Atlantic Union Bankshares (AUB) 10-Q 8 May 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	Apr. 30, 2020
Document and Entity Information [Abstract]
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	000-20293
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
Title of 12(b) Security	Common Stock, par value $1.33 per share
Trading Symbol	AUB
Security Exchange Name	NASDAQ
Document Period End Date	Mar. 31, 2020
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Fiscal Period Focus	Q1
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		78,709,196

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Cash and cash equivalents:
Cash and due from banks	$ 197,521,000	$ 163,050,000
Interest-bearing deposits in other banks	292,154,000	234,810,000
Federal funds sold	15,284,000	38,172,000
Total cash and cash equivalents	504,959,000	436,032,000
Securities available for sale, at fair value	1,972,903,000	1,945,445,000
Securities held to maturity, at carrying value	552,176,000	555,144,000
Restricted stock, at cost	130,227,000	130,848,000
Loans held for sale, at fair value	76,690,000	55,405,000
Loans held for investment, net of deferred fees and costs	12,768,841,000	12,610,936,000
Less allowance for loan losses	141,043,000	42,294,000
Total loans held for investment, net	12,627,798,000	12,568,642,000
Premises and equipment, net	161,139,000	161,073,000
Goodwill	935,560,000	935,560,000
Amortizable intangibles, net	69,298,000	73,669,000
Bank owned life insurance	324,980,000	322,917,000
Other assets	491,646,000	377,587,000
Assets of discontinued operations	0	668,000
Total assets	17,847,376,000	17,562,990,000
LIABILITIES
Noninterest-bearing demand deposits	3,067,573,000	2,970,139,000
Interest-bearing deposits	10,485,462,000	10,334,842,000
Total deposits	13,553,035,000	13,304,981,000
Securities sold under agreements to repurchase	56,781,000	66,053,000
Other short-term borrowings	380,000,000	370,200,000
Long-term borrowings	1,077,683,000	1,077,495,000
Other liabilities	354,427,000	230,519,000
Liabilities of discontinued operations	0	640,000
Total liabilities	15,421,926,000	15,049,888,000
Commitments and contingencies (Note 8)
STOCKHOLDERS' EQUITY
Common stock, $1.33 par value; shares authorized of 200,000,000 and 100,000,000 at March 31, 2020 and December 31, 2019, respectively; 78,710,448 and 80,001,185 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	104,086,000	105,827,000
Additional paid-in capital	1,743,429,000	1,790,305,000
Retained earnings	529,606,000	581,395,000
Accumulated other comprehensive income (loss)	48,329,000	35,575,000
Total stockholders' equity	2,425,450,000	2,513,102,000
Total liabilities and stockholders' equity	$ 17,847,376,000	$ 17,562,990,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1.33	$ 1.33
Common stock, shares authorized (in shares)	200,000,000	100,000,000
Common stock, shares issued (in shares)	78,710,448	80,001,185
Common stock, shares outstanding (in shares)	78,710,448	80,001,185

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest and dividend income:
Interest and fees on loans	$ 151,127	$ 144,115
Interest on deposits in other banks	862	473
Interest and dividends on securities:
Taxable	11,627	13,081
Nontaxable	7,709	7,983
Total interest and dividend income	171,325	165,652
Interest expense:
Interest on deposits	28,513	24,430
Interest on short-term borrowings	1,340	6,551
Interest on long-term borrowings	6,464	7,124
Total interest expense	36,317	38,105
Net interest income	135,008	127,547
Provision for credit losses	60,196	3,792
Net interest income after provision for credit losses	74,812	123,755
Noninterest income:
Mortgage banking income	2,022	1,454
Gains (losses) on securities transactions	1,936	151
Bank owned life insurance income	2,049	2,055
Loan-related interest rate swap fees	3,948	1,460
Other operating income	2,141	897
Total noninterest income	28,907	24,938
Noninterest expenses:
Salaries and benefits	50,117	48,007
Occupancy expenses	7,133	7,399
Furniture and equipment expenses	3,741	3,396
Printing, postage, and supplies	1,290	1,242
Technology and data processing	6,169	5,676
Professional services	3,307	2,958
Marketing and advertising expense	2,739	2,383
FDIC assessment premiums and other insurance	2,861	2,639
Other taxes	4,120	3,764
Loan-related expenses	2,697	2,289
OREO and credit-related expenses	688	684
Amortization of intangible assets	4,401	4,218
Training and other personnel costs	1,571	1,144
Merger-related costs	0	18,122
Rebranding expense	0	407
Other expenses	4,811	2,400
Total noninterest expenses	95,645	106,728
Income from continuing operations before income taxes	8,074	41,965
Income tax expense	985	6,249
Income from continuing operations	7,089	35,716
Discontinued operations:
Income (loss) from operations of discontinued mortgage segment	0	(115)
Income tax expense (benefit)	0	(30)
Net income (loss) on discontinued operations	0	(85)
Net income	$ 7,089	$ 35,631
Basic earnings per common share (in dollars per share)	$ 0.09	$ 0.47
Diluted earnings per common share (in dollars per share)	0.09	0.47
Dividends declared per common share (in dollars per share)	$ 0.25	$ 0.23
Basic weighted average number of common shares outstanding (in shares)	79,290,352	76,472,189
Diluted weighted average number of common shares outstanding (in shares)	79,317,382	76,533,066
Service charges on deposit accounts
Noninterest income:
Noninterest income	$ 7,578	$ 7,158
Other service charges, commissions and fees
Noninterest income:
Noninterest income	1,624	1,664
Interchange fees
Noninterest income:
Noninterest income	1,625	5,045
Fiduciary and asset management fees
Noninterest income:
Noninterest income	$ 5,984	$ 5,054

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Net income		$ 7,089	$ 35,631
Cash flow hedges:
Change in fair value of cash flow hedges		(699)	(1,460)
Reclassification adjustment for losses included in net income (net of tax, $416 and $32 for the three months ended March 31, 2020 and 2019, respectively)	[1]	1,481	120
AFS securities:
Unrealized holding gains arising during period (net of tax, $3,904 and $5,338 for the three months ended March 31, 2020 and 2019, respectively)		14,687	20,081
Reclassification adjustment for gains included in net income (net of tax, $407 and $23 for the three months ended March 31, 2020 and 2019, respectively) (2)	[2]	(1,529)	(85)
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 ended March 31, 2020 and 2019, respectively) (3)	[3]	(5)	(5)
Bank owned life insurance:
Unrealized holding gains (losses) arising during the period		(1,289)	0
Reclassification adjustment for losses included in net income (4)	[4]	108	19
Other comprehensive income (loss)		12,754	18,670
Comprehensive income		19,843	$ 54,301
Cash Flow Hedging
Bank owned life insurance:
Unrealized gain within accumulated other comprehensive income, to be reclassified into earnings		$ 1,800
[1]	The gross amounts reclassified into earnings for the three months ended March 31, 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 (losses) 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
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Tax expense (benefit) related to reclassification adjustment for losses included in net income	$ (394)	$ (32)
Tax expense (benefit) related to unrealized holding gains (losses) arising during period	3,904	5,338
Tax expense (benefit) related to gains on the sale of securities	407	23
Tax expense (benefit) related to unrealized gain for AFS securities transferred to HTM	$ 1	$ 1

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	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)
Impact of adoption of new guidance | Accounting Standards Update 2016-02			(1,133)		(1,133)
Stock-based compensation expense		1,870			1,870
Ending balance at Mar. 31, 2019	108,475	1,859,588	483,005	8,397	2,459,465
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)
Impact of adoption of new guidance | Accounting Standards Update 2016-13			(39,053)		(39,053)
Stock-based compensation expense		2,291			2,291
Ending balance at Mar. 31, 2020	$ 104,086	$ 1,743,429	$ 529,606	$ 48,329	$ 2,425,450

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Other comprehensive income (loss), tax	$ 3,890	$ 5,346
Issuance of Common Stock in regard to acquisition, shares		15,842,026
Dividends on common stock (in dollars per share)	$ 0.25	$ 0.23
Issuance of common stock under Equity Compensation Plan, shares	34,714	6,127
Stock purchased under stock repurchase plan, shares	1,493,472
Issuance of common stock for services rendered, shares	6,860	6,085
Vesting of restricted stock, net of shares held for taxes, under Equity Compensation Plans, shares	142,176	104,151

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net income	$ 7,089	$ 35,631
Adjustments to reconcile net income to net cash and cash equivalents provided by (used in) operating activities:
Depreciation of premises and equipment	3,831	3,638
Write-down of foreclosed properties and former bank premises	95	52
Amortization, net	6,164	4,780
Amortization (accretion) related to acquisition, net	(5,262)	(1,624)
Provision for credit losses	60,196	3,792
Gains on securities transactions, net	(1,936)	(151)
BOLI income	(2,049)	(2,055)
Decrease (increase) in loans held for sale, net	(21,285)	(7,485)
Losses (gains) on sales of foreclosed properties and former bank premises, net	141	47
Stock-based compensation expenses	2,291	1,870
Issuance of common stock for services	204	219
Net decrease (increase) in other assets	(111,854)	(17,681)
Net increase in other liabilities	110,731	(7,943)
Net cash and cash equivalents provided by (used in) operating activities	48,356	13,090
Investing activities:
Purchases of AFS securities and restricted stock	(208,318)	(146,193)
Purchases of HTM securities	0	(47,217)
Proceeds from sales of AFS securities and restricted stock	120,701	208,249
Proceeds from maturities, calls and paydowns of AFS securities	81,240	53,439
Proceeds from maturities, calls and paydowns of HTM securities	2,042	1,320
Net increase in loans held for investment	(150,890)	(81,391)
Net increase in premises and equipment	(3,994)	(1,460)
Proceeds from sales of foreclosed properties and former bank premises	2,095	171
Cash paid in acquisitions	0	(12)
Cash acquired in acquisitions	0	46,164
Net cash and cash equivalents provided by (used in) investing activities	(157,124)	33,070
Financing activities:
Net increase in noninterest-bearing deposits	97,434	185,099
Net increase in interest-bearing deposits	150,670	106,490
Net increase (decrease) in short-term borrowings	528	(295,008)
Cash dividends paid - common stock	(19,825)	(18,838)
Repurchase of common stock	(49,879)	0
Issuance of common stock	777	138
Vesting of restricted stock, net of shares held for taxes	(2,010)	(1,647)
Net cash and cash equivalents provided by (used in) financing activities	177,695	(23,766)
Increase (decrease) in cash and cash equivalents	68,927	22,394
Cash and cash equivalents at beginning of the period	436,032	261,199
Cash and cash equivalents at end of the period	504,959	283,593
Cash payments for:
Interest	34,755	34,871
Income taxes	0	0
Supplemental schedule of noncash investing and financing activities
Transfers from loans (foreclosed properties) to foreclosed properties (loans)	$ 615	900
Issuance of common stock in exchange for net assets in acquisition		499,974
Transactions related to acquisitions
Assets acquired		2,858,048
Liabilities assumed		$ 2,558,638

ACCOUNTING POLICIES

ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 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 149 branches and approximately 170 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., Dixon, Hubard, Feinour, & Brown, Inc., and Middleburg Investment Services, LLC, which provide investment advisory and/or brokerage services; and Union Insurance Group, LLC, which offers various lines of insurance products. 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. The CARES Act, as well as other interagency guidance, provide enhanced guidelines and accounting for COVID-19 related modifications. 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. 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 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. 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, 2020. ​ The Company’s adoption of ASC 326 resulted in a change in the accounting and reporting related to PCI loans which are now defined as PCD and evaluated at the loan level instead of being evaluated in pools under PCI accounting. 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 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 recognized. ​ The following table illustrates the impact of ASC 326. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ALLL. 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 rates 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. Management also considers qualitative factors when estimating loan losses to take into account model limitations. 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 is 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. 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 $31.1 million on loans held for investment and, $5.2 million on HTM securities at March 31, 2020 and is included in “Other Assets” on the Company’s consolidated balance sheet. ​ 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 . The difference between the fair value and unpaid principal balance of the loan at acquisition date (premium or discount) is amortized or accreted into interest income over the life of the loans. If the acquired performing loan has revolving privileges, it is accounted for using the straight-line method; otherwise, the effective interest method is used. ​ PCD loans reflect loans that have experienced more-than-insignificant credit deterioration since origination. These PCD loans are accounted for under ASC 326 . Credit risk characteristics include risk rating groups, nonaccrual status, and past due status. For valuation purposes, these pools are further disaggregated by maturity, pricing characteristics, and re-payment structure. ​ 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. Subsequent changes to the ALLL are recorded through provision expense. ​ The PCD loans are and will continue to be subject to the Company’s internal and external credit review and monitoring. ​ ​ Allowance for Credit Losses on HTM Securities The Company evaluates the credit risk of its 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 March 31, 2020. ​ Allowance for Credit Losses on AFS Securities 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 is influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, and others. There is currently no ACL held against the Company’s AFS securities portfolio at March 31, 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. ​ Business Combinations and Divestitures On February 1, 2019, the Company completed the acquisition of Access. Refer to the Note 2 “Acquisitions” for additional information. ​ Goodwill and Intangible Assets The Company has an aggregate goodwill balance of $935.6 million associated with previous merger transactions, which is primarily associated with commercial and consumer banking. ​ Goodwill resulting from business combinations prior to January 1, 2009 represents the excess of the purchase price over the fair value of the net assets of businesses acquired. Goodwill resulting from business combinations after January 1, 2009 is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exists that indicate that a goodwill impairment test should be performed. The Company has selected April 30th as the date to perform the annual impairment test. The Company performed its annual goodwill impairment testing as of April 30, 2019 and determined that there was no impairment to its goodwill. ​ The Company performed an interim impairment review as of March 31, 2020 and considered various factors including, the results of the prior year impairment test, the Company’s most recent forecasts, and the Company’s recent stock price movements, and concluded that no impairment existed as of the balance sheet date. ​ Intangible assets with definite useful lives are amortized over their estimated useful lives, which range from 4 to 10 years , to their estimated residual values. Goodwill is the only intangible asset with an indefinite life included on the Company’s Consolidated Balance Sheets. ​ Long-lived assets, including purchased intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented on the Company's Consolidated Balance Sheets and reported at the lower of the carrying amount or fair value less costs to sell, would no longer depreciated. Management performed a review of impairment through March 31, 2020, and concluded no impairment of these assets existed as of the balance sheet date.

ACQUISITIONS

ACQUISITIONS	3 Months Ended
	Mar. 31, 2020
Business Combinations [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 January of 2020. Merger-related costs associated with the acquisition of Access were $0 and $17.8 million for the three months ended March 31, 2020 and 2019, 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	3 Months Ended
	Mar. 31, 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 March 31, 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, and all AFS securities were current with no securities past due or on non-accrual as March 31, 2020. ​ The amortized cost, gross unrealized gains and losses, and estimated fair values of AFS securities as of March 31, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated ​ Cost Gains (Losses) Fair Value March 31, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 17,631 ​ $ 365 ​ $ (34) ​ $ 17,962 Obligations of states and political subdivisions ​ 515,914 ​ 31,367 ​ (555) ​ 546,726 Corporate and other bonds (1) ​ 122,232 ​ 2,185 ​ (3,449) ​ 120,968 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 353,684 ​ ​ 13,819 ​ ​ (56) ​ ​ 367,447 Residential ​ ​ 887,762 ​ ​ 33,820 ​ ​ (4,872) ​ ​ 916,710 Total mortgage-backed securities ​ ​ 1,241,446 ​ ​ 47,639 ​ ​ (4,928) ​ ​ 1,284,157 Other securities ​ 3,090 ​ — ​ — ​ 3,090 Total AFS securities ​ $ 1,900,313 ​ $ 81,556 ​ $ (8,966) ​ $ 1,972,903 (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 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 416,904 ​ ​ 8,786 ​ ​ (643) ​ ​ 425,047 Residential ​ ​ 896,609 ​ ​ 17,156 ​ ​ (816) ​ ​ 912,949 Total mortgage-backed securities ​ ​ 1,313,513 ​ ​ 25,942 ​ ​ (1,459) ​ ​ 1,337,996 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 March 31, 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 March 31, 2020 ​ ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 5,338 ​ $ (23) ​ $ 1,619 ​ $ (11) ​ $ 6,957 ​ ​ (34) Obligations of states and political subdivisions ​ ​ 24,757 ​ ​ (555) ​ ​ — ​ ​ — ​ ​ 24,757 ​ $ (555) Corporate and other bonds (1) ​ 40,409 ​ (2,854) ​ 19,922 ​ (595) ​ 60,331 ​ (3,449) Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 14,667 ​ ​ (56) ​ ​ — ​ ​ — ​ ​ 14,667 ​ ​ (56) Residential ​ ​ 135,577 ​ ​ (4,436) ​ ​ 14,880 ​ ​ (436) ​ ​ 150,457 ​ ​ (4,872) Total mortgage-backed securities ​ ​ 150,244 ​ ​ (4,492) ​ ​ 14,880 ​ ​ (436) ​ ​ 165,124 ​ ​ (4,928) Total AFS securities ​ $ 220,748 ​ $ (7,924) ​ $ 36,421 ​ $ (1,042) ​ $ 257,169 ​ $ (8,966) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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) Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 54,714 ​ ​ (554) ​ ​ 14,966 ​ ​ (89) ​ ​ 69,680 ​ ​ (643) Residential ​ ​ 114,147 ​ ​ (500) ​ ​ 40,168 ​ ​ (316) ​ ​ 154,315 ​ ​ (816) Total mortgage-backed securities ​ ​ 168,861 ​ ​ (1,054) ​ ​ 55,134 ​ ​ (405) ​ ​ 223,995 ​ ​ (1,459) Total AFS securities ​ $ 198,348 ​ $ (1,204) ​ $ 75,035 ​ $ (696) ​ $ 273,383 ​ $ (1,900) (1) Other bonds includes asset-backed securities. ​ As of March 31, 2020, there were $36.4 million, or 20 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 $1.0 million. 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 determined the securities that were in an unrealized loss position with no allowance for credit loss as of March 31, 2020 and December 31, 2019 were based on the reasons set out below: ​ Obligations of state and political subdivisions. This category’s unrealized losses are primarily the result of market volatility. The majority of the securities are of high credit quality (rated A- or higher) and the issuers continue to make timely principal and interest payments on the bonds. 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. 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. ​ Corporate and other bonds. This category’s unrealized losses are the result of market volatility. The majority of these securities remain investment grade and the Company’s analysis did not indicate the existence of a credit loss. 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. 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, which may be maturity. ​ Mortgage-backed securities . The majority of these securities are of high credit quality (rated A or higher) or 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 issuers continue to make timely principal and interest payments. Current market volatility has caused certain securities to experience a non-credit related decline in value. The majority of the securities in an unrealized loss position are guaranteed with implicit and explicit government guarantees associated. In addition, the Company does not intend to sell the investments before recovery of their amortized cost, which may be maturity. ​ The Company’s mortgage-backed securities portfolio includes non-agency collateralized mortgage obligations with a fair value of $40.6 million which had unrealized losses of approximately $1.3 million at March 31, 2020. These non-agency mortgage-backed securities were generally rated AAA or equivalent at purchase and generally received a 20% SSFA rating. The Company does not intend to sell 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 their amortized cost basis, which may be maturity. The issuer(s) continues to make timely principal and interest payments. As such, the Company does not consider these investments to have credit related impairment as of March 31, 2020. ​ The following table presents the amortized cost of AFS securities as of March 31, 2020 by security type and credit rating (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2020 ​ U.S. Government and Agency Obligations of states and political Corporate and Mortgage-backed Other Total AFS ​ ​ securities ​ subdivisions ​ other bonds ​ securities ​ securities ​ securities Credit Rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ AAA/AA/A ​ $ 2,497 ​ $ 514,374 ​ $ 32,288 ​ $ 38,859 ​ $ — ​ $ 588,018 BBB/BB/B ​ — ​ 1,033 ​ 22,853 ​ ​ — ​ — ​ 23,886 Not Rated - Agency (1) ​ ​ 15,134 ​ ​ — ​ ​ — ​ ​ 1,153,495 ​ ​ 1,608 ​ ​ 1,170,237 Not Rated - Non-Agency ​ ​ — ​ ​ 507 ​ ​ 67,091 ​ ​ 49,092 ​ ​ 1,482 ​ ​ 118,172 Total ​ $ 17,631 ​ $ 515,914 ​ $ 122,232 ​ $ 1,241,446 ​ $ 3,090 ​ $ 1,900,313 (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 AFS securities as of March 31, 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). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 ​ Amortized Estimated Amortized Estimated ​ ​ Cost ​ Fair Value ​ Cost ​ Fair Value Due in one year or less ​ $ 24,916 ​ $ 25,080 ​ $ 35,177 ​ $ 35,329 Due after one year through five years ​ 157,141 ​ 162,774 ​ 164,605 ​ 166,873 Due after five years through ten years ​ 221,929 ​ 228,121 ​ 249,713 ​ 254,790 Due after ten years ​ 1,496,327 ​ 1,556,928 ​ 1,443,932 ​ 1,488,453 Total AFS securities ​ $ 1,900,313 ​ $ 1,972,903 ​ $ 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 March 31, 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 March 31, 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 March 31, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Gross Unrealized ​ Estimated ​ Value Gains (Losses) ​ Fair Value March 31, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 2,797 ​ $ — ​ $ (69) ​ $ 2,728 Obligations of states and political subdivisions ​ ​ 543,517 ​ ​ 52,815 ​ ​ — ​ ​ 596,332 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 5,862 ​ ​ — ​ ​ (142) ​ ​ 5,720 Residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total mortgage-backed securities ​ ​ 5,862 ​ ​ — ​ ​ (142) ​ ​ 5,720 Total held-to-maturity securities ​ $ 552,176 ​ $ 52,815 ​ $ (211) ​ $ 604,780 ​ 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 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 7,183 ​ ​ 59 ​ ​ — ​ ​ 7,242 Residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total 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 at March 31, 2020 and concluded no additional reserve was needed at March 31, 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 credit risk HTM securities are obligations of states and political subdivisions. ​ The following table presents the amortized cost of HTM securities as of March 31, 2020 by security type and credit rating (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2020 ​ U.S. Government and Agency Obligations of states and political Mortgage-backed ​ Total HTM ​ ​ securities ​ subdivisions ​ securities ​ securities Credit Rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ AAA/AA/A ​ $ — ​ $ 536,747 ​ $ — ​ $ 536,747 Not Rated - Agency (1) ​ ​ 2,797 ​ ​ — ​ ​ 5,862 ​ ​ 8,659 Not Rated - Non-Agency ​ ​ — ​ 6,770 ​ ​ — ​ ​ 6,770 Total ​ $ 2,797 ​ $ 543,517 ​ $ 5,862 ​ $ 552,176 (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 March 31, 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). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 ​ Carrying Estimated Carrying Estimated ​ ​ Value ​ Fair Value ​ Value ​ Fair Value Due in one year or less ​ $ — ​ $ — ​ $ 502 ​ $ 504 Due after one year through five years ​ 10,198 ​ 10,411 ​ 10,258 ​ 10,539 Due after five years through ten years ​ 1,760 ​ 1,767 ​ 1,768 ​ 1,800 Due after ten years ​ 540,218 ​ 592,602 ​ 542,616 ​ 590,660 Total HTM securities ​ $ 552,176 ​ $ 604,780 ​ $ 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 March 31, 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 March 31, 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 March 31, 2020 and December 31, 2019. Restricted equity securities consist of Federal Reserve Bank stock in the amount of $67.0 million for both March 31, 2020 and December 31, 2019 and FHLB stock in the amount of $63.2 million and $63.9 million as of March 31, 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 months ended March 31, 2020 and 2019 (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Three Months Ended ​ ​ March 31, 2020 ​ March 31, 2019 Realized gains (losses): ​ ​ Gross realized gains ​ $ 2,164 ​ $ 1,213 Gross realized losses ​ (228) ​ (1,062) Net realized gains ​ $ 1,936 ​ $ 151 ​ ​ ​ ​ ​ ​ ​ Proceeds from sales of securities ​ $ 120,701 ​ $ 208,249 ​ ​

