Atlantic Union Bankshares (AUB) 10-Q 3 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 28, 2020
Entity Registrant Name	ATLANTIC UNION BANKSHARES CORP
Entity Central Index Key	0000883948
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-39325
Entity Tax Identification Number	54-1598552
Entity Incorporation, State or Country Code	VA
Entity Address, Address Line One	1051 East Cary Street
Entity Address, Address Line Two	Suite 1200
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23219
City Area Code	804
Local Phone Number	633-5031
Document Period End Date	Sep. 30, 2020
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		78,718,695
Common Stock, Class A
Title of 12(b) Security	Common Stock, par value $1.33 per share
Trading Symbol	AUB
Security Exchange Name	NASDAQ
Series A Preferred Stock
Title of 12(b) Security	Depositary Shares, Each Representing a 1/400th Interest in a Share of 6.875% Perpetual Non-Cumulative Preferred Stock, Series A
Trading Symbol	AUBAP
Security Exchange Name	NASDAQ

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Cash and cash equivalents:
Cash and due from banks	$ 178,563	$ 163,050
Interest-bearing deposits in other banks	335,111	234,810
Federal funds sold	7,292	38,172
Total cash and cash equivalents	520,966	436,032
Securities available for sale, at fair value	2,443,340	1,945,445
Securities held to maturity, at carrying value	546,661	555,144
Restricted stock, at cost	112,216	130,848
Loans held for sale, at fair value	52,607	55,405
Loans held for investment, net of deferred fees and costs	14,383,215	12,610,936
Less allowance for loan losses	174,122	42,294
Total loans held for investment, net	14,209,093	12,568,642
Premises and equipment, net	156,934	161,073
Goodwill	935,560	935,560
Amortizable intangibles, net	61,068	73,669
Bank owned life insurance	325,538	322,917
Other assets	566,667	378,255
Total assets	19,930,650	17,562,990
LIABILITIES
Noninterest-bearing demand deposits	4,420,665	2,970,139
Interest-bearing deposits	11,155,433	10,334,842
Total deposits	15,576,098	13,304,981
Securities sold under agreements to repurchase	91,086	66,053
Other short-term borrowings	175,200	370,200
Long-term borrowings	1,048,036	1,077,495
Other liabilities	379,345	231,159
Total liabilities	17,269,765	15,049,888
Commitments and contingencies (Note 8)
STOCKHOLDERS' EQUITY
Preferred stock, $10.00 par value	173	0
Common stock, $1.33 par value	104,141	105,827
Additional paid-in capital	1,914,640	1,790,305
Retained earnings	579,269	581,395
Accumulated other comprehensive income (loss)	62,662	35,575
Total stockholders' equity	2,660,885	2,513,102
Total liabilities and stockholders' equity	$ 19,930,650	$ 17,562,990
Common shares outstanding	78,718,850	80,001,185
Common shares authorized	200,000,000	200,000,000
Preferred shares outstanding	17,250	0
Preferred shares authorized	500,000	500,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 10
Common stock, par value (in dollars per share)	$ 1.33	$ 1.33

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest and dividend income:
Interest and fees on loans	$ 138,402	$ 156,651	$ 432,763	$ 459,603
Interest on deposits in other banks	137	1,030	1,154	2,047
Interest and dividends on securities:
Taxable	10,275	12,625	33,170	39,059
Nontaxable	8,600	8,039	24,520	24,413
Total interest and dividend income	157,414	178,345	491,607	525,122
Interest expense:
Interest on deposits	15,568	30,849	63,943	84,088
Interest on short-term borrowings	72	2,200	1,598	14,313
Interest on long-term borrowings	4,393	8,695	16,372	23,978
Total interest expense	20,033	41,744	81,913	122,379
Net interest income	137,381	136,601	409,694	402,743
Provision for credit losses	6,558	9,100	100,954	18,192
Net interest income after provision for credit losses	130,823	127,501	308,740	384,551
Noninterest income:
Mortgage banking income	8,897	3,374	16,744	7,614
Gains on securities transactions	18	7,104	12,293	7,306
Bank owned life insurance income	3,421	2,062	7,498	6,191
Loan-related interest rate swap fees	3,170	5,480	12,602	10,656
Other operating income	3,215	12,708	4,116	15,045
Total noninterest income	34,407	48,106	99,245	103,621
Noninterest expenses:
Salaries and benefits	49,000	49,718	149,013	148,116
Occupancy expenses	7,441	7,493	21,798	22,427
Furniture and equipment expenses	3,895	3,719	11,042	10,656
Printing, postage, and supplies	904	1,268	3,194	3,763
Technology and data processing	6,564	5,787	19,187	17,203
Professional services	2,914	2,681	9,211	8,269
Marketing and advertising expense	2,631	2,600	7,413	7,891
FDIC assessment premiums and other insurance	1,811	381	7,578	5,620
Other taxes	4,124	3,971	12,364	11,779
Loan-related expenses	2,314	2,566	7,512	7,250
OREO and credit-related expenses	413	1,005	1,512	3,162
Amortization of intangible assets	4,053	4,764	12,676	13,919
Training and other personnel costs	746	1,618	3,192	4,240
Merger-related costs	0	2,435	0	26,928
Rebranding expense	0	1,133	0	5,553
Loss on debt extinguishment	0	16,397	10,306	16,397
Other expenses	6,412	4,151	15,683	10,849
Total noninterest expenses	93,222	111,687	291,681	324,022
Income from continuing operations before income taxes	72,008	63,920	116,304	164,150
Income tax expense	11,008	10,724	17,506	26,330
Income from continuing operations	61,000	53,196	98,798	137,820
Discontinued operations:
Income (loss) from operations of discontinued mortgage segment	0	56	0	(173)
Income tax expense (benefit)	0	14	0	(45)
Income (loss) on discontinued operations	0	42	0	(128)
Net income	61,000	53,238	98,798	137,692
Dividends on preferred stock	2,691		2,691
Net Income available to common shareholders	$ 58,309	$ 53,238	$ 96,107	$ 137,692
Basic earnings per common share (in dollars per share)	$ 0.74	$ 0.65	$ 1.22	$ 1.72
Diluted earnings per common share (in dollars per share)	0.74	0.65	1.22	1.72
Dividends declared per common share (in dollars per share)	$ 0.25	$ 0.25	$ 0.75	$ 0.71
Weighted average shares outstanding, basic (in shares)	78,714,353	81,769,193	78,904,792	80,120,725
Diluted weighted average number of common shares outstanding (in shares)	78,725,346	81,832,868	78,921,108	80,183,113
Service charges on deposit accounts
Noninterest income:
Noninterest income	$ 6,041	$ 7,675	$ 18,549	$ 22,331
Other service charges, commissions and fees
Noninterest income:
Noninterest income	1,621	1,513	4,600	4,879
Interchange fees
Noninterest income:
Noninterest income	1,979	2,108	5,300	12,765
Fiduciary and asset management fees
Noninterest income:
Noninterest income	$ 6,045	$ 6,082	$ 17,543	$ 16,834

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		$ 61,000	$ 53,238	$ 98,798	$ 137,692
Cash flow hedges:
Change in fair value of cash flow hedges		0	6,025	(699)	1,970
Reclassification adjustment for losses included in net income (net of tax, $0 and $42 for the three months and $394 and $120 for the nine months ended September 30, 2020 and 2019, respectively)	[1]	0	158	1,481	451
AFS securities:
Unrealized holding gains arising during period (net of tax, $332 and $3,287 for the three months and $9,824 and $14,513 for the nine months ended September 30, 2020 and 2019, respectively)		1,250	12,364	36,956	54,598
Reclassification adjustment for gains included in net income (net of tax, $4 and $1,492 for the three months and $2,582 and $1,534 for the nine months ended September 30, 2020 and 2019, respectively)	[2]	(14)	(5,612)	(9,711)	(5,772)
HTM securities:
Reclassification adjustment for accretion of unrealized gain on AFS securities transferred to HTM (net of tax, $1 and $1 for the three months and $4 and $4 for the nine months ended September 30, 2020 and 2019, respectively)	[3]	(5)	(5)	(15)	(15)
Bank owned life insurance:
Unrealized holding losses arising during the period		0	(647)	(1,289)	(647)
Reclassification adjustment for losses included in net income	[4]	127	19	364	57
Other comprehensive income (loss)		1,358	12,302	27,087	50,642
Comprehensive income		$ 62,358	$ 65,540	$ 125,885	$ 188,334
[1]	The gross amounts reclassified into earnings for the nine months ended September 30, 2020 included a $1.8 million loss related to the termination of a cash flow hedge that is reported in “Other operating income” with the corresponding income tax effect being reflected as a component of income tax expense. The remaining gross amounts are reported in the interest income and interest expense sections of the Company’s Consolidated Statements of Income with the corresponding income tax effect being reflected as a component of income tax expense.
[2]	The gross amounts reclassified into earnings are reported as "Gains on securities transactions" on the Company’s Consolidated Statements of Income with the corresponding income tax effect being reflected as a component of income tax expense.
[3]	The gross amounts reclassified into earnings are reported within interest income on the Company’s Consolidated Statements of Income with the corresponding income tax effect being reflected as a component of income tax expense.
[4]	Reclassifications in earnings are reported in "Salaries and benefits" expense on the Company’s Consolidated Statements of Income.

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - 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]
Tax expense (benefit) related to reclassification adjustment for losses included in net income	$ 0	$ (42)	$ (394)	$ (120)
Tax expense (benefit) related to unrealized holding gains (losses) arising during period	332	3,287	9,824	14,513
Tax expense (benefit) related to gains on the sale of securities	4	1,492	2,582	1,534
Tax expense (benefit) related to unrealized gain for AFS securities transferred to HTM	$ 1	$ 1	$ 4	$ 4

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Preferred Stock	Additional Paid-In Capital	Retained EarningsCumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Beginning balance at Dec. 31, 2018	$ 87,250		$ 1,380,259		$ 467,345	$ (10,273)		$ 1,924,581
Net income					35,631			35,631
Other comprehensive income (net of taxes)						18,670		18,670
Issuance of common stock in regard to acquisitions	21,070		478,904					499,974
Dividends on common stock					(18,838)			(18,838)
Issuance of common stock under Equity Compensation Plans	8		130					138
Issuance of common stock for services rendered	8		211					219
Vesting of restricted stock, including tax effects, under Equity Compensation Plan	139		(1,786)					(1,647)
Stock-based compensation expense			1,870					1,870
Ending balance (Accounting Standards Update 2016-02) at Mar. 31, 2019				$ (1,133)			$ (1,133)
Ending balance at Mar. 31, 2019	108,475		1,859,588		483,005	8,397		2,459,465
Beginning balance at Dec. 31, 2018	87,250		1,380,259		467,345	(10,273)		1,924,581
Net income								137,692
Other comprehensive income (net of taxes)						50,642		50,642
Issuance of common stock in regard to acquisitions								499,974
Ending balance at Sep. 30, 2019	107,330		1,831,667		545,665	40,369		2,525,031
Beginning balance at Mar. 31, 2019	108,475		1,859,588		483,005	8,397		2,459,465
Net income					48,823			48,823
Other comprehensive income (net of taxes)						19,670		19,670
Dividends on common stock					(18,876)			(18,876)
Issuance of common stock under Equity Compensation Plans	48		938					986
Issuance of common stock for services rendered	8		192					200
Vesting of restricted stock, including tax effects, under Equity Compensation Plan	29		(336)					(307)
Stock-based compensation expense			2,334					2,334
Ending balance at Jun. 30, 2019	108,560		1,862,716		512,952	28,067		2,512,295
Net income					53,238			53,238
Other comprehensive income (net of taxes)						12,302		12,302
Dividends on common stock					(20,525)			(20,525)
Stock purchased under stock repurchase plan	(1,289)		(33,995)					(35,284)
Issuance of common stock under Equity Compensation Plans	38		656					694
Issuance of common stock for services rendered	10		269					279
Vesting of restricted stock, including tax effects, under Equity Compensation Plan	11		(138)					(127)
Stock-based compensation expense			2,159					2,159
Ending balance at Sep. 30, 2019	107,330		1,831,667		545,665	40,369		2,525,031
Beginning balance at Dec. 31, 2019	105,827		1,790,305		581,395	35,575		2,513,102
Net income					7,089			7,089
Other comprehensive income (net of taxes)						12,754		12,754
Dividends on common stock					(19,825)			(19,825)
Stock purchased under stock repurchase plan	(1,985)		(47,894)					(49,879)
Issuance of common stock under Equity Compensation Plans	46		731					777
Issuance of common stock for services rendered	9		195					204
Vesting of restricted stock, including tax effects, under Equity Compensation Plan	189		(2,199)					(2,010)
Stock-based compensation expense			2,291					2,291
Ending balance (Accounting Standards Update 2016-13) at Mar. 31, 2020				$ (39,053)			$ (39,053)
Ending balance at Mar. 31, 2020	104,086		1,743,429		529,606	48,329		2,425,450
Beginning balance at Dec. 31, 2019	105,827		1,790,305		581,395	35,575		2,513,102
Net income								98,798
Other comprehensive income (net of taxes)						27,087		27,087
Issuance of common stock in regard to acquisitions								0
Ending balance at Sep. 30, 2020	104,141	$ 173	1,914,640		579,269	62,662		2,660,885
Beginning balance at Mar. 31, 2020	104,086		1,743,429		529,606	48,329		2,425,450
Net income					30,709			30,709
Other comprehensive income (net of taxes)						12,975		12,975
Net proceeds from preferred stock		173	166,190					166,363
Dividends on common stock					(19,677)			(19,677)
Issuance of common stock under Equity Compensation Plans	2		22					24
Issuance of common stock for services rendered	11		189					200
Vesting of restricted stock, including tax effects, under Equity Compensation Plan	27		(206)					(179)
Stock-based compensation expense			2,361					2,361
Ending balance at Jun. 30, 2020	104,126	173	1,911,985		540,638	61,304		2,618,226
Net income					61,000			61,000
Other comprehensive income (net of taxes)						1,358		1,358
Net proceeds from preferred stock			(7)					(7)
Dividends on common stock					(19,678)			(19,678)
Dividends on preferred stock					(2,691)			(2,691)
Issuance of common stock for services rendered	11		189					200
Vesting of restricted stock, including tax effects, under Equity Compensation Plan	4		(27)					(23)
Stock-based compensation expense			2,500					2,500
Ending balance at Sep. 30, 2020	$ 104,141	$ 173	$ 1,914,640		$ 579,269	$ 62,662		$ 2,660,885

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Other comprehensive income (loss), tax	$ 327	$ 3,415	$ 3,890	$ 1,836	$ 5,913	$ 5,346
Issuance of Common Stock in regard to acquisition, shares						15,842,026
Issuance of preferred stock, shares		17,250
Dividends on common stock (in dollars per share)	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.23	$ 0.23
Dividends on preferred stock (in dollars per share)	$ 156.60
Issuance of common stock under Equity Compensation Plan, shares		1,632	34,714	28,253	36,551	6,127
Stock purchased under stock repurchase plan, shares			1,493,472	969,265
Issuance of common stock for services rendered, shares	8,592	8,640	6,860	7,840	6,192	6,085
Vesting of restricted stock, net of shares held for taxes, under Equity Compensation Plans, shares	3,009	19,848	142,176	8,247	21,447	104,151

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	$ 98,798	$ 137,692
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation of premises and equipment	11,311	11,138
Write-down of foreclosed properties and former bank premises	4,847	1,162
Amortization, net	20,151	19,033
Amortization (accretion) related to acquisition, net	(7,736)	(5,200)
Provision for credit losses	100,954	18,192
Gains on securities transactions, net	(12,293)	(7,306)
BOLI income	(7,498)	(6,191)
Decrease (increase) in loans held for sale, net	2,798	(50,981)
Losses (gains) on sales of foreclosed properties and former bank premises, net	37	144
Loss on debt extinguishment	10,306	16,397
Stock-based compensation expenses	7,152	6,363
Issuance of common stock for services	604	698
Net decrease (increase) in other assets	(180,310)	(76,118)
Net increase in other liabilities	128,298	44,312
Net cash provided by (used in) operating activities	177,419	109,335
Investing activities:
Purchases of AFS securities and restricted stock	(940,745)	(312,120)
Purchases of HTM securities	0	(47,217)
Proceeds from sales of AFS securities and restricted stock	232,946	486,925
Proceeds from maturities, calls and paydowns of AFS securities	271,986	176,824
Proceeds from maturities, calls and paydowns of HTM securities	5,996	2,523
Net increase in loans held for investment	(1,761,350)	(371,260)
Net increase in premises and equipment	(18,557)	(11,547)
Proceeds from BOLI settlements	439	0
Proceeds from sales of foreclosed properties and former bank premises	2,706	5,329
Cash paid in acquisitions	0	(12)
Cash acquired in acquisitions	0	46,164
Net cash provided by (used in) investing activities	(2,206,579)	(24,391)
Financing activities:
Net increase in noninterest-bearing deposits	1,450,526	376,160
Net increase in interest-bearing deposits	820,701	471,204
Net increase (decrease) in short-term borrowings	(169,967)	(896,622)
Cash paid for contingent consideration	0	(565)
Proceeds from issuance of long-term debt	189,945	550,000
Repayments of long-term debt	(230,306)	(160,614)
Cash dividends paid - common stock	(59,180)	(58,239)
Cash dividends paid - preferred stock	(2,691)	0
Repurchase of common stock	(49,879)	(35,284)
Issuance of common stock	801	1,818
Issuance of preferred stock, net	166,356	0
Vesting of restricted stock, net of shares held for taxes	(2,212)	(2,081)
Net cash provided by (used in) financing activities	2,114,094	245,777
Increase (decrease) in cash and cash equivalents	84,934	330,721
Cash, cash equivalents and restricted cash at beginning of the period	436,032	261,199
Cash, cash equivalents and restricted cash at end of the period	520,966	591,920
Cash payments for:
Interest	82,409	118,067
Income taxes	13,649	20,416
Supplemental schedule of noncash investing and financing activities
Transfers from loans (foreclosed properties) to foreclosed properties (loans)	615	1,816
Transfers from bank premises to OREO	7,949
Issuance of common stock in exchange for net assets in acquisition	0	499,974
Transactions related to acquisitions
Assets acquired	0	2,855,993
Liabilities assumed	$ 0	$ 2,558,638

ACCOUNTING POLICIES

ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
ACCOUNTING POLICIES	1. ACCOUNTING POLICIES The Company Headquartered in Richmond, Virginia, Atlantic Union Bankshares Corporation (Nasdaq: AUB) is the holding company for Atlantic Union Bank. Atlantic Union Bank has 135 branches and approximately 155 ATMs located throughout Virginia, and in portions of Maryland and North Carolina. Middleburg Financial is a brand name used by Atlantic Union Bank and certain affiliates when providing trust, wealth management, private banking, and investment advisory products and services. Certain non-bank affiliates of Atlantic Union Bank include: Old Dominion Capital Management, Inc., and its subsidiary, Outfitter Advisors, Ltd., and Dixon, Hubard, Feinour, & Brown, Inc., which provide investment advisory services, Middleburg Investment Services, LLC, which provides brokerage services; and Union Insurance Group, LLC, which offers various lines of insurance products. The unaudited consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information and follow general practice within the banking industry. Accordingly, the unaudited consolidated financial statements do not include all the information and footnotes required by U.S. GAAP for complete financial statements; however, in the opinion of management, all adjustments necessary for a fair presentation of the results of the interim periods presented have been made. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other period. ​ These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s 2019 Form 10-K. Certain prior period amounts have been reclassified to conform to current period presentation. ​ Impact of COVID-19 On March 13, 2020, the United States President declared a national emergency in the face of a growing public health and economic crisis due to the COVID-19 global pandemic. Within a few days of the declaration of a national emergency, governors of states comprising the Company’s geographic footprint issued states of emergency in response to the novel COVID-19. As a result of this pandemic, actions were taken around the world to help mitigate the spread of COVID 19, which have impacted the economies and financial markets of many countries, including the geographical area in which the Company operates. On March 27, 2020, the CARES Act was signed into law. The CARES Act is designated to provide financial relief to the American people and American businesses in response to the economic fallout from COVID-19. On March 22, 2020, the five federal bank regulatory agencies and the Conference of State Bank Supervisors issued joint guidance (subsequently revised on April 7, 2020) with respect to loan modifications for borrowers affected by COVID-19. The CARES Act, as well as the March 22 Joint Guidance, provide enhanced guidelines and accounting for COVID-19 related modifications. ​ The federal banking regulators have confirmed with the FASB that short-term loan modifications made on a good faith basis in response to COVID-19 to borrowers who were current (i.e., less than 30 days past due on contractual payments) when the modification program was implemented are not considered TDRs. In addition, Section 4013 of the CARES Act provides banks, savings associations, and credit unions with the ability to make loan modifications related to COVID-19 without categorizing the loan as a TDR or conducting the analysis to make the determination, which is intended to streamline the loan modification process. Any such suspension is effective for the term of the loan modification; however, the suspension is only permitted for loan modifications made during the effective period of Section 4013 and only for those loans that were not more than thirty days past due as of December 31, 2019. The Company has made $1.8 billion of loan modifications pursuant to the March 22 Joint Guidance or Section 4013 of the CARES Act and as of September 30, 2020 approximately $769.6 million remain under their modified terms. The majority of the Company’s modifications as of September 30, 2020 were in the commercial real estate portfolios. ​ The Bank processed over 11,000 PPP loans, which totaled $1.7 billion with a recorded investment of $1.6 billion as of September 30, 2020, which included unamortized deferred fees of $32.6 million. The loans carry a 1% interest rate. ​ Adoption of New Accounting Standards On January 1, 2020, the Company adopted ASC 326. This ASU updates the existing guidance to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. This ASU replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to- maturity debt securities. It also applies to unfunded credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). The Company established a cross-functional governance structure to oversee the Company’s implementation of the CECL methodology, which included evaluating key assumptions used and assessing the internal controls over financial reporting related to the adoption of ASC 326. The Company adopted ASC 326 using the modified retrospective method for all financial assets measured at amortized cost and unfunded credit exposures. 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. As a result of adopting ASC 326, the Company recorded a net decrease to retained earnings of $39.1 million. ASC 326 also replaced the Company’s current accounting for PCI loans. With the adoption of ASC 326, previously classified PCI loans are now classified as PCD loans. In accordance with ASC 326, the Company did not re-assess whether individual modifications were needed to individual acquired financial assets accounted for in the pools with troubled debt restructurings as of the date of adoption. The Company adopted ASC 326 using the prospective transition approach for financial assets with PCD that were previously identified as PCI and accounted for under ASC 310-30. On January 1, 2020, the amortized cost basis of the PCD assets were adjusted to reflect the addition of $2.4 million to the ACL. The remaining noncredit discount (based on the adjusted amortized cost basis) will be accreted into interest income at the effective interest rate as of January 1, The Company adopted ASC 326 using the prospective transition approach for debt securities. The effective interest rate on these debt securities was not changed. Upon adoption of ASC 326, the Company did not have any securities included in its portfolio where OTTI had previously been The following table illustrates the impact of ASC ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ January 1, ​ January 1, ​ ​ 2019 ​ 2020 ​ 2020 ​ ​ As Previously Reported (Incurred Loss) ​ Impact of CECL Adoption ​ As Reported Under CECL Assets: ​ ​ ​ ​ ​ ​ Loans ​ ​ ​ ​ ​ ​ Commercial $ 30,941 $ 6,184 $ 37,125 Consumer ​ 11,353 ​ 41,300 ​ 52,653 Allowance for loan and lease losses ​ 42,294 ​ 47,484 ​ 89,778 Liabilities: ​ ​ ​ ​ ​ ​ Allowance for credit losses on unfunded credit exposure ​ 900 ​ 4,160 ​ 5,060 Total Allowance for credit losses $ 43,194 $ 51,644 $ 94,838 ​ Allowance for Loan and Lease Losses The provision for loan losses charged to operations is an amount sufficient to bring the allowance to an estimated balance that management considers adequate to absorb expected losses in the Company’s loan portfolio. The ALLL is a valuation account that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Amortized cost is the principal balance outstanding, net of any purchase premiums and discounts and net of any deferred loan fees and costs. The ALLL represents management’s estimate of credit losses over the remaining life of the loan portfolio. Loans are charged off against the ALLL when management believes the loan balance is no longer collectible. Subsequent recoveries of previously charged off amounts are recorded as increases to the Management’s determination of the adequacy of the ALLL is based on an evaluation of the composition of the loan portfolio, the value and adequacy of collateral, current economic conditions, historical loan loss experience, reasonable and supportable forecasts, and other risk factors. The ALLL is estimated by pooling loans by call code and credit risk indicator and applying a loan-level PD/LGD method for all loans with the exception of its auto and third party consumer lending portfolios. For auto and third party consumer portfolios, the Company has elected to pool those loans based on similar risk characteristics to determine the ALLL using vintage and loss rate methods. The Company utilizes a forecast period of two years and then reverts to the mean of historical loss factors on a straight-line basis over the following two-year period. The Company considers economic forecasts and recession probabilities from highly recognized third-parties to inform the model for loss estimation. The Company’s ALLL estimate is particularly impacted by the unemployment rate forecast in its geographic footprint. In the current quarter forecast, the unemployment rate in the Company’s geographic footprint is projected to remain significantly elevated through the forecast period. Management also considers qualitative factors when estimating loan losses to take into account model limitations. For the current quarter, the largest qualitative additions were related to industries that are particularly impacted by the COVID-19 pandemic and uncertainty regarding the extent and duration of the pandemic and the timing and efficacy of any potential future government stimulus. These qualitative factors were partially offset by qualitative reductions meant to account for enhanced unemployment benefits, bank deferrals, the PPP loan program and other factors. The Company’s Allowance Committee approves the key methodologies and assumptions, as well as the final ALLL on a quarterly basis. While management uses available information to estimate expected losses on loans, future changes in the ALLL may be necessary based on changes in portfolio composition, portfolio credit quality, and/or economic conditions. Loans that do not share risk characteristics are evaluated on an individual basis. The individual reserve component relates to loans that have shown substantial credit deterioration as measured by risk rating and/or delinquency status. In addition, the Company has elected the practical expedient that would include loans for individual assessment consideration if the repayment of the loan is expected substantially through the operation or sale of collateral because the borrower is experiencing financial difficulty. Where the source of repayment is the sale of collateral, the ALLL is based on the fair value of the underlying collateral, less selling costs, compared to the amortized cost basis of the loan. If the ALLL is based on the operation of the collateral, the reserve is calculated based on the fair value of the collateral calculated as the present value of expected cash flows from the operation of the collateral, compared to the amortized cost basis. If the Company determines that the value of a collateral dependent loan is less than the recorded investment in the loan, the Company charges off the deficiency if it is determined that such amount is deemed to be a confirmed loss. Typically, a loss is confirmed when the Company is moving towards foreclosure (or final disposition). In situations where, for economic or legal reasons related to a borrower’s financial condition, the Company grants a concession in the loan structure to the borrower that it would not otherwise consider, the related loan is classified as a TDR. With the exception of loans with interest rate concessions, the ALLL on a TDR is measured using the same method as all other loans held for investment. For loans with interest rate concessions, the Company uses a discounted cash flow approach using the original interest rate. Reserve for Unfunded Commitments The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The reserve for unfunded commitments is adjusted as a provision for credit loss expense and is measured using the same measurement objectives as the ALLL. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded and is included in “Other Liabilities” within the Company’s Consolidated Balance Sheets. Accrued Interest Receivable The Company has elected to exclude accrued interest from the amortized cost basis in its determination of the ACL reserve for both loans and HTM securities, as well as elected the policy to write-off accrued interest receivable directly through the reversal of interest income. Accrued interest receivable totaled $55.4 million on loans held for investment and, $5.1 million on HTM securities at September 30, 2020 and is included in “Other Assets” on the Company’s Consolidated Balance Sheets. Acquired Loans The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. Acquired loans are recorded at their fair value at acquisition date without carryover of the acquiree’s previously established ALLL, as credit discounts are included in the determination of fair value. The fair value of the loans is determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected on the loans and then applying a market-based discount rate to those cash flows. During evaluation upon acquisition, acquired loans are also classified as either PCD or acquired performing. The purchase discount on acquired performing loans is accounted for under ASC 310-20, Receivables – Nonrefundable Fees and Other Costs PCD loans reflect loans that have experienced more-than-insignificant credit deterioration since origination. These PCD loans are accounted for under ASC 326 . PCD loans are recorded at the amount paid. An ALLL is determined using the same methodology as other loans held for investment. For PCD loans not individually assessed, the initial ALLL is determined on a collective basis and is allocated to individual loans. The sum of the loan's purchase price and ALLL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. The Cash and Cash Equivalents For purposes of reporting cash flows, the Company defines cash and cash equivalents as cash, cash due from banks, interest-bearing deposits in other banks, money market investments, other interest-bearing deposits, and federal funds sold. ​ Restricted cash is disclosed in Note 8 “Commitments and Contingencies” and is comprised of cash maintained at various correspondent banks as collateral for the Company’s derivative portfolio and is included in interest-bearing deposits in other banks in the Company’s Consolidated Balance Sheets. In addition, the Company is required to maintain reserve balances with the Federal Reserve Bank based on the type and amount of deposits; however, on March 15, 2020 the Federal Reserve Board announced that reserve requirement ratios would be reduced to zero percent effective March 26, 2020 due to economic conditions, which eliminated the reserve requirement for all depository institutions. ​ Investment Securities Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are generally amortized on the level-yield method without anticipating prepayments, except for mortgage-backed securities The Company regularly evaluates all securities whose values have declined below amortized cost to assess whether the decline in fair value is the result of credit impairment. For AFS securities, the Company evaluates the fair value and credit quality of its AFS securities on at least a quarterly basis. In the event the fair value of a security falls below its amortized cost basis, the security will be evaluated to determine whether the decline in value was caused by changes in market interest rates or security credit quality. The primary indicators of credit quality for the Company’s AFS portfolio are security type and credit rating, which are influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, structure, credit enhancement and other factors. There is currently no ACL held against the Company’s AFS securities portfolio at September 30, 2020. See Note 3 “Securities,” for additional information on the Company’s ACL analysis. If unrealized losses are related to credit quality, the Company estimates the credit related loss by evaluating the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis of the security and a credit loss exists, an ACL shall be recorded for the credit loss, limited by the amount that the fair value is less than amortized cost basis. Non-credit related declines in fair value are recognized in other comprehensive income, net of applicable taxes. Changes in the ACL are recorded as provision for (or reversal of) credit loss expense. Charge-offs are recorded against the ACL when management believes the AFS security is no longer collectible. Currently, the Company does not have an ACL on its AFS debt securities portfolio. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent. The Company evaluates the credit risk of its HTM securities on at least a quarterly basis. Management estimates expected credit losses on held-to-maturity debt securities based on an individual basis based on the PD/LGD methodology primarily using security-level credit ratings. Management recorded an immaterial ACL on HTM securities as a result of the adoption of ASC 326, and no additional changes were needed at September 30, 2020.

ACQUISITIONS

ACQUISITIONS	9 Months Ended
	Sep. 30, 2020
ACQUISITIONS [Abstract]
ACQUISITIONS	2. ACQUISITIONS Access Acquisition On February 1, 2019, the Company completed its acquisition of Access National Corporation (and its subsidiaries), a bank holding company based in Reston, Virginia. Holders of shares of Access’s common stock received 0.75 shares of the Company’s common stock in exchange for each share of Access’s common stock, resulting in the Company issuing 15,842,026 shares of the Company’s common stock at a fair value of approximately $500.0 million. In addition, the Company paid cash of approximately $12,000 in lieu of fractional shares. The transaction was accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed, and consideration exchanged were recorded at estimated fair values on the acquisition date. Fair values are preliminary and subject to refinement for up to one year after the closing date of the acquisition, in accordance with ASC 350, Intangibles-Goodwill and Other . The measurement period was formally closed as of February 1, 2020, and the Company did not make any measurement period adjustments in 2020. There were no merger-related costs associated with the acquisition of Access during the first nine months of 2020. Merger- related costs associated with the acquisition of Access were $2.0 million and $25.6 million for the three and nine months ended September 30, 20 19, respectively . Such costs include legal and accounting fees, lease and contract termination expenses, system conversion, and employee severances, which have been expensed as incurred. ​

SECURITIES

SECURITIES	9 Months Ended
	Sep. 30, 2020
Securities [Abstract]
SECURITIES	3. SECURITIES On January 1, 2020, the Company adopted ASC 326, which made changes to the accounting for AFS debt securities whereby credit losses should be presented as an allowance, rather than as a write-down when management does not intend to sell and does not believe that it is more likely than not they will be required to sell prior to maturity. In addition, ASC 326 requires financial assets measured at amortized cost, including held-to-maturity debt securities, to measure an expected credit loss under the CECL methodology that requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. For further discussion on the Company’s accounting policies and policy elections related to the accounting standard update refer to Note 1 “Accounting Policies”. ​ All securities information presented as of September 30, 2020 is in accordance with ASC 326. All securities information presented prior to March 31, 2020 is in accordance with previous applicable GAAP. See the Company’s prior accounting policies in Note 1 “Summary of Significant Accounting Policies” of the 2019 Form 10-K. Available for Sale ​ The Company’s AFS investment portfolio is generally highly-rated or agency backed. All AFS securities were current with no securities past due or on non-accrual as of September 30, 2020. ​ The amortized cost, gross unrealized gains and losses, and estimated fair values of AFS securities as of September 30, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated ​ Cost Gains (Losses) Fair Value September 30, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 13,463 ​ $ 465 ​ $ (50) ​ $ 13,878 Obligations of states and political subdivisions ​ 759,936 ​ 39,033 ​ (2,113) ​ 796,856 Corporate and other bonds (1) ​ 147,438 ​ 2,217 ​ (737) ​ 148,918 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 340,706 ​ 17,945 ​ (116) ​ ​ 358,535 Non-agency ​ ​ 30,359 ​ 71 ​ — ​ ​ 30,430 Total commercial mortgage-backed securities ​ ​ 371,065 ​ 18,016 ​ (116) ​ ​ 388,965 Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 960,141 ​ 35,275 ​ (1,410) ​ ​ 994,006 Non-agency ​ ​ 99,252 ​ 587 ​ (743) ​ ​ 99,096 Total residential mortgage-backed securities ​ ​ 1,059,393 ​ 35,862 ​ (2,153) ​ ​ 1,093,102 Other securities ​ 1,621 ​ — ​ — ​ 1,621 Total AFS securities ​ $ 2,352,916 ​ $ 95,593 ​ $ (5,169) ​ $ 2,443,340 (1) Other bonds include asset-backed securities. The amortized cost, gross unrealized gains and losses, and estimated fair values of AFS securities as of December 31, 2019 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated December 31, 2019 Cost Gains (Losses) Fair Value U.S. government and agency securities ​ $ 21,149 ​ $ 209 ​ $ (38) ​ $ 21,320 Obligations of states and political subdivisions ​ ​ 421,344 ​ ​ 25,776 ​ ​ (29) ​ ​ 447,091 Corporate and other bonds (1) ​ 134,342 ​ 1,991 ​ (374) ​ 135,959 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 405,731 ​ ​ 8,786 ​ ​ (619) ​ ​ 413,898 Non-agency ​ ​ 11,173 ​ ​ — ​ ​ (24) ​ ​ 11,149 Total commercial mortgage-backed securities ​ ​ 416,904 ​ ​ 8,786 ​ ​ (643) ​ ​ 425,047 Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 852,300 ​ ​ 16,680 ​ ​ (816) ​ ​ 868,164 Non-agency ​ ​ 44,309 ​ ​ 476 ​ ​ — ​ ​ 44,785 Total residential mortgage-backed securities ​ ​ 896,609 ​ ​ 17,156 ​ ​ (816) ​ ​ 912,949 Other securities ​ 3,079 ​ — ​ — ​ 3,079 Total AFS securities ​ $ 1,893,427 ​ $ 53,918 ​ $ (1,900) ​ $ 1,945,445 (1) Other bonds include asset-backed securities ​ The following table shows the gross unrealized losses and fair value of the Company’s AFS securities with unrealized losses for which an allowance for credit losses has not been recorded at September 30, 2020 and that are not deemed to be other than temporarily impaired as of December 31, 2019. These are aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ More than 12 months ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ Value ​ Losses ​ Value ​ Losses ​ Value ​ Losses September 30, 2020 ​ ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ — ​ $ — ​ $ 5,956 ​ $ (50) ​ $ 5,956 ​ ​ (50) Obligations of states and political subdivisions ​ ​ 175,282 ​ ​ (2,113) ​ ​ — ​ ​ — ​ ​ 175,282 ​ $ (2,113) Corporate and other bonds (1) ​ 38,137 ​ (477) ​ 20,283 ​ (260) ​ 58,420 ​ (737) Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 33,827 ​ ​ (115) ​ ​ 446 ​ ​ (1) ​ ​ 34,273 ​ ​ (116) Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total commercial mortgage-backed securities ​ ​ 33,827 ​ ​ (115) ​ ​ 446 ​ ​ (1) ​ ​ 34,273 ​ ​ (116) Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 198,687 ​ ​ (1,407) ​ ​ 1,121 ​ ​ (3) ​ ​ 199,808 ​ ​ (1,410) Non-agency ​ ​ 57,044 ​ ​ (743) ​ ​ — ​ ​ — ​ ​ 57,044 ​ ​ (743) Total residential mortgage-backed securities ​ ​ 255,731 ​ ​ (2,150) ​ ​ 1,121 ​ ​ (3) ​ ​ 256,852 ​ ​ (2,153) Total AFS securities ​ $ 502,977 ​ $ (4,855) ​ $ 27,806 ​ $ (314) ​ $ 530,783 ​ $ (5,169) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 7,638 ​ $ (38) ​ $ — ​ $ — ​ $ 7,638 ​ $ (38) Obligations of states and political subdivisions ​ ​ 4,526 ​ ​ (29) ​ ​ — ​ ​ — ​ ​ 4,526 ​ ​ (29) Corporate and other bonds (1) ​ 17,323 ​ (83) ​ 19,901 ​ (291) ​ 37,224 ​ (374) Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 43,552 ​ ​ (530) ​ ​ 14,966 ​ ​ (89) ​ ​ 58,518 ​ ​ (619) Non-agency ​ ​ 11,162 ​ ​ (24) ​ ​ — ​ ​ — ​ ​ 11,162 ​ ​ (24) Total commercial mortgage-backed securities ​ ​ 54,714 ​ ​ (554) ​ ​ 14,966 ​ ​ (89) ​ ​ 69,680 ​ ​ (643) Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 114,147 ​ ​ (500) ​ ​ 40,168 ​ ​ (316) ​ ​ 154,315 ​ ​ (816) Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total residential mortgage-backed securities ​ ​ 114,147 ​ ​ (500) ​ ​ 40,168 ​ ​ (316) ​ ​ 154,315 ​ ​ (816) Total AFS securities ​ $ 198,348 ​ $ (1,204) ​ $ 75,035 ​ $ (696) ​ $ 273,383 ​ $ (1,900) (1) Other bonds includes asset-backed securities. ​ As of September 30, 2020, there were $27.8 million, or 18 issues, of individual AFS securities that had been in a continuous loss position for more than 12 months and had an aggregate unrealized loss of $314,000 . As of December 31, 2019, there were $75.0 million, or 47 issues, of individual securities that had been in a continuous loss position for more than 12 months and had an aggregate unrealized loss of $696,000 . The Company has evaluated AFS securities in an unrealized loss position for credit related impairment at September 30, 2020 and December 31, 2019 and concluded no impairment existed based on several factors which included: (1) the majority of these securities are of high credit quality, (2) unrealized losses are primarily the result of market volatility, (3) the contractual terms of the investments do not permit the issuer(s) to settle the securities at a price less than the cost basis of each investment, (4) issuers continue to make timely principal and interest payments, and (5) the Company does not intend to sell any of the investments and the accounting standard of “more likely than not” has not been met for the Company to be required to sell any of the investments before recovery of its amortized cost basis. Additionally, the majority of the Company’s mortgage-backed securities are issued by FNMA, FHLMC, and GNMA and do not have credit risk given the implicit and explicit government guarantees associated with these agencies. In addition, the non-agency mortgage-backed securities generally received a 20% SSFA rating. ​ The following table presents the amortized cost and estimated fair value of AFS securities as of September 30, 2020 and December 31, 2019, by contractual maturity. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ December 31, 2019 ​ Amortized Estimated Amortized Estimated ​ ​ Cost ​ Fair Value ​ Cost ​ Fair Value Due in one year or less ​ $ 28,581 ​ $ 28,834 ​ $ 35,177 ​ $ 35,329 Due after one year through five years ​ 140,844 ​ 148,114 ​ 164,605 ​ 166,873 Due after five years through ten years ​ 251,501 ​ 258,806 ​ 249,713 ​ 254,790 Due after ten years ​ 1,931,990 ​ 2,007,586 ​ 1,443,932 ​ 1,488,453 Total AFS securities ​ $ 2,352,916 ​ $ 2,443,340 ​ $ 1,893,427 ​ $ 1,945,445 ​ Refer to Note 8 "Commitments and Contingencies" for information regarding the estimated fair value of AFS securities that were pledged to secure public deposits, repurchase agreements, and for other purposes as permitted or required by law as of September 30, 2020 and December 31, 2019. Held to Maturity The Company’s HTM investment portfolio primarily consists of highly-rated municipal securities and the estimated credit loss inherent in the portfolio is currently immaterial. The Company’s HTM securities were all current, with no securities past due or on non-accrual at September 30, 2020. ​ The Company reports HTM securities on the Company’s Consolidated Balance Sheets at carrying value. Carrying value is amortized cost, which includes any unamortized unrealized gains and losses recognized in accumulated other comprehensive income prior to reclassifying the securities from AFS securities to HTM securities. Investment securities transferred into the HTM category from the AFS category are recorded at fair value at the date of transfer. The unrealized holding gain or loss at the date of transfer is retained in accumulated other comprehensive income and in the carrying value of the HTM securities. Such unrealized gains or losses are accreted over the remaining life of the security with no impact on future net income. ​ The carrying value, gross unrealized gains and losses, and estimated fair values of HTM securities as of September 30, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Gross Unrealized ​ Estimated ​ Value Gains (Losses) ​ Fair Value September 30, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 2,767 ​ $ — ​ $ (14) ​ $ 2,753 Obligations of states and political subdivisions ​ ​ 538,352 ​ ​ 67,561 ​ ​ — ​ ​ 605,913 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 5,542 ​ ​ 5 ​ ​ (40) ​ ​ 5,507 Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total commercial mortgage-backed securities ​ ​ 5,542 ​ ​ 5 ​ ​ (40) ​ ​ 5,507 Total held-to-maturity securities ​ $ 546,661 ​ $ 67,566 ​ $ (54) ​ $ 614,173 ​ The carrying value, gross unrealized gains and losses, and estimated fair values of HTM securities as of December 31, 2019 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Gross Unrealized ​ Estimated ​ Value Gains (Losses) Fair Value December 31, 2019 ​ ​ ​ ​ U.S. government and agency securities ​ $ 2,813 ​ $ 26 ​ $ — ​ $ 2,839 Obligations of states and political subdivisions ​ ​ 545,148 ​ ​ 48,274 ​ ​ — ​ ​ 593,422 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 7,183 ​ ​ 59 ​ ​ — ​ ​ 7,242 Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total commercial mortgage-backed securities ​ ​ 7,183 ​ ​ 59 ​ ​ — ​ ​ 7,242 Total held-to-maturity securities ​ $ 555,144 ​ $ 48,359 ​ $ — ​ $ 603,503 ​ ​ ​ Credit Quality Indicators & Allowance for Credit Losses - HTM ​ For HTM securities, the Company evaluates the credit risk of its securities on at least a quarterly basis. The Company estimates expected credit losses on HTM debt securities on an individual basis based on the PD/LGD methodology primarily using security-level credit ratings. The Company’s HTM securities ACL was immaterial at the adoption of ASC 326. The Company re-evaluated the HTM securities ACL and concluded no additional reserve was needed at September 30, 2020. The primary indicators of credit quality for the Company’s HTM portfolio are security type and credit rating, which is influenced by a number of factors including obligor cash flow, geography, seniority, and others. The Company’s only HTM securities with credit risk are obligations of states and political subdivisions. ​ The following table presents the amortized cost of HTM securities as of September 30, 2020 by security type and credit rating (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2020 ​ U.S. Government and Agency Obligations of states and political Mortgage-backed ​ Total HTM ​ ​ securities ​ subdivisions ​ securities ​ securities Credit Rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ AAA/AA/A ​ $ — ​ $ 533,742 ​ $ — ​ $ 533,742 Not Rated - Agency (1) ​ ​ 2,767 ​ ​ — ​ ​ 5,542 ​ ​ 8,309 Not Rated - Non-Agency ​ ​ — ​ 4,610 ​ ​ — ​ ​ 4,610 Total ​ $ 2,767 ​ $ 538,352 ​ $ 5,542 ​ $ 546,661 (1) Generally considered not to have credit risk given the government guarantees associated with these agencies ​ The following table presents the amortized cost and estimated fair value of HTM securities as of September 30, 2020 and December 31, 2019, by contractual maturity. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ December 31, 2019 ​ Carrying Estimated Carrying Estimated ​ ​ Value ​ Fair Value ​ Value ​ Fair Value Due in one year or less ​ $ 1,005 ​ $ 1,024 ​ $ 502 ​ $ 504 Due after one year through five years ​ 9,076 ​ 9,436 ​ 10,258 ​ 10,539 Due after five years through ten years ​ 1,749 ​ 1,796 ​ 1,768 ​ 1,800 Due after ten years ​ 534,831 ​ 601,917 ​ 542,616 ​ 590,660 Total HTM securities ​ $ 546,661 ​ $ 614,173 ​ $ 555,144 ​ $ 603,503 ​ Refer to Note 8 "Commitments and Contingencies" for information regarding the estimated fair value of HTM securities that were pledged to secure public deposits as permitted or required by law as of September 30, 2020 and December 31, 2019. Restricted Stock, at cost Due to restrictions placed upon the Bank’s common stock investment in the Federal Reserve Bank and FHLB, these securities have been classified as restricted equity securities and carried at cost. These restricted securities are not subject to the investment security classifications and are included as a separate line item on the Company’s Consolidated Balance Sheets. At September 30, 2020 and December 31, 2019, the FHLB required the Bank to maintain stock in an amount equal to 4.25% of outstanding borrowings and a specific percentage of the Bank’s total assets. The Federal Reserve Bank required the Bank to maintain stock with a par value equal to 6% of the Bank’s outstanding capital at both September 30, 2020 and December 31, 2019. Restricted equity securities consist of Federal Reserve Bank stock in the amount of $67.0 million for September 30, 2020 and December 31, 2019 and FHLB stock in the amount of $45.2 million and $63.9 million as of September 30, 2020 and December 31, 2019, respectively. Realized Gains and Losses The following table presents the gross realized gains and losses on and the proceeds from the sale of securities during the three and nine months ended September 30, 2020 and 2019 (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ ​ September 30, 2020 ​ September 30, 2020 Realized gains (losses): ​ ​ Gross realized gains ​ $ 18 ​ $ 12,522 Gross realized losses ​ — ​ (229) Net realized gains ​ $ 18 ​ $ 12,293 ​ ​ ​ ​ ​ ​ ​ Proceeds from sales of securities ​ $ 4,675 ​ $ 232,946 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ ​ September 30, 2019 ​ September 30, 2019 Realized gains (losses): ​ ​ Gross realized gains ​ $ 7,104 ​ $ 9,161 Gross realized losses ​ — ​ (1,855) Net realized gains ​ $ 7,104 ​ $ 7,306 ​ ​ ​ ​ ​ ​ ​ Proceeds from sales of securities ​ $ 98,975 ​ $ 486,925 ​ ​

