National Bank (NBHC) 10-Q 5 May 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 01, 2020
Document Document And Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2020
Entity File Number	001-35654
Entity Registrant Name	NATIONAL BANK HOLDINGS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-0563799
Entity Address, Address Line One	7800 East Orchard, Suite 300
Entity Address, City or Town	Greenwood Village
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80111
City Area Code	303
Local Phone Number	892-8715
Title of 12(b) Security	Class A Common Stock
Trading Symbol	NBHC
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,562,457
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001475841
Amendment Flag	false

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 133,426	$ 109,690
Interest bearing bank deposits	500	500
Cash and cash equivalents	133,926	110,190
Investment securities available-for-sale (at fair value)	629,396	638,249
Investment securities held-to-maturity (fair value of $197,597 and $183,741 at March 31, 2020 and December 31, 2019, respectively)	192,902	182,884
Non-marketable securities	29,948	29,751
Loans	4,505,735	4,415,406
Allowance for credit losses	(50,956)	(39,064)
Loans, net	4,454,779	4,376,342
Loans held for sale	127,439	117,444
Other real estate owned	7,051	7,300
Premises and equipment, net	112,393	112,151
Goodwill	115,027	115,027
Intangible assets, net	10,489	11,361
Other assets	214,980	194,813
Total assets	6,028,330	5,895,512
Liabilities:
Non-interest bearing demand deposits	1,150,437	1,184,945
Interest bearing demand deposits	846,824	738,496
Savings and money market	1,693,614	1,755,538
Time deposits	1,050,981	1,058,153
Total deposits	4,741,856	4,737,132
Securities sold under agreements to repurchase	23,703	56,935
Federal Home Loan Bank advances	341,506	207,675
Other liabilities	157,811	126,850
Total liabilities	5,264,876	5,128,592
Shareholders' equity:
Common stock, par value $0.01 per share: 400,000,000 shares authorized; 51,487,907 and 51,487,907 shares issued; 30,483,361 and 31,176,627 shares outstanding at March 31, 2020 and December 31, 2019, respectively	515	515
Additional paid-in capital	1,009,478	1,009,223
Retained earnings	168,984	164,082
Treasury stock of 20,883,923 and 20,189,082 shares at March 31, 2020 and December 31, 2019, respectively, at cost	(427,890)	(408,962)
Accumulated other comprehensive income, net of tax	12,367	2,062
Total shareholders' equity	763,454	766,920
Total liabilities and shareholders' equity	$ 6,028,330	$ 5,895,512

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 197,597	$ 183,741
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	400,000,000	400,000,000
Common Stock, shares issued	51,487,907	51,487,907
Common Stock, shares outstanding	30,483,361	31,176,627
Treasury stock, shares	20,883,923	20,189,082

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest and dividend income:
Interest and fees on loans	$ 53,527	$ 52,775
Interest and dividends on investment securities	4,631	6,012
Dividends on non-marketable securities	414	423
Interest on interest-bearing bank deposits	96	210
Total interest and dividend income	58,668	59,420
Interest expense:
Interest on deposits	7,326	6,615
Interest on borrowings	995	1,639
Total interest expense	8,321	8,254
Net interest income before provision for loan losses	50,347	51,166
Provision for loan losses	6,159	1,534
Net interest income after provision for loan losses	44,188	49,632
Non-interest income:
Non-interest income	23,532	17,051
Mortgage banking income	13,673	6,937
Bank-owned life insurance income	590	421
Other non-interest income	1,602	1,883
OREO-related income	28	61
Total non-interest income	23,532	17,051
Non-interest expense:
Salaries and benefits	33,180	27,890
Occupancy and equipment	6,898	6,882
Telecommunications and data processing	2,265	2,290
Marketing and business development	696	986
FDIC deposit insurance	(76)	498
Bank card expenses	1,026	810
Professional fees	609	814
Other non-interest expense	3,090	3,173
Problem asset workout	648	1,123
Loss (gain) on OREO sales, net	39	(368)
Core deposit intangible asset amortization	296	296
Total non-interest expense	48,671	44,394
Income before income taxes	19,049	22,289
Income tax expense	3,225	3,367
Net income	$ 15,824	$ 18,922
Earnings per share-basic (in dollars per share)	$ 0.51	$ 0.61
Earnings per share-diluted (in dollars per share)	$ 0.50	$ 0.60
Weighted average number of common shares outstanding:
Basic (Shares)	31,157,476	30,961,187
Diluted (Shares)	31,361,296	31,497,538
Service charges and other fees
Non-interest income:
Non-interest income	$ 4,126	$ 4,321
Bank card fees
Non-interest income:
Non-interest income	$ 3,513	$ 3,428

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 15,824	$ 18,922
Securities available-for-sale:
Net unrealized gains arising during the period, net of tax expense of $3,301 and $1,706 for the three months ended March 31, 2020 and 2019, respectively.	10,521	5,417
Less: amortization of net unrealized holding gains to income, net of tax benefit of $68 and $90 for the three months ended March 31, 2020 and 2019, respectively.	(216)	(282)
Other comprehensive income	10,305	5,135
Comprehensive income	$ 26,129	$ 24,057

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 on net unrealized gains arising during the period	$ 3,301	$ 1,706
Tax (expense) benefit of amortization of net unrealized holding gains to income	$ 68	$ 90

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Treasury stock [Member]	Accumulated other comprehensive (loss) income, net [Member]	Total
Balance in the beginning at Dec. 31, 2018	$ 515	$ 1,014,399	$ 106,990	$ (415,623)	$ (11,275)	$ 695,006
Increase (Decrease) in Stockholders' Equity
Net income			18,922			18,922
Stock-based compensation		376				376
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net		(1,801)		2,397		596
Cash dividends declared			(5,289)			(5,289)
Cumulative effect adjustment			256			256
Other comprehensive income (loss)					5,135	5,135
Balance in the ending at Mar. 31, 2019	515	1,012,974	120,879	(413,226)	(6,140)	715,002
Balance in the beginning at Dec. 31, 2019	515	1,009,223	164,082	(408,962)	2,062	766,920
Increase (Decrease) in Stockholders' Equity
Net income			15,824			15,824
Stock-based compensation		1,222				1,222
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net		(967)		548		(419)
Repurchase of 734,117 shares				(19,476)		(19,476)
Cash dividends declared			(6,299)			(6,299)
Cumulative effect adjustment			(4,623)			(4,623)
Other comprehensive income (loss)					10,305	10,305
Balance in the ending at Mar. 31, 2020	$ 515	$ 1,009,478	$ 168,984	$ (427,890)	$ 12,367	$ 763,454

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]
Gain on reissuance of treasury stock	$ 414	$ 2,291
Shares repurchased (shares)	734,117
Cash dividends declared per share	$ 0.20	$ 0.17

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 15,824	$ 18,922
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	6,159	1,534
Depreciation and amortization	3,597	2,527
Current income tax receivable	3,902	2,968
Deferred income taxes	2,503	1,929
Net excess tax expense (benefit) on stock-based compensation	28	(753)
Discount accretion, net of premium amortization on securities	501	442
Loan accretion	(4,142)	(4,193)
Gain on sale of mortgages, net	(13,483)	(6,276)
Origination of loans held for sale, net of repayments	(337,155)	(176,105)
Proceeds from sales of loans held for sale	341,019	171,330
Bank-owned life insurance income	(590)	(421)
Loss (gain) on the sale of other real estate owned, net	39	(368)
Impairment of mortgage servicing rights	509	54
Impairment on other real estate owned		596
Stock-based compensation	1,227	375
Operating lease payments	(1,396)	(1,406)
Change in other assets	(29,095)	662
Change in other liabilities	36,795	(15,437)
Net cash provided by (used in) operating activities	26,242	(3,620)
Cash flows from investing activities:
Purchase of FHLB stock	(197)	(4,248)
Proceeds from redemption of FHLB stock		7,229
Proceeds from maturities of investment securities held-to-maturity	15,351	13,217
Proceeds from maturities of investment securities available-for-sale	48,830	48,328
Purchase of investment securities held-to-maturity	(25,824)
Purchase of investment securities available-for-sale	(26,485)
Net increase in loans	(91,384)	(159,027)
Purchases of premises and equipment, net	(2,161)	(1,688)
Proceeds from sales of other real estate owned	228	1,262
Net cash used in investing activities	(81,642)	(94,927)
Cash flows from financing activities:
Net increase in deposits	4,724	178,826
Net increase in repurchase agreements and other short-term borrowings	(33,232)	(6,504)
Advances from FHLB	607,000	319,041
FHLB repayments	(473,169)	(392,280)
Issuance of stock under purchase and equity compensation plans	(457)	(1,646)
Proceeds from exercise of stock options	6	2,221
Payment of dividends	(6,260)	(5,409)
Repurchase of common stock	(19,476)
Net cash provided by financing activities	79,136	94,249
Increase (decrease) in cash, cash equivalents and restricted cash	23,736	(4,298)
Cash, cash equivalents and restricted cash at beginning of the year	120,190	119,556
Cash, cash equivalents and restricted cash at end of period	143,926	115,258
Supplemental disclosure of cash flow information during the period:
Cash paid for interest	8,086	6,539
Net tax payment (refund)	54	(86)
Supplemental schedule of non-cash activities:
Loans transferred to other real estate owned at fair value	18	288
Decrease in loans purchased but not settled	(4,450)	(7,974)
Loans transferred from loans held for sale to loans	$ 376	198
Lease right-of-use assets obtained		$ (30,474)

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - Peoples Inc $ in Millions	Mar. 31, 2020USD ($)
Restricted cash placed in escrow	$ 10
Restricted Cash, Asset, Statement of Financial Position [Extensible List]	Other Assets [Member]

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2020
Basis of Presentation
Basis of Presentation	Note 1 Basis of Presentation ​ National Bank Holdings Corporation ("NBHC" or the "Company") is a bank holding company that was incorporated in the State of Delaware in 2009. The Company is headquartered in Denver, Colorado, and its primary operations are conducted through its wholly owned subsidiary, NBH Bank, (the "Bank"), a Colorado state-chartered bank and a member of the Federal Reserve System. The Company provides a variety of banking products to both commercial and consumer clients through a network of 101 banking centers, as of March 31, 2020, located primarily in Colorado and the greater Kansas City region, and through online and mobile banking products and services. ​ The accompanying interim unaudited consolidated financial statements serve to update the National Bank Holdings Corporation Annual Report on Form 10-K Form 10-K ​ General economic conditions have been declining as a result of the COVID-19 pandemic, which has caused substantial disruption to the communities we serve and has changed the way we live and work. The length of the pandemic and the efficacy of the extraordinary government-mandated measures that have been put into place to address it are unknown, but have already had, and are likely to continue to have, a significant impact to the financial condition and operations of the Company. ​ GAAP requires management to make estimates that affect the reported amounts of assets, liabilities, revenues and expenses, and disclosures of contingent assets and liabilities. By their nature, estimates are based on judgment and available information. Management has made significant estimates in certain areas, such as the amount and timing of expected cash flows from assets, the valuation of other real estate owned (“OREO”), the fair value adjustments on assets acquired and liabilities assumed, the valuation of core deposit intangible assets, the valuation of investment securities, the valuation of stock-based compensation, the valuation of mortgage servicing rights (“MSRs”), the fair values of financial instruments, the allowance for credit losses (“ACL”) and contingent liabilities. Because of the inherent uncertainties associated with any estimation process and future changes in market and economic conditions, it is possible that actual results could differ significantly from those estimates. ​ The Company's significant accounting policies followed in the preparation of the unaudited consolidated financial statements are disclosed in note 2 of the audited financial statements and notes for the year ended December 31, 2019 and are contained in the Company's Annual Report on Form 10-K ​ Allowance for credit losses (“ACL”) Measurement of Credit Losses on Financial Instruments ​ Loans ​ The ACL represents management’s estimate of lifetime credit losses inherent in loans as of the balance sheet date. The Company measures expected credit losses for loans on a pooled basis when similar risk characteristics exist. The Company has identified four primary loan segments that are further stratified into 11 loan classes to provide more granularity in analyzing loss history based upon specific loss drivers and risk factors affecting each loan class. Generally, the underlying risk of loss for each of these loan classes will follow certain norms/trends in various economic environments. Loans that do not share risk characteristics are evaluated on an individual basis and are not included in the collective evaluation. Those loans include loans on non-accrual status, loans in bankruptcy, and troubled debt restructurings (“TDRs”) described below. If a specific allowance is warranted based on the borrower’s overall financial condition, the specific allowance is calculated based on discounted expected cash flows using the loan’s initial contractual effective interest rate or the fair value of the collateral less selling costs for collateral-dependent loans. ​ The Company utilizes a discounted cash flow ("DCF") model developed within a third-party software tool to establish expected lifetime credit losses for the loan portfolio. The ACL is calculated as the difference between the amortized cost basis and the projections from the DCF analysis. The DCF model allows for individual life of loan cash flow modeling, excluding extensions and renewals, using loan specific interest rates and repayment schedules. The model incorporates forecasts of certain national macroeconomic factors which drive correlated Probability of Default (“PD”) and Loss Given Default (“LGD”) rates, which in turn, drive the losses predicted in establishing our ACL. PD and LGD rates along with prepayment rates and loss recovery time delays are determined at a loan class level making use of both internal and peer historical loss rate data. The determination and application of the ACL accounting policy involves judgments, estimates, and uncertainties that are subject to change. For periods beyond the near term, we revert to historical long-term average loss rates on a straight-line basis. The length of the forecast and reversion periods is based on management’s assessment of the length and pattern of the current economic cycle. ​ Management accounts for the inherent uncertainty of the underlying economic forecast by reviewing and weighting alternate forecast scenarios. Additionally, the ACL calculation includes subjective adjustments for qualitative risk factors that are likely to cause estimated credit losses to differ from historical experience. These qualitative adjustments may increase or reduce reserve levels and include adjustments for lending management experience and risk tolerance, loan review and audit results, asset quality and portfolio trends, loan portfolio growth and industry concentrations. The Company has elected to exclude accrued interest receivable ("AIR") from the allowance for credit losses calculation. When a loan is placed on non-accrual, any recorded AIR is reversed against interest income. ​ The determination and application of the ACL accounting policy involves judgments, estimates, and uncertainties that are subject to change. Changes in these assumptions, estimates or the conditions surrounding them may have a material impact on our financial condition, liquidity or results of operations. Various regulatory agencies, as an integral part of the examination process, periodically review the ACL. Such agencies may require the Company to recognize additions to the ACL or reserve increases to adversely graded classified loans based on their judgments about information available to them at the time of their examinations. ​ The ACL is decreased by net charge-offs and is increased by provisions for loan losses that are charged to the statements of operations. Charge-offs, if any, are typically measured for each loan based on a thorough analysis of the most probable source of repayment, such as the present value of the loan’s expected future cash flows, the loan’s estimated fair value, or the estimated fair value of the underlying collateral less costs of disposition for collateral-dependent loans. When it is determined that specific loans, or portions thereof, are uncollectible, these amounts are charged off against the ACL. ​ The Company uses an internal risk rating system to indicate credit quality in the loan portfolio. The risk rating system is applied to all loans and uses a series of grades, which reflect management’s assessment of the risk attributable to loans based on an analysis of the borrower’s financial condition and ability to meet contractual debt service requirements. Loans that management perceives to have acceptable risk are categorized as “Pass” loans. The “Special Mention” loans represent loans that have potential credit weaknesses that deserve management’s close attention. Special mention loans include borrowers that have potential weaknesses or unwarranted risks that, unless corrected, may threaten the borrower’s ability to meet debt requirements. However, these borrowers are still believed to have the ability to respond to and resolve the financial issues that threaten their financial situation. Loans classified as “Substandard” are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard loans have a distinct possibility of loss if the deficiencies are not corrected. “Doubtful” loans are loans that management believes the collection of payments in accordance with the terms of the loan agreement is highly questionable and improbable. Credit quality indicators are reviewed and updated in accordance with internal policy based on loan balance and risk rating. Interest accrual is discontinued on doubtful loans and certain substandard loans, as is more fully discussed in note 4. ​ Unfunded loan commitments ​ In addition to the ACL for funded loans, the Company maintains reserves to cover the risk of loss associated with off-balance sheet unfunded loan commitments. The allowance for off-balance sheet credit losses is maintained within the other liabilities in the statements of financial condition. Under the CECL framework, adjustments to this liability are recorded as provision for credit losses in the statements of operations. Unfunded loan commitment balances are evaluated by loan class and further segregated by revolving and non-revolving commitments. In order to establish the required level of reserve, the Company applies average historical utilization rates and ACL loan model loss rates for each loan class to the outstanding unfunded commitment balances. ​ Investment securities ​ Management evaluates all investments in an unrealized loss position on a quarterly basis, and more frequently when economic or market conditions warrant such evaluation. If the Company has the intent to sell the security or it is more likely than not that the Company will be required to sell the security, the security is written down to fair value and the entire loss is recorded in earnings. If either of the above criteria is not met, we evaluate whether the decline in fair value is the result of credit losses or other factors. In making the assessment, we may consider various factors including the extent to which fair value is less than amortized cost, performance on any underlying collateral, downgrades in the ratings of the security by a rating agency, the failure of the issuer to make scheduled interest or principal payments and adverse conditions specifically related to the security. If the assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any excess is recorded as an allowance for credit loss. For U.S. agency-backed securities, since the risk of nonpayment of the amortized cost basis is zero, the Company will not measure expected credit losses on these securities. When the loss is not considered a result of credit loss, the cost basis of the security is written down to fair value, with the loss charge recognized in AOCI. Credit losses are not estimated for AIR from investment securities as interest deemed uncollectible is written off through interest income.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2020
Recent Accounting Pronouncements
Recent Accounting Pronouncements	Note 2 Recent Accounting Pronouncements ​ Financial Instruments - Credit Losses Measurement of Credit Losses on Financial Instruments retained ​ Other Pronouncements Fair Value Measurement Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement , Intangibles - Goodwill and Other Simplifying the Test for Goodwill Impairment ​

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Note 3 Investment Securities ​ The Company’s investment securities portfolio is comprised of available-for-sale and held-to-maturity investment securities. These investment securities totaled $0.8 billion at March 31, 2020 and included $0.6 billion of available-for-sale securities and $0.2 billion of held-to-maturity securities. At December 31, 2019, investment securities totaled $0.8 billion and included $0.6 billion of available-for-sale securities and $0.2 billion of held-to-maturity securities. ​ Available-for-sale ​ Available-for-sale securities are summarized as follows as of the dates indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ Amortized Gross Gross ​ ​ ​ ​ cost ​ unrealized gains ​ unrealized losses ​ Fair value Mortgage-backed securities (“MBS”): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 85,972 ​ $ 2,577 ​ $ — ​ $ 88,549 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 528,397 ​ 11,588 ​ (110) ​ 539,875 Municipal securities ​ ​ 495 ​ ​ 8 ​ ​ — ​ ​ 503 Other securities ​ 469 ​ — ​ — ​ 469 Total investment securities available-for-sale ​ $ 615,333 ​ $ 14,173 ​ $ (110) ​ $ 629,396 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Amortized Gross Gross ​ ​ ​ ​ cost ​ unrealized gains ​ unrealized losses ​ Fair value Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 93,770 ​ $ 1,497 ​ $ (11) ​ $ 95,256 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 543,275 ​ 3,818 ​ (5,056) ​ 542,037 Municipal securities ​ ​ 495 ​ ​ — ​ ​ (8) ​ ​ 487 Other securities ​ 469 ​ — ​ — ​ 469 Total investment securities available-for-sale ​ $ 638,009 ​ $ 5,315 ​ $ (5,075) ​ $ 638,249 ​ At March 31, 2020 and December 31, 2019, mortgage-backed securities represented primarily all of the Company’s available-for-sale investment portfolio and all mortgage-backed securities were backed by government sponsored enterprises (“GSE”) collateral such as Federal Home Loan Mortgage Corporation (“FHLMC”) and Federal National Mortgage Association (“FNMA”), and the government owned agency Government National Mortgage Association (“GNMA”). ​ The tables below summarize the available-for-sale securities with unrealized losses as of the dates shown, along with the length of the impairment period: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ value ​ losses ​ value ​ losses ​ value ​ losses Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ ​ 6,257 ​ ​ (3) ​ ​ 7,007 ​ ​ (107) ​ ​ 13,264 ​ ​ (110) Total ​ $ 6,257 ​ $ (3) ​ $ 7,007 ​ $ (107) ​ $ 13,264 ​ $ (110) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ value ​ losses ​ value ​ losses ​ value ​ losses Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 10,413 ​ $ (7) ​ $ 1,421 ​ $ (4) ​ $ 11,834 ​ $ (11) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 41,983 ​ ​ (281) ​ 254,380 ​ (4,775) ​ 296,363 ​ ​ (5,056) Municipal securities ​ ​ — ​ ​ — ​ ​ 372 ​ ​ (8) ​ ​ 372 ​ ​ (8) Total ​ $ 52,396 ​ $ (288) ​ $ 256,173 ​ $ (4,787) ​ $ 308,569 ​ $ (5,075) ​ Management evaluated all of the available-for-sale securities in an unrealized loss position at March 31, 2020 and December 31, 2019. The portfolio included 10 securities, which were in an unrealized loss position at March 31, 2020, compared to 67 securities at December 31, 2019. The unrealized losses in the Company's investment portfolio at March 31, 2020 were caused by changes in interest rates. The Company has no intention to sell these securities and believes it will not be required to sell the securities before the recovery of their amortized cost. Management believes that default of the available-for-sale securities is highly unlikely. FHLMC, FNMA and GNMA guaranteed mortgage-backed securities have a long history of zero credit losses, an explicit guarantee by the U.S. government (although limited for FNMA and FHLMC securities) and yields that generally trade based on market views of prepayment and liquidity risk rather than credit risk. As such, no allowance for credit loss was recorded as of March 31, 2020. ​ Certain securities are pledged as collateral for public deposits, securities sold under agreements to repurchase and to secure borrowing capacity at the Federal Reserve Bank (“FRB”), if needed. The fair value of available-for-sale investment securities pledged as collateral totaled $372.1 million and $352.3 million at March 31, 2020 and December 31, 2019, respectively. The Bank had available-for-sale and held-to-maturity investment securities pledged as collateral for Federal Home Loan Bank (“FHLB”) advances totaling $16.5 million and $17.6 million at March 31, 2020 and December 31, 2019, respectively. ​ Mortgage-backed securities may have actual maturities that differ from contractual maturities depending on the repayment characteristics and experience of the underlying financial instruments. As of March 31, 2020, the entire municipal securities portfolio with an amortized cost and fair value ​ As of March 31, 2020 and December 31, 2019, AIR from available-for-sale investment securities totaled $1.7 million and $1.5 million, respectively, and was included with other assets on the statements of financial condition. ​ Held-to-maturity ​ Held-to-maturity investment securities are summarized as follows as of the dates indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ ​ ​ ​ ​ cost ​ gains ​ losses ​ Fair value Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 144,218 ​ $ 4,065 ​ $ — ​ $ 148,283 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 48,684 ​ 630 ​ — ​ 49,314 Total investment securities held-to-maturity ​ $ 192,902 ​ $ 4,695 ​ $ — ​ $ 197,597 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ ​ ​ ​ ​ cost ​ gains ​ losses ​ Fair value Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 127,560 ​ $ 1,239 ​ $ (29) ​ $ 128,770 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 55,324 ​ 82 ​ (435) ​ 54,971 Total investment securities held-to-maturity ​ $ 182,884 ​ $ 1,321 ​ $ (464) ​ $ 183,741 ​ There were no held-to-maturity securities in an unrealized loss position as of March 31, 2020 compared to 13 securities at December 31, 2019. The table below summarizes the held-to-maturity securities with unrealized losses as of December 31, 2019, along with the length of the impairment period: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ value ​ losses ​ value ​ losses ​ value ​ losses Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 10,478 ​ $ (26) ​ $ 338 ​ $ (3) ​ $ 10,816 ​ $ (29) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 3,925 ​ ​ (9) ​ ​ 28,554 ​ ​ (426) ​ 32,479 ​ ​ (435) Total ​ $ 14,403 ​ $ (35) ​ $ 28,892 ​ $ (429) ​ $ 43,295 ​ $ (464) ​ The Company does not measure expected credit losses on a financial asset, or group of financial assets, in which historical credit loss information adjusted for current conditions and reasonable and supportable forecasts results in an expectation that nonpayment of the amortized cost basis is zero. Management evaluated held-to-maturity securities noting they are backed by loans guaranteed by either U.S. government agencies or U.S. government sponsored entities, and management believes that default is highly unlikely given this governmental backing and long history without credit losses. Additionally, management notes that yields on which the portfolio generally trades are based upon market views of prepayment and liquidity risk and not credit risk. The Company has no intention to sell any held-to-maturity securities and believes it will not be required to sell any held-to-maturity securities before the recovery of their amortized cost. ​ The carrying value of held-to-maturity investment securities pledged as collateral totaled $168.4 million and $144.2 million at March 31, 2020 and December 31, 2019, respectively. ​ Actual maturities of mortgage-backed securities may differ from scheduled maturities depending on the repayment characteristics and experience of the underlying financial instruments. ​ As of March 31, 2020 and December 31, 2019, AIR from held-to-maturity investment securities totaled $0.5 million and $0.5 million, respectively, and was included with other assets on the statements of financial condition. ​

