First Citizens BancShares (FCNCO) 10-Q 2 Nov 21 2021 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Entity Central Index Key	0000798941
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-16715
Entity Registrant Name	FIRST CITIZENS BANCSHARES INC /DE/
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	56-1528994
Entity Address, Address Line One	4300 Six Forks Road
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27609
City Area Code	(919)
Local Phone Number	716-7000
Title of 12(g) Security	Class B Common Stock, Par Value $1
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Class A Common Stock
Title of 12(b) Security	Class A Common Stock, Par Value $1
Trading Symbol	FCNCA
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		8,811,220
Class B Common Stock
Entity Common Stock, Shares Outstanding		1,005,185
Preferred Stock
Title of 12(b) Security	Depositary Shares, Each Representing a 1/40th Interest in a Share of 5.375% Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol	FCNCP
Security Exchange Name	NASDAQ

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 337,450	$ 362,048
Overnight investments	9,875,063	4,347,336
Investment in marketable equity securities	123,147	91,680
Debt Securities, Available-for-sale	7,371,129	7,014,243
Investment securities held to maturity at cost	3,381,078	2,816,982
Loans held for sale	98,451	124,837
Loans and leases	32,516,189	32,791,975
Allowance for loan and lease losses	(183,194)	(224,314)
Net loans and leases	32,332,995	32,567,661
Premises and equipment	1,230,572	1,251,283
Other real estate owned	40,649	50,890
Income earned not collected	132,911	145,694
Goodwill	350,298	350,298
Other intangible assets	44,142	50,775
Other assets	1,584,092	783,953
Total assets	56,901,977	49,957,680
Deposits [Abstract]
Noninterest-bearing deposits	21,514,407	18,014,029
Interest-bearing deposits	28,551,355	25,417,580
Total deposits	50,065,762	43,431,609
Securities sold under customer repurchase agreements	663,575	641,487
Less: Advances	645,663	655,175
Subordinated Debt	497,427	504,518
Other Borrowings	76,139	88,470
FDIC shared-loss payable	0	15,601
Other liabilities	372,116	391,552
Total liabilities	52,320,682	45,728,412
Shareholders' Equity
Preferred stock	339,937	339,937
Retained earnings	4,263,679	3,867,252
Accumulated other comprehensive loss	(32,137)	12,263
Total shareholders' equity	4,581,295	4,229,268
Total liabilities and shareholders' equity	56,901,977	49,957,680
Class A Common Stock
Shareholders' Equity
Common stock	8,811	8,811
Class B Common Stock
Shareholders' Equity
Common stock	$ 1,005	$ 1,005

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment in marketable equity securities at cost	$ 85,554	$ 84,837
Investment securities available for sale at cost	7,345,143	6,911,965
Investment securities held to maturity at fair value	$ 3,353,078	$ 2,838,499
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	345,000	345,000
Preferred stock, shares outstanding	345,000	345,000
Liquidation preference per share (in USD per share)	$ 1,000	$ 1,000
Class A Common Stock
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	16,000,000	16,000,000
Common stock, shares issued	8,811,220	8,811,220
Common stock, shares outstanding	8,811,220	8,811,220
Class B Common Stock
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	2,000,000	2,000,000
Common stock, shares issued	1,005,185	1,005,185
Common stock, shares outstanding	1,005,185	1,005,185

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income
Loans and leases	$ 319,214	$ 336,382	$ 966,525	$ 988,029
Investment securities interest and dividend income	39,246	37,195	105,530	113,293
Overnight investments	3,395	757	6,948	5,828
Total interest income	361,855	374,334	1,079,003	1,107,150
Interest expense
Deposits	8,073	13,468	25,408	55,578
Securities sold under customer repurchase agreements	358	395	1,052	1,236
Federal Home Loan Bank borrowings	2,114	2,156	6,300	7,612
Subordinated debt	4,174	4,351	12,543	11,783
Interest Expense, Other	249	305	768	1,488
Total interest expense	14,968	20,675	46,071	77,697
Net interest income	346,887	353,659	1,032,932	1,029,453
Provision (credit) for loan and lease losses	(1,120)	4,042	(31,697)	52,949
Net interest income after provision for loan and lease losses	348,007	349,617	1,064,629	976,504
Noninterest income
Mortgage income	6,106	13,106	25,026	28,141
Realized gains on investment securities available for sale, net	8,082	21,425	33,119	54,972
Realized gains on investment securities available for sale, net	3,350	(2,701)	31,015	10,461
Other	2,639	2,008	6,363	5,330
Total noninterest income	122,944	120,572	393,743	349,985
Noninterest expense
Salaries and wages	160,947	147,297	462,420	439,185
Employee benefits	32,146	31,788	103,169	100,663
Occupancy expense	29,101	27,990	87,283	85,026
Equipment expense	30,229	29,430	88,934	86,054
Processing fees paid to third parties	15,602	11,927	43,702	32,485
FDIC insurance expense	3,661	2,167	10,261	9,364
Collection and foreclosure-related expenses	836	2,168	3,207	10,171
Merger-related expenses	7,013	3,507	19,601	12,108
Other	33,283	35,388	91,745	108,256
Total noninterest expense	312,818	291,662	910,322	883,312
Income before income taxes	158,133	178,527	548,050	443,177
Income taxes	34,060	35,843	123,873	89,538
Net income	124,073	142,684	424,177	353,639
Preferred stock dividends	4,636	4,636	13,908	9,426
Net income available to common shareholders, basic	119,437	138,048	410,269	344,213
Net income available to common shareholders, diluted	$ 119,437	$ 138,048	$ 410,269	$ 344,213
Weighted average common shares outstanding, basic (in shares)	9,816,405	9,836,629	9,816,405	10,137,321
Weighted average common shares outstanding, diluted (in shares)	9,816,405	9,836,629	9,816,405	10,137,321
Earnings per common share, diluted	$ 12.17	$ 14.03	$ 41.79	$ 33.96
Earnings per common share, basic	$ 12.17	$ 14.03	$ 41.79	$ 33.96
Service charges on deposit accounts
Noninterest income
Revenue from contract with customers	$ 22,879	$ 19,756	$ 65,310	$ 55,503
Cardholder services, net
Noninterest income
Revenue from contract with customers	8,409	6,763	25,858	18,014
Wealth management services
Noninterest income
Revenue from contract with customers	31,935	26,369	95,886	75,152
Service charges on deposit accounts
Noninterest income
Revenue from contract with customers	24,858	20,841	68,277	64,776
ATM income
Noninterest income
Revenue from contract with customers	9,205	7,892	26,653	22,829
Marketable equity securities gains (losses), net
Noninterest income
Revenue from contract with customers	4,000	3,576	11,702	10,453
Gain on extinguishment of debt
Noninterest income
Revenue from contract with customers	$ 1,481	$ 1,537	$ 4,534	$ 4,354

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 124,073	$ 142,684	$ 424,177	$ 353,639
Unrealized (losses) gains on securities available for sale:
Unrealized (losses) gains on securities available for sale arising during the period	(11,270)	9,781	(43,173)	182,690
Tax effect	2,593	(2,251)	9,930	(42,019)
Reclassification adjustment for realized gains on securities available for sale included in income before income taxes	(8,082)	(21,425)	(33,119)	(54,972)
Tax effect	1,858	4,928	7,617	12,644
Total change in unrealized (losses) gains on securities available for sale, net of tax	(14,901)	(8,967)	(58,745)	98,343
Unrealized losses on securities available for sale transferred to held to maturity:
Reclassification adjustment for accretion of unrealized losses on securities available for sale transferred to held to maturity	(430)	0	(1,690)	0
Tax effect	99	0	389	0
Total change in unrealized losses on securities available for sale transferred to held to maturity, net of tax	(331)	0	(1,301)	0
Change in pension obligation:
Amortization of actuarial losses	6,773	6,332	20,320	18,994
Tax effect	(1,558)	(1,457)	(4,674)	(4,370)
Total change in pension obligation, net of tax	5,215	4,875	15,646	14,624
Net current period other comprehensive (loss) income	(10,017)	(4,092)	(44,400)	112,967
Total comprehensive income	$ 114,056	$ 138,592	$ 379,777	$ 466,606

Consolidated Statements of Chan

Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common StockClass A Common Stock	Common StockClass B Common Stock	Preferred Stock	Surplus	Retained Earnings	Retained EarningsClass A Common Stock	Retained EarningsClass B Common Stock	Accumulated Other Comprehensive (Loss) Income
Beginning balance, shareholders' equity at Dec. 31, 2019	$ 3,586,184			$ 9,624	$ 1,005	$ 0	$ 44,081	$ 3,658,197			$ (126,723)
Beginning balance, shareholders' equity (Cumulative effect of adoption of ASC 326) at Dec. 31, 2019	$ 36,943							36,943
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Cumulative effect of adoption of ASC 326
Net income	$ 353,639							353,639
Other comprehensive income (loss), net of tax	112,967										112,967
Issuance of preferred stock	339,937					339,937
Stock repurchased during period		$ (333,755)		(813)			(44,081)	(288,861)
Cash dividends		(10,869)	$ (1,206)						$ (10,869)	$ (1,206)
Preferred stock dividends declared	(9,426)							(9,426)
Ending balance, shareholders' equity at Sep. 30, 2020	4,074,414			8,811	1,005	339,937	0	3,738,417			(13,756)
Beginning balance, shareholders' equity at Jun. 30, 2020	3,991,444			8,929	1,005	339,937	0	3,651,237			(9,664)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	142,684							142,684
Other comprehensive income (loss), net of tax	(4,092)										(4,092)
Issuance of preferred stock	0					0
Stock repurchased during period		(47,060)		(118)			0	(46,942)
Cash dividends		(3,524)	(402)						(3,524)	(402)
Preferred stock dividends declared	(4,636)							(4,636)
Ending balance, shareholders' equity at Sep. 30, 2020	4,074,414			8,811	1,005	339,937	0	3,738,417			(13,756)
Beginning balance, shareholders' equity at Dec. 31, 2020	4,229,268			8,811	1,005	339,937	0	3,867,252			12,263
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	424,177							424,177
Other comprehensive income (loss), net of tax	(44,400)										(44,400)
Cash dividends		(12,426)	(1,416)						(12,426)	(1,416)
Preferred stock dividends declared	(13,908)							(13,908)
Ending balance, shareholders' equity at Sep. 30, 2021	4,581,295			8,811	1,005	339,937	0	4,263,679			(32,137)
Beginning balance, shareholders' equity at Jun. 30, 2021	4,476,490			8,811	1,005	339,937	0	4,148,857			(22,120)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	124,073							124,073
Other comprehensive income (loss), net of tax	(10,017)										(10,017)
Cash dividends		$ (4,143)	$ (472)						$ (4,143)	$ (472)
Preferred stock dividends declared	(4,636)							(4,636)
Ending balance, shareholders' equity at Sep. 30, 2021	$ 4,581,295			$ 8,811	$ 1,005	$ 339,937	$ 0	$ 4,263,679			$ (32,137)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.47	$ 0.40	$ 1.41	$ 1.20
Class A Common Stock
Stock repurchased during period (in shares)		117,700		813,090
Common Stock | Class A Common Stock
Stock repurchased during period (in shares)		117,700		813,090

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES
Net income	$ 424,177	$ 353,639
Adjustments to reconcile net income to cash provided by operating activities:
Provision (credit) for loan and lease losses	(31,697)	52,949
Deferred tax expense (benefit)	9,266	16,227
Net change in current taxes	(774,212)	(38,878)
Depreciation and amortization	80,293	81,169
Net (decrease) increase in accrued interest payable	(2,855)	(7,620)
Net decrease (increase) in income earned not collected	12,783	(28,025)
Contribution to pension plans	0	(100,000)
Realized gains on investment securities available for sale, net	(33,119)	(54,972)
Marketable equity securities gains, net	(31,015)	(10,461)
Origination of loans held for sale	(911,995)	(775,900)
Proceeds from Sale of Loans Held-for-sale	808,172	743,508
Gain on sale of loans	(26,789)	(25,728)
Net (gains) losses on other real estate owned	(2,971)	2,360
Net accretion of premiums and discounts	5,017	4,599
Amortization of intangible assets	16,408	18,589
Origination of mortgage servicing rights, net of change in valuation allowance	(9,775)	(1,332)
Net change in other assets	14,233	(6,394)
Net change in other liabilities	(7,692)	(7,472)
Net cash provided by operating activities	(461,771)	216,258
INVESTING ACTIVITIES
Net increase in loans outstanding	325,209	(3,876,578)
Purchases of investment securities available for sale	(3,620,680)	(7,608,380)
Purchases of investment securities held to maturity	(1,199,419)	(856,047)
Purchases of marketable equity securities	(1,563)	(333,126)
Proceeds from maturities/calls of investment securities held to maturity	605,664	134,736
Proceeds from maturities/calls of investment securities available for sale	1,968,339	1,909,462
Proceeds from sales of investment securities available for sale	1,366,909	3,889,386
Proceeds from sales of marketable equity securities	1,111	332,762
Net increase in overnight investments	(5,527,727)	(1,994,972)
Cash paid to FDIC for settlement of shared-loss agreement	(16,103)	(99,468)
Proceeds from sales of other real estate	29,666	19,683
Proceeds from sales of premises and equipment	1,194	46
Purchases of premises and equipment	(72,463)	(98,490)
Business acquisitions, net of cash acquired	0	(59,999)
Other investing activities	(18,940)	0
Net cash used in investing activities	(6,158,803)	(8,640,985)
FINANCING ACTIVITIES
Net decrease in time deposits	(314,004)	(759,491)
Net increase in demand and other interest-bearing deposits	6,949,598	8,556,808
Net decrease in short-term borrowings	22,088	(44,344)
Repayments of Other Long-term Debt	(29,343)	(82,747)
Origination of long-term obligations	0	745,849
Net proceeds from preferred stock issuance	0	339,937
Repurchase of common stock	0	(333,755)
Cash dividends paid	(32,363)	(21,830)
Net cash (used in) provided by financing activities	6,595,976	8,400,427
Change in cash and due from banks	(24,598)	(24,300)
Cash and due from banks at beginning of period	362,048	376,719
Cash and due from banks at end of period	337,450	352,419
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Interest	48,926	85,344
Income taxes	871,327	117,716
Transfers of loans to other real estate	7,861	10,295
Dividends declared but not paid	0	3,926
Unsettled call of investment securities	15,000	0
Loans held for sale exchanged for investment securities	177,301	0
Reclassification of portfolio loans to loans held for sale	22,655	(3,464)
Transfers of premises and equipment to other real estate	$ 8,593	$ 8,133

Accounting Policies and Basis o

Accounting Policies and Basis of Presentation	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Accounting Policies and Basis of Presentation	ACCOUNTING POLICIES AND BASIS OF PRESENTATION First Citizens BancShares, Inc. (“BancShares”) is a financial holding company organized under the laws of Delaware and conducts operations through its banking subsidiary, First-Citizens Bank & Trust Company (“FCB”), which is headquartered in Raleigh, North Carolina. General These consolidated financial statements and notes thereto are presented in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and consolidated results of operations have been made. The unaudited interim consolidated financial statements included in this Quarterly Report on Form 10-Q should be read in conjunction with the Consolidated Financial Statements and Notes to the Consolidated Financial Statements included in BancShares’ Annual Report on Form 10-K for the year ended December 31, 2020. Reclassifications In certain instances, amounts reported in prior periods’ consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders’ equity or net income. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions which affect the amounts reported. Actual results could differ from those estimates. The estimates BancShares considers significant are the allowance for credit losses (“ACL”), fair value measurements, and income taxes. Share Repurchases BancShares did not repurchase shares of Class A common stock during the nine-month period ended September 30, 2021 . During the third quarter of 2020, BancShares repurchased a total of 117,700 shares of Class A common stock for $47.1 million at an average cost per share of $399.82. During the nine months ended September 30, 2020, BancShares repurchased a total of 813,090 shares of Class A common stock for $333.8 million at an average cost per share of $410.48. During 2020, share repurchases included 45,000 shares of Class A common stock purchased from Ella Ann Holding, as trustee of her revocable trust. Mrs. Holding is the widow of BancShares’ former Executive Vice Chairman, Frank B. Holding, and the mother of Frank B. Holding, Jr. and Hope H. Bryant, BancShares’ Chairman and Chief Executive Officer and Vice Chairman, respectively. Small Business Administration Paycheck Protection Program The Small Business Administration Paycheck Protection Program (“SBA-PPP”) is one of the centerpieces of the Coronavirus Aid Relief and Economic Security Act (the “CARES Act”), which was passed on March 27, 2020 in response to the outbreak of a novel strain of coronavirus (“COVID-19”) and was supplemented with subsequent legislation. Overseen by the United States (“U.S.”) Department of the Treasury, the SBA-PPP offers cash-flow assistance to nonprofit and small business employers through guaranteed loans for certain expenses. Borrowers are eligible for forgiveness of principal and accrued interest on SBA-PPP loans to the extent that the proceeds were used to cover eligible payroll costs, interest costs, rent, and utility costs over a period of between eight and 24-weeks after the loan is made as long as the borrower retains its employees and their compensation levels. The CARES Act authorized the United States Small Business Administration (“SBA”) to temporarily guarantee these loans. The SBA began processing forgiveness payments during the fourth quarter of 2020. The Consolidated Appropriations Act 2021 was signed into law during the fourth quarter of 2020 and contained provisions for a second round of funding of SBA-PPP loans and during the first nine months of 2021, BancShares originated approximately 12,000 SBA-PPP loans totaling approximately $1.2 billion. Due to the unique nature of these provisions, SBA-PPP loans have been disclosed as a separate loan class. Origination fees received from the SBA are capitalized into the carrying amount of the loans. The deferred fee income, net of origination costs, is recognized over the life of the loans as an adjustment to yield using the effective interest method. As of September 30, 2021, SBA-PPP loans outstanding were $1.1 billion. Recently Issued Accounting Pronouncements There were no Accounting Standards Updates (“ASUs”) issued during the third quarter of 2021 by the Financial Accounting Standards Board (“FASB”) that will have a material impact on BancShares’ consolidated financial statements.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Business Combinations	BUSINESS COMBINATIONS Recently Announced Business Combinations CIT Group Inc. On October 15, 2020, BancShares and CIT Group Inc., a Delaware corporation (“CIT”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) by and among BancShares, FCB, FC Merger Subsidiary IX, Inc., a direct, wholly owned subsidiary of FCB (“Merger Sub”), and CIT, the parent company of CIT Bank, N.A., a national banking association (“CIT Bank”). Pursuant to the terms and subject to the conditions set forth in the Merger Agreement, Merger Sub will merge with and into CIT, with CIT as the surviving entity (the “First-Step Merger”), and as soon as reasonably practicable following the effective time of the First-Step Merger, CIT will merge with and into FCB, with FCB as the surviving entity (together with the First-Step Merger, the “Mergers”). The Merger Agreement further provides that immediately following the consummation of the Mergers, CIT Bank will merge with and into FCB, with FCB as the surviving bank (together with the Mergers, the “Transaction”). The Merger Agreement was unanimously approved by the Board of Directors of each of BancShares and CIT. The transaction was approved by the shareholders of both companies and has received regulatory approval from the North Carolina Commissioner of Banks and the Federal Deposit Insurance Corporation (“FDIC”). On September 30, 2021, the parties entered into an amendment to the merger agreement pursuant to which the parties mutually agreed to extend until March 1, 2022 the date after which either party may elect to terminate the merger agreement if the merger has not yet been completed. Completion of the proposed merger remains subject to approval from the Board of Governors of the Federal Reserve System. Upon the terms and subject to the conditions set forth in the Merger Agreement, at the effective time of the First-Step Merger (the “Effective Time”), each share of CIT common stock, par value $0.01 per share, issued and outstanding immediately prior to the Effective Time (“CIT Common Stock”), except for certain shares of CIT Common Stock owned by CIT or BancShares, will be converted into the right to receive 0.06200 shares of BancShares Class A common stock, par value $1.00 per share. Holders of CIT Common Stock will receive cash in lieu of fractional shares. In addition, at the Effective Time, each share of Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series A, par value $0.01 per share, of CIT and 5.625% Non-Cumulative Perpetual Preferred Stock, Series B, par value $0.01 per share, of CIT issued and outstanding will automatically be converted into the right to receive one share of a newly created series of preferred stock, Series B, of BancShares and one share of a newly created series of preferred stock, Series C, of BancShares, respectively.