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	9 Months Ended
	Sep. 30, 2020
Loans and Allowance for Loan Losses [Abstract]
LOANS AND ALLOWANCE FOR LOAN LOSSES	4. LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES On January 1, 2020, the Company adopted ASC 326. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables. For further discussion on the Company’s accounting policies and policy elections related to the accounting standard update refer to Note 1 “Accounting Policies” in this Quarterly Report. All loan information presented as of September 30, 2020 is in accordance with ASC 326. All loan information presented prior to January 1, 2020 is in accordance with previous applicable GAAP. During March 2020, in response to the economic fallout from the COVID-19 pandemic, the CARES Act was passed by Congress and signed into law by the President along with the March 22 Joint Guidance that provided enhanced guidelines and accounting for COVID-19 related modifications. For further discussion on the CARES Act and the March 22 Joint Guidance and related loan impact refer to Note 1 “Accounting Polices” in this Quarterly Report. The information included below reflects the impact of the CARES Act and the March 22 Joint Guidance. ​ ​ The Company’s loans are stated at their face amount, net of deferred fees and costs, and consist of the following at September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 December 31, 2019 Construction and Land Development ​ $ 1,207,190 ​ $ 1,250,924 Commercial Real Estate - Owner Occupied ​ 2,107,333 ​ 2,041,243 Commercial Real Estate - Non-Owner Occupied ​ 3,497,929 ​ 3,286,098 Multifamily Real Estate ​ 731,582 ​ 633,743 Commercial & Industrial (1) ​ 3,536,249 ​ 2,114,033 Residential 1-4 Family - Commercial ​ 696,944 ​ 724,337 Residential 1-4 Family - Consumer ​ 830,144 ​ 890,503 Residential 1-4 Family - Revolving ​ 618,320 ​ 659,504 Auto ​ 387,417 ​ 350,419 Consumer ​ 276,023 ​ 372,853 Other Commercial (1) ​ 494,084 ​ 287,279 Total loans held for investment, net of deferred fees and costs ​ ​ 14,383,215 ​ ​ 12,610,936 Allowance for loan and lease losses ​ ​ (174,122) ​ ​ (42,294) Total loans held for investment, net ​ $ 14,209,093 ​ $ 12,568,642 (1) Commercial & industrial and other commercial loans include approximately $1.6 billion and $21.3 million, respectively, in new loans from the PPP loan program at September 30, 2020. ​ The following table shows the aging of the Company’s loan portfolio, by class, at September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater than ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days and ​ ​ ​ ​ ​ ​ ​ ​ Current ​ Past Due ​ Past Due ​ still Accruing ​ Nonaccrual ​ Total Loans Construction and Land Development ​ $ 1,200,729 ​ $ 2,625 ​ $ 223 ​ $ 93 ​ $ 3,520 ​ $ 1,207,190 Commercial Real Estate - Owner Occupied ​ 2,090,106 ​ 4,924 ​ 1,310 ​ 1,726 ​ 9,267 ​ 2,107,333 Commercial Real Estate - Non-Owner Occupied ​ 3,493,107 ​ 1,291 ​ 1,371 ​ 168 ​ 1,992 ​ 3,497,929 Multifamily Real Estate ​ 731,190 ​ — ​ — ​ 359 ​ 33 ​ 731,582 Commercial & Industrial ​ 3,528,283 ​ 4,322 ​ 1,448 ​ 604 ​ 1,592 ​ 3,536,249 Residential 1-4 Family - Commercial ​ 683,730 ​ 1,236 ​ 937 ​ 5,298 ​ 5,743 ​ 696,944 Residential 1-4 Family - Consumer ​ 806,055 ​ 2,998 ​ 3,976 ​ 4,495 ​ 12,620 ​ 830,144 Residential 1-4 Family - Revolving ​ 608,570 ​ 2,669 ​ 1,141 ​ 2,276 ​ 3,664 ​ 618,320 Auto ​ 384,619 ​ 1,513 ​ 453 ​ 315 ​ 517 ​ 387,417 Consumer ​ 273,829 ​ 1,020 ​ 772 ​ 327 ​ 75 ​ 276,023 Other Commercial ​ ​ 493,044 ​ ​ 613 ​ ​ 427 ​ ​ — ​ ​ — ​ ​ 494,084 Total loans held for investment ​ $ 14,293,262 ​ $ 23,211 ​ $ 12,058 ​ $ 15,661 ​ $ 39,023 ​ $ 14,383,215 ​ These balances reflect the impact of the CARES Act and the March 22 Joint Guidance which provides relief for TDR designations and also provides guidance on past due reporting for modified loans. ​ The following table shows the Company’s amortized cost basis of loans on nonaccrual status as of January 1, 2020 as well as amortized cost basis of loans on nonaccrual status and loans past due 90 days and still accruing as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonaccrual ​ ​ ​ ​ ​ ​ ​ ​ January 1, 2020 ​ September 30, 2020 ​ Nonaccrual With No ALLL ​ 90 Days and still Accruing Construction and Land Development ​ $ 4,060 ​ $ 3,520 ​ $ 1,985 ​ $ 93 Commercial Real Estate - Owner Occupied ​ ​ 13,889 ​ ​ 9,267 ​ ​ 1,994 ​ ​ 1,726 Commercial Real Estate - Non-Owner Occupied ​ ​ 1,368 ​ ​ 1,992 ​ ​ — ​ ​ 168 Multifamily Real Estate ​ ​ — ​ ​ 33 ​ ​ — ​ ​ 359 Commercial & Industrial ​ ​ 3,037 ​ ​ 1,592 ​ ​ — ​ ​ 604 Residential 1-4 Family - Commercial ​ ​ 6,492 ​ ​ 5,743 ​ ​ 1,738 ​ ​ 5,298 Residential 1-4 Family - Consumer ​ ​ 13,117 ​ ​ 12,620 ​ ​ 1,069 ​ ​ 4,495 Residential 1-4 Family - Revolving ​ ​ 2,490 ​ ​ 3,664 ​ ​ 60 ​ ​ 2,276 Auto ​ ​ 565 ​ ​ 517 ​ ​ — ​ ​ 315 Consumer ​ ​ 88 ​ ​ 75 ​ ​ — ​ ​ 327 Other Commercial ​ ​ 98 ​ ​ — ​ ​ — ​ ​ — Total loans held for investment ​ $ 45,204 ​ $ 39,023 ​ $ 6,846 ​ $ 15,661 ​ ​ There was no interest income recognized on nonaccrual loans during the three or nine months ended September 30, 2020. See Note 1 “Summary of Significant Accounting Policies” in the Company’s 2019 Form 10-K for additional information on the Company’s policies for nonaccrual loans. ​ ​ Troubled Debt Restructurings ​ The CARES Act permits financial institutions to suspend requirements under GAAP for loan modifications to borrowers affected by COVID-19 that would otherwise be characterized as TDRs and suspend any determination related thereto if (i) the loan modification is made between March 1, 2020 and the earlier of December 31, 2020 or 60 days after the end of the COVID-19 emergency declaration and (ii) the applicable loan was not more than 30 days past due as of December 31, 2019. In addition, federal bank regulatory authorities have issued guidance to encourage financial institutions to make loan modifications for borrowers affected by COVID-19 and have assured financial institutions that they will neither receive supervisory criticism for such prudent loan modifications, nor be required by examiners to automatically categorize COVID-19-related loan modifications as TDRs. As of September 30, 2020, the Company had approximately $769.6 million in loans still under their modified terms. The Company’s modification program primarily included payment deferrals and interest only modifications. In addition to the above mentioned modifications, as of September 30, 2020, the Company has TDRs totaling $21.6 million with an estimated $2.7 million of allowance for those loans for the current period. ​ A modification of a loan’s terms constitutes a TDR if the creditor grants a concession that it would not otherwise consider to the borrower for economic or legal reasons related to the borrower’s financial difficulties. All loans that are considered to be TDRs are evaluated for credit losses in accordance with the Company’s ALLL methodology. For the three and nine months ended September 30, 2020, the recorded investment in TDRs prior to modifications was not materially impacted by the modifications. ​ The following table provides a summary, by class, of TDRs that continue to accrue interest under the terms of the applicable restructuring agreement, which are considered to be performing, and TDRs that have been placed on nonaccrual status, which are considered to be nonperforming, as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ No. of Recorded Outstanding ​ ​ Loans ​ Investment ​ Commitment Performing ​ ​ Construction and Land Development 4 ​ $ 219 ​ $ — Commercial Real Estate - Owner Occupied 6 ​ 2,140 ​ 101 Commercial Real Estate - Non-Owner Occupied 1 ​ 1,089 ​ — Commercial & Industrial 5 ​ 1,117 ​ — Residential 1-4 Family - Commercial 3 ​ 247 ​ — Residential 1-4 Family - Consumer 80 ​ 9,165 ​ — Residential 1-4 Family - Revolving 2 ​ 55 ​ — Consumer 5 ​ 31 ​ — Other Commercial ​ 1 ​ ​ 452 ​ ​ — Total performing 107 ​ $ 14,515 ​ $ 101 Nonperforming ​ ​ Commercial Real Estate - Owner Occupied 2 ​ $ 293 ​ $ — Commercial Real Estate - Non-Owner Occupied ​ 1 ​ ​ 137 ​ ​ — Commercial & Industrial 3 ​ 261 ​ — Residential 1-4 Family - Commercial 4 ​ 1,313 ​ — Residential 1-4 Family - Consumer 23 ​ 4,937 ​ — Residential 1-4 Family - Revolving 3 ​ 104 ​ — Total nonperforming 36 ​ $ 7,045 ​ $ — Total performing and nonperforming 143 ​ $ 21,560 ​ $ 101 ​ ​ The Company considers a default of a TDR to occur when the borrower is 90 days past due following the restructure or a foreclosure and repossession of the applicable collateral occurs. During the three and nine months ended September 30, 2020, the Company did not have any material loans that went into default that had been restructured in the twelve-month period prior to the time of default. ​ The following table shows, by class and modification type, TDRs that occurred during the three and nine months ended September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended September 30, 2020 ​ Nine Months Ended September 30, 2020 ​ ​ Recorded ​ Recorded ​ ​ No. of ​ Investment at ​ No. of ​ Investment at ​ ​ Loans ​ Period End ​ Loans ​ Period End Modified to interest only, at a market rate ​ ​ Commercial Real Estate - Owner Occupied ​ — ​ $ — ​ 1 ​ $ 272 Residential 1-4 Family - Commercial ​ 1 ​ ​ 652 ​ 1 ​ ​ 652 Total interest only at market rate of interest 1 ​ $ 652 2 ​ $ 924 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, at a market rate ​ ​ Commercial & Industrial — ​ $ — 3 ​ $ 127 Residential 1-4 Family - Commercial 1 ​ ​ 299 1 ​ ​ 299 Residential 1-4 Family - Consumer — ​ — 4 ​ 324 Consumer ​ — ​ ​ — ​ 1 ​ ​ 10 Total loan term extended at a market rate 1 ​ $ 299 9 ​ $ 760 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ ​ Construction and Land Development ​ — ​ $ — ​ 1 ​ $ 34 Commercial & Industrial 1 ​ 143 2 ​ 358 Residential 1-4 Family - Commercial ​ 1 ​ ​ 290 ​ 1 ​ ​ 290 Residential 1-4 Family - Consumer 4 ​ ​ 423 17 ​ ​ 2,387 Residential 1-4 Family - Revolving — ​ — 1 ​ 52 Total loan term extended at a below market rate 6 ​ $ 856 22 ​ $ 3,121 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate modification, below market rate ​ ​ Total interest only at below market rate of interest — ​ $ — — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total 8 ​ $ 1,807 33 ​ $ 4,805 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for Loan and Lease Losses ​ ALLL on the loan portfolio is a material estimate for the Company. The Company estimates its ALLL on its loan portfolio on a quarterly basis. The Company models the ALLL using two primary segments, Commercial and Consumer. Within each segment, loan classes are further identified based on similar risk characteristics. The Company has identified the following classes within each segment: ● Commercial : Construction and Land Development, Commercial Real Estate – Owner Occupied, Commercial Real Estate – Non-Owner Occupied, Multifamily Real Estate, Commercial & Industrial, Residential 1-4 Family – Commercial, and Other Commercial ● Consumer : Residential 1-4 Family – Consumer, Residential 1-4 Family – Revolving, Auto, and Consumer ​ The following tables show the ALLL activity by segment for the three and nine months ended September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2020 ​ Nine Months Ended September 30, 2020 ​ ​ Commercial ​ Consumer ​ Total ​ Commercial ​ Consumer ​ Total Balance at beginning of period ​ $ 111,954 ​ $ 58,023 ​ $ 169,977 ​ $ 30,941 ​ $ 11,353 ​ $ 42,294 Impact of ASC 326 adoption on non-PCD loans ​ — ​ — ​ — ​ 4,432 ​ 40,666 ​ 45,098 Impact of ASC 326 adoption on PCD loans ​ — ​ — ​ — ​ 1,752 ​ 634 ​ 2,386 Impact of adopting ASC 326 ​ — ​ — ​ — ​ 6,184 ​ 41,300 ​ 47,484 Loans charged-off ​ (995) ​ (1,983) ​ (2,978) ​ (5,553) ​ (9,253) ​ (14,806) Recoveries credited to allowance ​ 718 ​ 848 ​ 1,566 ​ 2,580 ​ 2,557 ​ 5,137 Provision charged to operations ​ 14,978 ​ (9,421) ​ 5,557 ​ 92,503 ​ 1,510 ​ 94,013 Balance at end of period ​ $ 126,655 ​ $ 47,467 ​ $ 174,122 ​ $ 126,655 ​ $ 47,467 ​ $ 174,122 Credit Quality Indicators ​ Credit quality indicators are utilized to help estimate the collectability of each loan class within the Commercial and Consumer segments. For classes of loans within the Commercial segment, the primary credit quality indicator used for evaluating credit quality and estimating the ALLL is risk rating categories of Pass, Watch & Special Mention, Substandard, and Doubtful. For classes of loans within the Consumer segment, the primary credit quality indicator used for evaluating credit quality and estimating the ALLL is delinquency bands of Current, 30-59, 60-89, 90+, and Nonaccrual. While other credit quality indicators are evaluated and analyzed as part of the Company’s credit risk management activities, these indicators are primarily used in estimating the ALLL. The Company evaluates the credit risk of its loan portfolio on at least a quarterly basis. ​ Commercial Loans ​ The Company uses a risk rating system as the primary credit quality indicator for classes of loans within the Commercial segment. The risk rating system on a scale of 0 through 9 is used to determine risk level as used in the calculation of the allowance for credit loss. The risk levels, as described below, do not necessarily follow the regulatory definitions of risk levels with the same name. A general description of the characteristics of the risk levels follows: ​ Pass is determined by the following criteria: ● Risk rated 0 loans have little or no risk and are with General Obligation Municipal Borrowers; ● Risk rated 1 loans have little or no risk and are generally secured by cash or cash equivalents; ● Risk rated 2 loans have minimal risk to well qualified borrowers and no significant questions as to safety; ● Risk rated 3 loans are satisfactory loans with strong borrowers and secondary sources of repayment; ● Risk rated 4 loans are satisfactory loans with borrowers not as strong as risk rated 3 loans and may exhibit a greater degree of financial risk based on the type of business supporting the loan. ​ Watch & Special Mention is determined by the following criteria: ● Risk rated 5 loans are watch loans that warrant more than the normal level of supervision and have the possibility of an event occurring that may weaken the borrower’s ability to repay; ● Risk rated 6 loans have increasing potential weaknesses beyond those at which the loan originally was granted and if not addressed could lead to inadequately protecting the Company’s credit position. ​ Substandard is determined by the following criteria: ● Risk rated 7 loans are substandard loans and are inadequately protected by the current sound worth or paying capacity of the obligor or the collateral pledged; these have well defined weaknesses that jeopardize the liquidation of the debt with the distinct possibility the Company will sustain some loss if the deficiencies are not corrected. ​ Doubtful is determined by the following criteria: ● Risk rated 8 loans are doubtful of collection and the possibility of loss is high but pending specific borrower plans for recovery, its classification as a loss is deferred until its more exact status is determined; ● Risk rated 9 loans are loss loans which are considered uncollectable and of such little value that their continuance as bankable assets is not warranted. ​ The table below details the amortized cost of the classes of loans within the Commercial segment by risk level and year of origination as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total Construction and Land Development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 236,949 ​ $ 346,840 ​ $ 304,768 ​ $ 41,015 ​ $ 42,268 ​ $ 63,632 ​ $ 29,674 ​ $ 1,065,146 Watch & Special Mention ​ ​ 2,268 ​ ​ 67,572 ​ ​ 40,714 ​ ​ 347 ​ ​ 5,863 ​ ​ 16,549 ​ ​ 1,645 ​ ​ 134,958 Substandard ​ ​ — ​ ​ — ​ ​ 368 ​ ​ 710 ​ ​ 2,040 ​ ​ 3,968 ​ ​ — ​ ​ 7,086 Total Construction and Land Development ​ $ 239,217 ​ $ 414,412 ​ $ 345,850 ​ $ 42,072 ​ $ 50,171 ​ $ 84,149 ​ $ 31,319 ​ $ 1,207,190 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 226,090 ​ $ 369,661 ​ $ 304,296 ​ $ 243,299 ​ $ 143,786 ​ $ 616,113 ​ $ 23,577 ​ $ 1,926,822 Watch & Special Mention ​ ​ 2,002 ​ ​ 17,684 ​ ​ 23,479 ​ ​ 17,770 ​ ​ 31,406 ​ ​ 64,728 ​ ​ 2,599 ​ ​ 159,668 Substandard ​ ​ — ​ ​ 118 ​ ​ 1,099 ​ ​ 1,113 ​ ​ 1,039 ​ ​ 17,175 ​ ​ 299 ​ ​ 20,843 Total Commercial Real Estate - Owner Occupied ​ $ 228,092 ​ $ 387,463 ​ $ 328,874 ​ $ 262,182 ​ $ 176,231 ​ $ 698,016 ​ $ 26,475 ​ $ 2,107,333 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Non-Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 275,008 ​ $ 439,081 ​ $ 401,551 ​ $ 442,151 ​ $ 356,256 ​ $ 862,293 ​ $ 24,467 ​ $ 2,800,807 Watch & Special Mention ​ ​ 27,599 ​ ​ 104,352 ​ ​ 97,973 ​ ​ 71,618 ​ ​ 107,934 ​ ​ 259,591 ​ ​ 18,318 ​ ​ 687,385 Substandard ​ ​ — ​ ​ — ​ ​ 6,464 ​ ​ — ​ ​ 25 ​ ​ 3,248 ​ ​ — ​ ​ 9,737 Total Commercial Real Estate - Non-Owner Occupied ​ $ 302,607 ​ $ 543,433 ​ $ 505,988 ​ $ 513,769 ​ $ 464,215 ​ $ 1,125,132 ​ $ 42,785 ​ $ 3,497,929 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial & Industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,979,209 ​ $ 401,385 ​ $ 221,417 ​ $ 79,734 ​ $ 76,145 ​ $ 149,692 ​ $ 524,960 ​ $ 3,432,542 Watch & Special Mention ​ ​ 5,081 ​ ​ 29,405 ​ ​ 16,889 ​ ​ 4,163 ​ ​ 5,170 ​ ​ 6,443 ​ ​ 28,156 ​ ​ 95,307 Substandard ​ ​ 37 ​ ​ 928 ​ ​ 396 ​ ​ 129 ​ ​ 623 ​ ​ 2,710 ​ ​ 3,577 ​ ​ 8,400 Total Commercial & Industrial ​ $ 1,984,327 ​ $ 431,718 ​ $ 238,702 ​ $ 84,026 ​ $ 81,938 ​ $ 158,845 ​ $ 556,693 ​ $ 3,536,249 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multifamily Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 131,434 ​ $ 80,234 ​ $ 69,881 ​ $ 120,758 ​ $ 70,127 ​ $ 239,525 ​ $ 2,499 ​ $ 714,458 Watch & Special Mention ​ ​ 2,283 ​ ​ 1,018 ​ ​ 4,894 ​ ​ 2,490 ​ ​ 621 ​ ​ 5,427 ​ ​ — ​ ​ 16,733 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 391 ​ ​ — ​ ​ 391 Total Multifamily Real Estate ​ $ 133,717 ​ $ 81,252 ​ $ 74,775 ​ $ 123,248 ​ $ 70,748 ​ $ 245,343 ​ $ 2,499 ​ $ 731,582 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 78,631 ​ $ 100,919 ​ $ 76,284 ​ $ 87,277 ​ $ 76,710 ​ $ 226,118 ​ $ 1,251 ​ $ 647,190 Watch & Special Mention ​ ​ 592 ​ ​ 4,625 ​ ​ 8,739 ​ ​ 4,420 ​ ​ 4,186 ​ ​ 15,798 ​ ​ — ​ ​ 38,360 Substandard ​ ​ 652 ​ ​ 810 ​ ​ 272 ​ ​ 2,060 ​ ​ 993 ​ ​ 6,119 ​ ​ 488 ​ ​ 11,394 Total Residential 1-4 Family - Commercial ​ $ 79,875 ​ $ 106,354 ​ $ 85,295 ​ $ 93,757 ​ $ 81,889 ​ $ 248,035 ​ $ 1,739 ​ $ 696,944 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 221,801 ​ $ 115,346 ​ $ 9,972 ​ $ 39,542 ​ $ 16,602 ​ $ 47,858 ​ $ 31,730 ​ $ 482,851 Watch & Special Mention ​ ​ 22 ​ ​ — ​ ​ 621 ​ ​ 1,312 ​ ​ 927 ​ ​ 8,351 ​ ​ — ​ ​ 11,233 Total Other Commercial ​ $ 221,823 ​ $ 115,346 ​ $ 10,593 ​ $ 40,854 ​ $ 17,529 ​ $ 56,209 ​ $ 31,730 ​ $ 494,084 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 3,149,122 ​ $ 1,853,466 ​ $ 1,388,169 ​ $ 1,053,776 ​ $ 781,894 ​ $ 2,205,231 ​ $ 638,158 ​ $ 11,069,816 Watch & Special Mention (1) ​ ​ 39,847 ​ ​ 224,656 ​ ​ 193,309 ​ ​ 102,120 ​ ​ 156,107 ​ ​ 376,887 ​ ​ 50,718 ​ ​ 1,143,644 Substandard ​ ​ 689 ​ ​ 1,856 ​ ​ 8,599 ​ ​ 4,012 ​ ​ 4,720 ​ ​ 33,611 ​ ​ 4,364 ​ ​ 57,851 Total Commercial ​ $ 3,189,658 ​ $ 2,079,978 ​ $ 1,590,077 ​ $ 1,159,908 ​ $ 942,721 ​ $ 2,615,729 ​ $ 693,240 ​ $ 12,271,311 ​ (1) Approximately 85.0% was comprised of Watch, which increased from December 31, 2019 due to the continued uncertainty of the COVID-19 pandemic on impacted industries. ​ Consumer Loans ​ For Consumer loans, the Company evaluates credit quality based on the delinquency status of the loan. The following table details the amortized cost of the classes of loans within the Consumer segment based on their delinquency status and year of origination as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total Residential 1-4 Family - Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 143,716 ​ $ 83,309 ​ $ 78,957 ​ $ 77,910 ​ $ 111,043 ​ $ 311,108 ​ $ 12 ​ $ 806,055 30-59 Days Past Due ​ ​ — ​ ​ 156 ​ ​ 1,648 ​ ​ 43 ​ ​ 263 ​ ​ 888 ​ ​ — ​ ​ 2,998 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ 708 ​ ​ 1,138 ​ ​ 67 ​ ​ 2,063 ​ ​ — ​ ​ 3,976 90+ Days Past Due ​ ​ 646 ​ ​ 1,574 ​ ​ — ​ ​ 313 ​ ​ 388 ​ ​ 1,574 ​ ​ — ​ ​ 4,495 Nonaccrual ​ ​ — ​ ​ — ​ ​ 708 ​ ​ 870 ​ ​ 774 ​ ​ 10,268 ​ ​ — ​ ​ 12,620 Total Residential 1-4 Family - Consumer ​ $ 144,362 ​ $ 85,039 ​ $ 82,021 ​ $ 80,274 ​ $ 112,535 ​ $ 325,901 ​ $ 12 ​ $ 830,144 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 11,456 ​ $ 4,160 ​ $ 2,019 ​ $ — ​ $ — ​ $ 644 ​ $ 590,291 ​ $ 608,570 30-59 Days Past Due ​ ​ — ​ ​ 36 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,633 ​ ​ 2,669 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,141 ​ ​ 1,141 90+ Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,276 ​ ​ 2,276 Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 314 ​ ​ 3,350 ​ ​ 3,664 Total Residential 1-4 Family - Revolving ​ $ 11,456 ​ $ 4,196 ​ $ 2,019 ​ $ — ​ $ — ​ $ 958 ​ $ 599,691 ​ $ 618,320 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 26,520 ​ $ 79,119 ​ $ 79,878 ​ $ 25,836 ​ $ 11,163 ​ $ 18,017 ​ $ 33,296 ​ $ 273,829 30-59 Days Past Due ​ ​ 37 ​ ​ 261 ​ ​ 444 ​ ​ 87 ​ ​ 24 ​ ​ 41 ​ ​ 126 ​ ​ 1,020 60-89 Days Past Due ​ ​ 38 ​ ​ 126 ​ ​ 273 ​ ​ 20 ​ ​ 25 ​ ​ 186 ​ ​ 104 ​ ​ 772 90+ Days Past Due ​ ​ — ​ ​ 19 ​ ​ 253 ​ ​ 32 ​ ​ 21 ​ ​ — ​ ​ 2 ​ ​ 327 Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ 74 ​ ​ — ​ ​ 75 Total Consumer ​ $ 26,595 ​ $ 79,525 ​ $ 80,848 ​ $ 25,975 ​ $ 11,234 ​ $ 18,318 ​ $ 33,528 ​ $ 276,023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Auto ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 129,176 ​ $ 126,243 ​ $ 62,569 ​ $ 37,390 ​ $ 20,505 ​ $ 8,736 ​ $ — ​ $ 384,619 30-59 Days Past Due ​ ​ 145 ​ ​ 490 ​ ​ 265 ​ ​ 288 ​ ​ 195 ​ ​ 130 ​ ​ — ​ ​ 1,513 60-89 Days Past Due ​ ​ 39 ​ ​ 132 ​ ​ 118 ​ ​ 116 ​ ​ 26 ​ ​ 22 ​ ​ — ​ ​ 453 90+ Days Past Due ​ ​ 29 ​ ​ 99 ​ ​ 62 ​ ​ 45 ​ ​ 53 ​ ​ 27 ​ ​ — ​ ​ 315 Nonaccrual ​ ​ 33 ​ ​ 128 ​ ​ 61 ​ ​ 107 ​ ​ 111 ​ ​ 77 ​ ​ — ​ ​ 517 Total Auto ​ $ 129,422 ​ $ 127,092 ​ $ 63,075 ​ $ 37,946 ​ $ 20,890 ​ $ 8,992 ​ $ — ​ $ 387,417 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 310,868 ​ $ 292,831 ​ $ 223,423 ​ $ 141,136 ​ $ 142,711 ​ $ 338,505 ​ $ 623,599 ​ $ 2,073,073 30-59 Days Past Due ​ ​ 182 ​ ​ 943 ​ ​ 2,357 ​ ​ 418 ​ ​ 482 ​ ​ 1,059 ​ ​ 2,759 ​ ​ 8,200 60-89 Days Past Due ​ ​ 77 ​ ​ 258 ​ ​ 1,099 ​ ​ 1,274 ​ ​ 118 ​ ​ 2,271 ​ ​ 1,245 ​ ​ 6,342 90+ Days Past Due ​ ​ 675 ​ ​ 1,692 ​ ​ 315 ​ ​ 390 ​ ​ 462 ​ ​ 1,601 ​ ​ 2,278 ​ ​ 7,413 Nonaccrual ​ ​ 33 ​ ​ 128 ​ ​ 769 ​ ​ 977 ​ ​ 886 ​ ​ 10,733 ​ ​ 3,350 ​ ​ 16,876 Total Consumer ​ $ 311,835 ​ $ 295,852 ​ $ 227,963 ​ $ 144,195 ​ $ 144,659 ​ $ 354,169 ​ $ 633,231 ​ $ 2,111,904 ​ The Company did not have any material revolving loans convert to term during the three and nine months ended September 30, 2020. ​ ​ Acquired Loans ​ The Company has purchased loans that, at the time of acquisition, exhibited more than insignificant credit deterioration since origination. The Company has elected to treat all loans that were previously identified as PCI as PCD. As of September 30, 2020, the amortized cost of the Company’s PCD loans totaled $68.8 million, which had an estimated ALLL of $4.7 million. ​ Prior to the adoption of ASC 326 The following table shows the aging of the Company’s loan portfolio, by class, at December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater than ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ still Accruing ​ PCI ​ Nonaccrual ​ Current ​ Total Loans Construction and Land Development ​ $ 4,563 ​ $ 482 ​ $ 189 ​ $ 10,944 ​ $ 3,703 ​ $ 1,231,043 ​ $ 1,250,924 Commercial Real Estate - Owner Occupied ​ 3,482 ​ 2,184 ​ 1,062 ​ 27,438 ​ 6,003 ​ 2,001,074 ​ 2,041,243 Commercial Real Estate - Non-Owner Occupied ​ 457 ​ — ​ 1,451 ​ 14,565 ​ 381 ​ 3,269,244 ​ 3,286,098 Multifamily Real Estate ​ 223 ​ — ​ 474 ​ 94 ​ — ​ 632,952 ​ 633,743 Commercial & Industrial ​ 8,698 ​ 1,598 ​ 449 ​ 1,579 ​ 1,735 ​ 2,099,974 ​ 2,114,033 Residential 1-4 Family - Commercial ​ 1,479 ​ 2,207 ​ 674 ​ 12,205 ​ 4,301 ​ 703,471 ​ 724,337 Residential 1-4 Family - Consumer ​ 16,244 ​ 3,072 ​ 4,515 ​ 14,713 ​ 9,292 ​ 842,667 ​ 890,503 Residential 1-4 Family - Revolving ​ 10,190 ​ 1,784 ​ 3,357 ​ 4,127 ​ 2,080 ​ 637,966 ​ 659,504 Auto ​ 2,525 ​ 236 ​ 272 ​ 4 ​ 563 ​ 346,819 ​ 350,419 Consumer ​ 2,128 ​ 1,233 ​ 953 ​ 668 ​ 77 ​ 367,794 ​ 372,853 Other Commercial ​ ​ 464 ​ ​ — ​ ​ — ​ ​ 344 ​ ​ 97 ​ ​ 286,374 ​ ​ 287,279 Total loans held for investment ​ $ 50,453 ​ $ 12,796 ​ $ 13,396 ​ $ 86,681 ​ $ 28,232 ​ $ 12,419,378 ​ $ 12,610,936 ​ The following table shows the PCI loan portfolios, by class and their delinquency status, at December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-89 Days Greater than ​ ​ ​ ​ ​ ​ Past Due ​ 90 Days ​ Current ​ Total Construction and Land Development ​ $ 136 ​ $ 343 ​ $ 10,465 ​ $ 10,944 Commercial Real Estate - Owner Occupied ​ 480 ​ 6,884 ​ 20,074 ​ 27,438 Commercial Real Estate - Non-Owner Occupied ​ 848 ​ 987 ​ 12,730 ​ 14,565 Multifamily Real Estate ​ — ​ — ​ 94 ​ 94 Commercial & Industrial ​ — ​ 989 ​ 590 ​ 1,579 Residential 1-4 Family - Commercial ​ 543 ​ 1,995 ​ 9,667 ​ 12,205 Residential 1-4 Family - Consumer ​ 927 ​ 1,781 ​ 12,005 ​ 14,713 Residential 1-4 Family - Revolving ​ 287 ​ 205 ​ 3,635 ​ 4,127 Auto ​ ​ — ​ ​ — ​ ​ 4 ​ ​ 4 Consumer ​ ​ — ​ ​ 9 ​ ​ 659 ​ ​ 668 Other Commercial ​ — ​ — ​ 344 ​ 344 Total ​ $ 3,221 ​ $ 13,193 ​ $ 70,267 ​ $ 86,681 ​ ​ As of December 31, 2019, the Company measured the amount of impairment by evaluating loans either in their collective homogeneous pools or individually. The following table shows the Company’s loans, excluding PCI loans, by class at December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ Unpaid ​ ​ ​ ​ Recorded ​ Principal ​ Related ​ ​ Investment ​ Balance ​ Allowance Loans without a specific allowance ​ ​ ​ Construction and Land Development ​ $ 5,877 ​ $ 7,174 ​ $ — Commercial Real Estate - Owner Occupied ​ 8,801 ​ 9,296 ​ — Commercial Real Estate - Non-Owner Occupied ​ 3,510 ​ 4,059 ​ — Commercial & Industrial ​ 3,668 ​ 3,933 ​ — Residential 1-4 Family - Commercial ​ 4,047 ​ 4,310 ​ — Residential 1-4 Family - Consumer ​ 8,420 ​ 9,018 ​ — Residential 1-4 Family - Revolving ​ 862 ​ 865 ​ — Total impaired loans without a specific allowance ​ $ 35,185 ​ $ 38,655 ​ $ — Loans with a specific allowance ​ ​ ​ Construction and Land Development ​ $ 984 ​ $ 1,032 ​ $ 49 Commercial Real Estate - Owner Occupied ​ 2,820 ​ 3,093 ​ 146 Commercial Real Estate - Non-Owner Occupied ​ 335 ​ 383 ​ 2 Commercial & Industrial ​ 2,568 ​ 2,590 ​ 619 Residential 1-4 Family - Commercial ​ 1,726 ​ 1,819 ​ 162 Residential 1-4 Family - Consumer ​ 12,026 ​ 12,670 ​ 1,242 Residential 1-4 Family - Revolving ​ 2,186 ​ 2,369 ​ 510 Auto ​ 563 ​ 879 ​ 221 Consumer ​ 168 ​ 336 ​ 46 Other Commercial ​ ​ 562 ​ ​ 567 ​ ​ 30 Total impaired loans with a specific allowance ​ $ 23,938 ​ $ 25,738 ​ $ 3,027 Total impaired loans ​ $ 59,123 ​ $ 64,393 ​ $ 3,027 ​ The following table shows the average recorded investment and interest income recognized for the Company’s loans, excluding PCI loans, by class for the three and nine months ended September 30, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ September 30, 2019 ​ September 30, 2019 ​ ​ ​ Interest ​ ​ Interest ​ ​ Average ​ Income ​ Average ​ Income ​ ​ Investment ​ Recognized ​ Investment ​ Recognized Construction and Land Development ​ $ 13,581 ​ $ 40 ​ $ 13,601 ​ $ 351 Commercial Real Estate - Owner Occupied ​ 13,301 ​ 85 ​ 13,436 ​ 339 Commercial Real Estate - Non-Owner Occupied ​ 2,748 ​ 26 ​ 3,543 ​ 82 Multifamily Real Estate ​ ​ 1,217 ​ ​ 15 ​ ​ 1,234 ​ ​ 46 Commercial & Industrial ​ 3,986 ​ 41 ​ 4,046 ​ 129 Residential 1-4 Family - Commercial ​ 6,334 ​ 41 ​ 6,521 ​ 125 Residential 1-4 Family - Consumer ​ 19,802 ​ 75 ​ 20,007 ​ 264 Residential 1-4 Family - Revolving ​ 2,125 ​ 5 ​ 2,242 ​ 31 Auto ​ 691 ​ — ​ 781 ​ 9 Consumer ​ 184 ​ 2 ​ 192 ​ 5 Other Commercial ​ ​ 570 ​ ​ 7 ​ ​ 579 ​ ​ 21 Total impaired loans ​ $ 64,539 ​ $ 337 ​ $ 66,182 ​ $ 1,402 ​ At December 31, 2019, the Company considered TDRs to be impaired loans. A modification of a loan’s terms constitutes a TDR if the creditor grants a concession that it would not otherwise consider to the borrower for economic or legal reasons related to the borrower’s financial difficulties. All loans that are considered to be TDRs are evaluated for impairment in accordance with the Company’s allowance for credit loss methodology. The following table provides a summary, by class, of TDRs that continue to accrue interest under the terms of the applicable restructuring agreement, which are considered to be performing, and TDRs that have been placed on nonaccrual status, which are considered to be nonperforming, as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ No. of Recorded Outstanding ​ ​ Loans ​ Investment ​ Commitment Performing ​ ​ Construction and Land Development 4 ​ $ 1,114 ​ $ — Commercial Real Estate - Owner Occupied 6 ​ 2,228 ​ 26 Commercial Real Estate - Non-Owner Occupied 1 ​ 1,089 ​ — Commercial & Industrial 4 ​ 1,020 ​ — Residential 1-4 Family - Commercial 5 ​ 290 ​ — Residential 1-4 Family - Consumer 69 ​ 9,396 ​ — Residential 1-4 Family - Revolving 2 ​ 56 ​ — Consumer 4 ​ 29 ​ — Other Commercial ​ 1 ​ ​ 464 ​ ​ — Total performing 96 ​ $ 15,686 ​ $ 26 Nonperforming ​ ​ Commercial Real Estate - Owner Occupied 2 ​ $ 176 ​ $ — Commercial & Industrial 1 ​ 55 ​ — Residential 1-4 Family - Consumer 19 ​ 3,522 ​ — Residential 1-4 Family - Revolving 2 ​ 57 ​ — Total nonperforming 24 ​ $ 3,810 ​ $ — Total performing and nonperforming 120 ​ $ 19,496 ​ $ 26 ​ The Company considers a default of a TDR to occur when the borrower is 90 days past due following the restructuring or a foreclosure and repossession of the applicable collateral occurs. During the three and nine months ended September 30, 2019 the Company did not have any material loans that went into default that had been restructured in the twelve-month period prior to the time of default. ​ The following table shows, by class and modification type, TDRs that occurred during the three and nine months ended September 30, 20 19 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended September 30, 2019 ​ Nine Months Ended September 30, 2019 ​ ​ Recorded ​ Recorded ​ ​ No. of ​ Investment at ​ No. of ​ Investment at ​ ​ Loans ​ Period End ​ Loans ​ Period End Modified to interest only, at a market rate ​ ​ Total interest only at market rate of interest — ​ $ — — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, at a market rate ​ ​ Commercial & Industrial ​ 1 ​ $ 376 1 ​ $ 376 Residential 1-4 Family - Commercial — ​ ​ — 1 ​ ​ 73 Residential 1-4 Family - Consumer 1 ​ 461 4 ​ 761 Consumer 2 ​ 18 3 ​ 26 Total loan term extended at a market rate 4 ​ $ 855 9 ​ $ 1,236 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ter

INTANGIBLE ASSETS

INTANGIBLE ASSETS	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	5. INTANGIBLE ASSETS The Company’s intangible assets consist of core deposits, goodwill, and other intangibles arising from acquisitions. The Company has determined that core deposit intangibles have finite lives and amortizes them over their estimated useful lives. Core deposit intangibles are being amortized over the period of expected benefit, which ranges from 4 to 10 years , using an accelerated method. Other amortizable intangible assets are being amortized over the period of expected benefit, which ranges from 4 to 10 years , using various methods. In accordance with ASC 350, Intangibles-Goodwill and Other , the Company reviews the carrying value of indefinite lived intangible assets at least annually or more frequently if certain impairment indicators exist. The COVID-19 pandemic has disrupted the economy and created significant volatility in the financial markets. The volatility in the financial markets has adversely affected the Company’s expected future cash flows, due to the lower interest rate environment and other factors, and resulted in a decline in the market price of the Company’s common stock, along with others in the financial services industry. The Company performed its annual impairment testing in the second quarter of 2020 and, while the fair value of the reporting unit declined from the prior test, the Company determined that there was no impairment to its goodwill or intangible assets. In the normal course of business, the Company routinely monitors the impact of the changes in the financial markets and includes these assessments in the Company’s goodwill impairment process. Amortization expense of intangibles for the three and nine months ended September 30, 2020 totaled $4.1 million and $12.7 million, respectively; and for the three and nine months ended September 30, 2019 totaled $4.8 million and $13.9 million, respectively. As of September 30, 2020, the estimated remaining amortization expense of intangibles is as follows for the years ending (dollars in thousands): ​ ​ ​ ​ For the remaining three months of 2020 $ 3,883 2021 ​ ​ 13,874 2022 ​ ​ 11,490 2023 ​ ​ 9,687 2024 ​ ​ 7,819 Thereafter ​ ​ 14,315 Total estimated amortization expense ​ $ 61,068 ​ ​ ​

