Bbva Usa Bancshares 10-Q 4 May 21 2021 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2021	Apr. 26, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Document Transition Report	false
Entity File Number	000-55106
Entity Registrant Name	BBVA USA Bancshares, Inc.
Entity Central Index Key	0001409775
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	20-8948381
Entity Address, Address Line One	2200 Post Oak Blvd.
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	205
Local Phone Number	297-3000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		222,963,891

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Cash and due from banks	$ 1,044,788	$ 1,249,954
Federal funds sold, securities purchased under agreements to resell and interest bearing deposits	14,097,936	13,357,954
Cash and cash equivalents	15,142,724	14,607,908
Trading account assets	561,187	762,449
Debt securities available for sale	5,408,087	5,744,919
Debt securities held to maturity, net of allowance for debt securities held to maturity losses of $1,969 and $2,178 at March 31, 2021 and December 31, 2020, respectively (fair value of $12,497,012 and $10,809,461 at March 31, 2021 and December 31, 2020, respectively)	12,339,994	10,549,945
Loans held for sale, at fair value	295,570	236,586
Loans	63,960,242	65,559,767
Allowance for loan losses	(1,498,909)	(1,679,474)
Net loans	62,461,333	63,880,293
Premises and equipment, net	1,028,385	1,055,525
Bank owned life insurance	759,219	757,943
Goodwill	2,328,296	2,328,296
Other assets	3,658,603	2,832,339
Total assets	103,983,398	102,756,203
Deposits:
Noninterest bearing	29,543,118	27,791,421
Interest bearing	56,427,836	58,066,960
Total deposits	85,970,954	85,858,381
FHLB and other borrowings	3,517,567	3,548,492
Federal funds purchased and securities sold under agreements to repurchase	966,336	184,478
Accrued expenses and other liabilities	1,509,486	1,473,490
Total liabilities	91,964,343	91,064,841
Shareholder’s Equity:
Series A Preferred stock, $.0.01 par value, liquidation preference $200,000 per share, authorized — 30,000,000 shares, issued — 1,150 at both March 31, 2021 and December 31, 2020	229,475	229,475
Common stock — $0.01 par value; authorized — 300,000,000 shares, issued — 222,963,891 shares at both March 31, 2021 and December 31, 2020	2,230	2,230
Surplus	14,039,261	14,032,205
Accumulated deficit	(2,546,271)	(2,931,151)
Accumulated other comprehensive income	264,206	329,105
Total BBVA USA Bancshares, Inc. shareholder’s equity	11,988,901	11,661,864
Noncontrolling interests	30,154	29,498
Total shareholder’s equity	12,019,055	11,691,362
Total liabilities and shareholder’s equity	$ 103,983,398	$ 102,756,203

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for debt securities held to maturity losses	$ 1,969	$ 2,178
Held-to-maturity securities, fair value	$ 12,497,012	$ 10,809,461
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 200,000	$ 200,000
Preferred stock, shares authorized (in shares)	30,000,000	30,000,000
Preferred stock, shares issued (in shares)	1,150	1,150
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	222,963,891	222,963,891

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income:
Interest and fees on loans	$ 606,407	$ 715,476
Interest on debt securities available for sale	24,437	(1,492)
Interest on debt securities held to maturity	63,060	41,102
Interest on trading account assets	1,021	1,122
Interest and dividends on other earning assets	5,169	42,175
Total interest income	700,094	798,383
Interest expense:
Interest on deposits	20,345	164,742
Interest on FHLB and other borrowings	14,516	21,176
Interest on federal funds purchased and securities sold under agreements to repurchase	576	22,658
Interest on other short-term borrowings	389	352
Total interest expense	35,826	208,928
Net interest income	664,268	589,455
Total provision (credit) for credit losses	(120,142)	356,991
Net interest income after provision (credit) for credit losses	784,410	232,464
Noninterest income:
Mortgage banking	14,692	17,451
Corporate and correspondent investment sales	13,683	10,717
Bank owned life insurance	4,691	4,625
Investment securities gains, net	0	19,139
Other	65,660	73,098
Total noninterest income	303,701	334,242
Noninterest expense:
Salaries, benefits and commissions	338,695	310,136
Professional services	82,002	70,220
Equipment	67,334	64,681
Net occupancy	40,903	39,843
Money transfer expense	23,332	17,136
Goodwill impairment	0	2,185,000
Other	66,724	122,044
Total noninterest expense	618,990	2,809,060
Net income (loss) before income tax expense (benefit)	469,121	(2,242,354)
Income tax expense (benefit)	83,660	(5,069)
Net income (loss)	385,461	(2,237,285)
Less: net income attributable to noncontrolling interests	581	501
Net income (loss) attributable to BBVA USA Bancshares, Inc.	384,880	(2,237,786)
Less: preferred stock dividends	3,143	4,155
Net income (loss) attributable to common shareholder	381,737	(2,241,941)
Service charges on deposit accounts
Noninterest income:
Noninterest income	54,874	61,531
Card and merchant processing fees
Noninterest income:
Noninterest income	49,245	50,091
Money transfer income
Noninterest income:
Noninterest income	32,040	24,548
Investment services sales fees
Noninterest income:
Noninterest income	29,446	34,407
Investment banking and advisory fees
Noninterest income:
Noninterest income	26,783	26,731
Asset management fees
Noninterest income:
Noninterest income	$ 12,587	$ 11,904

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 385,461	$ (2,237,285)
Other comprehensive income (loss), net of tax:
Net unrealized (losses) gains arising during period from debt securities available for sale	(18,139)	99,699
Less: reclassification adjustment for net gains on sale of debt securities available for sale in net income	0	14,572
Net change in net unrealized holding (losses) gains on debt securities available for sale	(18,139)	85,127
Change in unamortized net holding gains on debt securities held to maturity	1,900	1,575
Change in unamortized non-credit related impairment on debt securities held to maturity	140	118
Net change in unamortized holding gains on debt securities held to maturity	2,040	1,693
Unrealized holding (losses) gains arising during period from cash flow hedge instruments	(46,089)	274,837
Change in defined benefit plans	(2,711)	1,754
Other comprehensive (loss) income, net of tax	(64,899)	363,411
Comprehensive income (loss)	320,562	(1,873,874)
Less: comprehensive income attributable to noncontrolling interests	581	501
Comprehensive income (loss) attributable to BBVA USA Bancshares, Inc.	$ 319,981	$ (1,874,375)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholder's Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Preferred StockCumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common StockCumulative Effect, Period of Adoption, Adjusted Balance	Surplus	SurplusCumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment	Accumulated DeficitCumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Cumulative Effect, Period of Adoption, Adjusted Balance	Non-Controlling Interests	Non-Controlling InterestsCumulative Effect, Period of Adoption, Adjusted Balance
Balance, beginning of period at Dec. 31, 2019	$ 13,386,589	$ (150,213)	$ 13,236,376	$ 229,475	$ 229,475	$ 2,230	$ 2,230	$ 14,043,727	$ 14,043,727	$ (917,227)	$ (150,213)	$ (1,067,440)	$ (1,072)	$ (1,072)	$ 29,456	$ 29,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(2,237,285)									(2,237,786)					501
Other comprehensive income (loss), net of tax	363,411												363,411
Preferred stock dividends	(4,155)							(4,155)
Capital contribution	7														7
Balance, end of period at Mar. 31, 2020	11,358,354			229,475		2,230		14,039,572		(3,305,226)			362,339		29,964
Balance, beginning of period at Dec. 31, 2020	11,691,362			229,475		2,230		14,032,205		(2,931,151)			329,105		29,498
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	385,461									384,880					581
Other comprehensive income (loss), net of tax	(64,899)												(64,899)
Preferred stock dividends	(3,143)							(3,143)
Capital contribution	10,274							10,199							75
Balance, end of period at Mar. 31, 2021	$ 12,019,055			$ 229,475		$ 2,230		$ 14,039,261		$ (2,546,271)			$ 264,206		$ 30,154

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities:
Net income (loss)	$ 385,461	$ (2,237,285)
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	59,032	104,267
Goodwill impairment	0	2,185,000
Accretion of discount, loan fees and purchase market adjustments, net	(12,868)	(8,070)
(Credit) provision for credit losses	(120,142)	356,991
Net change in trading account assets	201,262	(535,154)
Net change in trading account liabilities	(4,685)	124,326
Originations and purchases of mortgage loans held for sale	(406,497)	(209,524)
Sale of mortgage loans held for sale	365,860	212,605
Deferred tax expense (benefit)	58,622	(66,187)
Investment securities gains, net	0	(19,139)
Net loss (gain) on sale of premises and equipment	1,726	(483)
Gain on sale of mortgage loans held for sale	(18,347)	(8,775)
Net loss on sale of other real estate and other assets	94	625
Increase in other assets	(867,468)	(7,625)
Increase (decrease) in other liabilities	729	111,425
Net cash (used in) provided by operating activities	(357,221)	2,997
Investing Activities:
Proceeds from sales of debt securities available for sale	0	607,655
Proceeds from prepayments, maturities and calls of debt securities available for sale	1,116,757	1,137,698
Purchases of debt securities available for sale	(806,301)	(769,621)
Proceeds from prepayments, maturities and calls of debt securities held to maturity	713,534	204,481
Purchases of debt securities held to maturity	(2,512,520)	(1,298,774)
Proceeds from sales of equity securities	0	16,479
Purchases of equity securities	(11,312)	(883)
Net change in loan portfolio	1,550,024	(3,702,303)
Purchases of premises and equipment	(18,075)	(25,811)
Proceeds from sales of premises and equipment	20	1,377
Proceeds from settlement of BOLI policies	3,490	442
Proceeds from sales of other real estate owned	2,166	5,301
Net cash provided by (used in) investing activities	37,783	(3,823,959)
Financing Activities:
Net increase in total deposits	112,852	2,251,788
Net increase in federal funds purchased and securities sold under agreements to repurchase	781,858	236,756
Proceeds from FHLB and other borrowings	0	1,000
Repayment of FHLB and other borrowings	(61)	(1,057)
Capital contribution	10,274	7
Preferred dividends paid	(3,143)	(4,155)
Net cash provided by financing activities	901,780	2,484,339
Net increase (decrease) in cash, cash equivalents and restricted cash	582,342	(1,336,623)
Cash, cash equivalents and restricted cash at beginning of year	14,945,395	7,156,689
Cash, cash equivalents and restricted cash at end of period	$ 15,527,737	$ 5,820,066

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation General The accounting and reporting policies of the Company and the methods of applying those policies that materially affect the consolidated financial statements conform with U.S. GAAP and with general financial services industry practices. The accompanying unaudited consolidated financial statements include the accounts of BBVA USA Bancshares, Inc. and its subsidiaries and have been prepared in conformity with U.S. GAAP for interim financial information and in accordance with the instructions to Quarterly Report on Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission. In the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the condensed consolidated financial statements have been included. Operating results for the three months ended March 31, 2021, are not necessarily indicative of the results that may be expected for the year ended December 31, 2021. These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. The Company has evaluated subsequent events for potential recognition and disclosure through the filing date of this Quarterly Report on Form 10-Q to determine if either recognition or disclosure of significant events or transactions is required. Proposed Acquisition by PNC On November 15, 2020, PNC entered into a Stock Purchase Agreement with BBVA for the purchase by PNC of 100% of the issued and outstanding shares of the Company for $11.6 billion in cash on hand in a fixed price structure. PNC is not acquiring BSI, Propel Venture Partners Fund I, L.P. and BBVA Processing Services, Inc. Immediately following the closing of the stock purchase, PNC intends to merge the Parent with and into PNC, with PNC continuing as the surviving entity. Post-closing, PNC intends to merge BBVA USA with and into PNC Bank, National Association, an indirect wholly owned subsidiary of PNC, with PNC Bank continuing as the surviving entity. The transaction is subject to regulatory approvals and certain other customary closing conditions. Use of Estimates in the Preparation of Consolidated Financial Statements The preparation of consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period, the most significant of which relate to the allowance for credit losses and goodwill impairment. Actual results could differ from those estimates. The extent to which the COVID-19 pandemic impacts the results of operations and financial condition, will depend on future developments, which are highly uncertain and cannot be predicted. Recently Adopted Accounting Standards Income Taxes In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes . The amendments in this ASU simplify the accounting for income taxes. This ASU is effective for fiscal years beginning after December 15, 2020, and for interim periods within those fiscal years. The adoption of this standard did not have a material impact on the financial condition and results of operations of the Company. Reference Rate Reform In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform - Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The amendments in this ASU provide optional guidance for a limited period of time to ease the potential burden in accounting for or recognizing the effects of reference rate reform on financial reporting. The amendments in this ASU provide optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU 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 the amendments 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. This ASU is effective as of March 12, 2020 through December 31, 2022. The adoption of this standard had no impact as the Company has not modified any contracts, hedging relationships, or other transactions.

Debt Securities Available for S

Debt Securities Available for Sale and Debt Securities Held to Maturity	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Debt Securities Available for Sale and Debt Securities Held to Maturity	Debt Securities Available for Sale and Debt Securities Held to Maturity The following tables present the adjusted cost and approximate fair value of debt securities available for sale and debt securities held to maturity. March 31, 2021 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 2,041,182 $ 37,301 $ 14,273 $ 2,064,210 Agency mortgage-backed securities 774,456 25,452 2,104 797,804 Agency collateralized mortgage obligations 2,503,150 42,993 631 2,545,512 States and political subdivisions 545 16 — 561 Total $ 5,319,333 $ 105,762 $ 17,008 $ 5,408,087 Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 2,550,157 $ 93,298 $ 23,886 $ 2,619,569 Agency mortgage-backed securities 921,354 — 17,323 904,031 Collateralized mortgage obligations: Agency 8,353,460 125,129 44,685 8,433,904 Non-agency 27,319 6,047 53 33,313 Asset-backed securities and other 45,437 1,472 419 46,490 States and political subdivisions (1) 444,236 16,387 918 459,705 Total $ 12,341,963 $ 242,333 $ 87,284 $ 12,497,012 (1) The Company recorded an allowance of $2 million at March 31, 2021, related to state and political subdivisions, which is not included in the table above. December 31, 2020 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 2,115,915 $ 45,168 $ 14,179 $ 2,146,904 Agency mortgage-backed securities 834,640 32,103 1,095 865,648 Agency collateralized mortgage obligations 2,681,210 50,811 290 2,731,731 States and political subdivisions 617 19 — 636 Total $ 5,632,382 $ 128,101 $ 15,564 $ 5,744,919 Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 1,291,900 $ 112,968 $ — $ 1,404,868 Agency mortgage-backed securities 570,115 2,491 — 572,606 Collateralized mortgage obligations: Agency 8,144,522 147,176 27,234 8,264,464 Non-agency 29,186 5,972 209 34,949 Asset-backed securities and other 48,790 1,217 2,681 47,326 States and political subdivisions (1) 467,610 21,047 3,409 485,248 Total $ 10,552,123 $ 290,871 $ 33,533 $ 10,809,461 (1) The Company recorded an allowance of $2 million at December 31, 2020, related to state and political subdivisions, which is not included in the table above. The investments held within the states and political subdivision caption of debt securities held to maturity relate to private placement transactions underwritten as loans by the Company but that meet the definition of a security within ASC Topic 320, Investments – Debt Securities . The following tables disclose the fair value and the gross unrealized losses of the Company’s available for sale debt securities that were in a loss position at March 31, 2021 and December 31, 2020, for which an allowance for credit losses has not been recorded. This information is aggregated by investment category and the length of time the individual securities have been in an unrealized loss position. March 31, 2021 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 28,410 $ 790 $ 319,805 $ 13,483 $ 348,215 $ 14,273 Agency mortgage-backed securities 32,699 1,286 34,710 818 67,409 2,104 Agency collateralized mortgage obligations 416,524 501 102,578 130 519,102 631 Total $ 477,633 $ 2,577 $ 457,093 $ 14,431 $ 934,726 $ 17,008 December 31, 2020 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 6,041 $ 60 $ 335,296 $ 14,119 $ 341,337 $ 14,179 Agency mortgage-backed securities 25,710 299 35,326 796 61,036 1,095 Agency collateralized mortgage obligations 96,498 114 162,028 176 258,526 290 Total $ 128,249 $ 473 $ 532,650 $ 15,091 $ 660,899 $ 15,564 As indicated in the previous tables, at March 31, 2021 and December 31, 2020, the Company held debt securities in unrealized loss positions. The Company has not recognized the unrealized losses into income for its securities because they are all backed by the U.S. government or government agencies and management does not intend to sell and it is likely that management will not be required to sell these securities before their anticipated recovery, and the decline in fair value is largely due to changes in interest rates and other market conditions. The fair value is expected to recover as the securities approach maturity. The following table presents the activity in the allowance for debt securities held to maturity losses. Three Months Ended March 31, 2021 2020 (In Thousands) Allowance for debt securities held to maturity losses: Balance at beginning of period $ 2,178 $ — Impact of adopting ASC 326 — 1,847 Beginning balance, after adoption of ASC 326 2,178 1,847 (Credit) provision for credit losses (209) 45 Securities charged off — — Recoveries — — Balance at end of period $ 1,969 $ 1,892 The Company regularly evaluates each held to maturity debt security for credit losses on a quarterly basis. The Company has not recorded a provision for credit loss related to its agency securities because they are all backed by the U.S. government or government agencies and have been deemed to have zero expected credit loss as of March 31, 2021 and December 31, 2020. These securities are evaluated quarterly to determine if they still qualify as a zero credit loss security. The Company has non-agency securities that have unrealized losses at March 31, 2021 and December 31, 2020. The Company considers such factors as the extent to which the fair value has been below cost and the financial condition of the issuer. The Company monitors the credit quality of its HTM debt securities through credit ratings. The following tables present the amortized cost of HTM debt securities, aggregated by credit quality indicator. March 31, 2021 Range of Ratings AAA AA+ / A - BBB+ / B- CCC+ / C D NR Total (In Thousands) Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 2,550,157 $ — $ — $ — $ — $ — $ 2,550,157 Agency mortgage-backed securities 921,354 — — — — — 921,354 Collateralized mortgage obligations: Agency 8,353,460 — — — — — 8,353,460 Non-agency 224 6,357 9,770 3,144 771 7,053 27,319 Asset-backed securities and other — 44,870 183 384 — — 45,437 States and political subdivisions (1) — 236,151 208,085 — — — 444,236 $ 11,825,195 $ 287,378 $ 218,038 $ 3,528 $ 771 $ 7,053 $ 12,341,963 (1) The Company recorded an allowance of $2 million at March 31, 2021, related to state and political subdivisions, which is not included in the table above. December 31, 2020 Range of Ratings AAA AA+ / A - BBB+ / B- CCC+ / C D NR Total (In Thousands) Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 1,291,900 $ — $ — $ — $ — $ — $ 1,291,900 Agency mortgage-backed securities 570,115 — — — — — 570,115 Collateralized mortgage obligations: Agency 8,144,522 — — — — — 8,144,522 Non-agency 278 6,840 10,517 5,462 2,533 3,556 29,186 Asset-backed securities and other — 48,127 200 463 — — 48,790 States and political subdivisions (1) — 246,210 221,400 — — — 467,610 $ 10,006,815 $ 301,177 $ 232,117 $ 5,925 $ 2,533 $ 3,556 $ 10,552,123 (1) The Company recorded an allowance of $2 million at December 31, 2020, related to state and political subdivisions, which is not included in the table above. The contractual maturities of the securities portfolios are presented in the following table. March 31, 2021 Amortized Cost Fair Value (In Thousands) Debt securities available for sale: Maturing within one year $ 250,000 $ 250,000 Maturing after one but within five years 1,394,623 1,430,793 Maturing after five but within ten years 4,755 4,828 Maturing after ten years 392,349 379,150 2,041,727 2,064,771 Agency mortgage-backed securities and agency collateralized mortgage obligations 3,277,606 3,343,316 Total $ 5,319,333 $ 5,408,087 Debt securities held to maturity: Maturing within one year $ 11,240 $ 11,265 Maturing after one but within five years 1,392,538 1,486,375 Maturing after five but within ten years 1,546,716 1,537,655 Maturing after ten years 89,336 90,469 3,039,830 3,125,764 Agency mortgage-backed securities and agency and non-agency collateralized mortgage obligations 9,302,133 9,371,248 Total $ 12,341,963 $ 12,497,012 The gross realized gains and losses recognized on sales of debt securities available for sale are shown in the table below. Three Months Ended March 31, 2021 2020 (In Thousands) Gross gains $ — $ 19,139 Gross losses — — Net realized gains $ — $ 19,139