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	3 Months Ended
	Mar. 31, 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 March 31, 2020 is in accordance with ASC 326. All loan information presented prior to March 31, 2020 is in accordance with previous applicable GAAP. ​ The Company’s loans are stated at their face amount, net of deferred fees and costs, and consist of the following at March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 Construction and Land Development ​ $ 1,318,252 ​ $ 1,250,924 Commercial Real Estate - Owner Occupied ​ 2,051,904 ​ 2,041,243 Commercial Real Estate - Non-Owner Occupied ​ 3,328,012 ​ 3,286,098 Multifamily Real Estate ​ 679,390 ​ 633,743 Commercial & Industrial ​ 2,177,932 ​ 2,114,033 Residential 1-4 Family - Commercial ​ 721,800 ​ 724,337 Residential 1-4 Family - Consumer ​ 854,550 ​ 890,503 Residential 1-4 Family - Revolving ​ 652,135 ​ 659,504 Auto ​ 358,039 ​ 350,419 Consumer ​ 352,572 ​ 372,853 Other Commercial ​ 274,255 ​ 287,279 Total loans held for investment, net ​ $ 12,768,841 ​ $ 12,610,936 ​ ​ The following table shows the aging of the Company’s loan portfolio, by class, at March 31, 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 ​ $ 1,311,599 ​ $ 2,786 ​ $ 316 ​ $ 317 ​ $ 3,234 ​ $ 1,318,252 Commercial Real Estate - Owner Occupied ​ 2,026,741 ​ 10,779 ​ 1,444 ​ 1,690 ​ 11,250 ​ 2,051,904 Commercial Real Estate - Non-Owner Occupied ​ 3,319,481 ​ 2,087 ​ 2,765 ​ 2,037 ​ 1,642 ​ 3,328,012 Multifamily Real Estate ​ 676,343 ​ 623 ​ 1,994 ​ 377 ​ 53 ​ 679,390 Commercial & Industrial ​ 2,167,873 ​ 4,893 ​ 1,218 ​ 517 ​ 3,431 ​ 2,177,932 Residential 1-4 Family - Commercial ​ 708,772 ​ 4,145 ​ 1,066 ​ 777 ​ 7,040 ​ 721,800 Residential 1-4 Family - Consumer ​ 820,818 ​ 15,667 ​ 570 ​ 4,407 ​ 13,088 ​ 854,550 Residential 1-4 Family - Revolving ​ 640,989 ​ 4,308 ​ 1,286 ​ 2,005 ​ 3,547 ​ 652,135 Auto ​ 355,084 ​ 1,967 ​ 311 ​ 127 ​ 550 ​ 358,039 Consumer ​ 348,953 ​ 1,612 ​ 1,294 ​ 622 ​ 91 ​ 352,572 Other Commercial ​ ​ 273,090 ​ ​ 1 ​ ​ 1,068 ​ ​ — ​ ​ 96 ​ ​ 274,255 Total loans held for investment ​ $ 12,649,743 ​ $ 48,868 ​ $ 13,332 ​ $ 12,876 ​ $ 44,022 ​ $ 12,768,841 ​ ​ ​ 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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonaccrual ​ ​ ​ ​ ​ ​ ​ ​ January 1, 2020 ​ March 31, 2020 ​ Nonaccrual With No ALLL ​ 90 Days and still Accruing Construction and Land Development ​ $ 4,060 ​ $ 3,234 ​ $ 1,985 ​ $ 317 Commercial Real Estate - Owner Occupied ​ ​ 13,889 ​ ​ 11,250 ​ ​ 3,591 ​ ​ 1,690 Commercial Real Estate - Non-Owner Occupied ​ ​ 1,368 ​ ​ 1,642 ​ ​ — ​ ​ 2,037 Multifamily Real Estate ​ ​ — ​ ​ 53 ​ ​ — ​ ​ 377 Commercial & Industrial ​ ​ 3,037 ​ ​ 3,431 ​ ​ 93 ​ ​ 517 Residential 1-4 Family - Commercial ​ ​ 6,492 ​ ​ 7,040 ​ ​ 1,739 ​ ​ 777 Residential 1-4 Family - Consumer ​ ​ 13,117 ​ ​ 13,088 ​ ​ 1,069 ​ ​ 4,407 Residential 1-4 Family - Revolving ​ ​ 2,490 ​ ​ 3,547 ​ ​ 60 ​ ​ 2,005 Auto ​ ​ 565 ​ ​ 550 ​ ​ — ​ ​ 127 Consumer ​ ​ 88 ​ ​ 91 ​ ​ — ​ ​ 622 Other Commercial ​ ​ 98 ​ ​ 96 ​ ​ — ​ ​ — Total loans held for investment ​ $ 45,204 ​ $ 44,022 ​ $ 8,537 ​ $ 12,876 ​ ​ There was no interest income recognized on nonaccrual loans during the three months ended March 31, 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 ​ As of March 31, 2020, the Company has TDRs totaling $20.4 million with an estimated $1.9 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 months ended March 31, 2020, the recorded investment in TDRs prior to modifications was not materially impacted by the modifications. ​ 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. 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. During the quarter ended March 31, 2020, the Company had made loan modifications of this nature totaling approximately $75 million. 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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ No. of Recorded Outstanding ​ ​ Loans ​ Investment ​ Commitment Performing ​ ​ Construction and Land Development 4 ​ $ 226 ​ $ — Commercial Real Estate - Owner Occupied 6 ​ 2,223 ​ — Commercial Real Estate - Non-Owner Occupied 1 ​ 1,089 ​ — Commercial & Industrial 4 ​ 995 ​ — Residential 1-4 Family - Commercial 5 ​ 287 ​ — Residential 1-4 Family - Consumer 74 ​ 9,502 ​ — Residential 1-4 Family - Revolving 2 ​ 55 ​ — Consumer 4 ​ 26 ​ — Other Commercial ​ 1 ​ ​ 462 ​ ​ — Total performing 101 ​ $ 14,865 ​ $ — Nonperforming ​ ​ Commercial Real Estate - Owner Occupied 2 ​ $ 172 ​ $ — Commercial & Industrial 1 ​ 517 ​ — Residential 1-4 Family - Consumer 22 ​ 4,747 ​ — Residential 1-4 Family - Revolving 2 ​ 55 ​ — Total nonperforming 27 ​ $ 5,491 ​ $ — Total performing and nonperforming 128 ​ $ 20,356 ​ $ — ​ ​ 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 months ended March 31, 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 months ended March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended March 31, 2020 ​ ​ Recorded ​ ​ No. of ​ Investment at ​ ​ 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 ​ $ 517 Total loan term extended at a market rate 1 ​ $ 517 ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ Construction and Land Development ​ 1 ​ $ 35 Residential 1-4 Family - Consumer 10 ​ 1,763 Total loan term extended at a below market rate 11 ​ $ 1,798 ​ ​ ​ ​ ​ ​ Interest rate modification, below market rate ​ Total interest only at below market rate of interest — ​ $ — ​ ​ ​ ​ ​ ​ Total 12 ​ $ 2,315 ​ ​ 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 months ended March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2020 ​ ​ Commercial ​ Consumer ​ Total Balance, beginning of year ​ $ 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 ASC 326 adoption ​ 6,184 ​ 41,300 ​ 47,484 Loans charged-off ​ (2,968) ​ (4,183) ​ (7,151) Recoveries credited to allowance ​ 1,154 ​ 1,006 ​ 2,160 Provision charged to operations ​ 42,532 ​ 13,724 ​ 56,256 Balance, end of period ​ $ 77,843 ​ $ 63,200 ​ $ 141,043 ​ ​ ​ 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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total ​ Converted to Term Construction and Land Development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 69,552 ​ $ 467,635 ​ $ 434,210 ​ $ 132,703 ​ $ 53,894 ​ $ 81,829 ​ $ 30,573 ​ $ 1,270,396 ​ $ — Watch & Special Mention ​ ​ 1,200 ​ ​ 8,607 ​ ​ 1,566 ​ ​ 865 ​ ​ 6,615 ​ ​ 15,627 ​ ​ 1,848 ​ ​ 36,328 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ 732 ​ ​ 736 ​ ​ 2,405 ​ ​ 7,655 ​ ​ — ​ ​ 11,528 ​ ​ — Total Construction and Land Development ​ $ 70,752 ​ $ 476,242 ​ $ 436,508 ​ $ 134,304 ​ $ 62,914 ​ $ 105,111 ​ $ 32,421 ​ $ 1,318,252 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 79,743 ​ $ 391,157 ​ $ 312,340 ​ $ 266,525 ​ $ 147,239 ​ $ 681,938 ​ $ 37,492 ​ $ 1,916,434 ​ $ — Watch & Special Mention ​ ​ — ​ ​ 5,726 ​ ​ 16,831 ​ ​ 15,683 ​ ​ 25,211 ​ ​ 47,288 ​ ​ 3,551 ​ ​ 114,290 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ 1,115 ​ ​ 1,333 ​ ​ 2,730 ​ ​ 15,628 ​ ​ 374 ​ ​ 21,180 ​ ​ — Total Commercial Real Estate - Owner Occupied ​ $ 79,743 ​ $ 396,883 ​ $ 330,286 ​ $ 283,541 ​ $ 175,180 ​ $ 744,854 ​ $ 41,417 ​ $ 2,051,904 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Non-Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 100,998 ​ $ 501,212 ​ $ 490,930 ​ $ 472,440 ​ $ 480,363 ​ $ 1,159,966 ​ $ 44,949 ​ $ 3,250,858 ​ $ — Watch & Special Mention ​ ​ — ​ ​ 1,061 ​ ​ 8,838 ​ ​ 13,449 ​ ​ 16,707 ​ ​ 29,450 ​ ​ 838 ​ ​ 70,343 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ 164 ​ ​ — ​ ​ 25 ​ ​ 6,330 ​ ​ 200 ​ ​ 6,719 ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 92 ​ ​ 92 ​ ​ — Total Commercial Real Estate - Non-Owner Occupied ​ $ 100,998 ​ $ 502,273 ​ $ 499,932 ​ $ 485,889 ​ $ 497,095 ​ $ 1,195,746 ​ $ 46,079 ​ $ 3,328,012 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial & Industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 127,407 ​ $ 445,967 ​ $ 280,399 ​ $ 90,466 ​ $ 90,219 ​ $ 176,554 ​ $ 894,146 ​ $ 2,105,158 ​ $ 353 Watch & Special Mention ​ ​ 457 ​ ​ 3,817 ​ ​ 7,987 ​ ​ 1,520 ​ ​ 3,900 ​ ​ 4,367 ​ ​ 40,039 ​ ​ 62,087 ​ ​ 49 Substandard ​ ​ — ​ ​ 505 ​ ​ 1,015 ​ ​ 253 ​ ​ 900 ​ ​ 3,222 ​ ​ 4,792 ​ ​ 10,687 ​ ​ — Total Commercial & Industrial ​ $ 127,864 ​ $ 450,289 ​ $ 289,401 ​ $ 92,239 ​ $ 95,019 ​ $ 184,143 ​ $ 938,977 ​ $ 2,177,932 ​ $ 402 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multifamily Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 60,276 ​ $ 78,954 ​ $ 63,329 ​ $ 129,106 ​ $ 64,831 ​ $ 254,868 ​ $ 7,286 ​ $ 658,650 ​ $ — Watch & Special Mention ​ ​ — ​ ​ — ​ ​ — ​ ​ 8,286 ​ ​ 1,134 ​ ​ 10,551 ​ ​ 339 ​ ​ 20,310 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 430 ​ ​ — ​ ​ 430 ​ ​ — Total Multifamily Real Estate ​ $ 60,276 ​ $ 78,954 ​ $ 63,329 ​ $ 137,392 ​ $ 65,965 ​ $ 265,849 ​ $ 7,625 ​ $ 679,390 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 29,989 ​ $ 112,509 ​ $ 79,932 ​ $ 104,116 ​ $ 86,412 ​ $ 264,081 ​ $ 1,911 ​ $ 678,950 ​ $ 810 Watch & Special Mention ​ ​ 880 ​ ​ 2,720 ​ ​ 8,378 ​ ​ 3,617 ​ ​ 2,159 ​ ​ 13,689 ​ ​ — ​ ​ 31,443 ​ ​ 2,762 Substandard ​ ​ — ​ ​ — ​ ​ 310 ​ ​ 632 ​ ​ 1,846 ​ ​ 8,002 ​ ​ 617 ​ ​ 11,407 ​ ​ 76 Total Residential 1-4 Family - Commercial ​ $ 30,869 ​ $ 115,229 ​ $ 88,620 ​ $ 108,365 ​ $ 90,417 ​ $ 285,772 ​ $ 2,528 ​ $ 721,800 ​ $ 3,648 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,468 ​ $ 116,582 ​ $ 9,904 ​ $ 43,520 ​ $ 17,802 ​ $ 59,403 ​ $ 19,049 ​ $ 267,728 ​ $ — Watch & Special Mention ​ ​ — ​ ​ — ​ ​ 636 ​ ​ 1,337 ​ ​ — ​ ​ 4,344 ​ ​ 54 ​ ​ 6,371 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ 60 ​ ​ — ​ ​ 96 ​ ​ — ​ ​ 156 ​ ​ — Total Other Commercial ​ $ 1,468 ​ $ 116,582 ​ $ 10,540 ​ $ 44,917 ​ $ 17,802 ​ $ 63,843 ​ $ 19,103 ​ $ 274,255 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 469,433 ​ $ 2,114,016 ​ $ 1,671,044 ​ $ 1,238,876 ​ $ 940,760 ​ $ 2,678,639 ​ $ 1,035,406 ​ $ 10,148,174 ​ $ 1,163 Watch & Special Mention ​ ​ 2,537 ​ ​ 21,931 ​ ​ 44,236 ​ ​ 44,757 ​ ​ 55,726 ​ ​ 125,316 ​ ​ 46,669 ​ ​ 341,172 ​ ​ 2,811 Substandard ​ ​ — ​ ​ 505 ​ ​ 3,336 ​ ​ 3,014 ​ ​ 7,906 ​ ​ 41,363 ​ ​ 5,983 ​ ​ 62,107 ​ ​ 76 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 92 ​ ​ 92 ​ ​ — Total Commercial ​ $ 471,970 ​ $ 2,136,452 ​ $ 1,718,616 ​ $ 1,286,647 ​ $ 1,004,392 ​ $ 2,845,318 ​ $ 1,088,150 ​ $ 10,551,545 ​ $ 4,050 ​ 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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total ​ Converted to Term Residential 1-4 Family - Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 21,273 ​ $ 95,266 ​ $ 105,226 ​ $ 99,655 ​ $ 129,032 ​ $ 370,353 ​ $ 13 ​ $ 820,818 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 1,268 ​ ​ 1,537 ​ ​ 2,566 ​ ​ 453 ​ ​ 9,843 ​ ​ — ​ ​ 15,667 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ 109 ​ ​ 77 ​ ​ — ​ ​ 384 ​ ​ — ​ ​ 570 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 728 ​ ​ 125 ​ ​ 445 ​ ​ 276 ​ ​ 2,833 ​ ​ — ​ ​ 4,407 ​ ​ — Nonaccrual ​ ​ — ​ ​ — ​ ​ 888 ​ ​ 891 ​ ​ 797 ​ ​ 10,512 ​ ​ — ​ ​ 13,088 ​ ​ — Total Residential 1-4 Family - Consumer ​ $ 21,273 ​ $ 97,262 ​ $ 107,885 ​ $ 103,634 ​ $ 130,558 ​ $ 393,925 ​ $ 13 ​ $ 854,550 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 6,463 ​ $ 7,732 ​ $ 2,641 ​ $ 21 ​ $ — ​ $ 661 ​ $ 623,471 ​ $ 640,989 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 49 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 4,259 ​ ​ 4,308 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,286 ​ ​ 1,286 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,005 ​ ​ 2,005 ​ ​ — Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 314 ​ ​ 3,233 ​ ​ 3,547 ​ ​ — Total Residential 1-4 Family - Revolving ​ $ 6,463 ​ $ 7,781 ​ $ 2,641 ​ $ 21 ​ $ — ​ $ 975 ​ $ 634,254 ​ $ 652,135 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 25,016 ​ $ 106,175 ​ $ 110,825 ​ $ 34,857 ​ $ 14,995 ​ $ 20,293 ​ $ 36,792 ​ $ 348,953 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 329 ​ ​ 692 ​ ​ 198 ​ ​ 11 ​ ​ 342 ​ ​ 40 ​ ​ 1,612 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ 193 ​ ​ 699 ​ ​ 84 ​ ​ 28 ​ ​ 288 ​ ​ 2 ​ ​ 1,294 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 139 ​ ​ 368 ​ ​ 94 ​ ​ 13 ​ ​ — ​ ​ 8 ​ ​ 622 ​ ​ — Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ 88 ​ ​ — ​ ​ 91 ​ ​ — Total Consumer ​ $ 25,016 ​ $ 106,836 ​ $ 112,584 ​ $ 35,233 ​ $ 15,050 ​ $ 21,011 ​ $ 36,842 ​ $ 352,572 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Auto ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 35,381 ​ $ 149,149 ​ $ 77,698 ​ $ 48,701 ​ $ 28,777 ​ $ 15,378 ​ $ — ​ $ 355,084 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 463 ​ ​ 528 ​ ​ 447 ​ ​ 347 ​ ​ 182 ​ ​ — ​ ​ 1,967 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ 63 ​ ​ 52 ​ ​ 92 ​ ​ 40 ​ ​ 64 ​ ​ — ​ ​ 311 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 77 ​ ​ 24 ​ ​ 12 ​ ​ — ​ ​ 14 ​ ​ — ​ ​ 127 ​ ​ — Nonaccrual ​ ​ — ​ ​ 117 ​ ​ 81 ​ ​ 106 ​ ​ 148 ​ ​ 98 ​ ​ — ​ ​ 550 ​ ​ — Total Auto ​ $ 35,381 ​ $ 149,869 ​ $ 78,383 ​ $ 49,358 ​ $ 29,312 ​ $ 15,736 ​ $ — ​ $ 358,039 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 88,133 ​ $ 358,322 ​ $ 296,390 ​ $ 183,234 ​ $ 172,804 ​ $ 406,685 ​ $ 660,276 ​ $ 2,165,844 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 2,109 ​ ​ 2,757 ​ ​ 3,211 ​ ​ 811 ​ ​ 10,367 ​ ​ 4,299 ​ ​ 23,554 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ 256 ​ ​ 860 ​ ​ 253 ​ ​ 68 ​ ​ 736 ​ ​ 1,288 ​ ​ 3,461 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 944 ​ ​ 517 ​ ​ 551 ​ ​ 289 ​ ​ 2,847 ​ ​ 2,013 ​ ​ 7,161 ​ ​ — Nonaccrual ​ ​ — ​ ​ 117 ​ ​ 969 ​ ​ 997 ​ ​ 948 ​ ​ 11,012 ​ ​ 3,233 ​ ​ 17,276 ​ ​ — Total Consumer ​ $ 88,133 ​ $ 361,748 ​ $ 301,493 ​ $ 188,246 ​ $ 174,920 ​ $ 431,647 ​ $ 671,109 ​ $ 2,217,296 ​ $ — ​ 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 March 31, 2020, the amortized cost of the Company’s PCD loans totaled $84.7 million, which had an estimated ALLL of $3.8 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 months ended March 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, 2019 ​ ​ ​ Interest ​ ​ Average ​ Income ​ ​ Investment ​ Recognized Construction and Land Development ​ $ 9,425 ​ $ 39 Commercial Real Estate - Owner Occupied ​ 11,554 ​ 105 Commercial Real Estate - Non-Owner Occupied ​ 6,956 ​ 59 Commercial & Industrial ​ 2,224 ​ 14 Residential 1-4 Family - Commercial ​ 6,475 ​ 32 Residential 1-4 Family - Consumer ​ 18,257 ​ 114 Residential 1-4 Family - Revolving ​ 3,472 ​ 40 Auto ​ 600 ​ — Consumer ​ 215 ​ 2 Other Commercial ​ ​ 588 ​ ​ 8 Total impaired loans ​ $ 59,766 ​ $ 413 ​ 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 months ended March 31, 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 months ended March 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended March 31, 2019 ​ ​ Recorded ​ ​ No. of ​ Investment at ​ ​ 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 ​ $ 441 Residential 1-4 Family - Commercial 1 ​ 75 Residential 1-4 Family - Consumer 2 ​ 263 Consumer 1 ​ 10 Total loan term extended at a market rate 5 ​ $ 789 ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ Residential 1-4 Family - Consumer 5 ​ $ 937 Consumer ​ 1 ​ ​ 6 Total loan term extended at a below market rate 6 ​ $ 943 ​ ​ ​ ​ ​ ​ Total 11 ​ $ 1,732 ​ ​ ​ ​ ​ ​ ​ Allowance for Loan and Lease Losses The following table shows the ALLL activity by class for the three months ended March 31, 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): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2019 ​ ​ Allowance for loan and lease 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 ​ $ 27 ​ $ (732) ​ $ 126 ​ $ 6,224 Commercial Real Estate - Owner Occupied ​ 4,023 ​ 25 ​ (47) ​ 29 ​ 4,030 Commercial Real Estate - Non-Owner Occupied ​ 8,865 ​ 89 ​ — ​ 82 ​ 9,036 Multifamily Real Estate ​ 649 ​ 85 ​ — ​ (74) ​ 660 Commercial & Industrial ​ 7,636 ​ 360 ​ (980) ​ 395 ​ 7,411 Residential 1-4 Family - Commercial ​ 1,692 ​ 87 ​ (66) ​ 47 ​ 1,760 Residential 1-4 Family - Consumer ​ 1,492 ​ 155 ​ (32) ​ 117 ​ 1,732 Residential 1-4 Family - Revolving ​ 1,297 ​ 87 ​ (216) ​ 238 ​ 1,406 Auto ​ 1,443 ​ 186 ​ (399) ​ 216 ​ 1,446 Consumer and all other (1) ​ 7,145 ​ 595 ​ (3,467) ​ 2,849 ​ 7,122 Total ​ $ 41,045 ​ $ 1,696 ​ $ (5,939) ​ $ 4,025 ​ $ 40,827 (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 ​ 3,0

INTANGIBLE ASSETS

INTANGIBLE ASSETS	3 Months Ended
	Mar. 31, 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. Amortization expense of intangibles for the three months ended March 31, 2020 and 2019 totaled $4.4 million and $4.2 million, respectively. As of March 31, 2020, the estimated remaining amortization expense of intangibles is as follows for the years ending (dollars in thousands): ​ ​ ​ ​ For the remaining nine months of 2020 $ 12,113 2021 ​ ​ 13,874 2022 ​ ​ 11,490 2023 ​ ​ 9,687 2024 ​ ​ 7,818 Thereafter ​ ​ 14,316 Total estimated amortization expense ​ $ 69,298 ​ ​ ​ ​ ​ ​ ​

LEASES

LEASES	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
LEASES	6. LEASES The Company leases branch locations, office space, land, and equipment. The Company determines if an arrangement is a lease at inception. At March 31, 2020 all leases were classified as operating leases with approximately 160 non-cancellable operating leases where the Company is the lessee. The Company does not have any material arrangements where the Company is the lessor or in a sublease contract. Leases where the Company is a lessee are primarily for real estate leases with remaining lease terms of up to 14 years . The Company’s real estate lease agreements do not contain residual value guarantees and most agreements do not contain restrictive covenants. Operating leases have been reported on the Company’s Consolidated Balance Sheets as an operating ROU Asset within “Other Assets” and an operating lease liability within “Other Liabilities.” The ROU Asset represents the Company’s right to use an underlying asset over the course of the lease term and operating lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating 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. The operating ROU Asset is 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. At March 31, 2020 and December 31, 2019, the total ROU Asset were $53.6 million and $54.9 million, respectively, and total operating lease liabilities were $64.2 million and $66.1 million, respectively. Most of the Company’s leases include one or more options to renew, however, the Company is not reasonably certain to exercise those options and therefore does not include the renewal options in the measurement of the ROU Asset and lease liabilities. Total lease expenses are recorded in Occupancy Expense within noninterest expense on the Company’s Consolidated Statements of Income. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Total operating lease expenses for the three months ended March 31, 2020 and 2019, were $2.9 million and $3.2 million, respectively. As of March 31, 2020, the Company had no material operating leases that have not yet commenced that create significant rights and obligations, and no material sales leaseback transactions. Maturities of operating lease liabilities as of March 31, 2020 are as follows for the years ending (dollars in thousands): ​ ​ ​ ​ For the remaining nine months of 2020 $ 9,714 2021 ​ 11,523 2022 ​ 10,545 2023 ​ 9,561 2024 ​ 8,232 2025 ​ ​ 6,040 Thereafter ​ 15,088 Total future lease payments ​ 70,703 Less: Interest ​ 6,533 Present value of lease liabilities ​ $ 64,171 ​ Other lease information is as follows as of March 31, 2020 and December 31, 2019 and for the three months ended March 31, 2020 and 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 ​ Lease Term and Discount Rate of Operating leases: ​ ​ ​ ​ ​ ​ Weighted-average remaining lease term (years) ​ 7.20 ​ ​ ​ 7.36 ​ Weighted-average discount rate (1) ​ 2.56 % ​ ​ 2.69 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ Cash paid for amounts included in measurement of lease liabilities: 2020 ​ ​ 2019 ​ Operating Cash Flows from Operating Leases ​ $ 3,517 ​ ​ $ 3,468 ​ Right-of-use assets obtained in exchange for lease obligations: ​ ​ ​ ​ ​ ​ Operating leases ​ 1,216 ​ ​ ​ 4,346 ​ (1) An incremental borrowing rate is used based on information available at commencement date of lease.

