Byline Bancorp (BY) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 10, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	BY
Entity Registrant Name	Byline Bancorp, Inc.
Entity Central Index Key	1,702,750
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		29,460,991

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 17,396	$ 19,404
Interest bearing deposits with other banks	110,645	38,945
Cash and cash equivalents	128,041	58,349
Securities available-for-sale, at fair value	626,057	583,236
Securities held-to-maturity, at amortized cost (fair value March 31, 2018—$110,419, December 31, 2017—$117,277)	112,266	117,163
Restricted stock, at cost	17,177	16,343
Loans held for sale	8,219	5,212
Loans and leases:
Loans and leases	2,280,418	2,277,492
Allowance for loan and lease losses	(17,640)	(16,706)
Net loans and leases	2,262,778	2,260,786
Servicing assets, at fair value	21,615	21,400
Accrued interest receivable	6,971	7,670
Premises and equipment, net	94,014	95,224
Assets held for sale	9,030	9,779
Other real estate owned, net	10,466	10,626
Goodwill	54,562	54,562
Other intangible assets, net	15,991	16,756
Bank-owned life insurance	5,838	5,718
Deferred tax assets, net	47,371	47,376
Due from counterparty	19,987	39,824
Other assets	21,989	16,106
Total assets	3,462,372	3,366,130
LIABILITIES
Non-interest bearing demand deposits	749,892	760,887
Interest bearing deposits:
NOW, savings accounts, and money market accounts	1,018,361	973,685
Time deposits	756,294	708,757
Total deposits	2,524,547	2,443,329
Accrued interest payable	1,612	1,306
Federal Home Loan Bank advances	380,000	361,506
Securities sold under agreements to repurchase	27,815	31,187
Junior subordinated debentures issued to capital trusts, net	27,800	27,647
Accrued expenses and other liabilities	37,662	42,577
Total liabilities	2,999,436	2,907,552
STOCKHOLDERS’ EQUITY
Preferred stock	10,438	10,438
Common stock, voting $0.01 par value at March 31, 2018 and December 31, 2017; 150,000,000 shares authorized at March 31, 2018 and December 31, 2017; 29,404,048 shares issued and outstanding at March 31, 2018 and 29,317,298 issued and outstanding at December 31, 2017	293	292
Additional paid-in capital	392,932	391,586
Retained earnings	68,687	61,349
Accumulated other comprehensive loss, net of tax	(9,414)	(5,087)
Total stockholders’ equity	462,936	458,578
Total liabilities and stockholders’ equity	$ 3,462,372	$ 3,366,130

CONSOLIDATED STATEMENTS OF FIN3

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Securities held-to-maturity, fair value	$ 110,419	$ 117,277
Common stock, voting par value	$ 0.01	$ 0.01
Common stock, voting shares authorized	150,000,000	150,000,000
Common stock, voting shares issued	29,404,048	29,317,298
Common stock, voting shares outstanding	29,404,048	29,317,298

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
INTEREST AND DIVIDEND INCOME
Interest and fees on loans and leases	$ 33,654,000	$ 28,396,000
Interest on taxable securities	4,055,000	3,790,000
Interest on tax-exempt securities	174,000	133,000
Other interest and dividend income	259,000	169,000
Total interest and dividend income	38,142,000	32,488,000
INTEREST EXPENSE
Deposits	2,498,000	1,483,000
Federal Home Loan Bank advances	1,358,000	660,000
Subordinated debentures and other borrowings	591,000	807,000
Total interest expense	4,447,000	2,950,000
Net interest income	33,695,000	29,538,000
PROVISION FOR LOAN AND LEASE LOSSES	5,115,000	1,891,000
Net interest income after provision for loan and lease losses	28,580,000	27,647,000
NON-INTEREST INCOME
Fees and service charges on deposits	1,312,000	1,219,000
Net servicing fees	563,000	919,000
ATM and interchange fees	1,218,000	1,348,000
Net gains on sales of securities available-for-sale		8,000
Net gains on sales of loans	7,476,000	8,082,000
Other non-interest income	859,000	732,000
Total non-interest income	11,428,000	12,308,000
NON-INTEREST EXPENSE
Salaries and employee benefits	18,278,000	16,602,000
Occupancy expense, net	3,755,000	3,739,000
Equipment expense	603,000	563,000
Loan and lease related expenses	1,400,000	877,000
Legal, audit and other professional fees	1,851,000	1,671,000
Data processing	2,301,000	2,409,000
Net gain recognized on other real estate owned and other related expenses	(1,000)	(570,000)
Regulatory assessments	241,000	184,000
Other intangible assets amortization expense	767,000	769,000
Advertising and promotions	249,000	289,000
Telecommunications	418,000	418,000
Other non-interest expense	2,057,000	1,900,000
Total non-interest expense	31,919,000	28,851,000
INCOME BEFORE PROVISION FOR INCOME TAXES	8,089,000	11,104,000
PROVISION FOR INCOME TAXES	1,321,000	4,544,000
NET INCOME	6,768,000	6,560,000
Dividends on preferred shares	193,000	189,000
INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 6,575,000	$ 6,371,000
EARNINGS PER COMMON SHARE
Basic	$ 0.22	$ 0.26
Diluted	$ 0.22	$ 0.25

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 6,768	$ 6,560
Securities available-for-sale
Unrealized holding (losses) gains arising during the period	(8,852)	1,020
Reclassification adjustments for net gains included in net income		(8)
Tax effect	2,395	(626)
Net of tax	(6,457)	386
Cash flow hedges
Unrealized holding gains arising during the period	4,070	(83)
Reclassification adjustments for (losses) gains included in net income	(61)	54
Tax effect	(1,116)	11
Net of tax	2,893	(18)
Total other comprehensive income (loss)	(3,564)	368
Comprehensive income	$ 3,204	$ 6,928

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2016	$ 382,658	$ 25,441		$ 313,552	$ 50,933	$ (7,268)
Beginning balance, shares at Dec. 31, 2016		25,441	24,616,706
Net income	6,560				6,560
Other comprehensive income (loss), net of tax	368					368
Cash dividends declared on preferred stock	(189)				(189)
Share-based compensation expense	286			286
Ending balance at Mar. 31, 2017	389,683	$ 25,441		313,838	57,304	(6,900)
Ending balance, shares at Mar. 31, 2017		25,441	24,616,706
Beginning balance at Dec. 31, 2016	382,658	$ 25,441		313,552	50,933	(7,268)
Beginning balance, shares at Dec. 31, 2016		25,441	24,616,706
Ending balance at Dec. 31, 2017	458,578	$ 10,438	$ 292	391,586	61,349	(5,087)
Ending balance, shares at Dec. 31, 2017		10,438	29,317,298
Net income	6,768				6,768
Other comprehensive income (loss), net of tax	(3,564)					(3,564)
Issuance of common stock upon exercise of stock options	1,005		$ 1	1,004
Issuance of common stock upon exercise of stock options, shares			86,750
Reclassification of certain income tax effects from accumulated other comprehensive income	(763)				763	(763)
Cash dividends declared on preferred stock	(193)				(193)
Share-based compensation expense	342			342
Ending balance at Mar. 31, 2018	$ 462,936	$ 10,438	$ 293	$ 392,932	$ 68,687	$ (9,414)
Ending balance, shares at Mar. 31, 2018		10,438	29,404,048

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 6,768	$ 6,560
Adjustments to reconcile net income to net cash from operating activities:
PROVISION FOR LOAN AND LEASE LOSSES	5,115	1,891
Depreciation and amortization of premises and equipment	1,273	1,298
Net amortization of securities	1,009	1,184
Net gains on sales of securities available-for-sale		(8)
Net gains on sales of assets held for sale	(189)	(162)
Net gains on sales of loans	(7,476)	(8,082)
Originations of government guaranteed loans	(82,125)	(61,918)
Proceeds from government guaranteed loans sold	104,604	70,410
Accretion of premiums and discounts on acquired loans, net	(7,258)	(7,955)
Net change in servicing assets	(215)	(132)
Net valuation adjustments on other real estate owned	81	276
Net gains on sales of other real estate owned	(64)	(1,228)
Other intangible assets amortization expense	767	769
Amortization of time deposit premium	(5)	(463)
Amortization of Federal Home Loan Bank advances premium	(19)	(52)
Accretion of junior subordinated debentures discount	153	204
Share-based compensation expense	342	286
Deferred tax provision	1,284	4,220
Increase in cash surrender value of bank owned life insurance	(120)	(119)
Changes in assets and liabilities:
Accrued interest receivable	673	(666)
Other assets	622	739
Accrued interest payable	306	(534)
Accrued expenses and other liabilities	4,944	(1,418)
Net cash provided by operating activities	30,470	5,100
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of securities available-for-sale	(72,646)	(745)
Proceeds from maturities and calls of securities available-for-sale	5,430	1,182
Proceeds from paydowns of securities available-for-sale	14,691	17,718
Proceeds from sales of securities available-for-sale		8
Proceeds from paydowns of securities held-to-maturity	4,050	5,337
Purchases of Federal Home Loan Bank stock	(6,282)	(2,610)
Federal Home Loan Bank stock repurchases	5,448	8,100
Proceeds from other loans sold		9,984
Net change in loans and leases	(10,723)	(9,412)
Purchases of premises and equipment	(63)	(797)
Proceeds from sales of assets held for sale	954	2,752
Proceeds from sales of other real estate owned	1,187	5,157
Net cash (used in) provided by investing activities	(57,954)	36,674
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	81,223	85,908
Proceeds from Federal Home Loan Bank advances	1,589,900	825,000
Repayments of Federal Home Loan Bank advances	(1,571,387)	(929,000)
Repayments of line of credit		(2,500)
Net (decrease) increase in securities sold under agreements to repurchase	(3,372)	14,691
Dividends paid on preferred stock	(193)	(189)
Proceeds from issuance of common stock upon exercise of stock options	1,005
Proceeds from issuance of preferred stock		1,050
Net cash provided by (used in) financing activities	97,176	(5,040)
NET INCREASE IN CASH AND CASH EQUIVALENTS	69,692	36,734
CASH AND CASH EQUIVALENTS, beginning of period	58,349	46,533
CASH AND CASH EQUIVALENTS, end of period	128,041	83,267
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	4,012	3,795
Cash payments during the period for taxes	63	832
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in fair value of available-for-sale securities, net of tax	(6,457)	386
Change in fair value of cash flow hedges, net of tax	2,893	(18)
Delayed payments of mortgage-backed securities	726	372
Change in due to broker	9,838	(9,978)
Transfers of loans to loans held for sale		10,061
Transfers of loans to other real estate owned	1,044	808
Transfers of land and premises to assets held for sale		1,508
Transfers of premises and equipment to other assets		$ 502
Transfers of other assets to assets held for sale	$ 16

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Note 1—Basis of Presentation These unaudited interim condensed consolidated financial statements include the accounts of Byline Illinois state chartered These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). In preparing these financial statements, the Company has evaluated events and transactions subsequent to March 31, 2018 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information in footnote disclosures normally included in financial statements prepared in accordance with GAAP has been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Consolidated Financial Statements for the years ended December 31, 2017, 2016, and 2015. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s management has evaluated subsequent events for potential recognition or disclosure through the date of the issuance of these consolidated financial statements. No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements. Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity. During the three months ended March 31, 2018, we revised our previously issued 2017 consolidated financial statements to properly record a deferred tax liability associated with the bad debt recapture assumed from the acquisition of Ridgestone Financial Services, Inc. (“Ridgestone”) and its subsidiaries on October 14, 2016. The acquisition of Ridgestone was accounted for using the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair value adjustments associated with this transaction were finalized during the fourth quarter of 2017. We evaluated the effect of the error to our previously issued consolidated financial statements in accordance with Securities and Exchange Commission Staff Accounting Bulletin No. 99 and No. 108, and, based upon quantitative and qualitative factors, determined that the error was not material to our previously issued consolidated financial statements. Accordingly, we have reflected the change in 2017 and revised our Consolidated Statements of Financial Condition disclosed herein. Consolidated financial statements for periods not presented herein will be revised, as applicable, as they are included in future filings. All financial information presented in the accompanying notes to these consolidated financial statements was revised to reflect the change. The change did not affect net income or stockholders’ equity for the periods impacted. The following table presents the effect of the aforementioned revisions to our Consolidated Statements of Financial Condition as of December 31, 2017: December 31, 2017 (dollars in thousands) As Reported Adjustment As Revised Goodwill $ 51,975 $ 2,587 $ 54,562 Deferred tax assets, net 49,963 (2,587 ) 47,376 Total assets 3,366,130 — 3,366,130