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses The following table presents the composition of the loan portfolio. March 31, 2021 December 31, 2020 (In Thousands) Commercial loans: Commercial, financial and agricultural $ 25,969,245 $ 26,605,142 Real estate – construction 2,396,004 2,498,331 Commercial real estate – mortgage 13,412,272 13,565,314 Total commercial loans 41,777,521 42,668,787 Consumer loans: Residential real estate – mortgage 12,823,641 13,327,774 Equity lines of credit 2,318,208 2,394,894 Equity loans 165,209 179,762 Credit card 812,242 881,702 Consumer direct 1,797,085 1,929,723 Consumer indirect 4,266,336 4,177,125 Total consumer loans 22,182,721 22,890,980 Total loans $ 63,960,242 $ 65,559,767 Accrued interest receivable totaling $213 million and $224 million at March 31, 2021 and December 31, 2020, respectively, was reported in other assets on the Company's Unaudited Condensed Balance Sheets and is excluded from the related footnote disclosures. Allowance for Loan Losses and Credit Quality The following table, which excludes loans held for sale, presents a summary of the activity in the allowance for loan losses. The portion of the allowance that has not been identified by the Company as related to specific loan categories has been allocated to the individual loan categories on a pro rata basis for purposes of the table below: Commercial, Financial and Agricultural Commercial Real Estate (1) Residential Real Estate (2) Consumer (3) Total (In Thousands) Three months ended March 31, 2021 Allowance for loan losses: Beginning balance $ 658,228 $ 311,092 $ 214,469 $ 495,685 $ 1,679,474 Provision (credit) for loan losses (84,950) (30,150) (15,382) 10,549 (119,933) Loans charged-off (12,942) (44) (1,747) (76,628) (91,361) Loan recoveries 11,735 177 1,093 17,724 30,729 Net (charge-offs) recoveries (1,207) 133 (654) (58,904) (60,632) Ending balance $ 572,071 $ 281,075 $ 198,433 $ 447,330 $ 1,498,909 Three Months Ended March 31, 2020 Allowance for loan losses: Beginning balance, prior to adoption of ASC 326 $ 408,197 $ 118,633 $ 99,089 $ 295,074 $ 920,993 Impact of adopting ASC 326 18,389 (35,034) 47,390 154,186 184,931 Beginning balance, after adoption of ASC 326 426,586 83,599 146,479 449,260 1,105,924 Provision for loan losses 140,413 24,548 7,032 184,953 356,946 Loan charge-offs (24,207) (87) (1,999) (115,866) (142,159) Loan recoveries 5,193 173 1,423 23,572 30,361 Net (charge-offs) recoveries (19,014) 86 (576) (92,294) (111,798) Ending balance $ 547,985 $ 108,233 $ 152,935 $ 541,919 $ 1,351,072 (1) Includes commercial real estate – mortgage and real estate – construction loans. (2) Includes residential real estate – mortgage, equity lines of credit and equity loans. (3) Includes credit card, consumer direct and consumer indirect loans. For the three months ended March 31, 2021, the decrease in the allowance for loan losses was primarily driven by the recognition of the updated macroeconomic scenario, which showed substantial improvement in the outlook for the macroeconomy as well as net negative loan growth. The following table presents information on nonaccrual loans, by loan class at March 31, 2021 and December 31, 2020. March 31, 2021 December 31, 2020 Nonaccrual Nonaccrual With No Recorded Allowance Nonaccrual Nonaccrual With No Recorded Allowance Commercial, financial and agricultural $ 529,703 $ 172,832 $ 540,741 $ 93,614 Real estate – construction 25,265 — 25,316 — Commercial real estate – mortgage 418,935 88,910 442,137 77,629 Residential real estate – mortgage 235,441 — 235,463 — Equity lines of credit 45,744 — 42,606 — Equity loans 8,844 — 10,167 — Credit card — — — — Consumer direct 13,098 — 10,087 — Consumer indirect 23,852 — 24,713 — Total loans $ 1,300,882 $ 261,742 $ 1,331,230 $ 171,243 The Company monitors the credit quality of its commercial portfolio using an internal dual risk rating, which considers both the obligor and the facility. The obligor risk ratings are defined by ranges of default probabilities of the borrowers, through internally assigned letter grades (AAA through D2) and the facility risk ratings are defined by ranges of the loss given default. The combination of those two approaches results in the assessment of the likelihood of loss and it is mapped to the regulatory classifications. The Company assigns internal risk ratings at loan origination and at regular intervals subsequent to origination. Loan review intervals are dependent on the size and risk grade of the loan, and are generally conducted at least annually. Additional reviews are conducted when information affecting the loan’s risk grade becomes available. The general characteristics of the risk grades are as follows: • The Company’s internally assigned letter grades “AAA” through “B-” correspond to the regulatory classification “Pass.” These loans do not have any identified potential or well-defined weaknesses and have a high likelihood of orderly repayment. Exceptions exist when either the facility is fully secured by a CD and held at the Company or the facility is secured by properly margined and controlled marketable securities. • Internally assigned letter grades “CCC+” through “CCC” correspond to the regulatory classification “Special Mention.” Loans within this classification have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the institution’s credit position at some future date. Special mention loans are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification. • Internally assigned letter grades “CCC-” through “D1” correspond to the regulatory classification “Substandard.” A loan classified as substandard is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the loan. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. • The internally assigned letter grade “D2” corresponds to the regulatory classification “Doubtful.” Loans classified as doubtful have all the weaknesses inherent in a loan classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable or improbable. The Company considers payment history as the best indicator of credit quality for the consumer portfolio. Nonperforming loans in the tables below include loans classified as nonaccrual, loans 90 days or more past due and loans modified in a TDR 90 days or more past due. The following tables, which exclude loans held for sale, illustrate the credit quality indicators associated with the Company’s loans, by loan class. Commercial March 31, 2021 Recorded Investment of Term Loans by Origination Year 2021 2020 2019 2018 2017 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Commercial, financial and agricultural Pass $ 1,050,720 $ 5,353,169 $ 2,656,762 $ 1,832,641 $ 2,817,125 $ 3,598,179 $ 6,359,264 $ — $ 23,667,860 Special Mention 63,645 15,593 98,900 216,057 86,212 125,224 471,135 — 1,076,766 Substandard 4,893 68,342 99,186 81,450 71,320 215,564 548,331 — 1,089,086 Doubtful — 21,308 11,726 1,789 23,150 34,609 42,951 — 135,533 Total commercial, financial and agricultural $ 1,119,258 $ 5,458,412 $ 2,866,574 $ 2,131,937 $ 2,997,807 $ 3,973,576 $ 7,421,681 $ — $ 25,969,245 Real estate - construction Pass $ 56,927 $ 554,067 $ 755,562 $ 584,592 $ 151,696 $ 75,301 $ 149,250 $ — $ 2,327,395 Special Mention — — 5,199 8,395 19,506 297 — — 33,397 Substandard — 6,218 6,121 726 18,020 4,127 — — 35,212 Doubtful — — — — — — — — — Total real estate - construction $ 56,927 $ 560,285 $ 766,882 $ 593,713 $ 189,222 $ 79,725 $ 149,250 $ — $ 2,396,004 Commercial real estate - mortgage Pass $ 237,099 $ 1,535,357 $ 2,708,280 $ 3,347,413 $ 1,423,688 $ 2,606,898 $ 178,890 $ — $ 12,037,625 Special Mention — 28,911 113,096 192,868 35,808 260,781 30,461 — 661,925 Substandard — 58,450 105,425 114,971 103,119 312,068 12,949 — 706,982 Doubtful — — — — 1,836 3,904 — — 5,740 Total commercial real estate - mortgage $ 237,099 $ 1,622,718 $ 2,926,801 $ 3,655,252 $ 1,564,451 $ 3,183,651 $ 222,300 $ — $ 13,412,272 Commercial December 31, 2020 Recorded Investment of Term Loans by Origination Year 2020 2019 2018 2017 2016 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Commercial, financial and agricultural Pass $ 5,784,167 $ 2,691,532 $ 1,986,737 $ 3,003,653 $ 754,848 $ 3,030,800 $ 6,861,548 $ — $ 24,113,285 Special Mention 78,988 166,896 193,552 107,194 26,025 102,208 685,822 — 1,360,685 Substandard 38,516 66,725 69,752 96,059 82,947 179,285 499,317 — 1,032,601 Doubtful 16,286 12,248 5,476 709 7,395 5,085 51,372 — 98,571 Total commercial, financial and agricultural $ 5,917,957 $ 2,937,401 $ 2,255,517 $ 3,207,615 $ 871,215 $ 3,317,378 $ 8,098,059 $ — $ 26,605,142 Real estate - construction Pass $ 429,483 $ 785,835 $ 710,403 $ 271,229 $ 44,565 $ 38,470 $ 125,184 $ — $ 2,405,169 Special Mention — 9,015 8,414 — 24,059 301 18,223 — 60,012 Substandard 3,973 6,210 551 18,152 — 4,264 — — 33,150 Doubtful — — — — — — — — — Total real estate - construction $ 433,456 $ 801,060 $ 719,368 $ 289,381 $ 68,624 $ 43,035 $ 143,407 $ — $ 2,498,331 Commercial real estate - mortgage Pass $ 1,571,217 $ 2,796,409 $ 3,430,264 $ 1,371,053 $ 777,906 $ 2,113,980 $ 222,864 $ — $ 12,283,693 Special Mention 40,501 131,400 190,140 36,834 147,037 110,279 3,996 — 660,187 Substandard 44,201 34,749 106,067 114,290 112,976 195,821 6,630 — 614,734 Doubtful — — — — 2,758 3,942 — — 6,700 Total commercial real estate - mortgage $ 1,655,919 $ 2,962,558 $ 3,726,471 $ 1,522,177 $ 1,040,677 $ 2,424,022 $ 233,490 $ — $ 13,565,314 Consumer March 31, 2021 Recorded Investment of Term Loans by Origination Year 2021 2020 2019 2018 2017 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Residential real estate - mortgage Performing $ 802,011 $ 3,776,523 $ 1,717,121 $ 740,423 $ 805,765 $ 4,704,304 $ — $ — $ 12,546,147 Nonperforming — 5,313 24,607 22,101 23,232 202,241 — — 277,494 Total residential real estate - mortgage $ 802,011 $ 3,781,836 $ 1,741,728 $ 762,524 $ 828,997 $ 4,906,545 $ — $ — $ 12,823,641 Equity lines of credit Performing $ — $ — $ — $ — $ — $ — $ 2,260,999 $ 9,493 $ 2,270,492 Nonperforming — — — — — — 47,569 147 47,716 Total equity lines of credit $ — $ — $ — $ — $ — $ — $ 2,308,568 $ 9,640 $ 2,318,208 Equity loans Performing $ 5,681 $ 10,588 $ 9,130 $ 7,946 $ 3,545 $ 119,168 $ — $ — $ 156,058 Nonperforming — 55 107 516 133 8,340 — — 9,151 Total equity loans $ 5,681 $ 10,643 $ 9,237 $ 8,462 $ 3,678 $ 127,508 $ — $ — $ 165,209 Credit card Performing $ — $ — $ — $ — $ — $ — $ 789,395 $ — $ 789,395 Nonperforming — — — — — — 22,847 — 22,847 Total credit card $ — $ — $ — $ — $ — $ — $ 812,242 $ — $ 812,242 Consumer direct Performing $ 156,787 $ 462,219 $ 351,468 $ 283,514 $ 79,054 $ 43,284 $ 399,322 $ — $ 1,775,648 Nonperforming — 4,694 4,131 6,495 1,912 757 3,448 — 21,437 Total consumer direct $ 156,787 $ 466,913 $ 355,599 $ 290,009 $ 80,966 $ 44,041 $ 402,770 $ — $ 1,797,085 Consumer indirect Performing $ 568,797 $ 1,667,436 $ 979,931 $ 640,659 $ 259,239 $ 121,830 $ — $ — $ 4,237,892 Nonperforming — 2,841 6,991 9,376 4,968 4,268 — — 28,444 Total consumer indirect $ 568,797 $ 1,670,277 $ 986,922 $ 650,035 $ 264,207 $ 126,098 $ — $ — $ 4,266,336 Consumer December 31, 2020 Recorded Investment of Term Loans by Origination Year 2020 2019 2018 2017 2016 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Residential real estate - mortgage Performing $ 3,881,274 $ 2,013,356 $ 883,919 $ 956,310 $ 1,109,560 $ 4,201,849 $ — $ — $ 13,046,268 Nonperforming 4,468 21,702 21,424 21,167 24,964 187,781 — — 281,506 Total residential real estate - mortgage $ 3,885,742 $ 2,035,058 $ 905,343 $ 977,477 $ 1,134,524 $ 4,389,630 $ — $ — $ 13,327,774 Equity lines of credit Performing $ — $ — $ — $ — $ — $ — $ 2,338,907 $ 10,757 $ 2,349,664 Nonperforming — — — — — — 45,079 151 45,230 Total equity lines of credit $ — $ — $ — $ — $ — $ — $ 2,383,986 $ 10,908 $ 2,394,894 Equity loans Performing $ 11,894 $ 10,684 $ 8,624 $ 3,960 $ 3,242 $ 130,600 $ — $ — $ 169,004 Nonperforming 789 375 484 134 — 8,976 — — 10,758 Total equity loans $ 12,683 $ 11,059 $ 9,108 $ 4,094 $ 3,242 $ 139,576 $ — $ — $ 179,762 Credit card Performing $ — $ — $ — $ — $ — $ — $ 859,749 $ — $ 859,749 Nonperforming — — — — — — 21,953 — 21,953 Total credit card $ — $ — $ — $ — $ — $ — $ 881,702 $ — $ 881,702 Consumer direct Performing $ 547,417 $ 426,921 $ 349,518 $ 97,085 $ 43,170 $ 14,617 $ 432,167 $ — $ 1,910,895 Nonperforming 1,220 3,878 7,995 2,325 642 189 2,579 — 18,828 Total consumer direct $ 548,637 $ 430,799 $ 357,513 $ 99,410 $ 43,812 $ 14,806 $ 434,746 $ — $ 1,929,723 Consumer indirect Performing $ 1,817,720 $ 1,112,510 $ 745,483 $ 305,658 $ 92,924 $ 73,051 $ — $ — $ 4,147,346 Nonperforming 1,821 6,759 10,116 5,791 3,076 2,216 — — 29,779 Total consumer indirect $ 1,819,541 $ 1,119,269 $ 755,599 $ 311,449 $ 96,000 $ 75,267 $ — $ — $ 4,177,125 The following tables present an aging analysis of the Company’s past due loans, excluding loans classified as held for sale. March 31, 2021 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due, Nonaccrual or TDR Not Past Due, Nonaccrual or TDR Total (In Thousands) Commercial, financial and agricultural $ 17,433 $ 19,078 $ 12,609 $ 529,703 $ 77,466 $ 656,289 $ 25,312,956 $ 25,969,245 Real estate – construction 2,538 — 532 25,265 142 28,477 2,367,527 2,396,004 Commercial real estate – mortgage 703 253 7,790 418,935 26,746 454,427 12,957,845 13,412,272 Residential real estate – mortgage 40,315 19,696 41,590 235,441 53,568 390,610 12,433,031 12,823,641 Equity lines of credit 8,325 2,642 1,972 45,744 — 58,683 2,259,525 2,318,208 Equity loans 665 223 134 8,844 19,326 29,192 136,017 165,209 Credit card 8,378 6,442 22,847 — — 37,667 774,575 812,242 Consumer direct 17,028 9,438 8,339 13,098 23,041 70,944 1,726,141 1,797,085 Consumer indirect 30,024 8,513 4,592 23,852 — 66,981 4,199,355 4,266,336 Total loans $ 125,409 $ 66,285 $ 100,405 $ 1,300,882 $ 200,289 $ 1,793,270 $ 62,166,972 $ 63,960,242 December 31, 2020 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due, Nonaccrual or TDR Not Past Due, Nonaccrual or TDR Total (In Thousands) Commercial, financial and agricultural $ 15,862 $ 22,569 $ 35,472 $ 540,741 $ 17,686 $ 632,330 $ 25,972,812 $ 26,605,142 Real estate – construction 3,595 174 532 25,316 145 29,762 2,468,569 2,498,331 Commercial real estate – mortgage 2,113 2,004 1,104 442,137 910 448,268 13,117,046 13,565,314 Residential real estate – mortgage 49,445 20,694 45,761 235,463 53,380 404,743 12,923,031 13,327,774 Equity lines of credit 11,108 4,305 2,624 42,606 — 60,643 2,334,251 2,394,894 Equity loans 1,417 243 317 10,167 19,606 31,750 148,012 179,762 Credit card 12,147 10,191 21,953 — — 44,291 837,411 881,702 Consumer direct 24,076 17,550 8,741 10,087 23,163 83,617 1,846,106 1,929,723 Consumer indirect 47,174 14,951 5,066 24,713 — 91,904 4,085,221 4,177,125 Total loans $ 166,937 $ 92,681 $ 121,570 $ 1,331,230 $ 114,890 $ 1,827,308 $ 63,732,459 $ 65,559,767 It is the Company’s policy to classify TDRs that are not accruing interest as nonaccrual loans. It is also the Company’s policy to classify TDR past due loans that are accruing interest as TDRs and not according to their past due status. The tables above reflect this policy. In response to the COVID-19 pandemic, beginning in March 2020, the Company began providing financial hardship relief in the form of payment deferrals and forbearances to consumer and commercial customers across a wide array of lending products, as well as the suspension of vehicle repossessions and home foreclosures. The payment deferrals and forbearances generally cover periods of three to six months. In most cases as allowed under the CARES Act, these offers are not classified as TDRs and do not result in loans being placed on nonaccrual status. For loans that receive a payment deferral or forbearance under these hardship relief programs, the Company continues to accrue interest and recognize interest income during the period of the deferral. Depending on the terms of each program, all or a portion of this accrued interest may be paid directly by the borrower (either during the relief period, at the end of the relief period or at maturity of the loan). For certain programs, the maturity date of the loan may also be extended by the number of payments deferred. Interest income will continue to be recognized at the original contractual interest rate unless that rate is concurrently modified upon entering the relief program (in which case, the modified rate would be used to recognize interest). At March 31, 2021, the Company had deferrals on approximately three thousand loans with an amortized cost of $279 million. Modifications to borrowers' loan agreements are considered TDRs if a concession is granted for economic or legal reasons related to a borrower’s financial difficulties that otherwise would not be considered. Within each of the Company’s loan classes, TDRs typically involve modification of the loan interest rate to a below market rate or an extension or deferment of the loan. During the three months ended March 31, 2021, $7.8 million of TDR modifications included an interest rate concession and $325.1 million of TDR modifications resulted from modifications to the loan’s structure. During the three months ended March 31, 2020, $5.2 million of TDR modifications included an interest rate concession and $43.6 million of TDR modifications resulted from modifications to the loan’s structure. The following table presents an analysis of the types of loans that were restructured and classified as TDRs, excluding loans classified as held for sale. Three Months Ended March 31, 2021 Three Months Ended March 31, 2020 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 10 $ 109,107 10 $ 41,238 Real estate – construction 1 18,056 — — Commercial real estate – mortgage 10 196,993 2 1,740 Residential real estate – mortgage 21 6,542 8 844 Equity lines of credit 3 154 1 36 Equity loans 5 554 1 192 Credit card — — — — Consumer direct 37 1,527 89 4,762 Consumer indirect — — — — The impact to the allowance for loan losses related to modifications classified as TDRs was approximately $(3.3) million and $5.3 million for the three months ended March 31, 2021 and 2020, respectively. The Company considers TDRs aged 90 days or more past due, charged off or classified as nonaccrual subsequent to modification, where the loan was not classified as a nonperforming loan at the time of modification, as subsequently defaulted. The following table provides a summary of initial subsequent defaults that occurred within one year of the restructure date. The tables exclude loans classified as held for sale as of period-end and includes loans no longer in default as of period-end. Three Months Ended March 31, 2021 Three Months Ended March 31, 2020 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction — — — — Commercial real estate – mortgage — — — — Residential real estate – mortgage 2 855 1 84 Equity lines of credit — — — — Equity loans 1 43 — — Credit card — — — — Consumer direct — — 4 217 Consumer indirect — — — — At March 31, 2021 and December 31, 2020, there were $175.6 million and $132.5 million, respectively, of commitments to lend additional funds to borrowers whose terms have been modified in a TDR. Foreclosure Proceedings

Loan Sales and Servicing

Loan Sales and Servicing	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Loan Sales and Servicing	Loan Sales and Servicing Loans held for sale were $296 million and $237 million at March 31, 2021 and December 31, 2020, respectively, and were comprised entirely of residential real estate - mortgage loans. There were no loans transferred from held for investment to held for sale during the three months ended March 31, 2021 and 2020. Additionally, excluding loans originated for sale in the secondary market, there were no loans or loans held for sale sold during the three months ended March 31, 2021 and 2020. The following table summarizes the Company's sales of loans originated for sale in the secondary market. Three Months Ended March 31, 2021 2020 (In Thousands) Residential real estate loans originated for sale in the secondary market sold (1) $ 347,513 $ 203,830 Net gains recognized on sales of residential real estate loans originated for sale in the secondary market (2) 18,347 8,775 Servicing fees recognized (2) 2,434 2,608 (1) The Company has retained servicing responsibilities for all loans sold that were originated for sale in the secondary market. (2) Recorded as a component of mortgage banking income in the Company's Unaudited Condensed Consolidated Statements of Income. The following table provides the recorded balance of loans sold with retained servicing and the related MSRs. March 31, 2021 December 31, 2020 (In Thousands) Recorded balance of residential real estate mortgage loans sold with retained servicing (1) $ 4,338,556 $ 4,425,180 MSRs (2) 41,432 30,665 (1) These loans are not included in loans on the Company's Unaudited Condensed Consolidated Balance Sheets. (2) Recorded under the fair value method and included in other assets on the Company's Unaudited Condensed Consolidated Balance Sheets. The fair value of MSRs is significantly affected by mortgage interest rates available in the marketplace, which influence mortgage loan prepayment speeds. In general, during periods of declining rates, the fair value of MSRs declines due to increasing prepayments attributable to increased mortgage-refinance activity. During periods of rising interest rates, the fair value of MSRs generally increases due to reduced refinance activity. The Company maintains a non-qualifying hedging strategy to manage a portion of the risk associated with changes in the fair value of the MSR portfolio. This strategy includes the purchase of various trading securities. The interest income, mark-to-market adjustments and gain or loss from sale activities associated with these securities are expected to economically hedge a portion of the change in the fair value of the MSR portfolio. The following table is an analysis of the activity in the Company’s MSRs. Three Months Ended March 31, 2021 2020 (In Thousands) Carrying value, at beginning of period $ 30,665 $ 42,022 Additions 3,985 1,671 Increase (decrease) in fair value: Due to changes in valuation inputs or assumptions 9,832 (10,140) Due to other changes in fair value (1) (3,050) (2,321) Carrying value, at end of period $ 41,432 $ 31,232 (1) Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time. See Note 8, Fair Value Measurements, for additional disclosures related to the assumptions and estimates used in determining fair value of MSRs. At March 31, 2021 and December 31, 2020, the sensitivity of the current fair value of the residential MSRs to immediate 10% and 20% adverse changes in key economic assumptions are included in the following table: March 31, 2021 December 31, 2020 (Dollars in Thousands) Fair value of MSRs $ 41,432 $ 30,665 Composition of residential loans serviced for others: Fixed rate mortgage loans 98.7 % 98.5 % Adjustable rate mortgage loans 1.3 1.5 Total 100.0 % 100.0 % Weighted average life (in years) 4.4 3.6 Prepayment speed: 29.0 % 30.4 % Effect on fair value of a 10% increase $ (1,687) $ (1,620) Effect on fair value of a 20% increase (3,797) (3,585) Weighted average option adjusted spread: 6.2 % 6.2 % Effect on fair value of a 10% increase $ (1,009) $ (656) Effect on fair value of a 20% increase (1,974) (1,285)

Derivatives and Hedging

Derivatives and Hedging	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Derivatives and HedgingThe Company is a party to derivative instruments in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates and foreign currency exchange rates. The Company has made an accounting policy decision not to offset derivative fair value amounts under master netting agreements. See Summary of Significant Accounting Policies in the Notes to Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2020, for additional information on the Company's accounting policies related to derivative instruments and hedging activities. For derivatives cleared through central clearing houses the variation margin payments made are legally characterized as settlements of the derivatives. As a result, these variation margin payments are netted against the fair value of the respective derivative contracts in the balance sheet and related disclosures and there is no fair value presented for these contracts. The following table reflects the notional amount and fair value of derivative instruments included on the Company’s Unaudited Condensed Consolidated Balance Sheets on a gross basis. March 31, 2021 December 31, 2020 Fair Value Fair Value Notional Amount Derivative Assets (1) Derivative Liabilities (2) Notional Amount Derivative Assets (1) Derivative Liabilities (2) (In Thousands) Derivatives designated as hedging instruments: Fair value hedges: Interest rate swaps related to long-term debt $ 3,496,086 $ 9,656 $ 375 $ 3,496,086 $ 11,635 $ 748 Total fair value hedges 9,656 375 11,635 748 Cash flow hedges: Interest rate contracts: Swaps related to commercial loans 10,000,000 — — 10,000,000 — — Swaps related to FHLB advances 120,000 — 1,181 120,000 — 2,108 Foreign currency contracts: Forwards related to currency fluctuations 3,088 — 64 4,102 — 19 Total cash flow hedges — 1,245 — 2,127 Total derivatives designated as hedging instruments $ 9,656 $ 1,620 $ 11,635 $ 2,875 Free-standing derivatives not designated as hedging instruments: Interest rate contracts: Forward contracts related to held for sale mortgages $ 834,280 $ 7,726 $ 573 $ 861,061 $ 1,184 $ 5,193 Interest rate lock commitments 421,906 8,091 151 520,481 17,897 — Equity contracts: Purchased equity option related to equity-linked CDs 30,219 304 — 40,253 574 — Written equity option related to equity-linked CDs 24,259 — 244 32,507 — 468 Foreign exchange contracts: Forwards and swaps related to commercial loans 471,739 5,881 1,746 578,484 1,635 7,424 Spots related to commercial loans 79,755 24 34 47,564 124 38 Swap associated with sale of Visa, Inc. Class B shares 183,292 — 6,408 189,352 — 6,517 Futures contracts (3) — — — 200,000 — — Trading account assets and liabilities: Interest rate contracts for customers 37,158,642 422,427 123,551 38,305,700 616,566 128,831 Foreign exchange contracts for customers 1,664,768 37,221 35,193 1,448,123 36,741 34,598 Total trading account assets and liabilities 459,648 158,744 653,307 163,429 Total free-standing derivative instruments not designated as hedging instruments $ 481,674 $ 167,900 $ 674,721 $ 183,069 (1) Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets. (2) Derivative liabilities are recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets. (3) Changes in fair value are cash settled daily; therefore, there is no ending balance at any given reporting period. Hedging Derivatives The Company uses derivative instruments to manage the risk of earnings fluctuations caused by interest rate volatility. For those financial instruments that qualify and are designated as a hedging relationship, either a fair value hedge or cash flow hedge, the effect of interest rate movements on the hedged assets or liabilities will generally be offset by change in fair value of the derivative instrument. Fair Value Hedges The Company enters into fair value hedging relationships using interest rate swaps to mitigate the Company’s exposure to losses in value as interest rates change. Derivative instruments that are used as part of the Company’s interest rate risk management strategy include interest rate swaps that relate to the pricing of specific balance sheet assets and liabilities. Interest rate swaps are used to convert the Company’s fixed rate long-term debt to a variable rate. The critical terms of the interest rate swaps match the terms of the corresponding hedged items. All components of each derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. The Company recognized no gains or losses for the three months ended March 31, 2021 and 2020, related to hedged firm commitments no longer qualifying as a fair value hedge. At March 31, 2021, the fair value hedges had a weighted average expected remaining term of 2.2 years. Cash Flow Hedges The Company enters into cash flow hedging relationships using interest rate swaps and options, such as caps and floors, to mitigate exposure to the variability in future cash flows or other forecasted transactions associated with its floating rate assets and liabilities. The Company uses interest rate swaps and options to hedge the repricing characteristics of its floating rate commercial loans and FHLB advances. The Company also uses foreign currency forward contracts to hedge its exposure to fluctuations in foreign currency exchange rates due to a portion of money transfer expense being denominated in foreign currency. All components of each derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. The initial assessment of expected hedge effectiveness is based on regression analysis. The ongoing periodic measures of hedge ineffectiveness are based on the expected change in cash flows of the hedged item caused by changes in the benchmark interest rate. There were no gains or losses reclassified from other comprehensive income because of the discontinuance of cash flow hedges related to certain forecasted transactions that are probable of not occurring for the three months ended March 31, 2021 and 2020. At March 31, 2021, cash flow hedges not terminated had a net fair value of $(1) million and a weighted average life of 1.9 years. Net gains of $175.8 million are expected to be reclassified to income over the next 12 months as net settlements occur. The maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions is 2.9 years. The following table presents the effect of hedging derivative instruments on the Company’s Unaudited Condensed Consolidated Statements of Income. Interest Income Interest Expense Interest and fees on loans Interest on FHLB and other borrowings (In Thousands) Three Months Ended March 31, 2021 Total amounts presented in the unaudited condensed consolidated statements of income $ 606,407 $ 14,516 Gains (losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements and amortization on derivatives $ — $ 13,188 Recognized on derivatives — (33,159) Recognized on hedged items — 32,074 Net income (expense) recognized on fair value hedges $ — $ 12,103 Gain (losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ 44,774 $ (914) Net income (expense) recognized on cash flow hedges $ 44,774 $ (914) Three Months Ended March 31, 2020 Total amounts presented in the unaudited condensed consolidated statements of income $ 715,476 $ 21,176 Gains (losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements and amortization on derivatives $ — $ 3,365 Recognized on derivatives — 105,944 Recognized on hedged items — (99,171) Net income (expense) recognized on fair value hedges $ — $ 10,138 Gain (losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized losses reclassified from AOCI into net income (2) $ 5,459 $ (419) Net income (expense) recognized on cash flow hedges $ 5,459 $ (419) (1) See Note 9, Comprehensive Income, for gain or loss recognized for cash flow hedges in accumulated other comprehensive income. (2) Pre-tax The following table presents the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities on the Company's Unaudited Condensed Consolidated Balance Sheets in fair value hedging relationships. Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Liabilities Carrying Amount of Hedged Liabilities Hedged Items Currently Designated Hedged Items No Longer Designated (In Thousands) March 31, 2021 FHLB and other borrowings $ 3,261,916 $ 74,942 $ 1,113 December 31, 2020 FHLB and other borrowings $ 3,260,644 $ 107,023 $ 1,168 Derivatives Not Designated As Hedges Derivatives not designated as hedges include those that are entered into as either economic hedges to facilitate client needs or as part of the Company’s overall risk management strategy. Economic hedges are those that do not qualify to be treated as a fair value hedge, cash flow hedge or foreign currency hedge for accounting purposes, but are necessary to economically manage the risk exposure associated with the assets and liabilities of the Company. The Company holds a portfolio of futures, forwards and interest rate lock commitments as well as options related to its equity-linked CDs to mitigate its economic risk exposure. The Company also enters into a variety of interest rate contracts and foreign exchange contracts in its trading activities. See Note 13, Derivatives and Hedging, in the Notes to the December 31, 2020, Consolidated Financial Statements for a description of the Company's derivatives not designated as hedges. The net gains and losses recorded in the Company's Unaudited Condensed Consolidated Statements of Income from free-standing derivative instruments not designated as hedging instruments are summarized in the following table. Gain (Loss) for the Condensed Consolidated Three Months Ended March 31, Statements of Income Caption 2021 2020 (In Thousands) Futures contracts Mortgage banking income and corporate and correspondent investment sales $ 6 $ (793) Interest rate contracts: Interest rate lock commitments Mortgage banking income (9,957) 9,322 Option contracts related to mortgage servicing rights Mortgage banking income — 1,528 Forward contracts related to residential mortgage loans held for sale Mortgage banking income 11,162 (5,907) Interest rate contracts for customers Corporate and correspondent investment sales 7,395 4,137 Equity contracts: Purchased equity option related to equity-linked CDs Other expense (270) (1,888) Written equity option related to equity-linked CDs Other expense 224 1,624 Foreign currency contracts: Forward and swap contracts related to commercial loans Other income 7,095 25,981 Spot contracts related to commercial loans Other income (2,179) 771 Foreign currency exchange contracts for customers Corporate and correspondent investment sales 6,082 4,701 Derivatives Credit and Market Risks By using derivative instruments, the Company is exposed to credit and market risk. If the counterparty fails to perform, credit risk is equal to the extent of the Company’s fair value gain in a derivative. When the fair value of a derivative instrument contract is positive, this generally indicates that the counterparty owes the Company and, therefore, creates a credit risk for the Company. When the fair value of a derivative instrument contract is negative, the Company owes the counterparty and, therefore, it has no credit risk. The Company minimizes the credit risk in derivative instruments by entering into transactions with high-quality counterparties that are reviewed periodically. Credit losses are also mitigated through collateral agreements and other contract provisions with derivative counterparties. Market risk is the adverse effect that a change in interest rates or implied volatility rates has on the value of a financial instrument. The Company manages the market risk associated with interest rate contracts by establishing and monitoring limits as to the types and degree of risk that may be undertaken. The Company’s derivatives activities are monitored by its Asset/Liability Committee as part of its risk-management oversight. The Company’s Asset/Liability Committee is responsible for mandating various hedging strategies that are developed through its analysis of data from financial simulation models and other internal and industry sources. The resulting hedging strategies are then incorporated into the Company’s overall interest rate risk management and trading strategies. Entering into interest rate swap agreements and options involves not only the risk of dealing with counterparties and their ability to meet the terms of the contracts but also interest rate risk associated with unmatched positions. At March 31, 2021, interest rate swap agreements and options classified as trading were substantially matched. The Company had credit risk of $460 million related to derivative instruments in the trading account portfolio, which does not take into consideration master netting arrangements or the value of the collateral. There were no credit losses associated with derivative instruments classified as trading for the three months ended March 31, 2021 and 2020. At March 31, 2021 and December 31, 2020, there were no material nonperforming derivative positions classified as trading. The Company’s derivative positions designated as hedging instruments are primarily executed in the over-the-counter market. These positions at March 31, 2021, have credit risk of $10 million, which does not take into consideration master netting arrangements or the value of the collateral. There were no credit losses associated with derivative instruments classified as nontrading for the three months ended March 31, 2021 and 2020. At March 31, 2021 and December 31, 2020, there were no nonperforming derivative positions classified as nontrading. As of March 31, 2021 and December 31, 2020, the Company had recorded the right to reclaim cash collateral of $163 million and $199 million, respectively, within other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets. As of March 31, 2021 and December 31, 2020, the Company had recorded the obligation to return cash collateral of $23 million and $14 million, respectively, within deposits on the Company’s Unaudited Condensed Consolidated Balance Sheets. Contingent Features Certain of the Company’s derivative instruments contain provisions that require the Company’s debt maintain a certain credit rating from each of the major credit rating agencies. If the Company’s debt were to fall below this rating, it would be in violation of these provisions, and the counterparties to the derivative instruments could demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position on March 31, 2021, was $50 million for which the Company has collateral requirements of $48 million in the normal course of business. If the credit risk-related contingent features underlying these agreements had been triggered on March 31, 2021, the Company’s collateral requirements to its counterparties would increase by $2 million. The aggregate fair value of all derivative instruments with credit risk-related contingent features that were in a liability position on December 31, 2020, was $66 million for which the Company had collateral requirements of $64 million in the normal course of business. If the credit risk-related contingent features underlying these agreements had been triggered on December 31, 2020, the Company’s collateral requirements to its counterparties would have increased by $2 million. Netting of Derivative Instruments The Company is party to master netting arrangements with its financial institution counterparties for some of its derivative and hedging activities. The Company does not offset assets and liabilities under these master netting arrangements for financial statement presentation purposes. The master netting arrangements provide for single net settlement of all derivative instrument arrangements, as well as collateral, in the event of default with respect to, or termination of, any one contract with the respective counterparties. Cash collateral is usually posted by the counterparty with a net liability position in accordance with contract thresholds. The following table represents the Company’s total gross derivative instrument assets and liabilities subject to an enforceable master netting arrangement. The derivative instruments the Company has with its customers are not subject to an enforceable master netting arrangement. Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) March 31, 2021 Derivative financial assets: Subject to a master netting arrangement $ 46,117 $ — $ 46,117 $ — $ 13,195 $ 32,922 Not subject to a master netting arrangement 445,213 — 445,213 — — 445,213 Total derivative financial assets $ 491,330 $ — $ 491,330 $ — $ 13,195 $ 478,135 Derivative financial liabilities: Subject to a master netting arrangement $ 112,079 $ — $ 112,079 $ — $ 112,079 $ — Not subject to a master netting arrangement 57,441 — 57,441 — — 57,441 Total derivative financial liabilities $ 169,520 $ — $ 169,520 $ — $ 112,079 $ 57,441 December 31, 2020 Derivative financial assets: Subject to a master netting arrangement $ 38,554 $ — $ 38,554 $ — $ 3,771 $ 34,783 Not subject to a master netting arrangement 647,802 — 647,802 — — 647,802 Total derivative financial assets $ 686,356 $ — $ 686,356 $ — $ 3,771 $ 682,585 Derivative financial liabilities: Subject to a master netting arrangement $ 153,524 $ — $ 153,524 $ — $ 153,524 $ — Not subject to a master netting arrangement 32,420 — 32,420 — — 32,420 Total derivative financial liabilities $ 185,944 $ — $ 185,944 $ — $ 153,524 $ 32,420