Investments

Investments	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Investments	INVESTMENTS The amortized cost and fair value of investment securities at September 30, 2021 and December 31, 2020, were as follows: September 30, 2021 (Dollars in thousands) Amortized cost (1) Gross Gross unrealized Fair Investment securities available for sale Government agency $ 851,860 $ 5,348 $ 3,480 $ 853,728 Residential mortgage-backed securities 4,800,194 19,219 17,767 4,801,646 Commercial mortgage-backed securities 1,092,183 9,875 11,406 1,090,652 Corporate bonds 600,906 25,295 1,098 625,103 Total investment securities available for sale $ 7,345,143 $ 59,737 $ 33,751 $ 7,371,129 Investment in marketable equity securities 85,554 37,744 151 123,147 Investment securities held to maturity Residential mortgage-backed securities 2,122,299 5,313 15,051 2,112,561 Commercial mortgage-backed securities 1,256,771 3 18,265 1,238,509 Other 2,008 — — 2,008 Total investment securities held to maturity 3,381,078 5,316 33,316 3,353,078 Total investment securities $ 10,811,775 $ 102,797 $ 67,218 $ 10,847,354 December 31, 2020 (Dollars in thousands) Amortized cost (1) Gross Gross unrealized Fair Investment securities available for sale U.S. Treasury $ 499,832 $ 101 $ — $ 499,933 Government agency 706,241 723 5,573 701,391 Residential mortgage-backed securities 4,369,130 70,283 1,310 4,438,103 Commercial mortgage-backed securities 745,892 25,645 — 771,537 Corporate bonds 590,870 14,437 2,028 603,279 Total investment securities available for sale $ 6,911,965 $ 111,189 $ 8,911 $ 7,014,243 Investment in marketable equity securities 84,837 8,654 1,811 91,680 Investment securities held to maturity Residential mortgage-backed securities 1,877,692 17,689 — 1,895,381 Commercial mortgage-backed securities 937,034 3,884 56 940,862 Other 2,256 — — 2,256 Total investment securities held to maturity 2,816,982 21,573 56 2,838,499 Total investment securities $ 9,813,784 $ 141,416 $ 10,778 $ 9,944,422 (1) Amortized cost includes any recorded ACL. On November 1, 2020, mortgage-backed securities with an amortized cost of $1.46 billion were transferred from investment securities available for sale to the held to maturity portfolio. At the time of transfer, the mortgage-backed securities had a fair value of $1.47 billion and a weighted average contractual maturity of 18 years. The unrealized gain on these securities at the date of transfer was $5.9 million, or $4.5 million net of tax, and was reported as a component of accumulated other comprehensive income. This unrealized gain is accreted over the remaining expected life of the securities as an adjustment of yield. Investments in residential and commercial mortgage-backed securities represent securities issued by the Government National Mortgage Association, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. Investments in government agency securities represent securities issued by the SBA. Investments in corporate bonds and marketable equity securities represent positions in securities of other financial institutions. Other held to maturity investments include certificates of deposit with other financial institutions. BancShares also holds approximately 354,000 shares of Class B common stock of Visa, Inc. (“Visa”). Until the resolution of certain litigation, at which time the Visa Class B common stock will convert to publicly traded Visa Class A common stock, these shares are only transferable to other shareholders of Visa Class B common stock. As a result, there is limited transfer activity in private transactions between buyers and sellers. Given this limited trading activity and the continuing uncertainty regarding the likelihood, ultimate timing and eventual exchange rate for shares of Visa Class B common stock into shares of Visa Class A common stock, these shares are not considered to have a readily determinable fair value and are recorded at $0. BancShares continues to monitor the trading activity in Visa Class B common stock and the status of the resolution of certain litigation matters at Visa that would trigger the conversion of the Visa Class B common stock into Visa Class A common stock. BancShares held Federal Housing Loan Bank (“ FHLB”) stock of $40.5 million and $45.4 million and other non-marketable equity securities of $9.6 million and $11.6 million at September 30, 2021 and December 31, 2020, respectively. These securities are recorded at cost within other assets. As of September 30, 2021 and December 31, 2020, no ACL was required for available for sale and held to maturity debt securities. Accrued interest receivables for available for sale and held to maturity debt securities were excluded from the estimate for credit losses. At September 30, 2021, accrued interest receivables for available for sale and held to maturity debt securities were $21.1 million and $6.0 million, respectively. At December 31, 2020, accrued interest receivables for available for sale and held to maturity debt securities were $17.6 million and $5.4 million, respectively. During the three and nine months ended September 30, 2021 and 2020, no accrued interest was deemed uncollectible and written off against interest income. The following table provides the amortized cost and fair value by contractual maturity for investment securities available for sale and held to maturity. Expected maturities will differ from contractual maturities on certain securities because issuers and borrowers of underlying collateral may have the right to call or prepay obligations with or without prepayment penalties. Residential and commercial mortgage-backed and government agency securities are stated separately as they are not due at a single maturity date. September 30, 2021 December 31, 2020 (Dollars in thousands) Amortized cost (1) Fair Amortized cost (1) Fair Investment securities available for sale Non-amortizing securities maturing in: One year or less $ 1,204 $ 1,208 $ 500,846 $ 500,954 One through five years 37,248 38,540 72,565 73,881 Five through 10 years 545,754 568,692 508,320 519,570 Over 10 years 16,700 16,663 8,971 8,807 Government agency 851,860 853,728 706,241 701,391 Residential mortgage-backed securities 4,800,194 4,801,646 4,369,130 4,438,103 Commercial mortgage-backed securities 1,092,183 1,090,652 745,892 771,537 Total investment securities available for sale $ 7,345,143 $ 7,371,129 $ 6,911,965 $ 7,014,243 Investment securities held to maturity Non-amortizing securities maturing in: One year or less 1,259 1,259 1,507 1,507 One through five years 749 749 749 749 Residential mortgage-backed securities 2,122,299 2,112,561 1,877,692 1,895,381 Commercial mortgage-backed securities 1,256,771 1,238,509 937,034 940,862 Total investment securities held to maturity $ 3,381,078 $ 3,353,078 $ 2,816,982 $ 2,838,499 (1) Amortized cost includes any recorded ACL. The following table provides the gross realized gains and losses on the sales of investment securities available for sale for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Gross realized gains on sales of investment securities available for sale $ 8,082 $ 21,425 $ 33,133 $ 55,651 Gross realized losses on sales of investment securities available for sale — — (14) (679) Net realized gains on sales of investment securities available for sale $ 8,082 $ 21,425 $ 33,119 $ 54,972 The following table provides the realized and unrealized gains and losses on marketable equity securities for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Marketable equity securities gains (losses), net $ 3,350 $ (2,701) $ 31,015 $ 10,461 Less net gains recognized on marketable equity securities sold — 2,568 263 39,884 Unrealized gains (losses) recognized on marketable equity securities held $ 3,350 $ (5,269) $ 30,752 $ (29,423) The following table provides information regarding securities with unrealized losses as of September 30, 2021 and December 31, 2020: September 30, 2021 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Investment securities available for sale Government agency $ 302,114 $ 2,857 $ 119,231 $ 623 $ 421,345 $ 3,480 Residential mortgage-backed securities 2,137,675 17,752 1,762 $ 15 2,139,437 17,767 Commercial mortgage-backed securities 758,798 11,406 — $ — 758,798 11,406 Corporate bonds 42,593 1,042 10,444 $ 56 53,037 1,098 Total $ 3,241,180 $ 33,057 $ 131,437 $ 694 $ 3,372,617 $ 33,751 December 31, 2020 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Investment securities available for sale Government agency $ 268,622 $ 3,197 $ 328,777 $ 2,376 $ 597,399 $ 5,573 Residential mortgage-backed securities 433,816 1,241 23,064 69 456,880 1,310 Corporate bonds 57,715 2,028 — — 57,715 2,028 Total $ 760,153 $ 6,466 $ 351,841 $ 2,445 $ 1,111,994 $ 8,911 As of September 30, 2021, there were 36 investment securities available for sale with continuous losses for more than 12 months, of which 34 were government sponsored enterprise-issued mortgage-backed securities or government agency securities and two were corporate bonds. None of the unrealized losses identified as of September 30, 2021, or December 31, 2020, relate to the issuer’s ability to honor redemption obligations. Rather, the unrealized losses relate to changes in interest rates relative to when the investment securities were purchased, and do not indicate credit-related impairment. BancShares considered other factors including changes in credit ratings, delinquencies, and other macroeconomic factors in this determination. As a result, none of the securities were deemed to require an allowance for credit losses. BancShares has the ability and intent to retain these securities for a period of time sufficient to recover all unrealized losses. Investment securities having an aggregate carrying value of $5.5 billion at September 30, 2021, and $4.6 billion at December 31, 2020, were pledged as collateral to secure public funds on deposit and certain short-term borrowings, and for other purposes as required by law. BancShares’ portfolio of held to maturity debt securities consists of mortgage-backed securities issued by government agencies and government sponsored entities. Given the consistently strong credit rating of the U.S. Treasury and the long history of no credit losses on debt securities issued by government agencies and government sponsored entities, no further credit monitoring is performed on these portfolios. Should there be downgrades to the credit rating of the U.S. Treasury or losses reported on securities issued by government agencies and government sponsored entities, BancShares will reevaluate its determination of zero expected credit losses on held to maturity debt securities. There were no debt securities held to maturity on nonaccrual status as of September 30, 2021. A security is considered past due once it is 30 days contractually past due under the terms of the agreement. There were no securities past due as of September 30, 2021.

Loans and Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
Loans and Leases	LOANS AND LEASES BancShares’ accounting methods for loans and leases depends on whether they are originated or purchased, and if purchased, whether or not the loans reflect more than insignificant credit deterioration since origination, which is determined as of the acquisition date. Non-purchased credit deteriorated (“PCD”) loans consist of loans originated by BancShares and loans purchased from other institutions, that do not reflect more than insignificant credit deterioration at acquisition. Purchased loans which reflect more than insignificant credit deterioration are classified as PCD and reported as a single loan segment or class. At the date of acquisition, all acquired loans are recorded at fair value. Loans and leases outstanding included the following at September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 Commercial: Construction and land development $ 1,247,680 $ 985,424 Owner occupied commercial mortgage 11,625,554 11,165,012 Non-owner occupied commercial mortgage 3,002,928 2,987,689 Commercial and industrial and leases 5,266,266 5,013,644 SBA-PPP 1,086,917 2,406,291 Total commercial loans 22,229,345 22,558,060 Consumer: Residential mortgage 5,701,346 5,561,686 Revolving mortgage 1,834,690 2,052,854 Construction and land development 391,768 348,123 Consumer auto 1,350,377 1,255,402 Consumer other 635,408 552,968 Total consumer loans 9,913,589 9,771,033 PCD loans 373,255 462,882 Total loans and leases $ 32,516,189 $ 32,791,975 At September 30, 2021 and December 31, 2020, accrued interest receivable on loans was $88.1 million and $107.7 million, respectively, and was excluded from the estimate of credit losses. Certain residential real estate loans are originated to be sold to investors. BancShares has elected the fair value option on these loans, which are recorded in loans held for sale. In addition, BancShares may change its strategy for certain portfolio loans and decide to sell them in the secondary market. At that time, portfolio loans are transferred to loans held for sale at the lower of cost or market value. Loans held for sale totaled $98.5 million and $124.8 million at September 30, 2021 and December 31, 2020, respectively. The following table presents selected components of the amortized cost of loans. (Dollars in thousands) September 30, 2021 December 31, 2020 Deferred fees, including unearned fees and unamortized costs on non-PCD loans Net deferred fees related to SBA-PPP loans $ 39,372 $ 41,064 Net deferred fees related to other portfolios 15,162 9,153 Total net deferred fees $ 54,534 $ 50,217 Net unamortized discount on purchased loans Non-PCD $ 13,350 $ 19,473 PCD 32,623 45,254 Total $ 45,973 $ 64,727 The aging of the outstanding loans and leases, by class, at September 30, 2021 and December 31, 2020 is provided in the tables below. Loans and leases past due less than 30 days are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement. September 30, 2021 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 233 $ — $ 1,424 $ 1,657 $ 1,246,023 $ 1,247,680 Owner occupied commercial mortgage 7,210 5,553 8,198 20,961 11,604,593 11,625,554 Non-owner occupied commercial mortgage 752 1,245 6,716 8,713 2,994,215 3,002,928 Commercial and industrial and leases 10,309 3,234 9,690 23,233 5,243,033 5,266,266 SBA-PPP — — — — 1,086,917 1,086,917 Total commercial loans 18,504 10,032 26,028 54,564 22,174,781 22,229,345 Consumer: Residential mortgage 18,417 6,607 20,864 45,888 5,655,458 5,701,346 Revolving mortgage 5,587 1,443 4,513 11,543 1,823,147 1,834,690 Construction and land development 477 1,719 70 2,266 389,502 391,768 Consumer auto 5,345 1,173 1,263 7,781 1,342,596 1,350,377 Consumer other 2,197 1,122 1,295 4,614 630,794 635,408 Total consumer loans 32,023 12,064 28,005 72,092 9,841,497 9,913,589 PCD loans 11,407 5,200 27,111 43,718 329,537 373,255 Total loans and leases $ 61,934 $ 27,296 $ 81,144 $ 170,374 $ 32,345,815 $ 32,516,189 December 31, 2020 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 956 $ 527 $ 1,603 $ 3,086 $ 982,338 $ 985,424 Owner occupied commercial mortgage 8,757 2,232 14,082 25,071 11,139,941 11,165,012 Non-owner occupied commercial mortgage 12,370 — 5,973 18,343 2,969,346 2,987,689 Commercial and industrial and leases 14,532 2,842 3,243 20,617 4,993,027 5,013,644 SBA-PPP — — — — 2,406,291 2,406,291 Total commercial loans 36,615 5,601 24,901 67,117 22,490,943 22,558,060 Consumer: Residential mortgage 43,218 8,364 31,690 83,272 5,478,414 5,561,686 Revolving mortgage 11,977 2,626 7,415 22,018 2,030,836 2,052,854 Construction and land development 932 77 330 1,339 346,784 348,123 Consumer auto 6,825 1,835 1,076 9,736 1,245,666 1,255,402 Consumer other 3,610 1,464 1,505 6,579 546,389 552,968 Total consumer loans 66,562 14,366 42,016 122,944 9,648,089 9,771,033 PCD loans 18,322 6,076 31,026 55,424 407,458 462,882 Total loans and leases $ 121,499 $ 26,043 $ 97,943 $ 245,485 $ 32,546,490 $ 32,791,975 The amortized cost, by class, of loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at September 30, 2021 and December 31, 2020, were as follows: September 30, 2021 December 31, 2020 (Dollars in thousands) Nonaccrual Loans and Nonaccrual Loans and Commercial: Construction and land development $ 1,457 $ — $ 1,661 $ — Owner occupied commercial mortgage 19,886 601 23,103 3,625 Non-owner occupied commercial mortgage 10,613 — 7,932 147 Commercial and industrial and leases 20,689 1,414 10,626 540 Total commercial loans 52,645 2,015 43,322 4,312 Consumer: Residential mortgage 44,463 779 66,345 — Revolving mortgage 17,295 — 22,236 — Construction and land development 571 — 652 — Consumer auto 3,287 — 3,166 — Consumer other 476 1,033 823 1,195 Total consumer loans 66,092 1,812 93,222 1,195 PCD loans 45,038 1,787 54,939 355 Total loans and leases $ 163,775 $ 5,614 $ 191,483 $ 5,862 Credit Quality Loans and leases are monitored for credit quality on a recurring basis. Commercial and consumer loans and leases have different credit quality indicators as a result of the unique characteristics of the loan segments being evaluated. The credit quality indicators for commercial loans and leases are borrower risk classifications developed through a review of individual borrowers on an ongoing basis. Commercial loans are evaluated at least annually, with more frequent evaluations done on criticized loans. Commercial loans are also updated if there is evidence of potential credit deterioration, such as delinquency. Commercial credit cards are included in the Commercial and industrial and leases segment, but are evaluated based primarily upon delinquency status. The risk classifications as of the date presented are based on the most recent assessment performed and are defined below: Pass – A pass rated asset is not adversely classified because it does not display any of the characteristics for adverse classification. Special mention – A special mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, such potential weaknesses may result in deterioration of the repayment prospects or collateral position at some future date. Special mention assets are not adversely classified and do not warrant adverse classification. Substandard – A substandard asset is inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged, if any. Assets classified as substandard generally have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt. These assets are characterized by the distinct possibility of loss if the deficiencies are not corrected. Doubtful – An asset classified as doubtful has all the weaknesses inherent in an asset classified substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently existing facts, conditions and values. Loss – Assets classified as loss are considered uncollectible and of such little value that it is inappropriate to be carried as an asset. This classification is not necessarily equivalent to any potential for recovery or salvage value, but rather that it is not appropriate to defer a full charge-off even though partial recovery may be affected in the future. Ungraded – Ungraded loans represent loans that are not included in the individual credit grading process due to their relatively small balances or borrower type. The majority of ungraded loans at September 30, 2021 relate to business credit cards. Business credit card loans are subject to automatic charge-off when they become 120 days past due in the same manner as unsecured consumer lines of credit. The remaining balance is comprised of a small amount of commercial mortgage, lease financing and other commercial real estate loans. The credit quality indicators for consumer and PCD loans are based on delinquency status of the borrower as of the date presented. As the borrower becomes more delinquent, the likelihood of loss increases. The following tables represent current credit quality indicators by origination year as of September 30, 2021. September 30, 2021 Commercial Loans Amortized Cost Basis by Origination Year Classification: 2021 2020 2019 2018 2017 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Construction and land development Pass $ 373,012 $ 451,926 $ 256,321 $ 98,892 $ 44,343 $ 12,396 $ 4,231 $ — $ 1,241,121 Special Mention 19 157 — 134 63 — — — 373 Substandard 300 38 326 1,442 4,070 10 — — 6,186 Total 373,331 452,121 256,647 100,468 48,476 12,406 4,231 — 1,247,680 Owner occupied commercial mortgage Pass 2,069,209 3,078,093 1,989,052 1,316,012 1,036,593 1,778,334 122,411 120 11,389,824 Special Mention 2,082 24,356 29,358 28,165 12,199 20,469 4,047 71 120,747 Substandard 9,459 7,495 22,482 10,947 18,598 39,695 6,307 — 114,983 Total 2,080,750 3,109,944 2,040,892 1,355,124 1,067,390 1,838,498 132,765 191 11,625,554 Non-owner occupied commercial mortgage Pass 438,949 770,507 587,335 278,507 283,867 507,411 31,876 — 2,898,452 Special Mention 495 487 263 10,219 800 5,654 500 — 18,418 Substandard 2,615 11,742 22,600 10,184 10,243 27,352 1,322 — 86,058 Total 442,059 782,736 610,198 298,910 294,910 540,417 33,698 — 3,002,928 Commercial and industrial and leases Pass 1,238,557 1,162,246 714,374 344,220 193,857 350,870 1,087,462 5,136 5,096,722 Special Mention 2,323 8,279 22,100 3,528 4,070 4,324 4,575 206 49,405 Substandard 7,765 7,978 4,770 4,241 3,175 4,221 17,392 1,280 50,822 Doubtful — — — — — 1 1 — 2 Ungraded — — — — — — 69,315 — 69,315 Total 1,248,645 1,178,503 741,244 351,989 201,102 359,416 1,178,745 6,622 5,266,266 SBA-PPP Pass 1,011,370 75,547 — — — — — — 1,086,917 Total commercial $ 5,156,155 $ 5,598,851 $ 3,648,981 $ 2,106,491 $ 1,611,878 $ 2,750,737 $ 1,349,439 $ 6,813 $ 22,229,345 Consumer and PCD Loans Amortized Cost Basis by Origination Year Days Past Due: 2021 2020 2019 2018 2017 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Residential mortgage Current $ 1,591,381 $ 1,651,853 $ 690,779 $ 410,446 $ 390,940 $ 900,129 $ 19,930 $ — $ 5,655,458 30-59 days 252 1,506 4,728 3,066 1,486 7,379 — — 18,417 60-89 days 788 295 — 764 881 3,879 — — 6,607 90 days or greater 55 713 1,059 1,511 3,084 14,193 249 — 20,864 Total 1,592,476 1,654,367 696,566 415,787 396,391 925,580 20,179 — 5,701,346 Revolving mortgage Current — — — — — — 1,700,947 122,200 1,823,147 30-59 days — — — — — — 2,939 2,648 5,587 60-89 days — — — — — — 378 1,065 1,443 90 days or greater — — — — — — 1,901 2,612 4,513 Total — — — — — — 1,706,165 128,525 1,834,690 Construction and land development Current 165,993 175,007 26,889 10,258 5,745 3,016 2,594 — 389,502 30-59 days 33 416 — — — 28 — — 477 60-89 days — 1,650 — — 69 — — — 1,719 90 days or greater — 29 — — — 41 — — 70 Total 166,026 177,102 26,889 10,258 5,814 3,085 2,594 — 391,768 Consumer auto Current 504,537 384,849 229,033 139,764 59,487 24,926 — — 1,342,596 30-59 days 889 1,262 1,450 877 586 281 — — 5,345 60-89 days 200 330 234 255 84 70 — — 1,173 90 days or greater 140 347 420 228 83 45 — — 1,263 Total 505,766 386,788 231,137 141,124 60,240 25,322 — — 1,350,377 Consumer other Current 117,047 33,700 16,222 5,431 5,011 29,871 423,512 — 630,794 30-59 days 89 63 18 24 — 13 1,990 — 2,197 60-89 days 11 25 89 1 — — 996 — 1,122 90 days or greater 49 12 17 1 — — 1,216 — 1,295 Total 117,196 33,800 16,346 5,457 5,011 29,884 427,714 — 635,408 Total consumer $ 2,381,464 $ 2,252,057 $ 970,938 $ 572,626 $ 467,456 $ 983,871 $ 2,156,652 $ 128,525 $ 9,913,589 PCD loans Current $ — $ 23,091 $ 23,792 $ 21,034 $ 20,864 $ 213,681 $ 10,622 $ 16,453 $ 329,537 30-59 days — 846 61 785 1,393 7,777 113 432 11,407 60-89 days — 98 149 48 — 4,699 29 177 5,200 90 days or greater — 806 230 3,698 1,070 20,319 16 972 27,111 Total PCD $ — $ 24,841 $ 24,232 $ 25,565 $ 23,327 $ 246,476 $ 10,780 $ 18,034 $ 373,255 Total loans and leases $ 7,537,619 $ 7,875,749 $ 4,644,151 $ 2,704,682 $ 2,102,661 $ 3,981,084 $ 3,516,871 $ 153,372 $ 32,516,189 The following tables represent current credit quality indicators by origination year as of December 31, 2020. December 31, 2020 Commercial Loans Amortized Cost Basis by Origination Year Classification: 2020 2019 2018 2017 2016 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Construction and land development Pass $ 342,183 $ 341,233 $ 190,429 $ 50,776 $ 23,969 $ 11,306 $ 10,969 $ — $ 970,865 Special Mention 246 — 6,421 5,342 — — 153 — 12,162 Substandard 229 629 1,450 — 8 81 — — 2,397 Total 342,658 341,862 198,300 56,118 23,977 11,387 11,122 — 985,424 Owner occupied commercial mortgage Pass 3,183,467 2,201,165 1,625,141 1,301,412 1,049,858 1,454,020 101,556 133 10,916,752 Special Mention 6,274 20,702 36,739 12,387 17,699 25,693 5,115 72 124,681 Substandard 10,280 19,052 9,842 20,928 13,736 41,303 8,438 — 123,579 Total 3,200,021 2,240,919 1,671,722 1,334,727 1,081,293 1,521,016 115,109 205 11,165,012 Non-owner occupied commercial mortgage Pass 865,514 609,975 378,136 331,800 282,810 391,517 32,149 — 2,891,901 Special Mention 569 905 10,794 1,808 5,121 3,279 483 — 22,959 Substandard 2,899 18,546 12,296 8,764 14,087 15,427 810 — 72,829 Total 868,982 629,426 401,226 342,372 302,018 410,223 33,442 — 2,987,689 Commercial and industrial and leases Pass 1,620,622 983,852 504,463 310,468 234,735 286,996 899,978 5,520 4,846,634 Special Mention 3,146 17,065 7,265 5,393 3,307 4,912 9,152 189 50,429 Substandard 17,811 4,095 4,370 4,257 2,548 3,801 22,384 983 60,249 Ungraded — — — — — — 56,332 — 56,332 Total 1,641,579 1,005,012 516,098 320,118 240,590 295,709 987,846 6,692 5,013,644 SBA-PPP Pass 2,406,291 — — — — — — — 2,406,291 Total commercial $ 8,459,531 $ 4,217,219 $ 2,787,346 $ 2,053,335 $ 1,647,878 $ 2,238,335 $ 1,147,519 $ 6,897 $ 22,558,060 Consumer and PCD Loans Amortized Cost Basis by Origination Year Days Past Due: 2020 2019 2018 2017 2016 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Residential mortgage Current $ 1,882,683 $ 978,298 $ 655,798 $ 596,309 $ 461,719 $ 878,634 $ 24,973 $ — $ 5,478,414 30-59 days 2,278 4,573 11,463 3,772 8,613 12,299 220 — 43,218 60-89 days 30 100 1,246 1,449 834 4,705 — — 8,364 90 days or greater 282 4,831 3,150 4,015 5,689 13,723 — — 31,690 Total 1,885,273 987,802 671,657 605,545 476,855 909,361 25,193 — 5,561,686 Revolving mortgage Current — — — — — — 1,879,968 150,868 2,030,836 30-59 days — — — — — — 8,241 3,736 11,977 60-89 days — — — — — — 527 2,099 2,626 90 days or greater — — — — — — 2,301 5,114 7,415 Total — — — — — — 1,891,037 161,817 2,052,854 Construction and land development Current 215,112 85,707 24,860 10,269 6,093 2,218 2,525 — 346,784 30-59 days — 420 121 370 — 21 — — 932 60-89 days — — — 9 — 68 — — 77 90 days or greater — — — — — 330 — — 330 Total 215,112 86,127 24,981 10,648 6,093 2,637 2,525 — 348,123 Consumer auto Current 521,719 340,594 219,597 104,280 49,872 9,604 — — 1,245,666 30-59 days 2,175 1,873 1,257 842 544 134 — — 6,825 60-89 days 329 689 312 351 109 45 — — 1,835 90 days or greater 170 527 217 57 102 3 — — 1,076 Total 524,393 343,683 221,383 105,530 50,627 9,786 — — 1,255,402 Consumer other Current 53,842 27,117 10,911 7,159 2,980 29,336 415,044 — 546,389 30-59 days 322 114 77 18 11 7 3,061 — 3,610 60-89 days 102 20 13 18 3 23 1,285 — 1,464 90 days or greater 53 84 8 — — — 1,360 — 1,505 Total 54,319 27,335 11,009 7,195 2,994 29,366 420,750 — 552,968 Total consumer $ 2,679,097 $ 1,444,947 $ 929,030 $ 728,918 $ 536,569 $ 951,150 $ 2,339,505 $ 161,817 $ 9,771,033 PCD loans Current $ 31,475 $ 25,425 $ 27,183 $ 27,955 $ 28,995 $ 232,186 $ 13,212 $ 21,027 $ 407,458 30-59 days 999 925 801 718 1,341 12,637 156 745 18,322 60-89 days 447 81 312 695 97 4,098 9 337 6,076 90 days or greater 721 2,325 4,755 1,208 897 19,963 111 1,046 31,026 Total PCD $ 33,642 $ 28,756 $ 33,051 $ 30,576 $ 31,330 $ 268,884 $ 13,488 $ 23,155 $ 462,882 Total loans and leases $ 11,172,270 $ 5,690,922 $ 3,749,427 $ 2,812,829 $ 2,215,777 $ 3,458,369 $ 3,500,512 $ 191,869 $ 32,791,975 The following table provides information regarding loans pledged as collateral for borrowing capacity through the FHLB of Atlanta and the Federal Reserve Bank (“FRB”) as of September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 FHLB of Atlanta Lendable collateral value of pledged non-PCD loans $ 9,171,610 $ 8,637,844 Less: Advances 645,663 652,675 Available borrowing capacity $ 8,525,947 $ 7,985,169 Pledged non-PCD loans $ 12,646,208 $ 12,157,153 FRB Lendable collateral value of pledged non-PCD loans $ 3,795,878 $ 3,321,762 Less: Advances — — Available borrowing capacity $ 3,795,878 $ 3,321,762 Pledged non-PCD loans $ 4,610,291 $ 4,104,866