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Pronouncements	Note 2—Recently Issued Accounting Pronouncements The following reflect recent accounting pronouncements that have been adopted or are pending adoption by the Company. As the Company qualifies as an emerging growth company and has elected the extended transition period for complying with new or revised accounting pronouncements, it is not subject to new or revised accounting standards applicable to public companies during the extended transition period. The accounting pronouncements pending adoption below reflect effective dates for the Company as an emerging growth company with the extended transition period. Revenue from Contracts with Customers In May 2014, FASB issued Accounting Standards Update (“ASU”) No. 2014-09, deferred by ASU No. 2015-14 and clarifying standards, Revenue from Contracts with Customers , which creates Topics 606 and 610 and supersedes Topic 605, Revenue Recognition . The core principle of Topic 606 is that an entity recognizes 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. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. Under the terms of ASU No. 2015-14 the standard is effective for interim and annual periods beginning after December 15, 2017. Early application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company is currently evaluating the provisions of ASU No. 2014-09 to determine the potential impact the standard will have on the Company’s Consolidated Financial Statements. As a financial institution, the Company’s largest component of revenue, interest income, is excluded from the scope of this ASU. The Company is currently evaluating which, if any, of its sources of non-interest income will be impacted by this ASU. Assuming the Company remains an emerging growth company, the Company expects to adopt this new guidance on January 1, 2019, with a cumulative effect adjustment to opening retained earnings, if such adjustment is deemed to be significant. In April 2016, FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing . The amendments in this ASU do not change the core principle of the guidance in Topic 606. Rather, the amendments in this ASU clarify the following two aspects of Topic 606: (1) identifying performance obligations and (2) licensing implementation guidance, while retaining the related principles for those areas. The amendments in this ASU affect the guidance in ASU 2014-09, discussed above, which is not yet effective. The effective date and transition requirements for the amendments in this ASU are the same as the effective date and transition requirements in Topic 606, Revenues from Contracts with Customers . The Company is evaluating the provisions of this ASU in conjunction with ASU No. 2014-09 to determine the potential impact Topic 606 and its amendments will have on the Company’s Consolidated Financial Statements. In May 2016, FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients Revenue from Contracts with Customers In November 2017, FASB issued ASU No. 2017-14, amending ASC Topic 606, Revenue from Contracts with Customers Revenue from Contracts with Customers Recognition and Measurement of Financial Assets and Financial Liabilities Recognition and Measurement of Financial Assets and Financial Liabilities In March 2018, FASB issued ASU No. 2018-03, Recognition and Measurement of Financial Assets and Financial Liabilities Leases (Topic 842) In February 2016, FASB issued ASU No. 2016-02, Leases . The amendments in this ASU require lessees to recognize the following for all leases (with the exception of short-term) at the commencement date; a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The amendments in this ASU leave lessor accounting largely unchanged, although certain targeted improvements were made to align lessor accounting with the lessee accounting model. This ASU simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company expects an increase in assets and liabilities as a result of recognizing additional lease contracts where the Company is a lessee. Derivatives and Hedging (Topic 815) In August 2017, FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities . The amendments in this ASU better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The new authoritative guidance will be effective for reporting periods after January 1, 2019 with early adoption permitted. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Compensation—Stock Compensation (Topic 718) In March 2016, FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting . FASB issued this ASU as part of its Simplification Initiative. The areas for simplification in this ASU involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Amendments in this ASU relate to the timing of when excess tax benefits are recognized, minimum statutory withholding requirements, forfeitures, and intrinsic value should be applied using a modified retrospective transition method by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is adopted. Amendments related to the presentation of employee taxes paid on the statement of cash flows when an employer withholds shares to meet the minimum statutory withholding requirement should be applied retrospectively. Amendments in this ASU require recognition of excess tax benefits and tax deficiencies in the income statement and the practical expedient for estimating expected term should be applied prospectively. An entity may elect to apply the amendments in this ASU related to the presentation of excess tax benefits on the statement of cash flows using either a prospective transition method or a retrospective transition method. The amendments in this ASU are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. This ASU became effective for the Company on January 1, 2017 and did not have a material impact on the Company’s Consolidated Financial Statements. In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting Financial Instruments—Credit Losses (Topic 326) In June 2016, FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments . Current GAAP requires an “incurred loss” methodology for recognizing credit losses that delays recognition until it is probable a loss has been incurred. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this ASU replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this ASU require a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit loss, which will be more decision useful to users of the financial statements. The amendments in this ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2021. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. While the Company has not quantified the impact of this ASU, it does expect changing from the current incurred loss model to an expected loss model will result in an earlier recognition of losses. Statement of Cash Flows (Topic 230) In August 2016, FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments . There is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230 and other Topics. This ASU addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. Those eight issues are (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions, and (8) separately identifiable cash flows and application of the predominance principle. Current GAAP either is unclear or does not include specific guidance on these eight cash flow classification issues. These amendments provide guidance for each of the eight issues, thereby reducing current and potential future diversity in practice. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company is currently evaluating the provisions of ASU No. 2016-15 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (230), Restricted Cash Income Taxes (Topic 740) In October 2016, the FASB issued ASU No. 2016-16, Income Taxes, Intra-Entity Transfers of Assets Other Than Inventory . The ASU was issued to improve the accounting for income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party; this update clarifies that an entity should recognize the income tax consequences of an intra-entity transfer of assets other than inventory when the transfer occurs. The amendment is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption of the update is permitted. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company does not expect this ASU to have a material impact on the Company’s Consolidated Financial Statements. Business Combinations (Topic 805) In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business . The guidance clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. This guidance is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company does not expect a material impact of this ASU on the Company’s Consolidated Financial Statements. Intangibles—Goodwill and Other (Topic 350) In January 2017, FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment . The amendments in this ASU are intended to reduce the cost and complexity of the goodwill impairment test by eliminating step two from the impairment test. The amendments modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. Under the amendments in this ASU, an entity will perform its annual, or interim, goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount. An impairment charge should be recognized for the amount which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The amendments in this ASU are effective for the Company’s annual or any interim goodwill impairment test in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company early adopted these amendments in 2017, which did not have a material impact on the Company’s Consolidated Financial Statements. Other Income (Subtopic 610-20) In February 2017, the FASB issued ASU No. 2017-05, Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets . This ASU will clarify the scope of Subtopic 610-20 and add guidance for partial sales of nonfinancial assets. The amendments should be applied either on retrospectively to each period presented or with a modified retrospective approach. The amendment is effective for annual periods beginning after December 15, 2018, and interim periods within annual periods beginning after December 15, 2019. The Company is currently evaluating the provisions of ASU No. 2017-05 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. Nonrefundable Fees and Other Costs (Subtopic 310-20) In March 2017, FASB issued ASU No. 2017-08, Receivables—Nonrefundable Fees and Other Costs. The amendments in the ASU shorten the amortization period for certain callable debt securities held at a premium at the earliest call date. Under current GAAP, the Company amortizes the premium as an adjustment of yield over the contractual life of the instrument. As a result, upon exercise of a call on a callable debt security held at a premium, the unamortized premium is charged to earnings. The ASU shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. However, the amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company is required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017-08 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815) In July 2017, FASB issued ASU No. 2017-11, (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception . The ASU simplifies the accounting for certain financial instruments with down round features, a provision in an equity-linked financial instrument (or embedded feature) that provides a downward adjustment of the current exercise price based on the price of future equity offerings. Down round features are common in warrants, convertible preferred shares, and convertible debt instruments. The ASU requires companies to disregard the down round feature when assessing whether the instrument is indexed to its own stock, for purposes of determining liability or equity classification. Companies that provide earnings per share (EPS) data will adjust their basic EPS calculation for the effect of the feature when triggered (i.e., when the exercise price of the related equity-linked financial instrument is adjusted downward because of the down round feature) and will also recognize the effect of the trigger within equity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017‑11 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. Income Statement—Reporting Comprehensive Income (Topic 220) In February 2018, FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The ASU helps organizations address certain stranded income tax effects in accumulated other comprehensive income (AOCI) resulting from the Tax Cuts and Jobs Act. The ASU provides reporting entities with an option to reclassify stranded tax effects within AOCI to retained earnings in 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 (or portion thereof) is recorded. The ASU requires reporting entities to disclose: a description of the accounting policy for releasing income tax effects from AOCI; whether they elect to reclassify the stranded income tax effects from the Tax Cuts and Jobs Act; and information about the other income tax effects that are reclassified. The amendments affect any organization that is required to apply the provisions of Topic 220, Income Statement—Reporting Comprehensive Income , and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP. The amendments are effective for annual periods beginning after December 15, 2018, and interim periods within those fiscal years. The Company early adopted the new guidance on January 1, 2018. The adoption did not impact the Company’s Statements of Operations, and resulted in a reclassification of $763,000 from accumulated other comprehensive income to retained earnings. Financial Services—Depository and Lending (Topic 942) In May 2018, FASB issued ASU No. 2018-06, Codification Improvements to Topic 942, Depository and Lending — Income Taxes . The amendments in this ASU supersede the guidance within Subtopic 942-741 that has been rescinded by the OCC and no longer relevant. A cross-reference between Subtopic 740-30, Income Taxes—Other Considerations or Special Areas, and Subtopic 942-740 is being added to the remaining guidance in Subtopic 740-30 to improve the usefulness of the codification. The amendments in this Update are effective upon issuance, as no accounting requirements are affected. The amendments in this ASU do not have a material impact on the Company’s Consolidated Financial Statements.

Acquisition of a Business

Acquisition of a Business	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Acquisition of a Business	Note 3—Acquisition On October 14, 2016, the Company acquired stock of Ridgestone Financial Services, Inc. (“Ridgestone”) and its subsidiaries under the terms of a definitive merger agreement (“Agreement”) dated June 9, 2016. Ridgestone operated two wholly-owned subsidiaries, Ridgestone Bank and RidgeStone Capital Trust I, and specialized in government guaranteed lending as a participant in the SBA and USDA lending programs. Ridgestone provided financial services through its two full-service banking offices in Brookfield, Wisconsin and Schaumburg, Illinois. In addition, Ridgestone had loan production offices located in Wisconsin (Green Bay and Wausau), Indiana (Indianapolis) and California (Newport Beach). Under the terms of the Agreement, each Ridgestone common share was converted into the right to receive, at the election of the stockholder (subject to proration as outlined in the Agreement), either cash or Company common stock, or the combination of both. Total consideration included aggregate cash in the amount of $36.8 million and the issuance of 4,199,791 shares of the Company’s common stock valued at $16.25 per common share. The transaction resulted in goodwill of $28.9 million, which is nondeductible for tax purposes, as this acquisition was a nontaxable transaction. Goodwill represents the premium paid over the fair value of the net tangible and intangible assets acquired and reflects related synergies expected from the combined operations. Acquisition advisory expenses related to the Ridgestone acquisition of $1.6 million are reflected in non-interest expense on the Consolidated Statements of Operations. Stock issuance costs were not material. There were no contingent assets or liabilities arising from the acquisition. The acquisition of Ridgestone was accounted for using the acquisition method of accounting in accordance with ASC Topic 805. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair value adjustments associated with this transaction were finalized during the fourth quarter of 2017. The following table presents a summary of the estimates of fair values of assets acquired and liabilities assumed as of the acquisition date: Assets Cash and cash equivalents $ 25,480 Securities available-for-sale 27,662 Restricted stock 931 Loans held for sale 15,363 Loans 351,820 Servicing assets 20,295 Premises and equipment 2,011 Other real estate owned 1,525 Other intangible assets 486 Bank-owned life insurance 2,352 Other assets 5,641 Total assets acquired 453,566 Liabilities Deposits 361,370 Federal Home Loan Bank advances 9,773 Junior subordinated debentures 1,339 Accrued expenses and other liabilities 4,958 Total liabilities assumed 377,440 Net assets acquired $ 76,126 Consideration paid Common stock (4,199,791 shares issued at $16.25 per share) 68,247 Cash paid 36,753 Total consideration paid 105,000 Goodwill $ 28,874 The following table presents the acquired non-impaired loans as of the acquisition date: Fair value $ 312,166 Gross contractual amounts receivable 450,292 Estimate of contractual cash flows not expected to be collected (1) 19,661 Estimate of contractual cash flows expected to be collected 430,631 (1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default. The discount on the acquired non-impaired loans is being accreted into income over the life of the loans on an effective yield basis. The operating results of the Company include the operating results produced by the acquired assets and assumed liabilities of Ridgestone for periods from January 1, 2017 through March 31, 2017 and January 1, 2018 through March 31, 2018. Revenues and earnings of the acquired company since the acquisition date have not been disclosed as it is not practicable as Ridgestone was merged into the Company and separate financial information is not readily available.