Securities Financing Activities

Securities Financing Activities	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Securities Financing Activities	Securities Financing Activities Netting of Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase The Company has various financial assets and liabilities that are subject to enforceable master netting agreements or similar agreements. The Company's derivatives that are subject to enforceable master netting agreements or similar transactions are discussed in Note 5, Derivatives and Hedging. The Company enters into agreements under which it purchases or sells securities subject to an obligation to resell or repurchase the same or similar securities. Securities purchased under agreements to resell and securities sold under agreements to repurchase are generally accounted for as collateralized financing transactions and recorded at the amounts at which the securities were purchased or sold plus accrued interest. The securities pledged as collateral are generally U.S. Treasury securities and other U.S. government agency securities and mortgage-backed securities. Securities purchased under agreements to resell and securities sold under agreements to repurchase are governed by a MRA. Under the terms of the MRA, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the nondefaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted. These amounts are limited to the contract asset/liability balance, and accordingly, do not include excess collateral received or pledged. The Company offsets the assets and liabilities under netting arrangements for the balance sheet presentation of securities purchased under agreements to resell and securities sold under agreements to repurchase provided certain criteria are met that permit balance sheet netting. Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) March 31, 2021 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 3,367,186 $ 2,400,665 $ 966,521 $ 966,521 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 3,367,001 $ 2,400,665 $ 966,336 $ 966,336 $ — $ — December 31, 2020 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 986,290 $ 798,097 $ 188,193 $ 188,193 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 982,575 $ 798,097 $ 184,478 $ 184,478 $ — $ — (1) The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted. Collateral Associated with Securities Financing Activities Securities sold under agreements to repurchase are accounted for as secured borrowings. The following table presents the Company's related activity, by collateral type and remaining contractual maturity. Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater Than 90 days Total (In Thousands) March 31, 2021 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 1,128,705 $ 872,063 $ 296,875 $ 960,795 $ 3,258,438 Mortgage-backed securities 108,563 — — — 108,563 Total $ 1,237,268 $ 872,063 $ 296,875 $ 960,795 $ 3,367,001 December 31, 2020 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 880,200 $ — $ 102,375 $ — $ 982,575 Mortgage-backed securities — — — — — Total $ 880,200 $ — $ 102,375 $ — $ 982,575 In the event of a significant decline in fair value of the collateral pledged for the securities sold under agreements to repurchase, the Company would be required to provide additional collateral. The Company minimizes the risk by monitoring the liquidity and credit quality of the collateral, as well as the maturity profile of the transactions.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Commitments to Extend Credit & Standby and Commercial Letters of Credit The following represents the Company’s commitments to extend credit, standby letters of credit and commercial letters of credit: March 31, 2021 December 31, 2020 (In Thousands) Commitments to extend credit $ 28,216,551 $ 28,251,150 Standby and commercial letters of credit 836,442 853,450 Commitments to extend credit are agreements to lend to customers as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Standby and commercial letters of credit are commitments issued by the Company to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing and similar transactions, and expire in decreasing amounts with terms ranging from one The credit risk involved in issuing letters of credit and commitments is essentially the same as that involved in extending loan facilities to customers. The fair value of the letters of credit and commitments typically approximates the fee received from the customer for issuing such commitments. These fees are deferred and are recognized over the commitment period. At both March 31, 2021 and December 31, 2020, the recorded amount of these deferred fees was $7 million, respectively. The Company holds various assets as collateral supporting those commitments for which collateral is deemed necessary. At March 31, 2021, the maximum potential amount of future undiscounted payments the Company could be required to make under outstanding standby letters of credit was $836 million. At March 31, 2021 and December 31, 2020, the Company had allowance for credit losses related to letters of credit and unfunded commitments recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheet of $134 million and $150 million, respectively. Loan Sale Recourse The Company has potential recourse related to specific FNMA securitizations. At both March 31, 2021 and December 31, 2020, the amount of potential recourse was $18 million of which the Company had reserved $693 thousand which is recorded in accrued expenses and other liabilities on the Company's Unaudited Condensed Consolidated Balance Sheets for the respective periods. The Company also issues standard representations and warranties related to mortgage loan sales to government-sponsored agencies. Although these agreements often do not specify limitations, the Company does not believe that any payments related to these representations and warranties would materially change the financial condition or results of operations of the Company. At March 31, 2021 and December 31, 2020, the Company had $3.0 million and $2.7 million, respectively, of reserves in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets related to potential losses from loans sold. Legal and Regulatory Proceedings In the ordinary course of business, the Company is subject to legal proceedings, including claims, litigation, investigations and administrative proceedings, all of which are considered incidental to the normal conduct of business. The Company believes it has substantial defenses to the claims asserted against it in its currently outstanding legal proceedings and, with respect to such legal proceedings, intends to defend itself vigorously. Set forth below are descriptions of certain of the Company’s legal proceedings. In January 2014, the Bank was named as a defendant in a lawsuit filed in the District Court of Dallas County, Texas, David Bagwell, individually and as Trustee of the David S. Bagwell Trust, et al. v. BBVA USA, et al., wherein the plaintiffs (who are the borrowers and guarantors of the underlying loans) allege that BBVA USA wrongfully sold their loans to a third party after representing that it would not do so. The plaintiffs seek unspecified monetary relief. Following trial in December 2017, the jury rendered a verdict in favor of the plaintiffs totaling $98 million. On June 27, 2018, the court entered a judgment in favor of the plaintiffs in the amount of $96 million, which includes prejudgment interest. The Bank appealed and on December 14, 2020, the appellate court issued an opinion reversing the jury verdict and entering a plaintiffs take nothing judgment in the Company’s favor on all claims. Plaintiffs are seeking further review of the appellate court’s decision. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In October 2016, BSI was named as a defendant in a putative class action lawsuit filed in the District Court of Harris County, Texas, St. Lucie County Fire District Firefighters' Pension Trust, individually and on behalf of all others similarly situated v. Southwestern Energy Company, et al., wherein the plaintiffs allege that Southwestern Energy Company, its officers and directors, and the underwriting defendants (including BSI) made inaccurate and misleading statements in the registration statement and prospectus related to a securities offering. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In March 2019, the Company and its subsidiary, Simple Finance Technology Corp., were named as defendants in a putative class action lawsuit filed in the United States District Court for the Northern District of California, Amitahbo Chattopadhyay v. BBVA USA Bancshares, Inc., et al. Plaintiff claims that Simple and the Company only permit United States citizens to open Simple accounts (which are exclusively originated through online channels). Plaintiff later amended the complaint to also take issue with BBVA USA’s practice of directing non-citizen applicants to complete the online account origination processes in a physical branch location. Plaintiff alleges that these practices constitute alienage discrimination and violations of California's Unruh Act. BBVA USA’s motion to dismiss was granted on November 2, 2020 and the plaintiffs are pursuing an appeal of that ruling. The Company believes that there are substantial defenses to these claims and intends to defend them vigorously. In July 2019, the Company was named as a defendant in a putative class action lawsuit filed in the United States District Court for the Northern District of Alabama, Ferguson v. BBVA USA Bancshares, Inc., wherein the plaintiffs allege certain investment options within the Company’s employee retirement plan violate provisions of ERISA. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In April 2020, the Bank was named in a putative class action lawsuit filed in the District Court of Bexar County, Texas styled Zamora-Orduna Realty Group LLC v. BBVA USA, wherein plaintiffs allege the Bank tortiously failed to process certain loan requests submitted in connection with the federal Paycheck Protection Program. The plaintiffs seek an amount not less than $10 million along with other demands for unspecified monetary relief. The court recently entered an order granting the Company’s motion to dismiss with prejudice. Appellate options for the plaintiffs currently exist. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In April 2020, BBVA USA was named as a defendant in a lawsuit filed in the United States District Court for the Eastern District of Texas, Marshall Division originally styled Estech Systems, Inc. v. BBVA USA Bancshares, Inc., alleging that BBVA USA has violated intellectual property rights owned by the plaintiff in connection with various patents regarding voice-over-internet protocols (VoIP). The plaintiff alleges that BBVA USA’s use of certain phone systems and technologies violate its claimed patent rights. The plaintiff seeks unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In June 2020, BBVA USA was named as a defendant in a putative class action lawsuit filed in the United States District Court for the Southern District of California styled Sarah Hill v. BBVA USA, challenging BBVA USA’s assessment of certain overdraft fees. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In July 2020, BSI was named as a defendant in a putative class action lawsuit filed in the Supreme Court of the State of New York, County of New York, City of Miami Fire Fighters’ and Police Officers’ Retirement Trust, individually and on behalf of all others similarly situated v. Occidental Petroleum Corporation, et al., wherein the plaintiffs allege that Occidental Petroleum Corporation, its officers and directors, and the underwriting defendants (including BSI) made inaccurate and misleading statements in the registration statement and prospectus related to a securities offering. The plaintiffs seek unspecified monetary relief. The court recently entered an order granting the Company’s motion to dismiss. Appellate options for the plaintiffs currently exist. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In October 2020, BBVA USA was joined in a Delaware state court action styled Yatra Online v. Ebix, et al., alleging breach of contract and tortious interference with a prospective transaction between Yatra Online and Ebix. The plaintiff seeks unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In December 2020, BBVA USA was named as a defendant in a putative class action lawsuit filed in the United States District Court for the Southern District of California styled Eisenberg v. BBVA USA, challenging BBVA USA’s assessment of certain overdraft fees. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In December 2020, the Company was named as a defendant in a putative class action lawsuit filed in the United States District Court for the Northern District of Alabama, Drake v. BBVA USA Bancshares, Inc., et al., wherein the plaintiff alleges certain investment options within the Company’s employee retirement plan violate provisions of ERISA. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. The Company is or may become involved from time to time in information-gathering requests, reviews, investigations and proceedings (both formal and informal) by various governmental regulatory agencies, law enforcement authorities and self-regulatory bodies regarding the Company’s business. Such matters may result in material adverse consequences, including without limitation adverse judgments, settlements, fines, penalties, orders, injunctions, alterations in the Company’s business practices or other actions, and could result in additional expenses and collateral costs, including reputational damage, which could have a material adverse impact on the Company’s business, consolidated financial position, results of operations or cash flows. The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that the Company will incur a loss and the amount of the loss can be reasonably estimated, the Company records a liability in its consolidated financial statements. These legal reserves may be increased or decreased to reflect any relevant developments. Where a loss is not probable or the amount of a probable loss is not reasonably estimable, the Company does not accrue legal reserves. At March 31, 2021, the Company had accrued legal reserves in the amount of $3 million. Additionally, for those matters where a loss is reasonably possible and the amount of loss is reasonably estimable, the Company estimates the amount of losses that it could incur beyond the accrued legal reserves, if any. Under U.S. GAAP, an event is “reasonably possible” if “the chance of the future event or events occurring is more than remote but less than likely” and an event is “remote" if “the chance of the future event or events occurring is slight.” Based on information available at March 31, 2021, management estimates no reasonably possible losses in excess of related reserves. The matters underlying this estimate will change from time to time, and the actual results may vary significantly from this estimate. Those matters for which an estimate is not possible are not included within this estimate; therefore, this estimate does not represent the Company’s maximum loss exposure. While the outcome of legal proceedings and the timing of the ultimate resolution are inherently difficult to predict, based on information currently available, advice of counsel and available insurance coverage, the Company believes that it has established adequate legal reserves. Further, based upon available information, the Company is of the opinion that these legal proceedings, individually or in the aggregate, will not have a material adverse effect on the Company’s financial condition or results of operations. However, in the event of unexpected future developments, it is possible that the ultimate resolution of those matters, if unfavorable, may be material to the Company’s results of operations for any particular period, depending, in part, upon the size of the loss or liability imposed and the operating results for the applicable period. Income Tax Review

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements See Note 19, Fair Value Measurements, in the Notes to the December 31, 2020, Consolidated Financial Statements for a description of valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2021 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 101,539 $ 101,539 $ — $ — Interest rate contracts 422,427 — 422,427 — Foreign exchange contracts 37,221 — 37,221 — Total trading account assets 561,187 101,539 459,648 — Debt securities available for sale: U.S. Treasury and other U.S. government agencies 2,064,210 1,637,944 426,266 — Mortgage-backed securities 797,804 — 797,804 — Collateralized mortgage obligations 2,545,512 — 2,545,512 — States and political subdivisions 561 — 561 — Total debt securities available for sale 5,408,087 1,637,944 3,770,143 — Loans held for sale 295,570 — 295,570 — Derivative assets: Interest rate contracts 25,473 — 17,382 8,091 Equity contracts 304 — 304 — Foreign exchange contracts 5,905 — 5,905 — Total derivative assets 31,682 — 23,591 8,091 Other assets: Equity securities 16,473 16,473 — — MSR 41,432 — — 41,432 SBIC 198,200 — — 198,200 Liabilities: Trading account liabilities: Interest rate contracts $ 123,551 $ — $ 123,551 $ — Foreign exchange contracts 35,193 — 35,193 — Total trading account liabilities 158,744 — 158,744 — Derivative liabilities: Interest rate contracts 2,280 — 2,129 151 Equity contracts 244 — 244 — Foreign exchange contracts 1,844 — 1,844 — Total derivative liabilities 4,368 — 4,217 151 Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2020 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 109,142 $ 109,142 $ — $ — Interest rate contracts 616,566 — 616,566 — Foreign exchange contracts 36,741 — 36,741 — Total trading account assets 762,449 109,142 653,307 — Debt securities available for sale: U.S. Treasury and other U.S. government agencies 2,146,904 1,694,160 452,744 — Mortgage-backed securities 865,648 — 865,648 — Collateralized mortgage obligations 2,731,731 — 2,731,731 — States and political subdivisions 636 — 636 — Total debt securities available for sale 5,744,919 1,694,160 4,050,759 — Loans held for sale 236,586 — 236,586 — Derivative assets: Interest rate contracts 30,716 — 12,819 17,897 Equity contracts 574 — 574 — Foreign exchange contracts 1,759 — 1,759 — Total derivative assets 33,049 — 15,152 17,897 Other assets: Equity securities 14,032 14,032 — — MSR 30,665 — — 30,665 SBIC 162,578 — — 162,578 Liabilities: Trading account liabilities: Interest rate contracts $ 128,831 $ — $ 128,831 $ — Foreign exchange contracts 34,598 — 34,598 — Total trading account liabilities 163,429 — 163,429 — Derivative liabilities: Interest rate contracts 8,049 — 8,049 — Equity contracts 468 — 468 — Foreign exchange contracts 7,481 — 7,481 — Total derivative liabilities 15,998 — 15,998 — The following tables reconcile the assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3). Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Three Months Ended March 31, Interest Rate Contracts, net Other Assets - MSR Other Assets - SBIC (In Thousands) Balance, December 31, 2019 $ 3,088 $ 42,022 $ 119,475 Transfers into Level 3 — — — Transfers out of Level 3 — — — Total gains or losses (realized/unrealized): Included in earnings (1) 9,322 (12,461) 27,658 Included in other comprehensive income — — — Purchases, issuances, sales and settlements: Purchases — — 9,267 Issuances — 1,671 — Sales — — — Settlements — — — Balance, March 31, 2020 $ 12,410 $ 31,232 $ 156,400 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at March 31, 2020 $ 9,322 $ (12,461) $ 27,658 Balance, December 31, 2020 $ 17,897 $ 30,665 $ 162,578 Transfers into Level 3 — — — Transfers out of Level 3 — — — Total gains or losses (realized/unrealized): Included in earnings (1) (9,957) 6,782 21,376 Included in other comprehensive income — — — Purchases, issuances, sales and settlements: Purchases — — 14,246 Issuances — 3,985 — Sales — — — Settlements — — — Balance, March 31, 2021 $ 7,940 $ 41,432 $ 198,200 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at March 31, 2021 $ (9,957) $ 6,782 $ 21,376 (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income. Assets Measured at Fair Value on a Nonrecurring Basis Periodically, certain assets may be recorded at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of lower of cost or fair value accounting or write-downs of individual assets due to impairment. The following tables represent those assets that were subject to fair value adjustments during the three months ended March 31, 2021 and 2020, and still held as of the end of the period, and the related gains and losses from fair value adjustments on assets sold during the period as well as assets still held as of the end of the period. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) March 31, 2021 (Level 1) (Level 2) (Level 3) Three Months Ended March 31, 2021 (In Thousands) Nonrecurring fair value measurements Assets: OREO $ 10,965 $ — $ — $ 10,965 $ (450) Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) March 31, 2020 (Level 1) (Level 2) (Level 3) Three Months Ended March 31, 2020 (In Thousands) Nonrecurring fair value measurements Assets: OREO $ 21,392 $ — $ — $ 21,392 $ (707) The following is a description of the methodologies applied for valuing these assets: OREO – OREO is recorded at the lower of recorded balance or fair value, which is based on appraisals and third-party price opinions, less estimated costs to sell. The fair value is classified as Level 3. The tables below present information about the significant unobservable inputs for material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring and nonrecurring basis. Quantitative Information about Level 3 Fair Value Measurements Fair Value at Range of Unobservable Inputs March 31, 2021 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Interest rate contracts, net $ 7,940 Discounted cash flow Closing ratios (pull-through) 4.8% - 99.8% (64.4%) Cap grids 0.5% - 2.5% (1.2%) Other assets - MSRs 41,432 Discounted cash flow Option adjusted spread 6.0% - 8.3% (6.2%) Constant prepayment rate or life speed 0.1% - 97.1% (13.6%) Cost to service $65 - $4,000 ($100) Other assets - SBIC investments 198,200 Transaction price Transaction price N/A Nonrecurring fair value measurements: OREO 10,965 Appraised value Appraised value 8.0% (1) (1) Represents discount to appraised value for estimated costs to sell. Quantitative Information about Level 3 Fair Value Measurements Fair Value at Range of Unobservable Inputs December 31, 2020 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Interest rate contracts, net $ 17,897 Discounted cash flow Closing ratios (pull-through) 18.2% - 100.0% (62.5%) Cap grids 0.3% - 2.6% (1.0%) Other assets - MSRs 30,665 Discounted cash flow Option adjusted spread 6.0% - 8.3% (6.2%) Constant prepayment rate or life speed 3.5% - 90.3% (19.9%) Cost to service $65 - $4,000 ($100) Other assets - SBIC investments 162,578 Transaction price Transaction price N/A Nonrecurring fair value measurements: OREO 11,448 Appraised value Appraised value 8.0% (1) (1) Represents discount to appraised value for estimated costs to sell. The following provides a description of the sensitivity of the valuation technique to changes in unobservable inputs for recurring fair value measurements. Recurring Fair Value Measurements Using Significant Unobservable Inputs Interest Rate Contracts - Interest Rate Lock Commitments Significant unobservable inputs used in the valuation of interest rate contracts are pull-through and cap grids. Increases or decreases in the pull-through or cap grids will have a corresponding impact in the value of interest rate contracts. Other Assets - MSRs The significant unobservable inputs used in the fair value measurement of MSRs are option-adjusted spreads, constant prepayment rate or life speed, and cost to service assumptions. The impact of prepayments and changes in the option-adjusted spread are based on a variety of underlying inputs. Increases or decreases to the underlying cash flow inputs will have a corresponding impact on the value of the MSR asset. The impact of the costs to service assumption will have a directionally opposite change in the fair value of the MSR asset. Other Assets - SBIC Investments The significant unobservable inputs used in the fair value measurement of SBIC Investments are initially based upon transaction price. Increases or decreases in valuation factors such as recent or proposed purchase or sale of debt or equity of the issuer, pricing by other dealers in similar securities, size of position held, liquidity of the market will have a corresponding impact in the value of SBIC investments. Fair Value of Financial Instruments The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments, excluding financial instruments measured at fair value on a recurring basis, are as follows: March 31, 2021 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 15,142,724 $ 15,142,724 $ 15,142,724 $ — $ — Debt securities held to maturity 12,341,963 12,497,012 2,619,569 9,337,935 539,508 Loans 63,960,242 62,435,802 — — 62,435,802 Liabilities: Deposits $ 85,970,954 $ 85,979,097 $ — $ 85,979,097 $ — FHLB and other borrowings 3,517,567 3,512,568 — 3,512,568 — Federal funds purchased and securities sold under agreements to repurchase 966,336 966,336 — 966,336 — December 31, 2020 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 14,607,908 $ 14,607,908 $ 14,607,908 $ — $ — Debt securities held to maturity 10,552,123 10,809,461 1,404,868 8,837,070 567,523 Loans 65,559,767 64,459,914 — — 64,459,914 Liabilities: Deposits $ 85,858,381 $ 85,872,252 $ — $ 85,872,252 $ — FHLB and other borrowings 3,548,492 3,489,951 — 3,489,951 — Federal funds purchased and securities sold under agreements to repurchase 184,478 184,478 — 184,478 — Fair Value Option The Company has elected to apply the fair value option for single family real estate mortgage loans originated for resale in the secondary market. The election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting. The Company has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. At both March 31, 2021 and December 31, 2020, no loans held for sale for which the fair value option was elected were 90 days or more past due or were in nonaccrual. Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest and fees on loans in the Company's Unaudited Condensed Consolidated Statements of Income. Net gains (losses) of $(6.3) million and $2.6 million resulting from changes in fair value of these loans were recorded in noninterest income during the three months ended March 31, 2021 and 2020, respectively. The Company also had fair value changes on forward contracts related to residential mortgage loans held for sale of approximately $11.2 million and $(5.9) million for the three months ended March 31, 2021 and 2020, respectively. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential mortgage loans measured at fair value. Aggregate Fair Value Aggregate Unpaid Principal Balance Difference (In Thousands) March 31, 2021 Residential mortgage loans held for sale $ 295,570 $ 289,222 $ 6,348 December 31, 2020 Residential mortgage loans held for sale $ 236,586 $ 223,929 $ 12,657

Comprehensive Income

Comprehensive Income	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Comprehensive Income	Comprehensive Income Comprehensive income is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances arising from nonowner sources. The following summarizes the change in the components of other comprehensive income. Three Months Ended March 31, 2021 2020 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income: Unrealized holding (losses) gains arising during period from debt securities available for sale $ (23,783) $ (5,644) $ (18,139) $ 130,943 $ 31,244 $ 99,699 Less: reclassification adjustment for net gains on sale of debt securities in net income — — — 19,139 4,567 14,572 Net change in unrealized (losses) gains on debt securities available for sale (23,783) (5,644) (18,139) 111,804 26,677 85,127 Change in unamortized net holding gains on debt securities held to maturity 2,492 592 1,900 2,069 494 1,575 Change in unamortized non-credit related impairment on debt securities held to maturity 183 43 140 155 37 118 Net change in unamortized holding gains on debt securities held to maturity 2,675 635 2,040 2,224 531 1,693 Unrealized holding (losses) gains arising during period from cash flow hedge instruments (60,428) (14,339) (46,089) 360,963 86,126 274,837 Change in defined benefit plans (3,553) (842) (2,711) 2,301 547 1,754 Other comprehensive (loss) income $ (85,089) $ (20,190) $ (64,899) $ 477,292 $ 113,881 $ 363,411 Activity in accumulated other comprehensive income (loss), net of tax was as follows: Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity Accumulated Gains (Losses) on Cash Flow Hedging Instruments Defined Benefit Plan Adjustment Unamortized Impairment Losses on Debt Securities Held to Maturity Total (In Thousands) Balance, December 31, 2019 $ (40,080) $ 91,445 $ (46,666) $ (5,771) $ (1,072) Other comprehensive income before reclassifications 99,699 278,675 — — 378,374 Amounts reclassified from accumulated other comprehensive (loss) income (12,997) (3,838) 1,754 118 (14,963) Net current period other comprehensive income 86,702 274,837 1,754 118 363,411 Balance, March 31, 2020 $ 46,622 $ 366,282 $ (44,912) $ (5,653) $ 362,339 Balance, December 31, 2020 $ 64,542 $ 306,310 $ (36,450) $ (5,297) $ 329,105 Other comprehensive loss before reclassifications (18,139) (12,637) — — (30,776) Amounts reclassified from accumulated other comprehensive (loss) income 1,900 (33,452) (2,711) 140 (34,123) Net current period other comprehensive income (loss) (16,239) (46,089) (2,711) 140 (64,899) Balance, March 31, 2021 $ 48,303 $ 260,221 $ (39,161) $ (5,157) $ 264,206 The following table presents information on reclassifications out of accumulated other comprehensive income (loss). Details About Accumulated Other Comprehensive Income (Loss) Components Amounts Reclassified From Accumulated Other Comprehensive Income (Loss) (1) Condensed Consolidated Statements of Income Caption Three Months Ended March 31, 2021 2020 (In Thousands) Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity $ — $ 19,139 Investment securities gains, net (2,492) (2,069) Interest on debt securities held to maturity (2,492) 17,070 592 (4,073) Income tax (expense) benefit $ (1,900) $ 12,997 Net of tax Accumulated Gains (Losses) on Cash Flow Hedging Instruments $ 44,774 $ 5,459 Interest and fees on loans (914) (419) Interest on FHLB and other borrowings 43,860 5,040 (10,408) (1,202) Income tax expense $ 33,452 $ 3,838 Net of tax Defined Benefit Plan Adjustment $ 3,553 $ (2,301) (2) (842) 547 Income tax (expense) benefit $ 2,711 $ (1,754) Net of tax Unamortized Impairment Losses on Debt Securities Held to Maturity $ (183) $ (155) Interest on debt securities held to maturity 43 37 Income tax benefit $ (140) $ (118) Net of tax (1) Amounts in parentheses indicate debits to the Unaudited Condensed Consolidated Statements of Income. (2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 17, Benefit Plans, in the Notes to the December 31, 2020, Consolidated Financial Statements for additional details).

