First Citizens BancShares (FCNCO) 10-Q3 Nov 202020 Q3 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2020	Oct. 30, 2020
Entity Central Index Key	0000798941
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 352,419	$ 376,719
Overnight investments	3,137,945	1,107,844
Investment in marketable equity securities	93,074	82,333
Debt Securities, Available-for-sale	9,019,788	7,059,674
Investment securities held to maturity at cost	747,732	30,996
Loans held for sale	120,305	67,869
Loans and leases	32,845,144	28,881,496
Allowance for loan and lease losses	(223,936)	(225,141)
Total loan and leases	32,621,208	28,656,355
Premises and equipment	1,255,250	1,244,396
Other real estate owned	52,789	46,591
Income earned not collected	151,737	123,154
Goodwill recorded for Community Financial	350,298	349,398
Other intangible assets	54,170	68,276
Other assets	710,158	610,891
Total assets	48,666,873	39,824,496
Deposits [Abstract]
Noninterest-bearing deposits	18,234,561	12,926,796
Interest-bearing deposits	24,016,045	21,504,440
Total deposits	42,250,606	34,431,236
Securities sold under customer repurchase agreements	693,889	442,956
Federal Home Loan Bank borrowings	655,179	572,185
Subordinated Debt	504,381	163,412
Other Borrowings	92,456	148,318
FDIC shared-loss payable	15,313	112,395
Other liabilities	380,635	367,810
Total liabilities	44,592,459	36,238,312
Shareholders' Equity
Preferred stock	339,937	0
Surplus	0	44,081
Retained earnings	3,738,417	3,658,197
Accumulated other comprehensive loss	(13,756)	(126,723)
Total shareholders' equity	4,074,414	3,586,184
Total liabilities and shareholders' equity	48,666,873	39,824,496
Class A Common Stock
Shareholders' Equity
Common stock	8,811	9,624
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, 2020	Dec. 31, 2019
Investment in marketable equity securities at cost	$ 100,408	$ 59,262
Investment securities available for sale at cost	8,884,548	7,052,152
Investment securities held to maturity at fair value	$ 761,252	$ 30,996
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	0
Preferred stock, shares outstanding	345,000	0
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	9,624,310
Common stock, shares outstanding	8,811,220	9,624,310
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
Consolidated Statements of Income - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income
Loans and leases	$ 336,382	$ 315,012	$ 988,029	$ 909,167
Investment securities interest and dividend income	37,195	40,155	113,293	119,976
Overnight investments	757	7,151	5,828	20,820
Total interest income	374,334	362,318	1,107,150	1,049,963
Interest expense
Deposits	13,468	21,737	55,578	53,821
Securities sold under customer repurchase agreements	395	542	1,236	1,516
Federal Home Loan Bank borrowings	2,156	1,316	7,612	4,187
Subordinated debt	4,351	1,774	11,783	5,398
Interest Expense, Other	305	524	1,488	796
Total interest expense	20,675	25,893	77,697	65,718
Net interest income	353,659	336,425	1,029,453	984,245
Provision (credit) for loan and lease losses	4,042	6,766	52,949	23,714
Net interest income after provision for loan and lease losses	349,617	329,659	976,504	960,531
Noninterest income
Mortgage income	13,106	7,438	28,141	16,134
Insurance commissions	(2,701)	(967)	10,461	13,505
Realized gains on investment securities available for sale, net	21,425	1,136	54,972	6,855
Other	2,008	6,176	5,330	15,129
Total noninterest income	120,572	100,930	349,985	311,468
Noninterest expense
Salaries and wages	147,297	137,841	439,185	406,788
Employee benefits	31,788	28,358	100,663	91,090
Occupancy expense	27,990	28,163	85,026	82,810
Equipment expense	29,430	28,770	86,054	83,999
Processing fees paid to third parties	11,927	7,250	32,485	20,980
FDIC insurance expense	2,167	2,440	9,364	7,857
Collection and foreclosure-related expenses	2,168	3,044	10,171	9,725
Merger-related expenses	3,507	3,892	12,108	9,695
Other	35,388	30,667	108,256	98,535
Total noninterest expense	291,662	270,425	883,312	811,479
Income before income taxes	178,527	160,164	443,177	460,520
Income taxes	35,843	35,385	89,538	105,023
Net income	142,684	124,779	353,639	355,497
Less: Preferred stock dividends	4,636	0	9,426	0
Net income available to common shareholders	$ 138,048	$ 124,779	$ 344,213	$ 355,497
Average shares outstanding (in shares)	9,836,629	11,060,462	10,137,321	11,286,984
Net income per share	$ 14.03	$ 11.27	$ 33.96	$ 31.50
Wealth management services
Noninterest income
Revenue from contract with customers	$ 19,756	$ 15,957	$ 55,503	$ 51,069
Cardholder services, net
Noninterest income
Revenue from contract with customers	6,763	6,034	18,014	18,324
Other service charges and fees
Noninterest income
Revenue from contract with customers	20,841	27,112	64,776	77,967
Merchant services, net
Noninterest income
Revenue from contract with customers	26,369	25,212	75,152	74,786
ATM income
Noninterest income
Revenue from contract with customers	7,892	8,237	22,829	23,823
Realized gains on investment securities available for sale, net
Noninterest income
Revenue from contract with customers	3,576	2,960	10,453	9,105
Gain on extinguishment of debt
Noninterest income
Revenue from contract with customers	$ 1,537	$ 1,635	$ 4,354	$ 4,771

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 142,684	$ 124,779	$ 353,639	$ 355,497
Unrealized (losses) gains on securities available for sale:
Unrealized gains on securities available for sale arising during the period	9,781	3,932	182,690	62,974
Tax effect	(2,251)	(906)	(42,019)	(14,485)
Reclassification adjustment for realized gains on securities available for sale included in income before income taxes	(21,425)	(1,136)	(54,972)	(6,855)
Tax effect	4,928	262	12,644	1,577
Total change in unrealized (losses) gains on securities available for sale, net of tax	(8,967)	2,152	98,343	43,211
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	0	6,095	0	18,004
Tax effect	0	(1,402)	0	(4,141)
Total change in unrealized losses on securities available for sale transferred to held to maturity, net of tax	0	4,693	0	13,863
Change in pension obligation:
Amortization of actuarial losses and prior service cost	6,332	2,745	18,994	8,235
Tax effect	(1,457)	(631)	(4,370)	(1,894)
Total change in pension obligation, net of tax	4,875	2,114	14,624	6,341
Net current period other comprehensive (loss) income	(4,092)	8,959	112,967	63,415
Total comprehensive income	$ 138,592	$ 133,738	$ 466,606	$ 418,912

Consolidated Statements of Chan

Consolidated Statements of Changes In Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Adoption of ASC 326	Class A Common Stock	Class B Common Stock	Common StockClass A Common Stock	Common StockClass B Common Stock	Preferred Stock	Surplus	Retained Earnings	Retained EarningsAdoption of ASC 326	Retained EarningsClass A Common Stock	Retained EarningsClass B Common Stock	Accumulated Other Comprehensive (Loss) Income
Beginning balance, shareholders' equity at Dec. 31, 2018	$ 3,488,954				$ 10,623	$ 1,005	$ 0	$ 493,962	$ 3,218,551				$ (235,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	355,497								355,497
Other comprehensive income (loss), net of tax	63,415												63,415
Stock repurchased during period	(325,900)		$ (325,916)		(744)			(325,172)
Cash dividends			(12,262)	$ (1,206)							$ (12,262)	$ (1,206)
Preferred stock dividends declared				(9,426)								(9,426)
Ending balance, shareholders' equity at Sep. 30, 2019	3,568,482				9,879	1,005	0	168,790	3,560,580				(171,772)
Beginning balance, shareholders' equity at Jun. 30, 2019	3,574,613				10,175	1,005	0	303,880	3,440,284				(180,731)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	124,779								124,779
Other comprehensive income (loss), net of tax	8,959												8,959
Stock repurchased during period	(135,400)		(135,386)		(296)			(135,090)
Cash dividends			(4,081)	(402)							(4,081)	(402)
Ending balance, shareholders' equity at Sep. 30, 2019	3,568,482				9,879	1,005	0	168,790	3,560,580				(171,772)
Beginning balance, shareholders' equity at Dec. 31, 2019	3,586,184	$ 36,943			9,624	1,005	$ 0	$ 44,081	3,658,197	$ 36,943			(126,723)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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	0
Stock repurchased during period	$ (333,755)				(813)			$ (44,081)	(288,861)
Cash dividends			(10,869)	(1,206)							(10,869)	(1,206)
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)
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)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock repurchased during period (in shares)	117,700	295,900	813,090	744,400
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.40	$ 0.40	$ 1.20	$ 1.20
Common Stock \| Class A Common Stock
Stock repurchased during period (in shares)	117,700	295,900	813,090	744,400

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES
Net income	$ 353,639	$ 355,497
Adjustments to reconcile net income to cash provided by operating activities:
Provision (credit) for loan and lease losses	52,949	23,714
Deferred tax expense (benefit)	16,227	43,939
Net change in current taxes	(38,878)	(33,433)
Depreciation	81,169	77,024
Net (decrease) increase in accrued interest payable	(7,620)	14,147
Net (increase) decrease in income earned not collected	(28,025)	(3,567)
Contribution to pension plans	(100,000)	(3,500)
Contribution to pension plans	(54,972)	(6,855)
Marketable equity securities gain (loss), net	(10,461)	(13,505)
Origination of loans held for sale	(775,900)	(518,894)
Origination of loans held for sale	743,508	490,261
Gain on sale of loans held for sale	(25,728)	(10,607)
Net writedowns/losses on other real estate	2,360	1,924
Net accretion of premiums and discounts	4,599	(24,769)
Amortization of intangible assets	18,589	17,934
Net change in mortgage servicing rights	(1,332)	(3,770)
Net change in other assets	(6,394)	2,536
Net change in other liabilities	(7,472)	(8,916)
Net cash provided by operating activities	216,258	399,160
INVESTING ACTIVITIES
Net increase in loans outstanding	(3,876,578)	(629,705)
Purchases of investment securities available for sale	(7,608,380)	(3,706,949)
Purchases of investment securities held to maturity	(856,047)	(223,353)
Purchases of marketable equity securities	(333,126)	(23,238)
Proceeds from maturities/calls of investment securities held to maturity	134,736	305,479
Proceeds from maturities/calls of investment securities available for sale	1,909,462	1,690,277
Proceeds from sales of investment securities available for sale	3,889,386	1,746,099
Proceeds from sales of marketable equity securities	332,762	12,739
Net increase in overnight investments	(1,994,972)	(150,006)
Proceeds from sales of portfolio loans	0	24,247
Repayment of FDIC Shared-Loss Payable	(99,468)	0
Proceeds from sales of other real estate	19,683	18,892
Proceeds from sales of premises and equipment	46	128
Purchases of premises and equipment	(98,490)	(89,219)
Business acquisitions, net of cash acquired	(59,999)	(73,792)
Net cash used in investing activities	(8,640,985)	(1,098,401)
FINANCING ACTIVITIES
Net decrease in time deposits	(759,491)	376,596
Net increase in demand and other interest-bearing deposits	8,556,808	701,426
Net decrease in short-term borrowings	(44,344)	(138,741)
Repayments of Other Long-term Debt	(82,747)	(43,545)
Origination of long-term obligations	400,000	100,000
Proceeds from Debt, Net of Issuance Costs	345,849	0
Proceeds from issuance of preferred stock, net of issuance costs	339,937
Proceeds from Issuance of Preferred Stock and Preference Stock	345,000	0
Repurchase of common stock	(333,755)	(321,263)
Cash dividends paid	(21,830)	(13,739)
Net cash (used in) provided by financing activities	8,400,427	660,734
Change in cash and due from banks	(24,300)	(38,507)
Cash and due from banks at beginning of period	376,719	327,440
Cash and due from banks at end of period	352,419	288,933
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Transfers of loans to other real estate	10,295	13,242
Dividends declared but not paid	3,926	4,397
Net reclassification of portfolio loans (to) from loans held for sale	(3,464)	22,758
Transfers of premises and equipment to other real estate	8,133	2,184
Unsettled common stock repurchases	$ 0	$ 4,653

Accounting Policies and Basis o

Accounting Policies and Basis of Presentation	9 Months Ended
Accounting Policies and Basis of Presentation	Sep. 30, 2020
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 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, 2019. 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, fair value measurements, and income taxes. Issuance of Preferred Stock and Subordinated Debt On March 4, 2020, BancShares completed its public offering of $350 million aggregate principal amount of its 3.375% Fixed-to-Floating Rate Subordinated Notes due 2030 and redeemable at the option of BancShares starting in 2025. On March 12, 2020, BancShares issued and sold an aggregate of 13,800,000 depositary shares, each representing a 1/40th interest in a share of 5.375% Non-Cumulative Perpetual Preferred Stock, Series A, par value $0.01 per share, with a liquidation preference of $25 per Depositary Share (equivalent to $1,000 per share of Series A Preferred Stock) for a total of $345 million. The capital raise provides liquidity for general corporate purposes, which may include, but is not limited to, providing capital to support our growth organically or through strategic acquisitions, financing investments and capital expenditures, for funding investments in First Citizens Bank as regulatory capital, and redeeming or repurchasing our common stock. Share Repurchases During the third quarter of 2020, BancShares repurchased 117,700 shares of Class A common stock for $47.1 million at an average cost per share of $399.82. During the third quarter of 2019, BancShares purchased a total of 295,900 shares of Class A common stock for $135.4 million at an average cost per share of $457.50. During the nine months ended September 30, 2020 , BancShares repurchased 813,090 shares of Class A common stock for $333.8 million at an average cost per share of $410.48. During the nine months ended September 30, 2019 , BancShares repurchased a total of 744,400 shares of Class A common stock for $325.9 million at an average cost per share of $437.84 . All Class A common stock repurchases were consummated under previously approved authorizations. The share repurchases during 2020 and 2019 included 45,000 shares and 50,000 shares, respectively, of Class A common stock repurchased from Ella Ann Holding, as trustee of her revocable trust. Pursuant to the existing share repurchase authorization and BancShares’ related person transaction policy, the Board of Director’s (the “Board”) independent Audit Committee reviewed and approved the repurchase of up to 250,000 shares held by Mrs. Holding on or before April 30, 2020. Upon expiration of the most recent share repurchase authorization on July 31, 2020, share repurchase activity has ended and will be reevaluated in subsequent periods. 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 coronavirus (“COVID-19”) and was supplemented with subsequent legislation. Overseen by the United States (“U.S.”) Treasury Department, the SBA-PPP offers cash-flow assistance to nonprofit and small business employers through guaranteed loans for expenses incurred between February 15, 2020, and August 8, 2020. 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 SBA to temporarily guarantee these loans. The SBA began processing forgiveness payments during the fourth quarter of 2020. 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 loan as an adjustment to yield using the effective interest method. As of September 30, 2020, loans outstanding of $3.11 billion have generated $28.9 million and $47.9 million of interest income during the three and nine month periods ended September 30, 2020, respectively. Remaining unamortized deferred fees and costs on SBA-PPP loans are $76.0 million as of September 30, 2020. Recently Adopted Accounting Pronouncements Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2018-13 - Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement This ASU modifies the disclosure requirements on fair value measurements by eliminating the requirements to disclose (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy (2) the policy for timing of transfers between levels and (3) the valuation processes for Level 3 fair value measurements. This ASU also added specific disclosure requirements for fair value measurements for public business entities including the requirement to disclose the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. BancShares adopted this ASU during the first quarter of 2020 and have made all applicable updates to the disclosure within the Notes to the Unaudited Consolidated Financial Statements. FASB ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment This ASU eliminates Step 2 from the goodwill impairment test. Under Step 2, an entity had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities (including unrecognized assets and liabilities) following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Instead, under the amendments in this ASU, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative test. BancShares adopted this ASU during the first quarter 2020 with no impact to our consolidated financial position or consolidated results of operations as a result of the adoption. There was no impairment recorded as a result of our annual assessment during the third quarter of 2020. FASB ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This ASU (and all subsequent ASUs on this topic) introduce the current expected credit loss (“CECL”) model, a new credit loss methodology, replacing multiple existing impairment methods in current GAAP, which generally require that a loss be incurred before it is recognized. The amendments in this ASU require loss estimates be determined over the lifetime of the asset and broaden the information that an entity must consider in developing its expected credit losses. The ASU does not specify a method for measuring expected credit losses and allows an entity to apply methods that reasonably reflect its expectations of the credit loss estimate based on the entity's size, complexity and risk profile. In addition, the disclosures of credit quality indicators in relation to the amortized cost of financing receivables, a current disclosure requirement, are further disaggregated by year of origination. BancShares adopted this ASU (and all subsequent ASUs on this topic) as of January 1, 2020 using the modified retrospective approach for all loans, leases, debt securities designated as held to maturity, and unfunded loan commitments. BancShares adopted the ASU using the prospective approach for debt securities available for sale and purchased credit deteriorated (“PCD”) loans previously accounted for under Accounting Standard Codification (“ASC”) ASC 310-30. Results for reporting periods beginning after January 1, 2020 are presented under ASC 326, while prior period amounts continue to be reported in accordance with previously applicable GAAP. BancShares made changes to loan classifications and segmentation in order to align with ASC 326 requirements and facilitate CECL modeling. Using this updated segmentation, BancShares developed new loan level models to estimate the allowance for credit losses (“ACL”) and facilitate revised disclosures. The information presented below represents changes from Note A, Accounting Policies and Basis of Presentation, included in BancShares’ Annual Report on Form 10-K for the year ended December 31, 2019, as well as information on the impact of adoption. Accounting Policy - Debt Securities BancShares classifies debt securities as held to maturity (“HTM”) or available for sale (“AFS”). Debt securities are classified as HTM when BancShares has the intent and ability to hold the securities to maturity and are reported at amortized cost. Other debt securities are classified as AFS and reported at estimated fair value, with unrealized gains and losses, net of income taxes, reported in Accumulated Other Comprehensive Income (“AOCI”). Amortization of premiums and accretion of discounts for debt securities are included in interest income. Realized gains and losses from the sale of debt securities are determined by specific identification on a trade date basis and are included in noninterest income. BancShares performs pre-purchase due diligence and evaluates the credit risk of AFS and HTM debt securities purchased directly into our portfolio or via acquisition. If securities have evidence of more than insignificant credit deterioration since issuance, they are designated as purchased credit deteriorated (“PCD”). P CD securities are recorded at fair value at the date of acquisition which includes an associated allowance that is added to the purchase price or fair value to arrive at the Day 1 amortized cost basis. The difference between the purchase price and the Day 1 amortized cost is amortized or accreted to interest income over the contractual life of the securities using the effective interest method. For AFS securities, management performs a quarterly analysis of the investment portfolio to evaluate securities currently in an unrealized loss position for potential credit-related impairment. If BancShares intends to sell a security, or does not have the intent and ability to hold a security before recovering the amortized cost, the entirety of the unrealized loss is immediately recorded in earnings. For the remaining securities, an analysis is performed to determine if any portion of the unrealized loss recorded relates to credit impairment. If credit related impairment exists, the amount is recorded through the ACL and related provision. This review includes indicators such as changes in credit rating, delinquency, bankruptcy or other significant news event impacting the issuer. BancShares’ portfolio of HTM debt securities is made up of mortgage-backed securities issued by government agencies and government sponsored entities. Given the historically 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, we determined zero expected credit losses on the HTM portfolio. Accounting Policy - 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 as of the date of acquisition. Non-Purchased Credit Deteriorated Loans Non-Purchased Credit Deteriorated (“Non-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. Originated loans for which management has the intent and ability to hold for the foreseeable future are classified as held for investment and carried at the principal amount outstanding net of any unearned income, charge-offs and unamortized fees and costs. Nonrefundable fees collected and certain direct costs incurred related to loan originations are deferred and recorded as an adjustment to loans outstanding. The net amount of the nonrefundable fees and costs is amortized to interest income over the contractual lives using methods that approximate a constant yield. Purchased loans which do not reflect more than insignificant credit deterioration at acquisition are classified as non-PCD loans. These loans are recorded at fair value at the date of acquisition and an initial allowance is recorded on these assets as provision expense at the date of acquisition. The difference between the fair value and the unpaid principal balance at the acquisition date is amortized or accreted to interest income over the contractual life of the loan using the effective interest method. Purchased Credit Deteriorated Loans Purchased loans which reflect a more than insignificant credit deterioration since origination as of the date of acquisition are classified as PCD and are recorded at acquisition-date amortized cost, which is the purchase price or fair value in a business combination, plus our initial estimate of expected credit losses. The difference between the unpaid principal balance and the acquisition date amortized cost is amortized or accreted to interest income over the contractual life of the loan using the effective interest method. The performance of all loans within the BancShares portfolio is subject to a number of external risks, including but not limited to changes in the overall health of the economy, declines in real estate or other collateral values, changes in the demand for products and services and personal events, such as death, disability or change in marital status. BancShares evaluates and reports its non-PCD and PCD loan portfolios separately, and each non-PCD portfolio is further divided into commercial and consumer segments based on the type of borrower, purpose, collateral and/or our underlying credit management processes. Additionally, non-PCD commercial and consumer loans are assigned to loan classes, which further disaggregate the loan portfolio. PCD loans are reported as a single loan segment and class. Upon adoption of ASC 326, owner occupied and non-owner occupied commercial real estate were segregated into separate classes within the commercial segment. Similarly, consumer auto was segregated into its own class within the consumer segment. These enhancements were made to capture the unique credit characteristics used in our CECL models. Information for reporting periods beginning after January 1, 2020 are presented in accordance with ASC 326 and reflect changes to the respective classes, while prior period amounts continue to be reported in accordance with previously applicable GAAP and have not been reclassified to conform to the current financial statement presentation. The following represent our classes of loans as of January 1, 2020 upon adoption of ASC 326 (with the exception of SBA-PPP, which was added during second quarter 2020): Commercial loans and leases Construction and land development - Construction and land development consists of loans to finance land for development of commercial or residential real property and construction of multifamily apartments or other commercial properties. These loans are highly dependent on the supply and demand for commercial real estate as well as the demand for newly constructed residential homes and lots acquired for development. Deterioration in demand could result in decreased collateral values, which could make repayments of outstanding loans difficult for customers. Owner occupied commercial mortgage - Owner occupied commercial mortgages consists of loans to purchase or re-finance owner occupied nonresidential properties. This includes office buildings, other commercial facilities, and farmland. Commercial mortgages secured by owner occupied properties are primarily dependent on the ability of borrowers to achieve business results consistent with those projected at loan origination. While these loans and leases are collateralized by real property in an effort to mitigate risk, it is possible the liquidation of collateral will not fully satisfy the obligation. Non-owner occupied commercial mortgage - Non-owner occupied commercial mortgage consists of loans to purchase or refinance investment nonresidential properties. This includes office buildings and other facilities rented or leased to unrelated parties, as well as farmland and multifamily properties. The primary risk associated with income producing commercial mortgage loans is the ability of the income-producing property that collateralizes the loan to produce adequate cash flow to service the debt. While these loans and leases are collateralized by real property in an effort to mitigate risk, it is possible the liquidation of collateral will not fully satisfy the obligation. Commercial and industrial and leases - Commercial and industrial loans consist of loans or lines of credit to finance accounts receivable, inventory or other general business needs, business credit cards, and lease financing agreements for equipment, vehicles, or other assets. The primary risk associated with commercial and industrial and lease financing loans is the ability of borrowers to achieve business results consistent with those projected at origination. Failure to achieve these projections presents risk the borrower will be unable to service the debt consistent with the contractual terms of the loan or lease. SBA-PPP - These loans were originated as part of the SBA-PPP to finance payroll and other costs for nonprofit and small businesses impacted by the COVID-19 pandemic. These loans are guaranteed by the SBA and borrowers have the ability to qualify for loan forgiveness through the U.S. Treasury. Consumer loans Residential mortgage - Residential mortgage consists of loans to purchase or refinance the borrower’s primary dwelling, secondary residence or vacation home and are often secured by 1-4 family residential property. Significant and rapid declines in real estate values can result in borrowers having debt levels in excess of the current market value of the collateral. Revolving mortgage - Revolving mortgage consists of home equity lines of credit and other lines of credit secured by first or second liens on the borrower’s primary residence. These loans are secured by both senior and junior liens on the residential real estate and are particularly susceptible to declining collateral values. This risk is elevated for loans secured by junior lines as a substantial decline in value could render the junior lien position effectively unsecured. Construction and land development - Construction and land development consists of loans to construct a borrower’s primary or secondary residence or vacant land upon which the owner intends to construct a dwelling at a future date. These loans are typically secured by undeveloped or partially developed land in anticipation of completing construction of a 1-4 family residential property. There is risk these construction and development projects can experience delays and cost overruns exceeding the borrower’s financial ability to complete the project. Such cost overruns can result in foreclosure of partially completed and unmarketable collateral. Consumer auto loans - Consumer auto loans consist of installment loans to finance purchases of vehicles. These loans include direct auto loans originated in bank branches, as well indirect auto loans originated through agreements with auto dealerships. The value of the underlying collateral within this class is at risk of potential rapid depreciation which could result in unpaid balances in excess of the collateral. Other consumer - Other consumer loans consist of loans to finance unsecured home improvements, student loans and revolving lines of credit that can be secured or unsecured, including personal credit cards. The value of the underlying collateral within this class is at risk of potential rapid depreciation which could result in unpaid balances in excess of the collateral. Accounting Policy - Nonperforming Assets and Troubled Debt Restructurings Nonperforming Assets Nonperforming assets (“NPAs”) include nonaccrual loans, past due securities and foreclosed property. Foreclosed property consists of real estate and other assets acquired as a result of loan defaults and is discussed below. All loans are classified as past due when the payment of principal and interest based upon contractual terms is greater than 30 days delinquent. Loans are generally placed on nonaccrual when principal or interest becomes 90 days past due or when it is probable the principal or interest is not fully collectible. When loans are placed on nonaccrual, all previously uncollected accrued interest is reversed from interest income and the ongoing accrual of interest is discontinued. All payments received thereafter are applied as a reduction of the remaining principal balance as long as doubt exists as to the ultimate collection of the principal. Loans and leases are generally removed from nonaccrual status when they become current for a sustained period of time and there is no longer concern as to the collectability of principal and interest. Securities are also classified as past due when the payment of principal and interest based upon contractual terms is greater than 30 days delinquent. Missed interest payments on securities are rare. We review all securities with delinquent interest and immediately charge off any accrued interest determined to be uncollectible. Troubled Debt Restructurings A loan is considered a troubled debt restructuring (“TDR”) when both of the following occur: (1) a modification to a borrower’s debt agreement is made and (2) a concession is granted for economic or legal reasons related to a borrower’s financial difficulties that otherwise would not be granted. TDR concessions could include short-term deferrals of interest, modifications of payment terms, or (in certain limited instances) forgiveness of principal or interest. Loans restructured as a TDR are treated and reported as such for the remaining life of the loan. TDR loans can be nonaccrual or accrual, depending on the individual facts and circumstances of the borrower. In circumstances where a portion of the loan balance is charged-off, the remaining balance is typically classified as nonaccrual. Accounting Policy - Allowance for Credit Losses Loans Loans within the various reporting classes are segregated into pools with similar risk characteristics and models are built to estimate the ACL. These loan level ACL models estimate the probability of default and loss given default for individual loans within the risk pool based on historical loss experience, borrower characteristics, collateral type, forecasts of relevant economic conditions, expected future recoveries and other factors. Pools for estimating the ACL are aggregated into loan classes, as described above, which roll up into commercial and consumer loan segments. Non-PCD and PCD loans are modeled together within the loan level models using acquired and PCD indicator variables to provide differentiation of individual loan risk. BancShares uses a two The ACL for SBA-PPP loans originated during 2020 are separately evaluated given the explicit government guarantee. This analysis, which incorporated historical experience with similar SBA guarantees and underwriting, concluded the likelihood of loss was remote and therefore these loans were assigned a zero expected credit loss in the ACL. The ACL represents management’s best estimate of credit losses expected over the life of the loan, adjusted for expected contractual payments and the impact of prepayment expectations. Prepayment assumptions were developed through a review of BancShares’ historical prepayment activity and began with a review of prepayment assumptions utilized in other modeling activities. Estimates for loan losses are determined by analyzing quantitative and qualitative components present as of the evaluation date. Adjustments to the ACL are recorded with a corresponding entry to provision for credit losses. Loan balances considered uncollectible are charged-off against the ACL. Recoveries of amounts previously charged-off are credited to the ACL. A primary component of determining the ACL on loans is the actual net loss history of the various loan pools. For commercial pools, key factors utilized in the models include delinquency trends as well as macroeconomic variables such as unemployment and commercial real estate price index. For consumer pools, key factors include delinquency trends and the borrower’s original credit score, as well as other macroeconomic variables such as unemployment, gross domestic product, home price index, and commercial real estate index. As the models project losses over the life of the loans, prepayment assumptions also serve as significant inputs. Model outputs may be adjusted through a qualitative assessment to reflect economic conditions and trends not captured within the models including credit quality, concentrations, and significant policy and underwriting changes. Within our ACL model, TDRs meet the definition of default and are given a 100% probability of default rating. TDRs are not individually evaluated unless determined to be collateral-dependent. Therefore, loss given default is calculated based on the individual risk characteristics of the loan as defined in the model. When loans do not share risk characteristics similar to others in the pool, the ACL is evaluated on an individual basis. Given that BancShares' CECL models are loan level models, the population of loans evaluated individually is minimal and consists primarily of loans greater than $500 thousand and determined to be collateral-dependent. BancShares elected the practical expedient allowed under ASC 326 to assess the collectability of these loans, where repayment is expected to be provided substantially through operation or sale of collateral, based on the fair value of the underlying collateral. The fair value of the collateral is estimated using appraised and market values (appropriately adjusted for an assessment of the sales and marketing costs when applicable). A specific allowance is established, or partial charge-off is recorded, for the difference between the excess amortized cost of loan and the collateral’s estimated fair value. Accrued Interest Receivable BancShares has elected not to measure an ACL for accrued interest receivable and has excluded it from the amortized cost basis of loans and held to maturity debt securities as our accounting policies and credit monitoring provide that uncollectible accrued interest is reversed or written off against interest income in a timely manner. Unfunded Commitments A reserve for unfunded commitments is established for off-balance sheet exposures such as unfunded balances for existing lines of credit, commitments to extend future credit, as well as both standby and commercial letters of credit when there is a contractual obligation to extend credit and when this extension of credit is not unconditionally cancellable (i.e. commitment cannot be canceled at any time). These unfunded commitments are assessed to determine both the probability of funding as well the expectation of future losses. The expected funding balance is used in the probability of default and loss given default models to determine the reserve. The reserve for unfunded commitments was $14.0 million at September 30, 2020, and is recorded within other liabilities with changes recorded through other expense. Adoption Impact Upon adoption, BancShares recorded a net decrease of $37.9 million in the ACL which included a reduction of $56.9 million in the ACL on non-PCD loans, offset by an increase of $19.0 million in the ACL on PCD loans. The $56.9 million reduction in the ACL on non-PCD loans, as well as an $8.9 million increase in the reserve for unfunded commitments, net of deferred taxes, resulted in an increase in retained earnings of $36.9 million. The $19.0 million increase in the ACL on PCD loans was a reclassification of the PCD credit discount and resulted in a gross up of loan balances by this same amount and did not have any effect on retained earnings. Impact to total capital and capital ratios was not significant and we did not elect the capital phase-in option allowable for regulatory reporting purposes. There was no ACL recorded on debt securities held to maturity at adoption. The largest changes in the ACL, affecting beginning retained earnings as a result of the adoption, were decreases in the ACL on commercial loan segments as these portfolios have exhibited strong historical credit performance and have relatively short average lives. The reduction in ACL on these segments was partially offset by increases in ACL on our consumer loan segments primarily due to their longer average lives. The increase in the reserve for unfunded commitments was primarily due to increases in the scope of off-balance sheet exposures considered in this estimate due to the provisions in ASC 326. BancShares adopted this ASU using the prospective transition approach for PCD loans previously accounted for under ASC 310-30. In accordance with the standard, we did not assess whether purchased credit impaired (“PCI”) loans met the criteria of PCD as of the date of adoption and all loans previously classified as PCI were updated to the PCD classification. Pools utilized for PCI accounting under ASC 310-30 were dissolved upon adoption. Loans from performing PCI pools, not previously considered nonaccrual of $47.0 million, were reclassified into nonaccrual status as a result of adoption. PCD loans were assessed using the loan level probability of default and loss given default models, as well as utilizing prior specific loan reviews to inf