Securities

Securities	3 Months Ended
	Mar. 31, 2018
Investments Debt And Equity Securities [Abstract]
Securities	Note 4—Securities The following March 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available-for-sale U.S. Treasury Notes $ 22,934 $ 2 $ (195 ) $ 22,741 U.S. Government agencies 64,293 46 (1,718 ) 62,621 Obligations of states, municipalities, and political subdivisions 32,876 21 (749 ) 32,148 Residential mortgage-backed securities Agency 321,957 — (12,907 ) 309,050 Non-agency 55,341 — (1,067 ) 54,274 Commercial mortgage-backed securities Agency 76,866 76 (2,815 ) 74,127 Non-agency 31,688 — (1,344 ) 30,344 Corporate securities 35,257 315 (209 ) 35,363 Other securities 3,628 1,875 (114 ) 5,389 Total $ 644,840 $ 2,335 $ (21,118 ) $ 626,057 March 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Held-to-maturity Obligations of states, municipalities, and political subdivisions $ 23,982 $ 44 $ (335 ) $ 23,691 Residential mortgage-backed securities Agency 49,946 — (822 ) 49,124 Non-agency 38,338 — (734 ) 37,604 Total $ 112,266 $ 44 $ (1,891 ) $ 110,419 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available-for-sale U.S. Treasury Notes $ 14,999 $ — $ (136 ) $ 14,863 U.S. Government agencies 54,248 — (1,290 ) 52,958 Obligations of states, municipalities, and political subdivisions 33,405 100 (335 ) 33,170 Residential mortgage-backed securities Agency 315,103 — (7,646 ) 307,457 Non-agency 39,485 104 (75 ) 39,514 Commercial mortgage-backed securities Agency 70,964 45 (1,966 ) 69,043 Non-agency 31,763 — (792 ) 30,971 Corporate securities 29,573 507 (104 ) 29,976 Other securities 3,627 1,730 (73 ) 5,284 Total $ 593,167 $ 2,486 $ (12,417 ) $ 583,236 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Held-to-maturity Obligations of states, municipalities, and political subdivisions $ 24,030 $ 197 $ (82 ) $ 24,145 Residential mortgage-backed securities Agency 53,731 79 (203 ) 53,607 Non-agency 39,402 174 (51 ) 39,525 Total $ 117,163 $ 450 $ (336 ) $ 117,277 The Company did not classify securities as trading during the three months ended March 31, 2018 or during 2017. Gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2018 and December 31, 2017 are summarized as follows: Less than 12 Months 12 Months or Longer Total March 31, 2018 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale U.S. Treasury Notes 6 $ 9,954 $ (12 ) $ 9,817 $ (183 ) $ 19,771 $ (195 ) U.S. Government agencies 9 989 (10 ) 51,558 (1,708 ) 52,547 (1,718 ) Obligations of states, municipalities and political subdivisions 36 22,418 (475 ) 4,374 (274 ) 26,792 (749 ) Residential mortgage-backed securities Agency 43 33,601 (598 ) 275,450 (12,309 ) 309,051 (12,907 ) Non-agency 6 49,937 (885 ) 4,337 (182 ) 54,274 (1,067 ) Commercial mortgage-backed securities Agency 8 7,228 (24 ) 55,306 (2,791 ) 62,534 (2,815 ) Non-agency 5 — — 30,344 (1,344 ) 30,344 (1,344 ) Corporate securities 6 8,438 (131 ) 2,434 (78 ) 10,872 (209 ) Other securities 1 — — 1,880 (114 ) 1,880 (114 ) Total 120 $ 132,565 $ (2,135 ) $ 435,500 $ (18,983 ) $ 568,065 $ (21,118 ) Less than 12 Months 12 Months or Longer Total March 31, 2018 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Held-to-maturity Obligations of states, municipalities, and political subdivisions 24 $ 15,870 $ (286 ) $ 1,539 $ (49 ) $ 17,409 $ (335 ) Residential mortgage-backed securities Agency 20 42,065 (572 ) 7,060 (250 ) 49,125 (822 ) Non-agency 7 33,441 (591 ) 4,162 (143 ) 37,603 (734 ) Total 51 $ 91,376 $ (1,449 ) $ 12,761 $ (442 ) $ 104,137 $ (1,891 ) Less than 12 Months 12 Months or Longer Total December 31, 2017 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale U.S. Treasury Notes 5 $ 4,998 $ (2 ) $ 9,865 $ (134 ) $ 14,863 $ (136 ) U.S. Government agencies 9 992 (7 ) 51,966 (1,283 ) 52,958 (1,290 ) Obligations of states, municipalities and political subdivisions 29 16,059 (137 ) 4,453 (198 ) 20,512 (335 ) Residential mortgage-backed securities Agency 41 15,441 (181 ) 292,016 (7,465 ) 307,457 (7,646 ) Non-agency 1 — — 4,565 (75 ) 4,565 (75 ) Commercial mortgage-backed securities Agency 7 — — 57,442 (1,966 ) 57,442 (1,966 ) Non-agency 5 — — 30,971 (792 ) 30,971 (792 ) Corporate securities 3 2,406 (80 ) 2,489 (24 ) 4,895 (104 ) Other securities 1 — — 1,921 (73 ) 1,921 (73 ) Total 101 $ 39,896 $ (407 ) $ 455,688 $ (12,010 ) $ 495,584 $ (12,417 ) Less than 12 Months 12 Months or Longer Total December 31, 2017 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Held-to-maturity Obligations of states, municipalities, and political subdivisions 12 $ 7,409 $ (38 ) $ 1,548 $ (44 ) $ 8,957 $ (82 ) Residential mortgage-backed securities Agency 13 24,344 (107 ) 7,935 (96 ) 32,279 (203 ) Non-agency 3 10,458 (10 ) 4,382 (41 ) 14,840 (51 ) Total 28 $ 42,211 $ (155 ) $ 13,865 $ (181 ) $ 56,076 $ (336 ) Certain o available-for-sale The proceeds three months ended March 31, 2018 For the Three Months Ended March 31, 2018 2017 Proceeds $ — $ 8 Gross gains — 8 Gross losses — — There were no gains or losses reclassified from income ( three months ended March 31, 2017 Securities pledged at March 31, 2018 and December 31, 2017 had carrying amounts of $348.6 million and $262.5 million, At March 31, 2018, the Amortized Cost Fair Value Available-for-sale Due in one year or less $ 5,695 $ 5,689 Due from one to five years 88,763 87,589 Due from five to ten years 47,396 46,274 Due after ten years 14,042 14,013 Mortgage-backed securities 485,852 467,795 Other securities with no defined maturity 3,092 4,697 Total $ 644,840 $ 626,057 Held-to-maturity Due from one to five years $ 3,523 $ 3,500 Due from five to ten years 11,706 11,523 Due after ten years 8,753 8,668 Mortgage-backed securities 88,284 86,728 Total $ 112,266 $ 110,419

Loan and Lease Receivables

Loan and Lease Receivables	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loan and Lease Receivables	Note 5—Loan Outstanding loan and lease receivables as of the dates shown were categorized as follows: March 31, December 31, 2018 2017 Commercial real estate $ 840,958 $ 891,971 Residential real estate 568,030 577,123 Construction, land development, and other land 117,597 105,996 Commercial and industrial 569,647 522,254 Installment and other 4,082 4,182 Lease financing receivables 177,932 174,165 Total loans and leases 2,278,246 2,275,691 Net unamortized deferred fees and costs (1,357 ) (1,720 ) Initial direct costs 3,529 3,521 Allowance for loan and lease losses (17,640 ) (16,706 ) Net loans and leases $ 2,262,778 $ 2,260,786 March 31, December 31, 2018 2017 Lease financing receivables Net minimum lease payments $ 193,146 $ 188,986 Unguaranteed residual values 1,613 1,644 Unearned income (16,827 ) (16,465 ) Total lease financing receivables 177,932 174,165 Initial direct costs 3,529 3,521 Lease financial receivables before allowance for lease losses $ 181,461 $ 177,686 Total loans and leases consist of originated loans and leases, acquired impaired loans and acquired non-impaired loans and leases. At March 31, 2018 and December 31, 2017, total loans and leases included the guaranteed amount of U.S. Government guaranteed loans of $73.2 million and $77.0 million, respectively. At March 31, 2018 and December 31, 2017, installment and other loans included overdraft deposits of $467,000 and $617,000, respectively, which were reclassified as loans. At March 31, 2018 and December 31, 2017, loans and loans held for sale pledged as security for borrowings were $530.0 million and $516.9 million, respectively. The minimum Minimum Lease Payments 2018 $ 51,913 2019 58,980 2020 42,897 2021 25,541 2022 12,131 Thereafter 1,684 Total $ 193,146 Originated loan Topic Topic March 31, 2018 Originated Acquired Impaired Acquired Non- Impaired Total Commercial real estate $ 485,324 $ 157,956 $ 197,589 $ 840,869 Residential real estate 397,516 139,858 30,785 568,159 Construction, land development, and other land 110,092 5,156 1,822 117,070 Commercial and industrial 470,689 8,055 89,985 568,729 Installment and other 3,645 449 36 4,130 Lease financing receivables 151,468 — 29,993 181,461 Total loans and leases $ 1,618,734 $ 311,474 $ 350,210 $ 2,280,418 December 31, 2017 Originated Acquired Impaired Acquired Non- Impaired Total Commercial real estate $ 513,622 $ 166,712 $ 211,359 $ 891,693 Residential real estate 400,571 144,562 32,085 577,218 Construction, land development, and other land 97,638 5,946 1,845 105,429 Commercial and industrial 416,499 10,008 94,731 521,238 Installment and other 3,724 462 42 4,228 Lease financing receivables 141,329 — 36,357 177,686 Total loans and leases $ 1,573,383 $ 327,690 $ 376,419 $ 2,277,492 The outstanding March 31, 2018 December 31, 2017 Outstanding Balance Carrying Value Outstanding Balance Carrying Value Commercial real estate $ 227,322 $ 157,956 $ 235,898 $ 166,712 Residential real estate 200,524 139,858 207,660 144,562 Construction, land development, and other land 13,108 5,156 13,270 5,946 Commercial and industrial 16,079 8,055 18,333 10,008 Installment and other 1,796 449 1,819 462 Total acquired impaired loans $ 458,829 $ 311,474 $ 476,980 $ 327,690 The following table summarizes the changes in accretable yield for acquired impaired loans for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Beginning balance $ 36,446 $ 36,868 Accretion to interest income (5,691 ) (5,684 ) Reclassification from nonaccretable difference, net 8,545 3,560 Ending balance $ 39,300 $ 34,744 Acquired non-impaired loans and leases —The unpaid principal balance and carrying value for acquired non-impaired loans and leases at March 31, 2018 and December 31, 2017 were as follows: March 31, 2018 December 31, 2017 Unpaid Principal Balance Carrying Value Unpaid Principal Balance Carrying Value Commercial real estate $ 203,539 $ 197,589 $ 221,710 $ 211,359 Residential real estate 31,291 30,785 32,605 32,085 Construction, land development, and other land 1,881 1,822 1,926 1,845 Commercial and industrial 100,894 89,985 105,529 94,731 Installment and other 350 36 355 42 Lease financing receivables 31,227 29,993 37,476 36,357 Total acquired non-impaired loans and leases $ 369,182 $ 350,210 $ 399,601 $ 376,419