BORROWINGS

BORROWINGS	3 Months Ended
	Mar. 31, 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2020 ​ 2019 Securities sold under agreements to repurchase ​ $ 56,781 ​ $ 66,053 ​ Federal Funds Purchased ​ ​ 25,000 ​ ​ — ​ FHLB advances ​ 355,000 ​ 370,200 ​ Total short-term borrowings ​ $ 436,781 ​ $ 436,253 ​ ​ ​ ​ ​ ​ ​ ​ ​ Average outstanding balance during the period ​ $ 364,931 ​ $ 673,116 ​ Average interest rate (during the period) ​ 1.48 % 2.30 % Average interest rate at end of period ​ 1.30 % 1.52 % ​ The Bank maintains federal funds lines with several correspondent banks, the remaining available balance of which was $787.0 million and $682.0 million at March 31, 2020 and December 31, 2019, respectively. The Company maintains an alternate line of credit at a correspondent bank, the available balance was $25.0 million at both March 31, 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 March 31, 2020. Additionally, the Company had a collateral dependent line of credit with the FHLB of up to $5.3 billion and $5.2 billion at March 31, 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 $14.7 million at March 31, 2020. The trust preferred capital notes currently qualify for Tier 2 capital of the Company for regulatory purposes. The Company’s trust preferred capital notes consist of the following as of March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust ​ ​ ​ ​ ​ ​ ​ Preferred ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capital ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ Securities (1) ​ Investment (1) ​ 3-Month LIBOR ​ Rate (2) ​ Maturity Trust Preferred Capital Note - Statutory Trust I ​ $ 22,500,000 ​ $ 696,000 2.75 % 4.20 % 6/17/2034 Trust Preferred Capital Note - Statutory Trust II ​ 36,000,000 ​ 1,114,000 1.40 % 2.85 % 6/15/2036 VFG Limited Liability Trust I Indenture ​ 20,000,000 ​ 619,000 2.73 % 4.18 % 3/18/2034 FNB Statutory Trust II Indenture ​ 12,000,000 ​ 372,000 3.10 % 4.55 % 6/26/2033 Gateway Capital Statutory Trust I ​ 8,000,000 ​ 248,000 3.10 % 4.55 % 9/17/2033 Gateway Capital Statutory Trust II ​ 7,000,000 ​ 217,000 2.65 % 4.10 % 6/17/2034 Gateway Capital Statutory Trust III ​ 15,000,000 ​ 464,000 1.50 % 2.95 % 5/30/2036 Gateway Capital Statutory Trust IV ​ 25,000,000 ​ 774,000 1.55 % 3.00 % 7/30/2037 MFC Capital Trust II ​ 5,000,000 ​ 155,000 2.85 % 4.30 % 1/23/2034 Total ​ $ 150,500,000 ​ $ 4,659,000 (1) 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. (2) Rate as of March 31, 2020. During the fourth quarter of 2016, the Company issued $150.0 million of fixed-to-floating rate subordinated notes with an initial fixed interest rate of 5.00% through December 15, 2021 . The interest rate then changes to a floating rate of LIBOR plus 3.175% through its maturity date on December 15, 2026 . In connection with the acquisition of Xenith on January 1, 2018, the Company acquired $8.5 million of subordinated notes with a fair value premium of $259,000 , which was $25,000 at March 31, 2020. The acquired subordinated notes have a fixed interest rate of 6.75% and a maturity date of June 30, 2025. At March 31, 2020 and December 31, 2019, the contractual principal reported for subordinated notes was $158.5 million; remaining issuance discount as of March 31, 2020 and December 31, 2019 is $1.3 million and $1.4 million, respectively. The subordinated notes qualify as Tier 2 capital for the Company for regulatory purposes. The Company has certain restrictive covenants related to certain asset quality, capital, and profitability metrics associated with the acquired subordinated notes and was considered to be in compliance with these covenants as of March 31, 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. The amortization expense is included as a component of interest expense on long-term borrowings on the Company’s Consolidated Statements of Income and was $493,000 for the three months ended March 31, 2019. On August 29, 2019, the Company repaid the floating rate FHLB advances. As of March 31, 2020, the Company had long-term advances from the FHLB consisting of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ 3-Month ​ Interest ​ ​ ​ ​ ​ Long-term Type ​ LIBOR ​ Rate (1) ​ Maturity Date ​ Advance Amount Convertible Flipper (0.75) % 0.70 % 8/17/2029 ​ $ 50,000 Convertible Flipper (0.50) % 0.95 % 5/15/2024 ​ 200,000 Convertible Flipper (0.75) % 0.70 % 5/22/2029 ​ 150,000 Convertible Flipper (0.75) % 0.70 % 5/30/2029 ​ 50,000 Convertible Flipper ​ (0.75) % 0.70 % 6/21/2029 ​ ​ 100,000 Fixed Rate Convertible ​ - ​ 1.78 % 10/26/2028 ​ ​ 200,000 Fixed Rate Hybrid ​ - ​ 1.58 % 5/18/2020 ​ ​ 20,000 Fixed Rate Credit ​ - ​ 1.54 % 10/2/2020 ​ ​ 10,000 ​ ​ ​ ​ ​ ​ ​ ​ $ 780,000 (1) Interest rates calculated using non-rounded numbers. As of December 31, 2019, the Company had long-term advances from the FHLB consisting of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ 3-Month ​ Interest ​ ​ ​ ​ ​ Long-term Type ​ LIBOR ​ Rate (1) ​ Maturity Date ​ Advance Amount ​ Convertible Flipper (0.75) % 1.16 % 8/17/2029 ​ $ 50,000 Convertible Flipper (0.50) % 1.41 % 5/15/2024 ​ 200,000 Convertible Flipper (0.75) % 1.16 % 5/22/2029 ​ 150,000 Convertible Flipper (0.75) % 1.16 % 5/30/2029 ​ 50,000 Convertible Flipper (0.75) % 1.16 % 6/21/2029 ​ 100,000 Fixed Rate Convertible - ​ 1.78 % 10/26/2028 ​ 200,000 Fixed Rate Hybrid - ​ 1.58 % 5/18/2020 ​ 20,000 Fixed Rate Credit ​ - ​ 1.54 % 10/2/2020 ​ ​ 10,000 ​ ​ ​ ​ ​ ​ ​ ​ $ 780,000 (1) Interest rates calculated using non-rounded numbers. ​ For information on the carrying value of loans and securities pledged as collateral on FHLB advances as of March 31, 2020 and December 31, 2019, refer to Note 8 "Commitments and Contingencies." As of March 31, 2020, the contractual maturities of long-term debt are as follows for the years ending (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ ​ ​ ​ ​ ​ ​ Fair Value ​ ​ ​ ​ ​ Capital ​ Subordinated ​ FHLB ​ Premium ​ Total Long-term ​ ​ Notes ​ Debt ​ Advances ​ (Discount) (1) ​ Borrowings For the remaining nine months of 2020 ​ $ — ​ $ — ​ $ 30,000 ​ $ (646) ​ $ 29,354 2021 ​ — ​ — ​ — ​ (1,008) ​ (1,008) 2022 ​ — ​ — ​ — ​ (1,030) ​ (1,030) 2023 ​ — ​ — ​ — ​ (1,053) ​ (1,053) 2024 ​ — ​ — ​ 200,000 ​ (1,078) ​ 198,922 Thereafter ​ 155,159 ​ 158,500 ​ 550,000 ​ (11,161) ​ 852,498 Total long-term borrowings ​ $ 155,159 ​ $ 158,500 ​ $ 780,000 ​ $ (15,976) ​ $ 1,077,683 (1) Includes discount on issued subordinated notes. ​

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 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 standby 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 March 31, 2020 and December 31, 2019, the Company’s reserves for off-balance sheet credit risk and indemnification were $10.7 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): ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 Commitments with off-balance sheet risk: ​ ​ Commitments to extend credit (1) ​ $ 4,605,213 ​ $ 4,691,272 Standby letters of credit ​ 165,371 ​ 209,658 Total commitments with off-balance sheet risk ​ $ 4,770,584 ​ $ 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 March 31, 2020, the Company had approximately $261.7 million in deposits in other financial institutions, of which $246.4 million served as collateral for cash flow and loan swap derivatives. The Company had approximately $12.1 million in deposits in other financial institutions that were uninsured at March 31, 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pledged Assets as of March 31, 2020 ​ ​ ​ ​ ​ ​ AFS HTM ​ ​ ​ ​ ​ ​ Cash ​ Securities (1) ​ Securities (1) ​ Loans (2) ​ Total Public deposits ​ $ — ​ $ 455,201 ​ $ 314,953 ​ $ — ​ $ 770,154 Repurchase agreements ​ — ​ 98,445 ​ — ​ — ​ 98,445 FHLB advances ​ — ​ 61,129 ​ — ​ 4,107,411 ​ 4,168,540 Derivatives ​ 246,430 ​ 1,091 ​ — ​ — ​ 247,521 Fed Funds ​ ​ — ​ ​ — ​ ​ — ​ ​ 319,914 ​ ​ 319,914 Other purposes ​ — ​ 118,597 ​ 9,037 ​ — ​ 127,634 Total pledged assets ​ $ 246,430 ​ $ 734,463 ​ $ 323,990 ​ $ 4,427,325 ​ $ 5,732,208 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (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	3 Months Ended
	Mar. 31, 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. Based on the Company’s assessment, its cash flow hedges are highly effective. During the quarter ended March 31, 2020, the Company terminated one interest rate swap designated as a cash flow hedge prior to its respective maturity date. The net loss reclassified into earnings totaled $1.8 million for the quarter ended March 31, 2020. This loss is immediately recognized into earnings as the forecasted transaction will not occur. The Company did not have any derivatives designated as cash flow hedges outstanding at March 31, 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 March 31, 2020 and December 31, 2019, the aggregate notional amount of the related hedged items for certain long-term fixed rate loans totaled $82.0 million and $83.1 million, respectively, and the fair value of the related hedged items was an unrealized loss of $6.8 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 March 31, 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 related 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 March 31, 2020 and December 31, 2019, segregated by derivatives that are considered accounting hedges and those that are not (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 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 ​ 131,961 ​ 1 ​ 14,769 ​ 133,078 ​ 182 ​ 6,256 Derivatives not designated as accounting hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loan Swaps : ​ ​ ​ ​ ​ ​ Pay fixed - receive floating interest rate swaps ​ 1,800,795 ​ — ​ 174,704 ​ 1,575,149 ​ 753 ​ 53,592 Pay floating - receive fixed interest rate swaps ​ 1,800,795 ​ 174,704 ​ — ​ 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 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) ​ $ 194,899 ​ $ 7,990 ​ $ 206,799 ​ $ 4,072 Loans ​ 81,961 ​ 6,734 ​ 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 March 31, 2020 and December 31, 2019, the amortized cost basis of this portfolio was $ 195 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	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
STOCKHOLDERS' EQUITY	10. STOCKHOLDERS’ EQUITY Serial Preferred Stock The Company has the authority to issue up to 500,000 shares of serial preferred stock with a par value of $10.00 per share. As of March 31, 2020 and December 31, 2019, the Company had no shares issued or outstanding . Accumulated Other Comprehensive Income (Loss) The change in accumulated other comprehensive income (loss) for the three months ended March 31, 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 - December 31, 2019 ​ $ 37,877 ​ $ 75 ​ $ (782) ​ $ (1,595) ​ $ 35,575 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 14,687 ​ ​ — ​ ​ (699) ​ ​ (1,289) ​ 12,699 Amounts reclassified from AOCI into earnings ​ (1,529) ​ ​ (5) ​ ​ 1,481 ​ ​ 108 ​ 55 Net current period other comprehensive income (loss) ​ 13,158 ​ (5) ​ 782 ​ (1,181) ​ 12,754 Balance - March 31, 2020 ​ $ 51,035 ​ $ 70 ​ $ — ​ $ (2,776) ​ $ 48,329 ​ The change in accumulated other comprehensive income (loss) for the three months ended March 31, 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 - December 31, 2018 ​ $ (5,949) ​ $ 95 ​ $ (3,393) ​ $ (1,026) ​ $ (10,273) Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 20,081 ​ ​ — ​ ​ (1,460) ​ ​ — ​ ​ 18,621 Amounts reclassified from AOCI into earnings ​ (85) ​ ​ (5) ​ ​ 120 ​ ​ 19 ​ ​ 49 Net current period other comprehensive income (loss) ​ 19,996 ​ (5) ​ (1,340) ​ 19 ​ 18,670 Balance - March 31, 2019 ​ $ 14,047 ​ $ 90 ​ $ (4,733) ​ $ (1,007) ​ $ 8,397 ​

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Mar. 31, 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 March 31, 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 March 31, 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 IDC, which evaluates securities based on market data. IDC 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 March 31, 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at March 31, 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 ​ $ — ​ $ 17,962 ​ $ — ​ $ 17,962 Obligations of states and political subdivisions ​ — ​ 546,726 ​ — ​ 546,726 Corporate and other bonds (1) ​ — ​ 120,968 ​ — ​ 120,968 Mortgage-backed securities ​ — ​ 1,284,157 ​ — ​ 1,284,157 Other securities ​ — ​ 3,090 ​ — ​ 3,090 Loans held for sale ​ — ​ 76,690 ​ — ​ 76,690 Derivatives: ​ ​ ​ ​ Interest rate swap ​ — ​ 174,704 ​ — ​ 174,704 Fair value hedges ​ — ​ 1 ​ — ​ 1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ Derivatives: ​ ​ ​ ​ Interest rate swap ​ $ — ​ $ 174,704 ​ $ — ​ $ 174,704 Fair value hedges ​ — ​ 14,769 ​ — ​ 14,769 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 March 31, 2020 and December 31, 2019 was $6.6 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 IDC, which evaluates securities based on market data. IDC 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 March 31, 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 March 31, 2020. 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 March 31, 2020 and December 31, 2019 are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at March 31, 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 ​ $ 504,959 ​ $ 504,959 ​ $ — ​ $ — ​ $ 504,959 AFS securities ​ 1,972,903 ​ — ​ 1,972,903 ​ — ​ 1,972,903 HTM securities ​ 552,176 ​ — ​ 588,984 ​ 15,796 ​ 604,780 Restricted stock ​ 130,227 ​ — ​ 130,227 ​ — ​ 130,227 Loans held for sale ​ 76,690 ​ — ​ 76,690 ​ — ​ 76,690 Net loans ​ 12,627,798 ​ — ​ — ​ 12,413,731 ​ 12,413,731 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 174,704 ​ — ​ 174,704 ​ — ​ 174,704 Fair value hedges ​ 1 ​ — ​ 1 ​ — ​ 1 Accrued interest receivable ​ 46,678 ​ — ​ 46,678 ​ — ​ 46,678 BOLI ​ 324,980 ​ — ​ 324,980 ​ — ​ 324,980 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ ​ Deposits ​ $ 13,553,035 ​ $ — ​ $ 13,610,143 ​ $ — ​ $ 13,610,143 Borrowings ​ 1,514,464 ​ — ​ 1,501,474 ​ — ​ 1,501,474 Accrued interest payable ​ 7,532 ​ — ​ 7,532 ​ — ​ 7,532 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 174,704 ​ — ​ 174,704 ​ — ​ 174,704 Fair value hedges ​ 14,769 ​ — ​ 14,769 ​ — ​ 14,769 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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	3 Months Ended
	Mar. 31, 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 months ended March 31, 2020 and 2019, consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ March 31, ​ ​ 2020 ​ 2019 Noninterest income: ​ ​ Deposit Service Charges (1) : ​ ​ Overdraft fees ​ $ 5,765 ​ $ 5,782 Maintenance fees & other ​ 1,813 ​ 1,376 Other service charges, commissions, and fees (1) ​ 1,624 ​ 1,664 Interchange fees (1) ​ 1,625 ​ 5,045 Fiduciary and asset management fees (1) : ​ ​ ​ ​ Trust asset management fees ​ 2,827 ​ 1,339 Registered advisor management fees ​ 2,088 ​ 2,875 Brokerage management fees ​ 1,069 ​ 840 Mortgage banking income ​ 2,022 ​ 1,454 Gains (losses) on securities transactions ​ 1,936 ​ 151 Bank owned life insurance income ​ 2,049 ​ 2,055 Loan-related interest rate swap fees ​ 3,948 ​ 1,460 Other operating income (2) ​ 2,141 ​ 897 Total noninterest income (3) ​ $ 28,907 ​ $ 24,938 (1) Income within scope of Topic 606. (2) Entire balance is within scope of Topic 606 for the three months ended March 31, 2020. Includes income within the scope of Topic 606 of $813,000 for the three months ended March 31, 2019 ; the remaining balance is outside the scope of Topic 606. (3) Noninterest income for the discontinued mortgage segment is reported in Note 14 "Segment Reporting & Discontinued Operations." ​

EARNINGS PER SHARE

EARNINGS PER SHARE	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
EARNINGS PER SHARE	13. EARNINGS PER SHARE Basic EPS is computed by dividing net income available to common stockholders 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 stockholders for the three months ended March 31, 2020 and 2019 (dollars in thousands except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ 2020 ​ 2019 Net Income: ​ ​ ​ ​ ​ ​ Income from continuing operations ​ $ 7,089 ​ $ 35,716 Income (loss) from discontinued operations ​ — ​ (85) Net income available to common stockholders ​ $ 7,089 ​ $ 35,631 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average shares outstanding, basic ​ 79,290 ​ 76,472 Dilutive effect of stock awards and warrants ​ 27 ​ 61 Weighted average shares outstanding, diluted ​ 79,317 ​ 76,533 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS: ​ ​ EPS from continuing operations ​ $ 0.09 ​ $ 0.47 EPS from discontinued operations ​ — ​ — EPS available to common stockholders ​ $ 0.09 ​ $ 0.47 ​ ​ ​ ​ ​ ​ ​ Diluted EPS: ​ ​ EPS from continuing operations ​ $ 0.09 ​ $ 0.47 EPS from discontinued operations ​ — ​ — EPS available to common stockholders ​ $ 0.09 ​ $ 0.47 ​

SEGMENT REPORTING & DISCONTINUE

SEGMENT REPORTING & DISCONTINUED OPERATIONS	3 Months Ended
	Mar. 31, 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 this 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 months ended March 31, 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 months ended March 31, 2019 (dollars in thousands): ​ ​ ​ ​ Three Months Ended ​ March 31, 2019 Net interest income $ — Provision for credit losses ​ — Net interest income after provision for credit losses ​ — Noninterest income ​ 1 Noninterest expenses ​ 116 Income before income taxes ​ (115) Income tax expense (benefit) ​ (30) Net income (loss) on discontinued operations $ (85) ​ ​

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	15. SUBSEQUENT EVENTS ​ Paycheck Protection Program Under the CARES Act, the SBA PPP was created with the intention of providing economic relief to small businesses that have been adversely impacted by COVID-19. The Bank has been participating in the PPP. The Bank has received SBA approval for more than 10,000 loans with a total loan amount of approximately $1.8 billion. The Bank intends to fund PPP loans using a combination of customer deposits, the Federal Reserve’s PPP Liquidity Facility, and other wholesale liquidity sources. ​ COVID-19-Related Loan Modifications 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. 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. The Company has approved loan modifications of this nature of approximately $1.9 billion. ​

ACCOUNTING POLICIES (Policies)

ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 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 149 branches and approximately 170 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., Dixon, Hubard, Feinour, & Brown, Inc., and Middleburg Investment Services, LLC, which provide investment advisory and/or brokerage services; and Union Insurance Group, LLC, which offers various lines of insurance products. 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. The CARES Act, as well as other interagency guidance, provide enhanced guidelines and accounting for COVID-19 related modifications. 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.
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 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. 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, 2020. ​ The Company’s adoption of ASC 326 resulted in a change in the accounting and reporting related to PCI loans which are now defined as PCD and evaluated at the loan level instead of being evaluated in pools under PCI accounting. 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 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 recognized. ​ The following table illustrates the impact of ASC 326. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ALLL. 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 rates 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. Management also considers qualitative factors when estimating loan losses to take into account model limitations. 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 is 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 $31.1 million on loans held for investment and, $5.2 million on HTM securities at March 31, 2020 and is included in “Other Assets” on the Company’s consolidated balance sheet.
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 . The difference between the fair value and unpaid principal balance of the loan at acquisition date (premium or discount) is amortized or accreted into interest income over the life of the loans. If the acquired performing loan has revolving privileges, it is accounted for using the straight-line method; otherwise, the effective interest method is used. ​ PCD loans reflect loans that have experienced more-than-insignificant credit deterioration since origination. These PCD loans are accounted for under ASC 326 . Credit risk characteristics include risk rating groups, nonaccrual status, and past due status. For valuation purposes, these pools are further disaggregated by maturity, pricing characteristics, and re-payment structure. ​ 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. Subsequent changes to the ALLL are recorded through provision expense. ​ The PCD loans are and will continue to be subject to the Company’s internal and external credit review and monitoring.
Business Combinations and Divestitures	Business Combinations and Divestitures On February 1, 2019, the Company completed the acquisition of Access. Refer to the Note 2 “Acquisitions” for additional information.
Goodwill and Intangible Assets	Goodwill and Intangible Assets The Company has an aggregate goodwill balance of $935.6 million associated with previous merger transactions, which is primarily associated with commercial and consumer banking. ​ Goodwill resulting from business combinations prior to January 1, 2009 represents the excess of the purchase price over the fair value of the net assets of businesses acquired. Goodwill resulting from business combinations after January 1, 2009 is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exists that indicate that a goodwill impairment test should be performed. The Company has selected April 30th as the date to perform the annual impairment test. The Company performed its annual goodwill impairment testing as of April 30, 2019 and determined that there was no impairment to its goodwill. ​ The Company performed an interim impairment review as of March 31, 2020 and considered various factors including, the results of the prior year impairment test, the Company’s most recent forecasts, and the Company’s recent stock price movements, and concluded that no impairment existed as of the balance sheet date. ​ Intangible assets with definite useful lives are amortized over their estimated useful lives, which range from 4 to 10 years , to their estimated residual values. Goodwill is the only intangible asset with an indefinite life included on the Company’s Consolidated Balance Sheets. ​ Long-lived assets, including purchased intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented on the Company's Consolidated Balance Sheets and reported at the lower of the carrying amount or fair value less costs to sell, would no longer depreciated. Management performed a review of impairment through March 31, 2020, and concluded no impairment of these assets existed as of the balance sheet date.
Held-to-maturity Securities
Allowance for Credit Losses	​ Allowance for Credit Losses on HTM Securities The Company evaluates the credit risk of its 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 March 31, 2020.
Available-for-sale Securities
Allowance for Credit Losses	Allowance for Credit Losses on AFS Securities 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 is influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, and others. There is currently no ACL held against the Company’s AFS securities portfolio at March 31, 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.
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. 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)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Illustration of the Impact of ASC 326	The following table illustrates the impact of ASC 326. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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)	3 Months Ended
	Mar. 31, 2020
Amortized Cost of AFS Securities by Security Type and Credit Rating	The following table presents the amortized cost of AFS securities as of March 31, 2020 by security type and credit rating (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2020 ​ U.S. Government and Agency Obligations of states and political Corporate and Mortgage-backed Other Total AFS ​ ​ securities ​ subdivisions ​ other bonds ​ securities ​ securities ​ securities Credit Rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ AAA/AA/A ​ $ 2,497 ​ $ 514,374 ​ $ 32,288 ​ $ 38,859 ​ $ — ​ $ 588,018 BBB/BB/B ​ — ​ 1,033 ​ 22,853 ​ ​ — ​ — ​ 23,886 Not Rated - Agency (1) ​ ​ 15,134 ​ ​ — ​ ​ — ​ ​ 1,153,495 ​ ​ 1,608 ​ ​ 1,170,237 Not Rated - Non-Agency ​ ​ — ​ ​ 507 ​ ​ 67,091 ​ ​ 49,092 ​ ​ 1,482 ​ ​ 118,172 Total ​ $ 17,631 ​ $ 515,914 ​ $ 122,232 ​ $ 1,241,446 ​ $ 3,090 ​ $ 1,900,313 (1) Generally considered not to have credit risk given the government guarantees associated with these agencies
Amortized Cost of HTM Securities by Security Type and Credit Rating	The following table presents the amortized cost of HTM securities as of March 31, 2020 by security type and credit rating (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2020 ​ U.S. Government and Agency Obligations of states and political Mortgage-backed ​ Total HTM ​ ​ securities ​ subdivisions ​ securities ​ securities Credit Rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ AAA/AA/A ​ $ — ​ $ 536,747 ​ $ — ​ $ 536,747 Not Rated - Agency (1) ​ ​ 2,797 ​ ​ — ​ ​ 5,862 ​ ​ 8,659 Not Rated - Non-Agency ​ ​ — ​ 6,770 ​ ​ — ​ ​ 6,770 Total ​ $ 2,797 ​ $ 543,517 ​ $ 5,862 ​ $ 552,176 (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 months ended March 31, 2020 and 2019 (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Three Months Ended ​ ​ March 31, 2020 ​ March 31, 2019 Realized gains (losses): ​ ​ Gross realized gains ​ $ 2,164 ​ $ 1,213 Gross realized losses ​ (228) ​ (1,062) Net realized gains ​ $ 1,936 ​ $ 151 ​ ​ ​ ​ ​ ​ ​ Proceeds from sales of securities ​ $ 120,701 ​ $ 208,249
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 March 31, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated ​ Cost Gains (Losses) Fair Value March 31, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 17,631 ​ $ 365 ​ $ (34) ​ $ 17,962 Obligations of states and political subdivisions ​ 515,914 ​ 31,367 ​ (555) ​ 546,726 Corporate and other bonds (1) ​ 122,232 ​ 2,185 ​ (3,449) ​ 120,968 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 353,684 ​ ​ 13,819 ​ ​ (56) ​ ​ 367,447 Residential ​ ​ 887,762 ​ ​ 33,820 ​ ​ (4,872) ​ ​ 916,710 Total mortgage-backed securities ​ ​ 1,241,446 ​ ​ 47,639 ​ ​ (4,928) ​ ​ 1,284,157 Other securities ​ 3,090 ​ — ​ — ​ 3,090 Total AFS securities ​ $ 1,900,313 ​ $ 81,556 ​ $ (8,966) ​ $ 1,972,903 (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 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 416,904 ​ ​ 8,786 ​ ​ (643) ​ ​ 425,047 Residential ​ ​ 896,609 ​ ​ 17,156 ​ ​ (816) ​ ​ 912,949 Total mortgage-backed securities ​ ​ 1,313,513 ​ ​ 25,942 ​ ​ (1,459) ​ ​ 1,337,996 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 March 31, 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 March 31, 2020 ​ ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 5,338 ​ $ (23) ​ $ 1,619 ​ $ (11) ​ $ 6,957 ​ ​ (34) Obligations of states and political subdivisions ​ ​ 24,757 ​ ​ (555) ​ ​ — ​ ​ — ​ ​ 24,757 ​ $ (555) Corporate and other bonds (1) ​ 40,409 ​ (2,854) ​ 19,922 ​ (595) ​ 60,331 ​ (3,449) Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 14,667 ​ ​ (56) ​ ​ — ​ ​ — ​ ​ 14,667 ​ ​ (56) Residential ​ ​ 135,577 ​ ​ (4,436) ​ ​ 14,880 ​ ​ (436) ​ ​ 150,457 ​ ​ (4,872) Total mortgage-backed securities ​ ​ 150,244 ​ ​ (4,492) ​ ​ 14,880 ​ ​ (436) ​ ​ 165,124 ​ ​ (4,928) Total AFS securities ​ $ 220,748 ​ $ (7,924) ​ $ 36,421 ​ $ (1,042) ​ $ 257,169 ​ $ (8,966) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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) Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 54,714 ​ ​ (554) ​ ​ 14,966 ​ ​ (89) ​ ​ 69,680 ​ ​ (643) Residential ​ ​ 114,147 ​ ​ (500) ​ ​ 40,168 ​ ​ (316) ​ ​ 154,315 ​ ​ (816) Total mortgage-backed securities ​ ​ 168,861 ​ ​ (1,054) ​ ​ 55,134 ​ ​ (405) ​ ​ 223,995 ​ ​ (1,459) 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 March 31, 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). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 ​ Amortized Estimated Amortized Estimated ​ ​ Cost ​ Fair Value ​ Cost ​ Fair Value Due in one year or less ​ $ 24,916 ​ $ 25,080 ​ $ 35,177 ​ $ 35,329 Due after one year through five years ​ 157,141 ​ 162,774 ​ 164,605 ​ 166,873 Due after five years through ten years ​ 221,929 ​ 228,121 ​ 249,713 ​ 254,790 Due after ten years ​ 1,496,327 ​ 1,556,928 ​ 1,443,932 ​ 1,488,453 Total AFS securities ​ $ 1,900,313 ​ $ 1,972,903 ​ $ 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 March 31, 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). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 ​ Carrying Estimated Carrying Estimated ​ ​ Value ​ Fair Value ​ Value ​ Fair Value Due in one year or less ​ $ — ​ $ — ​ $ 502 ​ $ 504 Due after one year through five years ​ 10,198 ​ 10,411 ​ 10,258 ​ 10,539 Due after five years through ten years ​ 1,760 ​ 1,767 ​ 1,768 ​ 1,800 Due after ten years ​ 540,218 ​ 592,602 ​ 542,616 ​ 590,660 Total HTM securities ​ $ 552,176 ​ $ 604,780 ​ $ 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 March 31, 2020 are summarized as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Gross Unrealized ​ Estimated ​ Value Gains (Losses) ​ Fair Value March 31, 2020 ​ ​ ​ ​ ​ U.S. government and agency securities ​ $ 2,797 ​ $ — ​ $ (69) ​ $ 2,728 Obligations of states and political subdivisions ​ ​ 543,517 ​ ​ 52,815 ​ ​ — ​ ​ 596,332 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 5,862 ​ ​ — ​ ​ (142) ​ ​ 5,720 Residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total mortgage-backed securities ​ ​ 5,862 ​ ​ — ​ ​ (142) ​ ​ 5,720 Total held-to-maturity securities ​ $ 552,176 ​ $ 52,815 ​ $ (211) ​ $ 604,780 ​ 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 Mortgage-backed securities ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 7,183 ​ ​ 59 ​ ​ — ​ ​ 7,242 Residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total 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)	3 Months Ended
	Mar. 31, 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 Construction and Land Development ​ $ 1,318,252 ​ $ 1,250,924 Commercial Real Estate - Owner Occupied ​ 2,051,904 ​ 2,041,243 Commercial Real Estate - Non-Owner Occupied ​ 3,328,012 ​ 3,286,098 Multifamily Real Estate ​ 679,390 ​ 633,743 Commercial & Industrial ​ 2,177,932 ​ 2,114,033 Residential 1-4 Family - Commercial ​ 721,800 ​ 724,337 Residential 1-4 Family - Consumer ​ 854,550 ​ 890,503 Residential 1-4 Family - Revolving ​ 652,135 ​ 659,504 Auto ​ 358,039 ​ 350,419 Consumer ​ 352,572 ​ 372,853 Other Commercial ​ 274,255 ​ 287,279 Total loans held for investment, net ​ $ 12,768,841 ​ $ 12,610,936
Summary of Aging of the Loan Portfolio by Class	The following table shows the aging of the Company’s loan portfolio, by class, at March 31, 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 ​ $ 1,311,599 ​ $ 2,786 ​ $ 316 ​ $ 317 ​ $ 3,234 ​ $ 1,318,252 Commercial Real Estate - Owner Occupied ​ 2,026,741 ​ 10,779 ​ 1,444 ​ 1,690 ​ 11,250 ​ 2,051,904 Commercial Real Estate - Non-Owner Occupied ​ 3,319,481 ​ 2,087 ​ 2,765 ​ 2,037 ​ 1,642 ​ 3,328,012 Multifamily Real Estate ​ 676,343 ​ 623 ​ 1,994 ​ 377 ​ 53 ​ 679,390 Commercial & Industrial ​ 2,167,873 ​ 4,893 ​ 1,218 ​ 517 ​ 3,431 ​ 2,177,932 Residential 1-4 Family - Commercial ​ 708,772 ​ 4,145 ​ 1,066 ​ 777 ​ 7,040 ​ 721,800 Residential 1-4 Family - Consumer ​ 820,818 ​ 15,667 ​ 570 ​ 4,407 ​ 13,088 ​ 854,550 Residential 1-4 Family - Revolving ​ 640,989 ​ 4,308 ​ 1,286 ​ 2,005 ​ 3,547 ​ 652,135 Auto ​ 355,084 ​ 1,967 ​ 311 ​ 127 ​ 550 ​ 358,039 Consumer ​ 348,953 ​ 1,612 ​ 1,294 ​ 622 ​ 91 ​ 352,572 Other Commercial ​ ​ 273,090 ​ ​ 1 ​ ​ 1,068 ​ ​ — ​ ​ 96 ​ ​ 274,255 Total loans held for investment ​ $ 12,649,743 ​ $ 48,868 ​ $ 13,332 ​ $ 12,876 ​ $ 44,022 ​ $ 12,768,841 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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonaccrual ​ ​ ​ ​ ​ ​ ​ ​ January 1, 2020 ​ March 31, 2020 ​ Nonaccrual With No ALLL ​ 90 Days and still Accruing Construction and Land Development ​ $ 4,060 ​ $ 3,234 ​ $ 1,985 ​ $ 317 Commercial Real Estate - Owner Occupied ​ ​ 13,889 ​ ​ 11,250 ​ ​ 3,591 ​ ​ 1,690 Commercial Real Estate - Non-Owner Occupied ​ ​ 1,368 ​ ​ 1,642 ​ ​ — ​ ​ 2,037 Multifamily Real Estate ​ ​ — ​ ​ 53 ​ ​ — ​ ​ 377 Commercial & Industrial ​ ​ 3,037 ​ ​ 3,431 ​ ​ 93 ​ ​ 517 Residential 1-4 Family - Commercial ​ ​ 6,492 ​ ​ 7,040 ​ ​ 1,739 ​ ​ 777 Residential 1-4 Family - Consumer ​ ​ 13,117 ​ ​ 13,088 ​ ​ 1,069 ​ ​ 4,407 Residential 1-4 Family - Revolving ​ ​ 2,490 ​ ​ 3,547 ​ ​ 60 ​ ​ 2,005 Auto ​ ​ 565 ​ ​ 550 ​ ​ — ​ ​ 127 Consumer ​ ​ 88 ​ ​ 91 ​ ​ — ​ ​ 622 Other Commercial ​ ​ 98 ​ ​ 96 ​ ​ — ​ ​ — Total loans held for investment ​ $ 45,204 ​ $ 44,022 ​ $ 8,537 ​ $ 12,876
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 months ended March 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, 2019 ​ ​ ​ Interest ​ ​ Average ​ Income ​ ​ Investment ​ Recognized Construction and Land Development ​ $ 9,425 ​ $ 39 Commercial Real Estate - Owner Occupied ​ 11,554 ​ 105 Commercial Real Estate - Non-Owner Occupied ​ 6,956 ​ 59 Commercial & Industrial ​ 2,224 ​ 14 Residential 1-4 Family - Commercial ​ 6,475 ​ 32 Residential 1-4 Family - Consumer ​ 18,257 ​ 114 Residential 1-4 Family - Revolving ​ 3,472 ​ 40 Auto ​ 600 ​ — Consumer ​ 215 ​ 2 Other Commercial ​ ​ 588 ​ ​ 8 Total impaired loans ​ $ 59,766 ​ $ 413
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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ No. of Recorded Outstanding ​ ​ Loans ​ Investment ​ Commitment Performing ​ ​ Construction and Land Development 4 ​ $ 226 ​ $ — Commercial Real Estate - Owner Occupied 6 ​ 2,223 ​ — Commercial Real Estate - Non-Owner Occupied 1 ​ 1,089 ​ — Commercial & Industrial 4 ​ 995 ​ — Residential 1-4 Family - Commercial 5 ​ 287 ​ — Residential 1-4 Family - Consumer 74 ​ 9,502 ​ — Residential 1-4 Family - Revolving 2 ​ 55 ​ — Consumer 4 ​ 26 ​ — Other Commercial ​ 1 ​ ​ 462 ​ ​ — Total performing 101 ​ $ 14,865 ​ $ — Nonperforming ​ ​ Commercial Real Estate - Owner Occupied 2 ​ $ 172 ​ $ — Commercial & Industrial 1 ​ 517 ​ — Residential 1-4 Family - Consumer 22 ​ 4,747 ​ — Residential 1-4 Family - Revolving 2 ​ 55 ​ — Total nonperforming 27 ​ $ 5,491 ​ $ — Total performing and nonperforming 128 ​ $ 20,356 ​ $ — 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 months ended March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended March 31, 2020 ​ ​ Recorded ​ ​ No. of ​ Investment at ​ ​ 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 ​ $ 517 Total loan term extended at a market rate 1 ​ $ 517 ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ Construction and Land Development ​ 1 ​ $ 35 Residential 1-4 Family - Consumer 10 ​ 1,763 Total loan term extended at a below market rate 11 ​ $ 1,798 ​ ​ ​ ​ ​ ​ Interest rate modification, below market rate ​ Total interest only at below market rate of interest — ​ $ — ​ ​ ​ ​ ​ ​ Total 12 ​ $ 2,315 The following table shows, by class and modification type, TDRs that occurred during the three months ended March 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ All Restructurings ​ ​ Three Months Ended March 31, 2019 ​ ​ Recorded ​ ​ No. of ​ Investment at ​ ​ 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 ​ $ 441 Residential 1-4 Family - Commercial 1 ​ 75 Residential 1-4 Family - Consumer 2 ​ 263 Consumer 1 ​ 10 Total loan term extended at a market rate 5 ​ $ 789 ​ ​ ​ ​ ​ ​ Term modification, below market rate ​ Residential 1-4 Family - Consumer 5 ​ $ 937 Consumer ​ 1 ​ ​ 6 Total loan term extended at a below market rate 6 ​ $ 943 ​ ​ ​ ​ ​ ​ Total 11 ​ $ 1,732 ​ ​ ​ ​ ​ ​
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 months ended March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2020 ​ ​ Commercial ​ Consumer ​ Total Balance, beginning of year ​ $ 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 ASC 326 adoption ​ 6,184 ​ 41,300 ​ 47,484 Loans charged-off ​ (2,968) ​ (4,183) ​ (7,151) Recoveries credited to allowance ​ 1,154 ​ 1,006 ​ 2,160 Provision charged to operations ​ 42,532 ​ 13,724 ​ 56,256 Balance, end of period ​ $ 77,843 ​ $ 63,200 ​ $ 141,043 The following table shows the ALLL activity by class for the three months ended March 31, 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): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2019 ​ ​ Allowance for loan and lease 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 ​ $ 27 ​ $ (732) ​ $ 126 ​ $ 6,224 Commercial Real Estate - Owner Occupied ​ 4,023 ​ 25 ​ (47) ​ 29 ​ 4,030 Commercial Real Estate - Non-Owner Occupied ​ 8,865 ​ 89 ​ — ​ 82 ​ 9,036 Multifamily Real Estate ​ 649 ​ 85 ​ — ​ (74) ​ 660 Commercial & Industrial ​ 7,636 ​ 360 ​ (980) ​ 395 ​ 7,411 Residential 1-4 Family - Commercial ​ 1,692 ​ 87 ​ (66) ​ 47 ​ 1,760 Residential 1-4 Family - Consumer ​ 1,492 ​ 155 ​ (32) ​ 117 ​ 1,732 Residential 1-4 Family - Revolving ​ 1,297 ​ 87 ​ (216) ​ 238 ​ 1,406 Auto ​ 1,443 ​ 186 ​ (399) ​ 216 ​ 1,446 Consumer and all other (1) ​ 7,145 ​ 595 ​ (3,467) ​ 2,849 ​ 7,122 Total ​ $ 41,045 ​ $ 1,696 ​ $ (5,939) ​ $ 4,025 ​ $ 40,827 (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 March 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ For the Three Months Ended March 31, ​ 2019 Balance at beginning of period ​ $ 31,201 Additions ​ 2,432 Accretion ​ (2,385) Reclass of nonaccretable difference due to improvement in expected cash flows ​ 465 Other, net (1) ​ 1,508 Balance at end of period ​ $ 33,221 (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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total ​ Converted to Term Construction and Land Development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 69,552 ​ $ 467,635 ​ $ 434,210 ​ $ 132,703 ​ $ 53,894 ​ $ 81,829 ​ $ 30,573 ​ $ 1,270,396 ​ $ — Watch & Special Mention ​ ​ 1,200 ​ ​ 8,607 ​ ​ 1,566 ​ ​ 865 ​ ​ 6,615 ​ ​ 15,627 ​ ​ 1,848 ​ ​ 36,328 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ 732 ​ ​ 736 ​ ​ 2,405 ​ ​ 7,655 ​ ​ — ​ ​ 11,528 ​ ​ — Total Construction and Land Development ​ $ 70,752 ​ $ 476,242 ​ $ 436,508 ​ $ 134,304 ​ $ 62,914 ​ $ 105,111 ​ $ 32,421 ​ $ 1,318,252 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 79,743 ​ $ 391,157 ​ $ 312,340 ​ $ 266,525 ​ $ 147,239 ​ $ 681,938 ​ $ 37,492 ​ $ 1,916,434 ​ $ — Watch & Special Mention ​ ​ — ​ ​ 5,726 ​ ​ 16,831 ​ ​ 15,683 ​ ​ 25,211 ​ ​ 47,288 ​ ​ 3,551 ​ ​ 114,290 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ 1,115 ​ ​ 1,333 ​ ​ 2,730 ​ ​ 15,628 ​ ​ 374 ​ ​ 21,180 ​ ​ — Total Commercial Real Estate - Owner Occupied ​ $ 79,743 ​ $ 396,883 ​ $ 330,286 ​ $ 283,541 ​ $ 175,180 ​ $ 744,854 ​ $ 41,417 ​ $ 2,051,904 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate - Non-Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 100,998 ​ $ 501,212 ​ $ 490,930 ​ $ 472,440 ​ $ 480,363 ​ $ 1,159,966 ​ $ 44,949 ​ $ 3,250,858 ​ $ — Watch & Special Mention ​ ​ — ​ ​ 1,061 ​ ​ 8,838 ​ ​ 13,449 ​ ​ 16,707 ​ ​ 29,450 ​ ​ 838 ​ ​ 70,343 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ 164 ​ ​ — ​ ​ 25 ​ ​ 6,330 ​ ​ 200 ​ ​ 6,719 ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 92 ​ ​ 92 ​ ​ — Total Commercial Real Estate - Non-Owner Occupied ​ $ 100,998 ​ $ 502,273 ​ $ 499,932 ​ $ 485,889 ​ $ 497,095 ​ $ 1,195,746 ​ $ 46,079 ​ $ 3,328,012 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial & Industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 127,407 ​ $ 445,967 ​ $ 280,399 ​ $ 90,466 ​ $ 90,219 ​ $ 176,554 ​ $ 894,146 ​ $ 2,105,158 ​ $ 353 Watch & Special Mention ​ ​ 457 ​ ​ 3,817 ​ ​ 7,987 ​ ​ 1,520 ​ ​ 3,900 ​ ​ 4,367 ​ ​ 40,039 ​ ​ 62,087 ​ ​ 49 Substandard ​ ​ — ​ ​ 505 ​ ​ 1,015 ​ ​ 253 ​ ​ 900 ​ ​ 3,222 ​ ​ 4,792 ​ ​ 10,687 ​ ​ — Total Commercial & Industrial ​ $ 127,864 ​ $ 450,289 ​ $ 289,401 ​ $ 92,239 ​ $ 95,019 ​ $ 184,143 ​ $ 938,977 ​ $ 2,177,932 ​ $ 402 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multifamily Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 60,276 ​ $ 78,954 ​ $ 63,329 ​ $ 129,106 ​ $ 64,831 ​ $ 254,868 ​ $ 7,286 ​ $ 658,650 ​ $ — Watch & Special Mention ​ ​ — ​ ​ — ​ ​ — ​ ​ 8,286 ​ ​ 1,134 ​ ​ 10,551 ​ ​ 339 ​ ​ 20,310 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 430 ​ ​ — ​ ​ 430 ​ ​ — Total Multifamily Real Estate ​ $ 60,276 ​ $ 78,954 ​ $ 63,329 ​ $ 137,392 ​ $ 65,965 ​ $ 265,849 ​ $ 7,625 ​ $ 679,390 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 29,989 ​ $ 112,509 ​ $ 79,932 ​ $ 104,116 ​ $ 86,412 ​ $ 264,081 ​ $ 1,911 ​ $ 678,950 ​ $ 810 Watch & Special Mention ​ ​ 880 ​ ​ 2,720 ​ ​ 8,378 ​ ​ 3,617 ​ ​ 2,159 ​ ​ 13,689 ​ ​ — ​ ​ 31,443 ​ ​ 2,762 Substandard ​ ​ — ​ ​ — ​ ​ 310 ​ ​ 632 ​ ​ 1,846 ​ ​ 8,002 ​ ​ 617 ​ ​ 11,407 ​ ​ 76 Total Residential 1-4 Family - Commercial ​ $ 30,869 ​ $ 115,229 ​ $ 88,620 ​ $ 108,365 ​ $ 90,417 ​ $ 285,772 ​ $ 2,528 ​ $ 721,800 ​ $ 3,648 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,468 ​ $ 116,582 ​ $ 9,904 ​ $ 43,520 ​ $ 17,802 ​ $ 59,403 ​ $ 19,049 ​ $ 267,728 ​ $ — Watch & Special Mention ​ ​ — ​ ​ — ​ ​ 636 ​ ​ 1,337 ​ ​ — ​ ​ 4,344 ​ ​ 54 ​ ​ 6,371 ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ 60 ​ ​ — ​ ​ 96 ​ ​ — ​ ​ 156 ​ ​ — Total Other Commercial ​ $ 1,468 ​ $ 116,582 ​ $ 10,540 ​ $ 44,917 ​ $ 17,802 ​ $ 63,843 ​ $ 19,103 ​ $ 274,255 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 469,433 ​ $ 2,114,016 ​ $ 1,671,044 ​ $ 1,238,876 ​ $ 940,760 ​ $ 2,678,639 ​ $ 1,035,406 ​ $ 10,148,174 ​ $ 1,163 Watch & Special Mention ​ ​ 2,537 ​ ​ 21,931 ​ ​ 44,236 ​ ​ 44,757 ​ ​ 55,726 ​ ​ 125,316 ​ ​ 46,669 ​ ​ 341,172 ​ ​ 2,811 Substandard ​ ​ — ​ ​ 505 ​ ​ 3,336 ​ ​ 3,014 ​ ​ 7,906 ​ ​ 41,363 ​ ​ 5,983 ​ ​ 62,107 ​ ​ 76 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 92 ​ ​ 92 ​ ​ — Total Commercial ​ $ 471,970 ​ $ 2,136,452 ​ $ 1,718,616 ​ $ 1,286,647 ​ $ 1,004,392 ​ $ 2,845,318 ​ $ 1,088,150 ​ $ 10,551,545 ​ $ 4,050
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 March 31, 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ Term Loans Amortized Cost Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ Revolving Loans ​ Total ​ Converted to Term Residential 1-4 Family - Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 21,273 ​ $ 95,266 ​ $ 105,226 ​ $ 99,655 ​ $ 129,032 ​ $ 370,353 ​ $ 13 ​ $ 820,818 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 1,268 ​ ​ 1,537 ​ ​ 2,566 ​ ​ 453 ​ ​ 9,843 ​ ​ — ​ ​ 15,667 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ 109 ​ ​ 77 ​ ​ — ​ ​ 384 ​ ​ — ​ ​ 570 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 728 ​ ​ 125 ​ ​ 445 ​ ​ 276 ​ ​ 2,833 ​ ​ — ​ ​ 4,407 ​ ​ — Nonaccrual ​ ​ — ​ ​ — ​ ​ 888 ​ ​ 891 ​ ​ 797 ​ ​ 10,512 ​ ​ — ​ ​ 13,088 ​ ​ — Total Residential 1-4 Family - Consumer ​ $ 21,273 ​ $ 97,262 ​ $ 107,885 ​ $ 103,634 ​ $ 130,558 ​ $ 393,925 ​ $ 13 ​ $ 854,550 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 Family - Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 6,463 ​ $ 7,732 ​ $ 2,641 ​ $ 21 ​ $ — ​ $ 661 ​ $ 623,471 ​ $ 640,989 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 49 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 4,259 ​ ​ 4,308 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,286 ​ ​ 1,286 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,005 ​ ​ 2,005 ​ ​ — Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 314 ​ ​ 3,233 ​ ​ 3,547 ​ ​ — Total Residential 1-4 Family - Revolving ​ $ 6,463 ​ $ 7,781 ​ $ 2,641 ​ $ 21 ​ $ — ​ $ 975 ​ $ 634,254 ​ $ 652,135 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 25,016 ​ $ 106,175 ​ $ 110,825 ​ $ 34,857 ​ $ 14,995 ​ $ 20,293 ​ $ 36,792 ​ $ 348,953 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 329 ​ ​ 692 ​ ​ 198 ​ ​ 11 ​ ​ 342 ​ ​ 40 ​ ​ 1,612 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ 193 ​ ​ 699 ​ ​ 84 ​ ​ 28 ​ ​ 288 ​ ​ 2 ​ ​ 1,294 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 139 ​ ​ 368 ​ ​ 94 ​ ​ 13 ​ ​ — ​ ​ 8 ​ ​ 622 ​ ​ — Nonaccrual ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ 88 ​ ​ — ​ ​ 91 ​ ​ — Total Consumer ​ $ 25,016 ​ $ 106,836 ​ $ 112,584 ​ $ 35,233 ​ $ 15,050 ​ $ 21,011 ​ $ 36,842 ​ $ 352,572 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Auto ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 35,381 ​ $ 149,149 ​ $ 77,698 ​ $ 48,701 ​ $ 28,777 ​ $ 15,378 ​ $ — ​ $ 355,084 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 463 ​ ​ 528 ​ ​ 447 ​ ​ 347 ​ ​ 182 ​ ​ — ​ ​ 1,967 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ 63 ​ ​ 52 ​ ​ 92 ​ ​ 40 ​ ​ 64 ​ ​ — ​ ​ 311 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 77 ​ ​ 24 ​ ​ 12 ​ ​ — ​ ​ 14 ​ ​ — ​ ​ 127 ​ ​ — Nonaccrual ​ ​ — ​ ​ 117 ​ ​ 81 ​ ​ 106 ​ ​ 148 ​ ​ 98 ​ ​ — ​ ​ 550 ​ ​ — Total Auto ​ $ 35,381 ​ $ 149,869 ​ $ 78,383 ​ $ 49,358 ​ $ 29,312 ​ $ 15,736 ​ $ — ​ $ 358,039 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 88,133 ​ $ 358,322 ​ $ 296,390 ​ $ 183,234 ​ $ 172,804 ​ $ 406,685 ​ $ 660,276 ​ $ 2,165,844 ​ $ — 30-59 Days Past Due ​ ​ — ​ ​ 2,109 ​ ​ 2,757 ​ ​ 3,211 ​ ​ 811 ​ ​ 10,367 ​ ​ 4,299 ​ ​ 23,554 ​ ​ — 60-89 Days Past Due ​ ​ — ​ ​ 256 ​ ​ 860 ​ ​ 253 ​ ​ 68 ​ ​ 736 ​ ​ 1,288 ​ ​ 3,461 ​ ​ — 90+ Days Past Due ​ ​ — ​ ​ 944 ​ ​ 517 ​ ​ 551 ​ ​ 289 ​ ​ 2,847 ​ ​ 2,013 ​ ​ 7,161 ​ ​ — Nonaccrual ​ ​ — ​ ​ 117 ​ ​ 969 ​ ​ 997 ​ ​ 948 ​ ​ 11,012 ​ ​ 3,233 ​ ​ 17,276 ​ ​ — Total Consumer ​ $ 88,133 ​ $ 361,748 ​ $ 301,493 ​ $ 188,246 ​ $ 174,920 ​ $ 431,647 ​ $ 671,109 ​ $ 2,217,296 ​ $ —

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated Remaining Amortization Expense of Intangibles	As of March 31, 2020, the estimated remaining amortization expense of intangibles is as follows for the years ending (dollars in thousands): ​ ​ ​ ​ For the remaining nine months of 2020 $ 12,113 2021 ​ ​ 13,874 2022 ​ ​ 11,490 2023 ​ ​ 9,687 2024 ​ ​ 7,818 Thereafter ​ ​ 14,316 Total estimated amortization expense ​ $ 69,298

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Maturity of Operating Leases	Maturities of operating lease liabilities as of March 31, 2020 are as follows for the years ending (dollars in thousands): ​ ​ ​ ​ For the remaining nine months of 2020 $ 9,714 2021 ​ 11,523 2022 ​ 10,545 2023 ​ 9,561 2024 ​ 8,232 2025 ​ ​ 6,040 Thereafter ​ 15,088 Total future lease payments ​ 70,703 Less: Interest ​ 6,533 Present value of lease liabilities ​ $ 64,171
Other Lease Information	​ Other lease information is as follows as of March 31, 2020 and December 31, 2019 and for the three months ended March 31, 2020 and 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 ​ Lease Term and Discount Rate of Operating leases: ​ ​ ​ ​ ​ ​ Weighted-average remaining lease term (years) ​ 7.20 ​ ​ ​ 7.36 ​ Weighted-average discount rate (1) ​ 2.56 % ​ ​ 2.69 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ Cash paid for amounts included in measurement of lease liabilities: 2020 ​ ​ 2019 ​ Operating Cash Flows from Operating Leases ​ $ 3,517 ​ ​ $ 3,468 ​ Right-of-use assets obtained in exchange for lease obligations: ​ ​ ​ ​ ​ ​ Operating leases ​ 1,216 ​ ​ ​ 4,346 ​ (1) An incremental borrowing rate is used based on information available at commencement date of lease.

