National Bank (NBHC) 10-Q 9 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 07, 2019
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	NBHC
Entity Registrant Name	National Bank Holdings Corp
Entity Central Index Key	0001475841
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		30,992,140
Entity Current Reporting Status	Yes

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 104,758	$ 109,056
Interest bearing bank deposits	500	500
Cash and cash equivalents	105,258	109,556
Investment securities available-for-sale (at fair value)	749,537	791,102
Investment securities held-to-maturity (fair value of $219,607 and $230,926 at March 31, 2019 and December 31, 2018, respectively)	221,727	235,398
Non-marketable securities	24,574	27,555
Loans	4,246,941	4,092,308
Allowance for loan losses	(37,055)	(35,692)
Loans, net	4,209,886	4,056,616
Loans held for sale	59,324	48,120
Other real estate owned	9,394	10,596
Premises and equipment, net	109,594	109,986
Goodwill	115,027	115,027
Intangible assets, net	12,981	13,470
Other assets	185,364	159,240
Total assets	5,802,666	5,676,666
Liabilities:
Non-interest bearing demand deposits	1,172,683	1,072,029
Interest bearing demand deposits	696,332	688,255
Savings and money market	1,764,341	1,694,808
Time deposits	1,081,092	1,080,529
Total deposits	4,714,448	4,535,621
Securities sold under agreements to repurchase	59,543	66,047
Federal Home Loan Bank advances	228,421	301,660
Other liabilities	85,252	78,332
Total liabilities	5,087,664	4,981,660
Shareholders' equity:
Common stock, par value $0.01 per share: 400,000,000 shares authorized; 51,487,907 and 51,498,016 shares issued; 30,958,581 and 30,769,063 shares outstanding at March 31, 2019 and December 31, 2018, respectively	515	515
Additional paid-in capital	1,012,974	1,014,399
Retained earnings	120,879	106,990
Treasury stock of 20,421,540 and 20,582,459 shares at March 31, 2019 and December 31, 2018, respectively, at cost	(413,226)	(415,623)
Accumulated other comprehensive loss, net of tax	(6,140)	(11,275)
Total shareholders' equity	715,002	695,006
Total liabilities and shareholders' equity	$ 5,802,666	$ 5,676,666

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 219,607	$ 230,926
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	51,498,016
Common Stock, shares outstanding	30,958,581	30,769,063
Treasury stock, shares	20,421,540	20,582,459

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest and dividend income:
Interest and fees on loans	$ 52,775	$ 45,280
Interest and dividends on investment securities	6,012	6,526
Dividends on non-marketable securities	423	244
Interest on interest-bearing bank deposits	210	741
Total interest and dividend income	59,420	52,791
Interest expense:
Interest on deposits	6,615	4,634
Interest on borrowings	1,639	510
Total interest expense	8,254	5,144
Net interest income before provision for loan losses	51,166	47,647
Provision for loan losses	1,534	41
Net interest income after provision for loan losses	49,632	47,606
Non-interest income:
Mortgage banking income	6,937	7,971
Bank-owned life insurance income	421	452
Other non-interest income	1,883	1,150
OREO related income	61	390
Total non-interest income	17,051	17,835
Non-interest expense:
Salaries and benefits	27,890	30,672
Occupancy and equipment	6,882	7,955
Telecommunications and data processing	2,290	4,366
Marketing and business development	986	1,224
FDIC deposit insurance	498	753
Bank card expenses	810	2,136
Professional fees	814	2,819
Other non-interest expense	3,173	3,845
Problem asset workout	1,123	781
(Gain) loss on OREO sales, net	(368)	78
Core deposit intangible asset amortization	296	653
Total non-interest expense	44,394	55,282
Income before income taxes	22,289	10,159
Income tax expense	3,367	1,695
Net income	$ 18,922	$ 8,464
Income per share—basic (in dollars per share)	$ 0.61	$ 0.28
Income per share—diluted (in dollars per share)	$ 0.60	$ 0.27
Weighted average number of common shares outstanding:
Basic (Shares)	30,961,187	30,493,689
Diluted (Shares)	31,497,538	31,143,528
Service Charges and other fees
Non-interest income:
Non-interest income	$ 4,321	$ 4,510
Bank card fees
Non-interest income:
Non-interest income	$ 3,428	$ 3,362

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 18,922	$ 8,464
Securities available-for-sale:
Net unrealized gains (losses) arising during the period, net of tax (expense) benefit of ($1,706) and $2,301 for the three months ended March 31, 2019 and 2018, respectively	5,417	(6,780)
Less: amortization of net unrealized holding gains to income, net of tax benefit of $90 and $70 for the three months ended March 31, 2019 and 2018, respectively	(282)	(387)
Other comprehensive income (loss)	5,135	(7,167)
Comprehensive income	$ 24,057	$ 1,297

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Tax (expense) benefit on net unrealized gains arising during the period	$ (1,706)	$ 2,301
Tax (expense) benefit of amortization of net unrealized holding gains to income	$ 90	$ 70

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, 2017		$ 515	$ 970,668	$ 60,795	$ (493,329)	$ (6,242)	$ 532,407
Increase (Decrease) in Stockholders' Equity
Net income				8,464			8,464
Stock-based compensation			833				833
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net			(1,476)		5,319		3,843
Reissuance of treasury stock of 3,398,477 shares for acquisition of Peoples, Inc.			42,243		67,970		110,213
Cash dividends declared				(2,756)			(2,756)
Reclassification of certain tax effects from accumulated other comprehensive income	[1]			1,479		(1,479)
Cumulative effect adjustment	[2]			26			26
Other comprehensive income (loss)						(7,167)	(7,167)
Balance in the ending at Mar. 31, 2018		515	1,012,268	68,008	(420,040)	(14,888)	645,863
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	[3]			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
[1]	Related to the adoption of Accounting Standards Update No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.
[2]	Related to the adoption of Accounting Standards Update No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.
[3]	Related to the adoption of Accounting Standards Update No. 2016-02, Leases. Refer to note 2 - Recent Accounting Pronouncements of our consolidated financial statements for further details.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Gain on reissuance of treasury stock	$ 2,291	$ 3,566
Treasury Stock, shares, for Peoples acquisition		3,398,477
Cash dividends declared per share	$ 0.17	$ 0.09

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 18,922	$ 8,464
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	1,534	41
Depreciation and amortization	2,527	2,983
Current income tax receivable	2,968	(4,233)
Deferred income taxes	1,929	(609)
Net excess tax benefit on stock-based compensation	(753)	(371)
Discount accretion, net of premium amortization on securities	442	821
Loan accretion	(4,193)	(6,508)
Gain on sale of mortgages, net	(6,276)	(6,803)
Origination of loans held for sale, net of repayments	(176,105)	(219,584)
Proceeds from sales of loans held for sale	171,330	235,104
Bank-owned life insurance income	(421)	(452)
Gain on the sale of other real estate owned, net	(368)	78
Impairment on other real estate owned	596	38
Stock-based compensation	375	833
Operating lease payments	(1,406)
Acquisition-related costs		(7,957)
Increase in other assets	716	(5,630)
(Decrease) increase in other liabilities	(15,437)	14,294
Net cash provided by (used in) operating activities	(3,620)	10,509
Cash flows from investing activities:
Purchase of FHLB stock	(4,248)	(2,950)
Proceeds from redemption of FHLB stock	7,229	8,690
Proceeds from maturities of investment securities held-to-maturity	13,217	15,526
Proceeds from maturities of investment securities available-for-sale	48,328	55,152
Proceeds from sales of investment securities available-for-sale		33,202
Purchase of investment securities held-to-maturity		(40,735)
Purchase of investment securities available-for-sale		(42,199)
Net increase (decrease) in loans	(159,027)	9,135
Purchases of premises and equipment, net	(1,688)	(1,905)
Proceeds from sales of other real estate owned	1,262	36
Net cash activity from acquisition		68,984
Net cash (used in) provided by investing activities	(94,927)	102,936
Cash flows from financing activities:
Net increase (decrease) in deposits	178,826	(160)
(Decrease) increase in repurchase agreements	(6,504)	10,724
Advances from FHLB	319,041
FHLB repayments	(392,280)	(85,605)
Issuance of stock under purchase and equity compensation plans	(1,646)	(517)
Proceeds from exercise of stock options	2,221	4,360
Payment of dividends	(5,409)	(2,741)
Net cash provided by (used in) financing activities	94,249	(73,939)
(Decrease) increase in cash, cash equivalents and restricted cash	(4,298)	39,506
Cash, cash equivalents and restricted cash at beginning of the year	119,556	257,364
Cash, cash equivalents and restricted cash at end of period	115,258	296,870
Supplemental disclosure of cash flow information during the period:
Cash paid for interest	6,539	3,723
Net tax (payments) refunds	(86)	164
Supplemental schedule of non-cash activities:
Loans transferred to other real estate owned at fair value	288	127
Decrease in loans purchased but not settled	(7,974)	(15,068)
Loans transferred from loans held for sale to loans	198	878
Lease right-of-use assets obtained in exchange for operating lease liabilities	$ 30,474
Treasury stock reissued for acquisition		$ 110,213

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2019
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 104 banking centers, as of March 31, 2019, 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 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 for other-than-temporary impairment (“OTTI”), the valuation of stock-based compensation, the valuation of mortgage servicing rights, the fair values of financial instruments, the allowance for loan losses (“ALL”) 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, 2018 and are contained in the Company's Annual Report on Form 10-K

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
Recent Accounting Pronouncements
Recent Accounting Pronouncements	Note 2 Recent Accounting Pronouncements Leases —In February 2016, the FASB issued ASU 2016-02, Leases . The guidance in ASU 2016-02 supersedes the lease recognition requirements in ASC Topic 840, Leases . The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statements. ASU 2016-02 became effective for the Company on January 1, 2019 and initially required a transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. In July 2018, the Financial Accounting Standards Board issued ASU 2018-11 which, among other things, provides an additional transition method that allows entities to not apply the guidance in ASU 2016-02 in the comparative periods presented in the financial statements and instead recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. We elected to apply certain practical expedients provided under ASU 2016-02 whereby we will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for any existing leases. We also did not apply the recognition requirements of ASU 2016-02 to any short-term leases (as defined by related accounting guidance). The updates did not significantly change lease accounting requirements applicable to lessors and did not significantly impact our financial statements in relation to contracts whereby we act as a lessor. We applied the modified-retrospective transition approach prescribed by ASU 2018-11. Upon adoption of ASU 2016-02 and ASU 2018-11 on January 1, 2019, we recognized right-of-use assets and related lease liabilities totaling $30.5 million with a cumulative-effect adjustment to beginning retained earnings of $0.3 million. Refer to note 6 – Leases of our consolidated financial statements for further detail. Financial Instruments - Credit Losses —In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments . This update replaces the current incurred loss methodology for recognizing credit losses with a current expected credit loss model, which requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. This amendment broadens the information that an entity must consider in developing its expected credit loss estimates. Additionally, the update amends the accounting for credit losses for available-for-sale debt securities and purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. This update requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of a company’s loan portfolio. ASU 2016-13 becomes effective for us on January 1, 2020. We have formed a cross-functional working group, including our credit, finance, risk management, and enterprise technology departments, to address the adoption and implementation of ASU 2016-13. We are currently working through our implementation plan and are in the process of implementing a third-party vendor solution to assist us in the application of ASU 2016-13. The adoption of ASU 2016-13 could result in an increase in the allowance for loan losses as a result of changing from an “incurred loss” model, which encompasses allowances for current known and inherent losses within the portfolio, to an “expected loss” model, which encompasses allowances for losses expected to be incurred over the life of the portfolio. We are currently evaluating the potential impact of ASU 2016-13 on our financial statements. Other Pronouncements — The Company reviewed ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment and ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement and does not expect the adoption of these pronouncements to have a material impact on its financial statements.

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2019
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 $1.0 billion at March 31, 2019 and included $0.8 billion of available-for-sale securities and $0.2 billion of held-to-maturity securities. At December 31, 2018, investment securities totaled $1.0 billion and included $0.8 billion of available-for-sale securities and $0.2 billion of held-to-maturity securities. Available-for-sale At March 31, 2019 and December 31, 2018, the Company held $749.5 million and $791.1 million of available-for-sale investment securities, respectively. Available-for-sale securities are summarized as follows as of the dates indicated: March 31, 2019 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 $ 134,173 $ 1,269 $ (954) $ 134,488 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 625,776 1,675 (13,481) 613,970 Municipal securities 619 — (9) 610 Other securities 469 — — 469 Total investment securities available-for-sale $ 761,037 $ 2,944 $ (14,444) $ 749,537 December 31, 2018 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 $ 147,283 $ 1,232 $ (1,873) $ 146,642 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 661,354 1,056 (19,029) 643,381 Municipal securities 619 — (9) 610 Other securities 469 — — 469 Total investment securities available-for-sale $ 809,725 $ 2,288 $ (20,911) $ 791,102 At March 31, 2019 and December 31, 2018, 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 sponsored 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, 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 $ 235 $ — $ 86,197 $ (954) $ 86,432 $ (954) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 15,941 (9) 513,936 (13,472) 529,877 (13,481) Municipal securities — — 441 (9) 441 (9) Total $ 16,176 $ (9) $ 600,574 $ (14,435) $ 616,750 $ (14,444) December 31, 2018 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 $ 30,853 $ (392) $ 69,169 $ (1,481) $ 100,022 $ (1,873) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 127,767 (1,150) 454,662 (17,879) 582,429 (19,029) Municipal securities 441 (9) — — 441 (9) Total $ 159,061 $ (1,551) $ 523,831 $ (19,360) $ 682,892 $ (20,911) The unrealized losses in the Company's investment portfolio at March 31, 2019 were caused by changes in interest rates. The portfolio included 183 securities, having an aggregate fair value of $616.8 million, which were in an unrealized loss position at March 31, 2019, compared to 211 securities, with an aggregate fair value of $682.9 million at December 31, 2018. Management evaluated all of the available for sale securities in an unrealized loss position at March 31, 2019 and December 31, 2018 and concluded no OTTI existed. No OTTI charges were recorded during the three months ended March 31, 2019 and 2018. The Company has no intention to sell these securities before recovery of their amortized cost and believes it will not be required to sell the securities before the recovery of their amortized cost. 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 and FHLB, if needed. The fair value of available-for-sale investment securities pledged as collateral totaled $336.2 million and $318.1 million at March 31, 2019 and December 31, 2018, respectively. Certain investment securities may also be pledged as collateral for the line of credit at the FHLB; at March 31, 2019 or December 31, 2018, no securities were pledged for this purpose. Mortgage-backed securities do not have a single maturity date and actual maturities may differ from contractual maturities depending on the repayment characteristics and experience of the underlying financial instruments. As of March 31, 2019, municipal securities with an amortized cost and fair value of $0.2 million were due after one year through five years, while municipal securities with an amortized cost and fair value of $0.4 million were due after five years through ten years. Other securities of $0.5 million as of March 31, 2019, have no stated contractual maturity date. Held-to-maturity At March 31, 2019 and December 31, 2018, the Company held $221.7 million and $235.4 million of held-to-maturity investment securities, respectively. Held-to-maturity investment securities are summarized as follows as of the dates indicated: March 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 $ 147,221 $ 33 $ (938) $ 146,316 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 74,506 76 (1,291) 73,291 Total investment securities held-to-maturity $ 221,727 $ 109 $ (2,229) $ 219,607 December 31, 2018 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 $ 157,115 $ 2 $ (2,705) $ 154,412 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 78,283 — (1,769) 76,514 Total investment securities held-to-maturity $ 235,398 $ 2 $ (4,474) $ 230,926 The tables below summarize the held-to-maturity securities with unrealized losses as of the dates shown, along with the length of the impairment period: March 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 $ — $ — $ 141,907 $ (938) $ 141,907 $ (938) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — — 39,410 (1,291) 39,410 (1,291) Total $ — $ — $ 181,317 $ (2,229) $ 181,317 $ (2,229) December 31, 2018 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 $ 26,660 $ (381) $ 126,475 $ (2,324) $ 153,135 $ (2,705) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 35,235 (79) 41,279 (1,690) 76,514 (1,769) Total $ 61,895 $ (460) $ 167,754 $ (4,014) $ 229,649 $ (4,474) The held-to-maturity portfolio included 43 securities, having an aggregate fair value of $181.3 million, which were in an unrealized loss position at March 31, 2019, compared to 49 securities, with a fair value of $229.6 million, at December 31, 2018. The unrealized losses in the Company’s investments at March 31, 2019 and December 31, 2018 were caused by changes in interest rates. Management evaluated all of the held-to-maturity securities in an unrealized loss position and concluded that no OTTI existed at March 31, 2019 or December 31, 2018. The Company has no intention to sell these securities before recovery of their amortized cost and believes it will not be required to sell the securities before the recovery of their amortized cost. The carrying value of held-to-maturity investment securities pledged as collateral totaled $128.9 million and $133.1 million at March 31, 2019 and December 31, 2018, respectively. Actual maturities of mortgage-backed securities may differ from scheduled maturities depending on the repayment characteristics and experience of the underlying financial instruments.