Supplemental Disclosure for Sta

Supplemental Disclosure for Statement of Cash Flows	3 Months Ended
	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosure for Statement of Cash Flows	Supplemental Disclosure for Statement of Cash Flows The following table presents the Company’s supplemental disclosures for statement of cash flows. Three Months Ended March 31, 2021 2020 (In Thousands) Supplemental disclosures of cash flow information: Interest paid $ 9,992 $ 207,334 Net income taxes (refunded) paid (1,955) 7,208 Operating cash flows from operating leases 12,923 12,499 Operating cash flows from finance leases 119 140 Financing cash flows from finance leases 444 414 Supplemental schedule of noncash activities: Transfer of loans and loans held for sale to OREO $ 1,789 $ 5,735 Right-of-use assets obtained in exchange for lease obligations- operating leases 5,145 17,568 The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Company’s Unaudited Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Company's Unaudited Condensed Consolidated Statements of Cash Flows. Three Months Ended March 31, 2021 2020 (In Thousands) Cash and cash equivalents $ 15,142,724 $ 5,513,268 Restricted cash in other assets 385,013 306,798 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 15,527,737 $ 5,820,066 Restricted cash primarily represents cash collateral related to the Company's derivatives as well as amounts restricted for regulatory purposes related to BSI and BBVA Transfer Holdings, Inc. Restricted cash is included in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s operating segments are based on the Company’s organizational structure. Each segment reflects the manner in which financial information is evaluated by management. The operating segment results include certain overhead allocations and intercompany transactions. All intercompany transactions have been eliminated to determine the consolidated balances. The Company operates primarily in the United States, and, accordingly, revenue and assets outside the United States are not material. There are no individual customers whose attributable revenues exceed 10% of consolidated revenue. The following tables present the segment information for the Company’s existing segments. Three Months Ended March 31, 2021 Commercial Banking and Wealth Retail Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 312,218 $ 256,937 $ 39,204 $ 113,769 $ (57,860) $ 664,268 Allocated (credit) provision for credit losses (62,903) (3,980) (40,987) 39 (12,311) (120,142) Noninterest income 65,563 115,713 43,081 8,212 71,132 303,701 Noninterest expense 149,943 307,550 49,465 4,558 107,474 618,990 Net income (loss) before income tax expense (benefit) 290,741 69,080 73,807 117,384 (81,891) 469,121 Income tax expense (benefit) 61,056 14,507 15,499 24,651 (32,053) 83,660 Net income (loss) 229,685 54,573 58,308 92,733 (49,838) 385,461 Less: net income attributable to noncontrolling interests 179 — — 387 15 581 Net income (loss) attributable to BBVA USA Bancshares, Inc. $ 229,506 $ 54,573 $ 58,308 $ 92,346 $ (49,853) $ 384,880 Average assets $ 42,593,214 $ 17,472,177 $ 7,636,021 $ 31,172,166 $ 6,266,623 $ 105,140,201 Three Months Ended March 31, 2020 Commercial Banking and Wealth Retail Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 291,282 $ 265,462 $ 33,828 $ (17,691) $ 16,574 $ 589,455 Allocated provision (credit) for credit losses 130,982 129,140 83,132 (195) 13,932 356,991 Noninterest income 68,535 130,702 40,135 26,202 68,668 334,242 Noninterest expense 174,101 305,257 61,395 4,046 2,264,261 2,809,060 Net income (loss) before income tax expense (benefit) 54,734 (38,233) (70,564) 4,660 (2,192,951) (2,242,354) Income tax expense (benefit) 11,494 (8,029) (14,819) 979 5,306 (5,069) Net income (loss) 43,240 (30,204) (55,745) 3,681 (2,198,257) (2,237,285) Less: net income (loss) attributable to noncontrolling interests 116 — — 396 (11) 501 Net income (loss) attributable to BBVA USA Bancshares, Inc. $ 43,124 $ (30,204) $ (55,745) $ 3,285 $ (2,198,246) $ (2,237,786) Average assets $ 41,090,411 $ 18,632,122 $ 8,272,714 $ 20,254,258 $ 8,106,608 $ 96,356,113 The financial information presented was derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. This information is based on internal management accounting policies that have been developed to reflect the underlying economics of the businesses. These policies address the methodologies applied and include policies related to funds transfer pricing, cost allocations and capital allocations. Funds transfer pricing was used in the determination of net interest income earned primarily on loans and deposits. The method employed for funds transfer pricing is a matched funding concept whereby lines of business which are fund providers are credited and those that are fund users are charged based on maturity, prepayment and/or repricing characteristics applied on an instrument level. Provision for loan losses is allocated to each segment based on internal management accounting policies for the allowance for loan losses and the related provision which differs from the policies for consolidated purposes. The difference between the consolidated provision for credit losses and the segments' provision for credit losses is reflected in Corporate Support and Other and reflects a current year revision in policy. Costs for centrally managed operations are generally allocated to the lines of business based on the utilization of services provided or other appropriate indicators. Revenue is recorded in the business segment responsible for the related product or service. Fee sharing is recorded to allocate portions of such revenue to other business segments involved in selling to, or providing services to, customers. Results of operations for the business segments reflect these fee sharing allocations. Capital is allocated to the lines of business based upon the underlying risks in each business considering economic and regulatory capital standards. The development and application of these methodologies is a dynamic process. Accordingly, prior period financial results have been revised to reflect management accounting enhancements and changes in the Company's organizational structure. The 2020 segment information has been revised to conform to the 2021 presentation. In addition, unlike financial accounting, there is no authoritative literature for management accounting similar to U.S. GAAP. Consequently, reported results are not necessarily comparable with those presented by other financial institutions.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company enters into various transactions with BBVA that affect the Company’s business and operations. The following discloses the significant transactions between the Company and BBVA during 2021 and 2020. The Company believes all of the transactions entered into between the Company and BBVA were transacted on terms that were no more or less beneficial to the Company than similar transactions entered into with unrelated market participants, including interest rates and transaction costs. The Company foresees executing similar transactions with BBVA in the future. Derivatives The Company has entered into various derivative contracts as noted below with BBVA as the upstream counterparty. The total notional amount of outstanding derivative contracts between the Company and BBVA are $3.1 billion and $3.2 billion as of March 31, 2021 and December 31, 2020, respectively. The net fair value of outstanding derivative contracts between the Company and BBVA are detailed below. March 31, 2021 December 31, 2020 (In Thousands) Derivative contracts: Fair value hedges $ (375) $ (748) Cash flow hedges (64) (19) Free-standing derivatives not designated as hedging instruments (29,565) (44,958) Securities Purchased Under Agreements to Resell/ Securities Sold Under Agreements to Repurchase The Company enters into agreements with BBVA as the counterparty under which it purchases/sells securities subject to an obligation to resell/repurchase the same or similar securities. The following represents the amount of securities purchased under agreement to resell and securities sold under agreement to repurchase where BBVA is the counterparty. March 31, 2021 December 31, 2020 (In Thousands) Securities purchased under agreements to resell $ 928,235 $ 186,568 Securities sold under agreements to repurchase 3,291 6,426 Borrowings BSI, a wholly owned subsidiary of the Company, had a $420 million revolving note and cash subordination agreement with BBVA that was executed on March 16, 2012, with an original maturity date of March 16, 2018. On March 16, 2017, the agreement was amended to increase the available amount to $450 million and the maturity date was extended to March 16, 2023. On March 16, 2017, BSI entered into an uncommitted demand facility agreement with BBVA for a revolving loan facility up to $1 billion to be used for trade settlement purposes. BSI has not drawn against this facility in 2021. At both March 31, 2021 and December 31, 2020 there was no amount outstanding under the revolving note and cash subordination agreement. There was $29 thousand in interest expense related to these agreements for the three months ended March 31, 2021 and $55 thousand interest expense for the three months ended March 31, 2020 and are included in interest on other short-term borrowings within the Company's Unaudited Condensed Consolidated Statements of Income. Service and Referral Agreements The Company and its affiliates entered into or were subject to various service and referral agreements with BBVA and its affiliates. Each of the agreements was done in the ordinary course of business and on market terms. Income associated with these agreements was $5.0 million and $4.1 million for the three months ended March 31, 2021 and 2020, respectively, and is recorded as a component of noninterest income within the Company's Unaudited Condensed Consolidated Statements of Income. Expenses associated with these agreements was $10.5 million and $9.9 million for the three months ended March 31, 2021 and 2020, respectively, and is recorded as a component of noninterest expense within the Company's Unaudited Condensed Consolidated Statements of Income. Series A Preferred Stock BBVA is the sole holder of the Series A Preferred Stock that the Company issued in December 2015. At both March 31, 2021 and December 31, 2020, the carrying amount of the Series A Preferred Stock was approximately $229 million. During the three months ended March 31, 2021 and 2020, the Company paid $3.1 million and $4.2 million, respectively, of preferred stock dividends to BBVA.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Use of Estimates in the Preparation of Consolidated Financial Statements	Use of Estimates in the Preparation of Consolidated Financial StatementsThe preparation of consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period, the most significant of which relate to the allowance for credit losses and goodwill impairment. Actual results could differ from those estimates. The extent to which the COVID-19 pandemic impacts the results of operations and financial condition, will depend on future developments, which are highly uncertain and cannot be predicted.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards Income Taxes In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes . The amendments in this ASU simplify the accounting for income taxes. This ASU is effective for fiscal years beginning after December 15, 2020, and for interim periods within those fiscal years. The adoption of this standard did not have a material impact on the financial condition and results of operations of the Company. Reference Rate Reform In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform - Facilitation of the Effects of Reference Rate Reform on Financial Reporting . The amendments in this ASU provide optional guidance for a limited period of time to ease the potential burden in accounting for or recognizing the effects of reference rate reform on financial reporting. The amendments in this ASU provide optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU 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 the amendments 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. This ASU is effective as of March 12, 2020 through December 31, 2022. The adoption of this standard had no impact as the Company has not modified any contracts, hedging relationships, or other transactions.
Debt Securities	The investments held within the states and political subdivision caption of debt securities held to maturity relate to private placement transactions underwritten as loans by the Company but that meet the definition of a security within ASC Topic 320, Investments – Debt Securities .
Derivatives and Hedging	The Company has made an accounting policy decision not to offset derivative fair value amounts under master netting agreements.
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 are governed by a MRA. Under the terms of the MRA, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the nondefaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted. These amounts are limited to the contract asset/liability balance, and accordingly, do not include excess collateral received or pledged. The Company offsets the assets and liabilities under netting arrangements for the balance sheet presentation of securities purchased under agreements to resell and securities sold under agreements to repurchase provided certain criteria are met that permit balance sheet netting.

Debt Securities Available for_2

Debt Securities Available for Sale and Debt Securities Held to Maturity (Tables)	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of adjusted cost and approximate fair value of investment securities available for sale and investments held to maturity	The following tables present the adjusted cost and approximate fair value of debt securities available for sale and debt securities held to maturity. March 31, 2021 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 2,041,182 $ 37,301 $ 14,273 $ 2,064,210 Agency mortgage-backed securities 774,456 25,452 2,104 797,804 Agency collateralized mortgage obligations 2,503,150 42,993 631 2,545,512 States and political subdivisions 545 16 — 561 Total $ 5,319,333 $ 105,762 $ 17,008 $ 5,408,087 Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 2,550,157 $ 93,298 $ 23,886 $ 2,619,569 Agency mortgage-backed securities 921,354 — 17,323 904,031 Collateralized mortgage obligations: Agency 8,353,460 125,129 44,685 8,433,904 Non-agency 27,319 6,047 53 33,313 Asset-backed securities and other 45,437 1,472 419 46,490 States and political subdivisions (1) 444,236 16,387 918 459,705 Total $ 12,341,963 $ 242,333 $ 87,284 $ 12,497,012 (1) The Company recorded an allowance of $2 million at March 31, 2021, related to state and political subdivisions, which is not included in the table above. December 31, 2020 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 2,115,915 $ 45,168 $ 14,179 $ 2,146,904 Agency mortgage-backed securities 834,640 32,103 1,095 865,648 Agency collateralized mortgage obligations 2,681,210 50,811 290 2,731,731 States and political subdivisions 617 19 — 636 Total $ 5,632,382 $ 128,101 $ 15,564 $ 5,744,919 Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 1,291,900 $ 112,968 $ — $ 1,404,868 Agency mortgage-backed securities 570,115 2,491 — 572,606 Collateralized mortgage obligations: Agency 8,144,522 147,176 27,234 8,264,464 Non-agency 29,186 5,972 209 34,949 Asset-backed securities and other 48,790 1,217 2,681 47,326 States and political subdivisions (1) 467,610 21,047 3,409 485,248 Total $ 10,552,123 $ 290,871 $ 33,533 $ 10,809,461
Schedule of fair value and gross unrealized losses of available for sale and held to maturity securities that were in a loss position	The following tables disclose the fair value and the gross unrealized losses of the Company’s available for sale debt securities that were in a loss position at March 31, 2021 and December 31, 2020, for which an allowance for credit losses has not been recorded. This information is aggregated by investment category and the length of time the individual securities have been in an unrealized loss position. March 31, 2021 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 28,410 $ 790 $ 319,805 $ 13,483 $ 348,215 $ 14,273 Agency mortgage-backed securities 32,699 1,286 34,710 818 67,409 2,104 Agency collateralized mortgage obligations 416,524 501 102,578 130 519,102 631 Total $ 477,633 $ 2,577 $ 457,093 $ 14,431 $ 934,726 $ 17,008 December 31, 2020 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Debt securities available for sale: U.S. Treasury and other U.S. government agencies $ 6,041 $ 60 $ 335,296 $ 14,119 $ 341,337 $ 14,179 Agency mortgage-backed securities 25,710 299 35,326 796 61,036 1,095 Agency collateralized mortgage obligations 96,498 114 162,028 176 258,526 290 Total $ 128,249 $ 473 $ 532,650 $ 15,091 $ 660,899 $ 15,564
Schedule of allowance for credit losses for debt securities held to maturity	The following table presents the activity in the allowance for debt securities held to maturity losses. Three Months Ended March 31, 2021 2020 (In Thousands) Allowance for debt securities held to maturity losses: Balance at beginning of period $ 2,178 $ — Impact of adopting ASC 326 — 1,847 Beginning balance, after adoption of ASC 326 2,178 1,847 (Credit) provision for credit losses (209) 45 Securities charged off — — Recoveries — — Balance at end of period $ 1,969 $ 1,892
Schedule of debt securities held to maturity through credit ratings	The Company monitors the credit quality of its HTM debt securities through credit ratings. The following tables present the amortized cost of HTM debt securities, aggregated by credit quality indicator. March 31, 2021 Range of Ratings AAA AA+ / A - BBB+ / B- CCC+ / C D NR Total (In Thousands) Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 2,550,157 $ — $ — $ — $ — $ — $ 2,550,157 Agency mortgage-backed securities 921,354 — — — — — 921,354 Collateralized mortgage obligations: Agency 8,353,460 — — — — — 8,353,460 Non-agency 224 6,357 9,770 3,144 771 7,053 27,319 Asset-backed securities and other — 44,870 183 384 — — 45,437 States and political subdivisions (1) — 236,151 208,085 — — — 444,236 $ 11,825,195 $ 287,378 $ 218,038 $ 3,528 $ 771 $ 7,053 $ 12,341,963 (1) The Company recorded an allowance of $2 million at March 31, 2021, related to state and political subdivisions, which is not included in the table above. December 31, 2020 Range of Ratings AAA AA+ / A - BBB+ / B- CCC+ / C D NR Total (In Thousands) Debt securities held to maturity: U.S. Treasury and other U.S. government agencies $ 1,291,900 $ — $ — $ — $ — $ — $ 1,291,900 Agency mortgage-backed securities 570,115 — — — — — 570,115 Collateralized mortgage obligations: Agency 8,144,522 — — — — — 8,144,522 Non-agency 278 6,840 10,517 5,462 2,533 3,556 29,186 Asset-backed securities and other — 48,127 200 463 — — 48,790 States and political subdivisions (1) — 246,210 221,400 — — — 467,610 $ 10,006,815 $ 301,177 $ 232,117 $ 5,925 $ 2,533 $ 3,556 $ 10,552,123
Schedule of investments classified by contractual maturity date	The contractual maturities of the securities portfolios are presented in the following table. March 31, 2021 Amortized Cost Fair Value (In Thousands) Debt securities available for sale: Maturing within one year $ 250,000 $ 250,000 Maturing after one but within five years 1,394,623 1,430,793 Maturing after five but within ten years 4,755 4,828 Maturing after ten years 392,349 379,150 2,041,727 2,064,771 Agency mortgage-backed securities and agency collateralized mortgage obligations 3,277,606 3,343,316 Total $ 5,319,333 $ 5,408,087 Debt securities held to maturity: Maturing within one year $ 11,240 $ 11,265 Maturing after one but within five years 1,392,538 1,486,375 Maturing after five but within ten years 1,546,716 1,537,655 Maturing after ten years 89,336 90,469 3,039,830 3,125,764 Agency mortgage-backed securities and agency and non-agency collateralized mortgage obligations 9,302,133 9,371,248 Total $ 12,341,963 $ 12,497,012
Schedule of gross realized gains and losses	The gross realized gains and losses recognized on sales of debt securities available for sale are shown in the table below. Three Months Ended March 31, 2021 2020 (In Thousands) Gross gains $ — $ 19,139 Gross losses — — Net realized gains $ — $ 19,139

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule of composition of loan portfolio	The following table presents the composition of the loan portfolio. March 31, 2021 December 31, 2020 (In Thousands) Commercial loans: Commercial, financial and agricultural $ 25,969,245 $ 26,605,142 Real estate – construction 2,396,004 2,498,331 Commercial real estate – mortgage 13,412,272 13,565,314 Total commercial loans 41,777,521 42,668,787 Consumer loans: Residential real estate – mortgage 12,823,641 13,327,774 Equity lines of credit 2,318,208 2,394,894 Equity loans 165,209 179,762 Credit card 812,242 881,702 Consumer direct 1,797,085 1,929,723 Consumer indirect 4,266,336 4,177,125 Total consumer loans 22,182,721 22,890,980 Total loans $ 63,960,242 $ 65,559,767
Disclosure of activity in allowance for loan losses during year	The following table, which excludes loans held for sale, presents a summary of the activity in the allowance for loan losses. The portion of the allowance that has not been identified by the Company as related to specific loan categories has been allocated to the individual loan categories on a pro rata basis for purposes of the table below: Commercial, Financial and Agricultural Commercial Real Estate (1) Residential Real Estate (2) Consumer (3) Total (In Thousands) Three months ended March 31, 2021 Allowance for loan losses: Beginning balance $ 658,228 $ 311,092 $ 214,469 $ 495,685 $ 1,679,474 Provision (credit) for loan losses (84,950) (30,150) (15,382) 10,549 (119,933) Loans charged-off (12,942) (44) (1,747) (76,628) (91,361) Loan recoveries 11,735 177 1,093 17,724 30,729 Net (charge-offs) recoveries (1,207) 133 (654) (58,904) (60,632) Ending balance $ 572,071 $ 281,075 $ 198,433 $ 447,330 $ 1,498,909 Three Months Ended March 31, 2020 Allowance for loan losses: Beginning balance, prior to adoption of ASC 326 $ 408,197 $ 118,633 $ 99,089 $ 295,074 $ 920,993 Impact of adopting ASC 326 18,389 (35,034) 47,390 154,186 184,931 Beginning balance, after adoption of ASC 326 426,586 83,599 146,479 449,260 1,105,924 Provision for loan losses 140,413 24,548 7,032 184,953 356,946 Loan charge-offs (24,207) (87) (1,999) (115,866) (142,159) Loan recoveries 5,193 173 1,423 23,572 30,361 Net (charge-offs) recoveries (19,014) 86 (576) (92,294) (111,798) Ending balance $ 547,985 $ 108,233 $ 152,935 $ 541,919 $ 1,351,072 (1) Includes commercial real estate – mortgage and real estate – construction loans. (2) Includes residential real estate – mortgage, equity lines of credit and equity loans. (3) Includes credit card, consumer direct and consumer indirect loans.
Schedule of nonaccrual financing receivables	The following table presents information on nonaccrual loans, by loan class at March 31, 2021 and December 31, 2020. March 31, 2021 December 31, 2020 Nonaccrual Nonaccrual With No Recorded Allowance Nonaccrual Nonaccrual With No Recorded Allowance Commercial, financial and agricultural $ 529,703 $ 172,832 $ 540,741 $ 93,614 Real estate – construction 25,265 — 25,316 — Commercial real estate – mortgage 418,935 88,910 442,137 77,629 Residential real estate – mortgage 235,441 — 235,463 — Equity lines of credit 45,744 — 42,606 — Equity loans 8,844 — 10,167 — Credit card — — — — Consumer direct 13,098 — 10,087 — Consumer indirect 23,852 — 24,713 — Total loans $ 1,300,882 $ 261,742 $ 1,331,230 $ 171,243
Schedule of credit quality indicators associated with the Company's loans	The following tables, which exclude loans held for sale, illustrate the credit quality indicators associated with the Company’s loans, by loan class. Commercial March 31, 2021 Recorded Investment of Term Loans by Origination Year 2021 2020 2019 2018 2017 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Commercial, financial and agricultural Pass $ 1,050,720 $ 5,353,169 $ 2,656,762 $ 1,832,641 $ 2,817,125 $ 3,598,179 $ 6,359,264 $ — $ 23,667,860 Special Mention 63,645 15,593 98,900 216,057 86,212 125,224 471,135 — 1,076,766 Substandard 4,893 68,342 99,186 81,450 71,320 215,564 548,331 — 1,089,086 Doubtful — 21,308 11,726 1,789 23,150 34,609 42,951 — 135,533 Total commercial, financial and agricultural $ 1,119,258 $ 5,458,412 $ 2,866,574 $ 2,131,937 $ 2,997,807 $ 3,973,576 $ 7,421,681 $ — $ 25,969,245 Real estate - construction Pass $ 56,927 $ 554,067 $ 755,562 $ 584,592 $ 151,696 $ 75,301 $ 149,250 $ — $ 2,327,395 Special Mention — — 5,199 8,395 19,506 297 — — 33,397 Substandard — 6,218 6,121 726 18,020 4,127 — — 35,212 Doubtful — — — — — — — — — Total real estate - construction $ 56,927 $ 560,285 $ 766,882 $ 593,713 $ 189,222 $ 79,725 $ 149,250 $ — $ 2,396,004 Commercial real estate - mortgage Pass $ 237,099 $ 1,535,357 $ 2,708,280 $ 3,347,413 $ 1,423,688 $ 2,606,898 $ 178,890 $ — $ 12,037,625 Special Mention — 28,911 113,096 192,868 35,808 260,781 30,461 — 661,925 Substandard — 58,450 105,425 114,971 103,119 312,068 12,949 — 706,982 Doubtful — — — — 1,836 3,904 — — 5,740 Total commercial real estate - mortgage $ 237,099 $ 1,622,718 $ 2,926,801 $ 3,655,252 $ 1,564,451 $ 3,183,651 $ 222,300 $ — $ 13,412,272 Commercial December 31, 2020 Recorded Investment of Term Loans by Origination Year 2020 2019 2018 2017 2016 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Commercial, financial and agricultural Pass $ 5,784,167 $ 2,691,532 $ 1,986,737 $ 3,003,653 $ 754,848 $ 3,030,800 $ 6,861,548 $ — $ 24,113,285 Special Mention 78,988 166,896 193,552 107,194 26,025 102,208 685,822 — 1,360,685 Substandard 38,516 66,725 69,752 96,059 82,947 179,285 499,317 — 1,032,601 Doubtful 16,286 12,248 5,476 709 7,395 5,085 51,372 — 98,571 Total commercial, financial and agricultural $ 5,917,957 $ 2,937,401 $ 2,255,517 $ 3,207,615 $ 871,215 $ 3,317,378 $ 8,098,059 $ — $ 26,605,142 Real estate - construction Pass $ 429,483 $ 785,835 $ 710,403 $ 271,229 $ 44,565 $ 38,470 $ 125,184 $ — $ 2,405,169 Special Mention — 9,015 8,414 — 24,059 301 18,223 — 60,012 Substandard 3,973 6,210 551 18,152 — 4,264 — — 33,150 Doubtful — — — — — — — — — Total real estate - construction $ 433,456 $ 801,060 $ 719,368 $ 289,381 $ 68,624 $ 43,035 $ 143,407 $ — $ 2,498,331 Commercial real estate - mortgage Pass $ 1,571,217 $ 2,796,409 $ 3,430,264 $ 1,371,053 $ 777,906 $ 2,113,980 $ 222,864 $ — $ 12,283,693 Special Mention 40,501 131,400 190,140 36,834 147,037 110,279 3,996 — 660,187 Substandard 44,201 34,749 106,067 114,290 112,976 195,821 6,630 — 614,734 Doubtful — — — — 2,758 3,942 — — 6,700 Total commercial real estate - mortgage $ 1,655,919 $ 2,962,558 $ 3,726,471 $ 1,522,177 $ 1,040,677 $ 2,424,022 $ 233,490 $ — $ 13,565,314 Consumer March 31, 2021 Recorded Investment of Term Loans by Origination Year 2021 2020 2019 2018 2017 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Residential real estate - mortgage Performing $ 802,011 $ 3,776,523 $ 1,717,121 $ 740,423 $ 805,765 $ 4,704,304 $ — $ — $ 12,546,147 Nonperforming — 5,313 24,607 22,101 23,232 202,241 — — 277,494 Total residential real estate - mortgage $ 802,011 $ 3,781,836 $ 1,741,728 $ 762,524 $ 828,997 $ 4,906,545 $ — $ — $ 12,823,641 Equity lines of credit Performing $ — $ — $ — $ — $ — $ — $ 2,260,999 $ 9,493 $ 2,270,492 Nonperforming — — — — — — 47,569 147 47,716 Total equity lines of credit $ — $ — $ — $ — $ — $ — $ 2,308,568 $ 9,640 $ 2,318,208 Equity loans Performing $ 5,681 $ 10,588 $ 9,130 $ 7,946 $ 3,545 $ 119,168 $ — $ — $ 156,058 Nonperforming — 55 107 516 133 8,340 — — 9,151 Total equity loans $ 5,681 $ 10,643 $ 9,237 $ 8,462 $ 3,678 $ 127,508 $ — $ — $ 165,209 Credit card Performing $ — $ — $ — $ — $ — $ — $ 789,395 $ — $ 789,395 Nonperforming — — — — — — 22,847 — 22,847 Total credit card $ — $ — $ — $ — $ — $ — $ 812,242 $ — $ 812,242 Consumer direct Performing $ 156,787 $ 462,219 $ 351,468 $ 283,514 $ 79,054 $ 43,284 $ 399,322 $ — $ 1,775,648 Nonperforming — 4,694 4,131 6,495 1,912 757 3,448 — 21,437 Total consumer direct $ 156,787 $ 466,913 $ 355,599 $ 290,009 $ 80,966 $ 44,041 $ 402,770 $ — $ 1,797,085 Consumer indirect Performing $ 568,797 $ 1,667,436 $ 979,931 $ 640,659 $ 259,239 $ 121,830 $ — $ — $ 4,237,892 Nonperforming — 2,841 6,991 9,376 4,968 4,268 — — 28,444 Total consumer indirect $ 568,797 $ 1,670,277 $ 986,922 $ 650,035 $ 264,207 $ 126,098 $ — $ — $ 4,266,336 Consumer December 31, 2020 Recorded Investment of Term Loans by Origination Year 2020 2019 2018 2017 2016 Prior Recorded Investment of Revolving Loans Recorded Investment of Revolving Loans Converted to Term Loans Total (In Thousands) Residential real estate - mortgage Performing $ 3,881,274 $ 2,013,356 $ 883,919 $ 956,310 $ 1,109,560 $ 4,201,849 $ — $ — $ 13,046,268 Nonperforming 4,468 21,702 21,424 21,167 24,964 187,781 — — 281,506 Total residential real estate - mortgage $ 3,885,742 $ 2,035,058 $ 905,343 $ 977,477 $ 1,134,524 $ 4,389,630 $ — $ — $ 13,327,774 Equity lines of credit Performing $ — $ — $ — $ — $ — $ — $ 2,338,907 $ 10,757 $ 2,349,664 Nonperforming — — — — — — 45,079 151 45,230 Total equity lines of credit $ — $ — $ — $ — $ — $ — $ 2,383,986 $ 10,908 $ 2,394,894 Equity loans Performing $ 11,894 $ 10,684 $ 8,624 $ 3,960 $ 3,242 $ 130,600 $ — $ — $ 169,004 Nonperforming 789 375 484 134 — 8,976 — — 10,758 Total equity loans $ 12,683 $ 11,059 $ 9,108 $ 4,094 $ 3,242 $ 139,576 $ — $ — $ 179,762 Credit card Performing $ — $ — $ — $ — $ — $ — $ 859,749 $ — $ 859,749 Nonperforming — — — — — — 21,953 — 21,953 Total credit card $ — $ — $ — $ — $ — $ — $ 881,702 $ — $ 881,702 Consumer direct Performing $ 547,417 $ 426,921 $ 349,518 $ 97,085 $ 43,170 $ 14,617 $ 432,167 $ — $ 1,910,895 Nonperforming 1,220 3,878 7,995 2,325 642 189 2,579 — 18,828 Total consumer direct $ 548,637 $ 430,799 $ 357,513 $ 99,410 $ 43,812 $ 14,806 $ 434,746 $ — $ 1,929,723 Consumer indirect Performing $ 1,817,720 $ 1,112,510 $ 745,483 $ 305,658 $ 92,924 $ 73,051 $ — $ — $ 4,147,346 Nonperforming 1,821 6,759 10,116 5,791 3,076 2,216 — — 29,779 Total consumer indirect $ 1,819,541 $ 1,119,269 $ 755,599 $ 311,449 $ 96,000 $ 75,267 $ — $ — $ 4,177,125
Schedule of past due loans	The following tables present an aging analysis of the Company’s past due loans, excluding loans classified as held for sale. March 31, 2021 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due, Nonaccrual or TDR Not Past Due, Nonaccrual or TDR Total (In Thousands) Commercial, financial and agricultural $ 17,433 $ 19,078 $ 12,609 $ 529,703 $ 77,466 $ 656,289 $ 25,312,956 $ 25,969,245 Real estate – construction 2,538 — 532 25,265 142 28,477 2,367,527 2,396,004 Commercial real estate – mortgage 703 253 7,790 418,935 26,746 454,427 12,957,845 13,412,272 Residential real estate – mortgage 40,315 19,696 41,590 235,441 53,568 390,610 12,433,031 12,823,641 Equity lines of credit 8,325 2,642 1,972 45,744 — 58,683 2,259,525 2,318,208 Equity loans 665 223 134 8,844 19,326 29,192 136,017 165,209 Credit card 8,378 6,442 22,847 — — 37,667 774,575 812,242 Consumer direct 17,028 9,438 8,339 13,098 23,041 70,944 1,726,141 1,797,085 Consumer indirect 30,024 8,513 4,592 23,852 — 66,981 4,199,355 4,266,336 Total loans $ 125,409 $ 66,285 $ 100,405 $ 1,300,882 $ 200,289 $ 1,793,270 $ 62,166,972 $ 63,960,242 December 31, 2020 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due, Nonaccrual or TDR Not Past Due, Nonaccrual or TDR Total (In Thousands) Commercial, financial and agricultural $ 15,862 $ 22,569 $ 35,472 $ 540,741 $ 17,686 $ 632,330 $ 25,972,812 $ 26,605,142 Real estate – construction 3,595 174 532 25,316 145 29,762 2,468,569 2,498,331 Commercial real estate – mortgage 2,113 2,004 1,104 442,137 910 448,268 13,117,046 13,565,314 Residential real estate – mortgage 49,445 20,694 45,761 235,463 53,380 404,743 12,923,031 13,327,774 Equity lines of credit 11,108 4,305 2,624 42,606 — 60,643 2,334,251 2,394,894 Equity loans 1,417 243 317 10,167 19,606 31,750 148,012 179,762 Credit card 12,147 10,191 21,953 — — 44,291 837,411 881,702 Consumer direct 24,076 17,550 8,741 10,087 23,163 83,617 1,846,106 1,929,723 Consumer indirect 47,174 14,951 5,066 24,713 — 91,904 4,085,221 4,177,125 Total loans $ 166,937 $ 92,681 $ 121,570 $ 1,331,230 $ 114,890 $ 1,827,308 $ 63,732,459 $ 65,559,767
Schedule of troubled debt restructuring loans and subsequent defaults on restructured loans	The following table presents an analysis of the types of loans that were restructured and classified as TDRs, excluding loans classified as held for sale. Three Months Ended March 31, 2021 Three Months Ended March 31, 2020 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 10 $ 109,107 10 $ 41,238 Real estate – construction 1 18,056 — — Commercial real estate – mortgage 10 196,993 2 1,740 Residential real estate – mortgage 21 6,542 8 844 Equity lines of credit 3 154 1 36 Equity loans 5 554 1 192 Credit card — — — — Consumer direct 37 1,527 89 4,762 Consumer indirect — — — — The following table provides a summary of initial subsequent defaults that occurred within one year of the restructure date. The tables exclude loans classified as held for sale as of period-end and includes loans no longer in default as of period-end. Three Months Ended March 31, 2021 Three Months Ended March 31, 2020 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction — — — — Commercial real estate – mortgage — — — — Residential real estate – mortgage 2 855 1 84 Equity lines of credit — — — — Equity loans 1 43 — — Credit card — — — — Consumer direct — — 4 217 Consumer indirect — — — —