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments	Note 6—Allowance for Loans and leases The following March 31, 2018 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Allowance for loan and lease losses Three months ended Beginning balance $ 4,794 $ 1,638 $ 222 $ 7,418 $ 41 $ 2,593 $ 16,706 Provisions (releases) 934 (74 ) 397 3,424 20 414 5,115 Charge-offs (409 ) — (418 ) (3,085 ) — (510 ) (4,422 ) Recoveries — — — 6 — 235 241 Ending balance $ 5,319 $ 1,564 $ 201 $ 7,763 $ 61 $ 2,732 $ 17,640 Ending balance: Individually evaluated for impairment $ 1,572 $ 153 $ — $ 2,963 $ 14 $ — $ 4,702 Collectively evaluated for impairment 1,827 1,036 177 3,626 11 2,732 9,409 Loans acquired with deteriorated credit quality 1,920 375 24 1,174 36 — 3,529 Total allowance for loan and lease losses $ 5,319 $ 1,564 $ 201 $ 7,763 $ 61 $ 2,732 $ 17,640 March 31, 2018 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Loans and leases ending balance: Individually evaluated for impairment $ 12,375 $ 2,029 $ — $ 12,598 $ 14 $ — $ 27,016 Collectively evaluated for impairment 670,538 426,272 111,914 548,076 3,667 181,461 1,941,928 Loans acquired with deteriorated credit quality 157,956 139,858 5,156 8,055 449 — 311,474 Total loans and leases $ 840,869 $ 568,159 $ 117,070 $ 568,729 $ 4,130 $ 181,461 $ 2,280,418 March 31, 2017 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Allowance for loan and lease losses Three months ended Beginning balance $ 1,945 $ 2,483 $ 742 $ 4,196 $ 334 $ 1,223 $ 10,923 Provisions (releases) 340 1 (325 ) 855 (3 ) 1,023 1,891 Charge-offs (238 ) (67 ) — (215 ) — (770 ) (1,290 ) Recoveries — — — — — 293 293 Ending balance $ 2,047 $ 2,417 $ 417 $ 4,836 $ 331 $ 1,769 $ 11,817 Ending balance: Individually evaluated for impairment $ — $ 282 $ 26 $ 966 $ 325 $ — $ 1,599 Collectively evaluated for impairment 1,622 1,470 391 3,210 5 1,769 8,467 Loans acquired with deteriorated credit quality 425 665 — 660 1 — 1,751 Total allowance for loan and lease losses $ 2,047 $ 2,417 $ 417 $ 4,836 $ 331 $ 1,769 $ 11,817 March 31, 2017 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Loans and leases ending balance: Individually evaluated for impairment $ 9,764 $ 1,262 $ 85 $ 3,317 $ 327 $ — $ 14,755 Collectively evaluated for impairment 611,397 430,469 99,114 432,036 2,054 162,675 1,737,745 Loans acquired with deteriorated credit quality 201,689 169,676 6,116 13,114 439 — 391,034 Total loans and leases $ 822,850 $ 601,407 $ 105,315 $ 448,467 $ 2,820 $ 162,675 $ 2,143,534 The Company increased the allowance for loan and lease losses by $934,000 and $894,000 for the three months ended March 31, 2018 and 2017, respectively. For acquired impaired loans, the Company decreased the allowance for loan and lease losses by $345,000 for the three months ended March 31, 2018. The Company increased the allowance for loan and lease losses for acquired impaired loans by $140,000 for the three months ended March 31, 2017. The following and March 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded Commercial real estate $ 6,151 $ 7,116 $ — Residential real estate 1,682 1,653 — Commercial and industrial 6,441 7,678 — With an allowance recorded Commercial real estate 6,224 7,684 1,572 Residential real estate 347 345 153 Commercial and industrial 6,157 9,160 2,963 Installment and other 14 14 14 Total impaired loans $ 27,016 $ 33,650 $ 4,702 December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded Commercial real estate $ 11,425 $ 12,936 $ — Residential real estate 2,075 2,046 — Commercial and industrial 5,470 6,774 — With an allowance recorded Commercial real estate 2,459 2,634 1,101 Residential real estate 354 351 158 Commercial and industrial 9,314 9,724 2,692 Installment and other 14 14 14 Total impaired loans $ 31,111 $ 34,479 $ 3,965 The following tables summarize the average recorded investment and interest income recognized for loans and leases considered impaired, which excludes acquired impaired loans, for the periods ended as follows: March 31, 2018 Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial real estate $ 9,039 $ 103 Residential real estate 1,930 10 Commercial and industrial 7,300 62 With an allowance recorded Commercial real estate 4,122 37 Residential real estate 351 1 Commercial and industrial 6,975 102 Installment and other 14 — Total impaired loans $ 29,731 $ 315 March 31, 2017 Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial real estate $ 9,798 $ 130 Residential real estate 787 7 Commercial and industrial 1,402 60 With an allowance recorded Residential real estate 488 1 Construction, land development and other land 86 6 Commercial and industrial 1,881 3 Installment and other 328 4 Total impaired loans $ 14,770 $ 211 For purposes The following March 31, 2018 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Pass $ 593,209 $ 393,416 $ 85,634 $ 465,449 $ 3,648 $ 178,759 $ 1,720,115 Watch 65,816 29,875 23,127 64,914 2 159 183,893 Special Mention 10,665 2,573 3,153 12,272 17 1,092 29,772 Substandard 13,223 2,437 — 18,039 14 1,162 34,875 Doubtful — — — — — 289 289 Loss — — — — — — — Total $ 682,913 $ 428,301 $ 111,914 $ 560,674 $ 3,681 $ 181,461 $ 1,968,944 December 31, 2017 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Pass $ 638,066 $ 398,743 $ 73,935 $ 415,163 $ 3,732 $ 174,672 $ 1,704,311 Watch 58,217 29,165 22,380 67,024 20 190 176,996 Special Mention 14,645 2,251 3,168 13,535 — 1,293 34,892 Substandard 14,053 2,497 — 15,508 14 1,259 33,331 Doubtful — — — — — 272 272 Loss — — — — — — — Total $ 724,981 $ 432,656 $ 99,483 $ 511,230 $ 3,766 $ 177,686 $ 1,949,802 The following tables summarize contractual delinquency information for acquired non-impaired and originated loans and leases by category at March 31, 2018 and December 31, 2017: March 31, 2018 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days and Accruing Non- accrual Total Past Due Current Total Commercial real estate $ 9,266 $ — $ — $ 8,194 $ 17,460 $ 665,453 $ 682,913 Residential real estate 79 — — 1,848 1,927 426,374 428,301 Construction, land development, and other land — — — — — 111,914 111,914 Commercial and industrial 10,064 1,704 — 12,916 24,684 535,990 560,674 Installment and other 17 — — 14 31 3,650 3,681 Lease financing receivables 1,282 377 — 654 2,313 179,148 181,461 Total $ 20,708 $ 2,081 $ — $ 23,626 $ 46,415 $ 1,922,529 $ 1,968,944 December 31, 2017 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days and Accruing Non- accrual Total Past Due Current Total Commercial real estate $ 4,783 $ 968 $ — $ 8,459 $ 14,210 $ 710,771 $ 724,981 Residential real estate 148 — — 2,092 2,240 430,416 432,656 Construction, land development, and other land — — — — — 99,483 99,483 Commercial and industrial 6,667 967 — 4,348 11,982 499,248 511,230 Installment and other 18 — — 14 32 3,734 3,766 Lease financing receivables 997 638 — 851 2,486 175,200 177,686 Total $ 12,613 $ 2,573 $ — $ 15,764 $ 30,950 $ 1,918,852 $ 1,949,802 At March 31, 2018 and December 31, 2017, the a of $215,000 and $357,000 March 31, 2018 and December 31, 2017 Loans modified three months ended March 31, 2018 At March 31, 2018 and December 31, 2017, the three months ended March 31, 2018 and 2017

Servicing Assets

Servicing Assets	3 Months Ended
	Mar. 31, 2018
Transfers And Servicing [Abstract]
Servicing Assets	Note 7—Servicing Activity for the three months ended March 31, 2018 is Three Months Ended March 31, 2018 2017 Beginning balance $ 21,400 $ 21,091 Additions, net 2,102 1,422 Changes in fair value (1,887 ) (1,290 ) Ending balance $ 21,615 $ 21,223 Loans serviced as of March 31, 2018 and December 31, 2017: March 31, December 31, 2018 2017 Loan portfolios serviced for: SBA guaranteed loans 1,066,269 1,021,143 USDA guaranteed loans 93,650 91,758 Total $ 1,159,919 $ 1,112,901 The fair Generally, as interest rates rise on variable rate loans, loan prepayments increase due to an increase in refinance activity, which may result in a decrease in the fair value of servicing assets. Measurement of fair value is limited to the condition existing and the assumptions used as of a particular point in time, and those assumptions may change over time. Refer to Note 16—Fair Value Measurement for further details.

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2018
Banking And Thrift [Abstract]
Other Real Estate Owned	Note 8—Other Real Estate Owned The following table presents the change in other real estate owned (“OREO”) for the three months ended March 31, 2018 and 2017. Three Months Ended March 31, 2018 2017 Beginning balance $ 10,626 $ 16,570 Net additions to OREO 1,044 808 Dispositions of OREO (1,123 ) (3,929 ) Valuation adjustments (81 ) (276 ) Ending balance $ 10,466 $ 13,173 At March 31, 2018 and December 31, 2017, the balance of real estate owned included $2.9 million and $3.6 million, respectively, of foreclosed residential real estate properties recorded as a result of obtaining physical possession of the property. At March 31, 2018 and December 31, 2017, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process is $2.4 million and $1.9 million, respectively.

Goodwill, Core Deposit Intangib

Goodwill, Core Deposit Intangible and Other Intangible Assets	3 Months Ended
	Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, Core Deposit Intangible and Other Intangible Assets	Note 9—Goodwill, Core Deposit Intangible and Other Intangible Assets The following table summarizes the changes in the Company’s goodwill and core deposit intangible assets for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Goodwill Core Intangible Goodwill Core Deposit Intangible Beginning balance $ 54,562 $ 16,720 $ 51,975 $ 19,776 Amortization or accretion — (761 ) — (765 ) Ending balance $ 54,562 $ 15,959 $ 51,975 $ 19,011 Accumulated amortization or accretion N/A $ 14,227 N/A $ 11,175 Weighted average remaining amortization or accretion period N/A 5.4 years N/A 6.4 Years The Company had other intangible assets of $32,000 and $36,000 as of March 31, 2018 and December 31, 2017, respectively, related to trademark-related transactions. The following table presents the estimated amortization expense for core deposit intangible and other intangible assets recognized at March 31, 2018: Estimated Amortization 2018 $ 2,295 2019 3,050 2020 3,027 2021 3,017 2022 3,010 Thereafter 1,592 Total $ 15,991

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 10—Income The Company uses an estimated annual effective tax rate method in computing its interim tax provision. This effective tax rate is based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates. The effective tax rates for the three months ended March 31, 2018 and 2017 were 16.3% and 40.9%, respectively. The reduction in the effective tax rate is primarily a result of the passage of the Tax Cuts and Jobs Act (the “Tax Act”), which was enacted on December 22, 2017. Among other things, the Tax Act reduces the corporate federal income tax rate from 35% to 21%, effective January 1, 2018. Also on December 22, 2017, the SEC issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the Tax Act’s impact. SAB 118 provides a measurement period, not to extend beyond one year from the date of enactment during which a company, acting in good faith, may complete the accounting for the impacts of the Tax Act. The Company recorded a net income tax benefit of $724,000 as a result of the rate change. Net deferred tax assets remained relatively unchanged at $47.4 million at March 31, 2018 compared to December 31, 2017. The reduction in the Company’s net operation loss carryforwards being applied to the current year tax liability was offset by an increase in its deferred tax asset related to unrealized holding losses on securities available-for-sale.

Deposits

Deposits	3 Months Ended
	Mar. 31, 2018
Deposits [Abstract]
Deposits	Note 11—Deposits The composition of deposits was as follows as of March 31, 2018 and December 31, 2017: March 31, December 31, 2018 2017 Non-interest bearing demand deposits $ 749,892 $ 760,887 Interest bearing checking accounts 196,802 186,611 Money market demand accounts 382,282 349,862 Other savings 439,277 437,212 Time deposits (below $250,000) 665,541 627,255 Time deposits ($250,000 and above) 90,753 81,502 Total deposits $ 2,524,547 $ 2,443,329 Time deposits of $250,000 or more included no

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	3 Months Ended
	Mar. 31, 2018
Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances	Note 12—Federal The following March 31, December 31, 2018 2017 Federal Home Loan Bank advances $ 380,000 $ 361,506 Weighted average cost 1.88 % 1.49 % At March 31, 2018, fixed-rate advances totaled $250.0 million with an interest rate of 2.02% and maturing June 2018. March 31, 2018, April The Company’s required investment in FHLB stock is $1 for every $20 in advances. Refer to Note 4 Securities for additional discussion. At March 31, 2018 and December 31, 2017, the Bank has additional borrowing capacity from the FHLB of $797.5 million and $795.0 million, respectively, subject to the availability of proper collateral. The Company hedges interest rates on borrowed funds using interest rate swaps through which the Company receives variable amounts and pays fixed amounts. Refer to Note 17—Derivative Instruments and Hedge Activities for additional information.

