance for expected credit losses is included as a component of other assets. The total amount of interest reversals from loans placed on nonaccrual status during the three and nine months ended September 30, 2020 was not material. In addition, the amount of income recognized on nonaccrual loans for the three and nine months ended in September 30, 2020 was not material.

Mortgage Banking Activity

Mortgage Banking Activity	9 Months Ended
	Sep. 30, 2020
Mortgage Banking [Abstract]
Mortgage Banking Activities	Mortgage Banking Activity FHN originates mortgage loans for sale into the secondary market. The loans originated for sale primarily consist of residential first mortgages that conform to standards established by the government-sponsored entities ("GSEs") that are major investors in U.S. home mortgages, but can also consist of junior lien loans secured by residential property. These loans are primarily sold to private companies that are unaffiliated with the GSEs on a servicing-released basis. Mortgage Servicing Rights Effective with the IBKC merger, FHN made an election to record mortgage servicing rights at the lower of cost or market value and amortize over the remaining servicing life of the loans, with consideration given to prepayment assumptions. Mortgage servicing rights are included in Other assets on the Consolidated Balance Sheets. Mortgage servicing rights had the following carrying values as of the period indicated. September 30, 2020 (Dollars in thousands) Gross Carrying Amount Valuation Allowance Accumulated Amortization Net Carrying Amount Mortgage servicing rights 22,142 (61) (1,413) 20,668 In addition, there was an insignificant amount of non-mortgage and commercial servicing rights as of September 30, 2020 and December 31, 2019.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Gross goodwill, accumulated impairments, and accumulated divestiture related write-offs were determined beginning January 1, 2002, when a change in accounting requirements resulted in goodwill being assessed for impairment rather than being amortized. Gross goodwill of $200.0 million with accumulated impairments and accumulated divestiture-related write-offs of $114.1 million and $85.9 million, respectively, were previously allocated to the non-strategic segment, resulting in $0 net goodwill allocated to the non-strategic segment as of September 30, 2020 and December 31, 2019. The regional banking and fixed income segments do not have any accumulated impairments or divestiture related write-offs. On July 1, 2020, FHN completed its merger-of-equals transaction with IBERIABANK Corporation. In connection with the merger, FHN recorded a $532.2 million purchase accounting gain, based on preliminary fair value estimates. On July 17, 2020, FHN completed its purchase of 30 branches from Truist Bank. In relation to the acquisition, FHN recorded $77.6 million in goodwill, based on preliminary fair value estimates. See Note 2 - Acquisitions and Divestitures for additional information regarding these transactions. FHN performed the required annual goodwill impairment test as of October 1, 2019. The annual impairment test did not indicate impairment in any of FHN’s reporting units as of the testing date. Following the testing date, management evaluated the events and circumstances that could indicate that goodwill might be impaired and concluded that a subsequent interim test was not necessary. FHN is currently in the process of performing its annual impairment test as of October 1, 2020. The following is a summary of goodwill by reportable segment included in the Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019. (Dollars in thousands) Regional Fixed Total December 31, 2018 $ 1,289,819 $ 142,968 $ 1,432,787 Additions — — — September 30, 2019 $ 1,289,819 $ 142,968 $ 1,432,787 December 31, 2019 $ 1,289,819 $ 142,968 $ 1,432,787 Additions 77,644 — 77,644 September 30, 2020 $ 1,367,463 $ 142,968 $ 1,510,431 Intangible assets subject to amortization In connection with the IBKC merger and the Truist branch acquisition, FHN recorded $206.7 million and $7.0 million of core deposit intangible assets, respectively. Core deposit intangible assets are subject to amortization over a ten years period. In connection with the IBKC merger, FHN recorded $14.0 million of customer relationship intangible assets, $10.3 million of purchased credit card intangible assets, and $6.8 million of title plant related to title company operations. The following table, which excludes fully amortized intangibles, presents other intangible assets included in the Consolidated Balance Sheets: September 30, 2020 December 31, 2019 (Dollars in thousands) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Core deposit intangibles $ 370,850 $ (68,902) $ 301,948 $ 157,150 $ (47,372) $ 109,778 Customer relationships 37,000 (7,037) 29,963 77,865 (60,150) 17,715 Other (a) 38,685 (4,896) 33,789 5,622 (2,915) 2,707 Total $ 446,535 $ (80,835) $ 365,700 $ 240,637 $ (110,437) $ 130,200 (a) Includes noncompete covenants, purchased credit card intangible assets, and state banking licenses not subject to amortization. Amortization expense was $14.6 million and $6.2 million for the three months ended September 30, 2020 and 2019, respectively and $25.2 million and $18.6 million for nine months ended September 30, 2020 and 2019, respectively. As of September 30, 2020 the estimated aggregated amortization expense is expected to be: (Dollars in thousands) Year Amortization Remainder of 2020 $ 14,921 2021 55,943 2022 51,498 2023 47,859 2024 44,040 2025 37,145

Preferred Stock

Preferred Stock	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Preferred Stock	Preferred Stock At September 30, 2020, FHN had issued and outstanding shares of non-cumulative perpetual preferred stock in five Series, designated A, B, C, D, and E. For each Series, FHN caused depositary shares to be issued, each of which represents a fractional ownership interest in a share of the related Series of preferred stock. Series A was issued in 2013, while the other four Series were issued in 2020. Series B, C, and D were issued on July 2, 2020 as substitutes for corresponding series of IBKC preferred stock. Series E was issued and sold on May 28, 2020 for net proceeds of approximately $145 million. • Series A. FHN’s Series A preferred stock consists of 1,000 shares authorized, with 1,000 outstanding shares having an aggregate liquidation preference amount of $100 million. Dividends will accrue and be payable on the Series A Preferred Stock, if declared by FHN's Board of Directors, and will be paid quarterly, in arrears, at an annual rate of 6.200%. • Series B. FHN’s Series B preferred stock consists of 8,625 shares authorized, with 8,000 outstanding shares having an aggregate liquidation preference amount of $80 million. Dividends will accrue and be payable on the Series B preferred stock, if declared by FHN's Board of Directors, and (i) will be paid semi-annually, in arrears, at an annual rate equal to 6.625% for each period from, and including, February 1, 2020 to, but excluding, August 1, 2025 and (ii) will be paid quarterly, in arrears, at an annual rate equal to three-month LIBOR plus 4.262% for each period beginning on or after August 1, 2025. • Series C. FHN’s Series C preferred stock consists of 5,750 shares authorized, with 5,750 outstanding shares having an aggregate liquidation preference amount of $57.5 million. Dividends will accrue and be payable on the Series C preferred stock, if declared by FHN's Board of Directors, and will be paid quarterly, in arrears, at an annual rate equal to (i) 6.600% for each period from, and including, May 1, 2020 to, but excluding, May 1, 2026 and (ii) three-month LIBOR plus 4.920% for each period beginning on or after May 1, 2026. • Series D. FHN’s Series D preferred stock consists of 10,000 shares authorized, with 10,000 outstanding shares having an aggregate liquidation preference amount of $100 million. Dividends will accrue and be payable on the Series D preferred stock, if declared by the FHN's Board of Directors, and (i) will be paid semi-annually, in arrears, at an annual rate equal to 6.100% for each period from, and including May 1, 2020 to, but excluding, May 1, 2024 and (ii) will be paid quarterly, in arrears, at an annual rate equal to three-month LIBOR plus 3.859% for each period on or after May 1, 2024. • Series E. FHN’s Series E preferred stock consists of 1,725 shares authorized, with 1,500 outstanding shares having an aggregate liquidation preference amount of $150 million. Dividends will accrue and be payable on the Series E Preferred Stock, if declared by FHN's Board of Directors, and will be paid quarterly, in arrears, at an annual rate of 6.500%. Excluding the Series D preferred stock, the preferred stock qualifies as Tier 1 Capital for FHN. No Series of preferred stock has any stated maturity and redemption is solely at the option of FHN. Under current rules, any redemption of the preferred stock is subject to prior approval of the FRB. The following table presents a summary of FHN's non-cumulative perpetual preferred stock: September 30, 2020 December 31, 2019 (dollars in thousands) Issuance Date Earliest Redemption Date* Annual Dividend Rate Liquidation Amount Carrying Amount Carrying Amount Series A Preferred Stock 1/31/2013 4/10/2018 6.200 % $ 100,000 $ 95,624 $ 95,624 Series B Preferred Stock 7/2/2020 8/1/2025 6.625 % 80,000 77,348 — Series C Preferred Stock 7/2/2020 5/1/2026 6.600 % 57,500 59,084 — Series D Preferred Stock 7/2/2020 5/1/2024 6.100 % 100,000 93,649 — Series E Preferred Stock 5/28/2020 10/10/2025 6.500 % 150,000 144,665 — $ 487,500 $ 470,370 $ 95,624 *Denotes earliest optional redemption date. Earlier redemption is possible, at FHN's election, if certain regulatory capital events occur.

Components of Other Comprehensi

Components of Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Other Comprehensive Income (Loss)	Components of Other Comprehensive Income (Loss) The following table provides the changes in accumulated other comprehensive income (loss) by component, net of tax, for the three and nine months ended September 30, 2020 and 2019: (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of July 1, 2020 $ 118,327 $ 16,305 $ (269,430) $ (134,798) Net unrealized gains (losses) (6,121) (805) (141) (7,067) Amounts reclassified from AOCI 1,003 (2,128) 2,520 1,395 Other comprehensive income (loss) (5,118) (2,933) 2,379 (5,672) Balance as of September 30, 2020 $ 113,209 $ 13,372 $ (267,051) $ (140,470) Balance as of January 1, 2020 $ 31,079 $ 3,227 $ (273,914) $ (239,608) Net unrealized gains (losses) 81,127 13,998 (163) 94,962 Amounts reclassified from AOCI 1,003 (3,853) 7,026 4,176 Other comprehensive income (loss) 82,130 10,145 6,863 99,138 Balance as of September 30, 2020 $ 113,209 $ 13,372 $ (267,051) $ (140,470) (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of July 1, 2019 $ 21,071 $ 2,184 $ (285,744) $ (262,489) Net unrealized gains (losses) 16,889 1,855 — 18,744 Amounts reclassified from AOCI — 989 2,102 3,091 Other comprehensive income (loss) 16,889 2,844 2,102 21,835 Balance as of September 30, 2019 $ 37,960 $ 5,028 $ (283,642) $ (240,654) Balance as of January 1, 2019 $ (75,736) $ (12,112) $ (288,768) $ (376,616) Net unrealized gains (losses) 113,495 13,367 — 126,862 Amounts reclassified from AOCI 201 3,773 5,126 9,100 Other comprehensive income (loss) 113,696 17,140 5,126 135,962 Balance as of September 30, 2019 $ 37,960 $ 5,028 $ (283,642) $ (240,654) Reclassifications from AOCI, and related tax effects, were as follows: (Dollars in thousands) Three Months Ended Nine Months Ended Details about AOCI 2020 2019 2020 2019 Affected line item in the statement where net income is presented Securities AFS: Realized (gains) losses on securities AFS $ 1,323 $ — $ 1,323 $ 267 Securities gains (losses), net Tax expense (benefit) (320) — (320) (66) Provision (benefit) for income taxes 1,003 — 1,003 201 Cash flow hedges: Realized (gains) losses on cash flow hedges (2,807) 1,313 (5,084) 5,012 Interest and fees on loans and leases Tax expense (benefit) 679 (324) 1,231 (1,239) Provision (benefit) for income taxes (2,128) 989 (3,853) 3,773 Pension and Postretirement Plans: Amortization of prior service cost and net actuarial gain (loss) 3,325 2,792 9,270 6,809 All other expense Tax expense (benefit) (805) (690) (2,244) (1,683) Provision (benefit) for income taxes 2,520 2,102 7,026 5,126 Total reclassification from AOCI $ 1,395 $ 3,091 $ 4,176 $ 9,100

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2020
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) 2020 2019 2020 2019 Net income $ 539,038 $ 113,943 $ 612,175 $ 331,090 Net income attributable to noncontrolling interest 2,977 2,883 8,680 8,555 Net income attributable to controlling interest 536,061 111,060 603,495 322,535 Preferred stock dividends 12,722 1,550 15,822 4,650 Net income available to common shareholders $ 523,339 $ 109,510 $ 587,673 $ 317,885 Weighted average common shares outstanding—basic 549,690 311,888 391,699 314,442 Effect of dilutive securities 1,156 1,917 1,014 1,959 Weighted average common shares outstanding—diluted 550,846 313,805 392,713 316,401 Net income per share available to common shareholders $ 0.95 $ 0.35 $ 1.50 $ 1.01 Diluted income per share available to common shareholders $ 0.95 $ 0.35 $ 1.50 $ 1.00 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) 2020 2019 2020 2019 Stock options excluded from the calculation of diluted EPS 8,306 1,883 4,564 2,413 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 15.32 $ 21.21 $ 17.05 $ 21.36 Other equity awards excluded from the calculation of diluted EPS 6,824 2,094 4,826 1,815

Contingencies And Other Disclos

Contingencies And Other Disclosures	9 Months Ended
	Sep. 30, 2020
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 most times, and FHN generally cooperates when those matters arise. Pending and threatened litigation matters sometimes are settled by the parties, and sometimes pending matters are resolved in court or before an arbitrator, or are withdrawn. 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 types of matters are discussed relating to FHN’s pre-2009 mortgage origination and servicing businesses. In all litigation matters discussed, unless settled or otherwise resolved, FHN believes it has meritorious defenses and intends to pursue those defenses vigorously. FHN reassesses the liability for litigation matters each quarter as the matters progress. At September 30, 2020, the aggregate amount of liabilities established for all such loss contingency matters was $1.3 million. These liabilities are separate from those discussed under the heading “Loan Repurchase and Foreclosure Liability” below. In each material loss contingency matter, except as otherwise noted, there is more than a remote chance that any of the following outcomes will occur: the plaintiff will substantially prevail; the defense will substantially prevail; the plaintiff will prevail in part; or the matter will be settled by the parties. At September 30, 2020, FHN is unable to estimate any material reasonably possible loss ("RPL") for contingency matters in future periods in excess of currently established liabilities. As a result of the general uncertainties discussed above and the specific uncertainties discussed for each matter mentioned below, it is possible that the ultimate future loss experienced by FHN for any particular matter may materially exceed the amount, if any, of currently established liability for that matter. Material Matters In the first quarter of 2020, a former shareholder of Capital Bank Financial Corp. ("CBF") filed a putative class action suit, Searles v. DeMartini et al, No. 2020-0136 (Del. Chancery), against certain former directors, officers, and shareholders of CBF, alleging, among other things, that defendants breached certain fiduciary duties in connection with CBF's merger with FHN in 2017. Plaintiff claims unspecified damages related to the merger consideration and opportunity loss. FHN is unable to estimate an RPL range for this matter due to significant uncertainties regarding: whether a class will be certified and, if so, the composition of the class; the amount of potential damages that might be awarded, if any; of any such damages amount, the amount that FHN would be obliged to indemnify; the availability of applicable insurance; and the outcome of discovery, which has not yet begun. Exposures from pre-2009 Mortgage Business FHN is contending with indemnification claims related to "other whole loans sold," which were mortgage loans originated by FHN before 2009 and sold outside of an FHN securitization. These claims generally assert that FHN-originated loans contributed to losses in connection with mortgage loans securitized by the buyer of the loans. The claims generally do not include specific deficiencies for specific loans sold by FHN. Instead, the claims generally assert that FHN is liable for a share of the claimant's loss estimated by assessing the totality of the other whole loans sold by FHN to claimant in relation to the totality of the larger number of loans securitized by claimant. FHN is unable to estimate an RPL range for these matters due to significant uncertainties regarding: the number of, and the facts underlying, the loan originations which claimants assert are indemnifiable; the applicability of FHN’s contractual indemnity covenants to those facts and originations; and, in those cases where an indemnity claim may be supported, whether any legal defenses, counterclaims, other counter-positions, or third-party claims might eliminate or reduce claims against FHN or their impact on FHN. FHN also is contending with indemnification claims related to servicing obligations. The most significant is from Nationstar Mortgage LLC, currently doing business as “Mr. Cooper.” Nationstar was the purchaser of FHN’s mortgage servicing obligations and assets in 2013 and 2014 and was FHN’s subservicer. Nationstar asserts several categories of indemnity obligations in connection with mortgage loans under the subservicing arrangement and under the purchase transaction. This matter currently is not in litigation, but litigation in the future is possible. FHN is unable to estimate an RPL range for this matter due to significant uncertainties regarding: the exact nature of each of Nationstar’s claims and its position in respect of each; the number of, and the facts underlying, the claimed instances of indemnifiable events; the applicability of FHN’s contractual indemnity covenants to those facts and events; and, in those cases where the facts and events might support an indemnity claim, whether any legal defenses, counterclaims, other counter-positions, or third-party claims might eliminate or reduce claims against FHN or their impact on FHN. FHN has additional potential exposures related to its pre-2009 mortgage businesses. A few of those matters have become litigation which FHN currently estimates are immaterial, some are non-litigation claims or threats, some are mere subpoenas or other requests for information, and in some areas FHN has no indication of any active or threatened dispute. Some of those matters might eventually result in settlements, and some might eventually result in adverse litigation outcomes, but none are included in the material loss contingency liabilities mentioned above or in the RPL range mentioned above. Mortgage Loan Repurchase and Foreclosure Liability FHN’s repurchase and foreclosure liability is comprised of accruals to cover estimated loss content in the active pipeline (consisting of mortgage loan repurchase, make-whole, foreclosure/servicing demands and certain related exposures), estimated future inflows, and estimated loss content related to certain known claims not currently included in the active pipeline. FHN compares the estimated probable incurred losses determined under the applicable loss estimation approaches for the respective periods with current reserve levels. Changes in the estimated required liability levels are recorded as necessary through the repurchase and foreclosure provision. Based on currently available information and experience to date, FHN has evaluated its loan repurchase, make-whole, foreclosure, and certain related exposures and has accrued for losses of $15.9 million and $14.5 million as of September 30, 2020 and December 31, 2019, respectively. At September 30, 2020, a significant majority of the liability related to legacy FHN's pre-2009 mortgage business. Accrued liabilities for FHN’s estimate of these obligations are reflected in Other liabilities on the Consolidated Balance Sheets. Charges/expense reversals to increase/decrease the liability are included within Other income on the Consolidated Statements of Income. The estimates are based upon currently available information and fact patterns that exist as of each balance sheet date and could be subject to future changes. Changes to any one of these factors could significantly impact the estimate of FHN’s liability. OTHER DISCLOSURES Indemnification Agreements and Guarantees In the ordinary course of business, FHN enters into indemnification agreements for legal proceedings against its directors and officers and standard representations and warranties for underwriting agreements, merger and acquisition agreements, loan sales, contractual commitments, and various other business transactions or arrangements. The extent of FHN’s obligations under these agreements depends upon the occurrence of future events; therefore, it is not possible to estimate a maximum potential amount of payouts that could be required by such agreements.

Pension, Savings, And Other Emp

Pension, Savings, And Other Employee Benefits	9 Months Ended
	Sep. 30, 2020
Retirement Benefits, Description [Abstract]
Pension, Savings, and Other Employee Benefits	Pension, Savings, and Other Employee Benefits Pension plan. FHN sponsors a noncontributory, qualified defined benefit pension plan to employees hired or re-hired on or before September 1, 2007. Pension benefits are based on years of service, average compensation near retirement or other termination, and estimated social security benefits at age 65. Benefits under the plan are “frozen” so that years of service and compensation changes after 2012 do not affect the benefit owed. Minimum contributions are based upon actuarially determined amounts necessary to fund the total benefit obligation. Decisions to contribute to the plan are based upon pension funding requirements under the Pension Protection Act, the maximum amount deductible under the Internal Revenue Code, the actual performance of plan assets, and trends in the regulatory environment. FHN made no contributions to the qualified pension plan in 2019. Management does not currently anticipate that FHN will make a contribution to the qualified pension plan for the remainder of 2020. 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. FHN anticipates making benefit payments under the non-qualified plans of $5.2 million in 2020. Payments made under the non-qualified plans were $5.2 million for 2019. Savings plan. FHN provides all qualifying full-time employees with the opportunity to participate in FHN's tax qualifi ed 401(k) savings plan. The qualified plan allows employees to defer receipt of earned salary, up to tax law limits, on a tax- advantaged basis. Accounts, which are held in trust, may be invested in a wide range of mutual funds and in FHN common stock. Up to tax law limits, FHN provides a 100 percent match for the first 6 percent of salary deferred, with company matching contributions invested according to a participant’s current investment election. Through a non-qualified savings restoration plan, FHN provides a restorative benefit to certain highly-compensated employees who participate in the savings plan and whose contribution elections are capped by tax limitations. 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 Personnel expense in the Consolidated Statements of Income. All other components of net periodic benefit cost are included in Other expense. The components of net periodic benefit cost for the three months ended September 30 were as follows: Pension Benefits Other Benefits (Dollars in thousands) 2020 2019 2020 2019 Components of net periodic benefit cost Service cost $ 8 $ 7 $ 25 $ 23 Interest cost 5,844 7,505 304 358 Expected return on plan assets (7,000) (9,335) (325) (314) Amortization of unrecognized: Prior service cost (credit) — — 8 — Actuarial (gain) loss 3,381 2,546 (64) (112) Net periodic benefit cost (credit) $ 2,233 $ 723 $ (52) $ (45) The components of net periodic benefit cost for the nine months ended September 30 were as follows: Pension Benefits Other Benefits (Dollars in thousands) 2020 2019 2020 2019 Components of net periodic benefit cost Service cost $ 24 $ 23 $ 74 $ 71 Interest cost 17,663 22,655 915 1,060 Expected return on plan assets (19,337) (27,681) (947) (852) Amortization of unrecognized: Prior service cost (credit) — — 24 — Actuarial (gain) loss 9,829 7,416 (218) (346) Net periodic benefit cost (credit) $ 8,179 $ 2,413 $ (152) $ (67)