Allowance for Credit Losses

Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Allowance	ALLOWANCE FOR CREDIT LOSSES The ACL is calculated using a variety of factors, including, but not limited to, charge-off and recovery activity, loan growth, changes in macroeconomic factors, collateral type, estimated loan life and changes in credit quality. For the period ended September 30, 2021, the ACL change since December 31, 2020 was driven by continued strong credit performance, low net charge-offs, and improvement in macroeconomic factors. Forecasted economic conditions are developed using third party macroeconomic scenarios adjusted based on management’s expectations over a forecast period of two years. For most pools, BancShares uses a 12-month straight-line reversion period to historical averages for model inputs; however for the consumer other, consumer card and commercial card pools, immediate reversion to historical net loss rates is utilized. Significant macroeconomic factors used in estimating the expected losses include unemployment, gross domestic product, home price index and commercial real estate index. BancShares’ ACL forecast considers a range of economic scenarios from an upside scenario to a severely adverse scenario, but the September 30, 2021 ACL forecast was calculated using the consensus baseline scenario. This scenario showed improvements in the most significant economic factors compared to what was used to generate the December 31, 2020 ACL. These loss estimates were also influenced by BancShares’ strong credit quality and low net charge-offs. Activity in the ACL by portfolio segment is summarized as follows: Three months ended September 30, 2021 (Dollars in thousands) Commercial Consumer PCD Total Allowance for credit losses: Balance at July 1 $ 76,082 $ 94,272 $ 18,740 $ 189,094 Provision (credit) 975 (223) (1,872) (1,120) Charge-offs (5,967) (4,307) (799) (11,073) Recoveries 1,594 2,330 2,369 6,293 Balance at September 30 $ 72,684 $ 92,072 $ 18,438 $ 183,194 Three months ended September 30, 2020 (Dollars in thousands) Commercial Consumer PCD Total Balance at July 1 $ 76,177 $ 119,345 $ 26,928 $ 222,450 Provision (credit) 4,793 1,874 (2,625) 4,042 Charge-offs (3,328) (5,109) (495) (8,932) Recoveries 2,338 2,719 1,319 6,376 Balance at September 30 $ 79,980 $ 118,829 $ 25,127 $ 223,936 Nine months ended September 30, 2021 (Dollars in thousands) Commercial Consumer PCD Total Balance at January 1 $ 80,842 $ 119,485 $ 23,987 $ 224,314 Provision (credit) 332 (23,208) (8,821) (31,697) Charge-offs (12,342) (12,804) (2,018) (27,164) Recoveries 3,852 8,599 5,290 17,741 Balance at September 30 $ 72,684 $ 92,072 $ 18,438 $ 183,194 Nine months ended September 30, 2020 (Dollars in thousands) Commercial Consumer PCD Total Balance at December 31 $ 142,369 $ 75,236 $ 7,536 $ 225,141 Adoption of ASC 326 (87,554) 30,629 19,001 (37,924) Balance at January 1 54,815 105,865 26,537 187,217 Provision (credit) 32,854 25,066 (4,971) 52,949 Initial allowance on PCD loans — — 1,193 1,193 Charge-offs (12,712) (19,535) (3,010) (35,257) Recoveries 5,023 7,433 5,378 17,834 Balance at September 30 $ 79,980 $ 118,829 $ 25,127 $ 223,936 BancShares records an allowance for credit losses on unfunded commitments within other liabilities. Activity in the allowance for credit losses for unfunded commitments is summarized as follows: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Allowance for credit losses: Beginning balance $ 11,103 $ 13,685 $ 12,814 $ 1,055 Adoption of ASC 326 — — — 8,885 Adjusted beginning balance $ 11,103 $ 13,685 $ 12,814 $ 9,940 Provision (credit) 369 286 (1,342) 4,031 Ending balance 11,472 13,971 11,472 13,971 BancShares individually reviews loans greater than $500 thousand that are determined to be collateral-dependent. These collateral-dependent loans are evaluated based on the fair value of the underlying collateral as repayment of the loan is expected to be made through the operation or sale of the collateral. Commercial and industrial loans and leases are collateralized by business assets, while the remaining loan classes are collateralized by real property. The following table presents information on collateral-dependent loans by class and includes the amortized cost of collateral-dependent loans and leases, the net realizable value of the collateral, the extent to which collateral secures collateral-dependent loans and the associated ACL as of September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 (Dollars in thousands) Collateral-Dependent Loans Net Realizable Value of Collateral Collateral Coverage Allowance for Credit Losses Commercial: Construction and land development $ 1,424 $ 1,964 137.9 % $ — Owner occupied commercial mortgage 7,411 8,367 112.9 — Non-owner occupied commercial mortgage 8,204 11,307 137.8 1,203 Commercial and industrial and leases 4,787 6,530 136.4 230 Total commercial loans 21,826 28,168 129.1 1,433 Consumer: Residential mortgage 11,423 14,625 128.0 — Revolving mortgage — — — — Total consumer loans 11,423 14,625 128.0 — PCD loans 18,154 32,788 180.6 — Total collateral-dependent loans $ 51,403 $ 75,581 147.0 % $ 1,433 December 31, 2020 (Dollars in thousands) Collateral-Dependent Loans Net Realizable Value of Collateral Collateral Coverage Allowance for Credit Losses Commercial: Construction and land development $ 1,424 $ 1,795 126.1 % $ — Owner occupied commercial mortgage 9,792 14,253 145.6 — Non-owner occupied commercial mortgage 5,556 7,577 136.4 — Total commercial loans 16,772 23,625 140.9 — Consumer: Residential mortgage 23,011 29,775 129.4 131 PCD loans 19,042 27,872 146.4 — Total collateral-dependent loans $ 58,825 $ 81,272 138.2 % $ 131 Collateral-dependent nonaccrual loans with no recorded allowance totaled $45.5 million and $57.5 million as of September 30, 2021 and December 31, 2020, respectively. All other nonaccrual loans have a recorded allowance. Troubled Debt Restructurings BancShares accounts for certain loan modifications or restructurings as troubled debt restructurings (“TDRs”). In general, the modification or restructuring of a loan is considered a TDR if, for economic or legal reasons related to a borrower’s financial difficulties, a concession is granted to the borrower that creditors would not otherwise consider. Concessions may relate to the contractual interest rate, maturity date, payment structure or other actions. Within BancShares’ ACL loss models, TDRs are not individually evaluated unless determined to be collateral-dependent. Consumer TDRs are included in the definition of default which provides for a 100% probability of default applied within the models. As a result, subsequent changes in credit quality metrics do not impact the calculation of the ACL on consumer TDRs. For commercial TDRs, the TDR distinction does impact the calculation of ACL, as the standard definition of default is utilized. The Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus was published by banking regulators in April 2020 to clarify expectations around loan modifications and the determination of TDRs for borrowers experiencing financial difficulty due to COVID-19. BancShares applied this regulatory guidance during its TDR identification process for short-term loan forbearance agreements as a result of COVID-19 and in most cases did not record these as TDRs. The following tables provides a summary of total TDRs by accrual status: September 30, 2021 December 31, 2020 (Dollars in thousands) Accruing Nonaccruing Total Accruing Nonaccruing Total Commercial: Construction and land development $ 346 $ 33 $ 379 $ 578 $ 54 $ 632 Owner occupied commercial mortgage 46,255 10,661 56,916 37,574 10,889 48,463 Non-owner occupied commercial mortgage 20,022 3,763 23,785 18,336 1,649 19,985 Commercial and industrial and leases 12,506 11,295 23,801 29,131 3,528 32,659 Total commercial loans 79,129 25,752 104,881 85,619 16,120 101,739 Consumer: Residential mortgage 22,106 14,937 37,043 29,458 19,380 48,838 Revolving mortgage 16,533 6,925 23,458 20,124 7,128 27,252 Construction and land development 2,380 282 2,662 1,573 9 1,582 Consumer auto 1,888 636 2,524 2,018 696 2,714 Consumer other 774 61 835 955 137 1,092 Total consumer loans 43,681 22,841 66,522 54,128 27,350 81,478 PCD loans 29,207 12,365 41,572 17,617 7,346 24,963 Total loans $ 152,017 $ 60,958 $ 212,975 $ 157,364 $ 50,816 $ 208,180 The following table provides the types of modifications designated as TDRs during the three and nine months ended September 30, 2021 and 2020. Three months ended September 30, 2021 Three months ended September 30, 2020 All restructurings All restructurings (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 7 $ 9,639 6 $ 5,703 Loan term extension 41 6,371 29 2,380 Below market interest rate 47 3,126 55 15,341 Discharged from bankruptcy 21 2,783 55 1,654 Total restructurings 116 $ 21,919 145 $ 25,078 Nine months ended September 30, 2021 Nine months ended September 30, 2020 All restructurings All restructurings (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 17 $ 19,728 23 $ 24,847 Loan term extension 112 14,500 62 5,885 Below market interest rate 148 21,004 212 38,740 Discharged from bankruptcy 110 12,478 165 7,025 Total restructurings 387 $ 67,710 462 $ 76,497 For the nine months ended September 30, 2021 and 2020, the pre-modification and post-modification outstanding amortized cost of loans modified as TDRs were not materially different.

Other Real Estate Owned

Other Real Estate Owned	9 Months Ended
	Sep. 30, 2021
Other Real Estate [Abstract]
Other Real Estate Owned	NOTE F - OTHER REAL ESTATE OWNED The following table explains changes in other real estate owned (“OREO”) during the nine months ended September 30, 2021 and 2020: (Dollars in thousands) OREO Balance at December 31, 2020 $ 50,890 Additions 16,454 Sales (24,311) Write-downs/losses (2,384) Balance at September 30, 2021 $ 40,649 Balance at December 31, 2019 $ 46,591 Additions 18,428 Acquired in business combinations 9,813 Sales (18,645) Write-downs/losses (3,398) Balance at September 30, 2020 $ 52,789

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2021
Mortgage Servicing Rights [Abstract]
Mortgage Servicing Rights	MORTGAGE SERVICING RIGHTS BancShares originates certain residential mortgages loans to sell in the secondary market. BancShares’ portfolio of residential mortgage loans serviced for third parties was $3.3 billion as of September 30, 2021 and December 31, 2020. These loans are originated and sold to third parties on a non-recourse basis with servicing rights retained. The retained servicing rights are recorded as a servicing asset and are reported in other intangible assets. The associated amortization expense and any valuation allowance recognized are included as a reduction of mortgage income. Mortgage servicing rights are initially recorded at fair value and then carried at the lower of amortized cost or fair value. Contractually specified mortgage servicing fees, late fees and ancillary fees earned were $2.1 million for each of the three month periods ended September 30, 2021 and 2020, and are reported in mortgage income. For the nine months ended September 30, 2021 and 2020, mortgage servicing fees, late fees and ancillary fees earned were each $6.4 million. The following table presents changes in the servicing asset during the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Beginning balance $ 21,985 $ 18,664 $ 18,426 $ 22,963 Servicing rights originated 1,891 1,994 8,436 5,673 Amortization (2,180) (2,208) (6,505) (6,150) Valuation allowance (increase) decrease — (305) 1,339 (4,341) Ending balance $ 21,696 $ 18,145 $ 21,696 $ 18,145 The following table presents the activity in the servicing asset valuation allowance for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Beginning balance $ 3,026 $ 4,258 $ 4,365 $ 222 Valuation allowance increase (decrease) — 305 (1,339) 4,341 Ending balance $ 3,026 $ 4,563 $ 3,026 $ 4,563 Mortgage servicing rights valuations are performed using a pooling methodology where loans with similar risk characteristics are grouped together and evaluated using discounted cash flows to estimate the present value of future earnings. Key economic assumptions used to value mortgage servicing rights were as follows: September 30, 2021 December 31, 2020 Discount rate - conventional fixed loans 8.49 % 7.92 % Discount rate - all loans excluding conventional fixed loans 9.49 % 8.92 % Weighted average constant prepayment rate 17.32 % 20.62 % Weighted average cost to service a loan $ 87.58 $ 87.58 The fair value of mortgage servicing rights is sensitive to changes in assumptions and is determined by estimating the present value of the asset’s future cash flows by utilizing discount rates, prepayment rates, and other inputs. The discount rate is based on the 10-year U.S. Treasury rate plus a risk premium of 700 basis points for conventional fixed loans and 800 basis points for all other loans. The prepayment rate is derived from the Public Securities Association Standard Prepayment model. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value and may result in the recognition of a valuation allowance. The average cost to service a loan is based on the number of loans serviced and the total cost to service the loans.

Repurchase Agreements

Repurchase Agreements	9 Months Ended
	Sep. 30, 2021
Repurchase Agreements [Abstract]
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	REPURCHASE AGREEMENTS BancShares utilizes securities sold under agreements to repurchase to facilitate the needs of customers and secure wholesale funding needs. Repurchase agreements are transactions whereby BancShares offers to sell to a counterparty an undivided interest in an eligible security at an agreed upon price, and which obligates BancShares to repurchase the security at an agreed upon date, repurchase price, and interest rate. These agreements are recorded at the amount of cash received in connection with the transaction and are reflected as securities sold under customer repurchase agreements. BancShares monitors collateral levels on a continuous basis and maintains records of each transaction specifically describing the applicable security and the counterparty’s interest in that security, and segregates the security from general assets in accordance with regulations governing custodial holdings of securities. The primary risk with repurchase agreements is market risk associated with the investments securing the transactions, as additional collateral may be required based on fair value changes of the underlying investments. Securities pledged as collateral under repurchase agreements are maintained with safekeeping agents. The carrying value of investment securities pledged as collateral under repurchase agreements was $685.9 million and $689.3 million at September 30, 2021 and December 31, 2020, respectively. At September 30, 2021, BancShares held $663.6 million of securities sold under agreements to repurchase, with overnight and continuous remaining contractual maturities, including $571.6 million collateralized by government agency securities and $92.0 million collateralized by commercial mortgage-backed securities. At December 31, 2020, BancShares held securities sold under agreements to repurchase of $641.5 million, with overnight and continuous remaining contractual maturities, including $432.8 million collateralized by government agency securities and $208.7 million collateralized by commercial mortgage-backed securities.

FDIC Shared-Loss Payable

FDIC Shared-Loss Payable	9 Months Ended
	Sep. 30, 2021
FDIC Shared-Loss Receivable [Abstract]
FDIC Shared-Loss Receivable	FDIC SHARED-LOSS PAYABLE For certain FDIC-assisted transactions, the related shared-loss agreement included a provision requiring a payment owed to the FDIC at the termination of the agreement. As of September 30, 2021, these agreements have been satisfied following a $16.1 million payment made to the FDIC during the first quarter of 2021 related to the final active agreement. The following table provides changes in the FDIC shared-loss payable since December 31, 2020: (Dollars in thousands) Total Balance at December 31, 2020 $ 15,601 Accretion 502 Payment made to the FDIC to settle shared-loss agreement (16,103) Balance at September 30, 2021 $ —

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME Accumulated other comprehensive (loss) income included the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (Dollars in thousands) Accumulated Deferred Accumulated Accumulated Deferred Accumulated Unrealized gains on securities available for sale $ 25,986 $ 5,977 $ 20,009 $ 102,278 $ 23,524 $ 78,754 Unrealized gains on securities available for sale transferred to held to maturity 3,709 853 2,856 5,399 1,242 4,157 Defined benefit pension items (71,431) (16,429) (55,002) (91,751) (21,103) (70,648) Total $ (41,736) $ (9,599) $ (32,137) $ 15,926 $ 3,663 $ 12,263 The following table highlights changes in accumulated other comprehensive (loss) income by component for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30, 2021 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 34,910 $ 3,187 $ (60,217) $ (22,120) Net unrealized losses arising during period (8,677) — — (8,677) Amounts reclassified from accumulated other comprehensive loss (6,224) (331) 5,215 (1,340) Net current period other comprehensive (loss) income (14,901) (331) 5,215 (10,017) Ending balance $ 20,009 $ 2,856 $ (55,002) $ (32,137) Three months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 113,102 $ — $ (122,766) $ (9,664) Net unrealized gains arising during period 7,530 — — 7,530 Amounts reclassified from accumulated other comprehensive loss (16,497) — 4,875 (11,622) Net current period other comprehensive income (8,967) — 4,875 (4,092) Ending balance $ 104,135 $ — $ (117,891) $ (13,756) Nine months ended September 30, 2021 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 78,754 $ 4,157 $ (70,648) $ 12,263 Net unrealized losses arising during period (33,243) — — (33,243) Amounts reclassified from accumulated other comprehensive income (25,502) (1,301) 15,646 (11,157) Net current period other comprehensive (loss) income (58,745) (1,301) 15,646 (44,400) Ending balance $ 20,009 $ 2,856 $ (55,002) $ (32,137) Nine months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 5,792 $ — $ (132,515) $ (126,723) Net unrealized gains arising during period 140,671 — — 140,671 Amounts reclassified from accumulated other comprehensive loss (42,328) — 14,624 (27,704) Net current period other comprehensive income 98,343 — 14,624 112,967 Ending balance $ 104,135 $ — $ (117,891) $ (13,756) The following table presents the amounts reclassified from accumulated other comprehensive (loss) income and the line item affected in the statement where net income is presented for the three and nine months ended September 30, 2021 and 2020: (Dollars in thousands) Three months ended September 30, 2021 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 8,082 Realized gains on investment securities available for sale, net (1,858) Income taxes $ 6,224 Accretion of unrealized gains on securities available for sale transferred to held to maturity $ 430 Net interest income (99) Income taxes $ 331 Amortization of defined benefit pension actuarial losses (6,773) Other noninterest expense 1,558 Income taxes $ (5,215) Total reclassifications for the period $ 1,340 (Dollars in thousands) Three months ended September 30, 2020 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 21,425 Realized gains on investment securities available for sale, net (4,928) Income taxes $ 16,497 Amortization of defined benefit pension actuarial losses (6,332) Other noninterest expense 1,457 Income taxes $ (4,875) Total reclassifications for the period $ 11,622 (Dollars in thousands) Nine months ended September 30, 2021 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 33,119 Realized gains on investment securities available for sale, net (7,617) Income taxes $ 25,502 Amortization of unrealized losses on securities available for sale transferred to held to maturity $ 1,690 Net interest income (389) Income taxes $ 1,301 Amortization of defined benefit pension actuarial losses $ (20,320) Other noninterest expense 4,674 Income taxes $ (15,646) Total reclassifications for the period $ 11,157 (Dollars in thousands) Nine months ended September 30, 2020 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 54,972 Realized gains on investment securities available for sale, net (12,644) Income taxes $ 42,328 Amortization of defined benefit pension actuarial losses (18,994) Other noninterest expense 4,370 Income taxes $ (14,624) Total reclassifications for the period $ 27,704