Business Combinations

Business Combinations	9 Months Ended
Business Combinations	Sep. 30, 2020
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. Subject to the fulfillment of customary closing conditions, the parties anticipate that the Transaction will close in the first half of 2021. 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 .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. The Merger Agreement requires that, effective as of the Effective Time, the Boards of Directors of the combined company and the combined bank will consist of 14 directors, (i) 11 of whom will be members of the current Board of Directors of BancShares, and (ii) three of whom will be selected from among the current Board of Directors of CIT and will include as one of those three Ellen R. Alemany, Chairwoman and Chief Executive Officer of CIT. Completed Business Combinations BancShares evaluated the financial statement significance for all business combinations completed during 2020 and concluded the completed business combinations noted below are not material to its consolidated financial statements, individually or in aggregate, and therefore, pro forma financial data is not included. Each transaction is accounted for under the acquisition method of accounting and, accordingly, assets acquired and liabilities assumed are recorded at their estimated fair values as of the acquisition date. Fair values are preliminary and subject to refinement for up to one year after the closing date of the acquisition as additional information regarding closing date fair value becomes available. As part of the accounting for each acquisition, we perform an analysis of the acquired bank’s loan portfolio and based on such credit factors as past due status, nonaccrual status, life-to-date charge-offs and other quantitative and qualitative considerations segregate the acquired loans into PCD loans and non-PCD loans. PCD loans are accounted for under ASC 326-20, and non-PCD loans which do not meet this criteria are accounted for under ASC 310-20. Additionally, we perform an analysis of the acquired bank’s portfolio of debt securities to determine if any debt securities should be designated PCD. Community Financial Holding Company, Inc. On February 1, 2020, FCB completed the merger of Duluth, Georgia-based Community Financial Holding Company, Inc. (“Community Financial”) and its bank subsidiary, Gwinnett Community Bank. Under the terms of the agreement, total cash consideration of $2.3 million was paid to the shareholders of Community Financial. The merger allows FCB to expand its presence and enhance banking efforts in Georgia. The fair value of the assets acquired was $221.4 million, including $110.6 million in non-PCD loans, $23.4 million in PCD loans, net of an ACL of $1.2 million, and $536 thousand in a core deposit intangible. No debt securities purchased in the transaction were designated PCD. Liabilities assumed were $219.8 million, of which $209.3 million were deposits. As a result of the transaction, FCB recorded $686 thousand of goodwill. The amount of goodwill represents the excess purchase price over the estimated fair value of the net assets acquired. The premium paid reflects the increased market share and related synergies expected to result from the acquisition. None of the goodwill was deductible for income tax purposes as the merger was accounted for as a qualified stock purchase. The following table provides the purchase price as of the acquisition date and the identifiable assets acquired and liabilities assumed at their estimated fair values: (Dollars in thousands) As recorded by FCB Purchase price $ 2,320 Assets Cash and due from banks $ 1,085 Overnight investments 35,129 Investment securities 30,146 Loans 133,989 Premises and equipment 7,624 Other real estate owned 9,813 Income earned not collected 558 Intangible assets 536 Other assets 2,520 Total assets acquired 221,400 Liabilities Deposits 209,340 Borrowings 9,925 Other liabilities 501 Total liabilities assumed $ 219,766 Fair value of net assets acquired 1,634 Goodwill recorded for Community Financial $ 686 Merger-related expenses of $342 thousand and $2.1 million were recorded for the three and nine months ended September 30, 2020, respectively. Loan-related interest income generated from Community Financial was approximately $4.1 million since the acquisition date. The ongoing contribution of this transaction to BancShares’ financial statements is not considered material, and therefore pro forma financial data is not included. Entegra Financial Corp. On December 31, 2019, FCB completed the merger of Franklin, North Carolina-based Entegra Financial Corp. (“Entegra”) and its bank subsidiary, Entegra Bank. In order to obtain regulatory approval, FCB entered into an agreement for Select Bank & Trust Company (“Select Bank”) to purchase three North Carolina branches, located in Highlands, Sylva and Franklin. On April 17, 2020, FCB completed the divestiture of the branches including loans and leases, premises and equipment and total deposits with fair values of $110.1 million, $2.1 million and $184.8 million, respectively. The Select Bank purchase price for the divested branches included an 8% premium for deposits acquired that was applied against goodwill generated as part of the merger with Entegra Bank.

Investments

Investments	9 Months Ended
Investments	Sep. 30, 2020
Investments [Abstract]
Investments	INVESTMENTS Information for reporting periods beginning after January 1, 2020 are presented in accordance with ASC 326 and reflect changes required by the adoption of this standard which includes evaluating held to maturity and available for sale debt securities to determine the need to record a related allowance for credit losses. Prior period information continues to be reported in accordance with previously applicable GAAP. See Note A - Accounting Policies and Basis for Presentation for more detail on our policies and adoption. The amortized cost and fair value of investment securities at September 30, 2020 and December 31, 2019, were as follows: September 30, 2020 (Dollars in thousands) Cost Gross Gross unrealized Allowance for credit losses Fair Investment securities available for sale U.S. Treasury $ 654,588 $ 174 $ — $ — $ 654,762 Government agency 659,260 642 4,961 — 654,941 Residential mortgage-backed securities 5,968,192 101,788 312 — 6,069,668 Commercial mortgage-backed securities 1,058,640 32,004 434 — 1,090,210 Corporate bonds 543,868 9,132 2,793 — 550,207 Total investment securities available for sale $ 8,884,548 $ 143,740 $ 8,500 $ — $ 9,019,788 Investment in marketable equity securities 100,408 3,353 10,687 93,074 Investment securities held to maturity Residential mortgage-backed securities 614,489 12,905 — — 627,394 Commercial mortgage-backed securities 130,987 650 35 131,602 Other 2,256 — — — 2,256 Total investment securities held to maturity 747,732 13,555 35 — 761,252 Total investment securities $ 9,732,688 $ 160,648 $ 19,222 $ — $ 9,874,114 December 31, 2019 (Dollars in thousands) Cost Gross Gross unrealized Fair Investment securities available for sale U.S. Treasury $ 409,397 $ 602 $ — $ 409,999 Government agency 684,085 928 2,241 682,772 Residential mortgage-backed securities 5,269,060 13,417 15,387 5,267,090 Commercial mortgage-backed securities 373,105 6,974 59 380,020 Corporate bonds 198,278 3,420 132 201,566 State, county and municipal 118,227 — — 118,227 Total investment securities available for sale $ 7,052,152 $ 25,341 $ 17,819 $ 7,059,674 Investment in marketable equity securities 59,262 23,304 233 82,333 Investment securities held to maturity Other 30,996 — — 30,996 Total investment securities held to maturity 30,996 — — 30,996 Total investment securities $ 7,142,410 $ 48,645 $ 18,052 $ 7,173,003 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 United States Small Business Administration. 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 Visa Class B common stock. BancShares’ Visa Class B shares are not considered to have a readily determinable fair value and are recorded at $0. BancShares held FHLB stock of $45.4 million and $43.0 million and other non-marketable equity securities of $13.5 million and $12.5 million at September 30, 2020 and December 31, 2019, respectively. These securities are recorded at cost within other assets. As of September 30, 2020 and January 1, 2020, no ACL was required for available for sale and held to maturity debt securities. At September 30, 2020, accrued interest receivables for available for sale and held to maturity debt securities were $23.6 million and $1.7 million, respectively, and were excluded from the estimate of credit losses. During the three and nine months ended September 30, 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. September 30, 2020 December 31, 2019 (Dollars in thousands) Cost Fair Cost Fair Investment securities available for sale Non-amortizing securities maturing in: One year or less $ 655,609 $ 655,779 $ 406,325 $ 406,927 One through five years 71,262 72,446 24,496 24,971 Five through 10 years 456,620 461,847 185,209 187,868 Over 10 years 14,965 14,897 109,872 110,026 Government agency 659,260 654,941 684,085 682,772 Residential mortgage-backed securities 5,968,192 6,069,668 5,269,060 5,267,090 Commercial mortgage-backed securities 1,058,640 1,090,210 373,105 380,020 Total investment securities available for sale $ 8,884,548 $ 9,019,788 $ 7,052,152 $ 7,059,674 Investment securities held to maturity Non-amortizing securities maturing in: One year or less 1,507 1,507 30,746 30,746 One through five years 749 749 250 250 Residential mortgage-backed securities 614,489 627,394 — — Commercial mortgage-backed securities 130,987 131,602 — — Total investment securities held to maturity $ 747,732 $ 761,252 $ 30,996 $ 30,996 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, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Gross realized gains on sales of investment securities available for sale $ 21,425 $ 1,326 $ 55,651 $ 7,045 Gross realized losses on sales of investment securities available for sale — 190 679 190 Net realized gains on sales of investment securities available for sale $ 21,425 $ 1,136 $ 54,972 $ 6,855 The following table provides the realized and unrealized gains and losses on marketable equity securities for the three and nine months ended September 30, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Marketable equity securities (losses) gains, net $ (2,701) $ (967) $ 10,461 $ 13,505 Less net gains recognized on marketable equity securities sold 2,568 714 39,884 3,029 Unrealized gains (losses) recognized on marketable equity securities held $ (5,269) $ (1,681) $ (29,423) $ 10,476 The following table provides information regarding securities with unrealized losses as of September 30, 2020 and December 31, 2019: September 30, 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 $ 187,167 $ 2,570 $ 338,169 $ 2,391 $ 525,336 $ 4,961 Residential mortgage-backed securities 161,578 259 23,717 53 185,295 312 Commercial mortgage-backed securities 56,703 434 — — 56,703 434 Corporate bonds 81,825 2,738 4,744 55 86,569 2,793 Total $ 487,273 $ 6,001 $ 366,630 $ 2,499 $ 853,903 $ 8,500 December 31, 2019 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 $ 347,081 $ 1,827 $ 63,947 $ 414 $ 411,028 $ 2,241 Residential mortgage-backed securities 2,387,293 14,016 264,257 1,371 2,651,550 15,387 Commercial mortgage-backed securities 35,926 59 — — 35,926 59 Corporate bonds 7,714 123 4,749 9 12,463 132 Total $ 2,778,014 $ 16,025 $ 332,953 $ 1,794 $ 3,110,967 $ 17,819 As of September 30, 2020, there were 38 investment securities available for sale with continuous losses for more than 12 months, of which 37 were government sponsored enterprise-issued mortgage-backed securities or government agency securities and one was a corporate bond. None of the unrealized losses identified as of September 30, 2020, or December 31, 2019, relate to the marketability of the securities or the issuers’ 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 $4.48 billion at September 30, 2020, and $3.93 billion at December 31, 2019, 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, 2020. 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, 2020.

Loans and Leases

Loans and Leases	9 Months Ended
Loans and Leases	Sep. 30, 2020
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-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 and are reported by loan segments and classes as defined in Note A - Accounting Polices and Basis of Presentation. 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, 2020 and December 31, 2019: (Dollars in thousands) September 30, 2020 Commercial: Construction and land development $ 1,054,186 Owner occupied commercial mortgage 10,683,822 Non-owner occupied commercial mortgage 2,965,904 Commercial and industrial and leases 4,797,344 SBA-PPP 3,112,676 Total commercial loans 22,613,932 Consumer: Residential mortgage 5,463,646 Revolving mortgage 2,145,506 Construction and land development 347,850 Consumer auto 1,234,196 Consumer other 544,136 Total consumer loans 9,735,334 Total non-PCD loans and leases 32,349,266 PCD loans 495,878 Total loans and leases $ 32,845,144 (Dollars in thousands) December 31, 2019 Commercial: Construction and land development $ 1,013,454 Commercial mortgage 12,282,635 Other commercial real estate 542,028 Commercial and industrial and leases 4,403,792 Other 310,093 Total commercial loans 18,552,002 Noncommercial: Residential mortgage 5,293,917 Revolving mortgage 2,339,072 Construction and land development 357,385 Consumer 1,780,404 Total noncommercial loans 9,770,778 Total non-PCI loans and leases 28,322,780 PCI loans 558,716 Total loans and leases $ 28,881,496 Accrued interest receivable on loans at September 30, 2020 was $111.8 million and was excluded from the estimate of credit losses. Management reviewed this policy election during the second quarter of 2020 due to increased accrued interest receivable balances as a result of loan deferrals in response to COVID-19. We have concluded that the policy election remains appropriate as of September 30, 2020. At September 30, 2020, $11.81 billion in non-PCD loans with a lendable collateral value of $8.19 billion were used to secure $652.7 million in Federal Home Loan Bank (“FHLB”) of Atlanta advances, resulting in additional borrowing capacity of $7.54 billion. At December 31, 2019, $9.41 billion in non-PCD loans with a lendable collateral value of $6.57 billion were used to secure $563.7 million in FHLB of Atlanta advances, resulting in additional borrowing capacity of $6.01 billion. At September 30, 2020, $3.97 billion in non-PCD loans with a lendable collateral value of $3.21 billion were used to secure additional borrowing capacity at the Federal Reserve Bank (“FRB”). At December 31, 2019, $3.68 billion in non-PCD loans with a lendable collateral value of $2.98 billion were used to secure additional borrowing capacity at the FRB. Certain residential real estate loans are originated to be sold to investors and are recorded in loans held for sale at fair value. In addition, we may change our 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 fair value. Loans held for sale totaled $120.3 million and $67.9 million at September 30, 2020 and December 31, 2019, respectively. Net deferred fees on non-PCD loans and leases, including unearned and unamortized costs and fees, were $83.5 million and $927 thousand at September 30, 2020 and December 31, 2019, respectively. Of the amount outstanding as of September 30, 2020, $76.0 million relates to net deferred fees and costs on SBA-PPP loans. The net unamortized discount related to purchased non-PCD loans and leases was $23.0 million at September 30, 2020 and $30.9 million at December 31, 2019. The net unamortized discount related to PCD loans and leases was $49.2 million at September 30, 2020 and $88.2 million at December 31, 2019. The aging of the outstanding loans and leases, by class, at September 30, 2020 and December 31, 2019 is provided in the tables below. Loans and leases past due 30 days or less 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, 2020 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 7,860 $ — $ 1,502 $ 9,362 $ 1,044,824 $ 1,054,186 Owner occupied commercial mortgage 23,354 5,212 6,695 35,261 10,648,561 10,683,822 Non-owner occupied commercial mortgage 9,854 7,381 6,671 23,906 2,941,998 2,965,904 Commercial and industrial and leases 8,401 3,920 3,862 16,183 4,781,161 4,797,344 SBA-PPP — — — — 3,112,676 3,112,676 Total commercial loans 49,469 16,513 18,730 84,712 22,529,220 22,613,932 Consumer: Residential mortgage 37,921 5,811 36,441 80,173 5,383,473 5,463,646 Revolving mortgage 8,477 1,582 7,508 17,567 2,127,939 2,145,506 Construction and land development 923 — 312 1,235 346,615 347,850 Consumer auto 4,245 1,059 910 6,214 1,227,982 1,234,196 Consumer other 4,490 1,324 1,467 7,281 536,855 544,136 Total consumer loans 56,056 9,776 46,638 112,470 9,622,864 9,735,334 PCD loans 16,298 3,201 32,438 51,937 443,941 495,878 Total loans and leases $ 121,823 $ 29,490 $ 97,806 $ 249,119 $ 32,596,025 $ 32,845,144 December 31, 2019 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 3,146 $ 195 $ 2,702 $ 6,043 $ 1,007,411 $ 1,013,454 Commercial mortgage 20,389 8,774 8,319 37,482 12,245,153 12,282,635 Other commercial real estate 861 331 698 1,890 540,138 542,028 Commercial and industrial and leases 18,269 4,842 5,032 28,143 4,375,649 4,403,792 Other 51 411 126 588 309,505 310,093 Total commercial loans 42,716 14,553 16,877 74,146 18,477,856 18,552,002 Noncommercial: Residential mortgage 45,839 18,289 24,409 88,537 5,205,380 5,293,917 Revolving mortgage 9,729 3,468 9,865 23,062 2,316,010 2,339,072 Construction and land development 977 218 1,797 2,992 354,393 357,385 Consumer 10,481 3,746 3,571 17,798 1,762,606 1,780,404 Total noncommercial loans 67,026 25,721 39,642 132,389 9,638,389 9,770,778 PCI loans 26,478 10,784 28,973 66,235 492,481 558,716 Total loans and leases $ 136,220 $ 51,058 $ 85,492 $ 272,770 $ 28,608,726 $ 28,881,496 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, 2020 and December 31, 2019, were as follows: January 1, 2020 (1) September 30, 2020 (Dollars in thousands) Nonaccrual Nonaccrual Loans and Commercial: Construction and land development $ 4,281 $ 1,564 $ — Owner occupied commercial mortgage 24,476 19,567 1,288 Non-owner occupied commercial mortgage 5,965 8,258 — Commercial and industrial and leases 7,685 10,710 840 Total commercial loans 42,407 40,099 2,128 Consumer: Residential mortgage 44,357 63,646 65 Revolving mortgage 22,411 22,945 — Construction and land development 2,828 689 215 Consumer auto 2,145 2,634 — Consumer other 798 914 1,179 Total consumer loans 72,539 90,828 1,459 PCD loans 53,771 55,527 — Total loans and leases $ 168,717 $ 186,454 $ 3,587 (1) Upon the adoption of ASC 326, BancShares eliminated the pooling of PCI loans and as a result $47.0 million in additional PCD loans were recognized as nonaccrual loans at January 1, 2020. As of September 30, 2020, $27.5 million of these loans remained outstanding. December 31, 2019 (Dollars in thousands) Nonaccrual Loans and Commercial: Construction and land development $ 4,281 $ — Commercial mortgage 29,733 — Commercial and industrial and leases 7,365 1,094 Other commercial real estate 708 — Other 320 — Total commercial loans 42,407 1,094 Noncommercial: Construction and land development 2,828 — Residential mortgage 44,357 45 Revolving mortgage 22,411 — Consumer 2,943 2,152 Total noncommercial loans 72,539 2,197 PCI loans 6,743 24,257 Total loans and leases $ 121,689 $ 27,548 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, 2020 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, 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 $ 247,187 $ 396,322 $ 208,736 $ 132,518 $ 35,780 $ 13,144 $ 11,909 $ — $ 1,045,596 Special Mention 176 — 312 5,436 — — — — 5,924 Substandard 292 832 1,452 — 8 82 — — 2,666 Total 247,655 397,154 210,500 137,954 35,788 13,226 11,909 — 1,054,186 Owner occupied commercial mortgage Pass 2,098,636 2,218,063 1,731,557 1,423,847 1,146,027 1,714,102 101,547 135 10,433,914 Special Mention 5,578 24,032 37,273 12,246 17,433 27,905 3,313 — 127,780 Substandard 17,625 14,618 9,465 24,561 11,693 38,206 5,888 72 122,128 Total 2,121,839 2,256,713 1,778,295 1,460,654 1,175,153 1,780,213 110,748 207 10,683,822 Non-owner occupied commercial mortgage Pass 660,088 624,860 407,230 372,287 304,782 469,429 35,321 — 2,873,997 Special Mention 355 701 11,740 1,500 5,213 3,340 777 — 23,626 Substandard 2,387 19,121 12,839 6,918 10,160 14,873 1,983 — 68,281 Total 662,830 644,682 431,809 380,705 320,155 487,642 38,081 — 2,965,904 Commercial and industrial and leases Pass 1,175,036 1,090,278 562,547 361,442 267,706 352,946 809,256 5,433 4,624,644 Special Mention 3,713 17,409 8,908 5,631 3,641 4,607 13,673 216 57,798 Substandard 12,370 3,598 4,387 5,016 2,707 4,685 25,096 803 58,662 Doubtful — — — — 11 — 2 — 13 Ungraded — — — — — — 56,227 — 56,227 Total 1,191,119 1,111,285 575,842 372,089 274,065 362,238 904,254 6,452 4,797,344 SBA-PPP Pass 3,112,676 — — — — — — — 3,112,676 Total 3,112,676 — — — — — — — 3,112,676 Total commercial $ 7,336,119 $ 4,409,834 $ 2,996,446 $ 2,351,402 $ 1,805,161 $ 2,643,319 $ 1,064,992 $ 6,659 $ 22,613,932 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 $ 1,349,415 $ 1,044,542 $ 754,024 $ 677,727 $ 524,014 $ 1,006,894 $ 26,857 $ — $ 5,383,473 30-59 days 1,450 3,274 10,486 6,124 4,627 11,875 85 — 37,921 60-89 days 19 854 187 316 2,241 2,194 — — 5,811 90 days or greater 173 1,573 2,704 3,948 6,187 18,884 2,972 — 36,441 Total 1,351,057 1,050,243 767,401 688,115 537,069 1,039,847 29,914 — 5,463,646 Revolving mortgage Current — — — — — — 1,969,703 158,236 2,127,939 30-59 days — — — — — — 4,993 3,484 8,477 60-89 days — — — — — — 419 1,163 1,582 90 days or greater — — — — — — 2,449 5,059 7,508 Total — — — — — — 1,977,564 167,942 2,145,506 Construction and land development Current 144,559 140,794 29,400 13,049 6,818 3,721 8,274 — 346,615 30-59 days 250 26 466 96 17 68 — — 923 60-89 days — — — — — — — — — 90 days or greater — — — — — 97 215 — 312 Total 144,809 140,820 29,866 13,145 6,835 3,886 8,489 — 347,850 Consumer auto Current 398,216 380,919 250,602 122,352 61,076 14,817 — — 1,227,982 30-59 days 492 1,400 823 889 425 216 — — 4,245 60-89 days 120 382 224 160 164 9 — — 1,059 90 days or greater 39 306 268 191 54 52 — — 910 Total 398,867 383,007 251,917 123,592 61,719 15,094 — — 1,234,196 Consumer other Current 39,667 33,269 14,505 7,832 9,269 30,406 401,907 — 536,855 30-59 days 145 92 109 12 61 21 4,050 — 4,490 60-89 days 46 42 31 15 — — 1,190 — 1,324 90 days or greater 7 80 8 1 — — 1,371 — 1,467 Total 39,865 33,483 14,653 7,860 9,330 30,427 408,518 — 544,136 Total consumer $ 1,934,598 $ 1,607,553 $ 1,063,837 $ 832,712 $ 614,953 $ 1,089,254 $ 2,424,485 $ 167,942 $ 9,735,334 PCD loans Current $ 24,169 $ 24,565 $ 29,739 $ 34,617 $ 32,149 $ 262,095 $ 14,236 $ 22,371 $ 443,941 30-59 days 3,531 710 940 438 691 9,575 215 198 16,298 60-89 days — 337 54 155 52 2,054 218 331 3,201 90 days or greater 117 2,889 4,594 1,233 773 21,131 54 1,647 32,438 Total PCD $ 27,817 $ 28,501 $ 35,327 $ 36,443 $ 33,665 $ 294,855 $ 14,723 $ 24,547 $ 495,878 Total loans and leases $ 9,298,534 $ 6,045,888 $ 4,095,610 $ 3,220,557 $ 2,453,779 $ 4,027,428 $ 3,504,200 $ 199,148 $ 32,845,144 Loans and leases outstanding at December 31, 2019 by credit quality indicator are provided below: December 31, 2019 Commercial loans and leases (Dollars in thousands) Construction and land Commercial mortgage Other commercial real estate Commercial and industrial and leases Other PCI Total commercial loans and leases Grade: Pass $ 1,004,922 $ 12,050,799 $ 536,682 $ 4,256,456 $ 308,796 $ 148,412 $ 18,157,655 Special mention 2,577 115,164 3,899 44,604 622 44,290 166,866 Substandard 5,955 116,672 1,447 34,148 675 87,970 158,897 Doubtful — — — 3 — 3,657 3 Ungraded — — — 68,581 — — 68,581 Total $ 1,013,454 $ 12,282,635 $ 542,028 $ 4,403,792 $ 310,093 $ 284,329 $ 18,552,002 December 31, 2019 Noncommercial loans and leases (Dollars in thousands) Residential mortgage Revolving mortgage Construction and land development Consumer PCI Total noncommercial loans and leases Days past due: Current $ 5,205,380 $ 2,316,010 $ 354,393 $ 1,762,606 $ 240,995 $ 9,638,389 30-59 days past due 45,839 9,729 977 10,481 13,764 67,026 60-89 days past due 18,289 3,468 218 3,746 5,608 25,721 90 days or greater past due 24,409 9,865 1,797 3,571 14,020 39,642 Total $ 5,293,917 $ 2,339,072 $ 357,385 $ 1,780,404 $ 274,387 $ 9,770,778 Purchased loans and leases The following table summarizes PCD loans acquired in the Community Financial transaction and provides the contractually required payments, less the initial allowance for credit losses and discount to produce the fair value of acquired loans with evidence of more than insignificant credit quality deterioration since origination at the acquisition date: (Dollars in thousands) Community Financial Contractually required payments $ 25,635 Initial PCD allowance 1,193 Discount 1,055 Fair value at acquisition date $ 23,387 The recorded fair values of purchased non-PCD loans acquired in the Community Financial transaction as of the acquisition date are as follows: (Dollars in thousands) Community Financial Commercial: Construction and land development $ 9,428 Owner occupied commercial mortgage 31,473 Non-owner occupied commercial mortgage 25,143 Commercial and industrial and leases 15,065 Total commercial loans 81,109 Consumer: Residential mortgage 21,168 Revolving mortgage 2,084 Construction and land development 5,254 Consumer auto 294 Consumer other 693 Total consumer loans 29,493 Total non-PCD loans $ 110,602

