National Bank (NBHC) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 06, 2018
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	NBHC
Entity Registrant Name	National Bank Holdings Corp
Entity Central Index Key	1,475,841
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		30,735,284
Entity Current Reporting Status	Yes

Consolidated Statements of Fina

Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 137,417	$ 193,297
Interest bearing bank deposits	500	64,067
Cash and cash equivalents	137,917	257,364
Investment securities available-for-sale (at fair value)	856,751	855,345
Investment securities held-to-maturity (at amortized cost)	266,197	258,730
Non-marketable securities	20,070	15,030
Loans	3,825,555	3,178,947
Allowance for loan losses	(32,230)	(31,264)
Loans, net	3,793,325	3,147,683
Loans held for sale	113,057	4,629
Other real estate owned	35,469	10,491
Premises and equipment, net	111,415	93,708
Goodwill	115,027	59,630
Intangible assets, net	14,693	1,607
Other assets	183,335	139,248
Total assets	5,647,256	4,843,465
Liabilities:
Non-interest bearing demand deposits	1,099,601	902,439
Interest bearing demand deposits	682,998	474,607
Savings and money market	1,716,534	1,484,463
Time deposits	1,132,331	1,118,050
Total deposits	4,631,464	3,979,559
Securities sold under agreements to repurchase	73,441	130,463
Federal Home Loan Bank advances	188,334	129,115
Other liabilities	93,832	71,921
Total liabilities	4,987,071	4,311,058
Shareholders' equity:
Common stock	515	515
Additional paid in capital	1,012,175	970,668
Retained earnings	81,182	60,795
Treasury stock at cost	(416,281)	(493,329)
Accumulated other comprehensive loss, net of tax	(17,406)	(6,242)
Total shareholders' equity	660,185	532,407
Total liabilities and shareholders' equity	$ 5,647,256	$ 4,843,465

Consolidated Statements of Fin3

Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 260,210	$ 256,771
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	51,499,982	51,518,162
Common Stock, shares outstanding	30,726,789	26,875,585
Treasury stock, shares	20,617,110	24,479,020

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest and dividend income:
Interest and fees on loans	$ 47,533	$ 34,411	$ 92,813	$ 66,174
Interest and dividends on investment securities	6,810	6,489	13,336	13,102
Dividends on non-marketable securities	249	218	493	385
Interest on interest-bearing bank deposits	319	214	1,060	411
Total interest and dividend income	54,911	41,332	107,702	80,072
Interest expense:
Interest on deposits	4,865	3,904	9,499	7,691
Interest on borrowings	660	536	1,170	767
Total interest expense	5,525	4,440	10,669	8,458
Net interest income before provision for loan losses	49,386	36,892	97,033	71,614
Provision for loan losses	1,873	4,025	1,914	5,820
Net interest income after provision for loan losses	47,513	32,867	95,119	65,794
Non-interest income:
Service charges	4,371	3,546	8,881	6,872
Bank card fees	3,672	3,134	7,034	5,938
Mortgage banking income	8,911	594	16,882	1,048
Bank-owned life insurance income	446	472	898	942
Other non-interest income	1,711	4,124	2,862	5,538
OREO related income	451	86	841	314
Total non-interest income	19,562	11,956	37,398	20,652
Non-interest expense:
Salaries and benefits	29,123	19,909	59,795	40,299
Occupancy and equipment	7,190	5,242	15,145	10,679
Telecommunications and data processing	2,101	1,552	6,467	3,139
Marketing and business development	1,237	545	2,461	1,196
FDIC deposit insurance	757	686	1,510	1,391
Bank card expense	1,097	896	3,233	1,779
Professional fees	738	1,270	3,557	1,686
Other non-interest expense	3,106	2,733	6,951	5,139
Problem asset workout	775	880	1,556	1,752
(Gain) loss on OREO sales, net	(14)	(1,644)	64	(1,756)
Core deposit intangible asset amortization	653	1,370	1,306	2,740
Total non-interest expense	46,763	33,439	102,045	68,044
Income before income taxes	20,312	11,384	30,472	18,402
Income tax expense	2,800	2,175	4,495	935
Net income	$ 17,512	$ 9,209	$ 25,977	$ 17,467
Earnings per share-basic (in dollars per share)	$ 0.57	$ 0.34	$ 0.85	$ 0.65
Earnings per share-diluted (in dollars per share)	$ 0.56	$ 0.33	$ 0.83	$ 0.63
Weighted average number of common shares outstanding:
Basic (Shares)	30,735,427	26,955,187	30,615,226	26,878,904
Diluted (Shares)	31,387,175	27,597,443	31,275,359	27,637,532

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 17,512	$ 9,209	$ 25,977	$ 17,467
Securities available-for-sale:
Net unrealized gains (losses) arising during the period, net of tax	(2,191)	1,014	(8,971)	1,276
Less: amortization of net unrealized holding gains to income, net of tax	(327)	(353)	(714)	(710)
Other comprehensive (loss) income	(2,518)	661	(9,685)	566
Comprehensive income	$ 14,994	$ 9,870	$ 16,292	$ 18,033

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Tax (expense) benefit on net unrealized gains arising during the period	$ 688	$ (631)	$ 2,990	$ (792)
Tax (expense) benefit of amortization of net unrealized holding gains to income	$ 103	$ 217	$ 988	$ 173

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Adjustments for New Accounting Principle, Early Adoption [Member]Retained earnings [Member]	Adjustments for New Accounting Principle, Early Adoption [Member]Accumulated other comprehensive income (loss), net [Member]	Adjustments for New Accounting Principle, Early Adoption [Member]	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Treasury stock [Member]	Accumulated other comprehensive income (loss), net [Member]	Total
Balance in the beginning at Dec. 31, 2016				$ 514	$ 984,087	$ 55,454	$ (502,104)	$ (1,762)	$ 536,189
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						17,467			17,467
Stock-based compensation					1,869				1,869
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock of net				1	(12,878)		5,624		(7,253)
Cash dividends declared						(4,351)			(4,351)
Warrant exercise					(1,933)		1,933
Other comprehensive income (loss)								566	566
Balance in the ending at Jun. 30, 2017				515	971,145	68,570	(494,547)	(1,196)	544,487
Balance in the beginning at Dec. 31, 2017				515	970,668	60,795	(493,329)	(6,242)	532,407
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						25,977			25,977
Stock-based compensation					2,006				2,006
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock of net					(2,742)		9,078		6,336
Reissuance of treasury stock for acquisition peoples, Inc					42,243		67,970		110,213
Cash dividends declared						(7,095)			(7,095)
Reclassification of certain tax effects from accumulated other comprehensive income | Accounting Standards Update 2018-02 [Member]	$ 1,479	$ (1,479)
Cumulative effect adjustment | Accounting Standards Update 2017-12 [Member]	$ 26		$ 26
Other comprehensive income (loss)								(9,685)	(9,685)
Balance in the ending at Jun. 30, 2018				$ 515	$ 1,012,175	$ 81,182	$ (416,281)	$ (17,406)	$ 660,185

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Gain on reissuance of treasury stock	$ 7,272	$ 5,004
Reissuance of treasury stock, shares	3,398,477
Cash dividends declared per share	$ 0.23	$ 0.16

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 25,977	$ 17,467
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,914	5,820
Depreciation and amortization	6,039	6,630
Current income tax receivable	479	1,622
Deferred income taxes	3,098	(369)
Net excess tax benefit on stock-based compensation	(1,161)	(3,393)
Discount accretion, net of premium amortization on securities	753	1,324
Loan accretion	(12,401)	(12,728)
Gain on sale of mortgages, net	(14,849)	(1,048)
Origination of loans held for sale, net of repayments	(526,071)	(39,279)
Proceeds from sales of loans held for sale	489,191	53,719
Bank-owned life insurance income	(898)	(942)
Loss (gain) on the sale of other real estate owned, net	64	(1,756)
Impairment on other real estate owned	64	46
Gain on sale of fixed assets	(8)	40
Gain from banking center divestitures		(2,886)
Stock-based compensation	2,006	1,869
Change in other assets	(16,240)	1,947
Change in other liabilities	11,219	6,547
Net cash (used in) provided by operating activities	(30,824)	34,630
Cash flows from investing activities:
Purchase of FHLB stock	(9,421)	(7,204)
Proceeds from redemption of FHLB stock	9,160	3,685
Proceeds from maturities of investment securities held-to-maturity	32,158	36,216
Proceeds from maturities of investment securities available-for-sale	112,748	115,268
Proceeds from sales of investment securities available-for-sale	33,202
Proceeds from sales of non-marketable securities	67
Purchase of investment securities held-to-maturity	(40,735)
Purchase of investment securities available-for-sale	(42,199)	(96,948)
Net increase in loans	(130,019)	(243,118)
Purchases of premises and equipment, net	(3,462)	(581)
Proceeds from sales of loans	713	33,813
Proceeds from sales of other real estate owned	529	3,714
Net cash activity from acquisition	68,984
Net cash provided by (used in) investing activities	31,725	(155,155)
Cash flows from financing activities:
Net decrease in deposits	(78,006)	(8,308)
(Decrease) increase in repurchase agreements	(57,022)	27,202
Advances from FHLB	448,560	253,129
FHLB payoffs	(423,167)	(162,679)
Issuance of stock under purchase and equity compensation plans	(2,377)	(7,253)
Proceeds from exercise of stock options	8,713
Payment of dividends	(7,049)	(4,475)
Net cash (used in) provided by financing activities	(110,348)	97,616
Decrease in cash, cash equivalents and restricted cash	(109,447)	(22,909)
Cash, cash equivalents and restricted cash at beginning of the year	257,364	152,736
Cash, cash equivalents and restricted cash at end of period	147,917	129,827
Supplemental disclosure of cash flow information during the period:
Cash paid for interest	10,310	8,333
Net tax refunds	2,245	33
Supplemental schedule of non-cash investing activities:
Loans transferred to other real estate owned at fair value	24,382	639
(Decrease) increase in loans purchased but not settled	(10,037)	1,937
Loans transferred from loans held for sale to loans	2,440	$ 3,729
Treasury stock reissued for acquisition	$ 110,213

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
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 with the intent to acquire and operate financial services franchises and other complementary businesses in targeted markets. The Company is headquartered immediately south of Denver, in Greenwood Village, 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 located primarily in Colorado and the greater Kansas City region, and through online and mobile banking products and services. On January 1, 2018, the Company completed the acquisition of Peoples, Inc. refer to note 3 – Acquisition Activities for further details. The accompanying interim unaudited consolidated financial statements serve to update the National Bank Holdings Corporation Annual Report on Form 10-K for the year ended December 31, 2017 and include the accounts of the Company and its wholly owned subsidiary, NBH Bank. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and where applicable, with general practices in the banking industry or guidelines prescribed by bank regulatory agencies. However, they may not include all information and notes necessary to constitute a complete set of financial statements under GAAP applicable to annual periods and accordingly should be read in conjunction with the financial information contained in the Company's most recent Form 10-K. The unaudited consolidated financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair statement of the results presented. All such adjustments are of a normal recurring nature. All significant intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications of prior years' amounts are made whenever necessary to conform to current period presentation. The results of operations for the interim period is not necessarily indicative of the results that may be expected for the full year or any other interim period. All amounts are in thousands, except share and per share data, or as otherwise noted. 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. Beginning in the first quarter 2018, loans previously referred to as "non 310-30 loans" are referred to as "originated and acquired loans," which include originated loans as well as acquired loans not accounted for under ASC 310-30. No amounts were reclassified resulting from this change in terminology. 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 for the year ended December 31, 2017 and are contained in the Company's Annual Report on Form 10-K. There have not been any significant changes to the application of significant accounting policies since December 31, 2017, except for the following additions: Mortgage Servicing– Mortgage servicing rights (“MSRs”) associated with loans originated and sold, where servicing is retained, are initially capitalized at fair value and included in intangible assets, net on the consolidated statements of financial condition. For subsequent measurement purposes, the Company measures servicing assets based on the lower of cost or market using the amortization method. The values of these capitalized servicing rights are amortized as an offset to the loan servicing income earned in relation to the servicing revenue expected to be earned. The carrying values of these rights are reviewed quarterly for impairment based on the fair value of those assets. For purposes of impairment evaluation and measurement, management stratifies MSRs based on the predominant risk characteristics of the underlying loans, including loan type and loan term. If, by individual stratum, the carrying amount of these MSRs exceeds fair value, a valuation allowance is established and the impairment is recognized in mortgage banking income. If the fair value of impaired MSRs subsequently increases, management recognizes the increase in fair value in current period mortgage banking income and, through a reduction in the valuation allowance, adjusts the carrying value of the MSRs to a level not in excess of amortized cost. Reserve for Mortgage Loan Repurchase Losses– The Company sells mortgage loans to various third parties, including government-sponsored entities, under contractual provisions that include various representations and warranties that typically cover ownership of the loan, compliance with loan criteria set forth in the applicable agreement, validity of the lien securing the loan, absence of delinquent taxes or liens against the property securing the loan, and similar matters. The Company may be required to repurchase the mortgage loans with identified defects, indemnify the investor or insurer, or reimburse the investor for credit loss incurred on the loan (collectively “repurchase”) in the event of a material breach of such contractual representations or warranties. Risk associated with potential repurchases or other forms of settlement is managed through underwriting and quality assurance practices. The Company establishes mortgage repurchase reserves related to various representations and warranties that reflect management’s estimate of losses based on a combination of factors. Such factors incorporate actual and historic loss history, delinquency trends in the portfolio and economic conditions. The Company establishes a reserve at the time loans are sold and quarterly updates the reserve estimate during the estimated loan life. The repurchase reserve is included in other liabilities on the consolidated statements of financial condition.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2018
Text Block [Abstract]
Recent Accounting Pronouncements	Note 2 Recent Accounting Pronouncements Revenue from Contracts with Customers —In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers . This update supersedes revenue recognition requirements in ASC Topic 605, Revenue Recognition , including most industry-specific revenue recognition guidance in the FASB Accounting Standards Codification (“ASC”). The new guidance stipulates that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides specific steps that entities should apply in order to achieve this principle. The amendments are effective for interim and annual periods beginning after December 15, 2017, with early application permitted for interim and annual periods beginning after December 15, 2016. ASU 2014-09 allows for either full retrospective or modified retrospective adoption. The new guidance does not apply to revenue associated with financial assets and liabilities including loans, leases, securities, and derivatives that are accounted for under other GAAP. Accordingly, the majority of the Company’s revenues are not affected. The Company adopted ASU No. 2014-09 on January 1, 2018 utilizing the modified retrospective approach. Additionally, the Company has determined certain service charges, bank card fees and real estate sales are within the scope of the ASU, but has not identified changes to the timing or amount of revenue recognition. Accounting policies and procedures did not change materially as the principles of revenue recognition from the ASU are largely consistent with existing guidance and current practices applied by the Company. Refer to note 11 of our consolidated financial statements for required disclosures under the new standard. 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. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company expects to adopt ASU 2016-02 in the first quarter of 2019 and is currently in the process of evaluating the impact of the ASU's adoption on the Company's consolidated financial statements . 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. The amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption in fiscal years beginning after December 15, 2018 is permitted. The amendment requires the use of the modified retrospective approach for adoption. The Company is in the process of evaluating the impact of the ASU’s adoption on the Company’s consolidated financial statements. Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities —In August 2017, the FASB issued ASU 2017-12 , Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities. The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. ASU 2017-12 is effective for public business entities for annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted, including in an interim period. ASU 2017-12 requires a modified retrospective transition method in which the Company will recognize the cumulative effect of the change on the opening balance of each affected component of equity in the consolidated statements of financial condition as of the date of adoption. The Company adopted ASU 2017-12 during the first quarter of 2018 and recorded a cumulative effect adjustment of $26 thousand within equity in the consolidated statements of financial condition. Reclassification of Certain Tax Effects —In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This update allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The amendments eliminate the stranded tax effects that were created as a result of the reduction of historical U.S. federal corporate income tax rate to the newly enacted U.S. federal corporate income tax rate. The update is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted, and is to be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company early adopted ASU 2018-02 in the first quarter of 2018, resulting in a $1.5 million reclassification from accumulated other comprehensive loss to retained earnings on the consolidated statements of financial condition and the consolidated statements of changes in shareholders’ equity. Other Pronouncements —The company adopted ASU 2016-01, Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities (Topic 825), ASU 2016-18, Restricted Cash (a consensus of the FASB Emerging Issues Task Force, ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payment s and ASU 2017-05 Other Income – Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20) with no material impact on its financial statements. The Company reviewed ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment and ASU2018-07, Compensations – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting and does not expect the adoption of these pronouncements to have a material impact on its financial statements .

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Note 4 Investment Securities The Company’s investment securities portfolio is comprised of available-for-sale and held-to-maturity investment securities. These investment securities totaled $1.1 billion at June 30, 2018 and included $0.8 billion of available-for-sale securities and $0.3 billion of held-to-maturity securities. At December 31, 2017, investment securities totaled $1.1 billion and included $0.8 billion of available-for-sale securities and $0.3 billion of held-to-maturity securities. Available-for-sale At June 30, 2018 and December 31, 2017, the Company held $856.8 million and $855.3 million of available-for-sale investment securities, respectively. Available-for-sale securities are summarized as follows as of the dates indicated: June 30, 2018 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 $ 172,595 $ 1,429 $ (2,769) $ 171,255 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 710,097 116 (26,230) 683,983 Municipal securities 1,054 — (10) 1,044 Other securities 469 — — 469 Total investment securities available-for-sale $ 884,215 $ 1,545 $ (29,009) $ 856,751 December 31, 2017 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 $ 167,269 $ 2,371 $ (992) $ 168,648 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 702,107 351 (17,228) 685,230 Municipal securities 1,054 — (6) 1,048 Other securities 419 — — 419 Total investment securities available-for-sale $ 870,849 $ 2,722 $ (18,226) $ 855,345 At June 30, 2018 and December 31, 2017, 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: June 30, 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 $ 93,407 $ (1,923) $ 28,208 $ (846) $ 121,615 $ (2,769) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 297,510 (5,435) 361,595 (20,795) 659,105 (26,230) Municipal securities 510 (10) — — 510 (10) Total $ 391,427 $ (7,368) $ 389,803 $ (21,641) $ 781,230 $ (29,009) December 31, 2017 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 $ 62,178 $ (408) $ 36,086 $ (584) $ 98,264 $ (992) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 162,346 (830) 412,967 (16,398) 575,313 (17,228) Municipal securities 514 (6) — — 514 (6) Total $ 225,038 $ (1,244) $ 449,053 $ (16,982) $ 674,091 $ (18,226) The unrealized losses in the Company's investment portfolio at June 30, 2018 were caused by changes in interest rates. The portfolio included 213 securities, having an aggregate fair value of $781.2 million, which were in an unrealized loss position at June 30, 2018, compared to 87 securities, with an aggregate fair value of $674.1 million at December 31, 2017. Management evaluated all of the available for sale securities in an unrealized loss position at June 30, 2018 and December 31, 2017, and concluded no other-than-temporary impairment (“OTTI”) existed at June 30, 2018 or December 31, 2018. During the six months ended June 30, 2017, the Company identified one security with OTTI with an aggregate fair value of $0.3 million, and recorded $0.2 million of OTTI included in other non-interest expense on the consolidated statement of operations during the three and six months ended June 30, 2017. The unrealized losses on the remaining securities in an unrealized loss position were caused by changes in interest rates. 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 $313.6 million and $334.6 million at June 30, 2018 and at December 31, 2017, respectively. 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. The estimated weighted average life of the available-for-sale mortgage-backed securities portfolio was 3.4 years and 3.4 years at June 30, 2018 and December 31, 2017, respectively. This estimate is based on assumptions and actual results may differ. At June 30, 2018 and December 31, 2017, the duration of the total available-for-sale investment portfolio was 3.1 years and 3.1 years, respectively. As of June 30, 2018, municipal securities with an amortized cost and fair value of $0.2 million were due after one year through five years and municipal securities with an amortized cost and fair value of $0.5 million were due after five years through ten years. Other securities of $0.3 million as of June 30, 2018, have no stated contractual maturity date. Held-to-maturity At June 30, 2018 and December 31, 2017, the Company held $266.2 million and $258.7 million of held-to-maturity investment securities, respectively. Held-to-maturity investment securities are summarized as follows as of the dates indicated: June 30, 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 $ 178,946 $ 2 $ (3,477) $ 175,471 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 87,251 — (2,512) 84,739 Total investment securities held-to-maturity $ $ 2 $ (5,989) $ 260,210 December 31, 2017 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 $ 204,352 $ 151 $ (455) $ 204,048 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 54,378 — (1,655) 52,723 Total investment securities held-to-maturity $ 258,730 $ 151 $ (2,110) $ 256,771 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: June 30, 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 $ 158,592 $ (2,972) $ 15,245 $ (506) $ 173,837 $ (3,478) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 44,284 (414) 40,456 (2,097) 84,740 (2,511) Total $ 202,876 $ (3,386) $ 55,701 $ (2,603) $ 258,577 $ (5,989) December 31, 2017 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 $ 149,182 $ (220) $ 17,506 $ (235) $ 166,688 $ (455) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 6,460 (65) 46,264 (1,590) 52,724 (1,655) Total $ 155,642 $ (285) $ 63,770 $ (1,825) $ 219,412 $ (2,110) The held-to-maturity portfolio included 49 securities, having an aggregate fair value of $258.6 million, which were in an unrealized loss position at June 30, 2018, compared to 36 securities, with a fair value of $219.4 million, at December 31, 2017. The unrealized losses in the Company's investments at June 30, 2018 and December 31, 2017 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 June 30, 2018 or December 31, 2017. 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 $153.0 million and $142.0 million at June 30, 2018 and December 31, 2017, respectively. Actual maturities of mortgage-backed securities may differ from scheduled maturities depending on the repayment characteristics and experience of the underlying financial instruments. The estimated weighted average expected life of the held-to-maturity mortgage-backed securities portfolio as of June 30, 2018 and December 31, 2017 was 3.0 years and 3.1 years, respectively. This estimate is based on assumptions and actual results may differ. The duration of the total held-to-maturity investment portfolio was 2.8 years and 2.8 years as of June 30, 2018 and December 31, 2017, respectively.