Business Segment Information

Business Segment Information	9 Months Ended
	Sep. 30, 2020
Segment Reporting, Measurement Disclosures [Abstract]
Business Segment Information	Business Segment Information FHN has four business segments: regional banking, fixed income, corporate, and non-strategic. The regional banking segment offers financial products and services, including traditional lending and deposit taking, to consumer and commercial customers in the southern and southeastern U.S. and other selected markets. Regional banking also provides investments, wealth management, financial planning, trust services and asset management, mortgage banking, title, credit card, and cash management services. Additionally, the regional banking segment includes correspondent banking which provides credit, depository, and other banking related services to other financial institutions nationally. The fixed income segment consists of fixed income securities sales, trading, underwriting, and strategies for institutional clients in the U.S. and abroad, as well as loan sales, portfolio advisory services, and derivative sales. The corporate segment consists of unallocated corporate expenses, expense on subordinated debt issuances, bank-owned life insurance, unallocated interest income associated with excess equity, net impact of raising incremental capital, revenue and expense associated with deferred compensation plans, funds management, tax credit investment activities, derivative valuation adjustments related to prior sales of Visa Class B shares, gain (loss) on extinguishment of debt, acquisition- and integration-related costs, expenses associated with rebranding initiatives, and various charges related to restructuring, repositioning, and efficiency efforts. The non-strategic segment consists of run-off consumer lending activities, pre-2009 mortgage banking elements, and the associated ancillary revenues and expenses related to these businesses. Non-strategic also includes the wind-down trust preferred loan portfolio and exited businesses. Periodically, FHN adapts its segments to reflect managerial or strategic changes. FHN may also modify its methodology of allocating expenses and equity among segments which could change historical segment results. Business segment revenue, expense, asset, and equity levels reflect those which are specifically identifiable or which are allocated based on an internal allocation method. Because the allocations are based on internally developed assignments and allocations, to an extent they are subjective. Generally, all assignments and allocations have been consistently applied for all periods presented. The following table reflects the amounts of consolidated revenue, expense, tax, and average assets for each segment for the three and nine months ended September 30: Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Consolidated Net interest income $ 532,365 $ 300,676 $ 1,140,511 $ 898,794 Provision for credit losses (a) 227,000 14,366 502,388 36,273 Noninterest income 822,923 171,735 1,203,948 470,773 Noninterest expense 587,040 308,306 1,210,139 904,883 Income before income taxes 541,248 149,739 631,932 428,411 Provision for income taxes 2,210 35,796 19,757 97,321 Net income $ 539,038 $ 113,943 $ 612,175 $ 331,090 Average assets $ 81,683,111 $ 41,940,901 $ 57,810,478 $ 41,359,574 (a) Increase in provision expense for the three and nine months ended September 30, 2020 is primarily due to provision related to non-PCD loans acquired in the IBKC merger and Truist branch acquisition and the economic forecast attributable to the COVID-19 pandemic. Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Regional Banking Net interest income $ 583,907 $ 302,467 $ 1,233,654 $ 885,932 Provision for credit losses 227,326 19,839 501,453 50,967 Noninterest income 172,457 85,930 333,669 240,555 Noninterest expense 373,680 193,956 768,870 586,697 Income before income taxes 155,358 174,602 297,000 488,823 Provision for income taxes 34,744 41,795 65,497 115,266 Net income $ 120,614 $ 132,807 $ 231,503 $ 373,557 Average assets $ 64,371,210 $ 31,632,768 $ 44,170,906 $ 30,231,372 Fixed Income Net interest income $ 11,632 $ 5,309 $ 36,088 $ 18,809 Noninterest income 110,783 77,808 319,741 197,238 Noninterest expense 67,395 67,582 231,488 173,656 Income before income taxes 55,020 15,535 124,341 42,391 Provision for income taxes 13,456 3,707 30,236 10,001 Net income $ 41,564 $ 11,828 $ 94,105 $ 32,390 Average assets $ 3,002,282 $ 2,882,478 $ 3,341,255 $ 2,952,925 Corporate Net interest income (expense) $ (69,187) $ (13,252) $ (145,847) $ (28,136) Noninterest income 539,668 7,359 548,891 30,112 Noninterest expense 142,894 42,297 199,461 139,052 Income (loss) before income taxes 327,587 (48,190) 203,583 (137,076) Provision (benefit) for income taxes (46,785) (11,632) (77,690) (36,416) Net income (loss) $ 374,372 $ (36,558) $ 281,273 $ (100,660) Average assets $ 13,595,544 $ 6,434,633 $ 9,527,471 $ 7,098,500 Non-Strategic Net interest income $ 6,013 $ 6,152 $ 16,616 $ 22,189 Provision/(provision credit) for loan losses (326) (5,473) 935 (14,694) Noninterest income 15 638 1,647 2,868 Noninterest expense 3,071 4,471 10,320 5,478 Income before income taxes 3,283 7,792 7,008 34,273 Provision for income taxes 795 1,926 1,714 8,470 Net income $ 2,488 $ 5,866 $ 5,294 $ 25,803 Average assets $ 714,075 $ 991,022 $ 770,846 $ 1,076,777 Certain previously reported amounts have been reclassified to agree with current presentation. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the three months ended September 30, 2020 and 2019: Three months ended September 30, 2020 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Fixed income (a) 380 110,563 — — 110,943 Mortgage banking and title income 65,569 — 23 (89) 65,503 Deposit transactions and cash management 40,500 — 1,528 28 42,056 Brokerage, management fees and commissions 19,595 — (1,704) — 17,891 Trust services and investment management 14,599 — (2,858) — 11,741 Bankcard income 10,150 — 277 30 10,457 Securities gains (losses), net (b) — — (1,170) — (1,170) Purchase accounting gain — — 532,150 — 532,150 Other income (c) 21,664 220 11,422 46 33,352 Total noninterest income $ 172,457 $ 110,783 $ 539,668 $ 15 $ 822,923 (a) Includes $9.9 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606. Three months ended September 30, 2019 (Dollars in thousands) Regional Banking Fixed Income Corporate Non- Strategic Consolidated Fixed income (a) 57 77,588 — — 77,645 Mortgage banking and title income 1,643 — — 376 2,019 Deposit transactions and cash management 32,624 — 1,721 34 34,379 Brokerage, management fees and commissions 14,157 — — — 14,157 Trust services and investment management 7,190 — (27) — 7,163 Bankcard income 7,030 11 63 (87) 7,017 Securities gains (losses), net (b) — — 97 — 97 Other income (c) 23,229 209 5,505 315 29,258 Total noninterest income $ 85,930 $ 77,808 $ 7,359 $ 638 $ 171,735 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Includes $9.2 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the nine months ended September 30, 2020 and 2019: Nine Months Ended September 30, 2020 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Fixed income (a) 582 318,417 — — 318,999 Deposit transactions and cash management 98,906 — 4,131 96 103,133 Mortgage banking and title income 71,168 — 23 881 72,072 Brokerage, management fees and commissions 48,799 — (1,703) — 47,096 Trust services and investment management 29,562 — (2,893) — 26,669 Bankcard income 23,853 — 421 88 24,362 Securities gains (losses), net (b) — — (2,638) — (2,638) Purchase accounting gain — — 532,150 — 532,150 Other income (c)(d) 60,799 1,324 19,400 582 82,105 Total noninterest income $ 333,669 $ 319,741 $ 548,891 $ 1,647 $ 1,203,948 (a) Includes $28.6 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606. (d) Corporate balance includes negative deferred compensation income driven by equity market valuations. Nine Months Ended September 30, 2019 (Dollars in thousands) Regional Banking Fixed Income Corporate Non- Strategic Consolidated Fixed income (a) 120 196,582 — 1,106 197,808 Mortgage banking and title income 5,119 — — 1,358 6,477 Deposit transactions and cash management 93,316 4 4,956 98 98,374 Brokerage, management fees and commissions 40,910 — — — 40,910 Trust services and investment management 22,148 — (71) — 22,077 Bankcard income 20,670 11 185 (542) 20,324 Securities gains (losses), net (b) — — 177 — 177 Purchase accounting gain — — — — — Other income (c)(d) 58,272 641 24,865 848 84,626 Total noninterest income $ 240,555 $ 197,238 $ 30,112 $ 2,868 $ 470,773 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Includes $23.6 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2020
Variable Interest Entities [Abstract]
Variable Interest Entities	Variable Interest Entities ASC 810 defines a VIE as a legal entity where (a) the equity investors, as a group, lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support, (b) the equity investors, as a group, lack either, (1) the power through voting rights, or similar rights, to direct the activities of an entity that most significantly impact the entity’s economic performance, (2) the obligation to absorb the expected losses of the entity, or (3) the right to receive the expected residual returns of the entity, or (c) the entity is structured with non-substantive voting rights. A variable interest is a contractual ownership or other interest that fluctuates with changes in the fair value of the VIE’s net assets exclusive of variable interests. Under ASC 810, as amended, a primary beneficiary is required to consolidate a VIE when it has a variable interest in a VIE that provides it with a controlling financial interest. For such purposes, the determination of whether a controlling financial interest exists is based on whether a single party has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could potentially be significant. Consolidated Variable Interest Entities 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 the carrying value of assets and liabilities associated with rabbi trusts used for deferred compensation plans which are consolidated by FHN as of September 30, 2020 and December 31, 2019: ( Dollars in thousands ) September 30, 2020 December 31, 2019 Assets: Other assets $ 154,783 $ 91,873 Total assets $ 154,783 $ 91,873 Liabilities: Other liabilities $ 131,782 $ 70,830 Total liabilities $ 131,782 $ 70,830 Nonconsolidated Variable Interest Entities Low Income Housing Partnerships. Through designated wholly-owned subsidiaries, First Horizon Bank, 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 the subsidiaries represent the holders of the equity investment at risk but do not have the ability to direct the activities that most significantly affect the performance of the entity through voting rights or similar rights. The subsidiaries could absorb losses that are significant to the LIHTC partnerships as they have a risk of loss for their 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 the subsidiaries’ 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 not material for the three or nine months ended September 30, 2020 and 2019. The following table summarizes the impact to the Provision (benefit) for income taxes on the Consolidated Statements of Income for the three and nine months ended September 30, 2020, and 2019 for LIHTC investments accounted for under the proportional amortization method. Three Months Ended Nine Months Ended ( Dollars in thousands ) 2020 2019 2020 2019 Provision (benefit) for income taxes: Amortization of qualifying LIHTC investments $ 8,273 $ 4,436 $ 19,586 $ 12,721 Low income housing tax credits (6,738) (3,607) (16,094) (10,758) Other tax benefits related to qualifying LIHTC investments (3,034) (1,751) (8,172) (4,970) Other Tax Credit Investments. Through designated subsidiaries, First Horizon Bank periodically makes equity investments 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 the 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 First Horizon Bank's subsidiaries represent the holders of the equity investment at risk but do not have the ability to direct the activities that most significantly affect the performance of the entity through voting rights or similar rights. While the subsidiaries could absorb losses that are significant to the NMTC LLCs as they have a risk of loss for their 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 the subsidiaries' initial capital contributions. First Horizon Bank 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 the subsidiaries represent the holders of the equity investment at risk but do not have the ability to direct the activities that most significantly affect the performance of the entity through voting rights or similar rights. The subsidiaries could absorb losses that are significant to the entities as they have a risk of loss for their 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 the subsidiaries’ initial capital contributions and funding commitments. Small Issuer Trust Preferred Holdings . First Horizon Bank holds variable interests in trusts which have issued mandatorily redeemable preferred capital securities (“trust preferreds”) for smaller banking and insurance enterprises. First Horizon Bank has no voting rights for the trusts’ activities. The trusts’ only assets are junior subordinated debentures of the issuing enterprises. The creditors of the trusts hold no recourse to the assets of First Horizon Bank. These trusts meet the definition of a VIE as the holders of the equity investment at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the trusts’ economic performance. Based on the nature of the trusts’ activities and the size of First Horizon Bank’s holdings, First Horizon Bank could potentially receive benefits or absorb losses that are significant to the trusts regardless of whether a majority of a trust’s securities are held by First Horizon Bank. However, since First Horizon Bank is solely a holder of the trusts’ securities, it has no rights which would give it the power to direct the activities that most significantly impact the trusts’ economic performance and thus it is not considered the primary beneficiary of the trusts. First Horizon Bank has no contractual requirements to provide financial support to the trusts. On-Balance Sheet Trust Preferred Securitization. In 2007, First Horizon Bank executed a securitization of certain small issuer trust preferreds for which the underlying trust meets the definition of a VIE as the holders of the equity investment at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entity’s economic performance. First Horizon Bank could potentially receive benefits or absorb losses that are significant to the trust based on the size and priority of the interests it retained in the securities issued by the trust. However, since First Horizon Bank did not retain servicing or other decision making rights, First Horizon Bank is not the primary beneficiary as it does not have the power to direct the activities that most significantly impact the trust’s economic performance. Accordingly, First Horizon Bank has accounted for the funds received through the securitization as a term borrowing in its Consolidated Balance Sheets. First Horizon Bank has no contractual requirements to provide financial support to the trust. Proprietary Residential Mortgage Securitizations. FHN holds variable interests (primarily principal-only strips) in proprietary residential mortgage securitization trusts it established prior to 2008 as a source of liquidity for its mortgage banking operations. Except for recourse due to breaches of representations and warranties made by FHN in connection with the sale of the loans to the trusts, the creditors of the trusts hold no recourse to the assets of FHN. Additionally, FHN has no contractual requirements to provide financial support to the trusts. Based on their restrictive nature, the trusts are considered VIEs as the holders of equity at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the trusts’ economic performance. However, FHN did not have the ability to participate in significant portions of a securitization trust’s cash flows and FHN was not considered the primary beneficiary of the trust. Therefore, these trusts were not consolidated by FHN. Holdings in Agency Mortgage-Backed Securities. FHN holds securities issued by various Agency securitization trusts. Based on their restrictive nature, the trusts meet the definition of a VIE since the holders of the equity investments at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entities’ economic performance. FHN could potentially receive benefits or absorb losses that are significant to the trusts based on the nature of the trusts’ activities and the size of FHN’s holdings. However, FHN is solely a holder of the trusts’ securities and does not have the power to direct the activities that most significantly impact the trusts’ economic performance, and is not considered the primary beneficiary of the trusts. FHN has no contractual requirements to provide financial support to the trusts. Commercial Loan Troubled Debt Restructurings. For certain troubled commercial loans, First Horizon Bank restructures the terms of the borrower’s debt in an effort to increase the probability of receipt of amounts contractually due. Following a troubled debt restructuring, the borrower entity typically meets the definition of a VIE as the initial determination of whether an entity is a VIE must be reconsidered as events have proven that the entity’s equity is not sufficient to permit it to finance its activities without additional subordinated financial support or a restructuring of the terms of its financing. As First Horizon Bank does not have the power to direct the activities that most significantly impact such troubled commercial borrowers’ operations, it is not considered the primary beneficiary even in situations where, based on the size of the financing provided, First Horizon Bank is exposed to potentially significant benefits and losses of the borrowing entity. First Horizon Bank has no contractual requirements to provide financial support to the borrowing entities beyond certain funding commitments established upon restructuring of the terms of the debt that allows for preparation of the underlying collateral for sale. Sale Leaseback Transaction . First Horizon Bank has entered into an agreement with a single asset leasing entity for the sale and leaseback of an office building. In conjunction with this transaction, First Horizon Bank loaned funds to a related party of the buyer that were used for the purchase price of the building. First Horizon Bank also entered into a construction loan agreement with the single asset entity for renovation of the building. Since this transaction did not qualify as a sale prior to 2019, it was accounted for using the deposit method which created a net asset or liability for all cash flows between First Horizon Bank and the buyer. Upon adoption of ASU 2016-02 the transaction qualified as a seller-financed sale-leaseback. The buyer-lessor in this transaction meets the definition of a VIE as it does not have sufficient equity at risk since First Horizon Bank is providing the funding for the purchase and renovation. A related party of the buyer-lessor has the power to direct the activities that most significantly impact the operations and could potentially receive benefits or absorb losses that are significant to the transactions, making it the primary beneficiary. Therefore, First Horizon Bank does not consolidate the leasing entity. Proprietary Trust Preferred Issuances . In conjunction with its acquisitions, FHN has acquired junior subordinated debt underlying multiple issuances of trust preferred debt. All of the trusts are considered VIEs because the ownership interests from the capital contributions to these trusts are not considered “at risk” in evaluating whether the holders of the equity investments at risk in the trusts have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entities’ economic performance. Thus, FHN cannot be the trusts’ primary beneficiary because its ownership interests in the trusts are not considered variable interests as they are not considered “at risk”. Consequently, none of the trusts are consolidated by FHN. The following table summarizes FHN’s nonconsolidated VIEs as of September 30, 2020: (Dollars in thousands) Maximum Liability Classification Type Low income housing partnerships $ 338,558 $ 166,931 (a) Other tax credit investments (b) 66,172 34,993 Other assets Small issuer trust preferred holdings (c) 209,442 — Loans and leases On-balance sheet trust preferred securitization 32,031 82,143 (d) Proprietary residential mortgage securitizations 471 — Trading securities Holdings of agency mortgage-backed securities (c) 7,386,169 — (e) Commercial loan troubled debt restructurings (f) 177,949 — Loans and leases Sale-leaseback transaction 17,993 — (g) Proprietary trust preferred issuances (h) — 287,124 Term borrowings (a) Maximum loss exposure represents $171.7 million of current investments and $166.9 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 2024. (b) Maximum loss exposure represents the value of current investments. (c) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (d) Includes $112.5 million classified as Loans and leases, and $1.7 million classified as Trading securities which are offset by $82.1 million classified as Term borrowings. (e) Includes $0.9 billion classified as Trading securities and $6.5 billion classified as Securities available for sale. (f) Maximum loss exposure represents $172.8 million of current receivables and contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring were $5.1 million. (g) Maximum loss exposure represents the current loan balance plus additional funding commitments. (h) No exposure to loss due to nature of FHN's involvement. The following table summarizes FHN’s nonconsolidated VIEs as of December 31, 2019: (Dollars in thousands) Maximum Liability Classification Type Low income housing partnerships $ 237,668 $ 136,404 (a) Other tax credit investments (b) (c) 6,282 — Other assets Small issuer trust preferred holdings (d) 238,397 — Loans and leases On-balance sheet trust preferred securitization 33,265 80,908 (e) Proprietary residential mortgage securitizations 941 — Trading securities Holdings of agency mortgage-backed securities (d) 4,537,685 — (f) Commercial loan troubled debt restructurings (g) 45,169 — Loans and leases Sale-leaseback transaction 18,111 — (h) Proprietary trust preferred issuances (i) — 167,014 Term borrowings (a) Maximum loss exposure represents $101.3 million of current investments and $136.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2023. (b) A liability is not recognized as investments are written down over the life of the related tax credit. (c) Maximum loss exposure represents current investment balance. As of December 31, 2019, there were no investments funded through loans from community development enterprises. (d) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (e) Includes $112.5 million classified as Loans and leases, and $1.7 million classified as Trading securities which are offset by $80.9 million classified as Term borrowings. (f) Includes $0.5 billion classified as Trading securities and $4.0 billion classified as securities available for sale. (g) Maximum loss exposure represents $43.4 million of current receivables and $1.8 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (h) Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives In the normal course of business, FHN utilizes various financial instruments (including derivative contracts and credit-related agreements) through its fixed income and risk management operations, as part of its risk management strategy and as a means to meet customers’ needs. Derivative instruments are subject to credit and market risks in excess of the amount recorded on the balance sheet as required by GAAP. The contractual or notional amounts of these financial instruments do not necessarily represent the amount of credit or market risk. However, they can be used to measure the extent of involvement in various types of financial instruments. Controls and monitoring procedures for these instruments have been established and are routinely reevaluated. The Asset/Liability Committee (“ALCO”) controls, coordinates, and monitors the usage and effectiveness of these financial instruments. Credit risk represents the potential loss that may occur if a party to a transaction fails to perform according to the terms of the contract. The measure of credit exposure is the replacement cost of contracts with a positive fair value. FHN manages credit risk by entering into financial instrument transactions through national exchanges, primary dealers or approved counterparties, and by using mutual margining and master netting agreements whenever possible to limit potential exposure. FHN also maintains collateral posting requirements with certain counterparties to limit credit risk. Daily margin posted or received with central clearinghouses is considered a legal settlement of the related derivative contracts which results in a net presentation for each contract in the Consolidated Balance Sheets. Treatment of daily margin as a settlement has no effect on hedge accounting or gains/losses for the applicable derivative contracts. On September 30, 2020 and December 31, 2019, respectively, FHN had $289.5 million and $136.6 million of cash receivables and $141.9 million and $53.0 million of cash payables related to collateral posting under master netting arrangements, inclusive of collateral posted related to contracts with adjustable collateral posting thresholds and over-collateralized positions, with derivative counterparties. With exchange-traded contracts, the credit risk is limited to the clearinghouse used. For non-exchange traded instruments, credit risk may occur when there is a gain in the fair value of the financial instrument and the counterparty fails to perform according to the terms of the contract and/or when the collateral proves to be of insufficient value. See additional discussion regarding master netting agreements and collateral posting requirements later in this note under the heading “Master Netting and Similar Agreements.” Market risk represents the potential loss due to the decrease in the value of a financial instrument caused primarily by changes in interest rates or the prices of debt instruments. FHN manages market risk by establishing and monitoring limits on the types and degree of risk that may be undertaken. FHN continually measures this risk through the use of models that measure value-at-risk and earnings-at-risk. Derivative Instruments. FHN enters into various derivative contracts both to facilitate customer transactions and as a risk management tool. Where contracts have been created for customers, FHN enters into upstream transactions with dealers to offset its risk exposure. Contracts with dealers that require central clearing are novated to a clearing agent who becomes FHN’s counterparty. Derivatives are also used as a risk management tool to hedge FHN’s exposure to changes in interest rates or other defined market risks. Forward contracts are over-the-counter contracts where two parties agree to purchase and sell a specific quantity of a financial instrument at a specified price, with delivery or settlement at a specified date. Futures contracts are exchange-traded contracts where two parties agree to purchase and sell a specific quantity of a financial instrument at a specified price, with delivery or settlement at a specified date. Interest rate option contracts give the purchaser the right, but not the obligation, to buy or sell a specified quantity of a financial instrument, at a specified price, during a specified period of time. Caps and floors are options that are linked to a notional principal amount and an underlying indexed interest rate. Interest rate swaps involve the exchange of interest payments at specified intervals between two parties without the exchange of any underlying principal. Swaptions are options on interest rate swaps that give the purchaser the right, but not the obligation, to enter into an interest rate swap agreement during a specified period of time. Trading Activities FHN’s fixed income segment trades U.S. Treasury, U.S. Agency, government-guaranteed loan, mortgage-backed, corporate and municipal fixed income securities, and other securities for distribution to customers. When these securities settle on a delayed basis, they are considered forward contracts. Fixed income also enters into interest rate contracts, including caps, swaps, and floors, for its customers. In addition, fixed income enters into futures and option contracts to economically hedge interest rate risk associated with a portion of its securities inventory. These transactions are measured at fair value, with changes in fair value recognized currently in fixed income noninterest income. Related assets and liabilities are recorded on the Consolidated Balance Sheets as derivative assets and derivative liabilities within Other assets and Other liabilities. The FHN Financial Risk Committee and the Credit Risk Management Committee collaborate to mitigate credit risk related to these transactions. Credit risk is controlled through credit approvals, risk control limits, and ongoing monitoring procedures. Total trading revenues were $98.9 million and $63.6 million for the three months ended September 30, 2020 and 2019, and $277.5 million and $162.7 million for the nine months ended September 30, 2020 and 2019, respectively. Trading revenues are inclusive of both derivative and non-derivative financial instruments, and are included in Fixed income on the Consolidated Statements of Income. The following tables summarize FHN’s derivatives associated with fixed income trading activities as of September 30, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 3,847,085 $ 240,218 $ 2,444 Offsetting upstream interest rate contracts 3,847,085 2,317 16,828 Forwards and futures purchased 15,069,709 41,553 3,456 Forwards and futures sold 15,596,324 5,788 39,018 December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 2,697,522 $ 65,768 $ 6,858 Offsetting upstream interest rate contracts 2,697,522 2,583 3,994 Option contracts purchased 40,000 131 — Forwards and futures purchased 9,217,350 17,029 3,187 Forwards and futures sold 9,403,112 3,611 16,620 Interest Rate Risk Management FHN’s ALCO focuses on managing market risk by controlling and limiting earnings volatility attributable to changes in interest rates. Interest rate risk exists to the extent that interest-earning assets and interest-bearing liabilities have different maturity or repricing characteristics. FHN uses derivatives, primarily swaps, that are designed to moderate the impact on earnings as interest rates change. Interest paid or received for swaps utilized by FHN to hedge the fair value of long term debt is recognized as an adjustment of the interest expense of the liabilities whose risk is being managed. FHN’s interest rate risk management policy is to use derivatives to hedge interest rate risk or market value of assets or liabilities, not to speculate. In addition, FHN has entered into certain interest rate swaps and caps as a part of a product offering to commercial customers that includes customer derivatives paired with upstream offsetting market instruments that, when completed, are designed to mitigate interest rate risk. These contracts do not qualify for hedge accounting and are measured at fair value with gains or losses included in current earnings in Noninterest expense on the Consolidated Statements of Income. FHN designated a derivative transaction in a hedging strategy to manage interest rate risk on $400.0 million of senior debt issued by First Horizon Bank prior to its maturity in December 2019. This qualified for hedge accounting under ASC 815-20 using the long-haul method. FHN entered into a pay floating, receive fixed interest rate swap to hedge the interest rate risk of the senior debt. First Horizon Bank early redeemed the $400.0 million senior debt on November 1, 2019. FHN has designated a derivative transaction in a hedging strategy to manage interest rate risk on $500.0 million of senior debt which matures in December 2020. This qualifies for hedge accounting under ASC 815-20 using the long-haul method. FHN entered into a pay floating, receive fixed interest rate swap to hedge the interest rate risk of the senior debt. FHN has provided notice of its intent to exercise the early redemption option for this senior debt on November 15, 2020. The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of September 30, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 6,667,600 $ 487,005 $ 303 Offsetting upstream interest rate contracts 6,667,600 303 25,997 Debt Hedging Hedging Instruments: Interest rate swaps $ 500,000 $ 13 N/A Hedged Items: Term borrowings: Par N/A N/A $ 500,000 Cumulative fair value hedging adjustments N/A N/A 729 Unamortized premium (discount) and issuance costs N/A N/A (74) Total carrying value N/A N/A $ 500,655 December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 3,044,067 $ 90,394 $ 3,515 Offsetting upstream interest rate contracts 3,044,067 3,537 9,735 Debt Hedging Hedging Instruments: Interest rate swaps $ 500,000 N/A $ 69 Hedged Items: Term borrowings: Par N/A N/A $ 500,000 Cumulative fair value hedging adjustments N/A N/A (1,604) Unamortized premium (discount) and issuance costs N/A N/A (740) Total carrying value N/A N/A $ 497,656 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, 2020 and 2019: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (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) $ (14,050) $ 44,375 $ 197,346 $ 124,193 Offsetting upstream interest rate contracts (a) 14,050 (44,375) (197,346) (124,193) Debt Hedging Hedging Instruments: Interest rate swaps (b) $ (1,421) $ 1,994 $ 2,776 $ 12,969 Hedged Items: Term borrowings (a) (c) 1,412 (2,004) (2,333) (12,876) (a) Gains (losses) included in Other expense within the Consolidated Statements of Income. (b) Gains (losses) included in Interest expense. (c) Represents gains and losses attributable to changes in fair value due to interest rate risk as designated in ASC 815-20 hedging relationships. In first quarter 2016, FHN entered into a pay floating, receive fixed interest rate swap in a hedging strategy to manage its exposure to the variability in cash flows related to the interest payments for the following five years on $250 million principal of debt instruments, which primarily consist of held-to-maturity trust preferred loans that have variable interest payments based on 3-month LIBOR. In first quarter 2017, FHN initiated cash flow hedges of $650 million notional amount that had initial durations between three years and seven years. $200 million of these swaps expired in first quarter 2020. In conjunction with the IBKC merger, FHN acquired interest rate contracts (floors and collars) with a notional value of $800 million and initial remaining terms between 11 and 34 months which have been re-designated as cash floor hedges. 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. 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. 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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 1,500,000 $ 35,606 N/A Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 1,500,000 N/A December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 900,000 N/A $ 241 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, 2020 and 2019: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Cash Flow Hedges Hedging Instruments: Interest rate contracts (a) $ (7,799) $ 3,840 $ 9,644 $ 22,954 Gain (loss) recognized in Other comprehensive income (loss) (805) 1,855 13,998 13,367 Gain (loss) reclassified from AOCI into Interest income (2,128) 989 (3,853) 3,773 (a) Approximately $26.5 million of pre-tax gains are expected to be reclassified into earnings in the next twelve months. Other Derivatives As part of the merger with IBKC, FHN acquired mortgage banking operations that include the origination and sale of loans into the secondary market. As part of the origination of loans, FHN enters into interest rate lock commitments with borrowers. Additionally, FHN enters into forward sales contracts with buyers for delivery of loans at a future date. Both of these contracts qualify as freestanding derivatives and are recognized at fair value through earnings. The notional and fair values of these contracts are presented in the table below. Balances and activity for periods prior to the IBKC merger were not significant. September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Mortgage Banking Hedges Option contracts written $ 698,744 $ 21,677 $ 223 Forward contracts purchased 753,660 859 2,577 The following table summarizes gains (losses) on FHN's derivatives associated with mortgage banking activities for the three and nine month periods ended September 30, 2020. Three Months Ended Nine Months Ended 2020 2020 (Dollars in thousands) Gains (Losses) Gains (Losses) Mortgage Banking Hedges Option contracts written $ 7,434 $ 7,434 Forward contracts purchased (9,633) (9,633) In conjunction with the sales of a portion of its Visa Class B shares in 2010 and 2011, FHN and the purchaser entered into derivative transactions whereby FHN will make or receive cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. FHN is also required to make periodic financing payments to the purchasers until all of Visa's covered litigation matters are resolved. In third quarter 2018, FHN sold the remainder of its Visa Class B shares, entering into a similar derivative arrangement with the counterparty. All of these derivatives extend until the end of Visa’s Covered Litigation matters. In September 2018, Visa reached a preliminary settlement for one class of plaintiffs in its Payment Card Interchange matter which later received final court approval in December 2019. In accordance with the agreement terms, several individual plaintiffs opted out of the settlement and have the opportunity to separately pursue resolution with Visa. Settlement has not been reached with the second class of plaintiffs in this matter and other covered litigation matters are also pending judicial resolution. Accordingly, the value and timing for completion of Visa’s Covered Litigation matters are uncertain. The derivative transaction executed in third quarter 2018 includes a contingent accelerated termination clause based on the credit ratings of FHN and First Horizon Bank. FHN has not received or paid collateral related to this contract. As of September 30, 2020 and December 31, 2019, the derivative liabilities associated with the sales of Visa Class B shares were $15.6 million and $22.8 million, respectively. See Note 17 - 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, 2020 and December 31, 2019, these loans were valued at $9.1 million and $18.4 million, respectively. The balance sheet amount and the gains/losses associated with these derivatives were not significant. Related to its loan participation/syndication activities, FHN enters into risk participation agreements, under which it assumes exposure for, or receives indemnification for, borrowers’ performance on underlying interest rate derivative contracts. FHN’s counterparties in these contracts are other lending institutions involved in the loan participation/syndication arrangements for which the underlying interest rate derivative contract is intended to hedge interest rate risk for the borrower. FHN will make (other institution is the lead bank) or receive (FHN is the lead bank) payments for risk participations if the borrower defaults on its obligation to perform under the terms of its interest rate derivative agreement with the lead bank in the participation. As of September 30, 2020 the notional values of FHN’s risk participations were $248.5 million of derivative assets and $543.0 million of derivative liabilities. The notional value for risk participation/syndication agreements is consistent with the percentage of participation in the lending arrangement. FHN’s maximum exposure or benefit in the risk participation agreements is contingent on the fair value of the underlying interest rate derivative contracts for which the borrower is in a liability position at the time of default. FHN monitors the credit risk associated with the borrowers to which the risk participations relate through the same credit risk assessment process utilized for establishing credit loss estimates for its loan portfolio. These credit risk estimates are included in the determination of fair value for the risk participations. As of September 30, 2020, FHN had recognized $342 thousand of derivative assets and $1.5 million of derivative liabilities associated with risk participation agreements. In conjunction with the IBKC merger, FHN obtained certain certificates of deposit with the rate of return based on an equity index which is considered an embedded derivative as a written option that must be separately recognized. The risks of the written option are offset by purchasing an option with terms that mirror the written option, which is also carried at fair value on the Company’s consolidated balance sheets. As of September 30, 2020, FHN had recognized $1.3 million of both assets and liabilities associated with these contracts. 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 initial 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 Balance Sheets. 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 Balance Sheets. Interest rate derivatives associated with lending arrangements share the collateral with the related loan(s). The derivative and loan positions may be netted in the event of default. For disclosure purposes, the entire collateral amount is allocated to the loan. Interest rate derivatives with larger financial institutions entered into prior to required central clearing typically contain provisions whereby the collateral posting thresholds under the agreements adjust based on the credit ratings of both counterparties. If the credit rating of FHN and/or First Horizon Bank is lowered, FHN could be required to post additional collateral with the counterparties. Conversely, if the credit rating of FHN and/or First Horizon Bank is increased, FHN could have collateral released and be required to post less collateral in the future. Also, if a counterparty’s credit ratings were to decrease, FHN and/or First Horizon Bank could require the posting of additional collateral; whereas if a counterparty’s credit ratings were to increase, the counterparty could require the release of excess collateral. Collateral for these arrangements is adjusted daily based on changes in the net fair value position with each counterparty. The net fair value, determined by individual counterparty, of all interest rate derivative instruments with adjustable collateral posting thresholds was $239.0 million of assets and $3.6 million of liabilities on September 30, 2020, and $63.1 million of assets and $6.4 million of liabilities on December 31, 2019. As of September 30, 2020 and December 31, 2019, FHN had received collateral of $349.6 million and $148.5 million and posted collateral of $41.1 million and $18.4 million, respectively, in the normal course of business related to these agreements. Certain agreements entered into prior to required central clearing also contain accelerated termination provisions, inclusive of the right of offset, if a counterparty’s credit rating falls below a specified level. If a counterparty’s debt rating (including FHN’s and First Horizon Bank’s) were to fall below these minimums, these provisions would be triggered, and the counterparties could terminate the agreements and require immediate settlement of all derivative contracts under the agreements. The net fair value, determined by individual counterparty, of all interest rate derivative instruments with credit-risk-related contingent accelerated termination provisions was $239.0 million of assets and $24.0 million of liabilities on September 30, 2020, and $63.1 million of assets and $10.3 million of liabilities on December 31, 2019. As of September 30, 2020 and December 31, 2019, FHN had received collateral of $349.6 million and $148.5 million and posted collateral of $62.8 million and $22.7 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 Balance Sheets as of September 30, 2020 and December 31, 2019: Gross amounts not offset in (Dollars in thousands) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative assets: September 30, 2020 Interest rate derivative contracts $ 787,139 $ — $ 787,139 $ (11,401) $ (369,510) $ 406,228 Forward contracts 47,341 — 47,341 (16,105) (16,213) 15,023 $ 834,480 $ — $ 834,480 $ (27,506) $ (385,723) $ 421,251 December 31, 2019 Interest rate derivative contracts $ 162,344 $ — $ 162,344 $ (5,604) $ (143,334) $ 13,406 Forward contracts 20,640 — 20,640 (13,292) (2,000) 5,348 $ 182,984 $ — $ 182,984 $ (18,896) $ (145,334) $ 18,754 (a) Included in Other assets on the Consolidated Balance Sheets. As of September 30, 2020 and December 31, 2019, $2.6 million and $0.1 million of derivative assets have been excluded from these tables because they are generally not subject to master netting or similar agreements. The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019: Gross amounts not offset in the (Dollars in thousands) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative liabilities: September 30, 2020 Interest rate derivative contracts $ 47,047 $ — $ 47,047 $ (11,401) $ (30,829) $ 4,817 Forward contracts 42,474 — 42,474 (16,105) (26,369) — $ 89,521 $ — $ 89,521 $ (27,506) $ (57,198) $ 4,817 December 31, 2019 Interest rate derivative contracts $ 24,431 $ — $ 24,431 $ (5,604) $ (18,689) $ 138 Forward contracts 19,807 — 19,807 (13,292) (6,515) — $ 44,238 $ — $ 44,238 $ (18,896) $ (25,204) $ 138 (a) Included in Other liabilities on the Consolidated Balance Sheets. As of September 30, 2020 and December 31, 2019, $19.9 million and $23.2 million, respectively, of derivative liabilities (primarily Visa-related derivatives) have been excluded from these tables because they are generally not subject to master netting or similar agreements.

Master Netting and Similar Agre

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions	9 Months Ended
	Sep. 30, 2020
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 Balance Sheets. 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. Securities purchased under agreements to resell is included in Federal funds sold and securities purchased under agreements to resell in the Consolidated Balance Sheets. Securities sold under agreements to repurchase is included in Short-term borrowings. The following table provides details of securities purchased under agreements to resell and collateral pledged by counterparties as of September 30, 2020 and December 31, 2019: Gross amounts not offset in the (Dollars in thousands) Gross amounts Gross amounts Net amounts of Offsetting Securities collateral Net amount Securities purchased under agreements to resell: September 30, 2020 $ 591,987 $ — $ 591,987 $ (70) $ (590,123) $ 1,794 December 31, 2019 586,629 — 586,629 (21,004) (562,702) 2,923 The following table provides details of securities sold under agreements to repurchase and collateral pledged by FHN as of September 30, 2020 and December 31, 2019: Gross amounts not offset in the (Dollars in thousands) Gross amounts Gross amounts Net amounts of Offsetting Securities/ Net amount Securities sold under agreements to repurchase: September 30, 2020 $ 1,158,994 $ — $ 1,158,994 $ (70) $ (1,158,791) $ 133 December 31, 2019 716,925 — 716,925 (21,004) (695,879) 42 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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 363,674 $ — $ 363,674 Government agency issued MBS 578,284 6,882 585,166 Government agency issued CMO 4,529 2,412 6,941 Other U.S. government agencies 82,576 — 82,576 Government guaranteed loans (SBA and USDA) 120,637 — 120,637 Total securities sold under agreements to repurchase $ 1,149,700 $ 9,294 $ 1,158,994 December 31, 2019 (Dollars in thousands) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 41,364 $ — $ 41,364 Government agency issued MBS 341,173 4,545 345,718 Other U.S. government agencies 54,924 — 54,924 Government guaranteed loans (SBA and USDA) 274,919 — 274,919 Total securities sold under agreements to repurchase $ 712,380 $ 4,545 $ 716,925

Fair Value of Assets & Liabilit

Fair Value of Assets & Liabilities	9 Months Ended
	Sep. 30, 2020
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. 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, 2020: September 30, 2020 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 98,743 $ — $ 98,743 Government agency issued MBS — 352,564 — 352,564 Government agency issued CMO — 501,091 — 501,091 Other U.S. government agencies — 261,569 — 261,569 States and municipalities — 13,087 — 13,087 Corporate and other debt — 158,544 — 158,544 Total trading securities—fixed income — 1,385,598 — 1,385,598 Trading securities—mortgage banking — — 471 471 Loans held for sale (elected fair value) — 359,396 12,435 371,831 Loans held for investment (elected fair value) — — 12,372 12,372 Securities available for sale: U.S. treasuries — 300,034 — 300,034 Government agency issued MBS — 3,827,066 — 3,827,066 Government agency issued CMO — 2,705,447 — 2,705,447 Other U.S. government agencies — 658,266 — 658,266 States and municipalities — 432,090 — 432,090 Corporate and other debt — 40,010 — 40,010 Interest-Only Strip (elected fair value) — — 32,959 32,959 Total securities available for sale — 7,962,913 32,959 7,995,872 Other assets: Deferred compensation mutual funds 109,907 — — 109,907 Equity, mutual funds, and other 24,712 — — 24,712 Derivatives, forwards and futures 48,200 — — 48,200 Derivatives, interest rate contracts — 787,139 — 787,139 Derivatives, other — 1,436 342 1,778 Total other assets 182,819 788,575 342 971,736 Total assets $ 182,819 $ 10,496,482 $ 58,579 $ 10,737,880 Trading liabilities—fixed income: U.S. treasuries $ — $ 431,565 $ — $ 431,565 States and municipalities — 203 — 203 Corporate and other debt — 45,298 — 45,298 Equity, mutual funds, and other — 7 — 7 Total trading liabilities—fixed income — 477,073 — 477,073 Other liabilities: Derivatives, forwards and futures 45,051 — — 45,051 Derivatives, interest rate contracts — 45,795 — 45,795 Derivatives, other — 1,462 17,140 18,602 Total other liabilities 45,051 47,257 17,140 109,448 Total liabilities $ 45,051 $ 524,330 $ 17,140 $ 586,521 The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2019: December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 134,844 $ — $ 134,844 Government agency issued MBS — 268,024 — 268,024 Government agency issued CMO — 250,652 — 250,652 Other U.S. government agencies — 124,972 — 124,972 States and municipalities — 120,744 — 120,744 Corporate and other debt — 445,253 — 445,253 Equity, mutual funds, and other — 777 — 777 Total trading securities—fixed income — 1,345,266 — 1,345,266 Trading securities—mortgage banking — — 941 941 Loans held for sale (elected fair value) — — 14,033 14,033 Securities available for sale: U.S. treasuries — 100 — 100 Government agency issued MBS — 2,348,517 — 2,348,517 Government agency issued CMO — 1,670,492 — 1,670,492 Other U.S. government agencies — 306,092 — 306,092 States and municipalities — 60,526 — 60,526 Corporate and other debt — 40,540 — 40,540 Interest-Only Strip (elected fair value) — — 19,136 19,136 Total securities available for sale — 4,426,267 19,136 4,445,403 Other assets: Deferred compensation mutual funds 46,815 — — 46,815 Equity, mutual funds, and other 22,643 — — 22,643 Derivatives, forwards and futures 20,640 — — 20,640 Derivatives, interest rate contracts — 162,413 — 162,413 Derivatives, other — 62 — 62 Total other assets 90,098 162,475 — 252,573 Total assets $ 90,098 $ 5,934,008 $ 34,110 $ 6,058,216 Trading liabilities—fixed income: U.S. treasuries $ — $ 406,380 $ — $ 406,380 Other U.S. government agencies — 88 — 88 Government agency issued MBS — 33 — 33 Corporate and other debt — 99,080 — 99,080 Total trading liabilities—fixed income — 505,581 — 505,581 Other liabilities: Derivatives, forwards and futures 19,807 — — 19,807 Derivatives, interest rate contracts — 24,412 — 24,412 Derivatives, other — 466 22,795 23,261 Total other liabilities 19,807 24,878 22,795 67,480 Total liabilities $ 19,807 $ 530,459 $ 22,795 $ 573,061 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, 2020 and 2019, on a recurring basis are summarized as follows: Three Months Ended September 30, 2020 (Dollars in thousands) Trading Interest- only strips- AFS Loans held Loans held for investment Net derivative Balance on July 1, 2020 $ 628 $ 25,446 $ 13,263 $ — $ (18,645) Acquired — — — 13,746 — Total net gains (losses) included in: Net income (157) (1,282) (80) (418) (599) Purchases — — — — — Sales — (56) — (2,927) — Settlements — — (748) (2,312) 2,446 Net transfers into (out of) Level 3 — 8,851 (b) — 4,283 — Balance on September 30, 2020 $ 471 $ 32,959 $ 12,435 $ 12,372 $ (16,798) Net unrealized gains (losses) included in net income $ — (a) $ 1,192 (c) $ (80) (a) $ 367 $ (76) (d) Three Months Ended September 30, 2019 (Dollars in thousands) Trading Interest-only-strips-AFS Loans held for sale Net derivative Balance on July 1, 2019 $ 1,255 $ 17,792 $ 15,092 $ (26,545) Total net gains (losses) included in: Net income (157) (1,421) 443 (4,008) Purchases — — — — Sales — (11,401) — — Settlements — — (1,126) 2,468 Net transfers into (out of) Level 3 — 10,279 (b) — — Balance on September 30, 2019 $ 1,098 $ 15,249 $ 14,409 $ (28,085) Net unrealized gains (losses) included in net income $ — (a) $ (1,977) (c) $ 443 (a) $ (4,008) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in Other expense. The changes in Level 3 assets and liabilities measured at fair value for the nine months ended September 30, 2020 and 2019, on a recurring basis are summarized as follows: Nine Months Ended September 30, 2020 (Dollars in thousands) Trading Interest- only strips- AFS Loans held Loans held for investment Net derivative Balance on January 1, 2020 $ 941 $ 19,136 $ 14,033 $ — $ (22,795) Acquired — — — 13,746 — Total net gains (losses) included in: Net income (470) (3,810) 671 (418) (1,311) Purchases — 5,481 — — — Sales — (8,759) — (2,927) — Settlements — — (2,269) (2,312) 7,308 Net transfers into (out of) Level 3 — 20,911 (b) — 4,283 — Balance on September 30, 2020 $ 471 $ 32,959 $ 12,435 $ 12,372 $ (16,798) Net unrealized gains (losses) included in net income $ — (a) $ 2,994 (c) $ 671 (a) $ 367 $ (788) (d) Nine Months Ended September 30, 2019 (Dollars in thousands) Trading Interest-only-strips-AFS Loans held for sale Net derivative Balance on January 1, 2019 $ 1,524 $ 9,902 $ 16,273 $ (31,540) Total net gains (losses) included in: Net income (128) (2,820) 1,259 (3,892) Purchases — 86 10 — Sales — (38,612) — — Settlements (298) — (3,133) 7,347 Net transfers into (out of) Level 3 — 46,693 (b) — — Balance on September 30, 2019 $ 1,098 $ 15,249 $ 14,409 $ (28,085) Net unrealized gains (losses) included in net income $ (66) (a) $ (1,250) (c) $ 1,259 (a) $ (3,892) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in Other expense. There were no net unrealized gains (losses) for Level 3 assets and liabilities included in other comprehensive income as of September 30, 2020 and 2019. 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 Consolidated Balance Sheets at September 30, 2020, and December 31, 2019, 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, 2020 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 594,485 $ 743 $ 595,228 Loans held for sale—first mortgages — — 529 529 Loans and leases (a) — — 114,583 114,583 OREO (b) — — 17,767 17,767 Other assets (c) — — 9,490 9,490 Carrying value at December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 492,595 $ 929 $ 493,524 Loans held for sale—first mortgages — — 516 516 Loans and leases (a) — — 42,208 42,208 OREO (b) — — 15,660 15,660 Other assets (c) — — 10,608 10,608 (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 credit losses. (b) Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. For assets measured on a nonrecurring basis which were still held on the Consolidated Balance Sheets at period end, the following table provides information about the fair value adjustments recorded during the three and nine months ended September 30, 2020 and 2019: Net gains (losses) Three Months Ended September 30, Net gains (losses) Nine months ended September 30, (Dollars in thousands) 2020 2019 2020 2019 Loans held for sale—SBAs and USDA $ (1,560) $ (977) $ (2,304) $ (1,208) Loans held for sale—first mortgages 31 2 32 27 Loans and leases (a) (17,444) (15,559) (31,040) (16,036) OREO (b) (34) (282) (203) (256) Other assets (c) (346) (407) (1,118) (1,349) $ (19,353) $ (17,223) $ (34,633) $ (18,822) (a) Write-downs on these loans are recognized as part of provision for credit 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 2020, FHN recognized $4.8 million of fixed asset impairments and $4.2 million of impairments for lease assets primarily related to continuing acquisition integration efforts associated with reduction of leased office space and branch optimization. These amounts were primarily recognized in the Corporate segment. In 2019, FHN recognized $4.6 million of impairments and $0.7 million of impairment reversals, respectively, related to dispositions of acquired properties and $1.5 million of impairments for lease assets related to continuing acquisition integration efforts associated with reduction of leased office space and branch optimization. Related to its restructuring, repositioning, and efficiency efforts, FHN recognized $14.0 million of impairments and $1.4 million of impairment reversals, respectively, for tangible long-lived assets and lease assets. Related to FHN's rebranding initiative, FHN recognized $7.1 million of impairments within the Corporate segment for long-lived tangible assets, primarily signage, related to FHN's rebranding initiative. These amounts were recognized in the Corporate segment. Lease asset impairments recognized represent the reduction in value of the right-of-use assets associated with leases that are being exited in advance of the contractual lease expiration. Impairments are measured using a discounted cash flow methodology, which is considered a Level 3 valuation. Impairments of long-lived tangible assets reflect locations where the associated land and building are either owned or leased. The fair values of owned sites were determined using estimated sales prices from appraisals and broker opinions less estimated costs to sell with adjustments upon final disposition. The fair values of owned assets in leased sites (e.g., leasehold improvements) were determined using a discounted cash flow approach, based on the revised estimated useful lives of the related assets. Both measurement methodologies are considered Level 3 valuations. Impairment adjustments recognized upon disposition of a location are considered Level 2 valuations. Level 3 Measurements The following tables provide information regarding the unobservable inputs utilized in determining the fair value of Level 3 recurring and non-recurring measurements as of September 30, 2020 and December 31, 2019: (Dollars in thousands) Values Utilized Level 3 Class Fair Value at September 30, 2020 Valuation Techniques Unobservable Input Range Weighted Average (d) Available for sale securities SBA-interest only strips $ 32,959 Discounted cash flow Constant prepayment rate 12% 12% Bond equivalent yield 14% - 16% 15% Loans held for sale - residential real estate 12,964 Discounted cash flow Prepayment speeds - First mortgage 5% - 15% 5.4% Foreclosure losses 50% - 65% 63% Loss severity trends - First mortgage 3% - 19% of UPB 13.3% Loans held for sale - unguaranteed interest in SBA loans 743 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 7% 7% Loans held for investment 12,372 Discounted cash flow Constant prepayment rate 0% - 24% 11% Constant default rate 0% - 15% 1% Loss severity trends 0% - 100% 1% Derivative liabilities, other 16,798 Discounted cash flow Visa covered litigation resolution amount $5.4 billion - $6.0 billion $5.8 billion Probability of resolution scenarios 10% - 50% 16% Time until resolution 6 - 30 21 months Loans and leases (a) 114,583 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 17,767 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 9,490 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value. (Dollars in thousands) Values Utilized Level 3 Class Fair Value at December 31, 2019 Valuation Techniques Unobservable Input Range Weighted Average (d) Available for sale securities SBA-interest only strips $ 19,136 Discounted cash flow Constant prepayment rate 12% 12% Bond equivalent yield 16% - 17% 16% Loans held for sale - residential real estate 14,549 Discounted cash flow Prepayment speeds - First mortgage 3% - 14% 4.1% Prepayment speeds - HELOC 0% - 12% 7.6% Foreclosure losses 50% - 66% 64% Loss severity trends - First mortgage 3% - 24% of UPB 14.3% Loss severity trends - HELOC 0% - 72% of UPB 50% Loans held for sale - unguaranteed interest in SBA loans 929 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 9% 9% Derivative liabilities, other 22,795 Discounted cash flow Visa covered litigation resolution amount $5.4 billion - $6.0 billion $5.8 billion Probability of resolution scenarios 10% - 50% 16% Time until resolution 15 - 39 months 29 months Loans and leases (a) 42,208 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 15,660 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 10,608 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value. Securities AFS . Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of SBA interest only strips. Management additionally considers whether the loans underlying related SBA-interest only strips are delinquent, in default or prepaying, and adjusts the fair value down 20 - 100% depending on the length of time in default. Loans held for sale. Foreclosure losses and prepayment rates are significant unobservable inputs used in the fair value measurement of FHN’s residential real estate loans held for sale. Loss severity trends are also assessed to evaluate the reasonableness of fair value estimates resulting from discounted cash flows methodologies as well as to estimate fair value for newly repurchased loans and loans that are near foreclosure. Significant increases (decreases) in any of these inputs in isolation would result in significantly lower (higher) fair value measurements. All observable and unobservable inputs are re-assessed quarterly. Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of unguaranteed interests in SBA loans. Unguaranteed interest in SBA loans held for sale are carried at less than the outstanding balance due to credit risk estimates. Credit risk adjustments may be reduced if prepayment is likely or as consistent payment history is realized. Management also considers other factors such as delinquency or default and adjusts the fair value accordingly. Loans held for investment. Constant prepayment rate, constant default rate and loss severity trends are significant unobservable inputs used in the fair value measurement of loans held for investment. Increases (decreases) in each of these inputs in isolation result in negative (positive) effects on the valuation of the associated loans. Derivative liabilities. In conjunction with the sales of its Visa Class B shares, FHN and the purchasers entered into derivative transactions whereby FHN will make, or receive, cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. FHN uses a discounted cash flow methodology in order to estimate the fair value of FHN’s derivative liabilities associated with its prior sales of Visa Class B shares. The methodology includes estimation of both the resolution amount for Visa’s Covered Litigation matters as well as the length of time until the resolution occurs. Significant increases (decreases) in either of these inputs in isolation would result in significantly higher (lower) fair value measurements for the derivative liabilities. Additionally, FHN performs a probability weighted multiple resolution scenario to calculate the estimated fair value of these derivative liabilities. Assignment of higher (lower) probabilities to the larger potential resolution scenarios would result in an increase (decrease) in the estimated fair value of the derivative liabilities. Since this estimation process requires application of judgment in developing significant unobservable inputs used to determine the possible outcomes and the probability weighting assigned to each scenario, these derivatives have been classified within Level 3 in fair value measurements disclosures. Loans and leases and Other Real Estate Owned. Collateral-dependent loans and OREO are primarily valued using appraisals based on sales of comparable properties in the same or similar markets. Other collateral (receivables, inventory, equipment, etc.) is valued through borrowing base certificates, financial statements and/or auction valuations. These valuations are discounted based on the quality of reporting, knowledge of the marketability/collectability of the collateral and historical disposition rates. Other assets – tax credit investments. The estimated fair value of tax credit investments accounted for under the equity method is generally determined in relation to the yield (i.e., future tax credits to be received) an acquirer of these investments would expect in relation to the yields experienced on current new issue and/or secondary market transactions. Thus, as tax credits are recognized, the future yield to a market participant is reduced, resulting in consistent impairment of the individual investments. Individual investments are reviewed for impairment quarterly, which may include the consideration of additional marketability discounts related to specific investments which typically includes consideration of the underlying property’s appraised value. Fair Value Option FHN has elected the fair value option on a prospective basis for substantially 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 relating to mortgage banking operations conducted prior to the IBKC merger 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. FHN also has a portion of mortgage loans held for investment for which the fair value option was elected upon origination and which continue to be accounted for at fair value. The following tables reflect the differences between the fair value carrying amount of residential real estate loans held for sale and held for investment 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, 2020 (Dollars in thousands) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 371,831 $ 361,865 $ 9,966 Nonaccrual loans 2,972 6,073 (3,101) Loans 90 days or more past due and still accruing 287 419 (132) Loans held for investment reported at fair value: Total loans $ 12,372 $ 13,062 $ (690) Nonaccrual loans 643 890 (247) December 31, 2019 (Dollars in thousands) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 14,033 $ 19,278 $ (5,245) Nonaccrual loans 3,532 6,646 (3,114) Loans 90 days or more past due and still accruing 163 268 (105) 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) 2020 2019 2020 2019 Changes in fair value included in net income: Mortgage banking noninterest income Loans held for sale $ 1,867 $ 443 $ 2,618 $ 1,259 Loans held for investment (418) — (418) — For the three and nine months ended September 30, 2020 and 2019, the amount for residential real estate loans held for sale included insignificant amounts of gain in pretax earnings that is attributable to changes in instrument-specific credit risk. The portion of the fair value adjustments related to credit risk was determined based on estimated default rates and estimated loss severities. Interest income on residential real estate loans held for sale measured at fair value is calculated based on the note rate of the loan and is recorded in the interest income section of the Consolidated Statements of Income as interest on loans held for sale. FHN has elected to account for retained interest-only strips from guaranteed SBA loans recorded in available-for-sale securities at fair value through earnings. Since these securities are subject to the risk that prepayments may result in FHN not recovering all or a portion of its recorded investment, the fair value election results in a more timely recognition of the effects of estimated prepayments through earnings rather than being recognized through other comprehensive income with periodic review for other-than-temporary impairment. Gains or losses are recognized through fixed income revenues and are presented in the recurring measurements table. Determination of Fair Value In accordance with ASC 820-10-35, fair values are based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following describes the assumptions and methodologies used to estimate the fair value of financial instruments recorded at fair value in the Consolidated Balance Sheets and for estimating the fair value of financial instruments for which fair value is disclosed under ASC 825-10-50. Short-term financial assets. Federal funds sold, securities purchased under agreements to resell, and interest bearing deposits with other financial institutions and the Federal Reserve are carried at historical cost. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the instrument and its expected realization. Trading securities and trading liabilities. Trading securities and trading liabilities are recognized at fair value through current earnings. Trading inventory held for broker-dealer operations is included in trading securities and trading liabilities. Broker-dealer long positions are valued at bid price in the bid-ask spread. Short positions are valued at the ask price. Inventory positions are valued using observable inputs including current market transactions, LIBOR and U.S. treasury curves, credit spreads, and consensus prepayment speeds. Trading loans are valued using observable inputs including current market transactions, swap rates, mortgage rates, and consensus prepayment speeds. Trading securities also include retained interests in prior mortgage securitizations that qualify as financial assets, which include primarily principal-only strips. FHN uses inputs including yield curves, credit spreads, and prepayment speeds to determine the fair value of principal-only strips. Securities available for sale. Securities available for sale includes the investment portfolio accounted for as available for sale under ASC 320-10-25. Valuations of available-for-sale securities are performed using observable inputs obtained from market transactions in similar securities. Typical inputs include LIBOR and U.S. treasury curves, consensus prepayment estimates, and credit spreads. When available, broker quotes are used to support these valuations. Interest only strips are valued at elected fair value based on an income approach using an internal valuation model. The internal valuation model includes assumptions regarding projections of future cash flows, prepayment rates, default rates and interest only strip terms. These securities bear the risk of loan prepayment or default that may result in FHN 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. FHN determines the fair value of loans held for sale using either current transaction prices or discounted cash flow models. Fair values are determined using current transaction prices and/or values on similar assets when available which includes committed bids for specific loans or loan portfolios. Uncommitted bids may be adjusted based on other available market information. Fair value of residential real estate loans held for sale determined using a discounted cash flow model incorporates both observable and unobservable inputs. Inputs in the discounted cash flow model 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.