LEASES

LEASES	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
LEASES	6. LEASES The Company enters into both lessor and lessee arrangements and determines if an arrangement is a lease at inception. As both a lessee and lessor, the Company elected the practical expedient permitted under the transition guidance within the standard to account for lease and non-lease components as a single lease component for all asset classes. Lessor Arrangements The Company’s lessor arrangements consist of sales-type and direct financing leases for equipment. Lease payment terms are fixed and are typically payable in monthly installments with terms ranging from 31 to 125 months . The lease arrangements may contain renewal options and purchase options that allow the lessee to purchase the leased equipment at the end of the lease term. The leases generally do not contain non-lease components. The Company has no lease transactions with related parties. At lease inception the Company estimates the expected residual value of the leased property at the end of the lease term by considering both internal and third-party appraisals. In certain cases, the Company obtains lessee-provided residual value guarantees and third-party RVI to reduce its residual asset risk. At September 30, 2020 the carrying value of residual assets covered by residual value guarantees and RVI was $14.2 million. ​ The net investment in sales-type and direct financing leases consists of the carrying amount of the lease receivables plus unguaranteed residual assets, net of unearned income and any deferred selling profit on direct financing leases. The lease receivables include the lessor’s right to receive lease payments and the guaranteed residual asset value the lessor expects to derive from the underlying assets at the end of the lease term. At September 30, 2020, the total net investment in sales-type and direct financing leases was $146.5 million, comprised of $142.1 million in lease receivables and $4.4 million in unguaranteed residuals. There were no significant changes in the balance of the Company’s unguaranteed residual assets for the period ending September 30, 2020. The Company’s net investment in sales-type and direct financing leases are included in Loans Held for Investment (net of deferred fees and costs) on the Company’s Consolidated Balance Sheets. For the three and nine months ended September 30, 2020, total lease income was $782,000 and $1.1 million, respectively, and is recorded within Interest Income on the Company’s Consolidated Statements of Income. There was no lease income for the three and nine months ended September 30, 2019. ​ Lessee Arrangements The Company’s lessee arrangements consist of operating and finance leases; however, the majority of the leases have been classified as non-cancellable operating leases and are primarily for real estate leases with remaining lease terms of up to 25 years . The Company’s real estate lease agreements do not contain residual value guarantees and most agreements do not contain restrictive covenants. The Company does not have any material arrangements where the Company is in a sublease contract. ​ Lessee arrangements with an initial term of twelve months or less are not recorded on the Consolidated Balance Sheets. The ROU Assets and lease liabilities associated with operating and finance leases greater than twelve months are recorded in the Company’s Consolidated Balance Sheets; ROU Assets within Other Assets and lease liabilities within Other Liabilities. ROU Assets represent the Company’s right to use an underlying asset over the course of the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The initial measurement of lease liabilities and ROU Assets are the same for operating and finance leases. Lease liabilities are recognized at the commencement date based on the present value of the remaining lease payments, discounted using the incremental borrowing rate. As most of the Company’s leases do not provide an implicit rate, the Company uses an incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. ROU Assets are recognized at commencement date based on the initial measurement of the lease liability, any lease payments made excluding lease incentives, and any initial direct costs incurred. Most of the Company’s operating leases include one or more options to renew. The Company is reasonably certain to exercise those options, they are included in the measurement of the operating ROU Assets and lease liabilities. ​ Lease expense for operating lease payments is recognized on a straight-line basis over the lease term and recorded in Occupancy Expense within noninterest expense on the Company’s Consolidated Statements of Income. Finance lease expenses consist of straight-line amortization expense of the ROU Assets recognized over the lease term and interest expense on the lease liability. Total finance lease expenses for the amortization of the ROU Assets are recorded in Occupancy Expense within noninterest expense on the Company’s Consolidated Statements of Income and interest expense on the finance lease liability is recorded in Interest Expense on Long-Term Borrowings within total interest expense on the Company’s Consolidated Statements of Income. ​ As of September 30, 2020, the Company had no sales leaseback transactions or leases that have no t yet commenced that create significant rights and obligations. The tables below provide information about the Company’s lessee lease portfolio and other supplemental lease information (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ December 31, 2019 ​ ​ Operating ​ ​ Finance ​ ​ ​ Operating Right-of-use-assets ​ $ 53,948 ​ ​ $ 7,654 ​ ​ $ 54,941 ​ Lease liabilities ​ ​ 64,757 ​ ​ ​ 10,590 ​ ​ ​ 66,052 ​ Lease Term and Discount Rate of Operating leases: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average remaining lease term (years) ​ 7.41 ​ ​ ​ 8.33 ​ ​ ​ 7.36 ​ Weighted-average discount rate (1) ​ 2.26 % ​ ​ 1.17 % ​ ​ 2.69 % (1) An incremental borrowing rate is used based on information available at commencement date of lease or at remeasurement date. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, ​ 2020 ​ 2019 Cash paid for amounts included in measurement of lease liabilities: ​ ​ ​ ​ ​ ​ Operating Cash Flows from Finance Leases ​ $ 41 ​ $ - Operating Cash Flows from Operating Leases ​ 10,398 ​ ​ 10,327 Right-of-use assets obtained in exchange for lease obligations: ​ ​ ​ ​ ​ Operating leases ​ 7,566 ​ ​ 5,979 Finance leases ​ ​ 10,549 ​ ​ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, ​ Nine months ended September 30, ​ ​ ​ 2020 ​ ​ 2019 ​ ​ 2020 ​ ​ 2019 Net Operating Lease Cost ​ $ 2,536 ​ $ 2,928 ​ $ 8,383 ​ $ 8,940 Finance Lease Cost: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of right-of-use assets ​ ​ 230 ​ ​ - ​ ​ 306 ​ ​ - Interest on lease liabilities ​ ​ 31 ​ ​ - ​ ​ 41 ​ ​ - Total Lease Cost ​ $ 2,797 ​ $ 2,928 ​ $ 8,730 ​ $ 8,940 ​ The maturities of lessor and lessee arrangements outstanding at September 30, 2020 are presented in the tables below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ Lessor ​ Lessee ​ ​ ​ Sales-type and Direct Financing ​ Operating ​ Finance For the remaining three months of 2020 $ 7,416 ​ $ 3,193 ​ $ — 2021 ​ 28,883 ​ ​ 12,500 ​ ​ 1,261 2022 ​ 29,799 ​ ​ 11,289 ​ ​ 1,292 2023 ​ 28,136 ​ ​ 10,324 ​ ​ 1,325 2024 ​ 26,185 ​ ​ 9,007 ​ ​ 1,358 2025 ​ ​ 17,780 ​ ​ 6,712 ​ ​ 1,392 Thereafter ​ 13,594 ​ ​ 17,701 ​ ​ 4,515 Total undiscounted cash flows ​ 151,793 ​ ​ 70,726 ​ ​ 11,143 Less: Adjustments (1) ​ 9,645 ​ ​ 5,969 ​ ​ 553 Total (2) ​ $ 142,148 ​ $ 64,757 ​ $ 10,590 (1) Lessor – unearned income and unearned guaranteed residual value; Lessee – imputed interest. (2) Represents lease receivables for lessor arrangements and lease liabilities for lessee arrangements ​

BORROWINGS

BORROWINGS	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
BORROWINGS	7. BORROWINGS Short-term Borrowings The Company classifies all borrowings that will mature within a year from the date on which the Company enters into them as short-term borrowings. Total short-term borrowings consist primarily of advances from the FHLB, federal funds purchased (which are secured overnight borrowings from other financial institutions), and other lines of credit. Also included in total short-term borrowings are securities sold under agreements to repurchase, which are secured transactions with customers and generally mature the day following the date sold. Total short-term borrowings consist of the following as of September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ ​ 2020 ​ 2019 Securities sold under agreements to repurchase ​ $ 91,086 ​ $ 66,053 ​ Federal Funds Purchased ​ ​ 25,000 ​ ​ — ​ FHLB Advances ​ 150,200 ​ 370,200 ​ Total short-term borrowings ​ $ 266,286 ​ $ 436,253 ​ ​ ​ ​ ​ ​ ​ ​ ​ Average outstanding balance during the period ​ $ 223,068 ​ $ 673,116 ​ Average interest rate (during the period) ​ 0.96 % 2.30 % Average interest rate at end of period ​ 0.25 % 1.52 % ​ The Bank maintains federal funds lines with several correspondent banks, the remaining available balance was $942.0 million and $682.0 million at September 30, 2020 and December 31, 2019, respectively. The Company maintains an alternate line of credit at a correspondent bank, which had an available balance of $25.0 million at both September 30, 2020 and December 31, 2019. The Company has certain restrictive covenants related to certain asset quality, capital, and profitability metrics associated with these lines and is considered to be in compliance with such covenants as of September 30, 2020. Additionally, the Company had a collateral dependent line of credit with the FHLB of up to $5.9 billion and $5.2 billion at September 30, 2020 and December 31, 2019, respectively. Long-term Borrowings In connection with several previous bank acquisitions, the Company issued and acquired trust preferred capital notes of $58.5 million and $87.0 million, respectively. Most recently, in connection with the acquisition of Access on February 1, 2019, the Company acquired additional trust preferred capital notes totaling $5.0 million. The remaining fair value discount on all acquired trust preferred capital notes was $14.3 million at September 30, 2020. On August 23, 2012, the Company modified its fixed rate FHLB advances to floating rate advances, which resulted in reducing the Company’s FHLB borrowing costs. In connection with this modification, the Company incurred a prepayment penalty of $19.6 million on the original advances which was deferred and to be amortized over the term of the modified advances using the effective rate method. On August 29, 2019, the Company repaid the floating rate FHLB advances. In connection with this repayment, the remaining unamortized prepayment penalty of $7.4 million was immediately recognized as a component of noninterest expense during the third quarter of 2019. During the second quarter of 2020, in connection with the loans originated as part of the PPP, the Company borrowed under the Federal Reserve’s PPPLF. Under the terms of the PPPLF, the Company can borrow funds which are secured by the Company’s PPP loans, and the interest rate on these borrowings is fixed. Total long-term borrowings consist of the following as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ ​ ​ ​ Principal ​ 3-Month LIBOR ​ Rate (1) ​ Maturity ​ Investment (2) Trust Preferred Capital Securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust Preferred Capital Note - Statutory Trust I ​ $ 22,500 2.75 % 2.98 % 6/17/2034 ​ $ 696 Trust Preferred Capital Note - Statutory Trust II ​ 36,000 1.40 % 1.63 % 6/15/2036 ​ 1,114 VFG Limited Liability Trust I Indenture ​ 20,000 2.73 % 2.96 % 3/18/2034 ​ 619 FNB Statutory Trust II Indenture ​ 12,000 3.10 % 3.33 % 6/26/2033 ​ 372 Gateway Capital Statutory Trust I ​ 8,000 3.10 % 3.33 % 9/17/2033 ​ 248 Gateway Capital Statutory Trust II ​ 7,000 2.65 % 2.88 % 6/17/2034 ​ 217 Gateway Capital Statutory Trust III ​ 15,000 1.50 % 1.73 % 5/30/2036 ​ 464 Gateway Capital Statutory Trust IV ​ 25,000 1.55 % 1.78 % 7/30/2037 ​ 774 MFC Capital Trust II ​ 5,000 2.85 % 3.08 % 1/23/2034 ​ 155 Total Trust Preferred Capital Securities ​ $ 150,500 ​ $ 4,659 FHLB Advances (3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Convertible Flipper ​ $ 50,000 ​ - % 0.85 % 8/17/2029 ​ ​ ​ Convertible Flipper ​ ​ 150,000 ​ (0.75) % - % 5/22/2029 ​ ​ ​ Convertible Flipper ​ ​ 50,000 ​ (0.75) % - % 5/30/2029 ​ ​ ​ Convertible Flipper ​ ​ 100,000 ​ (0.75) % - % 6/21/2029 ​ ​ ​ Fixed Rate Convertible ​ ​ 200,000 ​ - % 1.78 % 10/26/2028 ​ ​ ​ Fixed Rate Credit ​ ​ 10,000 ​ - % 1.54 % 10/2/2020 ​ ​ ​ Total FHLB Advances ​ $ 560,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ Subordinated Debt (4)(5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2025 Subordinated Debt ​ $ 8,500 ​ - % 6.75 % 6/30/2025 ​ ​ ​ 2026 Subordinated Debt (6) ​ ​ 150,000 ​ - % 5.00 % 12/15/2026 ​ ​ ​ Total Subordinated Debt ​ $ 158,500 ​ ​ ​ ​ ​ ​ ​ ​ ​ PPPLF Advances (7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PPPLF Advance 4/8/2022 ​ $ 55,422 ​ - % 0.35 % 4/8/2022 ​ ​ ​ PPPLF Advance 4/11/2022 ​ ​ 134,523 ​ - % 0.35 % 4/11/2022 ​ ​ ​ Total PPPLF Advances ​ $ 189,945 ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Premium (Discount) (8) ​ ​ (15,568) ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment in Trust Preferred Capital Securities ​ ​ 4,659 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Long-term Borrowings ​ $ 1,048,036 ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Rate as of September 30, 2020. Calculated using non-rounded numbers. (2) The total of the trust preferred capital securities and investments in the respective trusts represents the principal asset of the Company’s junior subordinated debt securities with like maturities and like interest rates to the capital securities. The Company’s investment in the trusts is reported in "Other Assets" on the Company’s Consolidated Balance Sheets. (3) Convertible Flippers have interest rate floors of 0% . (4) The remaining issuance discount as of September 30, 2020 is $1.2 million. (5) Subordinated notes qualify as Tier 2 capital for the Company for regulatory purposes. (6) Fixed-to-floating rate notes. On December 15, 2021, the interest rate will change to a floating rate of LIBOR plus 3.175% through its maturity date. (7) The Company’s available borrowing capacity under the PPPLF as of September 30, 2020 was $1.4 billion. (8) Includes discount on issued subordinated notes. ​ ​ ​ ​ Total long-term borrowings consist of the following as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ ​ ​ ​ Principal ​ 3-Month LIBOR ​ Rate (1) ​ Maturity ​ Investment (2) Trust Preferred Capital Securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust Preferred Capital Note - Statutory Trust I ​ $ 22,500 2.75 % 4.66 % 6/17/2034 ​ $ 696 Trust Preferred Capital Note - Statutory Trust II ​ 36,000 1.40 % 3.31 % 6/15/2036 ​ 1,114 VFG Limited Liability Trust I Indenture ​ 20,000 2.73 % 4.64 % 3/18/2034 ​ 619 FNB Statutory Trust II Indenture ​ 12,000 3.10 % 5.01 % 6/26/2033 ​ 372 Gateway Capital Statutory Trust I ​ 8,000 3.10 % 5.01 % 9/17/2033 ​ 248 Gateway Capital Statutory Trust II ​ 7,000 2.65 % 4.56 % 6/17/2034 ​ 217 Gateway Capital Statutory Trust III ​ 15,000 1.50 % 3.41 % 5/30/2036 ​ 464 Gateway Capital Statutory Trust IV ​ 25,000 1.55 % 3.46 % 7/30/2037 ​ 774 MFC Capital Trust II ​ 5,000 2.85 % 4.76 % 1/23/2034 ​ 155 Total Trust Preferred Capital Securities ​ $ 150,500 ​ $ 4,659 FHLB Advances (3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Convertible Flipper ​ $ 50,000 ​ (0.75) % 1.16 % 8/17/2029 ​ ​ ​ Convertible Flipper ​ ​ 200,000 ​ (0.50) % 1.41 % 5/15/2024 ​ ​ ​ Convertible Flipper ​ ​ 150,000 ​ (0.75) % 1.16 % 5/22/2029 ​ ​ ​ Convertible Flipper ​ ​ 50,000 ​ (0.75) ​ 1.16 ​ 5/30/2029 ​ ​ ​ Convertible Flipper ​ ​ 100,000 ​ (0.75) % 1.16 % 6/21/2029 ​ ​ ​ Fixed Rate Convertible ​ ​ 200,000 ​ - % 1.78 % 10/26/2028 ​ ​ ​ Fixed Rate Hybrid ​ ​ 20,000 ​ - % 1.58 % 5/18/2020 ​ ​ ​ Fixed Rate Credit ​ ​ 10,000 ​ - % 1.54 % 10/2/2020 ​ ​ ​ Total FHLB Advances ​ $ 780,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ Subordinated Debt (4)(5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2025 Subordinated Debt ​ $ 8,500 ​ - % 6.75 % 6/30/2025 ​ ​ ​ 2026 Subordinated Debt (6) ​ ​ 150,000 ​ - % 5.00 % 12/15/2026 ​ ​ ​ Total Subordinated Debt ​ $ 158,500 ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Premium (Discount) (7) ​ ​ (16,164) ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment in Trust Preferred Capital Securities ​ ​ 4,659 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Long-term Borrowings ​ $ 1,077,495 ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Rate as of December 31, 2019. Calculated using non-rounded numbers. (2) The total of the trust preferred capital securities and investments in the respective trusts represents the principal asset of the Company’s junior subordinated debt securities with like maturities and like interest rates to the capital securities. The Company’s investment in the trusts is reported in "Other Assets" on the Company’s Consolidated Balance Sheets. (3) Convertible Flippers have interest rate floors of 0% . (4) The remaining issuance discount as of December 31, 2019 is $1.4 million. (5) Subordinated notes qualify as Tier 2 capital for the Company for regulatory purposes. (6) Fixed-to-floating rate notes. On December 15, 2021, the interest rate will change to a floating rate of LIBOR plus 3.175% through its maturity date. (7) Includes discount on issued subordinated notes. ​ ​ As of September 30, 2020, the contractual maturities of long-term debt are as follows for the years ending (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust ​ ​ ​ ​ ​ ​ Preferred ​ ​ ​ Fair Value Total ​ Capital Subordinated PPPLF FHLB Premium Long-term ​ Notes Debt Advances Advances (Discount) (1) Borrowings For the remaining three months of 2020 ​ $ — ​ $ — ​ $ — ​ $ 10,000 ​ $ (238) ​ $ 9,762 2021 ​ — ​ — ​ ​ — ​ — ​ (1,008) ​ (1,008) 2022 ​ — ​ — ​ ​ 189,945 ​ — ​ (1,030) ​ 188,915 2023 ​ — ​ — ​ ​ — ​ — ​ (1,053) ​ (1,053) 2024 ​ — ​ — ​ ​ — ​ — ​ (1,078) ​ (1,078) Thereafter ​ 155,159 ​ 158,500 ​ ​ — ​ 550,000 ​ (11,161) ​ 852,498 Total long-term borrowings ​ $ 155,159 ​ $ 158,500 ​ $ 189,945 ​ $ 560,000 ​ $ (15,568) ​ $ 1,048,036 ​ (1) Includes discount on issued subordinated notes. ​ ​

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	8. COMMITMENTS AND CONTINGENCIES Litigation Matters In the ordinary course of its operations, the Company and its subsidiaries are parties to various legal proceedings. Based on the information presently available, and after consultation with legal counsel, management believes that the ultimate outcome in such proceedings, in the aggregate, will not have a material adverse effect on the business, financial condition, or results of operations of the Company. Financial Instruments with Off-Balance Sheet Risk The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit and letters of credit. These instruments involve elements of credit and interest rate risk in excess of the amount recognized on the Company’s Consolidated Balance Sheets. The contractual amounts of these instruments reflect the extent of the Company’s involvement in particular classes of financial instruments. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instruments for commitments to extend credit and letters of credit written is represented by the contractual amount of these instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Unless noted otherwise, the Company does not require collateral or other security to support off-balance sheet financial instruments with credit risk. The Company considers credit losses related to off-balance sheet commitments by undergoing a similar process in evaluating losses for loans that are carried on the balance sheet. The Company considers historical loss and funding information, current and future economic conditions, risk ratings, and past due status among other factors in the consideration of expected credit losses in the Company’s off-balance sheet commitments to extend credit. The Company also records an indemnification reserve that includes balances relating to mortgage loans previously sold based on historical statistics and loss rates. As of September 30, 2020 and December 31, 2019, the Company’s reserves for off-balance sheet credit risk and indemnification were $14.0 million and $2.6 million, respectively. Commitments to extend credit are agreements to lend to customers as long as there are no violations of any conditions established in the contracts. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Because many of the commitments may expire without being completely drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Letters of credit are conditional commitments issued by the Company to guarantee the performance of customers to third parties. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. The following table presents the balances of commitments and contingencies (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 December 31, 2019 Commitments with off-balance sheet risk: ​ ​ Commitments to extend credit (1) ​ $ 4,631,361 ​ $ 4,691,272 Letters of credit ​ 164,303 ​ 209,658 Total commitments with off-balance sheet risk ​ $ 4,795,664 ​ $ 4,900,930 (1) Includes unfunded overdraft protection. ​ ​ ​ ​ ​ ​ ​ Prior to the first quarter of 2020, the Company was required to maintain a reserve against its deposits in accordance with Regulation D of the Federal Reserve Act. On March 15, 2020, the Federal Reserve Board announced that reserve requirement ratios would be reduced to zero percent effective March 26, 2020. This action eliminated reserve requirements for all depository institutions. As of September 30, 2020, the Company had approximately $ 296.2 million in deposits in other financial institutions, of which $276.8 million served as collateral for cash flow and loan swap derivatives. The Company had approximately $ 16.3 million in deposits in other financial institutions that were uninsured at September 30, 2020. At least annually, the Company’s management evaluates the loss risk of its uninsured deposits in financial counterparties. For asset/liability management purposes, the Company uses interest rate swap agreements to hedge various exposures or to modify the interest rate characteristics of various balance sheet accounts. Refer to Note 9 “Derivatives” for additional information. As part of the Company’s liquidity management strategy, it pledges collateral to secure various financing and other activities that occur during the normal course of business. The following tables present the types of collateral pledged, at September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pledged Assets as of September 30, 2020 ​ ​ ​ ​ ​ ​ AFS HTM ​ ​ ​ ​ ​ ​ Cash ​ Securities (1) ​ Securities (1) ​ Loans (2) ​ Total Public deposits ​ $ — ​ $ 476,167 ​ $ 432,791 ​ $ — ​ $ 908,958 Repurchase agreements ​ — ​ 111,781 ​ — ​ — ​ 111,781 FHLB advances ​ — ​ 54,195 ​ — ​ 4,354,063 ​ 4,408,258 Derivatives ​ 276,786 ​ 939 ​ — ​ — ​ 277,725 Fed Funds ​ ​ — ​ ​ — ​ ​ — ​ ​ 316,561 ​ ​ 316,561 PPP Loans ​ ​ — ​ ​ — ​ ​ — ​ ​ 189,945 ​ ​ 189,945 Other purposes ​ — ​ ​ 124,517 ​ ​ 8,862 ​ ​ — ​ ​ 133,379 Total pledged assets ​ $ 276,786 ​ $ 767,599 ​ $ 441,653 ​ $ 4,860,569 ​ $ 6,346,607 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Balance represents market value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (2) Balance represents book value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pledged Assets as of December 31, 2019 ​ ​ ​ ​ ​ ​ AFS HTM ​ ​ ​ ​ ​ ​ Cash ​ Securities (1) ​ Securities (1) ​ Loans (2) ​ Total Public deposits ​ $ — ​ $ 467,266 ​ $ 292,096 ​ $ — ​ $ 759,362 Repurchase agreements ​ — ​ 79,299 ​ 7,602 ​ — ​ 86,901 FHLB advances ​ — ​ 63,812 ​ — ​ 3,846,934 ​ 3,910,746 Derivatives ​ 116,839 ​ 1,260 ​ — ​ — ​ 118,099 Fed Funds ​ ​ — ​ ​ — ​ ​ — ​ ​ 292,738 ​ ​ 292,738 Other purposes ​ — ​ 122,358 ​ 10,654 ​ — ​ 133,012 Total pledged assets ​ $ 116,839 ​ $ 733,995 ​ $ 310,352 ​ $ 4,139,672 ​ $ 5,300,858 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Balance represents book value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (2) Balance represents market value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

DERIVATIVES

DERIVATIVES	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	9. DERIVATIVES The Company is exposed to economic risks arising from its business operations and uses derivatives primarily to manage risk associated with changing interest rates, and to assist customers with their risk management objectives. The Company designates certain derivatives as hedging instruments in a qualifying hedge accounting relationship (cash flow or fair value hedge). The remaining are classified as free-standing derivatives consisting of customer accommodation loan swaps and interest rate lock commitments that do not qualify for hedge accounting. Derivatives Counterparty Credit Risk Derivative instruments contain an element of credit risk that arises from the potential failure of a counterparty to perform according to the terms of the contract. The Company’s exposure to derivative counterparty credit risk, at any point in time, is equal to the amount reported as a derivative asset on the Company’s Consolidated Balance Sheets, assuming no recoveries of underlying collateral. Effective January 1, 2019, as required under the Dodd-Frank Act, the Company clears eligible derivative transactions through CCPs such as the CME and LCH, which are often referred to as “central clearinghouses”. The Company clears certain OTC derivatives with central clearinghouses through FCMs as part of the regulatory requirement. The use of the CCPs and the FCMs reduces the Company’s bilateral counterparty credit exposures while it increases the Company’s credit exposures to CCPs and FCMs. The Company is required by CCPs to post initial and variation margin to mitigate the risk of non-payment through the Company’s FCMs. The Company’s FCM agreements governing these derivative transactions generally include provisions that may require the Company to post more collateral or otherwise change terms in the Company’s agreements under certain circumstances. For CME and LCH-cleared OTC derivatives, the Company characterizes variation margin cash payments as settlements. The Company also enters into legally enforceable master netting agreements and collateral agreements, where possible, with certain derivative counterparties to mitigate the risk of default on a bilateral basis. These bilateral agreements typically provide the right to offset exposures and require one counterparty to post collateral on derivative instruments in a net liability position to the other counterparty. Cash Flow Hedges The Company designates derivatives as cash flow hedges when they are used to manage exposure to variability in cash flows related to forecasted transactions on variable rate financial instruments. The Company uses interest rate swap agreements as part of its hedging strategy by exchanging a notional amount, equal to the principal amount of the borrowings or commercial loans, for fixed-rate interest based on benchmarked interest rates. The original terms and conditions of the interest rate swaps vary and range in length. Amounts receivable or payable are recognized as accrued under the terms of the agreements. All swaps were entered into with counterparties that met the Company’s credit standards, and the agreements contain collateral provisions protecting the at-risk party. The Company concluded that the credit risk inherent in the contract is not significant. The Company assesses the effectiveness of each hedging relationship on a periodic basis using statistical regression analysis. The Company also measures the ineffectiveness of each hedging relationship using the change in variable cash flows method which compares the cumulative changes in cash flows of the hedging instrument relative to cumulative changes in the hedged item’s cash flows. In accordance with ASC 815, Derivatives and Hedging , the effective portions of the derivatives’ unrealized gains or losses are recorded as a component of other comprehensive income. For the period ended December 31, 2019, the Company’s cash flow hedges were highly effective. The Company did no t have any derivatives designated as cash flow hedges outstanding at September 30, 2020. Fair Value Hedge Derivatives are designated as fair value hedges when they are used to manage exposure to changes in the fair value of certain financial assets and liabilities, referred to as the hedged items, which fluctuate in value as a result of movements in interest rates. Loans: During the normal course of business, the Company enters into swap agreements to convert certain long-term fixed-rate loans to floating rates to hedge the Company’s exposure to interest rate risk. The Company pays a fixed interest rate to the counterparty and receives a floating rate from the same counterparty calculated on the aggregate notional amount. At September 30, 2020 and December 31, 2019, the aggregate notional amount of the related hedged items for certain long-term fixed rate loans totaled $75.9 million and $83.1 million, respectively, and the fair value of the swaps associated with the derivative related to hedged items was an unrealized loss of $5.9 million and $2.0 million, respectively. AFS Securities: The Company has entered into a swap agreement to hedge the interest rate risk on a portion of its fixed rate available for sale securities. At September 30, 2020 and December 31, 2019, the aggregate notional amount of the related hedged items of the AFS securities totaled $50 million and the fair value of the swaps associated with the derivative related to hedged items was an unrealized loss of $8.0 million and $4.1 million, respectively. The Company applies hedge accounting in accordance with ASC 815, Derivatives and Hedging , and the fair value hedge and the underlying hedged item, attributable to the risk being hedged, are recorded at fair value with unrealized gains and losses being recorded on the Company’s Consolidated Statements of Income. Statistical regression analysis is used to assess hedge effectiveness, both at inception of the hedging relationship and on an ongoing basis. The regression analysis involves regressing the periodic change in fair value of the hedging instrument against the periodic changes in fair value of the asset being hedged due to changes in the hedged risk. The Company’s fair value hedges continue to be highly effective and had no material impact on the Consolidated Statements of Income, but if any ineffectiveness exists, portions of the unrealized gains or losses would be recorded in interest income or interest expense on the Company’s Consolidated Statements of Income. Loan Swaps During the normal course of business, the Company offers interest rate swap loan relationships (“loan swaps”) to its borrowers to help meet their financing needs. Upon entering into the loan swaps, the Company enters into offsetting positions with a third party in order to minimize interest rate risk. These back-to-back loan swaps qualify as financial derivatives with fair values as reported in “Other Assets” and “Other Liabilities” on the Company’s Consolidated Balance Sheets. The following table summarizes key elements of the Company’s derivative instruments as of September 30, 2020 and December 31, 2019, segregated by derivatives that are considered accounting hedges and those that are not (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 December 31, 2019 ​ ​ ​ ​ ​ Derivative (2) ​ ​ ​ ​ Derivative (2) ​ Notional or ​ ​ ​ ​ Notional or ​ ​ ​ ​ ​ ​ Contractual ​ ​ ​ ​ ​ ​ ​ Contractual ​ ​ ​ ​ ​ ​ ​ ​ Amount (1) ​ Assets ​ Liabilities ​ Amount (1) ​ Assets ​ Liabilities Derivatives designated as accounting hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate contracts: ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flow hedges ​ $ — ​ $ — ​ $ — ​ $ 100,000 ​ $ — ​ $ 1,147 Fair value hedges ​ 125,856 ​ — ​ 13,912 ​ 133,078 ​ 182 ​ 6,256 Derivatives not designated as accounting hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loan Swaps : ​ ​ ​ ​ ​ ​ Pay fixed - receive floating interest rate swaps ​ 2,192,085 ​ — ​ 187,299 ​ 1,575,149 ​ 753 ​ 53,592 Pay floating - receive fixed interest rate swaps ​ 2,192,085 ​ 187,299 ​ — ​ 1,575,149 ​ 53,592 ​ 753 ​ (1) Notional amounts are not recorded on the Company’s Consolidated Balance Sheets and are generally used only as a basis on which interest and other payments are determined. (2) Balances represent fair value of derivative financial instruments. ​ The following table summarizes the carrying value of the Company’s hedged assets in fair value hedges and the associated cumulative basis adjustments included in those carrying values as of September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ December 31, 2019 ​ ​ ​ Cumulative ​ Cumulative ​ ​ ​ ​ ​ Amount of Basis ​ ​ ​ Amount of Basis ​ ​ ​ ​ ​ Adjustments ​ ​ ​ Adjustments ​ ​ ​ ​ ​ Included in the ​ ​ ​ Included in the ​ ​ Carrying Amount ​ Carrying ​ Carrying Amount ​ Carrying ​ ​ of Hedged ​ Amount of the ​ of Hedged ​ Amount of the ​ ​ Assets/(Liabilities) ​ Hedged ​ Assets/(Liabilities) ​ Hedged ​ ​ Amount (1) Assets/(Liabilities) ​ Amount (1) Assets/(Liabilities) Line items on the Consolidated Balance Sheets in which the hedged item is included: ​ ​ ​ ​ Securities available-for-sale (1) (2) ​ $ 179,908 ​ $ 7,992 ​ $ 206,799 ​ $ 4,072 Loans ​ 75,856 ​ 5,830 ​ 83,078 ​ 1,972 ​ (1) These amounts include the amortized cost basis of the investment securities designated in hedging relationships for which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At September 30, 2020 and December 31, 2019, the amortized cost basis of this portfolio was $ 180 million and $ 207 million, respectively and the cumulative basis adjustment associated with this hedge was $8.0 million and $4.1 million, respectively. The amount of the designated hedged item was $50 million. (2) Carrying value represents amortized cost. ​

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
STOCKHOLDERS' EQUITY	10. STOCKHOLDERS’ EQUITY Series A Preferred Stock On June 9, 2020, the Company issued and sold 6,900,000 depositary shares, each representing a 1/400th ownership interest in a share of its 6.875% Perpetual Non-Cumulative Preferred Stock, Series A, par value $10.00 per share (the “Series A preferred stock”), with a liquidation preference of $10,000 per share of Series A preferred stock (equivalent to $25 per depositary share), including 900,000 depositary shares pursuant to the exercise in full by the underwriters of their option to purchase additional depositary shares. The total net proceeds to the Company were approximately $166.4 million, after deducting the underwriting discount and other offering expenses payable by the Company. The Company intends to use the net proceeds of the offering for general corporate purposes in the ordinary course of its business. General corporate purposes may include repayment of debt, loan funding, acquisitions, additions to working capital, capital expenditures and investments in the Company’s subsidiaries. ​ Accumulated Other Comprehensive Income (Loss) The change in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2020 is summarized as follows, net of tax (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gains ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) on ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ BOLI ​ Total Balance - June 30, 2020 ​ $ 63,886 ​ $ 65 ​ $ — ​ $ (2,647) ​ $ 61,304 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 1,250 ​ ​ — ​ ​ — ​ ​ — ​ 1,250 Amounts reclassified from AOCI into earnings ​ (14) ​ ​ (5) ​ ​ — ​ ​ 127 ​ 108 Net current period other comprehensive income (loss) ​ 1,236 ​ (5) ​ — ​ 127 ​ 1,358 Balance - September 30, 2020 ​ $ 65,122 ​ $ 60 ​ $ — ​ $ (2,520) ​ $ 62,662 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gains ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) on ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ BOLI ​ Total Balance - December 31, 2019 ​ $ 37,877 ​ $ 75 ​ $ (782) ​ $ (1,595) ​ $ 35,575 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 36,956 ​ ​ — ​ ​ (699) ​ ​ (1,289) ​ 34,968 Amounts reclassified from AOCI into earnings ​ (9,711) ​ ​ (15) ​ ​ 1,481 ​ ​ 364 ​ (7,881) Net current period other comprehensive income (loss) ​ 27,245 ​ (15) ​ 782 ​ (925) ​ 27,087 Balance - September 30, 2020 ​ $ 65,122 ​ $ 60 ​ $ — ​ $ (2,520) ​ $ 62,662 ​ ​ The change in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 is summarized as follows, net of tax (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gain ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ on BOLI ​ Total Balance - June 30, 2019 ​ $ 36,125 ​ $ 85 ​ $ (7,155) ​ $ (988) ​ $ 28,067 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 12,364 ​ ​ — ​ ​ 6,025 ​ ​ (647) ​ ​ 17,742 Amounts reclassified from AOCI into earnings ​ (5,612) ​ ​ (5) ​ ​ 158 ​ ​ 19 ​ ​ (5,440) Net current period other comprehensive income (loss) ​ 6,752 ​ (5) ​ 6,183 ​ (628) ​ 12,302 Balance - September 30, 2019 ​ $ 42,877 ​ $ 80 ​ $ (972) ​ $ (1,616) ​ $ 40,369 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gain ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ on BOLI ​ Total Balance - December 31, 2018 ​ $ (5,949) ​ $ 95 ​ $ (3,393) ​ $ (1,026) ​ $ (10,273) Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 54,598 ​ ​ — ​ ​ 1,970 ​ ​ (647) ​ ​ 55,921 Amounts reclassified from AOCI into earnings ​ (5,772) ​ ​ (15) ​ ​ 451 ​ ​ 57 ​ ​ (5,279) Net current period other comprehensive income (loss) ​ 48,826 ​ (15) ​ 2,421 ​ (590) ​ 50,642 Balance - September 30, 2019 ​ $ 42,877 ​ $ 80 ​ $ (972) ​ $ (1,616) ​ $ 40,369 ​

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	11. FAIR VALUE MEASUREMENTS The Company follows ASC 820, Fair Value Measurements and Disclosures , to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. ASC 820 clarifies that fair value of certain assets and liabilities is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between willing market participants. ASC 820 specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. The three levels of the fair value hierarchy under ASC 820 based on these two types of inputs are as follows: Level 1 Valuation is based on quoted prices in active markets for identical assets and liabilities. Level 2 Valuation is based on observable inputs including quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets and liabilities in less active markets, and model-based valuation techniques for which significant assumptions can be derived primarily from or corroborated by observable data in the markets. Level 3 Valuation is based on model-based techniques that use one or more significant inputs or assumptions that are unobservable in the market. These unobservable inputs reflect the Company’s assumptions about what market participants would use and information that is reasonably available under the circumstances without undue cost and effort. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following describes the valuation techniques used by the Company to measure certain financial assets and liabilities recorded at fair value on a recurring basis in the financial statements. Derivative instruments As discussed in Note 9 “Derivatives”, the Company records derivative instruments at fair value on a recurring basis. The Company utilizes derivative instruments as part of the management of interest rate risk to modify the re-pricing characteristics of certain portions of the Company’s interest-bearing assets and liabilities. The Company has contracted with a third party vendor to provide valuations for derivatives using standard valuation techniques and therefore classifies such valuations as Level 2. Third party valuations are validated by the Company using Bloomberg Valuation Service’s derivative pricing functions. No material differences were identified during the validation as of September 30, 2020 and December 31, 2019. The Company has considered counterparty credit risk in the valuation of its derivative assets and has considered its own credit risk in the valuation of its derivative liabilities. Mortgage banking derivatives as of September 30, 2020 did not have a material impact on the Company’s Consolidated Financial Statements. AFS Securities AFS securities are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, when available (Level 1). If quoted market prices are not available, fair values are measured utilizing independent valuation techniques of identical or similar securities for which significant assumptions are derived primarily from or corroborated by observable market data (Level 2). If the inputs used to provide the evaluation for certain securities are unobservable and/or there is little, if any, market activity, then the security would fall to the lowest level of the hierarchy (Level 3). The Company’s investment portfolio is primarily valued using fair value measurements that are considered to be Level 2. The Company has contracted with a third party portfolio accounting service vendor for valuation of its securities portfolio. The vendor’s primary source for security valuation is ICE Data Services, which evaluates securities based on market data. ICE Data Services utilizes evaluated pricing models that vary by asset class and include available trade, bid, and other market information. Generally, the methodology includes broker quotes, proprietary models, vast descriptive terms and conditions databases, as well as extensive quality control programs. The vendor utilizes proprietary valuation matrices for valuing all municipals securities. The initial curves for determining the price, movement, and yield relationships within the municipal matrices are derived from industry benchmark curves or sourced from a municipal trading desk. The securities are further broken down according to issuer, credit support, state of issuance, and rating to incorporate additional spreads to the industry benchmark curves. The Company primarily uses Bloomberg Valuation Service, an independent information source that draws on quantitative models and market data contributed from over 4,000 market participants, to validate third party valuations. Any material differences between valuation sources are researched by further analyzing the various inputs that are utilized by each pricing source. No material differences were identified during the validation as of September 30, 2020 and December 31, 2019. The carrying value of restricted Federal Reserve Bank and FHLB stock approximates fair value based on the redemption provisions of each entity and is therefore excluded from the table below. Loans Held for Sale Loans held for sale are carried at fair value. These loans currently consist of residential loans originated for sale in the secondary market. Fair value is based on the price secondary markets are currently offering for similar loans using observable market data which is not materially different than cost due to the short duration between origination and sale (Level 2). Gains and losses on the sale of loans are recorded in current period earnings as a component of "Mortgage banking income" on the Company’s Consolidated Statements of Income. The following table presents the balances of financial assets and liabilities measured at fair value on a recurring basis at September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at September 30, 2020 using ​ ​ ​ Significant ​ ​ ​ ​ ​ ​ Quoted Prices in ​ Other ​ Significant ​ ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ ​ ​ ​ ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ AFS securities: ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ — ​ $ 13,878 ​ $ — ​ $ 13,878 Obligations of states and political subdivisions ​ — ​ 796,856 ​ — ​ 796,856 Corporate and other bonds (1) ​ — ​ 148,918 ​ — ​ 148,918 Mortgage-backed securities ​ — ​ 1,482,067 ​ — ​ 1,482,067 Other securities ​ — ​ 1,621 ​ — ​ 1,621 Loans held for sale ​ — ​ 52,607 ​ — ​ 52,607 Derivatives: ​ ​ ​ ​ Interest rate swap ​ — ​ 187,299 ​ — ​ 187,299 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ Derivatives: ​ ​ ​ ​ Interest rate swap ​ $ — ​ $ 187,299 ​ $ — ​ $ 187,299 Fair value hedges ​ — ​ 13,912 ​ — ​ 13,912 (1) Other bonds include asset-backed securities. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2019 using ​ ​ ​ Significant ​ ​ ​ ​ ​ ​ Quoted Prices in ​ Other ​ Significant ​ ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ ​ ​ ​ ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ AFS securities: ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ — ​ $ 21,320 ​ $ — ​ $ 21,320 Obligations of states and political subdivisions ​ ​ — ​ ​ 447,091 ​ ​ — ​ ​ 447,091 Corporate and other bonds (1) ​ — ​ 135,959 ​ — ​ 135,959 Mortgage-backed securities ​ — ​ 1,337,996 ​ — ​ 1,337,996 Other securities ​ — ​ 3,079 ​ — ​ 3,079 Loans held for sale ​ ​ — ​ ​ 55,405 ​ ​ — ​ ​ 55,405 Derivatives: ​ ​ ​ ​ Interest rate swap ​ — ​ 54,345 ​ — ​ 54,345 Fair value hedges ​ — ​ 182 ​ — ​ 182 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ Derivatives: ​ ​ ​ ​ Interest rate swap ​ $ — ​ $ 54,345 ​ $ — ​ $ 54,345 Cash flow hedges ​ — ​ 1,147 ​ — ​ 1,147 Fair value hedges ​ — ​ 6,256 ​ — ​ 6,256 (1) Other bonds include asset-backed securities. ​ Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets are measured at fair value on a nonrecurring basis in accordance with U.S. GAAP. Adjustments to the fair value of these assets usually result from the application of lower-of-cost-or-market accounting or write-downs of individual assets after they are evaluated for impairment. The primary assets accounted for at fair value on a nonrecurring basis are related to foreclosed properties, former bank premises, and collateral-dependent loans that are individually assessed. When the asset is secured by real estate, the Company measures the fair value utilizing an income or market valuation approach based on an appraisal conducted by an independent, licensed appraiser using observable market data. Management may discount the value from the appraisal in determining the fair value if, based on its understanding of the market conditions, the collateral had been impaired below the appraised value (Level 3). The assets for which a nonrecurring fair value measurement was recorded during the period ended September 30, 2020 and December 31, 2019 was $14.0 million and $11.9 million, respectively. The nonrecurring valuation adjustments for these assets did not have a material impact on the Company’s consolidated financial statements. Fair Value of Financial Instruments ASC 825, Financial Instruments, requires disclosure about fair value of financial instruments for interim periods and excludes certain financial instruments and all non-financial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company. Cash and Cash Equivalents For those short-term instruments, the carrying amount is a reasonable estimate of fair value. HTM Securities The Company’s investment portfolio is primarily valued using fair value measurements that are considered to be Level 2. The Company has contracted with a third party portfolio accounting service vendor for valuation of its securities portfolio. The vendor’s primary source for security valuation is ICE Data Services, which evaluates securities based on market data. ICE Data Services utilizes evaluated pricing models that vary by asset class and include available trade, bid, and other market information. Generally, the methodology includes broker quotes, proprietary models, vast descriptive terms and conditions databases, as well as extensive quality control programs. The vendor utilizes proprietary valuation matrices for valuing all municipals securities. The initial curves for determining the price, movement, and yield relationships within the municipal matrices are derived from industry benchmark curves or sourced from a municipal trading desk. The securities are further broken down according to issuer, credit support, state of issuance, and rating to incorporate additional spreads to the industry benchmark curves. The Company primarily uses Bloomberg Valuation Service, an independent information source that draws on quantitative models and market data contributed from over 4,000 market participants, to validate third party valuations. Any material differences between valuation sources are researched by further analyzing the various inputs that are utilized by each pricing source. No material differences were identified during the validation as of September 30, 2020 and December 31, 2019. The Company’s level 3 securities are a result of the Access acquisition and are comprised of asset-backed securities and municipal bonds. Valuations of the asset-backed securities are provided by a third party vendor specializing in the SBA markets, and are based on underlying loan pool information, market data, and recent trading activity for similar securities. Valuations of the municipal bonds are provided by a third party vendor that specializes in hard-to-value securities, and are based on a discounted cash flow model and considerations for the complexity of the instrument, likelihood it will be called and credit ratings. The Company reviews the valuation of both security types for reasonableness in the context of market conditions and to similar bonds in the Company’s portfolio. Any material differences between valuation sources are researched by further analyzing the various inputs that are utilized by each pricing source. No material differences were identified during the validation as of September 30, 2020 and December 31, 2019. Loans The fair value of loans was estimated using an exit price, representing the amount that would be expected to be received if the Company sold the loans. The fair value of performing loans was estimated through use of discounted cash flows. Credit loss assumptions were based on market PD/LGD for loan cohorts. The discount rate was based primarily on recent market origination rates. Fair value of loans individually assessed for impairment and their respective levels within the fair value hierarchy are described in the previous section related to fair value measurements of assets that are measured on a nonrecurring basis. ​ Bank owned life insurance The carrying value of BOLI approximates fair value. The Company records these policies at their cash surrender value, which is estimated using information provided by insurance carriers. Deposits The fair value of demand deposits, savings accounts, and certain money market deposits is the amount payable on demand at the reporting date. The fair value of certificates of deposits were valued using a discounted cash flow calculation that includes a market rate analysis of the current rates offered by market participants for certificates of deposits that mature in the same period. Accrued Interest The carrying amounts of accrued interest approximate fair value. ​ The carrying values and estimated fair values of the Company’s financial instruments at September 30, 2020 and December 31, 2019 are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at September 30, 2020 using ​ ​ ​ Quoted Prices Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Observable ​ Unobservable ​ Total Fair ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ Value ​ ​ Carrying ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Value ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 520,966 ​ $ 520,966 ​ $ — ​ $ — ​ $ 520,966 AFS securities ​ 2,443,340 ​ — ​ 2,443,340 ​ — ​ 2,443,340 HTM securities ​ 546,661 ​ — ​ 600,679 ​ 13,494 ​ 614,173 Restricted stock ​ 112,216 ​ — ​ 112,216 ​ — ​ 112,216 Loans held for sale ​ 52,607 ​ — ​ 52,607 ​ — ​ 52,607 Net loans ​ 14,209,093 ​ — ​ — ​ 14,102,010 ​ 14,102,010 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 187,299 ​ — ​ 187,299 ​ — ​ 187,299 Accrued interest receivable ​ 71,475 ​ — ​ 71,475 ​ — ​ 71,475 BOLI ​ 325,538 ​ — ​ 325,538 ​ — ​ 325,538 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ ​ Deposits ​ $ 15,576,098 ​ $ — ​ $ 15,624,786 ​ $ — ​ $ 15,624,786 Borrowings ​ 1,314,322 ​ — ​ 1,279,838 ​ — ​ 1,279,838 Accrued interest payable ​ 5,126 ​ — ​ 5,126 ​ — ​ 5,126 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 187,299 ​ — ​ 187,299 ​ — ​ 187,299 Fair value hedges ​ 13,912 ​ — ​ 13,912 ​ — ​ 13,912 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2019 using ​ ​ ​ ​ ​ Quoted Prices ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Observable ​ Unobservable ​ Total Fair ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ Value ​ ​ Carrying ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Value ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 436,032 ​ $ 436,032 ​ $ — ​ $ — ​ $ 436,032 AFS securities ​ 1,945,445 ​ — ​ 1,945,445 ​ — ​ 1,945,445 HTM securities ​ 555,144 ​ — ​ 585,820 ​ 17,683 ​ 603,503 Restricted stock ​ 130,848 ​ — ​ 130,848 ​ — ​ 130,848 Loans held for sale ​ ​ 55,405 ​ ​ — ​ 55,405 ​ — ​ ​ 55,405 Net loans ​ 12,568,642 ​ — ​ — ​ 12,449,505 ​ 12,449,505 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 54,345 ​ — ​ 54,345 ​ — ​ 54,345 Fair value hedges ​ 182 ​ — ​ 182 ​ — ​ 182 Accrued interest receivable ​ 52,721 ​ — ​ 52,721 ​ — ​ 52,721 BOLI ​ 322,917 ​ — ​ 322,917 ​ — ​ 322,917 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ ​ Deposits ​ $ 13,304,981 ​ $ — ​ $ 13,349,943 ​ $ — ​ $ 13,349,943 Borrowings ​ 1,513,748 ​ — ​ 1,479,606 ​ — ​ 1,479,606 Accrued interest payable ​ 6,108 ​ — ​ 6,108 ​ — ​ 6,108 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 54,345 ​ — ​ 54,345 ​ — ​ 54,345 Cash flow hedges ​ 1,147 ​ — ​ 1,147 ​ — ​ 1,147 Fair value hedges ​ 6,256 ​ — ​ 6,256 ​ — ​ 6,256 ​ The Company assumes interest rate risk (the risk that general interest rate levels will change) as a result of its normal operations. As a result, the fair values of the Company’s financial instruments will change when interest rate levels change and that change may be either favorable or unfavorable to the Company. Management attempts to match maturities of assets and liabilities to the extent believed necessary to minimize interest rate risk. Borrowers with fixed rate obligations, however, are less likely to prepay in a rising rate environment and more likely to prepay in a falling rate environment. Conversely, depositors who are receiving fixed rates are more likely to withdraw funds before maturity in a rising rate environment and less likely to do so in a falling rate environment. Management monitors rates and maturities of assets and liabilities and attempts to minimize interest rate risk by adjusting terms of new loans and deposits and by investing in securities with terms that mitigate the Company’s overall interest rate risk. ​