Loans

Loans	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans	90 30-59 60-89 than 90 originated and days past days past days past days past Total past acquired due and Non- due due due due Current loans still accruing accrual Originated and acquired loans: Commercial: Commercial and industrial $ 1,765 $ 2,644 $ 2,305 $ 6,714 $ 1,673,659 $ 1,680,373 $ 40 $ 5,545 Owner occupied commercial real estate 1,465 471 2,287 4,223 378,428 382,651 460 6,479 Agriculture 194 217 718 1,129 193,667 194,796 — 2,108 Energy — — 796 796 36,425 37,221 — 796 Total commercial 3,424 3,332 6,106 12,862 2,282,179 2,295,041 500 14,928 Commercial real estate non-owner occupied: Construction 1,208 — 1,080 2,288 92,169 94,457 — 1,080 Acquisition/development — 17 — 17 23,574 23,591 — 824 Multifamily — — — — 63,483 63,483 — — Non-owner occupied 19 332 142 493 412,716 413,209 142 597 Total commercial real estate 1,227 349 1,222 2,798 591,942 594,740 142 2,501 Residential real estate: Senior lien 2,733 1,777 2,426 6,936 719,540 726,476 366 7,372 Junior lien 982 49 191 1,222 98,972 100,194 16 792 Total residential real estate 3,715 1,826 2,617 8,158 818,512 826,670 382 8,164 Consumer 278 94 98 470 25,680 26,150 80 42 Total originated and acquired loans $ 8,644 $ 5,601 $ 10,043 $ 24,288 $ 3,718,313 $ 3,742,601 $ 1,104 $ 25,635 December 31, 2017 Greater Total Loans > 90 30-59 60-89 than 90 originated and days past days past days past days past Total past acquired due and Non- due due due due Current loans still accruing accrual Originated and acquired loans: Commercial: Commercial and industrial $ 554 $ 117 $ 1,389 $ 2,060 $ 1,373,962 $ 1,376,022 $ 150 $ 7,767 Owner occupied commercial real estate 696 — 1,983 2,679 270,074 272,753 — 3,478 Agriculture 585 — 701 1,286 137,609 138,895 — 2,003 Energy — — 1,645 1,645 55,815 57,460 — 1,645 Total commercial 1,835 117 5,718 7,670 1,837,460 1,845,130 150 14,893 Commercial real estate non-owner occupied: Construction — — 179 179 107,502 107,681 — 179 Acquisition/development 1,097 — — 1,097 13,318 14,415 — — Multifamily — — — — 26,947 26,947 — — Non-owner occupied 56 — 574 630 335,468 336,098 — 605 Total commercial real estate 1,153 — 753 1,906 483,235 485,141 — 784 Residential real estate: Senior lien 1,167 885 1,396 3,448 643,034 646,482 — 4,724 Junior lien 233 91 41 365 56,631 56,996 — 459 Total residential real estate 1,400 976 1,437 3,813 699,665 703,478 — 5,183 Consumer 157 6 5 168 24,407 24,575 — 140 Total originated and acquired loans $ 4,545 $ 1,099 $ 7,913 $ 13,557 $ 3,044,767 $ 3,058,324 $ 150 $ 21,000 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 $25.6 million at June 30, 2018, increasing $4.6 million, or 22.1% from December 31, 2017, due to the Peoples acquisition. The Company’s internal risk rating system uses a series of grades that reflect its 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. Loans that are perceived to have acceptable risk are categorized as “Pass” loans. “Special mention” loans represent loans that have potential credit weaknesses that deserve close attention. Special mention loans include borrowers that have potential weaknesses or unwarranted risks that, unless corrected, may threaten the borrower's ability to meet debt service requirements. However, these borrowers are still believed to have the ability to respond to and resolve the financial issues that threaten their financial situation. Loans classified as “Substandard” have a well-defined credit weakness and are inadequately protected by the current paying capacity of the obligor or of the collateral pledged, if any. Although these loans are identified as potential problem loans, they may never become non-performing. Substandard loans have a distinct possibility of loss if the deficiencies are not corrected. “Doubtful” loans are loans that management believes the collection of payments in accordance with the terms of the loan agreement are highly questionable and improbable. Doubtful loans are deemed impaired and put on non-accrual status. Credit exposure for all loans as determined by the Company’s internal risk rating system was as follows as of June 30, 2018 and December 31, 2017, respectively: June 30, 2018 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,649,254 $ 12,988 $ 17,232 $ 899 $ 1,680,373 Owner occupied commercial real estate 346,325 26,910 9,341 75 382,651 Agriculture 189,923 2,765 1,890 218 194,796 Energy 36,425 — 796 — 37,221 Total commercial 2,221,927 42,663 29,259 1,192 2,295,041 Commercial real estate non-owner occupied: Construction 93,377 — 1,080 — 94,457 Acquisition/development 22,767 — 824 — 23,591 Multifamily 63,483 — — — 63,483 Non-owner occupied 395,921 15,641 1,647 — 413,209 Total commercial real estate 575,548 15,641 3,551 — 594,740 Residential real estate: Senior lien 713,175 5,338 7,963 — 726,476 Junior lien 98,623 504 1,067 — 100,194 Total residential real estate 811,798 5,842 9,030 — 826,670 Consumer 26,107 1 42 — 26,150 Total originated and acquired loans $ 3,635,380 $ 64,147 $ 41,882 $ 1,192 $ 3,742,601 Loans accounted for under ASC 310-30: Commercial $ 18,610 $ 1,051 $ 3,417 $ — $ 23,078 Commercial real estate non-owner occupied 46,291 950 1,165 — 48,406 Residential real estate 8,860 947 1,558 — 11,365 Consumer — — 105 — 105 Total loans accounted for under ASC 310-30 $ 73,761 $ 2,948 $ 6,245 $ — $ 82,954 Total loans $ 3,709,141 $ 67,095 $ 48,127 $ 1,192 $ 3,825,555 December 31, 2017 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,349,116 $ 10,829 $ 14,824 $ 1,253 $ 1,376,022 Owner occupied commercial real estate 250,224 17,030 5,424 75 272,753 Agriculture 118,068 18,824 1,870 133 138,895 Energy 55,814 — 1,646 — 57,460 Total commercial 1,773,222 46,683 23,764 1,461 1,845,130 Commercial real estate non-owner occupied: Construction 107,502 — 179 — 107,681 Acquisition/development 14,415 — — — 14,415 Multifamily 24,817 — 2,130 — 26,947 Non-owner occupied 333,225 1,396 1,477 — 336,098 Total commercial real estate 479,959 1,396 3,786 — 485,141 Residential real estate: Senior lien 641,294 91 5,097 — 646,482 Junior lien 56,172 — 824 — 56,996 Total residential real estate 697,466 91 5,921 — 703,478 Consumer 24,432 1 142 — 24,575 Total originated and acquired loans $ 2,975,079 $ 48,171 $ 33,613 $ 1,461 $ 3,058,324 Loans accounted for under ASC 310-30: Commercial $ 23,954 $ 1,070 $ 4,451 $ — $ 29,475 Commercial real estate non-owner occupied 50,537 883 26,488 — 77,908 Residential real estate 10,072 1,055 1,632 — 12,759 Consumer 327 9 145 — 481 Total loans accounted for under ASC 310-30 $ 84,890 $ 3,017 $ 32,716 $ — $ 120,623 Total loans $ 3,059,969 $ 51,188 $ 66,329 $ 1,461 $ 3,178,947 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 June 30, 2018, the Company measured $15.5 million of impaired loans based on the fair value of the collateral less selling costs and $2.1 million of impaired loans using discounted cash flows and the loan’s initial contractual effective interest rate. Impaired loans totaling $8.8 million, which individually were less than $250 thousand each, were measured through the general ALL reserves due to their relatively small size. Impaired loans acquired from Peoples totaling $8.4 million were marked to fair value at the date of acquisition. At June 30, 2018 and December 31, 2017, the Company’s recorded investment in impaired loans were $34.8 million and $30.9 million, respectively, of which $6.9 million and $8.5 million, respectively, were accruing TDRs. Impaired loans at June 30, 2018 were primarily comprised of eight relationships totaling $14.3 million. Three of the relationships were in the commercial and industrial sector totaling $6.1 million, two of the relationships were in the owner-occupied commercial real estate sector totaling $4.8 million, one of the relationships was in the agricultural sector totaling $1.3 million, one of the relationships was in the energy sector totaling $1.1 million and one of the relationships was in the construction sector totaling $1.0 million. Impaired loans had a collective related allowance for loan losses allocated to them of $1.2 million and $1.5 million at June 30, 2018 and December 31, 2017, respectively. Additional information regarding impaired loans at June 30, 2018 and December 31, 2017 is set forth in the table below: June 30, 2018 December 31, 2017 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 $ 5,719 $ 4,209 $ — $ 6,481 $ 5,055 $ — Owner occupied commercial real estate 7,063 6,698 — 4,186 3,934 — Agriculture 1,508 1,259 — 1,502 1,245 — Energy 6,642 1,923 — 8,661 3,861 — Total commercial 20,932 14,089 — 20,830 14,095 — Commercial real estate non-owner occupied: Construction 1,307 1,082 — 215 179 — Acquisition/development 1,065 824 — — — — Multifamily — — — 29 29 — Non-owner occupied 648 569 — 901 853 — Total commercial real estate 3,020 2,475 — 1,145 1,061 — Residential real estate: Senior lien 3,075 2,781 — 333 309 — Junior lien 414 353 — — — — Total residential real estate 3,489 3,134 — 333 309 — Consumer 47 43 — — — — Total impaired loans with no related allowance recorded $ 27,488 $ 19,741 $ — $ 22,308 $ 15,465 $ — With a related allowance recorded: Commercial: Commercial and industrial $ 7,147 $ 4,539 $ 907 $ 7,919 $ 5,339 $ 1,329 Owner occupied commercial real estate 1,400 1,222 80 873 713 4 Agriculture 2,229 2,186 218 2,122 2,083 133 Energy — — — — — — Total commercial 10,776 7,947 1,205 10,914 8,135 1,466 Commercial real estate non-owner occupied: Construction — — — — — — Acquisition/development — — — — — — Multifamily — — — — — — Non-owner occupied 347 293 2 207 200 1 Total commercial real estate 347 293 2 207 200 1 Residential real estate: Senior lien 6,509 5,672 25 6,481 5,753 24 Junior lien 1,308 1,169 7 1,295 1,179 8 Total residential real estate 7,817 6,841 32 7,776 6,932 32 Consumer — — — 146 141 1 Total impaired loans with a related allowance recorded $ 18,940 $ 15,081 $ 1,239 $ 19,043 $ 15,408 $ 1,500 Total impaired loans $ 46,428 $ 34,822 $ 1,239 $ 41,351 $ 30,873 $ 1,500 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 June 30, 2018 June 30, 2017 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 5,321 $ 90 $ 6,645 $ 25 Owner occupied commercial real estate 6,723 17 3,789 23 Agriculture 1,259 — 1,454 — Energy 1,843 17 5,680 — Total commercial 15,147 124 17,568 48 Commercial real estate non-owner occupied: Construction 1,081 — — — Acquisition/development 827 — — — Multifamily — — — — Non-owner occupied 574 — 312 5 Total commercial real estate 2,481 — 312 5 Residential real estate: Senior lien 2,818 — 330 — Junior lien 354 — — — Total residential real estate 3,172 — 330 — Consumer 14 — — — Total impaired loans with no related allowance recorded $ 20,815 $ 124 $ 18,210 $ 53 With a related allowance recorded: Commercial: Commercial and industrial $ 4,607 $ — $ 4,643 $ — Owner occupied commercial real estate 1,233 4 2,340 7 Agriculture 2,142 1 912 1 Energy — — 6,624 — Total commercial 7,982 5 14,519 8 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily 9 — 31 — Non-owner occupied 297 5 216 2 Total commercial real estate 306 5 247 2 Residential real estate: Senior lien 5,744 13 6,525 20 Junior lien 1,187 11 1,403 12 Total residential real estate 6,931 23 7,928 32 Consumer 31 — 169 — Total impaired loans with a related allowance recorded $ 15,250 $ 33 $ 22,863 $ 42 Total impaired loans $ 36,065 $ 158 $ 41,073 $ 95 For the six months ended June 30, 2018 June 30, 2017 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 5,565 $ 173 $ 7,030 $ 73 Owner occupied commercial real estate 6,793 35 3,834 41 Agriculture 1,259 6 1,531 — Energy 2,098 37 5,889 — Total Commercial 15,715 251 18,284 114 Commercial real estate non-owner occupied: Construction 1,081 — — — Acquisition/development 856 — — — Multifamily — — — — Non-owner occupied 591 — 320 12 Total commercial real estate 2,528 — 320 12 Residential real estate: Senior lien 2,846 — 334 — Junior lien 358 — — — Total residential real estate 3,204 — 334 — Consumer 14 — — — Total impaired loans with no related allowance recorded $ 21,461 $ 251 $ 18,938 $ 126 With a related allowance recorded: Commercial: Commercial and industrial $ 4,639 $ — $ 4,630 $ — Owner occupied commercial real estate 1,249 9 2,349 11 Agriculture 2,084 2 914 3 Energy — — 6,602 — Total Commercial 7,972 11 14,495 14 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily 19 — 31 1 Non-owner occupied 308 9 220 5 Total commercial real estate 327 9 251 6 Residential real estate: Senior lien 5,821 26 6,583 40 Junior lien 1,202 20 1,421 25 Total residential real estate 7,023 46 8,004 65 Consumer 32 — 175 — Total impaired loans with a related allowance recorded $ 15,354 $ 66 $ 22,925 $ 85 Total impaired loans $ 36,815 $ 317 $ 41,863 $ 211 Interest income recognized on impaired loans noted in the table above primarily represents interest earned on accruing TDRs. Interest income recognized on impaired loans during the three months ended June 30, 2018 and 2017 was $0.2 million and $0.1 million, respectively. Interest income recognized on impaired loans during the six months ended June 30, 2018 and 2017 was $0.3 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 six months ended June 30, 2018, the Company restructured four loans with a recorded investment of $0.9 million at June 30, 2018 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 June 30, 2018 and December 31, 2017: June 30, 2018 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 5,509 $ 6,754 $ 6,299 $ 3,828 Commercial real estate non-owner occupied 266 278 311 — Residential real estate 1,165 1,190 1,172 12 Consumer — — — — Total $ 6,940 $ 8,222 $ 7,782 $ 3,840 December 31, 2017 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 6,595 $ 7,308 $ 7,171 $ 2,041 Commercial real estate non-owner occupied 455 489 500 — Residential real estate 1,409 1,461 1,420 2 Consumer 1 3 1 — Total $ 8,460 $ 9,261 $ 9,092 $ 2,043 The following table summarizes the Company’s carrying value of non-accrual TDRs as of June 30, 2018 and December 31, 2017: June 30, 2018 December 31, 2017 Commercial $ 2,698 $ 5,808 Commercial real estate non-owner occupied — — Residential real estate 1,264 1,336 Consumer — 111 Total non-accruing TDRs $ 3,962 $ 7,255 At June 30, 2018 and December 31, 2017, the Company had $6.9 million and $8.5 million, respectively, of accruing TDRs that had been restructured from the original terms in order to facilitate repayment. Accrual of interest is resumed on loans that were previously on non-accrual only after the loan has performed sufficiently. The Company had one TDR that was modified within the past twelve months and had defaulted on its restructured terms during the six months ended June 30, 2018. The defaulted TDR consisted of one commercial real estate non-owner occupied loan totaling $0.2 million. For purposes of this disclosure, the Company considers “default” to mean 90 days or more past due on principal or interest. Non-accruing TDRs decreased $3.3 million from December 31, 2017 due to charge-offs within the commercial loan segment. 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. During the three and six months ended June 30, 2017, the Company had three and five TDRs that had been modified within the past 12 months that defaulted on their restructured terms, respectively. Loans accounted for under ASC 310-30 Loan pools accounted for under ASC Topic 310-30 are periodically re-measured 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 re-measurement of loans accounted for under ASC 310-30 resulted in the following changes in the carrying amount of accretable yield during the six months ended June 30, 2018 and 2017: June 30, 2018 June 30, 2017 Accretable yield beginning balance $ 46,568 $ 60,476 Reclassification from non-accretable difference 8,053 7,732 Reclassification to non-accretable difference (1,695) (494) Accretion (10,224) (12,051) Accretable yield ending balance $ 42,702 $ 55,663 Below is the composition of the net book value for loans accounted for under ASC 310-30 at June 30, 2018 and December 31, 2017: June 30, 2018 December 31, 2017 Contractual cash flows $ 442,000 $ 489,892 Non-accretable difference (316,344) (322,701) Accretable yield (42,702) (46,568) Loans accounted for under ASC 310-30 $ 82,954 $ 120,623" id="sjs-B4">Note 5 Loans The loan portfolio is comprised of loans originated by the Company and loans that were acquired in connection with the Company’s acquisitions. Beginning in the first quarter 2018, loans previously referred to as "non 310-30 loans" are referred to as "originated and acquired loans," which include originated loans as well as acquired loans not accounted for under ASC 310-30. No amounts were reclassified resulting from this change in terminology. The tables below show the loan portfolio composition including carrying value by segment of originated and acquired loans and loans accounted for under ASC Topic 310-30, Receivables—Loans and Debt Securities Acquired with Deteriorated Credit Quality , as of the dates shows. The carrying value of originated and acquired loans is net of discounts, fees, costs and fair value marks of $9.8 million and $4.3 million as of June 30, 2018 and December 31, 2017, respectively. June 30, 2018 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 2,295,041 $ 23,078 $ 2,318,119 Commercial real estate non-owner occupied 594,740 48,411 643,151 Residential real estate 826,670 11,365 838,035 Consumer 26,150 100 26,250 Total $ 3,742,601 $ 82,954 $ 3,825,555 December 31, 2017 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 1,845,130 $ 29,475 $ 1,874,605 Commercial real estate non-owner occupied 485,141 77,908 563,049 Residential real estate 703,478 12,759 716,237 Consumer 24,575 481 25,056 Total $ 3,058,324 $ 120,623 $ 3,178,947 Delinquency for originated and acquired loans is shown in the following tables at June 30, 2018 and December 31, 2017: June 30, 2018 Greater Total Loans > 90 30-59 60-89 than 90 originated and days past days past days past days past Total past acquired due and Non- due due due due Current loans still accruing accrual Originated and acquired loans: Commercial: Commercial and industrial $ 1,765 $ 2,644 $ 2,305 $ 6,714 $ 1,673,659 $ 1,680,373 $ 40 $ 5,545 Owner occupied commercial real estate 1,465 471 2,287 4,223 378,428 382,651 460 6,479 Agriculture 194 217 718 1,129 193,667 194,796 — 2,108 Energy — — 796 796 36,425 37,221 — 796 Total commercial 3,424 3,332 6,106 12,862 2,282,179 2,295,041 500 14,928 Commercial real estate non-owner occupied: Construction 1,208 — 1,080 2,288 92,169 94,457 — 1,080 Acquisition/development — 17 — 17 23,574 23,591 — 824 Multifamily — — — — 63,483 63,483 — — Non-owner occupied 19 332 142 493 412,716 413,209 142 597 Total commercial real estate 1,227 349 1,222 2,798 591,942 594,740 142 2,501 Residential real estate: Senior lien 2,733 1,777 2,426 6,936 719,540 726,476 366 7,372 Junior lien 982 49 191 1,222 98,972 100,194 16 792 Total residential real estate 3,715 1,826 2,617 8,158 818,512 826,670 382 8,164 Consumer 278 94 98 470 25,680 26,150 80 42 Total originated and acquired loans $ 8,644 $ 5,601 $ 10,043 $ 24,288 $ 3,718,313 $ 3,742,601 $ 1,104 $ 25,635 December 31, 2017 Greater Total Loans > 90 30-59 60-89 than 90 originated and days past days past days past days past Total past acquired due and Non- due due due due Current loans still accruing accrual Originated and acquired loans: Commercial: Commercial and industrial $ 554 $ 117 $ 1,389 $ 2,060 $ 1,373,962 $ 1,376,022 $ 150 $ 7,767 Owner occupied commercial real estate 696 — 1,983 2,679 270,074 272,753 — 3,478 Agriculture 585 — 701 1,286 137,609 138,895 — 2,003 Energy — — 1,645 1,645 55,815 57,460 — 1,645 Total commercial 1,835 117 5,718 7,670 1,837,460 1,845,130 150 14,893 Commercial real estate non-owner occupied: Construction — — 179 179 107,502 107,681 — 179 Acquisition/development 1,097 — — 1,097 13,318 14,415 — — Multifamily — — — — 26,947 26,947 — — Non-owner occupied 56 — 574 630 335,468 336,098 — 605 Total commercial real estate 1,153 — 753 1,906 483,235 485,141 — 784 Residential real estate: Senior lien 1,167 885 1,396 3,448 643,034 646,482 — 4,724 Junior lien 233 91 41 365 56,631 56,996 — 459 Total residential real estate 1,400 976 1,437 3,813 699,665 703,478 — 5,183 Consumer 157 6 5 168 24,407 24,575 — 140 Total originated and acquired loans $ 4,545 $ 1,099 $ 7,913 $ 13,557 $ 3,044,767 $ 3,058,324 $ 150 $ 21,000 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 $25.6 million at June 30, 2018, increasing $4.6 million, or 22.1% from December 31, 2017, due to the Peoples acquisition. The Company’s internal risk rating system uses a series of grades that reflect its 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. Loans that are perceived to have acceptable risk are categorized as “Pass” loans. “Special mention” loans represent loans that have potential credit weaknesses that deserve close attention. Special mention loans include borrowers that have potential weaknesses or unwarranted risks that, unless corrected, may threaten the borrower's ability to meet debt service requirements. However, these borrowers are still believed to have the ability to respond to and resolve the financial issues that threaten their financial situation. Loans classified as “Substandard” have a well-defined credit weakness and are inadequately protected by the current paying capacity of the obligor or of the collateral pledged, if any. Although these loans are identified as potential problem loans, they may never become non-performing. Substandard loans have a distinct possibility of loss if the deficiencies are not corrected. “Doubtful” loans are loans that management believes the collection of payments in accordance with the terms of the loan agreement are highly questionable and improbable. Doubtful loans are deemed impaired and put on non-accrual status. Credit exposure for all loans as determined by the Company’s internal risk rating system was as follows as of June 30, 2018 and December 31, 2017, respectively: June 30, 2018 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,649,254 $ 12,988 $ 17,232 $ 899 $ 1,680,373 Owner occupied commercial real estate 346,325 26,910 9,341 75 382,651 Agriculture 189,923 2,765 1,890 218 194,796 Energy 36,425 — 796 — 37,221 Total commercial 2,221,927 42,663 29,259 1,192 2,295,041 Commercial real estate non-owner occupied: Construction 93,377 — 1,080 — 94,457 Acquisition/development 22,767 — 824 — 23,591 Multifamily 63,483 — — — 63,483 Non-owner occupied 395,921 15,641 1,647 — 413,209 Total commercial real estate 575,548 15,641 3,551 — 594,740 Residential real estate: Senior lien 713,175 5,338 7,963 — 726,476 Junior lien 98,623 504 1,067 — 100,194 Total residential real estate 811,798 5,842 9,030 — 826,670 Consumer 26,107 1 42 — 26,150 Total originated and acquired loans $ 3,635,380 $ 64,147 $ 41,882 $ 1,192 $ 3,742,601 Loans accounted for under ASC 310-30: Commercial $ 18,610 $ 1,051 $ 3,417 $ — $ 23,078 Commercial real estate non-owner occupied 46,291 950 1,165 — 48,406 Residential real estate 8,860 947 1,558 — 11,365 Consumer — — 105 — 105 Total loans accounted for under ASC 310-30 $ 73,761 $ 2,948 $ 6,245 $ — $ 82,954 Total loans $ 3,709,141 $ 67,095 $ 48,127 $ 1,192 $ 3,825,555 December 31, 2017 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,349,116 $ 10,829 $ 14,824 $ 1,253 $ 1,376,022 Owner occupied commercial real estate 250,224 17,030 5,424 75 272,753 Agriculture 118,068 18,824 1,870 133 138,895 Energy 55,814 — 1,646 — 57,460 Total commercial 1,773,222 46,683 23,764 1,461 1,845,130 Commercial real estate non-owner occupied: Construction 107,502 — 179 — 107,681 Acquisition/development 14,415 — — — 14,415 Multifamily 24,817 — 2,130 — 26,947 Non-owner occupied 333,225 1,396 1,477 — 336,098 Total commercial real estate 479,959 1,396 3,786 — 485,141 Residential real estate: Senior lien 641,294 91 5,097 — 646,482 Junior lien 56,172 — 824 — 56,996 Total residential real estate 697,466 91 5,921 — 703,478 Consumer 24,432 1 142 — 24,575 Total originated and acquired loans $ 2,975,079 $ 48,171 $ 33,613 $ 1,461 $ 3,058,324 Loans accounted for under ASC 310-30: Commercial $ 23,954 $ 1,070 $ 4,451 $ — $ 29,475 Commercial real estate non-owner occupied 50,537 883 26,488 — 77,908 Residential real estate 10,072 1,055 1,632 — 12,759 Consumer 327 9 145 — 481 Total loans accounted for under ASC 310-30 $ 84,890 $ 3,017 $ 32,716 $ — $ 120,623 Total loans $ 3,059,969 $ 51,188 $ 66,329 $ 1,461 $ 3,178,947 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 June 30, 2018, the Company measured $15.5 million of impaired loans based on the fair value of the collateral less selling costs and $2.1 million of impaired loans using discounted cash flows and the loan’s initial contractual effective interest rate. Impaired loans totaling $8.8 million, which individually were less than $250 thousand each, were measured through the general ALL reserves due to their relatively small size. Impaired loans acquired from Peoples totaling $8.4 million were marked to fair value at the date of acquisition. At June 30, 2018 and December 31, 2017, the Company’s recorded investment in impaired loans were $34.8 million and $30.9 million, respectively, of which $6.9 million and $8.5 million, respectively, were accruing TDRs. Impaired loans at June 30, 2018 were primarily comprised of eight relationships totaling $14.3 million. Three of the relationships were in the commercial and industrial sector totaling $6.1 million, two of the relationships were in the owner-occupied commercial real estate sector totaling $4.8 million, one of the relationships was in the agricultural sector totaling $1.3 million, one of the relationships was in the energy sector totaling $1.1 million and one of the relationships was in the construction sector totaling $1.0 million. Impaired loans had a collective related allowance for loan losses allocated to them of $1.2 million and $1.5 million at June 30, 2018 and December 31, 2017, respectively. Additional information regarding impaired loans at June 30, 2018 and December 31, 2017 is set forth in the table below: June 30, 2018 December 31, 2017 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 $ 5,719 $ 4,209 $ — $ 6,481 $ 5,055 $ — Owner occupied commercial real estate 7,063 6,698 — 4,186 3,934 — Agriculture 1,508 1,259 — 1,502 1,245 — Energy 6,642 1,923 — 8,661 3,861 — Total commercial 20,932 14,089 — 20,830 14,095 — Commercial real estate non-owner occupied: Construction 1,307 1,082 — 215 179 — Acquisition/development 1,065 824 — — — — Multifamily — — — 29 29 — Non-owner occupied 648 569 — 901 853 — Total commercial real estate 3,020 2,475 — 1,145 1,061 — Residential real estate: Senior lien 3,075 2,781 — 333 309 — Junior lien 414 353 — — — — Total residential real estate 3,489 3,134 — 333 309 — Consumer 47 43 — — — — Total impaired loans with no related allowance recorded $ 27,488 $ 19,741 $ — $ 22,308 $ 15,465 $ — With a related allowance recorded: Commercial: Commercial and industrial $ 7,147 $ 4,539 $ 907 $ 7,919 $ 5,339 $ 1,329 Owner occupied commercial real estate 1,400 1,222 80 873 713 4 Agriculture 2,229 2,186 218 2,122 2,083 133 Energy — — — — — — Total commercial 10,776 7,947 1,205 10,914 8,135 1,466 Commercial real estate non-owner occupied: Construction — — — — — — Acquisition/development — — — — — — Multifamily — — — — — — Non-owner occupied 347 293 2 207 200 1 Total commercial real estate 347 293 2 207 200 1 Residential real estate: Senior lien 6,509 5,672 25 6,481 5,753 24 Junior lien 1,308 1,169 7 1,295 1,179 8 Total residential real estate 7,817 6,841 32 7,776 6,932 32 Consumer — — — 146 141 1 Total impaired loans with a related allowance recorded $ 18,940 $ 15,081 $ 1,239 $ 19,043 $ 15,408 $ 1,500 Total impaired loans $ 46,428 $ 34,822 $ 1,239 $ 41,351 $ 30,873 $ 1,500 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 June 30, 2018 June 30, 2017 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 5,321 $ 90 $ 6,645 $ 25 Owner occupied commercial real estate 6,723 17 3,789 23 Agriculture 1,259 — 1,454 — Energy 1,843 17 5,680 — Total commercial 15,147 124 17,568 48 Commercial real estate non-owner occupied: Construction 1,081 — — — Acquisition/development 827 — — — Multifamily — — — — Non-owner occupied 574 — 312 5 Total commercial real estate 2,481 — 312 5 Residential real estate: Senior lien 2,818 — 330 — Junior lien 354 — — — Total residential real estate 3,172 — 330 — Consumer 14 — — — Total impaired loans with no related allowance recorded $ 20,815 $ 124 $ 18,210 $ 53 With a related allowance recorded: Commercial: Commercial and industrial $ 4,607 $ — $ 4,643 $ — Owner occupied commercial real estate 1,233 4 2,340 7 Agriculture 2,142 1 912 1 Energy — — 6,624 — Total commercial 7,982 5 14,519 8 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily 9 — 31 — Non-owner occupied 297 5 216 2 Total commercial real estate 306 5 247 2 Residential real estate: Senior lien 5,744 13 6,525 20 Junior lien 1,187 11 1,403 12 Total residential real estate 6,931 23 7,928 32 Consumer 31 — 169 — Total impaired loans with a related allowance recorded $ 15,250 $ 33 $ 22,863 $ 42 Total impaired loans $ 36,065 $ 158 $ 41,073 $ 95 For the six months ended June 30, 2018 June 30, 2017 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 5,565 $ 173 $ 7,030 $ 73 Owner occupied commercial real estate 6,793 35 3,834 41 Agriculture 1,259 6 1,531 — Energy 2,098 37 5,889 — Total Commercial 15,715 251 18,284 114 Commercial real estate non-owner occupied: Construction 1,081 — — — Acquisition/development 856 — — — Multifamily — — — — Non-owner occupied 591 — 320 12 Total commercial real estate 2,528 — 320 12 Residential real estate: Senior lien 2,846 — 334 — Junior lien 358 — — — Total residential real estate 3,204 — 334 — Consumer 14 — — — Total impaired loans with no related allowance recorded $ 21,461 $ 251 $ 18,938 $ 126 With a related allowance recorded: Commercial: Commercial and industrial $ 4,639 $ — $ 4,630 $ — Owner occupied commercial real estate 1,249 9 2,349 11 Agriculture 2,084 2 914 3 Energy — — 6,602 — Total Commercial 7,972 11 14,495 14 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily 19 — 31 1 Non-owner occupied 308 9 220 5 Total commercial real estate 327 9 251 6 Residential real estate: Senior lien 5,821 26 6,583 40 Junior lien 1,202 20 1,421 25 Total residential real estate 7,023 46 8,004 65 Consumer 32 — 175 — Total impaired loans with a related allowance recorded $ 15,354 $ 66 $ 22,925 $ 85 Total impaired loans $ 36,815 $ 317 $ 41,863 $ 211 Interest income recognized on impaired loans noted in the table above primarily represents interest earned on accruing TDRs. Interest income recognized on impaired loans during the three months ended June 30, 2018 and 2017 was $0.2 million and $0.1 million, respectively. Interest income recognized on impaired loans during the six months ended June 30, 2018 and 2017 was $0.3 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 six months ended June 30, 2018, the Company restructured four loans with a recorded investment of $0.9 million at June 30, 2018 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 June 30, 2018 and December 31, 2017: June 30, 2018 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 5,509 $ 6,754 $ 6,299 $ 3,828 Commercial real estate non-owner occupied 266 278 311 — Residential real estate 1,165 1,190 1,172 12 Consumer — — — — Total $ 6,940 $ 8,222 $ 7,782 $ 3,840 December 31, 2017 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 6,595 $ 7,308 $ 7,171 $ 2,041 Commercial real estate non-owner occupied 455 489 500 — Residential real estate 1,409 1,461 1,420 2 Consumer 1 3 1 — Total $ 8,460 $ 9,261 $ 9,092 $ 2,043 The following table summarizes the Company’s carrying value of non-accrual TDRs as of June 30, 2018 and December 31, 2017: June 30, 2018 December 31, 2017 Commercial $ 2,698 $ 5,808 Commercial real estate non-owner occupied — — Residential real estate 1,264 1,336 Consumer — 111 Total non-accruing TDRs $ 3,962 $ 7,255 At June 30, 2018 and December 31, 2017, the Company had $6.9 million and $8.5 million, respectively, of accruing TDRs that had been restructured from the original terms in order to facilitate repayment. Accrual of interest is resumed on loans that were previously on non-accrual only after the loan has performed sufficiently. The Company had one TDR that was modified within the past twelve months and had defaulted on its restructured terms during the six months ended June 30, 2018. The defaulted TDR consisted of one commercial real estate non-owner occupied loan totaling $0.2 million. For purposes of this disclosure, the Company considers “default” to mean 90 days or more past due on principal or interest. Non-accruing TDRs decreased $3.3 million from December 31, 2017 due to charge-offs within the commercial loan segment. 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. During the three and six months ended June 30, 2017, the Company had three and five TDRs that had been modified within the past 12 months that defaulted on their restructured terms, respectively. Loans accounted for under ASC 310-30 Loan pools accounted for under ASC Topic 310-30 are periodically re-measured 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 re-measurement of loans accounted for under ASC 310-30 resulted in the following changes in the carrying amount of accretable yield during the six months ended June 30, 2018 and 2017: June 30, 2018 June 30, 2017 Accretable yield beginning balance $ 46,568 $ 60,476 Reclassification from non-accretable difference 8,053 7,732 Reclassification to non-accretable difference (1,695) (494) Accretion (10,224) (12,051) Accretable yield ending balance $ 42,702 $ 55,663 Below is the composition of the net book value for loans accounted for under ASC 310-30 at June 30, 2018 and December 31, 2017: June 30, 2018 December 31, 2017 Contractual cash flows $ 442,000 $ 489,892 Non-accretable difference (316,344) (322,701) Accretable yield (42,702) (46,568) Loans accounted for under ASC 310-30 $ 82,954 $ 120,623