Loan Sales and Servicing (Table

Loan Sales and Servicing (Tables)	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Schedule of loan sales and residential mortgage servicing rights	The following table summarizes the Company's sales of loans originated for sale in the secondary market. Three Months Ended March 31, 2021 2020 (In Thousands) Residential real estate loans originated for sale in the secondary market sold (1) $ 347,513 $ 203,830 Net gains recognized on sales of residential real estate loans originated for sale in the secondary market (2) 18,347 8,775 Servicing fees recognized (2) 2,434 2,608 (1) The Company has retained servicing responsibilities for all loans sold that were originated for sale in the secondary market. (2) Recorded as a component of mortgage banking income in the Company's Unaudited Condensed Consolidated Statements of Income. The following table provides the recorded balance of loans sold with retained servicing and the related MSRs. March 31, 2021 December 31, 2020 (In Thousands) Recorded balance of residential real estate mortgage loans sold with retained servicing (1) $ 4,338,556 $ 4,425,180 MSRs (2) 41,432 30,665 (1) These loans are not included in loans on the Company's Unaudited Condensed Consolidated Balance Sheets. (2) Recorded under the fair value method and included in other assets on the Company's Unaudited Condensed Consolidated Balance Sheets. The following table is an analysis of the activity in the Company’s MSRs. Three Months Ended March 31, 2021 2020 (In Thousands) Carrying value, at beginning of period $ 30,665 $ 42,022 Additions 3,985 1,671 Increase (decrease) in fair value: Due to changes in valuation inputs or assumptions 9,832 (10,140) Due to other changes in fair value (1) (3,050) (2,321) Carrying value, at end of period $ 41,432 $ 31,232 (1) Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time.
Schedule of sensitivity of current fair value of residential real estate mortgage servicing rights	At March 31, 2021 and December 31, 2020, the sensitivity of the current fair value of the residential MSRs to immediate 10% and 20% adverse changes in key economic assumptions are included in the following table: March 31, 2021 December 31, 2020 (Dollars in Thousands) Fair value of MSRs $ 41,432 $ 30,665 Composition of residential loans serviced for others: Fixed rate mortgage loans 98.7 % 98.5 % Adjustable rate mortgage loans 1.3 1.5 Total 100.0 % 100.0 % Weighted average life (in years) 4.4 3.6 Prepayment speed: 29.0 % 30.4 % Effect on fair value of a 10% increase $ (1,687) $ (1,620) Effect on fair value of a 20% increase (3,797) (3,585) Weighted average option adjusted spread: 6.2 % 6.2 % Effect on fair value of a 10% increase $ (1,009) $ (656) Effect on fair value of a 20% increase (1,974) (1,285)

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of notional amount and fair value of derivative instruments	The following table reflects the notional amount and fair value of derivative instruments included on the Company’s Unaudited Condensed Consolidated Balance Sheets on a gross basis. March 31, 2021 December 31, 2020 Fair Value Fair Value Notional Amount Derivative Assets (1) Derivative Liabilities (2) Notional Amount Derivative Assets (1) Derivative Liabilities (2) (In Thousands) Derivatives designated as hedging instruments: Fair value hedges: Interest rate swaps related to long-term debt $ 3,496,086 $ 9,656 $ 375 $ 3,496,086 $ 11,635 $ 748 Total fair value hedges 9,656 375 11,635 748 Cash flow hedges: Interest rate contracts: Swaps related to commercial loans 10,000,000 — — 10,000,000 — — Swaps related to FHLB advances 120,000 — 1,181 120,000 — 2,108 Foreign currency contracts: Forwards related to currency fluctuations 3,088 — 64 4,102 — 19 Total cash flow hedges — 1,245 — 2,127 Total derivatives designated as hedging instruments $ 9,656 $ 1,620 $ 11,635 $ 2,875 Free-standing derivatives not designated as hedging instruments: Interest rate contracts: Forward contracts related to held for sale mortgages $ 834,280 $ 7,726 $ 573 $ 861,061 $ 1,184 $ 5,193 Interest rate lock commitments 421,906 8,091 151 520,481 17,897 — Equity contracts: Purchased equity option related to equity-linked CDs 30,219 304 — 40,253 574 — Written equity option related to equity-linked CDs 24,259 — 244 32,507 — 468 Foreign exchange contracts: Forwards and swaps related to commercial loans 471,739 5,881 1,746 578,484 1,635 7,424 Spots related to commercial loans 79,755 24 34 47,564 124 38 Swap associated with sale of Visa, Inc. Class B shares 183,292 — 6,408 189,352 — 6,517 Futures contracts (3) — — — 200,000 — — Trading account assets and liabilities: Interest rate contracts for customers 37,158,642 422,427 123,551 38,305,700 616,566 128,831 Foreign exchange contracts for customers 1,664,768 37,221 35,193 1,448,123 36,741 34,598 Total trading account assets and liabilities 459,648 158,744 653,307 163,429 Total free-standing derivative instruments not designated as hedging instruments $ 481,674 $ 167,900 $ 674,721 $ 183,069 (1) Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets. (2) Derivative liabilities are recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets. (3) Changes in fair value are cash settled daily; therefore, there is no ending balance at any given reporting period.
Schedule of hedging derivative instruments	The following table presents the effect of hedging derivative instruments on the Company’s Unaudited Condensed Consolidated Statements of Income. Interest Income Interest Expense Interest and fees on loans Interest on FHLB and other borrowings (In Thousands) Three Months Ended March 31, 2021 Total amounts presented in the unaudited condensed consolidated statements of income $ 606,407 $ 14,516 Gains (losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements and amortization on derivatives $ — $ 13,188 Recognized on derivatives — (33,159) Recognized on hedged items — 32,074 Net income (expense) recognized on fair value hedges $ — $ 12,103 Gain (losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized gains (losses) reclassified from AOCI into net income (2) $ 44,774 $ (914) Net income (expense) recognized on cash flow hedges $ 44,774 $ (914) Three Months Ended March 31, 2020 Total amounts presented in the unaudited condensed consolidated statements of income $ 715,476 $ 21,176 Gains (losses) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements and amortization on derivatives $ — $ 3,365 Recognized on derivatives — 105,944 Recognized on hedged items — (99,171) Net income (expense) recognized on fair value hedges $ — $ 10,138 Gain (losses) on cash flow hedging relationships: (1) Interest rate contracts: Realized losses reclassified from AOCI into net income (2) $ 5,459 $ (419) Net income (expense) recognized on cash flow hedges $ 5,459 $ (419) (1) See Note 9, Comprehensive Income, for gain or loss recognized for cash flow hedges in accumulated other comprehensive income. (2) Pre-tax
Schedule of fair value hedging instruments	The following table presents the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities on the Company's Unaudited Condensed Consolidated Balance Sheets in fair value hedging relationships. Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Liabilities Carrying Amount of Hedged Liabilities Hedged Items Currently Designated Hedged Items No Longer Designated (In Thousands) March 31, 2021 FHLB and other borrowings $ 3,261,916 $ 74,942 $ 1,113 December 31, 2020 FHLB and other borrowings $ 3,260,644 $ 107,023 $ 1,168
Schedule of other derivatives not designated as hedging instruments	The net gains and losses recorded in the Company's Unaudited Condensed Consolidated Statements of Income from free-standing derivative instruments not designated as hedging instruments are summarized in the following table. Gain (Loss) for the Condensed Consolidated Three Months Ended March 31, Statements of Income Caption 2021 2020 (In Thousands) Futures contracts Mortgage banking income and corporate and correspondent investment sales $ 6 $ (793) Interest rate contracts: Interest rate lock commitments Mortgage banking income (9,957) 9,322 Option contracts related to mortgage servicing rights Mortgage banking income — 1,528 Forward contracts related to residential mortgage loans held for sale Mortgage banking income 11,162 (5,907) Interest rate contracts for customers Corporate and correspondent investment sales 7,395 4,137 Equity contracts: Purchased equity option related to equity-linked CDs Other expense (270) (1,888) Written equity option related to equity-linked CDs Other expense 224 1,624 Foreign currency contracts: Forward and swap contracts related to commercial loans Other income 7,095 25,981 Spot contracts related to commercial loans Other income (2,179) 771 Foreign currency exchange contracts for customers Corporate and correspondent investment sales 6,082 4,701
Schedule of assets subject to enforceable master netting arrangements	The following table represents the Company’s total gross derivative instrument assets and liabilities subject to an enforceable master netting arrangement. The derivative instruments the Company has with its customers are not subject to an enforceable master netting arrangement. Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) March 31, 2021 Derivative financial assets: Subject to a master netting arrangement $ 46,117 $ — $ 46,117 $ — $ 13,195 $ 32,922 Not subject to a master netting arrangement 445,213 — 445,213 — — 445,213 Total derivative financial assets $ 491,330 $ — $ 491,330 $ — $ 13,195 $ 478,135 Derivative financial liabilities: Subject to a master netting arrangement $ 112,079 $ — $ 112,079 $ — $ 112,079 $ — Not subject to a master netting arrangement 57,441 — 57,441 — — 57,441 Total derivative financial liabilities $ 169,520 $ — $ 169,520 $ — $ 112,079 $ 57,441 December 31, 2020 Derivative financial assets: Subject to a master netting arrangement $ 38,554 $ — $ 38,554 $ — $ 3,771 $ 34,783 Not subject to a master netting arrangement 647,802 — 647,802 — — 647,802 Total derivative financial assets $ 686,356 $ — $ 686,356 $ — $ 3,771 $ 682,585 Derivative financial liabilities: Subject to a master netting arrangement $ 153,524 $ — $ 153,524 $ — $ 153,524 $ — Not subject to a master netting arrangement 32,420 — 32,420 — — 32,420 Total derivative financial liabilities $ 185,944 $ — $ 185,944 $ — $ 153,524 $ 32,420
Schedule of liabilities subject to enforceable master netting arrangements	The following table represents the Company’s total gross derivative instrument assets and liabilities subject to an enforceable master netting arrangement. The derivative instruments the Company has with its customers are not subject to an enforceable master netting arrangement. Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) March 31, 2021 Derivative financial assets: Subject to a master netting arrangement $ 46,117 $ — $ 46,117 $ — $ 13,195 $ 32,922 Not subject to a master netting arrangement 445,213 — 445,213 — — 445,213 Total derivative financial assets $ 491,330 $ — $ 491,330 $ — $ 13,195 $ 478,135 Derivative financial liabilities: Subject to a master netting arrangement $ 112,079 $ — $ 112,079 $ — $ 112,079 $ — Not subject to a master netting arrangement 57,441 — 57,441 — — 57,441 Total derivative financial liabilities $ 169,520 $ — $ 169,520 $ — $ 112,079 $ 57,441 December 31, 2020 Derivative financial assets: Subject to a master netting arrangement $ 38,554 $ — $ 38,554 $ — $ 3,771 $ 34,783 Not subject to a master netting arrangement 647,802 — 647,802 — — 647,802 Total derivative financial assets $ 686,356 $ — $ 686,356 $ — $ 3,771 $ 682,585 Derivative financial liabilities: Subject to a master netting arrangement $ 153,524 $ — $ 153,524 $ — $ 153,524 $ — Not subject to a master netting arrangement 32,420 — 32,420 — — 32,420 Total derivative financial liabilities $ 185,944 $ — $ 185,944 $ — $ 153,524 $ 32,420

Securities Financing Activiti_2

Securities Financing Activities (Tables)	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Schedule of assets and liabilities subject to enforceable master netting arrangements	Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) March 31, 2021 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 3,367,186 $ 2,400,665 $ 966,521 $ 966,521 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 3,367,001 $ 2,400,665 $ 966,336 $ 966,336 $ — $ — December 31, 2020 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 986,290 $ 798,097 $ 188,193 $ 188,193 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 982,575 $ 798,097 $ 184,478 $ 184,478 $ — $ —
Schedule of securities sold under agreements to repurchase	The following table presents the Company's related activity, by collateral type and remaining contractual maturity. Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater Than 90 days Total (In Thousands) March 31, 2021 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 1,128,705 $ 872,063 $ 296,875 $ 960,795 $ 3,258,438 Mortgage-backed securities 108,563 — — — 108,563 Total $ 1,237,268 $ 872,063 $ 296,875 $ 960,795 $ 3,367,001 December 31, 2020 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 880,200 $ — $ 102,375 $ — $ 982,575 Mortgage-backed securities — — — — — Total $ 880,200 $ — $ 102,375 $ — $ 982,575

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of commitments to extend credit, standby letters of credit and commercial letters of credit	The following represents the Company’s commitments to extend credit, standby letters of credit and commercial letters of credit: March 31, 2021 December 31, 2020 (In Thousands) Commitments to extend credit $ 28,216,551 $ 28,251,150 Standby and commercial letters of credit 836,442 853,450

Fair Value of Measurements (Tab

Fair Value of Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Summary of asset and liabilities measure at fair value on a recurring basis	The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2021 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 101,539 $ 101,539 $ — $ — Interest rate contracts 422,427 — 422,427 — Foreign exchange contracts 37,221 — 37,221 — Total trading account assets 561,187 101,539 459,648 — Debt securities available for sale: U.S. Treasury and other U.S. government agencies 2,064,210 1,637,944 426,266 — Mortgage-backed securities 797,804 — 797,804 — Collateralized mortgage obligations 2,545,512 — 2,545,512 — States and political subdivisions 561 — 561 — Total debt securities available for sale 5,408,087 1,637,944 3,770,143 — Loans held for sale 295,570 — 295,570 — Derivative assets: Interest rate contracts 25,473 — 17,382 8,091 Equity contracts 304 — 304 — Foreign exchange contracts 5,905 — 5,905 — Total derivative assets 31,682 — 23,591 8,091 Other assets: Equity securities 16,473 16,473 — — MSR 41,432 — — 41,432 SBIC 198,200 — — 198,200 Liabilities: Trading account liabilities: Interest rate contracts $ 123,551 $ — $ 123,551 $ — Foreign exchange contracts 35,193 — 35,193 — Total trading account liabilities 158,744 — 158,744 — Derivative liabilities: Interest rate contracts 2,280 — 2,129 151 Equity contracts 244 — 244 — Foreign exchange contracts 1,844 — 1,844 — Total derivative liabilities 4,368 — 4,217 151 Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2020 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 109,142 $ 109,142 $ — $ — Interest rate contracts 616,566 — 616,566 — Foreign exchange contracts 36,741 — 36,741 — Total trading account assets 762,449 109,142 653,307 — Debt securities available for sale: U.S. Treasury and other U.S. government agencies 2,146,904 1,694,160 452,744 — Mortgage-backed securities 865,648 — 865,648 — Collateralized mortgage obligations 2,731,731 — 2,731,731 — States and political subdivisions 636 — 636 — Total debt securities available for sale 5,744,919 1,694,160 4,050,759 — Loans held for sale 236,586 — 236,586 — Derivative assets: Interest rate contracts 30,716 — 12,819 17,897 Equity contracts 574 — 574 — Foreign exchange contracts 1,759 — 1,759 — Total derivative assets 33,049 — 15,152 17,897 Other assets: Equity securities 14,032 14,032 — — MSR 30,665 — — 30,665 SBIC 162,578 — — 162,578 Liabilities: Trading account liabilities: Interest rate contracts $ 128,831 $ — $ 128,831 $ — Foreign exchange contracts 34,598 — 34,598 — Total trading account liabilities 163,429 — 163,429 — Derivative liabilities: Interest rate contracts 8,049 — 8,049 — Equity contracts 468 — 468 — Foreign exchange contracts 7,481 — 7,481 — Total derivative liabilities 15,998 — 15,998 —
Reconciliation of assets measured on a recurring basis using significant unobservable inputs	The following tables reconcile the assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3). Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Three Months Ended March 31, Interest Rate Contracts, net Other Assets - MSR Other Assets - SBIC (In Thousands) Balance, December 31, 2019 $ 3,088 $ 42,022 $ 119,475 Transfers into Level 3 — — — Transfers out of Level 3 — — — Total gains or losses (realized/unrealized): Included in earnings (1) 9,322 (12,461) 27,658 Included in other comprehensive income — — — Purchases, issuances, sales and settlements: Purchases — — 9,267 Issuances — 1,671 — Sales — — — Settlements — — — Balance, March 31, 2020 $ 12,410 $ 31,232 $ 156,400 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at March 31, 2020 $ 9,322 $ (12,461) $ 27,658 Balance, December 31, 2020 $ 17,897 $ 30,665 $ 162,578 Transfers into Level 3 — — — Transfers out of Level 3 — — — Total gains or losses (realized/unrealized): Included in earnings (1) (9,957) 6,782 21,376 Included in other comprehensive income — — — Purchases, issuances, sales and settlements: Purchases — — 14,246 Issuances — 3,985 — Sales — — — Settlements — — — Balance, March 31, 2021 $ 7,940 $ 41,432 $ 198,200 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at March 31, 2021 $ (9,957) $ 6,782 $ 21,376 (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income.
Schedule of carrying amounts and estimated fair values within the fair value hierarchy	The following tables represent those assets that were subject to fair value adjustments during the three months ended March 31, 2021 and 2020, and still held as of the end of the period, and the related gains and losses from fair value adjustments on assets sold during the period as well as assets still held as of the end of the period. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) March 31, 2021 (Level 1) (Level 2) (Level 3) Three Months Ended March 31, 2021 (In Thousands) Nonrecurring fair value measurements Assets: OREO $ 10,965 $ — $ — $ 10,965 $ (450) Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) March 31, 2020 (Level 1) (Level 2) (Level 3) Three Months Ended March 31, 2020 (In Thousands) Nonrecurring fair value measurements Assets: OREO $ 21,392 $ — $ — $ 21,392 $ (707)
Schedule of fair value measurement inputs	The tables below present information about the significant unobservable inputs for material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring and nonrecurring basis. Quantitative Information about Level 3 Fair Value Measurements Fair Value at Range of Unobservable Inputs March 31, 2021 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Interest rate contracts, net $ 7,940 Discounted cash flow Closing ratios (pull-through) 4.8% - 99.8% (64.4%) Cap grids 0.5% - 2.5% (1.2%) Other assets - MSRs 41,432 Discounted cash flow Option adjusted spread 6.0% - 8.3% (6.2%) Constant prepayment rate or life speed 0.1% - 97.1% (13.6%) Cost to service $65 - $4,000 ($100) Other assets - SBIC investments 198,200 Transaction price Transaction price N/A Nonrecurring fair value measurements: OREO 10,965 Appraised value Appraised value 8.0% (1) (1) Represents discount to appraised value for estimated costs to sell. Quantitative Information about Level 3 Fair Value Measurements Fair Value at Range of Unobservable Inputs December 31, 2020 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Interest rate contracts, net $ 17,897 Discounted cash flow Closing ratios (pull-through) 18.2% - 100.0% (62.5%) Cap grids 0.3% - 2.6% (1.0%) Other assets - MSRs 30,665 Discounted cash flow Option adjusted spread 6.0% - 8.3% (6.2%) Constant prepayment rate or life speed 3.5% - 90.3% (19.9%) Cost to service $65 - $4,000 ($100) Other assets - SBIC investments 162,578 Transaction price Transaction price N/A Nonrecurring fair value measurements: OREO 11,448 Appraised value Appraised value 8.0% (1) (1) Represents discount to appraised value for estimated costs to sell.
Schedule of fair value by balance sheet location	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments, excluding financial instruments measured at fair value on a recurring basis, are as follows: March 31, 2021 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 15,142,724 $ 15,142,724 $ 15,142,724 $ — $ — Debt securities held to maturity 12,341,963 12,497,012 2,619,569 9,337,935 539,508 Loans 63,960,242 62,435,802 — — 62,435,802 Liabilities: Deposits $ 85,970,954 $ 85,979,097 $ — $ 85,979,097 $ — FHLB and other borrowings 3,517,567 3,512,568 — 3,512,568 — Federal funds purchased and securities sold under agreements to repurchase 966,336 966,336 — 966,336 — December 31, 2020 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 14,607,908 $ 14,607,908 $ 14,607,908 $ — $ — Debt securities held to maturity 10,552,123 10,809,461 1,404,868 8,837,070 567,523 Loans 65,559,767 64,459,914 — — 64,459,914 Liabilities: Deposits $ 85,858,381 $ 85,872,252 $ — $ 85,872,252 $ — FHLB and other borrowings 3,548,492 3,489,951 — 3,489,951 — Federal funds purchased and securities sold under agreements to repurchase 184,478 184,478 — 184,478 —
Schedule of differences between aggregate fair value and aggregate unpaid principle balance	The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential mortgage loans measured at fair value. Aggregate Fair Value Aggregate Unpaid Principal Balance Difference (In Thousands) March 31, 2021 Residential mortgage loans held for sale $ 295,570 $ 289,222 $ 6,348 December 31, 2020 Residential mortgage loans held for sale $ 236,586 $ 223,929 $ 12,657

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Change in components of other comprehensive income (loss)	The following summarizes the change in the components of other comprehensive income. Three Months Ended March 31, 2021 2020 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income: Unrealized holding (losses) gains arising during period from debt securities available for sale $ (23,783) $ (5,644) $ (18,139) $ 130,943 $ 31,244 $ 99,699 Less: reclassification adjustment for net gains on sale of debt securities in net income — — — 19,139 4,567 14,572 Net change in unrealized (losses) gains on debt securities available for sale (23,783) (5,644) (18,139) 111,804 26,677 85,127 Change in unamortized net holding gains on debt securities held to maturity 2,492 592 1,900 2,069 494 1,575 Change in unamortized non-credit related impairment on debt securities held to maturity 183 43 140 155 37 118 Net change in unamortized holding gains on debt securities held to maturity 2,675 635 2,040 2,224 531 1,693 Unrealized holding (losses) gains arising during period from cash flow hedge instruments (60,428) (14,339) (46,089) 360,963 86,126 274,837 Change in defined benefit plans (3,553) (842) (2,711) 2,301 547 1,754 Other comprehensive (loss) income $ (85,089) $ (20,190) $ (64,899) $ 477,292 $ 113,881 $ 363,411
Schedule of accumulated other comprehensive income (loss)	Activity in accumulated other comprehensive income (loss), net of tax was as follows: Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity Accumulated Gains (Losses) on Cash Flow Hedging Instruments Defined Benefit Plan Adjustment Unamortized Impairment Losses on Debt Securities Held to Maturity Total (In Thousands) Balance, December 31, 2019 $ (40,080) $ 91,445 $ (46,666) $ (5,771) $ (1,072) Other comprehensive income before reclassifications 99,699 278,675 — — 378,374 Amounts reclassified from accumulated other comprehensive (loss) income (12,997) (3,838) 1,754 118 (14,963) Net current period other comprehensive income 86,702 274,837 1,754 118 363,411 Balance, March 31, 2020 $ 46,622 $ 366,282 $ (44,912) $ (5,653) $ 362,339 Balance, December 31, 2020 $ 64,542 $ 306,310 $ (36,450) $ (5,297) $ 329,105 Other comprehensive loss before reclassifications (18,139) (12,637) — — (30,776) Amounts reclassified from accumulated other comprehensive (loss) income 1,900 (33,452) (2,711) 140 (34,123) Net current period other comprehensive income (loss) (16,239) (46,089) (2,711) 140 (64,899) Balance, March 31, 2021 $ 48,303 $ 260,221 $ (39,161) $ (5,157) $ 264,206
Schedule of reclassifications out of accumulated other comprehensive income	The following table presents information on reclassifications out of accumulated other comprehensive income (loss). Details About Accumulated Other Comprehensive Income (Loss) Components Amounts Reclassified From Accumulated Other Comprehensive Income (Loss) (1) Condensed Consolidated Statements of Income Caption Three Months Ended March 31, 2021 2020 (In Thousands) Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity $ — $ 19,139 Investment securities gains, net (2,492) (2,069) Interest on debt securities held to maturity (2,492) 17,070 592 (4,073) Income tax (expense) benefit $ (1,900) $ 12,997 Net of tax Accumulated Gains (Losses) on Cash Flow Hedging Instruments $ 44,774 $ 5,459 Interest and fees on loans (914) (419) Interest on FHLB and other borrowings 43,860 5,040 (10,408) (1,202) Income tax expense $ 33,452 $ 3,838 Net of tax Defined Benefit Plan Adjustment $ 3,553 $ (2,301) (2) (842) 547 Income tax (expense) benefit $ 2,711 $ (1,754) Net of tax Unamortized Impairment Losses on Debt Securities Held to Maturity $ (183) $ (155) Interest on debt securities held to maturity 43 37 Income tax benefit $ (140) $ (118) Net of tax (1) Amounts in parentheses indicate debits to the Unaudited Condensed Consolidated Statements of Income. (2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 17, Benefit Plans, in the Notes to the December 31, 2020, Consolidated Financial Statements for additional details).