Loans

Loans	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Loans	Note 4 Loans ​ The loan portfolio is comprised of loans originated by the Company and loans that were acquired in connection with the Company’s acquisitions. During the first quarter of 2020, the Company updated its loan classifications to include energy loans within the commercial and industrial loan class and present municipal and non-profit loans as their own class within the commercial segment. Additionally, loans previously referred to as “310-30 loans” are included in “acquired loans”. The prior year presentation has been reclassified to conform to the current year presentation. In addition, as the concept of impaired loans does not exist under CECL, disclosures that related solely to impaired loans have been removed. ​ The tables below show the loan portfolio composition including carrying value by segment as of the dates shown. The carrying value of loans is net of discounts, fees, cost and fair value marks of $19.0 million and $21.9 million as of March 31, 2020 and December 31, 2019, respectively. ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ Total loans % of total Commercial $ 3,074,096 ​ 68.2% Commercial real estate non-owner occupied 643,727 ​ 14.3% Residential real estate 766,324 ​ 17.0% Consumer 21,588 ​ 0.5% Total $ 4,505,735 ​ 100.0% ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Total loans % of total Commercial $ 2,992,307 ​ 67.8% Commercial real estate non-owner occupied 630,906 ​ 14.3% Residential real estate 770,417 ​ 17.4% Consumer 21,776 ​ 0.5% Total $ 4,415,406 ​ 100.0% ​ Delinquency for loans is shown in the following tables at March 31, 2020 and December 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-89 days ​ than 90 days ​ ​ ​ Total past ​ ​ ​ ​ ​ ​ past due and ​ past due and ​ Non-accrual ​ due and ​ ​ ​ ​ ​ ​ accruing ​ accruing ​ loans ​ non-accrual ​ Current ​ Total loans Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ $ 4,603 ​ $ 714 ​ $ 8,920 ​ $ 14,237 ​ $ 1,424,313 ​ $ 1,438,550 Municipal and non-profit ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 877,084 ​ ​ 877,084 Owner occupied commercial real estate ​ ​ 1,085 ​ ​ 163 ​ ​ 2,314 ​ ​ 3,562 ​ ​ 512,352 ​ ​ 515,914 Food and agribusiness ​ ​ 317 ​ ​ — ​ ​ 735 ​ ​ 1,052 ​ ​ 241,496 ​ ​ 242,548 Total commercial ​ ​ 6,005 ​ ​ 877 ​ ​ 11,969 ​ ​ 18,851 ​ ​ 3,055,245 ​ ​ 3,074,096 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ — ​ — ​ — ​ — ​ 86,123 ​ 86,123 Acquisition/development ​ 60 ​ — ​ 261 ​ 321 ​ 26,982 ​ 27,303 Multifamily ​ — ​ — ​ — ​ — ​ 77,336 ​ 77,336 Non-owner occupied ​ 1,451 ​ — ​ 39 ​ 1,490 ​ 451,475 ​ 452,965 Total commercial real estate ​ 1,511 ​ — ​ 300 ​ 1,811 ​ 641,916 ​ 643,727 Residential real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior lien ​ ​ 2,640 ​ ​ 487 ​ ​ 8,257 ​ ​ 11,384 ​ ​ 663,270 ​ ​ 674,654 Junior lien ​ 483 ​ ​ — ​ ​ 763 ​ 1,246 ​ 90,424 ​ ​ 91,670 Total residential real estate ​ 3,123 ​ ​ 487 ​ ​ 9,020 ​ ​ 12,630 ​ ​ 753,694 ​ ​ 766,324 Consumer ​ 54 ​ — ​ 38 ​ 92 ​ 21,496 ​ 21,588 Total loans ​ $ 10,693 ​ $ 1,364 ​ $ 21,327 ​ $ 33,384 ​ $ 4,472,351 ​ $ 4,505,735 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ Non-accrual loans ​ Non-accrual loans ​ ​ ​ ​ with a related ​ with no related ​ ​ ​ ​ allowance for ​ allowance for ​ Non-accrual ​ credit loss ​ credit loss ​ loans Commercial: ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial $ 6,081 ​ $ 2,839 ​ $ 8,920 Municipal and non-profit ​ — ​ ​ — ​ ​ — Owner occupied commercial real estate ​ 805 ​ ​ 1,509 ​ ​ 2,314 Food and agribusiness ​ 313 ​ ​ 422 ​ ​ 735 Total commercial ​ 7,199 ​ ​ 4,770 ​ ​ 11,969 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ Construction — ​ — ​ — Acquisition/development 3 ​ 258 ​ 261 Multifamily — ​ — ​ — Non-owner occupied 39 ​ — ​ 39 Total commercial real estate 42 ​ 258 ​ 300 Residential real estate: ​ ​ ​ ​ ​ Senior lien ​ 4,778 ​ ​ 3,479 ​ ​ 8,257 Junior lien ​ 763 ​ ​ — ​ 763 Total residential real estate ​ 5,541 ​ ​ 3,479 ​ 9,020 Consumer 38 ​ — ​ 38 Total loans $ 12,820 ​ $ 8,507 ​ $ 21,327 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-89 days ​ than 90 days ​ ​ ​ Total past ​ ​ ​ ​ ​ ​ past due and ​ past due and ​ Non-accrual ​ due and ​ ​ ​ ​ ​ ​ accruing ​ accruing ​ loans ​ non-accrual ​ Current ​ Total loans Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ $ 2,252 ​ $ 879 ​ $ 10,330 ​ $ 13,461 ​ $ 1,398,070 ​ $ 1,411,531 Municipal and non-profit ​ ​ 226 ​ ​ — ​ ​ — ​ ​ 226 ​ ​ 837,300 ​ ​ 837,526 Owner occupied commercial real estate ​ 595 ​ 630 ​ ​ 2,264 ​ 3,489 ​ 486,633 ​ 490,122 Food and agribusiness ​ 190 ​ — ​ ​ 317 ​ 507 ​ 252,621 ​ 253,128 Total commercial ​ ​ 3,263 ​ ​ 1,509 ​ ​ 12,911 ​ ​ 17,683 ​ ​ 2,974,624 ​ ​ 2,992,307 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ — ​ — ​ — ​ — ​ 77,733 ​ 77,733 Acquisition/development ​ 187 ​ — ​ 416 ​ 603 ​ 26,276 ​ 26,879 Multifamily ​ — ​ — ​ — ​ — ​ 55,808 ​ 55,808 Non-owner occupied ​ 438 ​ 65 ​ 43 ​ 546 ​ 469,940 ​ 470,486 Total commercial real estate ​ 625 ​ 65 ​ 459 ​ 1,149 ​ 629,757 ​ 630,906 Residential real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior lien ​ 2,101 ​ 9 ​ ​ 7,597 ​ 9,707 ​ 668,955 ​ ​ 678,662 Junior lien ​ 245 ​ 79 ​ ​ 731 ​ ​ 1,055 ​ ​ 90,700 ​ ​ 91,755 Total residential real estate ​ 2,346 ​ 88 ​ ​ 8,328 ​ ​ 10,762 ​ ​ 759,655 ​ ​ 770,417 Consumer ​ 116 ​ — ​ 50 ​ ​ 166 ​ ​ 21,610 ​ ​ 21,776 Total loans ​ $ 6,350 ​ $ 1,662 ​ $ 21,748 ​ $ 29,760 ​ $ 4,385,646 ​ $ 4,415,406 ​ Loans are considered past due or delinquent when the contractual principal or interest due in accordance with the terms of the loan agreement remains unpaid after the due date of the scheduled payment. Non-accrual loans include non-accrual loans and TDRs on non-accrual status. There was no interest income recognized on non-accrual loans during the three months ended March 31, 2020 or 2019. ​ The Company’s internal risk rating system uses a series of grades which reflect our assessment of the credit quality of loans based on an analysis of the borrower's financial condition, liquidity and ability to meet contractual debt service requirements and are categorized as “Pass”, “Special mention”, “Substandard” and “Doubtful”. For a description of the general characteristics of the risk grades, refer to note 1 Basis of Presentation. ​ The amortized cost basis for all loans as determined by the Company’s internal risk rating system and year of origination was as follows at March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ loans ​ loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ amortized ​ converted ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ cost basis ​ to term ​ Total Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 77,093 ​ $ 263,719 ​ $ 237,591 ​ $ 107,183 ​ $ 37,660 ​ $ 40,127 ​ $ 629,234 ​ $ 11,476 ​ $ 1,404,083 Special mention ​ ​ — ​ ​ 968 ​ ​ 5,910 ​ ​ 279 ​ ​ 5,813 ​ ​ 1,226 ​ ​ 5,115 ​ ​ — ​ ​ 19,311 Substandard ​ ​ — ​ ​ 1,395 ​ ​ 1,091 ​ ​ 3,106 ​ ​ 399 ​ ​ 4,710 ​ ​ 3,314 ​ ​ — ​ ​ 14,015 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ 431 ​ ​ — ​ ​ 674 ​ ​ 36 ​ ​ — ​ ​ 1,141 Total commercial and industrial ​ ​ 77,093 ​ ​ 266,082 ​ ​ 244,592 ​ ​ 110,999 ​ ​ 43,872 ​ ​ 46,737 ​ ​ 637,699 ​ ​ 11,476 ​ ​ 1,438,550 Municipal and non-profit: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 61,222 ​ ​ 98,498 ​ ​ 142,299 ​ ​ 173,711 ​ ​ 136,171 ​ ​ 261,847 ​ ​ 3,336 ​ ​ — ​ ​ 877,084 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total municipal and non-profit ​ ​ 61,222 ​ ​ 98,498 ​ ​ 142,299 ​ ​ 173,711 ​ ​ 136,171 ​ ​ 261,847 ​ ​ 3,336 ​ ​ — ​ ​ 877,084 Owner occupied commercial real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 35,696 ​ ​ 121,398 ​ ​ 99,248 ​ ​ 51,857 ​ ​ 42,753 ​ ​ 112,635 ​ ​ 1,919 ​ ​ 638 ​ ​ 466,144 Special mention ​ ​ — ​ ​ — ​ ​ 4,775 ​ ​ 11,565 ​ ​ 5,687 ​ ​ 17,558 ​ ​ — ​ ​ — ​ ​ 39,585 Substandard ​ ​ — ​ ​ — ​ ​ 3,965 ​ ​ — ​ ​ — ​ ​ 6,220 ​ ​ — ​ ​ — ​ ​ 10,185 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total owner occupied commercial real estate ​ ​ 35,696 ​ ​ 121,398 ​ ​ 107,988 ​ ​ 63,422 ​ ​ 48,440 ​ ​ 136,413 ​ ​ 1,919 ​ ​ 638 ​ ​ 515,914 Food and agribusiness: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 5,778 ​ ​ 11,194 ​ ​ 35,979 ​ ​ 7,858 ​ ​ 10,637 ​ ​ 30,853 ​ ​ 137,246 ​ ​ 409 ​ ​ 239,954 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 926 ​ ​ — ​ ​ — ​ ​ 926 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ 319 ​ ​ — ​ ​ 1,086 ​ ​ 231 ​ ​ — ​ ​ 1,636 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ 26 ​ ​ — ​ ​ 32 Total food and agribusiness ​ ​ 5,778 ​ ​ 11,194 ​ ​ 35,979 ​ ​ 8,177 ​ ​ 10,637 ​ ​ 32,871 ​ ​ 137,503 ​ ​ 409 ​ ​ 242,548 Total commercial ​ ​ 179,789 ​ ​ 497,172 ​ ​ 530,858 ​ ​ 356,309 ​ ​ 239,120 ​ ​ 477,868 ​ ​ 780,457 ​ ​ 12,523 ​ ​ 3,074,096 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 6,573 ​ ​ 32,167 ​ ​ 16,823 ​ ​ 24,059 ​ ​ — ​ ​ — ​ ​ 5,688 ​ ​ 659 ​ ​ 85,969 Special mention ​ ​ 154 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 154 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total construction ​ ​ 6,727 ​ ​ 32,167 ​ ​ 16,823 ​ ​ 24,059 ​ ​ — ​ ​ — ​ ​ 5,688 ​ ​ 659 ​ ​ 86,123 Acquisition/development: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 4,659 ​ ​ 2,424 ​ ​ 2,313 ​ ​ 8,554 ​ ​ 4,598 ​ ​ 4,177 ​ ​ 95 ​ ​ — ​ ​ 26,820 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ 37 ​ ​ — ​ ​ 446 ​ ​ — ​ ​ — ​ ​ 483 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total acquisition/development ​ ​ 4,659 ​ ​ 2,424 ​ ​ 2,313 ​ ​ 8,591 ​ ​ 4,598 ​ ​ 4,623 ​ ​ 95 ​ ​ — ​ ​ 27,303 Multifamily: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 21,468 ​ ​ 13,886 ​ ​ 1,832 ​ ​ 8,387 ​ ​ 21,374 ​ ​ 9,912 ​ ​ — ​ ​ — ​ ​ 76,859 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 5 ​ ​ — ​ ​ — ​ ​ 5 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 472 ​ ​ — ​ ​ — ​ ​ 472 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total multifamily ​ ​ 21,468 ​ ​ 13,886 ​ ​ 1,832 ​ ​ 8,387 ​ ​ 21,374 ​ ​ 10,389 ​ ​ — ​ ​ — ​ ​ 77,336 Non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 31,400 ​ ​ 92,052 ​ ​ 29,996 ​ ​ 126,447 ​ ​ 34,583 ​ ​ 129,563 ​ ​ 2,125 ​ ​ — ​ ​ 446,166 Special mention ​ ​ — ​ ​ — ​ ​ 4,360 ​ ​ 174 ​ ​ — ​ ​ 1,312 ​ ​ — ​ ​ — ​ ​ 5,846 Substandard ​ ​ — ​ ​ — ​ ​ 66 ​ ​ — ​ ​ — ​ ​ 887 ​ ​ — ​ ​ — ​ ​ 953 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total non-owner occupied ​ ​ 31,400 ​ ​ 92,052 ​ ​ 34,422 ​ ​ 126,621 ​ ​ 34,583 ​ ​ 131,762 ​ ​ 2,125 ​ ​ — ​ ​ 452,965 Total commercial real estate ​ ​ 64,254 ​ ​ 140,529 ​ ​ 55,390 ​ ​ 167,658 ​ ​ 60,555 ​ ​ 146,774 ​ ​ 7,908 ​ ​ 659 ​ ​ 643,727 Residential real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 33,597 ​ ​ 115,680 ​ ​ 61,000 ​ ​ 71,750 ​ ​ 120,014 ​ ​ 234,663 ​ ​ 27,935 ​ ​ 276 ​ ​ 664,915 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 444 ​ ​ 249 ​ ​ — ​ ​ 693 Substandard ​ ​ 102 ​ ​ 373 ​ ​ 32 ​ ​ 1,567 ​ ​ 547 ​ ​ 6,333 ​ ​ — ​ ​ 92 ​ ​ 9,046 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total senior lien ​ ​ 33,699 ​ ​ 116,053 ​ ​ 61,032 ​ ​ 73,317 ​ ​ 120,561 ​ ​ 241,440 ​ ​ 28,184 ​ ​ 368 ​ ​ 674,654 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ loans ​ loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ amortized ​ converted ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ cost basis ​ to term ​ Total Junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 1,327 ​ ​ 6,180 ​ ​ 3,962 ​ ​ 2,251 ​ ​ 1,067 ​ ​ 5,010 ​ ​ 69,799 ​ ​ 828 ​ ​ 90,424 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 21 ​ ​ 344 ​ ​ — ​ ​ 365 Substandard ​ ​ — ​ ​ — ​ ​ 231 ​ ​ 116 ​ ​ 180 ​ ​ 280 ​ ​ 74 ​ ​ — ​ ​ 881 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total junior lien ​ ​ 1,327 ​ ​ 6,180 ​ ​ 4,193 ​ ​ 2,367 ​ ​ 1,247 ​ ​ 5,311 ​ ​ 70,217 ​ ​ 828 ​ ​ 91,670 Total residential real estate ​ ​ 35,026 ​ ​ 122,233 ​ ​ 65,225 ​ ​ 75,684 ​ ​ 121,808 ​ ​ 246,751 ​ ​ 98,401 ​ ​ 1,196 ​ ​ 766,324 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 3,347 ​ ​ 8,797 ​ ​ 2,933 ​ ​ 1,292 ​ ​ 821 ​ ​ 1,077 ​ ​ 3,212 ​ ​ 71 ​ ​ 21,550 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ 26 ​ ​ 11 ​ ​ — ​ ​ — ​ ​ 38 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total consumer ​ ​ 3,347 ​ ​ 8,798 ​ ​ 2,933 ​ ​ 1,292 ​ ​ 847 ​ ​ 1,088 ​ ​ 3,212 ​ ​ 71 ​ ​ 21,588 Total loans ​ $ 282,416 ​ $ 768,732 ​ $ 654,406 ​ $ 600,943 ​ $ 422,330 ​ $ 872,481 ​ $ 889,978 ​ $ 14,449 ​ $ 4,505,735 ​ Loans evaluated individually ​ We evaluate loans individually when they no longer share risk characteristics with pooled loans. These loans include loans on non-accrual status, loans in bankruptcy, and TDRs described below. If a specific allowance is warranted based on the borrower’s overall financial condition, the specific allowance is calculated based on discounted expected cash flows using the loan’s initial contractual effective interest rate or the fair value of the collateral less selling costs for collateral-dependent loans. ​ A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. Management individually evaluates collateral-dependent loans with an amortized cost basis of $250 thousand or more and includes collateral-dependent loans less than $250 thousand within the general allowance population. The amortized cost basis of collateral-dependent loans over $250 thousand was as follows at March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ Total amortized ​ Real property ​ Business assets ​ cost basis Commercial ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial $ 5,965 ​ $ 3,519 ​ $ 9,484 Owner-occupied commercial real estate ​ 1,331 ​ ​ — ​ ​ 1,331 Food and agribusiness ​ 422 ​ ​ 314 ​ ​ 736 Total Commercial ​ 7,718 ​ ​ 3,833 ​ ​ 11,551 Commercial real estate non owner-occupied ​ ​ ​ ​ ​ ​ ​ ​ Acquisition/development 1,303 ​ — ​ 1,303 Total commercial real estate 1,303 ​ — ​ 1,303 Residential real estate ​ ​ ​ ​ ​ Senior lien 3,479 ​ — ​ 3,479 Total residential real estate 3,479 ​ — ​ 3,479 Total loans $ 12,500 ​ $ 3,833 ​ $ 16,333 ​ Troubled debt restructurings ​ The Company’s policy is to review each prospective credit to determine the appropriateness and the adequacy of security or collateral prior to making a loan. In the event of borrower default, the Company seeks recovery in compliance with lending laws, the respective loan agreements, and credit monitoring and remediation procedures that may include restructuring a loan to provide a concession by the Company to the borrower from their original terms due to borrower financial difficulties in order to facilitate repayment. Additionally, if a borrower’s repayment obligation has been discharged by a court, and that debt has not been reaffirmed by the borrower, regardless of past due status, the loan is considered to be a TDR. ​ During the three months ended March 31, 2020, the Company had four loan modifications totaling $122 thousand due to the effects of the COVID-19 pandemic that were not identified as TDRs, consistent with the Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus. The Company anticipates additional loans to be restructured due to the effects of COVID-19 in the coming periods that will not be identified as TDRs. ​ During the three months ended March 31, 2020, the Company restructured 2 loans with an amortized cost basis of $1.9 million to facilitate repayment. Included in the total TDR balance as of March 31, 2020 were loans totaling $4.2 million previously accounted for under ASC 310-30. Loan modifications were a reduction of the principal payment, a reduction in interest rate, or an extension of term. The tables below provide additional information related to accruing TDRs at March 31, 2020 and December 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Amortized ​ Average year-to-date ​ Unpaid ​ Unfunded commitments ​ ​ cost basis ​ amortized cost basis ​ principal balance ​ to fund TDRs Commercial ​ $ 6,093 ​ $ 6,155 ​ $ 6,781 ​ $ 150 Commercial real estate non-owner occupied ​ 2,183 ​ 2,208 ​ 4,428 ​ — Residential real estate ​ 2,009 ​ 2,023 ​ 2,893 ​ 12 Consumer ​ — ​ — ​ — ​ — Total ​ $ 10,285 ​ $ 10,386 ​ $ 14,102 ​ $ 162 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Amortized ​ Average year-to-date ​ Unpaid ​ Unfunded commitments ​ ​ cost basis ​ amortized cost basis ​ principal balance ​ to fund TDRs Commercial ​ $ 5,615 ​ $ 5,788 ​ $ 5,714 ​ $ — Commercial real estate non-owner occupied ​ 141 ​ 172 ​ 192 ​ — Residential real estate ​ 1,129 ​ 1,178 ​ 1,206 ​ 12 Consumer ​ — ​ — ​ — ​ — Total ​ $ 6,885 ​ $ 7,138 ​ $ 7,112 ​ $ 12 ​ The following table summarizes the Company’s carrying value of non-accrual TDRs as of March 31, 2020 and December 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 Commercial $ 1,873 $ 1,891 Commercial real estate non-owner occupied ​ 257 ​ 410 Residential real estate ​ 2,560 ​ 2,553 Consumer ​ — ​ — Total non-accruing TDRs ​ $ 4,690 ​ $ 4,854 ​ Accrual of interest is resumed on loans that were previously on non-accrual only after the loan has performed sufficiently for a period of time. The Company had five TDRs totaling $0.8 million that were modified within the past twelve months and had defaulted on their restructured terms during the three months ended March 31, 2020. During the three months ended March 31, 2019, the Company had two TDRs totaling $0.2 million that were modified within the past twelve months and had defaulted on their restructured terms. For purposes of this disclosure, the Company considers “default” to mean 90 days or more past due on principal or interest. The allowance for credit losses related to TDRs on non-accrual status is determined by individual evaluation, including collateral adequacy, using the same process as loans on non-accrual status which are not classified as TDRs. ​