Allowance for Loan Losses

Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Allowance for Loan Losses	Note 6 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 and six months ended June 30, 2018 and 2017: Three months ended June 30, 2018 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 21,578 $ 4,890 $ 3,928 $ 290 $ 30,686 Originated and acquired beginning balance 21,485 4,871 3,928 290 30,574 Charge-offs — (11) (90) (234) (335) Recoveries 13 — 4 50 67 Provision 1,902 (318) (61) 200 1,723 Originated and acquired ending balance 23,400 4,542 3,781 306 32,029 ASC 310-30 beginning balance 93 19 — — 112 Charge-offs (61) — — — (61) Recoveries — — — — — Provision 150 — — — 150 ASC 310-30 ending balance 182 19 — — 201 Ending balance $ 23,582 $ 4,561 $ 3,781 $ 306 $ 32,230 Three months ended June 30, 2017 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 20,539 $ 5,815 $ 4,216 $ 280 $ 30,850 Originated and acquired beginning balance 20,539 5,599 4,216 276 30,630 Charge-offs — — (2) (119) (121) Recoveries 30 10 110 55 205 Provision 4,087 191 (257) 82 4,103 Originated and acquired ending balance 24,656 5,800 4,067 294 34,817 ASC 310-30 beginning balance — 216 — 4 220 Charge-offs — — — — — Recoveries — — — — — (Recoupment) provision — (82) — 4 (78) ASC 310-30 ending balance — 134 — 8 142 Ending balance $ 24,656 $ 5,934 $ 4,067 $ 302 $ 34,959 Six months ended June 30, 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) (11) (90) (513) (1,051) Recoveries 55 — 6 103 164 Provision 2,442 (1,030) (100) 411 1,723 Originated and acquired ending balance 23,400 4,542 3,781 306 32,029 ASC 310-30 beginning balance 45 26 — — 71 Charge-offs (61) — — — (61) Recoveries — — — — — Provision (recoupment) 198 (7) — — 191 ASC 310-30 ending balance 182 19 — — 201 Ending balance $ 23,582 $ 4,561 $ 3,781 $ 306 $ 32,230 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 1,204 $ 2 $ 32 $ 1 $ 1,239 Originated and acquired loans collectively evaluated for impairment 22,196 4,540 3,749 305 30,790 ASC 310-30 loans 182 19 — — 201 Total ending allowance balance $ 23,582 $ 4,561 $ 3,781 $ 306 $ 32,230 Loans: Originated and acquired loans individually evaluated for impairment $ 22,038 $ 2,767 $ 9,974 $ 43 $ 34,822 Originated and acquired loans collectively evaluated for impairment 2,273,002 591,974 816,696 26,107 3,707,779 ASC 310-30 loans 23,078 48,411 11,365 100 82,954 Total loans $ 2,318,118 $ 643,152 $ 838,035 $ 26,250 $ 3,825,555 Six months ended June 30, 2017 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 18,821 $ 5,642 $ 4,387 $ 324 $ 29,174 Originated and acquired beginning balance 18,821 5,422 4,387 319 28,949 Charge-offs (20) — (10) (301) (331) Recoveries 41 20 113 122 296 Provision 5,814 358 (423) 154 5,903 Originated and acquired ending balance 24,656 5,800 4,067 294 34,817 ASC 310-30 beginning balance — 220 — 5 225 Charge-offs — — — — — Recoveries — — — — — (Recoupment) provision — (86) — 3 (83) ASC 310-30 ending balance — 134 — 8 142 Ending balance $ 24,656 $ 5,934 $ 4,067 $ 302 $ 34,959 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 6,197 $ 1 $ 45 $ 1 $ 6,244 Originated and acquired loans collectively evaluated for impairment 18,459 5,799 4,022 293 28,573 ASC 310-30 loans — 134 — 8 142 Total ending allowance balance $ 24,656 $ 5,934 $ 4,067 $ 302 $ 34,959 Loans: Originated and acquired loans individually evaluated for impairment $ 30,458 $ 551 $ 8,205 $ 165 $ 39,379 Originated and acquired loans collectively evaluated for impairment 1,709,018 472,684 706,294 26,143 2,914,139 ASC 310-30 loans 35,978 83,785 14,012 652 134,427 Total loans $ 1,775,454 $ 557,020 $ 728,511 $ 26,960 $ 3,087,945 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 and six months ended June 30, 2018 were $0.3 million and $0.9 million, respectively. Management's evaluation of credit quality resulted in a provision for originated and acquired loan losses of $1.7 million and $1.7 million during the three and six months ended June 30, 2018, respectively, for general reserves on loan growth. During the six months ended June 30, 2018, the Company re-estimated the expected cash flows of the loan pools accounted for under ASC 310-30. The re-measurement resulted in a provision of $150 thousand and $191 thousand for the three and six months ended June 30, 2018, respectively, driven by provision in the commercial segment. Net charge-offs on originated and acquired loans during the three and six months ended June 30, 2017 were $0.1 million and $0.0 million, respectively. Management’s evaluation resulted in a provision for loan losses on originated and acquired loans of $4.1 million and $5.9 million during the three and six months ended June 30, 2017, respectively. Provision for the three months ended June 30, 2017 included specific reserves of $2.1 million on one commercial loan and general reserves on net loan growth. Provision for the six months ended June 30, 2017 included specific reserves totaling $3.4 million on one energy sector loan and one commercial sector loan. During the six months ended June 30, 2017, the Company re-estimated the expected cash flows of the loan pools accounted for under ASC 310-30. The re-measurement resulted in a net recoupment of $78 thousand and $83 thousand for the three and six months ended June 30, 2017, respectively. The net recoupment was primarily due to a recoupment of $82 thousand in the non-owner occupied commercial real estate segment during the three months ended June 30, 2017, and primarily due to a recoupment of $86 thousand in the non-owner occupied commercial real estate segment for the six months ended June 30, 2017.

Other Real Estate Owned

Other Real Estate Owned	6 Months Ended
	Jun. 30, 2018
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 six months ended June 30, 2018 and 2017 is as follows: For the six months ended June 30, 2018 2017 Beginning balance $ 10,491 $ 15,662 Acquired through acquisition 1,253 — Transfers from loan portfolio, at fair value 24,382 639 Impairments (64) (46) Sales, net (593) (1,958) Ending balance $ 35,469 $ 14,297 The Company transferred one large acquired 310-30 problem loan to OREO totaling $24.1 million at June 30, 2018 as part of its asset resolution process. The Company did not have any minority interest in participated other real estate owned at June 30, 2018. At December 31, 2017, OREO balances excluded $0.7 million of the Company’s minority interests in OREO, which are held by outside banks where the Company was not the lead bank and did not have a controlling interest. The Company maintains a receivable in other assets for these minority interests. Included in Sales, net are net losses of $0.1 million and net gains of $1.8 million for the six months ended June 30, 2018 and 2017, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Note 8 Goodwill and Intangible Assets In connection with all of our acquisitions, the Company recorded goodwill of $115.0 million, core deposit intangible assets of $48.8 million and mortgage servicing rights of $4.3 million. In connection with the acquisition of Peoples completed in the first quarter of 2018, the Company recorded goodwill of $55.4 million, core deposit intangibles assets of $10.5 million and mortgage servicing rights of $4.3 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 or six months ended June 30, 2018 or the year ended December 31, 2017. 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 $0.7 million and $1.4 million during the three and six months ended June 30, 2018, respectively, and $1.4 million and $2.7 million during the three and six months ended June 30, 2017, respectively. 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 $419.8 million at June 30, 2018 and $0.0 million at June 30, 2017. The gross carrying amount of the core deposit intangible and the associated accumulated amortization at June 30, 2018 and December 31, 2017, are presented as follows: June 30, 2018 December 31, 2017 Gross Net Gross Net carrying Accumulated carrying carrying Accumulated carrying amount amortization amount amount amortization amount Core deposit intangible $ 48,834 $ 38,056 $ 10,778 $ 38,357 $ 36,750 $ 1,607 Below are the changes in the mortgage servicing rights for the period presented: For the six months ended June 30, 2018 Beginning balance $ — Acquired through acquisition 4,301 Amortization (386) Ending balance $ 3,915 Fair value of mortgage servicing rights $ 4,473 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 $0.4 million during the three and six months ended June 30, 2018. 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 8.6% to 11.8% for the June 30, 2018 valuation. Mortgage servicing rights are evaluated for impairment and recognized through a valuation allowance 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. There was no valuation allowance at June 30, 2018.

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2018
Disclosure of Repurchase Agreements [Abstract]
Borrowings	Note 9 Borrowings The Company enters into repurchase agreements to facilitate the needs of its clients. As of June 30, 2018 and December 31, 2017, the Company sold securities under agreements to repurchase totaling $73.4 million and $130.5 million, respectively, and none were for periods longer than one day. The Company pledged mortgage-backed securities with a fair value of approximately $76.2 million and $136.1 million as of June 30, 2018 and December 31, 2017, 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 June 30, 2018 and December 31, 2017, the Company had $2.8 million and $5.7 million of excess collateral pledged for repurchase agreements, respectively. 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 $966.1 million at June 30, 2018. At June 30, 2018 and December 31, 2017, the Bank had $77.3 million and $129.1 million in term advances from the FHLB, respectively. The term advances have fixed interest rates of 1.55% - 2.33%, with maturity dates of 2018 - 2020. The Bank had investment securities pledged as collateral for FHLB advances in the amount of $26.1 million at June 30, 2018 and $28.1 million at December 31, 2017. Interest expense related to FHLB advances totaled $0.6 million and $1.1 million for the three and six months ended June 30, 2018, respectively, and $0.5 million and $0.7 million for the three and six months ended June 30, 2017, respectively.

Revenue from Contracts with Cli

Revenue from Contracts with Clients	6 Months Ended
	Jun. 30, 2018
Revenue from Contracts with Clients
Revenue from Contracts with Clients	Note 11 Revenue from Contracts with Clients On January 1, 2018, the Company adopted ASU No. 2014-09 “Revenue from Contracts with Customers” (Topic 606) and all subsequent ASUs that modified Topic 606. As stated in Note 2, Recent A ccounting Pronouncements, the implementation of the new standard did not have a material impact on the measurement or recognition of revenue; as such, a cumulative effect adjustment to opening retained earnings was not deemed necessary. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts were not adjusted and continue to be reported in accordance with our historic accounting under Topic 605. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain noninterest income streams such as fees associated with mortgage servicing rights, financial guarantees, and derivatives are also not in scope of the new guidance. Topic 606 is applicable to noninterest revenue streams such as deposit related fees, interchange fees, and merchant income. However, the recognition of these revenue streams did not change significantly upon adoption of Topic 606. Substantially all of the Company’s revenue is generated from contracts with customers. Noninterest 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 and six months ended June 30, 2018 and 2017. For the three months ended June 30, For the six months ended June 30, 2018 2017 2018 2017 Non-interest income In-scope of Topic 606: Service Charges and other fees $ 5,008 $ 3,899 $ 10,183 $ 7,665 Bank card fees 3,672 3,134 7,034 5,938 Gain on banking center divestiture — 2,942 — 2,942 Non-interest income (in-scope of Topic 606) 8,680 9,975 17,217 16,545 Non-interest income (out-of-scope of Topic 606) 10,882 1,981 20,181 4,107 Total non-interest income $ 19,562 $ 11,956 $ 37,398 $ 20,652 Non-interest expense In-scope of Topic 606: Loss (gain) on OREO sales, net (14) (1,644) 64 (1,756) Total revenue in-scope of Topic 606 $ 8,666 $ 8,331 $ 17,281 $ 14,789 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 noninterest 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 June 30, 2018 and December 31, 2017, 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. Upon adoption of Topic 606, the Company did not capitalize any contract acquisition cost.