Estimated Fair Values

Estimated Fair Values	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Estimated Fair Values	ESTIMATED FAIR VALUES Fair value estimates are intended to represent the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. Where there is no active market for a financial instrument, BancShares has made estimates using discounted cash flows or other valuation techniques. Inputs used in these valuation techniques are subjective in nature, involve uncertainties and require significant judgment and therefore can only be derived within a range of precision. Accordingly, the derived fair value estimates presented below are not necessarily indicative of the amounts BancShares would realize in a current market exchange. ASC 820, Fair Value Measurements and Disclosures , indicates that assets and liabilities are recorded at fair value according to a fair value hierarchy comprised of three levels. The levels are based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The level within the fair value hierarchy for an asset or liability is based on the highest level of input that is significant to the fair value measurement (with Level 1 considered highest and Level 3 considered lowest). A brief description of each level follows: • Level 1 values are based on quoted prices for identical instruments in active markets. • Level 2 values are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 values are derived from valuation techniques in which one or more significant inputs or assumptions are not observable in the market. These unobservable inputs and assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation techniques include the use of discounted cash flow models and similar techniques. BancShares’ management reviews any changes to its valuation methodologies to ensure they are appropriate and supportable, and refines valuation methodologies as more market-based data becomes available. Accuracy of the levels of the fair value hierarchy are validated and transfers between levels of the fair value hierarchy are recognized at the end of the reporting period. The methodologies used to estimate the fair value of financial assets and financial liabilities are discussed below: Investment securities available for sale and held to maturity . The fair value of U.S. Treasury, government agency and mortgage-backed securities, municipal securities, as well as a portion of corporate bonds, is generally estimated using a third party pricing service. The third party provider evaluates securities based on comparable investments with trades and market data and will utilize pricing models that use a variety of inputs, such as benchmark yields, reported trades, broker-dealer quotes, issuer spreads, benchmark securities, bids and offers as needed. These securities are generally classified as Level 2. The remaining corporate bonds held are generally measured at fair value based on indicative bids from broker-dealers which are unadjusted and are not directly observable. These securities are considered Level 3. Investment in marketable equity securities. Equity securities are measured at fair value using observable closing prices and the market activity. Equity securities are classified as Level 1 if they are traded in an active market and as Level 2 if the observable closing price is from a less than active market. Loans held for sale. Management elects the fair value option on certain residential real estate loans originated to be sold to investors. The loans are carried at fair value based on quoted market prices for similar types of loans. Accordingly, the inputs used to calculate fair value of originated residential real estate loans held for sale are classified as Level 2 inputs. Loans held for investment subsequently transferred to held for sale are carried at the lower of cost or market. Transfers occur when management intends to sell a pool of loans in the secondary market. This typically occurs when a firm commitment to purchase from a counterparty exists. The fair value of the transferred loans is based on the quoted prices and is considered a Level 1 input. Net loans and leases. Fair value is estimated based on discounted future cash flows using the current interest rates at which loans with similar terms would be made to borrowers of similar credit quality. The inputs used in the fair value measurements for loans and leases are considered Level 3 inputs. FHLB stock . The carrying amount of FHLB stock is a reasonable estimate of fair value as these securities are not readily marketable and are evaluated for impairment based on the ultimate recoverability of the par value. BancShares considers positive and negative evidence, including the profitability and asset quality of the issuer, dividend payment history and recent redemption experience, when determining the ultimate recoverability of the par value. BancShares believes its investment in FHLB stock is ultimately recoverable at par. The inputs used in the fair value measurement for the FHLB stock are considered Level 2 inputs. Mortgage and other servicing rights. Mortgage and other servicing rights are carried at the lower of amortized cost or market value and are, therefore, carried at fair value only when fair value is less than the amortized cost. The fair value of mortgage and other servicing rights is performed using a pooling methodology. Similar loans are pooled together and a model that relies on discount rates, estimates of prepayment rates and the weighted average cost to service the loans is used to determine the fair value. The inputs used in the fair value measurement for mortgage and other servicing rights are considered Level 3 inputs. Deposits. For non-time deposits, carrying value is a reasonable estimate of fair value. The fair value of time deposits is estimated by discounting future cash flows using the interest rates currently offered for deposits with similar remaining maturities. The inputs used in the fair value measurement for deposits are considered Level 2 inputs. Borrowings. For borrowings, the fair values are determined based on recent trades or sales of the actual security if available. Otherwise, fair values are estimated by discounting future cash flows using current interest rates for similar financial instruments. The inputs used in the fair value measurement for FHLB borrowings, subordinated debentures, and other borrowings are considered Level 2 inputs. Payable to the FDIC for shared-loss agreements. The fair value of the payable to the FDIC for shared-loss agreements was determined based on payments to the FDIC in accordance with the shared-loss agreements. Cash flows were discounted using current discount rates to reflect the timing of the estimated amounts due to the FDIC. The inputs used in the fair value measurement for the payable to the FDIC were considered Level 3 inputs. Off-balance-sheet commitments and contingencies. Carrying amounts are reasonable estimates of the fair values for such financial instruments. Carrying amounts include unamortized fee income and, in some cases, reserves for any credit losses from those financial instruments. These amounts are not material to BancShares’ financial position. For all other financial assets and liabilities, the carrying value is a reasonable estimate of the fair value as of September 30, 2021 and December 31, 2020. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value. Cash and due from banks is classified on the fair value hierarchy as Level 1. Overnight investments, income earned not collected, securities sold under customer repurchase agreements, and accrued interest payable are considered Level 2. The table presents the carrying values and estimated fair values for financial instruments as of September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 Carrying value Fair value Carrying value Fair value Assets Cash and due from banks $ 337,450 $ 337,450 $ 362,048 $ 362,048 Overnight investments 9,875,063 9,875,063 4,347,336 4,347,336 Investment in marketable equity securities 123,147 123,147 91,680 91,680 Investment securities available for sale 7,371,129 7,371,129 7,014,243 7,014,243 Investment securities held to maturity 3,381,078 3,353,078 2,816,982 2,838,499 Loans held for sale 98,451 98,451 124,837 124,837 Net loans and leases 32,332,995 32,349,172 32,567,661 33,298,166 Income earned not collected 132,911 132,911 145,694 145,694 Federal Home Loan Bank stock 40,450 40,450 45,392 45,392 Mortgage and other servicing rights 22,263 22,624 19,628 20,283 Liabilities Deposits with no stated maturity 47,492,194 47,492,194 40,542,596 40,542,596 Time deposits 2,573,568 2,573,131 2,889,013 2,905,577 Securities sold under customer repurchase agreements 663,575 663,575 641,487 641,487 Federal Home Loan Bank borrowings 645,663 659,625 655,175 677,579 Subordinated debt 497,427 520,871 504,518 525,610 Other borrowings 76,139 76,643 88,470 89,263 FDIC shared-loss payable — — 15,601 15,843 Accrued interest payable 6,560 6,560 9,414 9,414 For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of September 30, 2021 and December 31, 2020: September 30, 2021 Fair value measurements using: (Dollars in thousands) Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets measured at fair value Investment securities available for sale Government agency $ 853,728 $ — $ 853,728 $ — Residential mortgage-backed securities 4,801,646 — 4,801,646 — Commercial mortgage-backed securities 1,090,652 — 1,090,652 — Corporate bonds 625,103 — 316,968 308,135 Total investment securities available for sale $ 7,371,129 $ — $ 7,062,994 $ 308,135 Marketable equity securities $ 123,147 $ 52,991 $ 70,156 $ — Loans held for sale $ 98,451 $ — $ 98,451 $ — December 31, 2020 Fair value measurements using: Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets measured at fair value Investment securities available for sale U.S. Treasury $ 499,933 $ — $ 499,933 $ — Government agency 701,391 — 701,391 — Residential mortgage-backed securities 4,438,103 — 4,438,103 — Commercial mortgage-backed securities 771,537 — 771,537 — Corporate bonds 603,279 — 286,655 316,624 Total investment securities available for sale $ 7,014,243 $ — $ 6,697,619 $ 316,624 Marketable equity securities $ 91,680 $ 32,855 $ 58,825 $ — Loans held for sale $ 124,837 $ — $ 124,837 $ — The following tables summarize activity for Level 3 assets carried at fair value on a recurring basis: Corporate bonds Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Beginning balance $ 325,448 $ 169,977 $ 316,624 $ 69,685 Purchases 23,878 78,000 30,878 178,595 Unrealized net losses (gains) included in other comprehensive income 436 2,818 3,927 901 Amounts included in net income 2,504 (81) 2,687 (249) Transfers in — — — 1,782 Sales / Calls (44,131) — (45,981) — Ending balance $ 308,135 $ 250,714 $ 308,135 $ 250,714 During the three months ended September 30, 2021 and 2020, there were no transfers between levels. During the nine months ended September 30, 2021 there were no transfers from Level 2 to Level 3, compared to $1.8 million for the same period of 2020. The transfers were due to a lack of observable inputs and trade activity for those securities. The following table presents quantitative information about Level 3 fair value measurements for fair value on a recurring basis at September 30, 2021: (Dollars in thousands) September 30, 2021 Level 3 assets Valuation technique Significant unobservable input Fair Value Corporate bonds Indicative bid provided by broker Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the issuer $ 308,135 Fair Value Option BancShares has elected the fair value option for residential real estate loans originated to be sold. This election reduces certain timing differences in the Consolidated Statement of Income and better aligns with the management of the portfolio from a business perspective. The changes in fair value were recorded as a component of mortgage income and included losses of $0.6 million and gains of $0.6 million for the three months ended September 30, 2021 and 2020, respectively. The changes in fair value included a loss of $2.9 million and a gain of $4.2 million for nine months ended September 30, 2021 and 2020, respectively. Interest earned on loans held for sale is recorded within interest income on loans and leases in the consolidated statements of income. The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential real estate originated for sale measured at fair value as of September 30, 2021 and December 31, 2020: September 30, 2021 (Dollars in thousands) Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 98,451 $ 95,396 $ 3,055 December 31, 2020 Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 124,837 $ 118,902 $ 5,935 No originated loans held for sale were 90 or more days past due or on nonaccrual status as of September 30, 2021 or December 31, 2020. BancShares may be required to measure certain financial assets at fair value on a nonrecurring basis. These adjustments to fair value usually result from the application of lower of amortized cost or fair value accounting or write-downs of individual assets due to impairment. The population of loans measured at fair value on a non-recurring basis is limited to collateral-dependent loans evaluated individually. These collateral-dependent loans are deemed to be at fair value if there is an associated ACL or if a charge-off has been recorded in the previous 12 months. A large majority of collateral for these loans is real property. Collateral values are determined using appraisals or other third-party value estimates of the subject property discounted based on estimated selling costs, generally between 5% and 10%, and immaterial adjustments for other external factors that may impact the marketability of the collateral. The weighted average discount for estimated selling costs applied to real estate collateral was 8%. OREO acquired or written down within the previous 12 months is deemed to be at fair value. Asset valuations are determined by using appraisals or other third-party value estimates of the subject property with discounts generally between 6% and 15% applied for estimated selling costs and other external factors that may impact the marketability of the property. At September 30, 2021, the weighted average discount applied was 8%. Changes to the value of the assets between scheduled valuation dates are monitored through continued communication with brokers and monthly reviews by the asset manager assigned to each asset. If there are any significant changes in the market or the subject property, valuations are adjusted or new appraisals ordered to ensure the reported values reflect the most current information. For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of September 30, 2021 and December 31, 2020: September 30, 2021 Fair value measurements using: (Dollars in thousands) Fair value Level 1 inputs Level 2 inputs Level 3 inputs Collateral-dependent loans $ 12,185 $ — $ — $ 12,185 Other real estate owned 32,391 — — 32,391 Mortgage servicing rights 20,210 — — 20,210 December 31, 2020 Fair value measurements using: Fair value Level 1 inputs Level 2 inputs Level 3 inputs Collateral-dependent loans $ 11,779 $ — $ — $ 11,779 Other real estate owned 40,115 — — 40,115 Mortgage servicing rights 16,966 — — 16,966 No financial liabilities were carried at fair value on a nonrecurring basis as of September 30, 2021 and December 31, 2020.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2021
Retirement Benefits, Description [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS BancShares sponsors noncontributory defined benefit pension plans for its qualifying employees. The service cost component of net periodic benefit cost is included in salaries and wages while all other non-service cost components are included in other noninterest expense. For the three and nine months ended September 30, 2021 and 2020, the components of net periodic benefit cost are as follows: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Service cost $ 3,838 $ 3,570 $ 11,514 $ 10,709 Interest cost 7,466 8,549 22,398 25,648 Expected return on assets (19,607) (16,423) (58,823) (49,267) Amortization of net actuarial loss 6,773 6,332 20,320 18,994 Net periodic (benefit) cost $ (1,530) $ 2,028 $ (4,591) $ 6,084

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	LEASES The following table presents right-of-use lease assets and liabilities as of September 30, 2021 and December 31, 2020: (Dollars in thousands) Classification September 30, 2021 December 31, 2020 Assets: Operating Other assets $ 62,214 $ 68,048 Finance Premises and equipment 4,852 6,478 Total leased assets $ 67,066 $ 74,526 Liabilities: Operating Other liabilities $ 63,025 $ 68,343 Finance Other borrowings 4,720 6,308 Total lease liabilities $ 67,745 $ 74,651
Leases	LEASES The following table presents right-of-use lease assets and liabilities as of September 30, 2021 and December 31, 2020: (Dollars in thousands) Classification September 30, 2021 December 31, 2020 Assets: Operating Other assets $ 62,214 $ 68,048 Finance Premises and equipment 4,852 6,478 Total leased assets $ 67,066 $ 74,526 Liabilities: Operating Other liabilities $ 63,025 $ 68,343 Finance Other borrowings 4,720 6,308 Total lease liabilities $ 67,745 $ 74,651

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments involve elements of credit, interest rate or liquidity risk and include commitments to extend credit and standby letters of credit. Commitments to extend credit are legally binding agreements to lend to customers. These commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of these commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires collateral be pledged to secure the commitment, including cash deposits, securities and other assets. Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those commitments are primarily issued to support public and private borrowing arrangements. To mitigate its risk, BancShares’ credit policies govern the issuance of standby letters of credit. The credit risk related to the issuance of these letters of credit is essentially the same as in extending loans to clients and, therefore, these letters of credit are collateralized when necessary. The following table presents the commitments to extend credit and standby letters of credit as of September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 Unused commitments to extend credit $ 12,775,929 $ 12,098,417 Standby letters of credit 116,302 129,819 BancShares has investments in qualified affordable housing projects primarily for the purposes of fulfilling Community Reinvestment Act requirements and obtaining tax credits. Affordable housing project investments were $162.3 million and $163.9 million as of September 30, 2021 and December 31, 2020, respectively, and were recorded in other assets. Unfunded commitments to fund future investments in affordable housing projects totaled $49.8 million and $53.7 million as of September 30, 2021 and December 31, 2020, respectively, and were recorded in other liabilities. BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts were claimed. BancShares has also been exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various merger transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements.

Accounting Policies and Basis_2

Accounting Policies and Basis of Presentation Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Reclassifications	Reclassifications In certain instances, amounts reported in prior periods’ consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders’ equity or net income.
Use of Estimates	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions which affect the amounts reported. Actual results could differ from those estimates. The estimates BancShares considers significant are the allowance for credit losses (“ACL”), fair value measurements, and income taxes.
New Accounting Pronouncements	Recently Issued Accounting Pronouncements There were no Accounting Standards Updates (“ASUs”) issued during the third quarter of 2021 by the Financial Accounting Standards Board (“FASB”) that will have a material impact on BancShares’ consolidated financial statements.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Aggregate Values And Unrealized Gains And Losses Of Investment Securities	The amortized cost and fair value of investment securities at September 30, 2021 and December 31, 2020, were as follows: September 30, 2021 (Dollars in thousands) Amortized cost (1) Gross Gross unrealized Fair Investment securities available for sale Government agency $ 851,860 $ 5,348 $ 3,480 $ 853,728 Residential mortgage-backed securities 4,800,194 19,219 17,767 4,801,646 Commercial mortgage-backed securities 1,092,183 9,875 11,406 1,090,652 Corporate bonds 600,906 25,295 1,098 625,103 Total investment securities available for sale $ 7,345,143 $ 59,737 $ 33,751 $ 7,371,129 Investment in marketable equity securities 85,554 37,744 151 123,147 Investment securities held to maturity Residential mortgage-backed securities 2,122,299 5,313 15,051 2,112,561 Commercial mortgage-backed securities 1,256,771 3 18,265 1,238,509 Other 2,008 — — 2,008 Total investment securities held to maturity 3,381,078 5,316 33,316 3,353,078 Total investment securities $ 10,811,775 $ 102,797 $ 67,218 $ 10,847,354 December 31, 2020 (Dollars in thousands) Amortized cost (1) Gross Gross unrealized Fair Investment securities available for sale U.S. Treasury $ 499,832 $ 101 $ — $ 499,933 Government agency 706,241 723 5,573 701,391 Residential mortgage-backed securities 4,369,130 70,283 1,310 4,438,103 Commercial mortgage-backed securities 745,892 25,645 — 771,537 Corporate bonds 590,870 14,437 2,028 603,279 Total investment securities available for sale $ 6,911,965 $ 111,189 $ 8,911 $ 7,014,243 Investment in marketable equity securities 84,837 8,654 1,811 91,680 Investment securities held to maturity Residential mortgage-backed securities 1,877,692 17,689 — 1,895,381 Commercial mortgage-backed securities 937,034 3,884 56 940,862 Other 2,256 — — 2,256 Total investment securities held to maturity 2,816,982 21,573 56 2,838,499 Total investment securities $ 9,813,784 $ 141,416 $ 10,778 $ 9,944,422 (1) Amortized cost includes any recorded ACL.
Investment Securities Maturity Information	The following table provides the amortized cost and fair value by contractual maturity for investment securities available for sale and held to maturity. Expected maturities will differ from contractual maturities on certain securities because issuers and borrowers of underlying collateral may have the right to call or prepay obligations with or without prepayment penalties. Residential and commercial mortgage-backed and government agency securities are stated separately as they are not due at a single maturity date. September 30, 2021 December 31, 2020 (Dollars in thousands) Amortized cost (1) Fair Amortized cost (1) Fair Investment securities available for sale Non-amortizing securities maturing in: One year or less $ 1,204 $ 1,208 $ 500,846 $ 500,954 One through five years 37,248 38,540 72,565 73,881 Five through 10 years 545,754 568,692 508,320 519,570 Over 10 years 16,700 16,663 8,971 8,807 Government agency 851,860 853,728 706,241 701,391 Residential mortgage-backed securities 4,800,194 4,801,646 4,369,130 4,438,103 Commercial mortgage-backed securities 1,092,183 1,090,652 745,892 771,537 Total investment securities available for sale $ 7,345,143 $ 7,371,129 $ 6,911,965 $ 7,014,243 Investment securities held to maturity Non-amortizing securities maturing in: One year or less 1,259 1,259 1,507 1,507 One through five years 749 749 749 749 Residential mortgage-backed securities 2,122,299 2,112,561 1,877,692 1,895,381 Commercial mortgage-backed securities 1,256,771 1,238,509 937,034 940,862 Total investment securities held to maturity $ 3,381,078 $ 3,353,078 $ 2,816,982 $ 2,838,499 (1) Amortized cost includes any recorded ACL.
Debt Securities, Available-for-sale	The following table provides the gross realized gains and losses on the sales of investment securities available for sale for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Gross realized gains on sales of investment securities available for sale $ 8,082 $ 21,425 $ 33,133 $ 55,651 Gross realized losses on sales of investment securities available for sale — — (14) (679) Net realized gains on sales of investment securities available for sale $ 8,082 $ 21,425 $ 33,119 $ 54,972
Marketable Securities Gains (Losses)	The following table provides the realized and unrealized gains and losses on marketable equity securities for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Marketable equity securities gains (losses), net $ 3,350 $ (2,701) $ 31,015 $ 10,461 Less net gains recognized on marketable equity securities sold — 2,568 263 39,884 Unrealized gains (losses) recognized on marketable equity securities held $ 3,350 $ (5,269) $ 30,752 $ (29,423)
Investment Securities With Unrealized Losses	The following table provides information regarding securities with unrealized losses as of September 30, 2021 and December 31, 2020: September 30, 2021 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Investment securities available for sale Government agency $ 302,114 $ 2,857 $ 119,231 $ 623 $ 421,345 $ 3,480 Residential mortgage-backed securities 2,137,675 17,752 1,762 $ 15 2,139,437 17,767 Commercial mortgage-backed securities 758,798 11,406 — $ — 758,798 11,406 Corporate bonds 42,593 1,042 10,444 $ 56 53,037 1,098 Total $ 3,241,180 $ 33,057 $ 131,437 $ 694 $ 3,372,617 $ 33,751 December 31, 2020 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Investment securities available for sale Government agency $ 268,622 $ 3,197 $ 328,777 $ 2,376 $ 597,399 $ 5,573 Residential mortgage-backed securities 433,816 1,241 23,064 69 456,880 1,310 Corporate bonds 57,715 2,028 — — 57,715 2,028 Total $ 760,153 $ 6,466 $ 351,841 $ 2,445 $ 1,111,994 $ 8,911

Loans and Leases (Tables)