BORROWINGS (Tables)

BORROWINGS (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Short-Term Borrowings	Total short-term borrowings consist of the following as of March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2020 ​ 2019 Securities sold under agreements to repurchase ​ $ 56,781 ​ $ 66,053 ​ Federal Funds Purchased ​ ​ 25,000 ​ ​ — ​ FHLB advances ​ 355,000 ​ 370,200 ​ Total short-term borrowings ​ $ 436,781 ​ $ 436,253 ​ ​ ​ ​ ​ ​ ​ ​ ​ Average outstanding balance during the period ​ $ 364,931 ​ $ 673,116 ​ Average interest rate (during the period) ​ 1.48 % 2.30 % Average interest rate at end of period ​ 1.30 % 1.52 %
Trust Preferred Capital Notes Qualify for Tier 2 Capital	The trust preferred capital notes currently qualify for Tier 2 capital of the Company for regulatory purposes. The Company’s trust preferred capital notes consist of the following as of March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust ​ ​ ​ ​ ​ ​ ​ Preferred ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capital ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ Securities (1) ​ Investment (1) ​ 3-Month LIBOR ​ Rate (2) ​ Maturity Trust Preferred Capital Note - Statutory Trust I ​ $ 22,500,000 ​ $ 696,000 2.75 % 4.20 % 6/17/2034 Trust Preferred Capital Note - Statutory Trust II ​ 36,000,000 ​ 1,114,000 1.40 % 2.85 % 6/15/2036 VFG Limited Liability Trust I Indenture ​ 20,000,000 ​ 619,000 2.73 % 4.18 % 3/18/2034 FNB Statutory Trust II Indenture ​ 12,000,000 ​ 372,000 3.10 % 4.55 % 6/26/2033 Gateway Capital Statutory Trust I ​ 8,000,000 ​ 248,000 3.10 % 4.55 % 9/17/2033 Gateway Capital Statutory Trust II ​ 7,000,000 ​ 217,000 2.65 % 4.10 % 6/17/2034 Gateway Capital Statutory Trust III ​ 15,000,000 ​ 464,000 1.50 % 2.95 % 5/30/2036 Gateway Capital Statutory Trust IV ​ 25,000,000 ​ 774,000 1.55 % 3.00 % 7/30/2037 MFC Capital Trust II ​ 5,000,000 ​ 155,000 2.85 % 4.30 % 1/23/2034 Total ​ $ 150,500,000 ​ $ 4,659,000 (1) 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. (2) Rate as of March 31, 2020.
Advances from the FHLB	As of March 31, 2020, the Company had long-term advances from the FHLB consisting of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ 3-Month ​ Interest ​ ​ ​ ​ ​ Long-term Type ​ LIBOR ​ Rate (1) ​ Maturity Date ​ Advance Amount Convertible Flipper (0.75) % 0.70 % 8/17/2029 ​ $ 50,000 Convertible Flipper (0.50) % 0.95 % 5/15/2024 ​ 200,000 Convertible Flipper (0.75) % 0.70 % 5/22/2029 ​ 150,000 Convertible Flipper (0.75) % 0.70 % 5/30/2029 ​ 50,000 Convertible Flipper ​ (0.75) % 0.70 % 6/21/2029 ​ ​ 100,000 Fixed Rate Convertible ​ - ​ 1.78 % 10/26/2028 ​ ​ 200,000 Fixed Rate Hybrid ​ - ​ 1.58 % 5/18/2020 ​ ​ 20,000 Fixed Rate Credit ​ - ​ 1.54 % 10/2/2020 ​ ​ 10,000 ​ ​ ​ ​ ​ ​ ​ ​ $ 780,000 (1) Interest rates calculated using non-rounded numbers. As of December 31, 2019, the Company had long-term advances from the FHLB consisting of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Spread to ​ ​ ​ ​ ​ ​ 3-Month ​ Interest ​ ​ ​ ​ ​ Long-term Type ​ LIBOR ​ Rate (1) ​ Maturity Date ​ Advance Amount ​ Convertible Flipper (0.75) % 1.16 % 8/17/2029 ​ $ 50,000 Convertible Flipper (0.50) % 1.41 % 5/15/2024 ​ 200,000 Convertible Flipper (0.75) % 1.16 % 5/22/2029 ​ 150,000 Convertible Flipper (0.75) % 1.16 % 5/30/2029 ​ 50,000 Convertible Flipper (0.75) % 1.16 % 6/21/2029 ​ 100,000 Fixed Rate Convertible - ​ 1.78 % 10/26/2028 ​ 200,000 Fixed Rate Hybrid - ​ 1.58 % 5/18/2020 ​ 20,000 Fixed Rate Credit ​ - ​ 1.54 % 10/2/2020 ​ ​ 10,000 ​ ​ ​ ​ ​ ​ ​ ​ $ 780,000 (1) Interest rates calculated using non-rounded numbers. ​
Contractual Maturities of Long-Term Debt	As of March 31, 2020, the contractual maturities of long-term debt are as follows for the years ending (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ ​ ​ ​ ​ ​ ​ Fair Value ​ ​ ​ ​ ​ Capital ​ Subordinated ​ FHLB ​ Premium ​ Total Long-term ​ ​ Notes ​ Debt ​ Advances ​ (Discount) (1) ​ Borrowings For the remaining nine months of 2020 ​ $ — ​ $ — ​ $ 30,000 ​ $ (646) ​ $ 29,354 2021 ​ — ​ — ​ — ​ (1,008) ​ (1,008) 2022 ​ — ​ — ​ — ​ (1,030) ​ (1,030) 2023 ​ — ​ — ​ — ​ (1,053) ​ (1,053) 2024 ​ — ​ — ​ 200,000 ​ (1,078) ​ 198,922 Thereafter ​ 155,159 ​ 158,500 ​ 550,000 ​ (11,161) ​ 852,498 Total long-term borrowings ​ $ 155,159 ​ $ 158,500 ​ $ 780,000 ​ $ (15,976) ​ $ 1,077,683 (1) Includes discount on issued subordinated notes.

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Balances of Commitments and Contingencies	The following table presents the balances of commitments and contingencies (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 Commitments with off-balance sheet risk: ​ ​ Commitments to extend credit (1) ​ $ 4,605,213 ​ $ 4,691,272 Standby letters of credit ​ 165,371 ​ 209,658 Total commitments with off-balance sheet risk ​ $ 4,770,584 ​ $ 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pledged Assets as of March 31, 2020 ​ ​ ​ ​ ​ ​ AFS HTM ​ ​ ​ ​ ​ ​ Cash ​ Securities (1) ​ Securities (1) ​ Loans (2) ​ Total Public deposits ​ $ — ​ $ 455,201 ​ $ 314,953 ​ $ — ​ $ 770,154 Repurchase agreements ​ — ​ 98,445 ​ — ​ — ​ 98,445 FHLB advances ​ — ​ 61,129 ​ — ​ 4,107,411 ​ 4,168,540 Derivatives ​ 246,430 ​ 1,091 ​ — ​ — ​ 247,521 Fed Funds ​ ​ — ​ ​ — ​ ​ — ​ ​ 319,914 ​ ​ 319,914 Other purposes ​ — ​ 118,597 ​ 9,037 ​ — ​ 127,634 Total pledged assets ​ $ 246,430 ​ $ 734,463 ​ $ 323,990 ​ $ 4,427,325 ​ $ 5,732,208 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (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)	3 Months Ended
	Mar. 31, 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 March 31, 2020 and December 31, 2019, segregated by derivatives that are considered accounting hedges and those that are not (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 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 ​ 131,961 ​ 1 ​ 14,769 ​ 133,078 ​ 182 ​ 6,256 Derivatives not designated as accounting hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loan Swaps : ​ ​ ​ ​ ​ ​ Pay fixed - receive floating interest rate swaps ​ 1,800,795 ​ — ​ 174,704 ​ 1,575,149 ​ 753 ​ 53,592 Pay floating - receive fixed interest rate swaps ​ 1,800,795 ​ 174,704 ​ — ​ 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 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) ​ $ 194,899 ​ $ 7,990 ​ $ 206,799 ​ $ 4,072 Loans ​ 81,961 ​ 6,734 ​ 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 March 31, 2020 and December 31, 2019, the amortized cost basis of this portfolio was $ 195 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)	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Change in Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income (Loss) The change in accumulated other comprehensive income (loss) for the three months ended March 31, 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 - December 31, 2019 ​ $ 37,877 ​ $ 75 ​ $ (782) ​ $ (1,595) ​ $ 35,575 Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 14,687 ​ ​ — ​ ​ (699) ​ ​ (1,289) ​ 12,699 Amounts reclassified from AOCI into earnings ​ (1,529) ​ ​ (5) ​ ​ 1,481 ​ ​ 108 ​ 55 Net current period other comprehensive income (loss) ​ 13,158 ​ (5) ​ 782 ​ (1,181) ​ 12,754 Balance - March 31, 2020 ​ $ 51,035 ​ $ 70 ​ $ — ​ $ (2,776) ​ $ 48,329 ​ The change in accumulated other comprehensive income (loss) for the three months ended March 31, 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 - December 31, 2018 ​ $ (5,949) ​ $ 95 ​ $ (3,393) ​ $ (1,026) ​ $ (10,273) Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other comprehensive income (loss) before reclassification ​ 20,081 ​ ​ — ​ ​ (1,460) ​ ​ — ​ ​ 18,621 Amounts reclassified from AOCI into earnings ​ (85) ​ ​ (5) ​ ​ 120 ​ ​ 19 ​ ​ 49 Net current period other comprehensive income (loss) ​ 19,996 ​ (5) ​ (1,340) ​ 19 ​ 18,670 Balance - March 31, 2019 ​ $ 14,047 ​ $ 90 ​ $ (4,733) ​ $ (1,007) ​ $ 8,397

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at March 31, 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 ​ $ — ​ $ 17,962 ​ $ — ​ $ 17,962 Obligations of states and political subdivisions ​ — ​ 546,726 ​ — ​ 546,726 Corporate and other bonds (1) ​ — ​ 120,968 ​ — ​ 120,968 Mortgage-backed securities ​ — ​ 1,284,157 ​ — ​ 1,284,157 Other securities ​ — ​ 3,090 ​ — ​ 3,090 Loans held for sale ​ — ​ 76,690 ​ — ​ 76,690 Derivatives: ​ ​ ​ ​ Interest rate swap ​ — ​ 174,704 ​ — ​ 174,704 Fair value hedges ​ — ​ 1 ​ — ​ 1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ Derivatives: ​ ​ ​ ​ Interest rate swap ​ $ — ​ $ 174,704 ​ $ — ​ $ 174,704 Fair value hedges ​ — ​ 14,769 ​ — ​ 14,769 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 March 31, 2020 and December 31, 2019 are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at March 31, 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 ​ $ 504,959 ​ $ 504,959 ​ $ — ​ $ — ​ $ 504,959 AFS securities ​ 1,972,903 ​ — ​ 1,972,903 ​ — ​ 1,972,903 HTM securities ​ 552,176 ​ — ​ 588,984 ​ 15,796 ​ 604,780 Restricted stock ​ 130,227 ​ — ​ 130,227 ​ — ​ 130,227 Loans held for sale ​ 76,690 ​ — ​ 76,690 ​ — ​ 76,690 Net loans ​ 12,627,798 ​ — ​ — ​ 12,413,731 ​ 12,413,731 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 174,704 ​ — ​ 174,704 ​ — ​ 174,704 Fair value hedges ​ 1 ​ — ​ 1 ​ — ​ 1 Accrued interest receivable ​ 46,678 ​ — ​ 46,678 ​ — ​ 46,678 BOLI ​ 324,980 ​ — ​ 324,980 ​ — ​ 324,980 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LIABILITIES ​ ​ ​ ​ ​ Deposits ​ $ 13,553,035 ​ $ — ​ $ 13,610,143 ​ $ — ​ $ 13,610,143 Borrowings ​ 1,514,464 ​ — ​ 1,501,474 ​ — ​ 1,501,474 Accrued interest payable ​ 7,532 ​ — ​ 7,532 ​ — ​ 7,532 Derivatives: ​ ​ ​ ​ ​ Interest rate swap ​ 174,704 ​ — ​ 174,704 ​ — ​ 174,704 Fair value hedges ​ 14,769 ​ — ​ 14,769 ​ — ​ 14,769 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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)	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Noninterest income disaggregated by major source, for the three months ended March 31, 2020 and 2019, consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ March 31, ​ ​ 2020 ​ 2019 Noninterest income: ​ ​ Deposit Service Charges (1) : ​ ​ Overdraft fees ​ $ 5,765 ​ $ 5,782 Maintenance fees & other ​ 1,813 ​ 1,376 Other service charges, commissions, and fees (1) ​ 1,624 ​ 1,664 Interchange fees (1) ​ 1,625 ​ 5,045 Fiduciary and asset management fees (1) : ​ ​ ​ ​ Trust asset management fees ​ 2,827 ​ 1,339 Registered advisor management fees ​ 2,088 ​ 2,875 Brokerage management fees ​ 1,069 ​ 840 Mortgage banking income ​ 2,022 ​ 1,454 Gains (losses) on securities transactions ​ 1,936 ​ 151 Bank owned life insurance income ​ 2,049 ​ 2,055 Loan-related interest rate swap fees ​ 3,948 ​ 1,460 Other operating income (2) ​ 2,141 ​ 897 Total noninterest income (3) ​ $ 28,907 ​ $ 24,938 (1) Income within scope of Topic 606. (2) Entire balance is within scope of Topic 606 for the three months ended March 31, 2020. Includes income within the scope of Topic 606 of $813,000 for the three months ended March 31, 2019 ; the remaining balance is outside the scope of Topic 606. (3) Noninterest income for the discontinued mortgage segment is reported in Note 14 "Segment Reporting & Discontinued Operations."

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 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 stockholders for the three months ended March 31, 2020 and 2019 (dollars in thousands except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ 2020 ​ 2019 Net Income: ​ ​ ​ ​ ​ ​ Income from continuing operations ​ $ 7,089 ​ $ 35,716 Income (loss) from discontinued operations ​ — ​ (85) Net income available to common stockholders ​ $ 7,089 ​ $ 35,631 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average shares outstanding, basic ​ 79,290 ​ 76,472 Dilutive effect of stock awards and warrants ​ 27 ​ 61 Weighted average shares outstanding, diluted ​ 79,317 ​ 76,533 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS: ​ ​ EPS from continuing operations ​ $ 0.09 ​ $ 0.47 EPS from discontinued operations ​ — ​ — EPS available to common stockholders ​ $ 0.09 ​ $ 0.47 ​ ​ ​ ​ ​ ​ ​ Diluted EPS: ​ ​ EPS from continuing operations ​ $ 0.09 ​ $ 0.47 EPS from discontinued operations ​ — ​ — EPS available to common stockholders ​ $ 0.09 ​ $ 0.47

SEGMENT REPORTING & DISCONTIN_2

SEGMENT REPORTING & DISCONTINUED OPERATIONS (Tables)	3 Months Ended
	Mar. 31, 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 months ended March 31, 2019 (dollars in thousands): ​ ​ ​ ​ Three Months Ended ​ March 31, 2019 Net interest income $ — Provision for credit losses ​ — Net interest income after provision for credit losses ​ — Noninterest income ​ 1 Noninterest expenses ​ 116 Income before income taxes ​ (115) Income tax expense (benefit) ​ (30) Net income (loss) on discontinued operations $ (85)

ACCOUNTING POLICIES (Narrative)

ACCOUNTING POLICIES (Narrative) (Details) $ in Thousands	Apr. 30, 2019USD ($)	Feb. 01, 2019USD ($)shares	Mar. 31, 2020USD ($)item	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Accounting Policies [Line Items]
Number of bank branches | item			149
Number of ATM's | item			170
Impairment charges for goodwill	$ 0		$ 0
Goodwill			935,560		$ 935,560
Loans held for investment, accrued interest receivable			31,100
HTM securities, Accrued interest receivable			5,200
Cash paid in acquisition			$ 0	$ 12
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%
Minimum
Accounting Policies [Line Items]
Intangible assets, amortization period (years)			4 years
Maximum
Accounting Policies [Line Items]
Intangible assets, amortization period (years)			10 years
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

ACCOUNTING POLICIES - New Accou

ACCOUNTING POLICIES - New Accounting Standards (Narrative) (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans	$ 89,778	$ 141,043	$ 42,294	$ 40,827	$ 41,045
Increase in allowance for credit losses on Purchased with Credit Deterioration (PCD) assets	2,400	2,386
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adoption of new guidance		$ (39,053)
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

ACCOUNTING POLICIES - New Acc_2

ACCOUNTING POLICIES - New Accounting Standards (Illustration of the Impact of ASC 326) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Item Effected [Line Items]
Allowance for credit losses on loans	$ 141,043	$ 89,778	$ 42,294	$ 40,827	$ 41,045
Total Allowance for credit losses	141,043	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	77,843	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	$ 63,200	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	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition [Line Items]
Cash paid in acquisition		$ 0	$ 12
Merger-related costs		0	18,122
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		$ 0	$ 17,800

SECURITIES (Narrative) (Details

SECURITIES (Narrative) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 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	$ 36,400,000	$ 75,000,000
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss	1,042,000	696,000
Securities available for sale, at fair value	1,972,903,000	$ 1,945,445,000
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	$ 63,200,000	$ 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	20	47
Non-agency collateralized mortgage obligations | AAA
Schedule of Investments [Line Items]
Securities available for sale, at fair value	$ 40,600,000
Securities available for sale, unrealized losses	$ 1,300,000
Percentage of Simplified Supervisory Formula Approach (SSFA) rating	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	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	$ 1,900,313	$ 1,893,427
Gross Unrealized Gains	81,556	53,918
Gross Unrealized (Losses)	(8,966)	(1,900)
Total AFS securities, Estimated Fair Value	1,972,903	1,945,445
U.S. government and agency securities
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	17,631	21,149
Gross Unrealized Gains	365	209
Gross Unrealized (Losses)	(34)	(38)
Total AFS securities, Estimated Fair Value	17,962	21,320
Obligations of states and political subdivisions
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	515,914	421,344
Gross Unrealized Gains	31,367	25,776
Gross Unrealized (Losses)	(555)	(29)
Total AFS securities, Estimated Fair Value	546,726	447,091
Corporate and other bonds
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	122,232	134,342
Gross Unrealized Gains	2,185	1,991
Gross Unrealized (Losses)	(3,449)	(374)
Total AFS securities, Estimated Fair Value	120,968	135,959
Total mortgage-back securities
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	1,241,446	1,313,513
Gross Unrealized Gains	47,639	25,942
Gross Unrealized (Losses)	(4,928)	(1,459)
Total AFS securities, Estimated Fair Value	1,284,157	1,337,996
Commercial
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	353,684	416,904
Gross Unrealized Gains	13,819	8,786
Gross Unrealized (Losses)	(56)	(643)
Total AFS securities, Estimated Fair Value	367,447	425,047
Residential
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	887,762	896,609
Gross Unrealized Gains	33,820	17,156
Gross Unrealized (Losses)	(4,872)	(816)
Total AFS securities, Estimated Fair Value	916,710	912,949
Other securities
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]
Total AFS securities	3,090	3,079
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Total AFS securities, Estimated Fair Value	$ 3,090	$ 3,079

SECURITIES (Schedule of Gross U

SECURITIES (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	$ 220,748,000	$ 198,348,000
Less than 12 Months, Unrealized Losses	(7,924,000)	(1,204,000)
More than 12 Months, Fair Value	36,421,000	75,035,000
More than 12 Months, Unrealized Losses	(1,042,000)	(696,000)
Total, Fair Value	257,169,000	273,383,000
Unrealized Losses, Total	(8,966,000)	(1,900,000)
U.S. government and agency securities
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	5,338,000	7,638,000
Less than 12 Months, Unrealized Losses	(23,000)	(38,000)
More than 12 Months, Fair Value	1,619,000	0
More than 12 Months, Unrealized Losses	(11,000)	0
Total, Fair Value	6,957,000	7,638,000
Unrealized Losses, Total	(34,000)	(38,000)
Obligations of states and political subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	24,757,000	4,526,000
Less than 12 Months, Unrealized Losses	(555,000)	(29,000)
More than 12 Months, Fair Value	0	0
More than 12 Months, Unrealized Losses	0	0
Total, Fair Value	24,757,000	4,526,000
Unrealized Losses, Total	(555,000)	(29,000)
Corporate and other bonds
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	40,409,000	17,323,000
Less than 12 Months, Unrealized Losses	(2,854,000)	(83,000)
More than 12 Months, Fair Value	19,922,000	19,901,000
More than 12 Months, Unrealized Losses	(595,000)	(291,000)
Total, Fair Value	60,331,000	37,224,000
Unrealized Losses, Total	(3,449,000)	(374,000)
Total mortgage-back securities
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	150,244,000	168,861,000
Less than 12 Months, Unrealized Losses	(4,492,000)	(1,054,000)
More than 12 Months, Fair Value	14,880,000	55,134,000
More than 12 Months, Unrealized Losses	(436,000)	(405,000)
Total, Fair Value	165,124,000	223,995,000
Unrealized Losses, Total	(4,928,000)	(1,459,000)
Commercial
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	14,667,000	54,714,000
Less than 12 Months, Unrealized Losses	(56,000)	(554,000)
More than 12 Months, Fair Value	0	14,966,000
More than 12 Months, Unrealized Losses	0	(89,000)
Total, Fair Value	14,667,000	69,680,000
Unrealized Losses, Total	(56,000)	(643,000)
Residential
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, Fair Value	135,577,000	114,147,000
Less than 12 Months, Unrealized Losses	(4,436,000)	(500,000)
More than 12 Months, Fair Value	14,880,000	40,168,000
More than 12 Months, Unrealized Losses	(436,000)	(316,000)
Total, Fair Value	150,457,000	154,315,000
Unrealized Losses, Total	$ (4,872,000)	$ (816,000)