Loans

Loans	3 Months Ended
	Mar. 31, 2019
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. The tables below show the loan portfolio composition including carrying value by segment of originated and acquired loans and loans accounted for under ASC 310-30, Receivables—Loans and Debt Securities Acquired with Deteriorated Credit Quality , as of the dates shown. The carrying value of originated and acquired loans is net of discounts, fees, cost and fair value marks of $10.1 million and $10.2 million as of March 31, 2019 and December 31, 2018, respectively. March 31, 2019 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 2,737,005 $ 19,139 $ 2,756,144 Commercial real estate non-owner occupied 609,076 36,878 645,954 Residential real estate 815,144 7,508 822,652 Consumer 22,189 2 22,191 Total $ 4,183,414 $ 63,527 $ 4,246,941 December 31, 2018 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 2,624,173 $ 20,398 $ 2,644,571 Commercial real estate non-owner occupied 551,819 40,393 592,212 Residential real estate 820,820 9,995 830,815 Consumer 24,617 93 24,710 Total $ 4,021,429 $ 70,879 $ 4,092,308 Delinquency for originated and acquired loans is shown in the following tables at March 31, 2019 and December 31, 2018: March 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 Originated and acquired loans: Commercial: Commercial and industrial $ 3,388 $ 13 $ 6,136 $ 9,537 $ 2,010,349 $ 2,019,886 Owner occupied commercial real estate 124 530 6,710 7,364 421,359 428,723 Food and agriculture 288 — 759 1,047 231,981 233,028 Energy — — 804 804 54,564 55,368 Total commercial 3,800 543 14,409 18,752 2,718,253 2,737,005 Commercial real estate non-owner occupied: Construction 355 — 1,208 1,563 92,767 94,330 Acquisition/development 35 725 115 875 17,493 18,368 Multifamily — — — — 60,635 60,635 Non-owner occupied 199 — 897 1,096 434,647 435,743 Total commercial real estate 589 725 2,220 3,534 605,542 609,076 Residential real estate: Senior lien 1,398 91 8,768 10,257 707,162 717,419 Junior lien 416 — 832 1,248 96,477 97,725 Total residential real estate 1,814 91 9,600 11,505 803,639 815,144 Consumer 42 — 81 123 22,066 22,189 Total originated and acquired loans $ 6,245 $ 1,359 $ 26,310 $ 33,914 $ 4,149,500 $ 4,183,414 December 31, 2018 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 Originated and acquired loans: Commercial: Commercial and industrial $ 495 $ 74 $ 5,510 $ 6,079 $ 1,925,068 $ 1,931,147 Owner occupied commercial real estate 893 — 6,931 7,824 413,842 421,666 Food and agriculture 141 125 768 1,034 221,122 222,156 Energy — — 742 742 48,462 49,204 Total commercial 1,529 199 13,951 15,679 2,608,494 2,624,173 Commercial real estate non-owner occupied: Construction — — 1,208 1,208 93,646 94,854 Acquisition/development — — 121 121 19,529 19,650 Multifamily — — — — 56,685 56,685 Non-owner occupied 328 132 572 1,032 379,598 380,630 Total commercial real estate 328 132 1,901 2,361 549,458 551,819 Residential real estate: Senior lien 2,106 548 7,790 10,444 712,592 723,036 Junior lien 556 — 772 1,328 96,456 97,784 Total residential real estate 2,662 548 8,562 11,772 809,048 820,820 Consumer 91 16 42 149 24,468 24,617 Total originated and acquired loans $ 4,610 $ 895 $ 24,456 $ 29,961 $ 3,991,468 $ 4,021,429 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. Pooled loans accounted for under ASC 310-30 that are 90 days or more past due and still accreting are generally considered to be performing and therefore are not included in the tables above. Non-accrual loans include non-accrual loans and troubled debt restructurings on non-accrual status. Non-accrual originated and acquired loans totaled $26.3 million at March 31, 2019, increasing $1.9 million, or 7.6% from December 31, 2018. 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”. A description of the general characteristics of the risk grades is set forth in the Company’s 2018 Annual Report on Form 10-K Credit exposure for all loans as determined by the Company’s internal risk rating system was as follows at March 31, 2019 and December 31, 2018, respectively: March 31, 2019 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,980,564 $ 19,051 $ 18,934 $ 1,337 $ 2,019,886 Owner occupied commercial real estate 397,240 19,941 11,457 85 428,723 Food and agriculture 230,558 1,220 1,218 32 233,028 Energy 54,564 — 804 — 55,368 Total commercial 2,662,926 40,212 32,413 1,454 2,737,005 Commercial real estate non-owner occupied: Construction 92,690 432 1,208 — 94,330 Acquisition/development 17,486 767 115 — 18,368 Multifamily 60,119 516 — — 60,635 Non-owner occupied 419,021 15,122 1,563 37 435,743 Total commercial real estate 589,316 16,837 2,886 37 609,076 Residential real estate: Senior lien 704,303 3,455 9,661 — 717,419 Junior lien 96,343 417 965 — 97,725 Total residential real estate 800,646 3,872 10,626 — 815,144 Consumer 22,108 — 81 — 22,189 Total originated and acquired loans $ 4,074,996 $ 60,921 $ 46,006 $ 1,491 $ 4,183,414 Loans accounted for under ASC 310-30: Commercial $ 16,452 $ 518 $ 2,169 $ — $ 19,139 Commercial real estate non-owner occupied 35,839 242 797 — 36,878 Residential real estate 5,243 849 1,416 — 7,508 Consumer 2 — — — 2 Total loans accounted for under ASC 310-30 $ 57,536 $ 1,609 $ 4,382 $ — $ 63,527 Total loans $ 4,132,532 $ 62,530 $ 50,388 $ 1,491 $ 4,246,941 December 31, 2018 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,890,710 $ 16,531 $ 22,919 $ 987 $ 1,931,147 Owner occupied commercial real estate 393,404 16,349 11,828 85 421,666 Food and agriculture 220,004 1,260 847 45 222,156 Energy 48,462 — 742 — 49,204 Total commercial 2,552,580 34,140 36,336 1,117 2,624,173 Commercial real estate non-owner occupied: Construction 92,731 915 1,208 — 94,854 Acquisition/development 19,529 — 121 — 19,650 Multifamily 56,685 — — — 56,685 Non-owner occupied 355,776 23,243 1,611 — 380,630 Total commercial real estate 524,721 24,158 2,940 — 551,819 Residential real estate: Senior lien 710,972 3,571 8,493 — 723,036 Junior lien 96,456 415 913 — 97,784 Total residential real estate 807,428 3,986 9,406 — 820,820 Consumer 24,575 — 42 — 24,617 Total originated and acquired loans $ 3,909,304 $ 62,284 $ 48,724 $ 1,117 $ 4,021,429 Loans accounted for under ASC 310-30: Commercial $ 17,579 $ 537 $ 2,282 $ — $ 20,398 Commercial real estate non-owner occupied 39,322 246 825 — 40,393 Residential real estate 7,484 908 1,598 — 9,990 Consumer — — 98 — 98 Total loans accounted for under ASC 310-30 $ 64,385 $ 1,691 $ 4,803 $ — $ 70,879 Total loans $ 3,973,689 $ 63,975 $ 53,527 $ 1,117 $ 4,092,308 Impaired Loans Loans are considered to be impaired when it is probable that the Company will not be able to collect all amounts due in accordance with the contractual terms of the loan agreement. Impaired loans are comprised of originated and acquired 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 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. At March 31, 2019 and December 31, 2018, the Company’s recorded investment in impaired loans were $32.7 million and $31.1 million, respectively, of which $2.2 million and $4.1 million, respectively, were accruing TDRs. Impaired loans had a collective related allowance for loan losses allocated to them of $1.5 million and $1.2 million at March 31, 2019 and December 31, 2018, respectively. Additional information regarding impaired loans at March 31, 2019 and December 31, 2018 is set forth in the table below: March 31, 2019 December 31, 2018 Allowance Allowance Unpaid for loan Unpaid for loan principal Recorded losses principal Recorded losses balance investment allocated balance investment allocated With no related allowance recorded: Commercial: Commercial and industrial $ 4,558 $ 3,173 $ — $ 4,374 $ 3,029 $ — Owner occupied commercial real estate 6,975 6,405 — 7,130 6,609 — Food and agriculture 1,468 1,220 — 1,468 1,260 — Energy 5,429 804 — 5,366 742 — Total commercial 18,430 11,602 — 18,338 11,640 — Commercial real estate non-owner occupied: Construction 1,435 1,208 — 1,435 1,208 — Acquisition/development 377 115 — 378 121 — Multifamily — — — — — — Non-owner occupied 642 546 — 641 547 — Total commercial real estate 2,454 1,869 — 2,454 1,876 — Residential real estate: Senior lien 4,667 4,310 — 4,229 3,814 — Junior lien 430 358 — 409 341 — Total residential real estate 5,097 4,668 — 4,638 4,155 — Consumer 86 81 — 46 42 — Total impaired loans with no related allowance recorded $ 26,067 $ 18,220 $ — $ 25,476 $ 17,713 $ — With a related allowance recorded: Commercial: Commercial and industrial $ 7,736 $ 5,109 $ 1,348 $ 7,252 $ 4,627 $ 996 Owner occupied commercial real estate 1,317 1,115 90 1,362 1,169 90 Food and agriculture 997 960 33 883 845 46 Energy — — — — — — Total commercial 10,050 7,184 1,471 9,497 6,641 1,132 Commercial real estate non-owner occupied: Construction — — — — — — Acquisition/development — — — — — — Multifamily — — — — — — Non-owner occupied 620 561 39 313 254 2 Total commercial real estate 620 561 39 313 254 2 Residential real estate: Senior lien 6,492 5,582 28 6,032 5,178 27 Junior lien 1,320 1,196 8 1,408 1,293 8 Total residential real estate 7,812 6,778 36 7,440 6,471 35 Consumer — — — — — — Total impaired loans with a related allowance recorded $ 18,482 $ 14,523 $ 1,546 $ 17,250 $ 13,366 $ 1,169 Total impaired loans $ 44,549 $ 32,743 $ 1,546 $ 42,726 $ 31,079 $ 1,169 The table below shows additional information regarding the average recorded investment and interest income recognized on impaired loans for the periods presented: For the three months ended March 31, 2019 March 31, 2018 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 3,189 $ 12 $ 5,534 $ 83 Owner occupied commercial real estate 6,425 3 7,487 18 Food and agriculture 1,220 1 1,259 6 Energy 777 — 2,353 20 Total commercial 11,611 16 16,633 127 Commercial real estate non-owner occupied: Construction 1,208 — — — Acquisition/development 117 — 886 — Multifamily — — — — Non-owner occupied 546 — 876 4 Total commercial real estate 1,871 — 1,762 4 Residential real estate: Senior lien 4,325 2 1,612 — Junior lien 363 — 305 — Total residential real estate 4,688 2 1,917 — Consumer 11 — 14 — Total impaired loans with no related allowance recorded $ 18,181 $ 18 $ 20,326 $ 131 With a related allowance recorded: Commercial: Commercial and industrial $ 5,113 $ — $ 4,339 $ — Owner occupied commercial real estate 1,125 4 1,265 5 Food and agriculture 961 — 2,126 1 Energy — — — — Total commercial 7,199 4 7,730 6 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily — — 29 — Non-owner occupied 566 9 196 2 Total commercial real estate 566 9 225 2 Residential real estate: Senior lien 5,629 25 5,601 13 Junior lien 1,205 40 1,151 9 Total residential real estate 6,834 65 6,752 22 Consumer 72 — 24 — Total impaired loans with a related allowance recorded $ 14,671 $ 78 $ 14,731 $ 30 Total impaired loans $ 32,852 $ 96 $ 35,057 $ 161 Interest income recognized on impaired loans noted in the tables above primarily represents interest earned on accruing TDRs. Interest income recognized on impaired loans during the three months ended March 31, 2019 and 2018 was $0.1 million and $0.2 million, respectively. 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, 2019, the Company restructured four loans with a recorded investment of $0.4 million to facilitate repayment. All of the loan modifications were a reduction of the principal payment, a reduction in interest rate, or an extension of term. Loan modifications to loans accounted for under ASC 310-30 are not considered TDRs. The tables below provide additional information related to accruing TDRs at March 31, 2019 and December 31, 2018: March 31, 2019 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 941 $ 943 $ 1,061 $ 150 Commercial real estate non-owner occupied 195 198 240 — Residential real estate 1,071 1,079 1,078 12 Consumer — — — — Total $ 2,207 $ 2,220 $ 2,379 $ 162 December 31, 2018 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 2,730 $ 2,827 $ 3,155 $ — Commercial real estate non-owner occupied 229 260 280 — Residential real estate 1,114 1,163 1,121 12 Consumer — — — — Total $ 4,073 $ 4,250 $ 4,556 $ 12 The following table summarizes the Company’s carrying value of non-accrual TDRs as of March 31, 2019 and December 31, 2018: March 31, 2019 December 31, 2018 Commercial $ 1,667 $ 1,854 Commercial real estate non-owner occupied — — Residential real estate 1,828 1,584 Consumer — — Total non-accruing TDRs $ 3,495 $ 3,438 At March 31, 2019 and December 31, 2018, the Company had $2.2 million and $4.1 million, respectively, of accruing TDRs that had been restructured from the original terms in order to facilitate repayment. Non-accruing TDRs totaled $3.5 million as of March 31, 2019 and increased $0.1 million from December 31, 2018. 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 two TDRs totaling $0.2 million that were modified within the past twelve months and had defaulted on their restructured terms during the three months ended March 31, 2019. During the three months ended March 31, 2018, the Company had one TDR that was modified within the past twelve months and had defaulted on its 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 loan losses related to troubled debt restructurings 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. Loans accounted for under ASC 310-30 Loan pools accounted for under ASC Topic 310-30 are periodically remeasured to determine expected future cash flows. In determining the expected cash flows, the timing of cash flows and prepayment assumptions for smaller homogeneous loans are based on statistical models that take into account factors such as the loan interest rate, credit profile of the borrowers, the years in which the loans were originated, and whether the loans are fixed or variable rate loans. Prepayments may be assumed on loans if circumstances specific to that loan warrant a prepayment assumption. The remeasurement of loans accounted for under ASC 310-30 resulted in the following changes in the carrying amount of accretable yield during the three months ended March 31, 2019 and 2018: March 31, 2019 March 31, 2018 Accretable yield beginning balance $ 35,901 $ 46,568 Reclassification from non-accretable difference 1,524 5,409 Reclassification to non-accretable difference (421) (1,390) Accretion (3,687) (5,394) Accretable yield ending balance $ 33,317 $ 45,193 Below is the composition of the net book value for loans accounted for under ASC 310-30 at March 31, 2019 and December 31, 2018: March 31, 2019 December 31, 2018 Contractual cash flows $ 409,942 $ 420,994 Non-accretable difference (313,098) (314,214) Accretable yield (33,317) (35,901) Loans accounted for under ASC 310-30 $ 63,527 $ 70,879

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Allowance for Loan Losses	Note 5 Allowance for Loan Losses The tables below detail the Company’s allowance for loan losses and recorded investment in loans as of and for the three months ended March 31, 2019 and 2018: 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 Originated and acquired beginning balance 26,946 4,406 3,760 349 35,461 Charge-offs (12) — (23) (233) (268) Recoveries 27 11 13 46 97 Provision 933 497 (66) 186 1,550 Originated and acquired ending balance 27,894 4,914 3,684 348 36,840 ASC 310-30 beginning balance 191 — 40 — 231 Charge-offs — — — — — Recoveries — — — — — Recoupment (10) — (6) — (16) ASC 310-30 ending balance 181 — 34 — 215 Ending balance $ 28,075 $ 4,914 $ 3,718 $ 348 $ 37,055 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 1,471 $ 39 $ 36 $ — $ 1,546 Originated and acquired loans collectively evaluated for impairment 26,423 4,875 3,648 348 35,294 ASC 310-30 loans 181 — 34 — 215 Total ending allowance balance $ 28,075 $ 4,914 $ 3,718 $ 348 $ 37,055 Loans: Originated and acquired loans individually evaluated for impairment $ 18,786 $ 2,430 $ 4,583 $ 6,944 $ 32,743 Originated and acquired loans collectively evaluated for impairment 2,718,219 606,646 810,561 15,245 4,150,671 ASC 310-30 loans 19,139 36,878 7,508 2 63,527 Total loans $ 2,756,144 $ 645,954 $ 822,652 $ 22,191 $ 4,246,941 Three months ended March 31, 2018 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 21,385 $ 5,609 $ 3,965 $ 305 $ 31,264 Originated and acquired beginning balance 21,340 5,583 3,965 305 31,193 Charge-offs (437) — — (279) (716) Recoveries 42 — 2 53 97 Provision 540 (712) (39) 211 — Originated and acquired ending balance 21,485 4,871 3,928 290 30,574 ASC 310-30 beginning balance 45 26 — — 71 Charge-offs — — — — — Recoveries — — — — — Provision (recoupment) 48 (7) — — 41 ASC 310-30 ending balance 93 19 — — 112 Ending balance $ 21,578 $ 4,890 $ 3,928 $ 290 $ 30,686 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 1,185 $ 2 $ 31 $ — $ 1,218 Originated and acquired loans collectively evaluated for impairment 20,300 4,868 3,897 290 29,355 ASC 310-30 loans 93 20 — — 113 Total ending allowance balance $ 21,578 $ 4,890 $ 3,928 $ 290 $ 30,686 Loans: Originated and acquired loans individually evaluated for impairment $ 24,175 $ 1,901 $ 8,558 $ 38 $ 34,672 Originated and acquired loans collectively evaluated for impairment 2,057,022 633,537 838,597 26,197 3,555,353 ASC 310-30 loans 24,702 75,277 12,000 330 112,309 Total loans $ 2,105,899 $ 710,715 $ 859,155 $ 26,565 $ 3,702,334 In evaluating the loan portfolio for an appropriate ALL level, non-impaired originated and acquired 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 applying loss ratios and determining applicable subjective adjustments to the ALL. The application of subjective adjustments was based upon qualitative risk factors, including economic trends and conditions, industry conditions, asset quality, loss trends, lending management, portfolio growth and loan review/internal audit results. Net charge-offs on originated and acquired loans during the three months ended March 31, 2019 were $0.2 million. Management’s evaluation of credit quality resulted in provision for originated and acquired loan losses of $1.6 million during the three months ended March 31, 2019. No provision was recorded for loan losses on originated and acquired loans during the three months ended March 31, 2018. During the three months ended March 31, 2019 and 2018, the Company re-estimated the expected cash flows of the loan pools accounted for under ASC 310-30. The remeasurement during the three months ended March 31, 2019 resulted in a net recoupment of $16 thousand. The remeasurement during the three months ended March 31, 2018 resulted in a net provision of $41 thousand.