REVENUE

REVENUE	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
REVENUE	12. REVENUE The majority of the Company’s noninterest income comes from short term contracts associated with fees for services provided on deposit accounts, credit cards, and wealth management accounts and is being accounted for in accordance with Topic 606. Typically, the duration of a contract does not extend beyond the services performed; therefore, the Company concluded that discussion regarding contract balances is immaterial. The Company’s performance obligations on revenue from interchange fees and deposit accounts are generally satisfied immediately, when the transaction occurs, or by month-end. Performance obligations on revenue from fiduciary and asset management fees are generally satisfied monthly or quarterly. For a majority of fee income on deposit accounts the Company is a principal, controlling the promised good or service before transferring it to the customer. For the majority of income related to wealth management income, the Company is an agent, responsible for arranging for the provision of goods and services by another party. Noninterest income disaggregated by major source, for the three and nine months ended September 30, 2020 and 2019, consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ ​ September 30, ​ September 30, September 30, ​ September 30, ​ ​ 2020 ​ 2019 2020 ​ 2019 Noninterest income: ​ ​ ​ ​ ​ Deposit Service Charges (1) ​ ​ ​ ​ ​ Overdraft fees ​ $ 4,231 ​ $ 6,021 ​ $ 13,240 ​ $ 17,847 Maintenance fees & other ​ 1,810 ​ 1,654 ​ 5,309 ​ 4,484 Other service charges, commissions, and fees (1) ​ 1,621 ​ 1,513 ​ 4,600 ​ 4,879 Interchange fees (1) ​ 1,979 ​ 2,108 ​ 5,300 ​ 12,765 Fiduciary and asset management fees (1) ​ ​ ​ ​ ​ ​ ​ ​ Trust asset management fees ​ 2,729 ​ 2,661 ​ 8,026 ​ 5,977 Registered advisor management fees ​ 2,224 ​ 2,219 ​ 6,402 ​ 7,919 Brokerage management fees ​ 1,092 ​ 1,202 ​ 3,115 ​ 2,938 Mortgage banking income ​ 8,897 ​ 3,374 ​ 16,744 ​ 7,614 Gains on securities transactions ​ 18 ​ 7,104 ​ 12,293 ​ 7,306 Bank owned life insurance income ​ 3,421 ​ 2,062 ​ 7,498 ​ 6,191 Loan-related interest rate swap fees ​ 3,170 ​ 5,480 ​ 12,602 ​ 10,656 Other operating income (2)(3) ​ 3,215 ​ 12,708 ​ 4,116 ​ 15,045 Total noninterest income (4) ​ $ 34,407 ​ $ 48,106 ​ $ 99,245 ​ $ 103,621 (1) Income within scope of Topic 606. (2) Includes income within the scope of Topic 606 of $1.2 million and $ 343,000 for the three months ended September 30, 2020 and 2019, respectively, and $ 2.4 million and $ 2.2 million for the nine months ended September 30, 2020 and 2019, respectively. The remaining balance is outside the scope of Topic 606. (3) For the three and nine months ended September 30, 2019, the remaining balance outside the scope of Topic 606 includes $9.3 million from life insurance proceeds received during that period related to a Xenith acquired loan that had been charged off prior to the Company’s acquisition of Xenith. (4) Noninterest income for the discontinued mortgage segment is reported in Note 14 "Segment Reporting & Discontinued Operations." ​ ​

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
EARNINGS PER SHARE	13. EARNINGS PER SHARE Basic EPS is computed by dividing net income to common shareholders, after deducting dividends on preferred stock by the weighted average number of common shares outstanding during the period. Diluted EPS is computed using the weighted average number of common shares outstanding during the period, including the effect of dilutive potential common shares outstanding attributable to stock awards. ​ The following table presents EPS from continuing operations, discontinued operations and total net income available to common shareholders for the three and nine months ended September 30, 2020 and 2019 (dollars in thousands except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ September 30, ​ September 30, ​ ​ 2020 ​ 2019 ​ 2020 ​ 2019 Net Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income from continuing operations ​ $ 61,000 ​ $ 53,196 ​ $ 98,798 ​ $ 137,820 Income (loss) from discontinued operations ​ — ​ 42 ​ — ​ (128) Net Income ​ ​ 61,000 ​ ​ 53,238 ​ ​ 98,798 ​ ​ 137,692 Preferred Stock Dividends ​ ​ 2,691 ​ ​ — ​ ​ 2,691 ​ ​ — Net income available to common shareholders ​ $ 58,309 ​ $ 53,238 ​ $ 96,107 ​ $ 137,692 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average shares outstanding, basic ​ 78,714 ​ 81,769 ​ 78,905 ​ 80,121 Dilutive effect of stock awards and warrants ​ 11 ​ 64 ​ 16 ​ 63 Weighted average shares outstanding, diluted ​ 78,725 ​ 81,833 ​ 78,921 ​ 80,184 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS: ​ ​ ​ ​ ​ ​ ​ ​ EPS from continuing operations ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 EPS from discontinued operations ​ — ​ — ​ — ​ — EPS available to common shareholders ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted EPS: ​ ​ ​ ​ ​ ​ ​ ​ EPS from continuing operations ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 EPS from discontinued operations ​ — ​ — ​ — ​ — EPS available to common shareholders ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 ​

SEGMENT REPORTING & DISCONTINUE

SEGMENT REPORTING & DISCONTINUED OPERATIONS	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
SEGMENT REPORTING & DISCONTINUED OPERATIONS	14. SEGMENT REPORTING & DISCONTINUED OPERATIONS On May 23, 2018, the Bank announced that it had entered into an agreement with a third-party mortgage company TFSB to allow TFSB to offer residential mortgages from certain Bank locations on the terms and conditions set forth in the agreement. Concurrently with that arrangement, the Bank began the process of winding down the operations of UMG, the Company’s reportable mortgage segment. Effective at the close of business June 1, 2018, UMG was no longer originating mortgages in its name. The decision to wind down the operations of UMG was based on a number of strategic priorities and other factors, including the additional investment in the business required to achieve the necessary scale to be competitive. As a result of this decision, the community bank segment is the only remaining reportable segment and does not require separate reporting disclosures. On May 30, 2019, the Bank notified TFSB that the Bank was terminating its primary agreement with TFSB and will no longer allow TFSB to offer residential mortgages from Bank locations. UMG operations remain discontinued, although the Company continues to offer residential mortgages through a division of the Bank. ​ As of and for the three and nine months ended September 30, 2020, the assets and liabilities, as well as the operating results, of the discontinued mortgage segment were not considered material. As of December 31, 2019, the Company’s Consolidated Balance Sheets included assets and liabilities from discontinued operations of $668,000 and $640,000 , respectively. Management believes there are no material on-going obligations with respect to UMG’s business that have not been recorded in the Company’s consolidated financial statements. The following table presents summarized operating results of the discontinued mortgage segment for the three and nine months ended September 30, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ September 30, 2019 September 30, 2019 Net interest income $ — ​ $ — Provision for credit losses ​ — ​ ​ — Net interest income after provision for credit losses ​ — ​ ​ — Noninterest income ​ — ​ ​ 1 Noninterest expenses ​ (56) ​ ​ 174 Income before income taxes ​ 56 ​ ​ (173) Income tax expense (benefit) ​ 14 ​ ​ (45) Net income (loss) on discontinued operations $ 42 ​ $ (128) ​

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	15. SUBSEQUENT EVENTS ​ On October 29, 2020 , the Company’s Board of Directors declared a quarterly dividend of $0.25 per share of common stock. The common stock dividend amount is the same as that paid in the prior quarter and the fourth quarter of 2019. The common stock dividend is payable on November 27, 2020 to common shareholders of record as of November 13, 2020 . ​ The Board also declared a quarterly dividend on the outstanding shares of its Series A preferred stock. The Series A preferred stock is represented by depositary shares, each representing a 1/400 th ownership interest in a share of Series A preferred stock . The dividend of $171.88 per share (equivalent to $0.43 per outstanding depositary share) is payable on December 1, 2020 to preferred shareholders of record as of November 16, 2020 . ​ ​

ACCOUNTING POLICIES (Policies)

ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2020
The Company	The Company Headquartered in Richmond, Virginia, Atlantic Union Bankshares Corporation (Nasdaq: AUB) is the holding company for Atlantic Union Bank. Atlantic Union Bank has 135 branches and approximately 155 ATMs located throughout Virginia, and in portions of Maryland and North Carolina. Middleburg Financial is a brand name used by Atlantic Union Bank and certain affiliates when providing trust, wealth management, private banking, and investment advisory products and services. Certain non-bank affiliates of Atlantic Union Bank include: Old Dominion Capital Management, Inc., and its subsidiary, Outfitter Advisors, Ltd., and Dixon, Hubard, Feinour, & Brown, Inc., which provide investment advisory services, Middleburg Investment Services, LLC, which provides brokerage services; and Union Insurance Group, LLC, which offers various lines of insurance products. The unaudited consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information and follow general practice within the banking industry. Accordingly, the unaudited consolidated financial statements do not include all the information and footnotes required by U.S. GAAP for complete financial statements; however, in the opinion of management, all adjustments necessary for a fair presentation of the results of the interim periods presented have been made. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other period. ​ These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s 2019 Form 10-K. Certain prior period amounts have been reclassified to conform to current period presentation.
Impact of COVID-19	Impact of COVID-19 On March 13, 2020, the United States President declared a national emergency in the face of a growing public health and economic crisis due to the COVID-19 global pandemic. Within a few days of the declaration of a national emergency, governors of states comprising the Company’s geographic footprint issued states of emergency in response to the novel COVID-19. As a result of this pandemic, actions were taken around the world to help mitigate the spread of COVID 19, which have impacted the economies and financial markets of many countries, including the geographical area in which the Company operates. On March 27, 2020, the CARES Act was signed into law. The CARES Act is designated to provide financial relief to the American people and American businesses in response to the economic fallout from COVID-19. On March 22, 2020, the five federal bank regulatory agencies and the Conference of State Bank Supervisors issued joint guidance (subsequently revised on April 7, 2020) with respect to loan modifications for borrowers affected by COVID-19. The CARES Act, as well as the March 22 Joint Guidance, provide enhanced guidelines and accounting for COVID-19 related modifications. ​ The federal banking regulators have confirmed with the FASB that short-term loan modifications made on a good faith basis in response to COVID-19 to borrowers who were current (i.e., less than 30 days past due on contractual payments) when the modification program was implemented are not considered TDRs. In addition, Section 4013 of the CARES Act provides banks, savings associations, and credit unions with the ability to make loan modifications related to COVID-19 without categorizing the loan as a TDR or conducting the analysis to make the determination, which is intended to streamline the loan modification process. Any such suspension is effective for the term of the loan modification; however, the suspension is only permitted for loan modifications made during the effective period of Section 4013 and only for those loans that were not more than thirty days past due as of December 31, 2019. The Company has made $1.8 billion of loan modifications pursuant to the March 22 Joint Guidance or Section 4013 of the CARES Act and as of September 30, 2020 approximately $769.6 million remain under their modified terms. The majority of the Company’s modifications as of September 30, 2020 were in the commercial real estate portfolios. ​ The Bank processed over 11,000 PPP loans, which totaled $1.7 billion with a recorded investment of $1.6 billion as of September 30, 2020, which included unamortized deferred fees of $32.6 million. The loans carry a 1% interest rate.
Adoption of New Accounting Standards	Adoption of New Accounting Standards On January 1, 2020, the Company adopted ASC 326. This ASU updates the existing guidance to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. This ASU replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to- maturity debt securities. It also applies to unfunded credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). The Company established a cross-functional governance structure to oversee the Company’s implementation of the CECL methodology, which included evaluating key assumptions used and assessing the internal controls over financial reporting related to the adoption of ASC 326. The Company adopted ASC 326 using the modified retrospective method for all financial assets measured at amortized cost and unfunded credit exposures. 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. As a result of adopting ASC 326, the Company recorded a net decrease to retained earnings of $39.1 million. ASC 326 also replaced the Company’s current accounting for PCI loans. With the adoption of ASC 326, previously classified PCI loans are now classified as PCD loans. In accordance with ASC 326, the Company did not re-assess whether individual modifications were needed to individual acquired financial assets accounted for in the pools with troubled debt restructurings as of the date of adoption. The Company adopted ASC 326 using the prospective transition approach for financial assets with PCD that were previously identified as PCI and accounted for under ASC 310-30. On January 1, 2020, the amortized cost basis of the PCD assets were adjusted to reflect the addition of $2.4 million to the ACL. The remaining noncredit discount (based on the adjusted amortized cost basis) will be accreted into interest income at the effective interest rate as of January 1, The Company adopted ASC 326 using the prospective transition approach for debt securities. The effective interest rate on these debt securities was not changed. Upon adoption of ASC 326, the Company did not have any securities included in its portfolio where OTTI had previously been The following table illustrates the impact of ASC ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ January 1, ​ January 1, ​ ​ 2019 ​ 2020 ​ 2020 ​ ​ As Previously Reported (Incurred Loss) ​ Impact of CECL Adoption ​ As Reported Under CECL Assets: ​ ​ ​ ​ ​ ​ Loans ​ ​ ​ ​ ​ ​ Commercial $ 30,941 $ 6,184 $ 37,125 Consumer ​ 11,353 ​ 41,300 ​ 52,653 Allowance for loan and lease losses ​ 42,294 ​ 47,484 ​ 89,778 Liabilities: ​ ​ ​ ​ ​ ​ Allowance for credit losses on unfunded credit exposure ​ 900 ​ 4,160 ​ 5,060 Total Allowance for credit losses $ 43,194 $ 51,644 $ 94,838
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses The provision for loan losses charged to operations is an amount sufficient to bring the allowance to an estimated balance that management considers adequate to absorb expected losses in the Company’s loan portfolio. The ALLL is a valuation account that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Amortized cost is the principal balance outstanding, net of any purchase premiums and discounts and net of any deferred loan fees and costs. The ALLL represents management’s estimate of credit losses over the remaining life of the loan portfolio. Loans are charged off against the ALLL when management believes the loan balance is no longer collectible. Subsequent recoveries of previously charged off amounts are recorded as increases to the Management’s determination of the adequacy of the ALLL is based on an evaluation of the composition of the loan portfolio, the value and adequacy of collateral, current economic conditions, historical loan loss experience, reasonable and supportable forecasts, and other risk factors. The ALLL is estimated by pooling loans by call code and credit risk indicator and applying a loan-level PD/LGD method for all loans with the exception of its auto and third party consumer lending portfolios. For auto and third party consumer portfolios, the Company has elected to pool those loans based on similar risk characteristics to determine the ALLL using vintage and loss rate methods. The Company utilizes a forecast period of two years and then reverts to the mean of historical loss factors on a straight-line basis over the following two-year period. The Company considers economic forecasts and recession probabilities from highly recognized third-parties to inform the model for loss estimation. The Company’s ALLL estimate is particularly impacted by the unemployment rate forecast in its geographic footprint. In the current quarter forecast, the unemployment rate in the Company’s geographic footprint is projected to remain significantly elevated through the forecast period. Management also considers qualitative factors when estimating loan losses to take into account model limitations. For the current quarter, the largest qualitative additions were related to industries that are particularly impacted by the COVID-19 pandemic and uncertainty regarding the extent and duration of the pandemic and the timing and efficacy of any potential future government stimulus. These qualitative factors were partially offset by qualitative reductions meant to account for enhanced unemployment benefits, bank deferrals, the PPP loan program and other factors. The Company’s Allowance Committee approves the key methodologies and assumptions, as well as the final ALLL on a quarterly basis. While management uses available information to estimate expected losses on loans, future changes in the ALLL may be necessary based on changes in portfolio composition, portfolio credit quality, and/or economic conditions. Loans that do not share risk characteristics are evaluated on an individual basis. The individual reserve component relates to loans that have shown substantial credit deterioration as measured by risk rating and/or delinquency status. In addition, the Company has elected the practical expedient that would include loans for individual assessment consideration if the repayment of the loan is expected substantially through the operation or sale of collateral because the borrower is experiencing financial difficulty. Where the source of repayment is the sale of collateral, the ALLL is based on the fair value of the underlying collateral, less selling costs, compared to the amortized cost basis of the loan. If the ALLL is based on the operation of the collateral, the reserve is calculated based on the fair value of the collateral calculated as the present value of expected cash flows from the operation of the collateral, compared to the amortized cost basis. If the Company determines that the value of a collateral dependent loan is less than the recorded investment in the loan, the Company charges off the deficiency if it is determined that such amount is deemed to be a confirmed loss. Typically, a loss is confirmed when the Company is moving towards foreclosure (or final disposition). In situations where, for economic or legal reasons related to a borrower’s financial condition, the Company grants a concession in the loan structure to the borrower that it would not otherwise consider, the related loan is classified as a TDR. With the exception of loans with interest rate concessions, the ALLL on a TDR is measured using the same method as all other loans held for investment. For loans with interest rate concessions, the Company uses a discounted cash flow approach using the original interest rate.
Accrued Interest Receivable	Accrued Interest Receivable The Company has elected to exclude accrued interest from the amortized cost basis in its determination of the ACL reserve for both loans and HTM securities, as well as elected the policy to write-off accrued interest receivable directly through the reversal of interest income. Accrued interest receivable totaled $55.4 million on loans held for investment and, $5.1 million on HTM securities at September 30, 2020 and is included in “Other Assets” on the Company’s Consolidated Balance Sheets.
Acquired Loans	Acquired Loans The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. Acquired loans are recorded at their fair value at acquisition date without carryover of the acquiree’s previously established ALLL, as credit discounts are included in the determination of fair value. The fair value of the loans is determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected on the loans and then applying a market-based discount rate to those cash flows. During evaluation upon acquisition, acquired loans are also classified as either PCD or acquired performing. The purchase discount on acquired performing loans is accounted for under ASC 310-20, Receivables – Nonrefundable Fees and Other Costs PCD loans reflect loans that have experienced more-than-insignificant credit deterioration since origination. These PCD loans are accounted for under ASC 326 . PCD loans are recorded at the amount paid. An ALLL is determined using the same methodology as other loans held for investment. For PCD loans not individually assessed, the initial ALLL is determined on a collective basis and is allocated to individual loans. The sum of the loan's purchase price and ALLL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. The
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of reporting cash flows, the Company defines cash and cash equivalents as cash, cash due from banks, interest-bearing deposits in other banks, money market investments, other interest-bearing deposits, and federal funds sold. ​ Restricted cash is disclosed in Note 8 “Commitments and Contingencies” and is comprised of cash maintained at various correspondent banks as collateral for the Company’s derivative portfolio and is included in interest-bearing deposits in other banks in the Company’s Consolidated Balance Sheets. In addition, the Company is required to maintain reserve balances with the Federal Reserve Bank based on the type and amount of deposits; however, on March 15, 2020 the Federal Reserve Board announced that reserve requirement ratios would be reduced to zero percent effective March 26, 2020 due to economic conditions, which eliminated the reserve requirement for all depository institutions.
Investment Securities	Investment Securities Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are generally amortized on the level-yield method without anticipating prepayments, except for mortgage-backed securities The Company regularly evaluates all securities whose values have declined below amortized cost to assess whether the decline in fair value is the result of credit impairment. For AFS securities, the Company evaluates the fair value and credit quality of its AFS securities on at least a quarterly basis. In the event the fair value of a security falls below its amortized cost basis, the security will be evaluated to determine whether the decline in value was caused by changes in market interest rates or security credit quality. The primary indicators of credit quality for the Company’s AFS portfolio are security type and credit rating, which are influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, structure, credit enhancement and other factors. There is currently no ACL held against the Company’s AFS securities portfolio at September 30, 2020. See Note 3 “Securities,” for additional information on the Company’s ACL analysis. If unrealized losses are related to credit quality, the Company estimates the credit related loss by evaluating the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis of the security and a credit loss exists, an ACL shall be recorded for the credit loss, limited by the amount that the fair value is less than amortized cost basis. Non-credit related declines in fair value are recognized in other comprehensive income, net of applicable taxes. Changes in the ACL are recorded as provision for (or reversal of) credit loss expense. Charge-offs are recorded against the ACL when management believes the AFS security is no longer collectible. Currently, the Company does not have an ACL on its AFS debt securities portfolio. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent. The Company evaluates the credit risk of its HTM securities on at least a quarterly basis. Management estimates expected credit losses on held-to-maturity debt securities based on an individual basis based on the PD/LGD methodology primarily using security-level credit ratings. Management recorded an immaterial ACL on HTM securities as a result of the adoption of ASC 326, and no additional changes were needed at September 30, 2020.
Unfunded Commitments
Allowance for Credit Losses	Reserve for Unfunded Commitments The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The reserve for unfunded commitments is adjusted as a provision for credit loss expense and is measured using the same measurement objectives as the ALLL. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded and is included in “Other Liabilities” within the Company’s Consolidated Balance Sheets.

ACCOUNTING POLICIES (Tables)

ACCOUNTING POLICIES (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Illustration of the Impact of ASC 326	The following table illustrates the impact of ASC ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ January 1, ​ January 1, ​ ​ 2019 ​ 2020 ​ 2020 ​ ​ As Previously Reported (Incurred Loss) ​ Impact of CECL Adoption ​ As Reported Under CECL Assets: ​ ​ ​ ​ ​ ​ Loans ​ ​ ​ ​ ​ ​ Commercial $ 30,941 $ 6,184 $ 37,125 Consumer ​ 11,353 ​ 41,300 ​ 52,653 Allowance for loan and lease losses ​ 42,294 ​ 47,484 ​ 89,778 Liabilities: ​ ​ ​ ​ ​ ​ Allowance for credit losses on unfunded credit exposure ​ 900 ​ 4,160 ​ 5,060 Total Allowance for credit losses $ 43,194 $ 51,644 $ 94,838

SECURITIES (Tables)

SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2020
Amortized Cost of HTM Securities by Security Type and Credit Rating	The following table presents the amortized cost of HTM securities as of September 30, 2020 by security type and credit rating (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2020 ​ U.S. Government and Agency Obligations of states and political Mortgage-backed ​ Total HTM ​ ​ securities ​ subdivisions ​ securities ​ securities Credit Rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ AAA/AA/A ​ $ — ​ $ 533,742 ​ $ — ​ $ 533,742 Not Rated - Agency (1) ​ ​ 2,767 ​ ​ — ​ ​ 5,542 ​ ​ 8,309 Not Rated - Non-Agency ​ ​ — ​ 4,610 ​ ​ — ​ ​ 4,610 Total ​ $ 2,767 ​ $ 538,352 ​ $ 5,542 ​ $ 546,661 (1) Generally considered not to have credit risk given the government guarantees associated with these agencies
Gross Realized Gain and Losses on the Sale of Securities	The following table presents the gross realized gains and losses on and the proceeds from the sale of securities during the three and nine months ended September 30, 2020 and 2019 (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ ​ September 30, 2020 ​ September 30, 2020 Realized gains (losses): ​ ​ Gross realized gains ​ $ 18 ​ $ 12,522 Gross realized losses ​ — ​ (229) Net realized gains ​ $ 18 ​ $ 12,293 ​ ​ ​ ​ ​ ​ ​ Proceeds from sales of securities ​ $ 4,675 ​ $ 232,946 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ ​ September 30, 2019 ​ September 30, 2019 Realized gains (losses): ​ ​ Gross realized gains ​ $ 7,104 ​ $ 9,161 Gross realized losses ​ — ​ (1,855) Net realized gains ​ $ 7,104 ​ $ 7,306 ​ ​ ​ ​ ​ ​ ​ Proceeds from sales of securities ​ $ 98,975 ​ $ 486,925
Available-for-sale Securities
Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Values of Investment Securities	The amortized cost, gross unrealized gains and losses, and estimated fair values of AFS securities as of September 30, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated ​ Cost Gains (Losses) Fair Value September 30, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 13,463 ​ $ 465 ​ $ (50) ​ $ 13,878 Obligations of states and political subdivisions ​ 759,936 ​ 39,033 ​ (2,113) ​ 796,856 Corporate and other bonds (1) ​ 147,438 ​ 2,217 ​ (737) ​ 148,918 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 340,706 ​ 17,945 ​ (116) ​ ​ 358,535 Non-agency ​ ​ 30,359 ​ 71 ​ — ​ ​ 30,430 Total commercial mortgage-backed securities ​ ​ 371,065 ​ 18,016 ​ (116) ​ ​ 388,965 Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 960,141 ​ 35,275 ​ (1,410) ​ ​ 994,006 Non-agency ​ ​ 99,252 ​ 587 ​ (743) ​ ​ 99,096 Total residential mortgage-backed securities ​ ​ 1,059,393 ​ 35,862 ​ (2,153) ​ ​ 1,093,102 Other securities ​ 1,621 ​ — ​ — ​ 1,621 Total AFS securities ​ $ 2,352,916 ​ $ 95,593 ​ $ (5,169) ​ $ 2,443,340 (1) Other bonds include asset-backed securities. The amortized cost, gross unrealized gains and losses, and estimated fair values of AFS securities as of December 31, 2019 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated December 31, 2019 Cost Gains (Losses) Fair Value U.S. government and agency securities ​ $ 21,149 ​ $ 209 ​ $ (38) ​ $ 21,320 Obligations of states and political subdivisions ​ ​ 421,344 ​ ​ 25,776 ​ ​ (29) ​ ​ 447,091 Corporate and other bonds (1) ​ 134,342 ​ 1,991 ​ (374) ​ 135,959 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 405,731 ​ ​ 8,786 ​ ​ (619) ​ ​ 413,898 Non-agency ​ ​ 11,173 ​ ​ — ​ ​ (24) ​ ​ 11,149 Total commercial mortgage-backed securities ​ ​ 416,904 ​ ​ 8,786 ​ ​ (643) ​ ​ 425,047 Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 852,300 ​ ​ 16,680 ​ ​ (816) ​ ​ 868,164 Non-agency ​ ​ 44,309 ​ ​ 476 ​ ​ — ​ ​ 44,785 Total residential mortgage-backed securities ​ ​ 896,609 ​ ​ 17,156 ​ ​ (816) ​ ​ 912,949 Other securities ​ 3,079 ​ — ​ — ​ 3,079 Total AFS securities ​ $ 1,893,427 ​ $ 53,918 ​ $ (1,900) ​ $ 1,945,445 (1) Other bonds include asset-backed securities
Schedule of Gross Unrealized Losses and Fair Value of Investments	The following table shows the gross unrealized losses and fair value of the Company’s AFS securities with unrealized losses for which an allowance for credit losses has not been recorded at September 30, 2020 and that are not deemed to be other than temporarily impaired as of December 31, 2019. These are aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ More than 12 months ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ Value ​ Losses ​ Value ​ Losses ​ Value ​ Losses September 30, 2020 ​ ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ — ​ $ — ​ $ 5,956 ​ $ (50) ​ $ 5,956 ​ ​ (50) Obligations of states and political subdivisions ​ ​ 175,282 ​ ​ (2,113) ​ ​ — ​ ​ — ​ ​ 175,282 ​ $ (2,113) Corporate and other bonds (1) ​ 38,137 ​ (477) ​ 20,283 ​ (260) ​ 58,420 ​ (737) Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 33,827 ​ ​ (115) ​ ​ 446 ​ ​ (1) ​ ​ 34,273 ​ ​ (116) Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total commercial mortgage-backed securities ​ ​ 33,827 ​ ​ (115) ​ ​ 446 ​ ​ (1) ​ ​ 34,273 ​ ​ (116) Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 198,687 ​ ​ (1,407) ​ ​ 1,121 ​ ​ (3) ​ ​ 199,808 ​ ​ (1,410) Non-agency ​ ​ 57,044 ​ ​ (743) ​ ​ — ​ ​ — ​ ​ 57,044 ​ ​ (743) Total residential mortgage-backed securities ​ ​ 255,731 ​ ​ (2,150) ​ ​ 1,121 ​ ​ (3) ​ ​ 256,852 ​ ​ (2,153) Total AFS securities ​ $ 502,977 ​ $ (4,855) ​ $ 27,806 ​ $ (314) ​ $ 530,783 ​ $ (5,169) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 7,638 ​ $ (38) ​ $ — ​ $ — ​ $ 7,638 ​ $ (38) Obligations of states and political subdivisions ​ ​ 4,526 ​ ​ (29) ​ ​ — ​ ​ — ​ ​ 4,526 ​ ​ (29) Corporate and other bonds (1) ​ 17,323 ​ (83) ​ 19,901 ​ (291) ​ 37,224 ​ (374) Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 43,552 ​ ​ (530) ​ ​ 14,966 ​ ​ (89) ​ ​ 58,518 ​ ​ (619) Non-agency ​ ​ 11,162 ​ ​ (24) ​ ​ — ​ ​ — ​ ​ 11,162 ​ ​ (24) Total commercial mortgage-backed securities ​ ​ 54,714 ​ ​ (554) ​ ​ 14,966 ​ ​ (89) ​ ​ 69,680 ​ ​ (643) Residential mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 114,147 ​ ​ (500) ​ ​ 40,168 ​ ​ (316) ​ ​ 154,315 ​ ​ (816) Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total residential mortgage-backed securities ​ ​ 114,147 ​ ​ (500) ​ ​ 40,168 ​ ​ (316) ​ ​ 154,315 ​ ​ (816) Total AFS securities ​ $ 198,348 ​ $ (1,204) ​ $ 75,035 ​ $ (696) ​ $ 273,383 ​ $ (1,900) (1) Other bonds includes asset-backed securities.
Schedule of Amortized Cost and Estimated Fair Value of Securities	The following table presents the amortized cost and estimated fair value of AFS securities as of September 30, 2020 and December 31, 2019, by contractual maturity. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ December 31, 2019 ​ Amortized Estimated Amortized Estimated ​ ​ Cost ​ Fair Value ​ Cost ​ Fair Value Due in one year or less ​ $ 28,581 ​ $ 28,834 ​ $ 35,177 ​ $ 35,329 Due after one year through five years ​ 140,844 ​ 148,114 ​ 164,605 ​ 166,873 Due after five years through ten years ​ 251,501 ​ 258,806 ​ 249,713 ​ 254,790 Due after ten years ​ 1,931,990 ​ 2,007,586 ​ 1,443,932 ​ 1,488,453 Total AFS securities ​ $ 2,352,916 ​ $ 2,443,340 ​ $ 1,893,427 ​ $ 1,945,445
Held-to-maturity Securities
Schedule of Amortized Cost and Estimated Fair Value of Securities	The following table presents the amortized cost and estimated fair value of HTM securities as of September 30, 2020 and December 31, 2019, by contractual maturity. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ December 31, 2019 ​ Carrying Estimated Carrying Estimated ​ ​ Value ​ Fair Value ​ Value ​ Fair Value Due in one year or less ​ $ 1,005 ​ $ 1,024 ​ $ 502 ​ $ 504 Due after one year through five years ​ 9,076 ​ 9,436 ​ 10,258 ​ 10,539 Due after five years through ten years ​ 1,749 ​ 1,796 ​ 1,768 ​ 1,800 Due after ten years ​ 534,831 ​ 601,917 ​ 542,616 ​ 590,660 Total HTM securities ​ $ 546,661 ​ $ 614,173 ​ $ 555,144 ​ $ 603,503
Schedule of Carrying Values, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities	The carrying value, gross unrealized gains and losses, and estimated fair values of HTM securities as of September 30, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Gross Unrealized ​ Estimated ​ Value Gains (Losses) ​ Fair Value September 30, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 2,767 ​ $ — ​ $ (14) ​ $ 2,753 Obligations of states and political subdivisions ​ ​ 538,352 ​ ​ 67,561 ​ ​ — ​ ​ 605,913 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 5,542 ​ ​ 5 ​ ​ (40) ​ ​ 5,507 Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total commercial mortgage-backed securities ​ ​ 5,542 ​ ​ 5 ​ ​ (40) ​ ​ 5,507 Total held-to-maturity securities ​ $ 546,661 ​ $ 67,566 ​ $ (54) ​ $ 614,173 ​ The carrying value, gross unrealized gains and losses, and estimated fair values of HTM securities as of December 31, 2019 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Gross Unrealized ​ Estimated ​ Value Gains (Losses) Fair Value December 31, 2019 ​ ​ ​ ​ U.S. government and agency securities ​ $ 2,813 ​ $ 26 ​ $ — ​ $ 2,839 Obligations of states and political subdivisions ​ ​ 545,148 ​ ​ 48,274 ​ ​ — ​ ​ 593,422 Commercial mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ Agency ​ ​ 7,183 ​ ​ 59 ​ ​ — ​ ​ 7,242 Non-agency ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total commercial mortgage-backed securities ​ ​ 7,183 ​ ​ 59 ​ ​ — ​ ​ 7,242 Total held-to-maturity securities ​ $ 555,144 ​ $ 48,359 ​ $ — ​ $ 603,503