Allowance for Credit Losses

Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2020
Credit Loss [Abstract]
Allowance for Credit Losses	Note 5 Allowance for Credit Losses ​ The table below details the Company’s allowance for credit losses as of and for the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended March 31, 2020 ​ ​ ​ ​ ​ Non-owner ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ commercial ​ Residential ​ ​ ​ ​ ​ ​ ​ Commercial real estate real estate Consumer Total Beginning balance ​ $ 30,442 ​ $ 4,850 ​ $ 3,468 ​ $ 304 ​ $ 39,064 Cumulative effect adjustment (1) ​ ​ (1,299) ​ ​ 1,666 ​ ​ 5,314 ​ ​ 155 ​ ​ 5,836 Charge-offs ​ (218) ​ — ​ (28) ​ ​ (251) ​ (497) Recoveries ​ 91 ​ — ​ 5 ​ 48 ​ 144 Provision ​ 1,541 ​ 2,762 ​ 1,937 ​ 169 ​ 6,409 Ending balance ​ $ 30,557 ​ $ 9,278 ​ $ 10,696 ​ $ 425 ​ $ 50,956 ​ ​ ​ (1) ​ Related to the adoption of Accounting Standards Update No. 2016-13, Measurement of Credit Losses on Financial Instruments ​ The table below details the Company’s allowance for loan losses as of and for the three months ended March 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended March 31, 2019 ​ ​ ​ ​ ​ Non-owner ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ commercial ​ Residential ​ ​ ​ ​ ​ ​ ​ Commercial real estate real estate Consumer Total Beginning balance ​ $ 27,137 ​ $ 4,406 ​ $ 3,800 ​ $ 349 ​ $ 35,692 Charge-offs ​ (12) ​ — ​ (23) ​ (233) ​ (268) Recoveries ​ 27 ​ 11 ​ 13 ​ 46 ​ 97 Provision ​ 923 ​ 497 ​ (72) ​ 186 ​ 1,534 Ending balance ​ $ 28,075 ​ $ 4,914 ​ $ 3,718 ​ $ 348 ​ $ 37,055 ​ ​ In evaluating the loan portfolio for an appropriate ACL level, excluding loans evaluated individually, loans were grouped into segments based on broad characteristics such as primary use and underlying collateral. Within the segments, the portfolio was further disaggregated into classes of loans with similar attributes and risk characteristics for purposes of developing the underlying data used within the discounted cash flow model including, but not limited to, prepayment and recovery rates as well as loss rates tied to macro-economic conditions within management’s reasonable and supportable forecast. The ACL also includes subjective adjustments based upon qualitative risk factors including asset quality, loss trends, lending management, portfolio growth and loan review/internal audit results. ​ Net charge-offs on loans during the three months ended March 31, 2020 and 2019 were $0.4 million and $0.2 million, respectively. Provision for loan losses for funded loans totaled $6.4 million for the three months ended March 31, 2020 to support originated loan growth, net charge-offs and provides coverage for the impact of deterioration in the macro-economic environment as a result of COVID-19. Provision for loan losses totaled $1.5 million for the three months ended March 31, 2019 to support originated loan growth and net charge-offs. ​ The Company has elected to exclude AIR from the allowance for credit losses calculation. As of March 31, 2020 and December 31, 2019, AIR from loans totaled $19.8 million and $17.2 million, respectively.

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2020
Other Real Estate Owned
Other Real Estate Owned	Note 6 Other Real Estate Owned ​ A summary of the activity in OREO during the three months ended March 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended March 31, ​ 2020 ​ 2019 Beginning balance $ 7,300 $ 10,596 Transfers from loan portfolio, at fair value 18 ​ 288 Impairments — ​ (596) Sales (267) ​ (894) Ending balance $ 7,051 ​ $ 9,394 ​ During the three months ended March 31, 2020, the Company sold $0.3 million of OREO. Sales resulted in net OREO losses of $39 thousand and net OREO gains of $0.4 million during the three months ended March 31, 2020 and 2019, respectively, which were included in the consolidated statements of operations.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets
Goodwill and Intangible Assets	Note 7 Goodwill and Intangible Assets ​ Goodwill and core deposit intangible ​ In connection with our acquisitions, the Company recorded goodwill of $115.0 million. Goodwill is measured as the excess of the fair value of consideration paid over the fair value of net assets acquired. No goodwill impairment was recorded during the three months ended March 31, 2020 or the year ended December 31, 2019. ​ The gross carrying amount of the core deposit intangibles and the associated accumulated amortization at March 31, 2020 and December 31, 2019, are presented as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 ​ Gross ​ ​ ​ ​ Net ​ Gross ​ ​ ​ ​ Net ​ carrying ​ Accumulated ​ carrying ​ carrying ​ Accumulated ​ carrying ​ amount ​ amortization ​ amount ​ amount ​ amortization ​ amount Core deposit intangible $ 48,834 $ (40,399) ​ $ 8,435 ​ $ 48,834 $ (40,103) ​ $ 8,731 ​ The Company is amortizing the core deposit intangibles from acquisitions on a straight line basis over 7 ​ The following table shows the estimated future amortization expense for the core deposit intangibles as of March 31, 2020: ​ ​ ​ ​ Years ending December 31, ​ Amount For the nine months ending December 31, 2020 $ 887 For the year ending December 31, 2021 ​ 1,183 For the year ending December 31, 2022 ​ 1,127 For the year ending December 31, 2023 ​ 1,048 For the year ending December 31, 2024 ​ 1,048 ​ Mortgage servicing rights ​ MSRs represent rights to service loans originated by the Company and sold to government sponsored enterprises including FHLMC, FNMA, GNMA and FHLB. Mortgage loans serviced for others were $301.8 million and $376.0 million at March 31, 2020 and 2019, respectively, and are included in other assets in the consolidated statements of financial condition. ​ Below are the changes in the MSRs for the periods presented: ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended March 31, ​ 2020 ​ 2019 Beginning balance $ 2,630 $ 3,556 Originations ​ 142 ​ ​ 13 Impairment ​ (509) ​ ​ (54) Amortization (210) ​ (153) Ending balance $ 2,053 ​ $ 3,362 Fair value of mortgage servicing rights $ 2,053 ​ $ 3,564 ​ The fair value of MSRs was determined based upon a discounted cash flow analysis. The cash flow analysis included assumptions for discount rates and prepayment speeds. Discount rates ranged from 9.5% to 10.5%, and the constant prepayment speed ranged from 16.9% to 21.4% for the March 31, 2020 valuation. Discount rates ranged from 9.5% to 10.5%, and the constant prepayment speed ranged from 13.4% to 19.8% for the March 31, 2019 valuation. Included in mortgage banking income in the consolidated statements of operations were service fees of $0.2 million and $0.3 million for the three months ended March 31, 2020 and 2019, respectively. ​ MSRs are evaluated, and impairment is recognized to the extent fair value is less than the carrying amount. The Company evaluates impairment by stratifying MSRs based on the predominant risk characteristics of the underlying loans, including loan type and loan term. The Company is amortizing the MSRs in proportion to and over the period of the estimated net servicing income of the underlying loans. ​ The following table shows the estimated future amortization expense for the MSRs as of March 31, 2020: ​ ​ ​ ​ Years ending December 31, ​ Amount For the nine months ending December 31, 2020 $ 359 For the year ending December 31, 2021 ​ 395 For the year ending December 31, 2022 ​ 303 For the year ending December 31, 2023 ​ 232 For the year ending December 31, 2024 ​ 178 ​

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2020
Borrowings
Borrowings	Note 8 Borrowings ​ The Company enters into repurchase agreements to facilitate the needs of its clients. As of March 31, 2020 and December 31, 2019, the Company sold securities under agreements to repurchase totaling $23.7 million and $56.9 million, respectively. The Company pledged mortgage-backed securities with a fair value of approximately $38.2 million and $65.6 million as of March 31, 2020 and December 31, 2019, respectively, for these agreements. The Company monitors collateral levels on a continuous basis and may be required to provide additional collateral based on the fair value of the underlying securities. As of March 31, 2020 and December 31, 2019, the Company had $13.8 million and $7.0 million, respectively, of excess collateral pledged for repurchase agreements. ​ As a member of the FHLB, the Bank has access to a line of credit and term financing from the FHLB with total available credit of $1.0 billion at March 31, 2020. At March 31, 2020 and December 31, 2019, the Bank had $326.5 million and $192.7 million in line of credit advances from the FHLB, respectively, that mature within a day. At March 31, 2020 and December 31, 2019, the Bank had one term advance from the FHLB totaling $15.0 million with a fixed interest rate of 2.33% and a maturity date in October 2020 . The Bank had investment securities and loans pledged as collateral for FHLB advances. Investment securities pledged were $16.5 million and $17.6 million at March 31, 2020 and December 31, 2019, respectively. Loans pledged were $1.5 billion at both March 31, 2020 and December 31, 2019. Interest expense related to FHLB advances and other short-term borrowing totaled $0.9 million and $1.5 million for the three months ended March 31, 2020 and 2019, respectively. ​

Regulatory Capital

Regulatory Capital	3 Months Ended
	Mar. 31, 2020
Regulatory Capital
Regulatory Capital	Note 9 Regulatory Capital ​ As a bank holding company, the Company is subject to regulatory capital adequacy requirements implemented by the Federal Reserve. The federal banking agencies have risk based capital adequacy regulations intended to provide a measure of capital adequacy that reflects the degree of risk associated with a banking organization’s operations. Under these regulations, assets are assigned to one of several risk categories, and nominal dollar amounts of assets and credit equivalent amounts of off-balance-sheet items are multiplied by a risk adjustment percentage for the category. ​ Under the Basel III requirements, at March 31, 2020 and December 31, 2019, the Company and the Bank met all capital requirements including the capital conservation buffer of 2.5%, which was fully phased in on January 1, 2019. The Bank had regulatory capital ratios in excess of the levels established for well-capitalized institutions, as detailed in the tables below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ ​ ​ Required to be ​ Required to be ​ ​ ​ ​ ​ ​ ​ well capitalized under ​ considered ​ ​ ​ ​ ​ ​ ​ prompt corrective ​ adequately ​ ​ Actual ​ action provisions ​ capitalized (1) ​ Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 11.1% ​ $ 633,216 N/A ​ ​ N/A 4.0% ​ $ 229,316 NBH Bank 9.5% ​ 547,337 5.0% ​ $ 286,928 4.0% ​ 229,542 Common equity tier 1 risk based capital: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 12.9% ​ $ 633,216 ​ N/A ​ ​ N/A ​ 7.0% ​ $ 344,510 NBH Bank ​ 11.1% ​ ​ 547,337 ​ 6.5% ​ $ 319,675 ​ 7.0% ​ ​ 344,266 Tier 1 risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 12.9% ​ $ 633,216 N/A ​ ​ N/A 8.5% ​ $ 418,333 NBH Bank 11.1% ​ 547,337 8.0% ​ $ 393,447 8.5% ​ 418,037 Total risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 13.8% ​ $ 679,976 N/A ​ ​ N/A 10.5% ​ $ 516,765 NBH Bank 12.1% ​ 594,097 10.0% ​ $ 491,808 10.5% ​ 516,399 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ ​ Required to be ​ Required to be ​ ​ ​ ​ ​ ​ ​ well capitalized under ​ considered ​ ​ ​ ​ ​ ​ ​ prompt corrective ​ adequately ​ ​ Actual ​ action provisions ​ capitalized (1) ​ Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 11.0% ​ $ 640,440 N/A ​ ​ N/A 4.0% ​ $ 231,950 NBH Bank 9.1% ​ 528,028 5.0% ​ $ 289,926 4.0% ​ 231,940 Common equity tier 1 risk based capital: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 13.2% ​ $ 640,440 ​ N/A ​ ​ N/A ​ 7.0% ​ $ 405,912 NBH Bank ​ 10.9% ​ ​ 528,028 ​ 6.5% ​ $ 376,903 ​ 7.0% ​ ​ 405,896 Tier 1 risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 13.2% ​ $ 640,440 N/A ​ ​ N/A 8.5% ​ $ 412,620 NBH Bank 10.9% ​ 528,028 8.0% ​ $ 387,701 8.5% ​ 411,932 Total risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 14.1% ​ $ 682,645 N/A ​ ​ N/A 10.5% ​ $ 509,707 NBH Bank 11.8% ​ 570,233 10.0% ​ $ 484,626 10.5% ​ 508,857 ​ ​ ​ ​ (1) ​ As of the fully phased-in date of January 1, 2019, including the capital conservation buffer. ​ f

Revenue from Contracts with Cli

Revenue from Contracts with Clients	3 Months Ended
	Mar. 31, 2020
Revenue from Contracts with Clients
Revenue from Contracts with Clients	​ ​ Note 10 Revenue from Contracts with Clients ​ Revenue is recognized when obligations under the terms of a contract with clients are satisfied. Below is the detail of the Company’s revenue from contracts with clients. ​ Service charges and other fees ​ Service charge fees are primarily comprised of monthly service fees, check orders, and other deposit account related fees. Other fees include revenue from processing ​ Bank card fees ​ Bank card fees are primarily comprised of debit card income, ATM fees, merchant services income, and other fees. Debit card income is primarily comprised of interchange fees earned whenever the Company’s debit cards are processed through card payment networks such as Visa. ATM fees are primarily generated when a Bank cardholder uses a non-Bank ATM or a non-Bank cardholder uses a Bank ATM. Merchant services income mainly represents fees charged to merchants to process their debit card transactions. The Company’s performance obligation for bank card fees are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month. ​ Gain on OREO sales, net ​ Gain on OREO sales, net is recognized when the Company meets its performance obligation to transfer title to the buyer. The gain or loss is measured as the excess of the proceeds received compared to the OREO carrying value. Sales proceeds are received in cash at the time of transfer. ​ The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, and non-interest expense in-scope of Topic 606 for the three months ended March 31, 2020 and 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended March 31, ​ 2020 2019 Non-interest income ​ ​ ​ ​ ​ ​ In-scope of Topic 606: ​ ​ ​ ​ ​ ​ Service charges and other fees ​ $ 4,665 ​ $ 4,843 Bank card fees ​ ​ 3,513 ​ ​ 3,428 Non-interest income (in-scope of Topic 606) ​ ​ 8,178 ​ ​ 8,271 Non-interest income (out-of-scope of Topic 606) ​ ​ 15,354 ​ ​ 8,780 Total non-interest income ​ $ 23,532 ​ $ 17,051 Non-interest expense ​ ​ ​ ​ ​ ​ In-scope of Topic 606: ​ ​ ​ ​ ​ ​ (Loss) gain on OREO sales, net ​ (39) ​ 368 Total revenue in-scope of Topic 606 ​ $ 8,139 ​ $ 8,639 ​ Contract Acquisition Costs ​ In accordance with Topic 606, an entity is required to capitalize, and subsequently amortize into expense, certain incremental costs of obtaining a contract with a client if these costs are expected to be recovered. The incremental costs of obtaining a contract are those costs that an entity incurs to obtain a contract with a client that it would not have incurred if the contract had not been obtained (for example, sales commission). The Company utilizes the practical expedient which allows entities to immediately expense contract acquisition costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. The Company has not capitalized any contract acquisition costs.

Stock-based Compensation and Be

Stock-based Compensation and Benefits	3 Months Ended
	Mar. 31, 2020
Stock-based Compensation and Benefits
Stock-based Compensation and Benefits	Note 11 Stock-based Compensation and Benefits ​ The Company provides stock-based compensation in accordance with shareholder-approved plans. In 2014, shareholders approved the 2014 Omnibus Incentive Plan (the "2014 Plan"). The 2014 Plan replaces the NBH Holdings Corp. 2009 Equity Incentive Plan (the "Prior Plan"), pursuant to which the Company granted equity awards prior to the approval of the 2014 Plan. Pursuant to the 2014 Plan, the Compensation Committee of the Board of Directors has the authority to grant, from time to time, awards of stock options, stock appreciation rights, restricted stock, restricted stock units, performance units, other stock-based awards, or any combination thereof to eligible persons. ​ Stock options ​ The Company issues stock options which are primarily time-vesting with 1/3 1 10-year ​ The following table summarizes stock option activity for the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ ​ average ​ ​ ​ ​ ​ ​ ​ Weighted ​ remaining ​ ​ ​ ​ ​ ​ ​ average ​ contractual ​ Aggregate ​ ​ ​ ​ exercise ​ term in ​ intrinsic ​ ​ Options ​ price ​ years ​ value Outstanding at December 31, 2019 657,114 ​ $ 26.69 6.41 ​ $ 5,626 Granted — ​ — ​ ​ ​ ​ ​ Exercised ​ (2,479) ​ ​ 20.18 ​ ​ ​ ​ ​ Forfeited (2,326) ​ 32.01 ​ ​ ​ ​ ​ Outstanding at March 31, 2020 652,309 ​ $ 26.69 6.17 ​ $ 1,438 Options exercisable at March 31, 2020 402,235 ​ ​ 22.31 4.76 ​ ​ 1,438 Options vested and expected to vest 633,925 ​ ​ 26.48 6.10 ​ ​ 1,438 ​ Stock option expense is a component of salaries and benefits in the consolidated statements of operations and totaled $208 thousand and $47 thousand for the three months ended March 31, 2020 and 2019, respectively. At March 31, 2020, there was $0.6 million of total unrecognized compensation cost related to non-vested stock options granted under the plans. The cost is expected to be recognized over a weighted average period of 1.8 years. ​ Restricted stock awards ​ The Company issues time-based restricted stock awards that vest over a range of a 1 - 3 year period. Restricted stock with time-based vesting was valued at the fair value of the shares on the date of grant as they are assumed to be held beyond the vesting period. ​ Performance stock units ​ The Company grants performance stock units which represent initial target awards and do not reflect potential increases or decreases resulting from the final performance results, which are to be determined at the end of the three-year performance period (vesting date). The actual number of shares to be awarded at the end of the performance period will range from 0% - 150% of the initial target awards. 60% of the award is based on the Company’s cumulative earnings per share (EPS target) during the performance period, and 40% of the award is based on the Company’s cumulative total shareholder return (TSR target), or TSR, during the performance period. On the vesting date, the Company’s TSR will be compared to the respective TSRs of the companies comprising the KBW Regional Index at the grant date to determine the shares awarded. The fair value of the EPS target portion of the award was determined based on the closing stock price of the Company’s common stock on the grant date. The fair value of the TSR target portion of the award was determined using a Monte Carlo Simulation at the grant date. ​ The following table summarizes restricted stock and performance stock unit activity during the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ Weighted ​ ​ Restricted ​ average grant- ​ Performance ​ ​ average grant- ​ ​ stock shares ​ date fair value ​ stock units ​ ​ date fair value Unvested at December 31, 2019 ​ 122,198 ​ $ 34.19 ​ 158,874 ​ $ 31.19 Granted ​ — ​ ​ — ​ — ​ ​ — Adjustment due to performance ​ — ​ ​ — ​ 17,852 ​ ​ 33.22 Vested ​ — ​ ​ — ​ (53,540) ​ ​ 33.22 Forfeited ​ (1,575) ​ ​ 34.07 ​ (328) ​ ​ 30.38 Unvested at March 31, 2020 ​ 120,623 ​ $ 34.19 ​ 122,858 ​ $ 30.61 ​ As of March 31, 2020, the total unrecognized compensation cost related to the non-vested restricted stock awards and performance stock units totaled $1.4 million and $2.2 million, respectively, and is expected to be recognized over a weighted average period of approximately 1.8 years and 1.5 years, respectively. Expense related to non-vested restricted stock awards totaled $0.5 million and $0.2 million during the three months ended March 31, 2020 and 2019, respectively. Expense related to non-vested performance stock units totaled $0.5 million and $0.2 million during the three months ended March 31, 2020 and 2019, respectively. Expense related to non-vested restricted stock awards and units is a component of salaries and benefits in the Company’s consolidated statements of operations. ​ Employee Stock Purchase Plan ​ The 2014 Employee Stock Purchase Plan (“ESPP”) is intended to be a qualified plan within the meaning of Section 423 of the Internal Revenue Code of 1986 and allows eligible employees to purchase shares of common stock through payroll deductions up to a limit of $25,000 per calendar year and 2,000 shares per offering period. The price an employee pays for shares is 90.0% of the fair market value of Company common stock on the last day of the offering period. The offering periods are the six-month periods commencing on March 1 and September 1 of each year and ending on August 31 and February 28 (or February 29 in the case of a leap year) of each year. There are no vesting or other restrictions on the stock purchased by employees under the ESPP. Under the ESPP, the total number of shares of common stock reserved for issuance totaled 400,000 shares, of which 317,198 was available for issuance. ​ Under the ESPP, employees purchased 8,890 shares and 6,201 shares during the three months ended March 31, 2020 and 2019, respectively.