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases
Leases	Note 6 Leases The Company adopted ASU 2016-02, Leases (Topic 842), on January 1, 2019. As a result of the adoption, the Company recorded lease right-of-use (“ROU”) assets and lease liabilities of $30.5 million with a cumulative effect adjustment to beginning retained earnings of $0.3 million. As of March 31, 2019, right-of-use lease assets and related lease liabilities totaled $29.4 million and were included within other assets and other liabilities, respectively, on the consolidated statements of financial condition. The ROU assets represent the Company’s right to use, or control the use of, an underlying asset for the lease term and the lease liabilities represent the Company’s obligation to make lease payments arising from the lease terms. The updates did not significantly change lease accounting requirements applicable to lessors and did not significantly impact our financial statements in relation to contracts whereby we act as a lessor. The Company has operating leases for banking centers, corporate offices and ATMs, with remaining lease terms ranging from one year to 9 years. The Company only included reasonably certain renewal options in the lease terms. The weighted-average remaining lease term for our operating leases was 5.3 years at March 31, 2019. As of March 31, 2019, the weighted-average discount rate was 3.42%, utilizing the Company’s incremental FHLB borrowing rate for borrowings of a similar term at the date of lease commencement. Rent expense totaled $1.4 million for the three months ended March 31, 2019 and was recorded within occupancy and equipment on the consolidated statements of operations. Lease payments do not include non-lease components such as real estate taxes, insurance, and common area maintenance. Below is a summary of undiscounted future minimum lease payments as of March 31, 2019 per ASC Topic 842, Leases : Amount For the nine months ending December 31, 2019 $ 4,295 For the year ending December 31, 2020 5,172 For the year ending December 31, 2021 4,843 For the year ending December 31, 2022 4,324 For the year ending December 31, 2023 3,921 Thereafter 16,570 Total lease payments 39,125 Less: Imputed interest 9,719 Present value of operating lease liabilities $ 29,406 Below is a summary of undiscounted future minimum lease payments as of December 31, 2018 per ASC Topic 840, Leases : Years ending December 31, Amount 2019 $ 3,092 2020 2,981 2021 3,091 2022 3,052 2023 2,047 Thereafter 10,163 Total $ 24,426

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2019
FDIC Loss-Sharing Related
Other Real Estate Owned	Note 7 Other Real Estate Owned A summary of the activity in the OREO balances during the three months ended March 31, 2019 and 2018 is as follows: For the three months ended March 31, 2019 2018 Beginning balance $ 10,596 $ 10,491 Acquired through acquisition — 1,409 Transfers from loan portfolio, at fair value 288 127 Impairments (596) (38) Sales (894) (114) Ending balance $ 9,394 $ 11,875 OREO totaled $9.4 million at March 31, 2019 and decreased $1.2 million from December 31, 2018. During the three months ended March 31, 2019, the Company sold $0.9 million of OREO. OREO net gains of $0.4 million and net losses of $0.1 million were included in the consolidated statement of operations for the three months ended March 31, 2019 and 2018, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets
Goodwill and Intangible Assets	Note 8 Goodwill and Intangible Assets Goodwill and core deposit intangible In connection with all of our acquisitions, the Company recorded goodwill of $115.0 million and core deposit intangible assets of $48.8 million. The 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, 2019 or the year ended December 31, 2018. The gross carrying amount of the core deposit intangibles and the associated accumulated amortization at March 31, 2019 and December 31, 2018, are presented as follows: March 31, 2019 December 31, 2018 Gross Net Gross Net carrying Accumulated carrying carrying Accumulated carrying amount amortization amount amount amortization amount Core deposit intangible $ 48,834 $ 39,215 $ 9,619 $ 48,834 $ 38,920 $ 9,914 The Company is amortizing the core deposit intangibles from acquisitions on a straight line basis over 7-10 years from the date of the respective acquisitions, which represents the expected useful life of the assets. The Company recognized core deposit intangible amortization expense of $0.3 million and $0.7 million during the three months ended March 31, 2019 and 2018, respectively. The following table shows the estimated future amortization expense for the core deposit intangibles as of March 31, 2019: Years ending December 31, Amount For the nine months ending December 31, 2019 $ 887 For the year ending December 31, 2020 1,183 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 Mortgage servicing rights Mortgage servicing rights 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 $376.0 million and $441.0 million at March 31, 2019 and 2018, respectively. Below are the changes in the mortgage servicing rights for the periods presented: For the three months ended March 31, 2019 2018 Beginning balance $ 3,556 $ — Acquired through acquisition — 4,301 Originations 13 — Impairment (54) — Amortization (153) (171) Ending balance $ 3,362 $ 4,130 Fair value of mortgage servicing rights 3,564 4,712 The fair value of mortgage servicing rights 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 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 $0.3 million and $0.3 million for the three months ended March 31, 2019 and 2018, respectively. Mortgage servicing rights are evaluated, and impairment is recognized to the extent fair value is less than the carrying amount. The Company evaluates impairment by type (FHLMC, FNMA, GNMA and FHLB) and interest rate. The Company is amortizing the mortgage servicing rights in proportion to and over the period of the estimated net servicing income of the underlying loans. The Company recognized mortgage servicing rights amortization expense of $0.2 million and $0.2 million for the three months ended March 31, 2019 and 2018, respectively. The following table shows the estimated future amortization expense for the mortgage servicing rights as of March 31, 2019: Years ending December 31, Amount For the nine months ending December 31, 2019 $ 449 For the year ending December 31, 2020 519 For the year ending December 31, 2021 427 For the year ending December 31, 2022 351 For the year ending December 31, 2023 288

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2019
Disclosure of Repurchase Agreements [Abstract]
Borrowings	Note 9 Borrowings The company enters into repurchase agreements to facilitate the needs of its clients. As of March 31, 2019 and December 31, 2018, the Company sold securities under agreements to repurchase totaling $59.5 million and $66.0 million, respectively, and none were for periods longer than one day. The Company pledged mortgage-backed securities with a fair value of approximately $72.9 million and $73.9 million as of March 31, 2019 and December 31, 2018, 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, 2019 and December 31, 2018, the Company had $11.5 million and $5.9 million 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 $1.1 billion at March 31, 2019. At March 31, 2019 and December 31, 2018, the Bank had $161.1 million and $234.3 million in line of credit advances from the FHLB, respectively, that matured within a day. At March 31, 2019 and December 31, 2018, the Bank had $67.3 million and $67.3 million in term advances from the FHLB, respectively. The term advances have fixed interest rates of 1.55%-2.33%, with maturity dates of 2019 - 2020. The Bank had investment securities pledged as collateral for FHLB advances in the amount of $16.4 million at March 31, 2019 and $16.0 million at December 31, 2018. Loans pledged were $1.6 billion at March 31, 2019 and $1.6 billion at December 31, 2018. Interest expense related to FHLB advances totaled $1.5 million and $460 thousand for the three months ended March 31, 2019 and 2018, respectively.

Regulatory Capital

Regulatory Capital	3 Months Ended
	Mar. 31, 2019
Regulatory Capital
Regulatory Capital	Note 10 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. The Basel III rules, effective January 1, 2015, changed the components of regulatory capital, changed the way in which risk ratings are assigned to various categories of bank assets and defined a new Tier 1 common risk-based ratio. In addition, a capital conservation buffer requirement, which was fully phased in on January 1, 2019, added a 2.5% capital requirement above existing regulatory minimum ratios. Under the Basel III requirements, at March 31, 2019 and December 31, 2018, the Company and the Bank met all capital requirements and the Bank had regulatory capital ratios in excess of the levels established for well-capitalized institutions, as detailed in the tables below. March 31, 2019 Required to be Required to be well capitalized under considered prompt corrective adequately Actual action provisions capitalized Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: Consolidated $ 595,782 N/A N/A $ 224,123 NBH Bank 499,314 $ 279,602 223,682 Common equity tier 1 risk-based capital: Consolidated $ 595,782 N/A N/A $ 392,215 NBH Bank 499,314 $ 363,483 391,443 Tier 1 risk-based capital ratio: Consolidated $ 595,782 N/A N/A $ 394,452 NBH Bank 499,314 $ 370,298 393,441 Total risk-based capital ratio: Consolidated $ 636,902 N/A N/A $ 487,264 NBH Bank 540,434 $ 462,872 486,016 December 31, 2018 Required to be Required to be well capitalized under considered prompt corrective adequately Actual action provisions capitalized Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: Consolidated $ 580,504 N/A N/A $ 220,988 NBH Bank 498,283 $ 275,703 220,563 Common equity tier 1 risk-based capital: Consolidated $ 580,504 N/A N/A $ 386,728 NBH Bank 498,283 $ 358,414 385,984 Tier 1 risk-based capital ratio: Consolidated $ 580,504 N/A N/A $ 382,306 NBH Bank 498,283 $ 358,938 381,372 Total risk-based capital ratio: Consolidated $ 620,275 N/A N/A $ 472,261 NBH Bank 538,054 $ 448,672 471,106 (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, 2019
Revenue from Contracts with Clients
Revenue from Contracts with Clients	Note 11 Revenue from Contracts with Clients The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers . Substantially all of the Company’s revenue is generated from contracts with clients. Topic 606 is applicable to non-interest revenue streams such as deposit related fees, interchange fees and merchant income. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain non-interest income streams such as fees associated with mortgage servicing rights, financial guarantees and derivatives are also not in scope of the new guidance. Non-interest revenue streams in-scope of Topic 606 are discussed below. 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 wire transfers, bill pay service, cashier’s checks, and other services. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees are largely transactional based, and therefore, the Company’s performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to clients’ accounts. 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 Company cardholder uses a non-Company ATM or a non-Company cardholder uses a Company 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. Loss (gain) on OREO Sales, net Loss (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, 2019 and 2018. For the three months ended March 31, 2019 2018 Non-interest income In-scope of Topic 606: Service Charges and other fees $ 4,843 $ 5,175 Bank card fees 3,428 3,362 Non-interest income (in-scope of Topic 606) 8,271 8,537 Non-interest income (out-of-scope of Topic 606) 8,780 9,298 Total non-interest income $ 17,051 $ 17,835 Non-interest expense In-scope of Topic 606: (Gain) loss on OREO sales, net (368) 78 Total revenue in-scope of Topic 606 $ 7,903 $ 8,615 Contract Balances A contract asset balance occurs when an entity performs a service for a client before the client pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity’s obligation to transfer a service to a client for which the entity has already received payment (or payment is due) from the client. The Company’s non-interest revenue streams are largely based on transactional activity, or standard month-end revenue accruals. Consideration is often received immediately or shortly after the Company satisfies its performance obligation and revenue is recognized. The Company does not typically enter into long-term revenue contracts with clients, and therefore, does not experience significant contract balances. As of March 31, 2019 and December 31, 2018, the Company did not have any contract balances. Contract Acquisition Costs In connection with the adoption of 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, 2019
Stock-based Compensation and Benefits
Stock-based Compensation and Benefits	Note 12 Stock-based Compensation and Benefits The Company provides stock-based compensation in accordance with shareholder-approved plans. During the second quarter of 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 vesting on each of the first, second and third anniversary of the date of grant or date of hire. The expense associated with the awarded stock options was measured at fair value using a Black-Scholes option-pricing model. The outstanding option awards vest or have vested on a graded basis over 1-3 years of continuous service and have a 10-year contractual term. The following table summarizes stock option activity for the three months ended March 31, 2019: Weighted average Weighted remaining average contractual Aggregate exercise term in intrinsic Options price years value Outstanding at December 31, 2018 1,264,876 $ 22.33 3.92 $ 11,387 Granted 3,749 35.75 Exercised (117,618) 20.37 Forfeited (40,023) 30.72 Outstanding at March 31, 2019 1,110,984 $ 22.28 3.68 $ 12,292 Options exercisable at March 31, 2019 892,922 20.14 2.53 11,731 Options vested and expected to vest 1,093,498 22.11 3.60 12,282 Stock option expense is a component of salaries and benefits in the consolidated statements of operations and totaled $47 thousand and $173 thousand for the three months ended March 31, 2019 and 2018, respectively. At March 31, 2019, there was $0.5 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 1.9 years. Restricted stock awards The Company issues primarily 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, 2019: Weighted Weighted Restricted average grant- Performance average grant- stock shares date fair value stock units date fair value Unvested at December 31, 2018 146,494 $ 28.19 192,049 $ 26.40 Granted 3,749 35.75 — — Net adjustment due to performance — — 22,246 17.36 Vested (26,594) 11.28 (95,308) 18.02 Forfeited (15,863) 31.57 (19,401) 31.54 Unvested at March 31, 2019 107,786 $ 32.13 99,586 $ 31.40 As of March 31, 2019, the total unrecognized compensation cost related to the non-vested restricted stock awards and performance stock units totaled $1.5 million and $1.8 million, respectively, and is expected to be recognized over a weighted average period of approximately 2.0 years and 1.7 years, respectively. Expense related to non-vested restricted stock awards totaled $0.2 million and $0.4 million during the three months ended March 31, 2019 and 2018, respectively. Expense related to non-vested performance stock units totaled $0.2 million and $0.2 million during the three months ended March 31, 2019 and 2018, 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 336,443 was available for issuance. Under the ESPP, employees purchased 6,201 shares and 5,960 shares during the three months ended March 31, 2019 and 2018, respectively.

Common Stock

Common Stock	3 Months Ended
	Mar. 31, 2019
Common Stock
Common Stock	Note 13 Common Stock The Company had 30,958,581 and 30,769,063 shares of Class A common stock outstanding at March 31, 2019 and December 31, 2018, respectively, exclusive of issued non-vested restricted shares. Additionally, the Company had 107,786 and 146,494 shares outstanding at March 31, 2019 and December 31, 2018, respectively, of restricted Class A common stock issued but not yet vested under the 2014 Omnibus Incentive 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 August 5, 2016, the Board of Directors authorized a new share repurchase program