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
Loans And Leases Outstanding	Loans and leases outstanding included the following at September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 Commercial: Construction and land development $ 1,247,680 $ 985,424 Owner occupied commercial mortgage 11,625,554 11,165,012 Non-owner occupied commercial mortgage 3,002,928 2,987,689 Commercial and industrial and leases 5,266,266 5,013,644 SBA-PPP 1,086,917 2,406,291 Total commercial loans 22,229,345 22,558,060 Consumer: Residential mortgage 5,701,346 5,561,686 Revolving mortgage 1,834,690 2,052,854 Construction and land development 391,768 348,123 Consumer auto 1,350,377 1,255,402 Consumer other 635,408 552,968 Total consumer loans 9,913,589 9,771,033 PCD loans 373,255 462,882 Total loans and leases $ 32,516,189 $ 32,791,975
Schedule of Amortized Cost of Loans	The following table presents selected components of the amortized cost of loans. (Dollars in thousands) September 30, 2021 December 31, 2020 Deferred fees, including unearned fees and unamortized costs on non-PCD loans Net deferred fees related to SBA-PPP loans $ 39,372 $ 41,064 Net deferred fees related to other portfolios 15,162 9,153 Total net deferred fees $ 54,534 $ 50,217 Net unamortized discount on purchased loans Non-PCD $ 13,350 $ 19,473 PCD 32,623 45,254 Total $ 45,973 $ 64,727
Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing	September 30, 2021 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 233 $ — $ 1,424 $ 1,657 $ 1,246,023 $ 1,247,680 Owner occupied commercial mortgage 7,210 5,553 8,198 20,961 11,604,593 11,625,554 Non-owner occupied commercial mortgage 752 1,245 6,716 8,713 2,994,215 3,002,928 Commercial and industrial and leases 10,309 3,234 9,690 23,233 5,243,033 5,266,266 SBA-PPP — — — — 1,086,917 1,086,917 Total commercial loans 18,504 10,032 26,028 54,564 22,174,781 22,229,345 Consumer: Residential mortgage 18,417 6,607 20,864 45,888 5,655,458 5,701,346 Revolving mortgage 5,587 1,443 4,513 11,543 1,823,147 1,834,690 Construction and land development 477 1,719 70 2,266 389,502 391,768 Consumer auto 5,345 1,173 1,263 7,781 1,342,596 1,350,377 Consumer other 2,197 1,122 1,295 4,614 630,794 635,408 Total consumer loans 32,023 12,064 28,005 72,092 9,841,497 9,913,589 PCD loans 11,407 5,200 27,111 43,718 329,537 373,255 Total loans and leases $ 61,934 $ 27,296 $ 81,144 $ 170,374 $ 32,345,815 $ 32,516,189 December 31, 2020 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 956 $ 527 $ 1,603 $ 3,086 $ 982,338 $ 985,424 Owner occupied commercial mortgage 8,757 2,232 14,082 25,071 11,139,941 11,165,012 Non-owner occupied commercial mortgage 12,370 — 5,973 18,343 2,969,346 2,987,689 Commercial and industrial and leases 14,532 2,842 3,243 20,617 4,993,027 5,013,644 SBA-PPP — — — — 2,406,291 2,406,291 Total commercial loans 36,615 5,601 24,901 67,117 22,490,943 22,558,060 Consumer: Residential mortgage 43,218 8,364 31,690 83,272 5,478,414 5,561,686 Revolving mortgage 11,977 2,626 7,415 22,018 2,030,836 2,052,854 Construction and land development 932 77 330 1,339 346,784 348,123 Consumer auto 6,825 1,835 1,076 9,736 1,245,666 1,255,402 Consumer other 3,610 1,464 1,505 6,579 546,389 552,968 Total consumer loans 66,562 14,366 42,016 122,944 9,648,089 9,771,033 PCD loans 18,322 6,076 31,026 55,424 407,458 462,882 Total loans and leases $ 121,499 $ 26,043 $ 97,943 $ 245,485 $ 32,546,490 $ 32,791,975 The amortized cost, by class, of loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at September 30, 2021 and December 31, 2020, were as follows: September 30, 2021 December 31, 2020 (Dollars in thousands) Nonaccrual Loans and Nonaccrual Loans and Commercial: Construction and land development $ 1,457 $ — $ 1,661 $ — Owner occupied commercial mortgage 19,886 601 23,103 3,625 Non-owner occupied commercial mortgage 10,613 — 7,932 147 Commercial and industrial and leases 20,689 1,414 10,626 540 Total commercial loans 52,645 2,015 43,322 4,312 Consumer: Residential mortgage 44,463 779 66,345 — Revolving mortgage 17,295 — 22,236 — Construction and land development 571 — 652 — Consumer auto 3,287 — 3,166 — Consumer other 476 1,033 823 1,195 Total consumer loans 66,092 1,812 93,222 1,195 PCD loans 45,038 1,787 54,939 355 Total loans and leases $ 163,775 $ 5,614 $ 191,483 $ 5,862
Composition Of The Loans And Leases Outstanding By Credit Quality Indicator	The following tables represent current credit quality indicators by origination year as of September 30, 2021. September 30, 2021 Commercial Loans Amortized Cost Basis by Origination Year Classification: 2021 2020 2019 2018 2017 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Construction and land development Pass $ 373,012 $ 451,926 $ 256,321 $ 98,892 $ 44,343 $ 12,396 $ 4,231 $ — $ 1,241,121 Special Mention 19 157 — 134 63 — — — 373 Substandard 300 38 326 1,442 4,070 10 — — 6,186 Total 373,331 452,121 256,647 100,468 48,476 12,406 4,231 — 1,247,680 Owner occupied commercial mortgage Pass 2,069,209 3,078,093 1,989,052 1,316,012 1,036,593 1,778,334 122,411 120 11,389,824 Special Mention 2,082 24,356 29,358 28,165 12,199 20,469 4,047 71 120,747 Substandard 9,459 7,495 22,482 10,947 18,598 39,695 6,307 — 114,983 Total 2,080,750 3,109,944 2,040,892 1,355,124 1,067,390 1,838,498 132,765 191 11,625,554 Non-owner occupied commercial mortgage Pass 438,949 770,507 587,335 278,507 283,867 507,411 31,876 — 2,898,452 Special Mention 495 487 263 10,219 800 5,654 500 — 18,418 Substandard 2,615 11,742 22,600 10,184 10,243 27,352 1,322 — 86,058 Total 442,059 782,736 610,198 298,910 294,910 540,417 33,698 — 3,002,928 Commercial and industrial and leases Pass 1,238,557 1,162,246 714,374 344,220 193,857 350,870 1,087,462 5,136 5,096,722 Special Mention 2,323 8,279 22,100 3,528 4,070 4,324 4,575 206 49,405 Substandard 7,765 7,978 4,770 4,241 3,175 4,221 17,392 1,280 50,822 Doubtful — — — — — 1 1 — 2 Ungraded — — — — — — 69,315 — 69,315 Total 1,248,645 1,178,503 741,244 351,989 201,102 359,416 1,178,745 6,622 5,266,266 SBA-PPP Pass 1,011,370 75,547 — — — — — — 1,086,917 Total commercial $ 5,156,155 $ 5,598,851 $ 3,648,981 $ 2,106,491 $ 1,611,878 $ 2,750,737 $ 1,349,439 $ 6,813 $ 22,229,345 Consumer and PCD Loans Amortized Cost Basis by Origination Year Days Past Due: 2021 2020 2019 2018 2017 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Residential mortgage Current $ 1,591,381 $ 1,651,853 $ 690,779 $ 410,446 $ 390,940 $ 900,129 $ 19,930 $ — $ 5,655,458 30-59 days 252 1,506 4,728 3,066 1,486 7,379 — — 18,417 60-89 days 788 295 — 764 881 3,879 — — 6,607 90 days or greater 55 713 1,059 1,511 3,084 14,193 249 — 20,864 Total 1,592,476 1,654,367 696,566 415,787 396,391 925,580 20,179 — 5,701,346 Revolving mortgage Current — — — — — — 1,700,947 122,200 1,823,147 30-59 days — — — — — — 2,939 2,648 5,587 60-89 days — — — — — — 378 1,065 1,443 90 days or greater — — — — — — 1,901 2,612 4,513 Total — — — — — — 1,706,165 128,525 1,834,690 Construction and land development Current 165,993 175,007 26,889 10,258 5,745 3,016 2,594 — 389,502 30-59 days 33 416 — — — 28 — — 477 60-89 days — 1,650 — — 69 — — — 1,719 90 days or greater — 29 — — — 41 — — 70 Total 166,026 177,102 26,889 10,258 5,814 3,085 2,594 — 391,768 Consumer auto Current 504,537 384,849 229,033 139,764 59,487 24,926 — — 1,342,596 30-59 days 889 1,262 1,450 877 586 281 — — 5,345 60-89 days 200 330 234 255 84 70 — — 1,173 90 days or greater 140 347 420 228 83 45 — — 1,263 Total 505,766 386,788 231,137 141,124 60,240 25,322 — — 1,350,377 Consumer other Current 117,047 33,700 16,222 5,431 5,011 29,871 423,512 — 630,794 30-59 days 89 63 18 24 — 13 1,990 — 2,197 60-89 days 11 25 89 1 — — 996 — 1,122 90 days or greater 49 12 17 1 — — 1,216 — 1,295 Total 117,196 33,800 16,346 5,457 5,011 29,884 427,714 — 635,408 Total consumer $ 2,381,464 $ 2,252,057 $ 970,938 $ 572,626 $ 467,456 $ 983,871 $ 2,156,652 $ 128,525 $ 9,913,589 PCD loans Current $ — $ 23,091 $ 23,792 $ 21,034 $ 20,864 $ 213,681 $ 10,622 $ 16,453 $ 329,537 30-59 days — 846 61 785 1,393 7,777 113 432 11,407 60-89 days — 98 149 48 — 4,699 29 177 5,200 90 days or greater — 806 230 3,698 1,070 20,319 16 972 27,111 Total PCD $ — $ 24,841 $ 24,232 $ 25,565 $ 23,327 $ 246,476 $ 10,780 $ 18,034 $ 373,255 Total loans and leases $ 7,537,619 $ 7,875,749 $ 4,644,151 $ 2,704,682 $ 2,102,661 $ 3,981,084 $ 3,516,871 $ 153,372 $ 32,516,189 The following tables represent current credit quality indicators by origination year as of December 31, 2020. December 31, 2020 Commercial Loans Amortized Cost Basis by Origination Year Classification: 2020 2019 2018 2017 2016 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Construction and land development Pass $ 342,183 $ 341,233 $ 190,429 $ 50,776 $ 23,969 $ 11,306 $ 10,969 $ — $ 970,865 Special Mention 246 — 6,421 5,342 — — 153 — 12,162 Substandard 229 629 1,450 — 8 81 — — 2,397 Total 342,658 341,862 198,300 56,118 23,977 11,387 11,122 — 985,424 Owner occupied commercial mortgage Pass 3,183,467 2,201,165 1,625,141 1,301,412 1,049,858 1,454,020 101,556 133 10,916,752 Special Mention 6,274 20,702 36,739 12,387 17,699 25,693 5,115 72 124,681 Substandard 10,280 19,052 9,842 20,928 13,736 41,303 8,438 — 123,579 Total 3,200,021 2,240,919 1,671,722 1,334,727 1,081,293 1,521,016 115,109 205 11,165,012 Non-owner occupied commercial mortgage Pass 865,514 609,975 378,136 331,800 282,810 391,517 32,149 — 2,891,901 Special Mention 569 905 10,794 1,808 5,121 3,279 483 — 22,959 Substandard 2,899 18,546 12,296 8,764 14,087 15,427 810 — 72,829 Total 868,982 629,426 401,226 342,372 302,018 410,223 33,442 — 2,987,689 Commercial and industrial and leases Pass 1,620,622 983,852 504,463 310,468 234,735 286,996 899,978 5,520 4,846,634 Special Mention 3,146 17,065 7,265 5,393 3,307 4,912 9,152 189 50,429 Substandard 17,811 4,095 4,370 4,257 2,548 3,801 22,384 983 60,249 Ungraded — — — — — — 56,332 — 56,332 Total 1,641,579 1,005,012 516,098 320,118 240,590 295,709 987,846 6,692 5,013,644 SBA-PPP Pass 2,406,291 — — — — — — — 2,406,291 Total commercial $ 8,459,531 $ 4,217,219 $ 2,787,346 $ 2,053,335 $ 1,647,878 $ 2,238,335 $ 1,147,519 $ 6,897 $ 22,558,060 Consumer and PCD Loans Amortized Cost Basis by Origination Year Days Past Due: 2020 2019 2018 2017 2016 Prior Revolving Revolving converted to term loans Total (Dollars in thousands) Residential mortgage Current $ 1,882,683 $ 978,298 $ 655,798 $ 596,309 $ 461,719 $ 878,634 $ 24,973 $ — $ 5,478,414 30-59 days 2,278 4,573 11,463 3,772 8,613 12,299 220 — 43,218 60-89 days 30 100 1,246 1,449 834 4,705 — — 8,364 90 days or greater 282 4,831 3,150 4,015 5,689 13,723 — — 31,690 Total 1,885,273 987,802 671,657 605,545 476,855 909,361 25,193 — 5,561,686 Revolving mortgage Current — — — — — — 1,879,968 150,868 2,030,836 30-59 days — — — — — — 8,241 3,736 11,977 60-89 days — — — — — — 527 2,099 2,626 90 days or greater — — — — — — 2,301 5,114 7,415 Total — — — — — — 1,891,037 161,817 2,052,854 Construction and land development Current 215,112 85,707 24,860 10,269 6,093 2,218 2,525 — 346,784 30-59 days — 420 121 370 — 21 — — 932 60-89 days — — — 9 — 68 — — 77 90 days or greater — — — — — 330 — — 330 Total 215,112 86,127 24,981 10,648 6,093 2,637 2,525 — 348,123 Consumer auto Current 521,719 340,594 219,597 104,280 49,872 9,604 — — 1,245,666 30-59 days 2,175 1,873 1,257 842 544 134 — — 6,825 60-89 days 329 689 312 351 109 45 — — 1,835 90 days or greater 170 527 217 57 102 3 — — 1,076 Total 524,393 343,683 221,383 105,530 50,627 9,786 — — 1,255,402 Consumer other Current 53,842 27,117 10,911 7,159 2,980 29,336 415,044 — 546,389 30-59 days 322 114 77 18 11 7 3,061 — 3,610 60-89 days 102 20 13 18 3 23 1,285 — 1,464 90 days or greater 53 84 8 — — — 1,360 — 1,505 Total 54,319 27,335 11,009 7,195 2,994 29,366 420,750 — 552,968 Total consumer $ 2,679,097 $ 1,444,947 $ 929,030 $ 728,918 $ 536,569 $ 951,150 $ 2,339,505 $ 161,817 $ 9,771,033 PCD loans Current $ 31,475 $ 25,425 $ 27,183 $ 27,955 $ 28,995 $ 232,186 $ 13,212 $ 21,027 $ 407,458 30-59 days 999 925 801 718 1,341 12,637 156 745 18,322 60-89 days 447 81 312 695 97 4,098 9 337 6,076 90 days or greater 721 2,325 4,755 1,208 897 19,963 111 1,046 31,026 Total PCD $ 33,642 $ 28,756 $ 33,051 $ 30,576 $ 31,330 $ 268,884 $ 13,488 $ 23,155 $ 462,882 Total loans and leases $ 11,172,270 $ 5,690,922 $ 3,749,427 $ 2,812,829 $ 2,215,777 $ 3,458,369 $ 3,500,512 $ 191,869 $ 32,791,975
Schedule of Loans Pledged as Collateral	The following table provides information regarding loans pledged as collateral for borrowing capacity through the FHLB of Atlanta and the Federal Reserve Bank (“FRB”) as of September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 FHLB of Atlanta Lendable collateral value of pledged non-PCD loans $ 9,171,610 $ 8,637,844 Less: Advances 645,663 652,675 Available borrowing capacity $ 8,525,947 $ 7,985,169 Pledged non-PCD loans $ 12,646,208 $ 12,157,153 FRB Lendable collateral value of pledged non-PCD loans $ 3,795,878 $ 3,321,762 Less: Advances — — Available borrowing capacity $ 3,795,878 $ 3,321,762 Pledged non-PCD loans $ 4,610,291 $ 4,104,866

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Allowance for Credit Losses	Activity in the ACL by portfolio segment is summarized as follows: Three months ended September 30, 2021 (Dollars in thousands) Commercial Consumer PCD Total Allowance for credit losses: Balance at July 1 $ 76,082 $ 94,272 $ 18,740 $ 189,094 Provision (credit) 975 (223) (1,872) (1,120) Charge-offs (5,967) (4,307) (799) (11,073) Recoveries 1,594 2,330 2,369 6,293 Balance at September 30 $ 72,684 $ 92,072 $ 18,438 $ 183,194 Three months ended September 30, 2020 (Dollars in thousands) Commercial Consumer PCD Total Balance at July 1 $ 76,177 $ 119,345 $ 26,928 $ 222,450 Provision (credit) 4,793 1,874 (2,625) 4,042 Charge-offs (3,328) (5,109) (495) (8,932) Recoveries 2,338 2,719 1,319 6,376 Balance at September 30 $ 79,980 $ 118,829 $ 25,127 $ 223,936 Nine months ended September 30, 2021 (Dollars in thousands) Commercial Consumer PCD Total Balance at January 1 $ 80,842 $ 119,485 $ 23,987 $ 224,314 Provision (credit) 332 (23,208) (8,821) (31,697) Charge-offs (12,342) (12,804) (2,018) (27,164) Recoveries 3,852 8,599 5,290 17,741 Balance at September 30 $ 72,684 $ 92,072 $ 18,438 $ 183,194 Nine months ended September 30, 2020 (Dollars in thousands) Commercial Consumer PCD Total Balance at December 31 $ 142,369 $ 75,236 $ 7,536 $ 225,141 Adoption of ASC 326 (87,554) 30,629 19,001 (37,924) Balance at January 1 54,815 105,865 26,537 187,217 Provision (credit) 32,854 25,066 (4,971) 52,949 Initial allowance on PCD loans — — 1,193 1,193 Charge-offs (12,712) (19,535) (3,010) (35,257) Recoveries 5,023 7,433 5,378 17,834 Balance at September 30 $ 79,980 $ 118,829 $ 25,127 $ 223,936 BancShares records an allowance for credit losses on unfunded commitments within other liabilities. Activity in the allowance for credit losses for unfunded commitments is summarized as follows: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Allowance for credit losses: Beginning balance $ 11,103 $ 13,685 $ 12,814 $ 1,055 Adoption of ASC 326 — — — 8,885 Adjusted beginning balance $ 11,103 $ 13,685 $ 12,814 $ 9,940 Provision (credit) 369 286 (1,342) 4,031 Ending balance 11,472 13,971 11,472 13,971 The following table presents information on collateral-dependent loans by class and includes the amortized cost of collateral-dependent loans and leases, the net realizable value of the collateral, the extent to which collateral secures collateral-dependent loans and the associated ACL as of September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 (Dollars in thousands) Collateral-Dependent Loans Net Realizable Value of Collateral Collateral Coverage Allowance for Credit Losses Commercial: Construction and land development $ 1,424 $ 1,964 137.9 % $ — Owner occupied commercial mortgage 7,411 8,367 112.9 — Non-owner occupied commercial mortgage 8,204 11,307 137.8 1,203 Commercial and industrial and leases 4,787 6,530 136.4 230 Total commercial loans 21,826 28,168 129.1 1,433 Consumer: Residential mortgage 11,423 14,625 128.0 — Revolving mortgage — — — — Total consumer loans 11,423 14,625 128.0 — PCD loans 18,154 32,788 180.6 — Total collateral-dependent loans $ 51,403 $ 75,581 147.0 % $ 1,433 December 31, 2020 (Dollars in thousands) Collateral-Dependent Loans Net Realizable Value of Collateral Collateral Coverage Allowance for Credit Losses Commercial: Construction and land development $ 1,424 $ 1,795 126.1 % $ — Owner occupied commercial mortgage 9,792 14,253 145.6 — Non-owner occupied commercial mortgage 5,556 7,577 136.4 — Total commercial loans 16,772 23,625 140.9 — Consumer: Residential mortgage 23,011 29,775 129.4 131 PCD loans 19,042 27,872 146.4 — Total collateral-dependent loans $ 58,825 $ 81,272 138.2 % $ 131
Troubled Debt Restructurings on Financing Receivables	The following tables provides a summary of total TDRs by accrual status: September 30, 2021 December 31, 2020 (Dollars in thousands) Accruing Nonaccruing Total Accruing Nonaccruing Total Commercial: Construction and land development $ 346 $ 33 $ 379 $ 578 $ 54 $ 632 Owner occupied commercial mortgage 46,255 10,661 56,916 37,574 10,889 48,463 Non-owner occupied commercial mortgage 20,022 3,763 23,785 18,336 1,649 19,985 Commercial and industrial and leases 12,506 11,295 23,801 29,131 3,528 32,659 Total commercial loans 79,129 25,752 104,881 85,619 16,120 101,739 Consumer: Residential mortgage 22,106 14,937 37,043 29,458 19,380 48,838 Revolving mortgage 16,533 6,925 23,458 20,124 7,128 27,252 Construction and land development 2,380 282 2,662 1,573 9 1,582 Consumer auto 1,888 636 2,524 2,018 696 2,714 Consumer other 774 61 835 955 137 1,092 Total consumer loans 43,681 22,841 66,522 54,128 27,350 81,478 PCD loans 29,207 12,365 41,572 17,617 7,346 24,963 Total loans $ 152,017 $ 60,958 $ 212,975 $ 157,364 $ 50,816 $ 208,180 The following table provides the types of modifications designated as TDRs during the three and nine months ended September 30, 2021 and 2020. Three months ended September 30, 2021 Three months ended September 30, 2020 All restructurings All restructurings (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 7 $ 9,639 6 $ 5,703 Loan term extension 41 6,371 29 2,380 Below market interest rate 47 3,126 55 15,341 Discharged from bankruptcy 21 2,783 55 1,654 Total restructurings 116 $ 21,919 145 $ 25,078 Nine months ended September 30, 2021 Nine months ended September 30, 2020 All restructurings All restructurings (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 17 $ 19,728 23 $ 24,847 Loan term extension 112 14,500 62 5,885 Below market interest rate 148 21,004 212 38,740 Discharged from bankruptcy 110 12,478 165 7,025 Total restructurings 387 $ 67,710 462 $ 76,497 For the nine months ended September 30, 2021 and 2020, the pre-modification and post-modification outstanding amortized cost of loans modified as TDRs were not materially different.

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2021
Other Real Estate [Abstract]
Changes in other real estate owned	The following table explains changes in other real estate owned (“OREO”) during the nine months ended September 30, 2021 and 2020: (Dollars in thousands) OREO Balance at December 31, 2020 $ 50,890 Additions 16,454 Sales (24,311) Write-downs/losses (2,384) Balance at September 30, 2021 $ 40,649 Balance at December 31, 2019 $ 46,591 Additions 18,428 Acquired in business combinations 9,813 Sales (18,645) Write-downs/losses (3,398) Balance at September 30, 2020 $ 52,789

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2021
Mortgage Servicing Rights [Abstract]
Mortgage servicing rights	The following table presents changes in the servicing asset during the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Beginning balance $ 21,985 $ 18,664 $ 18,426 $ 22,963 Servicing rights originated 1,891 1,994 8,436 5,673 Amortization (2,180) (2,208) (6,505) (6,150) Valuation allowance (increase) decrease — (305) 1,339 (4,341) Ending balance $ 21,696 $ 18,145 $ 21,696 $ 18,145
Schedule of Activity in Servicing Asset Valuation Allowance	The following table presents the activity in the servicing asset valuation allowance for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Beginning balance $ 3,026 $ 4,258 $ 4,365 $ 222 Valuation allowance increase (decrease) — 305 (1,339) 4,341 Ending balance $ 3,026 $ 4,563 $ 3,026 $ 4,563
Mortgage servicing rights economic assumptions	Mortgage servicing rights valuations are performed using a pooling methodology where loans with similar risk characteristics are grouped together and evaluated using discounted cash flows to estimate the present value of future earnings. Key economic assumptions used to value mortgage servicing rights were as follows: September 30, 2021 December 31, 2020 Discount rate - conventional fixed loans 8.49 % 7.92 % Discount rate - all loans excluding conventional fixed loans 9.49 % 8.92 % Weighted average constant prepayment rate 17.32 % 20.62 % Weighted average cost to service a loan $ 87.58 $ 87.58

FDIC Shared-Loss Payable (Table

FDIC Shared-Loss Payable (Tables)	9 Months Ended
	Sep. 30, 2021
FDIC Shared-Loss Receivable [Abstract]
Changes In Payable to FDIC	The following table provides changes in the FDIC shared-loss payable since December 31, 2020: (Dollars in thousands) Total Balance at December 31, 2020 $ 15,601 Accretion 502 Payment made to the FDIC to settle shared-loss agreement (16,103) Balance at September 30, 2021 $ —