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	9 Months Ended
Allowance for Loan and Lease Losses	Sep. 30, 2020
Receivables [Abstract]
Allowance	ALLOWANCE FOR CREDIT LOSSES (“ACL”) As noted in Note A - Accounting Polices and Basis of Presentation, BancShares determined SBA-PPP loans have zero expected credit losses and as such these are excluded from ACL disclosures included in the following tables. Upon adoption of ASC 326, BancShares recorded a net decrease of $37.9 million in the ACL which included a decrease of $56.9 million in the ACL on non-PCD loans, offset by an increase of $19.0 million in the ACL on PCD loans. The largest changes as a result of adoption were decreases in the ACL on commercial loan segments as these portfolios have exhibited strong historical credit performance and have relatively short average lives. The reduction in ACL on these segments was partially offset by increases in ACL on our consumer loan segments primarily due to their longer average lives. The increase in the ACL on PCD loans was primarily the result of reallocating credit discount from loan balances into ACL. 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, 2020 the primary reason for the ACL change since the adoption of ASC 326, was a $36.1 million reserve build due to the potential economic impact of COVID-19 and its estimated impact on credit losses. Forecasted economic conditions are developed using third party macroeconomic scenarios adjusted based on management’s expectations over a forecast period of two years. Assumptions revert to long term historic averages over a one year period. Significant macroeconomic factors used in estimating the expected losses include unemployment, gross domestic product, home price index and commercial real estate index. Our model results consider baseline, adverse and upside scenarios. To calculate the ACL, we utilized the baseline scenario, which includes improvements to the most significant assumptions and the impact from government stimulus. This result was calibrated using management’s expectation of borrower performance based upon COVID-19 residual risk by industry and geography. These loss estimates were also influenced by BancShares strong credit quality, low net charge-offs and recent credit trends, which remained stable through the quarter ended September 30, 2020. Activity in the ACL by class of loans is summarized as follows: Three months ended September 30, 2020 (Dollars in thousands) Construction Owner occupied commercial mortgage Non-owner occupied commercial mortgage Commercial Residential Revolving Construction and land development - consumer Consumer auto Consumer other PCD Total Allowance for credit losses: Balance at July 1 $ 6,906 $ 22,489 $ 22,149 $ 24,633 $ 42,872 $ 26,640 $ 1,640 $ 8,898 $ 39,295 $ 26,928 $ 222,450 Provision (credits) 120 625 667 3,381 837 (958) (54) 708 1,341 (2,625) 4,042 Charge-offs — (87) — (3,241) (253) (359) — (824) (3,673) (495) (8,932) Recoveries 264 65 10 1,999 275 336 23 401 1,684 1,319 6,376 Balance at September 30 $ 7,290 $ 23,092 $ 22,826 $ 26,772 $ 43,731 $ 25,659 $ 1,609 $ 9,183 $ 38,647 $ 25,127 $ 223,936 Three months ended September 30, 2019 (Dollars in thousands) Construction Commercial Other Commercial Other Residential Revolving Construction Consumer PCI Total Balance at July 1 $ 31,944 $ 48,962 $ 2,342 $ 56,901 $ 2,183 $ 16,932 $ 21,121 $ 2,750 $ 35,105 $ 8,343 $ 226,583 Provision (credits) 208 (1,337) (90) 4,714 54 1,024 (153) 148 3,674 (1,476) 6,766 Charge-offs (116) (1) — (3,047) (42) (313) (534) — (5,594) — (9,647) Recoveries 52 226 — 611 20 68 201 — 1,945 — 3,123 Balance at September 30 $ 32,088 $ 47,850 $ 2,252 $ 59,179 $ 2,215 $ 17,711 $ 20,635 $ 2,898 $ 35,130 $ 6,867 $ 226,825 Nine months ended September 30, 2020 (Dollars in thousands) Construction Owner occupied commercial mortgage Non-owner occupied commercial mortgage Commercial Residential Revolving Construction and land development - consumer Consumer auto Consumer other PCD Total Balance at December 31 $ 33,213 $ 36,444 $ 11,102 $ 61,610 $ 18,232 $ 19,702 $ 2,709 $ 4,292 $ 30,301 $ 7,536 $ 225,141 Adoption of ASC 326 (31,061) (19,316) 460 (37,637) 17,118 3,665 (1,291) 1,100 10,037 19,001 (37,924) Balance at January 1 2,152 17,128 11,562 23,973 35,350 23,367 1,418 5,392 40,338 26,537 187,217 Provision (credits) 4,876 6,011 11,165 10,802 9,339 2,557 209 5,708 7,253 (4,971) 52,949 Initial allowance on PCD loans — — — — — — — — — 1,193 1,193 Charge-offs (138) (407) (8) (12,159) (1,513) (1,439) (70) (3,023) (13,490) (3,010) (35,257) Recoveries 400 360 107 4,156 555 1,174 52 1,106 4,546 5,378 17,834 Balance at September 30 $ 7,290 $ 23,092 $ 22,826 $ 26,772 $ 43,731 $ 25,659 $ 1,609 $ 9,183 $ 38,647 $ 25,127 $ 223,936 Nine months ended September 30, 2019 (Dollars in thousands) Construction Commercial Other Commercial Other Residential Revolving Construction Consumer PCI Total Balance at January 1 $ 35,270 $ 43,451 $ 2,481 $ 55,620 $ 2,221 $ 15,472 $ 21,862 $ 2,350 $ 35,841 $ 9,144 $ 223,712 Provision (credits) (3,217) 4,748 (230) 10,138 (618) 2,903 (272) 548 11,991 (2,277) 23,714 Charge-offs (188) (851) — (8,327) (73) (957) (1,990) — (18,017) — (30,403) Recoveries 223 502 1 1,748 685 293 1,035 — 5,315 — 9,802 Balance at September 30 $ 32,088 $ 47,850 $ 2,252 $ 59,179 $ 2,215 $ 17,711 $ 20,635 $ 2,898 $ 35,130 $ 6,867 $ 226,825 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, 2020 were as follows: (Dollars in thousands) Collateral-Dependant Loans Net Realizable Value of Collateral Collateral Coverage Allowance for Credit Losses Commercial loans: Construction and land development $ 1,425 $ 1,952 137.0 % $ — Owner occupied commercial mortgage 5,411 9,428 174.2 — Non-owner occupied commercial mortgage 7,121 10,874 152.7 — Total commercial loans 13,957 22,254 159.4 — Consumer: Residential mortgage 22,804 31,779 139.4 162 Revolving mortgage 310 315 101.6 — Total consumer loans 23,114 32,094 138.9 162 Total non-PCD loans 37,071 54,348 146.6 162 PCD 17,109 25,443 148.7 — Total collateral-dependent loans $ 54,180 $ 79,791 147.3 % $ 162 Collateral-dependent nonaccrual loans with no recorded allowance totaled $52.0 million as of September 30, 2020. All other nonaccrual loans have a recorded allowance. The following tables present the allowance and recorded investment in loans and leases by class of loans, as well as the associated impairment method at December 31, 2019: December 31, 2019 (Dollars in thousands) Construction Commercial Other Commercial Other Residential Revolving Construction Consumer Total Non-PCI Loans Allowance for loan and lease losses: ALLL for loans and leases individually evaluated for impairment $ 463 $ 3,650 $ 39 $ 1,379 $ 103 $ 3,278 $ 2,722 $ 174 $ 1,107 $ 12,915 ALLL for loans and leases collectively evaluated for impairment 32,750 41,685 2,172 57,995 2,133 14,954 16,980 2,535 33,486 204,690 Total allowance for loan and lease losses $ 33,213 $ 45,335 $ 2,211 $ 59,374 $ 2,236 $ 18,232 $ 19,702 $ 2,709 $ 34,593 $ 217,605 Loans and leases: Loans and leases individually evaluated for impairment $ 4,655 $ 70,149 $ 1,268 $ 12,182 $ 639 $ 60,442 $ 28,869 $ 3,882 $ 3,513 $ 185,599 Loans and leases collectively evaluated for impairment 1,008,799 12,212,486 540,760 4,391,610 309,454 5,233,475 2,310,203 353,503 1,776,891 28,137,181 Total loan and leases $ 1,013,454 $ 12,282,635 $ 542,028 $ 4,403,792 $ 310,093 $ 5,293,917 $ 2,339,072 $ 357,385 $ 1,780,404 $ 28,322,780 The following table presents the PCI allowance and recorded investment in loans at December 31, 2019: (Dollars in thousands) December 31, 2019 ALLL for loans acquired with deteriorated credit quality $ 7,536 Loans acquired with deteriorated credit quality 558,716 At December 31, 2019, $139.4 million of PCI loans experienced an adverse change in expected cash flows since the date of acquisition. The following tables provide information on non-PCI impaired loans and leases, exclusive of loans and leases collectively evaluated: December 31, 2019 (Dollars in thousands) With a With no Total Unpaid Related Non-PCI impaired loans and leases: Commercial: Construction and land development $ 1,851 $ 2,804 $ 4,655 $ 5,109 $ 463 Commercial mortgage 42,394 27,755 70,149 74,804 3,650 Other commercial real estate 318 950 1,268 1,360 39 Commercial and industrial and leases 7,547 4,635 12,182 13,993 1,379 Other 406 233 639 661 103 Total commercial loans 52,516 36,377 88,893 95,927 5,634 Noncommercial: Residential mortgage 48,796 11,646 60,442 64,741 3,278 Revolving mortgage 26,104 2,765 28,869 31,960 2,722 Construction and land development 2,470 1,412 3,882 4,150 174 Consumer 3,472 41 3,513 3,821 1,107 Total noncommercial loans 80,842 15,864 96,706 104,672 7,281 Total non-PCI impaired loans and leases $ 133,358 $ 52,241 $ 185,599 $ 200,599 $ 12,915 Non-PCI impaired loans less than $500,000 that were collectively evaluated for impairment totaled $41.0 million at December 31, 2019. The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the three and nine months ended September 30, 2019: Three months ended September 30, 2019 Nine months ended September 30, 2019 (Dollars in thousands) Average Interest income recognized Average Interest income recognized Non-PCI impaired loans and leases: Commercial: Construction and land development $ 6,130 $ 6 $ 3,460 $ 40 Commercial mortgage 70,351 551 61,962 1,653 Other commercial real estate 1,186 6 797 20 Commercial and industrial and leases 13,085 140 11,478 353 Other 298 2 314 6 Total commercial 91,050 705 78,011 2,072 Noncommercial: Residential mortgage 56,029 346 49,048 988 Revolving mortgage 30,067 260 29,477 763 Construction and land development 3,124 25 3,473 93 Consumer 3,443 37 3,152 97 Total noncommercial 92,663 668 85,150 1,941 Total non-PCI impaired loans and leases $ 183,713 $ 1,373 $ 163,161 $ 4,013 Troubled Debt Restructurings BancShares accounts for certain loan modifications or restructurings as 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 our allowance for credit loss models, TDRs are not individually evaluated unless determined to be collateral-dependent and 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 default status do not impact the calculation of the allowance for credit losses on TDR loans. 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 COVID-19-related financial difficulty. 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 is not recording these as TDRs. The following tables provides a summary of total TDRs by accrual status: September 30, 2020 (Dollars in thousands) Accruing Nonaccruing Total Commercial loans: Construction and land development $ 791 $ 57 $ 848 Owner occupied commercial mortgage 33,202 9,076 42,278 Non-owner occupied commercial mortgage 17,728 1,180 18,908 Commercial and industrial and leases 28,942 5,650 34,592 Total commercial loans 80,663 15,963 96,626 Consumer: Residential mortgage 33,163 17,202 50,365 Revolving mortgage 22,232 7,140 29,372 Construction and land development 2,918 272 3,190 Consumer auto 1,992 841 2,833 Consumer other 1,010 159 1,169 Total consumer loans 61,315 25,614 86,929 PCD loans 16,801 6,774 23,575 Total loans $ 158,779 $ 48,351 $ 207,130 December 31, 2019 (Dollars in thousands) Accruing Nonaccruing Total Commercial loans: Construction and land development $ 487 $ 2,279 $ 2,766 Commercial mortgage 50,819 11,116 61,935 Other commercial real estate 571 — 571 Commercial and industrial and leases 9,430 2,409 11,839 Other 320 105 425 Total commercial loans 61,627 15,909 77,536 Noncommercial: Residential mortgage 41,813 16,048 57,861 Revolving mortgage 21,032 7,367 28,399 Construction and land development 1,452 2,430 3,882 Consumer 2,826 688 3,514 Total noncommercial loans 67,123 26,533 93,656 Total loans $ 128,750 $ 42,442 $ 171,192 Total TDRs included $17.2 million of PCI TDRs at December 31, 2019. The following table provides the types of modifications designated as TDRs during the nine months ended September 30, 2020 and September 30, 2019, as well as a summary of loans modified as a TDR during the twelve month periods ended September 30, 2020 and September 30, 2019 that subsequently defaulted during the nine months ended September 30, 2020 and September 30, 2019. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 90 days past due for TDRs, foreclosure or charge-off, whichever occurs first. Three months ended September 30, 2020 Three months ended September 30, 2019 All restructurings Restructurings with payment default All restructurings Restructurings with payment default (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 6 $ 5,703 3 $ 3,730 2 $ 1,221 — $ — Loan term extension 29 2,380 18 1,755 5 2,473 — — Below market interest rate 55 15,341 26 3,170 80 4,460 34 2,034 Discharged from bankruptcy 55 1,654 22 755 55 6,097 25 2,002 Total restructurings 145 $ 25,078 69 $ 9,410 142 $ 14,251 59 $ 4,036 Nine months ended September 30, 2020 Nine months ended September 30, 2019 All restructurings Restructurings with payment default All restructurings Restructurings with payment default (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 23 $ 24,847 6 $ 6,967 6 $ 3,209 2 $ 2,064 Loan term extension 62 5,885 34 3,244 13 3,870 4 514 Below market interest rate 212 38,740 72 5,088 205 14,968 86 5,977 Discharged from bankruptcy 165 7,025 66 2,254 157 13,499 72 5,421 Total restructurings 462 $ 76,497 178 $ 17,553 381 $ 35,546 164 $ 13,976 For the nine months ended September 30, 2020 and September 30, 2019, 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
Other Real Estate Owned	Sep. 30, 2020
Banking and Thrift [Abstract]
Other Real Estate Owned	NOTE F - OTHER REAL ESTATE OWNED The following table explains changes in OREO during the nine months ended September 30, 2020 and 2019: (Dollars in thousands) OREO 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 Balance at December 31, 2018 $ 48,030 Additions 15,426 Acquired in business combinations 3,613 Sales (17,595) Write-downs/losses (3,221) Balance at September 30, 2019 $ 46,253

Servicing Rights

Servicing Rights	9 Months Ended
Servicing Rights	Sep. 30, 2020
Mortgage Servicing Rights [Abstract]
Servicing Rights	SERVICING RIGHTS Mortgage Servicing Rights Our portfolio of residential mortgage loans serviced for third parties was $3.36 billion and $3.38 billion as of September 30, 2020 and December 31, 2019, respectively. These loans are originated and sold to third parties on a non-recourse basis with servicing rights retained. The retained servicing rights were recorded as a servicing asset and are reported in other intangible assets. The associated amortization expense and any valuation allowance recognized were 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 for the three months ended September 30, 2020 and 2019 were $2.1 million and $1.9 million, respectively, and are reported in mortgage income. For the nine months ended September 30, 2020 and 2019, contractually specified mortgage servicing fees, late fees, and ancillary fees earned were $6.4 million and $5.8 million, respectively. The following table presents changes in the servicing asset during the three and nine months ended September 30, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Beginning balance $ 18,664 $ 20,665 $ 22,963 $ 21,396 Servicing rights originated 1,994 1,532 5,673 3,943 Amortization (2,208) (1,581) (6,150) (4,595) Valuation allowance (increase) decrease (305) (45) (4,341) (173) Ending balance $ 18,145 $ 20,571 $ 18,145 $ 20,571 The following table presents the activity in the servicing asset valuation allowance for the three and nine months ended September 30, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Beginning balance $ 4,258 $ 128 $ 222 $ — Valuation allowance increase (decrease) 305 45 4,341 173 Ending balance $ 4,563 $ 173 $ 4,563 $ 173 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, 2020 December 31, 2019 Discount rate - conventional fixed loans 7.68 % 8.92 % Discount rate - all loans excluding conventional fixed loans 8.68 % 9.92 % Weighted average constant prepayment rate 20.80 % 13.72 % Weighted average cost to service a loan $ 87.30 $ 87.09 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
Repurchase Agreements	Sep. 30, 2020
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 available for sale pledged as collateral under repurchase agreements was $748.1 million and $477.6 million at September 30, 2020 and December 31, 2019, respectively. At September 30, 2020, BancShares held $693.9 million of securities sold under agreements to repurchase, with overnight and continuous remaining contractual maturities, made up of $444.0 million collateralized by government agency securities and $249.9 million collateralized by commercial mortgage-backed securities. At December 31, 2019, BancShares held securities sold under agreements to repurchase of $443.0 million, with overnight and continuous remaining contractual maturities collateralized by government agency securities.

FDIC Shared-Loss Payable

FDIC Shared-Loss Payable	9 Months Ended
FDIC Shared-Loss Payable	Sep. 30, 2020
FDIC Shared-Loss Receivable [Abstract]
FDIC Shared-Loss Receivable	FDIC SHARED-LOSS PAYABLE At September 30, 2020, shared-loss protection remains for single family residential loans acquired in the amount o f $36.2 million. The shared-loss agreement for two of the FDIC-assisted transactions include a provision related to a payment that may be owed to the FDIC at the termination of the agreement if actual cumulative losses on acquired covered assets are lower than the cumulative losses originally estimated by the FDIC at the time of acquisition (the “clawback liability”) . BancShares issued a payment to the FDIC in the first quarter of 2020 for $99.5 million related to one of the transactions. The remaining clawback liability payment date is March 2021. The following table provides changes in the FDIC shared-loss payable since December 31, 2019: (Dollars in thousands) Total Balance at December 31, 2019 $ 112,395 Accretion 2,386 Payment made to the FDIC to settle shared-loss agreement (99,468) Balance at September 30, 2020 $ 15,313

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
Accumulated Other Comprehensive Income (Loss)	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Accumulated other comprehensive income (loss) included the following as of September 30, 2020 and December 31, 2019: September 30, 2020 December 31, 2019 (Dollars in thousands) Accumulated Deferred Accumulated Accumulated Deferred Accumulated Unrealized gains on securities available for sale $ 135,240 $ 31,105 $ 104,135 $ 7,522 $ 1,730 $ 5,792 Defined benefit pension items (153,104) (35,213) (117,891) (172,098) (39,583) (132,515) Total $ (17,864) $ (4,108) $ (13,756) $ (164,576) $ (37,853) $ (126,723) The following table highlights changes in accumulated other comprehensive income (loss) by component for the three and nine months ended September 30, 2020 and 2019: Three months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized losses 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 (loss) income (8,967) — 4,875 (4,092) Ending balance $ 104,135 $ — $ (117,891) $ (13,756) Three months ended September 30, 2019 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized losses on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 2,554 $ (61,979) $ (121,306) $ (180,731) Net unrealized gains arising during period 3,026 — — 3,026 Amounts reclassified from accumulated other comprehensive loss (874) 4,693 2,114 5,933 Net current period other comprehensive income 2,152 4,693 2,114 8,959 Ending balance $ 4,706 $ (57,286) $ (119,192) $ (171,772) Nine months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized losses 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) Nine months ended September 30, 2019 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized losses on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ (38,505) $ (71,149) $ (125,533) $ (235,187) Net unrealized gains arising during period 48,489 — — 48,489 Amounts reclassified from accumulated other comprehensive loss (5,278) 13,863 6,341 14,926 Net current period other comprehensive income 43,211 13,863 6,341 63,415 Ending balance $ 4,706 $ (57,286) $ (119,192) $ (171,772) The following table presents the amounts reclassified from accumulated other comprehensive income (loss) and the line item affected in the statement where net income is presented for the three and nine months ended September 30, 2020 and 2019: (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 Three months ended September 30, 2019 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 $ 1,136 Realized gains on investment securities available for sale, net (262) Income taxes $ 874 Amortization of unrealized losses on securities available for sale transferred to held to maturity $ (6,095) Net interest income 1,402 Income taxes $ (4,693) Amortization of defined benefit pension items Prior service costs $ (15) Salaries and wages Actuarial losses (2,730) Other noninterest expense (2,745) Income before income taxes 631 Income taxes $ (2,114) Total reclassifications for the period $ (5,933) 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 items Actuarial losses $ (18,994) Other 4,370 Income taxes $ (14,624) Total reclassifications for the period $ 27,704 Nine months ended September 30, 2019 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 $ 6,855 Realized gains on investment securities available for sale, net (1,577) Income taxes $ 5,278 Net income Amortization of unrealized losses on securities available for sale transferred to held to maturity $ (18,004) Net interest income 4,141 Income taxes $ (13,863) Amortization of defined benefit pension items Prior service costs $ (43) Salaries and wages Actuarial losses (8,192) Other noninterest expense (8,235) Income before income taxes 1,894 Income taxes $ (6,341) Total reclassifications for the period $ (14,926)

Estimated Fair Values

Estimated Fair Values	9 Months Ended
Estimated Fair Values	Sep. 30, 2020
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 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 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 fair value 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 is determined based on expected payments to the FDIC in accordance with the shared-loss agreements. Cash flows are 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 are 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, 2020 and December 31, 2019. 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, 2020 and December 31, 2019: (Dollars in thousands) September 30, 2020 December 31, 2019 Carrying value Fair value Carrying value Fair value Cash and due from banks $ 352,419 $ 352,419 $ 376,719 $ 376,719 Overnight investments 3,137,945 3,137,945 1,107,844 1,107,844 Investment in marketable equity securities 93,074 93,074 82,333 82,333 Investment securities available for sale 9,019,788 9,019,788 7,059,674 7,059,674 Investment securities held to maturity 747,732 761,252 30,996 30,996 Loans held for sale 120,305 120,305 67,869 67,869 Net loans and leases 32,621,208 33,269,733 28,656,355 28,878,550 Income earned not collected 151,737 151,737 123,154 123,154 Federal Home Loan Bank stock 45,392 45,392 43,039 43,039 Mortgage and other servicing rights 19,484 20,313 24,891 26,927 Deposits with no stated maturity 39,110,297 39,110,297 30,593,627 30,593,627 Time deposits 3,140,309 3,162,058 3,837,609 3,842,162 Securities sold under customer repurchase agreements 693,889 693,889 442,956 442,956 Federal Home Loan Bank borrowings 655,179 680,718 572,185 577,362 Subordinated debt 504,381 509,518 163,412 173,685 Other borrowings 92,456 92,794 148,318 149,232 FDIC shared-loss payable 15,313 15,789 112,395 114,252 Accrued interest payable 10,477 10,477 18,124 18,124 For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of September 30, 2020 and December 31, 2019: September 30, 2020 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 U.S. Treasury $ 654,762 $ — $ 654,762 $ — Government agency 654,941 — 654,941 — Residential mortgage-backed securities 6,069,668 — 6,069,668 — Commercial mortgage-backed securities 1,090,210 — 1,090,210 — Corporate bonds 550,207 — 299,493 250,714 Total investment securities available for sale $ 9,019,788 $ — $ 8,769,074 $ 250,714 Marketable equity securities $ 93,074 $ 38,192 $ 54,882 $ — Loans held for sale $ 120,305 $ — $ 120,305 $ — December 31, 2019 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 $ 409,999 $ — $ 409,999 $ — Government agency 682,772 — 682,772 — Residential mortgage-backed securities 5,267,090 — 5,267,090 — Commercial mortgage-backed securities 380,020 — 380,020 — Corporate bonds 201,566 — 131,881 69,685 State, county and municipal 118,227 — 118,227 — Total investment securities available for sale $ 7,059,674 $ — $ 6,989,989 $ 69,685 Marketable equity securities $ 82,333 $ 29,458 $ 52,875 $ — Loans held for sale $ 67,869 $ — $ 67,869 $ — The following tables summarize activity for Level 3 assets: Corporate bonds Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Beginning balance $ 169,977 $ 149,137 $ 69,685 $ 143,226 Purchases 78,000 8,000 178,595 11,991 Unrealized net gains included in other comprehensive income 2,818 1,147 901 2,985 Amounts included in net income (81) 41 (249) 123 Transfers in — — 1,782 — Ending balance $ 250,714 $ 157,325 $ 250,714 $ 157,325 During the three months ended September 30, 2020, there were no transfers between levels. During the nine months ended September 30, 2020, there were transfers from Level 2 to Level 3 of $1.8 million in corporate bonds available for sale. The transfers were due to a lack of observable inputs and trade activity for those securities. During the three and nine months ended September 30, 2019, there were no transfers between levels. The following table presents quantitative information about Level 3 fair value measurements for fair value on a recurring basis at September 30, 2020: (Dollars in thousands) September 30, 2020 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 $ 250,714 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 a gain of $567 thousand and a gain of $583 thousand for the three months ended September 30, 2020 and 2019, respectively. The changes in fair value included gains of $4.2 million and $750 thousand for the nine months ended September 30, 2020 and 2019, respectively. 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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 120,305 $ 114,100 $ 6,205 December 31, 2019 Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 67,869 $ 65,697 $ 2,172 No originated loans held for sale were 90 or more days past due or on nonaccrual status as of September 30, 2020 or December 31, 2019. We 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. Following the adoption of ASC 326, the population of loans measured at fair value on a non-recurring basis has greatly diminished and is limited to collateral-dependent loans evaluated individually. These collateral-dependent loans are deemed to be at fair value if there is an associated allowance for credit losses or if a charge-off has been recorded in the previous 12 months. Collateral values are determined using appraisals or other third-party value estimates of the subject property discounted based on estimated selling costs, generally between 6% 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 was 7.51%. Prior to the adoption of ASC 326, impaired loans were deemed to be at fair value if an associated allowance or current period charge-off had been recorded. The value of impaired loans was determined by either collateral valuations or discounted present value of the expected cash flow calculations. Collateral values were determined using appraisals or other third-party value estimates of the subject property with discounts, generally between 6% and 11%, applied for estimated selling costs and other external factors that may impact the marketability of the property. Expected cash flows were determined using expected payment information at the individual loan level, discounted using the effective interest rate. The effective interest rate for impaired loans generally ranges between 3% and 7%. 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 with discounts generally between 7% and 16% applied for estimated selling costs and other external factors that may impact the marketability of the property. At September 30, 2020, the weighted average discount applied was 8.46%. 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, 2020 and December 31, 2019: September 30, 2020 Fair value measurements using: (Dollars in thousands) Fair value Level 1 inputs Level 2 inputs Level 3 inputs Collateral-dependent loans $ 10,970 $ — $ — $ 10,970 Other real estate owned 44,557 — — 44,557 Mortgage servicing rights 16,819 — — 16,819 December 31, 2019 Fair value measurements using: Fair value Level 1 inputs Level 2 inputs Level 3 inputs Impaired loans $ 132,336 $ — $ — $ 132,336 Other real estate owned 38,310 — — 38,310 Mortgage servicing rights 3,757 — — 3,757 No financial liabilities were carried at fair value on a nonrecurring basis as of September 30, 2020 and December 31, 2019.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
Employee Benefit Plans	Sep. 30, 2020
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, 2020 and 2019, the components of net periodic benefit cost are as follows: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Service cost $ 3,570 $ 3,191 $ 10,709 $ 9,575 Interest cost 8,549 9,316 25,648 27,945 Expected return on assets (16,423) (15,647) (49,267) (46,943) Amortization of prior service cost — 15 — 43 Amortization of net actuarial loss 6,332 2,730 18,994 8,192 Net periodic cost (benefit) $ 2,028 $ (395) $ 6,084 $ (1,188) A discretionary contribution of $100.0 million was made to the pension plans during the nine months ended September 30, 2020. Management evaluates the need for its pension plan contributions on a periodic basis based upon numerous factors including, but not limited to, the funded status of the plans, returns on plan assets, discount rates and the current economic environment.