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share
Earnings Per Share	Note 14 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 30,958,581 and 30,479,969 shares of Class A common stock outstanding as of March 31, 2019 and 2018, respectively, exclusive of issued non-vested restricted shares. Certain stock options and non-vested restricted shares are potentially dilutive securities, but are not included in the calculation of diluted earnings per share because to do so would have been anti-dilutive for the three months ended March 31, 2019 and 2018. The following table illustrates the computation of basic and diluted earnings per share for the three months ended March 31, 2019 and 2018: For the three months ended March 31, 2019 March 31, 2018 Net income $ 18,922 $ 8,464 Less: income allocated to participating securities (18) (13) Income allocated to common shareholders $ 18,904 $ 8,451 Weighted average shares outstanding for basic earnings per common share 30,961,187 30,493,689 Dilutive effect of equity awards 536,351 649,839 Weighted average shares outstanding for diluted earnings per common share 31,497,538 31,143,528 Basic earnings per share $ 0.61 $ 0.28 Diluted earnings per share $ 0.60 $ 0.27 The Company had 1,110,984 and 1,516,044 outstanding stock options to purchase common stock at weighted average exercise prices of $22.28 and $21.89 per share at March 31, 2019 and 2018, 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 207,372 and 418,638 unvested restricted shares and units issued as of March 31, 2019 and 2018, 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, 2019
Derivatives
Derivatives	Note 15 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, 2019 and December 31, 2018. Information about the valuation methods used to measure fair value is provided in note 17. Asset derivatives fair value Liability derivatives fair value Balance Sheet March 31, December 31, Balance Sheet March 31, December 31, location 2019 2018 Location 2019 2018 Derivatives designated as hedging instruments: Interest rate products Other assets $ 9,102 $ 17,436 Other liabilities $ 2,414 $ 228 Total derivatives designated as hedging instruments $ 9,102 $ 17,436 $ 2,414 $ 228 Derivatives not designated as hedging instruments: Interest rate products Other assets $ 4,933 $ 3,191 Other liabilities $ 5,358 $ 3,349 Interest rate lock commitments Other assets 1,539 871 Other liabilities 110 72 Forward contracts Other assets 13 — Other liabilities 472 Total derivatives not designated as hedging instruments $ 6,485 $ 4,062 $ 6,169 $ 3,893 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, 2019, the Company had interest rate swaps with a notional amount of $471.8 million, which were designated as fair value hedges of interest rate risk. As of December 31, 2018, the Company had interest rate swaps with a notional amount of $473.4 million that were designated as fair value hedges. These interest rate swaps were associated with $530.9 million and $522.7 million of the Company’s fixed-rate loans as of March 31, 2019 and December 31, 2018, respectively, before a $3.0 million and $13.2 million fair value loss hedge adjustment in the carrying amount, included in loans receivable on the statements of financial condition as of March 31, 2019 and December 31, 2018, 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, 2019, the Company had matched interest rate swap transactions with an aggregate notional amount of $486.4 million related to this program. As of December 31, 2018, the Company had matched interest rate swap transactions with an aggregate notional amount of $206.8 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 customers 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 asset, which is impacted by current interest rates, taking into consideration 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 recognized in current earnings during the period of change. The Company had interest rate lock commitments with a notional value of $96.9 million and forward contracts with a notional value of $118.6 million at March 31, 2019. At December 31, 2018, the Company had interest rate lock commitments with a notional value of $50.1 million and forward contracts with a notional value of $77.6 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, 2019 and 2018: Location of gain (loss) Amount of gain recognized in income on derivatives Derivatives in fair value recognized in income on For the three months ended March 31, hedging relationships derivatives 2019 2018 Interest rate products Interest and fees on loans $ 10,136 $ 12,052 Total $ 10,136 $ 12,052 Location of gain (loss) Amount of (loss) recognized in income on hedged items recognized in income on For the three months ended March 31, Hedged items hedged items 2019 2018 Interest rate products Interest and fees on loans $ (10,515) $ (11,917) Total $ (10,515) $ (11,917) 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 2019 2018 Interest rate products Other non-interest expense $ 273 $ 122 Interest rate lock commitments Mortgage banking income 1,152 375 Forward contracts Mortgage banking income (800) 1,108 Total $ 625 $ 1,605 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, 2019, the termination value of derivatives in a net liability position related to these agreements was $1.2 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, 2019 the Company had posted $2.1 million in eligible collateral. If the Company had breached any of these provisions at March 31, 2019, 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, 2019
Commitments and Contingencies
Commitments and Contingencies	Note 16 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. At March 31, 2019 and December 31, 2018, the Company had loan commitments totaling $738.4 million and $773.5 million, respectively, and standby letters of credit that totaled $11.2 million and $10.6 million, respectively. 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, 2019 and December 31, 2018 were as follows: March 31, 2019 December 31, 2018 Commitments to fund loans $ 204,282 $ 183,946 Unfunded commitments under lines of credit 534,112 589,573 Commercial and standby letters of credit 11,155 10,558 Total unfunded commitments $ 749,549 $ 784,077 Commitments to fund loans —Commitments to fund loans are legally binding agreements to lend to clients in accordance with predetermined contractual provisions providing there have been no violations of any conditions specified in the contract. These commitments are generally at variable interest rates and are for specific periods or contain termination clauses and may require the payment of a fee. The total amounts of unused commitments are not necessarily representative of future credit exposure or cash requirements, as commitments often expire without being drawn upon. Unfunded commitments under lines of credit —In the ordinary course of business, the Company extends revolving credit to its clients. These arrangements may require the payment of a fee. Commercial and standby letters of credit —As a provider of financial services, the Company routinely issues commercial and standby letters of credit, which may be financial standby letters of credit or performance standby letters of credit. These are various forms of “back-up” commitments to guarantee the performance of a client to a third party. While these arrangements represent a potential cash outlay for the Company, the majority of these letters of credit will expire without being drawn upon. Letters of credit are subject to the same underwriting and credit approval process as traditional loans, and as such, many of them have various forms of collateral securing the commitment, which may include real estate, personal property, receivables or marketable securities. 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 has 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 $3.4 million and $4.3 million at March 31, 2019 and 2018, 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, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 17 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. Although, in some instances, third party price indications may be available, limited trading activity can challenge the observability of these quotations. 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, 2019 and 2018, 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 —Investment securities available-for-sale are carried at fair value on a recurring basis. To the extent possible, observable quoted prices in an active market are used to determine fair value and, as such, these securities are classified as level 1. At March 31, 2019 and December 31, 2018, the Company did not hold any level 1 securities. When quoted market prices in active markets for identical assets or liabilities are not available, quoted prices of securities with similar characteristics, discounted cash flows or other pricing characteristics are used to estimate fair values and the securities are then classified as level 2. Loans held for sale —The Company has elected to record loans originated and intended for sale in the secondary market at estimated fair value. The portfolio consists primarily of fixed rate residential mortgage loans that are sold within 45 days. The Company estimates fair value based on quoted market prices for similar loans in the secondary market and is classified as Level 2. Interest rate swap derivatives —The Company's derivative instruments are limited to interest rate swaps that may be accounted for as fair value hedges or non-designated hedges. The fair values of the swaps incorporate credit valuation adjustments in order to appropriately reflect nonperformance risk in the fair value measurements. The credit valuation adjustment is the dollar amount of the fair value adjustment related to credit risk and utilizes a probability weighted calculation to quantify the potential loss over the life of the trade. The credit valuation adjustments are calculated by determining the total expected exposure of the derivatives (which incorporates both the current and potential future exposure) and then applying the respective counterparties’ credit spreads to the exposure offset by marketable collateral posted, if any. Certain derivative transactions are executed with counterparties who are large financial institutions ("dealers"). International Swaps and Derivative Association Master Agreements ("ISDA") and Credit Support Annexes ("CSA") are employed for all contracts with dealers. These contracts contain bilateral collateral arrangements. The fair value inputs of these financial instruments are determined using discounted cash flow analysis through the use of third-party models whose significant inputs are readily observable market parameters, primarily yield curves, with appropriate adjustments for liquidity and credit risk, and are classified as level 2. Mortgage banking derivatives —The Company relies on a third-party pricing service to value its mortgage banking derivative financial assets and liabilities, which the Company classifies as a level 3 valuation. The external valuation model to estimate the fair value of its interest rate lock commitments to originate residential mortgage loans held for sale includes grouping the interest rate lock commitments by interest rate and terms, applying an estimated pull-through rate based on historical experience, and then multiplying by quoted investor prices determined to be reasonably applicable to the loan commitment groups based on interest rate, terms, and rate lock expiration dates of the loan commitment groups. The Company also relies on an external 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, 2019 and December 31, 2018 on the consolidated statements of financial condition utilizing the hierarchy structure described above: March 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 $ — $ 134,488 $ — $ 134,488 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 613,970 — 613,970 Municipal securities — 441 — 441 Loans held for sale — 59,324 — 59,324 Interest rate swap derivatives — 14,035 — 14,035 Mortgage banking derivatives — — 1,552 1,552 Total assets at fair value $ — $ 822,258 $ 1,552 $ 823,810 Liabilities: Interest rate swap derivatives $ — $ 7,772 $ — $ 7,772 Mortgage banking derivatives — — 811 Total liabilities at fair value $ — $ 7,772 $ 811 $ 8,583 December 31, 2018 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 $ — $ 146,642 $ — $ 146,642 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 643,381 — 643,381 Municipal securities — 441 — 441 Loans held for sale — 48,120 — 48,120 Interest rate swap derivatives — 20,627 — 20,627 Mortgage banking derivatives — — 871 Total assets at fair value $ — $ 859,211 $ 871 $ Liabilities: Interest rate swap derivatives $ — $ 3,577 $ — $ 3,577 Mortgage banking derivatives — — 544 Total liabilities at fair value $ — $ 3,577 $ 544 $ 4,121 The table below details the changes in level 3 financial instruments during the three months ended March 31, 2019: Mortgage banking derivatives, net Balance at December 31, 2018 $ 327 Gain included in earnings, net 414 Balance at March 31, 2019 $ 741 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. Impaired loans —The Company records collateral dependent loans that are considered to be impaired at their estimated fair value. A loan is considered impaired when it is probable that the Company will be unable to collect all contractual amounts due in accordance with the terms of the loan agreement. Collateral dependent impaired loans are measured based on the fair value of the collateral. The Company relies on third-party appraisals and internal assessments, utilizing a discount rate in the range of 0% - 25%, in determining the estimated fair values of these loans. The inputs used to determine the fair values of loans are considered level 3 inputs in the fair value hierarchy. At March 31, 2019, the Company recorded a specific reserve of $1.5 million related to six originated and acquired loans with a carrying balance of $5.6 million. At March 31, 2018, the Company recorded a specific reserve of $1.2 million related to six loans with a carrying balance of $6.4 million. OREO —OREO is recorded at the fair value of the collateral less estimated selling costs. The estimated fair values of OREO are updated periodically and further write-downs may be taken to reflect a new basis. The Company recognized $596 thousand and $38 thousand of OREO impairments in its consolidated statements of operations during the three months ended March 31, 2019 and 2018, respectively. The fair values of OREO are derived from third party price opinions or appraisals that generally use an income approach or a market value approach. If reasonable comparable appraisals are not available, then the Company may use internally developed models to determine fair values. The inputs used to determine the fair value of OREO properties are considered level 3 inputs in the fair value hierarchy. Mortgage servicing rights — M ortgage servicing rights represent the value associated with servicing residential real estate loans that have been sold to outside investors with servicing retained. The fair value for servicing assets is determined through discounted cash flow analysis and utilizes discount rates ranging from 9.5% to 10.5% at March 31, 2019 and prepayment speed assumption ranges of 13.4% to 19.8% at March 31, 2019 as inputs. Mortgage servicing rights are subject to impairment testing. The carrying values of these rights are reviewed quarterly for impairment based upon the calculation of fair value. For purposes of measuring impairment, the rights are stratified into certain risk characteristics including note type and note term. If the valuation model reflects a value less than the carrying value, mortgage servicing rights are adjusted to fair value through a valuation allowance. There was a $0.1 million impairment of mortgage servicing rights recorded during the three months ended March 31, 2019, which is included in mortgage banking income on the consolidated statements of operations. No impairment of mortgage servicing rights was recorded for the three months ended March 31, 2018. The inputs used to determine the fair values of mortgage servicing rights are considered level 3 inputs in the fair value hierarchy. 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, 2019 and 2018: March 31, 2019 Total Losses from fair value changes Impaired loans $ 32,743 $ 245 Other real estate owned 9,394 596 Mortgage servicing rights 3,362 54 Total $ 45,499 $ 895 March 31, 2018 Total Losses from fair value changes Impaired loans $ 34,672 $ 715 Other real estate owned 11,875 38 Mortgage servicing rights 4,130 — Total $ 50,677 $ 753 The Company did not record any liabilities measured at fair value on a non-recurring basis during the three months ended March 31, 2019 and 2018.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 18 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, 2019 and December 31, 2018, including methods and assumptions utilized for determining fair value of financial instruments, are set forth below: Level in fair value March 31, 2019 December 31, 2018 measurement Carrying Estimated Carrying Estimated hierarchy amount fair value amount fair value ASSETS Cash and cash equivalents Level 1 $ 105,258 $ 105,258 $ 109,556 $ 109,556 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 134,488 134,488 146,642 146,642 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 613,970 613,970 643,381 643,381 Municipal securities Level 2 441 441 441 441 Municipal securities Level 3 169 169 169 169 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 2 147,221 146,316 157,115 154,412 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 74,506 73,291 78,283 76,514 Non-marketable securities Level 2 24,574 24,574 27,555 27,555 Loans receivable Level 3 4,246,941 4,279,916 4,092,308 4,082,146 Loans held for sale Level 2 59,324 59,324 48,120 48,120 Accrued interest receivable Level 2 22,362 22,362 17,852 17,852 Interest rate swap derivatives Level 2 14,035 14,035 20,627 20,627 Mortgage banking derivatives Level 3 1,552 1,552 871 871 LIABILITIES Deposit transaction accounts Level 2 3,633,356 3,633,356 3,445,092 3,445,092 Time deposits Level 2 1,081,092 1,072,986 1,080,529 1,068,233 Securities sold under agreements to repurchase Level 2 59,543 59,543 66,047 66,047 Federal Home Loan Bank advances Level 2 228,421 228,810 301,660 301,933 Accrued interest payable Level 2 8,731 8,731 6,889 6,889 Interest rate swap derivatives Level 2 7,772 7,772 3,577 3,577 Mortgage banking derivatives Level 3 544 544

Acquisition Activities

Acquisition Activities	3 Months Ended
	Mar. 31, 2019
Acquisition Activities
Acquisition Activities	Note 19 Acquisition Activities On January 1, 2018, the Company completed its acquisition of Peoples, Inc., the bank holding company of Colorado-based Peoples National Bank and Kansas-based Peoples Bank. Immediately following the completion of the acquisition, Peoples National Bank and Peoples Bank merged into NBH Bank. Pursuant to the merger agreement executed in June 2017, the Company paid $36.2 million of cash consideration and 3,398,477 shares of the Company’s Class A common stock in exchange for all of the outstanding common stock of Peoples. Included in the cash consideration is $10.0 million of restricted cash placed in escrow for certain potential liabilities the Company is indemnified for pursuant to the merger agreement. The restricted cash is included in other assets in the Company’s consolidated statements of financial condition at March 31, 2019. The transaction was valued at $146.4 million in the aggregate, based on the Company’s closing price of $32.43 on the acquisition date. Acquisition related costs of $7.6 million on a pre-tax basis were included in the Company’s consolidated statements of operations for the three months ended March 31, 2018. The results of Peoples are included in the results of the Company subsequent to the acquisition date. The Company determined that this acquisition constitutes a business combination as defined in ASC Topic 805, Business Combinations . Accordingly, as of the date of the acquisition, the Company recorded the assets acquired and liabilities assumed at fair value. The Company determined fair values in accordance with the guidance provided in ASC Topic 820, Fair Value Measurements and Disclosures . Fair value is established by discounting the expected future cash flows with a market discount rate for like maturities and risk instruments. The estimation of expected future cash flows, market conditions and other future events and actual results could differ materially. The determination of the fair values of fixed assets, loans, OREO, core deposit intangible, mortgage servicing rights and mortgage repurchase reserve involves a high degree of judgment and complexity. The table below summarizes the net assets acquired (at fair value) and consideration transferred in connection with the Peoples acquisition: Assets: Cash and due from banks $ 105,173 Investment securities available-for-sale 118,512 Non-marketable securities 4,796 Loans 542,707 Loans held for sale 54,260 Other real estate owned 1,253 Premises and equipment 18,584 Core deposit intangible asset 10,477 Mortgage servicing rights 4,301 Other assets 15,361 Total assets acquired $ 875,424 Liabilities: Total deposits 729,911 FHLB borrowings 33,825 Other liabilities 20,683 Total liabilities assumed $ 784,419 Identifiable net assets acquired $ 91,005 Consideration: NBHC common stock paid at January 1, 2018, closing price of $32.43 $ 110,213 Cash 36,189 Total $ 146,402 Goodwill $ 55,397 In connection with the Peoples acquisition, the Company recorded $55.4 million of goodwill, a $10.5 million core deposit intangible asset, a $4.3 million mortgage servicing rights intangible asset and a $4.0 million mortgage repurchase reserve, included in other liabilities. The core deposit intangible is being amortized straight-line over ten years and the mortgage servicing rights intangible is amortized in proportion to and over the period of the estimated net servicing income. The Federal Home Loan Bank (“FHLB”) borrowings of $33.8 million were paid off during the first quarter of 2018. The goodwill associated with this transaction is not tax deductible. At the date of acquisition, the gross contractual amounts receivable, inclusive of all principal and interest, was $713.6 million. The Company’s best estimate of the contractual principal cash flows for loans not expected to be collected was $2.1 million.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2019
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, 2019 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 $ 134,173 $ 1,269 $ (954) $ 134,488 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 625,776 1,675 (13,481) 613,970 Municipal securities 619 — (9) 610 Other securities 469 — — 469 Total investment securities available-for-sale $ 761,037 $ 2,944 $ (14,444) $ 749,537 December 31, 2018 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 $ 147,283 $ 1,232 $ (1,873) $ 146,642 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 661,354 1,056 (19,029) 643,381 Municipal securities 619 — (9) 610 Other securities 469 — — 469 Total investment securities available-for-sale $ 809,725 $ 2,288 $ (20,911) $ 791,102
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, 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 $ 235 $ — $ 86,197 $ (954) $ 86,432 $ (954) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 15,941 (9) 513,936 (13,472) 529,877 (13,481) Municipal securities — — 441 (9) 441 (9) Total $ 16,176 $ (9) $ 600,574 $ (14,435) $ 616,750 $ (14,444) December 31, 2018 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 $ 30,853 $ (392) $ 69,169 $ (1,481) $ 100,022 $ (1,873) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 127,767 (1,150) 454,662 (17,879) 582,429 (19,029) Municipal securities 441 (9) — — 441 (9) Total $ 159,061 $ (1,551) $ 523,831 $ (19,360) $ 682,892 $ (20,911)
Held-to-maturity Securities	Held-to-maturity investment securities are summarized as follows as of the dates indicated: March 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 $ 147,221 $ 33 $ (938) $ 146,316 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 74,506 76 (1,291) 73,291 Total investment securities held-to-maturity $ 221,727 $ 109 $ (2,229) $ 219,607 December 31, 2018 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 $ 157,115 $ 2 $ (2,705) $ 154,412 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 78,283 — (1,769) 76,514 Total investment securities held-to-maturity $ 235,398 $ 2 $ (4,474) $ 230,926
Summary of unrealized losses for held-to-maturity securities	The tables below summarize the held-to-maturity securities with unrealized losses as of the dates shown, along with the length of the impairment period: March 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 $ — $ — $ 141,907 $ (938) $ 141,907 $ (938) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — — 39,410 (1,291) 39,410 (1,291) Total $ — $ — $ 181,317 $ (2,229) $ 181,317 $ (2,229) December 31, 2018 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 $ 26,660 $ (381) $ 126,475 $ (2,324) $ 153,135 $ (2,705) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 35,235 (79) 41,279 (1,690) 76,514 (1,769) Total $ 61,895 $ (460) $ 167,754 $ (4,014) $ 229,649 $ (4,474)