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive (loss) income included the following as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (Dollars in thousands) Accumulated Deferred Accumulated Accumulated Deferred Accumulated Unrealized gains on securities available for sale $ 25,986 $ 5,977 $ 20,009 $ 102,278 $ 23,524 $ 78,754 Unrealized gains on securities available for sale transferred to held to maturity 3,709 853 2,856 5,399 1,242 4,157 Defined benefit pension items (71,431) (16,429) (55,002) (91,751) (21,103) (70,648) Total $ (41,736) $ (9,599) $ (32,137) $ 15,926 $ 3,663 $ 12,263 The following table highlights changes in accumulated other comprehensive (loss) income by component for the three and nine months ended September 30, 2021 and 2020: Three months ended September 30, 2021 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 34,910 $ 3,187 $ (60,217) $ (22,120) Net unrealized losses arising during period (8,677) — — (8,677) Amounts reclassified from accumulated other comprehensive loss (6,224) (331) 5,215 (1,340) Net current period other comprehensive (loss) income (14,901) (331) 5,215 (10,017) Ending balance $ 20,009 $ 2,856 $ (55,002) $ (32,137) Three months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 113,102 $ — $ (122,766) $ (9,664) Net unrealized gains arising during period 7,530 — — 7,530 Amounts reclassified from accumulated other comprehensive loss (16,497) — 4,875 (11,622) Net current period other comprehensive income (8,967) — 4,875 (4,092) Ending balance $ 104,135 $ — $ (117,891) $ (13,756) Nine months ended September 30, 2021 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 78,754 $ 4,157 $ (70,648) $ 12,263 Net unrealized losses arising during period (33,243) — — (33,243) Amounts reclassified from accumulated other comprehensive income (25,502) (1,301) 15,646 (11,157) Net current period other comprehensive (loss) income (58,745) (1,301) 15,646 (44,400) Ending balance $ 20,009 $ 2,856 $ (55,002) $ (32,137) Nine months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized gains on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 5,792 $ — $ (132,515) $ (126,723) Net unrealized gains arising during period 140,671 — — 140,671 Amounts reclassified from accumulated other comprehensive loss (42,328) — 14,624 (27,704) Net current period other comprehensive income 98,343 — 14,624 112,967 Ending balance $ 104,135 $ — $ (117,891) $ (13,756)
Reclassification out of Accumulated Other Comprehensive Income	The following table presents the amounts reclassified from accumulated other comprehensive (loss) income and the line item affected in the statement where net income is presented for the three and nine months ended September 30, 2021 and 2020: (Dollars in thousands) Three months ended September 30, 2021 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 8,082 Realized gains on investment securities available for sale, net (1,858) Income taxes $ 6,224 Accretion of unrealized gains on securities available for sale transferred to held to maturity $ 430 Net interest income (99) Income taxes $ 331 Amortization of defined benefit pension actuarial losses (6,773) Other noninterest expense 1,558 Income taxes $ (5,215) Total reclassifications for the period $ 1,340 (Dollars in thousands) Three months ended September 30, 2020 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 21,425 Realized gains on investment securities available for sale, net (4,928) Income taxes $ 16,497 Amortization of defined benefit pension actuarial losses (6,332) Other noninterest expense 1,457 Income taxes $ (4,875) Total reclassifications for the period $ 11,622 (Dollars in thousands) Nine months ended September 30, 2021 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 33,119 Realized gains on investment securities available for sale, net (7,617) Income taxes $ 25,502 Amortization of unrealized losses on securities available for sale transferred to held to maturity $ 1,690 Net interest income (389) Income taxes $ 1,301 Amortization of defined benefit pension actuarial losses $ (20,320) Other noninterest expense 4,674 Income taxes $ (15,646) Total reclassifications for the period $ 11,157 (Dollars in thousands) Nine months ended September 30, 2020 Details about accumulated other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Affected line item in the statement where net income is presented Unrealized gains on securities available for sale $ 54,972 Realized gains on investment securities available for sale, net (12,644) Income taxes $ 42,328 Amortization of defined benefit pension actuarial losses (18,994) Other noninterest expense 4,370 Income taxes $ (14,624) Total reclassifications for the period $ 27,704

Estimated Fair Values (Tables)

Estimated Fair Values (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Estimated Fair Values For Certain Financial Assets And Financial Liabilities	The table presents the carrying values and estimated fair values for financial instruments as of September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 Carrying value Fair value Carrying value Fair value Assets Cash and due from banks $ 337,450 $ 337,450 $ 362,048 $ 362,048 Overnight investments 9,875,063 9,875,063 4,347,336 4,347,336 Investment in marketable equity securities 123,147 123,147 91,680 91,680 Investment securities available for sale 7,371,129 7,371,129 7,014,243 7,014,243 Investment securities held to maturity 3,381,078 3,353,078 2,816,982 2,838,499 Loans held for sale 98,451 98,451 124,837 124,837 Net loans and leases 32,332,995 32,349,172 32,567,661 33,298,166 Income earned not collected 132,911 132,911 145,694 145,694 Federal Home Loan Bank stock 40,450 40,450 45,392 45,392 Mortgage and other servicing rights 22,263 22,624 19,628 20,283 Liabilities Deposits with no stated maturity 47,492,194 47,492,194 40,542,596 40,542,596 Time deposits 2,573,568 2,573,131 2,889,013 2,905,577 Securities sold under customer repurchase agreements 663,575 663,575 641,487 641,487 Federal Home Loan Bank borrowings 645,663 659,625 655,175 677,579 Subordinated debt 497,427 520,871 504,518 525,610 Other borrowings 76,139 76,643 88,470 89,263 FDIC shared-loss payable — — 15,601 15,843 Accrued interest payable 6,560 6,560 9,414 9,414
Assets And Liabilities Carried At Fair Value On A Recurring Basis	For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of September 30, 2021 and December 31, 2020: September 30, 2021 Fair value measurements using: (Dollars in thousands) Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets measured at fair value Investment securities available for sale Government agency $ 853,728 $ — $ 853,728 $ — Residential mortgage-backed securities 4,801,646 — 4,801,646 — Commercial mortgage-backed securities 1,090,652 — 1,090,652 — Corporate bonds 625,103 — 316,968 308,135 Total investment securities available for sale $ 7,371,129 $ — $ 7,062,994 $ 308,135 Marketable equity securities $ 123,147 $ 52,991 $ 70,156 $ — Loans held for sale $ 98,451 $ — $ 98,451 $ — December 31, 2020 Fair value measurements using: Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets measured at fair value Investment securities available for sale U.S. Treasury $ 499,933 $ — $ 499,933 $ — Government agency 701,391 — 701,391 — Residential mortgage-backed securities 4,438,103 — 4,438,103 — Commercial mortgage-backed securities 771,537 — 771,537 — Corporate bonds 603,279 — 286,655 316,624 Total investment securities available for sale $ 7,014,243 $ — $ 6,697,619 $ 316,624 Marketable equity securities $ 91,680 $ 32,855 $ 58,825 $ — Loans held for sale $ 124,837 $ — $ 124,837 $ —
Fair Value of Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following tables summarize activity for Level 3 assets carried at fair value on a recurring basis: Corporate bonds Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Beginning balance $ 325,448 $ 169,977 $ 316,624 $ 69,685 Purchases 23,878 78,000 30,878 178,595 Unrealized net losses (gains) included in other comprehensive income 436 2,818 3,927 901 Amounts included in net income 2,504 (81) 2,687 (249) Transfers in — — — 1,782 Sales / Calls (44,131) — (45,981) — Ending balance $ 308,135 $ 250,714 $ 308,135 $ 250,714
Fair Value Level 3 Significant Unobservable Input Assumptions	(Dollars in thousands) September 30, 2021 Level 3 assets Valuation technique Significant unobservable input Fair Value Corporate bonds Indicative bid provided by broker Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the issuer $ 308,135
Fair Value Option	The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential real estate originated for sale measured at fair value as of September 30, 2021 and December 31, 2020: September 30, 2021 (Dollars in thousands) Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 98,451 $ 95,396 $ 3,055 December 31, 2020 Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 124,837 $ 118,902 $ 5,935 No originated loans held for sale were 90 or more days past due or on nonaccrual status as of September 30, 2021 or December 31, 2020. BancShares may be required to measure certain financial assets at fair value on a nonrecurring basis. These adjustments to fair value usually result from the application of lower of amortized cost or fair value accounting or write-downs of individual assets due to impairment. The population of loans measured at fair value on a non-recurring basis is limited to collateral-dependent loans evaluated individually. These collateral-dependent loans are deemed to be at fair value if there is an associated ACL or if a charge-off has been recorded in the previous 12 months. A large majority of collateral for these loans is real property. Collateral values are determined using appraisals or other third-party value estimates of the subject property discounted based on estimated selling costs, generally between 5% and 10%, and immaterial adjustments for other external factors that may impact the marketability of the collateral. The weighted average discount for estimated selling costs applied to real estate collateral was 8%.
Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis	For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of September 30, 2021 and December 31, 2020: September 30, 2021 Fair value measurements using: (Dollars in thousands) Fair value Level 1 inputs Level 2 inputs Level 3 inputs Collateral-dependent loans $ 12,185 $ — $ — $ 12,185 Other real estate owned 32,391 — — 32,391 Mortgage servicing rights 20,210 — — 20,210 December 31, 2020 Fair value measurements using: Fair value Level 1 inputs Level 2 inputs Level 3 inputs Collateral-dependent loans $ 11,779 $ — $ — $ 11,779 Other real estate owned 40,115 — — 40,115 Mortgage servicing rights 16,966 — — 16,966

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2021
Retirement Benefits, Description [Abstract]
Schedule of Net Benefit Costs	For the three and nine months ended September 30, 2021 and 2020, the components of net periodic benefit cost are as follows: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2021 2020 2021 2020 Service cost $ 3,838 $ 3,570 $ 11,514 $ 10,709 Interest cost 7,466 8,549 22,398 25,648 Expected return on assets (19,607) (16,423) (58,823) (49,267) Amortization of net actuarial loss 6,773 6,332 20,320 18,994 Net periodic (benefit) cost $ (1,530) $ 2,028 $ (4,591) $ 6,084

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Schedule of Operating and Finance Lease Assets and Liabilities	The following table presents right-of-use lease assets and liabilities as of September 30, 2021 and December 31, 2020: (Dollars in thousands) Classification September 30, 2021 December 31, 2020 Assets: Operating Other assets $ 62,214 $ 68,048 Finance Premises and equipment 4,852 6,478 Total leased assets $ 67,066 $ 74,526 Liabilities: Operating Other liabilities $ 63,025 $ 68,343 Finance Other borrowings 4,720 6,308 Total lease liabilities $ 67,745 $ 74,651

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Schedule of fair falue for off-balance sheet risks	The following table presents the commitments to extend credit and standby letters of credit as of September 30, 2021 and December 31, 2020: (Dollars in thousands) September 30, 2021 December 31, 2020 Unused commitments to extend credit $ 12,775,929 $ 12,098,417 Standby letters of credit 116,302 129,819

Accounting Policies and Basis_3

Accounting Policies and Basis of Presentation Accounting Policies and Basis of Presentation (Recently Adopted Accounting Standards) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021shares	Sep. 30, 2020USD ($)$ / sharesshares	Sep. 30, 2021USD ($)loan	Sep. 30, 2020USD ($)$ / sharesshares	Dec. 31, 2020USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock repurchased during period (in USD per share) | $ / shares		$ 399.82
SBA-PPP Loan			$ 32,516,189		$ 32,791,975
SBA-PPP
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of loans originated | loan			12,000
Loans receivable, period increase			$ 1,200,000
SBA-PPP Loan			$ 1,100,000
Class A Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock repurchased during period (in shares) | shares		117,700		813,090
Stock repurchased during period		$ 47,060		$ 333,755
Stock repurchased during period (in USD per share) | $ / shares				$ 410.48
Class A Common Stock | Repurchases From Ella Ann Holding
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock repurchased during period (in shares) | shares	45,000

Business Combinations - Merger

Business Combinations - Merger (Details)	Oct. 15, 2020$ / shares	Sep. 30, 2021$ / shares	Dec. 31, 2020$ / shares
Subsequent Event [Line Items]
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01
Class A Common Stock
Subsequent Event [Line Items]
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1
CIT Group Inc.
Subsequent Event [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
CIT Group Inc. | BancShares Class A Common Stock
Subsequent Event [Line Items]
Conversion rate	0.06200
CIT Group Inc. | Fixed-To-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series A
Subsequent Event [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01
CIT Group Inc. | Non-Cumulative Perpetual Preferred Stock, Series B
Subsequent Event [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01
Dividend rate (percentage)	5.625%
CIT Group Inc. | Series B Preferred Stock
Subsequent Event [Line Items]
Conversion rate	1
CIT Group Inc. | Series C Preferred Stock
Subsequent Event [Line Items]
Conversion rate	1

Investments (Aggregate Values a

Investments (Aggregate Values and Unrealized Gains and Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities available for sale
Investment in marketable equity securities at cost	$ 85,554	$ 84,837
Investment in marketable equity securities, gross unrealized gains	37,744	8,654
Investment in marketable equity securities, gross unrealized losses	151	1,811
Fair value	123,147	91,680
Investment securities held to maturity
Debt Securities, Held-to-maturity, Total	3,381,078	2,816,982
Gross unrealized gains	5,316
Gross unrealized losses	33,316
Fair value	3,353,078	2,838,499
Debt Securities, Available-for-sale, Held-to-maturity and Equity Securities, Cost	10,811,775	9,813,784
Gross unrealized gains	102,797	141,416
Gross unrealized losses	67,218	10,778
Fair value	10,847,354	9,944,422
Investment securities available for sale at cost	7,345,143	6,911,965
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	59,737	111,189
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	33,751	8,911
Debt Securities, Available-for-sale	7,371,129	7,014,243
Interest receivable, available-for-sale debt securities	21,100	17,600
Interest receivable, held-to-maturity debt securities	6,000	5,400
U.S. Treasury
Investment securities held to maturity
Investment securities available for sale at cost		499,832
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		101
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		0
Debt Securities, Available-for-sale		499,933
Government agency
Investment securities held to maturity
Investment securities available for sale at cost	851,860	706,241
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	5,348	723
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,480	5,573
Debt Securities, Available-for-sale	853,728	701,391
Residential Mortgage Backed Securities
Investment securities held to maturity
Debt Securities, Held-to-maturity, Total	2,122,299	1,877,692
Gross unrealized gains	5,313	17,689
Gross unrealized losses	15,051	0
Fair value	2,112,561	1,895,381
Investment securities available for sale at cost	4,800,194	4,369,130
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	19,219	70,283
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	17,767	1,310
Debt Securities, Available-for-sale	4,801,646	4,438,103
Commercial Mortgage Backed Securities
Investment securities held to maturity
Debt Securities, Held-to-maturity, Total	1,256,771	937,034
Gross unrealized gains	3	3,884
Gross unrealized losses	18,265	56
Fair value	1,238,509	940,862
Investment securities available for sale at cost	1,092,183	745,892
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	9,875	25,645
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	11,406	0
Debt Securities, Available-for-sale	1,090,652	771,537
Residential mortgage-backed securities
Investment securities held to maturity
Debt Securities, Held-to-maturity, Total		2,816,982
Gross unrealized gains		21,573
Gross unrealized losses		56
Fair value		2,838,499
Commercial mortgage-backed securities
Investment securities held to maturity
Investment securities available for sale at cost	600,906	590,870
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	25,295	14,437
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,098	2,028
Debt Securities, Available-for-sale	625,103	603,279
Other
Investment securities held to maturity
Debt Securities, Held-to-maturity, Total	2,008	2,256
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	$ 2,008	$ 2,256

Investments (Maturity Informati

Investments (Maturity Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities held to maturity
Investment securities held to maturity at cost	$ 3,381,078	$ 2,816,982
Investment securities held to maturity at fair value	3,353,078	2,838,499
Investment securities available for sale at cost	7,345,143	6,911,965
Debt Securities, Available-for-sale	7,371,129	7,014,243
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	1,259	1,507
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	1,259	1,507
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	749	749
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	749	749
Debt Securities
Investment securities available for sale
Maturing in one year or less, cost	1,204	500,846
Maturing in one through five years, cost	37,248	72,565
Maturing in five through ten years, cost	545,754	508,320
Maturing in over ten years, cost	16,700	8,971
Maturing in one year or less, fair value	1,208	500,954
Maturing in one through five years, fair value	38,540	73,881
Maturing in five through ten yeas, fair value	568,692	519,570
Maturing in over ten years, fair value	16,663	8,807
Agency Securities
Investment securities held to maturity
Investment securities available for sale at cost	851,860	706,241
Debt Securities, Available-for-sale	853,728	701,391
Residential Mortgage Backed Securities
Investment securities held to maturity
Investment securities held to maturity at cost	2,122,299	1,877,692
Commercial mortgage-backed securities	2,112,561	1,895,381
Investment securities held to maturity at fair value	2,112,561	1,895,381
Investment securities available for sale at cost	4,800,194	4,369,130
Debt Securities, Available-for-sale	4,801,646	4,438,103
Commercial Mortgage Backed Securities
Investment securities held to maturity
Investment securities held to maturity at cost	1,256,771	937,034
Commercial mortgage-backed securities	1,238,509	940,862
Investment securities held to maturity at fair value	1,238,509	940,862
Investment securities available for sale at cost	1,092,183	745,892
Debt Securities, Available-for-sale	$ 1,090,652	771,537
Residential mortgage-backed securities
Investment securities held to maturity
Investment securities held to maturity at cost		2,816,982
Investment securities held to maturity at fair value		$ 2,838,499

Investments (Available-for-sale

Investments (Available-for-sale Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Available for sale securities, realized gains	$ 8,082	$ 21,425	$ 33,133	$ 55,651
Available for sale securities, realized loss	0	0	(14)	(679)
Available for sale securities, realized gain (loss)	$ 8,082	$ 21,425	$ 33,119	$ 54,972

Investments Marketable Equity S

Investments Marketable Equity Securities Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Marketable Equity Securities Gains (Losses) [Abstract]
Marketable equity securities gains (losses), net	$ 3,350	$ (2,701)	$ 31,015	$ 10,461
Less net gains recognized on marketable equity securities sold	0	2,568	263	39,884
Unrealized gains (losses) recognized on marketable equity securities held	$ 3,350	$ (5,269)	$ 30,752	$ (29,423)

Investments (Unrealized Losses)

Investments (Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 3,241,180	$ 760,153
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	33,057	6,466
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	131,437	351,841
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	694	2,445
Debt Securities, Available-for-sale, Unrealized Loss Position	3,372,617	1,111,994
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	33,751	8,911
Agency Securities
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	302,114	268,622
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,857	3,197
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	119,231	328,777
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	623	2,376
Debt Securities, Available-for-sale, Unrealized Loss Position	421,345	597,399
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	3,480	5,573
Residential Mortgage Backed Securities
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	2,137,675	433,816
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	17,752	1,241
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,762	23,064
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	15	69
Debt Securities, Available-for-sale, Unrealized Loss Position	2,139,437	456,880
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	17,767	1,310
Commercial Mortgage Backed Securities
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	758,798
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	11,406
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-sale, Unrealized Loss Position	758,798
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	11,406
Corporate bonds
Investment securities available for sale:
Debt Securities, Available-for-sale, Unrealized Loss Position		57,715
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		2,028
Corporate Bonds
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	42,593	57,715
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,042	2,028
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	10,444	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	56	$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position	53,037
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,098

Investments (Narrative) (Detail

Investments (Narrative) (Details) shares in Thousands	Nov. 01, 2020USD ($)	Sep. 30, 2021USD ($)investmentinvestmentsshares	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)investmentinvestmentsshares	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Schedule of Investments [Line Items]
Unrealized gain at the date of transfer	$ 5,900,000
Other Comprehensive Income Loss Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity Arising During Period Net Of Tax	4,500,000	$ (331,000)	$ 0	$ (1,301,000)	$ 0
Stock issued by Federal Home Loan Bank		40,500,000		40,500,000		$ 45,400,000
Non-marketable equity securities		9,600,000		9,600,000		11,600,000
Available for sale securities, realized gain (loss)		$ 8,082,000	$ 21,425,000	$ 33,119,000	$ 54,972,000
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, number of positions | investment		36		36
Unrealized losses related to marketability of securities or issuer's ability to honor redemption obligations		$ 0		$ 0
Investment value deemed to be OTTI				0
Investment securities, aggregate carrying value, pledged as collateral		5,500,000,000		5,500,000,000		$ 4,600,000,000
Debt Securities, Accrued Interest, WriteOff		0		0
Held-to-maturity securities		0		0
Past due securities		$ 0		$ 0
Residential mortgage-backed securities
Schedule of Investments [Line Items]
Investment securities available for sale transferred to held to maturity amortized cost	1,460,000,000
Investment securities available for sale transferred to held to maturity fair value	$ 1,470,000,000
Weighted average contractual maturity term	18 years
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, number of positions | investments		34		34
Corporate Bonds
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, number of positions | investments		2		2
Visa Class B Common Stock
Schedule of Investments [Line Items]
Investment owned (in shares) | shares		354		354
Investment owned, fair value		$ 0		$ 0

Loans and Leases (Loans and Lea

Loans and Leases (Loans and Leases Outstanding) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
PCD loans	$ 373,255	$ 462,882
Total loans and leases	32,516,189	32,791,975
Commercial
Loans and leases, not acquired in a transfer accounted for as debt securities	22,229,345	22,558,060
Commercial | Construction and land development
Loans and leases, not acquired in a transfer accounted for as debt securities	1,247,680	985,424
Commercial | Owner occupied commercial mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	11,625,554	11,165,012
Commercial | Non-owner occupied commercial mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	3,002,928	2,987,689
Commercial | Commercial and industrial and leases
Loans and leases, not acquired in a transfer accounted for as debt securities	5,266,266	5,013,644
Commercial | SBA-PPP
Loans and leases, not acquired in a transfer accounted for as debt securities	1,086,917	2,406,291
Consumer
Loans and leases, not acquired in a transfer accounted for as debt securities	9,913,589	9,771,033
Consumer | Construction and land development
Loans and leases, not acquired in a transfer accounted for as debt securities	391,768	348,123
Consumer | Consumer auto
Loans and leases, not acquired in a transfer accounted for as debt securities	1,350,377	1,255,402
Consumer | Residential mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	5,701,346	5,561,686
Consumer | Revolving mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	1,834,690	2,052,854
Consumer | Consumer other
Loans and leases, not acquired in a transfer accounted for as debt securities	$ 635,408	$ 552,968

Loans and Leases (Narrative) (D

Loans and Leases (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for sale	$ 98,500	$ 124,800
total remaining discount	45,973	64,727
Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Interest receivable	88,100	107,700
PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Remaining discount	32,623	45,254
Non-PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	54,534	50,217
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining	13,350	19,473
Non-PCD Loans | SBA-PPP
Financing Receivable, Credit Quality Indicator [Line Items]
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	(39,372)	41,064
Non-PCD Loans | Other Portfolio
Financing Receivable, Credit Quality Indicator [Line Items]
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	$ (15,162)	$ 9,153