Common Stock

Common Stock	3 Months Ended
	Mar. 31, 2020
Common Stock
Common Stock	Note 12 Common Stock ​ The Company had 30,483,361 and 31,176,627 shares of Class A common stock outstanding at March 31, 2020 and December 31, 2019, respectively. Additionally, the Company had 120,623 and 122,198 shares outstanding at March 31, 2020 and December 31, 2019, respectively, of restricted Class A common stock issued but not yet vested under the 2014 Plan that are not included in shares outstanding until such time that they are vested; however, these shares do have voting and certain dividend rights during the vesting period. ​ On February 26, 2020, the Board of Directors authorized a new share repurchase program for up to $50.0 million from time to time in either the open market or through privately negotiated transactions. During the first quarter of 2020, the Company repurchased 734,117 shares for $19.5 million. Of those repurchases, $12.6 million were part of the previous authorization from August 2016. That authorization has been completed. The remaining authorization under the new program as of March 31, 2020 was $43.1 million.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2020
Earnings Per Share
Earnings Per Share	Note 13 Earnings Per Share ​ The Company calculates earnings per share under the two-class method, as certain non-vested share awards contain non-forfeitable rights to dividends. As such, these awards are considered securities that participate in the earnings of the Company. Non-vested shares are discussed further in note 12. ​ The Company had 30,483,361 and 30,958,581 ​ The following table illustrates the computation of basic and diluted earnings per share for the three months ended March 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ March 31, 2020 March 31, 2019 Net income ​ $ 15,824 ​ $ 18,922 Less: income allocated to participating securities ​ (24) ​ (18) Income allocated to common shareholders ​ $ 15,800 ​ $ 18,904 Weighted average shares outstanding for basic earnings per common share ​ 31,157,476 ​ 30,961,187 Dilutive effect of equity awards ​ 203,820 ​ 536,351 Weighted average shares outstanding for diluted earnings per common share ​ 31,361,296 ​ 31,497,538 Basic earnings per share ​ $ 0.51 ​ $ 0.61 Diluted earnings per share ​ ​ 0.50 ​ ​ 0.60 ​ The Company had 652,309 and 1,110,984 outstanding stock options to purchase common stock at weighted average exercise prices of $26.69 and $22.28 per share at March 31, 2020 and 2019, respectively, which have time-vesting criteria, and as such, any dilution is derived only for the time frame in which the vesting criteria had been met and where the inclusion of those stock options is dilutive. The Company had 243,481 and 207,372 unvested restricted shares and units issued as of March 31, 2020 and 2019, respectively, which have performance, market and/or time-vesting criteria, and as such, any dilution is derived only for the time frame in which the vesting criteria had been met and where the inclusion of those restricted shares and units is dilutive.

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2020
Derivatives
Derivatives	Note 14 Derivatives ​ Risk management objective of using derivatives ​ The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company has established policies that neither carrying value nor fair value at risk should exceed established guidelines. The Company has designed strategies to confine these risks within the established limits and identify appropriate trade-offs in the financial structure of its balance sheet. These strategies include the use of derivative financial instruments to help achieve the desired balance sheet repricing structure while meeting the desired objectives of its clients. Currently, the Company employs certain interest rate swaps that are designated as fair value hedges as well as economic hedges. The Company manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions. ​ Fair values of derivative instruments on the balance sheet ​ The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the consolidated statements of financial condition as of March 31, 2020 and December 31, 2019. ​ Information about the valuation methods used to measure fair value is provided in note 16. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Asset derivatives fair value ​ ​ ​ Liability derivatives fair value ​ ​ Balance Sheet ​ March 31, ​ December 31, ​ Balance Sheet ​ March 31, ​ December 31, ​ location 2020 2019 Location 2020 2019 Derivatives designated as hedging instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate products Other assets ​ $ — ​ $ 1,171 Other liabilities ​ $ 46,573 ​ $ 13,537 Total derivatives designated as hedging instruments ​ ​ ​ $ — ​ $ 1,171 ​ ​ ​ $ 46,573 ​ $ 13,537 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not designated as hedging instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate products Other assets ​ $ 21,853 ​ $ 9,004 Other liabilities ​ $ 21,894 ​ $ 9,021 Interest rate lock commitments ​ Other assets ​ ​ 6,737 ​ ​ 1,499 ​ Other liabilities ​ ​ 166 ​ ​ 141 Forward contracts ​ Other assets ​ ​ 45 ​ ​ 16 ​ Other liabilities ​ ​ 6,035 ​ ​ 299 Total derivatives not designated as hedging instruments ​ ​ ​ $ 28,635 ​ $ 10,519 ​ ​ ​ $ 28,095 ​ $ 9,461 ​ Fair value hedges ​ Interest rate swaps designated as fair value hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. As of March 31, 2020, the Company had interest rate swaps with a notional amount of $410.3 million, which were designated as fair value hedges of interest rate risk. As of December 31, 2019, the Company had interest rate swaps with a notional amount of $403.7 million that were designated as fair value hedges. These interest rate swaps were associated with $413.4 million and $405.9 million of the Company’s fixed-rate loans as of March 31, 2020 and December 31, 2019, respectively, before a gain of $47.6 million and $13.9 million from the fair value hedge adjustment in the carrying amount, included in loans receivable on the statements of financial condition as of March 31, 2020 and December 31, 2019, respectively. ​ For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in earnings. The Company includes the gain or loss on the hedged items in the same line item as the offsetting loss or gain on the related derivatives. ​ Non-designated hedges ​ Derivatives not designated as hedges are not speculative and consist of interest rate swaps with commercial banking clients that facilitate their respective risk management strategies. Interest rate swaps are simultaneously hedged by offsetting interest rate swaps that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the client swaps and the offsetting swaps are recognized directly in earnings. As of March 31, 2020, the Company had matched interest rate swap transactions with an aggregate notional amount of $517.0 million related to this program. As of December 31, 2019, the Company had matched interest rate swap transactions with an aggregate notional amount of $478.9 million related to this program. ​ As part of its mortgage banking activities, the Company enters into interest rate lock commitments, which are commitments to originate loans where the interest rate on the loan is determined prior to funding and the clients have locked into that interest rate. The Company then locks in the loan and interest rate with an investor and commits to deliver the loan if settlement occurs ("best efforts") or commits to deliver the locked loan in a binding ("mandatory") delivery program with an investor. Fair value changes of certain loans under interest rate lock commitments are hedged with forward sales contracts of MBS. Forward sales contracts of MBS are recorded at fair value with changes in fair value recorded in non-interest income. Interest rate lock commitments and commitments to deliver loans to investors are considered derivatives. The market value of interest rate lock commitments and best efforts contracts are not readily ascertainable with precision because they are not actively traded in stand-alone markets. The Company determines the fair value of interest rate lock commitments and delivery contracts by measuring the fair value of the underlying assets. The fair value of the underlying assets is impacted by current interest rates, remaining origination fees, costs of production to be incurred and the probability that the interest rate lock commitments will close or will be funded. ​ Certain additional risks arise from these forward delivery contracts in that the counterparties to the contracts may not be able to meet the terms of the contracts. The Company does not expect any counterparty to any MBS contract to fail to meet its obligation. Additional risks inherent in mandatory delivery programs include the risk that, if the Company fails to deliver the loans subject to interest rate risk lock commitments, it will still be obligated to “pair off” MBS to the counterparty. Should this be required, the Company could incur significant costs in acquiring replacement loans and such costs could have an adverse effect on the consolidated financial statements. ​ The fair value of the mortgage banking derivative is recorded as a freestanding asset or liability with the change in value being ​ The Company had interest rate lock commitments with a notional value of $325.4 million and forward contracts with a notional value of $287.5 million at March 31, 2020. At December 31, 2019, the Company had interest rate lock commitments with a notional value of $99.8 million and forward contracts with a notional value of $181.5 million. ​ Effect of derivative instruments on the consolidated statements of operations ​ The tables below present the effect of the Company’s derivative financial instruments in the consolidated statements of operations for the three months ended March 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of gain (loss) ​ Amount of (loss) gain recognized in income on derivatives Derivatives in fair value ​ recognized in income on ​ For the three months ended March 31, hedging relationships derivatives 2020 2019 Interest rate products Interest and fees on loans ​ $ (34,770) ​ $ 10,136 Total ​ ​ ​ $ (34,770) ​ $ 10,136 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of gain (loss) ​ Amount of gain (loss) recognized in income on hedged items ​ ​ recognized in income on ​ For the three months ended March 31, Hedged items hedged items 2020 2019 Interest rate products Interest and fees on loans ​ $ 33,778 $ (10,515) Total ​ ​ ​ $ 33,778 $ (10,515) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of gain (loss) ​ Amount of gain (loss) recognized in income on derivatives Derivatives not designated ​ recognized in income on ​ For the three months ended March 31, as hedging instruments derivatives 2020 2019 Interest rate products Other non-interest expense $ (23) $ 273 Interest rate lock commitments ​ Mortgage banking income ​ ​ 7,503 ​ ​ 1,152 Forward contracts ​ Mortgage banking income ​ ​ (5,707) ​ ​ (800) Total ​ ​ $ 1,773 $ 625 ​ Credit-risk-related contingent features ​ The Company has agreements with its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness for reasons other than an error or omission of an administrative or operational nature, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. ​ The Company also has agreements with certain of its derivative counterparties that contain a provision where if the Company fails to maintain its status as a well/adequately capitalized institution, then the counterparty has the right to terminate the derivative positions and the Company would be required to settle its obligations under the agreements. ​ As of March 31, 2020, the termination value of derivatives in a net liability position related to these agreements was $70.6 million, which includes accrued interest but excludes any adjustment for nonperformance risk. The Company has minimum collateral posting thresholds with certain of its derivative counterparties, and as of March 31, 2020, the Company had posted $77.4 million in eligible collateral. If the Company had breached any of these provisions at March 31, 2020, it could have been required to settle its obligations under the agreements at the termination value.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies
Commitments and Contingencies	Note 15 Commitments and Contingencies ​ In the normal course of business, the Company enters into various off-balance sheet commitments to help meet the financing needs of clients. These financial instruments include commitments to extend credit, commercial and consumer lines of credit and standby letters of credit. The same credit policies are applied to these commitments as the loans on the consolidated statements of financial condition; however, these commitments involve varying degrees of credit risk in excess of the amount recognized in the consolidated statements of financial condition. The total amounts of unused commitments do not necessarily represent future credit exposure or cash requirements, as commitments often expire without being drawn upon. However, the contractual amount of these commitments, offset by any additional collateral pledged, represents the Company’s potential credit loss exposure. ​ Total unfunded commitments at March 31, 2020 and December 31, 2019 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 Commitments to fund loans ​ $ 305,931 ​ $ 249,914 Unfunded commitments under lines of credit ​ 510,529 ​ 600,407 Commercial and standby letters of credit ​ 10,478 ​ 11,929 Total unfunded commitments ​ $ 826,938 ​ $ 862,250 ​ Commitments to fund loans ​ Unfunded commitments under lines of credit ​ Commercial and standby letters of credit ​ Contingencies ​ Mortgage loans sold to investors may be subject to repurchase or indemnification in the event of specific default by the borrower or subsequent discovery that underwriting standards were not met. The Company established a reserve liability for expected losses related to these representations and warranties based upon management’s evaluation of actual and historic loss history, delinquency trends in the portfolio and economic conditions. The Company recorded a repurchase reserve of $2.8 million and $2.6 million at March 31, 2020 and December 31, 2019, respectively, which is included in other liabilities on the consolidated statements of financial condition. ​ In the ordinary course of business, the Company and the Bank may be subject to litigation. Based upon the available information and advice from the Company’s legal counsel, management does not believe that any potential, threatened or pending litigation to which it is a party will have a material adverse effect on the Company’s liquidity, financial condition or results of operations.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 16 Fair Value Measurements ​ The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to disclose the fair value of its financial instruments. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. For disclosure purposes, the Company groups its financial and non-financial assets and liabilities into three different levels based on the nature of the instrument and the availability and reliability of the information that is used to determine fair value. The three levels are defined as follows: ​ ● Level 1—Includes assets or liabilities in which the valuation methodologies are based on unadjusted quoted prices in active markets for identical assets or liabilities. ● Level 2—Includes assets or liabilities in which the inputs to the valuation methodologies are based on similar assets or liabilities in inactive markets, quoted prices for identical or similar assets or liabilities in inactive markets, and inputs other than quoted prices that are observable, such as interest rates, yield curves, volatilities, prepayment speeds, and other inputs obtained from observable market input. ● Level 3—Includes assets or liabilities in which the inputs to the valuation methodology are based on at least one significant assumption that is not observable in the marketplace. These valuations may rely on management’s judgment and may include internally-developed model-based valuation techniques. ​ Level 1 inputs are considered to be the most transparent and reliable and level 3 inputs are considered to be the least transparent and reliable. The Company assumes the use of the principal market to conduct a transaction of each particular asset or liability being measured and then considers the assumptions that market participants would use when pricing the asset or liability. Whenever possible, the Company first looks for quoted prices for identical assets or liabilities in active markets (level 1 inputs) to value each asset or liability. However, when inputs from identical assets or liabilities on active markets are not available, the Company utilizes market observable data for similar assets and liabilities. The Company maximizes the use of observable inputs and limits the use of unobservable inputs to occasions when observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity of the actual financial instrument or of the underlying collateral. While third party price indications may be available in those cases, limited trading activity can challenge the observability of those inputs. ​ Changes in the valuation inputs used for measuring the fair value of financial instruments may occur due to changes in current market conditions or other factors. Such changes may necessitate a transfer of the financial instruments to another level in the hierarchy based on the new inputs used. The Company recognizes these transfers at the end of the reporting period that the transfer occurs. During the three months ended March 31, 2020 and 2019, there were no transfers of financial instruments between the hierarchy levels. ​ The following is a description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of each instrument under the valuation hierarchy: ​ Fair Value of Financial Instruments Measured on a Recurring Basis ​ Investment securities available-for-sale ​ Loans held for sale ​ Interest rate swap derivatives ​ Mortgage banking derivatives valuation model to estimate the fair value of its forward commitments to sell residential mortgage loans (i.e., an estimate of what the Company would receive or pay to terminate the forward delivery contract based on market prices for similar financial instruments), which includes matching specific terms and maturities of the forward commitments against applicable investor pricing. ​ The tables below present the financial instruments measured at fair value on a recurring basis as of March 31, 2020 and December 31, 2019 on the consolidated statements of financial condition utilizing the hierarchy structure described above: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Level 1 ​ Level 2 ​ Level 3 ​ Total Assets: ​ ​ ​ ​ Investment securities available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ — ​ $ 88,549 ​ $ — ​ $ 88,549 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ — ​ 539,875 ​ — ​ 539,875 Municipal securities ​ ​ — ​ ​ 388 ​ ​ — ​ ​ 388 Loans held for sale ​ — ​ 127,439 ​ — ​ 127,439 Interest rate swap derivatives ​ — ​ 21,853 ​ — ​ 21,853 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 6,782 ​ ​ 6,782 Total assets at fair value ​ $ — ​ $ 778,104 ​ $ 6,782 ​ $ 784,886 Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap derivatives ​ $ — ​ $ 68,467 ​ $ — ​ $ 68,467 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 6,201 ​ ​ 6,201 Total liabilities at fair value ​ $ — ​ $ 68,467 ​ $ 6,201 ​ $ 74,668 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Level 1 Level 2 Level 3 Total Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ — ​ $ 95,256 ​ $ — ​ $ 95,256 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ — ​ 542,037 ​ — ​ 542,037 Municipal securities ​ ​ — ​ ​ 372 ​ ​ — ​ ​ 372 Loans held for sale ​ — ​ 117,444 ​ — ​ 117,444 Interest rate swap derivatives ​ — ​ 10,175 ​ — ​ 10,175 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 1,515 ​ ​ 1,515 Total assets at fair value ​ $ — ​ $ 765,284 ​ $ 1,515 ​ $ 766,799 Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap derivatives ​ $ — ​ $ 22,558 ​ $ — ​ $ 22,558 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 440 ​ ​ 440 Total liabilities at fair value ​ $ — ​ $ 22,558 ​ $ 440 ​ $ 22,998 ​ The table below details the changes in level 3 financial instruments during the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ Mortgage banking ​ ​ ​ derivatives, net Balance at December 31, 2019 ​ $ 1,075 Gain included in earnings, net ​ ​ 1,796 Fees and costs included in earnings, net ​ (2,290) Balance at March 31, 2020 ​ $ 581 ​ Fair Value of Financial Instruments Measured on a Non-recurring Basis ​ Certain assets may be recorded at fair value on a non-recurring basis as conditions warrant. These non-recurring fair value measurements typically result from the application of lower of cost or fair value accounting or a write-down occurring during the period. ​ Individually evaluated loans ​ OREO ​ Mortgage servicing rights MSRs ​ The Company may be required to record fair value adjustments on other available-for-sale and municipal securities valued at par on a non-recurring basis. ​ The tables below provide information regarding the assets recorded at fair value on a non-recurring basis during the three months ended March 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Total ​ Losses from fair value changes Individually evaluated loans ​ $ 35,935 ​ $ 497 Mortgage servicing rights ​ 2,053 ​ 509 Total ​ $ 37,988 ​ $ 1,006 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2019 ​ ​ Total ​ Losses from fair value changes Individually evaluated loans ​ $ 32,743 ​ $ 245 Other real estate owned ​ 9,394 ​ 596 Mortgage servicing rights ​ ​ 3,362 ​ ​ 54 Total ​ $ 45,499 ​ $ 895 ​ The Company did not record any liabilities measured at fair value on a non-recurring basis during the three months ended March 31, 2020 and 2019.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 17 Fair Value of Financial Instruments ​ The fair value of a financial instrument is the amount that would be exchanged between willing parties, other than in a forced liquidation. Fair value is determined based upon quoted market prices to the extent possible; however, in many instances, there are no quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques that may be significantly impacted by the assumptions used, including the discount rate and estimates of future cash flows. Changes in any of these assumptions could significantly affect the fair value estimates. The fair value of the financial instruments listed below does not reflect a premium or discount that could result from offering all of the Company’s holdings of financial instruments at one time, nor does it reflect the underlying value of the Company, as ASC Topic 825 excludes certain financial instruments and all non-financial instruments from its disclosure requirements. The estimated fair value amounts have been determined by the Company using available market information and appropriate valuation methodologies and are based on the exit price concept within ASC Topic 825 and applied to this disclosure on a prospective basis. Considerable judgment is required to interpret market data in order to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. ​ The fair value of financial instruments at March 31, 2020 and December 31, 2019, including methods and assumptions utilized for determining fair value of financial instruments, are set forth below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level in fair value March 31, 2020 December 31, 2019 ​ ​ measurement ​ Carrying ​ Estimated ​ Carrying ​ Estimated ​ ​ hierarchy ​ amount fair value amount fair value ASSETS ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents Level 1 ​ $ 133,926 ​ $ 133,926 ​ $ 110,190 ​ $ 110,190 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 ​ 88,549 ​ 88,549 ​ 95,256 ​ 95,256 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 ​ 539,875 ​ 539,875 ​ 542,037 ​ 542,037 Municipal securities available-for-sale ​ Level 2 ​ ​ 388 ​ ​ 388 ​ ​ 372 ​ ​ 372 Municipal securities available-for-sale ​ Level 3 ​ ​ 115 ​ ​ 115 ​ ​ 115 ​ ​ 115 Other available-for-sale securities Level 3 ​ 469 ​ 469 ​ 469 ​ 469 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 ​ 144,218 ​ 148,283 ​ 127,560 ​ 128,770 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 ​ 48,684 ​ 49,314 ​ 55,324 ​ 54,971 Non-marketable securities ​ Level 2 ​ ​ 29,948 ​ ​ 29,948 ​ ​ 29,751 ​ ​ 29,751 Loans receivable Level 3 ​ 4,505,735 ​ 4,719,261 ​ 4,415,406 ​ 4,481,209 Loans held for sale Level 2 ​ 127,439 ​ 127,439 ​ 117,444 ​ 117,444 Accrued interest receivable Level 2 ​ 22,028 ​ 22,028 ​ 19,157 ​ 19,157 Interest rate swap derivatives Level 2 ​ 21,853 ​ 21,853 ​ 10,175 ​ 10,175 Mortgage banking derivatives ​ Level 3 ​ ​ 6,782 ​ ​ 6,782 ​ ​ 1,515 ​ ​ 1,515 LIABILITIES ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposit transaction accounts Level 2 ​ 3,690,875 ​ 3,690,875 ​ 3,678,979 ​ 3,678,979 Time deposits Level 2 ​ 1,050,981 ​ 1,059,344 ​ 1,058,153 ​ 1,058,354 Securities sold under agreements to repurchase Level 2 ​ 23,703 ​ 23,703 ​ 56,935 ​ 56,935 Federal Home Loan Bank advances Level 2 ​ 341,506 ​ 341,650 ​ 207,675 ​ 207,890 Accrued interest payable Level 2 ​ 9,562 ​ 9,562 ​ 9,328 ​ 9,328 Interest rate swap derivatives ​ Level 2 ​ ​ 68,467 ​ ​ 68,467 ​ 22,558 ​ 22,558 Mortgage banking derivatives Level 3 ​ 6,201 ​ 6,201 ​ ​ 440 ​ ​ 440 ​