Restructuring, Repositioning, a

Restructuring, Repositioning, and Efficiency	9 Months Ended
	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Restructuring, Repositioning, and Efficiency	Restructuring, Repositioning, and Efficiency Beginning in 2019, FHN initiated a company-wide review of business practices with the goal of optimizing its expense base to improve profitability and create capacity to reinvest savings into technology and revenue production activities. Restructuring, repositioning, and efficiency charges related to these corporate-driven actions were not significant in the nine months ended September 30, 2020 and were $38.7 million in the nine months ended September 30, 2019 and are included in the Corporate segment. Significant expenses resulted from the following actions: • Severance and other employee costs primarily related to efficiency initiatives within corporate and bank services functions which are classified as personnel expense within noninterest expense. • Expense largely related to the identification of efficiency opportunities within the organization which is reflected in legal and professional fees. • Expense related to costs associated with asset impairments which is reflected in other expense. Settlement of the obligations arising from current initiatives will be funded from operating cash flows. Total expense recognized for the three and nine months ended September 30, 2020 and 2019 is presented in the table below: Three Months Ended Nine Months Ended Dollars in thousands 2020 2019 2020 2019 Personnel expense $ — $ 1,182 $ 89 $ 10,244 Legal and professional fees 2 6,488 16 15,025 Net occupancy expense — (128) 2 761 Other (83) 300 (185) 12,632 Total restructuring, repositioning, and efficiency charges $ (81) $ 7,842 $ (78) $ 38,662

Financial Information (Policies

Financial Information (Policies)	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Accounting	Basis of Accounting. The unaudited interim consolidated financial statements of First Horizon National Corporation (“FHN”), including its subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America and follow general practices within the industries in which it operates. This preparation requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates and assumptions are based on information available as of the date of the financial statements and could differ from actual results. 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 2020 period are not necessarily indicative of the results that may be expected in future periods. For further information, refer to the audited consolidated financial statements in Item 8 to FHN’s Annual Report on Form 10-K for the year ended December 31, 2019. Merger with IBERIABANK Corporation. On July 1, 2020, FHN and IBERIABANK Corporation ("IBKC") closed their merger-of-equals transaction (the "IBKC merger"). Historical periods prior to the closing of the merger only reflect results of legacy FHN operations. Subsequent to closing, results reflect all post-acquisition activity. Refer to Note 2– Acquisitions and Divestitures for additional information regarding the transaction.
Revenues, Contract Balances, Transaction Price Allocated to Remaining Performance Obligation	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. As a result of the IBKC merger on July 1, 2020, mortgage banking and title income has become a more significant revenue source. Mortgage banking and title income includes mortgage servicing income, title income, mortgage loan originations and sales, derivative settlements, as well as any changes in fair value recorded on mortgage loans and derivatives. See Note 1– Summary of Significant Accounting Policies in the Notes to Consolidated Financial Statements on Form 10-K for the year ended December 31, 2019, for discussion of FHN's other key revenues. Contract Balances. As of September 30, 2020, accounts receivable related to products and services on noninterest income were $8.8 million. For the three and nine months ended September 30, 2020, FHN had no material impairment losses on noninterest accounts receivable and there were no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Balance Sheets as of September 30, 2020. Credit risk is assessed on these accounts receivable each reporting period and the amount of estimated uncollectible receivables is not material. Transaction Price Allocated to Remaining Performance Obligations. For the three and nine months ended September 30, 2020, 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 13 – Business Segment Information for a reconciliation of disaggregated revenue by major product line and reportable segment.
Debt Investment Securities	Debt Investment Securities. Debt securities that may be sold prior to maturity are classified as available-for-sale (“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 Consolidated Statements of Comprehensive Income. Debt securities which management has the intent and ability to hold to maturity (“HTM”) are reported at amortized cost. Interest-only strips that are classified as securities AFS are valued at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for additional information. Realized gains and losses (i.e., from sales) for debt investment securities are determined by the specific identification method and reported in noninterest income. In periods subsequent to 2019, the evaluation of credit risk for HTM debt securities mirrors the process described below for loans held-for-investment. AFS debt securities are reviewed for potential credit impairment at the individual security level. The evaluation of credit risk includes consideration of third-party and government guarantees (both explicit and implicit), senior or subordinated status, credit ratings of the issuer, the effects of interest rate changes since purchase and observable market information such as issuer-specific credit spreads. Credit losses for AFS debt securities are generally recognized through establishment of an allowance for credit losses that cannot exceed the amount by which amortized cost exceeds fair value. Charge-offs are recorded as reductions of the security’s amortized cost and the credit allowance. Subsequent improvements in estimated credit losses result in reduction of the credit allowance, but not beyond zero. However, if FHN has the intent to sell or if it is more-likely-than-not that it will be compelled to sell a security with an unrecognized loss, the difference between the security's carrying value and fair value is recognized through earnings and a new amortized cost basis is established for the security (i.e., no allowance for credit losses is recognized). FHN has elected to exclude accrued interest receivable (“AIR”) from the fair value and amortized cost basis on AFS debt securities when assessing whether these securities have experienced credit impairment. Additionally, FHN has elected to not measure an allowance for credit losses on AIR for AFS debt securities based on its policy to write off uncollectible interest in a timely manner, which generally occurs when delinquency reaches no more than 90 days for all security types. Any such write offs are recognized as a reduction of interest income. AIR for AFS debt securities is included within Other assets in the Consolidated Balance Sheet. In periods prior to 2020, both AFS and HTM securities were reviewed quarterly for possible other-than-temporary impairment (“OTTI”). The review included an analysis of the facts and circumstances of each individual investment such as the degree of loss, the length of time the fair value had 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. Declines in value judged to be other-than-temporary (“OTTI”) based on FHN’s analysis of the facts and circumstances related to an individual investment, including securities that FHN had the intent to sell, were determined by the specific identification method. For HTM debt securities, OTTI recognized was typically credit-related and was reported in noninterest income. For impaired AFS debt securities that FHN did not intend to sell and was not required to sell prior to recovery but for which credit losses existed, the OTTI recognized was allocated between the total impairment related to credit losses which was reported in noninterest income, and the
Fed Funds Sold and Purchased	Fed Funds Sold and Purchased. Fed funds sold and purchased represent unsecured overnight funding arrangements between participants in the Federal Reserve system primarily to assist banks in meeting their regulatory cash reserve requirements. Fed Funds sold are evaluated for credit risk each reporting period. Due to the short duration of each transaction and the history of no credit losses, no credit loss has been recognized.
Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase	Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase. FHN purchases short-term securities under agreements to resell which are accounted for as collateralized financings except where FHN does not have an agreement to sell the same or substantially the same securities before maturity at a fixed or determinable price. All of FHN’s securities purchased under agreements to resell are recognized as collateralized financings. Securities delivered under these transactions are delivered to either the dealer custody account at the FRB or to the applicable counterparty. Securities sold under agreements to repurchase are offered to cash management customers as an automated, collateralized investment account. Securities sold under agreements to repurchase are also used by the consumer/commercial bank to obtain favorable borrowing rates on its purchased funds. All of FHN's securities sold under agreements to repurchase are secured borrowings. Collateral is valued daily and FHN may require counterparties to deposit additional securities or cash as collateral, or FHN may return cash or securities previously pledged by counterparties, or FHN may be required to post additional securities or cash as collateral, based on the contractual requirements for these transactions. FHN’s fixed income business utilizes securities borrowing arrangements as part of its trading operations. Securities borrowing transactions generally require FHN to deposit cash with the securities lender. The amount of cash advanced is recorded within Securities purchased under agreements to resell in the Consolidated Balance Sheets. These transactions are not considered purchases and the securities borrowed are not recognized by FHN. FHN does not conduct securities lending transactions. Securities purchased under agreements to resell and securities borrowing arrangements are evaluated for credit risk each reporting period. As presented in Note 16 - Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions, these agreements are collateralized by the related securities and collateral maintenance provisions with counterparties, including replenishment and adjustment on a transaction specific basis. This collateral
Loans Held-for-Sale	Loans Held for Sale. Loans originated or purchased for which management lacks the intent to hold are included in loans held for sale in the Consolidated Balance Sheets. FHN generally accounts for loans held for sale at the lower of amortized cost or market value (“LOCOM”), with an exception for certain mortgage loans held for sale and repurchased loans that are not governmentally insured which are carried under the fair value option of reporting. On July 1, 2020 as part of the IBKC merger, FHN acquired a portfolio of loans held for sale which consisted of two components: • Fair Value Option Election. These loans, which represent the majority of the IBKC loans held for sale portfolio, consist of fixed rate single-family residential mortgage loans originated by IBKC and committed to be sold in the secondary market. Gains and losses on these mortgage loans are included in mortgage banking and title income.
Loans and Leases, Purchased Credit-Deteriorated Loans, Purchased Credit-Impaired Loans, and Allowance for Loan and Lease Losses	Loans and Leases. Generally, loans are stated at principal amounts outstanding, net of unearned income. Interest on loans is recognized on an accrual basis at the applicable interest rate on the principal amount outstanding. Loan origination fees and direct costs as well as premiums and discounts are amortized as level yield adjustments over the respective loan terms. Unamortized net fees or costs, premiums and discounts are recognized in interest income upon early repayment of the loans. Cash collections from loans that were fully charged off prior to acquisition are recognized in noninterest income. Loan commitment fees are generally deferred and amortized on a straight-line basis over the commitment period. As a result of the IBKC merger, FHN acquired equipment financing leases to commercial customers, which are primarily classified as direct financing and sales-type leases. Equipment financing leases are reported at the net lease investment, which represents the sum of minimum lease payments over the lease term and the estimated residual value, less unearned interest income. Interest income is accrued as earned over the term of the lease based on the net investment in leases. Fees incurred to originate the lease are deferred and recognized as an adjustment of the yield on the lease. FHN also acquired a small amount of loans held for investment in the IBKC merger which are accounted for at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for further discussion of these loans. FHN has elected to exclude accrued interest receivable (“AIR”) from the amortized cost basis on its held-for-investment loan portfolio. FHN has also elected to not measure an allowance for credit losses on AIR for loans held for investment based on its policy to write off uncollectible interest in a timely manner, which occurs when a loan is placed on nonaccrual status. Such write-offs are recognized as a reduction of interest income. AIR for held-for-investment loans is included within Other assets in the Consolidated Balance Sheets. FHN has continued to accrue interest on loans for which payment deferrals have been extended to borrowers affected by the COVID-19 pandemic ("COVID-19 Deferrals"). Deferrals are made for durations up to six months, which is beyond FHN's normal write-off practices for accrued interest. Therefore, these interest deferrals do not qualify for FHN's election to not recognize a credit loss allowance for accrued interest. Accordingly, FHN has estimated credit losses for COVID-19 interest deferrals which is included within AIR in Other assets in the Consolidated Balance Sheets. Purchased Credit-Deteriorated Loans. Subsequent to 2019, at the time of acquisition FHN evaluates all acquired loans to determine if they have experienced a more-than-insignificant deterioration in credit quality since origination (“PCD loans”). PCD loans can be identified on either an 1) individual or 2) pooled basis when the loans share similar risk characteristics. FHN evaluates various absolute factors to assist in the identification of PCD loans, including criteria such as, existing PCD status, risk rating of special mention or lower, nonaccrual or impaired status, identification of prior TDRs, and delinquency status. FHN also utilizes relative factors to identify PCD loans such as commercial loan grade migration, expansion of borrower credit spreads, declines in external risk ratings and changes in consumer loan characteristics (e.g., FICO decline or LTV increase). In addition, factors reflective of broad economic considerations are also considered in identifying PCD loans. These include industry, collateral type, and geographic location for the borrower’s operations. Internal factors for origination of new loans that are similar to the acquired loans are also evaluated to assess loans for PCD status, including increases in required yields, necessity of borrowers’ providing additional collateral and/or guarantees and changes in acceptable loan duration. Other indicators may also be used to evaluate loans for PCD status depending on borrower-specific communications and actions, such public statements, initiation of loan modification discussions and obtaining emergency funding from alternate sources. Upon acquisition, the expected credit losses are allocated to the purchase price of individual PCD loans to determine each individual assets amortized cost basis, typically resulting in a reduction of the discount that is accreted prospectively to interest income. At the acquisition date and prospectively, only the unpaid principal balance is incorporated within the estimation of expected credit losses for PCD loans. Otherwise, the process for estimation of expected credit losses is consistent with that discussed below. As discussed below FHN applies undiscounted cash flow methodologies for the estimation of expected credit losses, which results in the calculated amount of credit losses at acquisition that is added to the amortized cost basis of the related PCD loans to exceed the discounted value of estimated credit losses included in the loan valuation. Purchased Credit-Impaired Loans. Prior to 2020, ASC 310-30 “Accounting for Certain Loans or Debt Securities Acquired in a Transfer,” established guidance for acquired loans that exhibited deterioration of credit quality between origination and the time of acquisition and for which the timely collection of the interest and principal was not reasonably assured (“PCI loans”). PCI loans were initially recorded at fair value which was estimated by discounting expected cash flows at acquisition date. The expected cash flows included all contractually expected amounts (including interest) and incorporated an estimate for future expected credit losses, pre-payment assumptions, and yield requirement for a market participant, among other things. To the extent possible, certain PCI loans were aggregated into pools with composite interest rate and cash flows expected to be collected for the pool. Aggregation into loan pools was based upon common risk characteristics that include similar credit risk or risk ratings, and one or more predominant risk characteristics. Each PCI pool was accounted for as a single unit. Accretable yield was initially established at acquisition and is the excess of cash flows expected at acquisition over the initial investment in the loan and was recognized in interest income over the remaining life of the loan, or pool of loans. Nonaccretable difference was initially established at acquisition and was the difference between the contractually required payments at acquisition and the cash flows expected to be collected at acquisition. FHN estimated expected cash flows for PCI loans on a quarterly basis. Increases in expected cash flows from the last measurement resulted in reversal of any nonaccretable difference (or allowance for loan and lease losses to the extent any has previously been recorded) with a prospective positive impact on interest income. Decreases to the expected cash flows resulted in an increase in the allowance for loan and lease losses through provision expense. FHN did not report PCI loans as nonperforming loans due to the accretion of interest income. Additionally, PCI loans that have been pooled and subsequently modified were not reported as troubled debt restructurings since the pool was the unit of measurement. Subsequent to 2019, PCI loans have transitioned to purchased-credit-deteriorated status and are accounted for as discussed above. Allowance for Credit Losses. The nature of the process by which FHN determines the appropriate ALLL requires the exercise of considerable judgment. See Note 5 - Allowance for Credit Losses for a discussion of FHN’s ALLL methodology and a description of the models utilized in the estimation process for the commercial and consumer loan portfolios. The discussion herein reflects periods before and after implementation of a change in credit loss estimation processes that was effective January 1, 2020. Future adjustments to the ALLL may be necessary if economic or other conditions differ substantially from the assumptions used in making the estimates or, if required by regulators, based upon information at the time of their examinations or upon future regulatory guidance. Such adjustments to original estimates, as necessary, are made in the period in which these factors and other relevant considerations indicate that loss levels vary from previous estimates. Subsequent to 2019 The ALLL is maintained at a level that management determines is sufficient to absorb current expected credit losses (“CECL”) in the loan portfolio. Management uses analytical models to estimate expected credit losses in the loan portfolio as of the balance sheet date. The models are carefully reviewed to identify trends that may not be captured in the modeled loss estimates. Management uses qualitative adjustments for those items not reflected in the modeled loss information such as recent changes from the macroeconomic forecasts utilized in model calculations, results of additional stressed modeling scenarios, observed and/or expected changes affecting borrowers in specific industries or geographic areas, exposure to large lending relationships and expected recoveries of prior charge offs. Loans accounted for at elected fair value are excluded from CECL measurements. The ALLL is increased by the provision for loan and lease losses and is decreased by loan charge-offs. The ALLL is determined in accordance with ASC 326-20 "Financial Instruments - Credit Losses.” Credit loss estimation is based on the amortized cost of Loans, net, which includes the following: 1. Unpaid principal balance for originated assets or acquisition price for purchased assets 2. Accrued interest (see elections discussed previously) 3. Accretion or amortization of premium, discount, and net deferred fees or costs 4. Collection of cash 5. Charge-offs 6. Foreign exchange adjustments (none for FHN) 7. Fair value hedge accounting adjustments (none for FHN) Premiums, discounts and net deferred origination costs/fees affect the calculated amount of expected credit losses but they are not considered when determining the amount of expected credit losses that are recorded. Under CECL, loans must be pooled when they share similar risk characteristics with other loans. Loans that do not share similar risk characteristics are evaluated individually. Expected credit loss is estimated for the remaining life of loan(s), which is limited to the remaining contractual term(s), adjusted for prepayment estimates, which are included as separate inputs into modeled loss estimates. Renewals and extensions are not anticipated unless they are included in existing loan documentation and are not unconditionally cancellable by the lender. However, losses are estimated over the estimated remaining life of reasonably expected TDRs which can extend beyond the current remaining contractual term. Estimates of expected credit losses incorporate consideration of available information that is relevant to assessing the collectability of future cash flows. This includes internal and external information relating to past events, current conditions and reasonable and supportable forecasts of future conditions. FHN utilizes internal historical loss information as the initial point for estimating expected credit losses. Given the duration of historical information available, FHN considers its internal loss history to fully incorporate the effects of prior credit cycles. The historical loss information may be adjusted in situations where current loan characteristics (e.g., underwriting criteria) differ from those in existence at the time the historical losses occurred. Historical loss information is also adjusted for differences in economic conditions, macroeconomic forecasts and other factors management considers relevant over a period extending beyond the measurement date which is considered reasonable and supportable. This reasonable and supportable period is followed by a reversion period after which loss estimates are based on long-term historical loss averages. FHN generally measures expected credit losses using undiscounted cash flow methodologies. Credit enhancements (e.g., guarantors) are considered in the estimation of uncollectible cash flows. Estimation of expected credit losses for loan agreements involving collateral maintenance provisions include consideration of the value of the collateral and replenishment requirements, with the maximum loss limited to the difference between the amortized cost of the loan and the fair value of the collateral. Expected credit losses for loans for which foreclosure is probable are measured at the fair value of collateral, less estimated costs to sell when disposition through sale is anticipated. Additionally, certain loans are valued at the fair value of collateral when repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty. Expected credit losses for TDRs are measured in accordance with ASC 310-40, which generally requires a discounted cash flow methodology, whereby the loans are measured based on the present value of expected future payments discounted at the loan’s original effective interest rate. Expected recoveries of previously charged-off amounts are also included as a qualitative adjustment in the estimation of expected credit losses, which reduces the amount of the allowance recognized. Estimates of recoveries on previously charged-off assets included in the valuation account do not exceed the aggregate of amounts previously written off and expected to be written off. Since CECL requires estimation of credit for the entire expected life of loans, loss estimates are highly sensitive to changes in macroeconomic forecasts, especially when those forecasts change dramatically in short time periods. Additionally, under CECL credit loss estimates are more likely to increase rapidly in periods of loan growth. Expected credit losses for unfunded commitments are estimated for periods where the commitment is not unconditionally cancellable by FHN. The measurement of expected credit losses for unfunded commitments mirrors that of loans with the additional estimate of future draw rates (timing and amount). Prior to 2020 The ALLL was maintained at a level that management determined was sufficient to absorb estimated probable incurred losses in the loan portfolio. The ALLL was increased by the provision for loan losses and loan recoveries and was decreased by loan charge-offs. The ALLL was determined in accordance with ASC 450-20-50 "Contingencies - Accruals for Loss Contingencies" and was composed of reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer and commercial loans. The reserve factors applied to these pools were an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics. Additionally, the ALLL included specific reserves established in accordance with ASC 310-10-35 for loans determined by management to be individually impaired as well as reserves associated with PCI loans. Management used analytical models to estimate probable incurred losses in the loan portfolio as of the balance sheet date. The models, which were primarily driven by historical losses, were carefully reviewed to identify trends that may not have been captured in the historical loss factors used in the models. Management used qualitative adjustments for those items not yet captured in the models like then-current events, recent trends in the portfolio, current underwriting guidelines, and local and macroeconomic trends, among other things. Key components of the estimation process were as follows: (1) commercial loans determined by management to be individually impaired loans were evaluated individually and specific reserves were determined based on the difference between the outstanding loan amount and the estimated net realizable value of the collateral (if collateral dependent), the present value of expected future cash flows or by observable market prices; (2) individual commercial loans not considered to be individually impaired were segmented based on similar credit risk characteristics and evaluated on a pool basis; (3) reserve rates for the commercial segment were calculated based on historical net charge-offs and were subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); (4) management’s estimate of probable incurred losses reflected the reserve rates applied against the balance of loans in the commercial segment of the loan portfolio; (5) consumer loans were generally segmented based on loan type; (6) reserve amounts for each consumer portfolio segment were calculated using analytical models based on delinquency trends and net loss experience and were subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); and (7) the reserve amount for each consumer portfolio segment reflected management’s estimate of probable incurred losses in the consumer segment of the loan portfolio. Impairment related to individually impaired loans was measured in accordance with ASC 310-10. All commercial portfolio segments, commercial TDRs and other individually impaired commercial loans were measured based on the present value of expected future payments discounted at the loan’s effective interest rate (“the DCF method”), observable market prices, or for loans that are solely dependent on the collateral for repayment, the net realizable value (collateral value less estimated costs to sell). Impaired loans also included consumer TDRs.
Allowance for Loan Losses	Allowance for Credit Losses. The nature of the process by which FHN determines the appropriate ALLL requires the exercise of considerable judgment. See Note 5 - Allowance for Credit Losses for a discussion of FHN’s ALLL methodology and a description of the models utilized in the estimation process for the commercial and consumer loan portfolios. The discussion herein reflects periods before and after implementation of a change in credit loss estimation processes that was effective January 1, 2020. Future adjustments to the ALLL may be necessary if economic or other conditions differ substantially from the assumptions used in making the estimates or, if required by regulators, based upon information at the time of their examinations or upon future regulatory guidance. Such adjustments to original estimates, as necessary, are made in the period in which these factors and other relevant considerations indicate that loss levels vary from previous estimates. Subsequent to 2019 The ALLL is maintained at a level that management determines is sufficient to absorb current expected credit losses (“CECL”) in the loan portfolio. Management uses analytical models to estimate expected credit losses in the loan portfolio as of the balance sheet date. The models are carefully reviewed to identify trends that may not be captured in the modeled loss estimates. Management uses qualitative adjustments for those items not reflected in the modeled loss information such as recent changes from the macroeconomic forecasts utilized in model calculations, results of additional stressed modeling scenarios, observed and/or expected changes affecting borrowers in specific industries or geographic areas, exposure to large lending relationships and expected recoveries of prior charge offs. Loans accounted for at elected fair value are excluded from CECL measurements. The ALLL is increased by the provision for loan and lease losses and is decreased by loan charge-offs. The ALLL is determined in accordance with ASC 326-20 "Financial Instruments - Credit Losses.” Credit loss estimation is based on the amortized cost of Loans, net, which includes the following: 1. Unpaid principal balance for originated assets or acquisition price for purchased assets 2. Accrued interest (see elections discussed previously) 3. Accretion or amortization of premium, discount, and net deferred fees or costs 4. Collection of cash 5. Charge-offs 6. Foreign exchange adjustments (none for FHN) 7. Fair value hedge accounting adjustments (none for FHN) Premiums, discounts and net deferred origination costs/fees affect the calculated amount of expected credit losses but they are not considered when determining the amount of expected credit losses that are recorded. Under CECL, loans must be pooled when they share similar risk characteristics with other loans. Loans that do not share similar risk characteristics are evaluated individually. Expected credit loss is estimated for the remaining life of loan(s), which is limited to the remaining contractual term(s), adjusted for prepayment estimates, which are included as separate inputs into modeled loss estimates. Renewals and extensions are not anticipated unless they are included in existing loan documentation and are not unconditionally cancellable by the lender. However, losses are estimated over the estimated remaining life of reasonably expected TDRs which can extend beyond the current remaining contractual term. Estimates of expected credit losses incorporate consideration of available information that is relevant to assessing the collectability of future cash flows. This includes internal and external information relating to past events, current conditions and reasonable and supportable forecasts of future conditions. FHN utilizes internal historical loss information as the initial point for estimating expected credit losses. Given the duration of historical information available, FHN considers its internal loss history to fully incorporate the effects of prior credit cycles. The historical loss information may be adjusted in situations where current loan characteristics (e.g., underwriting criteria) differ from those in existence at the time the historical losses occurred. Historical loss information is also adjusted for differences in economic conditions, macroeconomic forecasts and other factors management considers relevant over a period extending beyond the measurement date which is considered reasonable and supportable. This reasonable and supportable period is followed by a reversion period after which loss estimates are based on long-term historical loss averages. FHN generally measures expected credit losses using undiscounted cash flow methodologies. Credit enhancements (e.g., guarantors) are considered in the estimation of uncollectible cash flows. Estimation of expected credit losses for loan agreements involving collateral maintenance provisions include consideration of the value of the collateral and replenishment requirements, with the maximum loss limited to the difference between the amortized cost of the loan and the fair value of the collateral. Expected credit losses for loans for which foreclosure is probable are measured at the fair value of collateral, less estimated costs to sell when disposition through sale is anticipated. Additionally, certain loans are valued at the fair value of collateral when repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty. Expected credit losses for TDRs are measured in accordance with ASC 310-40, which generally requires a discounted cash flow methodology, whereby the loans are measured based on the present value of expected future payments discounted at the loan’s original effective interest rate. Expected recoveries of previously charged-off amounts are also included as a qualitative adjustment in the estimation of expected credit losses, which reduces the amount of the allowance recognized. Estimates of recoveries on previously charged-off assets included in the valuation account do not exceed the aggregate of amounts previously written off and expected to be written off. Since CECL requires estimation of credit for the entire expected life of loans, loss estimates are highly sensitive to changes in macroeconomic forecasts, especially when those forecasts change dramatically in short time periods. Additionally, under CECL credit loss estimates are more likely to increase rapidly in periods of loan growth. Expected credit losses for unfunded commitments are estimated for periods where the commitment is not unconditionally cancellable by FHN. The measurement of expected credit losses for unfunded commitments mirrors that of loans with the additional estimate of future draw rates (timing and amount). Prior to 2020 The ALLL was maintained at a level that management determined was sufficient to absorb estimated probable incurred losses in the loan portfolio. The ALLL was increased by the provision for loan losses and loan recoveries and was decreased by loan charge-offs. The ALLL was determined in accordance with ASC 450-20-50 "Contingencies - Accruals for Loss Contingencies" and was composed of reserves for commercial loans evaluated based on pools of credit graded loans and reserves for pools of smaller-balance homogeneous consumer and commercial loans. The reserve factors applied to these pools were an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics. Additionally, the ALLL included specific reserves established in accordance with ASC 310-10-35 for loans determined by management to be individually impaired as well as reserves associated with PCI loans. Management used analytical models to estimate probable incurred losses in the loan portfolio as of the balance sheet date. The models, which were primarily driven by historical losses, were carefully reviewed to identify trends that may not have been captured in the historical loss factors used in the models. Management used qualitative adjustments for those items not yet captured in the models like then-current events, recent trends in the portfolio, current underwriting guidelines, and local and macroeconomic trends, among other things. Key components of the estimation process were as follows: (1) commercial loans determined by management to be individually impaired loans were evaluated individually and specific reserves were determined based on the difference between the outstanding loan amount and the estimated net realizable value of the collateral (if collateral dependent), the present value of expected future cash flows or by observable market prices; (2) individual commercial loans not considered to be individually impaired were segmented based on similar credit risk characteristics and evaluated on a pool basis; (3) reserve rates for the commercial segment were calculated based on historical net charge-offs and were subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); (4) management’s estimate of probable incurred losses reflected the reserve rates applied against the balance of loans in the commercial segment of the loan portfolio; (5) consumer loans were generally segmented based on loan type; (6) reserve amounts for each consumer portfolio segment were calculated using analytical models based on delinquency trends and net loss experience and were subject to adjustment by management to reflect current events, trends, and conditions (including economic considerations and trends); and (7) the reserve amount for each consumer portfolio segment reflected management’s estimate of probable incurred losses in the consumer segment of the loan portfolio. Impairment related to individually impaired loans was measured in accordance with ASC 310-10. All commercial portfolio segments, commercial TDRs and other individually impaired commercial loans were measured based on the present value of expected future payments discounted at the loan’s effective interest rate (“the DCF method”), observable market prices, or for loans that are solely dependent on the collateral for repayment, the net realizable value (collateral value less estimated costs to sell). Impaired loans also included consumer TDRs.
Transfers of Financial Assets and Servicing Rights	Transfers of Financial Assets . Transfers of financial assets, or portions thereof which meet the definition of a participating interest, are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when 1) the assets have been legally isolated from FHN, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to FHN, and 3) FHN does not maintain effective control over the transferred assets. If the transfer does not satisfy all three criteria, the transaction is recorded as a secured borrowing. If the transfer is accounted for as a sale, the transferred assets are derecognized from FHN’s balance sheet and a gain or loss on sale is recognized. If the transfer is accounted for as a secured borrowing, the transferred assets remain on FHN’s balance sheet and the proceeds from the transaction are recognized as a liability. Servicing Rights . FHN recognizes the rights to service mortgage and other loans as separate assets, which are recorded in other assets in the Consolidated Balance Sheets, when purchased or when servicing is contractually separated from the underlying loans by sale with servicing rights retained. For loan sales with servicing retained, a servicing right, generally an asset, is recorded at fair value at the time of sale for the right to service the loans sold. All servicing rights are identified by class and amortized over the remaining service life of the loan with periodic reviews for impairment.
Investment Tax Credit	Investment Tax Credit . In conjunction with the IBKC merger, FHN has elected to utilize the deferral method for acquired investments that generate investment tax credits. This includes both solar and historic tax credit investments. Under this approach, the investment tax credits are recognized as a reduction of the related asset rather than income tax expense (benefit).
Equity Compensation	Equity Compensation . As a result of the IBKC merger, as of July 1, 2020, FHN assumed phantom stock awards under various plans to directors, officers, and other key employees.
Summary of Accounting Changes and Accounting Changes Issued But Not Currently Effective	Summary of Accounting Changes. 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., HTM loans and debt securities) and 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 prior GAAP as the “incurred loss” methodology for recognizing credit losses delayed recognition until it was probable a loss had been incurred. Under CECL the full amount of expected credit losses will be recognized at the time of loan origination. The measurement of current expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Additionally, current disclosures of credit quality indicators in relation to the amortized cost of financing receivables are 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 are 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 is 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. Previously, credit losses for purchased credit-impaired assets were included in the initial basis of the assets with subsequent declines in credit resulting in expense while subsequent improvements in credit were reflected as an increase in the future yield from the assets. For non-PCD assets, expected credit losses are recognized through earnings upon acquisition and the entire premium or discount accreted to interest income over the remaining life of the loan. Credit allowances for acquired non-PCD assets are established through immediate recognition of credit loss expense (similar to originated loans) and do not consider purchase discounts related to estimated credit losses. The provisions of ASU 2016-13 were 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 was 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 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 are recorded in earnings when received. A prospective transition approach was used for existing PCD assets where, upon adoption, the amortized cost basis was increased to offset the initial recognition of the allowance for credit losses. Thus, an entity was not required to reassess its purchased financial assets that existed 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 accretes the remaining noncredit discount (based on the revised amortized cost basis) into interest income at the effective interest rate at the adoption date. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. FHN’s most significant implementation activities included review of loan portfolio segments and classes, identification and evaluation of collateral dependent loans and loans secured by collateral replenishment arrangements, selection of measurement methodologies and related model development, data accumulation and verification, development of loan life estimates, identification of reasonable and supportable forecast periods, selection of time lines and methods for reversion to unadjusted historical information, multiple preliminary analysis including parallel runs against existing loan loss estimation processes, and design and evaluation of internal controls over the new estimation processes. FHN utilizes undiscounted cash flow methods for loans except for troubled debt restructurings, which require use of discounted cash flow methodologies. A significant portion of the adoption impact for ASU 2016-13 relates to increased reserves within the consumer portfolios, given the longer contractual maturities associated with many of these products as well as increased reserves for acquired loans that previously considered purchase discounts. Based on its implementation efforts, FHN recorded the following adoption adjustments effective January 1, 2020. (Dollars in thousands) January 1, 2020 Loans and leases (a) $ 2,980 Allowance for loan and lease losses (106,394) Other assets (deferred taxes) 31,330 Total assets $ (72,084) Other liabilities (unfunded commitments) $ 23,973 Undivided profits (96,057) Total liabilities and equity $ (72,084) (a) The effect on loans represents the increase in amortized cost for recognition of the allowance for credit losses on PCD loans. FHN also assessed several asset classes other than loans that are within the scope of CECL and determined that the adoption effects for the change in measurement of credit risk were minimal for these classes. This includes Fed funds sold which have no history of credit losses due to their short (typically overnight) duration and counterparty risk assessment processes. This also includes securities borrowed and securities purchased under agreements to resell which have collateral maintenance agreements that incorporate master netting provisions resulting in minimal uncollateralized positions as of any date as evidenced by the disclosures provided in Note 16 - Master Netting and Similar Agreements-Repurchase, Reverse Repurchase, and Securities Borrowing Transactions. Additionally, FHN also evaluated the composition of its AFS securities and determined that the changes in ASU 2016-13 did not have an effect on the current portfolio. In April 2019, the FASB issued ASU 2019-04, "Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments," which provides an election to either 1) not measure or 2) measure separately an allowance for credit losses for accrued interest receivable (“AIR"). Entities electing to not measure an allowance for AIR must write off uncollectible interest in a timely manner. Additionally, an election is provided for the write off of uncollectible interest to be recorded either as a reversal of interest income or a charge against the allowance for credit losses or a combination of both. Disclosures are required depending upon which elections are made. ASU 2019-04 also clarifies that when loans and securities are transferred between balance sheet categories (e.g., loans from held-for-investment to held-for-sale or securities from held-to-maturity to available-for-sale) the associated allowance for credit losses should be reversed to income and prospective accounting follows the requirements for the new classification. Further, ASU 2019-04 clarifies that recoveries should be incorporated within the estimation of the allowance for credit losses. Expected recoveries should not exceed the aggregate amount of prior write-offs and expected future write-offs. The inclusion of expected recoveries in the measurement of expected credit losses may result in a negative credit allowance in certain circumstances. Additionally, for collateral dependent financial assets, the allowance for credit losses that is added to the amortized cost basis should not exceed amounts previously written off. ASU 2019-04 also makes several changes when a discounted cash flow approach is used to measure expected credit losses. ASU 2019-04 removes ASU 2016-03’s prohibition of using projections of future interest rate environments when using a discounted cash flow method to measure expected credit losses on variable-rate financial instruments. If an entity uses projections or expectations of future interest rate environments in estimating expected cash flows, the same assumptions should be used in determining the effective interest rate used to discount those expected cash flows. The effective interest rate should also be adjusted to consider the effects of expected prepayments on the timing of expected future cash flows. ASU 2019-04 provides an election to adjust the effective interest rate used in discounting expected cash flows to isolate credit risk in measuring the allowance for credit losses. Further, the discount rate should not be adjusted for subsequent changes in expected prepayments if a financial asset is restructured in a troubled debt restructuring. Related to collateral-dependent financial assets, ASU 2019-04 requires inclusion of estimated costs to sell in the measurement of expected credit losses in situations where the entity intends to sell rather than operate the collateral. Additionally, the estimated costs to sell should be undiscounted when the entity intends to sell rather than operate the collateral. Finally, ASU 2019-04 specifies that contractual renewal or extension options, except those treated as derivatives, should be included in the determination of the contractual term for a financial asset when included in the original or modified contract as of the reporting date if they are not unconditionally cancellable by the entity. The effective date and transition requirements for these components of ASU 2019-04 are consistent with the requirements for ASU 2016-13 and FHN incorporated these changes and revisions within its implementation efforts. Based on its previous existing practices for the timely write off uncollectible AIR, FHN elected to not measure an allowance for credit losses for AIR and to continue recognition of related write-offs as a reversal of interest income. In May 2019, the FASB issued ASU 2019-05, “Financial Instruments - Credit Losses, Targeted Transition Relief,” which provides an option to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost basis that are in the scope of ASU 2016-13, applied on an instrument-by-instrument basis. The fair value option election does not apply to HTM debt securities. The effective date and transition requirements for ASU 2019-05 are consistent with the requirements for ASU 2016-13. FHN did not elect to apply the fair value option to any asset classes that are in scope for CECL. In November 2019, the FASB issued ASU 2019-11, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses” which clarifies that expected recoveries should be included in the amortized cost basis previously written off or expected to be written off in the valuation allowance for PCD assets. ASU 2019-11 also clarifies that recoveries or expected recoveries of the unamortized noncredit discount or premium should not be included in the allowance for credit losses. ASU 2019-11 provides specific transition relief for existing troubled debt restructurings and extends the disclosure relief of ASU 2019-04 for accrued interest receivable balances to additional relevant disclosures involving amortized cost basis. Related to the assessment of credit risk for collateralized assets, ASU 2019-11 indicates that an entity should assess whether it reasonably expects the borrower will be able to continually replenish collateral securing the financial asset to apply the practical expedient of ASU 2016-13 while also requiring an estimation of expected credit losses for any difference between the amount of the amortized cost basis that is greater than the fair value of the collateral securing the financial asset. The effective date and transition requirements for ASU 2019-11 are consistent with the requirements for ASU 2016-13 and FHN incorporated these changes and revisions within its implementation efforts and the effects are embedded within the adoption effects of ASU 2016-13. Consistent with non-PCD assets, the effect of including recoveries and expected recoveries within the measurement of expected credit losses for PCD assets may result in a negative credit allowance in certain circumstances. On March 22, 2020, The Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation, the National Credit Union Administration, the Office of the Comptroller of the Currency, and the Consumer Financial Protection Bureau issued guidance (the “Interagency Guidance”) that interprets, but does not suspend, ASC 310-40 related to the identification of troubled debt restructurings (“TDRs”). Also on that day, the FASB issued a statement indicating that the Interagency Guidance had been developed in consultation with the staff of the FASB who concurred with the approach. The Interagency Guidance indicates that a lender can conclude that a borrower is not experiencing financial difficulty if either 1) short-term (e.g., six months) modifications are made in response to the economic effects of the Coronavirus disease 2019 (“COVID-19”) pandemic, such as payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant related to loans in which the borrower is less than 30 days past due on its contractual payments at the time a modification program is implemented, or 2) the modification or deferral program is mandated by the federal government or a state government. Accordingly, any loan modification made in response to COVID-19 pandemic that meets either of these practical expedients would not be considered a TDR because the borrower is not experiencing financial difficulty. Consistent with this perspective, financial institutions are generally not expected to designate loans with deferrals granted due to COVID-19 as past due or nonaccrual because of a deferral. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act provides relief from certain requirements under U.S. GAAP. Section 4013 of the CARES Act provides entities optional temporary relief from the accounting and disclosure requirements for troubled debt restructurings (TDRs) under ASC 310-40 in certain situations. Section 4013 of the CARES Act permits the suspension of ASC 310-40 for loan modifications that are made by financial institutions in response to the COVID-19 pandemic if 1) the borrower was not more than 30 days past due as of December 31, 2019, and 2) the modifications are related to arrangements that defer or delay the payment of principal or interest, or change the interest rate on the loan. The CARES provisions apply to loan modifications relating to COVID-19 that are made between March 1, 2020 and the earlier of December 31, 2020 or 60 days after the national emergency related to COVID-19 ends. On April 3, 2020, the Chief Accountant of the SEC issued a statement indicating that the staff would not object to the conclusion that elective application of the provisions of CARES Act are in accordance with GAAP for the periods that such elections are available. On April 7, 2020, revised Interagency Guidance was issued to reflect the interaction of the CARES Act provisions and the Interagency Guidance, clarifying that the CARES Act guidance can be applied for regulatory purposes. Loan modifications outside the scope of the CARES Act and organizations that elect to not apply the CARES Act guidance should continue to apply ASC 310-40 as interpreted by the Interagency Guidance. FHN has evaluated the provisions of the CARES Act and the Interagency Guidance related to loan modification programs instituted as a result of the COVID-19 pandemic. FHN’s programs primarily involve the deferral of principal and interest payments, fee waivers and mortgage modifications required in response to government modification requirements. With the duration of the economic effects from the pandemic continuing, in third quarter 2020, FHN initiated additional modification programs for extensions of certain borrowers which result in total deferral periods exceeding 6 months or temporary conversion of amortizing loans to interest-only status. Accordingly, FHN has applied the provisions of the CARES Act to its most recent modification programs. Accounting Changes Issued but Not Currently Effective In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting” which provides several optional expedients and exceptions to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The provisions of ASU 2020-04 primarily affect 1) contract modifications (e.g., loans, leases, debt, and derivatives) made in anticipation that a reference rate (e.g., LIBOR) will be discontinued and 2) the application of hedge accounting for existing relationships affected by those modifications. The provisions of ASU 2020-04 are effective upon release and apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by ASU 2020-04 do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. FHN has been identifying contracts affected by reference rate reform and developing modification plans for those contracts. FHN anticipates that it will utilize the optional expedients and exceptions provided by ASU 2020-04 in situations where