LOANS AND ALLOWANCE FOR LOAN _2

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	9 Months Ended
	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Stated at Face Amount, Net of Unearned Income	The Company’s loans are stated at their face amount, net of deferred fees and costs, and consist of the following at September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 December 31, 2019 Construction and Land Development ​ $ 1,207,190 ​ $ 1,250,924 Commercial Real Estate - Owner Occupied ​ 2,107,333 ​ 2,041,243 Commercial Real Estate - Non-Owner Occupied ​ 3,497,929 ​ 3,286,098 Multifamily Real Estate ​ 731,582 ​ 633,743 Commercial & Industrial (1) ​ 3,536,249 ​ 2,114,033 Residential 1-4 Family - Commercial ​ 696,944 ​ 724,337 Residential 1-4 Family - Consumer ​ 830,144 ​ 890,503 Residential 1-4 Family - Revolving ​ 618,320 ​ 659,504 Auto ​ 387,417 ​ 350,419 Consumer ​ 276,023 ​ 372,853 Other Commercial (1) ​ 494,084 ​ 287,279 Total loans held for investment, net of deferred fees and costs ​ ​ 14,383,215 ​ ​ 12,610,936 Allowance for loan and lease losses ​ ​ (174,122) ​ ​ (42,294) Total loans held for investment, net ​ $ 14,209,093 ​ $ 12,568,642 (1) Commercial & industrial and other commercial loans include approximately $1.6 billion and $21.3 million, respectively, in new loans from the PPP loan program at September 30, 2020.
Summary of Aging of the Loan Portfolio by Class	The following table shows the aging of the Company’s loan portfolio, by class, at September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater than ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days and ​ ​ ​ ​ ​ ​ ​ ​ Current ​ Past Due ​ Past Due ​ still Accruing ​ Nonaccrual ​ Total Loans Construction and Land Development ​ $ 1,200,729 ​ $ 2,625 ​ $ 223 ​ $ 93 ​ $ 3,520 ​ $ 1,207,190 Commercial Real Estate - Owner Occupied ​ 2,090,106 ​ 4,924 ​ 1,310 ​ 1,726 ​ 9,267 ​ 2,107,333 Commercial Real Estate - Non-Owner Occupied ​ 3,493,107 ​ 1,291 ​ 1,371 ​ 168 ​ 1,992 ​ 3,497,929 Multifamily Real Estate ​ 731,190 ​ — ​ — ​ 359 ​ 33 ​ 731,582 Commercial & Industrial ​ 3,528,283 ​ 4,322 ​ 1,448 ​ 604 ​ 1,592 ​ 3,536,249 Residential 1-4 Family - Commercial ​ 683,730 ​ 1,236 ​ 937 ​ 5,298 ​ 5,743 ​ 696,944 Residential 1-4 Family - Consumer ​ 806,055 ​ 2,998 ​ 3,976 ​ 4,495 ​ 12,620 ​ 830,144 Residential 1-4 Family - Revolving ​ 608,570 ​ 2,669 ​ 1,141 ​ 2,276 ​ 3,664 ​ 618,320 Auto ​ 384,619 ​ 1,513 ​ 453 ​ 315 ​ 517 ​ 387,417 Consumer ​ 273,829 ​ 1,020 ​ 772 ​ 327 ​ 75 ​ 276,023 Other Commercial ​ ​ 493,044 ​ ​ 613 ​ ​ 427 ​ ​ — ​ ​ — ​ ​ 494,084 Total loans held for investment ​ $ 14,293,262 ​ $ 23,211 ​ $ 12,058 ​ $ 15,661 ​ $ 39,023 ​ $ 14,383,215 The following table shows the aging of the Company’s loan portfolio, by class, at December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater than ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ still Accruing ​ PCI ​ Nonaccrual ​ Current ​ Total Loans Construction and Land Development ​ $ 4,563 ​ $ 482 ​ $ 189 ​ $ 10,944 ​ $ 3,703 ​ $ 1,231,043 ​ $ 1,250,924 Commercial Real Estate - Owner Occupied ​ 3,482 ​ 2,184 ​ 1,062 ​ 27,438 ​ 6,003 ​ 2,001,074 ​ 2,041,243 Commercial Real Estate - Non-Owner Occupied ​ 457 ​ — ​ 1,451 ​ 14,565 ​ 381 ​ 3,269,244 ​ 3,286,098 Multifamily Real Estate ​ 223 ​ — ​ 474 ​ 94 ​ — ​ 632,952 ​ 633,743 Commercial & Industrial ​ 8,698 ​ 1,598 ​ 449 ​ 1,579 ​ 1,735 ​ 2,099,974 ​ 2,114,033 Residential 1-4 Family - Commercial ​ 1,479 ​ 2,207 ​ 674 ​ 12,205 ​ 4,301 ​ 703,471 ​ 724,337 Residential 1-4 Family - Consumer ​ 16,244 ​ 3,072 ​ 4,515 ​ 14,713 ​ 9,292 ​ 842,667 ​ 890,503 Residential 1-4 Family - Revolving ​ 10,190 ​ 1,784 ​ 3,357 ​ 4,127 ​ 2,080 ​ 637,966 ​ 659,504 Auto ​ 2,525 ​ 236 ​ 272 ​ 4 ​ 563 ​ 346,819 ​ 350,419 Consumer ​ 2,128 ​ 1,233 ​ 953 ​ 668 ​ 77 ​ 367,794 ​ 372,853 Other Commercial ​ ​ 464 ​ ​ — ​ ​ — ​ ​ 344 ​ ​ 97 ​ ​ 286,374 ​ ​ 287,279 Total loans held for investment ​ $ 50,453 ​ $ 12,796 ​ $ 13,396 ​ $ 86,681 ​ $ 28,232 ​ $ 12,419,378 ​ $ 12,610,936
Summary of Loans on Nonaccrual Status	The following table shows the Company’s amortized cost basis of loans on nonaccrual status as of January 1, 2020 as well as amortized cost basis of loans on nonaccrual status and loans past due 90 days and still accruing as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonaccrual ​ ​ ​ ​ ​ ​ ​ ​ January 1, 2020 ​ September 30, 2020 ​ Nonaccrual With No ALLL ​ 90 Days and still Accruing Construction and Land Development ​ $ 4,060 ​ $ 3,520 ​ $ 1,985 ​ $ 93 Commercial Real Estate - Owner Occupied ​ ​ 13,889 ​ ​ 9,267 ​ ​ 1,994 ​ ​ 1,726 Commercial Real Estate - Non-Owner Occupied ​ ​ 1,368 ​ ​ 1,992 ​ ​ — ​ ​ 168 Multifamily Real Estate ​ ​ — ​ ​ 33 ​ ​ — ​ ​ 359 Commercial & Industrial ​ ​ 3,037 ​ ​ 1,592 ​ ​ — ​ ​ 604 Residential 1-4 Family - Commercial ​ ​ 6,492 ​ ​ 5,743 ​ ​ 1,738 ​ ​ 5,298 Residential 1-4 Family - Consumer ​ ​ 13,117 ​ ​ 12,620 ​ ​ 1,069 ​ ​ 4,495 Residential 1-4 Family - Revolving ​ ​ 2,490 ​ ​ 3,664 ​ ​ 60 ​ ​ 2,276 Auto ​ ​ 565 ​ ​ 517 ​ ​ — ​ ​ 315 Consumer ​ ​ 88 ​ ​ 75 ​ ​ — ​ ​ 327 Other Commercial ​ ​ 98 ​ ​ — ​ ​ — ​ ​ — Total loans held for investment ​ $ 45,204 ​ $ 39,023 ​ $ 6,846 ​ $ 15,661
Impaired Loans by Class	As of December 31, 2019, the Company measured the amount of impairment by evaluating loans either in their collective homogeneous pools or individually. The following table shows the Company’s loans, excluding PCI loans, by class at December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ Unpaid ​ ​ ​ ​ Recorded ​ Principal ​ Related ​ ​ Investment ​ Balance ​ Allowance Loans without a specific allowance ​ ​ ​ Construction and Land Development ​ $ 5,877 ​ $ 7,174 ​ $ — Commercial Real Estate - Owner Occupied ​ 8,801 ​ 9,296 ​ — Commercial Real Estate - Non-Owner Occupied ​ 3,510 ​ 4,059 ​ — Commercial & Industrial ​ 3,668 ​ 3,933 ​ — Residential 1-4 Family - Commercial ​ 4,047 ​ 4,310 ​ — Residential 1-4 Family - Consumer ​ 8,420 ​ 9,018 ​ — Residential 1-4 Family - Revolving ​ 862 ​ 865 ​ — Total impaired loans without a specific allowance ​ $ 35,185 ​ $ 38,655 ​ $ — Loans with a specific allowance ​ ​ ​ Construction and Land Development ​ $ 984 ​ $ 1,032 ​ $ 49 Commercial Real Estate - Owner Occupied ​ 2,820 ​ 3,093 ​ 146 Commercial Real Estate - Non-Owner Occupied ​ 335 ​ 383 ​ 2 Commercial & Industrial ​ 2,568 ​ 2,590 ​ 619 Residential 1-4 Family - Commercial ​ 1,726 ​ 1,819 ​ 162 Residential 1-4 Family - Consumer ​ 12,026 ​ 12,670 ​ 1,242 Residential 1-4 Family - Revolving ​ 2,186 ​ 2,369 ​ 510 Auto ​ 563 ​ 879 ​ 221 Consumer ​ 168 ​ 336 ​ 46 Other Commercial ​ ​ 562 ​ ​ 567 ​ ​ 30 Total impaired loans with a specific allowance ​ $ 23,938 ​ $ 25,738 ​ $ 3,027 Total impaired loans ​ $ 59,123 ​ $ 64,393 ​ $ 3,027 ​ The following table shows the average recorded investment and interest income recognized for the Company’s loans, excluding PCI loans, by class for the three and nine months ended September 30, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ September 30, 2019 ​ September 30, 2019 ​ ​ ​ Interest ​ ​ Interest ​ ​ Average ​ Income ​ Average ​ Income ​ ​ Investment ​ Recognized ​ Investment ​ Recognized Construction and Land Development ​ $ 13,581 ​ $ 40 ​ $ 13,601 ​ $ 351 Commercial Real Estate - Owner Occupied ​ 13,301 ​ 85 ​ 13,436 ​ 339 Commercial Real Estate - Non-Owner Occupied ​ 2,748 ​ 26 ​ 3,543 ​ 82 Multifamily Real Estate ​ ​ 1,217 ​ ​ 15 ​ ​ 1,234 ​ ​ 46 Commercial & Industrial ​ 3,986 ​ 41 ​ 4,046 ​ 129 Residential 1-4 Family - Commercial ​ 6,334 ​ 41 ​ 6,521 ​ 125 Residential 1-4 Family - Consumer ​ 19,802 ​ 75 ​ 20,007 ​ 264 Residential 1-4 Family - Revolving ​ 2,125 ​ 5 ​ 2,242 ​ 31 Auto ​ 691 ​ — ​ 781 ​ 9 Consumer ​ 184 ​ 2 ​ 192 ​ 5 Other Commercial ​ ​ 570 ​ ​ 7 ​ ​ 579 ​ ​ 21 Total impaired loans ​ $ 64,539 ​ $ 337 ​ $ 66,182 ​ $ 1,402
Summary of Modified Loans that Continue to Accrue Interest Under the Terms of Restructuring Agreement	The following table provides a summary, by class, of TDRs that continue to accrue interest under the terms of the applicable restructuring agreement, which are considered to be performing, and TDRs that have been placed on nonaccrual status, which are considered to be nonperforming, as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ No. of Recorded Outstanding ​ ​ Loans ​ Investment ​ Commitment Performing ​ ​ Construction and Land Development 4 ​ $ 219 ​ $ — Commercial Real Estate - Owner Occupied 6 ​ 2,140 ​ 101 Commercial Real Estate - Non-Owner Occupied 1 ​ 1,089 ​ — Commercial & Industrial 5 ​ 1,117 ​ — Residential 1-4 Family - Commercial 3 ​ 247 ​ — Residential 1-4 Family - Consumer 80 ​ 9,165 ​ — Residential 1-4 Family - Revolving 2 ​ 55 ​ — Consumer 5 ​ 31 ​ — Other Commercial ​ 1 ​ ​ 452 ​ ​ — Total performing 107 ​ $ 14,515 ​ $ 101 Nonperforming ​ ​ Commercial Real Estate - Owner Occupied 2 ​ $ 293 ​ $ — Commercial Real Estate - Non-Owner Occupied ​ 1 ​ ​ 137 ​ ​ — Commercial & Industrial 3 ​ 261 ​ — Residential 1-4 Family - Commercial 4 ​ 1,313 ​ — Residential 1-4 Family - Consumer 23 ​ 4,937 ​ — Residential 1-4 Family - Revolving 3 ​ 104 ​ — Total nonperforming 36 ​ $ 7,045 ​ $ — Total performing and nonperforming 143 ​ $ 21,560 ​ $ 101 The following table provides a summary, by class, of TDRs that continue to accrue interest under the terms of the applicable restructuring agreement, which are considered to be performing, and TDRs that have been placed on nonaccrual status, which are considered to be nonperforming, as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ No. of Recorded Outstanding ​ ​ Loans ​ Investment ​ Commitment Performing ​ ​ Construction and Land Development 4 ​ $ 1,114 ​ $ — Commercial Real Estate - Owner Occupied 6 ​ 2,228 ​ 26 Commercial Real Estate - Non-Owner Occupied 1 ​ 1,089 ​ — Commercial & Industrial 4 ​ 1,020 ​ — Residential 1-4 Family - Commercial 5 ​ 290 ​ — Residential 1-4 Family - Consumer 69 ​ 9,396 ​ — Residential 1-4 Family - Revolving 2 ​ 56 ​ — Consumer 4 ​ 29 ​ — Other Commercial ​ 1 ​ ​ 464 ​ ​ — Total performing 96 ​ $ 15,686 ​ $ 26 Nonperforming ​ ​ Commercial Real Estate - Owner Occupied 2 ​ $ 176 ​ $ — Commercial & Industrial 1 ​ 55 ​ — Residential 1-4 Family - Consumer 19 ​ 3,522 ​ — Residential 1-4 Family - Revolving 2 ​ 57 ​ — Total nonperforming 24 ​ $ 3,810 ​ $ — Total performing and nonperforming 120 ​ $ 19,496 ​ $ 26
Schedule of TDR by Class and Modification Type	The following table shows, by class and modification type, TDRs that occurred during the three and nine months ended September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended September 30, 2020 ​ Nine Months Ended September 30, 2020 ​ ​ Recorded ​ Recorded ​ ​ No. of ​ Investment at ​ No. of ​ Investment at ​ ​ Loans ​ Period End ​ Loans ​ Period End Modified to interest only, at a market rate ​ ​ Commercial Real Estate - Owner Occupied ​ — ​ $ — ​ 1 ​ $ 272 Residential 1-4 Family - Commercial ​ 1 ​ ​ 652 ​ 1 ​ ​ 652 Total interest only at market rate of interest 1 ​ $ 652 2 ​ $ 924 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, at a market rate ​ ​ Commercial & Industrial — ​ $ — 3 ​ $ 127 Residential 1-4 Family - Commercial 1 ​ ​ 299 1 ​ ​ 299 Residential 1-4 Family - Consumer — ​ — 4 ​ 324 Consumer ​ — ​ ​ — ​ 1 ​ ​ 10 Total loan term extended at a market rate 1 ​ $ 299 9 ​ $ 760 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ ​ Construction and Land Development ​ — ​ $ — ​ 1 ​ $ 34 Commercial & Industrial 1 ​ 143 2 ​ 358 Residential 1-4 Family - Commercial ​ 1 ​ ​ 290 ​ 1 ​ ​ 290 Residential 1-4 Family - Consumer 4 ​ ​ 423 17 ​ ​ 2,387 Residential 1-4 Family - Revolving — ​ — 1 ​ 52 Total loan term extended at a below market rate 6 ​ $ 856 22 ​ $ 3,121 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate modification, below market rate ​ ​ Total interest only at below market rate of interest — ​ $ — — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total 8 ​ $ 1,807 33 ​ $ 4,805 The following table shows, by class and modification type, TDRs that occurred during the three and nine months ended September 30, 20 19 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended September 30, 2019 ​ Nine Months Ended September 30, 2019 ​ ​ Recorded ​ Recorded ​ ​ No. of ​ Investment at ​ No. of ​ Investment at ​ ​ Loans ​ Period End ​ Loans ​ Period End Modified to interest only, at a market rate ​ ​ Total interest only at market rate of interest — ​ $ — — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, at a market rate ​ ​ Commercial & Industrial ​ 1 ​ $ 376 1 ​ $ 376 Residential 1-4 Family - Commercial — ​ ​ — 1 ​ ​ 73 Residential 1-4 Family - Consumer 1 ​ 461 4 ​ 761 Consumer 2 ​ 18 3 ​ 26 Total loan term extended at a market rate 4 ​ $ 855 9 ​ $ 1,236 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ ​ Construction and Land Development ​ 2 ​ $ 164 ​ 2 ​ $ 164 Residential 1-4 Family - Consumer 5 ​ ​ 883 17 ​ ​ 2,211 Consumer ​ — ​ ​ — ​ 1 ​ ​ 5 Total loan term extended at a below market rate 7 ​ $ 1,047 20 ​ $ 2,380 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total 11 ​ $ 1,902 29 ​ $ 3,616 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Allowance for Loan Loss Activity, by Portfolio Segment, Balances for Allowance for Credit Losses, and Loans Based on Impairment Methodology	The following tables show the ALLL activity by segment for the three and nine months ended September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2020 ​ Nine Months Ended September 30, 2020 ​ ​ Commercial ​ Consumer ​ Total ​ Commercial ​ Consumer ​ Total Balance at beginning of period ​ $ 111,954 ​ $ 58,023 ​ $ 169,977 ​ $ 30,941 ​ $ 11,353 ​ $ 42,294 Impact of ASC 326 adoption on non-PCD loans ​ — ​ — ​ — ​ 4,432 ​ 40,666 ​ 45,098 Impact of ASC 326 adoption on PCD loans ​ — ​ — ​ — ​ 1,752 ​ 634 ​ 2,386 Impact of adopting ASC 326 ​ — ​ — ​ — ​ 6,184 ​ 41,300 ​ 47,484 Loans charged-off ​ (995) ​ (1,983) ​ (2,978) ​ (5,553) ​ (9,253) ​ (14,806) Recoveries credited to allowance ​ 718 ​ 848 ​ 1,566 ​ 2,580 ​ 2,557 ​ 5,137 Provision charged to operations ​ 14,978 ​ (9,421) ​ 5,557 ​ 92,503 ​ 1,510 ​ 94,013 Balance at end of period ​ $ 126,655 ​ $ 47,467 ​ $ 174,122 ​ $ 126,655 ​ $ 47,467 ​ $ 174,122 The following table shows the ALLL activity by class for the nine months ended September 30, 2019. The table below includes the provision for loan losses. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, 2019 ​ ​ Allowance for loan losses ​ Balance, Recoveries Loans Provision Balance, ​ ​ beginning of ​ credited to ​ charged ​ charged to ​ end of ​ ​ the year ​ allowance ​ off ​ operations ​ period Construction and Land Development ​ $ 6,803 ​ $ 269 ​ $ (4,028) ​ $ 2,863 ​ $ 5,907 Commercial Real Estate - Owner Occupied ​ 4,023 ​ 118 ​ (483) ​ 361 ​ 4,019 Commercial Real Estate - Non-Owner Occupied ​ 8,865 ​ 95 ​ (270) ​ 996 ​ 9,686 Multifamily Real Estate ​ 649 ​ 85 ​ — ​ 46 ​ 780 Commercial & Industrial ​ 7,636 ​ 936 ​ (2,162) ​ 2,739 ​ 9,149 Residential 1-4 Family - Commercial ​ 1,692 ​ 244 ​ (397) ​ 50 ​ 1,589 Residential 1-4 Family - Consumer ​ 1,492 ​ 256 ​ (108) ​ 158 ​ 1,798 Residential 1-4 Family - Revolving ​ 1,297 ​ 589 ​ (570) ​ (179) ​ 1,137 Auto ​ 1,443 ​ 452 ​ (957) ​ 614 ​ 1,552 Consumer and all other (1) ​ 7,145 ​ 1,896 ​ (12,215) ​ 11,377 ​ 8,203 Total ​ $ 41,045 ​ $ 4,940 ​ $ (21,190) ​ $ 19,025 ​ $ 43,820 (1) Consumer and Other Commercial are grouped together as Consumer and all other for reporting purposes. ​ The following tables show the loan and ALLL balances based on impairment methodology by class as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Loans individually ​ Loans collectively ​ Loans acquired with ​ ​ ​ ​ ​ ​ ​ ​ evaluated for ​ evaluated for ​ deteriorated credit ​ ​ ​ ​ ​ ​ ​ ​ impairment ​ impairment ​ quality ​ Total ​ Loans ALL Loans ALL Loans ALL Loans ALL Construction and Land Development ​ $ 6,861 ​ $ 49 ​ $ 1,233,119 ​ $ 5,709 ​ $ 10,944 ​ $ — ​ $ 1,250,924 ​ $ 5,758 Commercial Real Estate - Owner Occupied ​ 11,621 ​ 146 ​ 2,002,184 ​ 3,773 ​ 27,438 ​ — ​ 2,041,243 ​ 3,919 Commercial Real Estate - Non-Owner Occupied ​ 3,845 ​ 2 ​ 3,267,688 ​ 9,541 ​ 14,565 ​ — ​ 3,286,098 ​ 9,543 Multifamily Real Estate ​ — ​ — ​ 633,649 ​ 632 ​ 94 ​ — ​ 633,743 ​ 632 Commercial & Industrial ​ 6,236 ​ 619 ​ 2,106,218 ​ 7,768 ​ 1,579 ​ 217 ​ 2,114,033 ​ 8,604 Residential 1-4 Family - Commercial ​ 5,773 ​ 162 ​ 706,359 ​ 1,203 ​ 12,205 ​ — ​ 724,337 ​ 1,365 Residential 1-4 Family - Consumer ​ 20,446 ​ 1,242 ​ 855,344 ​ 771 ​ 14,713 ​ — ​ 890,503 ​ 2,013 Residential 1-4 Family - Revolving ​ 3,048 ​ 510 ​ 652,329 ​ 813 ​ 4,127 ​ — ​ 659,504 ​ 1,323 Auto ​ 563 ​ 221 ​ 349,852 ​ 1,232 ​ 4 ​ — ​ 350,419 ​ 1,453 Consumer and all other (1) ​ 730 ​ 76 ​ 658,390 ​ 7,608 ​ 1,012 ​ — ​ 660,132 ​ 7,684 Total loans held for investment, net ​ $ 59,123 ​ $ 3,027 ​ $ 12,465,132 ​ $ 39,050 ​ $ 86,681 ​ $ 217 ​ $ 12,610,936 ​ $ 42,294 (1) Consumer and Other Commercial are grouped together as Consumer and all other for reporting purposes.
Loans Receivables Related Risk Rating	The following table shows the recorded investment in all loans, excluding PCI loans, by segment with their related risk level as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Watch & Special Mention Substandard Doubtful Total Construction and Land Development ​ $ 1,197,066 ​ $ 37,182 ​ $ 5,732 ​ $ — ​ $ 1,239,980 Commercial Real Estate - Owner Occupied ​ 1,916,492 ​ 87,004 ​ 10,309 ​ — ​ 2,013,805 Commercial Real Estate - Non-Owner Occupied ​ 3,205,463 ​ 62,368 ​ 3,608 ​ 94 ​ 3,271,533 Multifamily Real Estate ​ 613,844 ​ 19,396 ​ 409 ​ — ​ 633,649 Commercial & Industrial ​ 2,043,903 ​ 60,495 ​ 8,048 ​ 8 ​ 2,112,454 Residential 1-4 Family - Commercial ​ 680,894 ​ 24,864 ​ 6,374 ​ — ​ 712,132 Residential 1-4 Family - Consumer ​ 841,408 ​ 13,592 ​ 20,534 ​ 256 ​ 875,790 Residential 1-4 Family - Revolving ​ 641,069 ​ 6,373 ​ 7,935 ​ — ​ 655,377 Auto ​ 345,960 ​ 2,630 ​ 1,825 ​ — ​ 350,415 Consumer ​ 371,315 ​ 550 ​ 320 ​ — ​ 372,185 Other Commercial ​ 284,914 ​ 1,863 ​ 158 ​ — ​ 286,935 Total ​ $ 12,142,328 ​ $ 316,317 ​ $ 65,252 ​ $ 358 ​ $ 12,524,255
Schedule of Acquired Loan Portfolio and Accretable Yield	The following shows changes in the accretable yield for loans accounted for under ASC 310-30, Receivables – Loans and Debt Securities Acquired with Deteriorated Credit Quality, as of September 30, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ For the Nine Months Ended September 30, ​ 2019 Balance at beginning of period ​ $ 31,201 Additions ​ 2,432 Accretion ​ (9,830) Reclass of nonaccretable difference due to improvement in expected cash flows ​ 1,372 Measurement period adjustment ​ 2,629 Other, net (1) ​ 5,083 Balance at end of period ​ $ 32,887 (1) This line item represents changes in the cash flows expected to be collected due to the impact of non-credit changes such as prepayment assumptions, changes in interest rates on variable rate PCI loans, and discounted payoffs that occurred in the quarter.
Purchased Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Summary of Aging of the Loan Portfolio by Class	The following table shows the PCI loan portfolios, by class and their delinquency status, at December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-89 Days Greater than ​ ​ ​ ​ ​ ​ Past Due ​ 90 Days ​ Current ​ Total Construction and Land Development ​ $ 136 ​ $ 343 ​ $ 10,465 ​ $ 10,944 Commercial Real Estate - Owner Occupied ​ 480 ​ 6,884 ​ 20,074 ​ 27,438 Commercial Real Estate - Non-Owner Occupied ​ 848 ​ 987 ​ 12,730 ​ 14,565 Multifamily Real Estate ​ — ​ — ​ 94 ​ 94 Commercial & Industrial ​ — ​ 989 ​ 590 ​ 1,579 Residential 1-4 Family - Commercial ​ 543 ​ 1,995 ​ 9,667 ​ 12,205 Residential 1-4 Family - Consumer ​ 927 ​ 1,781 ​ 12,005 ​ 14,713 Residential 1-4 Family - Revolving ​ 287 ​ 205 ​ 3,635 ​ 4,127 Auto ​ ​ — ​ ​ — ​ ​ 4 ​ ​ 4 Consumer ​ ​ — ​ ​ 9 ​ ​ 659 ​ ​ 668 Other Commercial ​ — ​ — ​ 344 ​ 344 Total ​ $ 3,221 ​ $ 13,193 ​ $ 70,267 ​ $ 86,681
Loans Receivables Related Risk Rating	The following table shows the recorded investment in only PCI loans by segment with their related risk level as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Watch & Special Mention Substandard Doubtful Total Construction and Land Development ​ $ 1,092 ​ $ 3,692 ​ $ 6,160 ​ $ — ​ $ 10,944 Commercial Real Estate - Owner Occupied ​ 8,264 ​ 10,524 ​ 8,650 ​ — ​ 27,438 Commercial Real Estate - Non-Owner Occupied ​ 3,826 ​ 9,415 ​ 1,324 ​ — ​ 14,565 Multifamily Real Estate ​ — ​ 94 ​ — ​ — ​ 94 Commercial & Industrial ​ 127 ​ 25 ​ 1,427 ​ — ​ 1,579 Residential 1-4 Family - Commercial ​ 6,000 ​ 2,693 ​ 3,512 ​ — ​ 12,205 Residential 1-4 Family - Consumer ​ 9,947 ​ 557 ​ 4,209 ​ — ​ 14,713 Residential 1-4 Family - Revolving ​ 2,887 ​ 707 ​ 533 ​ — ​ 4,127 Auto ​ ​ 2 ​ ​ — ​ ​ 2 ​ ​ — ​ ​ 4 Consumer ​ 657 ​ — ​ 11 ​ — ​ 668 Other Commercial ​ ​ 120 ​ ​ 224 ​ ​ — ​ ​ — ​ ​ 344 Total ​ $ 32,922 ​ $ 27,931 ​ $ 25,828 ​ $ — ​ $ 86,681
Commercial Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivables Related Risk Rating	The table below details the amortized cost of the classes of loans within the Commercial segment by risk level and year of origination as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total Construction and Land Development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 236,949 ​ $ 346,840 ​ $ 304,768 ​ $ 41,015 ​ $ 42,268 ​ $ 63,632 ​ $ 29,674 ​ $ 1,065,146 Watch & Special Mention ​ ​ 2,268 ​ ​ 67,572 ​ ​ 40,714 ​ ​ 347 ​ ​ 5,863 ​ ​ 16,549 ​ ​ 1,645 ​ ​ 134,958 Substandard ​ ​ — ​ ​ — ​ ​ 368 ​ ​ 710 ​ ​ 2,040 ​ ​ 3,968 ​ ​ — ​ ​ 7,086 Total Construction and Land Development ​ $ 239,217 ​ $ 414,412 ​ $ 345,850 ​ $ 42,072 ​ $ 50,171 ​ $ 84,149 ​ $ 31,319 ​ $ 1,207,190 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 226,090 ​ $ 369,661 ​ $ 304,296 ​ $ 243,299 ​ $ 143,786 ​ $ 616,113 ​ $ 23,577 ​ $ 1,926,822 Watch & Special Mention ​ ​ 2,002 ​ ​ 17,684 ​ ​ 23,479 ​ ​ 17,770 ​ ​ 31,406 ​ ​ 64,728 ​ ​ 2,599 ​ ​ 159,668 Substandard ​ ​ — ​ ​ 118 ​ ​ 1,099 ​ ​ 1,113 ​ ​ 1,039 ​ ​ 17,175 ​ ​ 299 ​ ​ 20,843 Total Commercial Real Estate - Owner Occupied ​ $ 228,092 ​ $ 387,463 ​ $ 328,874 ​ $ 262,182 ​ $ 176,231 ​ $ 698,016 ​ $ 26,475 ​ $ 2,107,333 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Non-Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 275,008 ​ $ 439,081 ​ $ 401,551 ​ $ 442,151 ​ $ 356,256 ​ $ 862,293 ​ $ 24,467 ​ $ 2,800,807 Watch & Special Mention ​ ​ 27,599 ​ ​ 104,352 ​ ​ 97,973 ​ ​ 71,618 ​ ​ 107,934 ​ ​ 259,591 ​ ​ 18,318 ​ ​ 687,385 Substandard ​ ​ — ​ ​ — ​ ​ 6,464 ​ ​ — ​ ​ 25 ​ ​ 3,248 ​ ​ — ​ ​ 9,737 Total Commercial Real Estate - Non-Owner Occupied ​ $ 302,607 ​ $ 543,433 ​ $ 505,988 ​ $ 513,769 ​ $ 464,215 ​ $ 1,125,132 ​ $ 42,785 ​ $ 3,497,929 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial & Industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,979,209 ​ $ 401,385 ​ $ 221,417 ​ $ 79,734 ​ $ 76,145 ​ $ 149,692 ​ $ 524,960 ​ $ 3,432,542 Watch & Special Mention ​ ​ 5,081 ​ ​ 29,405 ​ ​ 16,889 ​ ​ 4,163 ​ ​ 5,170 ​ ​ 6,443 ​ ​ 28,156 ​ ​ 95,307 Substandard ​ ​ 37 ​ ​ 928 ​ ​ 396 ​ ​ 129 ​ ​ 623 ​ ​ 2,710 ​ ​ 3,577 ​ ​ 8,400 Total Commercial & Industrial ​ $ 1,984,327 ​ $ 431,718 ​ $ 238,702 ​ $ 84,026 ​ $ 81,938 ​ $ 158,845 ​ $ 556,693 ​ $ 3,536,249 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multifamily Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 131,434 ​ $ 80,234 ​ $ 69,881 ​ $ 120,758 ​ $ 70,127 ​ $ 239,525 ​ $ 2,499 ​ $ 714,458 Watch & Special Mention ​ ​ 2,283 ​ ​ 1,018 ​ ​ 4,894 ​ ​ 2,490 ​ ​ 621 ​ ​ 5,427 ​ ​ — ​ ​ 16,733 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 391 ​ ​ — ​ ​ 391 Total Multifamily Real Estate ​ $ 133,717 ​ $ 81,252 ​ $ 74,775 ​ $ 123,248 ​ $ 70,748 ​ $ 245,343 ​ $ 2,499 ​ $ 731,582 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 78,631 ​ $ 100,919 ​ $ 76,284 ​ $ 87,277 ​ $ 76,710 ​ $ 226,118 ​ $ 1,251 ​ $ 647,190 Watch & Special Mention ​ ​ 592 ​ ​ 4,625 ​ ​ 8,739 ​ ​ 4,420 ​ ​ 4,186 ​ ​ 15,798 ​ ​ — ​ ​ 38,360 Substandard ​ ​ 652 ​ ​ 810 ​ ​ 272 ​ ​ 2,060 ​ ​ 993 ​ ​ 6,119 ​ ​ 488 ​ ​ 11,394 Total Residential 1-4 Family - Commercial ​ $ 79,875 ​ $ 106,354 ​ $ 85,295 ​ $ 93,757 ​ $ 81,889 ​ $ 248,035 ​ $ 1,739 ​ $ 696,944 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 221,801 ​ $ 115,346 ​ $ 9,972 ​ $ 39,542 ​ $ 16,602 ​ $ 47,858 ​ $ 31,730 ​ $ 482,851 Watch & Special Mention ​ ​ 22 ​ ​ — ​ ​ 621 ​ ​ 1,312 ​ ​ 927 ​ ​ 8,351 ​ ​ — ​ ​ 11,233 Total Other Commercial ​ $ 221,823 ​ $ 115,346 ​ $ 10,593 ​ $ 40,854 ​ $ 17,529 ​ $ 56,209 ​ $ 31,730 ​ $ 494,084 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 3,149,122 ​ $ 1,853,466 ​ $ 1,388,169 ​ $ 1,053,776 ​ $ 781,894 ​ $ 2,205,231 ​ $ 638,158 ​ $ 11,069,816 Watch & Special Mention (1) ​ ​ 39,847 ​ ​ 224,656 ​ ​ 193,309 ​ ​ 102,120 ​ ​ 156,107 ​ ​ 376,887 ​ ​ 50,718 ​ ​ 1,143,644 Substandard ​ ​ 689 ​ ​ 1,856 ​ ​ 8,599 ​ ​ 4,012 ​ ​ 4,720 ​ ​ 33,611 ​ ​ 4,364 ​ ​ 57,851 Total Commercial ​ $ 3,189,658 ​ $ 2,079,978 ​ $ 1,590,077 ​ $ 1,159,908 ​ $ 942,721 ​ $ 2,615,729 ​ $ 693,240 ​ $ 12,271,311
Consumer Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivables Related Risk Rating	For Consumer loans, the Company evaluates credit quality based on the delinquency status of the loan. The following table details the amortized cost of the classes of loans within the Consumer segment based on their delinquency status and year of origination as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total Residential 1-4 Family - Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 143,716 ​ $ 83,309 ​ $ 78,957 ​ $ 77,910 ​ $ 111,043 ​ $ 311,108 ​ $ 12 ​ $ 806,055 30-59 Days Past Due ​ ​ — ​ ​ 156 ​ ​ 1,648 ​ ​ 43 ​ ​ 263 ​ ​ 888 ​ ​ — ​ ​ 2,998 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ 708 ​ ​ 1,138 ​ ​ 67 ​ ​ 2,063 ​ ​ — ​ ​ 3,976 90+ Days Past Due ​ ​ 646 ​ ​ 1,574 ​ ​ — ​ ​ 313 ​ ​ 388 ​ ​ 1,574 ​ ​ — ​ ​ 4,495 Nonaccrual ​ ​ — ​ ​ — ​ ​ 708 ​ ​ 870 ​ ​ 774 ​ ​ 10,268 ​ ​ — ​ ​ 12,620 Total Residential 1-4 Family - Consumer ​ $ 144,362 ​ $ 85,039 ​ $ 82,021 ​ $ 80,274 ​ $ 112,535 ​ $ 325,901 ​ $ 12 ​ $ 830,144 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 11,456 ​ $ 4,160 ​ $ 2,019 ​ $ — ​ $ — ​ $ 644 ​ $ 590,291 ​ $ 608,570 30-59 Days Past Due ​ ​ — ​ ​ 36 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,633 ​ ​ 2,669 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,141 ​ ​ 1,141 90+ Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,276 ​ ​ 2,276 Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 314 ​ ​ 3,350 ​ ​ 3,664 Total Residential 1-4 Family - Revolving ​ $ 11,456 ​ $ 4,196 ​ $ 2,019 ​ $ — ​ $ — ​ $ 958 ​ $ 599,691 ​ $ 618,320 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 26,520 ​ $ 79,119 ​ $ 79,878 ​ $ 25,836 ​ $ 11,163 ​ $ 18,017 ​ $ 33,296 ​ $ 273,829 30-59 Days Past Due ​ ​ 37 ​ ​ 261 ​ ​ 444 ​ ​ 87 ​ ​ 24 ​ ​ 41 ​ ​ 126 ​ ​ 1,020 60-89 Days Past Due ​ ​ 38 ​ ​ 126 ​ ​ 273 ​ ​ 20 ​ ​ 25 ​ ​ 186 ​ ​ 104 ​ ​ 772 90+ Days Past Due ​ ​ — ​ ​ 19 ​ ​ 253 ​ ​ 32 ​ ​ 21 ​ ​ — ​ ​ 2 ​ ​ 327 Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ 74 ​ ​ — ​ ​ 75 Total Consumer ​ $ 26,595 ​ $ 79,525 ​ $ 80,848 ​ $ 25,975 ​ $ 11,234 ​ $ 18,318 ​ $ 33,528 ​ $ 276,023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Auto ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 129,176 ​ $ 126,243 ​ $ 62,569 ​ $ 37,390 ​ $ 20,505 ​ $ 8,736 ​ $ — ​ $ 384,619 30-59 Days Past Due ​ ​ 145 ​ ​ 490 ​ ​ 265 ​ ​ 288 ​ ​ 195 ​ ​ 130 ​ ​ — ​ ​ 1,513 60-89 Days Past Due ​ ​ 39 ​ ​ 132 ​ ​ 118 ​ ​ 116 ​ ​ 26 ​ ​ 22 ​ ​ — ​ ​ 453 90+ Days Past Due ​ ​ 29 ​ ​ 99 ​ ​ 62 ​ ​ 45 ​ ​ 53 ​ ​ 27 ​ ​ — ​ ​ 315 Nonaccrual ​ ​ 33 ​ ​ 128 ​ ​ 61 ​ ​ 107 ​ ​ 111 ​ ​ 77 ​ ​ — ​ ​ 517 Total Auto ​ $ 129,422 ​ $ 127,092 ​ $ 63,075 ​ $ 37,946 ​ $ 20,890 ​ $ 8,992 ​ $ — ​ $ 387,417 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 310,868 ​ $ 292,831 ​ $ 223,423 ​ $ 141,136 ​ $ 142,711 ​ $ 338,505 ​ $ 623,599 ​ $ 2,073,073 30-59 Days Past Due ​ ​ 182 ​ ​ 943 ​ ​ 2,357 ​ ​ 418 ​ ​ 482 ​ ​ 1,059 ​ ​ 2,759 ​ ​ 8,200 60-89 Days Past Due ​ ​ 77 ​ ​ 258 ​ ​ 1,099 ​ ​ 1,274 ​ ​ 118 ​ ​ 2,271 ​ ​ 1,245 ​ ​ 6,342 90+ Days Past Due ​ ​ 675 ​ ​ 1,692 ​ ​ 315 ​ ​ 390 ​ ​ 462 ​ ​ 1,601 ​ ​ 2,278 ​ ​ 7,413 Nonaccrual ​ ​ 33 ​ ​ 128 ​ ​ 769 ​ ​ 977 ​ ​ 886 ​ ​ 10,733 ​ ​ 3,350 ​ ​ 16,876 Total Consumer ​ $ 311,835 ​ $ 295,852 ​ $ 227,963 ​ $ 144,195 ​ $ 144,659 ​ $ 354,169 ​ $ 633,231 ​ $ 2,111,904

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated Remaining Amortization Expense of Intangibles	As of September 30, 2020, the estimated remaining amortization expense of intangibles is as follows for the years ending (dollars in thousands): ​ ​ ​ ​ For the remaining three months of 2020 $ 3,883 2021 ​ ​ 13,874 2022 ​ ​ 11,490 2023 ​ ​ 9,687 2024 ​ ​ 7,819 Thereafter ​ ​ 14,315 Total estimated amortization expense ​ $ 61,068

LEASES (Tables)

LEASES (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Lessee Lease Portfolio and Other Supplemental Lease Information	The tables below provide information about the Company’s lessee lease portfolio and other supplemental lease information (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ December 31, 2019 ​ ​ Operating ​ ​ Finance ​ ​ ​ Operating Right-of-use-assets ​ $ 53,948 ​ ​ $ 7,654 ​ ​ $ 54,941 ​ Lease liabilities ​ ​ 64,757 ​ ​ ​ 10,590 ​ ​ ​ 66,052 ​ Lease Term and Discount Rate of Operating leases: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average remaining lease term (years) ​ 7.41 ​ ​ ​ 8.33 ​ ​ ​ 7.36 ​ Weighted-average discount rate (1) ​ 2.26 % ​ ​ 1.17 % ​ ​ 2.69 % (1) An incremental borrowing rate is used based on information available at commencement date of lease or at remeasurement date.
Other Lease Information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, ​ 2020 ​ 2019 Cash paid for amounts included in measurement of lease liabilities: ​ ​ ​ ​ ​ ​ Operating Cash Flows from Finance Leases ​ $ 41 ​ $ - Operating Cash Flows from Operating Leases ​ 10,398 ​ ​ 10,327 Right-of-use assets obtained in exchange for lease obligations: ​ ​ ​ ​ ​ Operating leases ​ 7,566 ​ ​ 5,979 Finance leases ​ ​ 10,549 ​ ​ -
Lease Cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, ​ Nine months ended September 30, ​ ​ ​ 2020 ​ ​ 2019 ​ ​ 2020 ​ ​ 2019 Net Operating Lease Cost ​ $ 2,536 ​ $ 2,928 ​ $ 8,383 ​ $ 8,940 Finance Lease Cost: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of right-of-use assets ​ ​ 230 ​ ​ - ​ ​ 306 ​ ​ - Interest on lease liabilities ​ ​ 31 ​ ​ - ​ ​ 41 ​ ​ - Total Lease Cost ​ $ 2,797 ​ $ 2,928 ​ $ 8,730 ​ $ 8,940
Maturities of Lessor and Lessee Arrangements Outstanding	The maturities of lessor and lessee arrangements outstanding at September 30, 2020 are presented in the tables below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ Lessor ​ Lessee ​ ​ ​ Sales-type and Direct Financing ​ Operating ​ Finance For the remaining three months of 2020 $ 7,416 ​ $ 3,193 ​ $ — 2021 ​ 28,883 ​ ​ 12,500 ​ ​ 1,261 2022 ​ 29,799 ​ ​ 11,289 ​ ​ 1,292 2023 ​ 28,136 ​ ​ 10,324 ​ ​ 1,325 2024 ​ 26,185 ​ ​ 9,007 ​ ​ 1,358 2025 ​ ​ 17,780 ​ ​ 6,712 ​ ​ 1,392 Thereafter ​ 13,594 ​ ​ 17,701 ​ ​ 4,515 Total undiscounted cash flows ​ 151,793 ​ ​ 70,726 ​ ​ 11,143 Less: Adjustments (1) ​ 9,645 ​ ​ 5,969 ​ ​ 553 Total (2) ​ $ 142,148 ​ $ 64,757 ​ $ 10,590 (1) Lessor – unearned income and unearned guaranteed residual value; Lessee – imputed interest. (2) Represents lease receivables for lessor arrangements and lease liabilities for lessee arrangements

BORROWINGS (Tables)

BORROWINGS (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Short-Term Borrowings	Total short-term borrowings consist of the following as of September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ ​ 2020 ​ 2019 Securities sold under agreements to repurchase ​ $ 91,086 ​ $ 66,053 ​ Federal Funds Purchased ​ ​ 25,000 ​ ​ — ​ FHLB Advances ​ 150,200 ​ 370,200 ​ Total short-term borrowings ​ $ 266,286 ​ $ 436,253 ​ ​ ​ ​ ​ ​ ​ ​ ​ Average outstanding balance during the period ​ $ 223,068 ​ $ 673,116 ​ Average interest rate (during the period) ​ 0.96 % 2.30 % Average interest rate at end of period ​ 0.25 % 1.52 %
Long-Term Borrowings	Total long-term borrowings consist of the following as of September 30, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ ​ ​ ​ Principal ​ 3-Month LIBOR ​ Rate (1) ​ Maturity ​ Investment (2) Trust Preferred Capital Securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust Preferred Capital Note - Statutory Trust I ​ $ 22,500 2.75 % 2.98 % 6/17/2034 ​ $ 696 Trust Preferred Capital Note - Statutory Trust II ​ 36,000 1.40 % 1.63 % 6/15/2036 ​ 1,114 VFG Limited Liability Trust I Indenture ​ 20,000 2.73 % 2.96 % 3/18/2034 ​ 619 FNB Statutory Trust II Indenture ​ 12,000 3.10 % 3.33 % 6/26/2033 ​ 372 Gateway Capital Statutory Trust I ​ 8,000 3.10 % 3.33 % 9/17/2033 ​ 248 Gateway Capital Statutory Trust II ​ 7,000 2.65 % 2.88 % 6/17/2034 ​ 217 Gateway Capital Statutory Trust III ​ 15,000 1.50 % 1.73 % 5/30/2036 ​ 464 Gateway Capital Statutory Trust IV ​ 25,000 1.55 % 1.78 % 7/30/2037 ​ 774 MFC Capital Trust II ​ 5,000 2.85 % 3.08 % 1/23/2034 ​ 155 Total Trust Preferred Capital Securities ​ $ 150,500 ​ $ 4,659 FHLB Advances (3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Convertible Flipper ​ $ 50,000 ​ - % 0.85 % 8/17/2029 ​ ​ ​ Convertible Flipper ​ ​ 150,000 ​ (0.75) % - % 5/22/2029 ​ ​ ​ Convertible Flipper ​ ​ 50,000 ​ (0.75) % - % 5/30/2029 ​ ​ ​ Convertible Flipper ​ ​ 100,000 ​ (0.75) % - % 6/21/2029 ​ ​ ​ Fixed Rate Convertible ​ ​ 200,000 ​ - % 1.78 % 10/26/2028 ​ ​ ​ Fixed Rate Credit ​ ​ 10,000 ​ - % 1.54 % 10/2/2020 ​ ​ ​ Total FHLB Advances ​ $ 560,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ Subordinated Debt (4)(5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2025 Subordinated Debt ​ $ 8,500 ​ - % 6.75 % 6/30/2025 ​ ​ ​ 2026 Subordinated Debt (6) ​ ​ 150,000 ​ - % 5.00 % 12/15/2026 ​ ​ ​ Total Subordinated Debt ​ $ 158,500 ​ ​ ​ ​ ​ ​ ​ ​ ​ PPPLF Advances (7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PPPLF Advance 4/8/2022 ​ $ 55,422 ​ - % 0.35 % 4/8/2022 ​ ​ ​ PPPLF Advance 4/11/2022 ​ ​ 134,523 ​ - % 0.35 % 4/11/2022 ​ ​ ​ Total PPPLF Advances ​ $ 189,945 ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Premium (Discount) (8) ​ ​ (15,568) ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment in Trust Preferred Capital Securities ​ ​ 4,659 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Long-term Borrowings ​ $ 1,048,036 ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Rate as of September 30, 2020. Calculated using non-rounded numbers. (2) The total of the trust preferred capital securities and investments in the respective trusts represents the principal asset of the Company’s junior subordinated debt securities with like maturities and like interest rates to the capital securities. The Company’s investment in the trusts is reported in "Other Assets" on the Company’s Consolidated Balance Sheets. (3) Convertible Flippers have interest rate floors of 0% . (4) The remaining issuance discount as of September 30, 2020 is $1.2 million. (5) Subordinated notes qualify as Tier 2 capital for the Company for regulatory purposes. (6) Fixed-to-floating rate notes. On December 15, 2021, the interest rate will change to a floating rate of LIBOR plus 3.175% through its maturity date. (7) The Company’s available borrowing capacity under the PPPLF as of September 30, 2020 was $1.4 billion. (8) Includes discount on issued subordinated notes. ​ ​ ​ ​ Total long-term borrowings consist of the following as of December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ ​ ​ ​ Principal ​ 3-Month LIBOR ​ Rate (1) ​ Maturity ​ Investment (2) Trust Preferred Capital Securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust Preferred Capital Note - Statutory Trust I ​ $ 22,500 2.75 % 4.66 % 6/17/2034 ​ $ 696 Trust Preferred Capital Note - Statutory Trust II ​ 36,000 1.40 % 3.31 % 6/15/2036 ​ 1,114 VFG Limited Liability Trust I Indenture ​ 20,000 2.73 % 4.64 % 3/18/2034 ​ 619 FNB Statutory Trust II Indenture ​ 12,000 3.10 % 5.01 % 6/26/2033 ​ 372 Gateway Capital Statutory Trust I ​ 8,000 3.10 % 5.01 % 9/17/2033 ​ 248 Gateway Capital Statutory Trust II ​ 7,000 2.65 % 4.56 % 6/17/2034 ​ 217 Gateway Capital Statutory Trust III ​ 15,000 1.50 % 3.41 % 5/30/2036 ​ 464 Gateway Capital Statutory Trust IV ​ 25,000 1.55 % 3.46 % 7/30/2037 ​ 774 MFC Capital Trust II ​ 5,000 2.85 % 4.76 % 1/23/2034 ​ 155 Total Trust Preferred Capital Securities ​ $ 150,500 ​ $ 4,659 FHLB Advances (3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Convertible Flipper ​ $ 50,000 ​ (0.75) % 1.16 % 8/17/2029 ​ ​ ​ Convertible Flipper ​ ​ 200,000 ​ (0.50) % 1.41 % 5/15/2024 ​ ​ ​ Convertible Flipper ​ ​ 150,000 ​ (0.75) % 1.16 % 5/22/2029 ​ ​ ​ Convertible Flipper ​ ​ 50,000 ​ (0.75) ​ 1.16 ​ 5/30/2029 ​ ​ ​ Convertible Flipper ​ ​ 100,000 ​ (0.75) % 1.16 % 6/21/2029 ​ ​ ​ Fixed Rate Convertible ​ ​ 200,000 ​ - % 1.78 % 10/26/2028 ​ ​ ​ Fixed Rate Hybrid ​ ​ 20,000 ​ - % 1.58 % 5/18/2020 ​ ​ ​ Fixed Rate Credit ​ ​ 10,000 ​ - % 1.54 % 10/2/2020 ​ ​ ​ Total FHLB Advances ​ $ 780,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ Subordinated Debt (4)(5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2025 Subordinated Debt ​ $ 8,500 ​ - % 6.75 % 6/30/2025 ​ ​ ​ 2026 Subordinated Debt (6) ​ ​ 150,000 ​ - % 5.00 % 12/15/2026 ​ ​ ​ Total Subordinated Debt ​ $ 158,500 ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Premium (Discount) (7) ​ ​ (16,164) ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment in Trust Preferred Capital Securities ​ ​ 4,659 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Long-term Borrowings ​ $ 1,077,495 ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Rate as of December 31, 2019. Calculated using non-rounded numbers. (2) The total of the trust preferred capital securities and investments in the respective trusts represents the principal asset of the Company’s junior subordinated debt securities with like maturities and like interest rates to the capital securities. The Company’s investment in the trusts is reported in "Other Assets" on the Company’s Consolidated Balance Sheets. (3) Convertible Flippers have interest rate floors of 0% . (4) The remaining issuance discount as of December 31, 2019 is $1.4 million. (5) Subordinated notes qualify as Tier 2 capital for the Company for regulatory purposes. (6) Fixed-to-floating rate notes. On December 15, 2021, the interest rate will change to a floating rate of LIBOR plus 3.175% through its maturity date. (7) Includes discount on issued subordinated notes.
Contractual Maturities of Long-Term Debt	As of September 30, 2020, the contractual maturities of long-term debt are as follows for the years ending (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust ​ ​ ​ ​ ​ ​ Preferred ​ ​ ​ Fair Value Total ​ Capital Subordinated PPPLF FHLB Premium Long-term ​ Notes Debt Advances Advances (Discount) (1) Borrowings For the remaining three months of 2020 ​ $ — ​ $ — ​ $ — ​ $ 10,000 ​ $ (238) ​ $ 9,762 2021 ​ — ​ — ​ ​ — ​ — ​ (1,008) ​ (1,008) 2022 ​ — ​ — ​ ​ 189,945 ​ — ​ (1,030) ​ 188,915 2023 ​ — ​ — ​ ​ — ​ — ​ (1,053) ​ (1,053) 2024 ​ — ​ — ​ ​ — ​ — ​ (1,078) ​ (1,078) Thereafter ​ 155,159 ​ 158,500 ​ ​ — ​ 550,000 ​ (11,161) ​ 852,498 Total long-term borrowings ​ $ 155,159 ​ $ 158,500 ​ $ 189,945 ​ $ 560,000 ​ $ (15,568) ​ $ 1,048,036 ​ (1) Includes discount on issued subordinated notes.