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities	Available-for-sale securities are summarized as follows as of the dates indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ Amortized Gross Gross ​ ​ ​ ​ cost ​ unrealized gains ​ unrealized losses ​ Fair value Mortgage-backed securities (“MBS”): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 85,972 ​ $ 2,577 ​ $ — ​ $ 88,549 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 528,397 ​ 11,588 ​ (110) ​ 539,875 Municipal securities ​ ​ 495 ​ ​ 8 ​ ​ — ​ ​ 503 Other securities ​ 469 ​ — ​ — ​ 469 Total investment securities available-for-sale ​ $ 615,333 ​ $ 14,173 ​ $ (110) ​ $ 629,396 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Amortized Gross Gross ​ ​ ​ ​ cost ​ unrealized gains ​ unrealized losses ​ Fair value Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 93,770 ​ $ 1,497 ​ $ (11) ​ $ 95,256 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 543,275 ​ 3,818 ​ (5,056) ​ 542,037 Municipal securities ​ ​ 495 ​ ​ — ​ ​ (8) ​ ​ 487 Other securities ​ 469 ​ — ​ — ​ 469 Total investment securities available-for-sale ​ $ 638,009 ​ $ 5,315 ​ $ (5,075) ​ $ 638,249
Summary of unrealized losses for available-for-sale securities	The tables below summarize the available-for-sale securities with unrealized losses as of the dates shown, along with the length of the impairment period: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ value ​ losses ​ value ​ losses ​ value ​ losses Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ ​ 6,257 ​ ​ (3) ​ ​ 7,007 ​ ​ (107) ​ ​ 13,264 ​ ​ (110) Total ​ $ 6,257 ​ $ (3) ​ $ 7,007 ​ $ (107) ​ $ 13,264 ​ $ (110) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ value ​ losses ​ value ​ losses ​ value ​ losses Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 10,413 ​ $ (7) ​ $ 1,421 ​ $ (4) ​ $ 11,834 ​ $ (11) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 41,983 ​ ​ (281) ​ 254,380 ​ (4,775) ​ 296,363 ​ ​ (5,056) Municipal securities ​ ​ — ​ ​ — ​ ​ 372 ​ ​ (8) ​ ​ 372 ​ ​ (8) Total ​ $ 52,396 ​ $ (288) ​ $ 256,173 ​ $ (4,787) ​ $ 308,569 ​ $ (5,075) ​
Held-to-maturity Securities	Held-to-maturity investment securities are summarized as follows as of the dates indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ ​ ​ ​ ​ cost ​ gains ​ losses ​ Fair value Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 144,218 ​ $ 4,065 ​ $ — ​ $ 148,283 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 48,684 ​ 630 ​ — ​ 49,314 Total investment securities held-to-maturity ​ $ 192,902 ​ $ 4,695 ​ $ — ​ $ 197,597 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ ​ ​ ​ ​ cost ​ gains ​ losses ​ Fair value Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 127,560 ​ $ 1,239 ​ $ (29) ​ $ 128,770 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 55,324 ​ 82 ​ (435) ​ 54,971 Total investment securities held-to-maturity ​ $ 182,884 ​ $ 1,321 ​ $ (464) ​ $ 183,741
Summary of unrealized losses for held-to-maturity securities	There were no held-to-maturity securities in an unrealized loss position as of March 31, 2020 compared to 13 securities at December 31, 2019. The table below summarizes the held-to-maturity securities with unrealized losses as of December 31, 2019, along with the length of the impairment period: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ Fair Unrealized Fair Unrealized Fair Unrealized ​ ​ value ​ losses ​ value ​ losses ​ value ​ losses Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ 10,478 ​ $ (26) ​ $ 338 ​ $ (3) ​ $ 10,816 ​ $ (29) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ 3,925 ​ ​ (9) ​ ​ 28,554 ​ ​ (426) ​ 32,479 ​ ​ (435) Total ​ $ 14,403 ​ $ (35) ​ $ 28,892 ​ $ (429) ​ $ 43,295 ​ $ (464)

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Loan Portfolio Composition Including Carrying Value by Segment of Originated and Acquired Loans Accounted for under ASC Topic 310-30 and Loans Covered by the FDIC Loss Sharing Agreements	The tables below show the loan portfolio composition including carrying value by segment as of the dates shown. The carrying value of loans is net of discounts, fees, cost and fair value marks of $19.0 million and $21.9 million as of March 31, 2020 and December 31, 2019, respectively. ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ Total loans % of total Commercial $ 3,074,096 ​ 68.2% Commercial real estate non-owner occupied 643,727 ​ 14.3% Residential real estate 766,324 ​ 17.0% Consumer 21,588 ​ 0.5% Total $ 4,505,735 ​ 100.0% ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Total loans % of total Commercial $ 2,992,307 ​ 67.8% Commercial real estate non-owner occupied 630,906 ​ 14.3% Residential real estate 770,417 ​ 17.4% Consumer 21,776 ​ 0.5% Total $ 4,415,406 ​ 100.0%
Past Due Financing Receivables	Delinquency for loans is shown in the following tables at March 31, 2020 and December 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-89 days ​ than 90 days ​ ​ ​ Total past ​ ​ ​ ​ ​ ​ past due and ​ past due and ​ Non-accrual ​ due and ​ ​ ​ ​ ​ ​ accruing ​ accruing ​ loans ​ non-accrual ​ Current ​ Total loans Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ $ 4,603 ​ $ 714 ​ $ 8,920 ​ $ 14,237 ​ $ 1,424,313 ​ $ 1,438,550 Municipal and non-profit ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 877,084 ​ ​ 877,084 Owner occupied commercial real estate ​ ​ 1,085 ​ ​ 163 ​ ​ 2,314 ​ ​ 3,562 ​ ​ 512,352 ​ ​ 515,914 Food and agribusiness ​ ​ 317 ​ ​ — ​ ​ 735 ​ ​ 1,052 ​ ​ 241,496 ​ ​ 242,548 Total commercial ​ ​ 6,005 ​ ​ 877 ​ ​ 11,969 ​ ​ 18,851 ​ ​ 3,055,245 ​ ​ 3,074,096 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ — ​ — ​ — ​ — ​ 86,123 ​ 86,123 Acquisition/development ​ 60 ​ — ​ 261 ​ 321 ​ 26,982 ​ 27,303 Multifamily ​ — ​ — ​ — ​ — ​ 77,336 ​ 77,336 Non-owner occupied ​ 1,451 ​ — ​ 39 ​ 1,490 ​ 451,475 ​ 452,965 Total commercial real estate ​ 1,511 ​ — ​ 300 ​ 1,811 ​ 641,916 ​ 643,727 Residential real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior lien ​ ​ 2,640 ​ ​ 487 ​ ​ 8,257 ​ ​ 11,384 ​ ​ 663,270 ​ ​ 674,654 Junior lien ​ 483 ​ ​ — ​ ​ 763 ​ 1,246 ​ 90,424 ​ ​ 91,670 Total residential real estate ​ 3,123 ​ ​ 487 ​ ​ 9,020 ​ ​ 12,630 ​ ​ 753,694 ​ ​ 766,324 Consumer ​ 54 ​ — ​ 38 ​ 92 ​ 21,496 ​ 21,588 Total loans ​ $ 10,693 ​ $ 1,364 ​ $ 21,327 ​ $ 33,384 ​ $ 4,472,351 ​ $ 4,505,735 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ Non-accrual loans ​ Non-accrual loans ​ ​ ​ ​ with a related ​ with no related ​ ​ ​ ​ allowance for ​ allowance for ​ Non-accrual ​ credit loss ​ credit loss ​ loans Commercial: ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial $ 6,081 ​ $ 2,839 ​ $ 8,920 Municipal and non-profit ​ — ​ ​ — ​ ​ — Owner occupied commercial real estate ​ 805 ​ ​ 1,509 ​ ​ 2,314 Food and agribusiness ​ 313 ​ ​ 422 ​ ​ 735 Total commercial ​ 7,199 ​ ​ 4,770 ​ ​ 11,969 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ Construction — ​ — ​ — Acquisition/development 3 ​ 258 ​ 261 Multifamily — ​ — ​ — Non-owner occupied 39 ​ — ​ 39 Total commercial real estate 42 ​ 258 ​ 300 Residential real estate: ​ ​ ​ ​ ​ Senior lien ​ 4,778 ​ ​ 3,479 ​ ​ 8,257 Junior lien ​ 763 ​ ​ — ​ 763 Total residential real estate ​ 5,541 ​ ​ 3,479 ​ 9,020 Consumer 38 ​ — ​ 38 Total loans $ 12,820 ​ $ 8,507 ​ $ 21,327 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-89 days ​ than 90 days ​ ​ ​ Total past ​ ​ ​ ​ ​ ​ past due and ​ past due and ​ Non-accrual ​ due and ​ ​ ​ ​ ​ ​ accruing ​ accruing ​ loans ​ non-accrual ​ Current ​ Total loans Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ $ 2,252 ​ $ 879 ​ $ 10,330 ​ $ 13,461 ​ $ 1,398,070 ​ $ 1,411,531 Municipal and non-profit ​ ​ 226 ​ ​ — ​ ​ — ​ ​ 226 ​ ​ 837,300 ​ ​ 837,526 Owner occupied commercial real estate ​ 595 ​ 630 ​ ​ 2,264 ​ 3,489 ​ 486,633 ​ 490,122 Food and agribusiness ​ 190 ​ — ​ ​ 317 ​ 507 ​ 252,621 ​ 253,128 Total commercial ​ ​ 3,263 ​ ​ 1,509 ​ ​ 12,911 ​ ​ 17,683 ​ ​ 2,974,624 ​ ​ 2,992,307 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ — ​ — ​ — ​ — ​ 77,733 ​ 77,733 Acquisition/development ​ 187 ​ — ​ 416 ​ 603 ​ 26,276 ​ 26,879 Multifamily ​ — ​ — ​ — ​ — ​ 55,808 ​ 55,808 Non-owner occupied ​ 438 ​ 65 ​ 43 ​ 546 ​ 469,940 ​ 470,486 Total commercial real estate ​ 625 ​ 65 ​ 459 ​ 1,149 ​ 629,757 ​ 630,906 Residential real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior lien ​ 2,101 ​ 9 ​ ​ 7,597 ​ 9,707 ​ 668,955 ​ ​ 678,662 Junior lien ​ 245 ​ 79 ​ ​ 731 ​ ​ 1,055 ​ ​ 90,700 ​ ​ 91,755 Total residential real estate ​ 2,346 ​ 88 ​ ​ 8,328 ​ ​ 10,762 ​ ​ 759,655 ​ ​ 770,417 Consumer ​ 116 ​ — ​ 50 ​ ​ 166 ​ ​ 21,610 ​ ​ 21,776 Total loans ​ $ 6,350 ​ $ 1,662 ​ $ 21,748 ​ $ 29,760 ​ $ 4,385,646 ​ $ 4,415,406
Credit Exposure for Loans as Determined by Company's Internal Risk Rating System	The amortized cost basis for all loans as determined by the Company’s internal risk rating system and year of origination was as follows at March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ loans ​ loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ amortized ​ converted ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ cost basis ​ to term ​ Total Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 77,093 ​ $ 263,719 ​ $ 237,591 ​ $ 107,183 ​ $ 37,660 ​ $ 40,127 ​ $ 629,234 ​ $ 11,476 ​ $ 1,404,083 Special mention ​ ​ — ​ ​ 968 ​ ​ 5,910 ​ ​ 279 ​ ​ 5,813 ​ ​ 1,226 ​ ​ 5,115 ​ ​ — ​ ​ 19,311 Substandard ​ ​ — ​ ​ 1,395 ​ ​ 1,091 ​ ​ 3,106 ​ ​ 399 ​ ​ 4,710 ​ ​ 3,314 ​ ​ — ​ ​ 14,015 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ 431 ​ ​ — ​ ​ 674 ​ ​ 36 ​ ​ — ​ ​ 1,141 Total commercial and industrial ​ ​ 77,093 ​ ​ 266,082 ​ ​ 244,592 ​ ​ 110,999 ​ ​ 43,872 ​ ​ 46,737 ​ ​ 637,699 ​ ​ 11,476 ​ ​ 1,438,550 Municipal and non-profit: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 61,222 ​ ​ 98,498 ​ ​ 142,299 ​ ​ 173,711 ​ ​ 136,171 ​ ​ 261,847 ​ ​ 3,336 ​ ​ — ​ ​ 877,084 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total municipal and non-profit ​ ​ 61,222 ​ ​ 98,498 ​ ​ 142,299 ​ ​ 173,711 ​ ​ 136,171 ​ ​ 261,847 ​ ​ 3,336 ​ ​ — ​ ​ 877,084 Owner occupied commercial real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 35,696 ​ ​ 121,398 ​ ​ 99,248 ​ ​ 51,857 ​ ​ 42,753 ​ ​ 112,635 ​ ​ 1,919 ​ ​ 638 ​ ​ 466,144 Special mention ​ ​ — ​ ​ — ​ ​ 4,775 ​ ​ 11,565 ​ ​ 5,687 ​ ​ 17,558 ​ ​ — ​ ​ — ​ ​ 39,585 Substandard ​ ​ — ​ ​ — ​ ​ 3,965 ​ ​ — ​ ​ — ​ ​ 6,220 ​ ​ — ​ ​ — ​ ​ 10,185 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total owner occupied commercial real estate ​ ​ 35,696 ​ ​ 121,398 ​ ​ 107,988 ​ ​ 63,422 ​ ​ 48,440 ​ ​ 136,413 ​ ​ 1,919 ​ ​ 638 ​ ​ 515,914 Food and agribusiness: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 5,778 ​ ​ 11,194 ​ ​ 35,979 ​ ​ 7,858 ​ ​ 10,637 ​ ​ 30,853 ​ ​ 137,246 ​ ​ 409 ​ ​ 239,954 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 926 ​ ​ — ​ ​ — ​ ​ 926 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ 319 ​ ​ — ​ ​ 1,086 ​ ​ 231 ​ ​ — ​ ​ 1,636 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ 26 ​ ​ — ​ ​ 32 Total food and agribusiness ​ ​ 5,778 ​ ​ 11,194 ​ ​ 35,979 ​ ​ 8,177 ​ ​ 10,637 ​ ​ 32,871 ​ ​ 137,503 ​ ​ 409 ​ ​ 242,548 Total commercial ​ ​ 179,789 ​ ​ 497,172 ​ ​ 530,858 ​ ​ 356,309 ​ ​ 239,120 ​ ​ 477,868 ​ ​ 780,457 ​ ​ 12,523 ​ ​ 3,074,096 Commercial real estate non-owner occupied: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 6,573 ​ ​ 32,167 ​ ​ 16,823 ​ ​ 24,059 ​ ​ — ​ ​ — ​ ​ 5,688 ​ ​ 659 ​ ​ 85,969 Special mention ​ ​ 154 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 154 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total construction ​ ​ 6,727 ​ ​ 32,167 ​ ​ 16,823 ​ ​ 24,059 ​ ​ — ​ ​ — ​ ​ 5,688 ​ ​ 659 ​ ​ 86,123 Acquisition/development: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 4,659 ​ ​ 2,424 ​ ​ 2,313 ​ ​ 8,554 ​ ​ 4,598 ​ ​ 4,177 ​ ​ 95 ​ ​ — ​ ​ 26,820 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ 37 ​ ​ — ​ ​ 446 ​ ​ — ​ ​ — ​ ​ 483 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total acquisition/development ​ ​ 4,659 ​ ​ 2,424 ​ ​ 2,313 ​ ​ 8,591 ​ ​ 4,598 ​ ​ 4,623 ​ ​ 95 ​ ​ — ​ ​ 27,303 Multifamily: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 21,468 ​ ​ 13,886 ​ ​ 1,832 ​ ​ 8,387 ​ ​ 21,374 ​ ​ 9,912 ​ ​ — ​ ​ — ​ ​ 76,859 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 5 ​ ​ — ​ ​ — ​ ​ 5 Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 472 ​ ​ — ​ ​ — ​ ​ 472 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total multifamily ​ ​ 21,468 ​ ​ 13,886 ​ ​ 1,832 ​ ​ 8,387 ​ ​ 21,374 ​ ​ 10,389 ​ ​ — ​ ​ — ​ ​ 77,336 Non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 31,400 ​ ​ 92,052 ​ ​ 29,996 ​ ​ 126,447 ​ ​ 34,583 ​ ​ 129,563 ​ ​ 2,125 ​ ​ — ​ ​ 446,166 Special mention ​ ​ — ​ ​ — ​ ​ 4,360 ​ ​ 174 ​ ​ — ​ ​ 1,312 ​ ​ — ​ ​ — ​ ​ 5,846 Substandard ​ ​ — ​ ​ — ​ ​ 66 ​ ​ — ​ ​ — ​ ​ 887 ​ ​ — ​ ​ — ​ ​ 953 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total non-owner occupied ​ ​ 31,400 ​ ​ 92,052 ​ ​ 34,422 ​ ​ 126,621 ​ ​ 34,583 ​ ​ 131,762 ​ ​ 2,125 ​ ​ — ​ ​ 452,965 Total commercial real estate ​ ​ 64,254 ​ ​ 140,529 ​ ​ 55,390 ​ ​ 167,658 ​ ​ 60,555 ​ ​ 146,774 ​ ​ 7,908 ​ ​ 659 ​ ​ 643,727 Residential real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 33,597 ​ ​ 115,680 ​ ​ 61,000 ​ ​ 71,750 ​ ​ 120,014 ​ ​ 234,663 ​ ​ 27,935 ​ ​ 276 ​ ​ 664,915 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 444 ​ ​ 249 ​ ​ — ​ ​ 693 Substandard ​ ​ 102 ​ ​ 373 ​ ​ 32 ​ ​ 1,567 ​ ​ 547 ​ ​ 6,333 ​ ​ — ​ ​ 92 ​ ​ 9,046 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total senior lien ​ ​ 33,699 ​ ​ 116,053 ​ ​ 61,032 ​ ​ 73,317 ​ ​ 120,561 ​ ​ 241,440 ​ ​ 28,184 ​ ​ 368 ​ ​ 674,654 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving ​ Revolving ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ loans ​ loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ amortized ​ converted ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 ​ 2017 ​ 2016 ​ Prior ​ cost basis ​ to term ​ Total Junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 1,327 ​ ​ 6,180 ​ ​ 3,962 ​ ​ 2,251 ​ ​ 1,067 ​ ​ 5,010 ​ ​ 69,799 ​ ​ 828 ​ ​ 90,424 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 21 ​ ​ 344 ​ ​ — ​ ​ 365 Substandard ​ ​ — ​ ​ — ​ ​ 231 ​ ​ 116 ​ ​ 180 ​ ​ 280 ​ ​ 74 ​ ​ — ​ ​ 881 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total junior lien ​ ​ 1,327 ​ ​ 6,180 ​ ​ 4,193 ​ ​ 2,367 ​ ​ 1,247 ​ ​ 5,311 ​ ​ 70,217 ​ ​ 828 ​ ​ 91,670 Total residential real estate ​ ​ 35,026 ​ ​ 122,233 ​ ​ 65,225 ​ ​ 75,684 ​ ​ 121,808 ​ ​ 246,751 ​ ​ 98,401 ​ ​ 1,196 ​ ​ 766,324 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 3,347 ​ ​ 8,797 ​ ​ 2,933 ​ ​ 1,292 ​ ​ 821 ​ ​ 1,077 ​ ​ 3,212 ​ ​ 71 ​ ​ 21,550 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ 26 ​ ​ 11 ​ ​ — ​ ​ — ​ ​ 38 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total consumer ​ ​ 3,347 ​ ​ 8,798 ​ ​ 2,933 ​ ​ 1,292 ​ ​ 847 ​ ​ 1,088 ​ ​ 3,212 ​ ​ 71 ​ ​ 21,588 Total loans ​ $ 282,416 ​ $ 768,732 ​ $ 654,406 ​ $ 600,943 ​ $ 422,330 ​ $ 872,481 ​ $ 889,978 ​ $ 14,449 ​ $ 4,505,735
Schedule of collateral dependent loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ Total amortized ​ Real property ​ Business assets ​ cost basis Commercial ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial $ 5,965 ​ $ 3,519 ​ $ 9,484 Owner-occupied commercial real estate ​ 1,331 ​ ​ — ​ ​ 1,331 Food and agribusiness ​ 422 ​ ​ 314 ​ ​ 736 Total Commercial ​ 7,718 ​ ​ 3,833 ​ ​ 11,551 Commercial real estate non owner-occupied ​ ​ ​ ​ ​ ​ ​ ​ Acquisition/development 1,303 ​ — ​ 1,303 Total commercial real estate 1,303 ​ — ​ 1,303 Residential real estate ​ ​ ​ ​ ​ Senior lien 3,479 ​ — ​ 3,479 Total residential real estate 3,479 ​ — ​ 3,479 Total loans $ 12,500 ​ $ 3,833 ​ $ 16,333
Additional Information Related to Accruing TDR's	During the three months ended March 31, 2020, the Company restructured 2 loans with an amortized cost basis of $1.9 million to facilitate repayment. Included in the total TDR balance as of March 31, 2020 were loans totaling $4.2 million previously accounted for under ASC 310-30. Loan modifications were a reduction of the principal payment, a reduction in interest rate, or an extension of term. The tables below provide additional information related to accruing TDRs at March 31, 2020 and December 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Amortized ​ Average year-to-date ​ Unpaid ​ Unfunded commitments ​ ​ cost basis ​ amortized cost basis ​ principal balance ​ to fund TDRs Commercial ​ $ 6,093 ​ $ 6,155 ​ $ 6,781 ​ $ 150 Commercial real estate non-owner occupied ​ 2,183 ​ 2,208 ​ 4,428 ​ — Residential real estate ​ 2,009 ​ 2,023 ​ 2,893 ​ 12 Consumer ​ — ​ — ​ — ​ — Total ​ $ 10,285 ​ $ 10,386 ​ $ 14,102 ​ $ 162 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ Amortized ​ Average year-to-date ​ Unpaid ​ Unfunded commitments ​ ​ cost basis ​ amortized cost basis ​ principal balance ​ to fund TDRs Commercial ​ $ 5,615 ​ $ 5,788 ​ $ 5,714 ​ $ — Commercial real estate non-owner occupied ​ 141 ​ 172 ​ 192 ​ — Residential real estate ​ 1,129 ​ 1,178 ​ 1,206 ​ 12 Consumer ​ — ​ — ​ — ​ — Total ​ $ 6,885 ​ $ 7,138 ​ $ 7,112 ​ $ 12
Summary of Company's Carrying Value of Non-Accrual TDR's	The following table summarizes the Company’s carrying value of non-accrual TDRs as of March 31, 2020 and December 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 Commercial $ 1,873 $ 1,891 Commercial real estate non-owner occupied ​ 257 ​ 410 Residential real estate ​ 2,560 ​ 2,553 Consumer ​ — ​ — Total non-accruing TDRs ​ $ 4,690 ​ $ 4,854