SECURITIES (Amortized Cost of A

SECURITIES (Amortized Cost of AFS Securities by Security Type and Credit Rating) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	$ 1,900,313	$ 1,893,427
Standard & Poor's AAA/AA/A | Moody's AAA/AA/A
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	588,018
Standard & Poor's BBB/BB/B | Moody's BBB/BB/B
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	23,886
Standard Poors Not Rated - Agency [Member] | Moody's Not Rated - Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	1,170,237
Standard Poors Not Rated - Non-Agency [Member] | Moody's Not Rated - Non-Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	118,172
U.S. government and agency securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	17,631	21,149
U.S. government and agency securities | Standard & Poor's AAA/AA/A | Moody's AAA/AA/A
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	2,497
U.S. government and agency securities | Standard & Poor's BBB/BB/B | Moody's BBB/BB/B
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
U.S. government and agency securities | Standard Poors Not Rated - Agency [Member] | Moody's Not Rated - Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	15,134
U.S. government and agency securities | Standard Poors Not Rated - Non-Agency [Member] | Moody's Not Rated - Non-Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
Obligations of states and political subdivisions
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	515,914	421,344
Obligations of states and political subdivisions | Standard & Poor's AAA/AA/A | Moody's AAA/AA/A
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	514,374
Obligations of states and political subdivisions | Standard & Poor's BBB/BB/B | Moody's BBB/BB/B
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	1,033
Obligations of states and political subdivisions | Standard Poors Not Rated - Agency [Member] | Moody's Not Rated - Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
Obligations of states and political subdivisions | Standard Poors Not Rated - Non-Agency [Member] | Moody's Not Rated - Non-Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	507
Corporate and other bonds
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	122,232	134,342
Corporate and other bonds | Standard & Poor's AAA/AA/A | Moody's AAA/AA/A
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	32,288
Corporate and other bonds | Standard & Poor's BBB/BB/B | Moody's BBB/BB/B
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	22,853
Corporate and other bonds | Standard Poors Not Rated - Agency [Member] | Moody's Not Rated - Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
Corporate and other bonds | Standard Poors Not Rated - Non-Agency [Member] | Moody's Not Rated - Non-Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	67,091
Total mortgage-back securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	1,241,446	1,313,513
Total mortgage-back securities | Standard & Poor's AAA/AA/A | Moody's AAA/AA/A
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	38,859
Total mortgage-back securities | Standard & Poor's BBB/BB/B | Moody's BBB/BB/B
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
Total mortgage-back securities | Standard Poors Not Rated - Agency [Member] | Moody's Not Rated - Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	1,153,495
Total mortgage-back securities | Standard Poors Not Rated - Non-Agency [Member] | Moody's Not Rated - Non-Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	49,092
Other securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	3,090	$ 3,079
Other securities | Standard & Poor's AAA/AA/A | Moody's AAA/AA/A
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
Other securities | Standard & Poor's BBB/BB/B | Moody's BBB/BB/B
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	0
Other securities | Standard Poors Not Rated - Agency [Member] | Moody's Not Rated - Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	1,608
Other securities | Standard Poors Not Rated - Non-Agency [Member] | Moody's Not Rated - Non-Agency [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
AFS Securities, Amortized Cost	$ 1,482

SECURITIES (Schedule of Amortiz

SECURITIES (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
AFS Securities [Abstract]
Due in one year or less, Amortized Cost	$ 24,916	$ 35,177
Due in one year or less, Estimated Fair Value	25,080	35,329
Due after one year through five years, Amortized Cost	157,141	164,605
Due after one year through five years, Estimated Fair Value	162,774	166,873
Due after five years through ten years, Amortized Cost	221,929	249,713
Due after five years through ten years, Estimated Fair Value	228,121	254,790
Due after ten years, Amortized Cost	1,496,327	1,443,932
Due after ten years, Estimated Fair Value	1,556,928	1,488,453
Total AFS securities	1,900,313	1,893,427
Total AFS securities, Estimated Fair Value	1,972,903	1,945,445
HTM Securities [Abstract]
Due in one year or less, Carrying Value	0	502
Due in one year or less, Estimated Fair Value	0	504
Due after one year through five years, Carrying Value	10,198	10,258
Due after one year through five years, Estimated Fair Value	10,411	10,539
Due after five years through ten years, Carrying Value	1,760	1,768
Due after five years through ten years, Estimated Fair Value	1,767	1,800
Due after ten years, Carrying Value	540,218	542,616
Due after ten years, Estimated Fair Value	592,602	590,660
Total HTM Securities	552,176	555,144
Total HTM securities, Estimated Fair Value	$ 604,780	$ 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	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	$ 552,176	$ 555,144
Gross Unrealized Gains	52,815	48,359
Gross Unrealized Losses	(211)	0
Held-to-maturity Securities, Fair Value	604,780	603,503
U.S. government and agency securities
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	2,797	2,813
Gross Unrealized Gains	0	26
Gross Unrealized Losses	(69)	0
Held-to-maturity Securities, Fair Value	2,728	2,839
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	543,517	545,148
Gross Unrealized Gains	52,815	48,274
Gross Unrealized Losses	0	0
Held-to-maturity Securities, Fair Value	596,332	593,422
Total mortgage-back securities
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	5,862	7,183
Gross Unrealized Gains	0	59
Gross Unrealized Losses	(142)	0
Held-to-maturity Securities, Fair Value	5,720	7,242
Commercial
Schedule of Held-to-maturity Securities [Line Items]
Total HTM Securities	5,862	7,183
Gross Unrealized Gains	0	59
Gross Unrealized Losses	(142)	0
Held-to-maturity Securities, Fair Value	5,720	7,242
Residential
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	Mar. 31, 2020USD ($)
HTM Securities, Amortized Cost	$ 552,176
Moody's AAA/AA/A | Standard & Poor's AAA/AA/A
HTM Securities, Amortized Cost	536,747
Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]
HTM Securities, Amortized Cost	8,659
Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]
HTM Securities, Amortized Cost	6,770
U.S. government and agency securities
HTM Securities, Amortized Cost	2,797
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	2,797
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	543,517
Obligations of states and political subdivisions | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A
HTM Securities, Amortized Cost	536,747
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	6,770
Total mortgage-back securities
HTM Securities, Amortized Cost	5,862
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	5,862
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
	Mar. 31, 2020	Mar. 31, 2019
Securities [Abstract]
Gross realized gains	$ 2,164	$ 1,213
Gross realized losses	(228)	(1,062)
Gains on securities transactions, net	1,936	151
Proceeds from sales of securities	$ 120,701	$ 208,249

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	Mar. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	$ 12,768,841	$ 12,610,936
Construction and Land Development
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	1,318,252	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	2,051,904	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	3,328,012	3,286,098
Multifamily Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	679,390	633,743
Commercial and Industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	2,177,932	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	721,800	724,337
Residential 1-4 Family - Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	854,550	890,503
Residential 1-4 Family - Revolving
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	652,135	659,504
Auto
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	358,039	350,419
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	352,572	372,853
Other Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net of deferred fees and costs	$ 274,255	$ 287,279

LOANS AND ALLOWANCE FOR LOAN _4

LOANS AND ALLOWANCE FOR LOAN LOSSES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 44,022	$ 45,204	$ 28,232
Nonaccrual interest income	$ 0
Period for restructured loan to be considered default	90 days
Acquired performing loan portfolio	$ 12,768,841		12,610,936
Allowance for credit losses on loans	141,043	89,778	42,294	$ 40,827	$ 41,045
Troubled Debt Restructurings (TDRs)	20,356		19,496
Total Allowance for credit losses	141,043	$ 94,838	42,294
Troubled Debt Restructurings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings (TDRs)	20,400
Total Allowance for credit losses	1,900
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	84,700		86,681
Allowance for credit losses on loans	3,800		217
Purchased impaired loans (gross)			$ 104,900
COVID-19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings (TDRs)	$ 75,000

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	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 12,649,743		$ 12,419,378
Greater Than 90 Days and Still Accruing	12,876		13,396
Nonaccrual	44,022	$ 45,204	28,232
Total Loans	12,768,841		12,610,936
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	48,868		50,453
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	13,332		12,796
Purchased Impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			70,267
Total Loans	84,700		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	1,311,599		1,231,043
Greater Than 90 Days and Still Accruing	317		189
Nonaccrual	3,234	4,060	3,703
Total Loans	1,318,252		1,250,924
Construction and Land Development | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,786		4,563
Construction and Land Development | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	316		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	2,026,741		2,001,074
Greater Than 90 Days and Still Accruing	1,690		1,062
Nonaccrual	11,250	13,889	6,003
Total Loans	2,051,904		2,041,243
Commercial Real Estate - Owner Occupied | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	10,779		3,482
Commercial Real Estate - Owner Occupied | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,444		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	3,319,481		3,269,244
Greater Than 90 Days and Still Accruing	2,037		1,451
Nonaccrual	1,642	1,368	381
Total Loans	3,328,012		3,286,098
Commercial Real Estate - Non-Owner Occupied | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,087		457
Commercial Real Estate - Non-Owner Occupied | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,765		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	676,343		632,952
Greater Than 90 Days and Still Accruing	377		474
Nonaccrual	53	0	0
Total Loans	679,390		633,743
Multifamily Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	623		223
Multifamily Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,994		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	2,167,873		2,099,974
Greater Than 90 Days and Still Accruing	517		449
Nonaccrual	3,431	3,037	1,735
Total Loans	2,177,932		2,114,033
Commercial and Industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,893		8,698
Commercial and Industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,218		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	708,772		703,471
Greater Than 90 Days and Still Accruing	777		674
Nonaccrual	7,040	6,492	4,301
Total Loans	721,800		724,337
Residential 1-4 Family - Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,145		1,479
Residential 1-4 Family - Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,066		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	820,818		842,667
Greater Than 90 Days and Still Accruing	4,407		4,515
Nonaccrual	13,088	13,117	9,292
Total Loans	854,550		890,503
Residential 1-4 Family - Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	15,667		16,244
Total Loans	15,667
Residential 1-4 Family - Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	570		3,072
Total Loans	570
Residential 1-4 Family - Consumer | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	4,407
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	640,989		637,966
Greater Than 90 Days and Still Accruing	2,005		3,357
Nonaccrual	3,547	2,490	2,080
Total Loans	652,135		659,504
Residential 1-4 Family - Revolving | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,308		10,190
Total Loans	4,308
Residential 1-4 Family - Revolving | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,286		1,784
Total Loans	1,286
Residential 1-4 Family - Revolving | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,005
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	355,084		346,819
Greater Than 90 Days and Still Accruing	127		272
Nonaccrual	550	565	563
Total Loans	358,039		350,419
Auto | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,967		2,525
Total Loans	1,967
Auto | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	311		236
Total Loans	311
Auto | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	127
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	348,953		367,794
Greater Than 90 Days and Still Accruing	622		953
Nonaccrual	91	88	77
Total Loans	352,572		372,853
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,612		2,128
Total Loans	1,612
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,294		1,233
Total Loans	1,294
Consumer | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	622
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	273,090		286,374
Greater Than 90 Days and Still Accruing	0		0
Nonaccrual	96	$ 98	97
Total Loans	274,255		287,279
Other Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1		464
Other Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 1,068		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	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 44,022	$ 45,204	$ 28,232
Nonaccrual With No Allowance For Credit Losses	8,537
Loans Past Due Over 89 Days Still Accruing	12,876		13,396
Construction and Land Development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,234	4,060	3,703
Nonaccrual With No Allowance For Credit Losses	1,985
Loans Past Due Over 89 Days Still Accruing	317		189
Commercial Real Estate - Owner Occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	11,250	13,889	6,003
Nonaccrual With No Allowance For Credit Losses	3,591
Loans Past Due Over 89 Days Still Accruing	1,690		1,062
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,642	1,368	381
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	2,037		1,451
Multifamily Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	53	0	0
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	377		474
Commercial and Industrial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,431	3,037	1,735
Nonaccrual With No Allowance For Credit Losses	93
Loans Past Due Over 89 Days Still Accruing	517		449
Residential 1-4 Family - Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	7,040	6,492	4,301
Nonaccrual With No Allowance For Credit Losses	1,739
Loans Past Due Over 89 Days Still Accruing	777		674
Residential 1-4 Family - Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	13,088	13,117	9,292
Nonaccrual With No Allowance For Credit Losses	1,069
Loans Past Due Over 89 Days Still Accruing	4,407		4,515
Residential 1-4 Family - Revolving
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,547	2,490	2,080
Nonaccrual With No Allowance For Credit Losses	60
Loans Past Due Over 89 Days Still Accruing	2,005		3,357
Auto
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	550	565	563
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	127		272
Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	91	88	77
Nonaccrual With No Allowance For Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	622		953
Other Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	96	$ 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
	Mar. 31, 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	$ 59,766
Interest Income Recognized	413
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	9,425
Interest Income Recognized	39
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	11,554
Interest Income Recognized	105
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	6,956
Interest Income Recognized	59
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	2,224
Interest Income Recognized	14
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	6,475
Interest Income Recognized	32
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	18,257
Interest Income Recognized	114
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	600
Auto
Recorded Investment
Loans with a specific allowance		563
Unpaid Principal Balance
Loans with a specific allowance		879
Related Allowance		221
Average Investment	3,472
Interest Income Recognized	40
Consumer
Recorded Investment
Loans with a specific allowance		168
Unpaid Principal Balance
Loans with a specific allowance		336
Related Allowance		46
Average Investment	215
Interest Income Recognized	2
Other Commercial
Recorded Investment
Loans with a specific allowance		562
Unpaid Principal Balance
Loans with a specific allowance		567
Related Allowance		$ 30
Average Investment	588
Interest Income Recognized	$ 8

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	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)loan
Financing Receivable, Modifications [Line Items]
No. of Loans	128	120
Recorded Investment	$ 20,356	$ 19,496
Outstanding Commitment	$ 0	$ 26
Performing
Financing Receivable, Modifications [Line Items]
No. of Loans	101	96
Recorded Investment	$ 14,865	$ 15,686
Outstanding Commitment	$ 0	$ 26
Performing | Construction and Land Development
Financing Receivable, Modifications [Line Items]
No. of Loans	4	4
Recorded Investment	$ 226	$ 1,114
Outstanding Commitment	$ 0	$ 0
Performing | Commercial Real Estate - Owner Occupied
Financing Receivable, Modifications [Line Items]
No. of Loans	6	6
Recorded Investment	$ 2,223	$ 2,228
Outstanding Commitment	$ 0	$ 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	4	4
Recorded Investment	$ 995	$ 1,020
Outstanding Commitment	$ 0	$ 0
Performing | Residential 1-4 Family - Commercial
Financing Receivable, Modifications [Line Items]
No. of Loans	5	5
Recorded Investment	$ 287	$ 290
Outstanding Commitment	$ 0	$ 0
Performing | Residential 1-4 Family - Consumer
Financing Receivable, Modifications [Line Items]
No. of Loans	74	69
Recorded Investment	$ 9,502	$ 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	4	4
Recorded Investment	$ 26	$ 29
Outstanding Commitment	$ 0	$ 0
Performing | Other Commercial
Financing Receivable, Modifications [Line Items]
No. of Loans	1	1
Recorded Investment	$ 462	$ 464
Outstanding Commitment	$ 0	$ 0
Nonperforming
Financing Receivable, Modifications [Line Items]
No. of Loans	27	24
Recorded Investment	$ 5,491	$ 3,810
Outstanding Commitment	$ 0	$ 0
Nonperforming | Commercial Real Estate - Owner Occupied
Financing Receivable, Modifications [Line Items]
No. of Loans	2	2
Recorded Investment	$ 172	$ 176
Outstanding Commitment	$ 0	$ 0
Nonperforming | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
No. of Loans	1	1
Recorded Investment	$ 517	$ 55
Outstanding Commitment	$ 0	$ 0
Nonperforming | Residential 1-4 Family - Consumer
Financing Receivable, Modifications [Line Items]
No. of Loans	22	19
Recorded Investment	$ 4,747	$ 3,522
Outstanding Commitment	$ 0	$ 0
Nonperforming | Residential 1-4 Family - Revolving
Financing Receivable, Modifications [Line Items]
No. of Loans	2	2
Recorded Investment	$ 55	$ 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
	Mar. 31, 2020USD ($)loan	Mar. 31, 2019USD ($)loan
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	12	11
Recorded Investment at Period End | $	$ 2,315	$ 1,732
Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1	5
Recorded Investment at Period End | $	$ 517	$ 789
Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	11	6
Recorded Investment at Period End | $	$ 1,798	$ 943
Interest rate modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0
Recorded Investment at Period End | $	$ 0
Modified to interest only, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	0
Recorded Investment at Period End | $	$ 0
Construction and Land Development | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1
Recorded Investment at Period End | $	$ 35
Commercial and Industrial | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1	1
Recorded Investment at Period End | $	$ 517	$ 441
Residential 1-4 Family - Commercial | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan		1
Recorded Investment at Period End | $		$ 75
Residential 1-4 Family - Consumer | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan		2
Recorded Investment at Period End | $		$ 263
Residential 1-4 Family - Consumer | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	10	5
Recorded Investment at Period End | $	$ 1,763	$ 937
Consumer | Term modification, at a market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan		1
Recorded Investment at Period End | $		$ 10
Consumer | Term modification, below market rate
Financing Receivable, Modifications [Line Items]
No. of Loans | loan		1
Recorded Investment at Period End | $		$ 6

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	Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Allowance for loan losses:
Balance, beginning of the year	$ 42,294	$ 42,294	$ 41,045
Impact of ASC 326 adoption on non-PCD loans				$ 45,098
Impact of ASC 326 adoption on PCD loans	2,400	2,386
Impact of ASC 326 adoption		47,484
Loans charged off		(7,151)	(5,939)
Recoveries credited to allowance		2,160	1,696
Provision charged to operations		56,256	4,025
Balance, end of period	89,778	141,043	40,827
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				12,768,841	12,610,936
Total ALLL	42,294	141,043	40,827	141,043	42,294
Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	217	217
Balance, end of period		3,800
Loans:
Total Loans				84,700	86,681
Total ALLL	217	217		3,800	217
Construction and Land Development
Allowance for loan losses:
Balance, beginning of the year	5,758	5,758	6,803
Loans charged off			(732)
Recoveries credited to allowance			27
Provision charged to operations			126
Balance, end of period			6,224
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				1,318,252	1,250,924
Total ALLL	5,758	5,758	6,224		5,758
Construction and Land Development | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					10,944
Total ALLL	0	0			0
Commercial Real Estate - Owner Occupied
Allowance for loan losses:
Balance, beginning of the year	3,919	3,919	4,023
Loans charged off			(47)
Recoveries credited to allowance			25
Provision charged to operations			29
Balance, end of period			4,030
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				2,051,904	2,041,243
Total ALLL	3,919	3,919	4,030		3,919
Commercial Real Estate - Owner Occupied | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					27,438
Total ALLL	0	0			0
Commercial Real Estate - Non-Owner Occupied
Allowance for loan losses:
Balance, beginning of the year	9,543	9,543	8,865
Loans charged off			0
Recoveries credited to allowance			89
Provision charged to operations			82
Balance, end of period			9,036
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				3,328,012	3,286,098
Total ALLL	9,543	9,543	9,036		9,543
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					14,565
Total ALLL	0	0			0
Multifamily Real Estate
Allowance for loan losses:
Balance, beginning of the year	632	632	649
Loans charged off			0
Recoveries credited to allowance			85
Provision charged to operations			(74)
Balance, end of period			660
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				679,390	633,743
Total ALLL	632	632	660		632
Multifamily Real Estate | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					94
Total ALLL	0	0			0
Commercial and Industrial
Allowance for loan losses:
Balance, beginning of the year	8,604	8,604	7,636
Loans charged off			(980)
Recoveries credited to allowance			360
Provision charged to operations			395
Balance, end of period			7,411
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				2,177,932	2,114,033
Total ALLL	8,604	8,604	7,411		8,604
Commercial and Industrial | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	217	217
Loans:
Total Loans					1,579
Total ALLL	217	217			217
Residential 1-4 Family - Commercial
Allowance for loan losses:
Balance, beginning of the year	1,365	1,365	1,692
Loans charged off			(66)
Recoveries credited to allowance			87
Provision charged to operations			47
Balance, end of period			1,760
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				721,800	724,337
Total ALLL	1,365	1,365	1,760		1,365
Residential 1-4 Family - Commercial | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					12,205
Total ALLL	0	0			0
Residential 1-4 Family - Consumer
Allowance for loan losses:
Balance, beginning of the year	2,013	2,013	1,492
Loans charged off			(32)
Recoveries credited to allowance			155
Provision charged to operations			117
Balance, end of period			1,732
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				854,550	890,503
Total ALLL	2,013	2,013	1,732		2,013
Residential 1-4 Family - Consumer | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					14,713
Total ALLL	0	0			0
Auto
Allowance for loan losses:
Balance, beginning of the year	1,453	1,453	1,443
Loans charged off			(399)
Recoveries credited to allowance			186
Provision charged to operations			216
Balance, end of period			1,446
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				358,039	350,419
Total ALLL	1,453	1,453	1,446		1,453
Auto | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					4
Total ALLL	0	0			0
Commercial Portfolio
Allowance for loan losses:
Balance, beginning of the year	30,941	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		(2,968)
Recoveries credited to allowance		1,154
Provision charged to operations		42,532
Balance, end of period	37,125	77,843
Loans:
Total Loans				10,551,545
Total ALLL	30,941	77,843		77,843	30,941
Commercial Portfolio | Purchased Impaired
Loans:
Total Loans					86,681
Consumer
Loans:
Total Loans				352,572	372,853
Consumer | Purchased Impaired
Loans:
Total Loans					668
Consumer Portfolio
Allowance for loan losses:
Balance, beginning of the year	11,353	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		(4,183)
Recoveries credited to allowance		1,006
Provision charged to operations		13,724
Balance, end of period	52,653	63,200
Loans:
Total Loans				2,217,296
Total ALLL	11,353	63,200		63,200	11,353
Consumer and all other
Allowance for loan losses:
Balance, beginning of the year	7,684	7,684	7,145
Loans charged off			(3,467)
Recoveries credited to allowance			595
Provision charged to operations			2,849
Balance, end of period			7,122
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	7,684	7,122		7,684
Consumer and all other | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					1,012
Total ALLL	0	0			0
Residential 1-4 Family - Revolving
Allowance for loan losses:
Balance, beginning of the year	1,323	1,323	1,297
Loans charged off			(216)
Recoveries credited to allowance			87
Provision charged to operations			238
Balance, end of period			1,406
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				$ 652,135	659,504
Total ALLL	1,323	1,323	$ 1,406		1,323
Residential 1-4 Family - Revolving | Purchased Impaired
Allowance for loan losses:
Balance, beginning of the year	0	0
Loans:
Total Loans					4,127
Total ALLL	$ 0	$ 0			$ 0