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Balances of Commitments and Contingencies	The following table presents the balances of commitments and contingencies (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 December 31, 2019 Commitments with off-balance sheet risk: ​ ​ Commitments to extend credit (1) ​ $ 4,631,361 ​ $ 4,691,272 Letters of credit ​ 164,303 ​ 209,658 Total commitments with off-balance sheet risk ​ $ 4,795,664 ​ $ 4,900,930 (1) Includes unfunded overdraft protection. ​ ​ ​ ​ ​ ​
Schedule of Pledged Assets, Not Separately Reported on Statement of Financial Position	As part of the Company’s liquidity management strategy, it pledges collateral to secure various financing and other activities that occur during the normal course of business. The following tables present the types of collateral pledged, at September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pledged Assets as of September 30, 2020 ​ ​ ​ ​ ​ ​ AFS HTM ​ ​ ​ ​ ​ ​ Cash ​ Securities (1) ​ Securities (1) ​ Loans (2) ​ Total Public deposits ​ $ — ​ $ 476,167 ​ $ 432,791 ​ $ — ​ $ 908,958 Repurchase agreements ​ — ​ 111,781 ​ — ​ — ​ 111,781 FHLB advances ​ — ​ 54,195 ​ — ​ 4,354,063 ​ 4,408,258 Derivatives ​ 276,786 ​ 939 ​ — ​ — ​ 277,725 Fed Funds ​ ​ — ​ ​ — ​ ​ — ​ ​ 316,561 ​ ​ 316,561 PPP Loans ​ ​ — ​ ​ — ​ ​ — ​ ​ 189,945 ​ ​ 189,945 Other purposes ​ — ​ ​ 124,517 ​ ​ 8,862 ​ ​ — ​ ​ 133,379 Total pledged assets ​ $ 276,786 ​ $ 767,599 ​ $ 441,653 ​ $ 4,860,569 ​ $ 6,346,607 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Balance represents market value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (2) Balance represents book value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pledged Assets as of December 31, 2019 ​ ​ ​ ​ ​ ​ AFS HTM ​ ​ ​ ​ ​ ​ Cash ​ Securities (1) ​ Securities (1) ​ Loans (2) ​ Total Public deposits ​ $ — ​ $ 467,266 ​ $ 292,096 ​ $ — ​ $ 759,362 Repurchase agreements ​ — ​ 79,299 ​ 7,602 ​ — ​ 86,901 FHLB advances ​ — ​ 63,812 ​ — ​ 3,846,934 ​ 3,910,746 Derivatives ​ 116,839 ​ 1,260 ​ — ​ — ​ 118,099 Fed Funds ​ ​ — ​ ​ — ​ ​ — ​ ​ 292,738 ​ ​ 292,738 Other purposes ​ — ​ 122,358 ​ 10,654 ​ — ​ 133,012 Total pledged assets ​ $ 116,839 ​ $ 733,995 ​ $ 310,352 ​ $ 4,139,672 ​ $ 5,300,858 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) Balance represents book value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (2) Balance represents market value. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

DERIVATIVES (Tables)

DERIVATIVES (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of the Derivatives	The following table summarizes key elements of the Company’s derivative instruments as of September 30, 2020 and December 31, 2019, segregated by derivatives that are considered accounting hedges and those that are not (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 December 31, 2019 ​ ​ ​ ​ ​ Derivative (2) ​ ​ ​ ​ Derivative (2) ​ Notional or ​ ​ ​ ​ Notional or ​ ​ ​ ​ ​ ​ Contractual ​ ​ ​ ​ ​ ​ ​ Contractual ​ ​ ​ ​ ​ ​ ​ ​ Amount (1) ​ Assets ​ Liabilities ​ Amount (1) ​ Assets ​ Liabilities Derivatives designated as accounting hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate contracts: ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flow hedges ​ $ — ​ $ — ​ $ — ​ $ 100,000 ​ $ — ​ $ 1,147 Fair value hedges ​ 125,856 ​ — ​ 13,912 ​ 133,078 ​ 182 ​ 6,256 Derivatives not designated as accounting hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loan Swaps : ​ ​ ​ ​ ​ ​ Pay fixed - receive floating interest rate swaps ​ 2,192,085 ​ — ​ 187,299 ​ 1,575,149 ​ 753 ​ 53,592 Pay floating - receive fixed interest rate swaps ​ 2,192,085 ​ 187,299 ​ — ​ 1,575,149 ​ 53,592 ​ 753 ​ (1) Notional amounts are not recorded on the Company’s Consolidated Balance Sheets and are generally used only as a basis on which interest and other payments are determined. (2) Balances represent fair value of derivative financial instruments.
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table summarizes the carrying value of the Company’s hedged assets in fair value hedges and the associated cumulative basis adjustments included in those carrying values as of September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ December 31, 2019 ​ ​ ​ Cumulative ​ Cumulative ​ ​ ​ ​ ​ Amount of Basis ​ ​ ​ Amount of Basis ​ ​ ​ ​ ​ Adjustments ​ ​ ​ Adjustments ​ ​ ​ ​ ​ Included in the ​ ​ ​ Included in the ​ ​ Carrying Amount ​ Carrying ​ Carrying Amount ​ Carrying ​ ​ of Hedged ​ Amount of the ​ of Hedged ​ Amount of the ​ ​ Assets/(Liabilities) ​ Hedged ​ Assets/(Liabilities) ​ Hedged ​ ​ Amount (1) Assets/(Liabilities) ​ Amount (1) Assets/(Liabilities) Line items on the Consolidated Balance Sheets in which the hedged item is included: ​ ​ ​ ​ Securities available-for-sale (1) (2) ​ $ 179,908 ​ $ 7,992 ​ $ 206,799 ​ $ 4,072 Loans ​ 75,856 ​ 5,830 ​ 83,078 ​ 1,972 ​ (1) These amounts include the amortized cost basis of the investment securities designated in hedging relationships for which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At September 30, 2020 and December 31, 2019, the amortized cost basis of this portfolio was $ 180 million and $ 207 million, respectively and the cumulative basis adjustment associated with this hedge was $8.0 million and $4.1 million, respectively. The amount of the designated hedged item was $50 million. (2) Carrying value represents amortized cost.

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Change in Accumulated Other Comprehensive Income	The change in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2020 is summarized as follows, net of tax (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gains ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) on ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ BOLI ​ Total Balance - June 30, 2020 ​ $ 63,886 ​ $ 65 ​ $ — ​ $ (2,647) ​ $ 61,304 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 1,250 ​ ​ — ​ ​ — ​ ​ — ​ 1,250 Amounts reclassified from AOCI into earnings ​ (14) ​ ​ (5) ​ ​ — ​ ​ 127 ​ 108 Net current period other comprehensive income (loss) ​ 1,236 ​ (5) ​ — ​ 127 ​ 1,358 Balance - September 30, 2020 ​ $ 65,122 ​ $ 60 ​ $ — ​ $ (2,520) ​ $ 62,662 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gains ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) on ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ BOLI ​ Total Balance - December 31, 2019 ​ $ 37,877 ​ $ 75 ​ $ (782) ​ $ (1,595) ​ $ 35,575 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 36,956 ​ ​ — ​ ​ (699) ​ ​ (1,289) ​ 34,968 Amounts reclassified from AOCI into earnings ​ (9,711) ​ ​ (15) ​ ​ 1,481 ​ ​ 364 ​ (7,881) Net current period other comprehensive income (loss) ​ 27,245 ​ (15) ​ 782 ​ (925) ​ 27,087 Balance - September 30, 2020 ​ $ 65,122 ​ $ 60 ​ $ — ​ $ (2,520) ​ $ 62,662 ​ ​ The change in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 is summarized as follows, net of tax (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gain ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ on BOLI ​ Total Balance - June 30, 2019 ​ $ 36,125 ​ $ 85 ​ $ (7,155) ​ $ (988) ​ $ 28,067 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 12,364 ​ ​ — ​ ​ 6,025 ​ ​ (647) ​ ​ 17,742 Amounts reclassified from AOCI into earnings ​ (5,612) ​ ​ (5) ​ ​ 158 ​ ​ 19 ​ ​ (5,440) Net current period other comprehensive income (loss) ​ 6,752 ​ (5) ​ 6,183 ​ (628) ​ 12,302 Balance - September 30, 2019 ​ $ 42,877 ​ $ 80 ​ $ (972) ​ $ (1,616) ​ $ 40,369 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gain ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Losses) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ for AFS ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ Gains (Losses) ​ Securities ​ Change in Fair ​ Gains ​ ​ ​ ​ ​ on AFS ​ Transferred to ​ Value of Cash ​ (Losses) ​ ​ ​ ​ ​ Securities ​ HTM ​ Flow Hedge ​ on BOLI ​ Total Balance - December 31, 2018 ​ $ (5,949) ​ $ 95 ​ $ (3,393) ​ $ (1,026) ​ $ (10,273) Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 54,598 ​ ​ — ​ ​ 1,970 ​ ​ (647) ​ ​ 55,921 Amounts reclassified from AOCI into earnings ​ (5,772) ​ ​ (15) ​ ​ 451 ​ ​ 57 ​ ​ (5,279) Net current period other comprehensive income (loss) ​ 48,826 ​ (15) ​ 2,421 ​ (590) ​ 50,642 Balance - September 30, 2019 ​ $ 42,877 ​ $ 80 ​ $ (972) ​ $ (1,616) ​ $ 40,369

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table presents the balances of financial assets and liabilities measured at fair value on a recurring basis at September 30, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at September 30, 2020 using ​ ​ ​ Significant ​ ​ ​ ​ ​ ​ Quoted Prices in ​ Other ​ Significant ​ ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ ​ ​ ​ ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ AFS securities: ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ — ​ $ 13,878 ​ $ — ​ $ 13,878 Obligations of states and political subdivisions ​ — ​ 796,856 ​ — ​ 796,856 Corporate and other bonds (1) ​ — ​ 148,918 ​ — ​ 148,918 Mortgage-backed securities ​ — ​ 1,482,067 ​ — ​ 1,482,067 Other securities ​ — ​ 1,621 ​ — ​ 1,621 Loans held for sale ​ — ​ 52,607 ​ — ​ 52,607 Derivatives: ​ ​ ​ ​ Interest rate swap ​ — ​ 187,299 ​ — ​ 187,299 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ Derivatives: ​ ​ ​ ​ Interest rate swap ​ $ — ​ $ 187,299 ​ $ — ​ $ 187,299 Fair value hedges ​ — ​ 13,912 ​ — ​ 13,912 (1) Other bonds include asset-backed securities. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2019 using ​ ​ ​ Significant ​ ​ ​ ​ ​ ​ Quoted Prices in ​ Other ​ Significant ​ ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ ​ ​ ​ ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ AFS securities: ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ — ​ $ 21,320 ​ $ — ​ $ 21,320 Obligations of states and political subdivisions ​ ​ — ​ ​ 447,091 ​ ​ — ​ ​ 447,091 Corporate and other bonds (1) ​ — ​ 135,959 ​ — ​ 135,959 Mortgage-backed securities ​ — ​ 1,337,996 ​ — ​ 1,337,996 Other securities ​ — ​ 3,079 ​ — ​ 3,079 Loans held for sale ​ ​ — ​ ​ 55,405 ​ ​ — ​ ​ 55,405 Derivatives: ​ ​ ​ ​ Interest rate swap ​ — ​ 54,345 ​ — ​ 54,345 Fair value hedges ​ — ​ 182 ​ — ​ 182 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ Derivatives: ​ ​ ​ ​ Interest rate swap ​ $ — ​ $ 54,345 ​ $ — ​ $ 54,345 Cash flow hedges ​ — ​ 1,147 ​ — ​ 1,147 Fair value hedges ​ — ​ 6,256 ​ — ​ 6,256 (1) Other bonds include asset-backed securities.
Carrying Values and Estimated Fair Values of the Company's Financial Instruments	The carrying values and estimated fair values of the Company’s financial instruments at September 30, 2020 and December 31, 2019 are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at September 30, 2020 using ​ ​ ​ Quoted Prices Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Observable ​ Unobservable ​ Total Fair ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ Value ​ ​ Carrying ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Value ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 520,966 ​ $ 520,966 ​ $ — ​ $ — ​ $ 520,966 AFS securities ​ 2,443,340 ​ — ​ 2,443,340 ​ — ​ 2,443,340 HTM securities ​ 546,661 ​ — ​ 600,679 ​ 13,494 ​ 614,173 Restricted stock ​ 112,216 ​ — ​ 112,216 ​ — ​ 112,216 Loans held for sale ​ 52,607 ​ — ​ 52,607 ​ — ​ 52,607 Net loans ​ 14,209,093 ​ — ​ — ​ 14,102,010 ​ 14,102,010 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 187,299 ​ — ​ 187,299 ​ — ​ 187,299 Accrued interest receivable ​ 71,475 ​ — ​ 71,475 ​ — ​ 71,475 BOLI ​ 325,538 ​ — ​ 325,538 ​ — ​ 325,538 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ ​ Deposits ​ $ 15,576,098 ​ $ — ​ $ 15,624,786 ​ $ — ​ $ 15,624,786 Borrowings ​ 1,314,322 ​ — ​ 1,279,838 ​ — ​ 1,279,838 Accrued interest payable ​ 5,126 ​ — ​ 5,126 ​ — ​ 5,126 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 187,299 ​ — ​ 187,299 ​ — ​ 187,299 Fair value hedges ​ 13,912 ​ — ​ 13,912 ​ — ​ 13,912 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2019 using ​ ​ ​ ​ ​ Quoted Prices ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Observable ​ Unobservable ​ Total Fair ​ ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs ​ Value ​ ​ Carrying ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Value ​ Level 1 ​ Level 2 ​ Level 3 ​ Balance ASSETS ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 436,032 ​ $ 436,032 ​ $ — ​ $ — ​ $ 436,032 AFS securities ​ 1,945,445 ​ — ​ 1,945,445 ​ — ​ 1,945,445 HTM securities ​ 555,144 ​ — ​ 585,820 ​ 17,683 ​ 603,503 Restricted stock ​ 130,848 ​ — ​ 130,848 ​ — ​ 130,848 Loans held for sale ​ ​ 55,405 ​ ​ — ​ 55,405 ​ — ​ ​ 55,405 Net loans ​ 12,568,642 ​ — ​ — ​ 12,449,505 ​ 12,449,505 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 54,345 ​ — ​ 54,345 ​ — ​ 54,345 Fair value hedges ​ 182 ​ — ​ 182 ​ — ​ 182 Accrued interest receivable ​ 52,721 ​ — ​ 52,721 ​ — ​ 52,721 BOLI ​ 322,917 ​ — ​ 322,917 ​ — ​ 322,917 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ ​ Deposits ​ $ 13,304,981 ​ $ — ​ $ 13,349,943 ​ $ — ​ $ 13,349,943 Borrowings ​ 1,513,748 ​ — ​ 1,479,606 ​ — ​ 1,479,606 Accrued interest payable ​ 6,108 ​ — ​ 6,108 ​ — ​ 6,108 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 54,345 ​ — ​ 54,345 ​ — ​ 54,345 Cash flow hedges ​ 1,147 ​ — ​ 1,147 ​ — ​ 1,147 Fair value hedges ​ 6,256 ​ — ​ 6,256 ​ — ​ 6,256

REVENUE (Tables)

REVENUE (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Noninterest income disaggregated by major source, for the three and nine months ended September 30, 2020 and 2019, consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ ​ September 30, ​ September 30, September 30, ​ September 30, ​ ​ 2020 ​ 2019 2020 ​ 2019 Noninterest income: ​ ​ ​ ​ ​ Deposit Service Charges (1) ​ ​ ​ ​ ​ Overdraft fees ​ $ 4,231 ​ $ 6,021 ​ $ 13,240 ​ $ 17,847 Maintenance fees & other ​ 1,810 ​ 1,654 ​ 5,309 ​ 4,484 Other service charges, commissions, and fees (1) ​ 1,621 ​ 1,513 ​ 4,600 ​ 4,879 Interchange fees (1) ​ 1,979 ​ 2,108 ​ 5,300 ​ 12,765 Fiduciary and asset management fees (1) ​ ​ ​ ​ ​ ​ ​ ​ Trust asset management fees ​ 2,729 ​ 2,661 ​ 8,026 ​ 5,977 Registered advisor management fees ​ 2,224 ​ 2,219 ​ 6,402 ​ 7,919 Brokerage management fees ​ 1,092 ​ 1,202 ​ 3,115 ​ 2,938 Mortgage banking income ​ 8,897 ​ 3,374 ​ 16,744 ​ 7,614 Gains on securities transactions ​ 18 ​ 7,104 ​ 12,293 ​ 7,306 Bank owned life insurance income ​ 3,421 ​ 2,062 ​ 7,498 ​ 6,191 Loan-related interest rate swap fees ​ 3,170 ​ 5,480 ​ 12,602 ​ 10,656 Other operating income (2)(3) ​ 3,215 ​ 12,708 ​ 4,116 ​ 15,045 Total noninterest income (4) ​ $ 34,407 ​ $ 48,106 ​ $ 99,245 ​ $ 103,621 (1) Income within scope of Topic 606. (2) Includes income within the scope of Topic 606 of $1.2 million and $ 343,000 for the three months ended September 30, 2020 and 2019, respectively, and $ 2.4 million and $ 2.2 million for the nine months ended September 30, 2020 and 2019, respectively. The remaining balance is outside the scope of Topic 606. (3) For the three and nine months ended September 30, 2019, the remaining balance outside the scope of Topic 606 includes $9.3 million from life insurance proceeds received during that period related to a Xenith acquired loan that had been charged off prior to the Company’s acquisition of Xenith. (4) Noninterest income for the discontinued mortgage segment is reported in Note 14 "Segment Reporting & Discontinued Operations."

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Reconciliation of the Denominators of the Basic and Diluted EPS Computations	The following table presents EPS from continuing operations, discontinued operations and total net income available to common shareholders for the three and nine months ended September 30, 2020 and 2019 (dollars in thousands except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ September 30, ​ September 30, ​ ​ 2020 ​ 2019 ​ 2020 ​ 2019 Net Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income from continuing operations ​ $ 61,000 ​ $ 53,196 ​ $ 98,798 ​ $ 137,820 Income (loss) from discontinued operations ​ — ​ 42 ​ — ​ (128) Net Income ​ ​ 61,000 ​ ​ 53,238 ​ ​ 98,798 ​ ​ 137,692 Preferred Stock Dividends ​ ​ 2,691 ​ ​ — ​ ​ 2,691 ​ ​ — Net income available to common shareholders ​ $ 58,309 ​ $ 53,238 ​ $ 96,107 ​ $ 137,692 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average shares outstanding, basic ​ 78,714 ​ 81,769 ​ 78,905 ​ 80,121 Dilutive effect of stock awards and warrants ​ 11 ​ 64 ​ 16 ​ 63 Weighted average shares outstanding, diluted ​ 78,725 ​ 81,833 ​ 78,921 ​ 80,184 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS: ​ ​ ​ ​ ​ ​ ​ ​ EPS from continuing operations ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 EPS from discontinued operations ​ — ​ — ​ — ​ — EPS available to common shareholders ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted EPS: ​ ​ ​ ​ ​ ​ ​ ​ EPS from continuing operations ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72 EPS from discontinued operations ​ — ​ — ​ — ​ — EPS available to common shareholders ​ $ 0.74 ​ $ 0.65 ​ $ 1.22 ​ $ 1.72

SEGMENT REPORTING & DISCONTIN_2

SEGMENT REPORTING & DISCONTINUED OPERATIONS (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Information About Reportable Segments and Reconciliation	The following table presents summarized operating results of the discontinued mortgage segment for the three and nine months ended September 30, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ September 30, 2019 September 30, 2019 Net interest income $ — ​ $ — Provision for credit losses ​ — ​ ​ — Net interest income after provision for credit losses ​ — ​ ​ — Noninterest income ​ — ​ ​ 1 Noninterest expenses ​ (56) ​ ​ 174 Income before income taxes ​ 56 ​ ​ (173) Income tax expense (benefit) ​ 14 ​ ​ (45) Net income (loss) on discontinued operations $ 42 ​ $ (128)

ACCOUNTING POLICIES (Narrative)

ACCOUNTING POLICIES (Narrative) (Details) $ in Thousands	Jun. 09, 2020USD ($)	Feb. 01, 2019USD ($)shares	Sep. 30, 2020USD ($)itemloan	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Accounting Policies [Line Items]
Number of bank branches | item			135
Number of ATM's | item			155
Goodwill			$ 935,560		$ 935,560
Cash paid in acquisition			0	$ 12
Issuance of preferred stock			173		$ 0
Net proceeds from issuance of preferred stock			166,356	$ 0
Available-for-sale Securities
Accounting Policies [Line Items]
Accrued interest receivable			55,400
Held-to-maturity Securities
Accounting Policies [Line Items]
Accrued interest receivable			5,100
Access National Bank
Accounting Policies [Line Items]
Number of shares equivalent to each share of acquired entity | shares		0.75
Company's common shares issued | shares		15,842,026
Cash paid in acquisition		$ 12
Paycheck Protection Program (PPP)
Accounting Policies [Line Items]
Total value of loans approved by SBA under the CARES Act			1,800,000
Approved Loan Modification Under the Cares Act			769,600
Loans issued under the CARES Act			1,700,000
Loans, recorded investment under the CARES Act			1,600,000
Loan origination fees Under the CARES Act			$ 32,600
Paycheck Protection Program (PPP) | Minimum
Accounting Policies [Line Items]
Number of loans processed under the CARES Act | loan			11,000
Series A Preferred Stock
Accounting Policies [Line Items]
Net proceeds from issuance of preferred stock	$ 166,400

ACCOUNTING POLICIES - New Accou

ACCOUNTING POLICIES - New Accounting Standards (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans	$ 174,122	$ 169,977	$ 89,778	$ 42,294	$ 43,820	$ 41,045
Available for sale securities, allowance for credit losses	0
Decrease in retained earnings	579,269			$ 581,395
Increase in allowance for credit losses on Purchased with Credit Deterioration (PCD) assets	2,386
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses			2,400
Restatement Adjustment | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans			$ 47,484
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in retained earnings	$ (39,100)

ACCOUNTING POLICIES - New Acc_2

ACCOUNTING POLICIES - New Accounting Standards (Illustration of the Impact of ASC 326) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Item Effected [Line Items]
Allowance for credit losses on loans	$ 174,122	$ 169,977	$ 89,778	$ 42,294	$ 43,820	$ 41,045
Total Allowance for credit losses	174,122		94,838	42,294
Previous Accounting Guidance
Item Effected [Line Items]
Allowance for credit losses on loans				42,294
Total Allowance for credit losses				43,194
Accounting Standards Update 2016-13 | Restatement Adjustment
Item Effected [Line Items]
Allowance for credit losses on loans			47,484
Total Allowance for credit losses			51,644
Commercial Portfolio
Item Effected [Line Items]
Allowance for credit losses on loans	126,655	111,954	37,125	30,941
Commercial Portfolio | Previous Accounting Guidance
Item Effected [Line Items]
Allowance for credit losses on loans				30,941
Commercial Portfolio | Accounting Standards Update 2016-13 | Restatement Adjustment
Item Effected [Line Items]
Allowance for credit losses on loans			6,184
Consumer Portfolio
Item Effected [Line Items]
Allowance for credit losses on loans	$ 47,467	$ 58,023	52,653	11,353
Consumer Portfolio | Previous Accounting Guidance
Item Effected [Line Items]
Allowance for credit losses on loans				11,353
Consumer Portfolio | Accounting Standards Update 2016-13 | Restatement Adjustment
Item Effected [Line Items]
Allowance for credit losses on loans			41,300
Unfunded Commitments
Item Effected [Line Items]
Total Allowance for credit losses			5,060
Unfunded Commitments | Previous Accounting Guidance
Item Effected [Line Items]
Total Allowance for credit losses				$ 900
Unfunded Commitments | Accounting Standards Update 2016-13 | Restatement Adjustment
Item Effected [Line Items]
Total Allowance for credit losses			$ 4,160

ACQUISITIONS (Narrative) (Detai

ACQUISITIONS (Narrative) (Details) - USD ($) $ in Thousands	Feb. 01, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Cash paid in acquisition				$ 0	$ 12
Merger-related costs		$ 0	$ 2,435	0	26,928
Access National Bank
Business Acquisition [Line Items]
Number of shares equivalent to each share of acquired entity	0.75
Company's common shares issued	15,842,026
Consideration transferred, fair value	$ 500,000
Cash paid in acquisition	$ 12
Merger-related costs			$ 2,000	$ 0	$ 25,600

SECURITIES (Narrative) (Details

SECURITIES (Narrative) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2020USD ($)security	Dec. 31, 2019USD ($)security
Schedule of Investments [Line Items]
Available for sale securities that had been in a continuous loss position for more than 12 months	$ 27,800,000	$ 75,000,000
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss	314,000	696,000
AFS securities in an unrealized loss, credit related impairment	0	$ 0
Available for sale securities, allowance for credit losses	0
Available for sale securities past due or non-accrual	0
HTM securities, additional reserve for allowance for credit losses	0
Held to maturity securities, past due	$ 0
Federal Home Loan Bank requires Bank to maintain percentage of stock equal to outstanding borrowings	4.25%	4.25%
Percentage of Federal Reserve Bank of Richmond reserve	6.00%	6.00%
Restricted equity securities consist of Federal Reserve Bank stock	$ 67,000,000	$ 67,000,000
Federal Home Loan Bank Stock	$ 45,200,000	$ 63,900,000
Available-for-sale Securities
Schedule of Investments [Line Items]
Available for sale securities that had been in a continuous loss position for more than 12 months, Number of issues | security	18	47
Non-agency collateralized mortgage obligations
Schedule of Investments [Line Items]
SSFA rating percentage	20.00%

SECURITIES (Amortized Cost, Gro

SECURITIES (Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	$ 2,352,916	$ 1,893,427
Gross Unrealized Gains	95,593	53,918
Gross Unrealized (Losses)	(5,169)	(1,900)
Total AFS securities, Estimated Fair Value	2,443,340	1,945,445
U.S. government and agency securities
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	13,463	21,149
Gross Unrealized Gains	465	209
Gross Unrealized (Losses)	(50)	(38)
Total AFS securities, Estimated Fair Value	13,878	21,320
Obligations of states and political subdivisions
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	759,936	421,344
Gross Unrealized Gains	39,033	25,776
Gross Unrealized (Losses)	(2,113)	(29)
Total AFS securities, Estimated Fair Value	796,856	447,091
Corporate and other bonds
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	147,438	134,342
Gross Unrealized Gains	2,217	1,991
Gross Unrealized (Losses)	(737)	(374)
Total AFS securities, Estimated Fair Value	148,918	135,959
Commercial
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	371,065	416,904
Gross Unrealized Gains	18,016	8,786
Gross Unrealized (Losses)	(116)	(643)
Total AFS securities, Estimated Fair Value	388,965	425,047
Commercial | Agency
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	340,706	405,731
Gross Unrealized Gains	17,945	8,786
Gross Unrealized (Losses)	(116)	(619)
Total AFS securities, Estimated Fair Value	358,535	413,898
Commercial | Non-agency
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	30,359	11,173
Gross Unrealized Gains	71
Gross Unrealized (Losses)		(24)
Total AFS securities, Estimated Fair Value	30,430	11,149
Residential
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	1,059,393	896,609
Gross Unrealized Gains	35,862	17,156
Gross Unrealized (Losses)	(2,153)	(816)
Total AFS securities, Estimated Fair Value	1,093,102	912,949
Residential | Agency
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	960,141	852,300
Gross Unrealized Gains	35,275	16,680
Gross Unrealized (Losses)	(1,410)	(816)
Total AFS securities, Estimated Fair Value	994,006	868,164
Residential | Non-agency
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	99,252	44,309
Gross Unrealized Gains	587	476
Gross Unrealized (Losses)	(743)
Total AFS securities, Estimated Fair Value	99,096	44,785
Other securities
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	1,621	3,079
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Total AFS securities, Estimated Fair Value	$ 1,621	$ 3,079

SECURITIES (Schedule of Gross U

SECURITIES (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	$ 502,977,000	$ 198,348,000
Less than 12 Months, Unrealized Losses	(4,855,000)	(1,204,000)
More than 12 Months, Fair Value	27,806,000	75,035,000
More than 12 Months, Unrealized Losses	(314,000)	(696,000)
Total, Fair Value	530,783,000	273,383,000
Unrealized Losses, Total	(5,169,000)	(1,900,000)
U.S. government and agency securities
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	0	7,638,000
Less than 12 Months, Unrealized Losses	0	(38,000)
More than 12 Months, Fair Value	5,956,000	0
More than 12 Months, Unrealized Losses	(50,000)	0
Total, Fair Value	5,956,000	7,638,000
Unrealized Losses, Total	(50,000)	(38,000)
Obligations of states and political subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	175,282,000	4,526,000
Less than 12 Months, Unrealized Losses	(2,113,000)	(29,000)
More than 12 Months, Fair Value	0	0
More than 12 Months, Unrealized Losses	0	0
Total, Fair Value	175,282,000	4,526,000
Unrealized Losses, Total	(2,113,000)	(29,000)
Corporate and other bonds
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	38,137,000	17,323,000
Less than 12 Months, Unrealized Losses	(477,000)	(83,000)
More than 12 Months, Fair Value	20,283,000	19,901,000
More than 12 Months, Unrealized Losses	(260,000)	(291,000)
Total, Fair Value	58,420,000	37,224,000
Unrealized Losses, Total	(737,000)	(374,000)
Commercial
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	33,827,000	54,714,000
Less than 12 Months, Unrealized Losses	(115,000)	(554,000)
More than 12 Months, Fair Value	446,000	14,966,000
More than 12 Months, Unrealized Losses	(1,000)	(89,000)
Total, Fair Value	34,273,000	69,680,000
Unrealized Losses, Total	(116,000)	(643,000)
Residential
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	255,731,000	114,147,000
Less than 12 Months, Unrealized Losses	(2,150,000)	(500,000)
More than 12 Months, Fair Value	1,121,000	40,168,000
More than 12 Months, Unrealized Losses	(3,000)	(316,000)
Total, Fair Value	256,852,000	154,315,000
Unrealized Losses, Total	(2,153,000)	(816,000)
Agency | Commercial
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	33,827,000	43,552,000
Less than 12 Months, Unrealized Losses	(115,000)	(530,000)
More than 12 Months, Fair Value	446,000	14,966,000
More than 12 Months, Unrealized Losses	(1,000)	(89,000)
Total, Fair Value	34,273,000	58,518,000
Unrealized Losses, Total	(116,000)	(619,000)
Agency | Residential
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	198,687,000	114,147,000
Less than 12 Months, Unrealized Losses	(1,407,000)	(500,000)
More than 12 Months, Fair Value	1,121,000	40,168,000
More than 12 Months, Unrealized Losses	(3,000)	(316,000)
Total, Fair Value	199,808,000	154,315,000
Unrealized Losses, Total	(1,410,000)	(816,000)
Non-agency | Commercial
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	0	11,162,000
Less than 12 Months, Unrealized Losses	0	(24,000)
More than 12 Months, Fair Value	0	0
More than 12 Months, Unrealized Losses	0	0
Total, Fair Value	0	11,162,000
Unrealized Losses, Total	0	(24,000)
Non-agency | Residential
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	57,044,000	0
Less than 12 Months, Unrealized Losses	(743,000)	0
More than 12 Months, Fair Value	0	0
More than 12 Months, Unrealized Losses	0	0
Total, Fair Value	57,044,000	0
Unrealized Losses, Total	$ (743,000)	$ 0

SECURITIES (Amortized Cost of A

SECURITIES (Amortized Cost of AFS Securities by Security Type and Credit Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	$ 2,352,916	$ 1,893,427
U.S. government and agency securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	13,463	21,149
Obligations of states and political subdivisions
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	759,936	421,344
Corporate and other bonds
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	147,438	134,342
Other securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	$ 1,621	$ 3,079

SECURITIES (Schedule of Amortiz

SECURITIES (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
AFS Securities [Abstract]
Due in one year or less, Amortized Cost	$ 28,581	$ 35,177
Due in one year or less, Estimated Fair Value	28,834	35,329
Due after one year through five years, Amortized Cost	140,844	164,605
Due after one year through five years, Estimated Fair Value	148,114	166,873
Due after five years through ten years, Amortized Cost	251,501	249,713
Due after five years through ten years, Estimated Fair Value	258,806	254,790
Due after ten years, Amortized Cost	1,931,990	1,443,932
Due after ten years, Estimated Fair Value	2,007,586	1,488,453
Total AFS securities	2,352,916	1,893,427
Total AFS securities, Estimated Fair Value	2,443,340	1,945,445
HTM Securities [Abstract]
Due in one year or less, Carrying Value	1,005	502
Due in one year or less, Estimated Fair Value	1,024	504
Due after one year through five years, Carrying Value	9,076	10,258
Due after one year through five years, Estimated Fair Value	9,436	10,539
Due after five years through ten years, Carrying Value	1,749	1,768
Due after five years through ten years, Estimated Fair Value	1,796	1,800
Due after ten years, Carrying Value	534,831	542,616
Due after ten years, Estimated Fair Value	601,917	590,660
Total HTM Securities	546,661	555,144
Total HTM securities, Estimated Fair Value	$ 614,173	$ 603,503

SECURITIES (Schedule of Carryin

SECURITIES (Schedule of Carrying Value, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	$ 546,661	$ 555,144
Gross Unrealized Gains	67,566	48,359
Gross Unrealized Losses	(54)	0
Held-to-maturity Securities, Fair Value	614,173	603,503
U.S. government and agency securities
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	2,767	2,813
Gross Unrealized Gains	0	26
Gross Unrealized Losses	(14)	0
Held-to-maturity Securities, Fair Value	2,753	2,839
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	538,352	545,148
Gross Unrealized Gains	67,561	48,274
Gross Unrealized Losses	0	0
Held-to-maturity Securities, Fair Value	605,913	593,422
Commercial
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	5,542	7,183
Gross Unrealized Gains	5	59
Gross Unrealized Losses	(40)	0
Held-to-maturity Securities, Fair Value	5,507	7,242
Agency | Commercial
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	5,542	7,183
Gross Unrealized Gains	5	59
Gross Unrealized Losses	(40)	0
Held-to-maturity Securities, Fair Value	5,507	7,242
Non-agency | Commercial
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Held-to-maturity Securities, Fair Value	$ 0	$ 0

SECURITIES (Amortized Cost of H

SECURITIES (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details) $ in Thousands	Sep. 30, 2020USD ($)
HTM Securities, Amortized Cost	$ 546,661
Moody's AAA/AA/A | Standard & Poor's AAA/AA/A
HTM Securities, Amortized Cost	533,742
Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]
HTM Securities, Amortized Cost	8,309
Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]
HTM Securities, Amortized Cost	4,610
U.S. government and agency securities
HTM Securities, Amortized Cost	2,767
U.S. government and agency securities | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A
HTM Securities, Amortized Cost	0
U.S. government and agency securities | Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]
HTM Securities, Amortized Cost	2,767
U.S. government and agency securities | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]
HTM Securities, Amortized Cost	0
Obligations of states and political subdivisions
HTM Securities, Amortized Cost	538,352
Obligations of states and political subdivisions | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A
HTM Securities, Amortized Cost	533,742
Obligations of states and political subdivisions | Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]
HTM Securities, Amortized Cost	0
Obligations of states and political subdivisions | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]
HTM Securities, Amortized Cost	4,610
Total mortgage-back securities
HTM Securities, Amortized Cost	5,542
Total mortgage-back securities | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A
HTM Securities, Amortized Cost	0
Total mortgage-back securities | Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]
HTM Securities, Amortized Cost	5,542
Total mortgage-back securities | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]
HTM Securities, Amortized Cost	$ 0

SECURITIES (Gross Realized Gain

SECURITIES (Gross Realized Gains and Losses on the Sale of Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Securities [Abstract]
Gross realized gains	$ 18	$ 7,104	$ 12,522	$ 9,161
Gross realized losses	0	0	(229)	(1,855)
Gains on securities transactions, net	18	7,104	12,293	7,306
Proceeds from sales of securities	$ 4,675	$ 98,975	$ 232,946	$ 486,925

LOANS AND ALLOWANCE FOR LOAN _3

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	$ 14,383,215		$ 12,610,936
Total Allowance for credit losses	(174,122)	$ (94,838)	(42,294)
Total loans held for investment, net	14,209,093		12,568,642
Construction and Land Development
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	1,207,190		1,250,924
Commercial Real Estate - Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	2,107,333		2,041,243
Commercial Real Estate - Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	3,497,929		3,286,098
Multifamily Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	731,582		633,743
Commercial and Industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	3,536,249		2,114,033
Residential 1-4 Family - Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	696,944		724,337
Residential 1-4 Family - Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	830,144		890,503
Residential 1-4 Family - Revolving
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	618,320		659,504
Auto
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	387,417		350,419
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	276,023		372,853
Other Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	494,084		$ 287,279
Paycheck Protection Program (PPP)
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment, net	769,600
Paycheck Protection Program (PPP) | Commercial and Industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment, net	1,600,000
Paycheck Protection Program (PPP) | Other Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment, net	$ 21,300

LOANS AND ALLOWANCE FOR LOAN _4

LOANS AND ALLOWANCE FOR LOAN LOSSES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 39,023	$ 39,023		$ 45,204	$ 28,232
Nonaccrual interest income	0	$ 0
Period for restructured loan to be considered default		90 days
Acquired performing loan portfolio	14,383,215	$ 14,383,215			12,610,936
Allowance for credit losses on loans	174,122	174,122	$ 169,977	89,778	42,294	$ 43,820	$ 41,045
Troubled Debt Restructurings (TDRs)	21,560	21,560			19,496
Total Allowance for credit losses	174,122	174,122		$ 94,838	42,294
Loans, recorded investment under the Cares Act	14,209,093	14,209,093			12,568,642
Troubled Debt Restructurings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings (TDRs)	21,600	21,600
Total Allowance for credit losses	2,700	2,700
Acquired Performing Loan Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired performing loan portfolio					3,000,000
Remaining discount on acquired loans					50,100
Purchased Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired performing loan portfolio	68,800	68,800			86,681
Allowance for credit losses on loans	4,700	4,700			217
Purchased impaired loans (gross)					$ 104,900
Paycheck Protection Program (PPP)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, recorded investment under the Cares Act	$ 769,600	$ 769,600

LOANS AND ALLOWANCE FOR LOAN _5

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 14,293,262		$ 12,419,378
Greater Than 90 Days and Still Accruing	15,661		13,396
Nonaccrual	39,023	$ 45,204	28,232
Total Loans	14,383,215		12,610,936
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	23,211		50,453
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12,058		12,796
Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			70,267
Total Loans	68,800		86,681
Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			3,221
Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			13,193
Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,200,729		1,231,043
Greater Than 90 Days and Still Accruing	93		189
Nonaccrual	3,520	4,060	3,703
Total Loans	1,207,190		1,250,924
Construction and Land Development | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,625		4,563
Construction and Land Development | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	223		482
Construction and Land Development | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			10,465
Total Loans			10,944
Construction and Land Development | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			136
Construction and Land Development | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			343
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,090,106		2,001,074
Greater Than 90 Days and Still Accruing	1,726		1,062
Nonaccrual	9,267	13,889	6,003
Total Loans	2,107,333		2,041,243
Commercial Real Estate - Owner Occupied | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,924		3,482
Commercial Real Estate - Owner Occupied | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,310		2,184
Commercial Real Estate - Owner Occupied | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			20,074
Total Loans			27,438
Commercial Real Estate - Owner Occupied | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			480
Commercial Real Estate - Owner Occupied | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			6,884
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,493,107		3,269,244
Greater Than 90 Days and Still Accruing	168		1,451
Nonaccrual	1,992	1,368	381
Total Loans	3,497,929		3,286,098
Commercial Real Estate - Non-Owner Occupied | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,291		457
Commercial Real Estate - Non-Owner Occupied | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,371		0
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			12,730
Total Loans			14,565
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			848
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			987
Multifamily Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	731,190		632,952
Greater Than 90 Days and Still Accruing	359		474
Nonaccrual	33	0	0
Total Loans	731,582		633,743
Multifamily Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			223
Multifamily Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			0
Multifamily Real Estate | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			94
Total Loans			94
Multifamily Real Estate | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			0
Multifamily Real Estate | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			0
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,528,283		2,099,974
Greater Than 90 Days and Still Accruing	604		449
Nonaccrual	1,592	3,037	1,735
Total Loans	3,536,249		2,114,033
Commercial and Industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,322		8,698
Commercial and Industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,448		1,598
Commercial and Industrial | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			590
Total Loans			1,579
Commercial and Industrial | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			989
Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	683,730		703,471
Greater Than 90 Days and Still Accruing	5,298		674
Nonaccrual	5,743	6,492	4,301
Total Loans	696,944		724,337
Residential 1-4 Family - Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,236		1,479
Residential 1-4 Family - Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	937		2,207
Residential 1-4 Family - Commercial | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			9,667
Total Loans			12,205
Residential 1-4 Family - Commercial | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			543
Residential 1-4 Family - Commercial | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			1,995
Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	806,055		842,667
Greater Than 90 Days and Still Accruing	4,495		4,515
Nonaccrual	12,620	13,117	9,292
Total Loans	830,144		890,503
Residential 1-4 Family - Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,998		16,244
Total Loans	2,998
Residential 1-4 Family - Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,976		3,072
Total Loans	3,976
Residential 1-4 Family - Consumer | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	4,495
Residential 1-4 Family - Consumer | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			12,005
Total Loans			14,713
Residential 1-4 Family - Consumer | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			927
Residential 1-4 Family - Consumer | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			1,781
Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	608,570		637,966
Greater Than 90 Days and Still Accruing	2,276		3,357
Nonaccrual	3,664	2,490	2,080
Total Loans	618,320		659,504
Residential 1-4 Family - Revolving | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,669		10,190
Total Loans	2,669
Residential 1-4 Family - Revolving | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,141		1,784
Total Loans	1,141
Residential 1-4 Family - Revolving | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,276
Residential 1-4 Family - Revolving | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			3,635
Total Loans			4,127
Residential 1-4 Family - Revolving | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			287
Residential 1-4 Family - Revolving | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			205
Auto
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	384,619		346,819
Greater Than 90 Days and Still Accruing	315		272
Nonaccrual	517	565	563
Total Loans	387,417		350,419
Auto | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,513		2,525
Total Loans	1,513
Auto | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	453		236
Total Loans	453
Auto | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	315
Auto | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			4
Total Loans			4
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	273,829		367,794
Greater Than 90 Days and Still Accruing	327		953
Nonaccrual	75	88	77
Total Loans	276,023		372,853
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,020		2,128
Total Loans	1,020
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	772		1,233
Total Loans	772
Consumer | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	327
Consumer | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			659
Total Loans			668
Consumer | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			9
Other Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	493,044		286,374
Greater Than 90 Days and Still Accruing	0		0
Nonaccrual		$ 98	97
Total Loans	494,084		287,279
Other Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	613		464
Other Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 427		0
Other Commercial | Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			344
Total Loans			344
Other Commercial | Purchased Impaired | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			0
Other Commercial | Purchased Impaired | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due			$ 0

LOANS AND ALLOWANCE FOR LOAN _6

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Loans on Nonaccrual Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 39,023	$ 45,204	$ 28,232
Nonaccrual With No Allowance For Credit Losses	6,846
Loans Past Due Over 89 Days Still Accruing	15,661		13,396
Construction and Land Development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,520	4,060	3,703
Nonaccrual With No Allowance For Credit Losses	1,985
Loans Past Due Over 89 Days Still Accruing	93		189
Commercial Real Estate - Owner Occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	9,267	13,889	6,003
Nonaccrual With No Allowance For Credit Losses	1,994
Loans Past Due Over 89 Days Still Accruing	1,726		1,062
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,992	1,368	381
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	168		1,451
Multifamily Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	33	0	0
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	359		474
Commercial and Industrial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,592	3,037	1,735
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	604		449
Residential 1-4 Family - Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	5,743	6,492	4,301
Nonaccrual With No Allowance For Credit Losses	1,738
Loans Past Due Over 89 Days Still Accruing	5,298		674
Residential 1-4 Family - Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	12,620	13,117	9,292
Nonaccrual With No Allowance For Credit Losses	1,069
Loans Past Due Over 89 Days Still Accruing	4,495		4,515
Residential 1-4 Family - Revolving
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,664	2,490	2,080
Nonaccrual With No Allowance For Credit Losses	60
Loans Past Due Over 89 Days Still Accruing	2,276		3,357
Auto
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	517	565	563
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	315		272
Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	75	88	77
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	327		953
Other Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual		$ 98	97
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	$ 0		$ 0