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2019
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 carrying value of originated and acquired loans is net of discounts, fees, cost and fair value marks of $10.1 million and $10.2 million as of March 31, 2019 and December 31, 2018, respectively. March 31, 2019 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 2,737,005 $ 19,139 $ 2,756,144 Commercial real estate non-owner occupied 609,076 36,878 645,954 Residential real estate 815,144 7,508 822,652 Consumer 22,189 2 22,191 Total $ 4,183,414 $ 63,527 $ 4,246,941 December 31, 2018 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 2,624,173 $ 20,398 $ 2,644,571 Commercial real estate non-owner occupied 551,819 40,393 592,212 Residential real estate 820,820 9,995 830,815 Consumer 24,617 93 24,710 Total $ 4,021,429 $ 70,879 $ 4,092,308
Past Due Financing Receivables	Delinquency for originated and acquired loans is shown in the following tables at March 31, 2019 and December 31, 2018: March 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 Originated and acquired loans: Commercial: Commercial and industrial $ 3,388 $ 13 $ 6,136 $ 9,537 $ 2,010,349 $ 2,019,886 Owner occupied commercial real estate 124 530 6,710 7,364 421,359 428,723 Food and agriculture 288 — 759 1,047 231,981 233,028 Energy — — 804 804 54,564 55,368 Total commercial 3,800 543 14,409 18,752 2,718,253 2,737,005 Commercial real estate non-owner occupied: Construction 355 — 1,208 1,563 92,767 94,330 Acquisition/development 35 725 115 875 17,493 18,368 Multifamily — — — — 60,635 60,635 Non-owner occupied 199 — 897 1,096 434,647 435,743 Total commercial real estate 589 725 2,220 3,534 605,542 609,076 Residential real estate: Senior lien 1,398 91 8,768 10,257 707,162 717,419 Junior lien 416 — 832 1,248 96,477 97,725 Total residential real estate 1,814 91 9,600 11,505 803,639 815,144 Consumer 42 — 81 123 22,066 22,189 Total originated and acquired loans $ 6,245 $ 1,359 $ 26,310 $ 33,914 $ 4,149,500 $ 4,183,414 December 31, 2018 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 Originated and acquired loans: Commercial: Commercial and industrial $ 495 $ 74 $ 5,510 $ 6,079 $ 1,925,068 $ 1,931,147 Owner occupied commercial real estate 893 — 6,931 7,824 413,842 421,666 Food and agriculture 141 125 768 1,034 221,122 222,156 Energy — — 742 742 48,462 49,204 Total commercial 1,529 199 13,951 15,679 2,608,494 2,624,173 Commercial real estate non-owner occupied: Construction — — 1,208 1,208 93,646 94,854 Acquisition/development — — 121 121 19,529 19,650 Multifamily — — — — 56,685 56,685 Non-owner occupied 328 132 572 1,032 379,598 380,630 Total commercial real estate 328 132 1,901 2,361 549,458 551,819 Residential real estate: Senior lien 2,106 548 7,790 10,444 712,592 723,036 Junior lien 556 — 772 1,328 96,456 97,784 Total residential real estate 2,662 548 8,562 11,772 809,048 820,820 Consumer 91 16 42 149 24,468 24,617 Total originated and acquired loans $ 4,610 $ 895 $ 24,456 $ 29,961 $ 3,991,468 $ 4,021,429
Credit Exposure for Loans as Determined by Company's Internal Risk Rating System	Credit exposure for all loans as determined by the Company’s internal risk rating system was as follows at March 31, 2019 and December 31, 2018, respectively: March 31, 2019 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,980,564 $ 19,051 $ 18,934 $ 1,337 $ 2,019,886 Owner occupied commercial real estate 397,240 19,941 11,457 85 428,723 Food and agriculture 230,558 1,220 1,218 32 233,028 Energy 54,564 — 804 — 55,368 Total commercial 2,662,926 40,212 32,413 1,454 2,737,005 Commercial real estate non-owner occupied: Construction 92,690 432 1,208 — 94,330 Acquisition/development 17,486 767 115 — 18,368 Multifamily 60,119 516 — — 60,635 Non-owner occupied 419,021 15,122 1,563 37 435,743 Total commercial real estate 589,316 16,837 2,886 37 609,076 Residential real estate: Senior lien 704,303 3,455 9,661 — 717,419 Junior lien 96,343 417 965 — 97,725 Total residential real estate 800,646 3,872 10,626 — 815,144 Consumer 22,108 — 81 — 22,189 Total originated and acquired loans $ 4,074,996 $ 60,921 $ 46,006 $ 1,491 $ 4,183,414 Loans accounted for under ASC 310-30: Commercial $ 16,452 $ 518 $ 2,169 $ — $ 19,139 Commercial real estate non-owner occupied 35,839 242 797 — 36,878 Residential real estate 5,243 849 1,416 — 7,508 Consumer 2 — — — 2 Total loans accounted for under ASC 310-30 $ 57,536 $ 1,609 $ 4,382 $ — $ 63,527 Total loans $ 4,132,532 $ 62,530 $ 50,388 $ 1,491 $ 4,246,941 December 31, 2018 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,890,710 $ 16,531 $ 22,919 $ 987 $ 1,931,147 Owner occupied commercial real estate 393,404 16,349 11,828 85 421,666 Food and agriculture 220,004 1,260 847 45 222,156 Energy 48,462 — 742 — 49,204 Total commercial 2,552,580 34,140 36,336 1,117 2,624,173 Commercial real estate non-owner occupied: Construction 92,731 915 1,208 — 94,854 Acquisition/development 19,529 — 121 — 19,650 Multifamily 56,685 — — — 56,685 Non-owner occupied 355,776 23,243 1,611 — 380,630 Total commercial real estate 524,721 24,158 2,940 — 551,819 Residential real estate: Senior lien 710,972 3,571 8,493 — 723,036 Junior lien 96,456 415 913 — 97,784 Total residential real estate 807,428 3,986 9,406 — 820,820 Consumer 24,575 — 42 — 24,617 Total originated and acquired loans $ 3,909,304 $ 62,284 $ 48,724 $ 1,117 $ 4,021,429 Loans accounted for under ASC 310-30: Commercial $ 17,579 $ 537 $ 2,282 $ — $ 20,398 Commercial real estate non-owner occupied 39,322 246 825 — 40,393 Residential real estate 7,484 908 1,598 — 9,990 Consumer — — 98 — 98 Total loans accounted for under ASC 310-30 $ 64,385 $ 1,691 $ 4,803 $ — $ 70,879 Total loans $ 3,973,689 $ 63,975 $ 53,527 $ 1,117 $ 4,092,308
Schedule Of Impaired Financing Receivable With And Without Related Allowance	Additional information regarding impaired loans at March 31, 2019 and December 31, 2018 is set forth in the table below: March 31, 2019 December 31, 2018 Allowance Allowance Unpaid for loan Unpaid for loan principal Recorded losses principal Recorded losses balance investment allocated balance investment allocated With no related allowance recorded: Commercial: Commercial and industrial $ 4,558 $ 3,173 $ — $ 4,374 $ 3,029 $ — Owner occupied commercial real estate 6,975 6,405 — 7,130 6,609 — Food and agriculture 1,468 1,220 — 1,468 1,260 — Energy 5,429 804 — 5,366 742 — Total commercial 18,430 11,602 — 18,338 11,640 — Commercial real estate non-owner occupied: Construction 1,435 1,208 — 1,435 1,208 — Acquisition/development 377 115 — 378 121 — Multifamily — — — — — — Non-owner occupied 642 546 — 641 547 — Total commercial real estate 2,454 1,869 — 2,454 1,876 — Residential real estate: Senior lien 4,667 4,310 — 4,229 3,814 — Junior lien 430 358 — 409 341 — Total residential real estate 5,097 4,668 — 4,638 4,155 — Consumer 86 81 — 46 42 — Total impaired loans with no related allowance recorded $ 26,067 $ 18,220 $ — $ 25,476 $ 17,713 $ — With a related allowance recorded: Commercial: Commercial and industrial $ 7,736 $ 5,109 $ 1,348 $ 7,252 $ 4,627 $ 996 Owner occupied commercial real estate 1,317 1,115 90 1,362 1,169 90 Food and agriculture 997 960 33 883 845 46 Energy — — — — — — Total commercial 10,050 7,184 1,471 9,497 6,641 1,132 Commercial real estate non-owner occupied: Construction — — — — — — Acquisition/development — — — — — — Multifamily — — — — — — Non-owner occupied 620 561 39 313 254 2 Total commercial real estate 620 561 39 313 254 2 Residential real estate: Senior lien 6,492 5,582 28 6,032 5,178 27 Junior lien 1,320 1,196 8 1,408 1,293 8 Total residential real estate 7,812 6,778 36 7,440 6,471 35 Consumer — — — — — — Total impaired loans with a related allowance recorded $ 18,482 $ 14,523 $ 1,546 $ 17,250 $ 13,366 $ 1,169 Total impaired loans $ 44,549 $ 32,743 $ 1,546 $ 42,726 $ 31,079 $ 1,169
Schedule of Impaired Financing Receivable, Average Recorded Investment and Interest Income Recognized	The table below shows additional information regarding the average recorded investment and interest income recognized on impaired loans for the periods presented: For the three months ended March 31, 2019 March 31, 2018 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 3,189 $ 12 $ 5,534 $ 83 Owner occupied commercial real estate 6,425 3 7,487 18 Food and agriculture 1,220 1 1,259 6 Energy 777 — 2,353 20 Total commercial 11,611 16 16,633 127 Commercial real estate non-owner occupied: Construction 1,208 — — — Acquisition/development 117 — 886 — Multifamily — — — — Non-owner occupied 546 — 876 4 Total commercial real estate 1,871 — 1,762 4 Residential real estate: Senior lien 4,325 2 1,612 — Junior lien 363 — 305 — Total residential real estate 4,688 2 1,917 — Consumer 11 — 14 — Total impaired loans with no related allowance recorded $ 18,181 $ 18 $ 20,326 $ 131 With a related allowance recorded: Commercial: Commercial and industrial $ 5,113 $ — $ 4,339 $ — Owner occupied commercial real estate 1,125 4 1,265 5 Food and agriculture 961 — 2,126 1 Energy — — — — Total commercial 7,199 4 7,730 6 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily — — 29 — Non-owner occupied 566 9 196 2 Total commercial real estate 566 9 225 2 Residential real estate: Senior lien 5,629 25 5,601 13 Junior lien 1,205 40 1,151 9 Total residential real estate 6,834 65 6,752 22 Consumer 72 — 24 — Total impaired loans with a related allowance recorded $ 14,671 $ 78 $ 14,731 $ 30 Total impaired loans $ 32,852 $ 96 $ 35,057 $ 161
Additional Information Related to Accruing TDR's	The tables below provide additional information related to accruing TDRs at March 31, 2019 and December 31, 2018: March 31, 2019 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 941 $ 943 $ 1,061 $ 150 Commercial real estate non-owner occupied 195 198 240 — Residential real estate 1,071 1,079 1,078 12 Consumer — — — — Total $ 2,207 $ 2,220 $ 2,379 $ 162 December 31, 2018 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 2,730 $ 2,827 $ 3,155 $ — Commercial real estate non-owner occupied 229 260 280 — Residential real estate 1,114 1,163 1,121 12 Consumer — — — — Total $ 4,073 $ 4,250 $ 4,556 $ 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, 2019 and December 31, 2018: March 31, 2019 December 31, 2018 Commercial $ 1,667 $ 1,854 Commercial real estate non-owner occupied — — Residential real estate 1,828 1,584 Consumer — — Total non-accruing TDRs $ 3,495 $ 3,438
Re-Measurement of Loans Accounted for Under ASC Topic 310-30 Resulting in Changes in Carrying Amount of Accretable Yield	The remeasurement of loans accounted for under ASC 310-30 resulted in the following changes in the carrying amount of accretable yield during the three months ended March 31, 2019 and 2018: March 31, 2019 March 31, 2018 Accretable yield beginning balance $ 35,901 $ 46,568 Reclassification from non-accretable difference 1,524 5,409 Reclassification to non-accretable difference (421) (1,390) Accretion (3,687) (5,394) Accretable yield ending balance $ 33,317 $ 45,193
Composition of Net Book Value for Loans Accounted for under ASC Topic 310-30	Below is the composition of the net book value for loans accounted for under ASC 310-30 at March 31, 2019 and December 31, 2018: March 31, 2019 December 31, 2018 Contractual cash flows $ 409,942 $ 420,994 Non-accretable difference (313,098) (314,214) Accretable yield (33,317) (35,901) Loans accounted for under ASC 310-30 $ 63,527 $ 70,879

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Summary of Company's Allowance for Loan Losses ("ALL") and Recorded Investment in Loans	The tables below detail the Company’s allowance for loan losses and recorded investment in loans as of and for the three months ended March 31, 2019 and 2018: 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 Originated and acquired beginning balance 26,946 4,406 3,760 349 35,461 Charge-offs (12) — (23) (233) (268) Recoveries 27 11 13 46 97 Provision 933 497 (66) 186 1,550 Originated and acquired ending balance 27,894 4,914 3,684 348 36,840 ASC 310-30 beginning balance 191 — 40 — 231 Charge-offs — — — — — Recoveries — — — — — Recoupment (10) — (6) — (16) ASC 310-30 ending balance 181 — 34 — 215 Ending balance $ 28,075 $ 4,914 $ 3,718 $ 348 $ 37,055 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 1,471 $ 39 $ 36 $ — $ 1,546 Originated and acquired loans collectively evaluated for impairment 26,423 4,875 3,648 348 35,294 ASC 310-30 loans 181 — 34 — 215 Total ending allowance balance $ 28,075 $ 4,914 $ 3,718 $ 348 $ 37,055 Loans: Originated and acquired loans individually evaluated for impairment $ 18,786 $ 2,430 $ 4,583 $ 6,944 $ 32,743 Originated and acquired loans collectively evaluated for impairment 2,718,219 606,646 810,561 15,245 4,150,671 ASC 310-30 loans 19,139 36,878 7,508 2 63,527 Total loans $ 2,756,144 $ 645,954 $ 822,652 $ 22,191 $ 4,246,941 Three months ended March 31, 2018 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 21,385 $ 5,609 $ 3,965 $ 305 $ 31,264 Originated and acquired beginning balance 21,340 5,583 3,965 305 31,193 Charge-offs (437) — — (279) (716) Recoveries 42 — 2 53 97 Provision 540 (712) (39) 211 — Originated and acquired ending balance 21,485 4,871 3,928 290 30,574 ASC 310-30 beginning balance 45 26 — — 71 Charge-offs — — — — — Recoveries — — — — — Provision (recoupment) 48 (7) — — 41 ASC 310-30 ending balance 93 19 — — 112 Ending balance $ 21,578 $ 4,890 $ 3,928 $ 290 $ 30,686 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 1,185 $ 2 $ 31 $ — $ 1,218 Originated and acquired loans collectively evaluated for impairment 20,300 4,868 3,897 290 29,355 ASC 310-30 loans 93 20 — — 113 Total ending allowance balance $ 21,578 $ 4,890 $ 3,928 $ 290 $ 30,686 Loans: Originated and acquired loans individually evaluated for impairment $ 24,175 $ 1,901 $ 8,558 $ 38 $ 34,672 Originated and acquired loans collectively evaluated for impairment 2,057,022 633,537 838,597 26,197 3,555,353 ASC 310-30 loans 24,702 75,277 12,000 330 112,309 Total loans $ 2,105,899 $ 710,715 $ 859,155 $ 26,565 $ 3,702,334

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases
Summary of future minimum lease payments	Amount For the nine months ending December 31, 2019 $ 4,295 For the year ending December 31, 2020 5,172 For the year ending December 31, 2021 4,843 For the year ending December 31, 2022 4,324 For the year ending December 31, 2023 3,921 Thereafter 16,570 Total lease payments 39,125 Less: Imputed interest 9,719 Present value of operating lease liabilities $ 29,406
Summary of Future Minimum Lease Payments	Years ending December 31, Amount 2019 $ 3,092 2020 2,981 2021 3,091 2022 3,052 2023 2,047 Thereafter 10,163 Total $ 24,426

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2019
FDIC Loss-Sharing Related
Summary of Activity in OREO Balances	A summary of the activity in the OREO balances during the three months ended March 31, 2019 and 2018 is as follows: For the three months ended March 31, 2019 2018 Beginning balance $ 10,596 $ 10,491 Acquired through acquisition — 1,409 Transfers from loan portfolio, at fair value 288 127 Impairments (596) (38) Sales (894) (114) Ending balance $ 9,394 $ 11,875

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
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, 2019 and December 31, 2018, are presented as follows: March 31, 2019 December 31, 2018 Gross Net Gross Net carrying Accumulated carrying carrying Accumulated carrying amount amortization amount amount amortization amount Core deposit intangible $ 48,834 $ 39,215 $ 9,619 $ 48,834 $ 38,920 $ 9,914
Summary of changes in the mortgage servicing rights	Below are the changes in the mortgage servicing rights for the periods presented: For the three months ended March 31, 2019 2018 Beginning balance $ 3,556 $ — Acquired through acquisition — 4,301 Originations 13 — Impairment (54) — Amortization (153) (171) Ending balance $ 3,362 $ 4,130 Fair value of mortgage servicing rights 3,564 4,712
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, 2019: Years ending December 31, Amount For the nine months ending December 31, 2019 $ 887 For the year ending December 31, 2020 1,183 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
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 mortgage servicing rights as of March 31, 2019: Years ending December 31, Amount For the nine months ending December 31, 2019 $ 449 For the year ending December 31, 2020 519 For the year ending December 31, 2021 427 For the year ending December 31, 2022 351 For the year ending December 31, 2023 288

Regulatory Capital (Tables)

Regulatory Capital (Tables)	3 Months Ended
	Mar. 31, 2019
Regulatory Capital
Capital Ratio Requirements under Prompt Corrective Action or Other Regulatory Requirements	March 31, 2019 Required to be Required to be well capitalized under considered prompt corrective adequately Actual action provisions capitalized Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: Consolidated $ 595,782 N/A N/A $ 224,123 NBH Bank 499,314 $ 279,602 223,682 Common equity tier 1 risk-based capital: Consolidated $ 595,782 N/A N/A $ 392,215 NBH Bank 499,314 $ 363,483 391,443 Tier 1 risk-based capital ratio: Consolidated $ 595,782 N/A N/A $ 394,452 NBH Bank 499,314 $ 370,298 393,441 Total risk-based capital ratio: Consolidated $ 636,902 N/A N/A $ 487,264 NBH Bank 540,434 $ 462,872 486,016 December 31, 2018 Required to be Required to be well capitalized under considered prompt corrective adequately Actual action provisions capitalized Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: Consolidated $ 580,504 N/A N/A $ 220,988 NBH Bank 498,283 $ 275,703 220,563 Common equity tier 1 risk-based capital: Consolidated $ 580,504 N/A N/A $ 386,728 NBH Bank 498,283 $ 358,414 385,984 Tier 1 risk-based capital ratio: Consolidated $ 580,504 N/A N/A $ 382,306 NBH Bank 498,283 $ 358,938 381,372 Total risk-based capital ratio: Consolidated $ 620,275 N/A N/A $ 472,261 NBH Bank 538,054 $ 448,672 471,106 (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, 2019
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, 2019 and 2018. For the three months ended March 31, 2019 2018 Non-interest income In-scope of Topic 606: Service Charges and other fees $ 4,843 $ 5,175 Bank card fees 3,428 3,362 Non-interest income (in-scope of Topic 606) 8,271 8,537 Non-interest income (out-of-scope of Topic 606) 8,780 9,298 Total non-interest income $ 17,051 $ 17,835 Non-interest expense In-scope of Topic 606: (Gain) loss on OREO sales, net (368) 78 Total revenue in-scope of Topic 606 $ 7,903 $ 8,615

Stock-based Compensation and _2

Stock-based Compensation and Benefits (Tables)	3 Months Ended
	Mar. 31, 2019
Stock-based Compensation and Benefits
Summary of Option Activity	Weighted average Weighted remaining average contractual Aggregate exercise term in intrinsic Options price years value Outstanding at December 31, 2018 1,264,876 $ 22.33 3.92 $ 11,387 Granted 3,749 35.75 Exercised (117,618) 20.37 Forfeited (40,023) 30.72 Outstanding at March 31, 2019 1,110,984 $ 22.28 3.68 $ 12,292 Options exercisable at March 31, 2019 892,922 20.14 2.53 11,731 Options vested and expected to vest 1,093,498 22.11 3.60 12,282
Summary of Restricted Stock Activity	Weighted Weighted Restricted average grant- Performance average grant- stock shares date fair value stock units date fair value Unvested at December 31, 2018 146,494 $ 28.19 192,049 $ 26.40 Granted 3,749 35.75 — — Net adjustment due to performance — — 22,246 17.36 Vested (26,594) 11.28 (95,308) 18.02 Forfeited (15,863) 31.57 (19,401) 31.54 Unvested at March 31, 2019 107,786 $ 32.13 99,586 $ 31.40

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share
Schedule of Computation of Basic and Diluted Income (Loss) Per Share	For the three months ended March 31, 2019 March 31, 2018 Net income $ 18,922 $ 8,464 Less: income allocated to participating securities (18) (13) Income allocated to common shareholders $ 18,904 $ 8,451 Weighted average shares outstanding for basic earnings per common share 30,961,187 30,493,689 Dilutive effect of equity awards 536,351 649,839 Weighted average shares outstanding for diluted earnings per common share 31,497,538 31,143,528 Basic earnings per share $ 0.61 $ 0.28 Diluted earnings per share $ 0.60 $ 0.27

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2019
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 2019 2018 Location 2019 2018 Derivatives designated as hedging instruments: Interest rate products Other assets $ 9,102 $ 17,436 Other liabilities $ 2,414 $ 228 Total derivatives designated as hedging instruments $ 9,102 $ 17,436 $ 2,414 $ 228 Derivatives not designated as hedging instruments: Interest rate products Other assets $ 4,933 $ 3,191 Other liabilities $ 5,358 $ 3,349 Interest rate lock commitments Other assets 1,539 871 Other liabilities 110 72 Forward contracts Other assets 13 — Other liabilities 472 Total derivatives not designated as hedging instruments $ 6,485 $ 4,062 $ 6,169 $ 3,893
Derivative Instruments, Gain (Loss)	Location of gain (loss) Amount of gain recognized in income on derivatives Derivatives in fair value recognized in income on For the three months ended March 31, hedging relationships derivatives 2019 2018 Interest rate products Interest and fees on loans $ 10,136 $ 12,052 Total $ 10,136 $ 12,052 Location of gain (loss) Amount of (loss) recognized in income on hedged items recognized in income on For the three months ended March 31, Hedged items hedged items 2019 2018 Interest rate products Interest and fees on loans $ (10,515) $ (11,917) Total $ (10,515) $ (11,917) 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 2019 2018 Interest rate products Other non-interest expense $ 273 $ 122 Interest rate lock commitments Mortgage banking income 1,152 375 Forward contracts Mortgage banking income (800) 1,108 Total $ 625 $ 1,605

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies
Schedule of Total Unfunded Commitments	March 31, 2019 December 31, 2018 Commitments to fund loans $ 204,282 $ 183,946 Unfunded commitments under lines of credit 534,112 589,573 Commercial and standby letters of credit 11,155 10,558 Total unfunded commitments $ 749,549 $ 784,077