Leases

Leases	9 Months Ended
Leases	Sep. 30, 2020
Leases [Abstract]
Leases	LEASES The following table presents lease assets and liabilities as of September 30, 2020 and December 31, 2019: (Dollars in thousands) Classification September 30, 2020 December 31, 2019 Assets: Operating Other assets $ 69,968 $ 77,115 Finance Premises and equipment 7,005 8,820 Total leased assets $ 76,973 $ 85,935 Liabilities: Operating Other liabilities $ 70,129 $ 76,746 Finance Other borrowings 6,703 8,230 Total lease liabilities $ 76,832 $ 84,976
Leases	LEASES The following table presents lease assets and liabilities as of September 30, 2020 and December 31, 2019: (Dollars in thousands) Classification September 30, 2020 December 31, 2019 Assets: Operating Other assets $ 69,968 $ 77,115 Finance Premises and equipment 7,005 8,820 Total leased assets $ 76,973 $ 85,935 Liabilities: Operating Other liabilities $ 70,129 $ 76,746 Finance Other borrowings 6,703 8,230 Total lease liabilities $ 76,832 $ 84,976

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2020
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, 2020 and December 31, 2019: (Dollars in thousands) September 30, 2020 December 31, 2019 Unused commitments to extend credit $ 11,972,688 $ 10,682,378 Standby letters of credit 112,016 99,601 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 $167.0 million and $167.8 million as of September 30, 2020 and December 31, 2019, respectively, and were recorded in other assets. Unfunded commitments to fund future investments in affordable housing projects totaled $60.6 million and $70.0 million as of September 30, 2020 and December 31, 2019, 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, 2020
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, fair value measurements, and income taxes.
New Accounting Pronouncements	Recently Adopted Accounting Pronouncements Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2018-13 - Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement This ASU modifies the disclosure requirements on fair value measurements by eliminating the requirements to disclose (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy (2) the policy for timing of transfers between levels and (3) the valuation processes for Level 3 fair value measurements. This ASU also added specific disclosure requirements for fair value measurements for public business entities including the requirement to disclose the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. BancShares adopted this ASU during the first quarter of 2020 and have made all applicable updates to the disclosure within the Notes to the Unaudited Consolidated Financial Statements. FASB ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment This ASU eliminates Step 2 from the goodwill impairment test. Under Step 2, an entity had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities (including unrecognized assets and liabilities) following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Instead, under the amendments in this ASU, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative test. BancShares adopted this ASU during the first quarter 2020 with no impact to our consolidated financial position or consolidated results of operations as a result of the adoption. There was no impairment recorded as a result of our annual assessment during the third quarter of 2020. FASB ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This ASU (and all subsequent ASUs on this topic) introduce the current expected credit loss (“CECL”) model, a new credit loss methodology, replacing multiple existing impairment methods in current GAAP, which generally require that a loss be incurred before it is recognized. The amendments in this ASU require loss estimates be determined over the lifetime of the asset and broaden the information that an entity must consider in developing its expected credit losses. The ASU does not specify a method for measuring expected credit losses and allows an entity to apply methods that reasonably reflect its expectations of the credit loss estimate based on the entity's size, complexity and risk profile. In addition, the disclosures of credit quality indicators in relation to the amortized cost of financing receivables, a current disclosure requirement, are further disaggregated by year of origination. BancShares adopted this ASU (and all subsequent ASUs on this topic) as of January 1, 2020 using the modified retrospective approach for all loans, leases, debt securities designated as held to maturity, and unfunded loan commitments. BancShares adopted the ASU using the prospective approach for debt securities available for sale and purchased credit deteriorated (“PCD”) loans previously accounted for under Accounting Standard Codification (“ASC”) ASC 310-30. Results for reporting periods beginning after January 1, 2020 are presented under ASC 326, while prior period amounts continue to be reported in accordance with previously applicable GAAP. BancShares made changes to loan classifications and segmentation in order to align with ASC 326 requirements and facilitate CECL modeling. Using this updated segmentation, BancShares developed new loan level models to estimate the allowance for credit losses (“ACL”) and facilitate revised disclosures. The information presented below represents changes from Note A, Accounting Policies and Basis of Presentation, included in BancShares’ Annual Report on Form 10-K for the year ended December 31, 2019, as well as information on the impact of adoption. Accounting Policy - Debt Securities BancShares classifies debt securities as held to maturity (“HTM”) or available for sale (“AFS”). Debt securities are classified as HTM when BancShares has the intent and ability to hold the securities to maturity and are reported at amortized cost. Other debt securities are classified as AFS and reported at estimated fair value, with unrealized gains and losses, net of income taxes, reported in Accumulated Other Comprehensive Income (“AOCI”). Amortization of premiums and accretion of discounts for debt securities are included in interest income. Realized gains and losses from the sale of debt securities are determined by specific identification on a trade date basis and are included in noninterest income. BancShares performs pre-purchase due diligence and evaluates the credit risk of AFS and HTM debt securities purchased directly into our portfolio or via acquisition. If securities have evidence of more than insignificant credit deterioration since issuance, they are designated as purchased credit deteriorated (“PCD”). P CD securities are recorded at fair value at the date of acquisition which includes an associated allowance that is added to the purchase price or fair value to arrive at the Day 1 amortized cost basis. The difference between the purchase price and the Day 1 amortized cost is amortized or accreted to interest income over the contractual life of the securities using the effective interest method. For AFS securities, management performs a quarterly analysis of the investment portfolio to evaluate securities currently in an unrealized loss position for potential credit-related impairment. If BancShares intends to sell a security, or does not have the intent and ability to hold a security before recovering the amortized cost, the entirety of the unrealized loss is immediately recorded in earnings. For the remaining securities, an analysis is performed to determine if any portion of the unrealized loss recorded relates to credit impairment. If credit related impairment exists, the amount is recorded through the ACL and related provision. This review includes indicators such as changes in credit rating, delinquency, bankruptcy or other significant news event impacting the issuer. BancShares’ portfolio of HTM debt securities is made up of mortgage-backed securities issued by government agencies and government sponsored entities. Given the historically 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, we determined zero expected credit losses on the HTM portfolio. Accounting Policy - 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 as of the date of acquisition. Non-Purchased Credit Deteriorated Loans Non-Purchased Credit Deteriorated (“Non-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. Originated loans for which management has the intent and ability to hold for the foreseeable future are classified as held for investment and carried at the principal amount outstanding net of any unearned income, charge-offs and unamortized fees and costs. Nonrefundable fees collected and certain direct costs incurred related to loan originations are deferred and recorded as an adjustment to loans outstanding. The net amount of the nonrefundable fees and costs is amortized to interest income over the contractual lives using methods that approximate a constant yield. Purchased loans which do not reflect more than insignificant credit deterioration at acquisition are classified as non-PCD loans. These loans are recorded at fair value at the date of acquisition and an initial allowance is recorded on these assets as provision expense at the date of acquisition. The difference between the fair value and the unpaid principal balance at the acquisition date is amortized or accreted to interest income over the contractual life of the loan using the effective interest method. Purchased Credit Deteriorated Loans Purchased loans which reflect a more than insignificant credit deterioration since origination as of the date of acquisition are classified as PCD and are recorded at acquisition-date amortized cost, which is the purchase price or fair value in a business combination, plus our initial estimate of expected credit losses. The difference between the unpaid principal balance and the acquisition date amortized cost is amortized or accreted to interest income over the contractual life of the loan using the effective interest method. The performance of all loans within the BancShares portfolio is subject to a number of external risks, including but not limited to changes in the overall health of the economy, declines in real estate or other collateral values, changes in the demand for products and services and personal events, such as death, disability or change in marital status. BancShares evaluates and reports its non-PCD and PCD loan portfolios separately, and each non-PCD portfolio is further divided into commercial and consumer segments based on the type of borrower, purpose, collateral and/or our underlying credit management processes. Additionally, non-PCD commercial and consumer loans are assigned to loan classes, which further disaggregate the loan portfolio. PCD loans are reported as a single loan segment and class. Upon adoption of ASC 326, owner occupied and non-owner occupied commercial real estate were segregated into separate classes within the commercial segment. Similarly, consumer auto was segregated into its own class within the consumer segment. These enhancements were made to capture the unique credit characteristics used in our CECL models. Information for reporting periods beginning after January 1, 2020 are presented in accordance with ASC 326 and reflect changes to the respective classes, while prior period amounts continue to be reported in accordance with previously applicable GAAP and have not been reclassified to conform to the current financial statement presentation. The following represent our classes of loans as of January 1, 2020 upon adoption of ASC 326 (with the exception of SBA-PPP, which was added during second quarter 2020): Commercial loans and leases Construction and land development - Construction and land development consists of loans to finance land for development of commercial or residential real property and construction of multifamily apartments or other commercial properties. These loans are highly dependent on the supply and demand for commercial real estate as well as the demand for newly constructed residential homes and lots acquired for development. Deterioration in demand could result in decreased collateral values, which could make repayments of outstanding loans difficult for customers. Owner occupied commercial mortgage - Owner occupied commercial mortgages consists of loans to purchase or re-finance owner occupied nonresidential properties. This includes office buildings, other commercial facilities, and farmland. Commercial mortgages secured by owner occupied properties are primarily dependent on the ability of borrowers to achieve business results consistent with those projected at loan origination. While these loans and leases are collateralized by real property in an effort to mitigate risk, it is possible the liquidation of collateral will not fully satisfy the obligation. Non-owner occupied commercial mortgage - Non-owner occupied commercial mortgage consists of loans to purchase or refinance investment nonresidential properties. This includes office buildings and other facilities rented or leased to unrelated parties, as well as farmland and multifamily properties. The primary risk associated with income producing commercial mortgage loans is the ability of the income-producing property that collateralizes the loan to produce adequate cash flow to service the debt. While these loans and leases are collateralized by real property in an effort to mitigate risk, it is possible the liquidation of collateral will not fully satisfy the obligation. Commercial and industrial and leases - Commercial and industrial loans consist of loans or lines of credit to finance accounts receivable, inventory or other general business needs, business credit cards, and lease financing agreements for equipment, vehicles, or other assets. The primary risk associated with commercial and industrial and lease financing loans is the ability of borrowers to achieve business results consistent with those projected at origination. Failure to achieve these projections presents risk the borrower will be unable to service the debt consistent with the contractual terms of the loan or lease. SBA-PPP - These loans were originated as part of the SBA-PPP to finance payroll and other costs for nonprofit and small businesses impacted by the COVID-19 pandemic. These loans are guaranteed by the SBA and borrowers have the ability to qualify for loan forgiveness through the U.S. Treasury. Consumer loans Residential mortgage - Residential mortgage consists of loans to purchase or refinance the borrower’s primary dwelling, secondary residence or vacation home and are often secured by 1-4 family residential property. Significant and rapid declines in real estate values can result in borrowers having debt levels in excess of the current market value of the collateral. Revolving mortgage - Revolving mortgage consists of home equity lines of credit and other lines of credit secured by first or second liens on the borrower’s primary residence. These loans are secured by both senior and junior liens on the residential real estate and are particularly susceptible to declining collateral values. This risk is elevated for loans secured by junior lines as a substantial decline in value could render the junior lien position effectively unsecured. Construction and land development - Construction and land development consists of loans to construct a borrower’s primary or secondary residence or vacant land upon which the owner intends to construct a dwelling at a future date. These loans are typically secured by undeveloped or partially developed land in anticipation of completing construction of a 1-4 family residential property. There is risk these construction and development projects can experience delays and cost overruns exceeding the borrower’s financial ability to complete the project. Such cost overruns can result in foreclosure of partially completed and unmarketable collateral. Consumer auto loans - Consumer auto loans consist of installment loans to finance purchases of vehicles. These loans include direct auto loans originated in bank branches, as well indirect auto loans originated through agreements with auto dealerships. The value of the underlying collateral within this class is at risk of potential rapid depreciation which could result in unpaid balances in excess of the collateral. Other consumer - Other consumer loans consist of loans to finance unsecured home improvements, student loans and revolving lines of credit that can be secured or unsecured, including personal credit cards. The value of the underlying collateral within this class is at risk of potential rapid depreciation which could result in unpaid balances in excess of the collateral. Accounting Policy - Nonperforming Assets and Troubled Debt Restructurings Nonperforming Assets Nonperforming assets (“NPAs”) include nonaccrual loans, past due securities and foreclosed property. Foreclosed property consists of real estate and other assets acquired as a result of loan defaults and is discussed below. All loans are classified as past due when the payment of principal and interest based upon contractual terms is greater than 30 days delinquent. Loans are generally placed on nonaccrual when principal or interest becomes 90 days past due or when it is probable the principal or interest is not fully collectible. When loans are placed on nonaccrual, all previously uncollected accrued interest is reversed from interest income and the ongoing accrual of interest is discontinued. All payments received thereafter are applied as a reduction of the remaining principal balance as long as doubt exists as to the ultimate collection of the principal. Loans and leases are generally removed from nonaccrual status when they become current for a sustained period of time and there is no longer concern as to the collectability of principal and interest. Securities are also classified as past due when the payment of principal and interest based upon contractual terms is greater than 30 days delinquent. Missed interest payments on securities are rare. We review all securities with delinquent interest and immediately charge off any accrued interest determined to be uncollectible. Troubled Debt Restructurings A loan is considered a troubled debt restructuring (“TDR”) when both of the following occur: (1) a modification to a borrower’s debt agreement is made and (2) a concession is granted for economic or legal reasons related to a borrower’s financial difficulties that otherwise would not be granted. TDR concessions could include short-term deferrals of interest, modifications of payment terms, or (in certain limited instances) forgiveness of principal or interest. Loans restructured as a TDR are treated and reported as such for the remaining life of the loan. TDR loans can be nonaccrual or accrual, depending on the individual facts and circumstances of the borrower. In circumstances where a portion of the loan balance is charged-off, the remaining balance is typically classified as nonaccrual. Accounting Policy - Allowance for Credit Losses Loans Loans within the various reporting classes are segregated into pools with similar risk characteristics and models are built to estimate the ACL. These loan level ACL models estimate the probability of default and loss given default for individual loans within the risk pool based on historical loss experience, borrower characteristics, collateral type, forecasts of relevant economic conditions, expected future recoveries and other factors. Pools for estimating the ACL are aggregated into loan classes, as described above, which roll up into commercial and consumer loan segments. Non-PCD and PCD loans are modeled together within the loan level models using acquired and PCD indicator variables to provide differentiation of individual loan risk. BancShares uses a two The ACL for SBA-PPP loans originated during 2020 are separately evaluated given the explicit government guarantee. This analysis, which incorporated historical experience with similar SBA guarantees and underwriting, concluded the likelihood of loss was remote and therefore these loans were assigned a zero expected credit loss in the ACL. The ACL represents management’s best estimate of credit losses expected over the life of the loan, adjusted for expected contractual payments and the impact of prepayment expectations. Prepayment assumptions were developed through a review of BancShares’ historical prepayment activity and began with a review of prepayment assumptions utilized in other modeling activities. Estimates for loan losses are determined by analyzing quantitative and qualitative components present as of the evaluation date. Adjustments to the ACL are recorded with a corresponding entry to provision for credit losses. Loan balances considered uncollectible are charged-off against the ACL. Recoveries of amounts previously charged-off are credited to the ACL. A primary component of determining the ACL on loans is the actual net loss history of the various loan pools. For commercial pools, key factors utilized in the models include delinquency trends as well as macroeconomic variables such as unemployment and commercial real estate price index. For consumer pools, key factors include delinquency trends and the borrower’s original credit score, as well as other macroeconomic variables such as unemployment, gross domestic product, home price index, and commercial real estate index. As the models project losses over the life of the loans, prepayment assumptions also serve as significant inputs. Model outputs may be adjusted through a qualitative assessment to reflect economic conditions and trends not captured within the models including credit quality, concentrations, and significant policy and underwriting changes. Within our ACL model, TDRs meet the definition of default and are given a 100% probability of default rating. TDRs are not individually evaluated unless determined to be collateral-dependent. Therefore, loss given default is calculated based on the individual risk characteristics of the loan as defined in the model. When loans do not share risk characteristics similar to others in the pool, the ACL is evaluated on an individual basis. Given that BancShares' CECL models are loan level models, the population of loans evaluated individually is minimal and consists primarily of loans greater than $500 thousand and determined to be collateral-dependent. BancShares elected the practical expedient allowed under ASC 326 to assess the collectability of these loans, where repayment is expected to be provided substantially through operation or sale of collateral, based on the fair value of the underlying collateral. The fair value of the collateral is estimated using appraised and market values (appropriately adjusted for an assessment of the sales and marketing costs when applicable). A specific allowance is established, or partial charge-off is recorded, for the difference between the excess amortized cost of loan and the collateral’s estimated fair value. Accrued Interest Receivable BancShares has elected not to measure an ACL for accrued interest receivable and has excluded it from the amortized cost basis of loans and held to maturity debt securities as our accounting policies and credit monitoring provide that uncollectible accrued interest is reversed or written off against interest income in a timely manner. Unfunded Commitments A reserve for unfunded commitments is established for off-balance sheet exposures such as unfunded balances for existing lines of credit, commitments to extend future credit, as well as both standby and commercial letters of credit when there is a contractual obligation to extend credit and when this extension of credit is not unconditionally cancellable (i.e. commitment cannot be canceled at any time). These unfunded commitments are assessed to determine both the probability of funding as well the expectation of future losses. The expected funding balance is used in the probability of default and loss given default models to determine the reserve. The reserve for unfunded commitments was $14.0 million at September 30, 2020, and is recorded within other liabilities with changes recorded through other expense. Adoption Impact Upon adoption, BancShares recorded a net decrease of $37.9 million in the ACL which included a reduction of $56.9 million in the ACL on non-PCD loans, offset by an increase of $19.0 million in the ACL on PCD loans. The $56.9 million reduction in the ACL on non-PCD loans, as well as an $8.9 million increase in the reserve for unfunded commitments, net of deferred taxes, resulted in an increase in retained earnings of $36.9 million. The $19.0 million increase in the ACL on PCD loans was a reclassification of the PCD credit discount and resulted in a gross up of loan balances by this same amount and did not have any effect on retained earnings. Impact to total capital and capital ratios was not significant and we did not elect the capital phase-in option allowable for regulatory reporting purposes. There was no ACL recorded on debt securities held to maturity at adoption. The largest changes in the ACL, affecting beginning retained earnings as a result of the adoption, were decreases in the ACL on commercial loan segments as these portfolios have exhibited strong historical credit performance and have relatively short average lives. The reduction in ACL on these segments was partially offset by increases in ACL on our consumer loan segments primarily due to their longer average lives. The increase in the reserve for unfunded commitments was primarily due to increases in the scope of off-balance sheet exposures considered in this estimate due to the provisions in ASC 326. BancShares adopted this ASU using the prospective transition approach for PCD loans previously accounted for under ASC 310-30. In accordance with the standard, we did not assess whether purchased credit impaired (“PCI”) loans met the criteria of PCD as of the date of adoption and all loans previously classified as PCI were updated to the PCD classification. Pools utilized for PCI accounting under ASC 310-30 were dissolved upon adoption. Loans from performing PCI pools, not previously considered nonaccrual of $47.0 million, were reclassified into nonaccrual status as a result of adoption. PCD loans were assessed using the loan level probability of default and loss given default models, as well as utilizing prior specific loan reviews to inform the initial PCD loan ACL. The ACL for PCD loans increased as a result of adoption and the amortized cost basis of these loans was adjusted to reflect the transfer of this amount from credit discount to ACL. The remaining noncredit discount will be accreted into interest income at the effective interest rate as of January 1, 2020. At the date of adoption, no securities were determined to be PCD. BancShares also adopted this ASU under the prospective transition approach for debt securities available for sale. No previously recorded other than temporary impairment was reported on the portfolio of debt securities. Recently Issued Accounting Pronouncements FASB ASU 2018-14 - Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans This ASU modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by eliminating the requirement to disclose the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year and adding a requirement to disclose an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The amendments in this ASU are effective for public entities for fiscal years ending after December 15, 2020. Early adoption is permitted for all entities. BancShares will adopt all applicable amendments and update the disclosures as appropriate during the fourth quarter of 2020.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
Business Combinations (Tables)	Sep. 30, 2020
Business Combinations [Abstract]
Schedule of assets acquired and liabilities assumed	The following table provides the purchase price as of the acquisition date and the identifiable assets acquired and liabilities assumed at their estimated fair values: (Dollars in thousands) As recorded by FCB Purchase price $ 2,320 Assets Cash and due from banks $ 1,085 Overnight investments 35,129 Investment securities 30,146 Loans 133,989 Premises and equipment 7,624 Other real estate owned 9,813 Income earned not collected 558 Intangible assets 536 Other assets 2,520 Total assets acquired 221,400 Liabilities Deposits 209,340 Borrowings 9,925 Other liabilities 501 Total liabilities assumed $ 219,766 Fair value of net assets acquired 1,634 Goodwill recorded for Community Financial $ 686

Investments (Tables)

Investments (Tables)	9 Months Ended
Investments (Tables)	Sep. 30, 2020
Investments [Abstract]
Aggregate Values And Unrealized Gains And Losses Of Investment Securities	The amortized cost and fair value of investment securities at September 30, 2020 and December 31, 2019, were as follows: September 30, 2020 (Dollars in thousands) Cost Gross Gross unrealized Allowance for credit losses Fair Investment securities available for sale U.S. Treasury $ 654,588 $ 174 $ — $ — $ 654,762 Government agency 659,260 642 4,961 — 654,941 Residential mortgage-backed securities 5,968,192 101,788 312 — 6,069,668 Commercial mortgage-backed securities 1,058,640 32,004 434 — 1,090,210 Corporate bonds 543,868 9,132 2,793 — 550,207 Total investment securities available for sale $ 8,884,548 $ 143,740 $ 8,500 $ — $ 9,019,788 Investment in marketable equity securities 100,408 3,353 10,687 93,074 Investment securities held to maturity Residential mortgage-backed securities 614,489 12,905 — — 627,394 Commercial mortgage-backed securities 130,987 650 35 131,602 Other 2,256 — — — 2,256 Total investment securities held to maturity 747,732 13,555 35 — 761,252 Total investment securities $ 9,732,688 $ 160,648 $ 19,222 $ — $ 9,874,114 December 31, 2019 (Dollars in thousands) Cost Gross Gross unrealized Fair Investment securities available for sale U.S. Treasury $ 409,397 $ 602 $ — $ 409,999 Government agency 684,085 928 2,241 682,772 Residential mortgage-backed securities 5,269,060 13,417 15,387 5,267,090 Commercial mortgage-backed securities 373,105 6,974 59 380,020 Corporate bonds 198,278 3,420 132 201,566 State, county and municipal 118,227 — — 118,227 Total investment securities available for sale $ 7,052,152 $ 25,341 $ 17,819 $ 7,059,674 Investment in marketable equity securities 59,262 23,304 233 82,333 Investment securities held to maturity Other 30,996 — — 30,996 Total investment securities held to maturity 30,996 — — 30,996 Total investment securities $ 7,142,410 $ 48,645 $ 18,052 $ 7,173,003
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. September 30, 2020 December 31, 2019 (Dollars in thousands) Cost Fair Cost Fair Investment securities available for sale Non-amortizing securities maturing in: One year or less $ 655,609 $ 655,779 $ 406,325 $ 406,927 One through five years 71,262 72,446 24,496 24,971 Five through 10 years 456,620 461,847 185,209 187,868 Over 10 years 14,965 14,897 109,872 110,026 Government agency 659,260 654,941 684,085 682,772 Residential mortgage-backed securities 5,968,192 6,069,668 5,269,060 5,267,090 Commercial mortgage-backed securities 1,058,640 1,090,210 373,105 380,020 Total investment securities available for sale $ 8,884,548 $ 9,019,788 $ 7,052,152 $ 7,059,674 Investment securities held to maturity Non-amortizing securities maturing in: One year or less 1,507 1,507 30,746 30,746 One through five years 749 749 250 250 Residential mortgage-backed securities 614,489 627,394 — — Commercial mortgage-backed securities 130,987 131,602 — — Total investment securities held to maturity $ 747,732 $ 761,252 $ 30,996 $ 30,996
Available-for-sale Securities	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, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Gross realized gains on sales of investment securities available for sale $ 21,425 $ 1,326 $ 55,651 $ 7,045 Gross realized losses on sales of investment securities available for sale — 190 679 190 Net realized gains on sales of investment securities available for sale $ 21,425 $ 1,136 $ 54,972 $ 6,855
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, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Marketable equity securities (losses) gains, net $ (2,701) $ (967) $ 10,461 $ 13,505 Less net gains recognized on marketable equity securities sold 2,568 714 39,884 3,029 Unrealized gains (losses) recognized on marketable equity securities held $ (5,269) $ (1,681) $ (29,423) $ 10,476
Investment Securities With Unrealized Losses	The following table provides information regarding securities with unrealized losses as of September 30, 2020 and December 31, 2019: September 30, 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 $ 187,167 $ 2,570 $ 338,169 $ 2,391 $ 525,336 $ 4,961 Residential mortgage-backed securities 161,578 259 23,717 53 185,295 312 Commercial mortgage-backed securities 56,703 434 — — 56,703 434 Corporate bonds 81,825 2,738 4,744 55 86,569 2,793 Total $ 487,273 $ 6,001 $ 366,630 $ 2,499 $ 853,903 $ 8,500 December 31, 2019 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 $ 347,081 $ 1,827 $ 63,947 $ 414 $ 411,028 $ 2,241 Residential mortgage-backed securities 2,387,293 14,016 264,257 1,371 2,651,550 15,387 Commercial mortgage-backed securities 35,926 59 — — 35,926 59 Corporate bonds 7,714 123 4,749 9 12,463 132 Total $ 2,778,014 $ 16,025 $ 332,953 $ 1,794 $ 3,110,967 $ 17,819

Loans and Leases (Tables)