LOANS AND ALLOWANCE FOR LOAN_11

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 12,768,841	$ 12,610,936
Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	70,752
Term Loans Amortized Cost Basis by Origination Year, 2019	476,242
Term Loans Amortized Cost Basis by Origination Year, 2018	436,508
Term Loans Amortized Cost Basis by Origination Year, 2017	134,304
Term Loans Amortized Cost Basis by Origination Year, 2016	62,914
Term Loans Amortized Cost Basis by Origination Year, Prior	105,111
Financing Receivable, Revolving	32,421
Revolving Loans Converted to Term	0
Loans, Total	1,318,252	1,250,924
Construction and Land Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	69,552
Term Loans Amortized Cost Basis by Origination Year, 2019	467,635
Term Loans Amortized Cost Basis by Origination Year, 2018	434,210
Term Loans Amortized Cost Basis by Origination Year, 2017	132,703
Term Loans Amortized Cost Basis by Origination Year, 2016	53,894
Term Loans Amortized Cost Basis by Origination Year, Prior	81,829
Financing Receivable, Revolving	30,573
Revolving Loans Converted to Term	0
Loans, Total	1,270,396
Construction and Land Development | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	1,200
Term Loans Amortized Cost Basis by Origination Year, 2019	8,607
Term Loans Amortized Cost Basis by Origination Year, 2018	1,566
Term Loans Amortized Cost Basis by Origination Year, 2017	865
Term Loans Amortized Cost Basis by Origination Year, 2016	6,615
Term Loans Amortized Cost Basis by Origination Year, Prior	15,627
Financing Receivable, Revolving	1,848
Revolving Loans Converted to Term	0
Loans, Total	36,328
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	732
Term Loans Amortized Cost Basis by Origination Year, 2017	736
Term Loans Amortized Cost Basis by Origination Year, 2016	2,405
Term Loans Amortized Cost Basis by Origination Year, Prior	7,655
Financing Receivable, Revolving	0
Revolving Loans Converted to Term	0
Loans, Total	11,528
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	79,743
Term Loans Amortized Cost Basis by Origination Year, 2019	396,883
Term Loans Amortized Cost Basis by Origination Year, 2018	330,286
Term Loans Amortized Cost Basis by Origination Year, 2017	283,541
Term Loans Amortized Cost Basis by Origination Year, 2016	175,180
Term Loans Amortized Cost Basis by Origination Year, Prior	744,854
Financing Receivable, Revolving	41,417
Revolving Loans Converted to Term	0
Loans, Total	2,051,904	2,041,243
Commercial Real Estate - Owner Occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	79,743
Term Loans Amortized Cost Basis by Origination Year, 2019	391,157
Term Loans Amortized Cost Basis by Origination Year, 2018	312,340
Term Loans Amortized Cost Basis by Origination Year, 2017	266,525
Term Loans Amortized Cost Basis by Origination Year, 2016	147,239
Term Loans Amortized Cost Basis by Origination Year, Prior	681,938
Financing Receivable, Revolving	37,492
Revolving Loans Converted to Term	0
Loans, Total	1,916,434
Commercial Real Estate - Owner Occupied | Watch & Special Mention
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	5,726
Term Loans Amortized Cost Basis by Origination Year, 2018	16,831
Term Loans Amortized Cost Basis by Origination Year, 2017	15,683
Term Loans Amortized Cost Basis by Origination Year, 2016	25,211
Term Loans Amortized Cost Basis by Origination Year, Prior	47,288
Financing Receivable, Revolving	3,551
Revolving Loans Converted to Term	0
Loans, Total	114,290
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	0
Term Loans Amortized Cost Basis by Origination Year, 2018	1,115
Term Loans Amortized Cost Basis by Origination Year, 2017	1,333
Term Loans Amortized Cost Basis by Origination Year, 2016	2,730
Term Loans Amortized Cost Basis by Origination Year, Prior	15,628
Financing Receivable, Revolving	374
Revolving Loans Converted to Term	0
Loans, Total	21,180
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	100,998
Term Loans Amortized Cost Basis by Origination Year, 2019	502,273
Term Loans Amortized Cost Basis by Origination Year, 2018	499,932
Term Loans Amortized Cost Basis by Origination Year, 2017	485,889
Term Loans Amortized Cost Basis by Origination Year, 2016	497,095
Term Loans Amortized Cost Basis by Origination Year, Prior	1,195,746
Financing Receivable, Revolving	46,079
Revolving Loans Converted to Term	0
Loans, Total	3,328,012	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	100,998
Term Loans Amortized Cost Basis by Origination Year, 2019	501,212
Term Loans Amortized Cost Basis by Origination Year, 2018	490,930
Term Loans Amortized Cost Basis by Origination Year, 2017	472,440
Term Loans Amortized Cost Basis by Origination Year, 2016	480,363
Term Loans Amortized Cost Basis by Origination Year, Prior	1,159,966
Financing Receivable, Revolving	44,949
Revolving Loans Converted to Term	0
Loans, Total	3,250,858
Commercial Real Estate - Non-Owner Occupied | Watch & Special Mention
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	1,061
Term Loans Amortized Cost Basis by Origination Year, 2018	8,838
Term Loans Amortized Cost Basis by Origination Year, 2017	13,449
Term Loans Amortized Cost Basis by Origination Year, 2016	16,707
Term Loans Amortized Cost Basis by Origination Year, Prior	29,450
Financing Receivable, Revolving	838
Revolving Loans Converted to Term	0
Loans, Total	70,343
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	164
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	6,330
Financing Receivable, Revolving	200
Revolving Loans Converted to Term	0
Loans, Total	6,719
Commercial Real Estate - Non-Owner Occupied | Doubtful
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	92
Revolving Loans Converted to Term	0
Loans, Total	92
Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	60,276
Term Loans Amortized Cost Basis by Origination Year, 2019	78,954
Term Loans Amortized Cost Basis by Origination Year, 2018	63,329
Term Loans Amortized Cost Basis by Origination Year, 2017	137,392
Term Loans Amortized Cost Basis by Origination Year, 2016	65,965
Term Loans Amortized Cost Basis by Origination Year, Prior	265,849
Financing Receivable, Revolving	7,625
Revolving Loans Converted to Term	0
Loans, Total	679,390	633,743
Multifamily Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	60,276
Term Loans Amortized Cost Basis by Origination Year, 2019	78,954
Term Loans Amortized Cost Basis by Origination Year, 2018	63,329
Term Loans Amortized Cost Basis by Origination Year, 2017	129,106
Term Loans Amortized Cost Basis by Origination Year, 2016	64,831
Term Loans Amortized Cost Basis by Origination Year, Prior	254,868
Financing Receivable, Revolving	7,286
Revolving Loans Converted to Term	0
Loans, Total	658,650
Multifamily Real Estate | Watch & Special Mention
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	8,286
Term Loans Amortized Cost Basis by Origination Year, 2016	1,134
Term Loans Amortized Cost Basis by Origination Year, Prior	10,551
Financing Receivable, Revolving	339
Revolving Loans Converted to Term	0
Loans, Total	20,310
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	430
Financing Receivable, Revolving	0
Revolving Loans Converted to Term	0
Loans, Total	430
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	127,864
Term Loans Amortized Cost Basis by Origination Year, 2019	450,289
Term Loans Amortized Cost Basis by Origination Year, 2018	289,401
Term Loans Amortized Cost Basis by Origination Year, 2017	92,239
Term Loans Amortized Cost Basis by Origination Year, 2016	95,019
Term Loans Amortized Cost Basis by Origination Year, Prior	184,143
Financing Receivable, Revolving	938,977
Revolving Loans Converted to Term	402
Loans, Total	2,177,932	2,114,033
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	127,407
Term Loans Amortized Cost Basis by Origination Year, 2019	445,967
Term Loans Amortized Cost Basis by Origination Year, 2018	280,399
Term Loans Amortized Cost Basis by Origination Year, 2017	90,466
Term Loans Amortized Cost Basis by Origination Year, 2016	90,219
Term Loans Amortized Cost Basis by Origination Year, Prior	176,554
Financing Receivable, Revolving	894,146
Revolving Loans Converted to Term	353
Loans, Total	2,105,158
Commercial and Industrial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	457
Term Loans Amortized Cost Basis by Origination Year, 2019	3,817
Term Loans Amortized Cost Basis by Origination Year, 2018	7,987
Term Loans Amortized Cost Basis by Origination Year, 2017	1,520
Term Loans Amortized Cost Basis by Origination Year, 2016	3,900
Term Loans Amortized Cost Basis by Origination Year, Prior	4,367
Financing Receivable, Revolving	40,039
Revolving Loans Converted to Term	49
Loans, Total	62,087
Commercial and Industrial | 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	505
Term Loans Amortized Cost Basis by Origination Year, 2018	1,015
Term Loans Amortized Cost Basis by Origination Year, 2017	253
Term Loans Amortized Cost Basis by Origination Year, 2016	900
Term Loans Amortized Cost Basis by Origination Year, Prior	3,222
Financing Receivable, Revolving	4,792
Revolving Loans Converted to Term	0
Loans, Total	10,687
Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	30,869
Term Loans Amortized Cost Basis by Origination Year, 2019	115,229
Term Loans Amortized Cost Basis by Origination Year, 2018	88,620
Term Loans Amortized Cost Basis by Origination Year, 2017	108,365
Term Loans Amortized Cost Basis by Origination Year, 2016	90,417
Term Loans Amortized Cost Basis by Origination Year, Prior	285,772
Financing Receivable, Revolving	2,528
Revolving Loans Converted to Term	3,648
Loans, Total	721,800	724,337
Residential 1-4 Family - Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	29,989
Term Loans Amortized Cost Basis by Origination Year, 2019	112,509
Term Loans Amortized Cost Basis by Origination Year, 2018	79,932
Term Loans Amortized Cost Basis by Origination Year, 2017	104,116
Term Loans Amortized Cost Basis by Origination Year, 2016	86,412
Term Loans Amortized Cost Basis by Origination Year, Prior	264,081
Financing Receivable, Revolving	1,911
Revolving Loans Converted to Term	810
Loans, Total	678,950
Residential 1-4 Family - Commercial | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	880
Term Loans Amortized Cost Basis by Origination Year, 2019	2,720
Term Loans Amortized Cost Basis by Origination Year, 2018	8,378
Term Loans Amortized Cost Basis by Origination Year, 2017	3,617
Term Loans Amortized Cost Basis by Origination Year, 2016	2,159
Term Loans Amortized Cost Basis by Origination Year, Prior	13,689
Financing Receivable, Revolving	0
Revolving Loans Converted to Term	2,762
Loans, Total	31,443
Residential 1-4 Family - Commercial | 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	310
Term Loans Amortized Cost Basis by Origination Year, 2017	632
Term Loans Amortized Cost Basis by Origination Year, 2016	1,846
Term Loans Amortized Cost Basis by Origination Year, Prior	8,002
Financing Receivable, Revolving	617
Revolving Loans Converted to Term	76
Loans, Total	11,407
Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	21,273
Term Loans Amortized Cost Basis by Origination Year, 2019	97,262
Term Loans Amortized Cost Basis by Origination Year, 2018	107,885
Term Loans Amortized Cost Basis by Origination Year, 2017	103,634
Term Loans Amortized Cost Basis by Origination Year, 2016	130,558
Term Loans Amortized Cost Basis by Origination Year, Prior	393,925
Financing Receivable, Revolving	13
Loans, Total	854,550	890,503
Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	6,463
Term Loans Amortized Cost Basis by Origination Year, 2019	7,781
Term Loans Amortized Cost Basis by Origination Year, 2018	2,641
Term Loans Amortized Cost Basis by Origination Year, 2017	21
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	975
Financing Receivable, Revolving	634,254
Loans, Total	652,135	659,504
Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	35,381
Term Loans Amortized Cost Basis by Origination Year, 2019	149,869
Term Loans Amortized Cost Basis by Origination Year, 2018	78,383
Term Loans Amortized Cost Basis by Origination Year, 2017	49,358
Term Loans Amortized Cost Basis by Origination Year, 2016	29,312
Term Loans Amortized Cost Basis by Origination Year, Prior	15,736
Financing Receivable, Revolving	0
Loans, Total	358,039	350,419
Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	25,016
Term Loans Amortized Cost Basis by Origination Year, 2019	106,836
Term Loans Amortized Cost Basis by Origination Year, 2018	112,584
Term Loans Amortized Cost Basis by Origination Year, 2017	35,233
Term Loans Amortized Cost Basis by Origination Year, 2016	15,050
Term Loans Amortized Cost Basis by Origination Year, Prior	21,011
Financing Receivable, Revolving	36,842
Loans, Total	352,572	372,853
Other Commercial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	1,468
Term Loans Amortized Cost Basis by Origination Year, 2019	116,582
Term Loans Amortized Cost Basis by Origination Year, 2018	10,540
Term Loans Amortized Cost Basis by Origination Year, 2017	44,917
Term Loans Amortized Cost Basis by Origination Year, 2016	17,802
Term Loans Amortized Cost Basis by Origination Year, Prior	63,843
Financing Receivable, Revolving	19,103
Revolving Loans Converted to Term	0
Loans, Total	274,255	287,279
Other Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	1,468
Term Loans Amortized Cost Basis by Origination Year, 2019	116,582
Term Loans Amortized Cost Basis by Origination Year, 2018	9,904
Term Loans Amortized Cost Basis by Origination Year, 2017	43,520
Term Loans Amortized Cost Basis by Origination Year, 2016	17,802
Term Loans Amortized Cost Basis by Origination Year, Prior	59,403
Financing Receivable, Revolving	19,049
Revolving Loans Converted to Term	0
Loans, Total	267,728
Other Commercial | Watch & Special Mention
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	636
Term Loans Amortized Cost Basis by Origination Year, 2017	1,337
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	4,344
Financing Receivable, Revolving	54
Revolving Loans Converted to Term	0
Loans, Total	6,371
Other Commercial | 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	60
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	96
Financing Receivable, Revolving	0
Revolving Loans Converted to Term	0
Loans, Total	156
Commercial Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	471,970
Term Loans Amortized Cost Basis by Origination Year, 2019	2,136,452
Term Loans Amortized Cost Basis by Origination Year, 2018	1,718,616
Term Loans Amortized Cost Basis by Origination Year, 2017	1,286,647
Term Loans Amortized Cost Basis by Origination Year, 2016	1,004,392
Term Loans Amortized Cost Basis by Origination Year, Prior	2,845,318
Financing Receivable, Revolving	1,088,150
Revolving Loans Converted to Term	4,050
Loans, Total	10,551,545
Commercial Portfolio | Pass
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	469,433
Term Loans Amortized Cost Basis by Origination Year, 2019	2,114,016
Term Loans Amortized Cost Basis by Origination Year, 2018	1,671,044
Term Loans Amortized Cost Basis by Origination Year, 2017	1,238,876
Term Loans Amortized Cost Basis by Origination Year, 2016	940,760
Term Loans Amortized Cost Basis by Origination Year, Prior	2,678,639
Financing Receivable, Revolving	1,035,406
Revolving Loans Converted to Term	1,163
Loans, Total	10,148,174
Commercial Portfolio | Watch & Special Mention
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	2,537
Term Loans Amortized Cost Basis by Origination Year, 2019	21,931
Term Loans Amortized Cost Basis by Origination Year, 2018	44,236
Term Loans Amortized Cost Basis by Origination Year, 2017	44,757
Term Loans Amortized Cost Basis by Origination Year, 2016	55,726
Term Loans Amortized Cost Basis by Origination Year, Prior	125,316
Financing Receivable, Revolving	46,669
Revolving Loans Converted to Term	2,811
Loans, Total	341,172
Commercial Portfolio | 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	505
Term Loans Amortized Cost Basis by Origination Year, 2018	3,336
Term Loans Amortized Cost Basis by Origination Year, 2017	3,014
Term Loans Amortized Cost Basis by Origination Year, 2016	7,906
Term Loans Amortized Cost Basis by Origination Year, Prior	41,363
Financing Receivable, Revolving	5,983
Revolving Loans Converted to Term	76
Loans, Total	62,107
Commercial Portfolio | Doubtful
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	92
Revolving Loans Converted to Term	0
Loans, Total	92
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	$ 84,700	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	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 12,768,841	$ 12,610,936
Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	70,752
Term Loans Amortized Cost Basis by Origination Year, 2019	476,242
Term Loans Amortized Cost Basis by Origination Year, 2018	436,508
Term Loans Amortized Cost Basis by Origination Year, 2017	134,304
Term Loans Amortized Cost Basis by Origination Year, 2016	62,914
Term Loans Amortized Cost Basis by Origination Year, Prior	105,111
Financing Receivable, Revolving	32,421
Revolving Loans Converted to Term	0
Loans, Total	1,318,252	1,250,924
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	79,743
Term Loans Amortized Cost Basis by Origination Year, 2019	396,883
Term Loans Amortized Cost Basis by Origination Year, 2018	330,286
Term Loans Amortized Cost Basis by Origination Year, 2017	283,541
Term Loans Amortized Cost Basis by Origination Year, 2016	175,180
Term Loans Amortized Cost Basis by Origination Year, Prior	744,854
Financing Receivable, Revolving	41,417
Revolving Loans Converted to Term	0
Loans, Total	2,051,904	2,041,243
Commercial Real Estate - Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	100,998
Term Loans Amortized Cost Basis by Origination Year, 2019	502,273
Term Loans Amortized Cost Basis by Origination Year, 2018	499,932
Term Loans Amortized Cost Basis by Origination Year, 2017	485,889
Term Loans Amortized Cost Basis by Origination Year, 2016	497,095
Term Loans Amortized Cost Basis by Origination Year, Prior	1,195,746
Financing Receivable, Revolving	46,079
Revolving Loans Converted to Term	0
Loans, Total	3,328,012	3,286,098
Multifamily Real Estate
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	60,276
Term Loans Amortized Cost Basis by Origination Year, 2019	78,954
Term Loans Amortized Cost Basis by Origination Year, 2018	63,329
Term Loans Amortized Cost Basis by Origination Year, 2017	137,392
Term Loans Amortized Cost Basis by Origination Year, 2016	65,965
Term Loans Amortized Cost Basis by Origination Year, Prior	265,849
Financing Receivable, Revolving	7,625
Revolving Loans Converted to Term	0
Loans, Total	679,390	633,743
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	127,864
Term Loans Amortized Cost Basis by Origination Year, 2019	450,289
Term Loans Amortized Cost Basis by Origination Year, 2018	289,401
Term Loans Amortized Cost Basis by Origination Year, 2017	92,239
Term Loans Amortized Cost Basis by Origination Year, 2016	95,019
Term Loans Amortized Cost Basis by Origination Year, Prior	184,143
Financing Receivable, Revolving	938,977
Revolving Loans Converted to Term	402
Loans, Total	2,177,932	2,114,033
Residential 1-4 Family - Commercial
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	30,869
Term Loans Amortized Cost Basis by Origination Year, 2019	115,229
Term Loans Amortized Cost Basis by Origination Year, 2018	88,620
Term Loans Amortized Cost Basis by Origination Year, 2017	108,365
Term Loans Amortized Cost Basis by Origination Year, 2016	90,417
Term Loans Amortized Cost Basis by Origination Year, Prior	285,772
Financing Receivable, Revolving	2,528
Revolving Loans Converted to Term	3,648
Loans, Total	721,800	724,337
Residential 1-4 Family - Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	21,273
Term Loans Amortized Cost Basis by Origination Year, 2019	97,262
Term Loans Amortized Cost Basis by Origination Year, 2018	107,885
Term Loans Amortized Cost Basis by Origination Year, 2017	103,634
Term Loans Amortized Cost Basis by Origination Year, 2016	130,558
Term Loans Amortized Cost Basis by Origination Year, Prior	393,925
Financing Receivable, Revolving	13
Loans, Total	854,550	890,503
Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	6,463
Term Loans Amortized Cost Basis by Origination Year, 2019	7,781
Term Loans Amortized Cost Basis by Origination Year, 2018	2,641
Term Loans Amortized Cost Basis by Origination Year, 2017	21
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	975
Financing Receivable, Revolving	634,254
Loans, Total	652,135	659,504
Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	25,016
Term Loans Amortized Cost Basis by Origination Year, 2019	106,836
Term Loans Amortized Cost Basis by Origination Year, 2018	112,584
Term Loans Amortized Cost Basis by Origination Year, 2017	35,233
Term Loans Amortized Cost Basis by Origination Year, 2016	15,050
Term Loans Amortized Cost Basis by Origination Year, Prior	21,011
Financing Receivable, Revolving	36,842
Loans, Total	352,572	372,853
Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	35,381
Term Loans Amortized Cost Basis by Origination Year, 2019	149,869
Term Loans Amortized Cost Basis by Origination Year, 2018	78,383
Term Loans Amortized Cost Basis by Origination Year, 2017	49,358
Term Loans Amortized Cost Basis by Origination Year, 2016	29,312
Term Loans Amortized Cost Basis by Origination Year, Prior	15,736
Financing Receivable, Revolving	0
Loans, Total	358,039	350,419
Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	88,133
Term Loans Amortized Cost Basis by Origination Year, 2019	361,748
Term Loans Amortized Cost Basis by Origination Year, 2018	301,493
Term Loans Amortized Cost Basis by Origination Year, 2017	188,246
Term Loans Amortized Cost Basis by Origination Year, 2016	174,920
Term Loans Amortized Cost Basis by Origination Year, Prior	431,647
Financing Receivable, Revolving	671,109
Loans, Total	2,217,296
Purchased Impaired
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	84,700	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	21,273
Term Loans Amortized Cost Basis by Origination Year, 2019	95,266
Term Loans Amortized Cost Basis by Origination Year, 2018	105,226
Term Loans Amortized Cost Basis by Origination Year, 2017	99,655
Term Loans Amortized Cost Basis by Origination Year, 2016	129,032
Term Loans Amortized Cost Basis by Origination Year, Prior	370,353
Financing Receivable, Revolving	13
Loans, Total	820,818
Current | Residential 1-4 Family - Revolving
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	6,463
Term Loans Amortized Cost Basis by Origination Year, 2019	7,732
Term Loans Amortized Cost Basis by Origination Year, 2018	2,641
Term Loans Amortized Cost Basis by Origination Year, 2017	21
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	661
Financing Receivable, Revolving	623,471
Loans, Total	640,989
Current | Consumer
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	25,016
Term Loans Amortized Cost Basis by Origination Year, 2019	106,175
Term Loans Amortized Cost Basis by Origination Year, 2018	110,825
Term Loans Amortized Cost Basis by Origination Year, 2017	34,857
Term Loans Amortized Cost Basis by Origination Year, 2016	14,995
Term Loans Amortized Cost Basis by Origination Year, Prior	20,293
Financing Receivable, Revolving	36,792
Loans, Total	348,953
Current | Auto
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	35,381
Term Loans Amortized Cost Basis by Origination Year, 2019	149,149
Term Loans Amortized Cost Basis by Origination Year, 2018	77,698
Term Loans Amortized Cost Basis by Origination Year, 2017	48,701
Term Loans Amortized Cost Basis by Origination Year, 2016	28,777
Term Loans Amortized Cost Basis by Origination Year, Prior	15,378
Financing Receivable, Revolving	0
Loans, Total	355,084
Current | Consumer Portfolio
Financing Receivable, Recorded Investment [Line Items]
Term Loans Amortized Cost Basis by Origination Year, 2020	88,133
Term Loans Amortized Cost Basis by Origination Year, 2019	358,322
Term Loans Amortized Cost Basis by Origination Year, 2018	296,390
Term Loans Amortized Cost Basis by Origination Year, 2017	183,234
Term Loans Amortized Cost Basis by Origination Year, 2016	172,804
Term Loans Amortized Cost Basis by Origination Year, Prior	406,685
Financing Receivable, Revolving	660,276
Loans, Total	2,165,844
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	1,268
Term Loans Amortized Cost Basis by Origination Year, 2018	1,537
Term Loans Amortized Cost Basis by Origination Year, 2017	2,566
Term Loans Amortized Cost Basis by Origination Year, 2016	453
Term Loans Amortized Cost Basis by Origination Year, Prior	9,843
Financing Receivable, Revolving	0
Loans, Total	15,667
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	49
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	4,259
Loans, Total	4,308
30-59 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	329
Term Loans Amortized Cost Basis by Origination Year, 2018	692
Term Loans Amortized Cost Basis by Origination Year, 2017	198
Term Loans Amortized Cost Basis by Origination Year, 2016	11
Term Loans Amortized Cost Basis by Origination Year, Prior	342
Financing Receivable, Revolving	40
Loans, Total	1,612
30-59 Days Past Due | Auto
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	463
Term Loans Amortized Cost Basis by Origination Year, 2018	528
Term Loans Amortized Cost Basis by Origination Year, 2017	447
Term Loans Amortized Cost Basis by Origination Year, 2016	347
Term Loans Amortized Cost Basis by Origination Year, Prior	182
Financing Receivable, Revolving	0
Loans, Total	1,967
30-59 Days Past Due | Consumer Portfolio
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	2,109
Term Loans Amortized Cost Basis by Origination Year, 2018	2,757
Term Loans Amortized Cost Basis by Origination Year, 2017	3,211
Term Loans Amortized Cost Basis by Origination Year, 2016	811
Term Loans Amortized Cost Basis by Origination Year, Prior	10,367
Financing Receivable, Revolving	4,299
Loans, Total	23,554
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	109
Term Loans Amortized Cost Basis by Origination Year, 2017	77
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	384
Financing Receivable, Revolving	0
Loans, Total	570
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	1,286
Loans, Total	1,286
60-89 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	193
Term Loans Amortized Cost Basis by Origination Year, 2018	699
Term Loans Amortized Cost Basis by Origination Year, 2017	84
Term Loans Amortized Cost Basis by Origination Year, 2016	28
Term Loans Amortized Cost Basis by Origination Year, Prior	288
Financing Receivable, Revolving	2
Loans, Total	1,294
60-89 Days Past Due | Auto
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	63
Term Loans Amortized Cost Basis by Origination Year, 2018	52
Term Loans Amortized Cost Basis by Origination Year, 2017	92
Term Loans Amortized Cost Basis by Origination Year, 2016	40
Term Loans Amortized Cost Basis by Origination Year, Prior	64
Financing Receivable, Revolving	0
Loans, Total	311
60-89 Days Past Due | Consumer Portfolio
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	256
Term Loans Amortized Cost Basis by Origination Year, 2018	860
Term Loans Amortized Cost Basis by Origination Year, 2017	253
Term Loans Amortized Cost Basis by Origination Year, 2016	68
Term Loans Amortized Cost Basis by Origination Year, Prior	736
Financing Receivable, Revolving	1,288
Loans, Total	3,461
90+ 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	728
Term Loans Amortized Cost Basis by Origination Year, 2018	125
Term Loans Amortized Cost Basis by Origination Year, 2017	445
Term Loans Amortized Cost Basis by Origination Year, 2016	276
Term Loans Amortized Cost Basis by Origination Year, Prior	2,833
Financing Receivable, Revolving	0
Loans, Total	4,407
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	2,005
Loans, Total	2,005
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	139
Term Loans Amortized Cost Basis by Origination Year, 2018	368
Term Loans Amortized Cost Basis by Origination Year, 2017	94
Term Loans Amortized Cost Basis by Origination Year, 2016	13
Term Loans Amortized Cost Basis by Origination Year, Prior	0
Financing Receivable, Revolving	8
Loans, Total	622
90+ Days Past Due | Auto
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	77
Term Loans Amortized Cost Basis by Origination Year, 2018	24
Term Loans Amortized Cost Basis by Origination Year, 2017	12
Term Loans Amortized Cost Basis by Origination Year, 2016	0
Term Loans Amortized Cost Basis by Origination Year, Prior	14
Financing Receivable, Revolving	0
Loans, Total	127
90+ Days Past Due | Consumer Portfolio
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	944
Term Loans Amortized Cost Basis by Origination Year, 2018	517
Term Loans Amortized Cost Basis by Origination Year, 2017	551
Term Loans Amortized Cost Basis by Origination Year, 2016	289
Term Loans Amortized Cost Basis by Origination Year, Prior	2,847
Financing Receivable, Revolving	2,013
Loans, Total	7,161
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	888
Term Loans Amortized Cost Basis by Origination Year, 2017	891
Term Loans Amortized Cost Basis by Origination Year, 2016	797
Term Loans Amortized Cost Basis by Origination Year, Prior	10,512
Financing Receivable, Revolving	0
Loans, Total	13,088
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	3,233
Loans, Total	3,547
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	3
Term Loans Amortized Cost Basis by Origination Year, Prior	88
Financing Receivable, Revolving	0
Loans, Total	91
Nonaccrual | Auto
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	117
Term Loans Amortized Cost Basis by Origination Year, 2018	81
Term Loans Amortized Cost Basis by Origination Year, 2017	106
Term Loans Amortized Cost Basis by Origination Year, 2016	148
Term Loans Amortized Cost Basis by Origination Year, Prior	98
Financing Receivable, Revolving	0
Loans, Total	550
Nonaccrual | Consumer Portfolio
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	117
Term Loans Amortized Cost Basis by Origination Year, 2018	969
Term Loans Amortized Cost Basis by Origination Year, 2017	997
Term Loans Amortized Cost Basis by Origination Year, 2016	948
Term Loans Amortized Cost Basis by Origination Year, Prior	11,012
Financing Receivable, Revolving	3,233
Loans, Total	$ 17,276