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Tables of Financial Instruments Measured At Fair Value on Recurring Basis	March 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 $ — $ 134,488 $ — $ 134,488 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 613,970 — 613,970 Municipal securities — 441 — 441 Loans held for sale — 59,324 — 59,324 Interest rate swap derivatives — 14,035 — 14,035 Mortgage banking derivatives — — 1,552 1,552 Total assets at fair value $ — $ 822,258 $ 1,552 $ 823,810 Liabilities: Interest rate swap derivatives $ — $ 7,772 $ — $ 7,772 Mortgage banking derivatives — — 811 Total liabilities at fair value $ — $ 7,772 $ 811 $ 8,583 December 31, 2018 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 $ — $ 146,642 $ — $ 146,642 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 643,381 — 643,381 Municipal securities — 441 — 441 Loans held for sale — 48,120 — 48,120 Interest rate swap derivatives — 20,627 — 20,627 Mortgage banking derivatives — — 871 Total assets at fair value $ — $ 859,211 $ 871 $ Liabilities: Interest rate swap derivatives $ — $ 3,577 $ — $ 3,577 Mortgage banking derivatives — — 544 Total liabilities at fair value $ — $ 3,577 $ 544 $ 4,121
Table of Changes in Level 3 Financial Instruments	Mortgage banking derivatives, net Balance at December 31, 2018 $ 327 Gain included in earnings, net 414 Balance at March 31, 2019 $ 741
Table of assets recorded at fair value on a non-recurring basis	March 31, 2019 Total Losses from fair value changes Impaired loans $ 32,743 $ 245 Other real estate owned 9,394 596 Mortgage servicing rights 3,362 54 Total $ 45,499 $ 895 March 31, 2018 Total Losses from fair value changes Impaired loans $ 34,672 $ 715 Other real estate owned 11,875 38 Mortgage servicing rights 4,130 — Total $ 50,677 $ 753

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Level in fair value March 31, 2019 December 31, 2018 measurement Carrying Estimated Carrying Estimated hierarchy amount fair value amount fair value ASSETS Cash and cash equivalents Level 1 $ 105,258 $ 105,258 $ 109,556 $ 109,556 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 134,488 134,488 146,642 146,642 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 613,970 613,970 643,381 643,381 Municipal securities Level 2 441 441 441 441 Municipal securities Level 3 169 169 169 169 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 2 147,221 146,316 157,115 154,412 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 74,506 73,291 78,283 76,514 Non-marketable securities Level 2 24,574 24,574 27,555 27,555 Loans receivable Level 3 4,246,941 4,279,916 4,092,308 4,082,146 Loans held for sale Level 2 59,324 59,324 48,120 48,120 Accrued interest receivable Level 2 22,362 22,362 17,852 17,852 Interest rate swap derivatives Level 2 14,035 14,035 20,627 20,627 Mortgage banking derivatives Level 3 1,552 1,552 871 871 LIABILITIES Deposit transaction accounts Level 2 3,633,356 3,633,356 3,445,092 3,445,092 Time deposits Level 2 1,081,092 1,072,986 1,080,529 1,068,233 Securities sold under agreements to repurchase Level 2 59,543 59,543 66,047 66,047 Federal Home Loan Bank advances Level 2 228,421 228,810 301,660 301,933 Accrued interest payable Level 2 8,731 8,731 6,889 6,889 Interest rate swap derivatives Level 2 7,772 7,772 3,577 3,577 Mortgage banking derivatives Level 3 544 544

Acquisition Activities (Tables)

Acquisition Activities (Tables)	3 Months Ended
	Mar. 31, 2019
Acquisition Activities
Net Assets acquired (at fair value) and consideration transferred	Assets: Cash and due from banks $ 105,173 Investment securities available-for-sale 118,512 Non-marketable securities 4,796 Loans 542,707 Loans held for sale 54,260 Other real estate owned 1,253 Premises and equipment 18,584 Core deposit intangible asset 10,477 Mortgage servicing rights 4,301 Other assets 15,361 Total assets acquired $ 875,424 Liabilities: Total deposits 729,911 FHLB borrowings 33,825 Other liabilities 20,683 Total liabilities assumed $ 784,419 Identifiable net assets acquired $ 91,005 Consideration: NBHC common stock paid at January 1, 2018, closing price of $32.43 $ 110,213 Cash 36,189 Total $ 146,402 Goodwill $ 55,397

Basis of Presentation (Details)

Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2019item
Basis of Presentation
Number of full service banking offices	104

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands		Jan. 01, 2019	Mar. 31, 2019	[1]	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment			$ 256		$ 26	[2]
ASU 2016-02 and ASU 2018-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease right-of-use assets		$ 30,500
Lease liabilities		30,500
Cumulative effect adjustment		$ 300
Retained earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects from accumulated other comprehensive income	[3]				1,479
Cumulative effect adjustment			$ 256		$ 26	[2]
[1]	Related to the adoption of Accounting Standards Update No. 2016-02, Leases. Refer to note 2 - Recent Accounting Pronouncements of our consolidated financial statements for further details.
[2]	Related to the adoption of Accounting Standards Update No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.
[3]	Related to the adoption of Accounting Standards Update No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.

Investment Securities - Narrati

Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019USD ($)security	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)security
Investment securities total	$ 1,000,000		$ 1,000,000
Amortized cost	761,037		809,725
Available-for-sale securities	749,537		791,102
Held-to-maturity securities	$ 221,727		$ 235,398
Number of securities | security	183		211
Fair value of available-for-sale securities in an unrealized loss position	$ 616,750		$ 682,892
OTTI charges recorded	$ 0	$ 0
Residential mortgage loans held for sale period	45 days
Fair value of available-for-sale investment securities pledged as collateral	$ 336,200		$ 318,100
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	43		49
Fair value of held-to-maturity securities in an unrealized loss position	$ 181,317		$ 229,649
Held-to-maturity investment securities pledged as collateral	$ 128,900		$ 133,100
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 8 months 12 days		2 years 9 months 18 days
Life of the held-to-maturity investment portfolio	2 years 6 months		2 years 6 months
Municipal securities maturing within one to five years [Member]
Amortized cost	$ 200
Available-for-sale securities	200
Municipal securities due within five to ten years [Member]
Amortized cost	400
Available-for-sale securities	400
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, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 761,037	$ 809,725
Gross unrealized gains	2,944	2,288
Gross unrealized losses	(14,444)	(20,911)
Investment securities available-for-sale (at fair value)	749,537	791,102
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	134,173	147,283
Gross unrealized gains	1,269	1,232
Gross unrealized losses	(954)	(1,873)
Investment securities available-for-sale (at fair value)	134,488	146,642
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	625,776	661,354
Gross unrealized gains	1,675	1,056
Gross unrealized losses	(13,481)	(19,029)
Investment securities available-for-sale (at fair value)	613,970	643,381
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	619	619
Gross unrealized losses	(9)	(9)
Investment securities available-for-sale (at fair value)	610	610
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, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	$ 16,176	$ 159,061
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(9)	(1,551)
12 months or more, Fair Value	600,574	523,831
NBHC_AvailableForSaleSecuritiesDebtMaturitiesTwelveMonthsOrGreaterFairValue	600,574	523,831
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(14,435)	(19,360)
Total, Fair Value	616,750	682,892
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(14,444)	(20,911)
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]
Less than 12 months Fair Value	235	30,853
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(392)
12 months or more, Fair Value	86,197	69,169
NBHC_AvailableForSaleSecuritiesDebtMaturitiesTwelveMonthsOrGreaterFairValue	86,197	69,169
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(954)	(1,481)
Total, Fair Value	86,432	100,022
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(954)	(1,873)
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	15,941	127,767
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(9)	(1,150)
12 months or more, Fair Value	513,936	454,662
NBHC_AvailableForSaleSecuritiesDebtMaturitiesTwelveMonthsOrGreaterFairValue	513,936	454,662
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(13,472)	(17,879)
Total, Fair Value	529,877	582,429
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(13,481)	(19,029)
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value		441
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(9)
12 months or more, Fair Value	441
NBHC_AvailableForSaleSecuritiesDebtMaturitiesTwelveMonthsOrGreaterFairValue	441
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(9)
Total, Fair Value	441	441
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (9)	$ (9)

Investment Securities - Summa_3

Investment Securities - Summary of Held-to-maturity Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	$ 221,727	$ 235,398
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	109	2
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(2,229)	(4,474)
Fair value	219,607	230,926
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	147,221	157,115
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	33	2
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(938)	(2,705)
Fair value	146,316	154,412
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	74,506	78,283
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	76
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(1,291)	(1,769)
Fair value	$ 73,291	$ 76,514

Investment Securities - Summa_4

Investment Securities - Summary of Held-to-Maturity Securities, Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Fair Value, Less than 12 months		$ 61,895
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(460)
Fair Value, 12 months or more	$ 181,317	167,754
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2,229)	(4,014)
Total Fair Value	181,317	229,649
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(2,229)	(4,474)
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		26,660
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(381)
Fair Value, 12 months or more	141,907	126,475
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(938)	(2,324)
Total Fair Value	141,907	153,135
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(938)	(2,705)
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		35,235
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(79)
Fair Value, 12 months or more	39,410	41,279
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,291)	(1,690)
Total Fair Value	39,410	76,514
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (1,291)	$ (1,769)

Loans - Narrative Section (Deta

Loans - Narrative Section (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Debt Instrument [Line Items]
Carrying amount of loan investments	$ 4,246,941	$ 4,092,308	$ 3,702,334
Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,756,144	2,644,571
Non Accrual [Member]
Debt Instrument [Line Items]
Recorded investment, non-accrual status	26,300
Increase (decrease) in non-accrual loans	$ 1,900
Percentage increase (decrease) in past due loans	7.60%
Originated and acquired loans [Member]
Debt Instrument [Line Items]
Fees and cost related to loans	$ 10,100	10,200
Carrying amount of loan investments	4,183,414	4,021,429
Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,737,005	2,624,173
ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	63,527	70,879	$ 112,309
ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	19,139	20,398
Total Loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	4,246,941	4,092,308
Total Loans [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	4,183,414	4,021,429
Recorded investment, non-accrual status	26,310	24,456
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,019,886	1,931,147
Recorded investment, non-accrual status	6,136	5,510
Total Loans [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	55,368	49,204
Recorded investment, non-accrual status	804	742
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,737,005	2,624,173
Recorded investment, non-accrual status	14,409	13,951
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	428,723	421,666
Recorded investment, non-accrual status	6,710	6,931
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	435,743	380,630
Recorded investment, non-accrual status	897	572
Total Loans [Member] | ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	63,527	70,879
Total Loans [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	19,139	20,398
Total Loans [Member] | Substandard [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	50,388	53,527
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	46,006	48,724
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	18,934	22,919
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	804	742
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	32,413	36,336
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	11,457	11,828
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,563	1,611
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	4,382	4,803
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,169	2,282
Total Loans [Member] | Special Mention [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	62,530	63,975
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	60,921	62,284
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	19,051	16,531
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	40,212	34,140
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	19,941	16,349
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	15,122	23,243
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,609	1,691
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	518	537
Total Loans [Member] | Doubtful [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,491	1,117
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,491	1,117
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,337	987
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,454	1,117
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	85	$ 85
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	$ 37

Loans - Impaired Loans Narrativ

Loans - Impaired Loans Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Debt Instrument [Line Items]
Carrying amount of loan investments	$ 4,246,941	$ 4,092,308	$ 3,702,334
Recorded investment of impaired loans	32,743	31,079
Recorded investment of accruing TDRs	2,200	4,100
Collective related allowance for loan losses for impaired loans	$ 1,546	$ 1,169

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, 2019	Dec. 31, 2018	Mar. 31, 2018
Loans [Line Items]
Total Loans	$ 4,246,941	$ 4,092,308	$ 3,702,334
% of Total	100.00%	100.00%
Commercial Loan [Member]
Loans [Line Items]
Total Loans	$ 2,756,144	$ 2,644,571
% of Total	64.90%	64.60%
Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	$ 645,954	$ 592,212
% of Total	15.20%	14.50%
Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	$ 822,652	$ 830,815
% of Total	19.40%	20.30%
Consumer [Member]
Loans [Line Items]
Total Loans	$ 22,191	$ 24,710
% of Total	0.50%	0.60%
ASC 310-30 [Member]
Loans [Line Items]
Total Loans	$ 63,527	$ 70,879	$ 112,309
ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	19,139	20,398
ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	36,878	40,393
ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	7,508	9,995
ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	2	93
Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	4,183,414	4,021,429
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,737,005	2,624,173
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	609,076	551,819
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	815,144	820,820
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	$ 22,189	$ 24,617

Loans - Loan Delinquency (Detai

Loans - Loan Delinquency (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Loans [Line Items]
Total loans	$ 4,246,941	$ 4,092,308	$ 3,702,334
Commercial Loan [Member]
Loans [Line Items]
Total loans	2,756,144	2,644,571
Commercial Real Estate [Member]
Loans [Line Items]
Total loans	645,954	592,212
Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	822,652	830,815
Consumer [Member]
Loans [Line Items]
Total loans	22,191	24,710
Originated and acquired loans [Member]
Loans [Line Items]
Total loans	4,183,414	4,021,429
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total loans	2,737,005	2,624,173
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total loans	609,076	551,819
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	815,144	820,820
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total loans	22,189	24,617
ASC 310-30 [Member]
Loans [Line Items]
Total loans	63,527	70,879	$ 112,309
ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total loans	19,139	20,398
ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total loans	36,878	40,393
ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	7,508	9,995
ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total loans	2	93
Total Loans [Member]
Loans [Line Items]
Total loans	4,246,941	4,092,308
Total Loans [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Non- accrual	26,310	24,456
Total past due and non-accrual	33,914	29,961
Current	4,149,500	3,991,468
Total loans	4,183,414	4,021,429
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Non- accrual	1,208	1,208
Total past due and non-accrual	1,563	1,208
Current	92,767	93,646
Total loans	94,330	94,854
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Non- accrual	115	121
Total past due and non-accrual	875	121
Current	17,493	19,529
Total loans	18,368	19,650
Total Loans [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Current	60,635	56,685
Total loans	60,635	56,685
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Non- accrual	6,136	5,510
Total past due and non-accrual	9,537	6,079
Current	2,010,349	1,925,068
Total loans	2,019,886	1,931,147
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Non- accrual	6,710	6,931
Total past due and non-accrual	7,364	7,824
Current	421,359	413,842
Total loans	428,723	421,666
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Non- accrual	897	572
Total past due and non-accrual	1,096	1,032
Current	434,647	379,598
Total loans	435,743	380,630
Total Loans [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Non- accrual	2,220	1,901
Total past due and non-accrual	3,534	2,361
Current	605,542	549,458
Total loans	609,076	551,819
Total Loans [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Non- accrual	8,768	7,790
Total past due and non-accrual	10,257	10,444
Current	707,162	712,592
Total loans	717,419	723,036
Total Loans [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Non- accrual	832	772
Total past due and non-accrual	1,248	1,328
Current	96,477	96,456
Total loans	97,725	97,784
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Non- accrual	14,409	13,951
Total past due and non-accrual	18,752	15,679
Current	2,718,253	2,608,494
Total loans	2,737,005	2,624,173
Total Loans [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Non- accrual	759	768
Total past due and non-accrual	1,047	1,034
Current	231,981	221,122
Total loans	233,028	222,156
Total Loans [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Non- accrual	804	742
Total past due and non-accrual	804	742
Current	54,564	48,462
Total loans	55,368	49,204
Total Loans [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Non- accrual	9,600	8,562
Total past due and non-accrual	11,505	11,772
Current	803,639	809,048
Total loans	815,144	820,820
Total Loans [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Non- accrual	81	42
Total past due and non-accrual	123	149
Current	22,066	24,468
Total loans	22,189	24,617
Total Loans [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total loans	63,527	70,879
Total Loans [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total loans	19,139	20,398
Total Loans [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total loans	36,878	40,393
Total Loans [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	7,508	9,990
Total Loans [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total loans	2	98
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Past due loans	6,245	4,610
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Past due loans	355
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Past due loans	35
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Past due loans	3,388	495
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Past due loans	124	893
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Past due loans	199	328
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Past due loans	589	328
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Past due loans	1,398	2,106
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Past due loans	416	556
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Past due loans	3,800	1,529
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Past due loans	288	141
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Past due loans	1,814	2,662
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Past due loans	42	91
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Past due loans	1,359	895
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Past due loans	725
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Past due loans	13	74
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Past due loans	530
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Past due loans		132
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	725	132
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Past due loans	91	548
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Past due loans	543	199
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Past due loans		125
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	91	548
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Past due loans		$ 16
Non Accrual [Member]
Loans [Line Items]
Non- accrual	$ 26,300

Loans - Credit Exposure for Loa

Loans - Credit Exposure for Loans as Determined by Company's Internal Risk Rating System (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Loans [Line Items]
Total Loans	$ 4,246,941	$ 4,092,308	$ 3,702,334
Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,756,144	2,644,571
Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	822,652	830,815
Consumer [Member]
Loans [Line Items]
Total Loans	22,191	24,710
Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	645,954	592,212
Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	4,183,414	4,021,429
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,737,005	2,624,173
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	815,144	820,820
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	22,189	24,617
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	609,076	551,819
ASC 310-30 [Member]
Loans [Line Items]
Total Loans	63,527	70,879	$ 112,309
ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	19,139	20,398
ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	7,508	9,995
ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	2	93
ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	36,878	40,393
Total Loans [Member]
Loans [Line Items]
Total Loans	4,246,941	4,092,308
Total Loans [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	4,183,414	4,021,429
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	2,019,886	1,931,147
Total Loans [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Total Loans	233,028	222,156
Total Loans [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total Loans	55,368	49,204
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,737,005	2,624,173
Total Loans [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	609,076	551,819
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	94,330	94,854
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	18,368	19,650
Total Loans [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Total Loans	60,635	56,685
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	428,723	421,666
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	435,743	380,630
Total Loans [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	815,144	820,820
Total Loans [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	717,419	723,036
Total Loans [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	97,725	97,784
Total Loans [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	22,189	24,617
Total Loans [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	63,527	70,879
Total Loans [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	19,139	20,398
Total Loans [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	7,508	9,990
Total Loans [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	2	98
Total Loans [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	36,878	40,393
Total Loans [Member] | Pass [Member]
Loans [Line Items]
Total Loans	4,132,532	3,973,689
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	4,074,996	3,909,304
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	1,980,564	1,890,710
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Total Loans	230,558	220,004
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total Loans	54,564	48,462
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,662,926	2,552,580
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	589,316	524,721
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	92,690	92,731
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	17,486	19,529
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Total Loans	60,119	56,685
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	397,240	393,404
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	419,021	355,776
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	800,646	807,428
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	704,303	710,972
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	96,343	96,456
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	22,108	24,575
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	57,536	64,385
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	16,452	17,579
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	5,243	7,484
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	2
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	35,839	39,322
Total Loans [Member] | Special Mention [Member]
Loans [Line Items]
Total Loans	62,530	63,975
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	60,921	62,284
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	19,051	16,531
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Total Loans	1,220	1,260
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	40,212	34,140
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	16,837	24,158
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	432	915
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	767
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Total Loans	516
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	19,941	16,349
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	15,122	23,243
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	3,872	3,986
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	3,455	3,571
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	417	415
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	1,609	1,691
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	518	537
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	849	908
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	242	246
Total Loans [Member] | Substandard [Member]
Loans [Line Items]
Total Loans	50,388	53,527
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	46,006	48,724
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	18,934	22,919
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Total Loans	1,218	847
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total Loans	804	742
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	32,413	36,336
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	2,886	2,940
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	1,208	1,208
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	115	121
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	11,457	11,828
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	1,563	1,611
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	10,626	9,406
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	9,661	8,493
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	965	913
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	81	42
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	4,382	4,803
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,169	2,282
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	1,416	1,598
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans		98
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	797	825
Total Loans [Member] | Doubtful [Member]
Loans [Line Items]
Total Loans	1,491	1,117
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	1,491	1,117
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	1,337	987
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Food and Agriculture [Member]
Loans [Line Items]
Total Loans	32	45
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	1,454	1,117
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	37
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	85	$ 85
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	$ 37