Financial Information (Tables)

Financial Information (Tables)	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Adoption Adjustments	Based on its implementation efforts, FHN recorded the following adoption adjustments effective January 1, 2020. (Dollars in thousands) January 1, 2020 Loans and leases (a) $ 2,980 Allowance for loan and lease losses (106,394) Other assets (deferred taxes) 31,330 Total assets $ (72,084) Other liabilities (unfunded commitments) $ 23,973 Undivided profits (96,057) Total liabilities and equity $ (72,084) (a) The effect on loans represents the increase in amortized cost for recognition of the allowance for credit losses on PCD loans.

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following schedule details a preliminary allocation of merger consideration to the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed from IBKC as of July 1, 2020. (Dollars in thousands) IBERIABANK Corporation Assets: Cash and due from banks $ 129,553 Interest-bearing deposits with banks 1,947,933 Securities available for sale at fair value 3,544,364 Loans held for sale 319,743 Loans and leases (a) 25,917,828 Allowance for loan and lease losses (284,457) Other intangible assets 237,763 Premises and equipment 310,617 Other real estate owned ("OREO") 8,593 Other assets 1,126,786 Total assets acquired $ 33,258,723 Liabilities: Deposits 28,231,609 Short-term borrowings 208,733 Term borrowings 1,199,533 Other liabilities 585,143 Total liabilities assumed $ 30,225,018 Net assets acquired $ 3,033,705 Consideration paid: Consideration for outstanding common stock 2,242,611 Consideration for equity awards 28,291 Consideration for preferred stock 230,641 Cash in lieu of fractional shares 12 Total consideration paid $ 2,501,555 Preliminary purchase accounting gain $ (532,150) (a) Includes $1.3 billion of initial net investments in sales-type and direct financing leases. The following schedule details a preliminary allocation of merger consideration to the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed from Truist Bank as of July 17, 2020. (Dollars in thousands) Truist Bank Assets: Cash and due from banks $ 2,201,685 Loans and leases 423,397 Allowance for loan and lease losses (2,355) Other intangible assets 7,000 Premises and equipment 10,965 Other assets 27,700 Total assets acquired $ 2,668,392 Liabilities: Deposits 2,194,870 Other liabilities 29,733 Total liabilities assumed $ 2,224,603 Net assets acquired $ 443,789 Consideration paid: Cash 521,433 Total consideration paid $ 521,433 Preliminary goodwill $ 77,644
Business Acquisition, Pro Forma Information	The following table presents unaudited pro forma information as if the transaction occurred on January 1, 2019. The pro forma information does not necessarily reflect the results of operations that would have occurred had the two companies combined on January 1, 2019. Furthermore, cost savings and other business synergies related to the transaction are not reflected in the pro forma amounts. Actual from acquistion date through September 30, 2020 Unaudited Pro Forma Information for the (Dollars in thousands) Three Months Ended September 30, 2020 Three Months Ended September 30, 2019 (a) Nine Months Ended September 30, 2020 Nine Months Ended September 30, 2019 (a) Net interest income $ 222,912 $ 550,636 $ 566,174 $ 1,691,623 $ 1,711,502 Noninterest income 89,510 290,773 235,409 783,132 645,781 Net income (loss) (41,750) 71,162 218,572 359,214 654,884 (a) Three and nine months ended September 30, 2019 does not include the impact of CECL which was adopted January 1, 2020.
Merger And Integration Expense	Total merger and integration expenses for the IBKC merger recognized for the three and nine months ended September 30, 2020 are presented in the table below: (Dollars in thousands) Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 Legal and professional fees (a) $ 29,984 $ 34,394 Personnel expense (b) 34,846 40,240 Contribution expense (c) 20,000 20,000 Miscellaneous expense (d) 11,138 12,395 Total IBKC acquisition expense $ 95,968 $ 107,029 (a) Primarily comprised of fees for legal, accounting, and merger consultants. (b) Primarily comprised of fees for severance and retention. (c) Comprised of contribution expense related to the establishment of the First Horizon Louisiana Foundation. (d) Primarily comprised of fees for travel and entertainment, contract employment, contributions and other miscellaneous expenses. Total other merger and integration expense recognized for the three and nine months ended September 30, 2020 and 2019 are presented in the table below: Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Legal and professional fees (a) $ 1,196 $ 3,507 $ 3,322 $ 9,852 Personnel expense (b) 303 1,473 786 4,462 Contract employment and outsourcing (c) 203 223 929 240 Net occupancy expense (d) 449 (76) 342 1,547 Miscellaneous expense (e) 951 1,022 2,276 2,170 All other expense (f) 1,723 2,840 6,207 5,025 Total $ 4,825 $ 8,989 $ 13,862 $ 23,296 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Primarily comprised of fees for legal, accounting, 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 expenses associated with lease exits. (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, internal technology development costs, costs of shareholder matters and asset impairments, as well as other miscellaneous expenses.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Marketable Securities [Abstract]
Schedule of FHN's Investment Securities	The following tables summarize FHN’s investment securities on September 30, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Amortized Gross Gross Fair Securities available for sale: U.S. treasuries $ 300,037 $ — $ (3) $ 300,034 Government agency issued mortgage-backed securities (“MBS”) 3,731,490 97,734 (2,158) 3,827,066 Government agency issued collateralized mortgage obligations (“CMO”) 2,675,192 31,694 (1,439) 2,705,447 Other U.S. government agencies 644,328 13,942 (4) 658,266 Corporates and other debt 39,936 74 — 40,010 States and municipalities 421,754 10,342 (6) 432,090 $ 7,812,737 $ 153,786 $ (3,610) 7,962,913 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (a) 32,959 Total securities available for sale (b) $ 7,995,872 (a) SBA-interest only strips are recorded at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for additional information. (b) Includes $5.7 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. December 31, 2019 (Dollars in thousands) Amortized Gross Gross Fair Securities available for sale: U.S. treasuries $ 100 $ — $ — $ 100 Government agency issued MBS 2,316,381 34,692 (2,556) 2,348,517 Government agency issued CMO 1,667,773 9,916 (7,197) 1,670,492 Other U.S. government agencies 303,463 3,750 (1,121) 306,092 Corporates and other debt 40,054 486 — 40,540 States and municipalities 57,232 3,324 (30) 60,526 $ 4,385,003 $ 52,168 $ (10,904) 4,426,267 AFS debt securities recorded at fair value through earnings: SBA-interest only strips (a) 19,136 Total securities available for sale (b) $ 4,445,403 (a) SBA-interest only strips are recorded at elected fair value. See Note 17 - Fair Value of Assets and Liabilities for additional information. (b) Includes $3.8 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
Schedule of Amortized Cost And Fair Value By Contractual Maturity	The amortized cost and fair value by contractual maturity for the available-for-sale debt securities portfolios on September 30, 2020 are provided below: Available-for-Sale (Dollars in thousands) Amortized Fair Within 1 year $ 453,324 $ 455,069 After 1 year; within 5 years 192,172 196,096 After 5 years; within 10 years 152,870 160,078 After 10 years 607,689 619,157 Subtotal 1,406,055 1,430,400 Government agency issued MBS and CMO (a) 6,406,682 6,532,513 Total $ 7,812,737 $ 7,962,913 (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, 2020 and 2019. Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Gross gains on sales of debt securities $ 1,442 $ — $ 1,442 $ — Gross (losses) on sales of debt securities (2,765) — (2,765) (267) Net gains (losses) on sales of debt securities (a) $ (1,323) $ — $ (1,323) $ (267) (a) Cash proceeds for the three and nine months ended September 30, 2020 were not material. Cash proceeds for the three months ended September 30, 2019, were not material. Cash proceeds for the nine months ended September 30, 2019 were
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, 2020 and December 31, 2019: As of September 30, 2020 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. treasuries $ 299,934 $ (3) $ — $ — $ 299,934 $ (3) Government agency issued MBS 568,733 (2,158) — — 568,733 (2,158) Government agency issued CMO 636,386 (1,439) — — 636,386 (1,439) Other U.S. government agencies 30,896 (4) $ — $ — 30,896 (4) States and municipalities 5,191 (6) — — 5,191 (6) Total temporarily impaired securities $ 1,541,140 $ (3,610) $ — $ — $ 1,541,140 $ (3,610) As of December 31, 2019 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. treasuries $ — $ — $ 100 $ — $ 100 $ — Government agency issued MBS 174,983 (495) 192,755 (2,061) 367,738 (2,556) Government agency issued CMO 378,815 (1,970) 361,124 (5,227) 739,939 (7,197) Other U.S. government agencies 98,471 (1,121) — — 98,471 (1,121) States and municipalities 3,551 (30) — — 3,551 (30) Total temporarily impaired securities $ 655,820 $ (3,616) $ 553,979 $ (7,288) $ 1,209,799 $ (10,904)

Loans and Leases (Tables)

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Schedule Of Loans By Portfolio Segment	The following table provides the amortized cost basis of loans and leases by portfolio segment and class as of September 30, 2020 and December 31, 2019, excluding accrued interest of $177.5 million and $84.6 million, which is included in Other assets in the Consolidated Balance Sheets. September 30, December 31, (Dollars in thousands) 2020 2019 Commercial: Commercial and industrial (a) $ 28,048,649 $ 15,640,208 Loans to mortgage companies 5,607,068 4,410,883 Total commercial, financial, and industrial 33,655,717 20,051,091 Commercial real estate 12,510,887 4,337,017 Consumer: HELOC 2,549,837 1,287,441 R/E installment loans 9,778,032 4,889,698 Total consumer real estate 12,327,869 6,177,139 Credit card and other 1,212,058 495,864 Loans and leases $ 59,706,531 $ 31,061,111 Allowance for loan and lease losses (988,102) (200,307) Net loans and leases $ 58,718,429 $ 30,860,804 (a) September 30, 2020 balance includes equipment financing leases of $524.2 million.
Financing Receivable Credit Quality Indicators	The following tables provide the amortized cost basis of the commercial loan portfolio by year of origination and credit quality indicator as of September 30, 2020: C&I (Dollars in thousands) 2020 2019 2018 2017 2016 Prior to 2016 LMC (a) Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) (c) $ 7,795,816 $ 5,770,378 $ 3,036,673 $ 1,917,886 $ 1,323,236 $ 2,414,920 $ 5,607,068 $ 4,533,240 $ 60,592 $ 32,459,809 Special Mention (PD grade 13) 86,675 75,224 53,067 22,692 45,640 80,438 — 123,383 47,364 534,483 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 107,126 111,716 109,639 50,811 60,082 46,871 — 165,173 10,007 661,425 Total C&I loans $ 7,989,617 $ 5,957,318 $ 3,199,379 $ 1,991,389 $ 1,428,958 $ 2,542,229 $ 5,607,068 $ 4,821,796 $ 117,963 $ 33,655,717 (a) LMC includes non-revolving 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. The loans are of short duration with maturities less than one year. (b) $40.0 million of C&I loans were converted from revolving to term in 2020. (c) 2020 balance includes PPP loans. CRE (Dollars in thousands) 2020 2019 2018 2017 2016 prior to 2016 Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) 2,099,167 3,244,741 1,940,046 1,410,004 1,056,094 2,015,504 300,752 18,836 12,085,144 Special Mention (PD grade 13) 15,089 31,230 97,016 35,573 83,254 45,875 4,065 — 312,102 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 676 2,481 22,018 41,211 8,180 31,746 7,329 — 113,641 Total CRE loans 2,114,932 3,278,452 2,059,080 1,486,788 1,147,528 2,093,125 312,146 18,836 12,510,887 The following table provides the balances of commercial loan portfolio classes with associated allowance, disaggregated by PD grade as of December 31, 2019. December 31, 2019 (Dollars in thousands) C&I Loans to CRE Total Percentage Allowance PD Grade: Pass (PD grades 1 through 12) (a) $ 15,035,946 $ 4,410,883 $ 4,252,361 $ 23,699,190 98 % $ 114,094 Special Mention (PD grade 13) 232,823 — 34,092 266,915 1 8,142 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 263,076 — 44,026 307,102 1 29,318 Collectively evaluated for impairment 15,531,845 4,410,883 4,330,479 24,273,207 100 151,554 Individually evaluated for impairment 82,438 — 1,563 84,001 — 6,196 Purchased credit-impaired loans 25,925 — 4,975 30,900 — 848 Total commercial loans $ 15,640,208 $ 4,410,883 $ 4,337,017 $ 24,388,108 100 % $ 158,598 (a) Balances presented net of a $19.1 million valuation allowance. The following table reflects the amortized cost basis by year of origination and refreshed FICO scores for consumer real estate loans as of September 30, 2020. Within consumer real estate, classes include home equity line of credit ("HELOC") and real estate installment. HELOCs are loans which during their draw period are classified as revolving loans. Once the draw period ends and the loan enters its repayment period, the loan converts to a term loan and is classified as revolving loans converted to term loans. All loans classified in the following table as revolving loans or revolving loans converted to term loans are HELOCs. Real estate installment loans are originated as a fixed term loan and are classified below in their vintage year from prior to 2016 to 2020. All loans in the following table classified in a vintage year are real estate installment loans. Consumer Real Estate (Dollars in thousands) 2020 2019 2018 2017 2016 Prior to 2016 Revolving Revolving Total FICO score 740 or greater $ 809,079 $ 1,242,805 $ 797,553 $ 677,865 $ 746,150 $ 1,910,304 $ 1,304,498 $ 178,921 $ 7,667,175 FICO score 720-739 96,670 168,223 110,859 81,669 93,933 205,824 204,419 30,342 991,939 FICO score 700-719 84,995 122,293 89,193 84,727 73,587 225,227 181,823 39,361 901,206 FICO score 660-699 88,346 146,789 143,213 88,989 91,062 316,577 263,818 63,156 1,201,950 FICO score 620-659 21,847 73,365 40,104 28,207 36,391 140,682 87,205 39,707 467,508 FICO score less than 620 357,712 48,100 53,006 61,476 97,995 323,215 99,561 57,026 1,098,091 Total $ 1,458,649 $ 1,801,575 $ 1,233,928 $ 1,022,933 $ 1,139,118 $ 3,121,829 $ 2,141,324 $ 408,513 $ 12,327,869 (a) $22.7 million of HELOC loans were converted from revolving to term in 2020. The following table reflects the amortized cost basis by year of origination and refreshed FICO scores for credit card and other loans as of September 30, 2020. Credit Card and Other (Dollars in thousands) 2020 2019 2018 2017 2016 Prior to 2016 Revolving Revolving Total FICO score 740 or greater $ 45,014 $ 60,629 $ 67,379 $ 44,445 $ 27,990 $ 129,793 $ 143,754 $ 5,263 $ 524,267 FICO score 720-739 6,617 8,673 10,856 9,913 9,051 29,740 90,623 1,630 167,103 FICO score 700-719 6,172 9,215 9,903 8,635 4,567 42,102 41,039 1,731 123,364 FICO score 660-699 27,173 14,206 16,352 11,032 10,600 53,772 54,963 3,737 191,835 FICO score 620-659 3,526 5,559 7,990 5,761 12,823 29,168 19,492 1,406 85,725 FICO score less than 620 22,715 7,406 16,024 10,876 9,432 28,960 22,835 1,516 119,764 Total $ 111,217 $ 105,688 $ 128,504 $ 90,662 $ 74,463 $ 313,535 $ 372,706 $ 15,283 $ 1,212,058 (a) $5.3 million of other consumer loans were converted from revolving to term in 2020. The following table reflects the percentage of balances outstanding, by average refreshed FICO scores, for the HELOC and real estate installment classes of loans as of December 31, 2019. December 31, 2019 (Dollars in thousands) HELOC R/E Installment Loans (b) FICO score 740 or greater 62.0 % 71.9 % FICO score 720-739 8.6 8.3 FICO score 700-719 7.6 6.3 FICO score 660-699 10.8 8.1 FICO score 620-659 4.7 2.8 FICO score less than 620 (a) 6.3 2.6 Total 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 and leases by class on September 30, 2020: Accruing Non-Accruing (Dollars in thousands) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) (b) $ 27,815,798 $ 19,892 $ 149 $ 27,835,839 $ 126,674 $ 25,327 $ 60,809 $ 212,810 $ 28,048,649 Loans to mortgage companies 5,607,068 — — 5,607,068 — — — — 5,607,068 Total commercial and industrial 33,422,866 19,892 149 33,442,907 126,674 25,327 60,809 212,810 33,655,717 Commercial real estate: CRE 12,444,693 15,133 — 12,459,826 42,517 2,531 6,013 51,061 12,510,887 Consumer real estate: HELOC 2,467,907 11,884 6,892 2,486,683 47,101 4,628 11,425 63,154 2,549,837 R/E installment loans 9,631,513 22,922 6,663 9,661,098 54,606 3,394 58,934 116,934 9,778,032 Total consumer real estate 12,099,420 34,806 13,555 12,147,781 101,707 8,022 70,359 180,088 12,327,869 Credit card and other: Credit card 267,880 1,513 789 270,182 242 38 49 329 270,511 Other 936,179 2,698 122 938,999 963 682 903 2,548 941,547 Total credit card and other 1,204,059 4,211 911 1,209,181 1,205 720 952 2,877 1,212,058 Total loans and leases, net of unearned income $ 59,171,038 $ 74,042 $ 14,615 $ 59,259,695 $ 272,103 $ 36,600 $ 138,133 $ 446,836 $ 59,706,531 (a) $125.7 million of C&I loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance. (b) C&I loans include $209.4 million in TRUPs loans, which are presented net of an amortizing discount of $18.2 million. The following table reflects accruing and non-accruing loans by class on December 31, 2019: Accruing Non-Accruing (Dollars in thousands) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) $ 15,532,579 $ 7,155 $ 237 $ 15,539,971 $ 36,564 $ 14,385 $ 23,363 $ 74,312 $ 15,614,283 Loans to mortgage companies 4,410,883 — — 4,410,883 — — — — 4,410,883 Purchased credit-impaired loans 23,840 287 1,798 25,925 — — — — 25,925 Total commercial and industrial 19,967,302 7,442 2,035 19,976,779 36,564 14,385 23,363 74,312 20,051,091 Commercial real estate: CRE 4,329,531 686 — 4,330,217 — 485 1,340 1,825 4,332,042 Purchased credit-impaired loans 4,752 128 95 4,975 — — — — 4,975 Total commercial real estate 4,334,283 814 95 4,335,192 — 485 1,340 1,825 4,337,017 Consumer real estate: HELOC 1,217,344 9,156 5,669 1,232,169 43,007 4,227 7,472 54,706 1,286,875 R/E installment loans 4,812,446 12,894 9,170 4,834,510 20,710 1,076 9,202 30,988 4,865,498 Purchased credit-impaired loans 18,720 2,770 3,276 24,766 — — — — 24,766 Total consumer real estate 6,048,510 24,820 18,115 6,091,445 63,717 5,303 16,674 85,694 6,177,139 Credit card and other: Credit card 198,917 1,076 1,178 201,171 — — — — 201,171 Other 291,700 1,802 337 293,839 101 44 189 334 294,173 Purchased credit-impaired loans 323 98 99 520 — — — — 520 Total credit card and other 490,940 2,976 1,614 495,530 101 44 189 334 495,864 Total loans and leases, net of unearned income $ 30,841,035 $ 36,052 $ 21,859 $ 30,898,946 $ 100,382 $ 20,217 $ 41,566 $ 162,165 $ 31,061,111 Certain previously reported amounts have been reclassified to agree with current presentation. (a) C&I loans include $218.3 million in TRUPs loans, which are presented net of an amortizing discount of $19.1 million.
Schedule Of Troubled Debt Restructurings Occurring During The Year	The following tables present the end of period balance for loans modified in a TDR during the periods indicated: Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 (Dollars in thousands) Number Pre-Modification Post-Modification Number Pre-Modification Post-Modification Commercial, financial, and industrial: C&I 83 $ 130,281 $ 119,591 87 $ 140,857 $ 128,723 Total commercial and industrial 83 130,281 119,591 87 140,857 128,723 Commercial real estate: CRE 14 11,848 11,825 14 11,848 11,825 Total commercial real estate 14 11,848 11,825 14 11,848 11,825 Consumer real estate: HELOC 35 2,623 2,584 47 3,687 3,626 R/E installment loans 44 6,075 6,022 94 15,379 15,260 Total consumer real estate 79 8,698 8,606 141 19,066 18,886 Credit card and other 10 80 76 50 334 313 Total troubled debt restructurings 186 $ 150,907 $ 140,098 292 $ 172,105 $ 159,747 Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 (Dollars in thousands) Number Pre-Modification Post-Modification Number Pre-Modification Post-Modification Commercial, financial, and industrial: C&I 1 $ 62 $ 59 4 $ 14,179 $ 14,101 Total commercial and industrial 1 62 59 4 14,179 14,101 Consumer real estate: HELOC 13 1,638 1,631 57 7,013 6,950 R/E installment loans 16 1,771 1,854 82 10,730 10,790 Total consumer real estate 29 3,409 3,485 139 17,743 17,740 Credit card and other 35 134 126 68 317 300 Total troubled debt restructurings 65 $ 3,605 $ 3,670 211 $ 32,239 $ 32,141
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, 2020 and 2019, a nd 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, 2020 Nine Months Ended September 30, 2020 (Dollars in thousands) Number Recorded Number Recorded Commercial (C&I): General C&I — $ — — $ — Total commercial (C&I) — — — — Consumer real estate: HELOC 1 32 8 34 R/E installment loans 6 839 16 841 Total consumer real estate 7 871 24 875 Credit card & other 7 24 21 24 Total troubled debt restructurings 14 $ 895 45 $ 899 Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 (Dollars in thousands) Number Recorded Number Recorded Commercial (C&I): General C&I — $ — — $ — Total commercial (C&I) — — — — Consumer real estate: HELOC 2 99 4 198 R/E installment loans 1 7 2 45 Total consumer real estate 3 106 6 243 Credit card & other 8 45 23 77 Total troubled debt restructurings 11 $ 151 29 $ 320
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price	For PCD loans acquired or purchased during the third quarter of 2020, a reconciliation of the unpaid principal balance, contractual cash flow owed to FHN at acquisition date, and purchase price is presented in the following table. Three Months Ended September 30, 2020 (Dollars in thousands) C&I CRE Consumer Real Estate Credit Card and Other Total Par value (UPB) $ 4,074,927 $ 6,435,556 $ 2,393,677 $ 192,980 $ 13,097,140 Allowance for Loan Losses (a) (137,702) (100,123) (44,141) (4,845) (286,811) (Discount) Premium (64,328) 3,485 (31,764) (3) (92,610) Purchase Price $ 3,872,897 $ 6,338,918 $ 2,317,772 $ 188,132 $ 12,717,719
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Accretable Yield Movement Schedule Rollforward	The following table presents a rollforward of the accretable yield for the year ended December 31, 2019: Year Ended (Dollars in thousands) 2019 Balance, beginning of period $ 13,375 Accretion (5,792) Adjustment for payoffs (2,438) Adjustment for charge-offs (479) Adjustment for pool excess recovery (a) — Increase in accretable yield (b) 5,513 Disposals (4) Other (367) Balance, end of period $ 9,808 (a) Represents the removal of accretable difference for the remaining loans in a pool which is now in a recovery state. (b) Includes changes in the accretable yield due to both transfers from the nonaccretable difference and the impact of changes in the expected timing of the cash flows.
Schedule of Acquired Purchase Credit Impaired Loans by Portfolio Segment	The following table reflects the outstanding principal balance and carrying amounts of the acquired PCI loans as of December 31, 2019: December 31, 2019 (Dollars in thousands) Carrying value Unpaid balance Commercial, financial and industrial $ 24,973 $ 25,938 Commercial real estate 5,078 5,466 Consumer real estate 23,681 26,245 Credit card and other 489 567 Total $ 54,221 $ 58,216
Information By Class Related To Individually Impaired Loans	The following tables provide additional disclosures previously required by ASC Topic 310 related to FHN's December 31, 2019 balances. Information on impaired loans at December 31, 2019 was as follows: December 31, 2019 (Dollars in thousands) Recorded Unpaid Related Impaired loans with no related allowance recorded: Commercial: C&I $ 52,672 $ 63,602 $ — CRE 1,563 1,563 — Total $ 54,235 $ 65,165 $ — Consumer: HELOC (a) $ 4,940 $ 10,438 $ — R/E installment loans (a) 7,593 10,054 — Total $ 12,533 $ 20,492 $ — Impaired loans with related allowance recorded: Commercial: C&I $ 29,766 $ 31,536 $ 6,196 CRE — — — Total $ 29,766 $ 31,536 $ 6,196 Consumer: HELOC $ 55,522 $ 59,122 $ 7,016 R/E installment loans 94,191 104,121 12,282 Credit card & other 653 653 422 Total $ 150,366 $ 163,896 $ 19,720 Total commercial $ 84,001 $ 96,701 $ 6,196 Total consumer $ 162,899 $ 184,388 $ 19,720 Total impaired loans $ 246,900 $ 281,089 $ 25,916 (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 2019 2019 (Dollars in thousands) Average Interest Average Interest Impaired loans with no related allowance recorded: Commercial: C&I $ 64,558 $ 173 $ 62,553 $ 530 Loans to mortgage companies 18,628 — 12,419 — CRE 1,690 3 1,576 30 Total $ 84,876 $ 176 $ 76,548 $ 560 Consumer: HELOC (a) $ 6,495 $ — $ 6,852 $ — R/E installment loans (a) 8,147 — 8,564 — Total $ 14,642 $ — $ 15,416 $ — Impaired loans with related allowance recorded: Commercial: C&I $ 14,620 $ 4 $ 10,892 $ 4 TRUPS 2,750 — 2,806 — CRE 169 — 294 9 Total $ 17,539 $ 4 $ 13,992 $ 13 Consumer: HELOC $ 60,312 $ 449 $ 62,650 $ 1,475 R/E installment loans 102,576 787 106,175 2,424 Credit card & other 710 4 697 13 Total $ 163,598 $ 1,240 $ 169,522 $ 3,912 Total commercial $ 102,415 $ 180 $ 90,540 $ 573 Total consumer $ 178,240 $ 1,240 $ 184,938 $ 3,912 Total impaired loans $ 280,655 $ 1,420 $ 275,478 $ 4,485 (a) All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance.

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Rollforward Of The Allowance For Loan Losses By Portfolio Segment	The following table provides a rollforward of the ALLL and RULC by portfolio type for the three and nine months ended September 30, 2020 and 2019: (Dollars in thousands) Commercial, Financial, and Industrial (a) Commercial Real Estate Consumer Real Estate Credit Card and Other Total Allowance for loan and lease losses: Balance as of July 1, 2020 $ 318,722 $ 57,285 $ 143,757 $ 18,117 $ 537,881 Charge-offs (b) (69,448) (3,540) (1,834) (3,519) (78,341) Recoveries 3,200 2,243 5,311 997 11,751 Initial allowance on loans purchased with credit deterioration (b) 137,702 100,123 44,141 4,845 286,811 Provision for loan and lease losses (c) 98,918 51,847 74,055 5,180 230,000 Balance as of September 30, 2020 489,094 207,958 265,430 25,620 988,102 Reserve for remaining unfunded commitments: Balance as of July 1, 2020 36,388 6,359 7,714 — 50,461 Initial reserve on loans acquired 11,760 26,306 3,185 8 41,259 Provision/(provision credit) for remaining unfunded commitments (1,509) (1,671) 180 — (3,000) Balance as of September 30, 2020 46,639 30,994 11,079 8 88,720 Allowance for loan and lease losses: Balance as of January 1, 2020 122,486 36,112 28,443 13,266 200,307 Adoption of ASU 2016-13 18,782 (7,348) 92,992 1,968 106,394 Balance as of January 1, 2020, as adjusted 141,268 28,764 121,435 15,234 306,701 Charge-offs (b) (94,400) (4,182) (6,112) (10,007) (114,701) Recoveries 5,208 2,972 12,853 3,258 24,291 Initial allowance on loans purchased with credit deterioration (b) 137,702 100,123 44,141 4,845 286,811 Provision for loan and lease losses (c) 299,316 80,281 93,113 12,290 485,000 Balance as of September 30, 2020 $ 489,094 $ 207,958 $ 265,430 $ 25,620 $ 988,102 Reserve for remaining unfunded commitments: Balance as of January 1, 2020 3,590 2,356 16 139 6,101 Adoption of ASU 2016-13 16,512 1,276 6,323 (139) 23,972 Balance as of January 1, 2020, as adjusted 20,102 3,632 6,339 — 30,073 Initial reserve on loans acquired 11,760 26,306 3,185 8 41,259 Provision for remaining unfunded commitments 14,777 1,056 1,555 — 17,388 Balance as of September 30, 2020 $ 46,639 $ 30,994 $ 11,079 $ 8 $ 88,720 Allowance for loan losses: Balance as of July 1, 2019 $ 116,096 $ 32,953 $ 31,532 $ 12,168 $ 192,749 Charge-offs (18,598) (369) (1,473) (3,897) (24,337) Recoveries 3,245 181 5,055 1,256 9,737 Provision/(provision credit) for loan losses 13,387 2,860 (4,440) 3,193 15,000 Balance as of September 30, 2019 114,130 35,625 30,674 12,720 193,149 Reserve for remaining unfunded commitments: Balance as of July 1, 2019 4,231 3,149 20 125 7,525 Provision/(provision credit) for remaining unfunded commitments (406) (231) (5) 7 (635) Balance as of September 30, 2019 3,825 2,918 15 132 6,890 Allowance for loan losses: Balance as of January 1, 2019 98,947 31,311 37,439 12,727 180,424 Charge-offs (28,289) (924) (5,991) (11,883) (47,087) Recoveries 4,593 150 14,621 3,448 22,812 Provision/(provision credit) for loan losses 38,879 5,088 (15,395) 8,428 37,000 Balance as of September 30, 2019 114,130 35,625 30,674 12,720 193,149 Reserve for remaining unfunded commitments: Balance as of January 1, 2019 4,240 3,242 27 109 7,618 Provision/(provision credit) for remaining unfunded commitments (415) (324) (12) 23 (728) Balance as of September 30, 2019 $ 3,825 $ 2,918 $ 15 $ 132 $ 6,890 (a) C&I loans as of September 30, 2020 include $4.2 billion in PPP loans which due to the government guarantee and forgiveness provisions are considered to have no credit risk and therefore have no allowance for loan and lease losses. (b) The three and nine month periods ended September 30, 2020 exclude day 1 charge-offs and the related initial allowance on PCD loans is net of these amounts. Under the new CECL standard, the initial ALLL recognized on PCD assets included an additional $237.3 million for charged-off loans that had been written off prior to acquisition (whether full or partial) or which met FHN's charge-off policy at the time of acquisition. After charging these amounts off immediately upon acquisition, the net impact was 286.8 million of additional ALLL for PCD loans.