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	3 Months Ended
	Mar. 31, 2019USD ($)
Accretable Yield
Balance at beginning of period	$ 31,201
Additions	2,432
Accretion	(2,385)
Reclass of nonaccretable difference due to improvement in expected cash flows	465
Other, net	1,508
Balance at end of period	$ 33,221

INTANGIBLE ASSETS (Narrative) (

INTANGIBLE ASSETS (Narrative) (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Mar. 31, 2020	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Impairment charges for goodwill	$ 0	$ 0
Intangible assets, amortization expense		$ 4,401	$ 4,218
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization period (years)		4 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization period (years)		10 years
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
Core Deposits and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization expense		$ 4,400	$ 4,200

INTANGIBLE ASSETS (Estimated Re

INTANGIBLE ASSETS (Estimated Remaining Amortization Expense of Intangibles) (Details) $ in Thousands	Mar. 31, 2020USD ($)
Estimated Remaining Amortization of Intangibles
For the remaining nine months of 2020	$ 12,113
2021	13,874
2022	11,490
2023	9,687
2024	7,818
Thereafter	14,316
Total estimated amortization expense	$ 69,298

LEASES (Narrative) (Details)

LEASES (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)Transactionlease	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Lessee, Operating lease, number of leases | lease	160
Operating lease, liability	$ 64,171
Operating lease, expense	2,900	$ 3,200
Lessee, operating lease, lease not yet commenced, amount	$ 0
Sale leaseback transaction, number of transactions (transaction) | Transaction	0
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term (years)	14 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset	$ 53,600		$ 54,900
Operating lease, liability	$ 64,200		$ 66,100

LEASES (Maturity of Operating L

LEASES (Maturity of Operating Leases Under Topic 842) (Details) $ in Thousands	Mar. 31, 2020USD ($)
Leases [Abstract]
For the remaining nine months of 2020	$ 9,714
2021	11,523
2022	10,545
2023	9,561
2024	8,232
2025	6,040
Thereafter	15,088
Total future lease payments	70,703
Less: Interest	6,533
Present value of lease liabilities	$ 64,171

LEASES (Other Lease Information

LEASES (Other Lease Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	7 years 2 months 12 days		7 years 4 months 9 days
Operating lease, weighted average discount rate, percent	2.56%		2.69%
Operating Cash Flows from Operating Leases	$ 3,517	$ 3,468
Right-of-use assets obtained in exchange for lease obligations, operating lease	$ 1,216	$ 4,346

BORROWINGS (Short-Term Borrowin

BORROWINGS (Short-Term Borrowings) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 56,781	$ 66,053
Federal Funds Purchased	25,000
FHLB Advances	355,000	370,200
Total short-term borrowings	436,781	436,253
Average outstanding balance during the period	$ 364,931	$ 673,116
Average interest rate (during the period)	1.48%	2.30%
Average interest rate at end of period	1.30%	1.52%

BORROWINGS (Narrative) (Details

BORROWINGS (Narrative) (Details) - USD ($)	Feb. 01, 2019	Aug. 23, 2012	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2016	Dec. 31, 2019	Jan. 01, 2018
Subordinated Borrowing [Line Items]
Remaining available balance for the federal funds lines			$ 787,000,000			$ 682,000,000
Remaining borrowing capacity with correspondent banks			25,000,000			25,000,000
Maximum collateral dependent line of credit with the FHLB			5,300,000,000			5,200,000,000
Subordinated debt			158,500,000		$ 150,000,000
Prepayment penalty		$ 19,600,000
Amortization expense included as a component of interest expense				$ 493,000
Trust Preferred Capital Notes
Subordinated Borrowing [Line Items]
Trust preferred capital notes principal balance			150,500,000
Remaining fair value discount on acquired notes			14,700,000
Subordinated Debt
Subordinated Borrowing [Line Items]
Remaining fair value discount on acquired notes			$ 1,300,000			$ 1,400,000
Stated percentage on debt instrument					5.00%
Subordinated debt maturity date			Dec. 15, 2026		Dec. 15, 2021
LIBOR | Subordinated Debt
Subordinated Borrowing [Line Items]
Three-month LIBOR rate plus			3.175%
StellarOne Bank and Xenith [Member] | Trust Preferred Capital Notes
Subordinated Borrowing [Line Items]
Trust preferred capital notes principal balance			$ 58,500,000
Trust preferred securities acquired			87,000,000
Xenith
Subordinated Borrowing [Line Items]
Subordinated debt							$ 8,500,000
Xenith | Subordinated Debt
Subordinated Borrowing [Line Items]
Remaining fair value discount on acquired notes			$ 25,000				$ 259,000
Stated percentage on debt instrument							6.75%
Access National Bank
Subordinated Borrowing [Line Items]
Trust preferred capital notes principal balance	$ 5,000,000

BORROWINGS (Trust Preferred Cap

BORROWINGS (Trust Preferred Capital Notes Qualify for Tier 1 Capital) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Investment	$ 491,646	$ 377,587
Trust Preferred Capital Notes
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	150,500
Investment	4,659
Statutory Trust I
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	22,500
Investment	$ 696
Rate	4.20%
Subordinated debt maturity date	Jun. 17, 2034
Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	2.75%
Statutory Trust II
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 36,000
Investment	$ 1,114
Rate	2.85%
Subordinated debt maturity date	Jun. 15, 2036
Statutory Trust II | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	1.40%
VFG Limited Liability Trust I Indenture
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 20,000
Investment	$ 619
Rate	4.18%
Subordinated debt maturity date	Mar. 18, 2034
VFG Limited Liability Trust I Indenture | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	2.73%
FNB Statutory Trust II Indenture
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 12,000
Investment	$ 372
Rate	4.55%
Subordinated debt maturity date	Jun. 26, 2033
FNB Statutory Trust II Indenture | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	3.10%
Gateway Capital Statutory Trust I
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 8,000
Investment	$ 248
Rate	4.55%
Subordinated debt maturity date	Sep. 17, 2033
Gateway Capital Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	3.10%
Gateway Capital Statutory Trust II
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 7,000
Investment	$ 217
Rate	4.10%
Subordinated debt maturity date	Jun. 17, 2034
Gateway Capital Statutory Trust II | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	2.65%
Gateway Capital Statutory Trust III
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 15,000
Investment	$ 464
Rate	2.95%
Subordinated debt maturity date	May 30, 2036
Gateway Capital Statutory Trust III | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	1.50%
Gateway Capital Statutory Trust IV
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 25,000
Investment	$ 774
Rate	3.00%
Subordinated debt maturity date	Jul. 30, 2037
Gateway Capital Statutory Trust IV | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	1.55%
MFC Capital Trust II
Debt Instrument [Line Items]
Trust preferred capital notes principal balance	$ 5,000
Investment	$ 155
Rate	4.30%
Subordinated debt maturity date	Jan. 23, 2034
MFC Capital Trust II | LIBOR
Debt Instrument [Line Items]
Spread on LIBOR	2.85%

BORROWINGS (Advances from the F

BORROWINGS (Advances from the FHLB) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Advances from the FHLB
Advance Amount	$ 780,000	$ 780,000
Adjustable Rate Credit One
Advances from the FHLB
Interest Rate	0.70%	1.16%
Maturity Date	Aug. 17, 2029	Aug. 17, 2029
Advance Amount	$ 50,000	$ 50,000
Adjustable Rate Credit Two
Advances from the FHLB
Interest Rate	0.95%	1.41%
Maturity Date	May 15, 2024	May 15, 2024
Advance Amount	$ 200,000	$ 200,000
Adjustable Rate Credit Three
Advances from the FHLB
Interest Rate	0.70%	1.16%
Maturity Date	May 22, 2029	May 22, 2029
Advance Amount	$ 150,000	$ 150,000
Adjustable Rate Credit Four
Advances from the FHLB
Interest Rate	0.70%	1.16%
Maturity Date	May 30, 2029	May 30, 2029
Advance Amount	$ 50,000	$ 50,000
Adjustable Rate Credit Five
Advances from the FHLB
Interest Rate	0.70%	1.16%
Maturity Date	Jun. 21, 2029	Jun. 21, 2029
Advance Amount	$ 100,000	$ 100,000
Fixed Rate Convertible
Advances from the FHLB
Interest Rate	1.78%	1.78%
Maturity Date	Oct. 26, 2028	Oct. 26, 2028
Advance Amount	$ 200,000	$ 200,000
Fixed Rate Hybrid One
Advances from the FHLB
Interest Rate	1.58%	1.58%
Maturity Date	May 18, 2020	May 18, 2020
Advance Amount	$ 20,000	$ 20,000
Fixed Rate Credit
Advances from the FHLB
Interest Rate	1.54%	1.54%
Maturity Date	Oct. 2, 2020	Oct. 2, 2020
Advance Amount	$ 10,000	$ 10,000
LIBOR | Adjustable Rate Credit One
Advances from the FHLB
Spread on LIBOR	(0.75%)	(0.75%)
LIBOR | Adjustable Rate Credit Two
Advances from the FHLB
Spread on LIBOR	(0.50%)	(0.50%)
LIBOR | Adjustable Rate Credit Three
Advances from the FHLB
Spread on LIBOR	(0.75%)	(0.75%)
LIBOR | Adjustable Rate Credit Four
Advances from the FHLB
Spread on LIBOR	(0.75%)	(0.75%)
LIBOR | Adjustable Rate Credit Five
Advances from the FHLB
Spread on LIBOR	(0.75%)	(0.75%)

BORROWINGS (Contractual Maturit

BORROWINGS (Contractual Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Premium (Discount)
For the remaining nine months of 2020	$ (646)
2021	(1,008)
2022	(1,030)
2023	(1,053)
2024	(1,078)
Thereafter	(11,161)
Total Long-term borrowings	(15,976)
Total Long-term Borrowings
For the remaining nine months of 2020	29,354
2021	(1,008)
2022	(1,030)
2023	(1,053)
2024	198,922
Thereafter	852,498
Long-term Debt	1,077,683	$ 1,077,495
Trust Preferred Capital Notes
Total Long-term Borrowings, Gross
For the remaining nine 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 nine months of 2020	0
2021	0
2022	0
2023	0
2024	0
Thereafter	158,500
Total Long-term borrowings	158,500
FHLB Advances
Total Long-term Borrowings, Gross
For the remaining nine months of 2020	30,000
2021	0
2022	0
2023	0
2024	200,000
Thereafter	550,000
Total Long-term borrowings	$ 780,000

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Deposits with other financial institutions	$ 261.7
Uninsured deposits with other financial institutions	12.1
Reserve for Off-balance Sheet Activities
Off-balance sheet credit risks, amount, liability	10.7	$ 2.6
Cash Flow Hedging
Deposits with other financial institutions serves as collateral for cash flow hedge	$ 246.4

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES (Balances of Commitments and Contingencies) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Commitments with off-balance sheet risk:
Total commitments with off-balance sheet risk	$ 4,770,584	$ 4,900,930
Commitments to Extend Credit
Commitments with off-balance sheet risk:
Total commitments with off-balance sheet risk	4,605,213	4,691,272
Standby Letters of Credit
Commitments with off-balance sheet risk:
Total commitments with off-balance sheet risk	$ 165,371	$ 209,658

COMMITMENTS AND CONTINGENCIES_4

COMMITMENTS AND CONTINGENCIES (Schedule of Securities Pledged as Collateral) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	$ 246,430	$ 116,839
Loans	4,427,325	4,139,672
Total pledged assets	5,732,208	5,300,858
Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	734,463	733,995
Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	323,990	310,352
Public deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	0	0
Total pledged assets	770,154	759,362
Public deposits | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	455,201	467,266
Public deposits | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	314,953	292,096
Repurchase agreements
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash	0	0
Loans	0	0
Total pledged assets	98,445	86,901
Repurchase agreements | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	98,445	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	4,107,411	3,846,934
Total pledged assets	4,168,540	3,910,746
FHLB Advances | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	61,129	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	319,914	292,738
Total pledged assets	319,914	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	246,430	116,839
Loans	0	0
Total pledged assets	247,521	118,099
Derivatives | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	1,091	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	127,634	133,012
Other purposes | Available-for-sale Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	118,597	122,358
Other purposes | Held-to-maturity Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged	$ 9,037	$ 10,654

DERIVATIVES (Narrative) (Detail

DERIVATIVES (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)derivative	Dec. 31, 2019USD ($)
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	$ 50,000
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Number of interest rate derivatives terminated | derivative	1
Unrealized gain within accumulated other comprehensive income, to be reclassified into earnings	$ 1,800
Fair Value Hedging
Derivatives, Fair Value [Line Items]
Aggregate notional amount of the hedged items	82,000	$ 83,100
Fair value of aggregate notional amount of the hedged items, unrealized loss	6,800	2,000
Loans
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	81,961	83,078
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	6,734	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)	194,899	206,799
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	7,990	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	Mar. 31, 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	$ 1,800,795	$ 1,575,149
Asset		753
Liabilities	174,704	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	1,800,795	1,575,149
Asset	174,704	53,592
Liabilities		753
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	131,961	133,078
Asset	1	182
Liabilities	$ 14,769	$ 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	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	$ 50,000
Portfolio, last-of-layer, amortized cost	195,000	$ 207,000
Fair Value Hedging
Derivative [Line Items]
Fair value of aggregate notional amount of the hedged items, unrealized loss	6,800	2,000
Available-for-sale Securities
Derivative [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	194,899	206,799
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	7,990	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)	81,961	83,078
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	$ 6,734	$ 1,972

STOCKHOLDERS' EQUITY (Narrative

STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications of unrealized gains (losses) on AFS	$ 1,936	$ 151
Serial Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares authorized	500,000
Preferred stock, par value (usd per share)	$ 10
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0

STOCKHOLDERS' EQUITY (Change in

STOCKHOLDERS' EQUITY (Change in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,513,102	$ 1,924,581
Other comprehensive income (loss)	12,754	18,670
Ending balance	2,425,450	2,459,465
Unrealized Gains (Losses) on AFS Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	37,877	(5,949)
Other comprehensive income (loss) before reclassification	14,687	20,081
Amounts reclassified from accumulated other comprehensive income	(1,529)	(85)
Other comprehensive income (loss)	13,158	19,996
Ending balance	51,035	14,047
Unrealized Gains (Losses) for AFS Securities Transferred to HTM
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	75	95
Other comprehensive income (loss) before reclassification	0	0
Amounts reclassified from accumulated other comprehensive income	(5)	(5)
Other comprehensive income (loss)	(5)	(5)
Ending balance	70	90
Change in Fair Value of Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(782)	(3,393)
Other comprehensive income (loss) before reclassification	(699)	(1,460)
Amounts reclassified from accumulated other comprehensive income	1,481	120
Other comprehensive income (loss)	782	(1,340)
Ending balance		(4,733)
Unrealized Gains (Losses) on BOLI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,595)	(1,026)
Other comprehensive income (loss) before reclassification	(1,289)	0
Amounts reclassified from accumulated other comprehensive income	108	19
Other comprehensive income (loss)	(1,181)	19
Ending balance	(2,776)	(1,007)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	35,575	(10,273)
Other comprehensive income (loss) before reclassification	12,699	18,621
Amounts reclassified from accumulated other comprehensive income	55	49
Other comprehensive income (loss)	12,754	18,670
Ending balance	$ 48,329	$ 8,397

FAIR VALUE MEASUREMENTS (Narrat

FAIR VALUE MEASUREMENTS (Narrative) (Details) item in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 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 | $	$ 6.6	$ 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	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Securities available for sale, at fair value	$ 1,972,903	$ 1,945,445
Loans held for sale, at fair value	76,690	55,405
Fair value hedges	1	182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	14,769	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	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	1,972,903	1,945,445
Loans held for sale, at fair value	76,690	55,405
Fair value hedges	1	182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	14,769	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	0
LIABILITIES
Cash flow hedges		0
Fair value hedges	0	0
Recurring
ASSETS
Loans held for sale, at fair value	76,690	55,405
Fair value hedges	1	182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	14,769	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	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	76,690	55,405
Fair value hedges	1	182
LIABILITIES
Cash flow hedges		1,147
Fair value hedges	14,769	6,256
Recurring | Significant Unobservable Inputs Level 3
ASSETS
Loans held for sale, at fair value	0	0
Fair value hedges	0	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	17,962	21,320
U.S. government and agency securities | Recurring
ASSETS
Securities available for sale, at fair value	17,962	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	17,962	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	546,726	447,091
Obligations of states and political subdivisions | Recurring
ASSETS
Securities available for sale, at fair value	546,726	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	546,726	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	120,968	135,959
Corporate and other bonds | Recurring
ASSETS
Securities available for sale, at fair value	120,968	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	120,968	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
ASSETS
Securities available for sale, at fair value	1,284,157	1,337,996
Total mortgage-back securities | Recurring
ASSETS
Securities available for sale, at fair value	1,284,157	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	1,284,157	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	3,090	3,079
Other securities | Recurring
ASSETS
Securities available for sale, at fair value	3,090	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	3,090	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	174,704	54,345
LIABILITIES
Interest rate swap	174,704	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	174,704	54,345
LIABILITIES
Interest rate swap	174,704	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	174,704	54,345
LIABILITIES
Interest rate swap	174,704	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	174,704	54,345
LIABILITIES
Interest rate swap	174,704	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	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 504,959	$ 436,032
Securities available for sale, at fair value	1,972,903	1,945,445
HTM securities	604,780	603,503
Restricted stock	130,227	130,848
Loans held for sale, at fair value	76,690	55,405
Net loans	12,413,731	12,449,505
Derivatives:
Fair value hedges	1	182
Accrued interest receivable	46,678	52,721
Bank owned life insurance	324,980	322,917
LIABILITIES
Deposits	13,610,143	13,349,943
Borrowings	1,501,474	1,479,606
Accrued interest payable	7,532	6,108
Derivatives:
Cash flow hedges		1,147
Fair value hedges	14,769	6,256
Quoted Prices in Active Markets for Identical Assets Level 1
ASSETS
Cash and cash equivalents	504,959	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	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	1,972,903	1,945,445
HTM securities	588,984	585,820
Restricted stock	130,227	130,848
Loans held for sale, at fair value	76,690	55,405
Net loans	0	0
Derivatives:
Fair value hedges	1	182
Accrued interest receivable	46,678	52,721
Bank owned life insurance	324,980	322,917
LIABILITIES
Deposits	13,610,143	13,349,943
Borrowings	1,501,474	1,479,606
Accrued interest payable	7,532	6,108
Derivatives:
Cash flow hedges		1,147
Fair value hedges	14,769	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	15,796	17,683
Restricted stock	0	0
Loans held for sale, at fair value	0	0
Net loans	12,413,731	12,449,505
Derivatives:
Fair value hedges	0	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	174,704	54,345
Derivatives:
Interest rate swap	174,704	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	174,704	54,345
Derivatives:
Interest rate swap	174,704	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	504,959	436,032
Securities available for sale, at fair value	1,972,903	1,945,445
HTM securities	552,176	555,144
Restricted stock	130,227	130,848
Loans held for sale, at fair value	76,690	55,405
Net loans	12,627,798	12,568,642
Derivatives:
Fair value hedges	1	182
Accrued interest receivable	46,678	52,721
Bank owned life insurance	324,980	322,917
LIABILITIES
Deposits	13,553,035	13,304,981
Borrowings	1,514,464	1,513,748
Accrued interest payable	7,532	6,108
Derivatives:
Cash flow hedges		1,147
Fair value hedges	14,769	6,256
Carrying Value | Interest Rate Swap
Derivatives:
Interest rate swap	174,704	54,345
Derivatives:
Interest rate swap	$ 174,704	$ 54,345

REVENUE (Disaggregation of Reve

REVENUE (Disaggregation of Revenue) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue
Mortgage banking income	$ 2,022,000	$ 1,454,000
Gains (losses) on securities transactions	1,936,000	151,000
Bank owned life insurance income	2,049,000	2,055,000
Loan-related interest rate swap fees	3,948,000	1,460,000
Other operating income	2,141,000	897,000
Total noninterest income	28,907,000	24,938,000
Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Other operating income	2,141,000	813,000
Overdraft fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	5,765,000	5,782,000
Maintenance fees & other | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	1,813,000	1,376,000
Other service charges, commissions and fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	1,624,000	1,664,000
Interchange fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	1,625,000	5,045,000
Trust asset management fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	2,827,000	1,339,000
Registered advisor management fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	2,088,000	2,875,000
Brokerage management fees | Noninterest income in Scope of Topic 606
Disaggregation of Revenue
Revenue from contract with customer	$ 1,069,000	$ 840,000

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
	Mar. 31, 2020	Mar. 31, 2019
Net Income:
Income from continuing operations	$ 7,089	$ 35,716
Income (loss) from discontinued operations		(85)
Net Income (Loss) Available to Common Stockholders, Basic, Total	$ 7,089	$ 35,631
Basic weighted average number of common shares outstanding (in shares)	79,290,352	76,472,189
Dilutive effect of stock awards and warrants	27,000	61,000
Weighted average shares outstanding, diluted	79,317,382	76,533,066
Basic EPS:
Earnings per share from continuing operations, basic (dollar per share)	$ 0.09	$ 0.47
Earnings per share from discontinued operations, basic (dollar per share)	0	0
Earnings per share available to common shareholders, basic (dollar per share)	0.09	0.47
Diluted EPS:
Earnings per share from continuing operations, diluted (dollar per share)	0.09	0.47
Earnings per share from discontinued operations, diluted (dollar per share)	0	0
Earnings per share available to common shareholders, diluted (dollar per share)	$ 0.09	$ 0.47

SEGMENT REPORTING & DISCONTIN_3

SEGMENT REPORTING & DISCONTINUED OPERATIONS (Narrative) (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Assets of discontinued operations	$ 0	$ 668,000
Liabilities of discontinued operations	$ 0	$ 640,000

SEGMENT REPORTING & DISCONTIN_4

SEGMENT REPORTING & DISCONTINUED OPERATIONS (Information About Reportable Segments and Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Net interest income	$ 135,008	$ 127,547
Provision for credit losses	60,196	3,792
Net interest income after provision for credit losses	74,812	123,755
Noninterest income	28,907	24,938
Noninterest expenses	95,645	106,728
Income before income taxes	0	(115)
Income tax expense (benefit)	0	(30)
Net income (loss) on discontinued operations	$ 0	(85)
Mortgage | Discontinued Operations
Segment Reporting Information [Line Items]
Net interest income		0
Provision for credit losses		0
Net interest income after provision for credit losses		0
Noninterest income		1
Noninterest expenses		116
Income before income taxes		(115)
Income tax expense (benefit)		(30)
Net income (loss) on discontinued operations		$ (85)

SUBSEQUENT EVENTS (Narrative) (

SUBSEQUENT EVENTS (Narrative) (Details) - Subsequent Event $ in Billions	May 07, 2020USD ($)loan
COVID-19
Subsequent Event [Line Items]
Approved Loan Modification Under the Cares Act	$ 1.9
Paycheck Protection Program (PPP)
Subsequent Event [Line Items]
Number of loans approved by SBA under the CARES Act | loan	10,000
Total value loans approved by SBA under the CARES Act	$ 1.8