Other Borrowings

Other Borrowings	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Other Borrowings	Note 13—Other Borrowings The following is a summary of the Company’s other borrowings as of March 31, 2018 and December 31, 2017: March 31, December 31, 2018 2017 Securities sold under agreements to repurchase $ 27,815 $ 31,187 Line of credit — — Total $ 27,815 $ 31,187 Securities On March 31, 2018 3.75 March 31, 2018 The following March 31, December 31, 2018 2017 Federal Reserve Bank of Chicago discount window line $ 156,077 $ 144,248 Available federal funds lines 55,000 55,000

Junior Subordinated Debentures

Junior Subordinated Debentures	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Junior Subordinated Debentures	Note 14—Junior Subordinated Debentures At March 31, 2018 and December 31, 2017, the Name of Trust Aggregate Principal Amount March 31, 2018 Aggregate Principal Amount December 31, 2017 Stated Maturity Contractual Rate at March 31, 2018 Interest Rate Spread Metropolitan $ 35,000 $ 35,000 March 4.97 % Three-month LIBOR + 2.79% RidgeStone Capital Trust I 1,500 1,500 June 30, 2033 5.09 % Five-year LIBOR + 3.50% Total liability, at par 36,500 36,500 Discount (8,700 ) (8,853 ) Total liability, at carrying value $ 27,800 $ 27,647 March 31, 2018 As part of the Ridgestone acquisition, the Company assumed the obligations to RidgeStone Capital Trust I of $1.5 million in principal amount, which was formed for the issuance of trust preferred securities. Refer to Note 3—Acquisition of a Business for additional information. Beginning on June 30, 2008, the interest rate reset to the five-year LIBOR plus 3.50% (5.09% at March 31, 2018 and December 31, 2017), which is in effect until September 30, 2018 and updated every five years. Interest is paid on a quarterly basis. The Company has the right to redeem the debentures, in whole or in part, on any interest payment date on or after June 30, 2008. There was no accrued interest payable as of March 31, 2018 or December 31, 2017. The Trusts

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Note 15—Commitments Legal —I n th e ordinar y cours e o f business , th e Compan y an d Ban k hav e various outstandin g commitment s an d contingen t liabilitie s tha t ar e no t recognize d i n th e accompanyin g consolidated financia l statements . I n addition , th e Compan y ma y b e a defendan t i n certai n claim s an d lega l action s arisin g i n the ordinar y cours e o f business . I n th e opinio n o f management , afte r consultatio n wit h lega l counsel , th e ultimate dispositio n o f thes e matter s i s currentl y no t expecte d t o hav e a materia l advers e effec t o n th e Company’s Consolidated Statements of Financial Condition. Operating s —The Company has entered into various operating lease agreements primarily for facilities and land on which banking facilities are located. Certain lease agreements have renewal options at the end of the original lease term and certain lease agreements have escalation clauses in the rent payments. The minimum Minimum Commitments 2018 $ 2,307 2019 2,600 2020 2,089 2021 1,809 2022 972 Thereafter 2,073 Total $ 11,850 The Company’s During t C Commitments t —The Bank is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Statements of Financial Condition. The contractual or notional amounts of those instruments reflect the extent of involvement the Bank has in particular classes of financial instruments. The Company’s exposure The following March 31, 2018 and December 31, 2017 March 31, December 31, 2018 2017 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to extend credit $ 58,074 $ 510,822 $ 55,924 $ 467,429 Standby letters of credit 2,570 3,538 1,226 3,337 Total $ 60,644 $ 514,360 $ 57,150 $ 470,766 Commitments Standby letters Commitments

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement	Note 16—Fair Value Measurement Fair These types Level 1 —Quoted prices in active markets for identical assets or liabilities. Level 2 —Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 —Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the asset or liability. Unobservable inputs are used to measure fair value to the extent that observable inputs are not available. The Company’s own data used to develop unobservable inputs may be adjusted for market considerations when reasonably available. A financial The Company used the Securities e —The Company obtains fair value measurements from an independent pricing service. Management reviews the procedures used by the third party, including significant inputs used in the fair value calculations. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. When market quotes are not readily accessible or available, alternative approaches are utilized, such as matrix or model pricing. The Company’s methodology for pricing non-rated bonds focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated municipal bond, the Company references a publicly issued bond by the same issuer if available as well as other additional key metrics to support the credit worthiness. Typically, pricing for these types of bonds would require a higher yield than a similar rated bond from the same issuer. A reduction in price is applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one notch lower (i.e. a “AA” rating for a comparable bond would be reduced to “AA-” for the Company’s valuation). In 2018 and 2017, all of the ratings derived by the Company were “BBB” or better with and without comparable bond proxies. The fair value measurement of municipal bonds is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined, the Company obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Servicing s —Fair value is based on a loan-by-loan basis taking into consideration the original term to maturity, the current age of the loan and the remaining term to maturity. The valuation methodology utilized for the servicing assets begins with generating future cash flows for each servicing asset, based on their unique characteristics and market-based assumptions for prepayment speeds. The present value of the future cash flows are then calculated utilizing market-based discount rate assumptions. Derivative s —Interest rate swaps are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are validated by comparison with valuations provided by the respective counterparties. Derivative financial instruments are included in other assets and other liabilities in the Consolidated Statements of Financial Condition. The following Fair Value Measurements Using March 31, 2018 Fair Value Level 1 Level 2 Level 3 Financial assets Securities available-for-sale U.S. Treasury Notes $ 22,741 $ 22,741 $ — $ — U.S. Government agencies 62,621 — 62,621 — Obligations of states, municipalities, and political subdivisions 32,148 — 31,773 375 Mortgage-backed securities; residential Agency 309,050 — 309,050 — Non-agency 54,274 — 54,274 — Mortgage-backed securities; commercial Agency 74,127 — 74,127 — Non-agency 30,344 — 30,344 — Corporate securities 35,363 — 35,363 — Other securities 5,389 1,880 2,817 692 Servicing assets 21,615 — — 21,615 Derivative assets 10,500 — 10,500 — Financial liabilities Derivative liabilities 1,432 — 1,430 2 Fair Value Measurements Using December 31, 2017 Fair Value Level 1 Level 2 Level 3 Financial assets Securities available-for-sale U.S. Treasury Notes $ 14,863 $ 14,863 $ — $ — U.S. Government agencies 52,958 — 52,958 — Obligations of states, municipalities, and political subdivisions 33,170 — 32,795 375 Mortgage-backed securities; residential Agency 307,457 — 307,457 — Non-agency 39,514 — 39,514 — Mortgage-backed securities; commercial Agency 69,043 — 69,043 — Non-agency 30,971 — 30,971 — Corporate securities 29,976 — 29,976 — Other securities 5,284 1,921 2,686 677 Servicing assets 21,400 — — 21,400 Derivative assets 5,981 — 5,981 — Financial liabilities Derivative liabilities 994 — 994 — During 2016, the T he Company has purchased privately-issued municipal securities that are categorized as Level 3. These municipal securities are bonds issued for one municipal government entity located in the Chicago metropolitan area and are privately placed, non-rated bonds without Committee on Uniform Security Identification Procedures numbers. The Company did not have any transfers three months ended March 31, 2018 and The following table presents additional information about financial assets measured at fair value on recurring basis for which the Company used significant unobservable inputs (Level 3): Three Months Ended March 31, 2018 2017 2018 2017 Investment Securities Servicing Assets Balance, beginning of period $ 1,052 $ 1,080 $ 21,400 $ 21,091 Additions, net — — 2,102 1,422 Amortization 1 1 — — Change in unrealized loss 14 — — — Change in fair value — — (1,887 ) (1,290 ) Balance, end of period $ 1,067 $ 1,081 $ 21,615 $ 21,223 The following Financial Instruments Valuation Technique Unobservable Inputs Range of Inputs Weighted Average Range Impact to Valuation from an Increased or Higher Input Value Obligations of states, municipalities, and political obligations Discounted Probability of default 2.2%—2.4% 2.3 % Decrease Single issuer trust preferred Discounted cash flow Probability of default 7.5%—9.9% 8.9 % Decrease Servicing assets Discounted cash flow Prepayment speeds 5.6%—16.3% 9.3 % Decrease Discount rate 10.4%—20.6% 14.2 % Decrease Expected weighted average loan life 0.8—7.9 years 5.5 years Increase The Company used the Impaired ) —Impaired loans, other than those existing on the date of a business acquisition, are primarily carried at the fair value of the underlying collateral, less estimated costs to sell, if the loan is collateral dependent. Valuations of impaired loans that are collateral dependent are supported by third party appraisals in accordance with the Bank’s credit policy. Impaired loans that are not collateral dependent are not material. Assets e —Assets held for sale consist of former branch locations, vacant land, and a house previously purchased for expansion. Assets are considered held for sale when management has approved to sell the assets following a branch closure or other events. The properties are being actively marketed and transferred to assets held for sale based on the lower of carrying value or its fair value, less estimated costs to sell. Other d —Certain assets held within other real estate owned represent real estate or other collateral that has been adjusted to its estimated fair value, less cost to sell, as a result of transferring from the loan portfolio at the time of foreclosure or repossession and based on management’s periodic impairment evaluation. From time to time, non-recurring fair value adjustments to other real estate owned are recorded to reflect partial write-downs based on an observable market price or current appraised value of property. Adjustments Fair Value Measurements Using March 31, 2018 Fair Value Level 1 Level 2 Level 3 Non-recurring Impaired loans (excluding acquired impaired loans) Commercial real estate $ 10,803 $ — $ — $ 10,803 Residential real estate 1,876 — — 1,876 Construction, land development, and other land — — — — Commercial and industrial 9,635 — — 9,635 Installment and other — — — — Assets held for sale 9,030 — — 9,030 Other real estate owned 10,466 — — 10,466 Fair Value Measurements Using December 31, 2017 Fair Value Level 1 Level 2 Level 3 Non-recurring Impaired loans (excluding acquired impaired loans) Commercial real estate $ 12,783 $ — $ — $ 12,783 Residential real estate 2,271 — — 2,271 Construction, land development, and other land — — — — Commercial and industrial 12,092 — — 12,092 Installment and other — — — — Assets held for sale 9,779 — — 9,779 Other real estate owned 10,626 — — 10,626 The following Financial Instruments Valuation Technique Unobservable Inputs Range of Inputs Impact to Valuation from an Increased or Higher Input Value Impaired loans (excluding acquired impaired loans) Appraisals Appraisal adjustments, sales costs and other discount adjustments for market conditions 6% - 10% Decrease Assets held for sale List price, contract price Sales costs and other discount adjustments for market conditions 7% Decrease Other real estate owned Appraisals Appraisal adjustments, sales costs and other discount adjustments for market conditions 7% - 20% Decrease The following Cash and cash equivalent s —For these short-term instruments, the carrying amount is a reasonable estimate of fair value. The fair value for time certificates with other banks is based on the market values for comparable investments. Securities y —The Company obtains fair value measurements from an independent pricing service. Management reviews the procedures used by the third party, including significant inputs used in the fair value calculations. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. When market quotes are not readily accessible or available, alternative approaches are utilized, such as matrix or model pricing. Restricted k —The fair value has been determined to approximate cost. Loans held for — The fair value of loans held for sale are based on quoted market prices, where available, and determined by discounted estimated cash flows using interest rates approximating the Company’s current origination rates for similar loans adjusted to reflect the inherent credit risk. Loan —For certain variable rate loans that reprice frequently and with no significant changes in credit risk, fair value is estimated at carrying value. The fair value of other types of loans is estimated by discounting future cash flows, using current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. Deposit s —The fair value of demand deposits, savings accounts, and certain money market deposits is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated by discounting future cash flows, using rates currently offered for deposits of similar remaining maturities. Federal —The fair value of FHLB advances is estimated by discounting the agreements based on maturities using rates currently offered for FHLB advances of similar remaining maturities adjusted for prepayment penalties that would be incurred if the borrowings were paid off on the measurement date. Securities e —The carrying amount approximates fair value due to maturities of less than ninety days. Junior subordinated debenture s —The fair value of junior subordinated debentures, in the form of trust preferred securities, is determined using rates currently available to the Company for debt with similar terms and remaining maturities. Accrued interest —The carrying amount approximates fair value. Commitments t —The fair values of these off-balance sheet commitments to extend credit and commercial and standby letters of credit are not considered practicable to estimate because of the lack of quoted market prices and the inability to estimate fair value without incurring excessive costs. The estimated March 31, December 31, Fair Value 2018 2017 Hierarchy Level Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Financial assets Cash and due from banks 1 $ 17,396 $ 17,396 $ 19,404 $ 19,404 Interest bearing deposits with other banks 2 110,645 110,645 38,945 38,945 Securities held-to-maturity 2 112,266 110,419 117,163 117,277 Other restricted stock 2 17,177 17,177 16,343 16,343 Loans held for sale 3 8,219 9,122 5,212 5,851 Loans and lease receivables, net 3 2,262,778 2,230,050 2,260,786 2,240,235 Accrued interest receivable 3 6,971 6,971 7,670 7,670 Financial liabilities Non-interest bearing deposits 2 749,892 749,892 760,887 760,887 Interest bearing deposits 2 1,774,655 1,769,476 1,682,442 1,678,535 Accrued interest payable 2 1,612 1,612 1,306 1,306 Line of credit 2 — — — — Federal Home Loan Bank advances 2 380,000 380,000 361,506 361,500 Securities sold under repurchase agreement 2 27,815 27,815 31,187 31,187 Junior subordinated debentures 3 27,800 34,025 27,647 33,907