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2020
Credit Loss [Abstract]
Summary of Company's Allowance for Loan Losses ("ALL") and Recorded Investment in Loans	The table below details the Company’s allowance for credit losses as of and for the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended March 31, 2020 ​ ​ ​ ​ ​ Non-owner ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ commercial ​ Residential ​ ​ ​ ​ ​ ​ ​ Commercial real estate real estate Consumer Total Beginning balance ​ $ 30,442 ​ $ 4,850 ​ $ 3,468 ​ $ 304 ​ $ 39,064 Cumulative effect adjustment (1) ​ ​ (1,299) ​ ​ 1,666 ​ ​ 5,314 ​ ​ 155 ​ ​ 5,836 Charge-offs ​ (218) ​ — ​ (28) ​ ​ (251) ​ (497) Recoveries ​ 91 ​ — ​ 5 ​ 48 ​ 144 Provision ​ 1,541 ​ 2,762 ​ 1,937 ​ 169 ​ 6,409 Ending balance ​ $ 30,557 ​ $ 9,278 ​ $ 10,696 ​ $ 425 ​ $ 50,956 ​ ​ ​ (1) ​ Related to the adoption of Accounting Standards Update No. 2016-13, Measurement of Credit Losses on Financial Instruments ​ The table below details the Company’s allowance for loan losses as of and for the three months ended March 31, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended March 31, 2019 ​ ​ ​ ​ ​ Non-owner ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ commercial ​ Residential ​ ​ ​ ​ ​ ​ ​ Commercial real estate real estate Consumer Total Beginning balance ​ $ 27,137 ​ $ 4,406 ​ $ 3,800 ​ $ 349 ​ $ 35,692 Charge-offs ​ (12) ​ — ​ (23) ​ (233) ​ (268) Recoveries ​ 27 ​ 11 ​ 13 ​ 46 ​ 97 Provision ​ 923 ​ 497 ​ (72) ​ 186 ​ 1,534 Ending balance ​ $ 28,075 ​ $ 4,914 ​ $ 3,718 ​ $ 348 ​ $ 37,055

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2020
Other Real Estate Owned
Summary of Activity in OREO Balances	A summary of the activity in OREO during the three months ended March 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended March 31, ​ 2020 ​ 2019 Beginning balance $ 7,300 $ 10,596 Transfers from loan portfolio, at fair value 18 ​ 288 Impairments — ​ (596) Sales (267) ​ (894) Ending balance $ 7,051 ​ $ 9,394

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2020
Summary of gross carrying amount of intangible assets and the associated accumulated amortization	The gross carrying amount of the core deposit intangibles and the associated accumulated amortization at March 31, 2020 and December 31, 2019, are presented as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ December 31, 2019 ​ Gross ​ ​ ​ ​ Net ​ Gross ​ ​ ​ ​ Net ​ carrying ​ Accumulated ​ carrying ​ carrying ​ Accumulated ​ carrying ​ amount ​ amortization ​ amount ​ amount ​ amortization ​ amount Core deposit intangible $ 48,834 $ (40,399) ​ $ 8,435 ​ $ 48,834 $ (40,103) ​ $ 8,731
Summary of changes in the mortgage servicing rights	Below are the changes in the MSRs for the periods presented: ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended March 31, ​ 2020 ​ 2019 Beginning balance $ 2,630 $ 3,556 Originations ​ 142 ​ ​ 13 Impairment ​ (509) ​ ​ (54) Amortization (210) ​ (153) Ending balance $ 2,053 ​ $ 3,362 Fair value of mortgage servicing rights $ 2,053 ​ $ 3,564 ​
Core Deposits
Summary of estimated future amortization expense for the next five fiscal years	The following table shows the estimated future amortization expense for the core deposit intangibles as of March 31, 2020: ​ ​ ​ ​ Years ending December 31, ​ Amount For the nine months ending December 31, 2020 $ 887 For the year ending December 31, 2021 ​ 1,183 For the year ending December 31, 2022 ​ 1,127 For the year ending December 31, 2023 ​ 1,048 For the year ending December 31, 2024 ​ 1,048
Mortgage servicing rights
Summary of estimated future amortization expense for the next five fiscal years	The following table shows the estimated future amortization expense for the MSRs as of March 31, 2020: ​ ​ ​ ​ Years ending December 31, ​ Amount For the nine months ending December 31, 2020 $ 359 For the year ending December 31, 2021 ​ 395 For the year ending December 31, 2022 ​ 303 For the year ending December 31, 2023 ​ 232 For the year ending December 31, 2024 ​ 178

Regulatory Capital (Tables)

Regulatory Capital (Tables)	3 Months Ended
	Mar. 31, 2020
Regulatory Capital
Capital Ratio Requirements under Prompt Corrective Action or Other Regulatory Requirements	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ ​ ​ ​ ​ ​ Required to be ​ Required to be ​ ​ ​ ​ ​ ​ ​ well capitalized under ​ considered ​ ​ ​ ​ ​ ​ ​ prompt corrective ​ adequately ​ ​ Actual ​ action provisions ​ capitalized (1) ​ Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 11.1% ​ $ 633,216 N/A ​ ​ N/A 4.0% ​ $ 229,316 NBH Bank 9.5% ​ 547,337 5.0% ​ $ 286,928 4.0% ​ 229,542 Common equity tier 1 risk based capital: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 12.9% ​ $ 633,216 ​ N/A ​ ​ N/A ​ 7.0% ​ $ 344,510 NBH Bank ​ 11.1% ​ ​ 547,337 ​ 6.5% ​ $ 319,675 ​ 7.0% ​ ​ 344,266 Tier 1 risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 12.9% ​ $ 633,216 N/A ​ ​ N/A 8.5% ​ $ 418,333 NBH Bank 11.1% ​ 547,337 8.0% ​ $ 393,447 8.5% ​ 418,037 Total risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 13.8% ​ $ 679,976 N/A ​ ​ N/A 10.5% ​ $ 516,765 NBH Bank 12.1% ​ 594,097 10.0% ​ $ 491,808 10.5% ​ 516,399 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ ​ Required to be ​ Required to be ​ ​ ​ ​ ​ ​ ​ well capitalized under ​ considered ​ ​ ​ ​ ​ ​ ​ prompt corrective ​ adequately ​ ​ Actual ​ action provisions ​ capitalized (1) ​ Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 11.0% ​ $ 640,440 N/A ​ ​ N/A 4.0% ​ $ 231,950 NBH Bank 9.1% ​ 528,028 5.0% ​ $ 289,926 4.0% ​ 231,940 Common equity tier 1 risk based capital: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 13.2% ​ $ 640,440 ​ N/A ​ ​ N/A ​ 7.0% ​ $ 405,912 NBH Bank ​ 10.9% ​ ​ 528,028 ​ 6.5% ​ $ 376,903 ​ 7.0% ​ ​ 405,896 Tier 1 risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 13.2% ​ $ 640,440 N/A ​ ​ N/A 8.5% ​ $ 412,620 NBH Bank 10.9% ​ 528,028 8.0% ​ $ 387,701 8.5% ​ 411,932 Total risk based capital ratio: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated 14.1% ​ $ 682,645 N/A ​ ​ N/A 10.5% ​ $ 509,707 NBH Bank 11.8% ​ 570,233 10.0% ​ $ 484,626 10.5% ​ 508,857 ​ ​ ​ ​ (1) ​ As of the fully phased-in date of January 1, 2019, including the capital conservation buffer.

Revenue from Contracts with C_2

Revenue from Contracts with Clients (Tables)	3 Months Ended
	Mar. 31, 2020
Revenue from Contracts with Clients
Summary of non-interest income segregated by revenue streams	The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, and non-interest expense in-scope of Topic 606 for the three months ended March 31, 2020 and 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended March 31, ​ 2020 2019 Non-interest income ​ ​ ​ ​ ​ ​ In-scope of Topic 606: ​ ​ ​ ​ ​ ​ Service charges and other fees ​ $ 4,665 ​ $ 4,843 Bank card fees ​ ​ 3,513 ​ ​ 3,428 Non-interest income (in-scope of Topic 606) ​ ​ 8,178 ​ ​ 8,271 Non-interest income (out-of-scope of Topic 606) ​ ​ 15,354 ​ ​ 8,780 Total non-interest income ​ $ 23,532 ​ $ 17,051 Non-interest expense ​ ​ ​ ​ ​ ​ In-scope of Topic 606: ​ ​ ​ ​ ​ ​ (Loss) gain on OREO sales, net ​ (39) ​ 368 Total revenue in-scope of Topic 606 ​ $ 8,139 ​ $ 8,639

Stock-based Compensation and _2

Stock-based Compensation and Benefits (Tables)	3 Months Ended
	Mar. 31, 2020
Stock-based Compensation and Benefits
Summary of Option Activity	The following table summarizes stock option activity for the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ ​ average ​ ​ ​ ​ ​ ​ ​ Weighted ​ remaining ​ ​ ​ ​ ​ ​ ​ average ​ contractual ​ Aggregate ​ ​ ​ ​ exercise ​ term in ​ intrinsic ​ ​ Options ​ price ​ years ​ value Outstanding at December 31, 2019 657,114 ​ $ 26.69 6.41 ​ $ 5,626 Granted — ​ — ​ ​ ​ ​ ​ Exercised ​ (2,479) ​ ​ 20.18 ​ ​ ​ ​ ​ Forfeited (2,326) ​ 32.01 ​ ​ ​ ​ ​ Outstanding at March 31, 2020 652,309 ​ $ 26.69 6.17 ​ $ 1,438 Options exercisable at March 31, 2020 402,235 ​ ​ 22.31 4.76 ​ ​ 1,438 Options vested and expected to vest 633,925 ​ ​ 26.48 6.10 ​ ​ 1,438
Summary of Restricted Stock Activity	The following table summarizes restricted stock and performance stock unit activity during the three months ended March 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ Weighted ​ ​ Restricted ​ average grant- ​ Performance ​ ​ average grant- ​ ​ stock shares ​ date fair value ​ stock units ​ ​ date fair value Unvested at December 31, 2019 ​ 122,198 ​ $ 34.19 ​ 158,874 ​ $ 31.19 Granted ​ — ​ ​ — ​ — ​ ​ — Adjustment due to performance ​ — ​ ​ — ​ 17,852 ​ ​ 33.22 Vested ​ — ​ ​ — ​ (53,540) ​ ​ 33.22 Forfeited ​ (1,575) ​ ​ 34.07 ​ (328) ​ ​ 30.38 Unvested at March 31, 2020 ​ 120,623 ​ $ 34.19 ​ 122,858 ​ $ 30.61

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share
Schedule of Computation of Basic and Diluted Income (Loss) Per Share	The following table illustrates the computation of basic and diluted earnings per share for the three months ended March 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ March 31, 2020 March 31, 2019 Net income ​ $ 15,824 ​ $ 18,922 Less: income allocated to participating securities ​ (24) ​ (18) Income allocated to common shareholders ​ $ 15,800 ​ $ 18,904 Weighted average shares outstanding for basic earnings per common share ​ 31,157,476 ​ 30,961,187 Dilutive effect of equity awards ​ 203,820 ​ 536,351 Weighted average shares outstanding for diluted earnings per common share ​ 31,361,296 ​ 31,497,538 Basic earnings per share ​ $ 0.51 ​ $ 0.61 Diluted earnings per share ​ ​ 0.50 ​ ​ 0.60

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2020
Derivatives
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Asset derivatives fair value ​ ​ ​ Liability derivatives fair value ​ ​ Balance Sheet ​ March 31, ​ December 31, ​ Balance Sheet ​ March 31, ​ December 31, ​ location 2020 2019 Location 2020 2019 Derivatives designated as hedging instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate products Other assets ​ $ — ​ $ 1,171 Other liabilities ​ $ 46,573 ​ $ 13,537 Total derivatives designated as hedging instruments ​ ​ ​ $ — ​ $ 1,171 ​ ​ ​ $ 46,573 ​ $ 13,537 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not designated as hedging instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate products Other assets ​ $ 21,853 ​ $ 9,004 Other liabilities ​ $ 21,894 ​ $ 9,021 Interest rate lock commitments ​ Other assets ​ ​ 6,737 ​ ​ 1,499 ​ Other liabilities ​ ​ 166 ​ ​ 141 Forward contracts ​ Other assets ​ ​ 45 ​ ​ 16 ​ Other liabilities ​ ​ 6,035 ​ ​ 299 Total derivatives not designated as hedging instruments ​ ​ ​ $ 28,635 ​ $ 10,519 ​ ​ ​ $ 28,095 ​ $ 9,461
Derivative Instruments, Gain (Loss)	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of gain (loss) ​ Amount of (loss) gain recognized in income on derivatives Derivatives in fair value ​ recognized in income on ​ For the three months ended March 31, hedging relationships derivatives 2020 2019 Interest rate products Interest and fees on loans ​ $ (34,770) ​ $ 10,136 Total ​ ​ ​ $ (34,770) ​ $ 10,136 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of gain (loss) ​ Amount of gain (loss) recognized in income on hedged items ​ ​ recognized in income on ​ For the three months ended March 31, Hedged items hedged items 2020 2019 Interest rate products Interest and fees on loans ​ $ 33,778 $ (10,515) Total ​ ​ ​ $ 33,778 $ (10,515) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of gain (loss) ​ Amount of gain (loss) recognized in income on derivatives Derivatives not designated ​ recognized in income on ​ For the three months ended March 31, as hedging instruments derivatives 2020 2019 Interest rate products Other non-interest expense $ (23) $ 273 Interest rate lock commitments ​ Mortgage banking income ​ ​ 7,503 ​ ​ 1,152 Forward contracts ​ Mortgage banking income ​ ​ (5,707) ​ ​ (800) Total ​ ​ $ 1,773 $ 625

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies
Schedule of Total Unfunded Commitments	​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 December 31, 2019 Commitments to fund loans ​ $ 305,931 ​ $ 249,914 Unfunded commitments under lines of credit ​ 510,529 ​ 600,407 Commercial and standby letters of credit ​ 10,478 ​ 11,929 Total unfunded commitments ​ $ 826,938 ​ $ 862,250

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Tables of Financial Instruments Measured At Fair Value on Recurring Basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Level 1 ​ Level 2 ​ Level 3 ​ Total Assets: ​ ​ ​ ​ Investment securities available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ — ​ $ 88,549 ​ $ — ​ $ 88,549 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ — ​ 539,875 ​ — ​ 539,875 Municipal securities ​ ​ — ​ ​ 388 ​ ​ — ​ ​ 388 Loans held for sale ​ — ​ 127,439 ​ — ​ 127,439 Interest rate swap derivatives ​ — ​ 21,853 ​ — ​ 21,853 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 6,782 ​ ​ 6,782 Total assets at fair value ​ $ — ​ $ 778,104 ​ $ 6,782 ​ $ 784,886 Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap derivatives ​ $ — ​ $ 68,467 ​ $ — ​ $ 68,467 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 6,201 ​ ​ 6,201 Total liabilities at fair value ​ $ — ​ $ 68,467 ​ $ 6,201 ​ $ 74,668 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Level 1 Level 2 Level 3 Total Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ $ — ​ $ 95,256 ​ $ — ​ $ 95,256 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises ​ — ​ 542,037 ​ — ​ 542,037 Municipal securities ​ ​ — ​ ​ 372 ​ ​ — ​ ​ 372 Loans held for sale ​ — ​ 117,444 ​ — ​ 117,444 Interest rate swap derivatives ​ — ​ 10,175 ​ — ​ 10,175 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 1,515 ​ ​ 1,515 Total assets at fair value ​ $ — ​ $ 765,284 ​ $ 1,515 ​ $ 766,799 Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap derivatives ​ $ — ​ $ 22,558 ​ $ — ​ $ 22,558 Mortgage banking derivatives ​ ​ — ​ ​ — ​ ​ 440 ​ ​ 440 Total liabilities at fair value ​ $ — ​ $ 22,558 ​ $ 440 ​ $ 22,998
Table of Changes in Level 3 Financial Instruments	​ ​ ​ ​ ​ ​ ​ Mortgage banking ​ ​ ​ derivatives, net Balance at December 31, 2019 ​ $ 1,075 Gain included in earnings, net ​ ​ 1,796 Fees and costs included in earnings, net ​ (2,290) Balance at March 31, 2020 ​ $ 581
Table of assets recorded at fair value on a non-recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2020 ​ ​ Total ​ Losses from fair value changes Individually evaluated loans ​ $ 35,935 ​ $ 497 Mortgage servicing rights ​ 2,053 ​ 509 Total ​ $ 37,988 ​ $ 1,006 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2019 ​ ​ Total ​ Losses from fair value changes Individually evaluated loans ​ $ 32,743 ​ $ 245 Other real estate owned ​ 9,394 ​ 596 Mortgage servicing rights ​ ​ 3,362 ​ ​ 54 Total ​ $ 45,499 ​ $ 895

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level in fair value March 31, 2020 December 31, 2019 ​ ​ measurement ​ Carrying ​ Estimated ​ Carrying ​ Estimated ​ ​ hierarchy ​ amount fair value amount fair value ASSETS ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents Level 1 ​ $ 133,926 ​ $ 133,926 ​ $ 110,190 ​ $ 110,190 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 ​ 88,549 ​ 88,549 ​ 95,256 ​ 95,256 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 ​ 539,875 ​ 539,875 ​ 542,037 ​ 542,037 Municipal securities available-for-sale ​ Level 2 ​ ​ 388 ​ ​ 388 ​ ​ 372 ​ ​ 372 Municipal securities available-for-sale ​ Level 3 ​ ​ 115 ​ ​ 115 ​ ​ 115 ​ ​ 115 Other available-for-sale securities Level 3 ​ 469 ​ 469 ​ 469 ​ 469 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 ​ 144,218 ​ 148,283 ​ 127,560 ​ 128,770 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 ​ 48,684 ​ 49,314 ​ 55,324 ​ 54,971 Non-marketable securities ​ Level 2 ​ ​ 29,948 ​ ​ 29,948 ​ ​ 29,751 ​ ​ 29,751 Loans receivable Level 3 ​ 4,505,735 ​ 4,719,261 ​ 4,415,406 ​ 4,481,209 Loans held for sale Level 2 ​ 127,439 ​ 127,439 ​ 117,444 ​ 117,444 Accrued interest receivable Level 2 ​ 22,028 ​ 22,028 ​ 19,157 ​ 19,157 Interest rate swap derivatives Level 2 ​ 21,853 ​ 21,853 ​ 10,175 ​ 10,175 Mortgage banking derivatives ​ Level 3 ​ ​ 6,782 ​ ​ 6,782 ​ ​ 1,515 ​ ​ 1,515 LIABILITIES ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposit transaction accounts Level 2 ​ 3,690,875 ​ 3,690,875 ​ 3,678,979 ​ 3,678,979 Time deposits Level 2 ​ 1,050,981 ​ 1,059,344 ​ 1,058,153 ​ 1,058,354 Securities sold under agreements to repurchase Level 2 ​ 23,703 ​ 23,703 ​ 56,935 ​ 56,935 Federal Home Loan Bank advances Level 2 ​ 341,506 ​ 341,650 ​ 207,675 ​ 207,890 Accrued interest payable Level 2 ​ 9,562 ​ 9,562 ​ 9,328 ​ 9,328 Interest rate swap derivatives ​ Level 2 ​ ​ 68,467 ​ ​ 68,467 ​ 22,558 ​ 22,558 Mortgage banking derivatives Level 3 ​ 6,201 ​ 6,201 ​ ​ 440 ​ ​ 440

Basis of Presentation (Details)

Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2020item
Basis of Presentation
Number of full service banking offices	101
Number of primary loan segment	4
Number of loan classes	11

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 168,984		$ 164,082
ASU 2016-13 | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for credit losses		$ 5,800
Retained earnings		(5,800)
Increase in allowance for credit losses net of tax		4,600
ASU 2016-13 | Restatement Adjustment | Mortgage-Backed Securities (MBS) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for credit losses		$ 0

Investment Securities - Narrati

Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)security	Dec. 31, 2019USD ($)security
Investment securities total	$ 800,000	$ 800,000
Amortized cost	615,333	638,009
Available-for-sale securities	629,396	638,249
Held-to-maturity securities	$ 192,902	$ 182,884
Number of securities | security	10	67
Fair value of available-for-sale securities in an unrealized loss position	$ 13,264	$ 308,569
Pledged as collateral for line of credit at the Federal Home Loan Bank	16,500	17,600
Fair value of collateral	13,800	7,000
OTTI charges recorded	0
Fair value of available-for-sale investment securities pledged as collateral	$ 372,100	$ 352,300
Type of available-for-sale investment securities collateral	us-gaap:AssetPledgedAsCollateralMember	us-gaap:AssetPledgedAsCollateralMember
Number of held-to-maturity securities in unrealized loss positions | security	0	13
Fair value of held-to-maturity securities in an unrealized loss position		$ 43,295
Held-to-maturity investment securities pledged as collateral	$ 168,400	$ 144,200
Type of held-to-maturity investment securities collateral	us-gaap:AssetPledgedAsCollateralMember	us-gaap:AssetPledgedAsCollateralMember
Estimated weighted average expected life of the held-to-maturity mortgage-backed securities portfolio	2 years	2 years 4 months 24 days
Life of the held-to-maturity investment portfolio	1 year 10 months 24 days	2 years 3 months 18 days
Investment Securities Available-For-Sale [Member]
Accrued interest receivable	$ 1,700	$ 1,500
Held-to-maturity Securities [Member]
Accrued interest receivable	500	500
Municipal securities maturing within one to five years [Member]
Amortized cost	500
Available-for-sale securities	500
Other Securities Investments with No Contractual Maturity [Member]
Amortized cost	500
Other Securities [Member]
Amortized cost	469	469
Available-for-sale securities	$ 469	$ 469