Loans - Additional Information

Loans - Additional Information Regarding Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Loans [Line Items]
Unpaid principal balance, Total	$ 44,549	$ 42,726
Recorded investment of impaired loans	32,743	31,079
Loans and Leases Receivable, Allowance	1,546	1,169
Commercial and Industrial [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	4,558	4,374
Recorded investment with no related allowance recorded	3,173	3,029
Unpaid principal balance of impaired loans with an allowance recorded	7,736	7,252
Recorded investment of impaired loans with an allowance recorded	5,109	4,627
Allowance for loan losses allocated with an allowance recorded	1,348	996
Food and Agriculture [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	1,468	1,468
Recorded investment with no related allowance recorded	1,220	1,260
Unpaid principal balance of impaired loans with an allowance recorded	997	883
Recorded investment of impaired loans with an allowance recorded	960	845
Allowance for loan losses allocated with an allowance recorded	33	46
Energy Loans [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	5,429	5,366
Recorded investment with no related allowance recorded	804	742
Commercial Loan [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	18,430	18,338
Recorded investment with no related allowance recorded	11,602	11,640
Unpaid principal balance of impaired loans with an allowance recorded	10,050	9,497
Recorded investment of impaired loans with an allowance recorded	7,184	6,641
Allowance for loan losses allocated with an allowance recorded	1,471	1,132
Commercial Construction [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	1,435	1,435
Recorded investment with no related allowance recorded	1,208	1,208
Commercial Acquisition/Development [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	377	378
Recorded investment with no related allowance recorded	115	121
Owner-Occupied [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	6,975	7,130
Recorded investment with no related allowance recorded	6,405	6,609
Unpaid principal balance of impaired loans with an allowance recorded	1,317	1,362
Recorded investment of impaired loans with an allowance recorded	1,115	1,169
Allowance for loan losses allocated with an allowance recorded	90	90
Non Owner-Occupied [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	642	641
Recorded investment with no related allowance recorded	546	547
Unpaid principal balance of impaired loans with an allowance recorded	620	313
Recorded investment of impaired loans with an allowance recorded	561	254
Allowance for loan losses allocated with an allowance recorded	39	2
Total Commercial Real Estate [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	2,454	2,454
Recorded investment with no related allowance recorded	1,869	1,876
Unpaid principal balance of impaired loans with an allowance recorded	620	313
Recorded investment of impaired loans with an allowance recorded	561	254
Allowance for loan losses allocated with an allowance recorded	39	2
Senior lien
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	4,667	4,229
Recorded investment with no related allowance recorded	4,310	3,814
Unpaid principal balance of impaired loans with an allowance recorded	6,492	6,032
Recorded investment of impaired loans with an allowance recorded	5,582	5,178
Allowance for loan losses allocated with an allowance recorded	28	27
Junior lien
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	430	409
Recorded investment with no related allowance recorded	358	341
Unpaid principal balance of impaired loans with an allowance recorded	1,320	1,408
Recorded investment of impaired loans with an allowance recorded	1,196	1,293
Allowance for loan losses allocated with an allowance recorded	8	8
Residential Real Estate Segment [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	5,097	4,638
Recorded investment with no related allowance recorded	4,668	4,155
Unpaid principal balance of impaired loans with an allowance recorded	7,812	7,440
Recorded investment of impaired loans with an allowance recorded	6,778	6,471
Allowance for loan losses allocated with an allowance recorded	36	35
Consumer [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	86	46
Recorded investment with no related allowance recorded	81	42
Impaired Loans With No Related Allowance Recorded [Member] [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	26,067	25,476
Recorded investment with no related allowance recorded	18,220	17,713
Impaired Loans With Related Allowance Recorded [Member]
Loans [Line Items]
Unpaid principal balance of impaired loans with an allowance recorded	18,482	17,250
Recorded investment of impaired loans with an allowance recorded	14,523	13,366
Allowance for loan losses allocated with an allowance recorded	$ 1,546	$ 1,169

Loans - Impaired Loans - Averag

Loans - Impaired Loans - Average Recorded Investment and Interest Income Recognized (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Loans [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 32,852	$ 35,057
Impaired Financing Receivable, Interest Income, Cash Basis Method	96	161
Commercial and Industrial [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	3,189	5,534
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	12	83
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5,113	4,339
Owner-Occupied [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	6,425	7,487
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	3	18
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,125	1,265
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	4	5
Food and Agriculture [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,220	1,259
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	1	6
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	961	2,126
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		1
Energy Loans [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	777	2,353
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		20
Commercial Loan [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	11,611	16,633
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	16	127
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	7,199	7,730
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	4	6
Commercial Construction [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,208
Commercial Acquisition/Development [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	117	886
Multifamily [Member]
Loans [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		29
Non Owner-Occupied [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	546	876
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		4
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	566	196
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	9	2
Total Commercial Real Estate [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,871	1,762
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		4
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	566	225
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	9	2
Senior lien
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	4,325	1,612
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	2
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5,629	5,601
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	25	13
Junior lien
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	363	305
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,205	1,151
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	40	9
Residential Real Estate Segment [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	4,688	1,917
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	2
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	6,834	6,752
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	65	22
Consumer [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	11	14
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	72	24
Impaired Loans With No Related Allowance Recorded [Member] [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	18,181	20,326
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	18	131
Impaired Loans With Related Allowance Recorded [Member]
Loans [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	14,671	14,731
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	$ 78	$ 30

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructuring and Loans Accounted for Under ASC Topic 310-30 Narratives (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)item	Mar. 31, 2018item
Troubled Debt Restructurings [Member]
Debt Instrument [Line Items]
TDR's modified within the past year that defaulted on their restructured terms | item	2	1
Number of restructured loans | item	4
Recorded investment | $	$ 0.4
Agriculture and Consumer loans [Member]
Debt Instrument [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0.2

Loans - Additional Informatio_2

Loans - Additional Information Related to Accruing TDR's (Details) - Accruing TDR [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Loans [Line Items]
Recorded investment	$ 2,207	$ 4,073
Average year-to- date recorded investment	2,220	4,250
Unpaid principal balance	2,379	4,556
Unfunded commitments to fund TDRs	162	12
Commercial [Member]
Loans [Line Items]
Recorded investment	941	2,730
Average year-to- date recorded investment	943	2,827
Unpaid principal balance	1,061	3,155
Unfunded commitments to fund TDRs	150
Commercial Real Estate [Member]
Loans [Line Items]
Recorded investment	195	229
Average year-to- date recorded investment	198	260
Unpaid principal balance	240	280
Residential Real Estate Segment [Member]
Loans [Line Items]
Recorded investment	1,071	1,114
Average year-to- date recorded investment	1,079	1,163
Unpaid principal balance	1,078	1,121
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	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	$ 3,495	$ 3,438
Amount of increase in non-accrual TDRs	100
Commercial [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	1,667	1,854
Residential Real Estate Segment [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	$ 1,828	$ 1,584

Loans - Re-Measurement of Loans

Loans - Re-Measurement of Loans Accounted for Under ASC Topic 310-30 Resulting in Changes in Carrying Amount of Accretable Yield (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield beginning balance	$ 35,901	$ 46,568
Reclassification from non-accretable difference	1,524	5,409
Reclassification to non-accretable difference	(421)	(1,390)
Accretion	(3,687)	(5,394)
Accretable yield ending balance	$ 33,317	$ 45,193

Loans - Composition of Net Book

Loans - Composition of Net Book Value for Loans Accounted for under ASC Topic 310-30 (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Contractual cash flows	$ 409,942	$ 420,994
Non-accretable difference	(313,098)	(314,214)
Accretable yield	(33,317)	(35,901)
Loans accounted for under ASC 310-30	$ 63,527	$ 70,879

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Company's Allowance for Loan Losses ("All") and Recorded Investment in Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 35,692	$ 31,264
Provision (recoupment) for loan losses	1,534	41
Ending balance	37,055	30,686
Carrying amount of loan investments			$ 4,246,941	$ 4,092,308	$ 3,702,334
Loans	35,692	31,264	37,055	35,692	30,686
Total Loans			4,246,941	4,092,308	3,702,334
Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	35,461	31,193
Charge-offs	(268)	(716)
Recoveries	97	97
Provision (recoupment) for loan losses	1,550	0
Ending balance	36,840	30,574
Carrying amount of loan investments			4,183,414	4,021,429
Loans	35,461	31,193	36,840	35,461	30,574
Total Loans			4,183,414	4,021,429
Originated and acquired loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending allowance balance individually evaluated for impairment			1,546		1,218
Ending allowance balance collectively evaluated for impairment			35,294		29,355
Loans individually evaluated for impairment			32,743		34,672
Loans collectively evaluated for impairment			4,150,671		3,555,353
ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	231	71
Provision (recoupment) for loan losses	(16)	41
Ending balance	215	112
Carrying amount of loan investments			63,527	70,879	112,309
Loans	231	71	215	231	112
Total Loans			63,527	70,879	112,309
ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance		113
Loans		113			113
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	27,137	21,385
Ending balance	28,075	21,578
Carrying amount of loan investments			2,756,144		2,105,899
Loans	27,137	21,385	28,075	27,137	21,578
Total Loans			2,756,144		2,105,899
Commercial Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	26,946	21,340
Charge-offs	(12)	(437)
Recoveries	27	42
Provision (recoupment) for loan losses	933	540
Ending balance	27,894	21,485
Loans	26,946	21,340	27,894	26,946	21,485
Commercial Portfolio Segment [Member] | Originated and acquired loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending allowance balance individually evaluated for impairment			1,471		1,185
Ending allowance balance collectively evaluated for impairment			26,423		20,300
Loans individually evaluated for impairment			18,786		24,175
Loans collectively evaluated for impairment			2,718,219		2,057,022
Commercial Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	191	45
Provision (recoupment) for loan losses	(10)	48
Ending balance	181	93
Carrying amount of loan investments			19,139		24,702
Loans	191	45	181	191	93
Total Loans			19,139		24,702
Commercial Portfolio Segment [Member] | ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance		93
Loans		93			93
Residential Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,800	3,965
Ending balance	3,718	3,928
Carrying amount of loan investments			822,652		859,155
Loans	3,800	3,965	3,718	3,800	3,928
Total Loans			822,652		859,155
Residential Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,760	3,965
Charge-offs	(23)
Recoveries	13	2
Provision (recoupment) for loan losses	(66)	(39)
Ending balance	3,684	3,928
Loans	3,760	3,965	3,684	3,760	3,928
Residential Portfolio Segment [Member] | Originated and acquired loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending allowance balance individually evaluated for impairment			36		31
Ending allowance balance collectively evaluated for impairment			3,648		3,897
Loans individually evaluated for impairment			4,583		8,558
Loans collectively evaluated for impairment			810,561		838,597
Residential Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	40
Provision (recoupment) for loan losses	(6)
Ending balance	34
Carrying amount of loan investments			7,508		12,000
Loans	40		34	40
Total Loans			7,508		12,000
Consumer Loan [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	349	305
Ending balance	348	290
Carrying amount of loan investments			22,191		26,565
Loans	349	305	348	349	290
Total Loans			22,191		26,565
Consumer Loan [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	349	305
Charge-offs	(233)	(279)
Recoveries	46	53
Provision (recoupment) for loan losses	186	211
Ending balance	348	290
Loans	349	305	348	349	290
Consumer Loan [Member] | Originated and acquired loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending allowance balance collectively evaluated for impairment			348		290
Loans individually evaluated for impairment			6,944		38
Loans collectively evaluated for impairment			15,245		26,197
Consumer Loan [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Carrying amount of loan investments			2		330
Total Loans			2		330
Commercial Real Estate Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,406	5,609
Ending balance	4,914	4,890
Carrying amount of loan investments			645,954		710,715
Loans	4,406	5,609	4,914	4,406	4,890
Total Loans			645,954		710,715
Commercial Real Estate Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,406	5,583
Recoveries	11
Provision (recoupment) for loan losses	497	(712)
Ending balance	4,914	4,871
Loans	$ 4,406	5,583	4,914	$ 4,406	4,871
Commercial Real Estate Portfolio Segment [Member] | Originated and acquired loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending allowance balance individually evaluated for impairment			39		2
Ending allowance balance collectively evaluated for impairment			4,875		4,868
Loans individually evaluated for impairment			2,430		1,901
Loans collectively evaluated for impairment			606,646		633,537
Commercial Real Estate Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		26
Provision (recoupment) for loan losses		(7)
Ending balance		19
Carrying amount of loan investments			36,878		75,277
Loans		26			19
Total Loans			$ 36,878		75,277
Commercial Real Estate Portfolio Segment [Member] | ASC 310-30 [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance		20
Loans		$ 20			$ 20

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Allowance For Loan And Lease Losses [Line Items]
Provision (recoupment) for loan losses	$ 1,534	$ 41
Originated and acquired loans [Member]
Allowance For Loan And Lease Losses [Line Items]
Charge-offs, net	200
Provision (recoupment) for loan losses	1,550	0
ASC 310-30 [Member]
Allowance For Loan And Lease Losses [Line Items]
Provision (recoupment) for loan losses	$ (16)	$ 41

Leases - ASC Topic 842 - (Detai

Leases - ASC Topic 842 - (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Mar. 31, 2019		Mar. 31, 2018	[2]
Leases
Lease right-of-use		$ 29,400
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]		Other Assets [Member]
Lease liabilities		$ 29,406
Operating Lease, Liability, Statement of Financial Position [Extensible List]		Other Liabilities [Member]
Cumulative effect of adjustment to retained earnings		$ 256	[1]	$ 26
Weighted-average remaining lease term (in years)		5 years 3 months 18 days
Weighted-average discount rate (in percent)		3.42%
Rent expense		$ 1,400
Remaining undiscounted cash flows
For the nine months ending December 31, 2019		4,295
For the year ending December 31, 2020		5,172
For the year ending December 31, 2021		4,843
For the year ending December 31, 2022		4,324
For the year ending December 31, 2023		3,921
Thereafter		16,570
Total lease payments		39,125
Less: Imputed interest		9,719
Present value of operating lease liabilities		$ 29,406
Maximum
Leases
Term of lease (in years)		9 years
Minimum
Leases
Term of lease (in years)		1 year
2016-02
Leases
Lease right-of-use	$ 30,500
Lease liabilities	30,500
Cumulative effect of adjustment to retained earnings	300
Remaining undiscounted cash flows
Present value of operating lease liabilities	$ 30,500
[1]	Related to the adoption of Accounting Standards Update No. 2016-02, Leases. Refer to note 2 - Recent Accounting Pronouncements of our consolidated financial statements for further details.
[2]	Related to the adoption of Accounting Standards Update No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.