Stock-based Compensation and Be

Stock-based Compensation and Benefits	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
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 issued stock options during the six months ended June 30, 2018 and 2017, 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 1-4 years of continuous service and have 7-10 year contractual terms. The following table summarizes stock option activity for the six months ended June 30, 2018: Weighted average Weighted remaining average contractual Aggregate exercise term in intrinsic Options price years value Outstanding at December 31, 2017 1,598,318 $ 20.62 4.07 $ 19,017 Granted 151,937 32.80 Exercised (441,161) 19.90 Forfeited (17,103) 28.57 Outstanding at June 30, 2018 1,291,991 22.20 4.39 21,181 Options exercisable at June 30, 2018 1,039,372 20.16 3.25 19,161 Options vested and expected to vest 1,259,359 21.94 4.26 20,965 Stock option expense is a component of salaries and benefits in the consolidated statements of operations and totaled $0.2 million and $0.2 million for the three months ended June 30, 2018 and 2017, respectively, and $0.4 million and $0.4 million for the six months ended June 30, 2018 and 2017, respectively. At June 30, 2018, there was $1.0 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 2.5 years. Restricted stock awards The Company issued time based restricted stock awards during the six months ended June 30, 2018 and 2017. The restricted stock awards 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. No market-based stock awards were granted during the six months ended June 30, 2018 or June 30, 2017. During the six months ended June 30, 2016, the Company granted market-based stock awards of 26,594 shares in accordance with the 2014 Plan. These shares have a five-year performance period and vest upon the later of the Company’s stock price achieving an established price goal during the performance period and the third anniversary of the date of grant. The $11.28 per share fair value of these awards was determined using a Monte Carlo Simulation at grant date. The market-based performance condition has been met for these awards and the total unrecognized compensation cost related to non-vested market-based stock awards totaled $0.1 million, and is expected to be recognized over a weighted average period of approximately 0.7 years. Performance stock units During the six months ended June 30, 2018 and 2017, the Company granted 77,125 and 49,758 performance stock units in accordance with the 2014 Plan, respectively. These performance stock units granted 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 weighted-average grant date fair value per unit for awards granted during the six months ended June 30, 2018 of the EPS target portion and the TSR target portion was $32.65 and $27.51, respectively. The following table summarizes restricted stock and performance stock unit activity during the six months ended June 30, 2018: Weighted Weighted Restricted average grant- Performance average grant- stock shares date fair value stock units date fair value Unvested at December 31, 2017 163,557 $ 22.60 125,082 $ 23.90 Granted 85,754 33.41 77,125 30.38 Vested (80,092) 22.82 — — Forfeited (13,136) 29.08 (9,884) 26.11 Unvested at June 30, 2018 156,083 $ 27.88 192,323 $ 26.39 As of June 30, 2018, the total unrecognized compensation cost related to the non-vested restricted stock awards and performance stock units totaled $3.0 million and $3.3 million, respectively, and is expected to be recognized over a weighted average period of approximately 2.3 years and 2.2 years, respectively. Expense related to non-vested restricted stock awards totaled $0.6 million and $0.6 million during the three months ended June 30, 2018 and 2017, respectively, and $1.0 million and $1.2 million during the six months ended June 30, 2018 and 2017, respectively. Expense related to non-vested performance stock units totaled $0.4 million and $0.2 million during the three months ended June 30, 2018 and 2017, respectively, and $0.7 million and $0.4 million during the six months ended June 30, 2018 and 2017, 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 June 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 349,199 was available for issuance. Under the ESPP, employees purchased 5,960 shares during the six months ended June 30, 2018, respectively, and 5,373 shares during the six months ended June 30, 2017, respectively.

Warrants

Warrants	6 Months Ended
	Jun. 30, 2018
Warrants and Rights Note Disclosure [Abstract]
Warrants	Note 13 Warrants During the first quarter of 2017, 250,750 warrants were exercised in a non-cash transaction, representing the remaining outstanding warrants. The warrants were granted to certain lead shareholders of the Company at the time of the Company’s initial capital raise (2009-2010), all with an exercise price of $20.00 per share. Refer to the consolidated statements of changes in shareholders’ equity for additional detail.

Common Stock

Common Stock	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Common Stock	Note 14 Common Stock The Company had 30,726,789 and 26,875,585 shares of Class A common stock outstanding at June 30, 2018 and December 31, 2017, respectively. Additionally, the Company had 156,083 and 163,557 shares outstanding at June 30, 2018 and December 31, 2017, respectively, of restricted Class A common stock issued but not yet vested under the 2014 Plan and the Prior 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 for up to $50.0 million from time to time in either the open market or through privately negotiated transactions. The remaining authorization under this program as of June 30, 2018 was $12.6 million.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Income Per Share	Note 15 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 30,726,789 and 26,788,833 shares of Class A common stock outstanding as of June 30, 2018 and 2017, 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 and six months ended June 30, 2018 and 2017. The following table illustrates the computation of basic and diluted earnings per share for the three and six months ended June 30, 2018 and 2017: For the three months ended For the six months ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Net income $ 17,512 $ 9,209 $ 25,977 $ 17,467 Less: income allocated to participating securities (18) (14) (31) (30) Income allocated to common shareholders $ 17,494 $ 9,195 $ 25,946 $ 17,437 Weighted average shares outstanding for basic earnings per common share 30,735,427 26,955,187 30,615,226 26,878,904 Dilutive effect of equity awards 651,748 642,256 660,133 742,001 Dilutive effect of warrants — — — 16,627 Weighted average shares outstanding for diluted earnings per common share 31,387,175 27,597,443 31,275,359 27,637,532 Basic earnings per share $ 0.57 $ 0.34 $ 0.85 $ Diluted earnings per share $ 0.56 $ 0.33 $ 0.83 $ The Company had 1,291,991 and 1,683,867 outstanding stock options to purchase common stock at weighted average exercise prices of $22.20 and $20.61 per share at June 30, 2018 and 2017, 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. Additionally, 250,750 warrants were exercised in a non-cash transaction during the first quarter of 2017, representing the remaining outstanding warrants to purchase shares of the Company’s common stock. The warrants had an exercise price of $20.00. The Company had 348,406 and 256,064 unvested restricted shares and units issued as of June 30, 2018 and 2017, 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.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 16 Income Taxes The effective income tax rate for the three and six months ended June 30, 2018 was 13.8% and 14.8%, respectively, compared to 19.1% and 5.1% for the three and six months ended June 30, 2017, calculated based on a full year forecast method. The tax expense recorded for the three and six months ended June 30, 2018 was lowered by a $0.8 million and $1.2 million discrete tax benefit from stock compensation activity during the respective periods. Without the discrete benefits, the three and six months ended June 30, 2018 effective tax rate was 17.7% and 18.6%, respectively. The tax expense recorded for the three and six months ended June 30, 2017 was lowered by a $0.5 million and $3.4 million tax benefit from stock compensation activity. The quarterly tax rate differs from the federal statutory rate primarily due to tax benefits from stock compensation activity, interest income from tax-exempt lending, bank-owned life insurance income, and the relationship of these items to pre-tax income. See management’s discussion and analysis for further information.

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Note 17 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 June 30, 2018 and December 31, 2017. Information about the valuation methods used to measure fair value is provided in note 19. Asset derivatives fair value Liability derivatives fair value Balance Sheet June 30, December 31, Balance Sheet June 30, December 31, location 2018 2017 location 2018 2017 Derivatives designated as hedging instruments: Interest rate products Other assets $ 26,667 $ 10,489 Other liabilities $ 3 $ 1,167 Total derivatives designated as hedging instruments $ 26,667 $ 10,489 $ 3 $ 1,167 Derivatives not designated as hedging instruments: Interest rate products Other assets $ 4,014 $ 2,483 Other liabilities $ 3,992 $ 2,584 Interest rate lock commitments Other assets 1,466 128 Other liabilities 252 — Forward contracts Other assets 25 5 Other liabilities 538 7 Total derivatives not designated as hedging instruments $ 5,505 $ 2,616 $ 4,782 $ 2,591 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 June 30, 2018, the Company had interest rate swaps with a notional amount of $468.1 million, which were designated as fair value hedges of interest rate risk. These interest rate swaps were associated with $506.5 million of the Company’s fixed-rate loans, before a $(27.0) million fair value hedge adjustment in the carrying amount, included in loans receivable on the statements of financial condition. As of December 31, 2017, the Company had interest rate swaps with a notional amount of $417.7 million that were designated as fair value hedges. 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 June 30, 2018, the Company had matched interest rate swap transactions with an aggregate notional amount of $174.0 million related to this program. As of December 31, 2017, the Company had matched interest rate swap transactions with an aggregate notional amount of $202.2 million related to this program. As part of its mortgage banking activities, the Company enters into interest rate lock commitments, which are commitments to originate loans where the interest rate on the loan is determined prior to funding and the clients have locked into that interest rate. The Company then locks in the loan and interest rate with an investor and commits to deliver the loan if settlement occurs ("best efforts") or commits to deliver the locked loan in a binding ("mandatory") delivery program with an investor. Fair value changes of certain loans under interest rate lock commitments are hedged with forward sales contracts of MBS. Forward sales contracts of MBS are recorded at fair value with changes in fair value recorded in non-interest income. Interest rate lock commitments and commitments to deliver loans to investors are considered derivatives. The market value of interest rate lock commitments and best efforts contracts are not readily ascertainable with precision because they are not actively traded in stand-alone markets. The Company determines the fair value of interest rate lock commitments and delivery contracts by measuring the fair value of the underlying 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 $113.5 million and forward contracts with a notional value of $178.7 million at June 30, 2018. At December 31, 2017, the Company had interest rate lock commitments with a notional value of $8.0 million and forward contracts with a notional value of $9.0 million . Effect of derivative instruments on the consolidated statements of operations The tables below present the effect of the Company’s derivative financial instruments on the consolidated statements of operations for the three and six months ended June 30, 2018 and 2017: Location of gain (loss) Amount of gain (loss) recognized in income on derivatives Derivatives in fair value recognized in income on For the three months ended June 30, For the six months ended June 30, hedging relationships derivatives 2018 2017 2018 2017 Interest rate products Interest and fees on loans $ 5,288 $ — $ 17,340 $ — Interest rate products Other non-interest income — (3,169) — (2,105) Total $ 5,288 $ (3,169) $ 17,340 $ (2,105) Location of gain (loss) Amount of gain (loss) recognized in income on hedged items recognized in income on For the three months ended June 30, For the six months ended June 30, Hedged items hedged items 2018 2017 2018 2017 Interest rate products Interest and fees on loans $ (5,347) $ — $ (17,264) $ — Interest rate products Other non-interest income — 2,962 — 1,720 Total $ (5,347) $ 2,962 $ (17,264) $ 1,720 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 June 30, For the six months ended June 30, as hedging instruments derivatives 2018 2017 2018 2017 Interest rate products Other non-interest expense $ 3 $ (47) $ 124 $ (79) Interest rate lock commitments Mortgage banking income (517) (122) (141) 1 Forward contracts Mortgage banking income 305 63 1,413 (131) Total $ (209) $ (106) $ 1,396 $ (209) 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 June 30, 2018, the termination value of derivatives in a net liability position related to these agreements was $4.0 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 June 30, 2018 the Company had posted $0.2 million in eligible collateral. If the Company had breached any of these provisions at June 30, 2018, it could have been required to settle its obligations under the agreements at the termination value.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 18 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 June 30, 2018 and December 31, 2017, the Company had loan commitments totaling $764.6 million and $680.8 million, respectively, and standby letters of credit that totaled $8.3 million and $7.2 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 June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Commitments to fund loans $ 231,844 $ 181,904 Unfunded commitments under lines of credit 532,778 498,857 Commercial and standby letters of credit 8,260 7,185 Total unfunded commitments $ 772,882 $ 687,946 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. Mortgage loans sold to investors may be subject to repurchase or indemnification in the event of specific default by the borrower or subsequent discovery that underwriting standards were not met. The Company established a reserve liability for expected losses related to these representations and warranties based upon management’s evaluation of actual and historic loss history, delinquency trends in the portfolio and economic conditions. The Company recorded a repurchase reserve of $4.0 million at June 30, 2018, which is included in other liabilities on the consolidated statements of financial condition. Contingencies 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	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 19 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 inputs to 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 six months ended June 30, 2018 and 2017, 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 June 30, 2018 and December 31, 2017, 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 classifies 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 June 30, 2018 and December 31, 2017 on the consolidated statements of financial condition utilizing the hierarchy structure described above: June 30, 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 $ — $ 171,255 $ — $ 171,255 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 683,983 — 683,983 Municipal securities — 825 — 825 Loans held for sale — 113,057 — 113,057 Interest rate swap derivatives — 30,681 — 30,681 Mortgage banking derivatives — — 1,491 1,491 Total assets at fair value $ — $ 999,801 $ 1,491 $ 1,001,292 Liabilities: Interest rate swap derivatives $ — $ 3,995 $ — $ 3,995 Mortgage banking derivatives — — 790 Total liabilities at fair value $ — $ 3,995 $ 790 $ 4,785 December 31, 2017 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 $ — $ 168,648 $ — $ 168,648 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 685,230 — 685,230 Municipal securities — 829 — 829 Loans held for sale — 4,629 — 4,629 Interest rate swap derivatives — 12,972 — 12,972 Mortgage banking derivatives — — 133 Total assets at fair value $ — $ 872,308 $ 133 $ 872,441 Liabilities: Interest rate swap derivatives $ — $ 3,751 $ — $ 3,751 Mortgage banking derivatives — — 7 Total liabilities at fair value $ — $ 3,751 $ 7 $ 3,758 The table below details the changes in level 3 financial instruments during the six months ended June 30, 2018: Mortgage banking derivatives, net Balance at December 31, 2017 $ 126 Gain included in earnings, net 575 Balance at June 30, 2018 $ 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. 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 June 30, 2018, the Company measured six originated and acquired loans at fair value on a non-recurring basis, with a carrying balance of $6.3 million and specific reserve balance of $1.2 million. At June 30, 2017, the Company measured seven originated and acquired loans at fair value on a non-recurring basis, with a carrying balance of $14.5 million and specific reserve balance of $6.2 million. OREO is recorded at the lower of the cost basis or 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 $64 thousand and $46 thousand of OREO impairments in its consolidated statements of operations during the six months ended June 30, 2018 and 2017, 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 values of OREO are considered level 3 inputs in the fair value hierarchy. 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 June 30, 2018 and prepayment speed assumption ranges of 8.6% to 11.8% at June 30, 2018 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 no valuation allowance recorded at June 30, 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 table below provides information regarding the assets recorded at fair value on a non-recurring basis during the six months ended June 30, 2018 and 2017: June 30, 2018 Total Losses from fair value changes Impaired loans $ 34,822 $ 1,089 Other real estate owned 35,469 64 Mortgage servicing rights 3,915 — Total $ 74,205 $ 1,153 June 30, 2017 Total Losses from fair value changes Impaired loans $ 39,379 $ 327 Other real estate owned 14,297 46 Total $ 53,676 $ 373 The Company did not record any liabilities measured at fair value on a non-recurring basis during the six months ended June 30, 2018.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 20 Fair Value of Financial Instruments The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction in the principal market at the measurement date under current market conditions. 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 notion set forth by ASU 2016-01 effective January 1, 2018 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 June 30, 2018 and December 31, 2017, including methods and assumptions utilized for determining fair value of financial instruments, are set forth below: Level in fair value June 30, 2018 December 31, 2017 measurement Carrying Estimated Carrying Estimated hierarchy amount fair value amount fair value ASSETS Cash and cash equivalents Level 1 $ 137,917 $ 137,917 $ 257,364 $ 257,364 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 171,255 171,255 168,648 168,648 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 683,983 683,983 685,230 685,230 Municipal securities Level 2 825 825 829 829 Municipal securities Level 3 219 219 219 219 Other available-for-sale securities Level 3 469 469 419 419 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 178,946 175,471 204,352 204,048 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 87,251 84,739 54,378 52,723 Non-marketable securities Level 2 20,070 20,070 15,030 15,030 Loans receivable Level 3 3,825,555 3,776,564 3,178,947 3,167,508 Loans held for sale Level 2 113,057 113,057 4,629 4,629 Accrued interest receivable Level 2 18,147 18,147 14,255 14,255 Interest rate swap derivatives Level 2 30,681 30,681 12,972 12,972 Mortgage banking derivatives Level 3 1,491 1,491 133 133 LIABILITIES Deposit transaction accounts Level 2 3,499,133 3,499,133 2,861,509 2,861,509 Time deposits Level 2 1,132,331 1,132,331 1,118,050 1,118,050 Securities sold under agreements to repurchase Level 2 73,441 73,441 130,463 130,463 Federal Home Loan Bank advances Level 2 188,334 188,579 129,115 130,300 Accrued interest payable Level 2 6,136 6,136 5,776 5,776 Interest rate swap derivatives Level 2 3,995 3,995 3,751 3,751 Mortgage banking derivatives Level 3 7 7

Investment Securities - (Tables

Investment Securities - (Tables)	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities	At June 30, 2018 and December 31, 2017, the Company held $856.8 million and $855.3 million of available-for-sale investment securities, respectively. Available-for-sale securities are summarized as follows as of the dates indicated: June 30, 2018 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 $ 172,595 $ 1,429 $ (2,769) $ 171,255 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 710,097 116 (26,230) 683,983 Municipal securities 1,054 — (10) 1,044 Other securities 469 — — 469 Total investment securities available-for-sale $ 884,215 $ 1,545 $ (29,009) $ 856,751 December 31, 2017 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 $ 167,269 $ 2,371 $ (992) $ 168,648 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 702,107 351 (17,228) 685,230 Municipal securities 1,054 — (6) 1,048 Other securities 419 — — 419 Total investment securities available-for-sale $ 870,849 $ 2,722 $ (18,226) $ 855,345
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: June 30, 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 $ 93,407 $ (1,923) $ 28,208 $ (846) $ 121,615 $ (2,769) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 297,510 (5,435) 361,595 (20,795) 659,105 (26,230) Municipal securities 510 (10) — — 510 (10) Total $ 391,427 $ (7,368) $ 389,803 $ (21,641) $ 781,230 $ (29,009) December 31, 2017 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 $ 62,178 $ (408) $ 36,086 $ (584) $ 98,264 $ (992) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 162,346 (830) 412,967 (16,398) 575,313 (17,228) Municipal securities 514 (6) — — 514 (6) Total $ 225,038 $ (1,244) $ 449,053 $ (16,982) $ 674,091 $ (18,226)
Held-to-maturity Securities	Held-to-maturity investment securities are summarized as follows as of the dates indicated: June 30, 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 $ 178,946 $ 2 $ (3,477) $ 175,471 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 87,251 — (2,512) 84,739 Total investment securities held-to-maturity $ $ 2 $ (5,989) $ 260,210 December 31, 2017 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 $ 204,352 $ 151 $ (455) $ 204,048 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 54,378 — (1,655) 52,723 Total investment securities held-to-maturity $ 258,730 $ 151 $ (2,110) $ 256,771
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: June 30, 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 $ 158,592 $ (2,972) $ 15,245 $ (506) $ 173,837 $ (3,478) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 44,284 (414) 40,456 (2,097) 84,740 (2,511) Total $ 202,876 $ (3,386) $ 55,701 $ (2,603) $ 258,577 $ (5,989) December 31, 2017 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 $ 149,182 $ (220) $ 17,506 $ (235) $ 166,688 $ (455) Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises 6,460 (65) 46,264 (1,590) 52,724 (1,655) Total $ 155,642 $ (285) $ 63,770 $ (1,825) $ 219,412 $ (2,110)

Loans - (Tables)