Loans and Leases (Aging Of The

Loans and Leases (Aging Of The Outstanding Loans and Leases By Class) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Past due loans	$ 170,374	$ 245,485
Current loans	32,345,815	32,546,490
Total loans and leases	32,516,189	32,791,975
SBA-PPP
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,100,000
Commercial
Financing Receivable, Past Due [Line Items]
Total loans and leases	22,229,345	22,558,060
Commercial | Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,247,680	985,424
Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total loans and leases	5,266,266	5,013,644
Consumer
Financing Receivable, Past Due [Line Items]
Total loans and leases	9,913,589	9,771,033
Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	391,768	348,123
Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,350,377	1,255,402
Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	5,701,346	5,561,686
Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,834,690	2,052,854
PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	43,718	55,424
Current loans	329,537	407,458
Total loans and leases	373,255	462,882
Non-PCD Loans | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		67,117
Current loans		22,490,943
Total loans and leases		22,558,060
Non-PCD Loans | Commercial | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	1,657	3,086
Current loans	1,246,023	982,338
Total loans and leases	1,247,680	985,424
Non-PCD Loans | Commercial | Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	20,961	25,071
Current loans	11,604,593	11,139,941
Total loans and leases	11,625,554	11,165,012
Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	8,713	18,343
Current loans	2,994,215	2,969,346
Total loans and leases	3,002,928	2,987,689
Non-PCD Loans | Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	23,233	20,617
Current loans	5,243,033	4,993,027
Total loans and leases	5,266,266	5,013,644
Non-PCD Loans | Commercial | Total commercial loans
Financing Receivable, Past Due [Line Items]
Past due loans	54,564	0
Current loans	22,174,781	2,406,291
Total loans and leases	22,229,345	2,406,291
Non-PCD Loans | Commercial | SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
Current loans	1,086,917
Total loans and leases	1,086,917
Non-PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	72,092	122,944
Current loans	9,841,497	9,648,089
Total loans and leases	9,913,589	9,771,033
Non-PCD Loans | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	2,266	1,339
Current loans	389,502	346,784
Total loans and leases	391,768	348,123
Non-PCD Loans | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Past due loans	7,781	9,736
Current loans	1,342,596	1,245,666
Total loans and leases	1,350,377	1,255,402
Non-PCD Loans | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	45,888	83,272
Current loans	5,655,458	5,478,414
Total loans and leases	5,701,346	5,561,686
Non-PCD Loans | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	11,543	22,018
Current loans	1,823,147	2,030,836
Total loans and leases	1,834,690	2,052,854
Non-PCD Loans | Consumer | Consumer other
Financing Receivable, Past Due [Line Items]
Past due loans	4,614	6,579
Current loans	630,794	546,389
Total loans and leases	635,408	552,968
30 to 59 Days past due
Financing Receivable, Past Due [Line Items]
Past due loans	61,934	121,499
30 to 59 Days past due | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	477	932
30 to 59 Days past due | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Total loans and leases	5,345	6,825
30 to 59 Days past due | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	18,417	43,218
30 to 59 Days past due | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	5,587	11,977
30 to 59 Days past due | PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	11,407	18,322
Total loans and leases	11,407	18,322
30 to 59 Days past due | Non-PCD Loans | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		36,615
30 to 59 Days past due | Non-PCD Loans | Commercial | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	233	956
30 to 59 Days past due | Non-PCD Loans | Commercial | Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	7,210	8,757
30 to 59 Days past due | Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	752	12,370
30 to 59 Days past due | Non-PCD Loans | Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	10,309	14,532
30 to 59 Days past due | Non-PCD Loans | Commercial | Total commercial loans
Financing Receivable, Past Due [Line Items]
Past due loans	18,504	0
30 to 59 Days past due | Non-PCD Loans | Commercial | SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
30 to 59 Days past due | Non-PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	32,023	66,562
30 to 59 Days past due | Non-PCD Loans | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	477	932
30 to 59 Days past due | Non-PCD Loans | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Past due loans	5,345	6,825
30 to 59 Days past due | Non-PCD Loans | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	18,417	43,218
30 to 59 Days past due | Non-PCD Loans | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	5,587	11,977
30 to 59 Days past due | Non-PCD Loans | Consumer | Consumer other
Financing Receivable, Past Due [Line Items]
Past due loans	2,197	3,610
60 to 89 Days past due
Financing Receivable, Past Due [Line Items]
Past due loans	27,296	26,043
60 to 89 Days past due | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,719	77
60 to 89 Days past due | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,173	1,835
60 to 89 Days past due | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	6,607	8,364
60 to 89 Days past due | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,443	2,626
60 to 89 Days past due | PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	5,200	6,076
Total loans and leases	5,200	6,076
60 to 89 Days past due | Non-PCD Loans | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		5,601
60 to 89 Days past due | Non-PCD Loans | Commercial | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	0	527
60 to 89 Days past due | Non-PCD Loans | Commercial | Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	5,553	2,232
60 to 89 Days past due | Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	1,245	0
60 to 89 Days past due | Non-PCD Loans | Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	3,234	2,842
60 to 89 Days past due | Non-PCD Loans | Commercial | Total commercial loans
Financing Receivable, Past Due [Line Items]
Past due loans	10,032	0
60 to 89 Days past due | Non-PCD Loans | Commercial | SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
60 to 89 Days past due | Non-PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	12,064	14,366
60 to 89 Days past due | Non-PCD Loans | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	1,719	77
60 to 89 Days past due | Non-PCD Loans | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Past due loans	1,173	1,835
60 to 89 Days past due | Non-PCD Loans | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	6,607	8,364
60 to 89 Days past due | Non-PCD Loans | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	1,443	2,626
60 to 89 Days past due | Non-PCD Loans | Consumer | Consumer other
Financing Receivable, Past Due [Line Items]
Past due loans	1,122	1,464
90 Days or greater
Financing Receivable, Past Due [Line Items]
Past due loans	81,144	97,943
90 Days or greater | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	70	330
90 Days or greater | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,263	1,076
90 Days or greater | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	20,864	31,690
90 Days or greater | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	4,513	7,415
90 Days or greater | PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	27,111	31,026
Total loans and leases	27,111	31,026
90 Days or greater | Non-PCD Loans | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		24,901
90 Days or greater | Non-PCD Loans | Commercial | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	1,424	1,603
90 Days or greater | Non-PCD Loans | Commercial | Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	8,198	14,082
90 Days or greater | Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	6,716	5,973
90 Days or greater | Non-PCD Loans | Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	9,690	3,243
90 Days or greater | Non-PCD Loans | Commercial | Total commercial loans
Financing Receivable, Past Due [Line Items]
Past due loans	26,028	0
90 Days or greater | Non-PCD Loans | Commercial | SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
90 Days or greater | Non-PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	28,005	42,016
90 Days or greater | Non-PCD Loans | Consumer | Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	70	330
90 Days or greater | Non-PCD Loans | Consumer | Consumer auto
Financing Receivable, Past Due [Line Items]
Past due loans	1,263	1,076
90 Days or greater | Non-PCD Loans | Consumer | Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	20,864	31,690
90 Days or greater | Non-PCD Loans | Consumer | Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	4,513	7,415
90 Days or greater | Non-PCD Loans | Consumer | Consumer other
Financing Receivable, Past Due [Line Items]
Past due loans	$ 1,295	$ 1,505

Loans and Leases (Recorded Inve

Loans and Leases (Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 163,775	$ 191,483
Loans and leases greater than 90 days and accruing	5,614	5,862
Non-PCD Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	52,645	43,322
Loans and leases greater than 90 days and accruing	2,015	4,312
Non-PCD Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,457	1,661
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	19,886	23,103
Loans and leases greater than 90 days and accruing	601	3,625
Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	10,613	7,932
Loans and leases greater than 90 days and accruing	0	147
Non-PCD Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	20,689	10,626
Loans and leases greater than 90 days and accruing	1,414	540
Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	66,092	93,222
Loans and leases greater than 90 days and accruing	1,812	1,195
Non-PCD Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	571	652
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	44,463	66,345
Loans and leases greater than 90 days and accruing	779	0
Non-PCD Loans | Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	17,295	22,236
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Consumer | Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	3,287	3,166
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	476	823
Loans and leases greater than 90 days and accruing	1,033	1,195
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	45,038	54,939
Loans and leases greater than 90 days and accruing	$ 1,787	$ 355

Loans and Leases Loans and Leas

Loans and Leases Loans and Leases (Credit Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases	$ 32,516,189	$ 32,791,975
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,156,155	8,459,531
2020	5,598,851	4,217,219
2019	3,648,981	2,787,346
2018	2,106,491	2,053,335
2017	1,611,878	1,647,878
Prior	2,750,737	2,238,335
Revolving	1,349,439	1,147,519
Revolving converted to term loans	6,813	6,897
Total loans and leases	22,229,345	22,558,060
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,381,464	2,679,097
2020	2,252,057	1,444,947
2019	970,938	929,030
2018	572,626	728,918
2017	467,456	536,569
Prior	983,871	951,150
Revolving	2,156,652	2,339,505
Revolving converted to term loans	128,525	161,817
Total loans and leases	9,913,589	9,771,033
Consumer And PCD Portfolio Segments
Financing Receivable, Credit Quality Indicator [Line Items]
2021	7,537,619	11,172,270
2020	7,875,749	5,690,922
2019	4,644,151	3,749,427
2018	2,704,682	2,812,829
2017	2,102,661	2,215,777
Prior	3,981,084	3,458,369
Revolving	3,516,871	3,500,512
Revolving converted to term loans	153,372	191,869
Total loans and leases	32,516,189	32,791,975
Construction and land development | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	373,331	342,658
2020	452,121	341,862
2019	256,647	198,300
2018	100,468	56,118
2017	48,476	23,977
Prior	12,406	11,387
Revolving	4,231	11,122
Revolving converted to term loans	0	0
Total loans and leases	1,247,680	985,424
Construction and land development | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	373,012	342,183
2020	451,926	341,233
2019	256,321	190,429
2018	98,892	50,776
2017	44,343	23,969
Prior	12,396	11,306
Revolving	4,231	10,969
Revolving converted to term loans	0	0
Total loans and leases	1,241,121	970,865
Construction and land development | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	19	246
2020	157	0
2019	0	6,421
2018	134	5,342
2017	63	0
Prior	0	0
Revolving	0	153
Revolving converted to term loans	0	0
Total loans and leases	373	12,162
Construction and land development | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	300	229
2020	38	629
2019	326	1,450
2018	1,442	0
2017	4,070	8
Prior	10	81
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	6,186	2,397
Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	166,026	215,112
2020	177,102	86,127
2019	26,889	24,981
2018	10,258	10,648
2017	5,814	6,093
Prior	3,085	2,637
Revolving	2,594	2,525
Revolving converted to term loans	0	0
Total loans and leases	391,768	348,123
Owner occupied commercial mortgage | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,080,750	3,200,021
2020	3,109,944	2,240,919
2019	2,040,892	1,671,722
2018	1,355,124	1,334,727
2017	1,067,390	1,081,293
Prior	1,838,498	1,521,016
Revolving	132,765	115,109
Revolving converted to term loans	191	205
Total loans and leases	11,625,554	11,165,012
Owner occupied commercial mortgage | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,069,209	3,183,467
2020	3,078,093	2,201,165
2019	1,989,052	1,625,141
2018	1,316,012	1,301,412
2017	1,036,593	1,049,858
Prior	1,778,334	1,454,020
Revolving	122,411	101,556
Revolving converted to term loans	120	133
Total loans and leases	11,389,824	10,916,752
Owner occupied commercial mortgage | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,082	6,274
2020	24,356	20,702
2019	29,358	36,739
2018	28,165	12,387
2017	12,199	17,699
Prior	20,469	25,693
Revolving	4,047	5,115
Revolving converted to term loans	71	72
Total loans and leases	120,747	124,681
Owner occupied commercial mortgage | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	9,459	10,280
2020	7,495	19,052
2019	22,482	9,842
2018	10,947	20,928
2017	18,598	13,736
Prior	39,695	41,303
Revolving	6,307	8,438
Revolving converted to term loans	0	0
Total loans and leases	114,983	123,579
Non-owner occupied commercial mortgage | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	442,059	868,982
2020	782,736	629,426
2019	610,198	401,226
2018	298,910	342,372
2017	294,910	302,018
Prior	540,417	410,223
Revolving	33,698	33,442
Revolving converted to term loans	0	0
Total loans and leases	3,002,928	2,987,689
Non-owner occupied commercial mortgage | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	438,949	865,514
2020	770,507	609,975
2019	587,335	378,136
2018	278,507	331,800
2017	283,867	282,810
Prior	507,411	391,517
Revolving	31,876	32,149
Revolving converted to term loans	0	0
Total loans and leases	2,898,452	2,891,901
Non-owner occupied commercial mortgage | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	495	569
2020	487	905
2019	263	10,794
2018	10,219	1,808
2017	800	5,121
Prior	5,654	3,279
Revolving	500	483
Revolving converted to term loans	0	0
Total loans and leases	18,418	22,959
Non-owner occupied commercial mortgage | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,615	2,899
2020	11,742	18,546
2019	22,600	12,296
2018	10,184	8,764
2017	10,243	14,087
Prior	27,352	15,427
Revolving	1,322	810
Revolving converted to term loans	0	0
Total loans and leases	86,058	72,829
Commercial and industrial | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,248,645	1,641,579
2020	1,178,503	1,005,012
2019	741,244	516,098
2018	351,989	320,118
2017	201,102	240,590
Prior	359,416	295,709
Revolving	1,178,745	987,846
Revolving converted to term loans	6,622	6,692
Total loans and leases	5,266,266	5,013,644
Commercial and industrial | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,238,557	1,620,622
2020	1,162,246	983,852
2019	714,374	504,463
2018	344,220	310,468
2017	193,857	234,735
Prior	350,870	286,996
Revolving	1,087,462	899,978
Revolving converted to term loans	5,136	5,520
Total loans and leases	5,096,722	4,846,634
Commercial and industrial | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,323	3,146
2020	8,279	17,065
2019	22,100	7,265
2018	3,528	5,393
2017	4,070	3,307
Prior	4,324	4,912
Revolving	4,575	9,152
Revolving converted to term loans	206	189
Total loans and leases	49,405	50,429
Commercial and industrial | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	7,765	17,811
2020	7,978	4,095
2019	4,770	4,370
2018	4,241	4,257
2017	3,175	2,548
Prior	4,221	3,801
Revolving	17,392	22,384
Revolving converted to term loans	1,280	983
Total loans and leases	50,822	60,249
Commercial and industrial | Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	1
Revolving	1
Revolving converted to term loans	0
Total loans and leases	2
Commercial and industrial | Commercial | Ungraded
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
Revolving	69,315	56,332
Revolving converted to term loans	0	0
Total loans and leases	69,315	56,332
Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,592,476	1,885,273
2020	1,654,367	987,802
2019	696,566	671,657
2018	415,787	605,545
2017	396,391	476,855
Prior	925,580	909,361
Revolving	20,179	25,193
Revolving converted to term loans	0	0
Total loans and leases	5,701,346	5,561,686
Revolving mortgage | Consumer
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
Revolving	1,706,165	1,891,037
Revolving converted to term loans	128,525	161,817
Total loans and leases	1,834,690	2,052,854
Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	505,766	524,393
2020	386,788	343,683
2019	231,137	221,383
2018	141,124	105,530
2017	60,240	50,627
Prior	25,322	9,786
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,350,377	1,255,402
Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	117,196	54,319
2020	33,800	27,335
2019	16,346	11,009
2018	5,457	7,195
2017	5,011	2,994
Prior	29,884	29,366
Revolving	427,714	420,750
Revolving converted to term loans	0	0
Total loans and leases	635,408	552,968
SBA-PPP
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases	1,100,000
SBA-PPP | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,011,370	2,406,291
2020	75,547	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,086,917	2,406,291
PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	33,642
2020	24,841	28,756
2019	24,232	33,051
2018	25,565	30,576
2017	23,327	31,330
Prior	246,476	268,884
Revolving	10,780	13,488
Revolving converted to term loans	18,034	23,155
Total loans and leases	373,255	462,882
Current | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	165,993	215,112
2020	175,007	85,707
2019	26,889	24,860
2018	10,258	10,269
2017	5,745	6,093
Prior	3,016	2,218
Revolving	2,594	2,525
Revolving converted to term loans	0	0
Total loans and leases	389,502	346,784
Current | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,591,381	1,882,683
2020	1,651,853	978,298
2019	690,779	655,798
2018	410,446	596,309
2017	390,940	461,719
Prior	900,129	878,634
Revolving	19,930	24,973
Revolving converted to term loans	0	0
Total loans and leases	5,655,458	5,478,414
Current | Revolving mortgage | Consumer
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
Revolving	1,700,947	1,879,968
Revolving converted to term loans	122,200	150,868
Total loans and leases	1,823,147	2,030,836
Current | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	504,537	521,719
2020	384,849	340,594
2019	229,033	219,597
2018	139,764	104,280
2017	59,487	49,872
Prior	24,926	9,604
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,342,596	1,245,666
Current | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	117,047	53,842
2020	33,700	27,117
2019	16,222	10,911
2018	5,431	7,159
2017	5,011	2,980
Prior	29,871	29,336
Revolving	423,512	415,044
Revolving converted to term loans	0	0
Total loans and leases	630,794	546,389
Current | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	31,475
2020	23,091	25,425
2019	23,792	27,183
2018	21,034	27,955
2017	20,864	28,995
Prior	213,681	232,186
Revolving	10,622	13,212
Revolving converted to term loans	16,453	21,027
Total loans and leases	329,537	407,458
30 to 59 Days past due | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	33	0
2020	416	420
2019	0	121
2018	0	370
2017	0	0
Prior	28	21
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	477	932
30 to 59 Days past due | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	252	2,278
2020	1,506	4,573
2019	4,728	11,463
2018	3,066	3,772
2017	1,486	8,613
Prior	7,379	12,299
Revolving	0	220
Revolving converted to term loans	0	0
Total loans and leases	18,417	43,218
30 to 59 Days past due | Revolving mortgage | Consumer
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
Revolving	2,939	8,241
Revolving converted to term loans	2,648	3,736
Total loans and leases	5,587	11,977
30 to 59 Days past due | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	889	2,175
2020	1,262	1,873
2019	1,450	1,257
2018	877	842
2017	586	544
Prior	281	134
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	5,345	6,825
30 to 59 Days past due | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	89	322
2020	63	114
2019	18	77
2018	24	18
2017	0	11
Prior	13	7
Revolving	1,990	3,061
Revolving converted to term loans	0	0
Total loans and leases	2,197	3,610
30 to 59 Days past due | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	999
2020	846	925
2019	61	801
2018	785	718
2017	1,393	1,341
Prior	7,777	12,637
Revolving	113	156
Revolving converted to term loans	432	745
Total loans and leases	11,407	18,322
60 to 89 Days past due | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	1,650	0
2019	0	0
2018	0	9
2017	69	0
Prior	0	68
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,719	77
60 to 89 Days past due | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	788	30
2020	295	100
2019	0	1,246
2018	764	1,449
2017	881	834
Prior	3,879	4,705
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	6,607	8,364
60 to 89 Days past due | Revolving mortgage | Consumer
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
Revolving	378	527
Revolving converted to term loans	1,065	2,099
Total loans and leases	1,443	2,626
60 to 89 Days past due | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	200	329
2020	330	689
2019	234	312
2018	255	351
2017	84	109
Prior	70	45
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,173	1,835
60 to 89 Days past due | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	11	102
2020	25	20
2019	89	13
2018	1	18
2017	0	3
Prior	0	23
Revolving	996	1,285
Revolving converted to term loans	0	0
Total loans and leases	1,122	1,464
60 to 89 Days past due | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	447
2020	98	81
2019	149	312
2018	48	695
2017	0	97
Prior	4,699	4,098
Revolving	29	9
Revolving converted to term loans	177	337
Total loans and leases	5,200	6,076
90 Days or greater | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	29	0
2019	0	0
2018	0	0
2017	0	0
Prior	41	330
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	70	330
90 Days or greater | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	55	282
2020	713	4,831
2019	1,059	3,150
2018	1,511	4,015
2017	3,084	5,689
Prior	14,193	13,723
Revolving	249	0
Revolving converted to term loans	0	0
Total loans and leases	20,864	31,690
90 Days or greater | Revolving mortgage | Consumer
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
Revolving	1,901	2,301
Revolving converted to term loans	2,612	5,114
Total loans and leases	4,513	7,415
90 Days or greater | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	140	170
2020	347	527
2019	420	217
2018	228	57
2017	83	102
Prior	45	3
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,263	1,076
90 Days or greater | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	49	53
2020	12	84
2019	17	8
2018	1	0
2017	0	0
Prior	0	0
Revolving	1,216	1,360
Revolving converted to term loans	0	0
Total loans and leases	1,295	1,505
90 Days or greater | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	721
2020	806	2,325
2019	230	4,755
2018	3,698	1,208
2017	1,070	897
Prior	20,319	19,963
Revolving	16	111
Revolving converted to term loans	972	1,046
Total loans and leases	$ 27,111	$ 31,026

Loans and Leases (Composition o

Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	$ 170,374	$ 245,485
Current loans	32,345,815	32,546,490
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	22,229,345	22,558,060
Commercial | Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	5,266,266	5,013,644
Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,247,680	985,424
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	9,913,589	9,771,033
Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	391,768	348,123
Non-PCD Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		67,117
Current loans		22,490,943
Non-PCD Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	20,961	25,071
Current loans	11,604,593	11,139,941
Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	8,713	18,343
Current loans	2,994,215	2,969,346
Non-PCD Loans | Commercial | Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	23,233	20,617
Current loans	5,243,033	4,993,027
Non-PCD Loans | Commercial | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	54,564	0
Current loans	22,174,781	2,406,291
Non-PCD Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,657	3,086
Current loans	1,246,023	982,338
Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	72,092	122,944
Current loans	9,841,497	9,648,089
Non-PCD Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,266	1,339
Current loans	389,502	346,784
Non-PCD Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	4,614	6,579
Current loans	630,794	546,389
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	43,718	55,424
Current loans	329,537	407,458
30 to 59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	61,934	121,499
30 to 59 Days past due | Non-PCD Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		36,615
30 to 59 Days past due | Non-PCD Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	7,210	8,757
30 to 59 Days past due | Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	752	12,370
30 to 59 Days past due | Non-PCD Loans | Commercial | Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	10,309	14,532
30 to 59 Days past due | Non-PCD Loans | Commercial | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	18,504	0
30 to 59 Days past due | Non-PCD Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	233	956
30 to 59 Days past due | Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	32,023	66,562
30 to 59 Days past due | Non-PCD Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	477	932
30 to 59 Days past due | Non-PCD Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,197	3,610
30 to 59 Days past due | PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	11,407	18,322
60 to 89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	27,296	26,043
60 to 89 Days past due | Non-PCD Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		5,601
60 to 89 Days past due | Non-PCD Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	5,553	2,232
60 to 89 Days past due | Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,245	0
60 to 89 Days past due | Non-PCD Loans | Commercial | Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,234	2,842
60 to 89 Days past due | Non-PCD Loans | Commercial | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	10,032	0
60 to 89 Days past due | Non-PCD Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	0	527
60 to 89 Days past due | Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	12,064	14,366
60 to 89 Days past due | Non-PCD Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,719	77
60 to 89 Days past due | Non-PCD Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,122	1,464
60 to 89 Days past due | PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	5,200	6,076
90 Days or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	81,144	97,943
90 Days or greater | Non-PCD Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		24,901
90 Days or greater | Non-PCD Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	8,198	14,082
90 Days or greater | Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	6,716	5,973
90 Days or greater | Non-PCD Loans | Commercial | Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	9,690	3,243
90 Days or greater | Non-PCD Loans | Commercial | Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	26,028	0
90 Days or greater | Non-PCD Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,424	1,603
90 Days or greater | Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	28,005	42,016
90 Days or greater | Non-PCD Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	70	330
90 Days or greater | Non-PCD Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,295	1,505
90 Days or greater | PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	$ 27,111	$ 31,026

Loans and Leases - Schedule of

Loans and Leases - Schedule of Loans as Collateral (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Advances	$ 645,663	$ 655,175
Federal Home Loan Bank of Atlanta
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lendable collateral value of pledged non-PCD loans-FHLB	9,171,610	8,637,844
Less: Advances	645,663	652,675
Available borrowing capacity	8,525,947	7,985,169
Loans pledged as collateral	12,646,208	12,157,153
Federal Reserve Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lendable collateral value of pledged non-PCD loans-FRB	3,795,878	3,321,762
Less: Advances	0	0
Available borrowing capacity	3,795,878	3,321,762
Loans pledged as collateral	$ 4,610,291	$ 4,104,866