Loans and Leases (Tables)	9 Months Ended
Loans and Leases (Tables)	Sep. 30, 2020
Loans and Leases Receivable Disclosure [Abstract]
Loans And Leases Outstanding	Loans and leases outstanding included the following at September 30, 2020 and December 31, 2019: (Dollars in thousands) September 30, 2020 Commercial: Construction and land development $ 1,054,186 Owner occupied commercial mortgage 10,683,822 Non-owner occupied commercial mortgage 2,965,904 Commercial and industrial and leases 4,797,344 SBA-PPP 3,112,676 Total commercial loans 22,613,932 Consumer: Residential mortgage 5,463,646 Revolving mortgage 2,145,506 Construction and land development 347,850 Consumer auto 1,234,196 Consumer other 544,136 Total consumer loans 9,735,334 Total non-PCD loans and leases 32,349,266 PCD loans 495,878 Total loans and leases $ 32,845,144 (Dollars in thousands) December 31, 2019 Commercial: Construction and land development $ 1,013,454 Commercial mortgage 12,282,635 Other commercial real estate 542,028 Commercial and industrial and leases 4,403,792 Other 310,093 Total commercial loans 18,552,002 Noncommercial: Residential mortgage 5,293,917 Revolving mortgage 2,339,072 Construction and land development 357,385 Consumer 1,780,404 Total noncommercial loans 9,770,778 Total non-PCI loans and leases 28,322,780 PCI loans 558,716 Total loans and leases $ 28,881,496
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, 2020 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 7,860 $ — $ 1,502 $ 9,362 $ 1,044,824 $ 1,054,186 Owner occupied commercial mortgage 23,354 5,212 6,695 35,261 10,648,561 10,683,822 Non-owner occupied commercial mortgage 9,854 7,381 6,671 23,906 2,941,998 2,965,904 Commercial and industrial and leases 8,401 3,920 3,862 16,183 4,781,161 4,797,344 SBA-PPP — — — — 3,112,676 3,112,676 Total commercial loans 49,469 16,513 18,730 84,712 22,529,220 22,613,932 Consumer: Residential mortgage 37,921 5,811 36,441 80,173 5,383,473 5,463,646 Revolving mortgage 8,477 1,582 7,508 17,567 2,127,939 2,145,506 Construction and land development 923 — 312 1,235 346,615 347,850 Consumer auto 4,245 1,059 910 6,214 1,227,982 1,234,196 Consumer other 4,490 1,324 1,467 7,281 536,855 544,136 Total consumer loans 56,056 9,776 46,638 112,470 9,622,864 9,735,334 PCD loans 16,298 3,201 32,438 51,937 443,941 495,878 Total loans and leases $ 121,823 $ 29,490 $ 97,806 $ 249,119 $ 32,596,025 $ 32,845,144 December 31, 2019 (Dollars in thousands) 30-59 days 60-89 days 90 days or greater Total past Current Total loans Commercial: Construction and land development $ 3,146 $ 195 $ 2,702 $ 6,043 $ 1,007,411 $ 1,013,454 Commercial mortgage 20,389 8,774 8,319 37,482 12,245,153 12,282,635 Other commercial real estate 861 331 698 1,890 540,138 542,028 Commercial and industrial and leases 18,269 4,842 5,032 28,143 4,375,649 4,403,792 Other 51 411 126 588 309,505 310,093 Total commercial loans 42,716 14,553 16,877 74,146 18,477,856 18,552,002 Noncommercial: Residential mortgage 45,839 18,289 24,409 88,537 5,205,380 5,293,917 Revolving mortgage 9,729 3,468 9,865 23,062 2,316,010 2,339,072 Construction and land development 977 218 1,797 2,992 354,393 357,385 Consumer 10,481 3,746 3,571 17,798 1,762,606 1,780,404 Total noncommercial loans 67,026 25,721 39,642 132,389 9,638,389 9,770,778 PCI loans 26,478 10,784 28,973 66,235 492,481 558,716 Total loans and leases $ 136,220 $ 51,058 $ 85,492 $ 272,770 $ 28,608,726 $ 28,881,496 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, 2020 and December 31, 2019, were as follows: January 1, 2020 (1) September 30, 2020 (Dollars in thousands) Nonaccrual Nonaccrual Loans and Commercial: Construction and land development $ 4,281 $ 1,564 $ — Owner occupied commercial mortgage 24,476 19,567 1,288 Non-owner occupied commercial mortgage 5,965 8,258 — Commercial and industrial and leases 7,685 10,710 840 Total commercial loans 42,407 40,099 2,128 Consumer: Residential mortgage 44,357 63,646 65 Revolving mortgage 22,411 22,945 — Construction and land development 2,828 689 215 Consumer auto 2,145 2,634 — Consumer other 798 914 1,179 Total consumer loans 72,539 90,828 1,459 PCD loans 53,771 55,527 — Total loans and leases $ 168,717 $ 186,454 $ 3,587 (1) Upon the adoption of ASC 326, BancShares eliminated the pooling of PCI loans and as a result $47.0 million in additional PCD loans were recognized as nonaccrual loans at January 1, 2020. As of September 30, 2020, $27.5 million of these loans remained outstanding. December 31, 2019 (Dollars in thousands) Nonaccrual Loans and Commercial: Construction and land development $ 4,281 $ — Commercial mortgage 29,733 — Commercial and industrial and leases 7,365 1,094 Other commercial real estate 708 — Other 320 — Total commercial loans 42,407 1,094 Noncommercial: Construction and land development 2,828 — Residential mortgage 44,357 45 Revolving mortgage 22,411 — Consumer 2,943 2,152 Total noncommercial loans 72,539 2,197 PCI loans 6,743 24,257 Total loans and leases $ 121,689 $ 27,548
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, 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 $ 247,187 $ 396,322 $ 208,736 $ 132,518 $ 35,780 $ 13,144 $ 11,909 $ — $ 1,045,596 Special Mention 176 — 312 5,436 — — — — 5,924 Substandard 292 832 1,452 — 8 82 — — 2,666 Total 247,655 397,154 210,500 137,954 35,788 13,226 11,909 — 1,054,186 Owner occupied commercial mortgage Pass 2,098,636 2,218,063 1,731,557 1,423,847 1,146,027 1,714,102 101,547 135 10,433,914 Special Mention 5,578 24,032 37,273 12,246 17,433 27,905 3,313 — 127,780 Substandard 17,625 14,618 9,465 24,561 11,693 38,206 5,888 72 122,128 Total 2,121,839 2,256,713 1,778,295 1,460,654 1,175,153 1,780,213 110,748 207 10,683,822 Non-owner occupied commercial mortgage Pass 660,088 624,860 407,230 372,287 304,782 469,429 35,321 — 2,873,997 Special Mention 355 701 11,740 1,500 5,213 3,340 777 — 23,626 Substandard 2,387 19,121 12,839 6,918 10,160 14,873 1,983 — 68,281 Total 662,830 644,682 431,809 380,705 320,155 487,642 38,081 — 2,965,904 Commercial and industrial and leases Pass 1,175,036 1,090,278 562,547 361,442 267,706 352,946 809,256 5,433 4,624,644 Special Mention 3,713 17,409 8,908 5,631 3,641 4,607 13,673 216 57,798 Substandard 12,370 3,598 4,387 5,016 2,707 4,685 25,096 803 58,662 Doubtful — — — — 11 — 2 — 13 Ungraded — — — — — — 56,227 — 56,227 Total 1,191,119 1,111,285 575,842 372,089 274,065 362,238 904,254 6,452 4,797,344 SBA-PPP Pass 3,112,676 — — — — — — — 3,112,676 Total 3,112,676 — — — — — — — 3,112,676 Total commercial $ 7,336,119 $ 4,409,834 $ 2,996,446 $ 2,351,402 $ 1,805,161 $ 2,643,319 $ 1,064,992 $ 6,659 $ 22,613,932 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 $ 1,349,415 $ 1,044,542 $ 754,024 $ 677,727 $ 524,014 $ 1,006,894 $ 26,857 $ — $ 5,383,473 30-59 days 1,450 3,274 10,486 6,124 4,627 11,875 85 — 37,921 60-89 days 19 854 187 316 2,241 2,194 — — 5,811 90 days or greater 173 1,573 2,704 3,948 6,187 18,884 2,972 — 36,441 Total 1,351,057 1,050,243 767,401 688,115 537,069 1,039,847 29,914 — 5,463,646 Revolving mortgage Current — — — — — — 1,969,703 158,236 2,127,939 30-59 days — — — — — — 4,993 3,484 8,477 60-89 days — — — — — — 419 1,163 1,582 90 days or greater — — — — — — 2,449 5,059 7,508 Total — — — — — — 1,977,564 167,942 2,145,506 Construction and land development Current 144,559 140,794 29,400 13,049 6,818 3,721 8,274 — 346,615 30-59 days 250 26 466 96 17 68 — — 923 60-89 days — — — — — — — — — 90 days or greater — — — — — 97 215 — 312 Total 144,809 140,820 29,866 13,145 6,835 3,886 8,489 — 347,850 Consumer auto Current 398,216 380,919 250,602 122,352 61,076 14,817 — — 1,227,982 30-59 days 492 1,400 823 889 425 216 — — 4,245 60-89 days 120 382 224 160 164 9 — — 1,059 90 days or greater 39 306 268 191 54 52 — — 910 Total 398,867 383,007 251,917 123,592 61,719 15,094 — — 1,234,196 Consumer other Current 39,667 33,269 14,505 7,832 9,269 30,406 401,907 — 536,855 30-59 days 145 92 109 12 61 21 4,050 — 4,490 60-89 days 46 42 31 15 — — 1,190 — 1,324 90 days or greater 7 80 8 1 — — 1,371 — 1,467 Total 39,865 33,483 14,653 7,860 9,330 30,427 408,518 — 544,136 Total consumer $ 1,934,598 $ 1,607,553 $ 1,063,837 $ 832,712 $ 614,953 $ 1,089,254 $ 2,424,485 $ 167,942 $ 9,735,334 PCD loans Current $ 24,169 $ 24,565 $ 29,739 $ 34,617 $ 32,149 $ 262,095 $ 14,236 $ 22,371 $ 443,941 30-59 days 3,531 710 940 438 691 9,575 215 198 16,298 60-89 days — 337 54 155 52 2,054 218 331 3,201 90 days or greater 117 2,889 4,594 1,233 773 21,131 54 1,647 32,438 Total PCD $ 27,817 $ 28,501 $ 35,327 $ 36,443 $ 33,665 $ 294,855 $ 14,723 $ 24,547 $ 495,878 Total loans and leases $ 9,298,534 $ 6,045,888 $ 4,095,610 $ 3,220,557 $ 2,453,779 $ 4,027,428 $ 3,504,200 $ 199,148 $ 32,845,144 Loans and leases outstanding at December 31, 2019 by credit quality indicator are provided below: December 31, 2019 Commercial loans and leases (Dollars in thousands) Construction and land Commercial mortgage Other commercial real estate Commercial and industrial and leases Other PCI Total commercial loans and leases Grade: Pass $ 1,004,922 $ 12,050,799 $ 536,682 $ 4,256,456 $ 308,796 $ 148,412 $ 18,157,655 Special mention 2,577 115,164 3,899 44,604 622 44,290 166,866 Substandard 5,955 116,672 1,447 34,148 675 87,970 158,897 Doubtful — — — 3 — 3,657 3 Ungraded — — — 68,581 — — 68,581 Total $ 1,013,454 $ 12,282,635 $ 542,028 $ 4,403,792 $ 310,093 $ 284,329 $ 18,552,002 December 31, 2019 Noncommercial loans and leases (Dollars in thousands) Residential mortgage Revolving mortgage Construction and land development Consumer PCI Total noncommercial loans and leases Days past due: Current $ 5,205,380 $ 2,316,010 $ 354,393 $ 1,762,606 $ 240,995 $ 9,638,389 30-59 days past due 45,839 9,729 977 10,481 13,764 67,026 60-89 days past due 18,289 3,468 218 3,746 5,608 25,721 90 days or greater past due 24,409 9,865 1,797 3,571 14,020 39,642 Total $ 5,293,917 $ 2,339,072 $ 357,385 $ 1,780,404 $ 274,387 $ 9,770,778
Schedule Of Loans And Leases Purchased	The following table summarizes PCD loans acquired in the Community Financial transaction and provides the contractually required payments, less the initial allowance for credit losses and discount to produce the fair value of acquired loans with evidence of more than insignificant credit quality deterioration since origination at the acquisition date: (Dollars in thousands) Community Financial Contractually required payments $ 25,635 Initial PCD allowance 1,193 Discount 1,055 Fair value at acquisition date $ 23,387 The recorded fair values of purchased non-PCD loans acquired in the Community Financial transaction as of the acquisition date are as follows: (Dollars in thousands) Community Financial Commercial: Construction and land development $ 9,428 Owner occupied commercial mortgage 31,473 Non-owner occupied commercial mortgage 25,143 Commercial and industrial and leases 15,065 Total commercial loans 81,109 Consumer: Residential mortgage 21,168 Revolving mortgage 2,084 Construction and land development 5,254 Consumer auto 294 Consumer other 693 Total consumer loans 29,493 Total non-PCD loans $ 110,602

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
Allowance for Credit Losses (Tables)	Sep. 30, 2020
Receivables [Abstract]
Allowance for Loan and Lease Losses	Activity in the ACL by class of loans is summarized as follows: Three months ended September 30, 2020 (Dollars in thousands) Construction Owner occupied commercial mortgage Non-owner occupied commercial mortgage Commercial Residential Revolving Construction and land development - consumer Consumer auto Consumer other PCD Total Allowance for credit losses: Balance at July 1 $ 6,906 $ 22,489 $ 22,149 $ 24,633 $ 42,872 $ 26,640 $ 1,640 $ 8,898 $ 39,295 $ 26,928 $ 222,450 Provision (credits) 120 625 667 3,381 837 (958) (54) 708 1,341 (2,625) 4,042 Charge-offs — (87) — (3,241) (253) (359) — (824) (3,673) (495) (8,932) Recoveries 264 65 10 1,999 275 336 23 401 1,684 1,319 6,376 Balance at September 30 $ 7,290 $ 23,092 $ 22,826 $ 26,772 $ 43,731 $ 25,659 $ 1,609 $ 9,183 $ 38,647 $ 25,127 $ 223,936 Three months ended September 30, 2019 (Dollars in thousands) Construction Commercial Other Commercial Other Residential Revolving Construction Consumer PCI Total Balance at July 1 $ 31,944 $ 48,962 $ 2,342 $ 56,901 $ 2,183 $ 16,932 $ 21,121 $ 2,750 $ 35,105 $ 8,343 $ 226,583 Provision (credits) 208 (1,337) (90) 4,714 54 1,024 (153) 148 3,674 (1,476) 6,766 Charge-offs (116) (1) — (3,047) (42) (313) (534) — (5,594) — (9,647) Recoveries 52 226 — 611 20 68 201 — 1,945 — 3,123 Balance at September 30 $ 32,088 $ 47,850 $ 2,252 $ 59,179 $ 2,215 $ 17,711 $ 20,635 $ 2,898 $ 35,130 $ 6,867 $ 226,825 Nine months ended September 30, 2020 (Dollars in thousands) Construction Owner occupied commercial mortgage Non-owner occupied commercial mortgage Commercial Residential Revolving Construction and land development - consumer Consumer auto Consumer other PCD Total Balance at December 31 $ 33,213 $ 36,444 $ 11,102 $ 61,610 $ 18,232 $ 19,702 $ 2,709 $ 4,292 $ 30,301 $ 7,536 $ 225,141 Adoption of ASC 326 (31,061) (19,316) 460 (37,637) 17,118 3,665 (1,291) 1,100 10,037 19,001 (37,924) Balance at January 1 2,152 17,128 11,562 23,973 35,350 23,367 1,418 5,392 40,338 26,537 187,217 Provision (credits) 4,876 6,011 11,165 10,802 9,339 2,557 209 5,708 7,253 (4,971) 52,949 Initial allowance on PCD loans — — — — — — — — — 1,193 1,193 Charge-offs (138) (407) (8) (12,159) (1,513) (1,439) (70) (3,023) (13,490) (3,010) (35,257) Recoveries 400 360 107 4,156 555 1,174 52 1,106 4,546 5,378 17,834 Balance at September 30 $ 7,290 $ 23,092 $ 22,826 $ 26,772 $ 43,731 $ 25,659 $ 1,609 $ 9,183 $ 38,647 $ 25,127 $ 223,936 Nine months ended September 30, 2019 (Dollars in thousands) Construction Commercial Other Commercial Other Residential Revolving Construction Consumer PCI Total Balance at January 1 $ 35,270 $ 43,451 $ 2,481 $ 55,620 $ 2,221 $ 15,472 $ 21,862 $ 2,350 $ 35,841 $ 9,144 $ 223,712 Provision (credits) (3,217) 4,748 (230) 10,138 (618) 2,903 (272) 548 11,991 (2,277) 23,714 Charge-offs (188) (851) — (8,327) (73) (957) (1,990) — (18,017) — (30,403) Recoveries 223 502 1 1,748 685 293 1,035 — 5,315 — 9,802 Balance at September 30 $ 32,088 $ 47,850 $ 2,252 $ 59,179 $ 2,215 $ 17,711 $ 20,635 $ 2,898 $ 35,130 $ 6,867 $ 226,825 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, 2020 were as follows: (Dollars in thousands) Collateral-Dependant Loans Net Realizable Value of Collateral Collateral Coverage Allowance for Credit Losses Commercial loans: Construction and land development $ 1,425 $ 1,952 137.0 % $ — Owner occupied commercial mortgage 5,411 9,428 174.2 — Non-owner occupied commercial mortgage 7,121 10,874 152.7 — Total commercial loans 13,957 22,254 159.4 — Consumer: Residential mortgage 22,804 31,779 139.4 162 Revolving mortgage 310 315 101.6 — Total consumer loans 23,114 32,094 138.9 162 Total non-PCD loans 37,071 54,348 146.6 162 PCD 17,109 25,443 148.7 — Total collateral-dependent loans $ 54,180 $ 79,791 147.3 % $ 162 The following tables present the allowance and recorded investment in loans and leases by class of loans, as well as the associated impairment method at December 31, 2019: December 31, 2019 (Dollars in thousands) Construction Commercial Other Commercial Other Residential Revolving Construction Consumer Total Non-PCI Loans Allowance for loan and lease losses: ALLL for loans and leases individually evaluated for impairment $ 463 $ 3,650 $ 39 $ 1,379 $ 103 $ 3,278 $ 2,722 $ 174 $ 1,107 $ 12,915 ALLL for loans and leases collectively evaluated for impairment 32,750 41,685 2,172 57,995 2,133 14,954 16,980 2,535 33,486 204,690 Total allowance for loan and lease losses $ 33,213 $ 45,335 $ 2,211 $ 59,374 $ 2,236 $ 18,232 $ 19,702 $ 2,709 $ 34,593 $ 217,605 Loans and leases: Loans and leases individually evaluated for impairment $ 4,655 $ 70,149 $ 1,268 $ 12,182 $ 639 $ 60,442 $ 28,869 $ 3,882 $ 3,513 $ 185,599 Loans and leases collectively evaluated for impairment 1,008,799 12,212,486 540,760 4,391,610 309,454 5,233,475 2,310,203 353,503 1,776,891 28,137,181 Total loan and leases $ 1,013,454 $ 12,282,635 $ 542,028 $ 4,403,792 $ 310,093 $ 5,293,917 $ 2,339,072 $ 357,385 $ 1,780,404 $ 28,322,780 The following tables provide information on non-PCI impaired loans and leases, exclusive of loans and leases collectively evaluated: December 31, 2019 (Dollars in thousands) With a With no Total Unpaid Related Non-PCI impaired loans and leases: Commercial: Construction and land development $ 1,851 $ 2,804 $ 4,655 $ 5,109 $ 463 Commercial mortgage 42,394 27,755 70,149 74,804 3,650 Other commercial real estate 318 950 1,268 1,360 39 Commercial and industrial and leases 7,547 4,635 12,182 13,993 1,379 Other 406 233 639 661 103 Total commercial loans 52,516 36,377 88,893 95,927 5,634 Noncommercial: Residential mortgage 48,796 11,646 60,442 64,741 3,278 Revolving mortgage 26,104 2,765 28,869 31,960 2,722 Construction and land development 2,470 1,412 3,882 4,150 174 Consumer 3,472 41 3,513 3,821 1,107 Total noncommercial loans 80,842 15,864 96,706 104,672 7,281 Total non-PCI impaired loans and leases $ 133,358 $ 52,241 $ 185,599 $ 200,599 $ 12,915 Non-PCI impaired loans less than $500,000 that were collectively evaluated for impairment totaled $41.0 million at December 31, 2019. The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the three and nine months ended September 30, 2019: Three months ended September 30, 2019 Nine months ended September 30, 2019 (Dollars in thousands) Average Interest income recognized Average Interest income recognized Non-PCI impaired loans and leases: Commercial: Construction and land development $ 6,130 $ 6 $ 3,460 $ 40 Commercial mortgage 70,351 551 61,962 1,653 Other commercial real estate 1,186 6 797 20 Commercial and industrial and leases 13,085 140 11,478 353 Other 298 2 314 6 Total commercial 91,050 705 78,011 2,072 Noncommercial: Residential mortgage 56,029 346 49,048 988 Revolving mortgage 30,067 260 29,477 763 Construction and land development 3,124 25 3,473 93 Consumer 3,443 37 3,152 97 Total noncommercial 92,663 668 85,150 1,941 Total non-PCI impaired loans and leases $ 183,713 $ 1,373 $ 163,161 $ 4,013
Allocation of Allowance for Loan and Lease Losses	The following table presents the PCI allowance and recorded investment in loans at December 31, 2019: (Dollars in thousands) December 31, 2019 ALLL for loans acquired with deteriorated credit quality $ 7,536 Loans acquired with deteriorated credit quality 558,716
Troubled Debt Restructurings on Financing Receivables	The following tables provides a summary of total TDRs by accrual status: September 30, 2020 (Dollars in thousands) Accruing Nonaccruing Total Commercial loans: Construction and land development $ 791 $ 57 $ 848 Owner occupied commercial mortgage 33,202 9,076 42,278 Non-owner occupied commercial mortgage 17,728 1,180 18,908 Commercial and industrial and leases 28,942 5,650 34,592 Total commercial loans 80,663 15,963 96,626 Consumer: Residential mortgage 33,163 17,202 50,365 Revolving mortgage 22,232 7,140 29,372 Construction and land development 2,918 272 3,190 Consumer auto 1,992 841 2,833 Consumer other 1,010 159 1,169 Total consumer loans 61,315 25,614 86,929 PCD loans 16,801 6,774 23,575 Total loans $ 158,779 $ 48,351 $ 207,130 December 31, 2019 (Dollars in thousands) Accruing Nonaccruing Total Commercial loans: Construction and land development $ 487 $ 2,279 $ 2,766 Commercial mortgage 50,819 11,116 61,935 Other commercial real estate 571 — 571 Commercial and industrial and leases 9,430 2,409 11,839 Other 320 105 425 Total commercial loans 61,627 15,909 77,536 Noncommercial: Residential mortgage 41,813 16,048 57,861 Revolving mortgage 21,032 7,367 28,399 Construction and land development 1,452 2,430 3,882 Consumer 2,826 688 3,514 Total noncommercial loans 67,123 26,533 93,656 Total loans $ 128,750 $ 42,442 $ 171,192 The following table provides the types of modifications designated as TDRs during the nine months ended September 30, 2020 and September 30, 2019, as well as a summary of loans modified as a TDR during the twelve month periods ended September 30, 2020 and September 30, 2019 that subsequently defaulted during the nine months ended September 30, 2020 and September 30, 2019. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 90 days past due for TDRs, foreclosure or charge-off, whichever occurs first. Three months ended September 30, 2020 Three months ended September 30, 2019 All restructurings Restructurings with payment default All restructurings Restructurings with payment default (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 6 $ 5,703 3 $ 3,730 2 $ 1,221 — $ — Loan term extension 29 2,380 18 1,755 5 2,473 — — Below market interest rate 55 15,341 26 3,170 80 4,460 34 2,034 Discharged from bankruptcy 55 1,654 22 755 55 6,097 25 2,002 Total restructurings 145 $ 25,078 69 $ 9,410 142 $ 14,251 59 $ 4,036 Nine months ended September 30, 2020 Nine months ended September 30, 2019 All restructurings Restructurings with payment default All restructurings Restructurings with payment default (Dollars in thousands) Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Number of Loans Recorded investment at period end Loans and leases Interest only 23 $ 24,847 6 $ 6,967 6 $ 3,209 2 $ 2,064 Loan term extension 62 5,885 34 3,244 13 3,870 4 514 Below market interest rate 212 38,740 72 5,088 205 14,968 86 5,977 Discharged from bankruptcy 165 7,025 66 2,254 157 13,499 72 5,421 Total restructurings 462 $ 76,497 178 $ 17,553 381 $ 35,546 164 $ 13,976 For the nine months ended September 30, 2020 and September 30, 2019, 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
Other Real Estate Owned (Tables)	Sep. 30, 2020
Banking and Thrift [Abstract]
Changes in other real estate owned	The following table explains changes in OREO during the nine months ended September 30, 2020 and 2019: (Dollars in thousands) OREO 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 Balance at December 31, 2018 $ 48,030 Additions 15,426 Acquired in business combinations 3,613 Sales (17,595) Write-downs/losses (3,221) Balance at September 30, 2019 $ 46,253

Servicing Rights (Tables)

Servicing Rights (Tables)	9 Months Ended
Servicing Rights (Tables)	Sep. 30, 2020
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, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Beginning balance $ 18,664 $ 20,665 $ 22,963 $ 21,396 Servicing rights originated 1,994 1,532 5,673 3,943 Amortization (2,208) (1,581) (6,150) (4,595) Valuation allowance (increase) decrease (305) (45) (4,341) (173) Ending balance $ 18,145 $ 20,571 $ 18,145 $ 20,571
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, 2020 and 2019: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Beginning balance $ 4,258 $ 128 $ 222 $ — Valuation allowance increase (decrease) 305 45 4,341 173 Ending balance $ 4,563 $ 173 $ 4,563 $ 173
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, 2020 December 31, 2019 Discount rate - conventional fixed loans 7.68 % 8.92 % Discount rate - all loans excluding conventional fixed loans 8.68 % 9.92 % Weighted average constant prepayment rate 20.80 % 13.72 % Weighted average cost to service a loan $ 87.30 $ 87.09

FDIC Shared-Loss Payable (Table

FDIC Shared-Loss Payable (Tables)	9 Months Ended
FDIC Shared-Loss Payable (Tables)	Sep. 30, 2020
FDIC Shared-Loss Receivable [Abstract]
Changes In Payable to FDIC	The following table provides changes in the FDIC shared-loss payable since December 31, 2019: (Dollars in thousands) Total Balance at December 31, 2019 $ 112,395 Accretion 2,386 Payment made to the FDIC to settle shared-loss agreement (99,468) Balance at September 30, 2020 $ 15,313

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive income (loss) included the following as of September 30, 2020 and December 31, 2019: September 30, 2020 December 31, 2019 (Dollars in thousands) Accumulated Deferred Accumulated Accumulated Deferred Accumulated Unrealized gains on securities available for sale $ 135,240 $ 31,105 $ 104,135 $ 7,522 $ 1,730 $ 5,792 Defined benefit pension items (153,104) (35,213) (117,891) (172,098) (39,583) (132,515) Total $ (17,864) $ (4,108) $ (13,756) $ (164,576) $ (37,853) $ (126,723) The following table highlights changes in accumulated other comprehensive income (loss) by component for the three and nine months ended September 30, 2020 and 2019: Three months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized losses 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 (loss) income (8,967) — 4,875 (4,092) Ending balance $ 104,135 $ — $ (117,891) $ (13,756) Three months ended September 30, 2019 (Dollars in thousands, net of tax) Unrealized gains (losses) on securities available for sale Unrealized losses on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ 2,554 $ (61,979) $ (121,306) $ (180,731) Net unrealized gains arising during period 3,026 — — 3,026 Amounts reclassified from accumulated other comprehensive loss (874) 4,693 2,114 5,933 Net current period other comprehensive income 2,152 4,693 2,114 8,959 Ending balance $ 4,706 $ (57,286) $ (119,192) $ (171,772) Nine months ended September 30, 2020 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized losses 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) Nine months ended September 30, 2019 (Dollars in thousands, net of tax) Unrealized gains on securities available for sale Unrealized losses on securities available for sale transferred to held to maturity Defined benefit pension items Total Beginning balance $ (38,505) $ (71,149) $ (125,533) $ (235,187) Net unrealized gains arising during period 48,489 — — 48,489 Amounts reclassified from accumulated other comprehensive loss (5,278) 13,863 6,341 14,926 Net current period other comprehensive income 43,211 13,863 6,341 63,415 Ending balance $ 4,706 $ (57,286) $ (119,192) $ (171,772)
Reclassification out of Accumulated Other Comprehensive Income	The following table presents the amounts reclassified from accumulated other comprehensive income (loss) and the line item affected in the statement where net income is presented for the three and nine months ended September 30, 2020 and 2019: (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 Three months ended September 30, 2019 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 $ 1,136 Realized gains on investment securities available for sale, net (262) Income taxes $ 874 Amortization of unrealized losses on securities available for sale transferred to held to maturity $ (6,095) Net interest income 1,402 Income taxes $ (4,693) Amortization of defined benefit pension items Prior service costs $ (15) Salaries and wages Actuarial losses (2,730) Other noninterest expense (2,745) Income before income taxes 631 Income taxes $ (2,114) Total reclassifications for the period $ (5,933) 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 items Actuarial losses $ (18,994) Other 4,370 Income taxes $ (14,624) Total reclassifications for the period $ 27,704 Nine months ended September 30, 2019 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 $ 6,855 Realized gains on investment securities available for sale, net (1,577) Income taxes $ 5,278 Net income Amortization of unrealized losses on securities available for sale transferred to held to maturity $ (18,004) Net interest income 4,141 Income taxes $ (13,863) Amortization of defined benefit pension items Prior service costs $ (43) Salaries and wages Actuarial losses (8,192) Other noninterest expense (8,235) Income before income taxes 1,894 Income taxes $ (6,341) Total reclassifications for the period $ (14,926)

Estimated Fair Values (Tables)

Estimated Fair Values (Tables)	9 Months Ended
Estimated Fair Values (Tables)	Sep. 30, 2020
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, 2020 and December 31, 2019: (Dollars in thousands) September 30, 2020 December 31, 2019 Carrying value Fair value Carrying value Fair value Cash and due from banks $ 352,419 $ 352,419 $ 376,719 $ 376,719 Overnight investments 3,137,945 3,137,945 1,107,844 1,107,844 Investment in marketable equity securities 93,074 93,074 82,333 82,333 Investment securities available for sale 9,019,788 9,019,788 7,059,674 7,059,674 Investment securities held to maturity 747,732 761,252 30,996 30,996 Loans held for sale 120,305 120,305 67,869 67,869 Net loans and leases 32,621,208 33,269,733 28,656,355 28,878,550 Income earned not collected 151,737 151,737 123,154 123,154 Federal Home Loan Bank stock 45,392 45,392 43,039 43,039 Mortgage and other servicing rights 19,484 20,313 24,891 26,927 Deposits with no stated maturity 39,110,297 39,110,297 30,593,627 30,593,627 Time deposits 3,140,309 3,162,058 3,837,609 3,842,162 Securities sold under customer repurchase agreements 693,889 693,889 442,956 442,956 Federal Home Loan Bank borrowings 655,179 680,718 572,185 577,362 Subordinated debt 504,381 509,518 163,412 173,685 Other borrowings 92,456 92,794 148,318 149,232 FDIC shared-loss payable 15,313 15,789 112,395 114,252 Accrued interest payable 10,477 10,477 18,124 18,124
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, 2020 and December 31, 2019: September 30, 2020 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 U.S. Treasury $ 654,762 $ — $ 654,762 $ — Government agency 654,941 — 654,941 — Residential mortgage-backed securities 6,069,668 — 6,069,668 — Commercial mortgage-backed securities 1,090,210 — 1,090,210 — Corporate bonds 550,207 — 299,493 250,714 Total investment securities available for sale $ 9,019,788 $ — $ 8,769,074 $ 250,714 Marketable equity securities $ 93,074 $ 38,192 $ 54,882 $ — Loans held for sale $ 120,305 $ — $ 120,305 $ — December 31, 2019 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 $ 409,999 $ — $ 409,999 $ — Government agency 682,772 — 682,772 — Residential mortgage-backed securities 5,267,090 — 5,267,090 — Commercial mortgage-backed securities 380,020 — 380,020 — Corporate bonds 201,566 — 131,881 69,685 State, county and municipal 118,227 — 118,227 — Total investment securities available for sale $ 7,059,674 $ — $ 6,989,989 $ 69,685 Marketable equity securities $ 82,333 $ 29,458 $ 52,875 $ — Loans held for sale $ 67,869 $ — $ 67,869 $ —
Fair Value of Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following tables summarize activity for Level 3 assets: Corporate bonds Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Beginning balance $ 169,977 $ 149,137 $ 69,685 $ 143,226 Purchases 78,000 8,000 178,595 11,991 Unrealized net gains included in other comprehensive income 2,818 1,147 901 2,985 Amounts included in net income (81) 41 (249) 123 Transfers in — — 1,782 — Ending balance $ 250,714 $ 157,325 $ 250,714 $ 157,325
Fair Value Level 3 Significant Unobservable Input Assumptions	(Dollars in thousands) September 30, 2020 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 $ 250,714
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, 2020 and December 31, 2019: September 30, 2020 (Dollars in thousands) Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 120,305 $ 114,100 $ 6,205 December 31, 2019 Fair value Aggregate unpaid principal balance Difference Originated loans held for sale $ 67,869 $ 65,697 $ 2,172 No originated loans held for sale were 90 or more days past due or on nonaccrual status as of September 30, 2020 or December 31, 2019. We 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. Following the adoption of ASC 326, the population of loans measured at fair value on a non-recurring basis has greatly diminished and is limited to collateral-dependent loans evaluated individually. These collateral-dependent loans are deemed to be at fair value if there is an associated allowance for credit losses or if a charge-off has been recorded in the previous 12 months. Collateral values are determined using appraisals or other third-party value estimates of the subject property discounted based on estimated selling costs, generally between 6% 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 was 7.51%.
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, 2020 and December 31, 2019: September 30, 2020 Fair value measurements using: (Dollars in thousands) Fair value Level 1 inputs Level 2 inputs Level 3 inputs Collateral-dependent loans $ 10,970 $ — $ — $ 10,970 Other real estate owned 44,557 — — 44,557 Mortgage servicing rights 16,819 — — 16,819 December 31, 2019 Fair value measurements using: Fair value Level 1 inputs Level 2 inputs Level 3 inputs Impaired loans $ 132,336 $ — $ — $ 132,336 Other real estate owned 38,310 — — 38,310 Mortgage servicing rights 3,757 — — 3,757