Loans - (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loan Portfolio Composition Including Carrying Value by Segment of 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, costs and fair value marks of $9.8 million and $4.3 million as of June 30, 2018 and December 31, 2017, respectively. June 30, 2018 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 2,295,041 $ 23,078 $ 2,318,119 Commercial real estate non-owner occupied 594,740 48,411 643,151 Residential real estate 826,670 11,365 838,035 Consumer 26,150 100 26,250 Total $ 3,742,601 $ 82,954 $ 3,825,555 December 31, 2017 Originated and ASC acquired loans 310-30 loans Total loans % of total Commercial $ 1,845,130 $ 29,475 $ 1,874,605 Commercial real estate non-owner occupied 485,141 77,908 563,049 Residential real estate 703,478 12,759 716,237 Consumer 24,575 481 25,056 Total $ 3,058,324 $ 120,623 $ 3,178,947
Past Due Financing Receivables	Delinquency for originated and acquired loans is shown in the following tables at June 30, 2018 and December 31, 2017: June 30, 2018 Greater Total Loans > 90 30-59 60-89 than 90 originated and days past days past days past days past Total past acquired due and Non- due due due due Current loans still accruing accrual Originated and acquired loans: Commercial: Commercial and industrial $ 1,765 $ 2,644 $ 2,305 $ 6,714 $ 1,673,659 $ 1,680,373 $ 40 $ 5,545 Owner occupied commercial real estate 1,465 471 2,287 4,223 378,428 382,651 460 6,479 Agriculture 194 217 718 1,129 193,667 194,796 — 2,108 Energy — — 796 796 36,425 37,221 — 796 Total commercial 3,424 3,332 6,106 12,862 2,282,179 2,295,041 500 14,928 Commercial real estate non-owner occupied: Construction 1,208 — 1,080 2,288 92,169 94,457 — 1,080 Acquisition/development — 17 — 17 23,574 23,591 — 824 Multifamily — — — — 63,483 63,483 — — Non-owner occupied 19 332 142 493 412,716 413,209 142 597 Total commercial real estate 1,227 349 1,222 2,798 591,942 594,740 142 2,501 Residential real estate: Senior lien 2,733 1,777 2,426 6,936 719,540 726,476 366 7,372 Junior lien 982 49 191 1,222 98,972 100,194 16 792 Total residential real estate 3,715 1,826 2,617 8,158 818,512 826,670 382 8,164 Consumer 278 94 98 470 25,680 26,150 80 42 Total originated and acquired loans $ 8,644 $ 5,601 $ 10,043 $ 24,288 $ 3,718,313 $ 3,742,601 $ 1,104 $ 25,635 December 31, 2017 Greater Total Loans > 90 30-59 60-89 than 90 originated and days past days past days past days past Total past acquired due and Non- due due due due Current loans still accruing accrual Originated and acquired loans: Commercial: Commercial and industrial $ 554 $ 117 $ 1,389 $ 2,060 $ 1,373,962 $ 1,376,022 $ 150 $ 7,767 Owner occupied commercial real estate 696 — 1,983 2,679 270,074 272,753 — 3,478 Agriculture 585 — 701 1,286 137,609 138,895 — 2,003 Energy — — 1,645 1,645 55,815 57,460 — 1,645 Total commercial 1,835 117 5,718 7,670 1,837,460 1,845,130 150 14,893 Commercial real estate non-owner occupied: Construction — — 179 179 107,502 107,681 — 179 Acquisition/development 1,097 — — 1,097 13,318 14,415 — — Multifamily — — — — 26,947 26,947 — — Non-owner occupied 56 — 574 630 335,468 336,098 — 605 Total commercial real estate 1,153 — 753 1,906 483,235 485,141 — 784 Residential real estate: Senior lien 1,167 885 1,396 3,448 643,034 646,482 — 4,724 Junior lien 233 91 41 365 56,631 56,996 — 459 Total residential real estate 1,400 976 1,437 3,813 699,665 703,478 — 5,183 Consumer 157 6 5 168 24,407 24,575 — 140 Total originated and acquired loans $ 4,545 $ 1,099 $ 7,913 $ 13,557 $ 3,044,767 $ 3,058,324 $ 150 $ 21,000
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 as of June 30, 2018 and December 31, 2017, respectively: June 30, 2018 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,649,254 $ 12,988 $ 17,232 $ 899 $ 1,680,373 Owner occupied commercial real estate 346,325 26,910 9,341 75 382,651 Agriculture 189,923 2,765 1,890 218 194,796 Energy 36,425 — 796 — 37,221 Total commercial 2,221,927 42,663 29,259 1,192 2,295,041 Commercial real estate non-owner occupied: Construction 93,377 — 1,080 — 94,457 Acquisition/development 22,767 — 824 — 23,591 Multifamily 63,483 — — — 63,483 Non-owner occupied 395,921 15,641 1,647 — 413,209 Total commercial real estate 575,548 15,641 3,551 — 594,740 Residential real estate: Senior lien 713,175 5,338 7,963 — 726,476 Junior lien 98,623 504 1,067 — 100,194 Total residential real estate 811,798 5,842 9,030 — 826,670 Consumer 26,107 1 42 — 26,150 Total originated and acquired loans $ 3,635,380 $ 64,147 $ 41,882 $ 1,192 $ 3,742,601 Loans accounted for under ASC 310-30: Commercial $ 18,610 $ 1,051 $ 3,417 $ — $ 23,078 Commercial real estate non-owner occupied 46,291 950 1,165 — 48,406 Residential real estate 8,860 947 1,558 — 11,365 Consumer — — 105 — 105 Total loans accounted for under ASC 310-30 $ 73,761 $ 2,948 $ 6,245 $ — $ 82,954 Total loans $ 3,709,141 $ 67,095 $ 48,127 $ 1,192 $ 3,825,555 December 31, 2017 Special Pass mention Substandard Doubtful Total Originated and acquired loans: Commercial: Commercial and industrial $ 1,349,116 $ 10,829 $ 14,824 $ 1,253 $ 1,376,022 Owner occupied commercial real estate 250,224 17,030 5,424 75 272,753 Agriculture 118,068 18,824 1,870 133 138,895 Energy 55,814 — 1,646 — 57,460 Total commercial 1,773,222 46,683 23,764 1,461 1,845,130 Commercial real estate non-owner occupied: Construction 107,502 — 179 — 107,681 Acquisition/development 14,415 — — — 14,415 Multifamily 24,817 — 2,130 — 26,947 Non-owner occupied 333,225 1,396 1,477 — 336,098 Total commercial real estate 479,959 1,396 3,786 — 485,141 Residential real estate: Senior lien 641,294 91 5,097 — 646,482 Junior lien 56,172 — 824 — 56,996 Total residential real estate 697,466 91 5,921 — 703,478 Consumer 24,432 1 142 — 24,575 Total originated and acquired loans $ 2,975,079 $ 48,171 $ 33,613 $ 1,461 $ 3,058,324 Loans accounted for under ASC 310-30: Commercial $ 23,954 $ 1,070 $ 4,451 $ — $ 29,475 Commercial real estate non-owner occupied 50,537 883 26,488 — 77,908 Residential real estate 10,072 1,055 1,632 — 12,759 Consumer 327 9 145 — 481 Total loans accounted for under ASC 310-30 $ 84,890 $ 3,017 $ 32,716 $ — $ 120,623 Total loans $ 3,059,969 $ 51,188 $ 66,329 $ 1,461 $ 3,178,947
Schedule Of Impaired Financing Receivable With And Without Related Allowance	Additional information regarding impaired loans at June 30, 2018 and December 31, 2017 is set forth in the table below: June 30, 2018 December 31, 2017 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 $ 5,719 $ 4,209 $ — $ 6,481 $ 5,055 $ — Owner occupied commercial real estate 7,063 6,698 — 4,186 3,934 — Agriculture 1,508 1,259 — 1,502 1,245 — Energy 6,642 1,923 — 8,661 3,861 — Total commercial 20,932 14,089 — 20,830 14,095 — Commercial real estate non-owner occupied: Construction 1,307 1,082 — 215 179 — Acquisition/development 1,065 824 — — — — Multifamily — — — 29 29 — Non-owner occupied 648 569 — 901 853 — Total commercial real estate 3,020 2,475 — 1,145 1,061 — Residential real estate: Senior lien 3,075 2,781 — 333 309 — Junior lien 414 353 — — — — Total residential real estate 3,489 3,134 — 333 309 — Consumer 47 43 — — — — Total impaired loans with no related allowance recorded $ 27,488 $ 19,741 $ — $ 22,308 $ 15,465 $ — With a related allowance recorded: Commercial: Commercial and industrial $ 7,147 $ 4,539 $ 907 $ 7,919 $ 5,339 $ 1,329 Owner occupied commercial real estate 1,400 1,222 80 873 713 4 Agriculture 2,229 2,186 218 2,122 2,083 133 Energy — — — — — — Total commercial 10,776 7,947 1,205 10,914 8,135 1,466 Commercial real estate non-owner occupied: Construction — — — — — — Acquisition/development — — — — — — Multifamily — — — — — — Non-owner occupied 347 293 2 207 200 1 Total commercial real estate 347 293 2 207 200 1 Residential real estate: Senior lien 6,509 5,672 25 6,481 5,753 24 Junior lien 1,308 1,169 7 1,295 1,179 8 Total residential real estate 7,817 6,841 32 7,776 6,932 32 Consumer — — — 146 141 1 Total impaired loans with a related allowance recorded $ 18,940 $ 15,081 $ 1,239 $ 19,043 $ 15,408 $ 1,500 Total impaired loans $ 46,428 $ 34,822 $ 1,239 $ 41,351 $ 30,873 $ 1,500
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 June 30, 2018 June 30, 2017 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 5,321 $ 90 $ 6,645 $ 25 Owner occupied commercial real estate 6,723 17 3,789 23 Agriculture 1,259 — 1,454 — Energy 1,843 17 5,680 — Total commercial 15,147 124 17,568 48 Commercial real estate non-owner occupied: Construction 1,081 — — — Acquisition/development 827 — — — Multifamily — — — — Non-owner occupied 574 — 312 5 Total commercial real estate 2,481 — 312 5 Residential real estate: Senior lien 2,818 — 330 — Junior lien 354 — — — Total residential real estate 3,172 — 330 — Consumer 14 — — — Total impaired loans with no related allowance recorded $ 20,815 $ 124 $ 18,210 $ 53 With a related allowance recorded: Commercial: Commercial and industrial $ 4,607 $ — $ 4,643 $ — Owner occupied commercial real estate 1,233 4 2,340 7 Agriculture 2,142 1 912 1 Energy — — 6,624 — Total commercial 7,982 5 14,519 8 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily 9 — 31 — Non-owner occupied 297 5 216 2 Total commercial real estate 306 5 247 2 Residential real estate: Senior lien 5,744 13 6,525 20 Junior lien 1,187 11 1,403 12 Total residential real estate 6,931 23 7,928 32 Consumer 31 — 169 — Total impaired loans with a related allowance recorded $ 15,250 $ 33 $ 22,863 $ 42 Total impaired loans $ 36,065 $ 158 $ 41,073 $ 95 For the six months ended June 30, 2018 June 30, 2017 Average Interest Average Interest With no related allowance recorded: Commercial: Commercial and industrial $ 5,565 $ 173 $ 7,030 $ 73 Owner occupied commercial real estate 6,793 35 3,834 41 Agriculture 1,259 6 1,531 — Energy 2,098 37 5,889 — Total Commercial 15,715 251 18,284 114 Commercial real estate non-owner occupied: Construction 1,081 — — — Acquisition/development 856 — — — Multifamily — — — — Non-owner occupied 591 — 320 12 Total commercial real estate 2,528 — 320 12 Residential real estate: Senior lien 2,846 — 334 — Junior lien 358 — — — Total residential real estate 3,204 — 334 — Consumer 14 — — — Total impaired loans with no related allowance recorded $ 21,461 $ 251 $ 18,938 $ 126 With a related allowance recorded: Commercial: Commercial and industrial $ 4,639 $ — $ 4,630 $ — Owner occupied commercial real estate 1,249 9 2,349 11 Agriculture 2,084 2 914 3 Energy — — 6,602 — Total Commercial 7,972 11 14,495 14 Commercial real estate non-owner occupied: Construction — — — — Acquisition/development — — — — Multifamily 19 — 31 1 Non-owner occupied 308 9 220 5 Total commercial real estate 327 9 251 6 Residential real estate: Senior lien 5,821 26 6,583 40 Junior lien 1,202 20 1,421 25 Total residential real estate 7,023 46 8,004 65 Consumer 32 — 175 — Total impaired loans with a related allowance recorded $ 15,354 $ 66 $ 22,925 $ 85 Total impaired loans $ 36,815 $ 317 $ 41,863 $ 211
Additional Information Related to Accruing TDR's	The tables below provide additional information related to accruing TDRs at June 30, 2018 and December 31, 2017: June 30, 2018 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 5,509 $ 6,754 $ 6,299 $ 3,828 Commercial real estate non-owner occupied 266 278 311 — Residential real estate 1,165 1,190 1,172 12 Consumer — — — — Total $ 6,940 $ 8,222 $ 7,782 $ 3,840 December 31, 2017 Recorded Average year-to-date Unpaid Unfunded commitments investment recorded investment principal balance to fund TDRs Commercial $ 6,595 $ 7,308 $ 7,171 $ 2,041 Commercial real estate non-owner occupied 455 489 500 — Residential real estate 1,409 1,461 1,420 2 Consumer 1 3 1 — Total $ 8,460 $ 9,261 $ 9,092 $ 2,043
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 June 30, 2018 and December 31, 2017: June 30, 2018 December 31, 2017 Commercial $ 2,698 $ 5,808 Commercial real estate non-owner occupied — — Residential real estate 1,264 1,336 Consumer — 111 Total non-accruing TDRs $ 3,962 $ 7,255
Re-Measurement of Loans Accounted for Under ASC Topic 310-30 Resulting in Changes in Carrying Amount of Accretable Yield	The re-measurement of loans accounted for under ASC 310-30 resulted in the following changes in the carrying amount of accretable yield during the six months ended June 30, 2018 and 2017: June 30, 2018 June 30, 2017 Accretable yield beginning balance $ 46,568 $ 60,476 Reclassification from non-accretable difference 8,053 7,732 Reclassification to non-accretable difference (1,695) (494) Accretion (10,224) (12,051) Accretable yield ending balance $ 42,702 $ 55,663
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 June 30, 2018 and December 31, 2017: June 30, 2018 December 31, 2017 Contractual cash flows $ 442,000 $ 489,892 Non-accretable difference (316,344) (322,701) Accretable yield (42,702) (46,568) Loans accounted for under ASC 310-30 $ 82,954 $ 120,623

Allowance for Loan Losses - (Ta

Allowance for Loan Losses - (Tables)	6 Months Ended
	Jun. 30, 2018
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 and six months ended June 30, 2018 and 2017: Three months ended June 30, 2018 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 21,578 $ 4,890 $ 3,928 $ 290 $ 30,686 Originated and acquired beginning balance 21,485 4,871 3,928 290 30,574 Charge-offs — (11) (90) (234) (335) Recoveries 13 — 4 50 67 Provision 1,902 (318) (61) 200 1,723 Originated and acquired ending balance 23,400 4,542 3,781 306 32,029 ASC 310-30 beginning balance 93 19 — — 112 Charge-offs (61) — — — (61) Recoveries — — — — — Provision 150 — — — 150 ASC 310-30 ending balance 182 19 — — 201 Ending balance $ 23,582 $ 4,561 $ 3,781 $ 306 $ 32,230 Three months ended June 30, 2017 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 20,539 $ 5,815 $ 4,216 $ 280 $ 30,850 Originated and acquired beginning balance 20,539 5,599 4,216 276 30,630 Charge-offs — — (2) (119) (121) Recoveries 30 10 110 55 205 Provision 4,087 191 (257) 82 4,103 Originated and acquired ending balance 24,656 5,800 4,067 294 34,817 ASC 310-30 beginning balance — 216 — 4 220 Charge-offs — — — — — Recoveries — — — — — (Recoupment) provision — (82) — 4 (78) ASC 310-30 ending balance — 134 — 8 142 Ending balance $ 24,656 $ 5,934 $ 4,067 $ 302 $ 34,959 Six months ended June 30, 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) (11) (90) (513) (1,051) Recoveries 55 — 6 103 164 Provision 2,442 (1,030) (100) 411 1,723 Originated and acquired ending balance 23,400 4,542 3,781 306 32,029 ASC 310-30 beginning balance 45 26 — — 71 Charge-offs (61) — — — (61) Recoveries — — — — — Provision (recoupment) 198 (7) — — 191 ASC 310-30 ending balance 182 19 — — 201 Ending balance $ 23,582 $ 4,561 $ 3,781 $ 306 $ 32,230 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 1,204 $ 2 $ 32 $ 1 $ 1,239 Originated and acquired loans collectively evaluated for impairment 22,196 4,540 3,749 305 30,790 ASC 310-30 loans 182 19 — — 201 Total ending allowance balance $ 23,582 $ 4,561 $ 3,781 $ 306 $ 32,230 Loans: Originated and acquired loans individually evaluated for impairment $ 22,038 $ 2,767 $ 9,974 $ 43 $ 34,822 Originated and acquired loans collectively evaluated for impairment 2,273,002 591,974 816,696 26,107 3,707,779 ASC 310-30 loans 23,078 48,411 11,365 100 82,954 Total loans $ 2,318,118 $ 643,152 $ 838,035 $ 26,250 $ 3,825,555 Six months ended June 30, 2017 Non-owner occupied commercial Residential Commercial real estate real estate Consumer Total Beginning balance $ 18,821 $ 5,642 $ 4,387 $ 324 $ 29,174 Originated and acquired beginning balance 18,821 5,422 4,387 319 28,949 Charge-offs (20) — (10) (301) (331) Recoveries 41 20 113 122 296 Provision 5,814 358 (423) 154 5,903 Originated and acquired ending balance 24,656 5,800 4,067 294 34,817 ASC 310-30 beginning balance — 220 — 5 225 Charge-offs — — — — — Recoveries — — — — — (Recoupment) provision — (86) — 3 (83) ASC 310-30 ending balance — 134 — 8 142 Ending balance $ 24,656 $ 5,934 $ 4,067 $ 302 $ 34,959 Ending allowance balance attributable to: Originated and acquired loans individually evaluated for impairment $ 6,197 $ 1 $ 45 $ 1 $ 6,244 Originated and acquired loans collectively evaluated for impairment 18,459 5,799 4,022 293 28,573 ASC 310-30 loans — 134 — 8 142 Total ending allowance balance $ 24,656 $ 5,934 $ 4,067 $ 302 $ 34,959 Loans: Originated and acquired loans individually evaluated for impairment $ 30,458 $ 551 $ 8,205 $ 165 $ 39,379 Originated and acquired loans collectively evaluated for impairment 1,709,018 472,684 706,294 26,143 2,914,139 ASC 310-30 loans 35,978 83,785 14,012 652 134,427 Total loans $ 1,775,454 $ 557,020 $ 728,511 $ 26,960 $ 3,087,945

Other Real Estate Owned - (Tabl

Other Real Estate Owned - (Tables)	6 Months Ended
	Jun. 30, 2018
FDIC Loss-Sharing Related
Summary of Activity in OREO Balances	A summary of the activity in the OREO balances during the six months ended June 30, 2018 and 2017 is as follows: For the six months ended June 30, 2018 2017 Beginning balance $ 10,491 $ 15,662 Acquired through acquisition 1,253 — Transfers from loan portfolio, at fair value 24,382 639 Impairments (64) (46) Sales, net (593) (1,958) Ending balance $ 35,469 $ 14,297

Goodwill and Intangible Assets

Goodwill and Intangible Assets - (Tables)	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of gross carrying amount of intangible assets and the associated accumulated amortization	June 30, 2018 December 31, 2017 Gross Net Gross Net carrying Accumulated carrying carrying Accumulated carrying amount amortization amount amount amortization amount Core deposit intangible $ 48,834 $ 38,056 $ 10,778 $ 38,357 $ 36,750 $ 1,607
Summary of changes in the mortgage servicing rights	For the six months ended June 30, 2018 Beginning balance $ — Acquired through acquisition 4,301 Amortization (386) Ending balance $ 3,915 Fair value of mortgage servicing rights $ 4,473

Regulatory Capital - (Tables)

Regulatory Capital - (Tables)	6 Months Ended
	Jun. 30, 2018
FDIC Loss-Sharing Related
Capital Ratio Requirements under Prompt Corrective Action or Other Regulatory Requirements	June 30, 2018 Required to be Required to be well capitalized under considered prompt corrective adequately Actual action provisions capitalized (1) Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: Consolidated $ 546,964 N/A N/A $ 220,575 NBH Bank 493,193 $ 274,980 219,984 Common equity tier 1 risk-based capital: Consolidated $ 546,964 N/A N/A $ 386,006 NBH Bank 493,193 $ 357,474 384,972 Tier 1 risk-based capital ratio: Consolidated $ 546,964 N/A N/A $ 368,452 NBH Bank 493,193 $ 345,168 366,741 Total risk-based capital ratio: Consolidated $ 584,008 N/A N/A $ 455,147 NBH Bank 530,236 $ 431,460 453,033 December 31, 2017 Required to be Required to be well capitalized under considered prompt corrective adequately Actual action provisions capitalized (1) Ratio Amount Ratio Amount Ratio Amount Tier 1 leverage ratio: Consolidated $ 470,877 N/A N/A $ 191,559 NBH Bank 382,918 $ 237,772 190,217 Common equity tier 1 risk-based capital: Consolidated $ 470,877 N/A N/A $ 335,228 NBH Bank 382,918 $ 309,103 332,881 Tier 1 risk-based capital ratio: Consolidated $ 470,877 N/A N/A $ 309,400 NBH Bank 382,918 $ 289,022 307,086 Total risk-based capital ratio: Consolidated $ 502,917 N/A N/A $ 382,200 NBH Bank 414,958 $ 361,277 379,341 As of the fully phased-in date of January 1, 2019, including the capital conservation buffer.