Supplemental Disclosure for S_2

Supplemental Disclosure for Statement of Cash Flows (Tables)	3 Months Ended
	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental cash flow disclosures	The following table presents the Company’s supplemental disclosures for statement of cash flows. Three Months Ended March 31, 2021 2020 (In Thousands) Supplemental disclosures of cash flow information: Interest paid $ 9,992 $ 207,334 Net income taxes (refunded) paid (1,955) 7,208 Operating cash flows from operating leases 12,923 12,499 Operating cash flows from finance leases 119 140 Financing cash flows from finance leases 444 414 Supplemental schedule of noncash activities: Transfer of loans and loans held for sale to OREO $ 1,789 $ 5,735 Right-of-use assets obtained in exchange for lease obligations- operating leases 5,145 17,568
Schedule of cash and cash equivalents	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Company’s Unaudited Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Company's Unaudited Condensed Consolidated Statements of Cash Flows. Three Months Ended March 31, 2021 2020 (In Thousands) Cash and cash equivalents $ 15,142,724 $ 5,513,268 Restricted cash in other assets 385,013 306,798 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 15,527,737 $ 5,820,066
Schedule of restricted cash equivalents	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Company’s Unaudited Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Company's Unaudited Condensed Consolidated Statements of Cash Flows. Three Months Ended March 31, 2021 2020 (In Thousands) Cash and cash equivalents $ 15,142,724 $ 5,513,268 Restricted cash in other assets 385,013 306,798 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 15,527,737 $ 5,820,066

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule of segment reporting information	The following tables present the segment information for the Company’s existing segments. Three Months Ended March 31, 2021 Commercial Banking and Wealth Retail Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 312,218 $ 256,937 $ 39,204 $ 113,769 $ (57,860) $ 664,268 Allocated (credit) provision for credit losses (62,903) (3,980) (40,987) 39 (12,311) (120,142) Noninterest income 65,563 115,713 43,081 8,212 71,132 303,701 Noninterest expense 149,943 307,550 49,465 4,558 107,474 618,990 Net income (loss) before income tax expense (benefit) 290,741 69,080 73,807 117,384 (81,891) 469,121 Income tax expense (benefit) 61,056 14,507 15,499 24,651 (32,053) 83,660 Net income (loss) 229,685 54,573 58,308 92,733 (49,838) 385,461 Less: net income attributable to noncontrolling interests 179 — — 387 15 581 Net income (loss) attributable to BBVA USA Bancshares, Inc. $ 229,506 $ 54,573 $ 58,308 $ 92,346 $ (49,853) $ 384,880 Average assets $ 42,593,214 $ 17,472,177 $ 7,636,021 $ 31,172,166 $ 6,266,623 $ 105,140,201 Three Months Ended March 31, 2020 Commercial Banking and Wealth Retail Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 291,282 $ 265,462 $ 33,828 $ (17,691) $ 16,574 $ 589,455 Allocated provision (credit) for credit losses 130,982 129,140 83,132 (195) 13,932 356,991 Noninterest income 68,535 130,702 40,135 26,202 68,668 334,242 Noninterest expense 174,101 305,257 61,395 4,046 2,264,261 2,809,060 Net income (loss) before income tax expense (benefit) 54,734 (38,233) (70,564) 4,660 (2,192,951) (2,242,354) Income tax expense (benefit) 11,494 (8,029) (14,819) 979 5,306 (5,069) Net income (loss) 43,240 (30,204) (55,745) 3,681 (2,198,257) (2,237,285) Less: net income (loss) attributable to noncontrolling interests 116 — — 396 (11) 501 Net income (loss) attributable to BBVA USA Bancshares, Inc. $ 43,124 $ (30,204) $ (55,745) $ 3,285 $ (2,198,246) $ (2,237,786) Average assets $ 41,090,411 $ 18,632,122 $ 8,272,714 $ 20,254,258 $ 8,106,608 $ 96,356,113

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2021
Related Party Transactions [Abstract]
Schedule of derivative contracts between the Company and BBVA	The net fair value of outstanding derivative contracts between the Company and BBVA are detailed below. March 31, 2021 December 31, 2020 (In Thousands) Derivative contracts: Fair value hedges $ (375) $ (748) Cash flow hedges (64) (19) Free-standing derivatives not designated as hedging instruments (29,565) (44,958) March 31, 2021 December 31, 2020 (In Thousands) Securities purchased under agreements to resell $ 928,235 $ 186,568 Securities sold under agreements to repurchase 3,291 6,426

Basis of Presentation (Details)

Basis of Presentation (Details) - BBVA USA Bancshares, Inc. - PNC $ in Billions	Nov. 15, 2020USD ($)
Business Acquisition [Line Items]
Voting interests percentage acquired, proposed	100.00%
Payments to acquire business, proposed	$ 11.6

Debt Securities Available for_3

Debt Securities Available for Sale and Debt Securities Held to Maturity - Adjusted cost and fair value of securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021		Dec. 31, 2020		Mar. 31, 2020	Dec. 31, 2019
Debt securities available for sale:
Available-for-sale securities, amortized cost	$ 5,319,333		$ 5,632,382
Available-for-sale securities, gross unrealized gains	105,762		128,101
Available-for-sale securities, gross unrealized losses	17,008		15,564
Available-for-sale securities, fair value	5,408,087		5,744,919
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	12,341,963		10,552,123
Held-to-maturity securities, gross unrealized gains	242,333		290,871
Held-to-maturity securities, gross unrealized losses	87,284		33,533
Held-to-maturity securities, fair value	12,497,012		10,809,461
Allowance for debt securities held to maturity losses	1,969		2,178		$ 1,892	$ 0
U.S. Treasury and other U.S. government agencies
Debt securities available for sale:
Available-for-sale securities, amortized cost	2,041,182		2,115,915
Available-for-sale securities, gross unrealized gains	37,301		45,168
Available-for-sale securities, gross unrealized losses	14,273		14,179
Available-for-sale securities, fair value	2,064,210		2,146,904
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	2,550,157		1,291,900
Held-to-maturity securities, gross unrealized gains	93,298		112,968
Held-to-maturity securities, gross unrealized losses	23,886		0
Held-to-maturity securities, fair value	2,619,569		1,404,868
Agency mortgage-backed securities
Debt securities available for sale:
Available-for-sale securities, amortized cost	774,456		834,640
Available-for-sale securities, gross unrealized gains	25,452		32,103
Available-for-sale securities, gross unrealized losses	2,104		1,095
Available-for-sale securities, fair value	797,804		865,648
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	921,354		570,115
Held-to-maturity securities, gross unrealized gains	0		2,491
Held-to-maturity securities, gross unrealized losses	17,323		0
Held-to-maturity securities, fair value	904,031		572,606
Agency collateralized mortgage obligations
Debt securities available for sale:
Available-for-sale securities, amortized cost	2,503,150		2,681,210
Available-for-sale securities, gross unrealized gains	42,993		50,811
Available-for-sale securities, gross unrealized losses	631		290
Available-for-sale securities, fair value	2,545,512		2,731,731
State and political subdivisions
Debt securities available for sale:
Available-for-sale securities, amortized cost	545		617
Available-for-sale securities, gross unrealized gains	16		19
Available-for-sale securities, gross unrealized losses	0		0
Available-for-sale securities, fair value	561		636
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	444,236	[1]	467,610	[2]
Held-to-maturity securities, gross unrealized gains	16,387	[1]	21,047	[2]
Held-to-maturity securities, gross unrealized losses	918	[1]	3,409	[2]
Held-to-maturity securities, fair value	459,705	[1]	485,248	[2]
Allowance for debt securities held to maturity losses	2,000		2,000
Agency
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	8,353,460		8,144,522
Held-to-maturity securities, gross unrealized gains	125,129		147,176
Held-to-maturity securities, gross unrealized losses	44,685		27,234
Held-to-maturity securities, fair value	8,433,904		8,264,464
Non-agency
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	27,319		29,186
Held-to-maturity securities, gross unrealized gains	6,047		5,972
Held-to-maturity securities, gross unrealized losses	53		209
Held-to-maturity securities, fair value	33,313		34,949
Asset-backed securities and other
Debt securities held to maturity:
Held-to-maturity securities, amortized cost	45,437		48,790
Held-to-maturity securities, gross unrealized gains	1,472		1,217
Held-to-maturity securities, gross unrealized losses	419		2,681
Held-to-maturity securities, fair value	$ 46,490		$ 47,326
[1]	The Company recorded an allowance of $2 million at March 31, 2021, related to state and political subdivisions, which is not included in the table above.
[2]	The Company recorded an allowance of $2 million at December 31, 2020, related to state and political subdivisions, which is not included in the table above.

Debt Securities Available for_4

Debt Securities Available for Sale and Debt Securities Held to Maturity - Fair value and gross unrealized losses of available for sale debt securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	$ 477,633	$ 128,249
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	2,577	473
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	457,093	532,650
Available-for-sale securities, securities in a loss position for 12 months or longer, unrealized losses	14,431	15,091
Available-for-sale securities, fair value	934,726	660,899
Available-for-sale securities, unrealized losses	17,008	15,564
U.S. Treasury and other U.S. government agencies
Debt securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	28,410	6,041
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	790	60
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	319,805	335,296
Available-for-sale securities, securities in a loss position for 12 months or longer, unrealized losses	13,483	14,119
Available-for-sale securities, fair value	348,215	341,337
Available-for-sale securities, unrealized losses	14,273	14,179
Agency mortgage-backed securities
Debt securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	32,699	25,710
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	1,286	299
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	34,710	35,326
Available-for-sale securities, securities in a loss position for 12 months or longer, unrealized losses	818	796
Available-for-sale securities, fair value	67,409	61,036
Available-for-sale securities, unrealized losses	2,104	1,095
Agency collateralized mortgage obligations
Debt securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	416,524	96,498
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	501	114
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	102,578	162,028
Available-for-sale securities, securities in a loss position for 12 months or longer, unrealized losses	130	176
Available-for-sale securities, fair value	519,102	258,526
Available-for-sale securities, unrealized losses	$ 631	$ 290

Debt Securities Available for_5

Debt Securities Available for Sale and Debt Securities Held to Maturity - Allowance for credit losses for debt securities held to maturity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 2,178	$ 0
(Credit) provision for credit losses	(209)	45
Securities charged off	0	0
Recoveries	0	0
Balance at end of period	1,969	1,892
Impact of adopting ASC 326
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		1,847
Cumulative Effect, Period of Adoption, Adjusted Balance
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 2,178	$ 1,847

Debt Securities Available for_6

Debt Securities Available for Sale and Debt Securities Held to Maturity - Debt securities held to maturity through credit ratings (Details) - USD ($) $ in Thousands	Mar. 31, 2021		Dec. 31, 2020		Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	$ 12,341,963		$ 10,552,123
Allowance for debt securities held to maturity losses	1,969		2,178		$ 1,892	$ 0
AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	11,825,195		10,006,815
AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	287,378		301,177
BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	218,038		232,117
CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	3,528		5,925
D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	771		2,533
NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	7,053		3,556
U.S. Treasury and other U.S. government agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	2,550,157		1,291,900
U.S. Treasury and other U.S. government agencies | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	2,550,157		1,291,900
U.S. Treasury and other U.S. government agencies | AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
U.S. Treasury and other U.S. government agencies | BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
U.S. Treasury and other U.S. government agencies | CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
U.S. Treasury and other U.S. government agencies | D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
U.S. Treasury and other U.S. government agencies | NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	921,354		570,115
Agency mortgage-backed securities | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	921,354		570,115
Agency mortgage-backed securities | AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency mortgage-backed securities | BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency mortgage-backed securities | CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency mortgage-backed securities | D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency mortgage-backed securities | NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	8,353,460		8,144,522
Agency | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	8,353,460		8,144,522
Agency | AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency | BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency | CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency | D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Agency | NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Non-agency
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	27,319		29,186
Non-agency | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	224		278
Non-agency | AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	6,357		6,840
Non-agency | BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	9,770		10,517
Non-agency | CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	3,144		5,462
Non-agency | D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	771		2,533
Non-agency | NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	7,053		3,556
Asset-backed securities and other
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	45,437		48,790
Asset-backed securities and other | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Asset-backed securities and other | AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	44,870		48,127
Asset-backed securities and other | BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	183		200
Asset-backed securities and other | CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	384		463
Asset-backed securities and other | D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
Asset-backed securities and other | NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
State and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	444,236	[1]	467,610	[2]
Allowance for debt securities held to maturity losses	2,000		2,000
State and political subdivisions | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
State and political subdivisions | AA+ / A -
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	236,151		246,210
State and political subdivisions | BBB+ / B-
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	208,085		221,400
State and political subdivisions | CCC+ / C
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
State and political subdivisions | D
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	0		0
State and political subdivisions | NR
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities, amortized cost	$ 0		$ 0
[1]	The Company recorded an allowance of $2 million at March 31, 2021, related to state and political subdivisions, which is not included in the table above.
[2]	The Company recorded an allowance of $2 million at December 31, 2020, related to state and political subdivisions, which is not included in the table above.

Debt Securities Available for_7

Debt Securities Available for Sale and Debt Securities Held to Maturity - Maturities of securities portfolios (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investment securities available for sale, amortized cost [Abstract]
Maturing within one year	$ 250,000
Maturing after one but within five years	1,394,623
Maturing after five but within ten years	4,755
Maturing after ten years	392,349
Total single date maturities	2,041,727
Agency mortgage-backed securities and agency collateralized mortgage obligations	3,277,606
Available-for-sale securities, amortized cost	5,319,333	$ 5,632,382
Investment securities available for sale, fair value [Abstract]
Maturing within one year	250,000
Maturing after one but within five years	1,430,793
Maturing after five but within ten years	4,828
Maturing after ten years	379,150
Total single date maturities	2,064,771
Agency mortgage-backed securities and agency collateralized mortgage obligations	3,343,316
Total	5,408,087	5,744,919
Held-to-maturity securities, amortized cost [Abstract]
Maturing within one year	11,240
Maturing after one but within five years	1,392,538
Maturing after five but within ten years	1,546,716
Maturing after ten years	89,336
Total single date maturities	3,039,830
Agency mortgage-backed securities and agency and non-agency collateralized mortgage obligations	9,302,133
Held-to-maturity securities, amortized cost	12,341,963	10,552,123
Held-to-maturity securities, fair value [Abstract]
Maturing within one year	11,265
Maturing after one but within five years	1,486,375
Maturing after five but within ten years	1,537,655
Maturing after ten years	90,469
Total single date maturities	3,125,764
Agency mortgage-backed securities and agency and non-agency collateralized mortgage obligations	9,371,248
Total	$ 12,497,012	$ 10,809,461

Debt Securities Available for_8

Debt Securities Available for Sale and Debt Securities Held to Maturity - Gross realized gains and losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Gross gains	$ 0	$ 19,139
Gross losses	0	0
Net realized gains	$ 0	$ 19,139

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Narrative (Details) loan in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Number of loan deferrals | loan	3
Loan deferrals, amortized cost	$ 279
Impact to the allowance for loan losses related to modifications classified as TDRs	(3.3)	$ 5.3
Commitments to lend additional funds to borrowers whose terms have been modified in a TDR	175.6		$ 132.5
Other real estate owned	11		11
Loans secured by residential real estate properties for which formal foreclosure proceedings were in process	26		29
Other assets
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Accrued interest receivable	213		224
Interest Rate Concession
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
TDRs	7.8	5.2
Modification of Loan Structure
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
TDRs	325.1	$ 43.6
Residential real estate – mortgage
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Other real estate owned	$ 6		$ 6

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Composition of loan portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 63,960,242	$ 65,559,767
Commercial, Financial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	25,969,245	26,605,142
Commercial Real Estate | Real estate – construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,396,004	2,498,331
Commercial Real Estate | Commercial real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	13,412,272	13,565,314
Residential Real Estate | Residential real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,823,641	13,327,774
Residential Real Estate | Equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,318,208	2,394,894
Residential Real Estate | Equity loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	165,209	179,762
Consumer | Credit card
Loans and Leases Receivable Disclosure [Line Items]
Loans	812,242	881,702
Consumer | Consumer direct
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,797,085	1,929,723
Consumer | Consumer indirect
Loans and Leases Receivable Disclosure [Line Items]
Loans	4,266,336	4,177,125
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	41,777,521	42,668,787
Commercial | Commercial, Financial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	25,969,245	26,605,142
Commercial | Commercial Real Estate | Real estate – construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,396,004	2,498,331
Commercial | Commercial Real Estate | Commercial real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	13,412,272	13,565,314
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	22,182,721	22,890,980
Consumer | Residential Real Estate | Residential real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,823,641	13,327,774
Consumer | Residential Real Estate | Equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,318,208	2,394,894
Consumer | Residential Real Estate | Equity loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	165,209	179,762
Consumer | Consumer | Credit card
Loans and Leases Receivable Disclosure [Line Items]
Loans	812,242	881,702
Consumer | Consumer | Consumer direct
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,797,085	1,929,723
Consumer | Consumer | Consumer indirect
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 4,266,336	$ 4,177,125

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Allowance for loan losses by portfolio (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		$ 1,679,474	$ 920,993
Provision (credit) for loan losses		(119,933)	356,946
Loans charged-off		(91,361)	(142,159)
Loan recoveries		30,729	30,361
Net (charge-offs) recoveries		(60,632)	(111,798)
Balance at end of period		1,498,909	1,351,072
Commercial, Financial and Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		658,228	408,197
Provision (credit) for loan losses		(84,950)	140,413
Loans charged-off		(12,942)	(24,207)
Loan recoveries		11,735	5,193
Net (charge-offs) recoveries		(1,207)	(19,014)
Balance at end of period		572,071	547,985
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[1]	311,092	118,633
Provision (credit) for loan losses	[1]	(30,150)	24,548
Loans charged-off	[1]	(44)	(87)
Loan recoveries	[1]	177	173
Net (charge-offs) recoveries	[1]	133	86
Balance at end of period	[1]	281,075	108,233
Residential Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[2]	214,469	99,089
Provision (credit) for loan losses	[2]	(15,382)	7,032
Loans charged-off	[2]	(1,747)	(1,999)
Loan recoveries	[2]	1,093	1,423
Net (charge-offs) recoveries	[2]	(654)	(576)
Balance at end of period	[2]	198,433	152,935
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[3]	495,685	295,074
Provision (credit) for loan losses	[3]	10,549	184,953
Loans charged-off	[3]	(76,628)	(115,866)
Loan recoveries	[3]	17,724	23,572
Net (charge-offs) recoveries	[3]	(58,904)	(92,294)
Balance at end of period	[3]	$ 447,330	541,919
Impact of adopting ASC 326
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			184,931
Impact of adopting ASC 326 | Commercial, Financial and Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			18,389
Impact of adopting ASC 326 | Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[1]		(35,034)
Impact of adopting ASC 326 | Residential Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[2]		47,390
Impact of adopting ASC 326 | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[3]		154,186
Beginning balance, after adoption of ASC 326
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			1,105,924
Beginning balance, after adoption of ASC 326 | Commercial, Financial and Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			426,586
Beginning balance, after adoption of ASC 326 | Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[1]		83,599
Beginning balance, after adoption of ASC 326 | Residential Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[2]		146,479
Beginning balance, after adoption of ASC 326 | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	[3]		$ 449,260
[1]	Includes commercial real estate – mortgage and real estate – construction loans.
[2]	Includes residential real estate – mortgage, equity lines of credit and equity loans.
[3]	Includes credit card, consumer direct and consumer indirect loans.

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Nonaccrual loans by loan class (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 1,300,882	$ 1,331,230
Nonaccrual With No Recorded Allowance	261,742	171,243
Commercial, Financial and Agricultural
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	529,703	540,741
Nonaccrual With No Recorded Allowance	172,832	93,614
Real estate – construction | Commercial Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	25,265	25,316
Nonaccrual With No Recorded Allowance	0	0
Commercial real estate – mortgage | Commercial Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	418,935	442,137
Nonaccrual With No Recorded Allowance	88,910	77,629
Residential real estate – mortgage | Residential Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	235,441	235,463
Nonaccrual With No Recorded Allowance	0	0
Equity lines of credit | Residential Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	45,744	42,606
Nonaccrual With No Recorded Allowance	0	0
Equity loans | Residential Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	8,844	10,167
Nonaccrual With No Recorded Allowance	0	0
Credit card | Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0	0
Nonaccrual With No Recorded Allowance	0	0
Consumer direct | Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	13,098	10,087
Nonaccrual With No Recorded Allowance	0	0
Consumer indirect | Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	23,852	24,713
Nonaccrual With No Recorded Allowance	$ 0	$ 0