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
Employee Benefit Plans (Tables)	Sep. 30, 2020
Retirement Benefits, Description [Abstract]
Schedule of Net Benefit Costs	For the three and nine months ended September 30, 2020 and 2019, the components of net periodic benefit cost are as follows: Three months ended September 30 Nine months ended September 30 (Dollars in thousands) 2020 2019 2020 2019 Service cost $ 3,570 $ 3,191 $ 10,709 $ 9,575 Interest cost 8,549 9,316 25,648 27,945 Expected return on assets (16,423) (15,647) (49,267) (46,943) Amortization of prior service cost — 15 — 43 Amortization of net actuarial loss 6,332 2,730 18,994 8,192 Net periodic cost (benefit) $ 2,028 $ (395) $ 6,084 $ (1,188)

Leases (Tables)

Leases (Tables)	9 Months Ended
Leases (Tables)	Sep. 30, 2020
Leases [Abstract]
Schedule of Operating and Finance Lease Assets and Liabilities	The following table presents lease assets and liabilities as of September 30, 2020 and December 31, 2019: (Dollars in thousands) Classification September 30, 2020 December 31, 2019 Assets: Operating Other assets $ 69,968 $ 77,115 Finance Premises and equipment 7,005 8,820 Total leased assets $ 76,973 $ 85,935 Liabilities: Operating Other liabilities $ 70,129 $ 76,746 Finance Other borrowings 6,703 8,230 Total lease liabilities $ 76,832 $ 84,976

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
Commitments and Contingencies (Tables)	Sep. 30, 2020
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, 2020 and December 31, 2019: (Dollars in thousands) September 30, 2020 December 31, 2019 Unused commitments to extend credit $ 11,972,688 $ 10,682,378 Standby letters of credit 112,016 99,601

Accounting Policies and Basis_3

Accounting Policies and Basis of Presentation Accounting Policies and Basis of Presentation (Recently Adopted Accounting Standards) (Details) - USD ($)	Mar. 12, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock issued (in shares)				339,937,000
Preferred stock, par value (in dollars per share)		$ 0.01		$ 0.01				$ 0.01
Proceeds from Issuance of Preferred Stock and Preference Stock				$ 345,000,000	$ 0
Stock repurchased during period (in shares)		117,700	295,900	813,090	744,400
Stock repurchased during period		$ 47,060,000	$ 135,400,000	$ 333,755,000	$ 325,900,000
Stock repurchased during period (in USD per share)		$ 399.82	$ 457.50	$ 410.48	$ 437.84
Forecast period (years)				2 years
Expected credit losses on SBA-PPP loans		$ 0		$ 0
Reserve for unfunded commitments		14,000,000		14,000,000
Retained earnings		3,738,417,000		3,738,417,000				$ 3,658,197,000
Allowance for credit loss		223,936,000	$ 226,825,000	223,936,000	$ 226,825,000	$ 222,450,000		225,141,000	$ 226,583,000	$ 223,712,000
Allowance for credit loss on debt securities held to maturity		0		0
Loans and leases, not acquired in a transfer accounted for as debt securities		32,349,266,000		32,349,266,000				28,322,780,000
Loans and leases		336,382,000	315,012,000	988,029,000	909,167,000
Impairment loss		0
Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans and leases, not acquired in a transfer accounted for as debt securities		22,613,932,000		22,613,932,000				$ 18,552,002,000
SBA-PPP \| Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans and leases, not acquired in a transfer accounted for as debt securities		3,112,676,000		3,112,676,000
Loans and leases		28,900,000		47,900,000
Held-to-maturity Securities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expected allowance for credit loss		0		0
Fixed-to-Floating Rate Subordinated Notes Due 2030
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument face amount		$ 350,000,000		$ 350,000,000
Interest rate (percentage)		3.375%		3.375%
Shares issued on conversion (in shares)		0.025000		0.025000
Liquidation preference per share (in USD per share)		$ 25		$ 25
Non-Cumulative Perpetual Preferred Stock, Series A
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Dividend rate (percentage)				5.375%
Preferred stock, par value (in dollars per share)		0.01		$ 0.01
Liquidation preference per share (in USD per share)		$ 1,000		$ 1,000
Depositary Shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock issued (in shares)	13,800,000
Class A Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock repurchased during period			$ 135,386,000		$ 325,916,000
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)				45,000
Number of shares authorized to be repurchased (in shares)		250,000		250,000
Cumulative effect of adoption of ASC 326
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reserve for unfunded commitments							$ 8,900,000
Retained earnings							36,900,000
Allowance for credit loss							(37,900,000)
Allowance for credit loss on debt securities held to maturity							0
Cumulative effect of adoption of ASC 326 \| Non-PCD Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss							(56,900,000)
Cumulative effect of adoption of ASC 326 \| PCD Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss							$ 19,000,000

Business Combinations - Merger

Business Combinations - Merger (Details)	Oct. 15, 2020director$ / shares	Sep. 30, 2020$ / shares	Dec. 31, 2019$ / 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
Subsequent Event
Subsequent Event [Line Items]
Number of directors \| director	14
Subsequent Event \| Class A Common Stock
Subsequent Event [Line Items]
Common stock, par value (in dollars per share)	$ 1
CIT Group Inc. \| Subsequent Event
Subsequent Event [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Number of directors \| director	3
CIT Group Inc. \| Subsequent Event \| Ellen R. Alemany [Member]
Subsequent Event [Line Items]
Number of directors \| director	1
CIT Group Inc. \| Subsequent Event \| BancShares Class A Common Stock
Subsequent Event [Line Items]
Conversion rate	0.06200
CIT Group Inc. \| Subsequent Event \| 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. \| Subsequent Event \| 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. \| Subsequent Event \| Series B Preferred Stock
Subsequent Event [Line Items]
Conversion rate	1
CIT Group Inc. \| Subsequent Event \| Series C Preferred Stock
Subsequent Event [Line Items]
Conversion rate	1
BancShares \| Subsequent Event
Subsequent Event [Line Items]
Number of directors \| director	11

Business Combinations - Narrati

Business Combinations - Narrative (Details) - USD ($) $ in Thousands	Feb. 01, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Merger-related expenses			$ 3,507	$ 3,892	$ 12,108	$ 9,695
Goodwill recorded for Community Financial			350,298		$ 350,298		$ 349,398
Premium for deposits sold (percent)					8.00%
Community Financial
Business Acquisition [Line Items]
Cash consideration	$ 2,300
Merger-related expenses			342		$ 2,100
Interest income		$ 4,100
Purchase price	2,320
Assets	221,400
PCD Loans	23,400
Non-PCD Loans	110,600
Allowance for credit losses	1,200
Deposits	209,340
Intangible assets	536
Liabilities assumed	219,766
Goodwill recorded for Community Financial	$ 686
Entegra Financial
Business Acquisition [Line Items]
Loans and leases divested			110,100		110,100
Premises and equipment divested			2,100		2,100
Deposits divested			$ 184,800		$ 184,800

Business Combinations - Assets

Business Combinations - Assets and Liabilities Assumed (Details) - USD ($) $ in Thousands	Feb. 01, 2020	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill recorded for Community Financial		$ 350,298	$ 349,398
Community Financial
Business Acquisition [Line Items]
Purchase price	$ 2,320
Cash and due from banks	1,085
Overnight investments	35,129
Investment securities	30,146
Loans	133,989
Premises and equipment	7,624
Other real estate owned	9,813
Income earned not collected	558
Intangible assets	536
Other assets	2,520
Total assets acquired	221,400
Deposits	209,340
Borrowings	9,925
Other liabilities	501
Total liabilities assumed	219,766
Fair value of net assets acquired	1,634
Goodwill recorded for Community Financial	$ 686

Investments (Aggregate Values a

Investments (Aggregate Values and Unrealized Gains and Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Investment securities available for sale
Cost	$ 8,884,548	$ 7,052,152
Gross unrealized losses	8,500	17,819
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Fair value	9,019,788	7,059,674
Investment in marketable equity securities at cost	100,408	59,262
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	3,353	23,304
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	10,687	233
Fair value	93,074	82,333
Investment securities held to maturity
Cost	747,732	30,996
Gross unrealized gains	13,555
Gross unrealized losses	35
Allowance for credit loss on debt securities held to maturity	0
Fair value	761,252	30,996
Cost	9,732,688	7,142,410
Gross unrealized gains	160,648	48,645
Gross unrealized losses	19,222	18,052
Debt Securities, Available-for-sale, Held-to-maturity and Equity Securities, Allowance for Credit Losses	0
Fair value	9,874,114	7,173,003
Investment securities available for sale at cost	8,884,548	7,052,152
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	143,740	25,341
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	8,500	17,819
Debt Securities, Available-for-sale	9,019,788	7,059,674
Interest receivable, available-for-sale debt securities	23,600
Interest receivable, held-to-maturity debt securities	1,700
U.S. Treasury
Investment securities available for sale
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Investment securities held to maturity
Investment securities available for sale at cost	654,588	409,397
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	174	602
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Debt Securities, Available-for-sale	654,762	409,999
Government agency
Investment securities available for sale
Gross unrealized losses	4,961	2,241
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Investment securities held to maturity
Investment securities available for sale at cost	659,260	684,085
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	642	928
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	4,961	2,241
Debt Securities, Available-for-sale	654,941	682,772
Residential Mortgage Backed Securities
Investment securities available for sale
Gross unrealized losses	312	15,387
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Investment securities held to maturity
Cost	614,489	0
Gross unrealized gains	12,905
Gross unrealized losses	0
Allowance for credit loss on debt securities held to maturity	0
Fair value	627,394
Investment securities available for sale at cost	5,968,192	5,269,060
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	101,788	13,417
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	312	15,387
Debt Securities, Available-for-sale	6,069,668	5,267,090
Commercial Mortgage Backed Securities
Investment securities available for sale
Cost	1,058,640	373,105
Gross unrealized gains	32,004	6,974
Gross unrealized losses	434	59
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Fair value	1,090,210	380,020
Investment securities held to maturity
Cost	130,987	0
Gross unrealized gains	650
Gross unrealized losses	35
Allowance for credit loss on debt securities held to maturity
Fair value	131,602
Residential mortgage-backed securities
Investment securities held to maturity
Cost		30,996
Gross unrealized gains		0
Gross unrealized losses		0
Fair value		30,996
Commercial mortgage-backed securities
Investment securities available for sale
Gross unrealized losses	2,793
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Investment securities held to maturity
Investment securities available for sale at cost	543,868	198,278
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	9,132	3,420
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2,793	132
Debt Securities, Available-for-sale	550,207	201,566
US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale
Cost		118,227
Gross unrealized gains		0
Gross unrealized losses		0
Fair value		118,227
Other
Investment securities held to maturity
Cost	2,256	30,996
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Allowance for credit loss on debt securities held to maturity	0
Fair value	$ 2,256	$ 30,996

Investments (Maturity Informati

Investments (Maturity Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Investment securities available for sale
Total investment securities available for sale, cost	$ 8,884,548	$ 7,052,152
Total investment securities available for sale, fair value	9,019,788	7,059,674
Investment securities held to maturity
Investment securities held to maturity at cost	747,732	30,996
Investment securities held to maturity at fair value	761,252	30,996
Investment securities available for sale at cost	8,884,548	7,052,152
Debt Securities, Available-for-sale	9,019,788	7,059,674
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	1,507	30,746
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	1,507	30,746
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	749	250
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	749	250
Debt Securities
Investment securities available for sale
Maturing in one year or less, cost	655,609	406,325
Maturing in one through five years, cost	71,262	24,496
Maturing in five through ten years, cost	456,620	185,209
Maturing in over ten years, cost	14,965	109,872
Maturing in one year or less, fair value	655,779	406,927
Maturing in one through five years, fair value	72,446	24,971
Maturing in five through ten yeas, fair value	461,847	187,868
Maturing in over ten years, fair value	14,897	110,026
Agency Securities
Investment securities held to maturity
Investment securities available for sale at cost	659,260	684,085
Debt Securities, Available-for-sale	654,941	682,772
Residential Mortgage Backed Securities
Investment securities held to maturity
Investment securities held to maturity at cost	614,489	0
Commercial mortgage-backed securities	627,394	0
Investment securities held to maturity at fair value	627,394
Investment securities available for sale at cost	5,968,192	5,269,060
Debt Securities, Available-for-sale	6,069,668	5,267,090
Commercial Mortgage Backed Securities
Investment securities available for sale
Total investment securities available for sale, cost	1,058,640	373,105
Total investment securities available for sale, fair value	1,090,210	380,020
Investment securities held to maturity
Investment securities held to maturity at cost	130,987	0
Commercial mortgage-backed securities	131,602	0
Investment securities held to maturity at fair value	$ 131,602
Residential mortgage-backed securities
Investment securities held to maturity
Investment securities held to maturity at cost		30,996
Investment securities held to maturity at fair value		$ 30,996

Investments (Available-for-sale

Investments (Available-for-sale Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Gross realized gains on sales of investment securities available for sale	$ 21,425	$ 1,326	$ 55,651	$ 7,045
Gross realized losses on sales of investment securities available for sale	0	190	679	190
Net realized gains on sales of investment securities available for sale	$ 21,425	$ 1,136	$ 54,972	$ 6,855

Investments Marketable Equity S

Investments Marketable Equity Securities Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Marketable Equity Securities Gains (Losses) [Abstract]
Marketable equity securities (losses) gains, net	$ (2,701)	$ (967)	$ 10,461	$ 13,505
Less net gains recognized on marketable equity securities sold	2,568	714	39,884	3,029
Unrealized gains (losses) recognized on marketable equity securities held	$ (5,269)	$ (1,681)	$ (29,423)	$ 10,476

Investments (Unrealized Losses)

Investments (Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Investment securities available for sale:
Fair Value, Less than 12 months	$ 487,273	$ 2,778,014
Unrealized Losses, Less than 12 months	6,001	16,025
Fair Value, 12 months or more	366,630	332,953
Unrealized Losses, Greater than 12 months	2,499	1,794
Fair Value, Total	853,903	3,110,967
Gross unrealized losses	8,500	17,819
Agency Securities
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	187,167	347,081
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,570	1,827
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	338,169	63,947
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2,391	414
Fair Value, Total	525,336	411,028
Gross unrealized losses	4,961	2,241
Residential Mortgage Backed Securities
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	161,578	2,387,293
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	259	14,016
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	23,717	264,257
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	53	1,371
Fair Value, Total	185,295	2,651,550
Gross unrealized losses	312	15,387
Commercial Mortgage Backed Securities
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	56,703	35,926
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	434	59
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Fair Value, Total	56,703	35,926
Gross unrealized losses	434	59
Corporate bonds
Investment securities available for sale:
Fair Value, Total		12,463
Gross unrealized losses		132
Corporate Bonds
Investment securities available for sale:
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	81,825	7,714
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,738	123
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,744	4,749
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	55	$ 9
Fair Value, Total	86,569
Gross unrealized losses	$ 2,793

Investments (Narrative) (Detail

Investments (Narrative) (Details) shares in Thousands	3 Months Ended		9 Months Ended
Investments (Narrative) (Details) shares in Thousands	Sep. 30, 2020USD ($)investmentinvestmentsshares	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)investmentinvestmentsshares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Schedule of Investments [Line Items]
Stock issued by Federal Home Loan Bank	$ 45,400,000		$ 45,400,000		$ 43,000,000
Non-marketable equity securities	13,500,000		13,500,000		12,500,000
Available for sale securities, realized gain (loss)	$ 21,425,000	$ 1,136,000	$ 54,972,000	$ 6,855,000
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, number of positions \| investment	38		38
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	4,480,000,000		4,480,000,000		$ 3,930,000,000
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]
Available-for-sale, securities in unrealized loss positions, number of positions, greater than or equal to one year \| investments	37		37
Corporate Bonds
Schedule of Investments [Line Items]
Available-for-sale, securities in unrealized loss positions, number of positions, greater than or equal to one year \| investments	1		1
Visa Class B Common Stock
Schedule of Investments [Line Items]
Investment owned (in shares) \| shares	354		354
Investment owned	$ 0		$ 0

Loans and Leases (Loans and Lea

Loans and Leases (Loans and Leases Outstanding) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Loans and leases, not acquired in a transfer accounted for as debt securities	$ 32,349,266	$ 28,322,780
Loans acquired with deteriorated credit quality	495,878	558,716
Total loans and leases	32,845,144	28,881,496
Commercial
Loans and leases, not acquired in a transfer accounted for as debt securities	22,613,932	18,552,002
Commercial \| Construction and land development
Loans and leases, not acquired in a transfer accounted for as debt securities	1,054,186	1,013,454
Commercial \| Owner occupied commercial mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	10,683,822
Commercial \| Non-owner occupied commercial mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	2,965,904
Commercial \| Commercial and industrial and leases
Loans and leases, not acquired in a transfer accounted for as debt securities	4,797,344	4,403,792
Commercial \| Commercial mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities		12,282,635
Commercial \| Other commercial real estate
Loans and leases, not acquired in a transfer accounted for as debt securities		542,028
Commercial \| Other
Loans and leases, not acquired in a transfer accounted for as debt securities		310,093
Commercial \| SBA-PPP
Loans and leases, not acquired in a transfer accounted for as debt securities	3,112,676
Consumer
Loans and leases, not acquired in a transfer accounted for as debt securities	9,735,334	9,770,778
Consumer \| Construction and land development
Loans and leases, not acquired in a transfer accounted for as debt securities	347,850	357,385
Consumer \| Consumer auto
Loans and leases, not acquired in a transfer accounted for as debt securities	1,234,196
Consumer \| Residential mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	5,463,646	5,293,917
Consumer \| Revolving mortgage
Loans and leases, not acquired in a transfer accounted for as debt securities	2,145,506
Consumer \| Consumer other
Loans and leases, not acquired in a transfer accounted for as debt securities	$ 544,136
Consumer \| Consumer
Loans and leases, not acquired in a transfer accounted for as debt securities		$ 1,780,404

Loans and Leases (Narrative) (D

Loans and Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Interest receivable	$ 111,800		$ 111,800
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	8,190,000		8,190,000		$ 6,570,000
Advances from Federal Home Loan Banks					563,700
Federal Home Loan Bank Advances, Current Borrowing Capacity	7,540,000		7,540,000		6,010,000
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	3,210,000		3,210,000		2,980,000
Loans held for sale	120,300		120,300		67,900
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	83,500		83,500		927
Loans and leases	336,382	$ 315,012	988,029	$ 909,167
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining	23,000		23,000		30,900
SBA-PPP
Financing Receivable, Credit Quality Indicator [Line Items]
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	76,000		76,000
PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Remaining discount	49,200		49,200		88,200
Federal Home Loan Bank of Atlanta
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Pledged as Collateral	11,810,000		11,810,000		9,410,000
Advances from Federal Home Loan Banks	652,700		652,700
Federal Reserve Bank
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Pledged as Collateral	$ 3,970,000		$ 3,970,000		$ 3,680,000

Loans and Leases (Aging Of The

Loans and Leases (Aging Of The Outstanding Loans and Leases By Class) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Past due loans	$ 249,119	$ 272,770
Current loans	32,596,025	28,608,726
Total loans and leases	32,845,144	28,881,496
Commercial
Financing Receivable, Past Due [Line Items]
Total loans and leases	22,613,932
Commercial \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,054,186
Commercial \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total loans and leases	4,797,344
Commercial \| SBA-PPP
Financing Receivable, Past Due [Line Items]
Total loans and leases	3,112,676
Consumer
Financing Receivable, Past Due [Line Items]
Total loans and leases	9,735,334
Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	347,850
Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	5,463,646
Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	2,145,506
Non-PCI Loans \| Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		74,146
Current loans		18,477,856
Total loans and leases		18,552,002
Non-PCI Loans \| Commercial \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	9,362	6,043
Current loans	1,044,824	1,007,411
Total loans and leases	1,054,186	1,013,454
Non-PCI Loans \| Commercial \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	35,261	37,482
Current loans	10,648,561	12,245,153
Total loans and leases	10,683,822	12,282,635
Non-PCI Loans \| Commercial \| Other commercial real estate
Financing Receivable, Past Due [Line Items]
Past due loans	23,906	1,890
Current loans	2,941,998	540,138
Total loans and leases	2,965,904	542,028
Non-PCI Loans \| Commercial \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	16,183	28,143
Current loans	4,781,161	4,375,649
Total loans and leases	4,797,344	4,403,792
Non-PCI Loans \| Commercial \| Other
Financing Receivable, Past Due [Line Items]
Past due loans	84,712	588
Current loans	22,529,220	309,505
Total loans and leases	22,613,932	310,093
Non-PCI Loans \| Commercial \| SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
Current loans	3,112,676
Total loans and leases	3,112,676
Non-PCI Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	112,470	132,389
Current loans	9,622,864	9,638,389
Total loans and leases	9,735,334	9,770,778
Non-PCI Loans \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	6,214	2,992
Current loans	1,227,982	354,393
Total loans and leases	1,234,196	357,385
Non-PCI Loans \| Consumer \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans		88,537
Current loans		5,205,380
Total loans and leases		5,293,917
Non-PCI Loans \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	80,173
Current loans	5,383,473
Total loans and leases	5,463,646
Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	17,567
Current loans	2,127,939
Total loans and leases	2,145,506
Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	1,235	23,062
Current loans	346,615	2,316,010
Total loans and leases	347,850	2,339,072
Non-PCI Loans \| Consumer \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	7,281	17,798
Current loans	536,855	1,762,606
Total loans and leases	544,136	1,780,404
PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	51,937	66,235
Current loans	443,941	492,481
Total loans and leases	495,878	558,716
PCD Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Current loans		240,995
30 to 59 Days past due
Financing Receivable, Past Due [Line Items]
Past due loans	121,823	136,220
30 to 59 Days past due \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	923
30 to 59 Days past due \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	37,921
30 to 59 Days past due \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	8,477
30 to 59 Days past due \| Non-PCI Loans \| Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		42,716
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	7,860	3,146
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	23,354	20,389
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Other commercial real estate
Financing Receivable, Past Due [Line Items]
Past due loans	9,854	861
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	8,401	18,269
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Other
Financing Receivable, Past Due [Line Items]
Past due loans	49,469	51
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
30 to 59 Days past due \| Non-PCI Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	56,056	67,026
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	4,245	977
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans		45,839
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	37,921
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	8,477
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	923	9,729
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	4,490	10,481
30 to 59 Days past due \| PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	16,298	26,478
Total loans and leases	16,298
30 to 59 Days past due \| PCD Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans		13,764
60 to 89 Days past due
Financing Receivable, Past Due [Line Items]
Past due loans	29,490	51,058
60 to 89 Days past due \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	0
60 to 89 Days past due \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	5,811
60 to 89 Days past due \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	1,582
60 to 89 Days past due \| Non-PCI Loans \| Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		14,553
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	0	195
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	5,212	8,774
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Other commercial real estate
Financing Receivable, Past Due [Line Items]
Past due loans	7,381	331
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	3,920	4,842
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Other
Financing Receivable, Past Due [Line Items]
Past due loans	16,513	411
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
60 to 89 Days past due \| Non-PCI Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	9,776	25,721
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	1,059	218
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans		18,289
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	5,811
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	1,582
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	0	3,468
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	1,324	3,746
60 to 89 Days past due \| PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	3,201	10,784
Total loans and leases	3,201
60 to 89 Days past due \| PCD Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans		5,608
90 Days or greater
Financing Receivable, Past Due [Line Items]
Past due loans	97,806	85,492
90 Days or greater \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total loans and leases	312
90 Days or greater \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	36,441
90 Days or greater \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Total loans and leases	7,508
90 Days or greater \| Non-PCI Loans \| Commercial
Financing Receivable, Past Due [Line Items]
Past due loans		16,877
90 Days or greater \| Non-PCI Loans \| Commercial \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	1,502	2,702
90 Days or greater \| Non-PCI Loans \| Commercial \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	6,695	8,319
90 Days or greater \| Non-PCI Loans \| Commercial \| Other commercial real estate
Financing Receivable, Past Due [Line Items]
Past due loans	6,671	698
90 Days or greater \| Non-PCI Loans \| Commercial \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due loans	3,862	5,032
90 Days or greater \| Non-PCI Loans \| Commercial \| Other
Financing Receivable, Past Due [Line Items]
Past due loans	18,730	126
90 Days or greater \| Non-PCI Loans \| Commercial \| SBA-PPP
Financing Receivable, Past Due [Line Items]
Past due loans	0
90 Days or greater \| Non-PCI Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	46,638	39,642
90 Days or greater \| Non-PCI Loans \| Consumer \| Construction and land development
Financing Receivable, Past Due [Line Items]
Past due loans	910	1,797
90 Days or greater \| Non-PCI Loans \| Consumer \| Mortgage
Financing Receivable, Past Due [Line Items]
Past due loans		24,409
90 Days or greater \| Non-PCI Loans \| Consumer \| Residential mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	36,441
90 Days or greater \| Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	7,508
90 Days or greater \| Non-PCI Loans \| Consumer \| Revolving mortgage
Financing Receivable, Past Due [Line Items]
Past due loans	312	9,865
90 Days or greater \| Non-PCI Loans \| Consumer \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans	1,467	3,571
90 Days or greater \| PCD Loans
Financing Receivable, Past Due [Line Items]
Past due loans	32,438	28,973
Total loans and leases	$ 32,438
90 Days or greater \| PCD Loans \| Consumer
Financing Receivable, Past Due [Line Items]
Past due loans		$ 14,020

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, 2020	Jan. 01, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 186,454	$ 168,717	$ 121,689
Loans and leases greater than 90 days and accruing	3,587		27,548
Non-PCI Loans \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	40,099	42,407	42,407
Loans and leases greater than 90 days and accruing	2,128		1,094
Non-PCI Loans \| Commercial \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,564	4,281	4,281
Loans and leases greater than 90 days and accruing	0		0
Non-PCI Loans \| Commercial \| Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	19,567	24,476
Loans and leases greater than 90 days and accruing	1,288
Non-PCI Loans \| Commercial \| Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	8,258	5,965
Loans and leases greater than 90 days and accruing	0
Non-PCI Loans \| Commercial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	10,710	7,685	7,365
Loans and leases greater than 90 days and accruing	840		1,094
Non-PCI Loans \| Commercial \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing			29,733
Loans and leases greater than 90 days and accruing			0
Non-PCI Loans \| Commercial \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing			708
Loans and leases greater than 90 days and accruing			0
Non-PCI Loans \| Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing			320
Loans and leases greater than 90 days and accruing			0
Non-PCI Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	90,828	72,539	72,539
Loans and leases greater than 90 days and accruing	1,459		2,197
Non-PCI Loans \| Consumer \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	689	2,828	2,828
Loans and leases greater than 90 days and accruing	215		0
Non-PCI Loans \| Consumer \| Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	63,646	44,357	44,357
Loans and leases greater than 90 days and accruing	65		45
Non-PCI Loans \| Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	22,945	22,411
Loans and leases greater than 90 days and accruing	0
Non-PCI Loans \| Consumer \| Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	2,634	2,145
Loans and leases greater than 90 days and accruing	0
Non-PCI Loans \| Consumer \| Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	914	798
Loans and leases greater than 90 days and accruing	1,179
Non-PCI Loans \| Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing			22,411
Loans and leases greater than 90 days and accruing			0
Non-PCI Loans \| Consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing			2,943
Loans and leases greater than 90 days and accruing			2,152
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	55,527	53,771	6,743
Loans and leases greater than 90 days and accruing	0		$ 24,257
Adoption of ASC 326 \| PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 27,500	$ 47,000