Mortgage Banking Activity (Tabl

Mortgage Banking Activity (Tables)	9 Months Ended
	Sep. 30, 2020
Mortgage Banking [Abstract]
Servicing Asset at Amortized Cost	Mortgage servicing rights had the following carrying values as of the period indicated. September 30, 2020 (Dollars in thousands) Gross Carrying Amount Valuation Allowance Accumulated Amortization Net Carrying Amount Mortgage servicing rights 22,142 (61) (1,413) 20,668

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
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 Balance Sheets as of September 30, 2020 and December 31, 2019. (Dollars in thousands) Regional Fixed Total December 31, 2018 $ 1,289,819 $ 142,968 $ 1,432,787 Additions — — — September 30, 2019 $ 1,289,819 $ 142,968 $ 1,432,787 December 31, 2019 $ 1,289,819 $ 142,968 $ 1,432,787 Additions 77,644 — 77,644 September 30, 2020 $ 1,367,463 $ 142,968 $ 1,510,431
Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition	The following table, which excludes fully amortized intangibles, presents other intangible assets included in the Consolidated Balance Sheets: September 30, 2020 December 31, 2019 (Dollars in thousands) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Core deposit intangibles $ 370,850 $ (68,902) $ 301,948 $ 157,150 $ (47,372) $ 109,778 Customer relationships 37,000 (7,037) 29,963 77,865 (60,150) 17,715 Other (a) 38,685 (4,896) 33,789 5,622 (2,915) 2,707 Total $ 446,535 $ (80,835) $ 365,700 $ 240,637 $ (110,437) $ 130,200 (a) Includes noncompete covenants, purchased credit card intangible assets, and state banking licenses not subject to amortization.
Schedule of Estimated Aggregate Amortization Expense for Intangible Assets	As of September 30, 2020 the estimated aggregated amortization expense is expected to be: (Dollars in thousands) Year Amortization Remainder of 2020 $ 14,921 2021 55,943 2022 51,498 2023 47,859 2024 44,040 2025 37,145

Preferred Stock (Tables)

Preferred Stock (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Schedule of Stock by Class	The following table presents a summary of FHN's non-cumulative perpetual preferred stock: September 30, 2020 December 31, 2019 (dollars in thousands) Issuance Date Earliest Redemption Date* Annual Dividend Rate Liquidation Amount Carrying Amount Carrying Amount Series A Preferred Stock 1/31/2013 4/10/2018 6.200 % $ 100,000 $ 95,624 $ 95,624 Series B Preferred Stock 7/2/2020 8/1/2025 6.625 % 80,000 77,348 — Series C Preferred Stock 7/2/2020 5/1/2026 6.600 % 57,500 59,084 — Series D Preferred Stock 7/2/2020 5/1/2024 6.100 % 100,000 93,649 — Series E Preferred Stock 5/28/2020 10/10/2025 6.500 % 150,000 144,665 — $ 487,500 $ 470,370 $ 95,624

Components of Other Comprehen_2

Components of Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income/(Loss)	The following table provides the changes in accumulated other comprehensive income (loss) by component, net of tax, for the three and nine months ended September 30, 2020 and 2019: (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of July 1, 2020 $ 118,327 $ 16,305 $ (269,430) $ (134,798) Net unrealized gains (losses) (6,121) (805) (141) (7,067) Amounts reclassified from AOCI 1,003 (2,128) 2,520 1,395 Other comprehensive income (loss) (5,118) (2,933) 2,379 (5,672) Balance as of September 30, 2020 $ 113,209 $ 13,372 $ (267,051) $ (140,470) Balance as of January 1, 2020 $ 31,079 $ 3,227 $ (273,914) $ (239,608) Net unrealized gains (losses) 81,127 13,998 (163) 94,962 Amounts reclassified from AOCI 1,003 (3,853) 7,026 4,176 Other comprehensive income (loss) 82,130 10,145 6,863 99,138 Balance as of September 30, 2020 $ 113,209 $ 13,372 $ (267,051) $ (140,470) (Dollars in thousands) Securities AFS Cash Flow Pension and Total Balance as of July 1, 2019 $ 21,071 $ 2,184 $ (285,744) $ (262,489) Net unrealized gains (losses) 16,889 1,855 — 18,744 Amounts reclassified from AOCI — 989 2,102 3,091 Other comprehensive income (loss) 16,889 2,844 2,102 21,835 Balance as of September 30, 2019 $ 37,960 $ 5,028 $ (283,642) $ (240,654) Balance as of January 1, 2019 $ (75,736) $ (12,112) $ (288,768) $ (376,616) Net unrealized gains (losses) 113,495 13,367 — 126,862 Amounts reclassified from AOCI 201 3,773 5,126 9,100 Other comprehensive income (loss) 113,696 17,140 5,126 135,962 Balance as of September 30, 2019 $ 37,960 $ 5,028 $ (283,642) $ (240,654)
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 Details about AOCI 2020 2019 2020 2019 Affected line item in the statement where net income is presented Securities AFS: Realized (gains) losses on securities AFS $ 1,323 $ — $ 1,323 $ 267 Securities gains (losses), net Tax expense (benefit) (320) — (320) (66) Provision (benefit) for income taxes 1,003 — 1,003 201 Cash flow hedges: Realized (gains) losses on cash flow hedges (2,807) 1,313 (5,084) 5,012 Interest and fees on loans and leases Tax expense (benefit) 679 (324) 1,231 (1,239) Provision (benefit) for income taxes (2,128) 989 (3,853) 3,773 Pension and Postretirement Plans: Amortization of prior service cost and net actuarial gain (loss) 3,325 2,792 9,270 6,809 All other expense Tax expense (benefit) (805) (690) (2,244) (1,683) Provision (benefit) for income taxes 2,520 2,102 7,026 5,126 Total reclassification from AOCI $ 1,395 $ 3,091 $ 4,176 $ 9,100

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
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) 2020 2019 2020 2019 Net income $ 539,038 $ 113,943 $ 612,175 $ 331,090 Net income attributable to noncontrolling interest 2,977 2,883 8,680 8,555 Net income attributable to controlling interest 536,061 111,060 603,495 322,535 Preferred stock dividends 12,722 1,550 15,822 4,650 Net income available to common shareholders $ 523,339 $ 109,510 $ 587,673 $ 317,885 Weighted average common shares outstanding—basic 549,690 311,888 391,699 314,442 Effect of dilutive securities 1,156 1,917 1,014 1,959 Weighted average common shares outstanding—diluted 550,846 313,805 392,713 316,401 Net income per share available to common shareholders $ 0.95 $ 0.35 $ 1.50 $ 1.01 Diluted income per share available to common shareholders $ 0.95 $ 0.35 $ 1.50 $ 1.00
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) 2020 2019 2020 2019 Stock options excluded from the calculation of diluted EPS 8,306 1,883 4,564 2,413 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 15.32 $ 21.21 $ 17.05 $ 21.36 Other equity awards excluded from the calculation of diluted EPS 6,824 2,094 4,826 1,815

Pension, Savings, And Other E_2

Pension, Savings, And Other Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2020
Retirement Benefits, Description [Abstract]
Schedule of Components of Net Periodic Benefit Cost	The components of net periodic benefit cost for the three months ended September 30 were as follows: Pension Benefits Other Benefits (Dollars in thousands) 2020 2019 2020 2019 Components of net periodic benefit cost Service cost $ 8 $ 7 $ 25 $ 23 Interest cost 5,844 7,505 304 358 Expected return on plan assets (7,000) (9,335) (325) (314) Amortization of unrecognized: Prior service cost (credit) — — 8 — Actuarial (gain) loss 3,381 2,546 (64) (112) Net periodic benefit cost (credit) $ 2,233 $ 723 $ (52) $ (45) The components of net periodic benefit cost for the nine months ended September 30 were as follows: Pension Benefits Other Benefits (Dollars in thousands) 2020 2019 2020 2019 Components of net periodic benefit cost Service cost $ 24 $ 23 $ 74 $ 71 Interest cost 17,663 22,655 915 1,060 Expected return on plan assets (19,337) (27,681) (947) (852) Amortization of unrecognized: Prior service cost (credit) — — 24 — Actuarial (gain) loss 9,829 7,416 (218) (346) Net periodic benefit cost (credit) $ 8,179 $ 2,413 $ (152) $ (67)

Business Segment Information (T

Business Segment Information (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting, Measurement Disclosures [Abstract]
Amounts Of Consolidated Revenue, Expense, Tax And Assets	The following table reflects the amounts of consolidated revenue, expense, tax, and average assets for each segment for the three and nine months ended September 30: Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Consolidated Net interest income $ 532,365 $ 300,676 $ 1,140,511 $ 898,794 Provision for credit losses (a) 227,000 14,366 502,388 36,273 Noninterest income 822,923 171,735 1,203,948 470,773 Noninterest expense 587,040 308,306 1,210,139 904,883 Income before income taxes 541,248 149,739 631,932 428,411 Provision for income taxes 2,210 35,796 19,757 97,321 Net income $ 539,038 $ 113,943 $ 612,175 $ 331,090 Average assets $ 81,683,111 $ 41,940,901 $ 57,810,478 $ 41,359,574 (a) Increase in provision expense for the three and nine months ended September 30, 2020 is primarily due to provision related to non-PCD loans acquired in the IBKC merger and Truist branch acquisition and the economic forecast attributable to the COVID-19 pandemic. Three Months Ended Nine Months Ended (Dollars in thousands) 2020 2019 2020 2019 Regional Banking Net interest income $ 583,907 $ 302,467 $ 1,233,654 $ 885,932 Provision for credit losses 227,326 19,839 501,453 50,967 Noninterest income 172,457 85,930 333,669 240,555 Noninterest expense 373,680 193,956 768,870 586,697 Income before income taxes 155,358 174,602 297,000 488,823 Provision for income taxes 34,744 41,795 65,497 115,266 Net income $ 120,614 $ 132,807 $ 231,503 $ 373,557 Average assets $ 64,371,210 $ 31,632,768 $ 44,170,906 $ 30,231,372 Fixed Income Net interest income $ 11,632 $ 5,309 $ 36,088 $ 18,809 Noninterest income 110,783 77,808 319,741 197,238 Noninterest expense 67,395 67,582 231,488 173,656 Income before income taxes 55,020 15,535 124,341 42,391 Provision for income taxes 13,456 3,707 30,236 10,001 Net income $ 41,564 $ 11,828 $ 94,105 $ 32,390 Average assets $ 3,002,282 $ 2,882,478 $ 3,341,255 $ 2,952,925 Corporate Net interest income (expense) $ (69,187) $ (13,252) $ (145,847) $ (28,136) Noninterest income 539,668 7,359 548,891 30,112 Noninterest expense 142,894 42,297 199,461 139,052 Income (loss) before income taxes 327,587 (48,190) 203,583 (137,076) Provision (benefit) for income taxes (46,785) (11,632) (77,690) (36,416) Net income (loss) $ 374,372 $ (36,558) $ 281,273 $ (100,660) Average assets $ 13,595,544 $ 6,434,633 $ 9,527,471 $ 7,098,500 Non-Strategic Net interest income $ 6,013 $ 6,152 $ 16,616 $ 22,189 Provision/(provision credit) for loan losses (326) (5,473) 935 (14,694) Noninterest income 15 638 1,647 2,868 Noninterest expense 3,071 4,471 10,320 5,478 Income before income taxes 3,283 7,792 7,008 34,273 Provision for income taxes 795 1,926 1,714 8,470 Net income $ 2,488 $ 5,866 $ 5,294 $ 25,803 Average assets $ 714,075 $ 991,022 $ 770,846 $ 1,076,777 Certain previously reported amounts have been reclassified to agree with current presentation. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the three months ended September 30, 2020 and 2019: Three months ended September 30, 2020 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Fixed income (a) 380 110,563 — — 110,943 Mortgage banking and title income 65,569 — 23 (89) 65,503 Deposit transactions and cash management 40,500 — 1,528 28 42,056 Brokerage, management fees and commissions 19,595 — (1,704) — 17,891 Trust services and investment management 14,599 — (2,858) — 11,741 Bankcard income 10,150 — 277 30 10,457 Securities gains (losses), net (b) — — (1,170) — (1,170) Purchase accounting gain — — 532,150 — 532,150 Other income (c) 21,664 220 11,422 46 33,352 Total noninterest income $ 172,457 $ 110,783 $ 539,668 $ 15 $ 822,923 (a) Includes $9.9 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606. Three months ended September 30, 2019 (Dollars in thousands) Regional Banking Fixed Income Corporate Non- Strategic Consolidated Fixed income (a) 57 77,588 — — 77,645 Mortgage banking and title income 1,643 — — 376 2,019 Deposit transactions and cash management 32,624 — 1,721 34 34,379 Brokerage, management fees and commissions 14,157 — — — 14,157 Trust services and investment management 7,190 — (27) — 7,163 Bankcard income 7,030 11 63 (87) 7,017 Securities gains (losses), net (b) — — 97 — 97 Other income (c) 23,229 209 5,505 315 29,258 Total noninterest income $ 85,930 $ 77,808 $ 7,359 $ 638 $ 171,735 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Includes $9.2 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the nine months ended September 30, 2020 and 2019: Nine Months Ended September 30, 2020 (Dollars in thousands) Regional Banking Fixed Income Corporate Non-Strategic Consolidated Fixed income (a) 582 318,417 — — 318,999 Deposit transactions and cash management 98,906 — 4,131 96 103,133 Mortgage banking and title income 71,168 — 23 881 72,072 Brokerage, management fees and commissions 48,799 — (1,703) — 47,096 Trust services and investment management 29,562 — (2,893) — 26,669 Bankcard income 23,853 — 421 88 24,362 Securities gains (losses), net (b) — — (2,638) — (2,638) Purchase accounting gain — — 532,150 — 532,150 Other income (c)(d) 60,799 1,324 19,400 582 82,105 Total noninterest income $ 333,669 $ 319,741 $ 548,891 $ 1,647 $ 1,203,948 (a) Includes $28.6 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606. (d) Corporate balance includes negative deferred compensation income driven by equity market valuations. Nine Months Ended September 30, 2019 (Dollars in thousands) Regional Banking Fixed Income Corporate Non- Strategic Consolidated Fixed income (a) 120 196,582 — 1,106 197,808 Mortgage banking and title income 5,119 — — 1,358 6,477 Deposit transactions and cash management 93,316 4 4,956 98 98,374 Brokerage, management fees and commissions 40,910 — — — 40,910 Trust services and investment management 22,148 — (71) — 22,077 Bankcard income 20,670 11 185 (542) 20,324 Securities gains (losses), net (b) — — 177 — 177 Purchase accounting gain — — — — — Other income (c)(d) 58,272 641 24,865 848 84,626 Total noninterest income $ 240,555 $ 197,238 $ 30,112 $ 2,868 $ 470,773 Certain previously reported amounts have been reclassified to agree with current presentation. (a) Includes $23.6 million of underwriting, portfolio advisory, and other noninterest income in scope of Accounting Standards Codification ("ASC") 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes other service charges, ATM and interchange fees, electronic banking fees, and insurance commissions in scope of ASC 606.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2020
Variable Interest Entities [Abstract]
Summary Of VIEs Consolidated By FHN	The following table summarizes the carrying value of assets and liabilities associated with rabbi trusts used for deferred compensation plans which are consolidated by FHN as of September 30, 2020 and December 31, 2019: ( Dollars in thousands ) September 30, 2020 December 31, 2019 Assets: Other assets $ 154,783 $ 91,873 Total assets $ 154,783 $ 91,873 Liabilities: Other liabilities $ 131,782 $ 70,830 Total liabilities $ 131,782 $ 70,830
Summary of the Impact of Qualifying LIHTC Investments	The following table summarizes the impact to the Provision (benefit) for income taxes on the Consolidated Statements of Income for the three and nine months ended September 30, 2020, and 2019 for LIHTC investments accounted for under the proportional amortization method. Three Months Ended Nine Months Ended ( Dollars in thousands ) 2020 2019 2020 2019 Provision (benefit) for income taxes: Amortization of qualifying LIHTC investments $ 8,273 $ 4,436 $ 19,586 $ 12,721 Low income housing tax credits (6,738) (3,607) (16,094) (10,758) Other tax benefits related to qualifying LIHTC investments (3,034) (1,751) (8,172) (4,970)
Summary Of VIEs Not Consolidated By FHN	The following table summarizes FHN’s nonconsolidated VIEs as of September 30, 2020: (Dollars in thousands) Maximum Liability Classification Type Low income housing partnerships $ 338,558 $ 166,931 (a) Other tax credit investments (b) 66,172 34,993 Other assets Small issuer trust preferred holdings (c) 209,442 — Loans and leases On-balance sheet trust preferred securitization 32,031 82,143 (d) Proprietary residential mortgage securitizations 471 — Trading securities Holdings of agency mortgage-backed securities (c) 7,386,169 — (e) Commercial loan troubled debt restructurings (f) 177,949 — Loans and leases Sale-leaseback transaction 17,993 — (g) Proprietary trust preferred issuances (h) — 287,124 Term borrowings (a) Maximum loss exposure represents $171.7 million of current investments and $166.9 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 2024. (b) Maximum loss exposure represents the value of current investments. (c) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (d) Includes $112.5 million classified as Loans and leases, and $1.7 million classified as Trading securities which are offset by $82.1 million classified as Term borrowings. (e) Includes $0.9 billion classified as Trading securities and $6.5 billion classified as Securities available for sale. (f) Maximum loss exposure represents $172.8 million of current receivables and contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring were $5.1 million. (g) Maximum loss exposure represents the current loan balance plus additional funding commitments. (h) No exposure to loss due to nature of FHN's involvement. The following table summarizes FHN’s nonconsolidated VIEs as of December 31, 2019: (Dollars in thousands) Maximum Liability Classification Type Low income housing partnerships $ 237,668 $ 136,404 (a) Other tax credit investments (b) (c) 6,282 — Other assets Small issuer trust preferred holdings (d) 238,397 — Loans and leases On-balance sheet trust preferred securitization 33,265 80,908 (e) Proprietary residential mortgage securitizations 941 — Trading securities Holdings of agency mortgage-backed securities (d) 4,537,685 — (f) Commercial loan troubled debt restructurings (g) 45,169 — Loans and leases Sale-leaseback transaction 18,111 — (h) Proprietary trust preferred issuances (i) — 167,014 Term borrowings (a) Maximum loss exposure represents $101.3 million of current investments and $136.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2023. (b) A liability is not recognized as investments are written down over the life of the related tax credit. (c) Maximum loss exposure represents current investment balance. As of December 31, 2019, there were no investments funded through loans from community development enterprises. (d) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (e) Includes $112.5 million classified as Loans and leases, and $1.7 million classified as Trading securities which are offset by $80.9 million classified as Term borrowings. (f) Includes $0.5 billion classified as Trading securities and $4.0 billion classified as securities available for sale. (g) Maximum loss exposure represents $43.4 million of current receivables and $1.8 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (h) Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 3,847,085 $ 240,218 $ 2,444 Offsetting upstream interest rate contracts 3,847,085 2,317 16,828 Forwards and futures purchased 15,069,709 41,553 3,456 Forwards and futures sold 15,596,324 5,788 39,018 December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer interest rate contracts $ 2,697,522 $ 65,768 $ 6,858 Offsetting upstream interest rate contracts 2,697,522 2,583 3,994 Option contracts purchased 40,000 131 — Forwards and futures purchased 9,217,350 17,029 3,187 Forwards and futures sold 9,403,112 3,611 16,620
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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 6,667,600 $ 487,005 $ 303 Offsetting upstream interest rate contracts 6,667,600 303 25,997 Debt Hedging Hedging Instruments: Interest rate swaps $ 500,000 $ 13 N/A Hedged Items: Term borrowings: Par N/A N/A $ 500,000 Cumulative fair value hedging adjustments N/A N/A 729 Unamortized premium (discount) and issuance costs N/A N/A (74) Total carrying value N/A N/A $ 500,655 December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 3,044,067 $ 90,394 $ 3,515 Offsetting upstream interest rate contracts 3,044,067 3,537 9,735 Debt Hedging Hedging Instruments: Interest rate swaps $ 500,000 N/A $ 69 Hedged Items: Term borrowings: Par N/A N/A $ 500,000 Cumulative fair value hedging adjustments N/A N/A (1,604) Unamortized premium (discount) and issuance costs N/A N/A (740) Total carrying value N/A N/A $ 497,656
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, 2020 and 2019: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (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) $ (14,050) $ 44,375 $ 197,346 $ 124,193 Offsetting upstream interest rate contracts (a) 14,050 (44,375) (197,346) (124,193) Debt Hedging Hedging Instruments: Interest rate swaps (b) $ (1,421) $ 1,994 $ 2,776 $ 12,969 Hedged Items: Term borrowings (a) (c) 1,412 (2,004) (2,333) (12,876) (a) Gains (losses) included in Other expense within the Consolidated Statements of Income. (b) Gains (losses) included in Interest expense. (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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 1,500,000 $ 35,606 N/A Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 1,500,000 N/A December 31, 2019 (Dollars in thousands) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 900,000 N/A $ 241 Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 900,000 N/A
Gains/(Losses) on Derivatives Associated with Cash Flow Hedges	The following table summarizes gains (losses) on FHN’s derivatives associated with cash flow hedges for the three and nine months ended September 30, 2020 and 2019: Three Months Ended Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Cash Flow Hedges Hedging Instruments: Interest rate contracts (a) $ (7,799) $ 3,840 $ 9,644 $ 22,954 Gain (loss) recognized in Other comprehensive income (loss) (805) 1,855 13,998 13,367 Gain (loss) reclassified from AOCI into Interest income (2,128) 989 (3,853) 3,773 (a) Approximately $26.5 million of pre-tax gains are expected to be reclassified into earnings in the next twelve months.
Derivative Assets And Collateral Received	The following table provides details of derivative assets and collateral received as presented on the Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019: Gross amounts not offset in (Dollars in thousands) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative assets: September 30, 2020 Interest rate derivative contracts $ 787,139 $ — $ 787,139 $ (11,401) $ (369,510) $ 406,228 Forward contracts 47,341 — 47,341 (16,105) (16,213) 15,023 $ 834,480 $ — $ 834,480 $ (27,506) $ (385,723) $ 421,251 December 31, 2019 Interest rate derivative contracts $ 162,344 $ — $ 162,344 $ (5,604) $ (143,334) $ 13,406 Forward contracts 20,640 — 20,640 (13,292) (2,000) 5,348 $ 182,984 $ — $ 182,984 $ (18,896) $ (145,334) $ 18,754 (a) Included in Other assets on the Consolidated Balance Sheets. As of September 30, 2020 and December 31, 2019, $2.6 million and $0.1 million of derivative assets have been excluded from these tables because they are generally not subject to master netting or similar agreements.
Derivative Liabilities and Collateral Pledged	The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019: Gross amounts not offset in the (Dollars in thousands) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative liabilities: September 30, 2020 Interest rate derivative contracts $ 47,047 $ — $ 47,047 $ (11,401) $ (30,829) $ 4,817 Forward contracts 42,474 — 42,474 (16,105) (26,369) — $ 89,521 $ — $ 89,521 $ (27,506) $ (57,198) $ 4,817 December 31, 2019 Interest rate derivative contracts $ 24,431 $ — $ 24,431 $ (5,604) $ (18,689) $ 138 Forward contracts 19,807 — 19,807 (13,292) (6,515) — $ 44,238 $ — $ 44,238 $ (18,896) $ (25,204) $ 138 (a) Included in Other liabilities on the Consolidated Balance Sheets. As of September 30, 2020 and December 31, 2019, $19.9 million and $23.2 million, respectively, of derivative liabilities (primarily Visa-related derivatives) have been excluded from these tables because they are generally not subject to master netting or similar agreements.
Schedule of Fair Value Derivative Instruments, Statements of Financial Performance and Financial Position, Location	The notional and fair values of these contracts are presented in the table below. Balances and activity for periods prior to the IBKC merger were not significant. September 30, 2020 (Dollars in thousands) Notional Assets Liabilities Mortgage Banking Hedges Option contracts written $ 698,744 $ 21,677 $ 223 Forward contracts purchased 753,660 859 2,577 The following table summarizes gains (losses) on FHN's derivatives associated with mortgage banking activities for the three and nine month periods ended September 30, 2020. Three Months Ended Nine Months Ended 2020 2020 (Dollars in thousands) Gains (Losses) Gains (Losses) Mortgage Banking Hedges Option contracts written $ 7,434 $ 7,434 Forward contracts purchased (9,633) (9,633)

Master Netting and Similar Ag_2

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions (Tables)	9 Months Ended
	Sep. 30, 2020
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 and collateral pledged by counterparties as of September 30, 2020 and December 31, 2019: Gross amounts not offset in the (Dollars in thousands) Gross amounts Gross amounts Net amounts of Offsetting Securities collateral Net amount Securities purchased under agreements to resell: September 30, 2020 $ 591,987 $ — $ 591,987 $ (70) $ (590,123) $ 1,794 December 31, 2019 586,629 — 586,629 (21,004) (562,702) 2,923
Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company	The following table provides details of securities sold under agreements to repurchase and collateral pledged by FHN as of September 30, 2020 and December 31, 2019: Gross amounts not offset in the (Dollars in thousands) Gross amounts Gross amounts Net amounts of Offsetting Securities/ Net amount Securities sold under agreements to repurchase: September 30, 2020 $ 1,158,994 $ — $ 1,158,994 $ (70) $ (1,158,791) $ 133 December 31, 2019 716,925 — 716,925 (21,004) (695,879) 42
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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 363,674 $ — $ 363,674 Government agency issued MBS 578,284 6,882 585,166 Government agency issued CMO 4,529 2,412 6,941 Other U.S. government agencies 82,576 — 82,576 Government guaranteed loans (SBA and USDA) 120,637 — 120,637 Total securities sold under agreements to repurchase $ 1,149,700 $ 9,294 $ 1,158,994 December 31, 2019 (Dollars in thousands) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 41,364 $ — $ 41,364 Government agency issued MBS 341,173 4,545 345,718 Other U.S. government agencies 54,924 — 54,924 Government guaranteed loans (SBA and USDA) 274,919 — 274,919 Total securities sold under agreements to repurchase $ 712,380 $ 4,545 $ 716,925

Fair Value of Assets & Liabil_2

Fair Value of Assets & Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020: September 30, 2020 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 98,743 $ — $ 98,743 Government agency issued MBS — 352,564 — 352,564 Government agency issued CMO — 501,091 — 501,091 Other U.S. government agencies — 261,569 — 261,569 States and municipalities — 13,087 — 13,087 Corporate and other debt — 158,544 — 158,544 Total trading securities—fixed income — 1,385,598 — 1,385,598 Trading securities—mortgage banking — — 471 471 Loans held for sale (elected fair value) — 359,396 12,435 371,831 Loans held for investment (elected fair value) — — 12,372 12,372 Securities available for sale: U.S. treasuries — 300,034 — 300,034 Government agency issued MBS — 3,827,066 — 3,827,066 Government agency issued CMO — 2,705,447 — 2,705,447 Other U.S. government agencies — 658,266 — 658,266 States and municipalities — 432,090 — 432,090 Corporate and other debt — 40,010 — 40,010 Interest-Only Strip (elected fair value) — — 32,959 32,959 Total securities available for sale — 7,962,913 32,959 7,995,872 Other assets: Deferred compensation mutual funds 109,907 — — 109,907 Equity, mutual funds, and other 24,712 — — 24,712 Derivatives, forwards and futures 48,200 — — 48,200 Derivatives, interest rate contracts — 787,139 — 787,139 Derivatives, other — 1,436 342 1,778 Total other assets 182,819 788,575 342 971,736 Total assets $ 182,819 $ 10,496,482 $ 58,579 $ 10,737,880 Trading liabilities—fixed income: U.S. treasuries $ — $ 431,565 $ — $ 431,565 States and municipalities — 203 — 203 Corporate and other debt — 45,298 — 45,298 Equity, mutual funds, and other — 7 — 7 Total trading liabilities—fixed income — 477,073 — 477,073 Other liabilities: Derivatives, forwards and futures 45,051 — — 45,051 Derivatives, interest rate contracts — 45,795 — 45,795 Derivatives, other — 1,462 17,140 18,602 Total other liabilities 45,051 47,257 17,140 109,448 Total liabilities $ 45,051 $ 524,330 $ 17,140 $ 586,521 The following table presents the balance of assets and liabilities measured at fair value on a recurring basis as of December 31, 2019: December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Trading securities—fixed income: U.S. treasuries $ — $ 134,844 $ — $ 134,844 Government agency issued MBS — 268,024 — 268,024 Government agency issued CMO — 250,652 — 250,652 Other U.S. government agencies — 124,972 — 124,972 States and municipalities — 120,744 — 120,744 Corporate and other debt — 445,253 — 445,253 Equity, mutual funds, and other — 777 — 777 Total trading securities—fixed income — 1,345,266 — 1,345,266 Trading securities—mortgage banking — — 941 941 Loans held for sale (elected fair value) — — 14,033 14,033 Securities available for sale: U.S. treasuries — 100 — 100 Government agency issued MBS — 2,348,517 — 2,348,517 Government agency issued CMO — 1,670,492 — 1,670,492 Other U.S. government agencies — 306,092 — 306,092 States and municipalities — 60,526 — 60,526 Corporate and other debt — 40,540 — 40,540 Interest-Only Strip (elected fair value) — — 19,136 19,136 Total securities available for sale — 4,426,267 19,136 4,445,403 Other assets: Deferred compensation mutual funds 46,815 — — 46,815 Equity, mutual funds, and other 22,643 — — 22,643 Derivatives, forwards and futures 20,640 — — 20,640 Derivatives, interest rate contracts — 162,413 — 162,413 Derivatives, other — 62 — 62 Total other assets 90,098 162,475 — 252,573 Total assets $ 90,098 $ 5,934,008 $ 34,110 $ 6,058,216 Trading liabilities—fixed income: U.S. treasuries $ — $ 406,380 $ — $ 406,380 Other U.S. government agencies — 88 — 88 Government agency issued MBS — 33 — 33 Corporate and other debt — 99,080 — 99,080 Total trading liabilities—fixed income — 505,581 — 505,581 Other liabilities: Derivatives, forwards and futures 19,807 — — 19,807 Derivatives, interest rate contracts — 24,412 — 24,412 Derivatives, other — 466 22,795 23,261 Total other liabilities 19,807 24,878 22,795 67,480 Total liabilities $ 19,807 $ 530,459 $ 22,795 $ 573,061
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, 2020 and 2019, on a recurring basis are summarized as follows: Three Months Ended September 30, 2020 (Dollars in thousands) Trading Interest- only strips- AFS Loans held Loans held for investment Net derivative Balance on July 1, 2020 $ 628 $ 25,446 $ 13,263 $ — $ (18,645) Acquired — — — 13,746 — Total net gains (losses) included in: Net income (157) (1,282) (80) (418) (599) Purchases — — — — — Sales — (56) — (2,927) — Settlements — — (748) (2,312) 2,446 Net transfers into (out of) Level 3 — 8,851 (b) — 4,283 — Balance on September 30, 2020 $ 471 $ 32,959 $ 12,435 $ 12,372 $ (16,798) Net unrealized gains (losses) included in net income $ — (a) $ 1,192 (c) $ (80) (a) $ 367 $ (76) (d) Three Months Ended September 30, 2019 (Dollars in thousands) Trading Interest-only-strips-AFS Loans held for sale Net derivative Balance on July 1, 2019 $ 1,255 $ 17,792 $ 15,092 $ (26,545) Total net gains (losses) included in: Net income (157) (1,421) 443 (4,008) Purchases — — — — Sales — (11,401) — — Settlements — — (1,126) 2,468 Net transfers into (out of) Level 3 — 10,279 (b) — — Balance on September 30, 2019 $ 1,098 $ 15,249 $ 14,409 $ (28,085) Net unrealized gains (losses) included in net income $ — (a) $ (1,977) (c) $ 443 (a) $ (4,008) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in Other expense. The changes in Level 3 assets and liabilities measured at fair value for the nine months ended September 30, 2020 and 2019, on a recurring basis are summarized as follows: Nine Months Ended September 30, 2020 (Dollars in thousands) Trading Interest- only strips- AFS Loans held Loans held for investment Net derivative Balance on January 1, 2020 $ 941 $ 19,136 $ 14,033 $ — $ (22,795) Acquired — — — 13,746 — Total net gains (losses) included in: Net income (470) (3,810) 671 (418) (1,311) Purchases — 5,481 — — — Sales — (8,759) — (2,927) — Settlements — — (2,269) (2,312) 7,308 Net transfers into (out of) Level 3 — 20,911 (b) — 4,283 — Balance on September 30, 2020 $ 471 $ 32,959 $ 12,435 $ 12,372 $ (16,798) Net unrealized gains (losses) included in net income $ — (a) $ 2,994 (c) $ 671 (a) $ 367 $ (788) (d) Nine Months Ended September 30, 2019 (Dollars in thousands) Trading Interest-only-strips-AFS Loans held for sale Net derivative Balance on January 1, 2019 $ 1,524 $ 9,902 $ 16,273 $ (31,540) Total net gains (losses) included in: Net income (128) (2,820) 1,259 (3,892) Purchases — 86 10 — Sales — (38,612) — — Settlements (298) — (3,133) 7,347 Net transfers into (out of) Level 3 — 46,693 (b) — — Balance on September 30, 2019 $ 1,098 $ 15,249 $ 14,409 $ (28,085) Net unrealized gains (losses) included in net income $ (66) (a) $ (1,250) (c) $ 1,259 (a) $ (3,892) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips - AFS level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income.
Nonrecurring Fair Value Measurements	For assets measured at fair value on a nonrecurring basis which were still held on the Consolidated Balance Sheets at September 30, 2020, and December 31, 2019, 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, 2020 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 594,485 $ 743 $ 595,228 Loans held for sale—first mortgages — — 529 529 Loans and leases (a) — — 114,583 114,583 OREO (b) — — 17,767 17,767 Other assets (c) — — 9,490 9,490 Carrying value at December 31, 2019 (Dollars in thousands) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 492,595 $ 929 $ 493,524 Loans held for sale—first mortgages — — 516 516 Loans and leases (a) — — 42,208 42,208 OREO (b) — — 15,660 15,660 Other assets (c) — — 10,608 10,608 (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 credit losses. (b) Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method.
Gains/(losses) on Nonrecurring Fair Value Measurements	For assets measured on a nonrecurring basis which were still held on the Consolidated Balance Sheets at period end, the following table provides information about the fair value adjustments recorded during the three and nine months ended September 30, 2020 and 2019: Net gains (losses) Three Months Ended September 30, Net gains (losses) Nine months ended September 30, (Dollars in thousands) 2020 2019 2020 2019 Loans held for sale—SBAs and USDA $ (1,560) $ (977) $ (2,304) $ (1,208) Loans held for sale—first mortgages 31 2 32 27 Loans and leases (a) (17,444) (15,559) (31,040) (16,036) OREO (b) (34) (282) (203) (256) Other assets (c) (346) (407) (1,118) (1,349) $ (19,353) $ (17,223) $ (34,633) $ (18,822) (a) Write-downs on these loans are recognized as part of provision for credit 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, 2020 and December 31, 2019: (Dollars in thousands) Values Utilized Level 3 Class Fair Value at September 30, 2020 Valuation Techniques Unobservable Input Range Weighted Average (d) Available for sale securities SBA-interest only strips $ 32,959 Discounted cash flow Constant prepayment rate 12% 12% Bond equivalent yield 14% - 16% 15% Loans held for sale - residential real estate 12,964 Discounted cash flow Prepayment speeds - First mortgage 5% - 15% 5.4% Foreclosure losses 50% - 65% 63% Loss severity trends - First mortgage 3% - 19% of UPB 13.3% Loans held for sale - unguaranteed interest in SBA loans 743 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 7% 7% Loans held for investment 12,372 Discounted cash flow Constant prepayment rate 0% - 24% 11% Constant default rate 0% - 15% 1% Loss severity trends 0% - 100% 1% Derivative liabilities, other 16,798 Discounted cash flow Visa covered litigation resolution amount $5.4 billion - $6.0 billion $5.8 billion Probability of resolution scenarios 10% - 50% 16% Time until resolution 6 - 30 21 months Loans and leases (a) 114,583 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 17,767 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 9,490 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value. (Dollars in thousands) Values Utilized Level 3 Class Fair Value at December 31, 2019 Valuation Techniques Unobservable Input Range Weighted Average (d) Available for sale securities SBA-interest only strips $ 19,136 Discounted cash flow Constant prepayment rate 12% 12% Bond equivalent yield 16% - 17% 16% Loans held for sale - residential real estate 14,549 Discounted cash flow Prepayment speeds - First mortgage 3% - 14% 4.1% Prepayment speeds - HELOC 0% - 12% 7.6% Foreclosure losses 50% - 66% 64% Loss severity trends - First mortgage 3% - 24% of UPB 14.3% Loss severity trends - HELOC 0% - 72% of UPB 50% Loans held for sale - unguaranteed interest in SBA loans 929 Discounted cash flow Constant prepayment rate 8% - 12% 10% Bond equivalent yield 9% 9% Derivative liabilities, other 22,795 Discounted cash flow Visa covered litigation resolution amount $5.4 billion - $6.0 billion $5.8 billion Probability of resolution scenarios 10% - 50% 16% Time until resolution 15 - 39 months 29 months Loans and leases (a) 42,208 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) 15,660 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) 10,608 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful. (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value.
Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount	The following tables reflect the differences between the fair value carrying amount of residential real estate loans held for sale and held for investment 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, 2020 (Dollars in thousands) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 371,831 $ 361,865 $ 9,966 Nonaccrual loans 2,972 6,073 (3,101) Loans 90 days or more past due and still accruing 287 419 (132) Loans held for investment reported at fair value: Total loans $ 12,372 $ 13,062 $ (690) Nonaccrual loans 643 890 (247) December 31, 2019 (Dollars in thousands) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 14,033 $ 19,278 $ (5,245) Nonaccrual loans 3,532 6,646 (3,114) Loans 90 days or more past due and still accruing 163 268 (105)
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) 2020 2019 2020 2019 Changes in fair value included in net income: Mortgage banking noninterest income Loans held for sale $ 1,867 $ 443 $ 2,618 $ 1,259 Loans held for investment (418) — (418) —
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 Balance Sheets as of September 30, 2020: September 30, 2020 Book Fair Value (Dollars in thousands) Level 1 Level 2 Level 3 Total Assets: Loans and leases, net of allowance for loan and lease losses Commercial: Commercial, financial and industrial $ 33,166,623 $ — $ — $ 33,295,053 $ 33,295,053 Commercial real estate 12,302,929 — — 12,304,261 12,304,261 Consumer: Consumer real estate (a) 12,062,439 — — 12,327,350 12,327,350 Credit card & other 1,186,438 — — 1,210,286 1,210,286 Total loans and leases, net of allowance for loan and lease losses 58,718,429 — — 59,136,950 59,136,950 Short-term financial assets: Interest-bearing cash 5,443,292 5,443,292 — — 5,443,292 Federal funds sold 1,480 — 1,480 — 1,480 Securities purchased under agreements to resell 591,987 — 591,987 — 591,987 Total short-term financial assets 6,036,759 5,443,292 593,467 — 6,036,759 Trading securities (b) 1,386,069 — 1,385,598 471 1,386,069 Loans held for sale Mortgage loans (elected fair value) (b) 371,831 — 359,396 12,435 371,831 USDA & SBA loans- LOCOM 595,228 — 599,501 776 600,277 Other consumer loans- LOCOM 4,569 — 4,569 — 4,569 Mortgage loans- LOCOM 78,876 — — 78,876 78,876 Total loans held for sale 1,050,504 — 963,466 92,087 1,055,553 Securities available for sale (b) 7,995,872 — 7,962,913 32,959 7,995,872 Derivative assets (b) 837,117 48,200 788,575 342 837,117 Other assets: Tax credit investments 407,480 — — 386,901 386,901 Deferred compensation mutual funds 109,907 109,907 — — 109,907 Equity, mutual funds, and other (c) 315,828 24,712 — 291,116 315,828 Total other assets 833,215 134,619 — 678,017 812,636 Total assets $ 76,867,965 $ 5,626,111 $ 11,694,019 $ 59,950,803 $ 77,270,933 Liabilities: Defined maturity deposits $ 5,525,913 $ — $ 5,602,997 $ — $ 5,602,997 Trading liabilities (b) 477,073 — 477,073 — 477,073 Short-term financial liabilities: Federal funds purchased 840,847 — 840,847 — 840,847 Securities sold under agreements to repurchase 1,158,994 — 1,158,994 — 1,158,994 Other short-term borrowings 141,878 — 141,878 — 141,878 Total short-term financial liabilities 2,141,719 — 2,141,719 — 2,141,719 Term borrowings: Real estate investment trust-preferred 46,287 — — 47,000 47,000 Term borrowings—new market tax credit investment 37,881 — — 37,993 37,993 Secured borrowings 15,314 — — 15,314 15,314 Junior subordinated debentures 237,475 — — 229,699 229,699 Other long term borrowings 1,824,913 — 1,929,827 — 1,929,827 Total term borrowings 2,161,870 — 1,929,827 330,006 2,259,833 Derivative liabilities (b) 109,448 45,051 47,257 17,140 109,448 Total liabilities $ 10,416,023 $ 45,051 $ 10,198,873 $ 347,146 $ 10,591,070 (a) In first quarter 2020, the Permanent Mortgage portfolio was combined into Consumer Real Estate portfolio, all prior periods were revised for comparability. (b) Classes are detailed in the recurring and nonrecurring measurement tables. (c) Level 1 primarily consists of mutual funds with readily determinable fair values. Level 3 includes restricted investments in FHLB-Cincinnati stock of $85.6 million and FRB stock of $205.6 million. The following table summarizes the book value and estimated fair value of financial instruments recorded in the Consolidated Balance Sheets as of December 31, 2019: December 31, 2019 Book Fair Value (Dollars in thousands) Level 1 Level 2 Level 3 Total Assets: Loans and leases and allowance for loan and lease losses Commercial: Commercial, financial and industrial $ 19,928,605 $ — $ — $ 20,096,397 $ 20,096,397 Commercial real estate 4,300,905 — — 4,300,489 4,300,489 Consumer: Consumer real estate 6,148,696 — — 6,334,187 6,334,187 Credit card & other 482,598 — — 487,079 487,079 Total loans and leases and allowance for loan and lease losses 30,860,804 — — 31,218,152 31,218,152 Short-term financial assets: Interest-bearing cash 482,405 482,405 — — 482,405 Federal funds sold 46,536 — 46,536 — 46,536 Securities purchased under agreements to resell 586,629 — 586,629 — 586,629 Total short-term financial assets 1,115,570 482,405 633,165 — 1,115,570 Trading securities (a) 1,346,207 — 1,345,266 941 1,346,207 Loans held for sale Mortgage loans (elected fair value) (a) 14,033 — — 14,033 14,033 USDA & SBA loans- LOCOM 493,525 — 495,323 947 496,270 Other consumer loans- LOCOM 5,197 — 5,197 — 5,197 Mortgage loans- LOCOM 81,035 — — 81,035 81,035 Total loans held for sale 593,790 — 500,520 96,015 596,535 Securities available for sale (a) 4,445,403 — 4,426,267 19,136 4,445,403 Securities held-to-maturity 10,000 — — 10,001 10,001 Derivative assets (a) 183,115 20,640 162,475 — 183,115 Other assets: Tax credit investments 247,075 — — 244,755 244,755 Deferred compensation assets 46,815 46,815 — — 46,815 Equity, mutual funds, and other (b) 229,352 22,643 — 206,709 229,352 Total other assets 523,242 69,458 — 451,464 520,922 Total assets $ 39,078,131 $ 572,503 $ 7,067,693 $ 31,795,709 $ 39,435,905 Liabilities: Deposits: Defined maturity $ 3,618,337 $ — $ 3,631,090 $ — $ 3,631,090 Trading liabilities (a) 505,581 — 505,581 — 505,581 Short-term financial liabilities: Federal funds purchased 548,344 — 548,344 — 548,344 Securities sold under agreements to repurchase 716,925 — 716,925 — 716,925 Other short-term borrowings 2,253,045 — 2,253,045 — 2,253,045 Total short-term financial liabilities 3,518,314 — 3,518,314 — 3,518,314 Term borrowings: Real estate investment trust-preferred 46,236 — — 47,000 47,000 Secured Borrowings 21,975 — — 21,975 21,975 Junior subordinated debentures 144,593 — — 142,375 142,375 Other long term borrowings 578,564 — 574,287 — 574,287 Total term borrowings 791,368 — 574,287 211,350 785,637 Derivative liabilities (a) 67,480 19,807 24,878 22,795 67,480 Total liabilities $ 8,501,080 $ 19,807 $ 8,254,150 $ 234,145 $ 8,508,102 Certain previously reported amounts have been reclassified to agree with current presentation. (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 $76.0 million and FRB stock of $130.7 million. The following table presents the contractual amount and fair value of unfunded loan commitments and standby and other commitments as of September 30, 2020 and December 31, 2019: Contractual Amount Fair Value (Dollars in thousands) September 30, 2020 December 31, 2019 September 30, 2020 December 31, 2019 Unfunded Commitments: Loan commitments $ 20,627,190 $ 12,355,220 $ 1,823 $ 3,656 Standby and other commitments 742,278 459,268 6,119 5,513