Allowance for Credit Losses (Su

Allowance for Credit Losses (Summary of Activity In Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Forecast period (years)			2 years
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 189,094	$ 222,450	$ 224,314	$ 225,141
Provision (credit)	(1,120)	4,042	(31,697)	52,949
Initial allowance on PCD loans				1,193
Charge-offs	(11,073)	(8,932)	(27,164)	(35,257)
Recoveries	6,293	6,376	17,741	17,834
Ending balance	183,194	223,936	183,194	223,936
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(37,924)
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				187,217
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	76,082	76,177	80,842	142,369
Provision (credit)	975	4,793	332	32,854
Initial allowance on PCD loans				0
Charge-offs	(5,967)	(3,328)	(12,342)	(12,712)
Recoveries	1,594	2,338	3,852	5,023
Ending balance	72,684	79,980	72,684	79,980
Commercial | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(87,554)
Commercial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				54,815
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	94,272	119,345	119,485	75,236
Provision (credit)	(223)	1,874	(23,208)	25,066
Initial allowance on PCD loans				0
Charge-offs	(4,307)	(5,109)	(12,804)	(19,535)
Recoveries	2,330	2,719	8,599	7,433
Ending balance	92,072	118,829	92,072	118,829
Consumer | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				30,629
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				105,865
Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,103	13,685	12,814	1,055
Provision (credit)	369	286	(1,342)	4,031
Ending balance	11,472	13,971	11,472	13,971
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	8,885
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,103	13,685	12,814	9,940
PCD Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	18,740	26,928	23,987	7,536
Provision (credit)	(1,872)	(2,625)	(8,821)	(4,971)
Initial allowance on PCD loans				1,193
Charge-offs	(799)	(495)	(2,018)	(3,010)
Recoveries	2,369	1,319	5,290	5,378
Ending balance	$ 18,438	$ 25,127	$ 18,438	25,127
PCD Loans | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				19,001
PCD Loans | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 26,537

Allowance for Credit Losses (Co

Allowance for Credit Losses (Collateral Dependent Loans) (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold balance for collateral-dependent loans to be individually reviewed for impairment	$ 500,000
Collateral-Dependent Loans	51,403,000	$ 58,825,000
Net Realizable Value of Collateral	$ 75,581,000	$ 81,272,000
Collateral Coverage	147.00%	138.20%
Allowance for Credit Losses	$ 1,433,000	$ 131,000
Collateral-dependent nonaccrual loans with no allowance	45,500,000	57,500,000
Non-PCD Loans | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	21,826,000	16,772,000
Net Realizable Value of Collateral	$ 28,168,000	$ 23,625,000
Collateral Coverage	129.10%	140.90%
Allowance for Credit Losses	$ 1,433,000	$ 0
Non-PCD Loans | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	11,423,000
Net Realizable Value of Collateral	$ 14,625,000
Collateral Coverage	128.00%
Allowance for Credit Losses	$ 0
PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	18,154,000	19,042,000
Net Realizable Value of Collateral	$ 32,788,000	$ 27,872,000
Collateral Coverage	180.60%	146.40%
Allowance for Credit Losses	$ 0	$ 0
Construction and land development | Non-PCD Loans | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	1,424,000	1,424,000
Net Realizable Value of Collateral	$ 1,964,000	$ 1,795,000
Collateral Coverage	137.90%	126.10%
Allowance for Credit Losses	$ 0	$ 0
Owner occupied commercial mortgage | Non-PCD Loans | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	7,411,000	9,792,000
Net Realizable Value of Collateral	$ 8,367,000	$ 14,253,000
Collateral Coverage	112.90%	145.60%
Allowance for Credit Losses	$ 0	$ 0
Non-owner occupied commercial mortgage | Non-PCD Loans | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	8,204,000	5,556,000
Net Realizable Value of Collateral	$ 11,307,000	$ 7,577,000
Collateral Coverage	137.80%	136.40%
Allowance for Credit Losses	$ 1,203,000	$ 0
Commercial and industrial | Non-PCD Loans | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	4,787,000
Net Realizable Value of Collateral	$ 6,530,000
Collateral Coverage	136.40%
Allowance for Credit Losses	$ 230,000
Residential mortgage | Non-PCD Loans | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	11,423,000	23,011,000
Net Realizable Value of Collateral	$ 14,625,000	$ 29,775,000
Collateral Coverage	128.00%	129.40%
Allowance for Credit Losses	$ 0	$ 131,000
Revolving mortgage | Non-PCD Loans | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependent Loans	0
Net Realizable Value of Collateral	$ 0
Collateral Coverage	0.00%
Allowance for Credit Losses	$ 0

Allowance for Credit Losses (Tr

Allowance for Credit Losses (Troubled Debt Restructuring) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	$ 212,975	$ 208,180
Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	152,017	157,364
Nonaccruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	60,958	50,816
Non-PCD Loans | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	104,881	101,739
Non-PCD Loans | Commercial | Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	379	632
Non-PCD Loans | Commercial | Owner occupied commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	56,916	48,463
Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	23,785	19,985
Non-PCD Loans | Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	23,801	32,659
Non-PCD Loans | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	66,522	81,478
Non-PCD Loans | Consumer | Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	2,662	1,582
Non-PCD Loans | Consumer | Consumer auto
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	2,524	2,714
Non-PCD Loans | Consumer | Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	37,043	48,838
Non-PCD Loans | Consumer | Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	23,458	27,252
Non-PCD Loans | Consumer | Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	835	1,092
Non-PCD Loans | Accruing | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	79,129	85,619
Non-PCD Loans | Accruing | Commercial | Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	346	578
Non-PCD Loans | Accruing | Commercial | Owner occupied commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	46,255	37,574
Non-PCD Loans | Accruing | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	20,022	18,336
Non-PCD Loans | Accruing | Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	12,506	29,131
Non-PCD Loans | Accruing | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	43,681	54,128
Non-PCD Loans | Accruing | Consumer | Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	2,380	1,573
Non-PCD Loans | Accruing | Consumer | Consumer auto
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	1,888	2,018
Non-PCD Loans | Accruing | Consumer | Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	22,106	29,458
Non-PCD Loans | Accruing | Consumer | Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	16,533	20,124
Non-PCD Loans | Accruing | Consumer | Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	774	955
Non-PCD Loans | Nonaccruing | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	25,752	16,120
Non-PCD Loans | Nonaccruing | Commercial | Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	33	54
Non-PCD Loans | Nonaccruing | Commercial | Owner occupied commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	10,661	10,889
Non-PCD Loans | Nonaccruing | Commercial | Non-owner occupied commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	3,763	1,649
Non-PCD Loans | Nonaccruing | Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	11,295	3,528
Non-PCD Loans | Nonaccruing | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	22,841	27,350
Non-PCD Loans | Nonaccruing | Consumer | Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	282	9
Non-PCD Loans | Nonaccruing | Consumer | Consumer auto
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	636	696
Non-PCD Loans | Nonaccruing | Consumer | Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	14,937	19,380
Non-PCD Loans | Nonaccruing | Consumer | Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	6,925	7,128
Non-PCD Loans | Nonaccruing | Consumer | Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	61	137
PCD Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	41,572	24,963
PCD Loans | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	29,207	17,617
PCD Loans | Nonaccruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	$ 12,365	$ 7,346

Allowance for Credit Losses (No

Allowance for Credit Losses (Note Restructurings During Period) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)loans	Sep. 30, 2020USD ($)loans	Sep. 30, 2021USD ($)loans	Sep. 30, 2020USD ($)loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	116	145	387	462
Recorded investment at period end | $	$ 21,919	$ 25,078	$ 67,710	$ 76,497
Interest only period provided
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	7	6	17	23
Recorded investment at period end | $	$ 9,639	$ 5,703	$ 19,728	$ 24,847
Loan term extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	41	29	112	62
Recorded investment at period end | $	$ 6,371	$ 2,380	$ 14,500	$ 5,885
Below market interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	47	55	148	212
Recorded investment at period end | $	$ 3,126	$ 15,341	$ 21,004	$ 38,740
Discharged from bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	21	55	110	165
Recorded investment at period end | $	$ 2,783	$ 1,654	$ 12,478	$ 7,025

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Real Estate Properties [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 19,600		$ 29,400
Gains (losses) on sales of OREO	5,200	$ 1,000
Other Real Estate [Roll Forward]
Beginning balance	50,890	46,591
Additions	16,454	18,428
Sales	(24,311)	(18,645)
Write-downs/losses	(2,384)	(3,398)
Ending balance	40,649	52,789
Mortgage
Other Real Estate [Roll Forward]
Beginning balance	5,800
Ending balance	$ 3,000
2019 Acquisitions
Other Real Estate [Roll Forward]
Additions		$ 9,813

Mortgage Servicing Rights (MSR

Mortgage Servicing Rights (MSR Carrying Value) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning balance	$ 21,985,000	$ 18,664,000	$ 18,426,000	$ 22,963,000
Servicing rights originated	1,891,000	1,994,000	8,436,000	5,673,000
Amortization	(2,180,000)	(2,208,000)	(6,505,000)	(6,150,000)
Valuation allowance (increase) decrease	0	(305,000)	1,339,000	(4,341,000)
Ending balance	$ 21,696,000	$ 18,145,000	$ 21,696,000	$ 18,145,000

Mortgage Servicing Rights (Valu

Mortgage Servicing Rights (Valuation allowance) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Beginning balance	$ 3,026,000	$ 4,258,000	$ 4,365,000	$ 222,000
Valuation allowance increase	0	305,000	(1,339,000)	4,341,000
Ending balance	$ 3,026,000	$ 4,563,000	$ 3,026,000	$ 4,563,000

Mortgage Servicing Rights (Econ

Mortgage Servicing Rights (Economic Assumptions) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Servicing Asset Key Economic Assumptions [Line Items]
Weighted average constant prepayment rate	17.32%	20.62%
Weighted average cost to service a loan	$ 87.58	$ 87.58
Fixed Rate Residential Mortgage
Servicing Asset Key Economic Assumptions [Line Items]
Discount rate	8.49%	7.92%
Discount rate, basis spread on Treasury rate	700.00%
All Loans and Leases, Excluding Conventional Fixed Loans
Servicing Asset Key Economic Assumptions [Line Items]
Discount rate	9.49%	8.92%
Discount rate, basis spread on Treasury rate	800.00%

Mortgage Servicing Rights (Narr

Mortgage Servicing Rights (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Mortgage Servicing Rights [Abstract]
Residential Mortgage Loans Serviced	$ 3,300,000,000		$ 3,300,000,000		$ 3,300,000,000
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	2,100,000	$ 2,100,000	6,400,000	$ 6,400,000
Valuation allowance increase	$ 0	$ 305,000	$ (1,339,000)	$ 4,341,000

Repurchase Agreements (Details)

Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 685,900
Securities sold under customer repurchase agreements	663,575	$ 641,487
Available-for-sale Securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral		689,300
Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under customer repurchase agreements	663,600	641,500
Overnight and continuous | US Government Agencies Debt Securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under customer repurchase agreements	571,600	432,800
Overnight and continuous | Commercial Mortgage Backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under customer repurchase agreements	$ 92,000	$ 208,700

FDIC Shared-Loss Payable (Narra

FDIC Shared-Loss Payable (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
FDIC Shared-Loss Receivable [Abstract]
FDIC Shared-Loss Payable Payment	$ 16,103

FDIC Shared-Loss Payable FDIC S

FDIC Shared-Loss Payable FDIC Shared-Loss Payable (Changes in Payable to FDIC) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
FDIC Shared-Payable [Abstract]
FDIC shared-loss payable	$ 15,601
Accretion	502
Payment made to the FDIC to settle shared-loss agreement	(16,103)
FDIC shared-loss payable	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), before Tax	$ (41,736)		$ (41,736)		$ 15,926
Deferred tax expense (benefit)	(9,599)		(9,599)		3,663
Accumulated other comprehensive income (loss), net of tax	(32,137)		(32,137)		12,263
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,340	$ 11,622	11,157	$ 27,704
Unrealized Losses on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss), before Tax	25,986		25,986		102,278
Deferred tax expense (benefit)	5,977		5,977		23,524
Accumulated other comprehensive income (loss), net of tax	20,009		20,009		78,754
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	6,224	16,497	25,502	42,328
Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Accumulated Other Comprehensive Income (Loss), before Tax	3,709		3,709		5,399
Deferred tax expense (benefit)	853		853		1,242
Accumulated other comprehensive income (loss), net of tax	2,856		2,856		4,157
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	331	0	1,301	0
Funded Status of Defined Benefit Plan
Accumulated Other Comprehensive Income (Loss), before Tax	(71,431)		(71,431)		(91,751)
Deferred tax expense (benefit)	(16,429)		(16,429)		(21,103)
Accumulated other comprehensive income (loss), net of tax	(55,002)		(55,002)		$ (70,648)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(5,215)	(4,875)	(15,646)	(14,624)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	$ 6,773	$ 6,332	$ 20,320	$ 18,994

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Components of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss	$ (1,340)	$ (11,622)	$ (11,157)	$ (27,704)
Net current period other comprehensive (loss) income	(10,017)	(4,092)	(44,400)	112,967
Unrealized Losses on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	34,910		78,754
Net unrealized losses arising during period	(8,677)	7,530	(33,243)	140,671
Amounts reclassified from accumulated other comprehensive loss	(6,224)	(16,497)	(25,502)	(42,328)
Net current period other comprehensive (loss) income	(14,901)	(8,967)	(58,745)	98,343
Ending balance	20,009	104,135	20,009	104,135
Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	3,187		4,157
Net unrealized losses arising during period	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	(331)	0	(1,301)	0
Net current period other comprehensive (loss) income	(331)	0	(1,301)	0
Ending balance	2,856	0	2,856	0
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(60,217)		(70,648)
Net unrealized losses arising during period	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	5,215	4,875	15,646	14,624
Net current period other comprehensive (loss) income	5,215	4,875	15,646	14,624
Ending balance	(55,002)	(117,891)	(55,002)	(117,891)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(22,120)		12,263
Net unrealized losses arising during period	(8,677)	7,530	(33,243)	140,671
Amounts reclassified from accumulated other comprehensive loss	(1,340)	(11,622)	(11,157)	(27,704)
Net current period other comprehensive (loss) income	(10,017)	(4,092)	(44,400)	112,967
Ending balance	$ (32,137)	(13,756)	$ (32,137)	(13,756)
Previously Reported | Unrealized Losses on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		113,102		5,792
Previously Reported | Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		0		0
Previously Reported | Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(122,766)		(132,515)
Previously Reported | Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ (9,664)		$ (126,723)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	$ 8,082	$ 21,425	$ 33,119	$ 54,972
Amounts reclassified from accumulated other comprehensive income, net of tax	(1,340)	(11,622)	(11,157)	(27,704)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	1,558	1,457	4,674	4,370
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	(5,215)	(4,875)	(15,646)	(14,624)
Tax effect	1,858	4,928	7,617	12,644
Unrealized Losses on Investment Securities Available for Sale
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	8,082	21,425	33,119	54,972
Amounts reclassified from accumulated other comprehensive income, net of tax	(6,224)	(16,497)	(25,502)	(42,328)
Tax effect	1,858	4,928	7,617	12,644
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	6,224	16,497	25,502	42,328
Defined Benefit Pension Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before taxes	(6,773)	(6,332)	(20,320)	(18,994)
Amounts reclassified from accumulated other comprehensive income, net of tax	5,215	4,875	15,646	14,624
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	1,558	1,457	4,674	4,370
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	(5,215)	(4,875)	(15,646)	(14,624)
Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive income, net of tax	(331)	$ 0	(1,301)	$ 0
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Before Tax	430		1,690
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Tax	(99)		(389)
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Net Of Tax	$ 331		$ 1,301

Estimated Fair Values (Estimate

Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 337,450	$ 362,048
Debt Securities, Available-for-sale	7,371,129	7,014,243
Investment securities held to maturity at cost	3,381,078	2,816,982
Investment in marketable equity securities	123,147	91,680
Loans held for sale	98,500	124,800
Loans and Leases Receivable, Net Amount	32,332,995	32,567,661
Income earned not collected	132,911	145,694
Stock issued by Federal Home Loan Bank	40,500	45,400
Deposits	50,065,762	43,431,609
Securities sold under customer repurchase agreements	663,575	641,487
FDIC shared-loss payable	0	15,601
Subordinated Debt	497,427	504,518
Other Borrowings	76,139	88,470
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Federal Home Loan Bank Advances	645,663	655,175
Cash and due from banks	337,450	362,048
Overnight investments	9,875,063	4,347,336
Debt Securities, Available-for-sale	7,371,129	7,014,243
Investment securities held to maturity at cost	3,381,078	2,816,982
Investment in marketable equity securities	123,147	91,680
Loans held for sale	98,451	124,837
Loans and Leases Receivable, Net Amount	32,332,995	32,567,661
Income earned not collected	132,911	145,694
Stock issued by Federal Home Loan Bank	40,450	45,392
Mortgage servicing rights	22,263	19,628
Deposits	47,492,194	40,542,596
Time deposits	2,573,568	2,889,013
Securities sold under customer repurchase agreements	663,575	641,487
FDIC shared-loss payable	0	15,601
Accrued interest payable	6,560	9,414
Subordinated Debt	497,427	504,518
Other Borrowings	76,139	88,470
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Federal Home Loan Bank Advances	659,625	677,579
Cash and due from banks	337,450	362,048
Overnight investments	9,875,063	4,347,336
Debt Securities, Available-for-sale	7,371,129	7,014,243
Investment securities held to maturity at cost	3,353,078	2,838,499
Investment in marketable equity securities	123,147	91,680
Loans held for sale	98,451	124,837
Loans and Leases Receivable, Net Amount	32,349,172	33,298,166
Income earned not collected	132,911	145,694
Stock issued by Federal Home Loan Bank	40,450	45,392
Mortgage servicing rights	22,624	20,283
Deposits	47,492,194	40,542,596
Time deposits	2,573,131	2,905,577
Securities sold under customer repurchase agreements	663,575	641,487
FDIC shared-loss payable	0	15,843
Accrued interest payable	6,560	9,414
Subordinated Debt	520,871	525,610
Other Borrowings	$ 76,643	$ 89,263

Estimated Fair Values (Assets A

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	$ 7,371,129	$ 7,014,243
Investment in marketable equity securities	123,147	91,680
Loans held for sale	98,451	124,837
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	7,371,129	7,014,243
Loans held for sale	98,451	124,837
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Loans held for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	7,062,994	6,697,619
Loans held for sale	98,451	124,837
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	308,135	316,624
Loans held for sale	0	0
Fair Value, Measurements, Recurring | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		499,933
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		499,933
Fair Value, Measurements, Recurring | U.S. Treasury | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0
Fair Value, Measurements, Recurring | Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	853,728	701,391
Fair Value, Measurements, Recurring | Agency Securities | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Agency Securities | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	853,728	701,391
Fair Value, Measurements, Recurring | Agency Securities | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Commercial Mortgage Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,090,652	771,537
Fair Value, Measurements, Recurring | Commercial Mortgage Backed Securities | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Commercial Mortgage Backed Securities | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,090,652	771,537
Fair Value, Measurements, Recurring | Commercial Mortgage Backed Securities | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Residential Mortgage Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	4,801,646	4,438,103
Fair Value, Measurements, Recurring | Residential Mortgage Backed Securities | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Residential Mortgage Backed Securities | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	4,801,646	4,438,103
Fair Value, Measurements, Recurring | Residential Mortgage Backed Securities | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in marketable equity securities	123,147	91,680
Fair Value, Measurements, Recurring | Equity Securities | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in marketable equity securities	52,991	32,855
Fair Value, Measurements, Recurring | Equity Securities | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in marketable equity securities	70,156	58,825
Fair Value, Measurements, Recurring | Equity Securities | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in marketable equity securities	0	0
Fair Value, Measurements, Recurring | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	625,103	603,279
Fair Value, Measurements, Recurring | Corporate Bonds | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Measurements, Recurring | Corporate Bonds | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	316,968	286,655
Fair Value, Measurements, Recurring | Corporate Bonds | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	$ 308,135	$ 316,624

Estimated Fair Values (Assets_2

Estimated Fair Values (Assets and Liabilities Carried at Fair Value on a Recurring Basis Significant Unobservable Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	$ 0	$ 0		$ 1,800
Corporate Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	325,448	169,977	$ 316,624	69,685
Purchases	23,878	78,000	30,878	178,595
Unrealized net (losses) gains included in other comprehensive income	436	2,818	3,927	901
Amounts included in net income	2,504	(81)	2,687	(249)
Transfers in	0	0	0	1,782
Sales / Calls	44,131	0	45,981	0
Ending balance	$ 308,135	$ 250,714	$ 308,135	$ 250,714

Estimated Fair Values (Assets_3

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate remeasured during current year	$ 40,649	$ 50,890	$ 52,789	$ 46,591
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	12,185	11,779
Other real estate remeasured during current year	32,391	40,115
Mortgage servicing rights	20,210	16,966
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate remeasured during current year	0	0
Mortgage servicing rights	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate remeasured during current year	0	0
Mortgage servicing rights	0	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	12,185	11,779
Other real estate remeasured during current year	32,391	40,115
Mortgage servicing rights	$ 20,210	$ 16,966

Estimated Fair Values (Fair Val

Estimated Fair Values (Fair Value Option) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) from fair value changes on originated loans held for sale	$ (600)	$ 600	$ (2,900)	$ 4,200
Loans Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of originated loans held for sale	98,451		98,451		$ 124,837
Aggregate unpaid principle balance of originated loans held for sale	95,396		95,396		118,902
Difference between fair value and aggregate unpaid principle balance of originated loans held for sale	$ 3,055		$ 3,055		$ 5,935

Estimated Fair Values (Narrativ

Estimated Fair Values (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers from level 2 to level 3	$ 0	$ 0		$ 1,800,000
Gains (Losses) from fair value changes on originated loans held for sale	(600,000)	$ 600,000	$ (2,900,000)	$ 4,200,000
Originated loans held for sale, 90 days or more past due	0		0		$ 0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability measured at fair value on nonrecurring basis	$ 0		$ 0		$ 0
Discount Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent Loans, Measurement Input	0.05		0.05
OREO, measurement input	0.06		0.06
Discount Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent Loans, Measurement Input	0.10		0.10
OREO, measurement input	0.15		0.15
Discount Rate | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent Loans, Measurement Input	0.08		0.08
OREO, measurement input	0.08		0.08

Employee Benefit Plans (Compone

Employee Benefit Plans (Components Of Pension Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Retirement Benefits, Description [Abstract]
Service cost	$ 3,838	$ 3,570	$ 11,514	$ 10,709
Interest cost	7,466	8,549	22,398	25,648
Expected return on assets	(19,607)	(16,423)	(58,823)	(49,267)
Amortization of net actuarial loss	6,773	6,332	20,320	18,994
Total pension expense	$ (1,530)	$ 2,028	$ (4,591)	$ 6,084

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Retirement Benefits, Description [Abstract]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 100

Leases (Operating and Finance L

Leases (Operating and Finance Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Asset, operating	$ 62,214	$ 68,048
Asset, finance	4,852	6,478
Total leased assets	67,066	74,526
Present value of lease liabilities	63,025	68,343
Present value of lease liabilities	4,720	6,308
Total lease liabilities	$ 67,745	$ 74,651

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Standby Letters of Credit
Guarantor Obligations [Line Items]
Standby letters of credit	$ 116,302	$ 129,819
Qualified Affordable Housing Project investments	162,300	163,900
Commitments to Extend Credit
Guarantor Obligations [Line Items]
Unused Commitments to Extend Credit	12,775,929	12,098,417
Qualified Affordable Housing Project, Unfunded Commitments	$ 49,800	$ 53,700