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Credit quality indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 63,960,242	$ 65,559,767
Commercial, Financial and Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total	25,969,245	26,605,142
Commercial Real Estate | Real estate – construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,396,004	2,498,331
Commercial Real Estate | Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total	13,412,272	13,565,314
Residential Real Estate | Residential real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total	12,823,641	13,327,774
Residential Real Estate | Equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,318,208	2,394,894
Residential Real Estate | Equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	165,209	179,762
Consumer | Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
Total	812,242	881,702
Consumer | Consumer direct
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,797,085	1,929,723
Consumer | Consumer indirect
Financing Receivable, Credit Quality Indicator [Line Items]
Total	4,266,336	4,177,125
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	41,777,521	42,668,787
Commercial | Commercial, Financial and Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,119,258	5,917,957
2020	5,458,412	2,937,401
2019	2,866,574	2,255,517
2018	2,131,937	3,207,615
2017	2,997,807	871,215
Prior	3,973,576	3,317,378
Recorded Investment of Revolving Loans	7,421,681	8,098,059
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	25,969,245	26,605,142
Commercial | Commercial, Financial and Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,050,720	5,784,167
2020	5,353,169	2,691,532
2019	2,656,762	1,986,737
2018	1,832,641	3,003,653
2017	2,817,125	754,848
Prior	3,598,179	3,030,800
Recorded Investment of Revolving Loans	6,359,264	6,861,548
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	23,667,860	24,113,285
Commercial | Commercial, Financial and Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	63,645	78,988
2020	15,593	166,896
2019	98,900	193,552
2018	216,057	107,194
2017	86,212	26,025
Prior	125,224	102,208
Recorded Investment of Revolving Loans	471,135	685,822
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	1,076,766	1,360,685
Commercial | Commercial, Financial and Agricultural | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,893	38,516
2020	68,342	66,725
2019	99,186	69,752
2018	81,450	96,059
2017	71,320	82,947
Prior	215,564	179,285
Recorded Investment of Revolving Loans	548,331	499,317
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	1,089,086	1,032,601
Commercial | Commercial, Financial and Agricultural | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	16,286
2020	21,308	12,248
2019	11,726	5,476
2018	1,789	709
2017	23,150	7,395
Prior	34,609	5,085
Recorded Investment of Revolving Loans	42,951	51,372
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	135,533	98,571
Commercial | Commercial Real Estate | Real estate – construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021	56,927	433,456
2020	560,285	801,060
2019	766,882	719,368
2018	593,713	289,381
2017	189,222	68,624
Prior	79,725	43,035
Recorded Investment of Revolving Loans	149,250	143,407
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	2,396,004	2,498,331
Commercial | Commercial Real Estate | Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	237,099	1,655,919
2020	1,622,718	2,962,558
2019	2,926,801	3,726,471
2018	3,655,252	1,522,177
2017	1,564,451	1,040,677
Prior	3,183,651	2,424,022
Recorded Investment of Revolving Loans	222,300	233,490
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	13,412,272	13,565,314
Commercial | Commercial Real Estate | Pass | Real estate – construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021	56,927	429,483
2020	554,067	785,835
2019	755,562	710,403
2018	584,592	271,229
2017	151,696	44,565
Prior	75,301	38,470
Recorded Investment of Revolving Loans	149,250	125,184
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	2,327,395	2,405,169
Commercial | Commercial Real Estate | Pass | Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	237,099	1,571,217
2020	1,535,357	2,796,409
2019	2,708,280	3,430,264
2018	3,347,413	1,371,053
2017	1,423,688	777,906
Prior	2,606,898	2,113,980
Recorded Investment of Revolving Loans	178,890	222,864
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	12,037,625	12,283,693
Commercial | Commercial Real Estate | Special Mention | Real estate – construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	9,015
2019	5,199	8,414
2018	8,395	0
2017	19,506	24,059
Prior	297	301
Recorded Investment of Revolving Loans	0	18,223
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	33,397	60,012
Commercial | Commercial Real Estate | Special Mention | Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	40,501
2020	28,911	131,400
2019	113,096	190,140
2018	192,868	36,834
2017	35,808	147,037
Prior	260,781	110,279
Recorded Investment of Revolving Loans	30,461	3,996
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	661,925	660,187
Commercial | Commercial Real Estate | Substandard | Real estate – construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	3,973
2020	6,218	6,210
2019	6,121	551
2018	726	18,152
2017	18,020	0
Prior	4,127	4,264
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	35,212	33,150
Commercial | Commercial Real Estate | Substandard | Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	44,201
2020	58,450	34,749
2019	105,425	106,067
2018	114,971	114,290
2017	103,119	112,976
Prior	312,068	195,821
Recorded Investment of Revolving Loans	12,949	6,630
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	706,982	614,734
Commercial | Commercial Real Estate | Doubtful | Real estate – construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	0	0
Commercial | Commercial Real Estate | Doubtful | Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	1,836	2,758
Prior	3,904	3,942
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	5,740	6,700
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total	22,182,721	22,890,980
Consumer | Residential Real Estate | Residential real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	802,011	3,885,742
2020	3,781,836	2,035,058
2019	1,741,728	905,343
2018	762,524	977,477
2017	828,997	1,134,524
Prior	4,906,545	4,389,630
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	12,823,641	13,327,774
Consumer | Residential Real Estate | Equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	2,308,568	2,383,986
Recorded Investment of Revolving Loans Converted to Term Loans	9,640	10,908
Total	2,318,208	2,394,894
Consumer | Residential Real Estate | Equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,681	12,683
2020	10,643	11,059
2019	9,237	9,108
2018	8,462	4,094
2017	3,678	3,242
Prior	127,508	139,576
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	165,209	179,762
Consumer | Residential Real Estate | Performing | Residential real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	802,011	3,881,274
2020	3,776,523	2,013,356
2019	1,717,121	883,919
2018	740,423	956,310
2017	805,765	1,109,560
Prior	4,704,304	4,201,849
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	12,546,147	13,046,268
Consumer | Residential Real Estate | Performing | Equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	2,260,999	2,338,907
Recorded Investment of Revolving Loans Converted to Term Loans	9,493	10,757
Total	2,270,492	2,349,664
Consumer | Residential Real Estate | Performing | Equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,681	11,894
2020	10,588	10,684
2019	9,130	8,624
2018	7,946	3,960
2017	3,545	3,242
Prior	119,168	130,600
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	156,058	169,004
Consumer | Residential Real Estate | Nonperforming | Residential real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	4,468
2020	5,313	21,702
2019	24,607	21,424
2018	22,101	21,167
2017	23,232	24,964
Prior	202,241	187,781
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	277,494	281,506
Consumer | Residential Real Estate | Nonperforming | Equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	47,569	45,079
Recorded Investment of Revolving Loans Converted to Term Loans	147	151
Total	47,716	45,230
Consumer | Residential Real Estate | Nonperforming | Equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	789
2020	55	375
2019	107	484
2018	516	134
2017	133	0
Prior	8,340	8,976
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	9,151	10,758
Consumer | Consumer | Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	812,242	881,702
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	812,242	881,702
Consumer | Consumer | Consumer direct
Financing Receivable, Credit Quality Indicator [Line Items]
2021	156,787	548,637
2020	466,913	430,799
2019	355,599	357,513
2018	290,009	99,410
2017	80,966	43,812
Prior	44,041	14,806
Recorded Investment of Revolving Loans	402,770	434,746
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	1,797,085	1,929,723
Consumer | Consumer | Consumer indirect
Financing Receivable, Credit Quality Indicator [Line Items]
2021	568,797	1,819,541
2020	1,670,277	1,119,269
2019	986,922	755,599
2018	650,035	311,449
2017	264,207	96,000
Prior	126,098	75,267
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	4,266,336	4,177,125
Consumer | Consumer | Performing | Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	789,395	859,749
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	789,395	859,749
Consumer | Consumer | Performing | Consumer direct
Financing Receivable, Credit Quality Indicator [Line Items]
2021	156,787	547,417
2020	462,219	426,921
2019	351,468	349,518
2018	283,514	97,085
2017	79,054	43,170
Prior	43,284	14,617
Recorded Investment of Revolving Loans	399,322	432,167
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	1,775,648	1,910,895
Consumer | Consumer | Performing | Consumer indirect
Financing Receivable, Credit Quality Indicator [Line Items]
2021	568,797	1,817,720
2020	1,667,436	1,112,510
2019	979,931	745,483
2018	640,659	305,658
2017	259,239	92,924
Prior	121,830	73,051
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	4,237,892	4,147,346
Consumer | Consumer | Nonperforming | Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Recorded Investment of Revolving Loans	22,847	21,953
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	22,847	21,953
Consumer | Consumer | Nonperforming | Consumer direct
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,220
2020	4,694	3,878
2019	4,131	7,995
2018	6,495	2,325
2017	1,912	642
Prior	757	189
Recorded Investment of Revolving Loans	3,448	2,579
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	21,437	18,828
Consumer | Consumer | Nonperforming | Consumer indirect
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,821
2020	2,841	6,759
2019	6,991	10,116
2018	9,376	5,791
2017	4,968	3,076
Prior	4,268	2,216
Recorded Investment of Revolving Loans	0	0
Recorded Investment of Revolving Loans Converted to Term Loans	0	0
Total	$ 28,444	$ 29,779

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 1,300,882	$ 1,331,230
Accruing TDRs	200,289	114,890
Total Past Due, Nonaccrual or TDR	1,793,270	1,827,308
Not Past Due, Nonaccrual or TDR	62,166,972	63,732,459
Total	63,960,242	65,559,767
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	125,409	166,937
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	66,285	92,681
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	100,405	121,570
Commercial, Financial and Agricultural
Financing Receivable, Past Due [Line Items]
Nonaccrual	529,703	540,741
Accruing TDRs	77,466	17,686
Total Past Due, Nonaccrual or TDR	656,289	632,330
Not Past Due, Nonaccrual or TDR	25,312,956	25,972,812
Total	25,969,245	26,605,142
Commercial, Financial and Agricultural | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	17,433	15,862
Commercial, Financial and Agricultural | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	19,078	22,569
Commercial, Financial and Agricultural | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	12,609	35,472
Commercial Real Estate | Real estate – construction
Financing Receivable, Past Due [Line Items]
Nonaccrual	25,265	25,316
Accruing TDRs	142	145
Total Past Due, Nonaccrual or TDR	28,477	29,762
Not Past Due, Nonaccrual or TDR	2,367,527	2,468,569
Total	2,396,004	2,498,331
Commercial Real Estate | Real estate – construction | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	2,538	3,595
Commercial Real Estate | Real estate – construction | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	174
Commercial Real Estate | Real estate – construction | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	532	532
Commercial Real Estate | Commercial real estate – mortgage
Financing Receivable, Past Due [Line Items]
Nonaccrual	418,935	442,137
Accruing TDRs	26,746	910
Total Past Due, Nonaccrual or TDR	454,427	448,268
Not Past Due, Nonaccrual or TDR	12,957,845	13,117,046
Total	13,412,272	13,565,314
Commercial Real Estate | Commercial real estate – mortgage | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	703	2,113
Commercial Real Estate | Commercial real estate – mortgage | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	253	2,004
Commercial Real Estate | Commercial real estate – mortgage | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	7,790	1,104
Residential Real Estate | Residential real estate – mortgage
Financing Receivable, Past Due [Line Items]
Nonaccrual	235,441	235,463
Accruing TDRs	53,568	53,380
Total Past Due, Nonaccrual or TDR	390,610	404,743
Not Past Due, Nonaccrual or TDR	12,433,031	12,923,031
Total	12,823,641	13,327,774
Residential Real Estate | Residential real estate – mortgage | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	40,315	49,445
Residential Real Estate | Residential real estate – mortgage | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	19,696	20,694
Residential Real Estate | Residential real estate – mortgage | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	41,590	45,761
Residential Real Estate | Equity lines of credit
Financing Receivable, Past Due [Line Items]
Nonaccrual	45,744	42,606
Accruing TDRs	0	0
Total Past Due, Nonaccrual or TDR	58,683	60,643
Not Past Due, Nonaccrual or TDR	2,259,525	2,334,251
Total	2,318,208	2,394,894
Residential Real Estate | Equity lines of credit | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	8,325	11,108
Residential Real Estate | Equity lines of credit | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	2,642	4,305
Residential Real Estate | Equity lines of credit | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	1,972	2,624
Residential Real Estate | Equity loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	8,844	10,167
Accruing TDRs	19,326	19,606
Total Past Due, Nonaccrual or TDR	29,192	31,750
Not Past Due, Nonaccrual or TDR	136,017	148,012
Total	165,209	179,762
Residential Real Estate | Equity loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	665	1,417
Residential Real Estate | Equity loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	223	243
Residential Real Estate | Equity loans | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	134	317
Consumer | Credit card
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	0
Accruing TDRs	0	0
Total Past Due, Nonaccrual or TDR	37,667	44,291
Not Past Due, Nonaccrual or TDR	774,575	837,411
Total	812,242	881,702
Consumer | Credit card | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	8,378	12,147
Consumer | Credit card | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	6,442	10,191
Consumer | Credit card | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	22,847	21,953
Consumer | Consumer direct
Financing Receivable, Past Due [Line Items]
Nonaccrual	13,098	10,087
Accruing TDRs	23,041	23,163
Total Past Due, Nonaccrual or TDR	70,944	83,617
Not Past Due, Nonaccrual or TDR	1,726,141	1,846,106
Total	1,797,085	1,929,723
Consumer | Consumer direct | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	17,028	24,076
Consumer | Consumer direct | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	9,438	17,550
Consumer | Consumer direct | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	8,339	8,741
Consumer | Consumer indirect
Financing Receivable, Past Due [Line Items]
Nonaccrual	23,852	24,713
Accruing TDRs	0	0
Total Past Due, Nonaccrual or TDR	66,981	91,904
Not Past Due, Nonaccrual or TDR	4,199,355	4,085,221
Total	4,266,336	4,177,125
Consumer | Consumer indirect | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	30,024	47,174
Consumer | Consumer indirect | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	8,513	14,951
Consumer | Consumer indirect | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	$ 4,592	$ 5,066

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Classified as troubled debt restructurings (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)Contract	Mar. 31, 2020USD ($)Contract
Commercial, Financial and Agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	10	10
Post-Modification Outstanding Recorded Investment | $	$ 109,107	$ 41,238
Number of subsequent default contracts | Contract	0	0
Recorded investment at subsequent default | $	$ 0	$ 0
Commercial Real Estate | Real estate – construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	1	0
Post-Modification Outstanding Recorded Investment | $	$ 18,056	$ 0
Number of subsequent default contracts | Contract	0	0
Recorded investment at subsequent default | $	$ 0	$ 0
Commercial Real Estate | Commercial real estate – mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	10	2
Post-Modification Outstanding Recorded Investment | $	$ 196,993	$ 1,740
Number of subsequent default contracts | Contract	0	0
Recorded investment at subsequent default | $	$ 0	$ 0
Residential Real Estate | Residential real estate – mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	21	8
Post-Modification Outstanding Recorded Investment | $	$ 6,542	$ 844
Number of subsequent default contracts | Contract	2	1
Recorded investment at subsequent default | $	$ 855	$ 84
Residential Real Estate | Equity lines of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	3	1
Post-Modification Outstanding Recorded Investment | $	$ 154	$ 36
Number of subsequent default contracts | Contract	0	0
Recorded investment at subsequent default | $	$ 0	$ 0
Residential Real Estate | Equity loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	5	1
Post-Modification Outstanding Recorded Investment | $	$ 554	$ 192
Number of subsequent default contracts | Contract	1	0
Recorded investment at subsequent default | $	$ 43	$ 0
Consumer | Credit card
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	0	0
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 0
Number of subsequent default contracts | Contract	0	0
Recorded investment at subsequent default | $	$ 0	$ 0
Consumer | Consumer direct
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	37	89
Post-Modification Outstanding Recorded Investment | $	$ 1,527	$ 4,762
Number of subsequent default contracts | Contract	0	4
Recorded investment at subsequent default | $	$ 0	$ 217
Consumer | Consumer indirect
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	0	0
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 0
Number of subsequent default contracts | Contract	0	0
Recorded investment at subsequent default | $	$ 0	$ 0

Loan Sales and Servicing - Narr

Loan Sales and Servicing - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 295,570		$ 236,586
Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans transferred from held for investment to held for sale	0	$ 0
Loans and loans held for sale sold	0	$ 0
Residential Real Estate | Residential real estate – mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 296,000		$ 237,000

Loan Sales and Servicing - Sale

Loan Sales and Servicing - Sales in the Secondary Market (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains recognized on sales of residential real estate loans originated for sale in the secondary market		$ 18,347	$ 8,775
Originated For Sale In The Secondary Market
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate loans originated for sale in the secondary market sold	[1]	347,513	203,830
Net gains recognized on sales of residential real estate loans originated for sale in the secondary market	[2]	18,347	8,775
Servicing fees recognized	[2]	$ 2,434	$ 2,608
[1]	The Company has retained servicing responsibilities for all loans sold that were originated for sale in the secondary market.
[2]	Recorded as a component of mortgage banking income in the Company's Unaudited Condensed Consolidated Statements of Income.

Loan Sales and Servicing - Real

Loan Sales and Servicing - Real Estate Mortgages Sold With Retained Servicing (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
MSRs		$ 41,432	$ 30,665
Residential Real Estate Mortgage Loans Sold with Retained Servicing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded balance of residential real estate mortgage loans sold with retained servicing	[1]	4,338,556	4,425,180
MSRs	[2]	$ 41,432	$ 30,665
[1]	These loans are not included in loans on the Company's Unaudited Condensed Consolidated Balance Sheets.
[2]	Recorded under the fair value method and included in other assets on the Company's Unaudited Condensed Consolidated Balance Sheets.

Loan Sales and Servicing - Resi

Loan Sales and Servicing - Residential MSRs (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		$ 30,665
Increase (decrease) in fair value:
Ending balance		41,432
Residential Mortgage
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		30,665	$ 42,022
Additions		3,985	1,671
Increase (decrease) in fair value:
Due to changes in valuation inputs or assumptions		9,832	(10,140)
Due to other changes in fair value	[1]	(3,050)	(2,321)
Ending balance		$ 41,432	$ 31,232
[1]	Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time.

Loan Sales and Servicing - Valu

Loan Sales and Servicing - Valuation Assumptions (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]
Fair value of MSRs	$ 41,432	$ 30,665
Composition of residential loans serviced for others, percentage	100.00%	100.00%
Weighted average life (in years)	4 years 4 months 24 days	3 years 7 months 6 days
Prepayment speed:	29.00%	30.40%
Effect on fair value of a 10% increase	$ (1,687)	$ (1,620)
Effect on fair value of a 20% increase	$ (3,797)	$ (3,585)
Weighted average option adjusted spread:	6.20%	6.20%
Effect on fair value of a 10% increase	$ (1,009)	$ (656)
Effect on fair value of a 20% increase	$ (1,974)	$ (1,285)
Fixed rate mortgage loans
Servicing Assets at Fair Value [Line Items]
Composition of residential loans serviced for others, percentage	98.70%	98.50%
Adjustable rate mortgage loans
Servicing Assets at Fair Value [Line Items]
Composition of residential loans serviced for others, percentage	1.30%	1.50%

Derivatives and Hedging - Deriv

Derivatives and Hedging - Derivatives by Balance Sheet Location (Details) - USD ($) $ in Thousands		Mar. 31, 2021		Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative assets		$ 46,117		$ 38,554
Derivative liabilities		112,079		153,524
Derivatives designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	9,656		11,635
Derivative liabilities	[2]	1,620		2,875
Derivatives designated as hedging instrument | Fair value hedges
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	9,656		11,635
Derivative liabilities	[2]	375		748
Derivatives designated as hedging instrument | Fair value hedges | Interest rate swaps related to long-term debt
Derivatives, Fair Value [Line Items]
Derivative, notional amount		3,496,086		3,496,086
Derivative assets	[1]	9,656		11,635
Derivative liabilities	[2]	375		748
Derivatives designated as hedging instrument | Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	0		0
Derivative liabilities	[2]	1,245		2,127
Derivatives designated as hedging instrument | Cash flow hedges | Swaps related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		10,000,000		10,000,000
Derivative assets	[1]	0		0
Derivative liabilities	[2]	0		0
Derivatives designated as hedging instrument | Cash flow hedges | Swaps related to FHLB advances
Derivatives, Fair Value [Line Items]
Derivative, notional amount		120,000		120,000
Derivative assets	[1]	0		0
Derivative liabilities	[2]	1,181		2,108
Derivatives designated as hedging instrument | Cash flow hedges | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount		3,088		4,102
Derivative assets	[1]	0		0
Derivative liabilities	[2]	64		19
Free-standing derivatives not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	481,674		674,721
Derivative liabilities	[2]	167,900		183,069
Free-standing derivatives not designated as hedging instrument | Forward contracts related to held for sale mortgages
Derivatives, Fair Value [Line Items]
Derivative, notional amount		834,280		861,061
Derivative assets	[1]	7,726		1,184
Derivative liabilities	[2]	573		5,193
Free-standing derivatives not designated as hedging instrument | Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative, notional amount		421,906		520,481
Derivative assets	[1]	8,091		17,897
Derivative liabilities	[2]	151		0
Free-standing derivatives not designated as hedging instrument | Purchased equity option related to equity-linked CDs
Derivatives, Fair Value [Line Items]
Derivative, notional amount		30,219		40,253
Derivative assets	[1]	304		574
Derivative liabilities		0	[2]	0
Free-standing derivatives not designated as hedging instrument | Written equity option related to equity-linked CDs
Derivatives, Fair Value [Line Items]
Derivative, notional amount		24,259		32,507
Derivative assets	[1]	0		0
Derivative liabilities	[2]	244		468
Free-standing derivatives not designated as hedging instrument | Forwards and swaps related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		471,739		578,484
Derivative assets	[1]	5,881		1,635
Derivative liabilities	[2]	1,746		7,424
Free-standing derivatives not designated as hedging instrument | Spots related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		79,755		47,564
Derivative assets	[1]	24		124
Derivative liabilities	[2]	34		38
Free-standing derivatives not designated as hedging instrument | Swap associated with sale of Visa, Inc. Class B shares
Derivatives, Fair Value [Line Items]
Derivative, notional amount		183,292		189,352
Derivative assets	[1]	0		0
Derivative liabilities	[2]	6,408		6,517
Free-standing derivatives not designated as hedging instrument | Futures contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount	[3]	0		200,000
Derivative assets	[1],[3]	0		0
Derivative liabilities	[2],[3]	0		0
Free-standing derivatives not designated as hedging instrument | Total trading account assets and liabilities
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	459,648		653,307
Derivative liabilities	[2]	158,744		163,429
Free-standing derivatives not designated as hedging instrument | Interest rate contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		37,158,642		38,305,700
Derivative assets	[1]	422,427		616,566
Derivative liabilities	[2]	123,551		128,831
Free-standing derivatives not designated as hedging instrument | Foreign exchange contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		1,664,768		1,448,123
Derivative assets	[1]	37,221		36,741
Derivative liabilities	[2]	$ 35,193		$ 34,598
[1]	Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets.
[2]	Derivative liabilities are recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets.
[3]	Changes in fair value are cash settled daily; therefore, there is no ending balance at any given reporting period.

Derivatives and Hedging - Fair

Derivatives and Hedging - Fair Value Hedges (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) related to hedge, firm commitments no longer qualifying as a fair value hedge	$ 0	$ 0
Derivatives designated as hedging instrument | Fair value hedges | Interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges, weighted average expected remaining term	2 years 2 months 12 days
Long-term debt
Derivative Instruments, Gain (Loss) [Line Items]
Carrying amount of hedging liabilities	$ 3,261,916,000		$ 3,260,644,000
Cumulative amount of fair value hedging adjustment included in the carrying amount of hedged liabilities - Hedged items currently designated	74,942,000		107,023,000
Cumulative amount of fair value hedging adjustment included in the carrying amount of hedged liabilities - Hedged items no longer designated	$ 1,113,000		$ 1,168,000

Derivatives and Hedging - Cash

Derivatives and Hedging - Cash Flow Hedges (Details) - USD ($)		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the unaudited condensed consolidated statements of income		$ 606,407,000	$ 715,476,000
Total amounts presented in the unaudited condensed consolidated statements of income		$ 14,516,000	21,176,000
Derivatives designated as hedging instrument | Fair value hedges | Interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges, weighted average expected remaining term		2 years 2 months 12 days
Derivatives designated as hedging instrument | Cash flow hedges | Interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on discontinuation of interest rate cash flow hedge due to forecasted transaction probable of not occurring, net		$ 0	0
Cash flow hedges not terminated, net fair value		$ (1,000,000)
Cash flow hedges, weighted average expected remaining term		1 year 10 months 24 days
Cash flow hedge gain (loss) to be reclassified within twelve months		$ 175,800,000
Maximum length of time hedged in interest rate cash flow hedge		2 years 10 months 24 days
Interest and Fees on Loans
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the unaudited condensed consolidated statements of income		$ 606,407,000	715,476,000
Interest and Fees on Loans | Derivatives designated as hedging instrument | Fair value hedges
Gains (losses) on fair value hedging relationships:
Net income (expense) recognized on fair value hedges		0	0
Interest and Fees on Loans | Derivatives designated as hedging instrument | Fair value hedges | Interest rate contracts
Gains (losses) on fair value hedging relationships:
Amounts related to interest settlements and amortization on derivatives		0	0
Recognized on derivatives		0	0
Recognized on hedged items		0	0
Interest and Fees on Loans | Derivatives designated as hedging instrument | Cash flow hedges
Gain (losses) on cash flow hedging relationships:
Net income (expense) recognized on cash flow hedges	[1]	44,774,000	5,459,000
Interest and Fees on Loans | Derivatives designated as hedging instrument | Cash flow hedges | Interest rate contracts
Gain (losses) on cash flow hedging relationships:
Realized losses reclassified from AOCI into net income	[1],[2]	44,774,000	5,459,000
Interest on FHLB and other borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the unaudited condensed consolidated statements of income		14,516,000	21,176,000
Interest on FHLB and other borrowings | Derivatives designated as hedging instrument | Fair value hedges
Gains (losses) on fair value hedging relationships:
Net income (expense) recognized on fair value hedges		12,103,000	10,138,000
Interest on FHLB and other borrowings | Derivatives designated as hedging instrument | Fair value hedges | Interest rate contracts
Gains (losses) on fair value hedging relationships:
Amounts related to interest settlements and amortization on derivatives		13,188,000	3,365,000
Recognized on derivatives		(33,159,000)	105,944,000
Recognized on hedged items		32,074,000	(99,171,000)
Interest on FHLB and other borrowings | Derivatives designated as hedging instrument | Cash flow hedges
Gain (losses) on cash flow hedging relationships:
Net income (expense) recognized on cash flow hedges	[1]	(914,000)	(419,000)
Interest on FHLB and other borrowings | Derivatives designated as hedging instrument | Cash flow hedges | Interest rate contracts
Gain (losses) on cash flow hedging relationships:
Realized losses reclassified from AOCI into net income	[1],[2]	$ (914,000)	$ (419,000)
[1]	See Note 9, Comprehensive Income, for gain or loss recognized for cash flow hedges in accumulated other comprehensive income.
[2]	Pre-tax

Derivatives and Hedging - Free

Derivatives and Hedging - Free Standing Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Futures contracts | Mortgage banking income and corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 6	$ (793)
Interest rate lock commitments | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(9,957)	9,322
Option contracts related to mortgage servicing rights | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	0	1,528
Forward contracts related to residential mortgage loans held for sale | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	11,162	(5,907)
Interest rate contracts for customers | Corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	7,395	4,137
Purchased equity option related to equity-linked CDs | Other expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(270)	(1,888)
Written equity option related to equity-linked CDs | Other expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	224	1,624
Forward and swap contracts related to commercial loans | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	7,095	25,981
Spot contracts related to commercial loans | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(2,179)	771
Foreign currency exchange contracts for customers | Corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 6,082	$ 4,701

Derivatives and Hedging - Credi

Derivatives and Hedging - Credit and Market Risks (Details) - USD ($)		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivatives [Line Items]
Derivative assets		$ 46,117,000		$ 38,554,000
Derivative, collateral, right to reclaim cash	[1]	112,079,000		153,524,000
Derivative, collateral, obligation to return	[1]	13,195,000		3,771,000
Other assets
Derivatives [Line Items]
Derivative, collateral, right to reclaim cash		163,000,000		199,000,000
Deposits
Derivatives [Line Items]
Derivative, collateral, obligation to return		23,000,000		14,000,000
Free-standing derivatives not designated as hedging instrument
Derivatives [Line Items]
Derivative assets	[2]	481,674,000		674,721,000
Free-standing derivatives not designated as hedging instrument | Interest rate swap
Derivatives [Line Items]
Derivative assets		460,000,000
Gain (loss) on derivative instruments held for trading purposes, net		0	$ 0
Gain (loss) on derivative instruments held for non-trading purposes, net		0	$ 0
Derivatives designated as hedging instrument
Derivatives [Line Items]
Derivative assets	[2]	9,656,000		$ 11,635,000
Derivatives designated as hedging instrument | Interest rate swap | Over the counter
Derivatives [Line Items]
Credit risk derivatives, at fair value, net		$ 10,000,000
[1]	The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.
[2]	Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets.