Loans and Leases Loans and Leas

Loans and Leases Loans and Leases (Credit Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases	$ 32,845,144	$ 28,881,496
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	7,336,119
2019	4,409,834
2018	2,996,446
2017	2,351,402
2016	1,805,161
Prior	2,643,319
Revolving loans	1,064,992
Revolving loans converted to term loans	6,659
Total loans and leases	22,613,932
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,934,598
2019	1,607,553
2018	1,063,837
2017	832,712
2016	614,953
Prior	1,089,254
Revolving loans	2,424,485
Revolving loans converted to term loans	167,942
Total loans and leases	9,735,334
Consumer And PCD Portfolio Segments
Financing Receivable, Credit Quality Indicator [Line Items]
2020	9,298,534
2019	6,045,888
2018	4,095,610
2017	3,220,557
2016	2,453,779
Prior	4,027,428
Revolving loans	3,504,200
Revolving loans converted to term loans	199,148
Total loans and leases	32,845,144
Construction and land development \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	247,655
2019	397,154
2018	210,500
2017	137,954
2016	35,788
Prior	13,226
Revolving loans	11,909
Revolving loans converted to term loans	0
Total loans and leases	1,054,186
Construction and land development \| Commercial \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	247,187
2019	396,322
2018	208,736
2017	132,518
2016	35,780
Prior	13,144
Revolving loans	11,909
Revolving loans converted to term loans	0
Total loans and leases	1,045,596
Construction and land development \| Commercial \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	176
2019	0
2018	312
2017	5,436
2016	0
Prior	0
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	5,924
Construction and land development \| Commercial \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	292
2019	832
2018	1,452
2017	0
2016	8
Prior	82
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	2,666
Construction and land development \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	144,809
2019	140,820
2018	29,866
2017	13,145
2016	6,835
Prior	3,886
Revolving loans	8,489
Revolving loans converted to term loans	0
Total loans and leases	347,850
Owner occupied commercial mortgage \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,121,839
2019	2,256,713
2018	1,778,295
2017	1,460,654
2016	1,175,153
Prior	1,780,213
Revolving loans	110,748
Revolving loans converted to term loans	207
Total loans and leases	10,683,822
Owner occupied commercial mortgage \| Commercial \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,098,636
2019	2,218,063
2018	1,731,557
2017	1,423,847
2016	1,146,027
Prior	1,714,102
Revolving loans	101,547
Revolving loans converted to term loans	135
Total loans and leases	10,433,914
Owner occupied commercial mortgage \| Commercial \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,578
2019	24,032
2018	37,273
2017	12,246
2016	17,433
Prior	27,905
Revolving loans	3,313
Revolving loans converted to term loans	0
Total loans and leases	127,780
Owner occupied commercial mortgage \| Commercial \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	17,625
2019	14,618
2018	9,465
2017	24,561
2016	11,693
Prior	38,206
Revolving loans	5,888
Revolving loans converted to term loans	72
Total loans and leases	122,128
Non-owner occupied commercial mortgage \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	662,830
2019	644,682
2018	431,809
2017	380,705
2016	320,155
Prior	487,642
Revolving loans	38,081
Revolving loans converted to term loans	0
Total loans and leases	2,965,904
Non-owner occupied commercial mortgage \| Commercial \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	660,088
2019	624,860
2018	407,230
2017	372,287
2016	304,782
Prior	469,429
Revolving loans	35,321
Revolving loans converted to term loans	0
Total loans and leases	2,873,997
Non-owner occupied commercial mortgage \| Commercial \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	355
2019	701
2018	11,740
2017	1,500
2016	5,213
Prior	3,340
Revolving loans	777
Revolving loans converted to term loans	0
Total loans and leases	23,626
Non-owner occupied commercial mortgage \| Commercial \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,387
2019	19,121
2018	12,839
2017	6,918
2016	10,160
Prior	14,873
Revolving loans	1,983
Revolving loans converted to term loans	0
Total loans and leases	68,281
Commercial and industrial \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,191,119
2019	1,111,285
2018	575,842
2017	372,089
2016	274,065
Prior	362,238
Revolving loans	904,254
Revolving loans converted to term loans	6,452
Total loans and leases	4,797,344
Commercial and industrial \| Commercial \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,175,036
2019	1,090,278
2018	562,547
2017	361,442
2016	267,706
Prior	352,946
Revolving loans	809,256
Revolving loans converted to term loans	5,433
Total loans and leases	4,624,644
Commercial and industrial \| Commercial \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,713
2019	17,409
2018	8,908
2017	5,631
2016	3,641
Prior	4,607
Revolving loans	13,673
Revolving loans converted to term loans	216
Total loans and leases	57,798
Commercial and industrial \| Commercial \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	12,370
2019	3,598
2018	4,387
2017	5,016
2016	2,707
Prior	4,685
Revolving loans	25,096
Revolving loans converted to term loans	803
Total loans and leases	58,662
Commercial and industrial \| Commercial \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	11
Prior	0
Revolving loans	2
Revolving loans converted to term loans	0
Total loans and leases	13
Commercial and industrial \| Commercial \| Ungraded
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	56,227
Revolving loans converted to term loans	0
Total loans and leases	56,227
Residential mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,351,057
2019	1,050,243
2018	767,401
2017	688,115
2016	537,069
Prior	1,039,847
Revolving loans	29,914
Revolving loans converted to term loans	0
Total loans and leases	5,463,646
Revolving mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	1,977,564
Revolving loans converted to term loans	167,942
Total loans and leases	2,145,506
Consumer auto \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	398,867
2019	383,007
2018	251,917
2017	123,592
2016	61,719
Prior	15,094
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	1,234,196
Consumer other \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	39,865
2019	33,483
2018	14,653
2017	7,860
2016	9,330
Prior	30,427
Revolving loans	408,518
Revolving loans converted to term loans	0
Total loans and leases	544,136
SBA-PPP \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,112,676
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	3,112,676
SBA-PPP \| Commercial \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,112,676
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	3,112,676
PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	27,817
2019	28,501
2018	35,327
2017	36,443
2016	33,665
Prior	294,855
Revolving loans	14,723
Revolving loans converted to term loans	24,547
Total loans and leases	495,878	$ 558,716
Current \| Construction and land development \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	144,559
2019	140,794
2018	29,400
2017	13,049
2016	6,818
Prior	3,721
Revolving loans	8,274
Revolving loans converted to term loans	0
Total loans and leases	346,615
Current \| Residential mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,349,415
2019	1,044,542
2018	754,024
2017	677,727
2016	524,014
Prior	1,006,894
Revolving loans	26,857
Revolving loans converted to term loans	0
Total loans and leases	5,383,473
Current \| Revolving mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	1,969,703
Revolving loans converted to term loans	158,236
Total loans and leases	2,127,939
Current \| Consumer auto \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	398,216
2019	380,919
2018	250,602
2017	122,352
2016	61,076
Prior	14,817
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	1,227,982
Current \| Consumer other \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	39,667
2019	33,269
2018	14,505
2017	7,832
2016	9,269
Prior	30,406
Revolving loans	401,907
Revolving loans converted to term loans	0
Total loans and leases	536,855
Current \| PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	24,169
2019	24,565
2018	29,739
2017	34,617
2016	32,149
Prior	262,095
Revolving loans	14,236
Revolving loans converted to term loans	22,371
Total loans and leases	443,941
30 to 59 Days past due \| Construction and land development \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	250
2019	26
2018	466
2017	96
2016	17
Prior	68
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	923
30 to 59 Days past due \| Residential mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,450
2019	3,274
2018	10,486
2017	6,124
2016	4,627
Prior	11,875
Revolving loans	85
Revolving loans converted to term loans	0
Total loans and leases	37,921
30 to 59 Days past due \| Revolving mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	4,993
Revolving loans converted to term loans	3,484
Total loans and leases	8,477
30 to 59 Days past due \| Consumer auto \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	492
2019	1,400
2018	823
2017	889
2016	425
Prior	216
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	4,245
30 to 59 Days past due \| Consumer other \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	145
2019	92
2018	109
2017	12
2016	61
Prior	21
Revolving loans	4,050
Revolving loans converted to term loans	0
Total loans and leases	4,490
30 to 59 Days past due \| PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,531
2019	710
2018	940
2017	438
2016	691
Prior	9,575
Revolving loans	215
Revolving loans converted to term loans	198
Total loans and leases	16,298
60 to 89 Days past due \| Construction and land development \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	0
60 to 89 Days past due \| Residential mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	19
2019	854
2018	187
2017	316
2016	2,241
Prior	2,194
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	5,811
60 to 89 Days past due \| Revolving mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	419
Revolving loans converted to term loans	1,163
Total loans and leases	1,582
60 to 89 Days past due \| Consumer auto \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	120
2019	382
2018	224
2017	160
2016	164
Prior	9
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	1,059
60 to 89 Days past due \| Consumer other \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	46
2019	42
2018	31
2017	15
2016	0
Prior	0
Revolving loans	1,190
Revolving loans converted to term loans	0
Total loans and leases	1,324
60 to 89 Days past due \| PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	337
2018	54
2017	155
2016	52
Prior	2,054
Revolving loans	218
Revolving loans converted to term loans	331
Total loans and leases	3,201
90 Days or greater \| Construction and land development \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	97
Revolving loans	215
Revolving loans converted to term loans	0
Total loans and leases	312
90 Days or greater \| Residential mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	173
2019	1,573
2018	2,704
2017	3,948
2016	6,187
Prior	18,884
Revolving loans	2,972
Revolving loans converted to term loans	0
Total loans and leases	36,441
90 Days or greater \| Revolving mortgage \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	2,449
Revolving loans converted to term loans	5,059
Total loans and leases	7,508
90 Days or greater \| Consumer auto \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	39
2019	306
2018	268
2017	191
2016	54
Prior	52
Revolving loans	0
Revolving loans converted to term loans	0
Total loans and leases	910
90 Days or greater \| Consumer other \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	7
2019	80
2018	8
2017	1
2016	0
Prior	0
Revolving loans	1,371
Revolving loans converted to term loans	0
Total loans and leases	1,467
90 Days or greater \| PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	117
2019	2,889
2018	4,594
2017	1,233
2016	773
Prior	21,131
Revolving loans	54
Revolving loans converted to term loans	1,647
Total loans and leases	$ 32,438

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, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	$ 32,349,266	$ 28,322,780
Past due loans	249,119	272,770
Current loans	32,596,025	28,608,726
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	22,613,932	18,552,002
Commercial \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		12,282,635
Commercial \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		542,028
Commercial \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	4,797,344	4,403,792
Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		310,093
Commercial \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,054,186	1,013,454
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	9,735,334	9,770,778
Consumer \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	347,850	357,385
Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		2,339,072
Consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		1,780,404
Non-PCI Loans \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		18,552,002
Past due loans		74,146
Current loans		18,477,856
Non-PCI Loans \| Commercial \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		12,282,635
Past due loans	35,261	37,482
Current loans	10,648,561	12,245,153
Non-PCI Loans \| Commercial \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		542,028
Past due loans	23,906	1,890
Current loans	2,941,998	540,138
Non-PCI Loans \| Commercial \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		4,403,792
Past due loans	16,183	28,143
Current loans	4,781,161	4,375,649
Non-PCI Loans \| Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		310,093
Past due loans	84,712	588
Current loans	22,529,220	309,505
Non-PCI Loans \| Commercial \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		1,013,454
Past due loans	9,362	6,043
Current loans	1,044,824	1,007,411
Non-PCI Loans \| Commercial \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		18,157,655
Non-PCI Loans \| Commercial \| Pass \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		12,050,799
Non-PCI Loans \| Commercial \| Pass \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		536,682
Non-PCI Loans \| Commercial \| Pass \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		4,256,456
Non-PCI Loans \| Commercial \| Pass \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		308,796
Non-PCI Loans \| Commercial \| Pass \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		1,004,922
Non-PCI Loans \| Commercial \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		166,866
Non-PCI Loans \| Commercial \| Special Mention \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		115,164
Non-PCI Loans \| Commercial \| Special Mention \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		3,899
Non-PCI Loans \| Commercial \| Special Mention \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		44,604
Non-PCI Loans \| Commercial \| Special Mention \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		622
Non-PCI Loans \| Commercial \| Special Mention \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		2,577
Non-PCI Loans \| Commercial \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		158,897
Non-PCI Loans \| Commercial \| Substandard \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		116,672
Non-PCI Loans \| Commercial \| Substandard \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		1,447
Non-PCI Loans \| Commercial \| Substandard \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		34,148
Non-PCI Loans \| Commercial \| Substandard \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		675
Non-PCI Loans \| Commercial \| Substandard \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		5,955
Non-PCI Loans \| Commercial \| Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		3
Non-PCI Loans \| Commercial \| Doubtful \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Doubtful \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Doubtful \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		3
Non-PCI Loans \| Commercial \| Doubtful \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Doubtful \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Ungraded
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		68,581
Non-PCI Loans \| Commercial \| Ungraded \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Ungraded \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Ungraded \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		68,581
Non-PCI Loans \| Commercial \| Ungraded \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Commercial \| Ungraded \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
Non-PCI Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		9,770,778
Past due loans	112,470	132,389
Current loans	9,622,864	9,638,389
Non-PCI Loans \| Consumer \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		5,293,917
Past due loans		88,537
Current loans		5,205,380
Non-PCI Loans \| Consumer \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		357,385
Past due loans	6,214	2,992
Current loans	1,227,982	354,393
Non-PCI Loans \| Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		2,339,072
Past due loans	1,235	23,062
Current loans	346,615	2,316,010
Non-PCI Loans \| Consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		1,780,404
Past due loans	7,281	17,798
Current loans	536,855	1,762,606
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	51,937	66,235
Current loans	443,941	492,481
PCD Loans \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		284,329
PCD Loans \| Commercial \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		148,412
PCD Loans \| Commercial \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		44,290
PCD Loans \| Commercial \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		87,970
PCD Loans \| Commercial \| Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		3,657
PCD Loans \| Commercial \| Ungraded
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		0
PCD Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans		274,387
Current loans		240,995
30 to 59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	121,823	136,220
30 to 59 Days past due \| Non-PCI Loans \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		42,716
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	23,354	20,389
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	9,854	861
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	8,401	18,269
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	49,469	51
30 to 59 Days past due \| Non-PCI Loans \| Commercial \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	7,860	3,146
30 to 59 Days past due \| Non-PCI Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	56,056	67,026
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		45,839
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	4,245	977
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	923	9,729
30 to 59 Days past due \| Non-PCI Loans \| Consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	4,490	10,481
30 to 59 Days past due \| PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	16,298	26,478
30 to 59 Days past due \| PCD Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		13,764
60 to 89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	29,490	51,058
60 to 89 Days past due \| Non-PCI Loans \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		14,553
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	5,212	8,774
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	7,381	331
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,920	4,842
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	16,513	411
60 to 89 Days past due \| Non-PCI Loans \| Commercial \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	0	195
60 to 89 Days past due \| Non-PCI Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	9,776	25,721
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		18,289
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,059	218
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	0	3,468
60 to 89 Days past due \| Non-PCI Loans \| Consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,324	3,746
60 to 89 Days past due \| PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,201	10,784
60 to 89 Days past due \| PCD Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		5,608
90 Days or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	97,806	85,492
90 Days or greater \| Non-PCI Loans \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		16,877
90 Days or greater \| Non-PCI Loans \| Commercial \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	6,695	8,319
90 Days or greater \| Non-PCI Loans \| Commercial \| Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	6,671	698
90 Days or greater \| Non-PCI Loans \| Commercial \| Commercial and industrial and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,862	5,032
90 Days or greater \| Non-PCI Loans \| Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	18,730	126
90 Days or greater \| Non-PCI Loans \| Commercial \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,502	2,702
90 Days or greater \| Non-PCI Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	46,638	39,642
90 Days or greater \| Non-PCI Loans \| Consumer \| Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		24,409
90 Days or greater \| Non-PCI Loans \| Consumer \| Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	910	1,797
90 Days or greater \| Non-PCI Loans \| Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	312	9,865
90 Days or greater \| Non-PCI Loans \| Consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,467	3,571
90 Days or greater \| PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	$ 32,438	28,973
90 Days or greater \| PCD Loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		$ 14,020

Loans and Leases (Purchased Loa

Loans and Leases (Purchased Loans and Leases) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)
Business Acquisition [Line Items]
Initial PCD allowance	$ 1,193
Discount	1,055
Community Financial
Business Acquisition [Line Items]
Contractually required payments	25,635
Initial PCD allowance	1,193
Fair value at acquisition date	23,387
Non-PCD loans purchased	110,602
Commercial \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	81,109
Consumer \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	29,493
Construction and land development \| Commercial
Business Acquisition [Line Items]
Initial PCD allowance	0
Construction and land development \| Commercial \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	9,428
Construction and land development \| Consumer
Business Acquisition [Line Items]
Initial PCD allowance	0
Construction and land development \| Consumer \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	5,254
Owner occupied commercial mortgage \| Commercial
Business Acquisition [Line Items]
Initial PCD allowance	0
Owner occupied commercial mortgage \| Commercial \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	31,473
Non-owner occupied commercial mortgage \| Commercial
Business Acquisition [Line Items]
Initial PCD allowance	0
Non-owner occupied commercial mortgage \| Commercial \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	25,143
Commercial and industrial \| Commercial
Business Acquisition [Line Items]
Initial PCD allowance	0
Commercial and industrial \| Commercial \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	15,065
Residential mortgage \| Consumer
Business Acquisition [Line Items]
Initial PCD allowance	0
Residential mortgage \| Consumer \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	21,168
Revolving mortgage \| Consumer
Business Acquisition [Line Items]
Initial PCD allowance	0
Revolving mortgage \| Consumer \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	2,084
Consumer auto \| Consumer
Business Acquisition [Line Items]
Initial PCD allowance	0
Consumer auto \| Consumer \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	294
Consumer other \| Consumer
Business Acquisition [Line Items]
Initial PCD allowance	0
Consumer other \| Consumer \| Community Financial
Business Acquisition [Line Items]
Non-PCD loans purchased	$ 693

Allowance for Credit Losses (Su

Allowance for Credit Losses (Summary of Activity In Allowance for Loan and Lease Losses) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Jan. 01, 2020
Receivables [Abstract]
Expected credit losses on SBA-PPP loans					$ 0
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	$ 223,936,000	$ 226,825,000	$ 225,141,000	$ 226,825,000	223,936,000
Decrease in allowance due to COVID-19			$ 36,100,000
Forecast period (years)			2 years
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	222,450,000	226,583,000	$ 225,141,000	223,712,000
Provision (credits)	4,042,000	6,766,000	52,949,000	23,714,000
Initial PCD allowance			1,193,000
Charge-offs	(8,932,000)	(9,647,000)	(35,257,000)	(30,403,000)
Recoveries	6,376,000	3,123,000	17,834,000	9,802,000
Ending balance	223,936,000	226,825,000	223,936,000	226,825,000
Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			(37,924,000)			$ (37,900,000)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(37,924,000)
Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			187,217,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			187,217,000
Commercial \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	7,290,000	32,088,000	7,290,000	35,270,000	7,290,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,906,000	31,944,000	33,213,000	35,270,000
Provision (credits)	120,000	208,000	4,876,000	(3,217,000)
Initial PCD allowance			0
Charge-offs	0	(116,000)	(138,000)	(188,000)
Recoveries	264,000	52,000	400,000	223,000
Ending balance	7,290,000	32,088,000	7,290,000	32,088,000
Commercial \| Construction and land development \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			(31,061,000)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(31,061,000)
Commercial \| Construction and land development \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			2,152,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			2,152,000
Commercial \| Owner occupied commercial mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	23,092,000		23,092,000		23,092,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	22,489,000		36,444,000
Provision (credits)	625,000		6,011,000
Initial PCD allowance			0
Charge-offs	(87,000)		(407,000)
Recoveries	65,000		360,000
Ending balance	23,092,000		23,092,000
Commercial \| Owner occupied commercial mortgage \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			(19,316,000)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(19,316,000)
Commercial \| Owner occupied commercial mortgage \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			17,128,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			17,128,000
Commercial \| Non-owner occupied commercial mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	22,826,000		22,826,000		22,826,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	22,149,000		11,102,000
Provision (credits)	667,000		11,165,000
Initial PCD allowance			0
Charge-offs	0		(8,000)
Recoveries	10,000		107,000
Ending balance	22,826,000		22,826,000
Commercial \| Non-owner occupied commercial mortgage \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			460,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			460,000
Commercial \| Non-owner occupied commercial mortgage \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			11,562,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			11,562,000
Commercial \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	26,772,000	59,179,000	26,772,000	59,179,000	26,772,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	24,633,000	56,901,000	61,610,000	55,620,000
Provision (credits)	3,381,000	4,714,000	10,802,000	10,138,000
Initial PCD allowance			0
Charge-offs	(3,241,000)	(3,047,000)	(12,159,000)	(8,327,000)
Recoveries	1,999,000	611,000	4,156,000	1,748,000
Ending balance	26,772,000	59,179,000	26,772,000	59,179,000
Commercial \| Commercial and industrial \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			(37,637,000)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(37,637,000)
Commercial \| Commercial and industrial \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			23,973,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			23,973,000
Commercial \| Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance		2,215,000		2,215,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		2,183,000		2,221,000
Provision (credits)		54,000		(618,000)
Charge-offs		(42,000)		(73,000)
Recoveries		20,000		685,000
Ending balance		2,215,000		2,215,000
Commercial \| Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance		47,850,000		43,451,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		48,962,000		43,451,000
Provision (credits)		(1,337,000)		4,748,000
Charge-offs		(1,000)		(851,000)
Recoveries		226,000		502,000
Ending balance		47,850,000		47,850,000
Commercial \| Other commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance		2,252,000		2,481,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		2,342,000		2,481,000
Provision (credits)		(90,000)		(230,000)
Charge-offs		0		0
Recoveries		0		1,000
Ending balance		2,252,000		2,252,000
Consumer \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	1,609,000	2,898,000	1,609,000	2,898,000	1,609,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,640,000	2,750,000	2,709,000	2,350,000
Provision (credits)	(54,000)	148,000	209,000	548,000
Initial PCD allowance			0
Charge-offs	0	0	(70,000)	0
Recoveries	23,000	0	52,000	0
Ending balance	1,609,000	2,898,000	1,609,000	2,898,000
Consumer \| Construction and land development \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			(1,291,000)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(1,291,000)
Consumer \| Construction and land development \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			1,418,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			1,418,000
Consumer \| Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	43,731,000	17,711,000	43,731,000	17,711,000	43,731,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	42,872,000	16,932,000	18,232,000	15,472,000
Provision (credits)	837,000	1,024,000	9,339,000	2,903,000
Initial PCD allowance			0
Charge-offs	(253,000)	(313,000)	(1,513,000)	(957,000)
Recoveries	275,000	68,000	555,000	293,000
Ending balance	43,731,000	17,711,000	43,731,000	17,711,000
Consumer \| Residential mortgage \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			17,118,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			17,118,000
Consumer \| Residential mortgage \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			35,350,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			35,350,000
Consumer \| Revolving mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	25,659,000	20,635,000	25,659,000	20,635,000	25,659,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	26,640,000	21,121,000	19,702,000	21,862,000
Provision (credits)	(958,000)	(153,000)	2,557,000	(272,000)
Initial PCD allowance			0
Charge-offs	(359,000)	(534,000)	(1,439,000)	(1,990,000)
Recoveries	336,000	201,000	1,174,000	1,035,000
Ending balance	25,659,000	20,635,000	25,659,000	20,635,000
Consumer \| Revolving mortgage \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			3,665,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			3,665,000
Consumer \| Revolving mortgage \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			23,367,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			23,367,000
Consumer \| Consumer auto
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	9,183,000		9,183,000		9,183,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,898,000		4,292,000
Provision (credits)	708,000		5,708,000
Initial PCD allowance			0
Charge-offs	(824,000)		(3,023,000)
Recoveries	401,000		1,106,000
Ending balance	9,183,000		9,183,000
Consumer \| Consumer auto \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			1,100,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			1,100,000
Consumer \| Consumer auto \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			5,392,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			5,392,000
Consumer \| Consumer other
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	38,647,000		38,647,000		38,647,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	39,295,000		30,301,000
Provision (credits)	1,341,000		7,253,000
Initial PCD allowance			0
Charge-offs	(3,673,000)		(13,490,000)
Recoveries	1,684,000		4,546,000
Ending balance	38,647,000		38,647,000
Consumer \| Consumer other \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			10,037,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			10,037,000
Consumer \| Consumer other \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			40,338,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			40,338,000
Consumer \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance		35,130,000		35,130,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		35,105,000		35,841,000
Provision (credits)		3,674,000		11,991,000
Charge-offs		(5,594,000)		(18,017,000)
Recoveries		1,945,000		5,315,000
Ending balance		35,130,000		35,130,000
Non-PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			217,605,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			217,605,000
Non-PCD Loans \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance						(56,900,000)
Non-PCD Loans \| Commercial \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			33,213,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			33,213,000
Non-PCD Loans \| Commercial \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			59,374,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			59,374,000
Non-PCD Loans \| Commercial \| Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			2,236,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			2,236,000
Non-PCD Loans \| Commercial \| Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			45,335,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			45,335,000
Non-PCD Loans \| Commercial \| Other commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			2,211,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			2,211,000
Non-PCD Loans \| Consumer \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			2,709,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			2,709,000
Non-PCD Loans \| Consumer \| Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			18,232,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			18,232,000
Non-PCD Loans \| Consumer \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			34,593,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			34,593,000
PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	25,127,000	6,867,000	25,127,000	6,867,000	$ 25,127,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	26,928,000	8,343,000	7,536,000	9,144,000
Provision (credits)	(2,625,000)	(1,476,000)	(4,971,000)	(2,277,000)
Initial PCD allowance			1,193,000
Charge-offs	(495,000)	0	(3,010,000)	0
Recoveries	1,319,000	0	5,378,000	0
Ending balance	$ 25,127,000	$ 6,867,000	25,127,000	$ 6,867,000
PCD Loans \| Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			19,001,000			$ 19,000,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			19,001,000
PCD Loans \| Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance			26,537,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			$ 26,537,000

Allowance for Credit Losses (Co

Allowance for Credit Losses (Collateral Dependent Loans) (Details)	Sep. 30, 2020USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold balance for collateral-dependent loans to be individually reviewed for impairment	$ 500,000
Collateral-Dependant Loans	54,180,000
Net Realizable Value of Collateral	$ 79,791,000
Collateral Coverage	147.30%
Allowance for Credit Losses	$ 162,000
Collateral-dependent nonaccrual loans with no allowance	52,000,000
Non-PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	37,071,000
Net Realizable Value of Collateral	$ 54,348,000
Collateral Coverage	146.60%
Allowance for Credit Losses	$ 162,000
Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	13,957,000
Net Realizable Value of Collateral	$ 22,254,000
Collateral Coverage	159.40%
Allowance for Credit Losses	$ 0
Non-PCD Loans \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	23,114,000
Net Realizable Value of Collateral	$ 32,094,000
Collateral Coverage	138.90%
Allowance for Credit Losses	$ 162,000
PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	17,109,000
Net Realizable Value of Collateral	$ 25,443,000
Collateral Coverage	148.70%
Allowance for Credit Losses	$ 0
Construction and land development \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	1,425,000
Net Realizable Value of Collateral	$ 1,952,000
Collateral Coverage	137.00%
Allowance for Credit Losses	$ 0
Owner occupied commercial mortgage \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	5,411,000
Net Realizable Value of Collateral	$ 9,428,000
Collateral Coverage	174.20%
Allowance for Credit Losses	$ 0
Non-owner occupied commercial mortgage \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	7,121,000
Net Realizable Value of Collateral	$ 10,874,000
Collateral Coverage	152.70%
Allowance for Credit Losses	$ 0
Residential mortgage \| Non-PCD Loans \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	22,804,000
Net Realizable Value of Collateral	$ 31,779,000
Collateral Coverage	139.40%
Allowance for Credit Losses	$ 162,000
Revolving mortgage \| Non-PCD Loans \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-Dependant Loans	310,000
Net Realizable Value of Collateral	$ 315,000
Collateral Coverage	101.60%
Allowance for Credit Losses	$ 0