LOANS AND ALLOWANCE FOR LOAN _7

LOANS AND ALLOWANCE FOR LOAN LOSSES (Impaired Loans Individually Evaluated for Impairment by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2019
Recorded Investment
Loans without a specific allowance			$ 35,185
Loans with a specific allowance			23,938
Total impaired loans			59,123
Unpaid Principal Balance
Loans without a specific allowance			38,655
Loans with a specific allowance			25,738
Total impaired loans			64,393
Related Allowance			3,027
Average Investment	$ 64,539	$ 66,182
Interest Income Recognized	337	1,402
Construction and Land Development
Recorded Investment
Loans without a specific allowance			5,877
Loans with a specific allowance			984
Unpaid Principal Balance
Loans without a specific allowance			7,174
Loans with a specific allowance			1,032
Related Allowance			49
Average Investment	13,581	13,601
Interest Income Recognized	40	351
Commercial Real Estate - Owner Occupied
Recorded Investment
Loans without a specific allowance			8,801
Loans with a specific allowance			2,820
Unpaid Principal Balance
Loans without a specific allowance			9,296
Loans with a specific allowance			3,093
Related Allowance			146
Average Investment	13,301	13,436
Interest Income Recognized	85	339
Commercial Real Estate - Non-Owner Occupied
Recorded Investment
Loans without a specific allowance			3,510
Loans with a specific allowance			335
Unpaid Principal Balance
Loans without a specific allowance			4,059
Loans with a specific allowance			383
Related Allowance			2
Average Investment	2,748	3,543
Interest Income Recognized	26	82
Multifamily Real Estate
Unpaid Principal Balance
Average Investment	1,217	1,234
Interest Income Recognized	15	46
Commercial and Industrial
Recorded Investment
Loans without a specific allowance			3,668
Loans with a specific allowance			2,568
Unpaid Principal Balance
Loans without a specific allowance			3,933
Loans with a specific allowance			2,590
Related Allowance			619
Average Investment	3,986	4,046
Interest Income Recognized	41	129
Residential 1-4 Family - Commercial
Recorded Investment
Loans without a specific allowance			4,047
Loans with a specific allowance			1,726
Unpaid Principal Balance
Loans without a specific allowance			4,310
Loans with a specific allowance			1,819
Related Allowance			162
Average Investment	6,334	6,521
Interest Income Recognized	41	125
Residential 1-4 Family - Consumer
Recorded Investment
Loans without a specific allowance			8,420
Loans with a specific allowance			12,026
Unpaid Principal Balance
Loans without a specific allowance			9,018
Loans with a specific allowance			12,670
Related Allowance			1,242
Average Investment	19,802	20,007
Interest Income Recognized	75	264
Residential 1-4 Family - Revolving
Recorded Investment
Loans without a specific allowance			862
Loans with a specific allowance			2,186
Unpaid Principal Balance
Loans without a specific allowance			865
Loans with a specific allowance			2,369
Related Allowance			510
Average Investment	691	781
Interest Income Recognized		9
Auto
Recorded Investment
Loans with a specific allowance			563
Unpaid Principal Balance
Loans with a specific allowance			879
Related Allowance			221
Average Investment	2,125	2,242
Interest Income Recognized	5	31
Consumer
Recorded Investment
Loans with a specific allowance			168
Unpaid Principal Balance
Loans with a specific allowance			336
Related Allowance			46
Average Investment	184	192
Interest Income Recognized	2	5
Other Commercial
Recorded Investment
Loans with a specific allowance			562
Unpaid Principal Balance
Loans with a specific allowance			567
Related Allowance			$ 30
Average Investment	570	579
Interest Income Recognized	$ 7	$ 21

LOANS AND ALLOWANCE FOR LOAN _8

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Modified Loans that Continue to Accrue Interest Under the Terms of Restructuring Agreement) (Details) $ in Thousands	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)loan
Financing Receivable, Modifications [Line Items]
No. of Loans	143	120
Recorded Investment	$ 21,560	$ 19,496
Outstanding Commitment	$ 101	$ 26
Performing
Financing Receivable, Modifications [Line Items]
No. of Loans	107	96
Recorded Investment	$ 14,515	$ 15,686
Outstanding Commitment	$ 101	$ 26
Performing | Construction and Land Development
Financing Receivable, Modifications [Line Items]
No. of Loans	4	4
Recorded Investment	$ 219	$ 1,114
Outstanding Commitment	$ 0	$ 0
Performing | Commercial Real Estate - Owner Occupied
Financing Receivable, Modifications [Line Items]
No. of Loans	6	6
Recorded Investment	$ 2,140	$ 2,228
Outstanding Commitment	$ 101	$ 26
Performing | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Modifications [Line Items]
No. of Loans	1	1
Recorded Investment	$ 1,089	$ 1,089
Outstanding Commitment	$ 0	$ 0
Performing | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
No. of Loans	5	4
Recorded Investment	$ 1,117	$ 1,020
Outstanding Commitment	$ 0	$ 0
Performing | Residential 1-4 Family - Commercial
Financing Receivable, Modifications [Line Items]
No. of Loans	3	5
Recorded Investment	$ 247	$ 290
Outstanding Commitment	$ 0	$ 0
Performing | Residential 1-4 Family - Consumer
Financing Receivable, Modifications [Line Items]
No. of Loans	80	69
Recorded Investment	$ 9,165	$ 9,396
Outstanding Commitment	$ 0	$ 0
Performing | Residential 1-4 Family - Revolving
Financing Receivable, Modifications [Line Items]
No. of Loans	2	2
Recorded Investment	$ 55	$ 56
Outstanding Commitment	$ 0	$ 0
Performing | Consumer
Financing Receivable, Modifications [Line Items]
No. of Loans	5	4
Recorded Investment	$ 31	$ 29
Outstanding Commitment	$ 0	$ 0
Performing | Other Commercial
Financing Receivable, Modifications [Line Items]
No. of Loans	1	1
Recorded Investment	$ 452	$ 464
Outstanding Commitment	$ 0	$ 0
Nonperforming
Financing Receivable, Modifications [Line Items]
No. of Loans	36	24
Recorded Investment	$ 7,045	$ 3,810
Outstanding Commitment	$ 0	$ 0
Nonperforming | Commercial Real Estate - Owner Occupied
Financing Receivable, Modifications [Line Items]
No. of Loans	2	2
Recorded Investment	$ 293	$ 176
Outstanding Commitment	$ 0	$ 0
Nonperforming | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Modifications [Line Items]
No. of Loans	1
Recorded Investment	$ 137
Outstanding Commitment	$ 0
Nonperforming | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
No. of Loans	3	1
Recorded Investment	$ 261	$ 55
Outstanding Commitment	$ 0	$ 0
Nonperforming | Residential 1-4 Family - Commercial
Financing Receivable, Modifications [Line Items]
No. of Loans	4
Recorded Investment	$ 1,313
Outstanding Commitment	$ 0
Nonperforming | Residential 1-4 Family - Consumer
Financing Receivable, Modifications [Line Items]
No. of Loans	23	19
Recorded Investment	$ 4,937	$ 3,522
Outstanding Commitment	$ 0	$ 0
Nonperforming | Residential 1-4 Family - Revolving
Financing Receivable, Modifications [Line Items]
No. of Loans	3	2
Recorded Investment	$ 104	$ 57
Outstanding Commitment	$ 0	$ 0

LOANS AND ALLOWANCE FOR LOAN _9

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of TDR by Class and Modification Type) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	8	11	33	29
Recorded Investment at Period End | $	$ 1,807	$ 1,902	$ 4,805	$ 3,616
Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1	4	9	9
Recorded Investment at Period End | $	$ 299	$ 855	$ 760	$ 1,236
Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	6	7	22	20
Recorded Investment at Period End | $	$ 856	$ 1,047	$ 3,121	$ 2,380
Interest rate modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0		0
Recorded Investment at Period End | $	$ 0		$ 0
Modified to interest only, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1		2
Recorded Investment at Period End | $	$ 652		$ 924
Construction and Land Development | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0	2	1	2
Recorded Investment at Period End | $	$ 0	$ 164	$ 34	$ 164
Commercial Real Estate - Owner Occupied | Modified to interest only, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0		1
Recorded Investment at Period End | $	$ 0		$ 272
Commercial and Industrial | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0		3
Recorded Investment at Period End | $	$ 0		$ 127
Commercial and Industrial | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1		2
Recorded Investment at Period End | $	$ 143		$ 358
Commercial and Industrial | Modified to interest only, at a market rate | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan		1		1
Recorded Investment at Period End | $		$ 376		$ 376
Residential 1-4 Family - Commercial | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1		1	1
Recorded Investment at Period End | $	$ 299		$ 299	$ 73
Residential 1-4 Family - Commercial | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1		1
Recorded Investment at Period End | $	$ 290		$ 290
Residential 1-4 Family - Commercial | Modified to interest only, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1		1
Recorded Investment at Period End | $	$ 652		$ 652
Residential 1-4 Family - Consumer | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0	1	4	4
Recorded Investment at Period End | $	$ 0	$ 461	$ 324	$ 761
Residential 1-4 Family - Consumer | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	4	5	17	17
Recorded Investment at Period End | $	$ 423	$ 883	$ 2,387	$ 2,211
Residential 1-4 Family - Revolving | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0		1
Recorded Investment at Period End | $	$ 0		$ 52
Consumer | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0	2	1	3
Recorded Investment at Period End | $	$ 0	$ 18	$ 10	$ 26
Consumer | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan				1
Recorded Investment at Period End | $				$ 5

LOANS AND ALLOWANCE FOR LOAN_10

LOANS AND ALLOWANCE FOR LOAN LOSSES (Allowance for Loan Loss Activity, by Portfolio Segment, Balances for Allowance for Credit Losses, and Loans Based on Impairment Methodology) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Allowance for loan losses:
Balance, beginning of the year	$ 169,977	$ 42,294	$ 41,045
Impact of ASC 326 adoption on non-PCD loans				$ 45,098
Impact of ASC 326 adoption on PCD loans		2,386
Impact of ASC 326 adoption		47,484
Loans charged off	(2,978)	(14,806)	(21,190)
Recoveries credited to allowance	1,566	5,137	4,940
Provision charged to operations	5,557	94,013	19,025
Balance, end of period	174,122	174,122	43,820
Loans:
Loans individually evaluated for impairment						$ 59,123
ALLL individually evaluated for impairment						3,027
Loans collectively evaluated for impairment						12,465,132
ALLL collectively evaluated for impairment						39,050
Total Loans				14,383,215		12,610,936
Total ALLL	174,122	174,122	43,820	174,122	$ 89,778	42,294
Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		217
Balance, end of period	4,700	4,700
Loans:
Total Loans				68,800		86,681
Total ALLL	4,700	217		4,700		217
Construction and Land Development
Allowance for loan losses:
Balance, beginning of the year		5,758	6,803
Loans charged off			(4,028)
Recoveries credited to allowance			269
Provision charged to operations			2,863
Balance, end of period			5,907
Loans:
Loans individually evaluated for impairment						6,861
ALLL individually evaluated for impairment						49
Loans collectively evaluated for impairment						1,233,119
ALLL collectively evaluated for impairment						5,709
Total Loans				1,207,190		1,250,924
Total ALLL		5,758	5,907			5,758
Construction and Land Development | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						10,944
Total ALLL		0				0
Commercial Real Estate - Owner Occupied
Allowance for loan losses:
Balance, beginning of the year		3,919	4,023
Loans charged off			(483)
Recoveries credited to allowance			118
Provision charged to operations			361
Balance, end of period			4,019
Loans:
Loans individually evaluated for impairment						11,621
ALLL individually evaluated for impairment						146
Loans collectively evaluated for impairment						2,002,184
ALLL collectively evaluated for impairment						3,773
Total Loans				2,107,333		2,041,243
Total ALLL		3,919	4,019			3,919
Commercial Real Estate - Owner Occupied | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						27,438
Total ALLL		0				0
Commercial Real Estate - Non-Owner Occupied
Allowance for loan losses:
Balance, beginning of the year		9,543	8,865
Loans charged off			(270)
Recoveries credited to allowance			95
Provision charged to operations			996
Balance, end of period			9,686
Loans:
Loans individually evaluated for impairment						3,845
ALLL individually evaluated for impairment						2
Loans collectively evaluated for impairment						3,267,688
ALLL collectively evaluated for impairment						9,541
Total Loans				3,497,929		3,286,098
Total ALLL		9,543	9,686			9,543
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						14,565
Total ALLL		0				0
Multifamily Real Estate
Allowance for loan losses:
Balance, beginning of the year		632	649
Loans charged off			0
Recoveries credited to allowance			85
Provision charged to operations			46
Balance, end of period			780
Loans:
Loans individually evaluated for impairment						0
ALLL individually evaluated for impairment						0
Loans collectively evaluated for impairment						633,649
ALLL collectively evaluated for impairment						632
Total Loans				731,582		633,743
Total ALLL		632	780			632
Multifamily Real Estate | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						94
Total ALLL		0				0
Commercial and Industrial
Allowance for loan losses:
Balance, beginning of the year		8,604	7,636
Loans charged off			(2,162)
Recoveries credited to allowance			936
Provision charged to operations			2,739
Balance, end of period			9,149
Loans:
Loans individually evaluated for impairment						6,236
ALLL individually evaluated for impairment						619
Loans collectively evaluated for impairment						2,106,218
ALLL collectively evaluated for impairment						7,768
Total Loans				3,536,249		2,114,033
Total ALLL		8,604	9,149			8,604
Commercial and Industrial | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		217
Loans:
Total Loans						1,579
Total ALLL		217				217
Residential 1-4 Family - Commercial
Allowance for loan losses:
Balance, beginning of the year		1,365	1,692
Loans charged off			(397)
Recoveries credited to allowance			244
Provision charged to operations			50
Balance, end of period			1,589
Loans:
Loans individually evaluated for impairment						5,773
ALLL individually evaluated for impairment						162
Loans collectively evaluated for impairment						706,359
ALLL collectively evaluated for impairment						1,203
Total Loans				696,944		724,337
Total ALLL		1,365	1,589			1,365
Residential 1-4 Family - Commercial | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						12,205
Total ALLL		0				0
Residential 1-4 Family - Consumer
Allowance for loan losses:
Balance, beginning of the year		2,013	1,492
Loans charged off			(108)
Recoveries credited to allowance			256
Provision charged to operations			158
Balance, end of period			1,798
Loans:
Loans individually evaluated for impairment						20,446
ALLL individually evaluated for impairment						1,242
Loans collectively evaluated for impairment						855,344
ALLL collectively evaluated for impairment						771
Total Loans				830,144		890,503
Total ALLL		2,013	1,798			2,013
Residential 1-4 Family - Consumer | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						14,713
Total ALLL		0				0
Auto
Allowance for loan losses:
Balance, beginning of the year		1,453	1,443
Loans charged off			(957)
Recoveries credited to allowance			452
Provision charged to operations			614
Balance, end of period			1,552
Loans:
Loans individually evaluated for impairment						563
ALLL individually evaluated for impairment						221
Loans collectively evaluated for impairment						349,852
ALLL collectively evaluated for impairment						1,232
Total Loans				387,417		350,419
Total ALLL		1,453	1,552			1,453
Auto | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						4
Total ALLL		0				0
Commercial Portfolio
Allowance for loan losses:
Balance, beginning of the year	111,954	30,941
Impact of ASC 326 adoption on non-PCD loans				4,432
Impact of ASC 326 adoption on PCD loans		1,752
Impact of ASC 326 adoption		6,184
Loans charged off	(995)	(5,553)
Recoveries credited to allowance	718	2,580
Provision charged to operations	14,978	92,503
Balance, end of period	126,655	126,655
Loans:
Total Loans				12,271,311
Total ALLL	126,655	126,655		126,655	37,125	30,941
Commercial Portfolio | Purchased Impaired
Loans:
Total Loans						86,681
Consumer
Loans:
Total Loans				276,023		372,853
Consumer | Purchased Impaired
Loans:
Total Loans						668
Consumer Portfolio
Allowance for loan losses:
Balance, beginning of the year	58,023	11,353
Impact of ASC 326 adoption on non-PCD loans				40,666
Impact of ASC 326 adoption on PCD loans		634
Impact of ASC 326 adoption		41,300
Loans charged off	(1,983)	(9,253)
Recoveries credited to allowance	848	2,557
Provision charged to operations	(9,421)	1,510
Balance, end of period	47,467	47,467
Loans:
Total Loans				2,111,904
Total ALLL	$ 47,467	47,467		47,467	$ 52,653	11,353
Consumer and all other
Allowance for loan losses:
Balance, beginning of the year		7,684	7,145
Loans charged off			(12,215)
Recoveries credited to allowance			1,896
Provision charged to operations			11,377
Balance, end of period			8,203
Loans:
Loans individually evaluated for impairment						730
ALLL individually evaluated for impairment						76
Loans collectively evaluated for impairment						658,390
ALLL collectively evaluated for impairment						7,608
Total Loans						660,132
Total ALLL		7,684	8,203			7,684
Consumer and all other | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						1,012
Total ALLL		0				0
Residential 1-4 Family - Revolving
Allowance for loan losses:
Balance, beginning of the year		1,323	1,297
Loans charged off			(570)
Recoveries credited to allowance			589
Provision charged to operations			(179)
Balance, end of period			1,137
Loans:
Loans individually evaluated for impairment						3,048
ALLL individually evaluated for impairment						510
Loans collectively evaluated for impairment						652,329
ALLL collectively evaluated for impairment						813
Total Loans				$ 618,320		659,504
Total ALLL		1,323	$ 1,137			1,323
Residential 1-4 Family - Revolving | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year		0
Loans:
Total Loans						4,127
Total ALLL		$ 0				$ 0

LOANS AND ALLOWANCE FOR LOAN_11

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 14,383,215	$ 12,610,936
Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	239,217
Term Loans Amortized Cost Basis by Origination Year, 2019	414,412
Term Loans Amortized Cost Basis by Origination Year, 2018	345,850
Term Loans Amortized Cost Basis by Origination Year, 2017	42,072
Term Loans Amortized Cost Basis by Origination Year, 2016	50,171
Term Loans Amortized Cost Basis by Origination Year, Prior	84,149
Financing Receivable, Revolving	31,319
Loans, Total	1,207,190	1,250,924
Construction and Land Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	236,949
Term Loans Amortized Cost Basis by Origination Year, 2019	346,840
Term Loans Amortized Cost Basis by Origination Year, 2018	304,768
Term Loans Amortized Cost Basis by Origination Year, 2017	41,015
Term Loans Amortized Cost Basis by Origination Year, 2016	42,268
Term Loans Amortized Cost Basis by Origination Year, Prior	63,632
Financing Receivable, Revolving	29,674
Loans, Total	1,065,146
Construction and Land Development | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	2,268
Term Loans Amortized Cost Basis by Origination Year, 2019	67,572
Term Loans Amortized Cost Basis by Origination Year, 2018	40,714
Term Loans Amortized Cost Basis by Origination Year, 2017	347
Term Loans Amortized Cost Basis by Origination Year, 2016	5,863
Term Loans Amortized Cost Basis by Origination Year, Prior	16,549
Financing Receivable, Revolving	1,645
Loans, Total	134,958
Construction and Land Development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	368
Term Loans Amortized Cost Basis by Origination Year, 2017	710
Term Loans Amortized Cost Basis by Origination Year, 2016	2,040
Term Loans Amortized Cost Basis by Origination Year, Prior	3,968
Financing Receivable, Revolving	0
Loans, Total	7,086
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	228,092
Term Loans Amortized Cost Basis by Origination Year, 2019	387,463
Term Loans Amortized Cost Basis by Origination Year, 2018	328,874
Term Loans Amortized Cost Basis by Origination Year, 2017	262,182
Term Loans Amortized Cost Basis by Origination Year, 2016	176,231
Term Loans Amortized Cost Basis by Origination Year, Prior	698,016
Financing Receivable, Revolving	26,475
Loans, Total	2,107,333	2,041,243
Commercial Real Estate - Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	226,090
Term Loans Amortized Cost Basis by Origination Year, 2019	369,661
Term Loans Amortized Cost Basis by Origination Year, 2018	304,296
Term Loans Amortized Cost Basis by Origination Year, 2017	243,299
Term Loans Amortized Cost Basis by Origination Year, 2016	143,786
Term Loans Amortized Cost Basis by Origination Year, Prior	616,113
Financing Receivable, Revolving	23,577
Loans, Total	1,926,822
Commercial Real Estate - Owner Occupied | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	2,002
Term Loans Amortized Cost Basis by Origination Year, 2019	17,684
Term Loans Amortized Cost Basis by Origination Year, 2018	23,479
Term Loans Amortized Cost Basis by Origination Year, 2017	17,770
Term Loans Amortized Cost Basis by Origination Year, 2016	31,406
Term Loans Amortized Cost Basis by Origination Year, Prior	64,728
Financing Receivable, Revolving	2,599
Loans, Total	159,668
Commercial Real Estate - Owner Occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	118
Term Loans Amortized Cost Basis by Origination Year, 2018	1,099
Term Loans Amortized Cost Basis by Origination Year, 2017	1,113
Term Loans Amortized Cost Basis by Origination Year, 2016	1,039
Term Loans Amortized Cost Basis by Origination Year, Prior	17,175
Financing Receivable, Revolving	299
Loans, Total	20,843
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	302,607
Term Loans Amortized Cost Basis by Origination Year, 2019	543,433
Term Loans Amortized Cost Basis by Origination Year, 2018	505,988
Term Loans Amortized Cost Basis by Origination Year, 2017	513,769
Term Loans Amortized Cost Basis by Origination Year, 2016	464,215
Term Loans Amortized Cost Basis by Origination Year, Prior	1,125,132
Financing Receivable, Revolving	42,785
Loans, Total	3,497,929	3,286,098
Commercial Real Estate - Non-Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	275,008
Term Loans Amortized Cost Basis by Origination Year, 2019	439,081
Term Loans Amortized Cost Basis by Origination Year, 2018	401,551
Term Loans Amortized Cost Basis by Origination Year, 2017	442,151
Term Loans Amortized Cost Basis by Origination Year, 2016	356,256
Term Loans Amortized Cost Basis by Origination Year, Prior	862,293
Financing Receivable, Revolving	24,467
Loans, Total	2,800,807
Commercial Real Estate - Non-Owner Occupied | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	27,599
Term Loans Amortized Cost Basis by Origination Year, 2019	104,352
Term Loans Amortized Cost Basis by Origination Year, 2018	97,973
Term Loans Amortized Cost Basis by Origination Year, 2017	71,618
Term Loans Amortized Cost Basis by Origination Year, 2016	107,934
Term Loans Amortized Cost Basis by Origination Year, Prior	259,591
Financing Receivable, Revolving	18,318
Loans, Total	687,385
Commercial Real Estate - Non-Owner Occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	6,464
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	25
Term Loans Amortized Cost Basis by Origination Year, Prior	3,248
Financing Receivable, Revolving	0
Loans, Total	9,737
Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	133,717
Term Loans Amortized Cost Basis by Origination Year, 2019	81,252
Term Loans Amortized Cost Basis by Origination Year, 2018	74,775
Term Loans Amortized Cost Basis by Origination Year, 2017	123,248
Term Loans Amortized Cost Basis by Origination Year, 2016	70,748
Term Loans Amortized Cost Basis by Origination Year, Prior	245,343
Financing Receivable, Revolving	2,499
Loans, Total	731,582	633,743
Multifamily Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	131,434
Term Loans Amortized Cost Basis by Origination Year, 2019	80,234
Term Loans Amortized Cost Basis by Origination Year, 2018	69,881
Term Loans Amortized Cost Basis by Origination Year, 2017	120,758
Term Loans Amortized Cost Basis by Origination Year, 2016	70,127
Term Loans Amortized Cost Basis by Origination Year, Prior	239,525
Financing Receivable, Revolving	2,499
Loans, Total	714,458
Multifamily Real Estate | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	2,283
Term Loans Amortized Cost Basis by Origination Year, 2019	1,018
Term Loans Amortized Cost Basis by Origination Year, 2018	4,894
Term Loans Amortized Cost Basis by Origination Year, 2017	2,490
Term Loans Amortized Cost Basis by Origination Year, 2016	621
Term Loans Amortized Cost Basis by Origination Year, Prior	5,427
Financing Receivable, Revolving	0
Loans, Total	16,733
Multifamily Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	391
Financing Receivable, Revolving	0
Loans, Total	391
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	1,984,327
Term Loans Amortized Cost Basis by Origination Year, 2019	431,718
Term Loans Amortized Cost Basis by Origination Year, 2018	238,702
Term Loans Amortized Cost Basis by Origination Year, 2017	84,026
Term Loans Amortized Cost Basis by Origination Year, 2016	81,938
Term Loans Amortized Cost Basis by Origination Year, Prior	158,845
Financing Receivable, Revolving	556,693
Loans, Total	3,536,249	2,114,033
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	1,979,209
Term Loans Amortized Cost Basis by Origination Year, 2019	401,385
Term Loans Amortized Cost Basis by Origination Year, 2018	221,417
Term Loans Amortized Cost Basis by Origination Year, 2017	79,734
Term Loans Amortized Cost Basis by Origination Year, 2016	76,145
Term Loans Amortized Cost Basis by Origination Year, Prior	149,692
Financing Receivable, Revolving	524,960
Loans, Total	3,432,542
Commercial and Industrial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	5,081
Term Loans Amortized Cost Basis by Origination Year, 2019	29,405
Term Loans Amortized Cost Basis by Origination Year, 2018	16,889
Term Loans Amortized Cost Basis by Origination Year, 2017	4,163
Term Loans Amortized Cost Basis by Origination Year, 2016	5,170
Term Loans Amortized Cost Basis by Origination Year, Prior	6,443
Financing Receivable, Revolving	28,156
Loans, Total	95,307
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	37
Term Loans Amortized Cost Basis by Origination Year, 2019	928
Term Loans Amortized Cost Basis by Origination Year, 2018	396
Term Loans Amortized Cost Basis by Origination Year, 2017	129
Term Loans Amortized Cost Basis by Origination Year, 2016	623
Term Loans Amortized Cost Basis by Origination Year, Prior	2,710
Financing Receivable, Revolving	3,577
Loans, Total	8,400
Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	79,875
Term Loans Amortized Cost Basis by Origination Year, 2019	106,354
Term Loans Amortized Cost Basis by Origination Year, 2018	85,295
Term Loans Amortized Cost Basis by Origination Year, 2017	93,757
Term Loans Amortized Cost Basis by Origination Year, 2016	81,889
Term Loans Amortized Cost Basis by Origination Year, Prior	248,035
Financing Receivable, Revolving	1,739
Loans, Total	696,944	724,337
Residential 1-4 Family - Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	78,631
Term Loans Amortized Cost Basis by Origination Year, 2019	100,919
Term Loans Amortized Cost Basis by Origination Year, 2018	76,284
Term Loans Amortized Cost Basis by Origination Year, 2017	87,277
Term Loans Amortized Cost Basis by Origination Year, 2016	76,710
Term Loans Amortized Cost Basis by Origination Year, Prior	226,118
Financing Receivable, Revolving	1,251
Loans, Total	647,190
Residential 1-4 Family - Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	592
Term Loans Amortized Cost Basis by Origination Year, 2019	4,625
Term Loans Amortized Cost Basis by Origination Year, 2018	8,739
Term Loans Amortized Cost Basis by Origination Year, 2017	4,420
Term Loans Amortized Cost Basis by Origination Year, 2016	4,186
Term Loans Amortized Cost Basis by Origination Year, Prior	15,798
Financing Receivable, Revolving	0
Loans, Total	38,360
Residential 1-4 Family - Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	652
Term Loans Amortized Cost Basis by Origination Year, 2019	810
Term Loans Amortized Cost Basis by Origination Year, 2018	272
Term Loans Amortized Cost Basis by Origination Year, 2017	2,060
Term Loans Amortized Cost Basis by Origination Year, 2016	993
Term Loans Amortized Cost Basis by Origination Year, Prior	6,119
Financing Receivable, Revolving	488
Loans, Total	11,394
Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	144,362
Term Loans Amortized Cost Basis by Origination Year, 2019	85,039
Term Loans Amortized Cost Basis by Origination Year, 2018	82,021
Term Loans Amortized Cost Basis by Origination Year, 2017	80,274
Term Loans Amortized Cost Basis by Origination Year, 2016	112,535
Term Loans Amortized Cost Basis by Origination Year, Prior	325,901
Financing Receivable, Revolving	12
Loans, Total	830,144	890,503
Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	11,456
Term Loans Amortized Cost Basis by Origination Year, 2019	4,196
Term Loans Amortized Cost Basis by Origination Year, 2018	2,019
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	958
Financing Receivable, Revolving	599,691
Loans, Total	618,320	659,504
Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	129,422
Term Loans Amortized Cost Basis by Origination Year, 2019	127,092
Term Loans Amortized Cost Basis by Origination Year, 2018	63,075
Term Loans Amortized Cost Basis by Origination Year, 2017	37,946
Term Loans Amortized Cost Basis by Origination Year, 2016	20,890
Term Loans Amortized Cost Basis by Origination Year, Prior	8,992
Financing Receivable, Revolving	0
Loans, Total	387,417	350,419
Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	26,595
Term Loans Amortized Cost Basis by Origination Year, 2019	79,525
Term Loans Amortized Cost Basis by Origination Year, 2018	80,848
Term Loans Amortized Cost Basis by Origination Year, 2017	25,975
Term Loans Amortized Cost Basis by Origination Year, 2016	11,234
Term Loans Amortized Cost Basis by Origination Year, Prior	18,318
Financing Receivable, Revolving	33,528
Loans, Total	276,023	372,853
Other Commercial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	221,823
Term Loans Amortized Cost Basis by Origination Year, 2019	115,346
Term Loans Amortized Cost Basis by Origination Year, 2018	10,593
Term Loans Amortized Cost Basis by Origination Year, 2017	40,854
Term Loans Amortized Cost Basis by Origination Year, 2016	17,529
Term Loans Amortized Cost Basis by Origination Year, Prior	56,209
Financing Receivable, Revolving	31,730
Loans, Total	494,084	287,279
Other Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	221,801
Term Loans Amortized Cost Basis by Origination Year, 2019	115,346
Term Loans Amortized Cost Basis by Origination Year, 2018	9,972
Term Loans Amortized Cost Basis by Origination Year, 2017	39,542
Term Loans Amortized Cost Basis by Origination Year, 2016	16,602
Term Loans Amortized Cost Basis by Origination Year, Prior	47,858
Financing Receivable, Revolving	31,730
Loans, Total	482,851
Other Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	22
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	621
Term Loans Amortized Cost Basis by Origination Year, 2017	1,312
Term Loans Amortized Cost Basis by Origination Year, 2016	927
Term Loans Amortized Cost Basis by Origination Year, Prior	8,351
Financing Receivable, Revolving	0
Loans, Total	11,233
Commercial Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	3,189,658
Term Loans Amortized Cost Basis by Origination Year, 2019	2,079,978
Term Loans Amortized Cost Basis by Origination Year, 2018	1,590,077
Term Loans Amortized Cost Basis by Origination Year, 2017	1,159,908
Term Loans Amortized Cost Basis by Origination Year, 2016	942,721
Term Loans Amortized Cost Basis by Origination Year, Prior	2,615,729
Financing Receivable, Revolving	693,240
Loans, Total	12,271,311
Commercial Portfolio | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	3,149,122
Term Loans Amortized Cost Basis by Origination Year, 2019	1,853,466
Term Loans Amortized Cost Basis by Origination Year, 2018	1,388,169
Term Loans Amortized Cost Basis by Origination Year, 2017	1,053,776
Term Loans Amortized Cost Basis by Origination Year, 2016	781,894
Term Loans Amortized Cost Basis by Origination Year, Prior	2,205,231
Financing Receivable, Revolving	638,158
Loans, Total	11,069,816
Commercial Portfolio | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	39,847
Term Loans Amortized Cost Basis by Origination Year, 2019	224,656
Term Loans Amortized Cost Basis by Origination Year, 2018	193,309
Term Loans Amortized Cost Basis by Origination Year, 2017	102,120
Term Loans Amortized Cost Basis by Origination Year, 2016	156,107
Term Loans Amortized Cost Basis by Origination Year, Prior	376,887
Financing Receivable, Revolving	50,718
Loans, Total	1,143,644
Commercial Portfolio | Substandard
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	689
Term Loans Amortized Cost Basis by Origination Year, 2019	1,856
Term Loans Amortized Cost Basis by Origination Year, 2018	8,599
Term Loans Amortized Cost Basis by Origination Year, 2017	4,012
Term Loans Amortized Cost Basis by Origination Year, 2016	4,720
Term Loans Amortized Cost Basis by Origination Year, Prior	33,611
Financing Receivable, Revolving	4,364
Loans, Total	57,851
Excluding Purchased Impaired
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		12,524,255
Excluding Purchased Impaired | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		12,142,328
Excluding Purchased Impaired | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		316,317
Excluding Purchased Impaired | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		65,252
Excluding Purchased Impaired | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		358
Excluding Purchased Impaired | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,239,980
Excluding Purchased Impaired | Construction and Land Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,197,066
Excluding Purchased Impaired | Construction and Land Development | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		37,182
Excluding Purchased Impaired | Construction and Land Development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		5,732
Excluding Purchased Impaired | Construction and Land Development | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2,013,805
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,916,492
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		87,004
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		10,309
Excluding Purchased Impaired | Commercial Real Estate - Owner Occupied | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		3,271,533
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		3,205,463
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		62,368
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		3,608
Excluding Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		94
Excluding Purchased Impaired | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		633,649
Excluding Purchased Impaired | Multifamily Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		613,844
Excluding Purchased Impaired | Multifamily Real Estate | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		19,396
Excluding Purchased Impaired | Multifamily Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		409
Excluding Purchased Impaired | Multifamily Real Estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2,112,454
Excluding Purchased Impaired | Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2,043,903
Excluding Purchased Impaired | Commercial and Industrial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		60,495
Excluding Purchased Impaired | Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		8,048
Excluding Purchased Impaired | Commercial and Industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		8
Excluding Purchased Impaired | Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		712,132
Excluding Purchased Impaired | Residential 1-4 Family - Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		680,894
Excluding Purchased Impaired | Residential 1-4 Family - Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		24,864
Excluding Purchased Impaired | Residential 1-4 Family - Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		6,374
Excluding Purchased Impaired | Residential 1-4 Family - Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		875,790
Excluding Purchased Impaired | Residential 1-4 Family - Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		841,408
Excluding Purchased Impaired | Residential 1-4 Family - Consumer | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		13,592
Excluding Purchased Impaired | Residential 1-4 Family - Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		20,534
Excluding Purchased Impaired | Residential 1-4 Family - Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		256
Excluding Purchased Impaired | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		655,377
Excluding Purchased Impaired | Residential 1-4 Family - Revolving | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		641,069
Excluding Purchased Impaired | Residential 1-4 Family - Revolving | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		6,373
Excluding Purchased Impaired | Residential 1-4 Family - Revolving | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		7,935
Excluding Purchased Impaired | Residential 1-4 Family - Revolving | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Auto
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		350,415
Excluding Purchased Impaired | Auto | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		345,960
Excluding Purchased Impaired | Auto | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2,630
Excluding Purchased Impaired | Auto | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,825
Excluding Purchased Impaired | Auto | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		372,185
Excluding Purchased Impaired | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		371,315
Excluding Purchased Impaired | Consumer | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		550
Excluding Purchased Impaired | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		320
Excluding Purchased Impaired | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Excluding Purchased Impaired | Other Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		286,935
Excluding Purchased Impaired | Other Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		284,914
Excluding Purchased Impaired | Other Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,863
Excluding Purchased Impaired | Other Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		158
Excluding Purchased Impaired | Other Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 68,800	86,681
Purchased Impaired | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		10,944
Purchased Impaired | Construction and Land Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,092
Purchased Impaired | Construction and Land Development | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		3,692
Purchased Impaired | Construction and Land Development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		6,160
Purchased Impaired | Construction and Land Development | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		27,438
Purchased Impaired | Commercial Real Estate - Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		8,264
Purchased Impaired | Commercial Real Estate - Owner Occupied | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		10,524
Purchased Impaired | Commercial Real Estate - Owner Occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		8,650
Purchased Impaired | Commercial Real Estate - Owner Occupied | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		14,565
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		3,826
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		9,415
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,324
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		94
Purchased Impaired | Multifamily Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Multifamily Real Estate | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		94
Purchased Impaired | Multifamily Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Multifamily Real Estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,579
Purchased Impaired | Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		127
Purchased Impaired | Commercial and Industrial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		25
Purchased Impaired | Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,427
Purchased Impaired | Commercial and Industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		12,205
Purchased Impaired | Residential 1-4 Family - Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		6,000
Purchased Impaired | Residential 1-4 Family - Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2,693
Purchased Impaired | Residential 1-4 Family - Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		3,512
Purchased Impaired | Residential 1-4 Family - Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		14,713
Purchased Impaired | Residential 1-4 Family - Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		9,947
Purchased Impaired | Residential 1-4 Family - Consumer | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		557
Purchased Impaired | Residential 1-4 Family - Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		4,209
Purchased Impaired | Residential 1-4 Family - Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		4,127
Purchased Impaired | Residential 1-4 Family - Revolving | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2,887
Purchased Impaired | Residential 1-4 Family - Revolving | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		707
Purchased Impaired | Residential 1-4 Family - Revolving | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		533
Purchased Impaired | Residential 1-4 Family - Revolving | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Auto
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		4
Purchased Impaired | Auto | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2
Purchased Impaired | Auto | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Auto | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		2
Purchased Impaired | Auto | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		668
Purchased Impaired | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		657
Purchased Impaired | Consumer | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		11
Purchased Impaired | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Other Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		344
Purchased Impaired | Other Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		120
Purchased Impaired | Other Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		224
Purchased Impaired | Other Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Other Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		0
Purchased Impaired | Commercial Portfolio
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		86,681
Purchased Impaired | Commercial Portfolio | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		32,922
Purchased Impaired | Commercial Portfolio | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		27,931
Purchased Impaired | Commercial Portfolio | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		25,828
Purchased Impaired | Commercial Portfolio | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		$ 0

LOANS AND ALLOWANCE FOR LOAN_12

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Based on Delinquency Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 14,383,215	$ 12,610,936
Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	239,217
Term Loans Amortized Cost Basis by Origination Year, 2019	414,412
Term Loans Amortized Cost Basis by Origination Year, 2018	345,850
Term Loans Amortized Cost Basis by Origination Year, 2017	42,072
Term Loans Amortized Cost Basis by Origination Year, 2016	50,171
Term Loans Amortized Cost Basis by Origination Year, Prior	84,149
Financing Receivable, Revolving	31,319
Loans, Total	1,207,190	1,250,924
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	228,092
Term Loans Amortized Cost Basis by Origination Year, 2019	387,463
Term Loans Amortized Cost Basis by Origination Year, 2018	328,874
Term Loans Amortized Cost Basis by Origination Year, 2017	262,182
Term Loans Amortized Cost Basis by Origination Year, 2016	176,231
Term Loans Amortized Cost Basis by Origination Year, Prior	698,016
Financing Receivable, Revolving	26,475
Loans, Total	2,107,333	2,041,243
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	302,607
Term Loans Amortized Cost Basis by Origination Year, 2019	543,433
Term Loans Amortized Cost Basis by Origination Year, 2018	505,988
Term Loans Amortized Cost Basis by Origination Year, 2017	513,769
Term Loans Amortized Cost Basis by Origination Year, 2016	464,215
Term Loans Amortized Cost Basis by Origination Year, Prior	1,125,132
Financing Receivable, Revolving	42,785
Loans, Total	3,497,929	3,286,098
Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	133,717
Term Loans Amortized Cost Basis by Origination Year, 2019	81,252
Term Loans Amortized Cost Basis by Origination Year, 2018	74,775
Term Loans Amortized Cost Basis by Origination Year, 2017	123,248
Term Loans Amortized Cost Basis by Origination Year, 2016	70,748
Term Loans Amortized Cost Basis by Origination Year, Prior	245,343
Financing Receivable, Revolving	2,499
Loans, Total	731,582	633,743
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	1,984,327
Term Loans Amortized Cost Basis by Origination Year, 2019	431,718
Term Loans Amortized Cost Basis by Origination Year, 2018	238,702
Term Loans Amortized Cost Basis by Origination Year, 2017	84,026
Term Loans Amortized Cost Basis by Origination Year, 2016	81,938
Term Loans Amortized Cost Basis by Origination Year, Prior	158,845
Financing Receivable, Revolving	556,693
Loans, Total	3,536,249	2,114,033
Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	79,875
Term Loans Amortized Cost Basis by Origination Year, 2019	106,354
Term Loans Amortized Cost Basis by Origination Year, 2018	85,295
Term Loans Amortized Cost Basis by Origination Year, 2017	93,757
Term Loans Amortized Cost Basis by Origination Year, 2016	81,889
Term Loans Amortized Cost Basis by Origination Year, Prior	248,035
Financing Receivable, Revolving	1,739
Loans, Total	696,944	724,337
Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	144,362
Term Loans Amortized Cost Basis by Origination Year, 2019	85,039
Term Loans Amortized Cost Basis by Origination Year, 2018	82,021
Term Loans Amortized Cost Basis by Origination Year, 2017	80,274
Term Loans Amortized Cost Basis by Origination Year, 2016	112,535
Term Loans Amortized Cost Basis by Origination Year, Prior	325,901
Financing Receivable, Revolving	12
Loans, Total	830,144	890,503
Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	11,456
Term Loans Amortized Cost Basis by Origination Year, 2019	4,196
Term Loans Amortized Cost Basis by Origination Year, 2018	2,019
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	958
Financing Receivable, Revolving	599,691
Loans, Total	618,320	659,504
Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	26,595
Term Loans Amortized Cost Basis by Origination Year, 2019	79,525
Term Loans Amortized Cost Basis by Origination Year, 2018	80,848
Term Loans Amortized Cost Basis by Origination Year, 2017	25,975
Term Loans Amortized Cost Basis by Origination Year, 2016	11,234
Term Loans Amortized Cost Basis by Origination Year, Prior	18,318
Financing Receivable, Revolving	33,528
Loans, Total	276,023	372,853
Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	129,422
Term Loans Amortized Cost Basis by Origination Year, 2019	127,092
Term Loans Amortized Cost Basis by Origination Year, 2018	63,075
Term Loans Amortized Cost Basis by Origination Year, 2017	37,946
Term Loans Amortized Cost Basis by Origination Year, 2016	20,890
Term Loans Amortized Cost Basis by Origination Year, Prior	8,992
Financing Receivable, Revolving	0
Loans, Total	387,417	350,419
Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	311,835
Term Loans Amortized Cost Basis by Origination Year, 2019	295,852
Term Loans Amortized Cost Basis by Origination Year, 2018	227,963
Term Loans Amortized Cost Basis by Origination Year, 2017	144,195
Term Loans Amortized Cost Basis by Origination Year, 2016	144,659
Term Loans Amortized Cost Basis by Origination Year, Prior	354,169
Financing Receivable, Revolving	633,231
Loans, Total	2,111,904
Purchased Impaired
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	68,800	86,681
Purchased Impaired | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		10,944
Purchased Impaired | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		27,438
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		14,565
Purchased Impaired | Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		94
Purchased Impaired | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		1,579
Purchased Impaired | Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		12,205
Purchased Impaired | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		14,713
Purchased Impaired | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		4,127
Purchased Impaired | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		668
Purchased Impaired | Auto
Financing Receivable, Recorded Investment [Line Items]
Loans, Total		$ 4
Current | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	143,716
Term Loans Amortized Cost Basis by Origination Year, 2019	83,309
Term Loans Amortized Cost Basis by Origination Year, 2018	78,957
Term Loans Amortized Cost Basis by Origination Year, 2017	77,910
Term Loans Amortized Cost Basis by Origination Year, 2016	111,043
Term Loans Amortized Cost Basis by Origination Year, Prior	311,108
Financing Receivable, Revolving	12
Loans, Total	806,055
Current | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	11,456
Term Loans Amortized Cost Basis by Origination Year, 2019	4,160
Term Loans Amortized Cost Basis by Origination Year, 2018	2,019
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	644
Financing Receivable, Revolving	590,291
Loans, Total	608,570
Current | Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	26,520
Term Loans Amortized Cost Basis by Origination Year, 2019	79,119
Term Loans Amortized Cost Basis by Origination Year, 2018	79,878
Term Loans Amortized Cost Basis by Origination Year, 2017	25,836
Term Loans Amortized Cost Basis by Origination Year, 2016	11,163
Term Loans Amortized Cost Basis by Origination Year, Prior	18,017
Financing Receivable, Revolving	33,296
Loans, Total	273,829
Current | Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	129,176
Term Loans Amortized Cost Basis by Origination Year, 2019	126,243
Term Loans Amortized Cost Basis by Origination Year, 2018	62,569
Term Loans Amortized Cost Basis by Origination Year, 2017	37,390
Term Loans Amortized Cost Basis by Origination Year, 2016	20,505
Term Loans Amortized Cost Basis by Origination Year, Prior	8,736
Financing Receivable, Revolving	0
Loans, Total	384,619
Current | Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	310,868
Term Loans Amortized Cost Basis by Origination Year, 2019	292,831
Term Loans Amortized Cost Basis by Origination Year, 2018	223,423
Term Loans Amortized Cost Basis by Origination Year, 2017	141,136
Term Loans Amortized Cost Basis by Origination Year, 2016	142,711
Term Loans Amortized Cost Basis by Origination Year, Prior	338,505
Financing Receivable, Revolving	623,599
Loans, Total	2,073,073
30-59 Days Past Due | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	156
Term Loans Amortized Cost Basis by Origination Year, 2018	1,648
Term Loans Amortized Cost Basis by Origination Year, 2017	43
Term Loans Amortized Cost Basis by Origination Year, 2016	263
Term Loans Amortized Cost Basis by Origination Year, Prior	888
Financing Receivable, Revolving	0
Loans, Total	2,998
30-59 Days Past Due | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	36
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	0
Financing Receivable, Revolving	2,633
Loans, Total	2,669
30-59 Days Past Due | Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	37
Term Loans Amortized Cost Basis by Origination Year, 2019	261
Term Loans Amortized Cost Basis by Origination Year, 2018	444
Term Loans Amortized Cost Basis by Origination Year, 2017	87
Term Loans Amortized Cost Basis by Origination Year, 2016	24
Term Loans Amortized Cost Basis by Origination Year, Prior	41
Financing Receivable, Revolving	126
Loans, Total	1,020
30-59 Days Past Due | Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	145
Term Loans Amortized Cost Basis by Origination Year, 2019	490
Term Loans Amortized Cost Basis by Origination Year, 2018	265
Term Loans Amortized Cost Basis by Origination Year, 2017	288
Term Loans Amortized Cost Basis by Origination Year, 2016	195
Term Loans Amortized Cost Basis by Origination Year, Prior	130
Financing Receivable, Revolving	0
Loans, Total	1,513
30-59 Days Past Due | Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	182
Term Loans Amortized Cost Basis by Origination Year, 2019	943
Term Loans Amortized Cost Basis by Origination Year, 2018	2,357
Term Loans Amortized Cost Basis by Origination Year, 2017	418
Term Loans Amortized Cost Basis by Origination Year, 2016	482
Term Loans Amortized Cost Basis by Origination Year, Prior	1,059
Financing Receivable, Revolving	2,759
Loans, Total	8,200
60-89 Days Past Due | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	708
Term Loans Amortized Cost Basis by Origination Year, 2017	1,138
Term Loans Amortized Cost Basis by Origination Year, 2016	67
Term Loans Amortized Cost Basis by Origination Year, Prior	2,063
Financing Receivable, Revolving	0
Loans, Total	3,976
60-89 Days Past Due | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	0
Financing Receivable, Revolving	1,141
Loans, Total	1,141
60-89 Days Past Due | Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	38
Term Loans Amortized Cost Basis by Origination Year, 2019	126
Term Loans Amortized Cost Basis by Origination Year, 2018	273
Term Loans Amortized Cost Basis by Origination Year, 2017	20
Term Loans Amortized Cost Basis by Origination Year, 2016	25
Term Loans Amortized Cost Basis by Origination Year, Prior	186
Financing Receivable, Revolving	104
Loans, Total	772
60-89 Days Past Due | Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	39
Term Loans Amortized Cost Basis by Origination Year, 2019	132
Term Loans Amortized Cost Basis by Origination Year, 2018	118
Term Loans Amortized Cost Basis by Origination Year, 2017	116
Term Loans Amortized Cost Basis by Origination Year, 2016	26
Term Loans Amortized Cost Basis by Origination Year, Prior	22
Financing Receivable, Revolving	0
Loans, Total	453
60-89 Days Past Due | Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	77
Term Loans Amortized Cost Basis by Origination Year, 2019	258
Term Loans Amortized Cost Basis by Origination Year, 2018	1,099
Term Loans Amortized Cost Basis by Origination Year, 2017	1,274
Term Loans Amortized Cost Basis by Origination Year, 2016	118
Term Loans Amortized Cost Basis by Origination Year, Prior	2,271
Financing Receivable, Revolving	1,245
Loans, Total	6,342
90+ Days Past Due | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	646
Term Loans Amortized Cost Basis by Origination Year, 2019	1,574
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	313
Term Loans Amortized Cost Basis by Origination Year, 2016	388
Term Loans Amortized Cost Basis by Origination Year, Prior	1,574
Financing Receivable, Revolving	0
Loans, Total	4,495
90+ Days Past Due | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	0
Financing Receivable, Revolving	2,276
Loans, Total	2,276
90+ Days Past Due | Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	19
Term Loans Amortized Cost Basis by Origination Year, 2018	253
Term Loans Amortized Cost Basis by Origination Year, 2017	32
Term Loans Amortized Cost Basis by Origination Year, 2016	21
Term Loans Amortized Cost Basis by Origination Year, Prior	0
Financing Receivable, Revolving	2
Loans, Total	327
90+ Days Past Due | Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	29
Term Loans Amortized Cost Basis by Origination Year, 2019	99
Term Loans Amortized Cost Basis by Origination Year, 2018	62
Term Loans Amortized Cost Basis by Origination Year, 2017	45
Term Loans Amortized Cost Basis by Origination Year, 2016	53
Term Loans Amortized Cost Basis by Origination Year, Prior	27
Financing Receivable, Revolving	0
Loans, Total	315
90+ Days Past Due | Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	675
Term Loans Amortized Cost Basis by Origination Year, 2019	1,692
Term Loans Amortized Cost Basis by Origination Year, 2018	315
Term Loans Amortized Cost Basis by Origination Year, 2017	390
Term Loans Amortized Cost Basis by Origination Year, 2016	462
Term Loans Amortized Cost Basis by Origination Year, Prior	1,601
Financing Receivable, Revolving	2,278
Loans, Total	7,413
Nonaccrual | Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	708
Term Loans Amortized Cost Basis by Origination Year, 2017	870
Term Loans Amortized Cost Basis by Origination Year, 2016	774
Term Loans Amortized Cost Basis by Origination Year, Prior	10,268
Financing Receivable, Revolving	0
Loans, Total	12,620
Nonaccrual | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	314
Financing Receivable, Revolving	3,350
Loans, Total	3,664
Nonaccrual | Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, 2018	0
Term Loans Amortized Cost Basis by Origination Year, 2017	0
Term Loans Amortized Cost Basis by Origination Year, 2016	1
Term Loans Amortized Cost Basis by Origination Year, Prior	74
Financing Receivable, Revolving	0
Loans, Total	75
Nonaccrual | Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	33
Term Loans Amortized Cost Basis by Origination Year, 2019	128
Term Loans Amortized Cost Basis by Origination Year, 2018	61
Term Loans Amortized Cost Basis by Origination Year, 2017	107
Term Loans Amortized Cost Basis by Origination Year, 2016	111
Term Loans Amortized Cost Basis by Origination Year, Prior	77
Financing Receivable, Revolving	0
Loans, Total	517
Nonaccrual | Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	33
Term Loans Amortized Cost Basis by Origination Year, 2019	128
Term Loans Amortized Cost Basis by Origination Year, 2018	769
Term Loans Amortized Cost Basis by Origination Year, 2017	977
Term Loans Amortized Cost Basis by Origination Year, 2016	886
Term Loans Amortized Cost Basis by Origination Year, Prior	10,733
Financing Receivable, Revolving	3,350
Loans, Total	$ 16,876