Restructuring, Repositioning,_2

Restructuring, Repositioning, and Efficiency (Tables)	9 Months Ended
	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Restructuring Expense Recognized	Total expense recognized for the three and nine months ended September 30, 2020 and 2019 is presented in the table below: Three Months Ended Nine Months Ended Dollars in thousands 2020 2019 2020 2019 Personnel expense $ — $ 1,182 $ 89 $ 10,244 Legal and professional fees 2 6,488 16 15,025 Net occupancy expense — (128) 2 761 Other (83) 300 (185) 12,632 Total restructuring, repositioning, and efficiency charges $ (81) $ 7,842 $ (78) $ 38,662

Financial Information - Narrati

Financial Information - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Product Information [Line Items]
Performance obligation, description of timing	one year or less
Non-Interest income
Product Information [Line Items]
Accounts receivable	$ 8.8

Financial Information - ASU 201

Financial Information - ASU 2016-13 (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans, net of unearned income	$ 59,706,531			$ 31,061,111
Allowance for loan and lease losses	988,102	$ 537,881		200,307	$ 193,149	$ 192,749	$ 180,424
Other assets	4,135,056			2,297,405
Other liabilities	1,695,868			990,094
Retained earnings	2,110,990			1,798,442
Total liabilities and equity	$ 83,029,579			$ 43,310,900
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans, net of unearned income			$ 2,980
Allowance for loan and lease losses			(106,394)
Other assets (deferred taxes)			31,330
Other assets			(72,084)
Other liabilities			23,973
Retained earnings			(96,057)
Total liabilities and equity			$ (72,084)

Acquisitions and Divestitures -

Acquisitions and Divestitures - Narrative (Details) $ in Thousands	Jul. 17, 2020USD ($)branch	Jul. 01, 2020USD ($)numberNewPreferredStockSeriesofficestateshares	Sep. 30, 2020USD ($)shares	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)shares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)shares	Apr. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Business Acquisition [Line Items]
Number of common stock issued | shares		243,000,000	554,787,728		554,787,728		311,469,056
Number of new series of preferred stock | numberNewPreferredStockSeries		3
Assets			$ 83,029,579		$ 83,029,579		$ 43,310,900
Total loans, net of unearned income and allowance for loan losses			58,718,429		58,718,429		30,860,804
Securities available for sale at fair value			7,995,872		7,995,872		4,445,403
Deposits			68,408,907		68,408,907		32,429,535
Goodwill			1,510,431	$ 1,432,787	1,510,431	$ 1,432,787	$ 1,432,787		$ 1,432,787
Purchase accounting gain			532,150	$ 0	$ 532,150	$ 0
Core deposit intangibles
Business Acquisition [Line Items]
Finite-lived intangible asset, estimated useful life					10 years
Subprime Consumer Loans | Discontinued Operations, Held-for-sale
Business Acquisition [Line Items]
Loans disposed of								$ 25,000
IBERIABANK (IBKC)
Business Acquisition [Line Items]
Deposits			28,231,609		$ 28,231,609
Goodwill			(532,150)		(532,150)
Purchase accounting gain		$ 532,200
SunTrust Banks, Inc. Branches
Business Acquisition [Line Items]
Number of bank branches | branch	30
Loans and leases (a)	$ 423,400
Deposits	$ 2,200,000		2,194,870		2,194,870
Deposits premium percent	3.40%
Goodwill			$ 77,644		$ 77,644
IBERIABANK (IBKC)
Business Acquisition [Line Items]
Equity interest issued, value assigned		$ 2,500,000
Number of offices | office		319
Number of states | state		12
NORTH CAROLINA | SunTrust Banks, Inc. Branches
Business Acquisition [Line Items]
Number of bank branches | branch	20
VIRGINIA | SunTrust Banks, Inc. Branches
Business Acquisition [Line Items]
Number of bank branches | branch	8
GEORGIA | SunTrust Banks, Inc. Branches
Business Acquisition [Line Items]
Number of bank branches | branch	2

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Purchase Price Allocation (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Jul. 17, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Consideration paid:
Goodwill	$ 1,510,431		$ 1,432,787	$ 1,432,787	$ 1,432,787
IBERIABANK (IBKC)
Assets:
Cash and due from banks	129,553
Interest-bearing deposits with banks	1,947,933
Securities available for sale at fair value	3,544,364
Loans held for sale	319,743
Loans and leases (a)	25,917,828
Allowance for loan and lease losses	(284,457)
Other intangible assets	237,763
Premises and equipment	310,617
Other real estate owned ("OREO")	8,593
Other assets	1,126,786
Total assets acquired	33,258,723
Liabilities:
Deposits	28,231,609
Short-term borrowings	208,733
Term borrowings	1,199,533
Other liabilities	585,143
Total liabilities assumed	30,225,018
Net assets acquired	3,033,705
Consideration paid:
Consideration for outstanding common stock	28,291
Cash in lieu of fractional shares	12
Total consideration paid	2,501,555
Goodwill	(532,150)
IBERIABANK (IBKC) | Commercial | Sales-Type And Direct Financing Leases
Assets:
Loans and leases (a)	1,300,000
IBERIABANK (IBKC) | Preferred Stock
Consideration paid:
Consideration for outstanding common stock	230,641
IBERIABANK (IBKC) | Common Stock
Consideration paid:
Consideration for outstanding common stock	2,242,611
SunTrust Banks, Inc. Branches
Assets:
Cash and due from banks	2,201,685
Loans and leases (a)	423,397
Allowance for loan and lease losses	2,355
Other intangible assets	7,000
Premises and equipment	10,965
Other assets	27,700
Total assets acquired	2,668,392
Liabilities:
Deposits	2,194,870	$ 2,200,000
Other liabilities	29,733
Total liabilities assumed	2,224,603
Net assets acquired	443,789
Consideration paid:
Cash in lieu of fractional shares	521,433
Total consideration paid	521,433
Goodwill	$ 77,644

Acquisitions and Divestitures_3

Acquisitions and Divestitures - Merger and Integration Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
IBERIABANK (IBKC)
Business Acquisition [Line Items]
Merger and integration expense	$ 95,968		$ 107,029
IBERIABANK (IBKC) | Legal and professional fees
Business Acquisition [Line Items]
Merger and integration expense	29,984		34,394
IBERIABANK (IBKC) | Personal expense
Business Acquisition [Line Items]
Merger and integration expense	34,846		40,240
IBERIABANK (IBKC) | Contribution expense
Business Acquisition [Line Items]
Merger and integration expense	20,000		20,000
IBERIABANK (IBKC) | Miscellaneous expense
Business Acquisition [Line Items]
Merger and integration expense	11,138		12,395
SunTrust Banks, Inc. Branches
Business Acquisition [Line Items]
Merger and integration expense	4,825	$ 8,989	13,862	$ 23,296
SunTrust Banks, Inc. Branches | Legal and professional fees
Business Acquisition [Line Items]
Merger and integration expense	1,196	3,507	3,322	9,852
SunTrust Banks, Inc. Branches | Personal expense
Business Acquisition [Line Items]
Merger and integration expense	303	1,473	786	4,462
SunTrust Banks, Inc. Branches | Contract employment and outsourcing
Business Acquisition [Line Items]
Merger and integration expense	203	223	929	240
SunTrust Banks, Inc. Branches | Net occupancy expense
Business Acquisition [Line Items]
Merger and integration expense	449	(76)	342	1,547
SunTrust Banks, Inc. Branches | Miscellaneous expense
Business Acquisition [Line Items]
Merger and integration expense	951	1,022	2,276	2,170
SunTrust Banks, Inc. Branches | All other expense
Business Acquisition [Line Items]
Merger and integration expense	$ 1,723	$ 2,840	$ 6,207	$ 5,025

Acquisitions and Divestitures_4

Acquisitions and Divestitures - Pro Forma (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Net interest income, Actual	$ 222,912
Non-interest income, Actual	89,510
Net interest income	(41,750)
IBERIABANK (IBKC)
Business Acquisition [Line Items]
Net interest income	550,636	$ 566,174	$ 1,691,623	$ 1,711,502
Noninterest income	290,773	235,409	783,132	645,781
Net income (loss)	$ 71,162	$ 218,572	$ 359,214	$ 654,884

Investment Securities - Schedul

Investment Securities - Schedule Of FHN's Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	$ 7,812,737
Securities available-for-sale	7,995,872	$ 4,445,403
Securities pledged as collateral	5,700,000	3,800,000
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	300,037	100
Securities available for sale, gross unrealized gains	0	0
Securities available for sale, gross unrealized losses	(3)	0
Securities available-for-sale	300,034	100
Government agency issued MBS
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	3,731,490	2,316,381
Securities available for sale, gross unrealized gains	97,734	34,692
Securities available for sale, gross unrealized losses	(2,158)	(2,556)
Securities available-for-sale	3,827,066	2,348,517
Government agency issued CMO
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	2,675,192	1,667,773
Securities available for sale, gross unrealized gains	31,694	9,916
Securities available for sale, gross unrealized losses	(1,439)	(7,197)
Securities available-for-sale	2,705,447	1,670,492
Other U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	644,328	303,463
Securities available for sale, gross unrealized gains	13,942	3,750
Securities available for sale, gross unrealized losses	(4)	(1,121)
Securities available-for-sale	658,266	306,092
Corporates and other debt
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	39,936	40,054
Securities available for sale, gross unrealized gains	74	486
Securities available for sale, gross unrealized losses	0	0
Securities available-for-sale	40,010	40,540
States and municipalities
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	421,754	57,232
Securities available for sale, gross unrealized gains	10,342	3,324
Securities available for sale, gross unrealized losses	(6)	(30)
Securities available-for-sale	432,090	60,526
Securities available-for-sale, excluding interest only strip:
Debt Securities, Available-for-sale [Line Items]
Securities available for sale, amortized cost	7,812,737	4,385,003
Securities available for sale, gross unrealized gains	153,786	52,168
Securities available for sale, gross unrealized losses	(3,610)	(10,904)
Securities available-for-sale	7,962,913	4,426,267
Interest- only strips- AFS
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale	$ 32,959	$ 19,136

Investment Securities - Sched_2

Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Available-for-Sale, Amortized Cost
Within 1 year	$ 453,324
After 1 year; within 5 years	192,172
After 5 years; within 10 years	152,870
After 10 years	607,689
Subtotal	1,406,055
Government agency issued MBS and CMO	6,406,682
Securities available for sale, amortized cost	7,812,737
Available-for-Sale, Fair Value
Securities available-for-sale	7,995,872	$ 4,445,403
Securities available-for-sale, excluding interest only strip:
Available-for-Sale, Amortized Cost
Securities available for sale, amortized cost	7,812,737	4,385,003
Available-for-Sale, Fair Value
Within 1 year	455,069
After 1 year; within 5 years	196,096
After 5 years; within 10 years	160,078
After 10 years	619,157
Subtotal	1,430,400
Government agency issued MBS and CMO	6,532,513
Securities available-for-sale	$ 7,962,913	$ 4,426,267

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Marketable Securities [Abstract]
Gross gains on sales of debt securities	$ 1,442	$ 0	$ 1,442	$ 0
Gross (losses) on sales of debt securities	(2,765)	0	(2,765)	(267)
Net gain/(loss) on sales of securities	$ (1,323)	$ 0	$ (1,323)	(267)
Cash proceeds				$ 182,800

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, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Less than 12 months	$ 1,541,140	$ 655,820
12 months or longer	0	553,979
Total fair value	1,541,140	1,209,799
Unrealized Losses
Less than 12 months	(3,610)	(3,616)
12 months or longer	0	(7,288)
Total unrealized losses	(3,610)	(10,904)
U.S. treasuries
Schedule of Investments [Line Items]
Less than 12 months	299,934	0
12 months or longer	0	100
Total fair value	299,934	100
Unrealized Losses
Less than 12 months	(3)	0
12 months or longer	0	0
Total unrealized losses	(3)	0
Government agency issued MBS
Schedule of Investments [Line Items]
Less than 12 months	568,733	174,983
12 months or longer	0	192,755
Total fair value	568,733	367,738
Unrealized Losses
Less than 12 months	(2,158)	(495)
12 months or longer	0	(2,061)
Total unrealized losses	(2,158)	(2,556)
Government agency issued CMO
Schedule of Investments [Line Items]
Less than 12 months	636,386	378,815
12 months or longer	0	361,124
Total fair value	636,386	739,939
Unrealized Losses
Less than 12 months	(1,439)	(1,970)
12 months or longer	0	(5,227)
Total unrealized losses	(1,439)	(7,197)
Other U.S. government agencies
Schedule of Investments [Line Items]
Less than 12 months	30,896	98,471
12 months or longer	0	0
Total fair value	30,896	98,471
Unrealized Losses
Less than 12 months	(4)	(1,121)
12 months or longer	0	0
Total unrealized losses	(4)	(1,121)
States and municipalities
Schedule of Investments [Line Items]
Less than 12 months	5,191	3,551
12 months or longer	0	0
Total fair value	5,191	3,551
Unrealized Losses
Less than 12 months	(6)	(30)
12 months or longer	0	0
Total unrealized losses	$ (6)	$ (30)

Investment Securities - Narrati

Investment Securities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Marketable Securities [Abstract]
Available-for-sale, accrued interest, after allowance for credit loss	$ 21.8		$ 21.8
Carrying amount of equity investments without a readily determinable fair value	55.2		55.2		$ 25.6
Unrealized gain (loss) for equity investments with readily determinable fair values	$ 1.2	$ 0.4	$ (3.6)	$ 4.9

Loans and Leases - Schedule Of

Loans and Leases - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 59,706,531		$ 31,061,111
Allowance for loan and lease losses	(988,102)	$ (537,881)	(200,307)	$ (193,149)	$ (192,749)	$ (180,424)
Net loans and leases	58,718,429		30,860,804
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	524,200
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	33,655,717		20,051,091
Allowance for loan and lease losses			(158,598)
Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	28,048,649		15,640,208
Allowance for loan and lease losses	(489,094)	(318,722)	(122,486)	(114,130)	(116,096)	(98,947)
Commercial | Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,607,068		4,410,883
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	12,510,887		4,337,017
Allowance for loan and lease losses	(207,958)	(57,285)	(36,112)	(35,625)	(32,953)	(31,311)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	12,327,869		6,177,139
Consumer | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,549,837		1,287,441
Consumer | R/E installment loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	9,778,032		4,889,698
Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,212,058		495,864
Allowance for loan and lease losses	$ (25,620)	$ (18,117)	$ (13,266)	$ (12,720)	$ (12,168)	$ (12,727)

Loans and Leases - Concentratio

Loans and Leases - Concentrations and Restrictions (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 59,706,531	$ 31,061,111
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	33,655,717	20,051,091
Commercial | Commercial, Financial, and Industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 28,048,649	15,640,208
Commercial | Commercial, Financial, and Industrial (a) | Finance And Insurance Companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage contributed in total loan	5.00%
Loans, net of unearned income	$ 3,100,000
Percentage of commercial & industrial loan portfolio	9.00%
Commercial | Commercial, Financial, and Industrial (a) | Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage contributed in total loan	9.00%
Loans, net of unearned income	$ 5,607,068	4,410,883
Percentage of commercial & industrial loan portfolio	17.00%
Percentage Contributed	26.00%
Commercial | Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 5,607,068	$ 4,410,883
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage contributed in total loan	21.00%

Loans and Leases - Asset Qualit

Loans and Leases - Asset Quality Indicators (Details) - Commercial	Sep. 30, 2020
Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	14
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	15
Minimum | PD Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lowest expected default probability	1
Minimum | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1
Minimum | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13
Maximum | Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16
Maximum | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	12

Loans and Leases - Balances Of

Loans and Leases - Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	$ 59,706,531	$ 31,061,111
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	33,655,717	20,051,091
Commercial, Financial, and Industrial (a) | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	7,989,617
2019	5,957,318
2018	3,199,379
2017	1,991,389
2016	1,428,958
Prior to 2016	2,542,229
Non-Revolving Loans	5,607,068
Revolving Loans	4,821,796
Revolving Loans converted to term loans	117,963
Total loans, net of unearned income	28,048,649	15,640,208
Financing Receivable, Revolving, Converted to Term Loan During Period	40,000
Commercial, Financial, and Industrial (a) | PD Grade 1 -12 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	7,795,816
2019	5,770,378
2018	3,036,673
2017	1,917,886
2016	1,323,236
Prior to 2016	2,414,920
Non-Revolving Loans	5,607,068
Revolving Loans	4,533,240
Revolving Loans converted to term loans	60,592
Total loans, net of unearned income	32,459,809
Commercial, Financial, and Industrial (a) | PD Grade 13 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	86,675
2019	75,224
2018	53,067
2017	22,692
2016	45,640
Prior to 2016	80,438
Non-Revolving Loans	0
Revolving Loans	123,383
Revolving Loans converted to term loans	47,364
Total loans, net of unearned income	534,483
Commercial, Financial, and Industrial (a) | PD Grade 14 15 16 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	107,126
2019	111,716
2018	109,639
2017	50,811
2016	60,082
Prior to 2016	46,871
Non-Revolving Loans	0
Revolving Loans	165,173
Revolving Loans converted to term loans	10,007
Total loans, net of unearned income	661,425
Commercial real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	12,510,887	4,337,017
Commercial real estate | CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	2,114,932
2019	3,278,452
2018	2,059,080
2017	1,486,788
2016	1,147,528
Prior to 2016	2,093,125
Revolving Loans	312,146
Revolving Loans converted to term loans	18,836
Total loans, net of unearned income	12,510,887	$ 4,332,042
Commercial real estate | PD Grade 1 -12 | CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	2,099,167
2019	3,244,741
2018	1,940,046
2017	1,410,004
2016	1,056,094
Prior to 2016	2,015,504
Revolving Loans	300,752
Revolving Loans converted to term loans	18,836
Total loans, net of unearned income	12,085,144
Commercial real estate | PD Grade 13 | CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	15,089
2019	31,230
2018	97,016
2017	35,573
2016	83,254
Prior to 2016	45,875
Revolving Loans	4,065
Revolving Loans converted to term loans	0
Total loans, net of unearned income	312,102
Commercial real estate | PD Grade 14 15 16 | CRE | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	676
2019	2,481
2018	22,018
2017	41,211
2016	8,180
Prior to 2016	31,746
Revolving Loans	7,329
Revolving Loans converted to term loans	0
Total loans, net of unearned income	$ 113,641

Loans and Leases - Balances O_2

Loans and Leases - Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade and Sub Class (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 988,102	$ 537,881	$ 200,307	$ 193,149	$ 192,749	$ 180,424
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			$ 24,388,108
Loan balances percentage of total			100.00%
Allowance for loan and lease losses			$ 158,598
Collectively evaluated for impairment			$ 24,273,207
Percent loan collectively evaluated for impairment			100.00%
Charge-offs			$ 151,554
Individually evaluated for impairment			$ 84,001
Percent loan individually evaluated for impairment			0.00%
Balance as of January 1, 2019			$ 6,196
Purchased credit-impaired loans			$ 30,900
Percent loan purchased credit impaired			0.00%
Allowance - purchased credit-impaired loans			$ 848
Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	489,094	$ 318,722	122,486	$ 114,130	$ 116,096	$ 98,947
C&I | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			15,640,208
Collectively evaluated for impairment			15,531,845
Individually evaluated for impairment			82,438
Purchased credit-impaired loans			25,925
Loans to mortgage companies | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			4,410,883
Collectively evaluated for impairment			4,410,883
Individually evaluated for impairment			0
Purchased credit-impaired loans			0
CRE | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			4,337,017
Collectively evaluated for impairment			4,330,479
Individually evaluated for impairment			1,563
Purchased credit-impaired loans			4,975
TRUPS | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 18,200		19,100
PD Grade 1 -12 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			$ 23,699,190
Loan balances percentage of total			98.00%
Allowance for loan and lease losses			$ 114,094
PD Grade 1 -12 | C&I | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			15,035,946
PD Grade 1 -12 | Loans to mortgage companies | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			4,410,883
PD Grade 1 -12 | CRE | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			4,252,361
PD Grade 13 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			$ 266,915
Loan balances percentage of total			1.00%
Allowance for loan and lease losses			$ 8,142
PD Grade 13 | C&I | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			232,823
PD Grade 13 | Loans to mortgage companies | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			0
PD Grade 13 | CRE | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			34,092
PD Grade 14 15 16 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			$ 307,102
Loan balances percentage of total			1.00%
Allowance for loan and lease losses			$ 29,318
PD Grade 14 15 16 | C&I | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			263,076
PD Grade 14 15 16 | Loans to mortgage companies | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			0
PD Grade 14 15 16 | CRE | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan balance			$ 44,026

Loans and Leases - Loans by FIC

Loans and Leases - Loans by FICO Score, Consumer (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	$ 59,706,531	$ 31,061,111
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	12,327,869	6,177,139
Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	1,458,649
2019	1,801,575
2018	1,233,928
2017	1,022,933
2016	1,139,118
Prior to 2016	3,121,829
Revolving loans	2,141,324
Revolving Loans converted to term loans	408,513
Total loans, net of unearned income	12,327,869	6,177,139
Consumer | Consumer real estate | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	809,079
2019	1,242,805
2018	797,553
2017	677,865
2016	746,150
Prior to 2016	1,910,304
Revolving loans	1,304,498
Revolving Loans converted to term loans	178,921
Total loans, net of unearned income	7,667,175
Consumer | Consumer real estate | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	96,670
2019	168,223
2018	110,859
2017	81,669
2016	93,933
Prior to 2016	205,824
Revolving loans	204,419
Revolving Loans converted to term loans	30,342
Total loans, net of unearned income	991,939
Consumer | Consumer real estate | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	84,995
2019	122,293
2018	89,193
2017	84,727
2016	73,587
Prior to 2016	225,227
Revolving loans	181,823
Revolving Loans converted to term loans	39,361
Total loans, net of unearned income	901,206
Consumer | Consumer real estate | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	88,346
2019	146,789
2018	143,213
2017	88,989
2016	91,062
Prior to 2016	316,577
Revolving loans	263,818
Revolving Loans converted to term loans	63,156
Total loans, net of unearned income	1,201,950
Consumer | Consumer real estate | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	21,847
2019	73,365
2018	40,104
2017	28,207
2016	36,391
Prior to 2016	140,682
Revolving loans	87,205
Revolving Loans converted to term loans	39,707
Total loans, net of unearned income	467,508
Consumer | Consumer real estate | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	357,712
2019	48,100
2018	53,006
2017	61,476
2016	97,995
Prior to 2016	323,215
Revolving loans	99,561
Revolving Loans converted to term loans	57,026
Total loans, net of unearned income	1,098,091
Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	111,217
2019	105,688
2018	128,504
2017	90,662
2016	74,463
Prior to 2016	313,535
Revolving loans	372,706
Revolving Loans converted to term loans	15,283
Total loans, net of unearned income	1,212,058	495,864
Consumer | Credit Card and Other | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	45,014
2019	60,629
2018	67,379
2017	44,445
2016	27,990
Prior to 2016	129,793
Revolving loans	143,754
Revolving Loans converted to term loans	5,263
Total loans, net of unearned income	524,267
Consumer | Credit Card and Other | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	6,617
2019	8,673
2018	10,856
2017	9,913
2016	9,051
Prior to 2016	29,740
Revolving loans	90,623
Revolving Loans converted to term loans	1,630
Total loans, net of unearned income	167,103
Consumer | Credit Card and Other | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	6,172
2019	9,215
2018	9,903
2017	8,635
2016	4,567
Prior to 2016	42,102
Revolving loans	41,039
Revolving Loans converted to term loans	1,731
Total loans, net of unearned income	123,364
Consumer | Credit Card and Other | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	27,173
2019	14,206
2018	16,352
2017	11,032
2016	10,600
Prior to 2016	53,772
Revolving loans	54,963
Revolving Loans converted to term loans	3,737
Total loans, net of unearned income	191,835
Consumer | Credit Card and Other | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	3,526
2019	5,559
2018	7,990
2017	5,761
2016	12,823
Prior to 2016	29,168
Revolving loans	19,492
Revolving Loans converted to term loans	1,406
Total loans, net of unearned income	85,725
Consumer | Credit Card and Other | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	22,715
2019	7,406
2018	16,024
2017	10,876
2016	9,432
Prior to 2016	28,960
Revolving loans	22,835
Revolving Loans converted to term loans	1,516
Total loans, net of unearned income	119,764
Unsecured Debt | Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving Loans converted to term loans	5,300
HELOC | Consumer | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving Loans converted to term loans	22,700
Total loans, net of unearned income	$ 2,549,837	$ 1,286,875

Loans and Leases - Loans by F_2

Loans and Leases - Loans by FICO Score Percentage, Consumer (Details) - Accounts Receivable - Credit Concentration Risk	12 Months Ended
	Dec. 31, 2019
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	100.00%
R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	100.00%
FICO score 740 or greater | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	62.00%
FICO score 740 or greater | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	71.90%
FICO score 720-739 | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	8.60%
FICO score 720-739 | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	8.30%
FICO score 700-719 | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	7.60%
FICO score 700-719 | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	6.30%
FICO score 660-699 | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	10.80%
FICO score 660-699 | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	8.10%
FICO score 620-659 | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	4.70%
FICO score 620-659 | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	2.80%
FICO score less than 620 | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	6.30%
FICO score less than 620 | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	2.60%

Loans and Leases - Accruing And

Loans and Leases - Accruing And Non-Accruing Loans By Class (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	$ 59,171,038		$ 30,841,035
Total Accruing	59,259,695		30,898,946
Current, Non-Accruing	272,103		100,382
Total Non-Accruing	446,836		162,165
Total loans, net of unearned income	59,706,531		31,061,111
Allowance for loan and lease losses	988,102	$ 537,881	200,307	$ 193,149	$ 192,749	$ 180,424
30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	74,042		36,052
Past Due, Non-Accruing	36,600		20,217
90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	14,615		21,859
Past Due, Non-Accruing	138,133		41,566
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	33,655,717		20,051,091
Allowance for loan and lease losses			158,598
Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	33,422,866		19,967,302
Total Accruing	33,442,907		19,976,779
Current, Non-Accruing	126,674		36,564
Total Non-Accruing	212,810		74,312
Total loans, net of unearned income	28,048,649		15,640,208
Allowance for loan and lease losses	489,094	318,722	122,486	114,130	116,096	98,947
Commercial | Commercial and industrial (a) | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	19,892		7,442
Past Due, Non-Accruing	25,327		14,385
Commercial | Commercial and industrial (a) | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	149		2,035
Past Due, Non-Accruing	60,809		23,363
Commercial | Commercial and industrial (a) | C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	27,815,798		15,532,579
Total Accruing	27,835,839		15,539,971
Current, Non-Accruing	126,674		36,564
Total Non-Accruing	212,810		74,312
Total loans, net of unearned income	28,048,649		15,614,283
Nonaccrual, no allowance	125,700
Commercial | Commercial and industrial (a) | C&I | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	19,892		7,155
Past Due, Non-Accruing	25,327		14,385
Commercial | Commercial and industrial (a) | C&I | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	149		237
Past Due, Non-Accruing	60,809		23,363
Commercial | Commercial and industrial (a) | Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	5,607,068		4,410,883
Total Accruing	5,607,068		4,410,883
Current, Non-Accruing	0		0
Total Non-Accruing	0		0
Total loans, net of unearned income	5,607,068		4,410,883
Commercial | Commercial and industrial (a) | Loans to mortgage companies | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	0		0
Past Due, Non-Accruing	0		0
Commercial | Commercial and industrial (a) | Loans to mortgage companies | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	0		0
Past Due, Non-Accruing	0		0
Commercial | Commercial and industrial (a) | TRUPS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	209,400		218,300
Allowance for loan and lease losses	18,200		19,100
Commercial | Commercial and industrial (a) | C&I Purchase Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing			23,840
Total Accruing			25,925
Current, Non-Accruing			0
Total Non-Accruing			0
Total loans, net of unearned income			25,925
Commercial | Commercial and industrial (a) | C&I Purchase Credit Impaired Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			287
Past Due, Non-Accruing			0
Commercial | Commercial and industrial (a) | C&I Purchase Credit Impaired Loans | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			1,798
Past Due, Non-Accruing			0
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing			4,334,283
Total Accruing			4,335,192
Current, Non-Accruing			0
Total Non-Accruing			1,825
Total loans, net of unearned income	12,510,887		4,337,017
Allowance for loan and lease losses	207,958	57,285	36,112	35,625	32,953	31,311
Commercial | Commercial real estate | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			814
Past Due, Non-Accruing			485
Commercial | Commercial real estate | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			95
Past Due, Non-Accruing			1,340
Commercial | Commercial real estate | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing			4,329,531
Total Accruing			4,330,217
Current, Non-Accruing			0
Total Non-Accruing			1,825
Total loans, net of unearned income	12,510,887		4,332,042
Commercial | Commercial real estate | CRE | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			686
Past Due, Non-Accruing			485
Commercial | Commercial real estate | CRE | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			0
Past Due, Non-Accruing			1,340
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing			4,752
Total Accruing			4,975
Current, Non-Accruing			0
Total Non-Accruing			0
Total loans, net of unearned income			4,975
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			128
Past Due, Non-Accruing			0
Commercial | Commercial real estate | CRE Purchase Credit Impaired Loans | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			95
Past Due, Non-Accruing			0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of unearned income	12,327,869		6,177,139
Consumer | Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	12,099,420		6,048,510
Total Accruing	12,147,781		6,091,445
Current, Non-Accruing	101,707		63,717
Total Non-Accruing	180,088		85,694
Total loans, net of unearned income	12,327,869		6,177,139
Allowance for loan and lease losses	265,430	143,757	28,443	30,674	31,532	37,439
Consumer | Consumer Real Estate | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	34,806		24,820
Past Due, Non-Accruing	8,022		5,303
Consumer | Consumer Real Estate | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	13,555		18,115
Past Due, Non-Accruing	70,359		16,674
Consumer | Consumer Real Estate | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	2,467,907		1,217,344
Total Accruing	2,486,683		1,232,169
Current, Non-Accruing	47,101		43,007
Total Non-Accruing	63,154		54,706
Total loans, net of unearned income	2,549,837		1,286,875
Consumer | Consumer Real Estate | HELOC | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	11,884		9,156
Past Due, Non-Accruing	4,628		4,227
Consumer | Consumer Real Estate | HELOC | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	6,892		5,669
Past Due, Non-Accruing	11,425		7,472
Consumer | Consumer Real Estate | R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	9,631,513		4,812,446
Total Accruing	9,661,098		4,834,510
Current, Non-Accruing	54,606		20,710
Total Non-Accruing	116,934		30,988
Total loans, net of unearned income	9,778,032		4,865,498
Consumer | Consumer Real Estate | R/E Installment Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	22,922		12,894
Past Due, Non-Accruing	3,394		1,076
Consumer | Consumer Real Estate | R/E Installment Loans | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	6,663		9,170
Past Due, Non-Accruing	58,934		9,202
Consumer | Consumer Real Estate | RE Installment Purchase Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing			18,720
Total Accruing			24,766
Current, Non-Accruing			0
Total Non-Accruing			0
Total loans, net of unearned income			24,766
Consumer | Consumer Real Estate | RE Installment Purchase Credit Impaired Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			2,770
Past Due, Non-Accruing			0
Consumer | Consumer Real Estate | RE Installment Purchase Credit Impaired Loans | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			3,276
Past Due, Non-Accruing			0
Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	1,204,059		490,940
Total Accruing	1,209,181		495,530
Current, Non-Accruing	1,205		101
Total Non-Accruing	2,877		334
Total loans, net of unearned income	1,212,058		495,864
Allowance for loan and lease losses	25,620	$ 18,117	13,266	$ 12,720	$ 12,168	$ 12,727
Consumer | Credit Card and Other | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	4,211		2,976
Past Due, Non-Accruing	720		44
Consumer | Credit Card and Other | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	911		1,614
Past Due, Non-Accruing	952		189
Consumer | Credit Card and Other | Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	267,880		198,917
Total Accruing	270,182		201,171
Current, Non-Accruing	242		0
Total Non-Accruing	329		0
Total loans, net of unearned income	270,511		201,171
Consumer | Credit Card and Other | Credit Card | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	1,513		1,076
Past Due, Non-Accruing	38		0
Consumer | Credit Card and Other | Credit Card | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	789		1,178
Past Due, Non-Accruing	49		0
Consumer | Credit Card and Other | Other Consumer Loans Class
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	936,179		291,700
Total Accruing	938,999		293,839
Current, Non-Accruing	963		101
Total Non-Accruing	2,548		334
Total loans, net of unearned income	941,547		294,173
Consumer | Credit Card and Other | Other Consumer Loans Class | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	2,698		1,802
Past Due, Non-Accruing	682		44
Consumer | Credit Card and Other | Other Consumer Loans Class | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	122		337
Past Due, Non-Accruing	903		189
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing			323
Total Accruing			520
Current, Non-Accruing			0
Total Non-Accruing			0
Total loans, net of unearned income			520
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			98
Past Due, Non-Accruing			0
Consumer | Credit Card and Other | Other Purchased Credit Impaired Loans | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing			99
Past Due, Non-Accruing			$ 0
Commercial real estate | Commercial real estate | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, Accruing	12,444,693
Total Accruing	12,459,826
Current, Non-Accruing	42,517
Total Non-Accruing	51,061
Total loans, net of unearned income	12,510,887
Commercial real estate | Commercial real estate | CRE | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	15,133
Past Due, Non-Accruing	2,531
Commercial real estate | Commercial real estate | CRE | 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Accruing	0
Past Due, Non-Accruing	$ 6,013