Leases - ASC Topic 840 - (Detai

Leases - ASC Topic 840 - (Details) $ in Thousands	Dec. 31, 2018USD ($)
Future minimum lease payments
2019	$ 3,092
2020	2,981
2021	3,091
2022	3,052
2023	2,047
Thereafter	10,163
Total	$ 24,426

Other Real Estate Owned - Summa

Other Real Estate Owned - Summary of Activity in OREO Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Real Estate [Roll Forward]
Ending balance	$ 10,596	$ 10,491
Acquired through acquisition		1,409
Transfers from loan portfolio, at fair value	288	127
Impairments	(596)	(38)
Sales	(894)	(114)
Beginning balance	$ 9,394	$ 11,875

Other Real Estate Owned - Narra

Other Real Estate Owned - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
FDIC Loss-Sharing Related
Decrease in OREO	$ 1,200
OREO sales	894	$ 114
Gain on OREO sales, net	$ 368	$ (78)

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)item	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Jan. 01, 2018USD ($)
Goodwill and Intangible Assets
Goodwill acquired	$ 115,027		$ 115,027
Amortization of acquired identifiable intangibles	296	$ 653
Mortgage loans serviced	376,000	441,000
Mortgage service fees	300	300
Peoples Inc [Member]
Goodwill and Intangible Assets
Goodwill acquired				$ 55,397
Core Deposits
Goodwill and Intangible Assets
Intangible assets acquired	48,800			10,500
Amortization of acquired identifiable intangibles	300	700
Accumulated amortization	$ 39,215		$ 38,920
Core Deposits | Minimum
Goodwill and Intangible Assets
Amortization period	7 years
Core Deposits | Maximum
Goodwill and Intangible Assets
Amortization period	10 years
Core Deposits | Peoples Inc [Member]
Goodwill and Intangible Assets
Intangible assets acquired				10,477
Mortgage servicing rights
Goodwill and Intangible Assets
Intangible assets acquired				4,300
Amortization of acquired identifiable intangibles	$ 153	$ 171
Mortgage servicing rights | Measurement Input, Discount Rate [Member] | Minimum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent) | item	0.095
Mortgage servicing rights | Measurement Input, Discount Rate [Member] | Maximum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent) | item	0.105
Mortgage servicing rights | Measurement Input, Constant Prepayment Rate [Member] | Minimum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent) | item	0.134
Mortgage servicing rights | Measurement Input, Constant Prepayment Rate [Member] | Maximum
Goodwill and Intangible Assets
Servicing assets measurement input (as a percent) | item	0.198
Mortgage servicing rights | Peoples Inc [Member]
Goodwill and Intangible Assets
Intangible assets acquired				$ 4,301

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Carrying Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Core Deposits
Carrying amount of intangible assets
Gross carrying amount	$ 48,834	$ 48,834
Accumulated amortization	39,215	38,920
Net carrying amount	9,619	9,914
Mortgage servicing rights
Carrying amount of intangible assets
Net carrying amount	$ 3,362	$ 3,556	$ 4,130

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Changes in Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Changes in the mortgage servicing rights
Amortization	$ (296)	$ (653)
Mortgage servicing rights
Changes in the mortgage servicing rights
Beginning balance	3,556
Acquired through acquisition		4,301
Originations	13
Impairment	(54)
Amortization	(153)	(171)
Ending balance	3,362	4,130
Fair value of mortgage servicing rights	$ 3,564	$ 4,712

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Summary of Estimated Future Amortization Expense (Details) $ in Thousands	Mar. 31, 2019USD ($)
Core Deposits
Estimated future amortization expense
For the nine months ending December 31, 2019	$ 887
For the year ending December 31, 2020	1,183
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
Mortgage servicing rights
Estimated future amortization expense
For the nine months ending December 31, 2019	449
For the year ending December 31, 2020	519
For the year ending December 31, 2021	427
For the year ending December 31, 2022	351
For the year ending December 31, 2023	$ 288

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 11,500		$ 5,900
Amount of repurchase agreements	$ 59,500		66,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date, Earliest	2019
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date, Last	2020
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	$ 1,100
FHLB line of credit advances	161,100		234,300
FHLB advances	67,300		67,300
Loans pledged	1,600,000		1,600,000
Interest expense related to FHLB advances	$ 1,500	$ 460
Minimum
Assets Sold under Agreements to Repurchase [Line Items]
Interest rate range of FHLB advances	1.55%
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	$ 16,400		16,000
Maturity on Demand [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Amount of repurchase agreements	0
U.S. Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 72,900		$ 73,900

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, 2019	Dec. 31, 2018
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	10.60%	10.50%
Common equity risk-based ratio	12.80%	12.90%
Risk-based capital Ratio	12.80%	12.90%
Total risk-based capital Ratio	13.70%	13.80%
Leverage Amount	$ 595,782	$ 580,504
Common equity risk-based amount	595,782	580,504
Risk-based capital amount	595,782	580,504
Total risk-based capital Amount	$ 636,902	$ 620,275
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	$ 224,123	$ 220,988
Required to be considered adequately capitalized common equity capital amount	392,215	386,728
Required to be considered adequately capitalized risk-based capital Amount	394,452	382,306
Required to be considered adequately capitalized Total risk-based capital Amount	$ 487,264	$ 472,261
NBH Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage Ratio	8.90%	9.00%
Common equity risk-based ratio	10.80%	11.10%
Risk-based capital Ratio	10.80%	11.10%
Total risk-based capital Ratio	11.70%	12.00%
Leverage Amount	$ 499,314	$ 498,283
Common equity risk-based amount	499,314	498,283
Risk-based capital amount	499,314	498,283
Total risk-based capital Amount	$ 540,434	$ 538,054
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	$ 279,602	$ 275,703
Required to be considered well capitalized common equity capital amount	363,483	358,414
Required to be considered well capitalized risk-based capital Amount	370,298	358,938
Required to be considered well capitalized Total risk-based capital Amount	$ 462,872	$ 448,672
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	$ 223,682	$ 220,563
Required to be considered adequately capitalized common equity capital amount	391,443	385,984
Required to be considered adequately capitalized risk-based capital Amount	393,441	381,372
Required to be considered adequately capitalized Total risk-based capital Amount	$ 486,016	$ 471,106

Revenue from Contracts with C_3

Revenue from Contracts with Clients - Non-interest income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenue from Contracts with Clients
(Gain) loss on OREO sales, net	$ (368)	$ 78
Service Charges and other fees
Revenue from Contracts with Clients
Non-interest income	4,321	4,510
Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,428	3,362
ASU 2014-09
Revenue from Contracts with Clients
Non-interest income	17,051	17,835
Contract balances	0		$ 0
ASU 2014-09 | In-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	8,271	8,537
(Gain) loss on OREO sales, net	368	(78)
Total Revenue	7,903	8,615
ASU 2014-09 | In-scope of Topic 606 | Service Charges and other fees
Revenue from Contracts with Clients
Non-interest income	4,843	5,175
ASU 2014-09 | In-scope of Topic 606 | Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,428	3,362
ASU 2014-09 | Out-of-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	$ 8,780	$ 9,298

Stock-based Compensation and Em

Stock-based Compensation and Employee Benefits - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 500,000
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	$ 47,000	$ 173,000
Unrecognized compensation expense	$ 500,000
Unrecognized compensation cost, weighted-average period, years	1 year 10 months 24 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	3,749
Weighted average grant-date fair value, Granted (in dollars per share)	$ 35.75
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	$ 200,000	400,000
Unrecognized compensation expense	$ 1,500,000
Unrecognized compensation cost, weighted-average period, years	2 years
Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 200,000	$ 200,000
Unrecognized compensation expense	$ 1,800,000
Unrecognized compensation cost, weighted-average period, years	1 year 8 months 12 days
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]
Number of shares authorized	400,000
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
Employees purchased shares (in shares)	6,201	5,960
Shares available for issuance	336,443
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
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	3 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

Stock-based Compensation and _3

Stock-based Compensation and Benefits - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Options, beginning	1,264,876
Granted, Options	3,749
Exercised, Options	(117,618,000)
Forfeited, Options	(40,023)
Outstanding Options, ending	1,110,984	1,264,876
Options fully vested and exercisable at end of period, Options	892,922
Options expected to vest, Options	1,093,498
Outstanding, Weighted average exercise price, beginning	$ 22.33
Granted, Weighted average exercise price	35.75
Exercised, Weighted average exercise price	20.37
Forfeited, Weighted average exercise price	30.72
Outstanding, Weighted average exercised price, ending	22.28	$ 22.33
Options fully vested and exercisable at end of period, Weighted average exercise price	20.14
Options expected to vest, Weighted average exercise price	$ 22.11
Outstanding, Weighted average remaining contractual term in years	3 years 8 months 5 days	3 years 11 months 1 day
Options fully vested and exercisable at end of period, weighted average remaining contractual term in years	2 years 6 months 11 days
Options expected to vest, Weighted average remaining contractual term in years	3 years 7 months 6 days
Outstanding, Aggregate intrinsic value, beginning	$ 11,387
Outstanding, Outstanding, Aggregate intrinsic value, beginning	12,292	$ 11,387
Aggregate intrinsic Value of Options fully vested and exercisable at end of period	11,731
Options expected to vest, Aggregate Intrinsic Value	$ 12,282

Stock-based Compensation and _4

Stock-based Compensation and Benefits - Summary of Restricted Stock Activity (Details)	3 Months Ended
	Mar. 31, 2019$ / 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	146,494
Unvested Restricted shares, Granted (in shares) | shares	3,749
Unvested Restricted shares, Vested (in shares) | shares	(26,594)
Unvested Restricted shares, Forfeited (in shares) | shares	(15,863)
Unvested Restricted shares, Ending (in shares) | shares	107,786
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	$ 28.19
Weighted average grant-date fair value, Granted (in dollars per share) | $ / shares	35.75
Weighted average grant-date fair value, Vested (in dollars per share) | $ / shares	11.28
Weighted average grant-date fair value, Forfeited (in dollars per share) | $ / shares	31.57
Weighted average grant-date fair value, Ending (in dollars per share) | $ / shares	$ 32.13
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	192,049
Unvested Restricted shares, Net adjustment due to performance (in shares) | shares	22,246
Unvested Restricted shares, Vested (in shares) | shares	(95,308)
Unvested Restricted shares, Forfeited (in shares) | shares	(19,401)
Unvested Restricted shares, Ending (in shares) | shares	99,586
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	$ 26.40
Weighted average grant-date fair value, Net adjustment due to performance (in dollars per share) | $ / shares	17.36
Weighted average grant-date fair value, Vested (in dollars per share) | $ / shares	18.02
Weighted average grant-date fair value, Forfeited (in dollars per share) | $ / shares	31.54
Weighted average grant-date fair value, Ending (in dollars per share) | $ / shares	$ 31.40

Common Stock - Narrative (Detai

Common Stock - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Aug. 05, 2016
Schedule Of Common Stock [Line Items]
Shares outstanding	30,958,581	30,769,063
Common Class A [Member]
Schedule Of Common Stock [Line Items]
Shares outstanding	30,958,581	30,769,063
Restricted issued but not yet vested, shares	107,786	146,494
New Board Authorized Share Repurchase Program
Schedule Of Common Stock [Line Items]
Stock repurchase program, authorized amount			$ 50
Remaining authorized amount	$ 12.6

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Earnings Per Share
Shares outstanding	30,958,581	30,479,969
Outstanding stock options to purchase common stock	1,110,984	1,516,044	1,264,876
Outstanding stock options to purchase common stock, per share	$ 22.28	$ 21.89	$ 22.33
Restricted shares outstanding	207,372	418,638

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, 2019	Mar. 31, 2018
Earnings Per Share
Net income	$ 18,922	$ 8,464
Less: income allocated to participating securities	(18)	(13)
Income allocated to common shareholders	$ 18,904	$ 8,451
Weighted average shares outstanding for basic earnings per common share	30,961,187	30,493,689
Dilutive effect of equity awards	536,351	649,839
Weighted average shares outstanding for diluted earnings per common share	31,497,538	31,143,528
Basic earnings per share (in dollars per share)	$ 0.61	$ 0.28
Diluted earnings per share (in dollars per share)	$ 0.60	$ 0.27

Derivatives - FV of Derivatives

Derivatives - FV of Derivatives on the Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	$ 9,102	$ 17,436
Liability derivatives fair value	2,414	228
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	6,485	4,062
Liability derivatives fair value	6,169	3,893
Other assets [Member] | Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	9,102	17,436
Other assets [Member] | Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	4,933	3,191
Other assets [Member] | Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	1,539	871
Other assets [Member] | Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	13
Other liabilities [Member] | Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Liability derivatives fair value	2,414	228
Other liabilities [Member] | Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Liability derivatives fair value	5,358	3,349
Other liabilities [Member] | Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Liability derivatives fair value	110	72
Other liabilities [Member] | Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Liability derivatives fair value	$ 701	$ 472

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Termination value of derivatives in net liability position	$ 1.2
Hedged Loans	530.9	$ 522.7
Cumulative fair value hedge adjustment	3	13.2
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Notional amount	96.9
Interest Rate Lock Commitments Notional Amount Member
Derivative [Line Items]
Notional amount		50.1
Forward Contract Notional [Member]
Derivative [Line Items]
Notional amount	118.6	77.6
Designated as Hedging Instrument [Member] | Interest rate swap derivatives [Member]
Derivative [Line Items]
Notional amount	471.8	473.4
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest rate swap derivatives [Member]
Derivative [Line Items]
Notional amount	$ 486.4	$ 206.8

Derivatives - Derivatives on th

Derivatives - Derivatives on the Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivatives	$ 625	$ 1,605
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivatives	10,136	12,052
Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of (loss) recognized in income on hedged items	(10,515)	(11,917)
Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Non-Interest expense [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivatives	273	122
Interest rate products [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest income [Member]
Derivative [Line Items]
Amount of (loss) recognized in income on hedged items	(10,515)	(11,917)
Interest rate products [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivatives	10,136	12,052
Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Mortgage banking income [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivatives	(800)	1,108
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Mortgage banking income [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivatives	$ 1,152	$ 375

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Commitment And Contingencies [Line Items]
Loan commitments	$ 738.4		$ 773.5
Mortgage Repurchase Reserve	3.4	$ 4.3
Standby Letters of Credit [Member]
Commitment And Contingencies [Line Items]
Standby letters of credit	$ 11.2		$ 10.6

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Total Unfunded Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Commitment And Contingencies [Line Items]
Total unfunded commitments	$ 749,549	$ 784,077
Commitments to fund loans [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	204,282	183,946
Unfunded Commitment Line Of Credit [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	534,112	589,573
Commercial And Standby Letters Of Credit [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	$ 11,155	$ 10,558

Fair Value Measurements - Table

Fair Value Measurements - Tables of Financial Instruments Measured At Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 823,810	$ 860,082
Total liabilities at fair value	8,583	4,121
Loans held for sale member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	59,324	48,120
Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	441	441
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	134,488	146,642
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	613,970	643,381
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	822,258	859,211
Total liabilities at fair value	7,772	3,577
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	59,324	48,120
Level 2 [Member] | Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	441	441
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	134,488	146,642
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	613,970	643,381
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	1,552	871
Total liabilities at fair value	811	544
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	14,035	20,627
Total liabilities at fair value	7,772	3,577
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	14,035	20,627
Total liabilities at fair value	7,772	3,577
Mortgage banking derivatives | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	1,552	871
Total liabilities at fair value	811	544
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	1,552	871
Total liabilities at fair value	$ 811	$ 544

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, 2019USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 327
Gain included in earnings, net	414
Ending Balance	$ 741

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)loan	Mar. 31, 2018USD ($)loan	Dec. 31, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 4,246,941	$ 3,702,334	$ 4,092,308
Impairment on other real estate owned	$ 596	$ 38
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of Loans measured | loan	6	6
Loans	$ 5,600	$ 6,400
Nonrecurring Loans Reserves	1,500	1,200
Mortgage servicing rights member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment on other real estate owned	$ 100	$ 0

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, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 823,810		$ 860,082
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	45,499	$ 50,677
Losses From Fair Value Changes	895	753
Impaired loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	32,743	34,672
Losses From Fair Value Changes	245	715
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	9,394	11,875
Losses From Fair Value Changes	596	38
Mortgage servicing rights member | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	3,362	$ 4,130
Losses From Fair Value Changes	$ 54

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, 2019item
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
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)	13.4
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)	0.25
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)	19.8

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS:
Cash and cash equivalents	$ 105,258	$ 109,556
Investment securities available-for-sale (at fair value)	749,537	791,102
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	221,727	235,398
Non-marketable securities	24,574	27,555
Loans held-for-sale	59,324	48,120
LIABILITIES:
Time deposits	1,081,092	1,080,529
Securities sold under agreements to repurchase	59,543	66,047
Federal Home Loan Bank advances	228,421	301,660
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)	134,488	146,642
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	147,221	157,115
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	613,970	643,381
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	74,506	78,283
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)	610	610
Carrying Amount [Member] | Level 1 [Member]
ASSETS:
Cash and cash equivalents	105,258	109,556
Carrying Amount [Member] | Level 2 [Member]
ASSETS:
Non-marketable securities	24,574	27,555
Loans held-for-sale	59,324	48,120
Accrued interest receivable	22,362	17,852
LIABILITIES:
Deposit transaction accounts	3,633,356	3,445,092
Time deposits	1,081,092	1,080,529
Securities sold under agreements to repurchase	59,543	66,047
Federal Home Loan Bank advances	228,421	301,660
Accrued interest payable	8,731	6,889
Carrying Amount [Member] | Level 3 [Member]
ASSETS:
Loans receivable, net	4,246,941	4,092,308
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)	134,488	146,642
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	147,221	157,115
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)	613,970	643,381
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	74,506	78,283
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	441	441
Carrying Amount [Member] | Municipal [Member] | Level 3 [Member]
ASSETS:
Municipal obligations	169	169
Estimated Fair Value [Member] | Level 1 [Member]
ASSETS:
Cash and cash equivalents	105,258	109,556
Estimated Fair Value [Member] | Level 2 [Member]
ASSETS:
Non-marketable securities	24,574	27,555
Loans held-for-sale	59,324	48,120
Accrued interest receivable	22,362	17,852
LIABILITIES:
Deposit transaction accounts	3,633,356	3,445,092
Time deposits	1,072,986	1,068,233
Securities sold under agreements to repurchase	59,543	66,047
Federal Home Loan Bank advances	228,810	301,933
Accrued interest payable	8,731	6,889
Estimated Fair Value [Member] | Level 3 [Member]
ASSETS:
Loans receivable, net	4,279,916	4,082,146
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)	134,488	146,642
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	146,316	154,412
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)	613,970	643,381
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	73,291	76,514
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	441	441
Estimated Fair Value [Member] | Municipal [Member] | Level 3 [Member]
ASSETS:
Municipal obligations	169	169
Interest rate swap derivatives [Member] | Carrying Amount [Member] | Level 2 [Member]
ASSETS:
Derivative asset	14,035	20,627
LIABILITIES:
Derivative liability	7,772	3,577
Interest rate swap derivatives [Member] | Estimated Fair Value [Member] | Level 2 [Member]
ASSETS:
Derivative asset	14,035	20,627
LIABILITIES:
Derivative liability	7,772	3,577
Mortgage banking derivatives | Carrying Amount [Member] | Level 3 [Member]
ASSETS:
Derivative asset	1,552	871
LIABILITIES:
Derivative liability	811	544
Mortgage banking derivatives | Estimated Fair Value [Member] | Level 3 [Member]
ASSETS:
Derivative asset	1,552	871
LIABILITIES:
Derivative liability	$ 811	$ 544

Acquisition Activities - Narrat

Acquisition Activities - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 01, 2018	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Closing price	$ 32.43
Acquisition related expenses			$ (7,957)
Amortization of acquired identifiable intangibles		$ 296	653
Peoples Inc [Member]
Business Acquisition [Line Items]
Cash	$ 36,189
Cash consideration	3,398,477
Restricted cash placed in escrow	$ 10,000
Restricted Cash, Asset, Statement of Financial Position [Extensible List]		Other Assets [Member]
Transaction value	146,402
Mortgage repurchase reserve	4,000
Gross contractual amounts receivable	713,600
Loans not expected to be collected	$ 2,100
Acquisition related expenses			$ 7,600

Acquisition Activities - Summar

Acquisition Activities - Summary of Net Assets Acquired (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 01, 2018	Mar. 31, 2019	Dec. 31, 2018
Consideration:
Goodwill		$ 115,027	$ 115,027
Closing price	$ 32.43
Core Deposits
Assets:
Intangible asset	$ 10,500	$ 48,800
Mortgage servicing rights
Assets:
Intangible asset	4,300
Peoples Inc [Member]
Assets:
Cash and due from banks	105,173
Investment securities available-for-sale (at fair value)	118,512
Non-marketable securities	4,796
Loans, net	542,707
Loans held for sale	54,260
Other real estate owned	1,253
Premises and equipment, net	18,584
Other assets	15,361
Total assets acquired	875,424
Liabilities:
Total deposits	729,911
FHLB borrowings	33,825
Other liabilities	20,683
Total liabilities assumed	784,419
Identifiable net assets acquired	91,005
Consideration:
Common stock paid	110,213
Cash	36,189
Total Consideration	146,402
Goodwill	55,397
Peoples Inc [Member] | Core Deposits
Assets:
Intangible asset	$ 10,477
Amortization period for intangible assets	10 years
Peoples Inc [Member] | Mortgage servicing rights
Assets:
Intangible asset	$ 4,301