LOANS AND ALLOWANCE FOR LOAN_13

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Acquired Loan Portfolio and Accretable Yield) (Details) - Purchased Impaired $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Accretable Yield
Balance at beginning of period	$ 31,201
Additions	2,432
Accretion	(9,830)
Reclass of nonaccretable difference due to improvement in expected cash flows	1,372
Measurement period adjustment	2,629
Other, net	5,083
Balance at end of period	$ 32,887

INTANGIBLE ASSETS (Narrative) (

INTANGIBLE ASSETS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill or intangible assets	$ 0
Intangible assets, amortization expense	$ 4,053	$ 4,764	$ 12,676	$ 13,919
Core Deposits | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization period (years)			4 years
Core Deposits | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization period (years)			10 years
Other Amortizable Intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization period (years)			4 years
Other Amortizable Intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization period (years)			10 years

INTANGIBLE ASSETS (Estimated Re

INTANGIBLE ASSETS (Estimated Remaining Amortization Expense of Intangibles) (Details) $ in Thousands	Sep. 30, 2020USD ($)
Estimated Remaining Amortization of Intangibles
For the remaining three months of 2020	$ 3,883
2021	13,874
2022	11,490
2023	9,687
2024	7,819
Thereafter	14,315
Total estimated amortization expense	$ 61,068

LEASES (Narrative) (Details)

LEASES (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)lease	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Lessor Disclosure [Abstract]
Residual assets covered by residual value guarantees	$ 14,200,000		$ 14,200,000
Net Investment in Lease	146,500,000		146,500,000
Sales-type and direct financing leases, lease receivables	142,148,000		142,148,000
Sales-type and direct financing leases, unguaranteed residuals	4,400,000		4,400,000
Sales-type and direct financing leases, lease income	782,000	$ 0	1,100,000	$ 0
Lessee Disclosure [Abstract]
Operating lease, right-of-use asset	53,948,000		53,948,000		$ 54,941,000
Lease liabilities	64,757,000		64,757,000		$ 66,052,000
Lessee, operating lease, lease not yet commenced, amount	$ 0		$ 0
Sale leaseback transaction, number of transactions (transaction) | lease			0
Minimum
Lessor Disclosure [Abstract]
Lessor sales-type and direct financing lease, term of contract			31 months
Maximum
Lessor Disclosure [Abstract]
Lessor sales-type and direct financing lease, term of contract			125 months
Lessee Disclosure [Abstract]
Lessee, operating lease, remaining lease term (years)	25 years		25 years

LEASES (Lessee Lease Portfolio

LEASES (Lessee Lease Portfolio and Other Supplemental Lease Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Lessee, Operating Lease
Right-of-use assets	$ 53,948	$ 54,941
Lease liabilities	$ 64,757	$ 66,052
Weighted average remaining lease term (years)	7 years 4 months 28 days	7 years 4 months 9 days
Weighted average discount rate, percent	2.26%	2.69%
Lessee, Finance Lease
Right-of-use-assets	$ 7,654
Lease liabilities	$ 10,590
Weighted-average remaining lease term (years)	8 years 3 months 29 days
Weighted-average discount rate, percent	1.17%

LEASES (Other Lease Information

LEASES (Other Lease Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating Cash Flows from Finance Leases	$ 41
Operating Cash Flows from Operating Leases	10,398	$ 10,327
Right-of-use assets obtained in exchange for lease obligations, operating lease	7,566	$ 5,979
Right-of-use assets obtained in exchange for lease obligations, finance leases	$ 10,549

LEASES (Lease Cost Information)

LEASES (Lease Cost Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Net Operating Lease Cost	$ 2,536	$ 2,928	$ 8,383	$ 8,940
Finance Lease Cost: Amortization of right-of-use assets	230		306
Finance Lease Cost: Interest on lease liabilities	31		41
Total Lease Cost	$ 2,797	$ 2,928	$ 8,730	$ 8,940

LEASES (Maturities of Lessor an

LEASES (Maturities of Lessor and Lessee Arrangements Outstanding) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Lessor - Sales-type and Direct Financing Lease Maturities
For the remaining three months of 2020	$ 7,416
2021	28,883
2022	29,799
2023	28,136
2024	26,185
2025	17,780
Thereafter	13,594
Total undiscounted cash flows	151,793
Less: Adjustments	9,645
Total	142,148
Lessee - Operating Lease Maturities
For the remaining three months of 2020	3,193
2021	12,500
2022	11,289
2023	10,324
2024	9,007
2025	6,712
Thereafter	17,701
Total undiscounted cash flows	70,726
Less: Adjustments	5,969
Total	64,757	$ 66,052
Lessee - Finance Lease Maturities
For the remaining three months of 2020	0
2021	1,261
2022	1,292
2023	1,325
2024	1,358
2025	1,392
Thereafter	4,515
Total undiscounted cash flows	11,143
Less: Adjustments	553
Total	$ 10,590

BORROWINGS (Short-Term Borrowin

BORROWINGS (Short-Term Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 91,086	$ 66,053
Federal Funds Purchased	25,000	0
FHLB Advances	150,200	370,200
Total short-term borrowings	266,286	436,253
Average outstanding balance during the period	$ 223,068	$ 673,116
Average interest rate (during the period)	0.96%	2.30%
Average interest rate at end of period	0.25%	1.52%

BORROWINGS (Narrative) (Details

BORROWINGS (Narrative) (Details) - USD ($) $ in Thousands	Aug. 29, 2019	Feb. 01, 2019	Aug. 23, 2012	Sep. 30, 2020	Dec. 31, 2019
Subordinated Borrowing [Line Items]
Remaining available balance for the federal funds lines				$ 942,000	$ 682,000
Maximum collateral dependent line of credit with the FHLB				5,900,000	5,200,000
Remaining fair value discount on acquired notes				1,200
Prepayment penalty	$ 7,400		$ 19,600
Remaining borrowing capacity				25,000	25,000
Trust Preferred Capital Notes
Subordinated Borrowing [Line Items]
Remaining fair value discount on acquired notes				14,300
Long-term debt borrowings				155,159
Subordinated Debt
Subordinated Borrowing [Line Items]
Remaining fair value discount on acquired notes					$ 1,400
Long-term debt borrowings				158,500
PPPLF Advances
Subordinated Borrowing [Line Items]
Long-term debt borrowings				189,945
Remaining borrowing capacity				1,400,000
StellarOne Bank and Xenith [Member] | Trust Preferred Capital Notes
Subordinated Borrowing [Line Items]
Trust preferred capital notes principal balance				58,500
Trust preferred securities acquired				$ 87,000
Access National Bank
Subordinated Borrowing [Line Items]
Trust preferred capital notes principal balance		$ 5,000

BORROWINGS (Long-Term Borrowing

BORROWINGS (Long-Term Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 150,500	$ 150,500
FHLB Advances	560,000	780,000
Subordinated Debt	158,500	158,500
PPPLF Advances	189,945
Fair Value Premium (Discount)	(15,568)	(16,164)
Investment in Trust Preferred Capital Securities	4,659	4,659
Total Long-term Borrowings	1,048,036	1,077,495
Remaining issuance discount on debt	1,200
Remaining borrowing capacity	25,000	25,000
Trust Preferred Capital Notes
Debt Instrument [Line Items]
Remaining issuance discount on debt	14,300
Statutory Trust I
Debt Instrument [Line Items]
Trust Preferred Capital Securities	22,500	22,500
Investment in Trust Preferred Capital Securities	$ 696	$ 696
Rate	2.98%	4.66%
Maturity date	Jun. 17, 2034	Jun. 17, 2034
Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	2.75%	2.75%
Statutory Trust II
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 36,000	$ 36,000
Investment in Trust Preferred Capital Securities	$ 1,114	$ 1,114
Rate	1.63%	3.31%
Maturity date	Jun. 15, 2036	Jun. 15, 2036
Statutory Trust II | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	1.40%	1.40%
VFG Limited Liability Trust I Indenture
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 20,000	$ 20,000
Investment in Trust Preferred Capital Securities	$ 619	$ 619
Rate	2.96%	4.64%
Maturity date	Mar. 18, 2034	Mar. 18, 2034
VFG Limited Liability Trust I Indenture | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	2.73%	2.73%
FNB Statutory Trust II Indenture
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 12,000	$ 12,000
Investment in Trust Preferred Capital Securities	$ 372	$ 372
Rate	3.33%	5.01%
Maturity date	Jun. 26, 2033	Jun. 26, 2033
FNB Statutory Trust II Indenture | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	3.10%	3.10%
Gateway Capital Statutory Trust I
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 8,000	$ 8,000
Investment in Trust Preferred Capital Securities	$ 248	$ 248
Rate	3.33%	5.01%
Maturity date	Sep. 17, 2033	Sep. 17, 2033
Gateway Capital Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	3.10%	3.10%
Gateway Capital Statutory Trust II
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 7,000	$ 7,000
Investment in Trust Preferred Capital Securities	$ 217	$ 217
Rate	2.88%	4.56%
Maturity date	Jun. 17, 2034	Jun. 17, 2034
Gateway Capital Statutory Trust II | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	2.65%	2.65%
Gateway Capital Statutory Trust III
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 15,000	$ 15,000
Investment in Trust Preferred Capital Securities	$ 464	$ 464
Rate	1.73%	3.41%
Maturity date	May 30, 2036	May 30, 2036
Gateway Capital Statutory Trust III | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	1.50%	1.50%
Gateway Capital Statutory Trust IV
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 25,000	$ 25,000
Investment in Trust Preferred Capital Securities	$ 774	$ 774
Rate	1.78%	3.46%
Maturity date	Jul. 30, 2037	Jul. 30, 2037
Gateway Capital Statutory Trust IV | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	1.55%	1.55%
MFC Capital Trust II
Debt Instrument [Line Items]
Trust Preferred Capital Securities	$ 5,000	$ 5,000
Investment in Trust Preferred Capital Securities	$ 155	$ 155
Rate	3.08%	4.76%
Maturity date	Jan. 23, 2034	Jan. 23, 2034
MFC Capital Trust II | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	2.85%	2.85%
Subordinated Debt
Debt Instrument [Line Items]
Remaining issuance discount on debt		$ 1,400
2025 Subordinate Debt
Debt Instrument [Line Items]
Subordinated Debt	$ 8,500	$ 8,500
Rate	6.75%	6.75%
Maturity date	Jun. 30, 2025	Jun. 30, 2025
2026 Subordinate Debt
Debt Instrument [Line Items]
Subordinated Debt	$ 150,000	$ 150,000
Rate	5.00%	5.00%
Maturity date	Dec. 15, 2026	Dec. 15, 2026
2026 Subordinate Debt | LIBOR | Scenario, Plan [Member]
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	3.175%	3.175%
PPPLF Advances
Debt Instrument [Line Items]
Remaining borrowing capacity	$ 1,400,000
PPPLF Advance 4/8/2022
Debt Instrument [Line Items]
PPPLF Advances	$ 55,422
Rate	0.35%
Maturity date	Apr. 8, 2022
PPPLF Advance 4/11/2022
Debt Instrument [Line Items]
PPPLF Advances	$ 134,523
Rate	0.35%
Maturity date	Apr. 11, 2022
Adjustable Rate Credit One
Debt Instrument [Line Items]
FHLB Advances	$ 50,000	$ 50,000
Rate	0.85%	1.16%
Maturity date	Aug. 17, 2029	Aug. 17, 2029
Adjustable Rate Credit One | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR		(0.75%)
Adjustable Rate Credit Two
Debt Instrument [Line Items]
FHLB Advances	$ 150,000	$ 200,000
Rate		1.41%
Maturity date	May 22, 2029	May 15, 2024
Adjustable Rate Credit Two | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	(0.75%)	(0.50%)
Adjustable Rate Credit Three
Debt Instrument [Line Items]
FHLB Advances	$ 50,000	$ 150,000
Rate		1.16%
Maturity date	May 30, 2029	May 22, 2029
Adjustable Rate Credit Three | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	(0.75%)	(0.75%)
Adjustable Rate Credit Four
Debt Instrument [Line Items]
FHLB Advances	$ 100,000	$ 50,000
Rate		1.16%
Maturity date	Jun. 21, 2029	May 30, 2029
Adjustable Rate Credit Four | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR	(0.75%)	(0.75%)
Adjustable Rate Credit Five
Debt Instrument [Line Items]
FHLB Advances		$ 100,000
Rate		1.16%
Maturity date		Jun. 21, 2029
Adjustable Rate Credit Five | LIBOR
Debt Instrument [Line Items]
Spread to 3-Month LIBOR		(0.75%)
Fixed Rate Convertible
Debt Instrument [Line Items]
FHLB Advances	$ 200,000	$ 200,000
Rate	1.78%	1.78%
Maturity date	Oct. 26, 2028	Oct. 26, 2028
Fixed Rate Hybrid One
Debt Instrument [Line Items]
FHLB Advances		$ 20,000
Rate		1.58%
Maturity date		May 18, 2020
Fixed Rate Credit
Debt Instrument [Line Items]
FHLB Advances	$ 10,000	$ 10,000
Rate	1.54%	1.54%
Maturity date	Oct. 2, 2020	Oct. 2, 2020
Interest Rate Floor
Debt Instrument [Line Items]
FHLB interest rate	0.00%	0.00%

BORROWINGS (Contractual Maturit

BORROWINGS (Contractual Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Premium (Discount)
For the remaining three months of 2020	$ (238)
2021	(1,008)
2022	(1,030)
2023	(1,053)
2024	(1,078)
Thereafter	(11,161)
Total Long-term borrowings	(15,568)	$ (16,164)
Total Long-term Borrowings
For the remaining three months of 2020	9,762
2021	(1,008)
2022	188,915
2023	(1,053)
2024	(1,078)
Thereafter	852,498
Total Long-term Borrowings	1,048,036	$ 1,077,495
Trust Preferred Capital Notes
Total Long-term Borrowings, Gross
For the remaining three months of 2020	0
2021	0
2022	0
2023	0
2024	0
Thereafter	155,159
Total Long-term borrowings	155,159
Subordinated Debt
Total Long-term Borrowings, Gross
For the remaining three months of 2020	0
2021	0
2022	0
2023	0
2024	0
Thereafter	158,500
Total Long-term borrowings	158,500
PPPLF Advances
Total Long-term Borrowings, Gross
2022	189,945
Total Long-term borrowings	189,945
FHLB Advances
Total Long-term Borrowings, Gross
For the remaining three months of 2020	10,000
2021	0
2022	0
2023	0
2024	0
Thereafter	550,000
Total Long-term borrowings	$ 560,000

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Deposits with other financial institutions	$ 296.2
Uninsured deposits with other financial institutions	16.3
Reserve for Off-balance Sheet Activities
Off-balance sheet credit risks, amount, liability	14	$ 2.6
Cash Flow Hedging
Deposits with other financial institutions serves as collateral for cash flow hedge	$ 276.8

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES (Balances of Commitments and Contingencies) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Commitments with off-balance sheet risk:
Total commitments with off-balance sheet risk	$ 4,795,664	$ 4,900,930
Commitments to Extend Credit
Commitments with off-balance sheet risk:
Total commitments with off-balance sheet risk	4,631,361	4,691,272
Standby Letters of Credit
Commitments with off-balance sheet risk:
Total commitments with off-balance sheet risk	$ 164,303	$ 209,658

COMMITMENTS AND CONTINGENCIES_4

COMMITMENTS AND CONTINGENCIES (Schedule of Securities Pledged as Collateral) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	$ 276,786	$ 116,839
Loans	4,860,569	4,139,672
Total pledged assets	6,346,607	5,300,858
Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	767,599	733,995
Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	441,653	310,352
Public deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	0	0
Total pledged assets	908,958	759,362
Public deposits | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	476,167	467,266
Public deposits | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	432,791	292,096
Repurchase agreements
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	0	0
Total pledged assets	111,781	86,901
Repurchase agreements | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	111,781	79,299
Repurchase agreements | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	0	7,602
FHLB Advances
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	4,354,063	3,846,934
Total pledged assets	4,408,258	3,910,746
FHLB Advances | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	54,195	63,812
FHLB Advances | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	0	0
Fed Funds
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	316,561	292,738
Total pledged assets	316,561	292,738
Fed Funds | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	0	0
Fed Funds | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	0	0
Derivatives
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	276,786	116,839
Loans	0	0
Total pledged assets	277,725	118,099
Derivatives | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	939	1,260
Derivatives | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	0	0
Other purposes
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	0	0
Total pledged assets	133,379	133,012
Other purposes | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	124,517	122,358
Other purposes | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	8,862	$ 10,654
PPPLF Advances
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0
Loans	189,945
Total pledged assets	189,945
PPPLF Advances | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	0
PPPLF Advances | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	$ 0

DERIVATIVES (Narrative) (Detail

DERIVATIVES (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	$ 50,000
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Unrealized gain within accumulated other comprehensive income, to be reclassified into earnings	1,800
Derivative, amount	0
Fair Value Hedging
Derivatives, Fair Value [Line Items]
Aggregate notional amount of the hedged items	75,900	$ 83,100
Fair value of aggregate notional amount of the hedged items, unrealized loss	5,900	2,000
Loans
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	75,856	83,078
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	5,830	1,972
Available-for-sale Securities
Derivatives, Fair Value [Line Items]
Fair value of aggregate notional amount of the hedged items, unrealized loss	8,000	4,100
Carrying Amount of Hedged Asset/(Liabilities)	179,908	206,799
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	7,992	4,072
Available-for-sale Securities | Fair Value Hedging
Derivatives, Fair Value [Line Items]
Aggregate notional amount of the hedged items	50,000	50,000
Fair value of aggregate notional amount of the hedged items, unrealized loss	$ 8,000	$ 4,100

DERIVATIVES (Summary of the Der

DERIVATIVES (Summary of the Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Pay Fixed - Receive Floating Interest Rate Swaps | Not Designated as accounting hedges
Summary of the derivative designated as a cash flow hedge
Derivative, amount	$ 2,192,085	$ 1,575,149
Asset		753
Liabilities	187,299	53,592
Pay Floating - Receive Fixed Interest Rate Swaps | Not Designated as accounting hedges
Summary of the derivative designated as a cash flow hedge
Derivative, amount	2,192,085	1,575,149
Asset	187,299	53,592
Liabilities		753
Cash Flow Hedging
Summary of the derivative designated as a cash flow hedge
Derivative, amount	0
Cash Flow Hedging | Designated as accounting hedges
Summary of the derivative designated as a cash flow hedge
Derivative, amount	0	100,000
Asset	0	0
Liabilities	0	1,147
Fair Value Hedging | Designated as accounting hedges
Summary of the derivative designated as a cash flow hedge
Derivative, amount	125,856	133,078
Asset		182
Liabilities	$ 13,912	$ 6,256

DERIVATIVES (Summary of the Car

DERIVATIVES (Summary of the Carrying Value of the Company's Hedged Assets in Fair Value Hedges) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	$ 50,000
Portfolio, last-of-layer, amortized cost	180,000	$ 207,000
Fair Value Hedging
Derivative [Line Items]
Fair value of aggregate notional amount of the hedged items, unrealized loss	5,900	2,000
Available-for-sale Securities
Derivative [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	179,908	206,799
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	7,992	4,072
Fair value of aggregate notional amount of the hedged items, unrealized loss	8,000	4,100
Available-for-sale Securities | Fair Value Hedging
Derivative [Line Items]
Fair value of aggregate notional amount of the hedged items, unrealized loss	8,000	4,100
Loans
Derivative [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	75,856	83,078
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	$ 5,830	$ 1,972

STOCKHOLDERS' EQUITY (Narrative

STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	Jun. 09, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares authorized		500,000			500,000		500,000
Shares issued and sold			17,250
Preferred stock, par value (in dollars per share)		$ 10			$ 10
Preferred stock, shares outstanding		17,250			17,250		0
Net proceeds from issuance of preferred stock					$ 166,356	$ 0
Reclassifications of unrealized gains (losses) on AFS		$ 18		$ 7,104	$ 12,293	$ 7,306
Depositary Shares
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued and sold	6,900,000
Number of shares to be purchased upon the exercise of options	900,000
Preferred stock, liquidation preference (usd per share)	$ 25
Series A Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of preferred stock represented by each depositary share	The Series A preferred stock is represented by depositary shares, each representing a 1/400th ownership interest in a share of Series A preferred stock
Preferred stock, liquidation preference (usd per share)	$ 10,000
Preferred stock, par value (in dollars per share)	$ 10
Preferred stock, dividend rate					6.875%
Net proceeds from issuance of preferred stock	$ 166,400

STOCKHOLDERS' EQUITY (Change in

STOCKHOLDERS' EQUITY (Change in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,618,226	$ 2,425,450	$ 2,513,102	$ 2,512,295	$ 2,459,465	$ 1,924,581	$ 2,513,102	$ 1,924,581
Total stockholders' equity	2,618,226	2,618,226	2,425,450	2,525,031	2,512,295	2,459,465	2,513,102	2,525,031
Other comprehensive income (loss)	1,358	12,975	12,754	12,302	19,670	18,670	27,087	50,642
Ending balance	2,660,885	2,618,226	2,425,450	2,525,031	2,512,295	2,459,465	2,660,885	2,525,031
Unrealized Gains (Losses) on AFS Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	63,886		37,877	36,125		(5,949)	37,877	(5,949)
Total stockholders' equity	65,122	63,886	37,877	42,877	36,125	(5,949)	37,877	42,877
Other comprehensive income (loss) before reclassification	1,250			12,364			36,956	54,598
Amounts reclassified from AOCI into earnings	(14)			(5,612)			(9,711)	(5,772)
Other comprehensive income (loss)	1,236			6,752			27,245	48,826
Ending balance	65,122	63,886		42,877	36,125		65,122	42,877
Unrealized Gains (Losses) for AFS Securities Transferred to HTM
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	65		75	85		95	75	95
Total stockholders' equity	60	65	75	80	85	95	75	95
Other comprehensive income (loss) before reclassification	0			0			0	0
Amounts reclassified from AOCI into earnings	(5)			(5)			(15)	(15)
Other comprehensive income (loss)	(5)			(5)			(15)	(15)
Ending balance	60	65		80	85		60	80
Change in Fair Value of Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0		(782)	(7,155)		(3,393)	(782)	(3,393)
Total stockholders' equity	0	0	(782)	(972)	(7,155)	(3,393)	0	(972)
Other comprehensive income (loss) before reclassification	0			6,025			(699)	1,970
Amounts reclassified from AOCI into earnings	0			158			1,481	451
Other comprehensive income (loss)	0			6,183			782	2,421
Ending balance	0	0		(972)	(7,155)		0	(972)
Unrealized Gains (Losses) on BOLI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,647)		(1,595)	(988)		(1,026)	(1,595)	(1,026)
Total stockholders' equity	(2,520)	(2,647)	(1,595)	(1,616)	(988)	(1,026)	(2,520)	(1,026)
Other comprehensive income (loss) before reclassification	0			(647)			(1,289)	(647)
Amounts reclassified from AOCI into earnings	127			19			364	57
Other comprehensive income (loss)	127			(628)			(925)	(590)
Ending balance	(2,520)	(2,647)		(1,616)	(988)		(2,520)	(1,616)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	61,304	48,329	35,575	28,067	8,397	(10,273)	35,575	(10,273)
Total stockholders' equity	62,662	61,304	48,329	40,369	28,067	8,397	62,662	40,369
Other comprehensive income (loss) before reclassification	1,250			17,742			34,968	55,921
Amounts reclassified from AOCI into earnings	108			(5,440)			(7,881)	(5,279)
Other comprehensive income (loss)	1,358	12,975	12,754	12,302	19,670	18,670	27,087	50,642
Ending balance	$ 62,662	$ 61,304	$ 48,329	$ 40,369	$ 28,067	$ 8,397	$ 62,662	$ 40,369

FAIR VALUE MEASUREMENTS (Narrat

FAIR VALUE MEASUREMENTS (Narrative) (Details) item in Thousands, $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)item	Dec. 31, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Minimum number of market participants | item	4
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value | $	$ 14	$ 11.9

FAIR VALUE MEASUREMENTS (Schedu

FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Securities available for sale, at fair value	$ 2,443,340	$ 1,945,445
Loans held for sale, at fair value	52,607	55,405
Fair value hedges		182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Securities available for sale, at fair value	0	0
Loans held for sale, at fair value	0	0
Fair value hedges		0
LIABILITIES
Cash flow hedges		0
Fair value hedges	0	0
Significant Other Observable Inputs Level 2
ASSETS
Securities available for sale, at fair value	2,443,340	1,945,445
Loans held for sale, at fair value	52,607	55,405
Fair value hedges		182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Significant Unobservable Inputs Level 3
ASSETS
Securities available for sale, at fair value	0	0
Loans held for sale, at fair value	0	0
Fair value hedges		0
LIABILITIES
Cash flow hedges		0
Fair value hedges	0	0
Recurring
ASSETS
Loans held for sale, at fair value	52,607	55,405
Fair value hedges		182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Loans held for sale, at fair value	0	0
Fair value hedges		0
LIABILITIES
Cash flow hedges		0
Fair value hedges	0	0
Recurring | Significant Other Observable Inputs Level 2
ASSETS
Loans held for sale, at fair value	52,607	55,405
Fair value hedges		182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Recurring | Significant Unobservable Inputs Level 3
ASSETS
Loans held for sale, at fair value	0	0
Fair value hedges		0
LIABILITIES
Cash flow hedges		0
Fair value hedges	0	0
U.S. government and agency securities
ASSETS
Securities available for sale, at fair value	13,878	21,320
U.S. government and agency securities | Recurring
ASSETS
Securities available for sale, at fair value	13,878	21,320
U.S. government and agency securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Securities available for sale, at fair value	0
U.S. government and agency securities | Recurring | Significant Other Observable Inputs Level 2
ASSETS
Securities available for sale, at fair value	13,878	21,320
U.S. government and agency securities | Recurring | Significant Unobservable Inputs Level 3
ASSETS
Securities available for sale, at fair value	0
Obligations of states and political subdivisions
ASSETS
Securities available for sale, at fair value	796,856	447,091
Obligations of states and political subdivisions | Recurring
ASSETS
Securities available for sale, at fair value	796,856	447,091
Obligations of states and political subdivisions | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Securities available for sale, at fair value	0	0
Obligations of states and political subdivisions | Recurring | Significant Other Observable Inputs Level 2
ASSETS
Securities available for sale, at fair value	796,856	447,091
Obligations of states and political subdivisions | Recurring | Significant Unobservable Inputs Level 3
ASSETS
Securities available for sale, at fair value	0	0
Corporate and other bonds
ASSETS
Securities available for sale, at fair value	148,918	135,959
Corporate and other bonds | Recurring
ASSETS
Securities available for sale, at fair value	148,918	135,959
Corporate and other bonds | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Securities available for sale, at fair value	0	0
Corporate and other bonds | Recurring | Significant Other Observable Inputs Level 2
ASSETS
Securities available for sale, at fair value	148,918	135,959
Corporate and other bonds | Recurring | Significant Unobservable Inputs Level 3
ASSETS
Securities available for sale, at fair value	0	0
Total mortgage-back securities | Recurring
ASSETS
Securities available for sale, at fair value	1,482,067	1,337,996
Total mortgage-back securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Securities available for sale, at fair value	0	0
Total mortgage-back securities | Recurring | Significant Other Observable Inputs Level 2
ASSETS
Securities available for sale, at fair value	1,482,067	1,337,996
Total mortgage-back securities | Recurring | Significant Unobservable Inputs Level 3
ASSETS
Securities available for sale, at fair value	0	0
Other securities
ASSETS
Securities available for sale, at fair value	1,621	3,079
Other securities | Recurring
ASSETS
Securities available for sale, at fair value	1,621	3,079
Other securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Securities available for sale, at fair value	0	0
Other securities | Recurring | Significant Other Observable Inputs Level 2
ASSETS
Securities available for sale, at fair value	1,621	3,079
Other securities | Recurring | Significant Unobservable Inputs Level 3
ASSETS
Securities available for sale, at fair value	0	0
Interest Rate Swap
ASSETS
Interest rate swap	187,299	54,345
LIABILITIES
Interest rate swap	187,299	54,345
Interest Rate Swap | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Interest rate swap	0	0
LIABILITIES
Interest rate swap	0	0
Interest Rate Swap | Significant Other Observable Inputs Level 2
ASSETS
Interest rate swap	187,299	54,345
LIABILITIES
Interest rate swap	187,299	54,345
Interest Rate Swap | Significant Unobservable Inputs Level 3
ASSETS
Interest rate swap	0	0
LIABILITIES
Interest rate swap	0	0
Interest Rate Swap | Recurring
ASSETS
Interest rate swap	187,299	54,345
LIABILITIES
Interest rate swap	187,299	54,345
Interest Rate Swap | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Interest rate swap	0	0
LIABILITIES
Interest rate swap	0	0
Interest Rate Swap | Recurring | Significant Other Observable Inputs Level 2
ASSETS
Interest rate swap	187,299	54,345
LIABILITIES
Interest rate swap	187,299	54,345
Interest Rate Swap | Recurring | Significant Unobservable Inputs Level 3
ASSETS
Interest rate swap	0	0
LIABILITIES
Interest rate swap	$ 0	$ 0

FAIR VALUE MEASUREMENTS (Carryi

FAIR VALUE MEASUREMENTS (Carrying Values and Estimated Fair Values of the Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 520,966	$ 436,032
Securities available for sale, at fair value	2,443,340	1,945,445
HTM securities	614,173	603,503
Restricted stock	112,216	130,848
Loans held for sale, at fair value	52,607	55,405
Net loans	14,102,010	12,449,505
Derivatives:
Fair value hedges		182
Accrued interest receivable	71,475	52,721
Bank owned life insurance	325,538	322,917
LIABILITIES
Deposits	15,624,786	13,349,943
Borrowings	1,279,838	1,479,606
Accrued interest payable	5,126	6,108
Derivatives:
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Cash and cash equivalents	520,966	436,032
Securities available for sale, at fair value	0	0
HTM securities	0	0
Restricted stock	0	0
Loans held for sale, at fair value	0	0
Net loans	0	0
Derivatives:
Fair value hedges		0
Accrued interest receivable	0	0
Bank owned life insurance	0	0
LIABILITIES
Deposits	0	0
Borrowings	0	0
Accrued interest payable	0	0
Derivatives:
Cash flow hedges		0
Fair value hedges	0	0
Significant Other Observable Inputs Level 2
ASSETS
Cash and cash equivalents	0	0
Securities available for sale, at fair value	2,443,340	1,945,445
HTM securities	600,679	585,820
Restricted stock	112,216	130,848
Loans held for sale, at fair value	52,607	55,405
Net loans	0	0
Derivatives:
Fair value hedges		182
Accrued interest receivable	71,475	52,721
Bank owned life insurance	325,538	322,917
LIABILITIES
Deposits	15,624,786	13,349,943
Borrowings	1,279,838	1,479,606
Accrued interest payable	5,126	6,108
Derivatives:
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Significant Unobservable Inputs Level 3
ASSETS
Cash and cash equivalents	0	0
Securities available for sale, at fair value	0	0
HTM securities	13,494	17,683
Restricted stock	0	0
Loans held for sale, at fair value	0	0
Net loans	14,102,010	12,449,505
Derivatives:
Fair value hedges		0
Accrued interest receivable	0	0
Bank owned life insurance	0	0
LIABILITIES
Deposits	0	0
Borrowings	0	0
Accrued interest payable	0	0
Derivatives:
Cash flow hedges		0
Fair value hedges	0	0
Interest Rate Swap
Derivatives:
Interest rate swap	187,299	54,345
Derivatives:
Interest rate swap	187,299	54,345
Interest Rate Swap | Quoted Prices in Active Markets for Identical Assets Level 1
Derivatives:
Interest rate swap	0	0
Derivatives:
Interest rate swap	0	0
Interest Rate Swap | Significant Other Observable Inputs Level 2
Derivatives:
Interest rate swap	187,299	54,345
Derivatives:
Interest rate swap	187,299	54,345
Interest Rate Swap | Significant Unobservable Inputs Level 3
Derivatives:
Interest rate swap	0	0
Derivatives:
Interest rate swap	0	0
Carrying Value
ASSETS
Cash and cash equivalents	520,966	436,032
Securities available for sale, at fair value	2,443,340	1,945,445
HTM securities	546,661	555,144
Restricted stock	112,216	130,848
Loans held for sale, at fair value	52,607	55,405
Net loans	14,209,093	12,568,642
Derivatives:
Fair value hedges		182
Accrued interest receivable	71,475	52,721
Bank owned life insurance	325,538	322,917
LIABILITIES
Deposits	15,576,098	13,304,981
Borrowings	1,314,322	1,513,748
Accrued interest payable	5,126	6,108
Derivatives:
Cash flow hedges		1,147
Fair value hedges	13,912	6,256
Carrying Value | Interest Rate Swap
Derivatives:
Interest rate swap	187,299	54,345
Derivatives:
Interest rate swap	$ 187,299	$ 54,345

REVENUE (Disaggregation of Reve

REVENUE (Disaggregation of Revenue) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue
Mortgage banking income	$ 8,897,000	$ 3,374,000	$ 16,744,000	$ 7,614,000
Gains on securities transactions	18,000	7,104,000	12,293,000	7,306,000
Bank owned life insurance income	3,421,000	2,062,000	7,498,000	6,191,000
Loan-related interest rate swap fees	3,170,000	5,480,000	12,602,000	10,656,000
Other operating income	3,215,000	12,708,000	4,116,000	15,045,000
Total noninterest income	34,407,000	48,106,000	99,245,000	103,621,000
Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Other operating income	1,200,000	343,000	2,400,000	2,200,000
Overdraft fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	4,231,000	6,021,000	13,240,000	17,847,000
Maintenance fees & other | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	1,810,000	1,654,000	5,309,000	4,484,000
Other service charges, commissions and fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	1,621,000	1,513,000	4,600,000	4,879,000
Interchange fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	1,979,000	2,108,000	5,300,000	12,765,000
Trust asset management fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	2,729,000	2,661,000	8,026,000	5,977,000
Registered advisor management fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	2,224,000	2,219,000	6,402,000	7,919,000
Brokerage management fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	$ 1,092,000	1,202,000	$ 3,115,000	2,938,000
Xenith
Disaggregation of Revenue
Life insurance proceeds		$ 9,300,000		$ 9,300,000

EARNINGS PER SHARE (Narrative)

EARNINGS PER SHARE (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Earnings Per Share [Abstract]
Net proceeds from preferred stock	$ (7)	$ 166,363

EARNINGS PER SHARE (Reconciliat

EARNINGS PER SHARE (Reconciliation of the Denominators of the Basic and Diluted EPS Computations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Income:
Income from continuing operations	$ 61,000			$ 53,196			$ 98,798	$ 137,820
Income (loss) from discontinued operations	0			42			0	(128)
Net income	61,000	$ 30,709	$ 7,089	53,238	$ 48,823	$ 35,631	98,798	137,692
Preferred Stock Dividends	2,691						2,691
Net Income available to common shareholders	$ 58,309			$ 53,238			$ 96,107	$ 137,692
Weighted average shares outstanding, basic (in shares)	78,714,353			81,769,193			78,904,792	80,120,725
Dilutive effect of stock awards and warrants	11,000			64,000			16,000	63,000
Weighted average shares outstanding, diluted	78,725,346			81,832,868			78,921,108	80,183,113
Basic EPS:
EPS from continuing operations (dollar per share)	$ 0.74			$ 0.65			$ 1.22	$ 1.72
EPS from discontinued operations (dollar per share)	0			0			0	0
EPS available to common stockholders (dollar per share)	0.74			0.65			1.22	1.72
Diluted EPS:
EPS from continuing operations (dollar per share)	0.74			0.65			1.22	1.72
EPS from discontinued operations (dollar per share)	0			0			0	0
EPS available to common stockholders (dollar per share)	$ 0.74			$ 0.65			$ 1.22	$ 1.72

SEGMENT REPORTING & DISCONTIN_3

SEGMENT REPORTING & DISCONTINUED OPERATIONS (Narrative) (Details)	Dec. 31, 2019USD ($)
Segment Reporting [Abstract]
Assets of discontinued operations	$ 668,000
Liabilities of discontinued operations	$ 640,000

SEGMENT REPORTING & DISCONTIN_4

SEGMENT REPORTING & DISCONTINUED OPERATIONS (Information About Reportable Segments and Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net interest income	$ 137,381	$ 136,601	$ 409,694	$ 402,743
Provision for credit losses	6,558	9,100	100,954	18,192
Net interest income after provision for credit losses	130,823	127,501	308,740	384,551
Noninterest income	34,407	48,106	99,245	103,621
Income before income taxes	0	56	0	(173)
Income tax expense (benefit)	0	14	0	(45)
Income (loss) on discontinued operations	$ 0	42	$ 0	(128)
Mortgage | Discontinued Operations
Segment Reporting Information [Line Items]
Net interest income		0		0
Provision for credit losses		0		0
Net interest income after provision for credit losses		0		0
Noninterest income		0		1
Noninterest expenses		(56)		174
Income before income taxes		56		(173)
Income tax expense (benefit)		14		(45)
Income (loss) on discontinued operations		$ 42		$ (128)

SUBSEQUENT EVENTS (Narrative) (

SUBSEQUENT EVENTS (Narrative) (Details) - $ / shares	Oct. 29, 2020	Jun. 09, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Dividends on common stock (in dollars per share)			$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.23	$ 0.23	$ 0.75	$ 0.71
Dividends on preferred stock (in dollars per share)			$ 156.60
Subsequent Event
Subsequent Event [Line Items]
Dividends payable, date declared	Oct. 29, 2020
Common Stock, Class A | Subsequent Event
Subsequent Event [Line Items]
Dividends on common stock (in dollars per share)	$ 0.25
Dividends payable, date to be paid	Nov. 27, 2020
Dividends payable, date of record	Nov. 13, 2020
Depositary Shares | Subsequent Event
Subsequent Event [Line Items]
Dividends on preferred stock (in dollars per share)	$ 0.43
Series A Preferred Stock
Subsequent Event [Line Items]
Number of preferred stock represented by each depositary share		The Series A preferred stock is represented by depositary shares, each representing a 1/400th ownership interest in a share of Series A preferred stock
Series A Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Dividends on preferred stock (in dollars per share)	$ 171.88
Dividends payable, date to be paid	Dec. 1, 2020
Dividends payable, date of record	Nov. 16, 2020