Loans and Leases - Narrative (D

Loans and Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	$ 177,500	$ 177,500	$ 84,600
Loans and leases (including $12,372 and $— at fair value, respectively)	59,706,531	59,706,531	31,061,111
Troubled debt restructurings loans	321,400	321,400	206,300
Allowance for loan and lease losses	988,102	988,102	200,307	$ 537,881	$ 193,149	$ 192,749	$ 180,424
Bank Overdrafts	9,000	9,000	8,100
Net loans and leases	58,718,429	58,718,429	30,860,804
Asset Pledged as Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net loans and leases	39,400,000	39,400,000	19,200,000
SunTrust Banks, Inc. Branches
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	423,400	423,400
Allowance For TDRs To Recorded Investment Of TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 12,600	$ 12,600	$ 19,700
Ratio of the allowance for loan losses to loans	4.00%	4.00%	10.00%
Loans Held For Sale, Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings loans	$ 44,100	$ 44,100	$ 51,100
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	33,655,717	33,655,717	20,051,091
Allowance for loan and lease losses			158,598
Allowance - purchased credit-impaired loans			848
Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	28,048,649	28,048,649	15,640,208
Allowance for loan and lease losses	489,094	489,094	122,486	318,722	114,130	116,096	98,947
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	12,327,869	12,327,869	6,177,139
Consumer | Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	12,327,869	12,327,869	6,177,139
Allowance for loan and lease losses	265,430	265,430	28,443	143,757	30,674	31,532	37,439
Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	1,212,058	1,212,058	495,864
Allowance for loan and lease losses	$ 25,620	$ 25,620	13,266	18,117	$ 12,720	$ 12,168	$ 12,727
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage contributed in total loan	21.00%	21.00%
TRUPS | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	$ 209,400	$ 209,400	218,300
Allowance for loan and lease losses	18,200	18,200	19,100
Credit Card | Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	270,511	270,511	201,171
Finance And Insurance Companies | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	$ 3,100,000	$ 3,100,000
Percentage of commercial & industrial loan portfolio	9.00%	9.00%
Percentage contributed in total loan	5.00%	5.00%
Loans to mortgage companies | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	$ 5,607,068	$ 5,607,068	4,410,883
Percentage of commercial & industrial loan portfolio	17.00%	17.00%
Percentage contributed in total loan	9.00%	9.00%
Percentage Contributed	26.00%	26.00%
C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral for secured borrowings	$ 247,700	$ 247,700
Allowance for credit loss, writeoff, collateral	18,100	31,100
C&I | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	28,048,649	28,048,649	15,614,283
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral for secured borrowings	9,700	9,700
HELOC | Consumer | Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	2,549,837	2,549,837	1,286,875
R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral for secured borrowings	26,200	26,200
R/E Installment Loans | Consumer | Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	$ 9,778,032	$ 9,778,032	4,865,498
Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses			286,811	286,811
Allowance - purchased credit-impaired loans			2,000
Allowance for loan and lease losses write-offs, net			5,800
Provision for loan, lease, and other losses			1,300
Financial Asset Acquired with Credit Deterioration | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses			137,702	137,702
Financial Asset Acquired with Credit Deterioration | Consumer | Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses			44,141	44,141
Financial Asset Acquired with Credit Deterioration | Consumer | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses			4,845	$ 4,845
PD Grade 1 | Minimum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lowest expected default probability	1	1
Loss | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16	16
Loss | Maximum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16	16
Pass | Minimum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1	1
Pass | Maximum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	12	12
Special Mention | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13	13
Special Mention | Minimum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	13	13
Substandard | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	14	14
Doubtful | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	15	15
PD Grade 13 | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses			$ 8,142
PD Grade 13 | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	$ 534,483	$ 534,483
Paycheck Protection Plan | Commercial | Commercial and industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	$ 4,200,000	$ 4,200,000

Loans and Leases - Schedule O_2

Loans and Leases - Schedule Of Troubled Debt Restructurings Occurring During The Year (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	186	65	292	211
Pre-Modification Outstanding Recorded Investment	$ 150,907	$ 3,605	$ 172,105	$ 32,239
Post-Modification Outstanding Recorded Investment	$ 140,098	$ 3,670	$ 159,747	$ 32,141
Commercial | Commercial, Financial, and Industrial (a)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	83	1	87	4
Pre-Modification Outstanding Recorded Investment	$ 130,281	$ 62	$ 140,857	$ 14,179
Post-Modification Outstanding Recorded Investment	$ 119,591	$ 59	$ 128,723	$ 14,101
Commercial | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	14		14
Pre-Modification Outstanding Recorded Investment	$ 11,848		$ 11,848
Post-Modification Outstanding Recorded Investment	$ 11,825		$ 11,825
Consumer | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	79	29	141	139
Pre-Modification Outstanding Recorded Investment	$ 8,698	$ 3,409	$ 19,066	$ 17,743
Post-Modification Outstanding Recorded Investment	$ 8,606	$ 3,485	$ 18,886	$ 17,740
Consumer | Credit Card and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	10	35	50	68
Pre-Modification Outstanding Recorded Investment	$ 80	$ 134	$ 334	$ 317
Post-Modification Outstanding Recorded Investment	$ 76	$ 126	$ 313	$ 300
C&I | Commercial | Commercial, Financial, and Industrial (a)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	83	1	87	4
Pre-Modification Outstanding Recorded Investment	$ 130,281	$ 62	$ 140,857	$ 14,179
Post-Modification Outstanding Recorded Investment	$ 119,591	$ 59	$ 128,723	$ 14,101
HELOC | Consumer | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	35	13	47	57
Pre-Modification Outstanding Recorded Investment	$ 2,623	$ 1,638	$ 3,687	$ 7,013
Post-Modification Outstanding Recorded Investment	$ 2,584	$ 1,631	$ 3,626	$ 6,950
R/E Installment Loans | Consumer | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	44	16	94	82
Pre-Modification Outstanding Recorded Investment	$ 6,075	$ 1,771	$ 15,379	$ 10,730
Post-Modification Outstanding Recorded Investment	$ 6,022	$ 1,854	$ 15,260	$ 10,790
CRE | Commercial | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	14		14
Pre-Modification Outstanding Recorded Investment	$ 11,848		$ 11,848
Post-Modification Outstanding Recorded Investment	$ 11,825		$ 11,825

Loans and Leases - Schedule O_3

Loans and Leases - Schedule Of Troubled Debt Restructurings Within The Previous 12 Months (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	14	11	45	29
Recorded Investment | $	$ 895	$ 151	$ 899	$ 320
Commercial | Commercial, Financial, and Industrial (a)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Consumer | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	7	3	24	6
Recorded Investment | $	$ 871	$ 106	$ 875	$ 243
Consumer | Credit Card and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	7	8	21	23
Recorded Investment | $	$ 24	$ 45	$ 24	$ 77
C&I | Commercial | Commercial, Financial, and Industrial (a)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
HELOC | Consumer | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	1	2	8	4
Recorded Investment | $	$ 32	$ 99	$ 34	$ 198
R/E Installment Loans | Consumer | Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | loan	6	1	16	2
Recorded Investment | $	$ 839	$ 7	$ 841	$ 45

Loans and Leases - Accrued Inte

Loans and Leases - Accrued Interest (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	$ 177.5	$ 84.6

Loans and Leases - Loans Acquir

Loans and Leases - Loans Acquired with Deteriorated Credit Quality (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par value (UPB)	$ 13,097,140
Allowance for Loan Losses (a)	(286,811)
(Discount) Premium	(92,610)
Purchase Price	12,717,719
C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par value (UPB)	4,074,927
Allowance for Loan Losses (a)	(137,702)
(Discount) Premium	(64,328)
Purchase Price	3,872,897
CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par value (UPB)	6,435,556
Allowance for Loan Losses (a)	(100,123)
(Discount) Premium	3,485
Purchase Price	6,338,918
Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par value (UPB)	2,393,677
Allowance for Loan Losses (a)	(44,141)
(Discount) Premium	(31,764)
Purchase Price	2,317,772
Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par value (UPB)	192,980
Allowance for Loan Losses (a)	(4,845)
(Discount) Premium	(3)
Purchase Price	$ 188,132

Loans and Leases - Certain Loan

Loans and Leases - Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Movement Schedule Rollforward (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 13,375
Accretion	(5,792)
Adjustment for payoffs	(2,438)
Adjustment for charge-offs	(479)
Adjustment for pool excess recovery	0
Increase/(decrease) in accretable yield	5,513
Disposal	(4)
Other	(367)
Balance, end of period	$ 9,808

Loans and Leases - Schedule O_4

Loans and Leases - Schedule Of Acquired Purchase Credit Impaired Loans By Portfolio Segment (Details) $ in Thousands	Dec. 31, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 54,221
Unpaid balance	58,216
Commercial and industrial (a) | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	24,973
Unpaid balance	25,938
Commercial Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	5,078
Unpaid balance	5,466
Consumer Real Estate | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	23,681
Unpaid balance	26,245
Credit Card and Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	489
Unpaid balance	$ 567

Loans and Leases - Information

Loans and Leases - Information By Class Related To Individually Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2019
Recorded Investment
Recorded Investment			$ 246,900
Unpaid Principal Balance
Unpaid Principal Balance			281,089
Related Allowance			25,916
Average Recorded Investment
Average Recorded Investment	$ 280,655	$ 275,478
Interest Income Recognized
Interest Income Recognized	1,420	4,485
Commercial
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment			54,235
Impaired loans with related allowance recorded, Recorded investment			29,766
Recorded Investment			84,001
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance			65,165
Impaired loans with related allowance recorded, Unpaid principal balance			31,536
Unpaid Principal Balance			96,701
Related Allowance			6,196
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	84,876	76,548
Impaired loans with related allowance recorded, Average recorded investment	17,539	13,992
Average Recorded Investment	102,415	90,540
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	176	560
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	4	13
Interest Income Recognized	180	573
Consumer
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment			12,533
Impaired loans with related allowance recorded, Recorded investment			150,366
Recorded Investment			162,899
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance			20,492
Impaired loans with related allowance recorded, Unpaid principal balance			163,896
Unpaid Principal Balance			184,388
Related Allowance			19,720
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	14,642	15,416
Impaired loans with related allowance recorded, Average recorded investment	163,598	169,522
Average Recorded Investment	178,240	184,938
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	1,240	3,912
Interest Income Recognized	1,240	3,912
Commercial and industrial (a) | Commercial | C&I
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment			52,672
Impaired loans with related allowance recorded, Recorded investment			29,766
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance			63,602
Impaired loans with related allowance recorded, Unpaid principal balance			31,536
Related Allowance			6,196
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	64,558	62,553
Impaired loans with related allowance recorded, Average recorded investment	14,620	10,892
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	173	530
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	4	4
Commercial and industrial (a) | Commercial | Loans to mortgage companies
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	18,628	12,419
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Commercial and industrial (a) | Commercial | TRUPS
Average Recorded Investment
Impaired loans with related allowance recorded, Average recorded investment	2,750	2,806
Interest Income Recognized
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	0	0
Commercial real estate | Commercial | Income CRE
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment			1,563
Impaired loans with related allowance recorded, Recorded investment			0
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance			1,563
Impaired loans with related allowance recorded, Unpaid principal balance			0
Related Allowance			0
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	1,690	1,576
Impaired loans with related allowance recorded, Average recorded investment	169	294
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	3	30
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	0	9
Consumer real estate | Consumer | HELOC
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment			4,940
Impaired loans with related allowance recorded, Recorded investment			55,522
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance			10,438
Impaired loans with related allowance recorded, Unpaid principal balance			59,122
Related Allowance			7,016
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	6,495	6,852
Impaired loans with related allowance recorded, Average recorded investment	60,312	62,650
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	449	1,475
Consumer real estate | Consumer | R/E Installment Loans
Recorded Investment
Impaired loans with no related allowance recorded, Recorded investment			7,593
Impaired loans with related allowance recorded, Recorded investment			94,191
Unpaid Principal Balance
Impaired loans with no related allowance recorded, Unpaid principal balance			10,054
Impaired loans with related allowance recorded, Unpaid principal balance			104,121
Related Allowance			12,282
Average Recorded Investment
Impaired loans with no related allowance recorded, Average recorded investment	8,147	8,564
Impaired loans with related allowance recorded, Average recorded investment	102,576	106,175
Interest Income Recognized
Impaired loans with no related allowance recorded, Interest income recognized	0	0
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	787	2,424
Credit Card and Other | Consumer
Recorded Investment
Impaired loans with related allowance recorded, Recorded investment			653
Unpaid Principal Balance
Impaired loans with related allowance recorded, Unpaid principal balance			653
Related Allowance			$ 422
Average Recorded Investment
Impaired loans with related allowance recorded, Average recorded investment	710	697
Interest Income Recognized
Impaired Financing Impaired loans with related allowance recorded, Interest income recognized	$ 4	$ 13

Allowance for Credit Losses - N

Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Forecast period to estimate expected credit losses	4 years
Term to estimate expected credit losses determined by macroeconomics variable	3 years
Additional term to estimated expected credit losses determined by microeconomics variable diminishing	1 year
Measurement period of historical losses, pro rata period	1 year
Allowance for loan and lease losses	$ 988,102	$ 537,881	$ 200,307	$ 193,149	$ 192,749	$ 180,424
Consumer real estate | Commercial, Financial, and Industrial (a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average life	3 years
HELOC and R/E Installment Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average life	5 years
COVID-19 Deferrals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 1,100

Allowance for Credit Losses (De

Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 537,881	$ 192,749	$ 200,307	$ 180,424
Charge-offs	78,341	24,337	114,701	47,087
Recoveries	11,751	9,737	24,291	22,812
Provision for credit losses	227,000	14,366	502,388	36,273
Ending Balance	988,102	193,149	988,102	193,149
Loans, net of unearned income	59,706,531		59,706,531		$ 31,061,111
Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	230,000	15,000	485,000	37,000
Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	50,461	7,525	6,101	7,618
Initial reserve on loans acquired	41,259		41,259
Provision for credit losses	(3,000)	(635)	17,388	(728)
Ending Balance	88,720	6,890	88,720	6,890
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			158,598
Loans, net of unearned income	33,655,717		33,655,717		20,051,091
Commercial | Commercial, Financial, and Industrial (a)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	318,722	116,096	122,486	98,947
Charge-offs	69,448	18,598	94,400	28,289
Recoveries	3,200	3,245	5,208	4,593
Ending Balance	489,094	114,130	489,094	114,130
Loans, net of unearned income	28,048,649		28,048,649		15,640,208
Commercial | Commercial, Financial, and Industrial (a) | PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs			237,300
Commercial | Commercial, Financial, and Industrial (a) | Non-PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	147,000		147,000
Commercial | Commercial, Financial, and Industrial (a) | Paycheck Protection Plan
Allowance for Loan and Lease Losses [Roll Forward]
Loans, net of unearned income	4,200,000		4,200,000
Commercial | Commercial, Financial, and Industrial (a) | Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	98,918	13,387	299,316	38,879
Commercial | Commercial, Financial, and Industrial (a) | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	36,388	4,231	3,590	4,240
Initial reserve on loans acquired	11,760		11,760
Provision for credit losses	(1,509)	(406)	14,777	(415)
Ending Balance	46,639	3,825	46,639	3,825
Commercial | Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	57,285	32,953	36,112	31,311
Charge-offs	3,540	369	4,182	924
Recoveries	2,243	181	2,972	150
Ending Balance	207,958	35,625	207,958	35,625
Loans, net of unearned income	12,510,887		12,510,887		4,337,017
Commercial | Commercial Real Estate | Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	51,847	2,860	80,281	5,088
Commercial | Commercial Real Estate | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	6,359	3,149	2,356	3,242
Initial reserve on loans acquired	26,306		26,306
Provision for credit losses	(1,671)	(231)	1,056	(324)
Ending Balance	30,994	2,918	30,994	2,918
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Loans, net of unearned income	12,327,869		12,327,869		6,177,139
Consumer | Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	143,757	31,532	28,443	37,439
Charge-offs	1,834	1,473	6,112	5,991
Recoveries	5,311	5,055	12,853	14,621
Ending Balance	265,430	30,674	265,430	30,674
Loans, net of unearned income	12,327,869		12,327,869		6,177,139
Consumer | Consumer Real Estate | Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	74,055	(4,440)	93,113	(15,395)
Consumer | Consumer Real Estate | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	7,714	20	16	27
Initial reserve on loans acquired	3,185		3,185
Provision for credit losses	180	(5)	1,555	(12)
Ending Balance	11,079	15	11,079	15
Consumer | Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	18,117	12,168	13,266	12,727
Charge-offs	3,519	3,897	10,007	11,883
Recoveries	997	1,256	3,258	3,448
Ending Balance	25,620	12,720	25,620	12,720
Loans, net of unearned income	1,212,058		1,212,058		$ 495,864
Consumer | Credit Card and Other | Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	5,180	3,193	12,290	8,428
Consumer | Credit Card and Other | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	0	125	139	109
Initial reserve on loans acquired	8		8
Provision for credit losses	0	7	0	23
Ending Balance	8	$ 132	8	$ 132
Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			106,394
Adjustment | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			23,972
Adjustment | Commercial | Commercial, Financial, and Industrial (a)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			18,782
Adjustment | Commercial | Commercial, Financial, and Industrial (a) | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			16,512
Adjustment | Commercial | Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			(7,348)
Adjustment | Commercial | Commercial Real Estate | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			1,276
Adjustment | Consumer | Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			92,992
Adjustment | Consumer | Consumer Real Estate | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			6,323
Adjustment | Consumer | Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			1,968
Adjustment | Consumer | Credit Card and Other | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			(139)
Adjusted balance
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			306,701
Adjusted balance | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			30,073
Adjusted balance | Commercial | Commercial, Financial, and Industrial (a)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			141,268
Adjusted balance | Commercial | Commercial, Financial, and Industrial (a) | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			20,102
Adjusted balance | Commercial | Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			28,764
Adjusted balance | Commercial | Commercial Real Estate | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			3,632
Adjusted balance | Consumer | Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			121,435
Adjusted balance | Consumer | Consumer Real Estate | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			6,339
Adjusted balance | Consumer | Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			15,234
Adjusted balance | Consumer | Credit Card and Other | Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			0
Financial Asset Acquired with Credit Deterioration
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	286,811		286,811
Financial Asset Acquired with Credit Deterioration | Commercial | Commercial, Financial, and Industrial (a)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	137,702		137,702
Financial Asset Acquired with Credit Deterioration | Commercial | Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	100,123		100,123
Financial Asset Acquired with Credit Deterioration | Consumer | Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	44,141		44,141
Financial Asset Acquired with Credit Deterioration | Consumer | Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 4,845		$ 4,845

Mortgage Banking Activity (Deta

Mortgage Banking Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Mortgage Banking [Line Items]
Gross Carrying Amount	$ 22,142		$ 22,142
Valuation Allowance			(61)
Accumulated Amortization			(1,413)
Net Carrying Amount	20,668		20,668
Mortgage banking and title income	65,503	$ 2,019	72,072	$ 6,477
Mortgage banking and title income
Mortgage Banking [Line Items]
Mortgage banking and title income	$ 600	$ 500	$ 1,400	$ 1,400

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Intangible Assets [Line Items]
Gross Carrying Amount	$ 446,535	$ 240,637
Accumulated Amortization	(80,835)	(110,437)
Intangible Assets, Net (Excluding Goodwill), Total	365,700	130,200
Core deposit intangibles
Intangible Assets [Line Items]
Gross Carrying Amount	370,850	157,150
Accumulated Amortization	(68,902)	(47,372)
Intangible Assets, Net (Excluding Goodwill), Total	301,948	109,778
Customer relationships
Intangible Assets [Line Items]
Gross Carrying Amount	37,000	77,865
Accumulated Amortization	(7,037)	(60,150)
Intangible Assets, Net (Excluding Goodwill), Total	29,963	17,715
Other
Intangible Assets [Line Items]
Gross Carrying Amount	38,685	5,622
Accumulated Amortization	(4,896)	(2,915)
Intangible Assets, Net (Excluding Goodwill), Total	$ 33,789	$ 2,707

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	Jul. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense		$ 14,600,000	$ 6,200,000	$ 25,200,000	$ 18,600,000
Goodwill [Line Items]
Goodwill		1,510,431,000	1,432,787,000	1,510,431,000	1,432,787,000	$ 1,432,787,000	$ 1,432,787,000
Purchase accounting gain		532,150,000	$ 0	$ 532,150,000	0
Core deposit intangibles
Goodwill [Line Items]
Finite-lived intangible asset, estimated useful life				10 years
SunTrust Banks, Inc. Branches
Goodwill [Line Items]
Goodwill		77,644,000		$ 77,644,000
SunTrust Banks, Inc. Branches | Core deposit intangibles
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		7,000,000		7,000,000
IBERIABANK (IBKC)
Goodwill [Line Items]
Goodwill		(532,150,000)		(532,150,000)
Purchase accounting gain	$ 532,200,000
IBERIABANK (IBKC) | Core deposit intangibles
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		206,700,000		206,700,000
IBERIABANK (IBKC) | Customer relationships
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		14,000,000		14,000,000
IBERIABANK (IBKC) | State Banking Licenses [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		6,800,000		6,800,000
IBERIABANK (IBKC) | Purchased Credit Card Intangible Assets [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		10,300,000		10,300,000
Non-Strategic
Goodwill [Line Items]
Gross goodwill		200,000,000		200,000,000		200,000,000
Accumulated impairments		114,100,000		114,100,000		114,100,000
Accumulated divestiture related write-offs		85,900,000		85,900,000		85,900,000
Goodwill		0		0		$ 0
Purchase accounting gain		$ 0		$ 0	$ 0

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule Of Estimated Aggregate Amortization Expense for Intangible Assets (Details) $ in Thousands	Sep. 30, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2020	$ 14,921
2021	55,943
2022	51,498
2023	47,859
2024	44,040
2025	$ 37,145

Goodwill and Other Intangible_6

Goodwill and Other 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, 2020	Sep. 30, 2019
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 1,432,787	$ 1,432,787
Additions	77,644	0
Goodwill, Ending balance	1,510,431	1,432,787
Regional Banking
Goodwill [Roll Forward]
Goodwill, Beginning balance	1,289,819	1,289,819
Additions	77,644	0
Goodwill, Ending balance	1,367,463	1,289,819
Fixed Income
Goodwill [Roll Forward]
Goodwill, Beginning balance	142,968	142,968
Additions	0	0
Goodwill, Ending balance	$ 142,968	$ 142,968

Preferred Stock - Narrative (De

Preferred Stock - Narrative (Details) - USD ($) $ in Thousands	May 28, 2020	Sep. 30, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000
Liquidation Amount		$ 487,500
LIBOR | Beginning on or after August 1, 2025
Class of Stock [Line Items]
Basis spread on variable rate		4.262%
LIBOR | Beginning on or after May 1, 2026
Class of Stock [Line Items]
Basis spread on variable rate		4.92%
LIBOR | Beginning on or after May 1, 2024
Class of Stock [Line Items]
Basis spread on variable rate		3.859%
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		1,000
Preferred Stock, Shares Outstanding		1,000
Liquidation Amount		$ 100,000
Annual Dividend Rate		6.20%
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		8,625
Preferred Stock, Shares Outstanding		8,000
Liquidation Amount		$ 80,000
Annual Dividend Rate		6.625%
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		5,750
Preferred Stock, Shares Outstanding		5,750
Liquidation Amount		$ 57,500
Annual Dividend Rate		6.60%
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		10,000
Preferred Stock, Shares Outstanding		10,000
Liquidation Amount		$ 100,000
Annual Dividend Rate		6.10%
Series E Preferred Stock
Class of Stock [Line Items]
Sale of preferred stock, net	$ 145,000
Preferred stock, shares authorized (in shares)		1,725
Preferred Stock, Shares Outstanding		1,500
Liquidation Amount		$ 150,000
Annual Dividend Rate		6.50%

Preferred Stock - Non-Cumulativ

Preferred Stock - Non-Cumulative Perpetual Preferred Stock (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Liquidation Amount	$ 487,500
Carrying Amount, Issued	$ 470,370	$ 95,624
Series A Preferred Stock
Class of Stock [Line Items]
Annual Dividend Rate	6.20%
Liquidation Amount	$ 100,000
Carrying Amount, Issued	$ 95,624	95,624
Series B Preferred Stock
Class of Stock [Line Items]
Annual Dividend Rate	6.625%
Liquidation Amount	$ 80,000
Carrying Amount, Issued	$ 77,348	0
Series C Preferred Stock
Class of Stock [Line Items]
Annual Dividend Rate	6.60%
Liquidation Amount	$ 57,500
Carrying Amount, Issued	$ 59,084	0
Series D Preferred Stock
Class of Stock [Line Items]
Annual Dividend Rate	6.10%
Liquidation Amount	$ 100,000
Carrying Amount, Issued	$ 93,649	0
Series E Preferred Stock
Class of Stock [Line Items]
Annual Dividend Rate	6.50%
Liquidation Amount	$ 150,000
Carrying Amount, Issued	$ 144,665	$ 0

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, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 5,208,385	$ 5,055,580	$ 4,979,951	$ 4,926,081	$ 4,846,521	$ 4,784,369	$ 4,979,951	$ 4,784,369
Net unrealized gains (losses)	(7,067)			18,744			94,962	126,862
Amounts reclassified from AOCI	1,395			3,091			4,176	9,100
Other comprehensive income (loss)	(5,672)	1,366	103,444	21,835	58,662	55,465	99,138	135,962
Balance, end of period	8,144,142	5,208,385	5,055,580	4,996,043	4,926,081	4,846,521	8,144,142	4,996,043
Securities AFS
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	118,327		31,079	21,071		(75,736)	31,079	(75,736)
Net unrealized gains (losses)	(6,121)			16,889			81,127	113,495
Amounts reclassified from AOCI	1,003			0			1,003	201
Other comprehensive income (loss)	(5,118)			16,889			82,130	113,696
Balance, end of period	113,209	118,327		37,960	21,071		113,209	37,960
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	16,305		3,227	2,184		(12,112)	3,227	(12,112)
Net unrealized gains (losses)	(805)			1,855			13,998	13,367
Amounts reclassified from AOCI	(2,128)			989			(3,853)	3,773
Other comprehensive income (loss)	(2,933)			2,844			10,145	17,140
Balance, end of period	13,372	16,305		5,028	2,184		13,372	5,028
Pension and Post-retirement Plans
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(269,430)		(273,914)	(285,744)		(288,768)	(273,914)	(288,768)
Net unrealized gains (losses)	(141)			0			(163)	0
Amounts reclassified from AOCI	2,520			2,102			7,026	5,126
Other comprehensive income (loss)	2,379			2,102			6,863	5,126
Balance, end of period	(267,051)	(269,430)		(283,642)	(285,744)		(267,051)	(283,642)
Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(134,798)		$ (239,608)	(262,489)		$ (376,616)	(239,608)	(376,616)
Balance, end of period	$ (140,470)	$ (134,798)		$ (240,654)	$ (262,489)		$ (140,470)	$ (240,654)

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, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and fees on loans and leases	$ 557,195			$ 356,371			$ 1,189,707	$ 1,040,421
Provision (benefit) for income taxes	2,210			35,796			19,757	97,321
Amounts reclassified from AOCI	(539,038)	$ (56,665)	$ (16,472)	(113,943)	$ (113,742)	$ (103,405)	(612,175)	(331,090)
All other expense	68,131			61,238			160,971	150,720
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI	1,395			3,091			4,176	9,100
Reclassification out of Accumulated Other Comprehensive Income | Securities AFS
Accumulated Other Comprehensive Income (Loss) [Line Items]
Securities gains (losses), net	1,323			0			1,323	267
Provision (benefit) for income taxes	(320)			0			(320)	(66)
Amounts reclassified from AOCI	1,003			0			1,003	201
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and fees on loans and leases	(2,807)			1,313			(5,084)	5,012
Provision (benefit) for income taxes	679			(324)			1,231	(1,239)
Amounts reclassified from AOCI	(2,128)			989			(3,853)	3,773
Reclassification out of Accumulated Other Comprehensive Income | Pension and Post-retirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for income taxes	(805)			(690)			(2,244)	(1,683)
Amounts reclassified from AOCI	2,520			2,102			7,026	5,126
All other expense	$ 3,325			$ 2,792			$ 9,270	$ 6,809

Earnings Per Share - Schedule O

Earnings Per Share - Schedule Of Reconciliation Of Net Income/(Loss) to Net Income/(Loss) Available to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 539,038	$ 56,665	$ 16,472	$ 113,943	$ 113,742	$ 103,405	$ 612,175	$ 331,090
Net income attributable to noncontrolling interest	2,977			2,883			8,680	8,555
Net income attributable to controlling interest	536,061			111,060			603,495	322,535
Preferred stock dividends	12,722	$ 1,550	$ 1,550	1,550	$ 1,550	$ 1,550	15,822	4,650
Net income available to common shareholders	$ 523,339			$ 109,510			$ 587,673	$ 317,885
Weighted average common shares outstanding - basic (in shares)	549,690			311,888			391,699	314,442
Effect of dilutive securities (in shares)	1,156			1,917			1,014	1,959
Weighted average common shares outstanding - diluted (in shares)	550,846			313,805			392,713	316,401
Net income/(loss) per share available to common shareholders (in dollars per share)	$ 0.95			$ 0.35			$ 1.50	$ 1.01
Diluted income/(loss) per share available to common shareholders (in dollars per share)	$ 0.95			$ 0.35			$ 1.50	$ 1

Earnings Per Share - Schedule_2

Earnings Per Share - Schedule Of Anti-Dilutive Options and Awards (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
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)	$ 15.32	$ 21.21	$ 17.05	$ 21.36
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and other awards excluded from the calculation of diluted EPS (in shares)	8,306	1,883	4,564	2,413
Other Equity Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and other awards excluded from the calculation of diluted EPS (in shares)	6,824	2,094	4,826	1,815

Contingencies And Other Discl_2

Contingencies And Other Disclosures (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Estimated litigation liability	$ 1.3
Accrued losses on loan repurchase exposure	$ 15.9	$ 14.5

Pension, Savings, And Other E_3

Pension, Savings, And Other Employee Benefits - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions by employer remainder of year	$ 5.2
Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Employer investment in qualified defined contribution plan	100.00%
Maximum percent of employee pre-tax contributions that may be matched by the Company (percent)	6.00%
Qualified Plan | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated social security benefits age	65 years
Nonqualified Plan | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension plan contribution		$ 5.2

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8	$ 7	$ 24	$ 23
Interest cost	5,844	7,505	17,663	22,655
Expected return on plan assets	(7,000)	(9,335)	(19,337)	(27,681)
Prior service cost (credit)	0	0	0	0
Actuarial (gain) loss	3,381	2,546	9,829	7,416
Net periodic benefit cost (credit)	2,233	723	8,179	2,413
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	25	23	74	71
Interest cost	304	358	915	1,060
Expected return on plan assets	(325)	(314)	(947)	(852)
Prior service cost (credit)	8	0	24	0
Actuarial (gain) loss	(64)	(112)	(218)	(346)
Net periodic benefit cost (credit)	$ (52)	$ (45)	$ (152)	$ (67)

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, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)
Segment Reporting, Measurement Disclosures [Abstract]
Number of operating segments | segment							4
Segment Reporting Information [Line Items]
Net interest income	$ 532,365			$ 300,676			$ 1,140,511	$ 898,794
Provision for credit losses	227,000			14,366			502,388	36,273
Noninterest income	822,923			171,735			1,203,948	470,773
Noninterest expense	587,040			308,306			1,210,139	904,883
Income before income taxes	541,248			149,739			631,932	428,411
Provision for income taxes	2,210			35,796			19,757	97,321
Net income	539,038	$ 56,665	$ 16,472	113,943	$ 113,742	$ 103,405	612,175	331,090
Average assets	81,683,111			41,940,901			57,810,478	41,359,574
Regional Banking
Segment Reporting Information [Line Items]
Net interest income	583,907			302,467			1,233,654	885,932
Provision for credit losses	227,326			19,839			501,453	50,967
Noninterest income	172,457			85,930			333,669	240,555
Noninterest expense	373,680			193,956			768,870	586,697
Income before income taxes	155,358			174,602			297,000	488,823
Provision for income taxes	34,744			41,795			65,497	115,266
Net income	120,614			132,807			231,503	373,557
Average assets	64,371,210			31,632,768			44,170,906	30,231,372
Fixed Income
Segment Reporting Information [Line Items]
Net interest income	11,632			5,309			36,088	18,809
Noninterest income	110,783			77,808			319,741	197,238
Noninterest expense	67,395			67,582			231,488	173,656
Income before income taxes	55,020			15,535			124,341	42,391
Provision for income taxes	13,456			3,707			30,236	10,001
Net income	41,564			11,828			94,105	32,390
Average assets	3,002,282			2,882,478			3,341,255	2,952,925
Corporate
Segment Reporting Information [Line Items]
Net interest income	(69,187)			(13,252)			(145,847)	(28,136)
Noninterest income	539,668			7,359			548,891	30,112
Noninterest expense	142,894			42,297			199,461	139,052
Income before income taxes	327,587			(48,190)			203,583	(137,076)
Provision for income taxes	(46,785)			(11,632)			(77,690)	(36,416)
Net income	374,372			(36,558)			281,273	(100,660)
Average assets	13,595,544			6,434,633			9,527,471	7,098,500
Non-Strategic
Segment Reporting Information [Line Items]
Net interest income	6,013			6,152			16,616	22,189
Provision for credit losses	(326)			(5,473)			935	(14,694)
Noninterest income	15			638			1,647	2,868
Noninterest expense	3,071			4,471			10,320	5,478
Income before income taxes	3,283			7,792			7,008	34,273
Provision for income taxes	795			1,926			1,714	8,470
Net income	2,488			5,866			5,294	25,803
Average assets	$ 714,075			$ 991,022			$ 770,846	$ 1,076,777

Business Segment Information _2

Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Fixed income	$ 110,943	$ 77,645	$ 318,999	$ 197,808
Mortgage banking and title income	65,503	2,019	72,072	6,477
Deposit transactions and cash management	42,056	34,379	103,133	98,374
Brokerage, management fees and commissions	17,891	14,157	47,096	40,910
Trust services and investment management	11,741	7,163	26,669	22,077
Bankcard income	10,457	7,017	24,362	20,324
Securities gains (losses), net	(1,170)	97	(2,638)	177
Purchase accounting gain	532,150	0	532,150	0
Other income	33,352	29,258	82,105	84,626
Total noninterest income	822,923	171,735	1,203,948	470,773
Regional Banking
Disaggregation of Revenue [Line Items]
Fixed income	380	57	582	120
Mortgage banking and title income	65,569	1,643	71,168	5,119
Deposit transactions and cash management	40,500	32,624	98,906	93,316
Brokerage, management fees and commissions	19,595	14,157	48,799	40,910
Trust services and investment management	14,599	7,190	29,562	22,148
Bankcard income	10,150	7,030	23,853	20,670
Securities gains (losses), net	0	0	0	0
Purchase accounting gain	0		0	0
Other income	21,664	23,229	60,799	58,272
Total noninterest income	172,457	85,930	333,669	240,555
Fixed Income
Disaggregation of Revenue [Line Items]
Fixed income	110,563	77,588	318,417	196,582
Mortgage banking and title income	0	0	0	0
Deposit transactions and cash management	0	0	0	4
Brokerage, management fees and commissions	0	0	0	0
Trust services and investment management	0	0	0	0
Bankcard income	0	11	0	11
Securities gains (losses), net	0	0	0	0
Purchase accounting gain	0		0	0
Other income	220	209	1,324	641
Total noninterest income	110,783	77,808	319,741	197,238
Corporate
Disaggregation of Revenue [Line Items]
Fixed income	0	0	0	0
Mortgage banking and title income	23	0	23	0
Deposit transactions and cash management	1,528	1,721	4,131	4,956
Brokerage, management fees and commissions	(1,704)	0	(1,703)	0
Trust services and investment management	(2,858)	(27)	(2,893)	(71)
Bankcard income	277	63	421	185
Securities gains (losses), net	(1,170)	97	(2,638)	177
Purchase accounting gain	532,150		532,150	0
Other income	11,422	5,505	19,400	24,865
Total noninterest income	539,668	7,359	548,891	30,112
Non-Strategic
Disaggregation of Revenue [Line Items]
Fixed income	0	0	0	1,106
Mortgage banking and title income	(89)	376	881	1,358
Deposit transactions and cash management	28	34	96	98
Brokerage, management fees and commissions	0	0	0	0
Trust services and investment management	0	0	0	0
Bankcard income	30	(87)	88	(542)
Securities gains (losses), net	0	0	0	0
Purchase accounting gain	0		0	0
Other income	46	315	582	848
Total noninterest income	15	638	1,647	2,868
Underwriting, portfolio advisory, and other noninterest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 9,900	$ 9,200	$ 28,600	$ 23,600

Variable Interest Entities - Su

Variable Interest Entities - Summary Of VIE Consolidated By FHN (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Other assets	$ 4,135,056	$ 2,297,405
Total assets	83,029,579	43,310,900
Liabilities:
Other liabilities	1,695,868	990,094
Total liabilities	74,885,437	38,234,892
Rabbi Trusts Used for Deferred Compensation Plans
Assets
Other assets	154,783	91,873
Total assets	154,783	91,873
Liabilities:
Other liabilities	131,782	70,830
Total liabilities	$ 131,782	$ 70,830

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Low income housing tax credits
Variable Interest Entity [Line Items]
Amortization of qualifying LIHTC investments	$ 8,273	$ 4,436	$ 19,586	$ 12,721
Affordable Housing Tax Credits And Other Tax Benefits	(6,738)	(3,607)	(16,094)	(10,758)
Other tax benefits related to qualifying LIHTC investments
Variable Interest Entity [Line Items]
Affordable Housing Tax Credits And Other Tax Benefits	$ (3,034)	$ (1,751)	$ (8,172)	$ (4,970)