Investment Securities - Summary

Investment Securities - Summary of Available-for-Sale Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 615,333	$ 638,009
Gross unrealized gains	14,173	5,315
Gross unrealized losses	(110)	(5,075)
Investment securities available-for-sale (at fair value)	629,396	638,249
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	85,972	93,770
Gross unrealized gains	2,577	1,497
Gross unrealized losses		(11)
Investment securities available-for-sale (at fair value)	88,549	95,256
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	528,397	543,275
Gross unrealized gains	11,588	3,818
Gross unrealized losses	(110)	(5,056)
Investment securities available-for-sale (at fair value)	539,875	542,037
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	495	495
Gross unrealized gains	8
Gross unrealized losses		(8)
Investment securities available-for-sale (at fair value)	503	487
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	469	469
Investment securities available-for-sale (at fair value)	$ 469	$ 469

Investment Securities - Summa_2

Investment Securities - Summary of Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 6,257	$ 52,396
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3)	(288)
12 months or more, Fair Value	7,007	256,173
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(107)	(4,787)
Total, Fair Value	13,264	308,569
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(110)	(5,075)
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		10,413
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(7)
12 months or more, Fair Value		1,421
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(4)
Total, Fair Value		11,834
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(11)
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	6,257	41,983
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3)	(281)
12 months or more, Fair Value	7,007	254,380
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(107)	(4,775)
Total, Fair Value	13,264	296,363
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (110)	(5,056)
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
12 months or more, Fair Value		372
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(8)
Total, Fair Value		372
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (8)

Investment Securities - Summa_3

Investment Securities - Summary of Held-to-maturity Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	$ 192,902	$ 182,884
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	4,695	1,321
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss		(464)
Fair value	197,597	183,741
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	144,218	127,560
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	4,065	1,239
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss		(29)
Fair value	148,283	128,770
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	48,684	55,324
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	630	82
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss		(435)
Fair value	$ 49,314	$ 54,971

Investment Securities - Summa_4

Investment Securities - Summary of Held-to-Maturity Securities, Unrealized Losses (Details) $ in Thousands	Dec. 31, 2019USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Fair Value, Less than 12 months	$ 14,403
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(35)
Fair Value, 12 months or more	28,892
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(429)
Total Fair Value	43,295
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(464)
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Fair Value, Less than 12 months	10,478
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(26)
Fair Value, 12 months or more	338
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(3)
Total Fair Value	10,816
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(29)
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Fair Value, Less than 12 months	3,925
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(9)
Fair Value, 12 months or more	28,554
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(426)
Total Fair Value	32,479
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (435)

Loans - Loan Portfolio Composit

Loans - Loan Portfolio Composition Including Carrying Value by Segment of Loans Accounted for under ASC Topic 310-30 (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans [Line Items]
Total Loans	$ 4,505,735	$ 4,415,406
% of Total	100.00%	100.00%
Commercial Loan [Member]
Loans [Line Items]
% of Total	68.20%	67.80%
Commercial Real Estate [Member]
Loans [Line Items]
% of Total	14.30%	14.30%
Residential Real Estate Segment [Member]
Loans [Line Items]
% of Total	17.00%	17.40%
Consumer [Member]
Loans [Line Items]
% of Total	0.50%	0.50%
Originated and acquired loans [Member]
Loans [Line Items]
Fees and cost related to loans	$ 19,000	$ 21,900
Total Loans	4,505,735	4,415,406
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	3,074,096	2,992,307
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	643,727	630,906
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	766,324	770,417
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	$ 21,588	$ 21,776

Loans - Loan Delinquency (Detai

Loans - Loan Delinquency (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Loans [Line Items]
Total	$ 4,505,735	$ 4,415,406
Interest income recognized non-accrual	0
Originated and acquired loans [Member]
Loans [Line Items]
Total	4,505,735	4,415,406
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total	3,074,096	2,992,307
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total	643,727	630,906
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total	766,324	770,417
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total	21,588	21,776
Total Loans [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Non- accrual loans	21,327	21,748
Total past due and non-accrual	33,384	29,760
Current	4,472,351	4,385,646
Total	4,505,735	4,415,406
Non-accrual loans with a related allowance	12,820
Non-accrual loans with no related allowance	8,507
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Current	86,123	77,733
Total	86,123	77,733
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Non- accrual loans	261	416
Total past due and non-accrual	321	603
Current	26,982	26,276
Total	27,303	26,879
Non-accrual loans with a related allowance	3
Non-accrual loans with no related allowance	258
Total Loans [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Current	77,336	55,808
Total	77,336	55,808
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Non- accrual loans	8,920	10,330
Total past due and non-accrual	14,237	13,461
Current	1,424,313	1,398,070
Total	1,438,550	1,411,531
Non-accrual loans with a related allowance	6,081
Non-accrual loans with no related allowance	2,839
Total Loans [Member] | Originated and acquired loans [Member] | Municipal [Member]
Loans [Line Items]
Total past due and non-accrual		226
Current	877,084	837,300
Total	877,084	837,526
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	2,314	2,264
Total past due and non-accrual	3,562	3,489
Current	512,352	486,633
Total	515,914	490,122
Non-accrual loans with a related allowance	805
Non-accrual loans with no related allowance	1,509
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	39	43
Total past due and non-accrual	1,490	546
Current	451,475	469,940
Total	452,965	470,486
Non-accrual loans with a related allowance	39
Total Loans [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Non- accrual loans	300	459
Total past due and non-accrual	1,811	1,149
Current	641,916	629,757
Total	643,727	630,906
Non-accrual loans with a related allowance	42
Non-accrual loans with no related allowance	258
Total Loans [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Non- accrual loans	8,257	7,597
Total past due and non-accrual	11,384	9,707
Current	663,270	668,955
Total	674,654	678,662
Non-accrual loans with a related allowance	4,778
Non-accrual loans with no related allowance	3,479
Total Loans [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Non- accrual loans	763	731
Total past due and non-accrual	1,246	1,055
Current	90,424	90,700
Total	91,670	91,755
Non-accrual loans with a related allowance	763
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Non- accrual loans	11,969	12,911
Total past due and non-accrual	18,851	17,683
Current	3,055,245	2,974,624
Total	3,074,096	2,992,307
Non-accrual loans with a related allowance	7,199
Non-accrual loans with no related allowance	4,770
Total Loans [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Non- accrual loans	735	317
Total past due and non-accrual	1,052	507
Current	241,496	252,621
Total	242,548	253,128
Non-accrual loans with a related allowance	313
Non-accrual loans with no related allowance	422
Total Loans [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Non- accrual loans	9,020	8,328
Total past due and non-accrual	12,630	10,762
Current	753,694	759,655
Total	766,324	770,417
Non-accrual loans with a related allowance	5,541
Non-accrual loans with no related allowance	3,479
Total Loans [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Non- accrual loans	38	50
Total past due and non-accrual	92	166
Current	21,496	21,610
Total	21,588	21,776
Non-accrual loans with a related allowance	38
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Past due loans	10,693	6,350
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Past due loans	60	187
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Past due loans	4,603	2,252
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Municipal [Member]
Loans [Line Items]
Past due loans		226
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Past due loans	1,085	595
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Past due loans	1,451	438
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Past due loans	1,511	625
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Past due loans	2,640	2,101
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Past due loans	483	245
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Past due loans	6,005	3,263
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Past due loans	317	190
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Past due loans	3,123	2,346
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Past due loans	54	116
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Past due loans	1,364	1,662
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Past due loans	714	879
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Past due loans	163	630
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Past due loans		65
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Past due loans		65
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Past due loans	487	9
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Past due loans		79
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Past due loans	877	1,509
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Past due loans	$ 487	$ 88

Loans - Carrying Value of Loan

Loans - Carrying Value of Loan Portfolio by Segment and Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 282,416
2019	768,732
2018	654,406
2017	600,943
2016	422,330
Prior	872,481
Revolving Loans Amortized Cost Basis	889,978
Revolving Loans Converted to Term	14,449
Total	4,505,735	$ 4,415,406
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	179,789
2019	497,172
2018	530,858
2017	356,309
2016	239,120
Prior	477,868
Revolving Loans Amortized Cost Basis	780,457
Revolving Loans Converted to Term	12,523
Total	3,074,096
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	77,093
2019	266,082
2018	244,592
2017	110,999
2016	43,872
Prior	46,737
Revolving Loans Amortized Cost Basis	637,699
Revolving Loans Converted to Term	11,476
Total	1,438,550
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	77,093
2019	263,719
2018	237,591
2017	107,183
2016	37,660
Prior	40,127
Revolving Loans Amortized Cost Basis	629,234
Revolving Loans Converted to Term	11,476
Total	1,404,083
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	968
2018	5,910
2017	279
2016	5,813
Prior	1,226
Revolving Loans Amortized Cost Basis	5,115
Total	19,311
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	1,395
2018	1,091
2017	3,106
2016	399
Prior	4,710
Revolving Loans Amortized Cost Basis	3,314
Total	14,015
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2017	431
Prior	674
Revolving Loans Amortized Cost Basis	36
Total	1,141
Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	35,696
2019	121,398
2018	107,988
2017	63,422
2016	48,440
Prior	136,413
Revolving Loans Amortized Cost Basis	1,919
Revolving Loans Converted to Term	638
Total	515,914
Commercial Portfolio Segment [Member] | Owner-Occupied [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	35,696
2019	121,398
2018	99,248
2017	51,857
2016	42,753
Prior	112,635
Revolving Loans Amortized Cost Basis	1,919
Revolving Loans Converted to Term	638
Total	466,144
Commercial Portfolio Segment [Member] | Owner-Occupied [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2018	4,775
2017	11,565
2016	5,687
Prior	17,558
Total	39,585
Commercial Portfolio Segment [Member] | Owner-Occupied [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2018	3,965
Prior	6,220
Total	10,185
Commercial Portfolio Segment [Member] | Food and Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,778
2019	11,194
2018	35,979
2017	8,177
2016	10,637
Prior	32,871
Revolving Loans Amortized Cost Basis	137,503
Revolving Loans Converted to Term	409
Total	242,548
Commercial Portfolio Segment [Member] | Food and Agriculture [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,778
2019	11,194
2018	35,979
2017	7,858
2016	10,637
Prior	30,853
Revolving Loans Amortized Cost Basis	137,246
Revolving Loans Converted to Term	409
Total	239,954
Commercial Portfolio Segment [Member] | Food and Agriculture [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	926
Total	926
Commercial Portfolio Segment [Member] | Food and Agriculture [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2017	319
Prior	1,086
Revolving Loans Amortized Cost Basis	231
Total	1,636
Commercial Portfolio Segment [Member] | Food and Agriculture [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	6
Revolving Loans Amortized Cost Basis	26
Total	32
Commercial Portfolio Segment [Member] | Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	61,222
2019	98,498
2018	142,299
2017	173,711
2016	136,171
Prior	261,847
Revolving Loans Amortized Cost Basis	3,336
Total	877,084
Commercial Portfolio Segment [Member] | Municipal [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	61,222
2019	98,498
2018	142,299
2017	173,711
2016	136,171
Prior	261,847
Revolving Loans Amortized Cost Basis	3,336
Total	877,084
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	64,254
2019	140,529
2018	55,390
2017	167,658
2016	60,555
Prior	146,774
Revolving Loans Amortized Cost Basis	7,908
Revolving Loans Converted to Term	659
Total	643,727
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	6,727
2019	32,167
2018	16,823
2017	24,059
Revolving Loans Amortized Cost Basis	5,688
Revolving Loans Converted to Term	659
Total	86,123
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	6,573
2019	32,167
2018	16,823
2017	24,059
Revolving Loans Amortized Cost Basis	5,688
Revolving Loans Converted to Term	659
Total	85,969
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	154
Total	154
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,659
2019	2,424
2018	2,313
2017	8,591
2016	4,598
Prior	4,623
Revolving Loans Amortized Cost Basis	95
Total	27,303
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,659
2019	2,424
2018	2,313
2017	8,554
2016	4,598
Prior	4,177
Revolving Loans Amortized Cost Basis	95
Total	26,820
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2017	37
Prior	446
Total	483
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	21,468
2019	13,886
2018	1,832
2017	8,387
2016	21,374
Prior	10,389
Total	77,336
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	21,468
2019	13,886
2018	1,832
2017	8,387
2016	21,374
Prior	9,912
Total	76,859
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	5
Total	5
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	472
Total	472
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	31,400
2019	92,052
2018	34,422
2017	126,621
2016	34,583
Prior	131,762
Revolving Loans Amortized Cost Basis	2,125
Total	452,965
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	31,400
2019	92,052
2018	29,996
2017	126,447
2016	34,583
Prior	129,563
Revolving Loans Amortized Cost Basis	2,125
Total	446,166
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2018	4,360
2017	174
Prior	1,312
Total	5,846
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2018	66
Prior	887
Total	953
Residential Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	35,026
2019	122,233
2018	65,225
2017	75,684
2016	121,808
Prior	246,751
Revolving Loans Amortized Cost Basis	98,401
Revolving Loans Converted to Term	1,196
Total	766,324
Residential Portfolio Segment [Member] | Senior lien
Financing Receivable, Credit Quality Indicator [Line Items]
2020	33,699
2019	116,053
2018	61,032
2017	73,317
2016	120,561
Prior	241,440
Revolving Loans Amortized Cost Basis	28,184
Revolving Loans Converted to Term	368
Total	674,654
Residential Portfolio Segment [Member] | Senior lien | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	33,597
2019	115,680
2018	61,000
2017	71,750
2016	120,014
Prior	234,663
Revolving Loans Amortized Cost Basis	27,935
Revolving Loans Converted to Term	276
Total	664,915
Residential Portfolio Segment [Member] | Senior lien | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	444
Revolving Loans Amortized Cost Basis	249
Total	693
Residential Portfolio Segment [Member] | Senior lien | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	102
2019	373
2018	32
2017	1,567
2016	547
Prior	6,333
Revolving Loans Converted to Term	92
Total	9,046
Residential Portfolio Segment [Member] | Junior lien
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,327
2019	6,180
2018	4,193
2017	2,367
2016	1,247
Prior	5,311
Revolving Loans Amortized Cost Basis	70,217
Revolving Loans Converted to Term	828
Total	91,670
Residential Portfolio Segment [Member] | Junior lien | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,327
2019	6,180
2018	3,962
2017	2,251
2016	1,067
Prior	5,010
Revolving Loans Amortized Cost Basis	69,799
Revolving Loans Converted to Term	828
Total	90,424
Residential Portfolio Segment [Member] | Junior lien | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	21
Revolving Loans Amortized Cost Basis	344
Total	365
Residential Portfolio Segment [Member] | Junior lien | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2018	231
2017	116
2016	180
Prior	280
Revolving Loans Amortized Cost Basis	74
Total	881
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,347
2019	8,798
2018	2,933
2017	1,292
2016	847
Prior	1,088
Revolving Loans Amortized Cost Basis	3,212
Revolving Loans Converted to Term	71
Total	21,588
Consumer Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,347
2019	8,797
2018	2,933
2017	1,292
2016	821
Prior	1,077
Revolving Loans Amortized Cost Basis	3,212
Revolving Loans Converted to Term	71
Total	21,550
Consumer Loan [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	1
2016	26
Prior	11
Total	$ 38

Loans - Impaired Loans - Averag

Loans - Impaired Loans - Average Recorded Investment and Interest Income Recognized (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Receivables [Abstract]
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 0

Loans - Collateral Dependent Lo

Loans - Collateral Dependent Loans (Details) $ in Thousands	Mar. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	$ 16,333
Management evaluated loan with amortized cost basis	250
Commercial Acquisition/Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	1,303
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	9,484
Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	1,331
Total Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	1,303
Senior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,479
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	11,551
Food and Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	736
Residential Real Estate Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,479
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	12,500
Real Estate [Member] | Commercial Acquisition/Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	1,303
Real Estate [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	5,965
Real Estate [Member] | Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	1,331
Real Estate [Member] | Total Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	1,303
Real Estate [Member] | Senior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,479
Real Estate [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	7,718
Real Estate [Member] | Food and Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	422
Real Estate [Member] | Residential Real Estate Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,479
Equipment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,833
Equipment [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,519
Equipment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	3,833
Equipment [Member] | Food and Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis	$ 314

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructuring and Loans Accounted for Under ASC Topic 310-30 Narratives (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)itemloan	Mar. 31, 2019USD ($)item
ASC 310-30
Debt Instrument [Line Items]
Amortized cost basis	$ 4,200
Effects of Coronavirus Disease [Member]
Debt Instrument [Line Items]
Number of restructured loans not identified as TDRs | loan	4
Loans modified and not identified as TDRs	$ 122
Troubled Debt Restructurings [Member]
Debt Instrument [Line Items]
Number of restructured loans | item	2
Amortized cost basis	$ 1,900
TDR's modified within the past year that defaulted on their restructured terms | item	5	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 800	$ 200

Loans - Additional Information

Loans - Additional Information Related to Accruing TDR's (Details) - Accruing TDR [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Loans [Line Items]
Amortized cost basis	$ 10,285	$ 6,885
Average year-to- date recorded investment	10,386	7,138
Unpaid principal balance	14,102	7,112
Unfunded commitments to fund TDRs	162	12
Commercial [Member]
Loans [Line Items]
Amortized cost basis	6,093	5,615
Average year-to- date recorded investment	6,155	5,788
Unpaid principal balance	6,781	5,714
Unfunded commitments to fund TDRs	150
Commercial Real Estate [Member]
Loans [Line Items]
Amortized cost basis	2,183	141
Average year-to- date recorded investment	2,208	172
Unpaid principal balance	4,428	192
Residential Real Estate Segment [Member]
Loans [Line Items]
Amortized cost basis	2,009	1,129
Average year-to- date recorded investment	2,023	1,178
Unpaid principal balance	2,893	1,206
Unfunded commitments to fund TDRs	$ 12	$ 12

Loans - Summary of Company's Ca

Loans - Summary of Company's Carrying Value of Non-Accrual TDR's (Details) - Non-Accruing TDR [Member] - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	$ 4,690	$ 4,854
Commercial [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	1,873	1,891
Commercial Real Estate [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	257	410
Residential Real Estate Segment [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	$ 2,560	$ 2,553

Allowance for Credit Losses - S

Allowance for Credit Losses - Summary of Company's Allowance for Loan Losses ("All") and Recorded Investment in Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 39,064
Provision	6,159	$ 1,534
Ending balance	50,956
Total Loans			$ 4,505,735	$ 4,415,406
Collective related allowance for loan losses for impaired loans	39,064		50,956	39,064
Provision for loan losses	6,159	1,534
Total Loans			4,505,735	4,415,406
Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	39,064	35,692
Charge-offs	(497)	(268)
Cumulative effect adjustments			5,836
Recoveries	144	97
Provision	6,409	1,534
Ending balance	50,956	37,055
Total Loans			4,505,735	4,415,406
Collective related allowance for loan losses for impaired loans	50,956	37,055	50,956	39,064
Provision for loan losses	6,409	1,534
Total Loans			4,505,735	4,415,406
Commercial Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	30,442	27,137
Charge-offs	(218)	(12)
Cumulative effect adjustments			(1,299)
Recoveries	91	27
Provision	1,541	923
Ending balance	30,557	28,075
Collective related allowance for loan losses for impaired loans	30,557	28,075	30,557	30,442
Provision for loan losses	1,541	923
Non Owner-Occupied [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,850	4,406
Cumulative effect adjustments			1,666
Recoveries		11
Provision	2,762	497
Ending balance	9,278	4,914
Collective related allowance for loan losses for impaired loans	9,278	4,914	9,278	4,850
Provision for loan losses	2,762	497
Residential Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,468	3,800
Charge-offs	(28)	(23)
Cumulative effect adjustments			5,314
Recoveries	5	13
Provision	1,937	(72)
Ending balance	10,696	3,718
Collective related allowance for loan losses for impaired loans	10,696	3,718	10,696	3,468
Provision for loan losses	1,937	(72)
Consumer Loan [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	304	349
Charge-offs	(251)	(233)
Cumulative effect adjustments			155
Recoveries	48	46
Provision	169	186
Ending balance	425	348
Collective related allowance for loan losses for impaired loans	425	348	$ 425	$ 304
Provision for loan losses	$ 169	$ 186

Allowance for Credit Losses - N

Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Allowance For Loan And Lease Losses [Line Items]
Accrued interest receivable	$ 19.8		$ 17.2
Originated and acquired loans [Member]
Allowance For Loan And Lease Losses [Line Items]
Charge-offs, net	$ 0.4	$ 0.2

Other Real Estate Owned - Summa

Other Real Estate Owned - Summary of Activity in OREO Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Real Estate [Roll Forward]
Beginning balance	$ 7,051	$ 9,394
Transfers from loan portfolio, at fair value	18	288
Impairments		(596)
Sales	(267)	(894)
Ending balance	$ 7,300	$ 10,596

Other Real Estate Owned - Narra

Other Real Estate Owned - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Real Estate Owned
OREO sales	$ 267	$ 894
Gain (loss) on OREO sales, net	$ (39)	$ 368

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)item	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Goodwill and Intangible Assets
Goodwill acquired	$ 115,027		$ 115,027
Goodwill Impairment	0		$ 0
Amortization of acquired identifiable intangibles	296	$ 296
Mortgage loans serviced	301,800	376,000
Mortgage service fees	200	300
Core Deposits
Goodwill and Intangible Assets
Amortization of acquired identifiable intangibles	$ 300	300
Core Deposits | Minimum
Goodwill and Intangible Assets
Amortization period	7 years
Core Deposits | Maximum
Goodwill and Intangible Assets
Amortization period	10 years
Mortgage servicing rights
Goodwill and Intangible Assets
Amortization of acquired identifiable intangibles	$ 210	$ 153
Mortgage servicing rights | Measurement Input, Discount Rate [Member] | Minimum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent)	0.095	0.095
Mortgage servicing rights | Measurement Input, Discount Rate [Member] | Maximum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent)	0.105	0.105
Mortgage servicing rights | Measurement Input, Constant Prepayment Rate [Member] | Minimum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent)	0.169	0.134
Mortgage servicing rights | Measurement Input, Constant Prepayment Rate [Member] | Maximum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent)	0.214	0.198