Derivative Instruments and Hedg

Derivative Instruments and Hedge Activities	3 Months Ended
	Mar. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedge Activities	Note 17—Derivative Instruments and Hedge Activities The Company recognizes derivative financial instruments at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Financial Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. The following tables present the fair value of the Company’s derivative financial instruments and classification on the Consolidated Statements of Financial Condition as of March 31, 2018 and December 31, 2017: March 31, 2018 December 31, 2017 Fair Value Fair Value Notional Amount Other Assets Other Liabilities Notional Amount Other Assets Other Liabilities Derivatives designated as hedging instruments Interest rate swaps designated as cash flow hedges $ 250,000 $ 9,047 $ — $ 250,000 $ 5,030 $ 38 Derivatives not designated as hedging instruments Other interest rate swaps 94,123 1,453 1,430 94,726 951 956 Other credit derivatives 1,250 — 2 — — — Total derivatives $ 345,373 $ 10,500 $ 1,432 $ 344,726 $ 5,981 $ 994 Interest rate swaps designated as cash flow hedges —Cash flow hedges of interest payments associated with certain FHLB advances had notional amounts totaling $250.0 million as of March 31, 2018 and December 31, 2017. The aggregate fair value of the swaps is recorded in other assets or other liabilities with changes in fair value recorded in other comprehensive income (loss), net of taxes, to the extent effective. The amount included in accumulated other comprehensive income (loss) would be reclassified to current earnings when the hedged FHLB advances affect earnings. The Company assesses the effectiveness of each hedging relationship by comparing the changes in fair value of the derivative hedging instrument with the changes in fair value of the designated hedged transactions. The Company expects the hedges to remain effective during the remaining terms of the swaps and did not recognize any hedge ineffectiveness in current earnings during the three months ended March 31, 2018 and 2017. Interest recorded on these swap transactions reduced FHLB expense by $61,000 The following table reflects the net gains (losses) recorded in accumulated other comprehensive income (loss) and the Consolidated Statements of Operations relating to the cash flow derivative instruments for the three months ended: March 31, 2018 March 31, 2017 Amount of Gain Recognized in OCI (Effective Portion) Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense Amount of Gain (Loss) Recognized in Other Non-Interest Income (Ineffective Portion) Amount of Gain Recognized in OCI (Effective Portion) Amount of Loss Reclassified from OCI to Income as an Increase to Interest Expense Amount of Gain (Loss) Recognized in Other Non-Interest Income (Ineffective Portion) Interest rate swaps $ 4,070 $ 61 $ — $ (83 ) $ (54 ) $ — Other interest rate swaps —The total combined notional amount was $94.1 million as of March 31, 2018 with maturities ranging from January 2020 to November 2027. The fair values of the interest rate swap agreements are reflected in other assets and other liabilities with corresponding gains or losses reflected in non-interest income. During the three months ended March 31, 2018, there were no transaction fees related to these derivative instruments. During the three months ended March 31, 2017, transaction fees were $113,000. The following table reflects other interest rate swaps as of March 31, 2018: Notional amounts $ 94,123 Derivative assets fair value 1,453 Derivative liabilities fair value 1,430 Weighted average pay rates 4.38 % Weighted average receive rates 4.02 % Weighted average maturity 6.0 years Other credit derivative— The total notional amount was $1.3 million as of March 31, 2018 with a maturity date of January 2025. The fair value of the other credit derivative is reflected in other liabilities with corresponding gains or losses reflected in non-interest income. The credit valuation adjustment (“CVA”) related to the other credit derivative resulted in an increase to other non-interest income of $23,000 during the three months ended March 31, 2018. Credit risk —Derivative instruments are inherently subject to market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the Company’s risk of loss when the counterparty to a derivative contract fails to perform according to the terms of the agreement. Market and credit risks are managed and monitored as part of the Company’s overall asset-liability management process. The credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company’s loan underwriting process. The Company’s loan underwriting process also approves the Bank’s swap counterparty used to mirror the borrowers’ swap. The Company has a bilateral agreement with each swap counterparty that provides that fluctuations in derivative values are to be fully collateralized with either cash or securities. The CVA is a fair value adjustment to the derivative to account for this risk. During the three months ended March 31, 2018, the CVA resulted in an increase to non-interest income of $27,000. During the three months ended March 31, 2017, the CVA resulted in a decrease to non-interest income of $13,000. The Company has entered into a risk participation agreement with a counterparty bank to assume a portion of the credit risk related to borrower transactions. The credit risk related to this derivative is managed through the Company’s loan underwriting process. The Company has agreements with its derivative counterparties that contain a cross-default provision under which if the Company defaults on any of its indebtedness, 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 derivative counterparties that contain a provision where if the Company fails to maintain its status as a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations resulted in a net asset position. The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative asset and liabilities on the Consolidated Statements of Financial Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of: March 31, 2018 December 31, 2017 Derivative Assets Fair Value Derivative Liabilities Fair Value Derivative Assets Fair Value Derivative Liabilities Fair Value Gross amounts recognized $ 10,500 $ 1,432 $ 5,981 $ 994 Less: Amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition $ 10,500 $ 1,432 $ 5,981 $ 994 Gross amounts not offset in the Consolidated Statements of Financial Condition Offsetting derivative positions — — (232 ) (232 ) Collateral posted (10,500 ) (1,424 ) (5,371 ) (745 ) Net credit exposure (excess collateral) $ — $ 8 $ 378 $ 17 As of March 31, 2018, the counterparties posted collateral of $11.5 million, which resulted in excess collateral with the Company. For purposes of this disclosure, the amount of posted collateral by the counterparties is limited to the amount offsetting the derivatives asset.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	Note 18 – Share-Based Compensation In June 2017, the Company adopted the 2017 Omnibus Incentive Compensation Plan (the “Omnibus Plan”) in connection with our initial public offering (“IPO”). The Omnibus Plan provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalent rights and other equity-based, equity-related or cash-based awards. A total of 1,550,000 shares of our common stock have been reserved and are available for issuance under the Omnibus Plan. On July 6, 2017, in conjunction with the completion of the IPO, the Company granted 58,900 restricted shares of the Company’s common stock The following table discloses the changes in restricted shares for the three months ended March 31, 2018: Omnibus Plan Number of Shares Weighted Average Grant Date Fair Value Beginning balance 70,398 $ 20.31 Granted — $ — Vested — $ — Forfeited — $ — Ending balance outstanding at March 31, 2018 70,398 $ 20.31 No restricted shares vested during the three months ended March 31, 2018. The Company recognizes share-based compensation based on the estimated fair value of the restricted stock at the grant date. Share-based compensation expense is included in non-interest expense in the Consolidated Statements of Operations. The following table summarizes restricted stock compensation expense for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Total share-based compensation - restricted stock $ 112 $ — Income tax benefit 381 — Unrecognized compensation expense 1,114 — Weighted-average amortization period remaining 2.6 years — The fair value of the unvested restricted stock awards at March 31, 2018 was $1.6 million. In April 2018, the Company granted 48,943 shares of restricted voting common stock, par value $0.01 per share. Of this total, 24,345 restricted shares will vest ratably over four years on each anniversary of the grant date, 11,165 restricted shares will vest ratably over three years on each anniversary of the grant date, and 2,268 restricted shares will vest on the first anniversary of the grand date, all subject to continued employment. In addition, 11,165 performance-based restricted shares were included in the April 2018 grant. The number of shares which may be earned under the award is dependent upon the Company’s return on average assets over a three-year period ending December 31, 2020, measured in 2018 against the Company’s internal targets and for 2019 and 2020 against a peer group consisting of publicly-traded bank holding companies ranging in asset size from 50% to 200% of the Company’s total assets. Under the award, 25% of the shares will be earned at threshold performance, 100% will be earned at target and 50th percentile performance, and up to 125% of the shares with above target and 75th percentile performance. Any earned shares will vest on the third anniversary of the grant date. The Company maintained a nonqualified, share-based, stock option plan adopted prior to recapitalization (“MBG Plan”). There were no options granted or exercised under this plan during the year ended December 31, 2017. At the time of the Company’s reincorporation in Delaware, in June 2017, the Board of Directors cancelled the MBG Plan and all the respective outstanding options were cancelled. In October 2014, the Company adopted the Byline Bancorp, Inc. Equity Incentive Plan (“BYB Plan”). The maximum number of shares available for grants under this Plan was 2,476,122 shares. During 2016 and 2015, the Company granted options to purchase 212,400 and 1,634,568 shares, respectively, under this plan. The Company did not grant any stock options during the three months ended March 31, 2018 or during the year ended December 31, 2017. In June 2017, the Board of Directors terminated the BYB Plan and no future grants can be made under this plan. Options to purchase a total of 1,696,270 shares remain outstanding under the BYB Plan at March 31, 2018. The types of stock options granted under the BYB Plan were Time Options and Performance Options. The exercise price of each option is equal to the fair value of the stock as of the date of grant. These option awards have vesting periods ranging from 1 to 5 years and have 10-year contractual terms. Stock volatility was computed as the average of the volatilities of peer group companies. The vesting of Time Options is conditional based on completion of service. Performance Options have conditional vesting based on either performance targets or market performance. Certain Performance Options’ performance goals will be satisfied (in whole or in part) if the Bank achieves various performance targets such as profitability, asset quality, and conditional based on market performance, as outlined in the BYB Plan. Each of the performance goals identified are measured for achievement (or failure to achieve) independent of each other. In October 2017, the Board of Directors determined that the Performance Option goals were satisfied, in whole, and these Performance Options converted to Time Options. As a result of the previous completion of service, 414,894 performance options vested on October 3, 2017. The fair values of the stock options were determined using the Black-Scholes-Merton model for Time Options and a Monte Carlo simulation model for Performance Options. The fair values of options under the BYB Plan were determined using the following assumptions as of the grant dates: Time Options Grants 2016 2015 Risk-free interest rate 1.34% - 1.40% 1.68% - 1.85% Expected term (years) 5.2 - 5.6 5.7 - 6.3 Expected stock price volatility 20.39 % 16.18%-16.55% Expected dividend yield 0.00 % 0.00 % Weighted average grant date fair value $ 3.55 $ 2.25 Performance Options Grants 2016 2015 Risk-free interest rate Implied forward rates Implied forward rates Expected term (years) Variable Variable Expected stock price volatility 20.34% - 20.39% 16.18%-16.55% Expected dividend yield 0.00 % 0.00 % Weighted average grant date fair value $ 3.75 $ 1.65 The following table discloses the activity in shares subject to options and the weighted average exercise prices, in actual dollars, for the three months ended March 31, 2018: BYB Plan Number of Shares Weighted Average Exercise Price Intrinsic Value Weighted Average Remaining Contractual Term (in Years) Beginning balance 1,783,020 $ 11.91 $ 19,718 7.6 Granted — Expired — Exercised (86,750 ) 11.59 $ 949 Forfeited — Ending balance outstanding at March 31, 2018 1,696,270 $ 11.93 $ 18,663 7.4 Exercisable at March 31, 2018 1,217,507 $ 11.50 $ 13,917 7.3 A total of 86,750 stock options were exercised during the three months ended March 31, 2018. During the three months ended March 31, 2018, proceeds from the exercise of stock options were $1.0 million and related tax benefit was $264,000. There were no stock options exercised during the year ended December 31, 2017. No stock options vested during the three months ended March 31, 2018. The Company recognizes share-based compensation based on the estimated fair value of the option at the grant date. Forfeitures are estimated based upon industry standards. Share-based compensation expense is included in non-interest expense in the Consolidated Statements of Operations. The following table summarizes stock option compensation expense for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Total share-based compensation - stock options $ 229 $ 286 Income tax benefit 64 113 Unrecognized compensation expense 499 1,466 Weighted-average amortization period remaining 1.1 years 1.8 years