Derivatives and Hedging - Conti

Derivatives and Hedging - Contingent Features (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, net liability position, aggregate fair value	$ 50	$ 66
Collateral already posted, aggregate fair value	48	64
Additional collateral, aggregate fair value	$ 2	$ 2

Derivatives and Hedging - Netti

Derivatives and Hedging - Netting Arrangements (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Derivative financial assets:
Derivative assets, total derivatives subject to a master netting arrangement, gross amounts recognized		$ 46,117	$ 38,554
Derivative assets, total derivative subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheet		0	0
Derivative assets, total derivatives subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		46,117	38,554
Derivative assets, total derivatives subject to a master netting arrangement, financial instruments collateral received/pledged	[1]	0	0
Derivate assets, total derivatives subject to a master netting arrangement, cash collateral received/pledged	[1]	13,195	3,771
Derivative asset, total derivatives subject to a master netting arrangement, net amount		32,922	34,783
Derivative assets, total derivatives not subject to a master netting arrangement		445,213	647,802
Derivative assets, total derivatives not subject to a master netting arrangement, net amount		445,213	647,802
Total derivative financial assets, gross amounts recognized		491,330	686,356
Total derivative financial assets, net amount presented in the condensed consolidated balance sheet		491,330	686,356
Total derivative financial assets, net amount		478,135	682,585
Derivative financial liabilities:
Derivative liabilities, total derivative subject to a master netting arrangement, gross amounts recognized		112,079	153,524
Derivative liabilities, total derivative subject to a master netting arrangement, gross amount offset in the condensed consolidated balance sheets		0	0
Derivative liabilities, total derivative subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		112,079	153,524
Derivative liabilities, total derivatives subject to a master netting arrangement, financial instruments collateral received/pledged	[1]	0	0
Derivative liabilities, total derivative subject to a master netting arrangement, cash collateral received/pledged	[1]	112,079	153,524
Derivate liabilities, total derivatives subject to master netting arrangement, net amount		0	0
Derivative liabilities, total derivatives not subject to a master netting arrangement		57,441	32,420
Derivative liabilities, total derivatives not subject to a master netting arrangement, net amount		57,441	32,420
Derivative liabilities, total derivative financial liabilities, gross amount recognized		169,520	185,944
Total derivative financial liabilities, net amount presented in the condensed consolidated balance sheets		169,520	185,944
Total derivative financial liabilities, net amount		$ 57,441	$ 32,420
[1]	The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Securities Financing Activiti_3

Securities Financing Activities (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Securities purchased under agreements to resell
Securities purchased under agreements to resell, subject to master netting arrangement, gross amounts recognized		$ 3,367,186	$ 986,290
Securities purchased under agreements to resell, subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheets		2,400,665	798,097
Securities purchased under agreements to resell, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		966,521	188,193
Securities purchased under agreements to resell, subject to a master netting arrangement, financial instruments collateral received/ pledged	[1]	966,521	188,193
Securities purchased under agreements to resell, net amount		0	0
Securities sold under agreements to repurchase
Securities sold under agreements to repurchase, subject to a master netting arrangement, gross amounts recognized		3,367,001	982,575
Securities sold under agreements to repurchase, gross amounts offset in the condensed consolidated balance sheets		2,400,665	798,097
Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheet		966,336	184,478
Securities sold under agreements to repurchase, subject to a master netting arrangement, financial instruments collateral received/ pledged	[1]	966,336	184,478
Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount		0	0
Fair value of collateral received related to securities purchased under agreements to resell		3,300,000	966,000
Fair value of collateral pledged related to securities sold under agreements to repurchase		$ 3,300,000	$ 960,000
[1]	The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Securities Financing Activiti_4

Securities Financing Activities - Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	$ 3,367,001	$ 982,575
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	1,237,268	880,200
Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	872,063	0
30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	296,875	102,375
Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	960,795	0
U.S. Treasury and other U.S. government agencies
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	3,258,438	982,575
U.S. Treasury and other U.S. government agencies | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	1,128,705	880,200
U.S. Treasury and other U.S. government agencies | Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	872,063	0
U.S. Treasury and other U.S. government agencies | 30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	296,875	102,375
U.S. Treasury and other U.S. government agencies | Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	960,795	0
Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	108,563	0
Mortgage-backed securities | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	108,563	0
Mortgage-backed securities | Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0	0
Mortgage-backed securities | 30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0	0
Mortgage-backed securities | Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	$ 0	$ 0

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees - Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Guarantor Obligations [Line Items]
Commitments to extend credit	$ 28,216,551	$ 28,251,150
Financial Standby Letter of Credit
Guarantor Obligations [Line Items]
Standby and commercial letters of credit	$ 836,442	$ 853,450

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees - Narrative (Details) - USD ($) $ in Thousands	Jun. 27, 2018	Apr. 30, 2020	Dec. 31, 2017	Mar. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Loss contingency accrual				$ 3,000
Financial Standby Letter of Credit
Loss Contingencies [Line Items]
Letters of credit, deferred fees				7,000	$ 7,000
Maximum potential amount of future undiscounted payments Company could be required to make on outstanding standby letters of credit				$ 836,000	836,000
Financial Standby Letter of Credit | Minimum
Loss Contingencies [Line Items]
Standby and commercial letters of credit expiration term				1 year
Financial Standby Letter of Credit | Maximum
Loss Contingencies [Line Items]
Standby and commercial letters of credit expiration term				4 years
Potential Recourse Related to FNMA Securitizations | Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss				$ 18,000	18,000
Accrued Expenses and Other Liabilities | Financial Standby Letter of Credit
Loss Contingencies [Line Items]
Loss contingency accrual				134,000	150,000
Accrued Expenses and Other Liabilities | Potential Recourse Related to FNMA Securitizations
Loss Contingencies [Line Items]
Loss contingency accrual				693	693
Accrued Expenses and Other Liabilities | Standard Representations and Warranties Related to Loan Sales to Government-Sponsored Agencies
Loss Contingencies [Line Items]
Loss contingency accrual				$ 3,000	$ 2,700
Pending Litigation | Minimum | Zamora-Orduna Realty Group LLC v. BBVA USA
Loss Contingencies [Line Items]
Damages sought, value		$ 10,000
Settled Litigation | David S. Bagwell Trust, et al. v. BBVA USA, et al.
Loss Contingencies [Line Items]
Amount awarded to other party			$ 98,000
Damages awarded, value	$ 96,000

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Forward contracts
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) realized due to changes in fair value of loans	$ 11.2	$ (5.9)
Noninterest income | Residential mortgage loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) realized due to changes in fair value of loans	$ (6.3)	$ 2.6

Fair Value Measurements - Fair

Fair Value Measurements - Fair value of balance sheet items (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Debt securities available for sale	$ 5,408,087	$ 5,744,919
Derivative asset	491,330	686,356
Liabilities:
Derivative liabilities	169,520	185,944
U.S. Treasury and other U.S. government agencies
Assets:
Debt securities available for sale	2,064,210	2,146,904
Collateralized mortgage obligations
Assets:
Debt securities available for sale	2,545,512	2,731,731
State and political subdivisions
Assets:
Debt securities available for sale	561	636
Fair Value, measurements, recurring
Assets:
Trading account assets	561,187	762,449
Debt securities available for sale	5,408,087	5,744,919
Loans held for sale	295,570	236,586
Derivative asset	31,682	33,049
Liabilities:
Trading account liabilities	158,744	163,429
Derivative liabilities	4,368	15,998
Fair Value, measurements, recurring | Interest rate contracts
Assets:
Derivative asset	25,473	30,716
Liabilities:
Derivative liabilities	2,280	8,049
Fair Value, measurements, recurring | Equity contracts
Assets:
Derivative asset	304	574
Liabilities:
Derivative liabilities	244	468
Fair Value, measurements, recurring | Foreign exchange contracts
Assets:
Derivative asset	5,905	1,759
Liabilities:
Derivative liabilities	1,844	7,481
Fair Value, measurements, recurring | U.S. Treasury and other U.S. government agencies
Assets:
Trading account assets	101,539	109,142
Debt securities available for sale	2,064,210	2,146,904
Fair Value, measurements, recurring | Interest rate contracts
Assets:
Trading account assets	422,427	616,566
Liabilities:
Trading account liabilities	123,551	128,831
Fair Value, measurements, recurring | Foreign exchange contracts
Assets:
Trading account assets	37,221	36,741
Liabilities:
Trading account liabilities	35,193	34,598
Fair Value, measurements, recurring | Mortgage-backed securities
Assets:
Debt securities available for sale	797,804	865,648
Fair Value, measurements, recurring | Collateralized mortgage obligations
Assets:
Debt securities available for sale	2,545,512	2,731,731
Fair Value, measurements, recurring | State and political subdivisions
Assets:
Debt securities available for sale	561	636
Fair Value, measurements, recurring | Equity securities
Assets:
Other assets	16,473	14,032
Fair Value, measurements, recurring | Quoted Prices in Active Markets for Identical Assets, Level 1
Assets:
Trading account assets	101,539	109,142
Debt securities available for sale	1,637,944	1,694,160
Derivative asset	0	0
Liabilities:
Trading account liabilities	0	0
Fair Value, measurements, recurring | Quoted Prices in Active Markets for Identical Assets, Level 1 | Interest rate contracts
Assets:
Derivative asset	0	0
Fair Value, measurements, recurring | Quoted Prices in Active Markets for Identical Assets, Level 1 | U.S. Treasury and other U.S. government agencies
Assets:
Trading account assets	101,539	109,142
Debt securities available for sale	1,637,944	1,694,160
Fair Value, measurements, recurring | Quoted Prices in Active Markets for Identical Assets, Level 1 | Equity securities
Assets:
Other assets	16,473	14,032
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2
Assets:
Trading account assets	459,648	653,307
Debt securities available for sale	3,770,143	4,050,759
Loans held for sale	295,570	236,586
Derivative asset	23,591	15,152
Liabilities:
Trading account liabilities	158,744	163,429
Derivative liabilities	4,217	15,998
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Interest rate contracts
Assets:
Derivative asset	17,382	12,819
Liabilities:
Derivative liabilities	2,129	8,049
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Equity contracts
Assets:
Derivative asset	304	574
Liabilities:
Derivative liabilities	244	468
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Foreign exchange contracts
Assets:
Derivative asset	5,905	1,759
Liabilities:
Derivative liabilities	1,844	7,481
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | U.S. Treasury and other U.S. government agencies
Assets:
Trading account assets	0
Debt securities available for sale	426,266	452,744
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Interest rate contracts
Assets:
Trading account assets	422,427	616,566
Liabilities:
Trading account liabilities	123,551	128,831
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Foreign exchange contracts
Assets:
Trading account assets	37,221	36,741
Liabilities:
Trading account liabilities	35,193	34,598
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Mortgage-backed securities
Assets:
Debt securities available for sale	797,804	865,648
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | Collateralized mortgage obligations
Assets:
Debt securities available for sale	2,545,512	2,731,731
Fair Value, measurements, recurring | Significant Other Observable Inputs, Level 2 | State and political subdivisions
Assets:
Debt securities available for sale	561	636
Fair Value, measurements, recurring | Fair Value, Inputs, Level 3
Assets:
Trading account assets	0	0
Debt securities available for sale	0	0
Derivative asset	8,091	17,897
Liabilities:
Derivative liabilities	151	0
Fair Value, measurements, recurring | Fair Value, Inputs, Level 3 | Interest rate contracts
Assets:
Derivative asset	8,091	17,897
Liabilities:
Derivative liabilities	151	0
Fair Value, measurements, recurring | Fair Value, Inputs, Level 3 | Interest rate contracts
Assets:
Derivative asset	7,940	17,897
Other assets, MSR investments | Fair Value, measurements, recurring
Assets:
Other assets	41,432	30,665
Other assets, MSR investments | Fair Value, measurements, recurring | Fair Value, Inputs, Level 3
Assets:
Other assets	41,432	30,665
Other assets - SBIC investments | Fair Value, measurements, recurring
Assets:
Other assets	198,200	162,578
Other assets - SBIC investments | Fair Value, measurements, recurring | Fair Value, Inputs, Level 3
Assets:
Other assets	$ 198,200	$ 162,578

Fair Value Measurements - Asset

Fair Value Measurements - Assets measured on a recurring basis (Details) - Fair Value, measurements, recurring - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		$ 17,897	$ 3,088
Total gains or losses (realized/unrealized):
Included in earnings	[1]	(9,957)	9,322
Purchases, issuances, sales and settlements:
Balance, end of year		7,940	12,410
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		(9,957)	9,322
Other assets - MSRs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		30,665	42,022
Total gains or losses (realized/unrealized):
Included in earnings	[1]	6,782	(12,461)
Purchases, issuances, sales and settlements:
Issuances		3,985	1,671
Balance, end of year		41,432	31,232
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		6,782	(12,461)
Other assets - SBIC investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		162,578	119,475
Total gains or losses (realized/unrealized):
Included in earnings	[1]	21,376	27,658
Purchases, issuances, sales and settlements:
Purchases			9,267
Balance, end of year		198,200	156,400
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		$ 21,376	$ 27,658
[1]	Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets measured on nonrecurring basis (Details) - Fair Value, measurements, nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO, fair value	$ 10,965	$ 21,392
OREO, total gains (losses)	(450)	(707)
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO, fair value	$ 10,965	$ 21,392

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative information about unobservable inputs for material assets and liabilities measured using fair value (Details)		Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset		$ 491,330,000	$ 686,356,000
Fair Value, measurements, recurring
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset		31,682,000	33,049,000
Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset		8,091,000	17,897,000
Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Interest rate contracts
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset		7,940,000	17,897,000
Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Other assets - MSRs
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets		41,432,000	30,665,000
Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Other assets - SBIC investments
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets		198,200,000	162,578,000
Fair Value, Inputs, Level 3 | Fair Value, measurements, nonrecurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other real estate owned		$ 10,965,000	$ 11,448,000
Closing ratios (pull-through) | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Minimum | Interest rate contracts | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset, measurement input		0.048	0.182
Closing ratios (pull-through) | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Maximum | Interest rate contracts | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset, measurement input		0.998	1
Closing ratios (pull-through) | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Weighted Average | Interest rate contracts | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset, measurement input		0.644	0.625
Cap grids | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Minimum | Interest rate contracts | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset, measurement input		0.005	0.003
Cap grids | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Maximum | Interest rate contracts | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset, measurement input		0.025	0.026
Cap grids | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Weighted Average | Interest rate contracts | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative asset, measurement input		0.012	0.010
Option adjusted spread | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Minimum | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, measurement input		0.060	0.060
Option adjusted spread | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Maximum | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, measurement input		0.083	0.083
Option adjusted spread | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Weighted Average | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, measurement input		0.062	0.062
Constant prepayment rate or life speed | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Minimum | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, measurement input		0.001	0.035
Constant prepayment rate or life speed | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Maximum | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, measurement input		0.971	0.903
Constant prepayment rate or life speed | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Weighted Average | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, measurement input		0.136	0.199
Cost to service | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Minimum | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, cost to service, measurement input		$ 65	$ 65
Cost to service | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Maximum | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, cost to service, measurement input		4,000	4,000
Cost to service | Fair Value, Inputs, Level 3 | Fair Value, measurements, recurring | Weighted Average | Other assets - MSRs | Income approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other assets, cost to service, measurement input		$ 100	$ 100
Appraised value | Fair Value, Inputs, Level 3 | Fair Value, measurements, nonrecurring | Weighted Average | OREO | Market approach
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other real estate owned, measurement input	[1]	0.080	0.080
[1]	Represents discount to appraised value for estimated costs to sell.

Fair Value Measurements - Carry

Fair Value Measurements - Carrying value and estimated fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Assets:
Cash and cash equivalents	$ 15,142,724	$ 14,607,908	$ 5,513,268
Debt securities held to maturity	12,341,963	10,552,123
Held-to-maturity securities, fair value	12,497,012	10,809,461
Loans	63,960,242	65,559,767
Liabilities:
Deposits	85,970,954	85,858,381
Fair Value, Inputs, Level 1
Assets:
Cash and cash equivalents, estimated fair value	15,142,724	14,607,908
Held-to-maturity securities, fair value	2,619,569	1,404,868
Fair Value, Inputs, Level 2
Assets:
Held-to-maturity securities, fair value	9,337,935	8,837,070
Liabilities:
Deposits, estimated fair value	85,979,097	85,872,252
FHLB and other borrowings, estimated fair value	3,512,568	3,489,951
Federal funds purchased and securities sold under agreements to repurchase, estimated fair value	966,336	184,478
Fair Value, Inputs, Level 3
Assets:
Held-to-maturity securities, fair value	539,508	567,523
Loans, net, estimated fair value	62,435,802	64,459,914
Reported value measurement
Assets:
Cash and cash equivalents	15,142,724	14,607,908
Debt securities held to maturity	12,341,963	10,552,123
Loans	63,960,242	65,559,767
Liabilities:
Deposits	85,970,954	85,858,381
FHLB and other borrowings	3,517,567	3,548,492
Federal funds purchased and securities sold under agreements to repurchase	966,336	184,478
Estimate of fair value measurement
Assets:
Cash and cash equivalents, estimated fair value	15,142,724	14,607,908
Held-to-maturity securities, fair value	12,497,012	10,809,461
Loans, net, estimated fair value	62,435,802	64,459,914
Liabilities:
Deposits, estimated fair value	85,979,097	85,872,252
FHLB and other borrowings, estimated fair value	3,512,568	3,489,951
Federal funds purchased and securities sold under agreements to repurchase, estimated fair value	$ 966,336	$ 184,478

Fair Value Measurements - Unpai

Fair Value Measurements - Unpaid Principle Balances (Details) - Residential mortgage loans held for sale - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 295,570	$ 236,586
Aggregate Unpaid Principal Balance	289,222	223,929
Difference	$ 6,348	$ 12,657

Comprehensive Income - Changes

Comprehensive Income - Changes in Components of OCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Comprehensive Income (Loss), Pretax [Abstract]
Other comprehensive (loss) income	$ (85,089)	$ 477,292
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Other comprehensive (loss) income	(20,190)	113,881
Other Comprehensive Income (Loss), After-Tax [Abstract]
Change in unamortized net holding gains on debt securities held to maturity	(1,900)	(1,575)
Change in unamortized non-credit related impairment on debt securities held to maturity	(140)	(118)
Change in defined benefit plans	2,711	(1,754)
Other comprehensive (loss) income, net of tax	(64,899)	363,411
Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding (losses) gains arising during period from debt securities available for sale	(18,139)	99,699
Less: reclassification adjustment for net gains on sale of debt securities in net income	(1,900)	12,997
Other comprehensive (loss) income, net of tax	(16,239)	86,702
Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Other Comprehensive Income (Loss), Pretax [Abstract]
Other comprehensive (loss) income	(60,428)	360,963
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Other comprehensive (loss) income	(14,339)	86,126
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding (losses) gains arising during period from debt securities available for sale	(12,637)	278,675
Less: reclassification adjustment for net gains on sale of debt securities in net income	33,452	3,838
Other comprehensive (loss) income, net of tax	(46,089)	274,837
Defined Benefit Plan Adjustment
Other Comprehensive Income (Loss), Pretax [Abstract]
Change in defined benefit plans	(3,553)	2,301
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Change in defined benefit plans	(842)	547
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding (losses) gains arising during period from debt securities available for sale	0	0
Less: reclassification adjustment for net gains on sale of debt securities in net income	2,711	(1,754)
Change in defined benefit plans	(2,711)	1,754
Other comprehensive (loss) income, net of tax	(2,711)	1,754
Available-for-sale Securities | Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity
Other Comprehensive Income (Loss), Pretax [Abstract]
Unrealized holding (losses) gains arising during period from debt securities available for sale	(23,783)	130,943
Less: reclassification adjustment for net gains on sale of debt securities in net income	0	19,139
Other comprehensive (loss) income	(23,783)	111,804
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Unrealized holding (losses) gains arising during period from debt securities available for sale	(5,644)	31,244
Less: reclassification adjustment for net gains on sale of debt securities in net income	0	4,567
Other comprehensive (loss) income	(5,644)	26,677
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding (losses) gains arising during period from debt securities available for sale	(18,139)	99,699
Less: reclassification adjustment for net gains on sale of debt securities in net income	0	14,572
Other comprehensive (loss) income, net of tax	(18,139)	85,127
Held-to-maturity Securities | Change in unamortized net holding gains on debt securities held to maturity
Other Comprehensive Income (Loss), Pretax [Abstract]
Change in unamortized net holding gains on debt securities held to maturity	2,492	2,069
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Change in unamortized net holding gains on debt securities held to maturity	592	494
Other Comprehensive Income (Loss), After-Tax [Abstract]
Change in unamortized net holding gains on debt securities held to maturity	1,900	1,575
Held-to-maturity Securities | Change in unamortized non-credit related impairment on debt securities held to maturity
Other Comprehensive Income (Loss), Pretax [Abstract]
Change in unamortized non-credit related impairment on debt securities held to maturity	183	155
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Change in unamortized non-credit related impairment on debt securities held to maturity	43	37
Other Comprehensive Income (Loss), After-Tax [Abstract]
Change in unamortized non-credit related impairment on debt securities held to maturity	140	118
Held-to-maturity Securities | Unrealized Gains (Losses) on Debt Securities Held to Maturity
Other Comprehensive Income (Loss), Pretax [Abstract]
Other comprehensive (loss) income	2,675	2,224
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Other comprehensive (loss) income	635	531
Other Comprehensive Income (Loss), After-Tax [Abstract]
Other comprehensive (loss) income, net of tax	$ 2,040	$ 1,693

Comprehensive Income - AOCI (De

Comprehensive Income - AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 11,691,362	$ 13,386,589
Net current period other comprehensive income	(64,899)	363,411
Balance, end of period	12,019,055	11,358,354
Total
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period	329,105	(1,072)
Other comprehensive income before reclassifications	(30,776)	378,374
Amounts reclassified from accumulated other comprehensive (loss) income	(34,123)	(14,963)
Net current period other comprehensive income	(64,899)	363,411
Balance, end of period	264,206	362,339
Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period	64,542	(40,080)
Other comprehensive income before reclassifications	(18,139)	99,699
Amounts reclassified from accumulated other comprehensive (loss) income	1,900	(12,997)
Net current period other comprehensive income	(16,239)	86,702
Balance, end of period	48,303	46,622
Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period	306,310	91,445
Other comprehensive income before reclassifications	(12,637)	278,675
Amounts reclassified from accumulated other comprehensive (loss) income	(33,452)	(3,838)
Net current period other comprehensive income	(46,089)	274,837
Balance, end of period	260,221	366,282
Defined Benefit Plan Adjustment
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period	(36,450)	(46,666)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	(2,711)	1,754
Net current period other comprehensive income	(2,711)	1,754
Balance, end of period	(39,161)	(44,912)
Unamortized Impairment Losses on Debt Securities Held to Maturity
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period	(5,297)	(5,771)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	140	118
Net current period other comprehensive income	140	118
Balance, end of period	$ (5,157)	$ (5,653)

Comprehensive Income - Reclassi

Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net		$ 0	$ 19,139
Interest on debt securities held to maturity		63,060	41,102
Interest and fees on loans		606,407	715,476
Interest on FHLB and other borrowings		(14,516)	(21,176)
Income (loss) before income taxes, noncontrolling interest		469,121	(2,242,354)
Income tax (expense) benefit		(83,660)	5,069
Net income (loss)		385,461	(2,237,285)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	[1]	0	19,139
Interest on debt securities held to maturity	[1]	(2,492)	(2,069)
Income (loss) before income taxes, noncontrolling interest	[1]	(2,492)	17,070
Income tax (expense) benefit	[1]	592	(4,073)
Net income (loss)	[1]	(1,900)	12,997
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and fees on loans	[1]	44,774	5,459
Interest on FHLB and other borrowings	[1]	(914)	(419)
Income (loss) before income taxes, noncontrolling interest	[1]	43,860	5,040
Income tax (expense) benefit	[1]	(10,408)	(1,202)
Net income (loss)	[1]	33,452	3,838
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Defined Benefit Plan Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic expense	[1],[2]	3,553	(2,301)
Income tax (expense) benefit	[1]	(842)	547
Net income (loss)	[1]	2,711	(1,754)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Unamortized Impairment Losses on Debt Securities Held to Maturity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest on debt securities held to maturity	[1]	(183)	(155)
Income tax (expense) benefit	[1]	43	37
Net income (loss)	[1]	$ (140)	$ (118)
[1]	Amounts in parentheses indicate debits to the Unaudited Condensed Consolidated Statements of Income.
[2]	These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 17, Benefit Plans, in the Notes to the December 31, 2020, Consolidated Financial Statements for additional details).

Supplemental Disclosure for S_3

Supplemental Disclosure for Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Supplemental disclosures of cash flow information:
Interest paid	$ 9,992	$ 207,334
Net income taxes (refunded) paid	(1,955)	7,208
Operating cash flows from operating leases	12,923	12,499
Operating cash flows from finance leases	119	140
Financing cash flows from finance leases	444	414
Supplemental schedule of noncash activities:
Transfer of loans and loans held for sale to OREO	1,789	5,735
Right-of-use assets obtained in exchange for lease obligations- operating leases	5,145	17,568
Cash and cash equivalents	15,142,724	5,513,268	$ 14,607,908
Restricted cash in other assets	385,013	306,798
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 15,527,737	$ 5,820,066	$ 14,945,395	$ 7,156,689

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 664,268	$ 589,455
Allocated (credit) provision for credit losses	(120,142)	356,991
Noninterest income	303,701	334,242
Noninterest expense	618,990	2,809,060
Net income (loss) before income tax expense (benefit)	469,121	(2,242,354)
Income tax expense (benefit)	83,660	(5,069)
Net income (loss)	385,461	(2,237,285)
Less: net income attributable to noncontrolling interests	581	501
Net income (loss) attributable to BBVA USA Bancshares, Inc.	384,880	(2,237,786)
Average assets	105,140,201	96,356,113
Operating Segments | Commercial Banking and Wealth
Segment Reporting Information [Line Items]
Net interest income (expense)	312,218	291,282
Allocated (credit) provision for credit losses	(62,903)	130,982
Noninterest income	65,563	68,535
Noninterest expense	149,943	174,101
Net income (loss) before income tax expense (benefit)	290,741	54,734
Income tax expense (benefit)	61,056	11,494
Net income (loss)	229,685	43,240
Less: net income attributable to noncontrolling interests	179	116
Net income (loss) attributable to BBVA USA Bancshares, Inc.	229,506	43,124
Average assets	42,593,214	41,090,411
Operating Segments | Retail Banking
Segment Reporting Information [Line Items]
Net interest income (expense)	256,937	265,462
Allocated (credit) provision for credit losses	(3,980)	129,140
Noninterest income	115,713	130,702
Noninterest expense	307,550	305,257
Net income (loss) before income tax expense (benefit)	69,080	(38,233)
Income tax expense (benefit)	14,507	(8,029)
Net income (loss)	54,573	(30,204)
Less: net income attributable to noncontrolling interests	0	0
Net income (loss) attributable to BBVA USA Bancshares, Inc.	54,573	(30,204)
Average assets	17,472,177	18,632,122
Operating Segments | Corporate and Investment Banking
Segment Reporting Information [Line Items]
Net interest income (expense)	39,204	33,828
Allocated (credit) provision for credit losses	(40,987)	83,132
Noninterest income	43,081	40,135
Noninterest expense	49,465	61,395
Net income (loss) before income tax expense (benefit)	73,807	(70,564)
Income tax expense (benefit)	15,499	(14,819)
Net income (loss)	58,308	(55,745)
Less: net income attributable to noncontrolling interests	0	0
Net income (loss) attributable to BBVA USA Bancshares, Inc.	58,308	(55,745)
Average assets	7,636,021	8,272,714
Operating Segments | Treasury
Segment Reporting Information [Line Items]
Net interest income (expense)	113,769	(17,691)
Allocated (credit) provision for credit losses	39	(195)
Noninterest income	8,212	26,202
Noninterest expense	4,558	4,046
Net income (loss) before income tax expense (benefit)	117,384	4,660
Income tax expense (benefit)	24,651	979
Net income (loss)	92,733	3,681
Less: net income attributable to noncontrolling interests	387	396
Net income (loss) attributable to BBVA USA Bancshares, Inc.	92,346	3,285
Average assets	31,172,166	20,254,258
Corporate Support and Other
Segment Reporting Information [Line Items]
Net interest income (expense)	(57,860)	16,574
Allocated (credit) provision for credit losses	(12,311)	13,932
Noninterest income	71,132	68,668
Noninterest expense	107,474	2,264,261
Net income (loss) before income tax expense (benefit)	(81,891)	(2,192,951)
Income tax expense (benefit)	(32,053)	5,306
Net income (loss)	(49,838)	(2,198,257)
Less: net income attributable to noncontrolling interests	15	(11)
Net income (loss) attributable to BBVA USA Bancshares, Inc.	(49,853)	(2,198,246)
Average assets	$ 6,266,623	$ 8,106,608

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 16, 2017	Mar. 16, 2012
Related Party Transaction [Line Items]
Securities purchased under agreements to resell	$ 966,521,000		$ 188,193,000
Securities sold under agreements to repurchase	966,336,000		184,478,000
Preferred stock	229,475,000		229,475,000
Preferred stock dividends	3,143,000	$ 4,155,000
BBVA
Related Party Transaction [Line Items]
Securities purchased under agreements to resell	928,235,000		186,568,000
Securities sold under agreements to repurchase	3,291,000		6,426,000
BBVA | BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Revenue from related parties	5,000,000	4,100,000
Fees on agreements	10,500,000	9,900,000
Derivatives designated as hedging instrument | BBVA
Related Party Transaction [Line Items]
Derivative, notional amount	3,100,000,000		3,200,000,000
Free-standing derivatives not designated as hedging instrument | Free-standing derivative instruments – risk management and other purposes | BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	(29,565,000)		(44,958,000)
Preferred Stock | Series A Preferred Stock | BBVA
Related Party Transaction [Line Items]
Preferred stock	229,000,000		229,000,000
Preferred stock dividends	3,100,000	4,200,000
Cash flow hedges | Derivatives designated as hedging instrument | BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	(64,000)		(19,000)
Fair value hedges | BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	(375,000)		(748,000)
BSI | Revolving Credit Facility | Line of Credit | BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Due from related parties	0		$ 0	$ 450,000,000	$ 420,000,000
BSI | Uncommitted Demand Facility | Revolving Credit Facility | Line of Credit | BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Due from related parties				$ 1,000,000,000
BSI | Revolving Note and Cash Subordinated Agreement | BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Interest expense	$ 29,000	$ 55,000

Uncategorized Items - bbva-2021

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member