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Carrying Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Core Deposits
Carrying amount of intangible assets
Gross carrying amount	$ 48,834	$ 48,834
Accumulated amortization	(40,399)	(40,103)
Net carrying amount	8,435	8,731
Mortgage servicing rights
Carrying amount of intangible assets
Net carrying amount	$ 2,053	$ 2,630	$ 3,362	$ 3,556

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Summary of Estimated Future Amortization Expense (Details) $ in Thousands	Mar. 31, 2020USD ($)
Core Deposits
Estimated future amortization expense
For the nine months ending December 31, 2020	$ 887
For the years ending December 31, 2021	1,183
For the years ending December 31, 2022	1,127
For the years ending December 31, 2023	1,048
For the years ending December 31, 2024	1,048
Mortgage servicing rights
Estimated future amortization expense
For the nine months ending December 31, 2020	359
For the years ending December 31, 2021	395
For the years ending December 31, 2022	303
For the years ending December 31, 2023	232
For the years ending December 31, 2024	$ 178

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Changes in Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Changes in the mortgage servicing rights
Amortization	$ (296)	$ (296)
Mortgage servicing rights
Changes in the mortgage servicing rights
Beginning balance	2,630	3,556
Originations	142	13
Impairment	(509)	(54)
Amortization	(210)	(153)
Ending balance	2,053	3,362
Fair value of mortgage servicing rights	$ 2,053	$ 3,564

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Amount of repurchase agreements	$ 23.7		$ 56.9
Fair value of collateral	$ 13.8		7
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date, Last	2020
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	$ 1,000
FHLB advances	15
FHLB line of credit advances	326.5		192.7
Loans pledged	1,500		1,500
Interest expense related to FHLB advances	$ 0.9	$ 1.5
Maximum
Assets Sold under Agreements to Repurchase [Line Items]
Interest rate range of FHLB advances	2.33%
Federal Home Loan Bank of Des Moines [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 16.5		17.6
U.S. Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 38.2		$ 65.6

Regulatory Capital - Capital Ra

Regulatory Capital - Capital Ratio Requirements under Prompt Corrective Action or Other Regulatory Requirements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer	2.50%
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage Ratio	11.10%	11.00%
Common equity risk-based ratio	12.90%	13.20%
Risk-based capital Ratio	12.90%	13.20%
Total risk-based capital Ratio	13.80%	14.10%
Leverage Amount	$ 633,216	$ 640,440
Common equity risk-based amount	633,216	640,440
Risk-based capital amount	633,216	640,440
Total risk-based capital Amount	$ 679,976	$ 682,645
Required to be considered adequately capitalized Ratio, leverage ratio	4.00%	4.00%
Required to be considered adequately capitalized Ratio, risk-based common equity capital ratio	7.00%	7.00%
Required to be considered adequately capitalized Ratio, risk-based capital ratio	8.50%	8.50%
Required to be considered adequately capitalized Ratio, Total risk-based capital ratio	10.50%	10.50%
Required to be considered adequately capitalized leverage Amount	$ 229,316	$ 231,950
Required to be considered adequately capitalized common equity capital amount	344,510	405,912
Required to be considered adequately capitalized risk-based capital Amount	418,333	412,620
Required to be considered adequately capitalized Total risk-based capital Amount	$ 516,765	$ 509,707
NBH Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage Ratio	9.50%	9.10%
Common equity risk-based ratio	11.10%	10.90%
Risk-based capital Ratio	11.10%	10.90%
Total risk-based capital Ratio	12.10%	11.80%
Leverage Amount	$ 547,337	$ 528,028
Common equity risk-based amount	547,337	528,028
Risk-based capital amount	547,337	528,028
Total risk-based capital Amount	$ 594,097	$ 570,233
Required to be considered well capitalized Ratio, leverage ratio	5.00%	5.00%
Required to be considered adequately capitalized Ratio, risk-based common equity capital ratio	6.50%	6.50%
Required to be considered well capitalized Ratio, risk-based capital ratio	8.00%	8.00%
Required to be considered well capitalized Ratio, Total risk-based capital ratio	10.00%	10.00%
Required to be considered well capitalized leverage Amount	$ 286,928	$ 289,926
Required to be considered well capitalized common equity capital amount	319,675	376,903
Required to be considered well capitalized risk-based capital Amount	393,447	387,701
Required to be considered well capitalized Total risk-based capital Amount	$ 491,808	$ 484,626
Required to be considered adequately capitalized Ratio, leverage ratio	4.00%	4.00%
Required to be considered adequately capitalized Ratio, risk-based common equity capital ratio	7.00%	7.00%
Required to be considered adequately capitalized Ratio, risk-based capital ratio	8.50%	8.50%
Required to be considered adequately capitalized Ratio, Total risk-based capital ratio	10.50%	10.50%
Required to be considered adequately capitalized leverage Amount	$ 229,542	$ 231,940
Required to be considered adequately capitalized common equity capital amount	344,266	405,896
Required to be considered adequately capitalized risk-based capital Amount	418,037	411,932
Required to be considered adequately capitalized Total risk-based capital Amount	$ 516,399	$ 508,857

Revenue from Contracts with C_3

Revenue from Contracts with Clients - Non-interest income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from Contracts with Clients
Non-interest income	$ 23,532	$ 17,051
Loss (gain) on OREO sales, net	39	(368)
Service charges and other fees
Revenue from Contracts with Clients
Non-interest income	4,126	4,321
Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,513	3,428
In-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	8,178	8,271
Loss (gain) on OREO sales, net	(39)	368
Total Revenue	8,139	8,639
In-scope of Topic 606 | Service charges and other fees
Revenue from Contracts with Clients
Non-interest income	4,665	4,843
In-scope of Topic 606 | Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,513	3,428
Out-of-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	$ 15,354	$ 8,780

Stock-based Compensation and _3

Stock-based Compensation and Benefits - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock options [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Rights, Percentage	33.30%
Contractual term (in years)	10 years
Stock based compensation expense	$ 208,000	$ 47,000
Unrecognized compensation expense	$ 600,000
Unrecognized compensation cost, weighted-average period, years	1 year 9 months 18 days
Restricted Stock [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 500,000	200,000
Unrecognized compensation expense	$ 1,400,000
Unrecognized compensation cost, weighted-average period, years	1 year 9 months 18 days
Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock based compensation expense	$ 500,000	$ 200,000
Unrecognized compensation expense	$ 2,200,000
Unrecognized compensation cost, weighted-average period, years	1 year 6 months
Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member] | EPS target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards based on performance type	60.00%
Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member] | TSR target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards based on performance type	40.00%
Employee Stock [Member] | Employee Stock Purchase Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum stock purchases by employees, value	$ 25,000
Maximum stock purchases by employees (in shares)	2,000
Discount on purchase of common stock (as a percent)	90.00%
Offering period for employee stock purchases	6 months
Number of shares authorized	400,000
Shares available for issuance	317,198
Employees purchased shares (in shares)	8,890	6,201
Minimum | Stock options [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Minimum | Restricted Stock [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Minimum | Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial target awards	0.00%
Maximum | Stock options [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Maximum | Restricted Stock [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Maximum | Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial target awards	150.00%

Stock-based Compensation and _4

Stock-based Compensation and Benefits - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Options, beginning	657,114
Exercised, Options	(2,479,000)
Forfeited, Options	(2,326)
Outstanding Options, ending	652,309	657,114
Options fully vested and exercisable at end of period, Options	402,235
Options expected to vest, Options	633,925
Outstanding, Weighted average exercise price, beginning	$ 26.69
Exercised, Weighted average exercise price	20.18
Forfeited, Weighted average exercise price	32.01
Outstanding, Weighted average exercised price, ending	26.69	$ 26.69
Options fully vested and exercisable at end of period, Weighted average exercise price	22.31
Options expected to vest, Weighted average exercise price	$ 26.48
Outstanding, Weighted average remaining contractual term in years	6 years 2 months 1 day	6 years 4 months 28 days
Options fully vested and exercisable at end of period, weighted average remaining contractual term in years	4 years 9 months 3 days
Options expected to vest, Weighted average remaining contractual term in years	6 years 1 month 6 days
Outstanding, Aggregate intrinsic value, beginning	$ 5,626
Outstanding, Outstanding, Aggregate intrinsic value, beginning	1,438	$ 5,626
Aggregate intrinsic Value of Options fully vested and exercisable at end of period	1,438
Options expected to vest, Aggregate Intrinsic Value	$ 1,438

Stock-based Compensation and _5

Stock-based Compensation and Benefits - Summary of Restricted Stock Activity (Details)	3 Months Ended
	Mar. 31, 2020$ / sharesshares
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested Restricted shares, Beginning (in shares) | shares	122,198
Unvested Restricted shares, Forfeited (in shares) | shares	(1,575)
Unvested Restricted shares, Ending (in shares) | shares	120,623
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average grant-date fair value, Beginning (in dollars per share) | $ / shares	$ 34.19
Weighted average grant-date fair value, Forfeited (in dollars per share) | $ / shares	34.07
Weighted average grant-date fair value, Ending (in dollars per share) | $ / shares	$ 34.19
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested Restricted shares, Beginning (in shares) | shares	158,874
Unvested Restricted shares, Net adjustment due to performance (in shares) | shares	17,852
Unvested Restricted shares, Vested (in shares) | shares	(53,540)
Unvested Restricted shares, Forfeited (in shares) | shares	(328)
Unvested Restricted shares, Ending (in shares) | shares	122,858
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average grant-date fair value, Beginning (in dollars per share) | $ / shares	$ 31.19
Weighted average grant-date fair value, Net adjustment due to performance (in dollars per share) | $ / shares	33.22
Weighted average grant-date fair value, Vested (in dollars per share) | $ / shares	33.22
Weighted average grant-date fair value, Forfeited (in dollars per share) | $ / shares	30.38
Weighted average grant-date fair value, Ending (in dollars per share) | $ / shares	$ 30.61

Common Stock - Narrative (Detai

Common Stock - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Feb. 26, 2020
Schedule Of Common Stock [Line Items]
Shares outstanding	30,483,361	31,176,627
Remaining authorized amount	$ 43,100
Shares repurchased (shares)	734,117
Repurchase of shares	$ 19,476
Common Class A [Member]
Schedule Of Common Stock [Line Items]
Shares outstanding	30,483,361	31,176,627
Restricted issued but not yet vested, shares	120,623	122,198
New Board Authorized Share Repurchase Program
Schedule Of Common Stock [Line Items]
Stock repurchase program, authorized amount			$ 50,000
Board Authorized Share Repurchase Programs [Member]
Schedule Of Common Stock [Line Items]
Repurchase of shares	$ 12,600

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Earnings Per Share
Shares outstanding	30,483,361	30,958,581
Outstanding stock options to purchase common stock	652,309	1,110,984	657,114
Outstanding stock options to purchase common stock, per share	$ 26.69	$ 22.28	$ 26.69
Restricted shares outstanding	243,481	207,372

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Computation of Basic and Diluted Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share
Net income	$ 15,824	$ 18,922
Less: income allocated to participating securities	(24)	(18)
Income allocated to common shareholders	$ 15,800	$ 18,904
Weighted average shares outstanding for basic earnings per common share	31,157,476	30,961,187
Dilutive effect of equity awards	203,820	536,351
Weighted average shares outstanding for diluted earnings per common share	31,361,296	31,497,538
Basic earnings per share (in dollars per share)	$ 0.51	$ 0.61
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.60

Derivatives - FV of Derivatives

Derivatives - FV of Derivatives on the Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value		$ 1,171
Liability derivatives fair value	$ 46,573	13,537
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	28,635	10,519
Liability derivatives fair value	28,095	9,461
Other assets [Member] | Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value		1,171
Other assets [Member] | Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	21,853	9,004
Other assets [Member] | Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	6,737	1,499
Other assets [Member] | Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	45	16
Other liabilities [Member] | Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Liability derivatives fair value	46,573	13,537
Other liabilities [Member] | Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Liability derivatives fair value	21,894	9,021
Other liabilities [Member] | Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Liability derivatives fair value	166	141
Other liabilities [Member] | Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Liability derivatives fair value	$ 6,035	$ 299

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Hedged Loans	$ 413.4	$ 405.9
Cumulative fair value hedge adjustment	47.6	13.9
Termination value of derivatives in net liability position	70.6
Eligible collateral posted	77.4
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Notional amount	325.4	99.8
Forward Contract Notional [Member]
Derivative [Line Items]
Notional amount	287.5	181.5
Designated as Hedging Instrument [Member] | Interest rate swap derivatives [Member]
Derivative [Line Items]
Notional amount	410.3	403.7
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest rate swap derivatives [Member]
Derivative [Line Items]
Notional amount	$ 517	$ 478.9

Derivatives - Derivatives on th

Derivatives - Derivatives on the Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on derivatives	$ 1,773	$ 625
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on derivatives	(34,770)	10,136
Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on hedged items	33,778	(10,515)
Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Non-Interest expense [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on derivatives	(23)	273
Interest rate products [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest income [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on hedged items	33,778	(10,515)
Interest rate products [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Other Non-Interest income [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on derivatives	(34,770)	10,136
Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Mortgage banking income [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on derivatives	(5,707)	(800)
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Mortgage banking income [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on derivatives	$ 7,503	$ 1,152

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Total Unfunded Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Commitment And Contingencies [Line Items]
Total unfunded commitments	$ 826,938	$ 862,250
Commitments to fund loans [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	305,931	249,914
Unfunded Commitment Line Of Credit [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	510,529	600,407
Commercial And Standby Letters Of Credit [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	$ 10,478	$ 11,929

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Commitments and Contingencies
Mortgage Repurchase Reserve	$ 2.8	$ 2.6

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020
Fair Value Of Financial Instruments [Abstract]
Residential mortgage loans held for sale period	45 days
Interest Rate Lock Commitments, Average Percentage Of Estimated Pull Through Rate To Calculate Fair Value	85.9

Fair Value Measurements - Table

Fair Value Measurements - Tables of Financial Instruments Measured At Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 784,886	$ 766,799
Total liabilities at fair value	74,668	22,998
Loans held for sale member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	127,439	117,444
Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	388	372
Mortgage-Backed Securities (MBS) [Member] | Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	88,549	95,256
Mortgage-Backed Securities (MBS) [Member] | Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	539,875	542,037
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	778,104	765,284
Total liabilities at fair value	68,467	22,558
Level 2 [Member] | Loans held for sale member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	127,439	117,444
Level 2 [Member] | Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	388	372
Level 2 [Member] | Mortgage-Backed Securities (MBS) [Member] | Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	88,549	95,256
Level 2 [Member] | Mortgage-Backed Securities (MBS) [Member] | Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	539,875	542,037
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	6,782	1,515
Total liabilities at fair value	6,201	440
Interest rate swap derivatives [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	21,853	10,175
Total liabilities at fair value	68,467	22,558
Interest rate swap derivatives [Member] | Level 2 [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	21,853	10,175
Total liabilities at fair value	68,467	22,558
Mortgage banking derivatives | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	6,782	1,515
Total liabilities at fair value	6,201	440
Mortgage banking derivatives | Level 3 [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	6,782	1,515
Total liabilities at fair value	$ 6,201	$ 440

Fair Value Measurements - Tab_2

Fair Value Measurements - Table of Changes in Level 3 Financial Instruments (Details) - Derivative Financial Instruments Assets and Liabilities [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1,075
Gain included in earnings, net	1,796
Fees and costs included in earnings, net	(2,290)
Ending Balance	$ 581

Fair Value Measurements - Tab_3

Fair Value Measurements - Table of Valuation Techniques and Unobservable Inputs Used in Valuation of Financial Instruments Falling Within Level 3 of Fair Value Hierarchy (Details)	Mar. 31, 2020item
Minimum | Impaired Loans [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value of loans measurement input (as a percent)	0.03
Minimum | Mortgage servicing rights member | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Servicing assets measurement input (as a percent)	0.095
Minimum | Mortgage servicing rights member | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Servicing assets measurement input (as a percent)	16.9
Maximum | Impaired Loans [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value of loans measurement input (as a percent)	0.26
Maximum | Mortgage servicing rights member | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Servicing assets measurement input (as a percent)	0.105
Maximum | Mortgage servicing rights member | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Servicing assets measurement input (as a percent)	21.4
Weighted Average | Impaired Loans [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value of loans measurement input (as a percent)	0.191
Weighted Average | Mortgage servicing rights member | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Servicing assets measurement input (as a percent)	0.0958
Weighted Average | Mortgage servicing rights member | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Servicing assets measurement input (as a percent)	0.190

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)loan	Mar. 31, 2019USD ($)loan	Dec. 31, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 4,505,735		$ 4,415,406
Impairment on other real estate owned		$ 596
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated selling cost (as a percent)	6.00%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated selling cost (as a percent)	10.00%
Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated selling cost (as a percent)	10.00%
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonrecurring Loans Reserves	$ 1,300	$ 1,500
Number of Loans measured | loan	7	6
Loans	$ 5,200	$ 5,600

Fair Value Measurements - Input

Fair Value Measurements - Inputs Used to Determine Fair Values of Oreo are Considered Level 3 Inputs in Fair Value Hierarchy (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 784,886		$ 766,799
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	37,988	$ 45,499
Losses From Fair Value Changes	1,006	895
Impaired loans [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	35,935	32,743
Losses From Fair Value Changes	497	245
Other Real Estate Owned [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value		9,394
Losses From Fair Value Changes		596
Mortgage servicing rights member | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	2,053	3,362
Losses From Fair Value Changes	$ 509	$ 54

Fair Value Measurements - Trans

Fair Value Measurements - Transfer Between Hierarchy Levels (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Level 1 to Level 2 Transfer, Asset	$ 0
Level 2 to Level 1 Transfer, Asset	0	$ 0
Level 1 to Level 2 Transfer, Liability	0	0
Level 2 to Level 1 Transfer, Liability	0	0
Level 3 Transfer, Asset	0	0
Level 3 Transfer, Liability	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS:
Cash and cash equivalents	$ 133,926	$ 110,190
Investment securities available-for-sale (at fair value)	629,396	638,249
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	192,902	182,884
Non-marketable securities	29,948	29,751
Loans receivable	4,454,779	4,376,342
Total Loans	4,505,735	4,415,406
Loans held-for-sale	127,439	117,444
Accrued interest receivable	19,800	17,200
LIABILITIES:
Time deposits	1,050,981	1,058,153
Securities sold under agreements to repurchase	23,703	56,935
Federal Home Loan Bank advances	341,506	207,675
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	88,549	95,256
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	144,218	127,560
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	539,875	542,037
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	48,684	55,324
Other Securities [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	469	469
Municipal [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	503	487
Carrying Amount [Member] | Level 1 [Member]
ASSETS:
Cash and cash equivalents	133,926	110,190
Carrying Amount [Member] | Level 2 [Member]
ASSETS:
Non-marketable securities	29,948	29,751
Loans held-for-sale	127,439	117,444
Accrued interest receivable	22,028	19,157
LIABILITIES:
Deposit transaction accounts	3,690,875	3,678,979
Time deposits	1,050,981	1,058,153
Securities sold under agreements to repurchase	23,703	56,935
Federal Home Loan Bank advances	341,506	207,675
Accrued interest payable	9,562	9,328
Carrying Amount [Member] | Level 3 [Member]
ASSETS:
Total Loans	4,505,735	4,415,406
Carrying Amount [Member] | Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member] | Level 2 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	88,549	95,256
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	144,218	127,560
Carrying Amount [Member] | Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member] | Level 2 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	539,875	542,037
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	48,684	55,324
Carrying Amount [Member] | Other Securities [Member] | Level 3 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	469	469
Carrying Amount [Member] | Municipal [Member] | Level 2 [Member]
ASSETS:
Municipal obligations	388	372
Carrying Amount [Member] | Municipal [Member] | Level 3 [Member]
ASSETS:
Municipal obligations	115	115
Estimated Fair Value [Member] | Level 1 [Member]
ASSETS:
Cash and cash equivalents	133,926	110,190
Estimated Fair Value [Member] | Level 2 [Member]
ASSETS:
Non-marketable securities	29,948	29,751
Loans held-for-sale	127,439	117,444
Accrued interest receivable	22,028	19,157
LIABILITIES:
Deposit transaction accounts	3,690,875	3,678,979
Time deposits	1,059,344	1,058,354
Securities sold under agreements to repurchase	23,703	56,935
Federal Home Loan Bank advances	341,650	207,890
Accrued interest payable	9,562	9,328
Estimated Fair Value [Member] | Level 3 [Member]
ASSETS:
Total Loans	4,719,261	4,481,209
Estimated Fair Value [Member] | Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member] | Level 2 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	88,549	95,256
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	148,283	128,770
Estimated Fair Value [Member] | Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member] | Level 2 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	539,875	542,037
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	49,314	54,971
Estimated Fair Value [Member] | Other Securities [Member] | Level 3 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	469	469
Estimated Fair Value [Member] | Municipal [Member] | Level 2 [Member]
ASSETS:
Municipal obligations	388	372
Estimated Fair Value [Member] | Municipal [Member] | Level 3 [Member]
ASSETS:
Municipal obligations	115	115
Interest rate swap derivatives [Member] | Carrying Amount [Member] | Level 2 [Member]
ASSETS:
Derivative asset	21,853	10,175
LIABILITIES:
Derivative liability	68,467	22,558
Interest rate swap derivatives [Member] | Estimated Fair Value [Member] | Level 2 [Member]
ASSETS:
Derivative asset	21,853	10,175
LIABILITIES:
Derivative liability	68,467	22,558
Mortgage banking derivatives | Carrying Amount [Member] | Level 3 [Member]
ASSETS:
Derivative asset	6,782	1,515
LIABILITIES:
Derivative liability	6,201	440
Mortgage banking derivatives | Estimated Fair Value [Member] | Level 3 [Member]
ASSETS:
Derivative asset	6,782	1,515
LIABILITIES:
Derivative liability	$ 6,201	$ 440