Earnings per Share

Earnings per Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings per Share	Note 19—Earnings per Share A reconciliation of the numerators and denominators for earnings per common share computations is presented below. Incremental shares represent outstanding stock options for which the exercise price is less than the average market price of the Company’s common stock during the periods presented. Options to purchase 1,696,270 and 1,798,320 shares of common stock were outstanding as of March 31, 2018 and 2017, respectively. There were 70,798 restricted stock awards outstanding at March 31, 2018. There were no restricted stock awards outstanding at March 31, 2017. The following represent the calculation of basic and diluted earnings per share for the periods presented: Three Months Ended March 31, 2018 2017 Net income $ 6,768 $ 6,560 Less: Dividends on preferred shares 193 189 Net income available to common stockholders $ 6,575 $ 6,371 Weighted-average common stock outstanding: Weighted-average common stock outstanding (basic) 29,291,179 24,616,706 Incremental shares 622,454 461,721 Weighted-average common stock outstanding (dilutive) 29,913,633 25,078,427 Basic earnings per common share $ 0.22 $ 0.26 Diluted earnings per common share $ 0.22 $ 0.25

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Stockholders' Equity	Note 20—Stockholders’ Equity A summary of the Company’s preferred and common stock at March 31, 2018 and December 31, 2017 is as follows: March 31, December 31, 2018 2017 Series B 7.5% fixed non-cumulative perpetual preferred stock Par value $ 0.01 $ 0.01 Shares authorized 50,000 50,000 Shares issued 10,438 10,438 Subscription receivable — — Shares outstanding 10,438 10,438 Common stock, voting Par value $ 0.01 $ 0.01 Shares authorized 150,000,000 150,000,000 Shares issued 29,404,048 29,317,298 Shares outstanding 29,404,048 29,317,298 During 2016, the Company authorized and issued Series B 7.50% fixed-to-floating non-voting, noncumulative perpetual preferred stock with a liquidation preference of $1,000 per share, plus the amount of unpaid dividends, if any, which is redeemable at the Company’s option on or after March 31, 2022. Holders of Series B preferred stock do not have any rights to convert such stock into shares of any other class of capital stock of the Company. For the three months ended March 31, 2018, the Company declared and paid dividends on the Series B preferred stock of $193,000, compared to $189,000 for the three months ended March 31, 2017.

Consolidated Statements of Ch28

Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)	Note 21—Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) for the Three Months Ended March 31, 2018 and March 31, 2017 (dollars in thousands) Unrealized Gains (Losses) on Cash Flow Hedges Unrealized (Losses) on Available-for -Sale Securities Total Accumulated Other Comprehensive Income (Loss) Balance, January 1, 2017 $ 2,233 $ (9,501 ) $ (7,268 ) Other comprehensive income (loss), net of tax (18 ) 386 368 Balance, March 31, 2017 $ 2,215 $ (9,115 ) $ (6,900 ) Balance, January 1, 2018 $ 2,913 $ (8,000 ) $ (5,087 ) Reclassification of certain income tax effects from accumulated other comprehensive income 687 (1,450 ) (763 ) Other comprehensive income (loss), net of tax 2,893 (6,457 ) (3,564 ) Balance, March 31, 2018 $ 6,493 $ (15,907 ) $ (9,414 )

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	These unaudited interim condensed consolidated financial statements include the accounts of Byline Illinois state chartered These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). In preparing these financial statements, the Company has evaluated events and transactions subsequent to March 31, 2018 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information in footnote disclosures normally included in financial statements prepared in accordance with GAAP has been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Consolidated Financial Statements for the years ended December 31, 2017, 2016, and 2015. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s management has evaluated subsequent events for potential recognition or disclosure through the date of the issuance of these consolidated financial statements. No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements. Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity. During the three months ended March 31, 2018, we revised our previously issued 2017 consolidated financial statements to properly record a deferred tax liability associated with the bad debt recapture assumed from the acquisition of Ridgestone Financial Services, Inc. (“Ridgestone”) and its subsidiaries on October 14, 2016. The acquisition of Ridgestone was accounted for using the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair value adjustments associated with this transaction were finalized during the fourth quarter of 2017. We evaluated the effect of the error to our previously issued consolidated financial statements in accordance with Securities and Exchange Commission Staff Accounting Bulletin No. 99 and No. 108, and, based upon quantitative and qualitative factors, determined that the error was not material to our previously issued consolidated financial statements. Accordingly, we have reflected the change in 2017 and revised our Consolidated Statements of Financial Condition disclosed herein. Consolidated financial statements for periods not presented herein will be revised, as applicable, as they are included in future filings. All financial information presented in the accompanying notes to these consolidated financial statements was revised to reflect the change. The change did not affect net income or stockholders’ equity for the periods impacted. The following table presents the effect of the aforementioned revisions to our Consolidated Statements of Financial Condition as of December 31, 2017: December 31, 2017 (dollars in thousands) As Reported Adjustment As Revised Goodwill $ 51,975 $ 2,587 $ 54,562 Deferred tax assets, net 49,963 (2,587 ) 47,376 Total assets 3,366,130 — 3,366,130
Recently Issued Accounting Pronouncements	The following reflect recent accounting pronouncements that have been adopted or are pending adoption by the Company. As the Company qualifies as an emerging growth company and has elected the extended transition period for complying with new or revised accounting pronouncements, it is not subject to new or revised accounting standards applicable to public companies during the extended transition period. The accounting pronouncements pending adoption below reflect effective dates for the Company as an emerging growth company with the extended transition period. Revenue from Contracts with Customers In May 2014, FASB issued Accounting Standards Update (“ASU”) No. 2014-09, deferred by ASU No. 2015-14 and clarifying standards, Revenue from Contracts with Customers , which creates Topics 606 and 610 and supersedes Topic 605, Revenue Recognition . The core principle of Topic 606 is that an entity recognizes 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. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. Under the terms of ASU No. 2015-14 the standard is effective for interim and annual periods beginning after December 15, 2017. Early application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company is currently evaluating the provisions of ASU No. 2014-09 to determine the potential impact the standard will have on the Company’s Consolidated Financial Statements. As a financial institution, the Company’s largest component of revenue, interest income, is excluded from the scope of this ASU. The Company is currently evaluating which, if any, of its sources of non-interest income will be impacted by this ASU. Assuming the Company remains an emerging growth company, the Company expects to adopt this new guidance on January 1, 2019, with a cumulative effect adjustment to opening retained earnings, if such adjustment is deemed to be significant. In April 2016, FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing . The amendments in this ASU do not change the core principle of the guidance in Topic 606. Rather, the amendments in this ASU clarify the following two aspects of Topic 606: (1) identifying performance obligations and (2) licensing implementation guidance, while retaining the related principles for those areas. The amendments in this ASU affect the guidance in ASU 2014-09, discussed above, which is not yet effective. The effective date and transition requirements for the amendments in this ASU are the same as the effective date and transition requirements in Topic 606, Revenues from Contracts with Customers . The Company is evaluating the provisions of this ASU in conjunction with ASU No. 2014-09 to determine the potential impact Topic 606 and its amendments will have on the Company’s Consolidated Financial Statements. In May 2016, FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients Revenue from Contracts with Customers In November 2017, FASB issued ASU No. 2017-14, amending ASC Topic 606, Revenue from Contracts with Customers Revenue from Contracts with Customers Recognition and Measurement of Financial Assets and Financial Liabilities Recognition and Measurement of Financial Assets and Financial Liabilities In March 2018, FASB issued ASU No. 2018-03, Recognition and Measurement of Financial Assets and Financial Liabilities Leases (Topic 842) In February 2016, FASB issued ASU No. 2016-02, Leases . The amendments in this ASU require lessees to recognize the following for all leases (with the exception of short-term) at the commencement date; a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The amendments in this ASU leave lessor accounting largely unchanged, although certain targeted improvements were made to align lessor accounting with the lessee accounting model. This ASU simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company expects an increase in assets and liabilities as a result of recognizing additional lease contracts where the Company is a lessee. Derivatives and Hedging (Topic 815) In August 2017, FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities . The amendments in this ASU better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The new authoritative guidance will be effective for reporting periods after January 1, 2019 with early adoption permitted. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Compensation—Stock Compensation (Topic 718) In March 2016, FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting . FASB issued this ASU as part of its Simplification Initiative. The areas for simplification in this ASU involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Amendments in this ASU relate to the timing of when excess tax benefits are recognized, minimum statutory withholding requirements, forfeitures, and intrinsic value should be applied using a modified retrospective transition method by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is adopted. Amendments related to the presentation of employee taxes paid on the statement of cash flows when an employer withholds shares to meet the minimum statutory withholding requirement should be applied retrospectively. Amendments in this ASU require recognition of excess tax benefits and tax deficiencies in the income statement and the practical expedient for estimating expected term should be applied prospectively. An entity may elect to apply the amendments in this ASU related to the presentation of excess tax benefits on the statement of cash flows using either a prospective transition method or a retrospective transition method. The amendments in this ASU are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. This ASU became effective for the Company on January 1, 2017 and did not have a material impact on the Company’s Consolidated Financial Statements. In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting Financial Instruments—Credit Losses (Topic 326) In June 2016, FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments . Current GAAP requires an “incurred loss” methodology for recognizing credit losses that delays recognition until it is probable a loss has been incurred. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this ASU replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this ASU require a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit loss, which will be more decision useful to users of the financial statements. The amendments in this ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2021. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. While the Company has not quantified the impact of this ASU, it does expect changing from the current incurred loss model to an expected loss model will result in an earlier recognition of losses. Statement of Cash Flows (Topic 230) In August 2016, FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments . There is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230 and other Topics. This ASU addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. Those eight issues are (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions, and (8) separately identifiable cash flows and application of the predominance principle. Current GAAP either is unclear or does not include specific guidance on these eight cash flow classification issues. These amendments provide guidance for each of the eight issues, thereby reducing current and potential future diversity in practice. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company is currently evaluating the provisions of ASU No. 2016-15 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (230), Restricted Cash Income Taxes (Topic 740) In October 2016, the FASB issued ASU No. 2016-16, Income Taxes, Intra-Entity Transfers of Assets Other Than Inventory . The ASU was issued to improve the accounting for income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party; this update clarifies that an entity should recognize the income tax consequences of an intra-entity transfer of assets other than inventory when the transfer occurs. The amendment is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption of the update is permitted. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company does not expect this ASU to have a material impact on the Company’s Consolidated Financial Statements. Business Combinations (Topic 805) In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business . The guidance clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. This guidance is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company does not expect a material impact of this ASU on the Company’s Consolidated Financial Statements. Intangibles—Goodwill and Other (Topic 350) In January 2017, FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment . The amendments in this ASU are intended to reduce the cost and complexity of the goodwill impairment test by eliminating step two from the impairment test. The amendments modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. Under the amendments in this ASU, an entity will perform its annual, or interim, goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount. An impairment charge should be recognized for the amount which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The amendments in this ASU are effective for the Company’s annual or any interim goodwill impairment test in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company early adopted these amendments in 2017, which did not have a material impact on the Company’s Consolidated Financial Statements. Other Income (Subtopic 610-20) In February 2017, the FASB issued ASU No. 2017-05, Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets . This ASU will clarify the scope of Subtopic 610-20 and add guidance for partial sales of nonfinancial assets. The amendments should be applied either on retrospectively to each period presented or with a modified retrospective approach. The amendment is effective for annual periods beginning after December 15, 2018, and interim periods within annual periods beginning after December 15, 2019. The Company is currently evaluating the provisions of ASU No. 2017-05 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. Nonrefundable Fees and Other Costs (Subtopic 310-20) In March 2017, FASB issued ASU No. 2017-08, Receivables—Nonrefundable Fees and Other Costs. The amendments in the ASU shorten the amortization period for certain callable debt securities held at a premium at the earliest call date. Under current GAAP, the Company amortizes the premium as an adjustment of yield over the contractual life of the instrument. As a result, upon exercise of a call on a callable debt security held at a premium, the unamortized premium is charged to earnings. The ASU shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. However, the amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company is required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017-08 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815) In July 2017, FASB issued ASU No. 2017-11, (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception . The ASU simplifies the accounting for certain financial instruments with down round features, a provision in an equity-linked financial instrument (or embedded feature) that provides a downward adjustment of the current exercise price based on the price of future equity offerings. Down round features are common in warrants, convertible preferred shares, and convertible debt instruments. The ASU requires companies to disregard the down round feature when assessing whether the instrument is indexed to its own stock, for purposes of determining liability or equity classification. Companies that provide earnings per share (EPS) data will adjust their basic EPS calculation for the effect of the feature when triggered (i.e., when the exercise price of the related equity-linked financial instrument is adjusted downward because of the down round feature) and will also recognize the effect of the trigger within equity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017‑11 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements. Income Statement—Reporting Comprehensive Income (Topic 220) In February 2018, FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The ASU helps organizations address certain stranded income tax effects in accumulated other comprehensive income (AOCI) resulting from the Tax Cuts and Jobs Act. The ASU provides reporting entities with an option to reclassify stranded tax effects within AOCI to retained earnings in 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 (or portion thereof) is recorded. The ASU requires reporting entities to disclose: a description of the accounting policy for releasing income tax effects from AOCI; whether they elect to reclassify the stranded income tax effects from the Tax Cuts and Jobs Act; and information about the other income tax effects that are reclassified. The amendments affect any organization that is required to apply the provisions of Topic 220, Income Statement—Reporting Comprehensive Income , and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP. The amendments are effective for annual periods beginning after December 15, 2018, and interim periods within those fiscal years. The Company early adopted the new guidance on January 1, 2018. The adoption did not impact the Company’s Statements of Operations, and resulted in a reclassification of $763,000 from accumulated other comprehensive income to retained earnings. Financial Services—Depository and Lending (Topic 942) In May 2018, FASB issued ASU No. 2018-06, Codification Improvements to Topic 942, Depository and Lending — Income Taxes . The amendments in this ASU supersede the guidance within Subtopic 942-741 that has been rescinded by the OCC and no longer relevant. A cross-reference between Subtopic 740-30, Income Taxes—Other Considerations or Special Areas, and Subtopic 942-740 is being added to the remaining guidance in Subtopic 740-30 to improve the usefulness of the codification. The amendments in this Update are effective upon issuance, as no accounting requirements are affected. The amendments in this ASU do not have a material impact on the Company’s Consolidated Financial Statements.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Aforementioned Revisions to Consolidated Statements of Financial Condition	The following table presents the effect of the aforementioned revisions to our Consolidated Statements of Financial Condition as of December 31, 2017: December 31, 2017 (dollars in thousands) As Reported Adjustment As Revised Goodwill $ 51,975 $ 2,587 $ 54,562 Deferred tax assets, net 49,963 (2,587 ) 47,376 Total assets 3,366,130 — 3,366,130