Revenue from Contracts with C34

Revenue from Contracts with Clients - (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contracts with Clients
Summary of non-interest income segregated by revenue streams	For the three months ended June 30, For the six months ended June 30, 2018 2017 2018 2017 Non-interest income In-scope of Topic 606: Service Charges and other fees $ 5,008 $ 3,899 $ 10,183 $ 7,665 Bank card fees 3,672 3,134 7,034 5,938 Gain on banking center divestiture — 2,942 — 2,942 Non-interest income (in-scope of Topic 606) 8,680 9,975 17,217 16,545 Non-interest income (out-of-scope of Topic 606) 10,882 1,981 20,181 4,107 Total non-interest income $ 19,562 $ 11,956 $ 37,398 $ 20,652 Non-interest expense In-scope of Topic 606: Loss (gain) on OREO sales, net (14) (1,644) 64 (1,756) Total revenue in-scope of Topic 606 $ 8,666 $ 8,331 $ 17,281 $ 14,789

Stock-based Compensation and 35

Stock-based Compensation and Benefits - (Tables)	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of outstanding stock options	The following table summarizes stock option activity for the six months ended June 30, 2018: Weighted average Weighted remaining average contractual Aggregate exercise term in intrinsic Options price years value Outstanding at December 31, 2017 1,598,318 $ 20.62 4.07 $ 19,017 Granted 151,937 32.80 Exercised (441,161) 19.90 Forfeited (17,103) 28.57 Outstanding at June 30, 2018 1,291,991 22.20 4.39 21,181 Options exercisable at June 30, 2018 1,039,372 20.16 3.25 19,161 Options vested and expected to vest 1,259,359 21.94 4.26 20,965
Summary of Restricted Stock Activity	The following table summarizes restricted stock and performance stock unit activity during the six months ended June 30, 2018: Weighted Weighted Restricted average grant- Performance average grant- stock shares date fair value stock units date fair value Unvested at December 31, 2017 163,557 $ 22.60 125,082 $ 23.90 Granted 85,754 33.41 77,125 30.38 Vested (80,092) 22.82 — — Forfeited (13,136) 29.08 (9,884) 26.11 Unvested at June 30, 2018 156,083 $ 27.88 192,323 $ 26.39

Earnings Per Share - (Tables)

Earnings Per Share - (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Income (Loss) Per Share	The following table illustrates the computation of basic and diluted earnings per share for the three and six months ended June 30, 2018 and 2017: For the three months ended For the six months ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Net income $ 17,512 $ 9,209 $ 25,977 $ 17,467 Less: income allocated to participating securities (18) (14) (31) (30) Income allocated to common shareholders $ 17,494 $ 9,195 $ 25,946 $ 17,437 Weighted average shares outstanding for basic earnings per common share 30,735,427 26,955,187 30,615,226 26,878,904 Dilutive effect of equity awards 651,748 642,256 660,133 742,001 Dilutive effect of warrants — — — 16,627 Weighted average shares outstanding for diluted earnings per common share 31,387,175 27,597,443 31,275,359 27,637,532 Basic earnings per share $ 0.57 $ 0.34 $ 0.85 $ Diluted earnings per share $ 0.56 $ 0.33 $ 0.83 $

Derivatives - (Tables)

Derivatives - (Tables)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	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 June 30, 2018 and December 31, 2017. Information about the valuation methods used to measure fair value is provided in note 19. Asset derivatives fair value Liability derivatives fair value Balance Sheet June 30, December 31, Balance Sheet June 30, December 31, location 2018 2017 location 2018 2017 Derivatives designated as hedging instruments: Interest rate products Other assets $ 26,667 $ 10,489 Other liabilities $ 3 $ 1,167 Total derivatives designated as hedging instruments $ 26,667 $ 10,489 $ 3 $ 1,167 Derivatives not designated as hedging instruments: Interest rate products Other assets $ 4,014 $ 2,483 Other liabilities $ 3,992 $ 2,584 Interest rate lock commitments Other assets 1,466 128 Other liabilities 252 — Forward contracts Other assets 25 5 Other liabilities 538 7 Total derivatives not designated as hedging instruments $ 5,505 $ 2,616 $ 4,782 $ 2,591
Derivative Instruments, Gain (Loss)	The tables below present the effect of the Company’s derivative financial instruments on the consolidated statements of operations for the three and six months ended June 30, 2018 and 2017: Location of gain (loss) Amount of gain (loss) recognized in income on derivatives Derivatives in fair value recognized in income on For the three months ended June 30, For the six months ended June 30, hedging relationships derivatives 2018 2017 2018 2017 Interest rate products Interest and fees on loans $ 5,288 $ — $ 17,340 $ — Interest rate products Other non-interest income — (3,169) — (2,105) Total $ 5,288 $ (3,169) $ 17,340 $ (2,105) Location of gain (loss) Amount of gain (loss) recognized in income on hedged items recognized in income on For the three months ended June 30, For the six months ended June 30, Hedged items hedged items 2018 2017 2018 2017 Interest rate products Interest and fees on loans $ (5,347) $ — $ (17,264) $ — Interest rate products Other non-interest income — 2,962 — 1,720 Total $ (5,347) $ 2,962 $ (17,264) $ 1,720 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 June 30, For the six months ended June 30, as hedging instruments derivatives 2018 2017 2018 2017 Interest rate products Other non-interest expense $ 3 $ (47) $ 124 $ (79) Interest rate lock commitments Mortgage banking income (517) (122) (141) 1 Forward contracts Mortgage banking income 305 63 1,413 (131) Total $ (209) $ (106) $ 1,396 $ (209)

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Total Unfunded Commitments	Total unfunded commitments at June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Commitments to fund loans $ 231,844 $ 181,904 Unfunded commitments under lines of credit 532,778 498,857 Commercial and standby letters of credit 8,260 7,185 Total unfunded commitments $ 772,882 $ 687,946

Fair Value Measurements - (Tabl

Fair Value Measurements - (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Tables of Financial Instruments Measured At Fair Value on Recurring Basis	The tables below present the financial instruments measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017 on the consolidated statements of financial condition utilizing the hierarchy structure described above: June 30, 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 $ — $ 171,255 $ — $ 171,255 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 683,983 — 683,983 Municipal securities — 825 — 825 Loans held for sale — 113,057 — 113,057 Interest rate swap derivatives — 30,681 — 30,681 Mortgage banking derivatives — — 1,491 1,491 Total assets at fair value $ — $ 999,801 $ 1,491 $ 1,001,292 Liabilities: Interest rate swap derivatives $ — $ 3,995 $ — $ 3,995 Mortgage banking derivatives — — 790 Total liabilities at fair value $ — $ 3,995 $ 790 $ 4,785 December 31, 2017 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 $ — $ 168,648 $ — $ 168,648 Other residential MBS issued or guaranteed by U.S. Government agencies or sponsored enterprises — 685,230 — 685,230 Municipal securities — 829 — 829 Loans held for sale — 4,629 — 4,629 Interest rate swap derivatives — 12,972 — 12,972 Mortgage banking derivatives — — 133 Total assets at fair value $ — $ 872,308 $ 133 $ 872,441 Liabilities: Interest rate swap derivatives $ — $ 3,751 $ — $ 3,751 Mortgage banking derivatives — — 7 Total liabilities at fair value $ — $ 3,751 $ 7 $ 3,758
Table of Changes in Level 3 Financial Instruments	The table below details the changes in level 3 financial instruments during the six months ended June 30, 2018: Mortgage banking derivatives, net Balance at December 31, 2017 $ 126 Gain included in earnings, net 575 Balance at June 30, 2018 $
Table of assets recorded at fair value on a non-recurring basis	The table below provides information regarding the assets recorded at fair value on a non-recurring basis during the six months ended June 30, 2018 and 2017: June 30, 2018 Total Losses from fair value changes Impaired loans $ 34,822 $ 1,089 Other real estate owned 35,469 64 Mortgage servicing rights 3,915 — Total $ 74,205 $ 1,153 June 30, 2017 Total Losses from fair value changes Impaired loans $ 39,379 $ 327 Other real estate owned 14,297 46 Total $ 53,676 $ 373

Fair Value of Financial Instr40

Fair Value of Financial Instruments - (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	The fair value of financial instruments at June 30, 2018 and December 31, 2017, including methods and assumptions utilized for determining fair value of financial instruments, are set forth below: Level in fair value June 30, 2018 December 31, 2017 measurement Carrying Estimated Carrying Estimated hierarchy amount fair value amount fair value ASSETS Cash and cash equivalents Level 1 $ 137,917 $ 137,917 $ 257,364 $ 257,364 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 171,255 171,255 168,648 168,648 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises available-for-sale Level 2 683,983 683,983 685,230 685,230 Municipal securities Level 2 825 825 829 829 Municipal securities Level 3 219 219 219 219 Other available-for-sale securities Level 3 469 469 419 419 Mortgage-backed securities—residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 178,946 175,471 204,352 204,048 Mortgage-backed securities—other residential mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity Level 2 87,251 84,739 54,378 52,723 Non-marketable securities Level 2 20,070 20,070 15,030 15,030 Loans receivable Level 3 3,825,555 3,776,564 3,178,947 3,167,508 Loans held for sale Level 2 113,057 113,057 4,629 4,629 Accrued interest receivable Level 2 18,147 18,147 14,255 14,255 Interest rate swap derivatives Level 2 30,681 30,681 12,972 12,972 Mortgage banking derivatives Level 3 1,491 1,491 133 133 LIABILITIES Deposit transaction accounts Level 2 3,499,133 3,499,133 2,861,509 2,861,509 Time deposits Level 2 1,132,331 1,132,331 1,118,050 1,118,050 Securities sold under agreements to repurchase Level 2 73,441 73,441 130,463 130,463 Federal Home Loan Bank advances Level 2 188,334 188,579 129,115 130,300 Accrued interest payable Level 2 6,136 6,136 5,776 5,776 Interest rate swap derivatives Level 2 3,995 3,995 3,751 3,751 Mortgage banking derivatives Level 3 7 7

Basis of Presentation - (Detail

Basis of Presentation - (Details)	6 Months Ended
	Jun. 30, 2018item
Accounting Policies [Abstract]
Number of full service banking offices	104

Recent Accounting Pronounceme42

Recent Accounting Pronouncements - (Details) - Adjustments for New Accounting Principle, Early Adoption [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment	$ 26
Retained earnings [Member] | Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects from accumulated other comprehensive income	1,479
Retained earnings [Member] | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment	$ 26

Acquisition Activities - (Narra

Acquisition Activities - (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 01, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Acquisition related expenses		$ 400		$ 8,000
Amortization and accretion of purchase discounts and premiums				(753)	$ (1,324)
Amortization of acquired identifiable intangibles				386
Pro forma information
Total revenue		69,000	$ 70,400	134,400	132,000
Net income		$ 17,800	$ 11,600	$ 32,300	$ 21,400
Basic earnings per share (in dollars per share)		$ 0.58	$ 0.57	$ 1.05	$ 0.71
Diluted earnings per share (in dollars per share)		$ 0.38	$ 0.37	$ 1.03	$ 0.69
Peoples Inc Member
Business Acquisition [Line Items]
Cash consideration	3,398,477
Gross contractual amounts receivable	$ 713,600
Loans not expected to be collected	6,100
Mortgage repurchase reserve	$ 4,000
Amortization and accretion of purchase discounts and premiums			$ 200		$ 400
Amortization of acquired identifiable intangibles			$ 300		$ 600

Acquisition - (Summary of Net A

Acquisition - (Summary of Net Assets Acquired) (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 01, 2018	Jun. 30, 2018	Dec. 31, 2017
Consideration:
Goodwill		$ 115,027	$ 59,630
Closing price	$ 32.43
Core Deposits
Assets:
Intangible asset		48,800
Mortgage servicing rights
Assets:
Intangible asset		4,300
Peoples Inc [Member]
Assets:
Cash and due from banks	$ 105,173
Investment secruities 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 aquired	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	55,400
Peoples Inc [Member] | Core Deposits
Assets:
Intangible asset	$ 10,477
Amortization period for intangible assets	10 years
Consideration:
Goodwill		10,500
Peoples Inc [Member] | Mortgage servicing rights
Assets:
Intangible asset	$ 4,301
Consideration:
Goodwill		$ 4,300

Investment Securities - (Narrat

Investment Securities - (Narrative) (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)security	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)security
Investment securities total	$ 1,100,000		$ 1,100,000
Amortized cost	884,215		870,849
Available-for-sale securities	856,751		855,345
Held-to-maturity securities	$ 266,197		$ 258,730
Mortgage-backed securities as percentage of available-for-sale investment portfolio	100.00%		100.00%
Number of securities | security	213		87
Fair value of available-for-sale securities in an unrealized loss position	$ 781,230		$ 674,091
Fair value of available-for-sale security with OTTI		$ 300
Fair value of available-for-sale investment securities pledged as collateral	$ 313,600		$ 334,600
Gain/(loss) on sale of securities		$ 200
Estimated weighted average life of the available-for-sale mortgage-backed securities portfolio	3 years 4 months 24 days		3 years 4 months 24 days
Life of the available-for-sale mortgage-backed securities portfolio	3 years 1 month 6 days		3 years 1 month 6 days
Other securities having no contractual maturity date	$ 300
Number of held-to-maturity securities in unrealized loss positions | security	49		36
Fair value of held-to-maturity securities in an unrealized loss position	$ 258,577		$ 219,412
Held-to-maturity investment securities pledged as collateral	$ 153,000		$ 142,000
Estimated weighted average expected life of the held-to-maturity mortgage-backed securities portfolio	3 years		3 years 1 month 6 days
Life of the held-to-maturity investment portfolio	2 years 9 months 18 days		2 years 9 months 18 days
Municipal securities maturing within one to five years [Member]
Amortized cost	$ 200
Available-for-sale securities	300
Municipal securities due within five to ten years [Member]
Amortized cost	500
Available-for-sale securities	600
Other Securities [Member]
Amortized cost	469		$ 419
Available-for-sale securities	$ 469		$ 419

Investment Securities - (Summar

Investment Securities - (Summary of Available-for-Sale Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 884,215	$ 870,849
Gross unrealized gains	1,545	2,722
Gross unrealized losses	(29,009)	(18,226)
Investment securities available-for-sale (at fair value)	856,751	855,345
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	172,595	167,269
Gross unrealized gains	1,429	2,371
Gross unrealized losses	(2,769)	(992)
Investment securities available-for-sale (at fair value)	171,255	168,648
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	710,097	702,107
Gross unrealized gains	116	351
Gross unrealized losses	(26,230)	(17,228)
Investment securities available-for-sale (at fair value)	683,983	685,230
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,054	1,054
Gross unrealized losses	(10)	(6)
Investment securities available-for-sale (at fair value)	1,044	1,048
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	469	419
Investment securities available-for-sale (at fair value)	$ 469	$ 419

Investment Securities - (Summ47

Investment Securities - (Summary of Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	$ 391,427	$ 225,038
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(7,368)	(1,244)
12 months or more, Fair Value	389,803	449,053
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(21,641)	(16,982)
Total, Fair Value	781,230	674,091
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(29,009)	(18,226)
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	93,407	62,178
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,923)	(408)
12 months or more, Fair Value	28,208	36,086
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(846)	(584)
Total, Fair Value	121,615	98,264
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(2,769)	(992)
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	297,510	162,346
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(5,435)	(830)
12 months or more, Fair Value	361,595	412,967
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(20,795)	(16,398)
Total, Fair Value	659,105	575,313
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(26,230)	(17,228)
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	510	514
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(10)	(6)
Total, Fair Value	510	514
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (10)	$ (6)

Investment Securities - (Summ48

Investment Securities - (Summary of Held-to-maturity Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	$ 266,197	$ 258,730
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	2	151
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(5,989)	(2,110)
Fair value	260,210	256,771
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	178,946	204,352
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain	2	151
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(3,477)	(455)
Fair value	175,471	204,048
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	87,251	54,378
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss	(2,512)	(1,655)
Fair value	$ 84,739	$ 52,723

Investment Securities - (Summ49

Investment Securities - (Summary of Held-to-Maturity Securities, Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Fair Value, Less than 12 months	$ 202,876	$ 155,642
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,386)	(285)
Fair Value, 12 months or more	55,701	63,770
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2,603)	(1,825)
Total Fair Value	258,577	219,412
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(5,989)	(2,110)
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	158,592	149,182
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(2,972)	(220)
Fair Value, 12 months or more	15,245	17,506
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(506)	(235)
Total Fair Value	173,837	166,688
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(3,478)	(455)
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	44,284	6,460
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(414)	(65)
Fair Value, 12 months or more	40,456	46,264
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2,097)	(1,590)
Total Fair Value	84,740	52,724
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (2,511)	$ (1,655)

Loans - Narrative Section (Deta

Loans - Narrative Section (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Fees and cost related to loans	$ 9,800		$ 9,800		$ 4,300
Carrying amount of loan investments	3,825,555	$ 3,087,945	3,825,555	$ 3,087,945	3,178,947
Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,318,119		2,318,119		1,874,605
Non Accrual [Member]
Debt Instrument [Line Items]
Recorded investment, non-accrual status	25,600		25,600
Increase (decrease) in non-accrual loans			$ 4,600
Percentage increase (decrease) in past due loans			22.10%
Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	3,742,601		$ 3,742,601		3,058,324
Allowance for Loan and Lease Losses, Write-offs	335	121	1,051	331
Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,295,041		2,295,041		1,845,130
ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	82,954	$ 134,427	82,954	$ 134,427	120,623
Allowance for Loan and Lease Losses, Write-offs	61		61
ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	23,078		23,078		29,475
Total Loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	3,825,555		3,825,555		3,178,947
Total Loans [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	3,742,601		3,742,601		3,058,324
Recorded investment, non-accrual status	25,635		25,635		21,000
Total past due loans	24,288		24,288		13,557
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,680,373		1,680,373		1,376,022
Recorded investment, non-accrual status	5,545		5,545		7,767
Total past due loans	6,714		6,714		2,060
Total Loans [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	37,221		37,221		57,460
Recorded investment, non-accrual status	796		796		1,645
Total past due loans	796		796		1,645
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,295,041		2,295,041		1,845,130
Recorded investment, non-accrual status	14,928		14,928		14,893
Total past due loans	12,862		12,862		7,670
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	382,651		382,651		272,753
Recorded investment, non-accrual status	6,479		6,479		3,478
Total past due loans	4,223		4,223		2,679
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	413,209		413,209		336,098
Recorded investment, non-accrual status	597		597		605
Total past due loans	493		493		630
Total Loans [Member] | ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	82,954		82,954		120,623
Total Loans [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	23,078		23,078		29,475
Total Loans [Member] | Substandard [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	48,127		48,127		66,329
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	41,882		41,882		33,613
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	17,232		17,232		14,824
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	796		796		1,646
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	29,259		29,259		23,764
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	9,341		9,341		5,424
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,647		1,647		1,477
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	6,245		6,245		32,716
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	3,417		3,417		4,451
Total Loans [Member] | Special Mention [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	67,095		67,095		51,188
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	64,147		64,147		48,171
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	12,988		12,988		10,829
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	42,663		42,663		46,683
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	26,910		26,910		17,030
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	15,641		15,641		1,396
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,948		2,948		3,017
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,051		1,051		1,070
Total Loans [Member] | Doubtful [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,192		1,192		1,461
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,192		1,192		1,461
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	899		899		1,253
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	1,192		1,192		1,461
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	$ 75		$ 75		$ 75

Loans - Impaired Loans Narrativ

Loans - Impaired Loans Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)loanitem	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)
Debt Instrument [Line Items]
Carrying amount of loan investments	$ 3,825,555	$ 3,178,947	$ 3,087,945
Impaired loans	14,300
Recorded investment of impaired loans	$ 34,822	30,873
Number of loans resulting in increase to impaired loans | loan	8
Collective related allowance for loan losses for impaired loans	$ 1,239	1,500
Non Accrual [Member]
Debt Instrument [Line Items]
Investment in impaired loans not covered by loan loss, non-accrual status	25,600
Fair Value Of Collateral Pledged [Member]
Debt Instrument [Line Items]
Impaired loans	15,500
Discounted Cash Flows [Member]
Debt Instrument [Line Items]
Impaired loans	2,100
General Reserve [Member]
Debt Instrument [Line Items]
Impaired loans	8,800
Individual loan amount of impaired loans	250
Impaired loans acquired	8,400
Commercial Loan [Member]
Debt Instrument [Line Items]
Carrying amount of loan investments	2,318,119	$ 1,874,605
Commercial and Industrial [Member]
Debt Instrument [Line Items]
Impaired loans	$ 6,100
Number of loans resulting in increase to impaired loans | loan	3
Energy Loans [Member]
Debt Instrument [Line Items]
Impaired loans	$ 1,100
Number of loans resulting in increase to impaired loans | loan	1
Agricultural Sector [Member]
Debt Instrument [Line Items]
Impaired loans	$ 1,300
Number of loans resulting in increase to impaired loans | loan	1
Owner-Occupied [Member]
Debt Instrument [Line Items]
Impaired loans	$ 4,800
Commercial Construction [Member]
Debt Instrument [Line Items]
Impaired loans	$ 1,000
Number of loans resulting in increase to impaired loans | item	1

Loans - (Loan Portfolio Composi

Loans - (Loan Portfolio Composition Including Carrying Value by Segment of Loans Accounted for under ASC Topic 310-30) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Loans [Line Items]
Total Loans	$ 3,825,555	$ 3,178,947	$ 3,087,945
% of Total	100.00%	100.00%
Commercial Loan [Member]
Loans [Line Items]
Total Loans	$ 2,318,119	$ 1,874,605
% of Total	60.60%	59.00%
Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	$ 643,151	$ 563,049
% of Total	16.80%	17.70%
Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	$ 838,035	$ 716,237
% of Total	21.90%	22.50%
Consumer [Member]
Loans [Line Items]
Total Loans	$ 26,250	$ 25,056
% of Total	0.70%	0.80%
ASC 310-30 [Member]
Loans [Line Items]
Total Loans	$ 82,954	$ 120,623	$ 134,427
ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	23,078	29,475
ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	48,411	77,908
ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	11,365	12,759
ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	100	481
Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	3,742,601	3,058,324
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,295,041	1,845,130
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	594,740	485,141
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	826,670	703,478
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	$ 26,150	$ 24,575

Loans - (Loan Delinquency) (Det

Loans - (Loan Delinquency) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Loans [Line Items]
Total loans	$ 3,825,555	$ 3,178,947	$ 3,087,945
Commercial Loan [Member]
Loans [Line Items]
Total loans	2,318,119	1,874,605
Commercial Real Estate [Member]
Loans [Line Items]
Total loans	643,151	563,049
Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	838,035	716,237
Consumer [Member]
Loans [Line Items]
Total loans	26,250	25,056
Originated and acquired loans [Member]
Loans [Line Items]
Total loans	3,742,601	3,058,324
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total loans	2,295,041	1,845,130
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total loans	594,740	485,141
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	826,670	703,478
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total loans	26,150	24,575
ASC 310-30 [Member]
Loans [Line Items]
Total loans	82,954	120,623	$ 134,427
ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total loans	23,078	29,475
ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total loans	48,411	77,908
ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	11,365	12,759
ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total loans	100	481
Total Loans [Member]
Loans [Line Items]
Total loans	3,825,555	3,178,947
Total Loans [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total past due loans	24,288	13,557
Current	3,718,313	3,044,767
Total loans	3,742,601	3,058,324
Loans 90 days past due and still accruing	1,104	150
Non- accrual	25,635	21,000
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total past due loans	2,288	179
Current	92,169	107,502
Total loans	94,457	107,681
Non- accrual	1,080	179
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total past due loans	17	1,097
Current	23,574	13,318
Total loans	23,591	14,415
Non- accrual	824
Total Loans [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Current	63,483	26,947
Total loans	63,483	26,947
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total past due loans	6,714	2,060
Current	1,673,659	1,373,962
Total loans	1,680,373	1,376,022
Loans 90 days past due and still accruing	40	150
Non- accrual	5,545	7,767
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	4,223	2,679
Current	378,428	270,074
Total loans	382,651	272,753
Loans 90 days past due and still accruing	460
Non- accrual	6,479	3,478
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	493	630
Current	412,716	335,468
Total loans	413,209	336,098
Loans 90 days past due and still accruing	142
Non- accrual	597	605
Total Loans [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total past due loans	2,798	1,906
Current	591,942	483,235
Total loans	594,740	485,141
Loans 90 days past due and still accruing	142
Non- accrual	2,501	784
Total Loans [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total past due loans	6,936	3,448
Current	719,540	643,034
Total loans	726,476	646,482
Loans 90 days past due and still accruing	366
Non- accrual	7,372	4,724
Total Loans [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total past due loans	1,222	365
Current	98,972	56,631
Total loans	100,194	56,996
Loans 90 days past due and still accruing	16
Non- accrual	792	459
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total past due loans	12,862	7,670
Current	2,282,179	1,837,460
Total loans	2,295,041	1,845,130
Loans 90 days past due and still accruing	500	150
Non- accrual	14,928	14,893
Total Loans [Member] | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total past due loans	1,129	1,286
Current	193,667	137,609
Total loans	194,796	138,895
Non- accrual	2,108	2,003
Total Loans [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total past due loans	796	1,645
Current	36,425	55,815
Total loans	37,221	57,460
Non- accrual	796	1,645
Total Loans [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total past due loans	8,158	3,813
Current	818,512	699,665
Total loans	826,670	703,478
Loans 90 days past due and still accruing	382
Non- accrual	8,164	5,183
Total Loans [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total past due loans	470	168
Current	25,680	24,407
Total loans	26,150	24,575
Loans 90 days past due and still accruing	80
Non- accrual	42	140
Total Loans [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total loans	82,954	120,623
Total Loans [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total loans	23,078	29,475
Total Loans [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total loans	48,406	77,908
Total Loans [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total loans	11,365	12,759
Total Loans [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total loans	105	481
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Total past due loans	8,644	4,545
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total past due loans	1,208
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total past due loans		1,097
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total past due loans	1,765	554
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	1,465	696
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	19	56
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total past due loans	1,227	1,153
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total past due loans	2,733	1,167
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total past due loans	982	233
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total past due loans	3,424	1,835
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total past due loans	194	585
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total past due loans	3,715	1,400
Total Loans [Member] | 30-59 Days Past Due | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total past due loans	278	157
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Total past due loans	5,601	1,099
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total past due loans	17
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total past due loans	2,644	117
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	471
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	332
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total past due loans	349
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total past due loans	1,777	885
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total past due loans	49	91
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total past due loans	3,332	117
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total past due loans	217
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total past due loans	1,826	976
Total Loans [Member] | 60-89 Days Past Due | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total past due loans	94	6
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member]
Loans [Line Items]
Total past due loans	10,043	7,913
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total past due loans	1,080	179
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total past due loans	2,305	1,389
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	2,287	1,983
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total past due loans	142	574
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total past due loans	1,222	753
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total past due loans	2,426	1,396
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total past due loans	191	41
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total past due loans	6,106	5,718
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total past due loans	718	701
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total past due loans	796	1,645
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total past due loans	2,617	1,437
Total Loans [Member] | Greater than 90 Days Past Due | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total past due loans	98	$ 5
Non Accrual [Member]
Loans [Line Items]
Non- accrual	$ 25,600