Variable Interest Entities - _3

Variable Interest Entities - Summary Of VIE Not Consolidated By FHN (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Total liabilities	$ 74,885,437	$ 38,234,892
Loans and leases (including $12,372 and $— at fair value, respectively)	59,706,531	31,061,111
Trading securities	1,386,069	1,346,207
Term borrowings	2,161,870	791,368
Securities available-for-sale	7,995,872	4,445,403
Low Income Housing Partnerships
Variable Interest Entity [Line Items]
Maximum Loss Exposure	338,558	237,668
Maximum loss exposure, contractual funding commitments	166,900	136,400
Low Income Housing Partnerships | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	166,931	136,404
Low Income Housing Partnerships | Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments	171,700	101,300
Other Tax Credit Investments
Variable Interest Entity [Line Items]
Maximum Loss Exposure	66,172	6,282
Other Tax Credit Investments | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	34,993	0
Small Issuer Trust Preferred Holdings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	209,442	238,397
Small Issuer Trust Preferred Holdings | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	0	0
On Balance Sheet Trust Preferred Securitization
Variable Interest Entity [Line Items]
Maximum Loss Exposure	32,031	33,265
Loans and leases (including $12,372 and $— at fair value, respectively)	112,500	112,500
Trading securities	1,700	1,700
Term borrowings	82,100	80,900
On Balance Sheet Trust Preferred Securitization | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	82,143	80,908
Proprietary & Agency Residential Mortgage Securitizations
Variable Interest Entity [Line Items]
Maximum Loss Exposure	471	941
Proprietary & Agency Residential Mortgage Securitizations | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	0	0
Holdings Of Agency Mortgage Backed Securities
Variable Interest Entity [Line Items]
Maximum Loss Exposure	7,386,169	4,537,685
Trading securities	900,000	500,000
Securities available-for-sale	6,500,000	4,000,000
Holdings Of Agency Mortgage Backed Securities | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	0	0
Commercial Loan Troubled Debt Restructurings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	177,949	45,169
Maximum loss exposure, contractual funding commitments	5,100	1,800
Loans and leases (including $12,372 and $— at fair value, respectively)	172,800	43,400
Commercial Loan Troubled Debt Restructurings | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	0	0
Sale Leaseback Transaction
Variable Interest Entity [Line Items]
Maximum Loss Exposure	17,993	18,111
Sale Leaseback Transaction | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	0	0
Proprietary Trust Preferred Issuances
Variable Interest Entity [Line Items]
Maximum Loss Exposure	0	0
Proprietary Trust Preferred Issuances | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total liabilities	$ 287,124	$ 167,014

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Thousands	Nov. 01, 2019	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash payables		$ 385,723					$ 385,723		$ 145,334
Total trading revenues		98,900		$ 63,600			277,500	$ 162,700
Cash flow hedge length of time						5 years
Hedged amount of foreign currency denominated loans		9,100					9,100		18,400
Derivative assets (Note 14)		834,480					834,480		182,984
Derivative liability		89,521					89,521		44,238
Cash Flow Hedge | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)						$ 250,000
Notional					$ 650,000
Derivative, expired during period			$ 200,000
Visa Class B Shares
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities related to sale		15,600					15,600		22,800
Additional Derivative Agreements | Derivative Instruments With Adjustable Collateral Posting Thresholds
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds		239,000					239,000		63,100
Net fair value of derivative liabilities with adjustable posting thresholds		3,600					3,600		6,400
Collateral received		349,600					349,600		148,500
Securities posted collateral		41,100					41,100		18,400
Additional Derivative Agreements | Derivative Instruments With Accelerated Termination Provisions
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds		239,000					239,000		63,100
Net fair value of derivative liabilities with adjustable posting thresholds		24,000					24,000		10,300
Collateral received		349,600					349,600		148,500
Securities posted collateral		62,800					$ 62,800		22,700
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, initial remaining term							11 months
Minimum | Cash Flow Hedge | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract					3 years
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, initial remaining term							34 months
Maximum | Cash Flow Hedge | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract					7 years
Counterparties
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash receivables		289,500					$ 289,500		136,600
Collateral cash payables		141,900					141,900		53,000
Senior Subordinated Notes | Senior Debt Maturing In December 2019
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings		400,000					400,000
Debt redeemed	$ 400,000
Senior Subordinated Notes | Senior Debt Maturing In December 2020
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings		500,000					500,000
Derivatives, interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash payables		369,510					369,510		143,334
Notional		800,000					800,000
Derivative assets (Note 14)		787,139					787,139		162,344
Derivative liability		47,047					47,047		24,431
Derivatives, interest rate contracts | Cash Flow Hedge | Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)		1,500,000					1,500,000		$ 900,000
Credit Risk Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset, notional amount		248,500					248,500
Derivative liability, notional amount		543,000					543,000
Derivative assets (Note 14)		342					342
Derivative liability		1,500					1,500
Embedded Derivative Financial Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets (Note 14)		1,300					1,300
Derivative liability		$ 1,300					$ 1,300

Derivatives - Derivatives Assoc

Derivatives - Derivatives Associated with Fixed Income Trading Activities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 3,847,085	$ 2,697,522
Assets	240,218	65,768
Liabilities	2,444	6,858
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	3,847,085	2,697,522
Assets	2,317	2,583
Liabilities	16,828	3,994
Option contracts purchased | Long
Derivative Instruments, Gain (Loss) [Line Items]
Notional		40,000
Assets		131
Liabilities		0
Forwards and futures purchased
Derivative Instruments, Gain (Loss) [Line Items]
Notional	15,069,709	9,217,350
Assets	41,553	17,029
Liabilities	3,456	3,187
Forwards and futures sold
Derivative Instruments, Gain (Loss) [Line Items]
Notional	15,596,324	9,403,112
Assets	5,788	3,611
Liabilities	$ 39,018	$ 16,620

Derivatives - Derivatives Ass_2

Derivatives - Derivatives Associated With Interest Rate Risk Management Activities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 3,847,085	$ 2,697,522
Assets	240,218	65,768
Liabilities	2,444	6,858
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	3,847,085	2,697,522
Assets	2,317	2,583
Liabilities	16,828	3,994
Customer Interest Rate Contracts Hedging | Hedging Instruments And Hedged Items | Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	6,667,600	3,044,067
Assets	487,005	90,394
Liabilities	303	3,515
Customer Interest Rate Contracts Hedging | Hedging Instruments And Hedged Items | Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	6,667,600	3,044,067
Assets	303	3,537
Liabilities	25,997	9,735
Debt Hedging | Hedging Instruments And Hedged Items | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Notional	500,000	500,000
Assets	13
Liabilities		69
Debt Hedging | Hedging Instruments And Hedged Items | Term Borrowings, Par
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	500,000	500,000
Debt Hedging | Hedging Instruments And Hedged Items | Term Borrowings, Cumulative Fair Value Hedging Adjustments
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	729	(1,604)
Debt Hedging | Hedging Instruments And Hedged Items | Term Borrowings, Unamortized Premium (Discount) and Issuance Costs
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	(74)	(740)
Debt Hedging | Hedging Instruments And Hedged Items | Term Borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Term borrowings	$ 500,655	$ 497,656

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Customer Interest Rate Contracts Hedging | Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to interest rate derivatives	$ (14,050)	$ 44,375	$ 197,346	$ 124,193
Customer Interest Rate Contracts Hedging | Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to interest rate derivatives	14,050	(44,375)	(197,346)	(124,193)
Debt Hedging | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to interest rate derivatives	(1,421)	1,994	2,776	12,969
Debt Hedging | Term Borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) related to term borrowings	$ 1,412	$ (2,004)	$ (2,333)	$ (12,876)

Derivatives - Derivatives Ass_3

Derivatives - Derivatives Associated With Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Mar. 31, 2017	Mar. 31, 2016
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 800,000	$ 800,000
Cash Flow Hedge | Hedging Instruments And Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Notional				$ 650,000
Variability in cash flows related to debt instruments (primarily loans)					$ 250,000
Cash Flow Hedge | Hedging Instruments And Hedged Items | Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)	1,500,000	1,500,000	$ 900,000
Cash Flow Hedge | Hedging Instruments And Hedged Items | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Notional	1,500,000	1,500,000	900,000
Assets	35,606	35,606
Liabilities			$ 241
Mortgage Banking Hedges | Hedging Instruments And Hedged Items | Interest Rate Lock
Derivative Instruments, Gain (Loss) [Line Items]
Notional	698,744	698,744
Assets	21,677	21,677
Liabilities	223	223
Gain (loss) on derivative instruments	7,434	7,434
Mortgage Banking Hedges | Hedging Instruments And Hedged Items | Forward Sales Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	753,660	753,660
Assets	859	859
Liabilities	2,577	2,577
Gain (loss) on derivative instruments	$ (9,633)	$ (9,633)

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) expected to be reclassified to earnings in the next twelve months			$ 26,500
Hedging Instruments And Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), cash flow hedges	$ (805)	$ 1,855	13,998	$ 13,367
Gain (loss) reclassified from AOCI into Interest income	(2,128)	989	(3,853)	3,773
Hedging Instruments And Hedged Items | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), cash flow hedges	$ (7,799)	$ 3,840	$ 9,644	$ 22,954

Derivatives - Derivative Assets

Derivatives - Derivative Assets and Collateral Received (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Gross amounts of recognized assets	$ 834,480	$ 182,984
Derivative liabilities available for offset	0	0
Net amount	834,480	182,984
Derivative liabilities available for offset	(27,506)	(18,896)
Collateral received	(385,723)	(145,334)
Net amount	421,251	18,754
Derivative assets not subject to master netting agreements	2,600	100
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized assets	787,139	162,344
Derivative liabilities available for offset	0	0
Net amount	787,139	162,344
Derivative liabilities available for offset	(11,401)	(5,604)
Collateral received	(369,510)	(143,334)
Net amount	406,228	13,406
Forward Contracts
Derivative [Line Items]
Gross amounts of recognized assets	47,341	20,640
Derivative liabilities available for offset	0	0
Net amount	47,341	20,640
Derivative liabilities available for offset	(16,105)	(13,292)
Collateral received	(16,213)	(2,000)
Net amount	$ 15,023	$ 5,348

Derivatives - Derivative Liabil

Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 89,521	$ 44,238
Derivative assets available for offset	0	0
Derivative liability	89,521	44,238
Derivative assets available for offset	(27,506)	(18,896)
Collateral pledged	(57,198)	(25,204)
Net amount	4,817	138
Derivative liabilities not subject to master netting agreements	19,900	23,200
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	47,047	24,431
Derivative assets available for offset	0	0
Derivative liability	47,047	24,431
Derivative assets available for offset	(11,401)	(5,604)
Collateral pledged	(30,829)	(18,689)
Net amount	4,817	138
Forward Contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	42,474	19,807
Derivative assets available for offset	0	0
Derivative liability	42,474	19,807
Derivative assets available for offset	(16,105)	(13,292)
Collateral pledged	(26,369)	(6,515)
Net amount	$ 0	$ 0

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, 2020	Dec. 31, 2019
Securities Purchased under Agreements to Resell [Abstract]
Gross amounts of recognized assets	$ 591,987	$ 586,629
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	591,987	586,629
Offsetting securities sold under agreements to repurchase	(70)	(21,004)
Securities collateral (not recognized on FHN’s Balance Sheets)	(590,123)	(562,702)
Net amount	$ 1,794	$ 2,923

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, 2020	Dec. 31, 2019
Securities Sold under Agreements to Repurchase [Abstract]
Gross amounts of recognized liabilities	$ 1,158,994	$ 716,925
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	1,158,994	716,925
Offsetting securities purchased under agreements to resell	(70)	(21,004)
Securities/ government guaranteed loans collateral	(1,158,791)	(695,879)
Net amount	$ 133	$ 42

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, 2020	Dec. 31, 2019
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	$ 1,158,994	$ 716,925
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	1,149,700	712,380
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	9,294	4,545
U.S. treasuries
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	363,674	41,364
U.S. treasuries | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	363,674	41,364
U.S. treasuries | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
Government agency issued MBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	585,166	345,718
Government agency issued MBS | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	578,284	341,173
Government agency issued MBS | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	6,882	4,545
Government agency issued CMO
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	6,941
Government agency issued CMO | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	4,529
Government agency issued CMO | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	2,412
Other U.S. government agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	82,576	54,924
Other U.S. government agencies | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	82,576	54,924
Other U.S. government agencies | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
Government guaranteed loans (SBA and USDA)
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	120,637	274,919
Government guaranteed loans (SBA and USDA) | Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	120,637	274,919
Government guaranteed loans (SBA and USDA) | Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	$ 0	$ 0

Fair Value of Assets & 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, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	$ 1,386,069	$ 1,346,207
Loans held-for-sale	371,831	14,033
Loans held for investment	12,372	0
Securities available-for-sale	7,995,872	4,445,403
Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	371,831	14,033
Loans held for investment	12,372
Securities available-for-sale	7,995,872	4,445,403
Total other assets	971,736	252,573
Total assets	10,737,880	6,058,216
Total other liabilities	109,448	67,480
Total liabilities	586,521	573,061
Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	0	0
Loans held for investment	0
Securities available-for-sale	0	0
Total other assets	182,819	90,098
Total assets	182,819	90,098
Total other liabilities	45,051	19,807
Total liabilities	45,051	19,807
Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	359,396	0
Loans held for investment	0
Securities available-for-sale	7,962,913	4,426,267
Total other assets	788,575	162,475
Total assets	10,496,482	5,934,008
Total other liabilities	47,257	24,878
Total liabilities	524,330	530,459
Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	12,435	14,033
Loans held for investment	12,372
Securities available-for-sale	32,959	19,136
Total other assets	342	0
Total assets	58,579	34,110
Total other liabilities	17,140	22,795
Total liabilities	17,140	22,795
Deferred compensation mutual funds | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	109,907	46,815
Deferred compensation mutual funds | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	109,907	46,815
Deferred compensation mutual funds | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Deferred compensation mutual funds | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Derivatives, forwards and futures | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	48,200	20,640
Total other liabilities	45,051	19,807
Derivatives, forwards and futures | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	48,200	20,640
Total other liabilities	45,051	19,807
Derivatives, forwards and futures | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, forwards and futures | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, interest rate contracts | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	787,139	162,413
Total other liabilities	45,795	24,412
Derivatives, interest rate contracts | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, interest rate contracts | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	787,139	162,413
Total other liabilities	45,795	24,412
Derivatives, interest rate contracts | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, other | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	1,778	62
Total other liabilities	18,602	23,261
Derivatives, other | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, other | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	1,436	62
Total other liabilities	1,462	466
Derivatives, other | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	342	0
Total other liabilities	17,140	22,795
U.S. treasuries | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	300,034	100
U.S. treasuries | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
U.S. treasuries | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	300,034	100
U.S. treasuries | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Government agency issued MBS | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	3,827,066	2,348,517
Government agency issued MBS | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Government agency issued MBS | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	3,827,066	2,348,517
Government agency issued MBS | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Government agency issued CMO | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	2,705,447	1,670,492
Government agency issued CMO | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Government agency issued CMO | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	2,705,447	1,670,492
Government agency issued CMO | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Other U.S. government agencies | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	658,266	306,092
Other U.S. government agencies | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Other U.S. government agencies | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	658,266	306,092
Other U.S. government agencies | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
States and municipalities | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	432,090	60,526
States and municipalities | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
States and municipalities | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	432,090	60,526
States and municipalities | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Corporates and other debt | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	40,010	40,540
Corporates and other debt | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Corporates and other debt | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	40,010	40,540
Corporates and other debt | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Equity, mutual funds, and other | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	24,712	22,643
Equity, mutual funds, and other | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	24,712	22,643
Equity, mutual funds, and other | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Equity, mutual funds, and other | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Interest- only strips- AFS | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	32,959	19,136
Interest- only strips- AFS | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Interest- only strips- AFS | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	0	0
Interest- only strips- AFS | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available-for-sale	32,959	19,136
Fixed Income | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,385,598	1,345,266
Total trading liabilities - fixed income	477,073	505,581
Fixed Income | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,385,598	1,345,266
Total trading liabilities - fixed income	477,073	505,581
Fixed Income | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | U.S. treasuries | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	98,743	134,844
Total trading liabilities - fixed income	431,565	406,380
Fixed Income | U.S. treasuries | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | U.S. treasuries | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	98,743	134,844
Total trading liabilities - fixed income	431,565	406,380
Fixed Income | U.S. treasuries | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Government agency issued MBS | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	352,564	268,024
Total trading liabilities - fixed income		33
Fixed Income | Government agency issued MBS | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income		0
Fixed Income | Government agency issued MBS | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	352,564	268,024
Total trading liabilities - fixed income		33
Fixed Income | Government agency issued MBS | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income		0
Fixed Income | Government agency issued CMO | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	501,091	250,652
Fixed Income | Government agency issued CMO | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Fixed Income | Government agency issued CMO | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	501,091	250,652
Fixed Income | Government agency issued CMO | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Fixed Income | Other U.S. government agencies | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	261,569	124,972
Total trading liabilities - fixed income		88
Fixed Income | Other U.S. government agencies | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income		0
Fixed Income | Other U.S. government agencies | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	261,569	124,972
Total trading liabilities - fixed income		88
Fixed Income | Other U.S. government agencies | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income		0
Fixed Income | States and municipalities | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	13,087	120,744
Total trading liabilities - fixed income	203
Fixed Income | States and municipalities | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0
Fixed Income | States and municipalities | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	13,087	120,744
Total trading liabilities - fixed income	203
Fixed Income | States and municipalities | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0
Fixed Income | Corporates and other debt | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	158,544	445,253
Total trading liabilities - fixed income	45,298	99,080
Fixed Income | Corporates and other debt | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Corporates and other debt | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	158,544	445,253
Total trading liabilities - fixed income	45,298	99,080
Fixed Income | Corporates and other debt | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities - fixed income	0	0
Fixed Income | Equity, mutual funds, and other | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities		777
Total trading liabilities - fixed income	7
Fixed Income | Equity, mutual funds, and other | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities		0
Total trading liabilities - fixed income	0
Fixed Income | Equity, mutual funds, and other | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities		777
Total trading liabilities - fixed income	7
Fixed Income | Equity, mutual funds, and other | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities		0
Total trading liabilities - fixed income	0
Mortgage Banking | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	471	941
Mortgage Banking | Level 1 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Mortgage Banking | Level 2 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Mortgage Banking | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	$ 471	$ 941

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Acquired	$ 0		$ 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	(18,645)	$ (26,545)	(22,795)	$ (31,540)
Net income	(599)	(4,008)	(1,311)	(3,892)
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	2,446	2,468	7,308	7,347
Net transfers into (out of) Level 3	0	0	0	0
Ending balance	(16,798)	(28,085)	(16,798)	(28,085)
Net unrealized gains (losses) included in net income	(76)	(4,008)	(788)	(3,892)
Trading securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	628	1,255	941	1,524
Acquired	0		0
Net income	(157)	(157)	(470)	(128)
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	(298)
Net transfers into (out of) Level 3	0	0	0	0
Ending balance	471	1,098	471	1,098
Net unrealized gains (losses) included in net income	0	0	0	(66)
Interest- only strips- AFS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	25,446	17,792	19,136	9,902
Acquired	0		0
Net income	(1,282)	(1,421)	(3,810)	(2,820)
Purchases	0	0	5,481	86
Sales	(56)	(11,401)	(8,759)	(38,612)
Settlements	0	0	0	0
Net transfers into (out of) Level 3	8,851	10,279	20,911	46,693
Ending balance	32,959	15,249	32,959	15,249
Net unrealized gains (losses) included in net income	1,192	(1,977)	2,994	(1,250)
Loans held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	13,263	15,092	14,033	16,273
Acquired	0		0
Net income	(80)	443	671	1,259
Purchases	0	0	0	10
Sales	0	0	0	0
Settlements	(748)	(1,126)	(2,269)	(3,133)
Net transfers into (out of) Level 3	0	0	0	0
Ending balance	12,435	14,409	12,435	14,409
Net unrealized gains (losses) included in net income	(80)	$ 443	671	$ 1,259
Loans held for investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0		0
Acquired	13,746		13,746
Net income	(418)		(418)
Purchases	0		0
Sales	(2,927)		(2,927)
Settlements	(2,312)		(2,312)
Net transfers into (out of) Level 3	4,283		4,283
Ending balance	12,372		12,372
Net unrealized gains (losses) included in net income	$ 367		$ 367

Fair Value of Assets & Liabil_5

Fair Value of Assets & Liabilities - Nonrecurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 371,831	$ 14,033
Loans and leases (including $12,372 and $— at fair value, respectively)	59,706,531	31,061,111
Non Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	114,583	42,208
OREO	17,767	15,660
Other assets	9,490	10,608
Non Recurring | Small Business Administration And USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	595,228	493,524
Non Recurring | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	529	516
Non Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	0	0
OREO	0	0
Other assets	0	0
Non Recurring | Level 1 | Small Business Administration And USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Non Recurring | Level 1 | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Non Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	0	0
OREO	0	0
Other assets	0	0
Non Recurring | Level 2 | Small Business Administration And USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	594,485	492,595
Non Recurring | Level 2 | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Non Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases (including $12,372 and $— at fair value, respectively)	114,583	42,208
OREO	17,767	15,660
Other assets	9,490	10,608
Non Recurring | Level 3 | Small Business Administration And USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	743	929
Non Recurring | Level 3 | First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 529	$ 516

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), Loans, net of unearned income	$ (17,444)	$ (15,559)	$ (31,040)	$ (16,036)
Net gains/(losses), Real estate acquired by foreclosure	(34)	(282)	(203)	(256)
Net gains/(losses), Other assets	(346)	(407)	(1,118)	(1,349)
Gain (loss) on financial assets measured on non-recurring basis	(19,353)	(17,223)	(34,633)	(18,822)
First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), Loans held for sale	31	2	32	27
SBAs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), Loans held for sale	$ (1,560)	$ (977)	$ (2,304)	$ (1,208)

Fair Value of Assets & Liabil_7

Fair Value of Assets & Liabilities - Narrative (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Fair value, asset (liability), unrealized gain (loss), OCI	$ 0	$ 0
Corporate
Segment Reporting Information [Line Items]
Fixed asset impairments	4,800,000
Disposition of Acquired Properties | Corporate
Segment Reporting Information [Line Items]
Asset impairment charges		4,600,000
Reversed asset impairment charges		700,000
Disposition of Acquired Properties | 2019 Business Optimization | Corporate
Segment Reporting Information [Line Items]
Asset impairment charges	$ 4,200,000	1,500,000
Leased Assets | 2019 Business Optimization | Corporate
Segment Reporting Information [Line Items]
Asset impairment charges		14,000,000
Reversed asset impairment charges		1,400,000
Leased Assets | Rebranding Initiative | Corporate
Segment Reporting Information [Line Items]
Asset impairment charges		$ 7,100,000

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	Sep. 30, 2020USD ($)month	Dec. 31, 2019USD ($)month
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 7,995,872	$ 4,445,403
Loans held-for-sale	371,831	14,033
Derivative liability	89,521	44,238
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	16,798	22,795
Loans net of unearned income	114,583	42,208
OREO, fair value	17,767	15,660
Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	743	929
Loans held for investment	12,372
Other Assets | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets	$ 9,490	$ 10,608
Constant prepayment rate | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	11
Constant prepayment rate | Weighted Average | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.10	0.10
Constant prepayment rate | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	0.24
Constant prepayment rate | Minimum | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.08
Constant prepayment rate | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	0
Constant prepayment rate | Maximum | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.12
Bond equivalent yield | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		0.09
Bond equivalent yield | Weighted Average | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.07	0.09
Prepayment Speeds | Minimum | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		8
Prepayment Speeds | Maximum | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		12
Foreclosure losses | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.63	0.64
Foreclosure losses | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.50	50
Foreclosure losses | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.65	66
Loss severity | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	1
Loss severity | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	0
Loss severity | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	1
Visa covered litigation resolution amount | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input, value	$ 5,800,000	$ 5,800,000
Visa covered litigation resolution amount | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input, value	5,400,000	5,400,000
Visa covered litigation resolution amount | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input, value	$ 6,000,000	$ 6,000,000
Probability of resolution scenarios | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.16	0.16
Probability of resolution scenarios | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.10	10
Probability of resolution scenarios | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input	0.50	50
Time until resolution | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input | month	21	29
Time until resolution | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input | month	6	15
Time until resolution | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, measurement input | month	30	39
Marketability adjustments for specific properties | Minimum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0	0
Other assets, measurement input	0	0
Marketability adjustments for specific properties | Maximum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.10	10
Other assets, measurement input	0.25	25
Borrowing base certificates adjustment | Minimum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.20	20
Borrowing base certificates adjustment | Maximum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.50	50
Financial Statements/Auction values adjustment | Minimum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0	0
Financial Statements/Auction values adjustment | Maximum | Other collateral valuations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans net of unearned income, measurement input	0.25	25
Adjustment for value changes since appraisal | Minimum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO measurement input	0	0
Adjustment for value changes since appraisal | Maximum | Appraisals from comparable properties | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO measurement input	0.10	10
Adjustments to current sales yields for specific properties | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0	0
Adjustments to current sales yields for specific properties | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0.15	15
Constant default rate | Weighted Average | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	1
Constant default rate | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	0
Constant default rate | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment, measurement input	0.15
Residential Real Estate | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 12,964	$ 14,549
First Mortgages | Prepayment Speeds | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.054	0.041
First Mortgages | Prepayment Speeds | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.05	3
First Mortgages | Prepayment Speeds | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.15	14
First Mortgages | Loss severity | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.133	0.143
First Mortgages | Loss severity | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.03	3
First Mortgages | Loss severity | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.19	24
HELOC | Prepayment Speeds | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		0.076
HELOC | Prepayment Speeds | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		0
HELOC | Prepayment Speeds | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		12
HELOC | Loss severity | Weighted Average | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		0.50
HELOC | Loss severity | Minimum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		0
HELOC | Loss severity | Maximum | Discounted cash flow | Loans Held For Sale, Residential Real Estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input		72
Interest- only strips- AFS | Available-for-sale Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 32,959	$ 19,136
Interest- only strips- AFS | Constant prepayment rate | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12	0.12
Interest- only strips- AFS | Constant prepayment rate | Weighted Average | Discounted cash flow | Available-for-sale Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12	0.12
Interest- only strips- AFS | Bond equivalent yield | Weighted Average | Discounted cash flow | Available-for-sale Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.15	0.16
Interest- only strips- AFS | Bond equivalent yield | Minimum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.14	0.16
Interest- only strips- AFS | Bond equivalent yield | Maximum | Discounted cash flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.16	0.17
Non Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets	$ 9,490	$ 10,608
Non Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets	$ 9,490	$ 10,608
SBAs | Non Recurring | Bond equivalent yield | Discounted cash flow | Loans Held For Sale - SBA | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.07

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, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	$ 371,831	$ 14,033
Loans held for investment	12,372	0
Fair value carrying amount less aggregate unpaid principal - Total loans	(690)
Nonaccrual loans	643
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(247)
Held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	371,831	14,033
Fair value carrying amount less aggregate unpaid principal - Total loans	9,966	(5,245)
Nonaccrual loans	2,972	3,532
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(3,101)	(3,114)
Loans 90 days or more past due and still accruing	287	163
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing	(132)	(105)
Aggregate unpaid principal
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held for investment	13,062
Nonaccrual loans	890
Aggregate unpaid principal | Held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	361,865	19,278
Nonaccrual loans	6,073	6,646
Loans 90 days or more past due and still accruing	$ 419	$ 268

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) - Mortgage Banking Noninterest Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
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	$ 1,867	$ 443	$ 2,618	$ 1,259
Loans held for investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ (418)	$ 0	$ (418)	$ 0

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, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	$ 58,718,429	$ 30,860,804
Short-term financial assets:
Interest-bearing deposits with banks	5,443,292	482,405
Securities purchased under agreements to resell	591,987	586,629
Trading securities	1,386,069	1,346,207
Loans held for sale	1,050,504	593,790
Securities available-for-sale	7,995,872	4,445,403
Derivative Asset, Fair Value, Gross Asset	834,480	182,984
Other assets:
Total assets	83,029,579	43,310,900
Liabilities:
Trading Liabilities	477,073	505,581
Short-term financial liabilities:
Securities sold under agreements to repurchase	1,158,994	716,925
Term borrowings:
Other long term borrowings	2,161,870	791,368
Gross amounts of recognized liabilities	89,521	44,238
Total liabilities	74,885,437	38,234,892
Fair Value, Inputs, Level 3 | FHLB-Cincinnati Stock
Term borrowings:
Restricted investments	85,600	76,000
Fair Value, Inputs, Level 3 | FRB Stock
Term borrowings:
Restricted investments	205,600	130,700
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	58,718,429	30,860,804
Short-term financial assets:
Interest-bearing deposits with banks	5,443,292	482,405
Federal funds sold and securities purchased under agreements to resell	1,480	46,536
Securities purchased under agreements to resell	591,987	586,629
Total short-term financial assets	6,036,759	1,115,570
Trading securities	1,386,069	1,346,207
Loans held for sale	1,050,504	593,790
Securities available-for-sale	7,995,872	4,445,403
Securities held-to-maturity		10,000
Derivative Asset, Fair Value, Gross Asset	837,117	183,115
Other assets:
Tax credit investments	407,480	247,075
Deferred compensation assets	109,907	46,815
Equity, mutual funds, and other	315,828	229,352
Total other assets	833,215	523,242
Total assets	76,867,965	39,078,131
Liabilities:
Defined maturity	5,525,913	3,618,337
Trading Liabilities	477,073	505,581
Short-term financial liabilities:
Federal funds purchased	840,847	548,344
Securities sold under agreements to repurchase	1,158,994	716,925
Other short-term borrowings	141,878	2,253,045
Short Term Financial Liabilities	2,141,719	3,518,314
Term borrowings:
Real estate investment trust-preferred	46,287	46,236
Term borrowings—new market tax credit investment	37,881
Secured Borrowings	15,314	21,975
Junior subordinated debentures	237,475	144,593
Other long term borrowings	1,824,913	578,564
Total term borrowings	2,161,870	791,368
Gross amounts of recognized liabilities	109,448	67,480
Total liabilities	10,416,023	8,501,080
Reported Value Measurement | Commercial and industrial (a)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	33,166,623	19,928,605
Reported Value Measurement | Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	12,302,929	4,300,905
Reported Value Measurement | Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	12,062,439	6,148,696
Reported Value Measurement | Credit Card and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	1,186,438	482,598
Reported Value Measurement | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale	371,831	14,033
Reported Value Measurement | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held for sale	595,228	493,525
Reported Value Measurement | Other consumer loans- LOCOM
Short-term financial assets:
Loans held for sale	4,569	5,197
Reported Value Measurement | Mortgage loans- LOCOM
Short-term financial assets:
Loans held for sale	78,876	81,035
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	59,136,950	31,218,152
Short-term financial assets:
Interest-bearing deposits with banks	5,443,292	482,405
Federal funds sold and securities purchased under agreements to resell	1,480	46,536
Securities purchased under agreements to resell	591,987	586,629
Total short-term financial assets	6,036,759	1,115,570
Trading securities	1,386,069	1,346,207
Loans held for sale	1,055,553	596,535
Securities available-for-sale	7,995,872	4,445,403
Securities held-to-maturity		10,001
Derivative Asset, Fair Value, Gross Asset	837,117	183,115
Other assets:
Tax credit investments	386,901	244,755
Deferred compensation assets	109,907	46,815
Equity, mutual funds, and other	315,828	229,352
Total other assets	812,636	520,922
Total assets	77,270,933	39,435,905
Liabilities:
Defined maturity	5,602,997	3,631,090
Trading Liabilities	477,073	505,581
Short-term financial liabilities:
Federal funds purchased	840,847	548,344
Securities sold under agreements to repurchase	1,158,994	716,925
Other short-term borrowings	141,878	2,253,045
Short Term Financial Liabilities	2,141,719	3,518,314
Term borrowings:
Real estate investment trust-preferred	47,000	47,000
Term borrowings—new market tax credit investment	37,993
Secured Borrowings	15,314	21,975
Junior subordinated debentures	229,699	142,375
Other long term borrowings	1,929,827	574,287
Total term borrowings	2,259,833	785,637
Gross amounts of recognized liabilities	109,448	67,480
Total liabilities	10,591,070	8,508,102
Loan commitments	1,823	3,656
Standby and other commitments	6,119	5,513
Estimate of Fair Value Measurement | Commercial and industrial (a)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	33,295,053	20,096,397
Estimate of Fair Value Measurement | Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	12,304,261	4,300,489
Estimate of Fair Value Measurement | Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	12,327,350	6,334,187
Estimate of Fair Value Measurement | Credit Card and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	1,210,286	487,079
Estimate of Fair Value Measurement | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale	371,831	14,033
Estimate of Fair Value Measurement | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held for sale	600,277	496,270
Estimate of Fair Value Measurement | Other consumer loans- LOCOM
Short-term financial assets:
Loans held for sale	4,569	5,197
Estimate of Fair Value Measurement | Mortgage loans- LOCOM
Short-term financial assets:
Loans held for sale	78,876	81,035
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Short-term financial assets:
Interest-bearing deposits with banks	5,443,292	482,405
Federal funds sold and securities purchased under agreements to resell	0	0
Securities purchased under agreements to resell	0	0
Total short-term financial assets	5,443,292	482,405
Trading securities	0	0
Loans held for sale	0	0
Securities available-for-sale	0	0
Securities held-to-maturity		0
Derivative Asset, Fair Value, Gross Asset	48,200	20,640
Other assets:
Tax credit investments	0	0
Deferred compensation assets	109,907	46,815
Equity, mutual funds, and other	24,712	22,643
Total other assets	134,619	69,458
Total assets	5,626,111	572,503
Liabilities:
Defined maturity	0	0
Trading Liabilities	0	0
Short-term financial liabilities:
Federal funds purchased	0	0
Securities sold under agreements to repurchase	0	0
Other short-term borrowings	0	0
Short Term Financial Liabilities	0	0
Term borrowings:
Real estate investment trust-preferred	0	0
Term borrowings—new market tax credit investment	0
Secured Borrowings	0	0
Junior subordinated debentures	0	0
Other long term borrowings	0	0
Total term borrowings	0	0
Gross amounts of recognized liabilities	45,051	19,807
Total liabilities	45,051	19,807
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Commercial and industrial (a)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Credit Card and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held for sale	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Other consumer loans- LOCOM
Short-term financial assets:
Loans held for sale	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Mortgage loans- LOCOM
Short-term financial assets:
Loans held for sale	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Short-term financial assets:
Interest-bearing deposits with banks	0	0
Federal funds sold and securities purchased under agreements to resell	1,480	46,536
Securities purchased under agreements to resell	591,987	586,629
Total short-term financial assets	593,467	633,165
Trading securities	1,385,598	1,345,266
Loans held for sale	963,466	500,520
Securities available-for-sale	7,962,913	4,426,267
Securities held-to-maturity		0
Derivative Asset, Fair Value, Gross Asset	788,575	162,475
Other assets:
Tax credit investments	0	0
Deferred compensation assets	0	0
Equity, mutual funds, and other	0	0
Total other assets	0	0
Total assets	11,694,019	7,067,693
Liabilities:
Defined maturity	5,602,997	3,631,090
Trading Liabilities	477,073	505,581
Short-term financial liabilities:
Federal funds purchased	840,847	548,344
Securities sold under agreements to repurchase	1,158,994	716,925
Other short-term borrowings	141,878	2,253,045
Short Term Financial Liabilities	2,141,719	3,518,314
Term borrowings:
Real estate investment trust-preferred	0	0
Term borrowings—new market tax credit investment	0
Secured Borrowings	0	0
Junior subordinated debentures	0	0
Other long term borrowings	1,929,827	574,287
Total term borrowings	1,929,827	574,287
Gross amounts of recognized liabilities	47,257	24,878
Total liabilities	10,198,873	8,254,150
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Commercial and industrial (a)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Credit Card and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale	359,396	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held for sale	599,501	495,323
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Other consumer loans- LOCOM
Short-term financial assets:
Loans held for sale	4,569	5,197
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Mortgage loans- LOCOM
Short-term financial assets:
Loans held for sale	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	59,136,950	31,218,152
Short-term financial assets:
Interest-bearing deposits with banks	0	0
Federal funds sold and securities purchased under agreements to resell	0	0
Securities purchased under agreements to resell	0	0
Total short-term financial assets	0	0
Trading securities	471	941
Loans held for sale	92,087	96,015
Securities available-for-sale	32,959	19,136
Securities held-to-maturity		10,001
Derivative Asset, Fair Value, Gross Asset	342	0
Other assets:
Tax credit investments	386,901	244,755
Deferred compensation assets	0	0
Equity, mutual funds, and other	291,116	206,709
Total other assets	678,017	451,464
Total assets	59,950,803	31,795,709
Liabilities:
Defined maturity	0	0
Trading Liabilities	0	0
Short-term financial liabilities:
Federal funds purchased	0	0
Securities sold under agreements to repurchase	0	0
Other short-term borrowings	0	0
Short Term Financial Liabilities	0	0
Term borrowings:
Real estate investment trust-preferred	47,000	47,000
Term borrowings—new market tax credit investment	37,993
Secured Borrowings	15,314	21,975
Junior subordinated debentures	229,699	142,375
Other long term borrowings	0	0
Total term borrowings	330,006	211,350
Gross amounts of recognized liabilities	17,140	22,795
Total liabilities	347,146	234,145
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Commercial and industrial (a)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	33,295,053	20,096,397
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	12,304,261	4,300,489
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	12,327,350	6,334,187
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Credit Card and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of unearned income and allowance for loan losses	1,210,286	487,079
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale	12,435	14,033
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Government guaranteed loans (SBA and USDA)
Short-term financial assets:
Loans held for sale	776	947
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Other consumer loans- LOCOM
Short-term financial assets:
Loans held for sale	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Mortgage loans- LOCOM
Short-term financial assets:
Loans held for sale	78,876	81,035
Contractual Amount
Term borrowings:
Loan commitments	20,627,190	12,355,220
Standby and other commitments	$ 742,278	$ 459,268

Restructuring, Repositioning,_3

Restructuring, Repositioning, and Efficiency (Details) - 2019 Business Optimization - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges	$ (81)	$ 7,842	$ (78)	$ 38,662
Personnel expense
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges	0	1,182	89	10,244
Legal and professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges	2	6,488	16	15,025
Net occupancy expense
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges	0	(128)	2	761
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges	$ (83)	$ 300	$ (185)	$ 12,632