Allowance for Credit Losses (Al

Allowance for Credit Losses (Allocation of Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses	$ 223,936	$ 222,450	$ 225,141	$ 226,825	$ 226,583	$ 223,712
Total loan and leases	32,621,208		28,656,355
Loans acquired with deteriorated credit quality	495,878		558,716
Commercial \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses	7,290	6,906	33,213	32,088	31,944	35,270
Commercial \| Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses				47,850	48,962	43,451
Commercial \| Other commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses				2,252	2,342	2,481
Commercial \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses	26,772	24,633	61,610	59,179	56,901	55,620
Commercial \| Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses				2,215	2,183	2,221
Consumer \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses	1,609	1,640	2,709	2,898	2,750	2,350
Consumer \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses				35,130	35,105	35,841
Non-PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			12,915
ALLL for loans and leases collectively evaluated for impairment			204,690
Total allowance for loan and lease losses			217,605
Loans and leases individually evaluated for impairment			185,599
Loans and leases collectively evaluated for impairment			28,137,181
Total loan and leases			28,322,780
Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			5,634
Loans and leases individually evaluated for impairment			88,893
Non-PCD Loans \| Commercial \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			463
ALLL for loans and leases collectively evaluated for impairment			32,750
Total allowance for loan and lease losses			33,213
Loans and leases individually evaluated for impairment			4,655
Loans and leases collectively evaluated for impairment			1,008,799
Total loan and leases			1,013,454
Non-PCD Loans \| Commercial \| Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			3,650
ALLL for loans and leases collectively evaluated for impairment			41,685
Total allowance for loan and lease losses			45,335
Loans and leases individually evaluated for impairment			70,149
Loans and leases collectively evaluated for impairment			12,212,486
Total loan and leases			12,282,635
Non-PCD Loans \| Commercial \| Other commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			39
ALLL for loans and leases collectively evaluated for impairment			2,172
Total allowance for loan and lease losses			2,211
Loans and leases individually evaluated for impairment			1,268
Loans and leases collectively evaluated for impairment			540,760
Total loan and leases			542,028
Non-PCD Loans \| Commercial \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			1,379
ALLL for loans and leases collectively evaluated for impairment			57,995
Total allowance for loan and lease losses			59,374
Loans and leases individually evaluated for impairment			12,182
Loans and leases collectively evaluated for impairment			4,391,610
Total loan and leases			4,403,792
Non-PCD Loans \| Commercial \| Other
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			103
ALLL for loans and leases collectively evaluated for impairment			2,133
Total allowance for loan and lease losses			2,236
Loans and leases individually evaluated for impairment			639
Loans and leases collectively evaluated for impairment			309,454
Total loan and leases			310,093
Non-PCD Loans \| Consumer \| Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			174
ALLL for loans and leases collectively evaluated for impairment			2,535
Total allowance for loan and lease losses			2,709
Loans and leases individually evaluated for impairment			3,882
Loans and leases collectively evaluated for impairment			353,503
Total loan and leases			357,385
Non-PCD Loans \| Consumer \| Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			3,278
ALLL for loans and leases collectively evaluated for impairment			14,954
Total allowance for loan and lease losses			18,232
Loans and leases individually evaluated for impairment			60,442
Loans and leases collectively evaluated for impairment			5,233,475
Total loan and leases			5,293,917
Non-PCD Loans \| Consumer \| Revolving mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			2,722
ALLL for loans and leases collectively evaluated for impairment			16,980
Total allowance for loan and lease losses			19,702
Loans and leases individually evaluated for impairment			28,869
Loans and leases collectively evaluated for impairment			2,310,203
Total loan and leases			2,339,072
Non-PCD Loans \| Consumer \| Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
ALLL for loans and leases individually evaluated for impairment			1,107
ALLL for loans and leases collectively evaluated for impairment			33,486
Total allowance for loan and lease losses			34,593
Loans and leases individually evaluated for impairment			3,513
Loans and leases collectively evaluated for impairment			1,776,891
Total loan and leases			1,780,404
PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for loan and lease losses	$ 25,127	$ 26,928	7,536	$ 6,867	$ 8,343	$ 9,144
PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired loans which have adverse change in expected cash flows			$ 139,400

Allowance for Credit Losses (No

Allowance for Credit Losses (Non-PCI Impaired Loans and Leases) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-PCI impaired loans collective maximum balance collectively evaluated for impairment			$ 500,000
Impaired financing receivable, collectively evaluated			41,000,000
Non-PCD Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			133,358,000
With no recorded allowance			52,241,000
Loans and leases individually evaluated for impairment			185,599,000
Unpaid principal balance			200,599,000
Related allowance recorded			12,915,000
Average balance	$ 183,713,000	$ 163,161,000
Interest income recognized	1,373,000	4,013,000
Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			52,516,000
With no recorded allowance			36,377,000
Loans and leases individually evaluated for impairment			88,893,000
Unpaid principal balance			95,927,000
Related allowance recorded			5,634,000
Average balance	91,050,000	78,011,000
Interest income recognized	705,000	2,072,000
Non-PCD Loans \| Noncommercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			80,842,000
With no recorded allowance			15,864,000
Loans and leases individually evaluated for impairment			96,706,000
Unpaid principal balance			104,672,000
Related allowance recorded			7,281,000
Average balance	92,663,000	85,150,000
Interest income recognized	668,000	1,941,000
Construction and land development \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			1,851,000
With no recorded allowance			2,804,000
Loans and leases individually evaluated for impairment			4,655,000
Unpaid principal balance			5,109,000
Related allowance recorded			463,000
Average balance	6,130,000	3,460,000
Interest income recognized	6,000	40,000
Construction and land development \| Non-PCD Loans \| Noncommercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			2,470,000
With no recorded allowance			1,412,000
Loans and leases individually evaluated for impairment			3,882,000
Unpaid principal balance			4,150,000
Related allowance recorded			174,000
Average balance	3,124,000	3,473,000
Interest income recognized	25,000	93,000
Mortgage \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			42,394,000
With no recorded allowance			27,755,000
Loans and leases individually evaluated for impairment			70,149,000
Unpaid principal balance			74,804,000
Related allowance recorded			3,650,000
Average balance	70,351,000	61,962,000
Interest income recognized	551,000	1,653,000
Mortgage \| Non-PCD Loans \| Noncommercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			48,796,000
With no recorded allowance			11,646,000
Loans and leases individually evaluated for impairment			60,442,000
Unpaid principal balance			64,741,000
Related allowance recorded			3,278,000
Average balance	56,029,000	49,048,000
Interest income recognized	346,000	988,000
Revolving mortgage \| Non-PCD Loans \| Noncommercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			26,104,000
With no recorded allowance			2,765,000
Loans and leases individually evaluated for impairment			28,869,000
Unpaid principal balance			31,960,000
Related allowance recorded			2,722,000
Average balance	30,067,000	29,477,000
Interest income recognized	260,000	763,000
Consumer \| Non-PCD Loans \| Noncommercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			3,472,000
With no recorded allowance			41,000
Loans and leases individually evaluated for impairment			3,513,000
Unpaid principal balance			3,821,000
Related allowance recorded			1,107,000
Average balance	3,443,000	3,152,000
Interest income recognized	37,000	97,000
Other \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			406,000
With no recorded allowance			233,000
Loans and leases individually evaluated for impairment			639,000
Unpaid principal balance			661,000
Related allowance recorded			103,000
Average balance	298,000	314,000
Interest income recognized	2,000	6,000
Other commercial real estate \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			318,000
With no recorded allowance			950,000
Loans and leases individually evaluated for impairment			1,268,000
Unpaid principal balance			1,360,000
Related allowance recorded			39,000
Average balance	1,186,000	797,000
Interest income recognized	6,000	20,000
Commercial and industrial and leases \| Non-PCD Loans \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
With a recorded allowance			7,547,000
With no recorded allowance			4,635,000
Loans and leases individually evaluated for impairment			12,182,000
Unpaid principal balance			13,993,000
Related allowance recorded			$ 1,379,000
Average balance	13,085,000	11,478,000
Interest income recognized	$ 140,000	$ 353,000

Allowance for Credit Losses (Tr

Allowance for Credit Losses (Troubled Debt Restructuring) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	$ 207,130		$ 171,192
Nonaccruing	186,454	$ 168,717	121,689
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			77,536
Commercial \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			2,766
Commercial \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			61,935
Commercial \| Other commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			571
Commercial \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			11,839
Commercial \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			425
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			93,656
Consumer \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			3,882
Consumer \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	50,365		57,861
Consumer \| Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			28,399
Consumer \| Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			3,514
Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	158,779		128,750
Accruing \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			61,627
Accruing \| Commercial \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			487
Accruing \| Commercial \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			50,819
Accruing \| Commercial \| Other commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			571
Accruing \| Commercial \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			9,430
Accruing \| Commercial \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			320
Accruing \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			67,123
Accruing \| Consumer \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			1,452
Accruing \| Consumer \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	33,163		41,813
Accruing \| Consumer \| Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			21,032
Accruing \| Consumer \| Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			2,826
Nonaccruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	48,351		42,442
Nonaccruing \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			15,909
Nonaccruing \| Commercial \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			2,279
Nonaccruing \| Commercial \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			11,116
Nonaccruing \| Commercial \| Other commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			0
Nonaccruing \| Commercial \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			2,409
Nonaccruing \| Commercial \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			105
Nonaccruing \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring			26,533
Nonaccruing \| Consumer \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			2,430
Nonaccruing \| Consumer \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	17,202		16,048
Nonaccruing \| Consumer \| Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			7,367
Nonaccruing \| Consumer \| Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing			688
Non-PCD Loans \| Commercial \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	848
Non-PCD Loans \| Commercial \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	42,278
Non-PCD Loans \| Commercial \| Other commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	18,908
Non-PCD Loans \| Commercial \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	34,592
Non-PCD Loans \| Commercial \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	96,626
Non-PCD Loans \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	86,929
Non-PCD Loans \| Consumer \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	2,833
Non-PCD Loans \| Consumer \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	29,372
Non-PCD Loans \| Consumer \| Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	3,190
Non-PCD Loans \| Consumer \| Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	1,169
Non-PCD Loans \| Accruing \| Commercial \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	791
Non-PCD Loans \| Accruing \| Commercial \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	33,202
Non-PCD Loans \| Accruing \| Commercial \| Other commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	17,728
Non-PCD Loans \| Accruing \| Commercial \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	28,942
Non-PCD Loans \| Accruing \| Commercial \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	80,663
Non-PCD Loans \| Accruing \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	61,315
Non-PCD Loans \| Accruing \| Consumer \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	1,992
Non-PCD Loans \| Accruing \| Consumer \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	22,232
Non-PCD Loans \| Accruing \| Consumer \| Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	2,918
Non-PCD Loans \| Accruing \| Consumer \| Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	1,010
Non-PCD Loans \| Nonaccruing \| Commercial \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	57
Non-PCD Loans \| Nonaccruing \| Commercial \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	9,076
Non-PCD Loans \| Nonaccruing \| Commercial \| Other commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	1,180
Non-PCD Loans \| Nonaccruing \| Commercial \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	5,650
Non-PCD Loans \| Nonaccruing \| Commercial \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	15,963
Non-PCD Loans \| Nonaccruing \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	25,614
Non-PCD Loans \| Nonaccruing \| Consumer \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	841
Non-PCD Loans \| Nonaccruing \| Consumer \| Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	7,140
Non-PCD Loans \| Nonaccruing \| Consumer \| Revolving mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	272
Non-PCD Loans \| Nonaccruing \| Consumer \| Consumer and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccruing	159
PCD Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	23,575		$ 17,200
PCD Loans \| Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	16,801
PCD Loans \| Nonaccruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring	$ 6,774

Allowance for Credit Losses (_2

Allowance for Credit Losses (Note Restructurings During Period) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)loans	Sep. 30, 2019USD ($)loans	Sep. 30, 2020USD ($)loans	Sep. 30, 2019USD ($)loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loans	145	142	462	381
Recorded investment at period end \| $	$ 25,078	$ 14,251	$ 76,497	$ 35,546
Number of Loans \| loans	69	59	178	164
Recorded investment at period end \| $	$ 9,410	$ 4,036	$ 17,553	$ 13,976
Interest only period provided
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loans	6	2	23	6
Recorded investment at period end \| $	$ 5,703	$ 1,221	$ 24,847	$ 3,209
Number of Loans \| loans	3	0	6	2
Recorded investment at period end \| $	$ 3,730	$ 0	$ 6,967	$ 2,064
Loan term extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loans	29	5	62	13
Recorded investment at period end \| $	$ 2,380	$ 2,473	$ 5,885	$ 3,870
Number of Loans \| loans	18	0	34	4
Recorded investment at period end \| $	$ 1,755	$ 0	$ 3,244	$ 514
Below market interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loans	55	80	212	205
Recorded investment at period end \| $	$ 15,341	$ 4,460	$ 38,740	$ 14,968
Number of Loans \| loans	26	34	72	86
Recorded investment at period end \| $	$ 3,170	$ 2,034	$ 5,088	$ 5,977
Discharged from bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loans	55	55	165	157
Recorded investment at period end \| $	$ 1,654	$ 6,097	$ 7,025	$ 13,499
Number of Loans \| loans	22	25	66	72
Recorded investment at period end \| $	$ 755	$ 2,002	$ 2,254	$ 5,421

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	9 Months Ended
Other Real Estate Owned (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Real Estate Properties [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 27,000		$ 23,000
Gains (losses) on sales of OREO	(1,000)	$ 872
OREO
Beginning balance	46,591	48,030
Additions	18,428	15,426
Sales	(18,645)	(17,595)
Write-downs/losses	(3,398)	(3,221)
Ending balance	52,789	46,253
Mortgage
OREO
Beginning balance	14,500
Ending balance	8,500
2019 Acquisitions
OREO
Additions	$ 9,813	$ 3,613

Servicing Rights (MSR Carrying

Servicing Rights (MSR Carrying Value) (Details) - USD ($)	3 Months Ended		9 Months Ended
Servicing Rights (MSR Carrying Value) (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning balance	$ 18,664,000	$ 20,665,000	$ 22,963,000	$ 21,396,000
Servicing rights originated	1,994,000	1,532,000	5,673,000	3,943,000
Amortization	(2,208,000)	(1,581,000)	(6,150,000)	(4,595,000)
Valuation allowance (increase) decrease	(305,000)	(45,000)	(4,341,000)	(173,000)
Ending balance	$ 18,145,000	$ 20,571,000	$ 18,145,000	$ 20,571,000

Servicing Rights (Valuation all

Servicing Rights (Valuation allowance) (Details) - USD ($)	3 Months Ended		9 Months Ended
Servicing Rights (Valuation allowance) (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Beginning balance	$ 4,258,000	$ 128,000	$ 222,000	$ 0
Valuation allowance increase	305,000	45,000	4,341,000	173,000
Ending balance	$ 4,563,000	$ 173,000	$ 4,563,000	$ 173,000

Servicing Rights (Economic Assu

Servicing Rights (Economic Assumptions) (Details) - USD ($)	9 Months Ended
Servicing Rights (Economic Assumptions) (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Servicing Asset Key Economic Assumptions [Line Items]
Weighted average constant prepayment rate	20.80%	13.72%
Weighted average cost to service a loan	$ 87.30	$ 87.09
Fixed Rate Residential Mortgage
Servicing Asset Key Economic Assumptions [Line Items]
Discount rate	7.68%	8.92%
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	8.68%	9.92%
Discount rate, basis spread on Treasury rate	800.00%

Servicing Rights (Narrative) (D

Servicing Rights (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
Servicing Rights (Narrative) (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Mortgage Servicing Rights [Abstract]
Residential Mortgage Loans Serviced	$ 3,360,000,000		$ 3,360,000,000		$ 3,380,000,000
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	2,100,000	$ 1,900,000	6,400,000	$ 5,800,000
Valuation allowance increase	$ 305,000	$ 45,000	$ 4,341,000	$ 173,000

Repurchase Agreements (Details)

Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 748,100
Securities sold under customer repurchase agreements	693,889	$ 442,956
Available-for-sale Securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral		477,600
Overnight and continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under customer repurchase agreements	693,900
Overnight and continuous \| US Government Agencies Debt Securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under customer repurchase agreements	444,000	$ 443,000
Overnight and continuous \| Commercial Mortgage Backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under customer repurchase agreements	$ 249,900

FDIC Shared-Loss Payable (Narra

FDIC Shared-Loss Payable (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
FDIC Shared-Loss Receivable [Abstract]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 36,200
FDIC shared-loss payable	$ 15,313	$ 112,395

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, 2020USD ($)
FDIC Shared-Payable [Abstract]
FDIC shared-loss payable	$ 112,395
Accretion	2,386
Payment made to the FDIC to settle shared-loss agreement	(99,468)
FDIC shared-loss payable	$ 15,313

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), before Tax	$ (17,864)		$ (17,864)		$ (164,576)
Deferred tax expense (benefit)	(4,108)		(4,108)		(37,853)
Accumulated other comprehensive income (loss), net of tax	(13,756)		(13,756)		(126,723)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	11,622	$ (5,933)	27,704	$ (14,926)
Unrealized Losses on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss), before Tax	135,240		135,240		7,522
Deferred tax expense (benefit)	31,105		31,105		1,730
Accumulated other comprehensive income (loss), net of tax	104,135		104,135		5,792
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	16,497	874	42,328	5,278
Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	(4,693)	0	(13,863)
Funded Status of Defined Benefit Plan
Accumulated Other Comprehensive Income (Loss), before Tax	(153,104)		(153,104)		(172,098)
Deferred tax expense (benefit)	(35,213)		(35,213)		(39,583)
Accumulated other comprehensive income (loss), net of tax	(117,891)		(117,891)		$ (132,515)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(4,875)	(2,114)	(14,624)	(6,341)
Amortization of actuarial losses and prior service cost		(2,730)		(8,192)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	$ 6,332	$ 2,745	$ 18,994	$ 8,235

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Components of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss	$ (11,622)	$ 5,933	$ (27,704)	$ 14,926
Net current period other comprehensive (loss) income	(4,092)	8,959	112,967	63,415
Unrealized Losses on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	113,102		5,792
Net unrealized gains arising during period	7,530	3,026	140,671	48,489
Amounts reclassified from accumulated other comprehensive loss	(16,497)	(874)	(42,328)	(5,278)
Net current period other comprehensive (loss) income	(8,967)	2,152	98,343	43,211
Ending balance	104,135	4,706	104,135	4,706
Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	0		0
Net unrealized gains arising during period	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	0	4,693	0	13,863
Net current period other comprehensive (loss) income	0	4,693	0	13,863
Ending balance	0	(57,286)	0	(57,286)
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(122,766)		(132,515)
Net unrealized gains arising during period	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	4,875	2,114	14,624	6,341
Net current period other comprehensive (loss) income	4,875	2,114	14,624	6,341
Ending balance	(117,891)	(119,192)	(117,891)	(119,192)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(9,664)		(126,723)
Net unrealized gains arising during period	7,530	3,026	140,671	48,489
Amounts reclassified from accumulated other comprehensive loss	(11,622)	5,933	(27,704)	14,926
Net current period other comprehensive (loss) income	(4,092)	8,959	112,967	63,415
Ending balance	$ (13,756)	(171,772)	$ (13,756)	(171,772)
Previously Reported \| Unrealized Losses on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		2,554		(38,505)
Previously Reported \| Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(61,979)		(71,149)
Previously Reported \| Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(121,306)		(125,533)
Previously Reported \| Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ (180,731)		$ (235,187)

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	$ 21,425	$ 1,136	$ 54,972	$ 6,855
Amounts reclassified from accumulated other comprehensive income, net of tax	(11,622)	5,933	(27,704)	14,926
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	1,457	631	4,370	1,894
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	(4,875)	(2,114)	(14,624)	(6,341)
Tax effect	4,928	262	12,644	1,577
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	21,425	1,136	54,972	6,855
Amounts reclassified from accumulated other comprehensive income, net of tax	(16,497)	(874)	(42,328)	(5,278)
Tax effect	4,928	262	12,644	1,577
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	16,497	874	42,328	5,278
Defined Benefit Pension Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of actuarial losses and prior service cost		(2,730)		(8,192)
Total before taxes	(6,332)	(2,745)	(18,994)	(8,235)
Amounts reclassified from accumulated other comprehensive income, net of tax	4,875	2,114	14,624	6,341
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		(15)		(43)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	1,457	631	4,370	1,894
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	(4,875)	(2,114)	(14,624)	(6,341)
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	$ 0	4,693	$ 0	13,863
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Before Tax		(6,095)		(18,004)
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Tax		1,402		4,141
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Net Of Tax		$ (4,693)		$ (13,863)

Estimated Fair Values (Estimate

Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 352,419	$ 376,719
Overnight investments	3,137,945	1,107,844
Debt Securities, Available-for-sale	9,019,788	7,059,674
Investment securities held to maturity at cost	747,732	30,996
Investment in marketable equity securities	93,074	82,333
Loans held for sale	120,300	67,900
Loans and Leases Receivable, Net Amount	32,621,208	28,656,355
Income earned not collected	151,737	123,154
Stock issued by Federal Home Loan Bank	45,400	43,000
Deposits	42,250,606	34,431,236
Securities sold under customer repurchase agreements	693,889	442,956
FDIC shared-loss payable	15,313	112,395
Subordinated Debt	504,381	163,412
Other Borrowings	92,456	148,318
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Federal Home Loan Bank Advances	655,179	572,185
Cash and due from banks	352,419	376,719
Overnight investments	3,137,945	1,107,844
Debt Securities, Available-for-sale	9,019,788	7,059,674
Investment securities held to maturity at cost	747,732	30,996
Investment in marketable equity securities	93,074	82,333
Loans held for sale	120,305	67,869
Loans and Leases Receivable, Net Amount	32,621,208	28,656,355
Income earned not collected	151,737	123,154
Stock issued by Federal Home Loan Bank	45,392	43,039
Mortgage servicing rights	19,484	24,891
Deposits	39,110,297	30,593,627
Time deposits	3,140,309	3,837,609
Securities sold under customer repurchase agreements	693,889	442,956
FDIC shared-loss payable	15,313	112,395
Accrued interest payable	10,477	18,124
Subordinated Debt	504,381	163,412
Other Borrowings	92,456	148,318
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Federal Home Loan Bank Advances	680,718	577,362
Cash and due from banks	352,419	376,719
Overnight investments	3,137,945	1,107,844
Debt Securities, Available-for-sale	9,019,788	7,059,674
Investment securities held to maturity at cost	761,252	30,996
Investment in marketable equity securities	93,074	82,333
Loans held for sale	120,305	67,869
Loans and Leases Receivable, Net Amount	33,269,733	28,878,550
Income earned not collected	151,737	123,154
Stock issued by Federal Home Loan Bank	45,392	43,039
Mortgage servicing rights	20,313	26,927
Deposits	39,110,297	30,593,627
Time deposits	3,162,058	3,842,162
Securities sold under customer repurchase agreements	693,889	442,956
FDIC shared-loss payable	15,789	114,252
Accrued interest payable	10,477	18,124
Subordinated Debt	509,518	173,685
Other Borrowings	$ 92,794	$ 149,232

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, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	$ 9,019,788	$ 7,059,674
Investment securities available for sale	9,019,788	7,059,674
Investment in marketable equity securities	93,074	82,333
Loans held for sale	120,305	67,869
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	9,019,788
Investment securities available for sale		7,059,674
Loans held for sale	120,305	67,869
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]
Investment 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	8,769,074
Investment securities available for sale		6,989,989
Loans held for sale	120,305	67,869
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	250,714	69,685
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	654,762
Investment securities available for sale		409,999
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
Investment 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	654,762
Investment securities available for sale		409,999
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
Investment 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	654,941
Investment securities available for sale		682,772
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
Investment securities available for sale		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	654,941
Investment securities available for sale		682,772
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
Investment securities available for sale		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	1,090,210
Investment securities available for sale		380,020
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
Investment securities available for sale		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	1,090,210
Investment securities available for sale		380,020
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
Investment securities available for sale		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	6,069,668
Investment securities available for sale		5,267,090
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
Investment securities available for sale		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	6,069,668
Investment securities available for sale		5,267,090
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
Investment securities available for sale		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	93,074	82,333
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	38,192	29,458
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	54,882	52,875
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	550,207
Investment securities available for sale		201,566
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
Investment securities available for sale		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	299,493
Investment securities available for sale		131,881
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	$ 250,714
Investment securities available for sale		69,685
Fair Value, Measurements, Recurring \| US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale		118,227
Fair Value, Measurements, Recurring \| US States and Political Subdivisions Debt Securities [Member] \| 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 securities available for sale		0
Fair Value, Measurements, Recurring \| US States and Political Subdivisions Debt Securities [Member] \| Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale		118,227
Fair Value, Measurements, Recurring \| US States and Political Subdivisions Debt Securities [Member] \| Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale		$ 0

Estimated Fair Values (Assets_2

Estimated Fair Values (Assets and Liabilities Carried at Fair Value on a Recurring Basis Significant Unobservable Inputs) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
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		$ 1,800,000
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Investment securities available for sale	9,019,788,000		9,019,788,000		$ 7,059,674,000
Corporate Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	169,977,000	$ 149,137,000	69,685,000	$ 143,226,000
Purchases	78,000,000	8,000,000	178,595,000	11,991,000
Amounts included in net income	2,818,000	1,147,000	901,000	2,985,000
Unrealized net (losses) gains included in other comprehensive income	(81,000)	41,000	(249,000)	123,000
Transfers in	0	0	1,782,000	0
Ending balance	250,714,000	$ 157,325,000	250,714,000	$ 157,325,000
Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Investment securities available for sale					7,059,674,000
Fair Value, Measurements, Recurring \| Corporate Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Investment securities available for sale					201,566,000
Significant Unobservable Inputs (Level 3 Inputs) \| Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Investment securities available for sale	$ 250,714,000		$ 250,714,000		69,685,000
Significant Unobservable Inputs (Level 3 Inputs) \| Fair Value, Measurements, Recurring \| Corporate Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Investment securities available for sale					$ 69,685,000

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, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate remeasured during current year	$ 52,789	$ 46,591	$ 46,253	$ 48,030
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,970	132,336
Other real estate remeasured during current year	44,557	38,310
Mortgage servicing rights	16,819	3,757
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	10,970	132,336
Other real estate remeasured during current year	44,557	38,310
Mortgage servicing rights	$ 16,819	$ 3,757

Estimated Fair Values (Fair Val

Estimated Fair Values (Fair Value Option) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) from fair value changes on originated loans held for sale	$ 567	$ 583	$ 4,200	$ 750
Loans Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of originated loans held for sale	120,305		120,305		$ 67,869
Aggregate unpaid principle balance of originated loans held for sale	114,100		114,100		65,697
Difference between fair value and aggregate unpaid principle balance of originated loans held for sale	$ 6,205		$ 6,205		$ 2,172

Estimated Fair Values (Narrativ

Estimated Fair Values (Narrative) (Details)	3 Months Ended		9 Months Ended
Estimated Fair Values (Narrative) (Details)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers from level 2 to level 3	$ 0		$ 1,800,000
Transfers between levels		$ 0		$ 0
Gains (Losses) from fair value changes on originated loans held for sale	567,000	$ 583,000	4,200,000	$ 750,000
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]
Loans held-for-sale, measurement input	0.06		0.06		0.06
OREO, measurement input	0.07		0.07
Discount Rate \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.10		0.10		0.11
OREO, measurement input	0.16		0.16
Discount Rate \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.0751		0.0751
OREO, measurement input	0.0846		0.0846
Effective Interest Rate \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.03		0.03
Effective Interest Rate \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.07		0.07

Employee Benefit Plans (Compone

Employee Benefit Plans (Components Of Pension Expense) (Details) - BancShares Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 3,570	$ 3,191	$ 10,709	$ 9,575
Interest cost	8,549	9,316	25,648	27,945
Expected return on assets	(16,423)	(15,647)	(49,267)	(46,943)
Amortization of prior service cost	0	15	0	43
Amortization of net actuarial loss	6,332	2,730	18,994	8,192
Total pension expense	$ 2,028	$ (395)	$ 6,084	$ (1,188)

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) $ in Millions	3 Months Ended
Employee Benefit Plans (Narrative) (Details) $ in Millions	Sep. 30, 2020USD ($)
BancShares Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 100

Leases (Operating and Finance L

Leases (Operating and Finance Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Asset, operating	$ 69,968	$ 77,115
Asset, finance	7,005	8,820
Total leased assets	76,973	85,935
Present value of lease liabilities	70,129	76,746
Present value of lease liabilities	6,703	8,230
Total lease liabilities	$ 76,832	$ 84,976

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Standby Letters of Credit
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 167,000	$ 167,800
Qualified Affordable Housing Project Investments, Commitment	112,016	99,601
Commitments to Extend Credit
Guarantor Obligations [Line Items]
Unused Commitments to Extend Credit	11,972,688	10,682,378
Qualified Affordable Housing Project Investments	$ 60,600	$ 70,000