Loans - (Credit Exposure for Lo

Loans - (Credit Exposure for Loans as Determined by Company's Internal Risk Rating System) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Loans [Line Items]
Total Loans	$ 3,825,555	$ 3,178,947	$ 3,087,945
Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,318,119	1,874,605
Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	838,035	716,237
Consumer [Member]
Loans [Line Items]
Total Loans	26,250	25,056
Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	643,151	563,049
Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	3,742,601	3,058,324
Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,295,041	1,845,130
Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	826,670	703,478
Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	26,150	24,575
Originated and acquired loans [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	594,740	485,141
ASC 310-30 [Member]
Loans [Line Items]
Total Loans	82,954	120,623	$ 134,427
ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	23,078	29,475
ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	11,365	12,759
ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	100	481
ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	48,411	77,908
Total Loans [Member]
Loans [Line Items]
Total Loans	3,825,555	3,178,947
Total Loans [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	3,742,601	3,058,324
Total Loans [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	1,680,373	1,376,022
Total Loans [Member] | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total Loans	194,796	138,895
Total Loans [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total Loans	37,221	57,460
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,295,041	1,845,130
Total Loans [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	594,740	485,141
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	94,457	107,681
Total Loans [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	23,591	14,415
Total Loans [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Total Loans	63,483	26,947
Total Loans [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	382,651	272,753
Total Loans [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	413,209	336,098
Total Loans [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	826,670	703,478
Total Loans [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	726,476	646,482
Total Loans [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	100,194	56,996
Total Loans [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	26,150	24,575
Total Loans [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	82,954	120,623
Total Loans [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	23,078	29,475
Total Loans [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	11,365	12,759
Total Loans [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	105	481
Total Loans [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	48,406	77,908
Total Loans [Member] | Pass [Member]
Loans [Line Items]
Total Loans	3,709,141	3,059,969
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	3,635,380	2,975,079
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	1,649,254	1,349,116
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total Loans	189,923	118,068
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total Loans	36,425	55,814
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	2,221,927	1,773,222
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	575,548	479,959
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	93,377	107,502
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	22,767	14,415
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Total Loans	63,483	24,817
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	346,325	250,224
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	395,921	333,225
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	811,798	697,466
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	713,175	641,294
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	98,623	56,172
Total Loans [Member] | Pass [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	26,107	24,432
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	73,761	84,890
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	18,610	23,954
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	8,860	10,072
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans		327
Total Loans [Member] | Pass [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	46,291	50,537
Total Loans [Member] | Special Mention [Member]
Loans [Line Items]
Total Loans	67,095	51,188
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	64,147	48,171
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	12,988	10,829
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total Loans	2,765	18,824
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	42,663	46,683
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	15,641	1,396
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	26,910	17,030
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	15,641	1,396
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	5,842	91
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	5,338	91
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	504
Total Loans [Member] | Special Mention [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	1	1
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	2,948	3,017
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	1,051	1,070
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	947	1,055
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans		9
Total Loans [Member] | Special Mention [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	950	883
Total Loans [Member] | Substandard [Member]
Loans [Line Items]
Total Loans	48,127	66,329
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	41,882	33,613
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	17,232	14,824
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total Loans	1,890	1,870
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Energy Loans [Member]
Loans [Line Items]
Total Loans	796	1,646
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	29,259	23,764
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Total Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	3,551	3,786
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Construction [Member]
Loans [Line Items]
Total Loans	1,080	179
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total Loans	824
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Multifamily [Member]
Loans [Line Items]
Total Loans		2,130
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	9,341	5,424
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total Loans	1,647	1,477
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	9,030	5,921
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Senior lien
Loans [Line Items]
Total Loans	7,963	5,097
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Junior lien
Loans [Line Items]
Total Loans	1,067	824
Total Loans [Member] | Substandard [Member] | Originated and acquired loans [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	42	142
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member]
Loans [Line Items]
Total Loans	6,245	32,716
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	3,417	4,451
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Residential Real Estate Segment [Member]
Loans [Line Items]
Total Loans	1,558	1,632
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Consumer [Member]
Loans [Line Items]
Total Loans	105	145
Total Loans [Member] | Substandard [Member] | ASC 310-30 [Member] | Commercial Real Estate [Member]
Loans [Line Items]
Total Loans	1,165	26,488
Total Loans [Member] | Doubtful [Member]
Loans [Line Items]
Total Loans	1,192	1,461
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member]
Loans [Line Items]
Total Loans	1,192	1,461
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total Loans	899	1,253
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Agriculture [Member]
Loans [Line Items]
Total Loans	218	133
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Commercial Loan [Member]
Loans [Line Items]
Total Loans	1,192	1,461
Total Loans [Member] | Doubtful [Member] | Originated and acquired loans [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total Loans	$ 75	$ 75

Loans - (Additional Information

Loans - (Additional Information Regarding Impaired Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Loans [Line Items]
Unpaid principal balance, Total	$ 46,428	$ 41,351
Recorded investment of impaired loans	34,822	30,873
Loans and Leases Receivable, Allowance	1,239	1,500
Commercial and Industrial [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	5,719	6,481
Recorded investment with no related allowance recorded	4,209	5,055
Unpaid principal balance of impaired loans with an allowance recorded	7,147	7,919
Recorded investment of impaired loans with an allowance recorded	4,539	5,339
Allowance for loan losses allocated with an allowance recorded	907	1,329
Agriculture [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	1,508	1,502
Recorded investment with no related allowance recorded	1,259	1,245
Unpaid principal balance of impaired loans with an allowance recorded	2,229	2,122
Recorded investment of impaired loans with an allowance recorded	2,186	2,083
Allowance for loan losses allocated with an allowance recorded	218	133
Energy Loans [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	6,642	8,661
Recorded investment with no related allowance recorded	1,923	3,861
Commercial Loan [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	20,932	20,830
Recorded investment with no related allowance recorded	14,089	14,095
Unpaid principal balance of impaired loans with an allowance recorded	10,776	10,914
Recorded investment of impaired loans with an allowance recorded	7,947	8,135
Allowance for loan losses allocated with an allowance recorded	1,205	1,466
Commercial Construction [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	1,307	215
Recorded investment with no related allowance recorded	1,082	179
Commercial Acquisition/Development [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	1,065
Recorded investment with no related allowance recorded	824
Multifamily [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded		29
Recorded investment with no related allowance recorded		29
Owner-Occupied [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	7,063	4,186
Recorded investment with no related allowance recorded	6,698	3,934
Unpaid principal balance of impaired loans with an allowance recorded	1,400	873
Recorded investment of impaired loans with an allowance recorded	1,222	713
Allowance for loan losses allocated with an allowance recorded	80	4
Non Owner-Occupied [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	648	901
Recorded investment with no related allowance recorded	569	853
Unpaid principal balance of impaired loans with an allowance recorded	347	207
Recorded investment of impaired loans with an allowance recorded	293	200
Allowance for loan losses allocated with an allowance recorded	2	1
Total Commercial Real Estate [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	3,020	1,145
Recorded investment with no related allowance recorded	2,475	1,061
Unpaid principal balance of impaired loans with an allowance recorded	347	207
Recorded investment of impaired loans with an allowance recorded	293	200
Allowance for loan losses allocated with an allowance recorded	2	1
Senior lien
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	3,075	333
Recorded investment with no related allowance recorded	2,781	309
Unpaid principal balance of impaired loans with an allowance recorded	6,509	6,481
Recorded investment of impaired loans with an allowance recorded	5,672	5,753
Allowance for loan losses allocated with an allowance recorded	25	24
Junior lien
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	414
Recorded investment with no related allowance recorded	353
Unpaid principal balance of impaired loans with an allowance recorded	1,308	1,295
Recorded investment of impaired loans with an allowance recorded	1,169	1,179
Allowance for loan losses allocated with an allowance recorded	7	8
Residential Real Estate Segment [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	3,489	333
Recorded investment with no related allowance recorded	3,134	309
Unpaid principal balance of impaired loans with an allowance recorded	7,817	7,776
Recorded investment of impaired loans with an allowance recorded	6,841	6,932
Allowance for loan losses allocated with an allowance recorded	32	32
Consumer [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	47
Recorded investment with no related allowance recorded	43
Unpaid principal balance of impaired loans with an allowance recorded		146
Recorded investment of impaired loans with an allowance recorded		141
Allowance for loan losses allocated with an allowance recorded		1
Impaired Loans With No Related Allowance Recorded [Member] [Member]
Loans [Line Items]
Unpaid principal balance with no related allowance recorded	27,488	22,308
Recorded investment with no related allowance recorded	19,741	15,465
Impaired Loans With Related Allowance Recorded [Member]
Loans [Line Items]
Unpaid principal balance of impaired loans with an allowance recorded	18,940	19,043
Recorded investment of impaired loans with an allowance recorded	15,081	15,408
Allowance for loan losses allocated with an allowance recorded	$ 1,239	$ 1,500

Loans - (Impaired Loans - Avera

Loans - (Impaired Loans - Average Recorded Investment and Interest Income Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Loans [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 36,065	$ 41,073	$ 36,815	$ 41,863
Impaired Financing Receivable, Interest Income, Cash Basis Method	158	95	317	211
Commercial and Industrial [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	5,321	6,645	5,565	7,030
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	90	25	173	73
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	4,607	4,643	4,639	4,630
Owner-Occupied [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	6,723	3,789	6,793	3,834
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	17	23	35	41
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,233	2,340	1,249	2,349
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	4	7	9	11
Agriculture [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,259	1,454	1,259	1,531
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method			6
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,142	912	2,084	914
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	1	1	2	3
Energy Loans [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,843	5,680	2,098	5,889
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	17		37
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		6,624		6,602
Commercial Loan [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	15,147	17,568	15,715	18,284
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	124	48	251	114
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	7,982	14,519	7,972	14,495
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	5	8	11	14
Commercial Construction [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,081		1,081
Commercial Acquisition/Development [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	827		856
Multifamily [Member]
Loans [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	9	31	19	31
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method				1
Non Owner-Occupied [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	574	312	591	320
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		5		12
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	297	216	308	220
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	5	2	9	5
Total Commercial Real Estate [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,481	312	2,528	320
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		5		12
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	306	247	327	251
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	5	2	9	6
Senior lien
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,818	330	2,846	334
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5,744	6,525	5,821	6,583
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	13	20	26	40
Junior lien
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	354		358
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,187	1,403	1,202	1,421
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	11	12	20	25
Residential Real Estate Segment [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	3,172	330	3,204	334
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	6,931	7,928	7,023	8,004
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	23	32	46	65
Consumer [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	14		14
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	31	169	32	175
Impaired Loans With No Related Allowance Recorded [Member] [Member]
Loans [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	20,815	18,210	21,461	18,938
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	124	53	251	126
Impaired Loans With Related Allowance Recorded [Member]
Loans [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	15,250	22,863	15,354	22,925
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	$ 33	$ 42	$ 66	$ 85

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructuring and Loans Accounted for Under ASC Topic 310-30 Narratives (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017loan	Jun. 30, 2018USD ($)loanitem	Jun. 30, 2017loan
Debt Instrument [Line Items]
Number of restructured loans | item		4
Change in Non-accruing TDRs		$ (3.3)
Troubled Debt Restructurings [Member]
Debt Instrument [Line Items]
TDR's modified within the past year that defaulted on their restructured terms	3	1	0
Recorded investment		$ 0.9
Energy Loans [Member]
Debt Instrument [Line Items]
TDR's modified within the past year that defaulted on their restructured terms | loan		1
Agriculture and Consumer loans [Member]
Debt Instrument [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 0.2

Loans - (Additional Informati58

Loans - (Additional Information Related to Accruing TDR's) (Details) - Accruing TDR [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Loans [Line Items]
Recorded investment	$ 6,940	$ 8,460
Average year-to- date recorded investment	8,222	9,261
Unpaid principal balance	7,782	9,092
Unfunded commitments to fund TDRs	3,840	2,043
Commercial [Member]
Loans [Line Items]
Recorded investment	5,509	6,595
Average year-to- date recorded investment	6,754	7,308
Unpaid principal balance	6,299	7,171
Unfunded commitments to fund TDRs	3,828	2,041
Commercial Real Estate [Member]
Loans [Line Items]
Recorded investment	266	455
Average year-to- date recorded investment	278	489
Unpaid principal balance	311	500
Residential Real Estate Segment [Member]
Loans [Line Items]
Recorded investment	1,165	1,409
Average year-to- date recorded investment	1,190	1,461
Unpaid principal balance	1,172	1,420
Unfunded commitments to fund TDRs	$ 12	2
Consumer [Member]
Loans [Line Items]
Recorded investment		1
Average year-to- date recorded investment		3
Unpaid principal balance		$ 1

Loans - (Summary of Company's C

Loans - (Summary of Company's Carrying Value of Non-Accrual TDR's) (Details) - Non-Accruing TDR [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	$ 3,962	$ 7,255
Commercial [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	2,698	5,808
Residential Real Estate Segment [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's	$ 1,264	1,336
Consumer [Member]
Loans [Line Items]
Carrying Value of Non - Accruing TDR's		$ 111

Loans - (Re-Measurement of Loan

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	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield beginning balance	$ 46,568	$ 60,476
Reclassification from non-accretable difference	8,053	7,732
Reclassification to non-accretable difference	(1,695)	(494)
Accretion	(10,224)	(12,051)
Accretable yield ending balance	$ 42,702	$ 55,663

Loans - (Composition of Net Boo

Loans - (Composition of Net Book Value for Loans Accounted for under ASC Topic 310-30) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Contractual cash flows	$ 442,000	$ 489,892
Non-accretable difference	(316,344)	(322,701)
Accretable yield	(42,702)	(46,568)
Loans accounted for under ASC 310-30	$ 82,954	$ 120,623

Allowance for Loan Losses - (Su

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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 30,686	$ 30,850	$ 31,264	$ 29,174
Provision (recoupment) for loan losses			1,914	5,820
Ending balance	32,230	34,959	32,230	34,959
Carrying amount of loan investments					$ 3,825,555	$ 3,178,947	$ 3,087,945
Loans	30,686	30,850	31,264	29,174	32,230	31,264	34,959
Total Loans					3,825,555	3,178,947	3,087,945
Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	30,574	30,630	31,193	28,949
Charge-offs	(335)	(121)	(1,051)	(331)
Recoveries	67	205	164	296
Provision (recoupment) for loan losses	1,723	4,103	1,723	5,903
Ending balance	32,029	34,817	32,029	34,817
Carrying amount of loan investments					3,742,601	3,058,324
Loans	30,574	30,630	31,193	28,949	32,029	31,193	34,817
Total Loans					3,742,601	3,058,324
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					1,239		6,244
Ending allowance balance collectively evaluated for impairment					30,790		28,573
Loans individually evaluated for impairment					34,822		39,379
Loans collectively evaluated for impairment					3,707,779		2,914,139
ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	112	220	71	225
Charge-offs	(61)		(61)
Provision (recoupment) for loan losses	150	(78)	191	(83)
Ending balance	201	142	201	142
Loans individually evaluated for impairment					201
Carrying amount of loan investments					82,954	120,623	134,427
Loans	112	220	71	225	201	71	142
Total Loans					82,954	120,623	134,427
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	21,578	20,539	21,385	18,821
Ending balance	23,582	24,656	23,582	24,656
Carrying amount of loan investments					2,318,118		1,775,454
Loans	21,578	20,539	21,385	18,821	23,582	21,385	24,656
Total Loans					2,318,118		1,775,454
Commercial Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	21,485	20,539	21,340	18,821
Charge-offs			(437)	(20)
Recoveries	13	30	55	41
Provision (recoupment) for loan losses	1,902	4,087	2,442	5,814
Ending balance	23,400	24,656	23,400	24,656
Loans	21,485	20,539	21,340	18,821	23,400	21,340	24,656
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					1,204		6,197
Ending allowance balance collectively evaluated for impairment					22,196		18,459
Loans individually evaluated for impairment					22,038		30,458
Loans collectively evaluated for impairment					2,273,002		1,709,018
Commercial Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	93		45
Charge-offs	(61)		(61)
Provision (recoupment) for loan losses	150		198
Ending balance	182		182
Loans individually evaluated for impairment					182
Carrying amount of loan investments					23,078		35,978
Loans	93		45		182	45
Total Loans					23,078		35,978
Residential Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,928	4,216	3,965	4,387
Ending balance	3,781	4,067	3,781	4,067
Carrying amount of loan investments					838,035		728,511
Loans	3,928	4,216	3,965	4,387	3,781	3,965	4,067
Total Loans					838,035		728,511
Residential Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,928	4,216	3,965	4,387
Charge-offs	(90)	(2)	(90)	(10)
Recoveries	4	110	6	113
Provision (recoupment) for loan losses	(61)	(257)	(100)	(423)
Ending balance	3,781	4,067	3,781	4,067
Loans	3,928	4,216	3,965	4,387	3,781	3,965	4,067
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					32		45
Ending allowance balance collectively evaluated for impairment					3,749		4,022
Loans individually evaluated for impairment					9,974		8,205
Loans collectively evaluated for impairment					816,696		706,294
Residential Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Carrying amount of loan investments					11,365		14,012
Total Loans					11,365		14,012
Consumer Loan [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	290	280	305	324
Ending balance	306	302	306	302
Carrying amount of loan investments					26,250		26,960
Loans	290	280	305	324	306	305	302
Total Loans					26,250		26,960
Consumer Loan [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	290	276	305	319
Charge-offs	(234)	(119)	(513)	(301)
Recoveries	50	55	103	122
Provision (recoupment) for loan losses	200	82	411	154
Ending balance	306	294	306	294
Loans	290	276	305	319	306	305	294
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 individually evaluated for impairment					1		1
Ending allowance balance collectively evaluated for impairment					305		293
Loans individually evaluated for impairment					43		165
Loans collectively evaluated for impairment					26,107		26,143
Consumer Loan [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		4		5
Provision (recoupment) for loan losses		4		3
Ending balance		8		8
Carrying amount of loan investments					100		652
Loans		4		5			8
Total Loans					100		652
Commercial Real Estate Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,890	5,815	5,609	5,642
Ending balance	4,561	5,934	4,561	5,934
Carrying amount of loan investments					643,152		557,020
Loans	4,890	5,815	5,609	5,642	4,561	5,609	5,934
Total Loans					643,152		557,020
Commercial Real Estate Portfolio Segment [Member] | Originated and acquired loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,871	5,599	5,583	5,422
Charge-offs	(11)		(11)
Recoveries		10		20
Provision (recoupment) for loan losses	(318)	191	(1,030)	358
Ending balance	4,542	5,800	4,542	5,800
Loans	4,871	5,599	5,583	5,422	4,542	5,583	5,800
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					2		1
Ending allowance balance collectively evaluated for impairment					4,540		5,799
Loans individually evaluated for impairment					2,767		551
Loans collectively evaluated for impairment					591,974		472,684
Commercial Real Estate Portfolio Segment [Member] | ASC 310-30 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	19	216	26	220
Provision (recoupment) for loan losses		(82)	(7)	(86)
Ending balance	19	134	19	134
Loans individually evaluated for impairment					19
Carrying amount of loan investments					48,411		83,785
Loans	$ 19	$ 216	$ 26	$ 220	19	$ 26	134
Total Loans					$ 48,411		$ 83,785

Allowance for Loan Losses - (Na

Allowance for Loan Losses - (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)item
Allowance For Loan And Lease Losses [Line Items]
Provision (recoupment) for loan losses			$ 1,914	$ 5,820
Impaired loans	$ 14,300		14,300
Energy Loans [Member]
Allowance For Loan And Lease Losses [Line Items]
Specific Reserve in Provision				$ 3,400
Number of Energy Specific Reserves | item				1
Impaired loans	1,100		1,100
Commercial and Industrial [Member]
Allowance For Loan And Lease Losses [Line Items]
Specific Reserve in Provision				$ 2,100
Number of Energy Specific Reserves | item				1
Impaired loans	6,100		6,100
Originated and acquired loans [Member]
Allowance For Loan And Lease Losses [Line Items]
Charge-offs, net	300	$ 100	900	$ 0
Provision (recoupment) for loan losses	1,723	4,103	1,723	5,903
ASC 310-30 [Member]
Allowance For Loan And Lease Losses [Line Items]
Provision (recoupment) for loan losses	$ 150	$ (78)	$ 191	$ (83)

Other Real Estate Owned - (Summ

Other Real Estate Owned - (Summary of Activity in OREO Balances) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Other Real Estate [Roll Forward]
Balance	$ 10,491	$ 15,662
Acquired through acquisition	1,253
Transfers from loan portfolio, at fair value	24,382	639
Impairments	(64)	(46)
Sales, net	(593)	(1,958)
Balance	$ 35,469	$ 14,297

Other Real Estate Owned - (Narr

Other Real Estate Owned - (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Loans transferred to other real estate owned at fair value			$ 24,382	$ 639
Minority interests in OREO which are held by outside banks					$ 700
Loss (gain) on OREO sales, net	$ 14	$ 1,644	(64)	$ 1,756
ASC 310-30 [Member]
Loans transferred to other real estate owned at fair value			$ 24,100

Goodwill and Intangible Asset66

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jan. 01, 2018
Goodwill and Intangible Assets
Goodwill acquired	$ 115,027		$ 115,027		$ 59,630
Goodwill Impairment	0		0		$ 0
Amortization of acquired identifiable intangibles			386
Mortgage loans serviced			419,800	$ 0
Peoples Inc [Member]
Goodwill and Intangible Assets
Goodwill acquired	55,400		55,400			$ 55,397
Core Deposits
Goodwill and Intangible Assets
Intangible assets acquired	48,800		48,800
Amortization of acquired identifiable intangibles	700	$ 1,400	$ 1,400	$ 2,700
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
Goodwill acquired	10,500		$ 10,500
Intangible assets acquired						10,477
Mortgage servicing rights
Goodwill and Intangible Assets
Intangible assets acquired	4,300		4,300
Amortization of acquired identifiable intangibles	200		400
Valuation allowance	0		$ 0
Mortgage servicing rights | Minimum
Goodwill and Intangible Assets
Discount rate (as a percent)			9.50%
Prepayment speed rate (as a percent)			8.60%
Mortgage servicing rights | Maximum
Goodwill and Intangible Assets
Discount rate (as a percent)			10.50%
Prepayment speed rate (as a percent)			11.80%
Mortgage servicing rights | Peoples Inc [Member]
Goodwill and Intangible Assets
Goodwill acquired	$ 4,300		$ 4,300
Intangible assets acquired						$ 4,301

Goodwill and Intangible Asset67

Goodwill and Intangible Assets (Carrying Amounts) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Carrying amount of intangible assets
Net carrying amount	$ 3,915
Core Deposits
Carrying amount of intangible assets
Gross carrying amount	48,834	$ 38,357
Accumulated amortization	38,056	36,750
Net carrying amount	$ 10,778	$ 1,607

Goodwill and Intangible Asset68

Goodwill and Intangible Assets (Changes in Servicing Rights) (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2018USD ($)
Changes in the mortgage servicing rights
Acquired through acquisition		$ 4,301
Amortization		(386)
Ending balance	$ 3,915	3,915
Fair value of mortgage servicing rights	4,473	4,473
Mortgage servicing rights
Changes in the mortgage servicing rights
Amortization	$ (200)	$ (400)

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 2.8		$ 2.8		$ 5.7
Amount of repurchase agreements	$ 73.4		$ 73.4		130.5
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date, Earliest	2,018		2,018
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date, Last	2,020		2,020
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	$ 966.1		$ 966.1
FHLB advances	77.3		77.3		129.1
Interest expense related to FHLB advances	$ 0.6	$ 0.5	$ 1.1	$ 0.7
Minimum
Assets Sold under Agreements to Repurchase [Line Items]
Interest rate range of FHLB advances	1.55%		1.55%
Maximum
Assets Sold under Agreements to Repurchase [Line Items]
Interest rate range of FHLB advances	2.33%		2.33%
Federal Home Loan Bank of Des Moines [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 26.1		$ 26.1		28.1
U.S. Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of collateral	$ 76.2		$ 76.2		$ 136.1

Regulatory Capital - (Capital R

Regulatory Capital - (Capital Ratio Requirements under Prompt Corrective Action or Other Regulatory Requirements) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage Ratio	9.90%	9.80%
Common equity risk-based ratio	12.60%	12.90%
Risk-based capital Ratio	12.60%	12.90%
Total risk-based capital Ratio	13.50%	13.80%
Leverage Amount	$ 546,964	$ 470,877
Common equity risk-based amount	546,964	470,877
Risk-based capital amount	546,964	470,877
Total risk-based capital Amount	$ 584,008	$ 502,917
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	$ 220,575	$ 191,559
Required to be considered adequately capitalized common equity capital amount	386,006	335,228
Required to be considered adequately capitalized risk-based capital Amount	368,452	309,400
Required to be considered adequately capitalized Total risk-based capital Amount	$ 455,147	$ 382,200
NBH Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage Ratio	9.00%	8.10%
Common equity risk-based ratio	11.40%	10.60%
Risk-based capital Ratio	11.40%	10.60%
Total risk-based capital Ratio	12.30%	11.50%
Leverage Amount	$ 493,193	$ 382,918
Common equity risk-based amount	493,193	382,918
Risk-based capital amount	493,193	382,918
Total risk-based capital Amount	$ 530,236	$ 414,958
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	$ 274,980	$ 237,772
Required to be considered well capitalized common equity capital amount	357,474	309,103
Required to be considered well capitalized risk-based capital Amount	345,168	289,022
Required to be considered well capitalized Total risk-based capital Amount	$ 431,460	$ 361,277
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	$ 219,984	$ 190,217
Required to be considered adequately capitalized common equity capital amount	384,972	332,881
Required to be considered adequately capitalized risk-based capital Amount	366,741	307,086
Required to be considered adequately capitalized Total risk-based capital Amount	$ 453,033	$ 379,341

Revenue from Contracts with C71

Revenue from Contracts with Clients - (Non-interest income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue from Contracts with Clients
Loss (gain) on OREO sales, net	$ 14	$ 1,644	$ (64)	$ 1,756
In-scope of Topic 606
Revenue from Contracts with Clients
Total Revenue	8,666	8,331	17,281	14,789
ASU 2014-09
Revenue from Contracts with Clients
Non-interest income	19,562	11,956	37,398	20,652
Contract balances	0		0		$ 0
ASU 2014-09 | In-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	8,680	9,975	17,217	16,545
Gain on banking center divestiture		2,942		2,942
Loss (gain) on OREO sales, net	(14)	(1,644)	64	(1,756)
ASU 2014-09 | In-scope of Topic 606 | Service Charges and other fees
Revenue from Contracts with Clients
Non-interest income	5,008	3,899	10,183	7,665
ASU 2014-09 | In-scope of Topic 606 | Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,672	3,134	7,034	5,938
ASU 2014-09 | Out-of-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	$ 10,882	$ 1,981	$ 20,181	$ 4,107

Stock-based Compensation and Em

Stock-based Compensation and Employee Benefits - (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 200,000	$ 200,000	$ 400,000	$ 400,000
Unrecognized compensation expense	1,000,000		$ 1,000,000
Unrecognized compensation cost, weighted-average period, years			2 years 6 months
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			85,754
Weighted average grant-date fair value, Granted (in dollars per share)			$ 33.41
Stock based compensation expense	600,000	600,000	$ 1,000,000	1,200,000
Restricted Stock [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	3,000,000		$ 3,000,000
Unrecognized compensation cost, weighted-average period, years			2 years 3 months 18 days
Market-based stock awards | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			26,594
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period			5 years
Weighted average grant-date fair value, Granted (in dollars per share)			$ 11.28
Unrecognized compensation expense	100,000		$ 100,000
Unrecognized compensation cost, weighted-average period, years			8 months 12 days
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			77,125
Weighted average grant-date fair value, Granted (in dollars per share)			$ 30.38
Stock based compensation expense	400,000	$ 200,000	$ 700,000	$ 400,000
Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			77,125	49,758
Unrecognized compensation expense	$ 3,300,000		$ 3,300,000
Unrecognized compensation cost, weighted-average period, years			2 years 2 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%
Weighted average grant-date fair value, Granted (in dollars per share)			$ 32.65
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%
Weighted average grant-date fair value, Granted (in dollars per share)			$ 27.51
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	400,000		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 under the ESPP (in shares)			5,960	5,373
Shares available for issuance	349,199		349,199
Minimum | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Share Based Compensation Arrangement By Share Based Payment Award Options Granted Contractual Term			7 years
Minimum | Restricted Stock [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Minimum | Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial target awards			0.00%
Maximum | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Share Based Compensation Arrangement By Share Based Payment Award Options Granted Contractual Term			10 years
Maximum | Restricted Stock [Member] | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Maximum | Performance stock units | NBH Holdings Corp. 2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial target awards			150.00%

Stock-based Compensation and 73

Stock-based Compensation and Benefits - (Summary of Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Options, beginning	1,598,318
Granted, Options	151,937
Forfeited, Options	(17,103)
Exercised, Options	(441,161)
Outstanding Options, ending	1,291,991	1,598,318
Options fully vested and exercisable at end of period, Options	1,039,372
Options expected to vest, Options	1,259,359
Outstanding, Weighted average exercise price, beginning	$ 20.62
Granted, Weighted average exercise price	32.80
Forfeited, Weighted average exercise price	28.57
Exercised, Weighted average exercise price	19.90
Outstanding, Weighted average exercised price, ending	22.20	$ 20.62
Options fully vested and exercisable at end of period, Weighted average exercise price	20.16
Options expected to vest, Weighted average exercise price	$ 21.94
Outstanding, Weighted average remaining contractual term in years	4 years 4 months 21 days	4 years 26 days
Options fully vested and exercisable at end of period, weighted average remaining contractual term in years	3 years 3 months
Options expected to vest, Weighted average remaining contractual term in years	4 years 3 months 4 days
Outstanding, Aggregate intrinsic value, beginning	$ 19,017
Outstanding, Outstanding, Aggregate intrinsic value, beginning	21,181	$ 19,017
Aggregate intrinsic Value of Options fully vested and exercisable at end of period	19,161
Options expected to vest, Aggregate Intrinsic Value	$ 20,965

Stock-based Compensation and 74

Stock-based Compensation and Benefits - (Summary of Restricted Stock Activity) (Details)	6 Months Ended
	Jun. 30, 2018$ / 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	163,557
Unvested Restricted shares, Vested (in shares) | shares	(80,092)
Unvested Restricted shares, Granted (in shares) | shares	85,754
Unvested Restricted shares, Forfeited (in shares) | shares	(13,136)
Unvested Restricted shares, Ending (in shares) | shares	156,083
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	$ 22.60
Weighted average grant-date fair value, Vested (in dollars per share) | $ / shares	22.82
Weighted average grant-date fair value, Granted (in dollars per share) | $ / shares	33.41
Weighted average grant-date fair value, Forfeited (in dollars per share) | $ / shares	29.08
Weighted average grant-date fair value, Ending (in dollars per share) | $ / shares	$ 27.88
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	125,082
Unvested Restricted shares, Granted (in shares) | shares	77,125
Unvested Restricted shares, Forfeited (in shares) | shares	(9,884)
Unvested Restricted shares, Ending (in shares) | shares	192,323
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	$ 23.90
Weighted average grant-date fair value, Granted (in dollars per share) | $ / shares	30.38
Weighted average grant-date fair value, Forfeited (in dollars per share) | $ / shares	26.11
Weighted average grant-date fair value, Ending (in dollars per share) | $ / shares	$ 26.39

Warrants (Narrative) (Details)

Warrants (Narrative) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017
Warrants and Rights Note Disclosure [Abstract]
Warrants granted, exercise price per share	$ 20	$ 20	$ 20
Warrants settled or exercised	250,750

Common Stock - (Narrative) (Det

Common Stock - (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Aug. 05, 2016
Schedule Of Common Stock [Line Items]
Remaining authorized amount	$ 12.6
Shares outstanding	30,726,789	26,875,585
Common Class A [Member]
Schedule Of Common Stock [Line Items]
Shares outstanding	30,726,789	26,875,585
Restricted issued but not yet vested, shares	156,083	163,557
New Board Authorized Share Repurchase Program
Schedule Of Common Stock [Line Items]
Stock repurchase program, authorized amount			$ 50

Earnings Per Share - (Narrative

Earnings Per Share - (Narrative) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Mar. 31, 2017
Shares outstanding	30,726,789	26,788,833
Outstanding stock options to purchase common stock	1,291,991	1,683,867	1,598,318
Outstanding stock options to purchase common stock, per share	$ 22.20	$ 20.61	$ 20.62
Warrants granted, exercise price per share	$ 20		$ 20	$ 20
Restricted shares outstanding	348,406	256,064
Warrant [Member]
Dilutive Convertible Securities		16,627

Earnings Per Share - (Schedule

Earnings Per Share - (Schedule of Computation of Basic and Diluted Income Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 17,512	$ 9,209	$ 25,977	$ 17,467
Less: income allocated to participating securities	(18)	(14)	(31)	(30)
Income available to common stockholders (numerator)	$ 17,494	$ 9,195	$ 25,946	$ 17,437
Weighted average common shares outstanding (denominator)	30,735,427	26,955,187	30,615,226	26,878,904
Weighted average shares outstanding for diluted earnings per common share	31,387,175	27,597,443	31,275,359	27,637,532
Earnings per share-basic (in dollars per share)	$ 0.57	$ 0.34	$ 0.85	$ 0.65
Earnings per share-diluted (in dollars per share)	$ 0.56	$ 0.33	$ 0.83	$ 0.63
Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive Convertible Securities	651,748	642,256	660,133	742,001
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive Convertible Securities				16,627

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income tax rate	13.80%	19.10%	14.80%	5.10%
Effective Income Tax Rate After Stock Compensation Activity	$ 17.7		$ 18.6
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 800,000	$ 500,000	$ 1,200,000	$ 3,400,000

Derivatives - (FV of Derivative

Derivatives - (FV of Derivatives on the Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	$ 26,667	$ 10,489
Liability derivatives fair value	3	1,167
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	5,505	2,616
Liability derivatives fair value	4,782	2,591
Other assets [Member] | Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	26,667	10,489
Liability derivatives fair value	3	1,167
Other assets [Member] | Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	4,014	2,483
Liability derivatives fair value	3,992	2,584
Other assets [Member] | Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	1,466	128
Liability derivatives fair value	252
Other assets [Member] | Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Asset derivatives fair value	25	5
Liability derivatives fair value	$ 538	$ 7

Derivatives - (Narrative) (Deta

Derivatives - (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional amount	$ 178.7
Termination value of derivatives in net liability position	4
Collateral Already Posted, Aggregate Fair Value	0.2
Hedged Loans	506.5
Cumulative fair value hedge adjusmtnet	(27)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Notional amount		$ 8
Interest Rate Lock Commitments Notional Amount Member
Derivative [Line Items]
Notional amount	113.5
Forward Contract Notional [Member]
Derivative [Line Items]
Notional amount		9
Designated as Hedging Instrument [Member] | Interest rate swap derivatives [Member]
Derivative [Line Items]
Notional amount	468.1	417.7
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest rate swap derivatives [Member]
Derivative [Line Items]
Notional amount	$ 174	$ 202.2

Derivatives - (Derivatives on t

Derivatives - (Derivatives on the Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	$ (209)	$ (106)	$ 1,396	$ (209)
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	5,288	(3,169)	17,340	(2,105)
Amount of gain or (loss) recognized in income on hedged items	(5,347)	2,962	(17,264)	1,720
Interest rate products [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	3	(47)	124	(79)
Interest rate products [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	5,288		17,340
Amount of gain or (loss) recognized in income on hedged items	(5,347)		(17,264)
Interest rate products [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives		(3,169)		(2,105)
Amount of gain or (loss) recognized in income on hedged items		2,962		1,720
Forward Contracts [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	305	63	1,413	(131)
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	$ (517)	$ (122)	$ (141)	$ 1

Commitments and Contingencies83

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Commitment And Contingencies [Line Items]
Loan commitments	$ 764.6	$ 680.8
Mortgage Repurchase Reserve	4
Standby Letters of Credit [Member]
Commitment And Contingencies [Line Items]
Standby letters of credit	$ 8.3	$ 7.2

Commitments and Contingencies84

Commitments and Contingencies (Schedule of Total Unfunded Commitments) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Commitment And Contingencies [Line Items]
Total unfunded commitments	$ 772,882	$ 687,946
Commitments to fund loans [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	231,844	181,904
Unfunded Commitment Line Of Credit [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	532,778	498,857
Commercial And Standby Letters Of Credit [Member]
Commitment And Contingencies [Line Items]
Total unfunded commitments	$ 8,260	$ 7,185

Fair Value Measurements - (Ta85

Fair Value Measurements - (Tables of Financial Instruments Measured At Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 1,001,292	$ 872,441
Total liabilities at fair value	4,785	3,758
Loans held for sale member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	113,057	4,629
Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	825	829
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	171,255	168,648
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	683,983	685,230
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	999,801	872,308
Total liabilities at fair value	3,995	3,751
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	113,057	4,629
Level 2 [Member] | Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	825	829
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	171,255	168,648
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	683,983	685,230
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	1,491	133
Total liabilities at fair value	790	7
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	30,681	12,972
Total liabilities at fair value	3,995	3,751
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	30,681	12,972
Total liabilities at fair value	3,995	3,751
Mortgage banking derivatives | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	1,491	133
Total liabilities at fair value	790	7
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	1,491	133
Total liabilities at fair value	$ 790	$ 7

Fair Value Measurements - (Ta86

Fair Value Measurements - (Table of Changes in Level 3 Financial Instruments) (Details) - Derivative Financial Instruments Assets and Liabilities [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 126
Realized gain (loss) included in earnings—net mortgage banking derivatives	575
Ending Balance	$ 701

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)loan	Jun. 30, 2017USD ($)loan	Dec. 31, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 3,825,555	$ 3,087,945	$ 3,178,947
Impairment on other real estate owned	$ 64	$ 46
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of Loans measured | loan	6	7
Loans	$ 6,300	$ 14,500
Nonrecurring Loans Reserves	$ 1,200	$ 6,200

Fair Value Measurements - (Inpu

Fair Value Measurements - (Inputs Used to Determine Fair Values of Oreo are Considered Level 3 Inputs in Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets on a non-recurring basis	$ 74,205	$ 53,676
Losses From Fair Value Changes	1,153	373
Impaired loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets on a non-recurring basis	34,822	39,379
Losses From Fair Value Changes	1,089	327
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets on a non-recurring basis	35,469	14,297
Losses From Fair Value Changes	64	$ 46
Mortgage servicing rights member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets on a non-recurring basis	$ 3,915

Fair Value Measurements - (Ta89

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) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets at fair value	$ 1,001,292,000	$ 872,441,000
Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Prepayment speed	$ 8.6
Minimum | Impaired loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Appraised values Discount rate	0.00%
Minimum | Mortgage servicing rights member
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Appraised values Discount rate	9.50%
Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Prepayment speed	$ 11.8
Maximum | Impaired loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Appraised values Discount rate	25.00%
Maximum | Mortgage servicing rights member
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Appraised values Discount rate	10.50%

Fair Value of Financial Instr90

Fair Value of Financial Instruments - (Schedule of Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS:
Cash and cash equivalents	$ 137,917	$ 257,364
Investment securities available-for-sale (at fair value)	856,751	855,345
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	266,197	258,730
Non-marketable securities	20,070	15,030
Loans held-for-sale	113,057	4,629
LIABILITIES:
Time deposits	1,132,331	1,118,050
Securities sold under agreements to repurchase	73,441	130,463
Federal Home Loan Bank advances	188,334	129,115
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)	171,255	168,648
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	178,946	204,352
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	683,983	685,230
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	87,251	54,378
Other Securities [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	469	419
Municipal [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	1,044	1,048
Carrying Amount [Member] | Level 1 [Member]
ASSETS:
Cash and cash equivalents	137,917	257,364
Carrying Amount [Member] | Level 2 [Member]
ASSETS:
Non-marketable securities	20,070	15,030
Loans held-for-sale	113,057	4,629
Accrued interest receivable	18,147	14,255
LIABILITIES:
Deposit transaction accounts	3,499,133	2,861,509
Time deposits	1,132,331	1,118,050
Securities sold under agreements to repurchase	73,441	130,463
Federal Home Loan Bank advances	188,334	129,115
Accrued interest payable	6,136	5,776
Carrying Amount [Member] | Level 3 [Member]
ASSETS:
Loans receivable, net	3,825,555	3,178,947
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)	171,255	168,648
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	178,946	204,352
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)	683,983	685,230
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	87,251	54,378
Carrying Amount [Member] | Other Securities [Member] | Level 3 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	469	419
Carrying Amount [Member] | Municipal [Member] | Level 2 [Member]
ASSETS:
Municipal obligations	825	829
Carrying Amount [Member] | Municipal [Member] | Level 3 [Member]
ASSETS:
Municipal obligations	219	219
Estimated Fair Value [Member] | Level 1 [Member]
ASSETS:
Cash and cash equivalents	137,917	257,364
Estimated Fair Value [Member] | Level 2 [Member]
ASSETS:
Non-marketable securities	20,070	15,030
Loans held-for-sale	113,057	4,629
Accrued interest receivable	18,147	14,255
LIABILITIES:
Deposit transaction accounts	3,499,133	2,861,509
Time deposits	1,132,331	1,118,050
Securities sold under agreements to repurchase	73,441	130,463
Federal Home Loan Bank advances	188,579	130,300
Accrued interest payable	6,136	5,776
Estimated Fair Value [Member] | Level 3 [Member]
ASSETS:
Loans receivable, net	3,776,564	3,167,508
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)	171,255	168,648
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	175,471	204,048
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)	683,983	685,230
Mortgage-backed securities-residential mortgage pass-through securities issued or guaranteed by U.S. Government agencies or sponsored enterprises held-to-maturity	84,739	52,723
Estimated Fair Value [Member] | Other Securities [Member] | Level 3 [Member]
ASSETS:
Investment securities available-for-sale (at fair value)	469	419
Estimated Fair Value [Member] | Municipal [Member] | Level 2 [Member]
ASSETS:
Municipal obligations	825	829
Estimated Fair Value [Member] | Municipal [Member] | Level 3 [Member]
ASSETS:
Municipal obligations	219	219
Interest rate swap derivatives [Member] | Carrying Amount [Member] | Level 2 [Member]
ASSETS:
Derivative asset	30,681	12,972
LIABILITIES:
Derivative liability	3,995	3,751
Interest rate swap derivatives [Member] | Estimated Fair Value [Member] | Level 2 [Member]
ASSETS:
Derivative asset	30,681	12,972
LIABILITIES:
Derivative liability	3,995	3,751
Mortgage banking derivatives | Carrying Amount [Member] | Level 3 [Member]
ASSETS:
Derivative asset	1,491	133
LIABILITIES:
Derivative liability	790	7
Mortgage banking derivatives | Estimated Fair Value [Member] | Level 3 [Member]
ASSETS:
Derivative asset	1,491	133
LIABILITIES:
Derivative liability	$ 790	$ 7