Acquisition of a Business (Tabl

Acquisition of a Business (Tables)	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Summary of Estimates of fair Values of Assets and Liabilities Assumed as of Acquisition Date	The following table presents a summary of the estimates of fair values of assets acquired and liabilities assumed as of the acquisition date: Assets Cash and cash equivalents $ 25,480 Securities available-for-sale 27,662 Restricted stock 931 Loans held for sale 15,363 Loans 351,820 Servicing assets 20,295 Premises and equipment 2,011 Other real estate owned 1,525 Other intangible assets 486 Bank-owned life insurance 2,352 Other assets 5,641 Total assets acquired 453,566 Liabilities Deposits 361,370 Federal Home Loan Bank advances 9,773 Junior subordinated debentures 1,339 Accrued expenses and other liabilities 4,958 Total liabilities assumed 377,440 Net assets acquired $ 76,126 Consideration paid Common stock (4,199,791 shares issued at $16.25 per share) 68,247 Cash paid 36,753 Total consideration paid 105,000 Goodwill $ 28,874
Summary of Acquired Non-Impaired Loans as of Acquisition Date	The following table presents the acquired non-impaired loans as of the acquisition date: Fair value $ 312,166 Gross contractual amounts receivable 450,292 Estimate of contractual cash flows not expected to be collected (1) 19,661 Estimate of contractual cash flows expected to be collected 430,631 (1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.
Summary of Pro Forma Information for Results of Operations

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost and Fair Values of Securities Available-for-sale and Held to Maturity	The following March 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available-for-sale U.S. Treasury Notes $ 22,934 $ 2 $ (195 ) $ 22,741 U.S. Government agencies 64,293 46 (1,718 ) 62,621 Obligations of states, municipalities, and political subdivisions 32,876 21 (749 ) 32,148 Residential mortgage-backed securities Agency 321,957 — (12,907 ) 309,050 Non-agency 55,341 — (1,067 ) 54,274 Commercial mortgage-backed securities Agency 76,866 76 (2,815 ) 74,127 Non-agency 31,688 — (1,344 ) 30,344 Corporate securities 35,257 315 (209 ) 35,363 Other securities 3,628 1,875 (114 ) 5,389 Total $ 644,840 $ 2,335 $ (21,118 ) $ 626,057 March 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Held-to-maturity Obligations of states, municipalities, and political subdivisions $ 23,982 $ 44 $ (335 ) $ 23,691 Residential mortgage-backed securities Agency 49,946 — (822 ) 49,124 Non-agency 38,338 — (734 ) 37,604 Total $ 112,266 $ 44 $ (1,891 ) $ 110,419 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available-for-sale U.S. Treasury Notes $ 14,999 $ — $ (136 ) $ 14,863 U.S. Government agencies 54,248 — (1,290 ) 52,958 Obligations of states, municipalities, and political subdivisions 33,405 100 (335 ) 33,170 Residential mortgage-backed securities Agency 315,103 — (7,646 ) 307,457 Non-agency 39,485 104 (75 ) 39,514 Commercial mortgage-backed securities Agency 70,964 45 (1,966 ) 69,043 Non-agency 31,763 — (792 ) 30,971 Corporate securities 29,573 507 (104 ) 29,976 Other securities 3,627 1,730 (73 ) 5,284 Total $ 593,167 $ 2,486 $ (12,417 ) $ 583,236 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Held-to-maturity Obligations of states, municipalities, and political subdivisions $ 24,030 $ 197 $ (82 ) $ 24,145 Residential mortgage-backed securities Agency 53,731 79 (203 ) 53,607 Non-agency 39,402 174 (51 ) 39,525 Total $ 117,163 $ 450 $ (336 ) $ 117,277
Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Available-for-sale and Held to Maturity	Gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2018 and December 31, 2017 are summarized as follows: Less than 12 Months 12 Months or Longer Total March 31, 2018 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale U.S. Treasury Notes 6 $ 9,954 $ (12 ) $ 9,817 $ (183 ) $ 19,771 $ (195 ) U.S. Government agencies 9 989 (10 ) 51,558 (1,708 ) 52,547 (1,718 ) Obligations of states, municipalities and political subdivisions 36 22,418 (475 ) 4,374 (274 ) 26,792 (749 ) Residential mortgage-backed securities Agency 43 33,601 (598 ) 275,450 (12,309 ) 309,051 (12,907 ) Non-agency 6 49,937 (885 ) 4,337 (182 ) 54,274 (1,067 ) Commercial mortgage-backed securities Agency 8 7,228 (24 ) 55,306 (2,791 ) 62,534 (2,815 ) Non-agency 5 — — 30,344 (1,344 ) 30,344 (1,344 ) Corporate securities 6 8,438 (131 ) 2,434 (78 ) 10,872 (209 ) Other securities 1 — — 1,880 (114 ) 1,880 (114 ) Total 120 $ 132,565 $ (2,135 ) $ 435,500 $ (18,983 ) $ 568,065 $ (21,118 ) Less than 12 Months 12 Months or Longer Total March 31, 2018 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Held-to-maturity Obligations of states, municipalities, and political subdivisions 24 $ 15,870 $ (286 ) $ 1,539 $ (49 ) $ 17,409 $ (335 ) Residential mortgage-backed securities Agency 20 42,065 (572 ) 7,060 (250 ) 49,125 (822 ) Non-agency 7 33,441 (591 ) 4,162 (143 ) 37,603 (734 ) Total 51 $ 91,376 $ (1,449 ) $ 12,761 $ (442 ) $ 104,137 $ (1,891 ) Less than 12 Months 12 Months or Longer Total December 31, 2017 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale U.S. Treasury Notes 5 $ 4,998 $ (2 ) $ 9,865 $ (134 ) $ 14,863 $ (136 ) U.S. Government agencies 9 992 (7 ) 51,966 (1,283 ) 52,958 (1,290 ) Obligations of states, municipalities and political subdivisions 29 16,059 (137 ) 4,453 (198 ) 20,512 (335 ) Residential mortgage-backed securities Agency 41 15,441 (181 ) 292,016 (7,465 ) 307,457 (7,646 ) Non-agency 1 — — 4,565 (75 ) 4,565 (75 ) Commercial mortgage-backed securities Agency 7 — — 57,442 (1,966 ) 57,442 (1,966 ) Non-agency 5 — — 30,971 (792 ) 30,971 (792 ) Corporate securities 3 2,406 (80 ) 2,489 (24 ) 4,895 (104 ) Other securities 1 — — 1,921 (73 ) 1,921 (73 ) Total 101 $ 39,896 $ (407 ) $ 455,688 $ (12,010 ) $ 495,584 $ (12,417 ) Less than 12 Months 12 Months or Longer Total December 31, 2017 # of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Held-to-maturity Obligations of states, municipalities, and political subdivisions 12 $ 7,409 $ (38 ) $ 1,548 $ (44 ) $ 8,957 $ (82 ) Residential mortgage-backed securities Agency 13 24,344 (107 ) 7,935 (96 ) 32,279 (203 ) Non-agency 3 10,458 (10 ) 4,382 (41 ) 14,840 (51 ) Total 28 $ 42,211 $ (155 ) $ 13,865 $ (181 ) $ 56,076 $ (336 )
Summary of Proceeds From Sales of Securities Available-for-sale and Associated Gains and Losses	The proceeds three months ended March 31, 2018 For the Three Months Ended March 31, 2018 2017 Proceeds $ — $ 8 Gross gains — 8 Gross losses — —
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	At March 31, 2018, the Amortized Cost Fair Value Available-for-sale Due in one year or less $ 5,695 $ 5,689 Due from one to five years 88,763 87,589 Due from five to ten years 47,396 46,274 Due after ten years 14,042 14,013 Mortgage-backed securities 485,852 467,795 Other securities with no defined maturity 3,092 4,697 Total $ 644,840 $ 626,057 Held-to-maturity Due from one to five years $ 3,523 $ 3,500 Due from five to ten years 11,706 11,523 Due after ten years 8,753 8,668 Mortgage-backed securities 88,284 86,728 Total $ 112,266 $ 110,419

Loan and Lease Receivables (Tab

Loan and Lease Receivables (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Schedule of Outstanding Loan and Lease Receivables	Outstanding loan and lease receivables as of the dates shown were categorized as follows: March 31, December 31, 2018 2017 Commercial real estate $ 840,958 $ 891,971 Residential real estate 568,030 577,123 Construction, land development, and other land 117,597 105,996 Commercial and industrial 569,647 522,254 Installment and other 4,082 4,182 Lease financing receivables 177,932 174,165 Total loans and leases 2,278,246 2,275,691 Net unamortized deferred fees and costs (1,357 ) (1,720 ) Initial direct costs 3,529 3,521 Allowance for loan and lease losses (17,640 ) (16,706 ) Net loans and leases $ 2,262,778 $ 2,260,786 March 31, December 31, 2018 2017 Lease financing receivables Net minimum lease payments $ 193,146 $ 188,986 Unguaranteed residual values 1,613 1,644 Unearned income (16,827 ) (16,465 ) Total lease financing receivables 177,932 174,165 Initial direct costs 3,529 3,521 Lease financial receivables before allowance for lease losses $ 181,461 $ 177,686
Summary of Minimum Annual Lease Payments for Lease Financing Receivables	The minimum Minimum Lease Payments 2018 $ 51,913 2019 58,980 2020 42,897 2021 25,541 2022 12,131 Thereafter 1,684 Total $ 193,146
Summary of Balances for Each Respective Loan and Lease Category	The following March 31, 2018 Originated Acquired Impaired Acquired Non- Impaired Total Commercial real estate $ 485,324 $ 157,956 $ 197,589 $ 840,869 Residential real estate 397,516 139,858 30,785 568,159 Construction, land development, and other land 110,092 5,156 1,822 117,070 Commercial and industrial 470,689 8,055 89,985 568,729 Installment and other 3,645 449 36 4,130 Lease financing receivables 151,468 — 29,993 181,461 Total loans and leases $ 1,618,734 $ 311,474 $ 350,210 $ 2,280,418 December 31, 2017 Originated Acquired Impaired Acquired Non- Impaired Total Commercial real estate $ 513,622 $ 166,712 $ 211,359 $ 891,693 Residential real estate 400,571 144,562 32,085 577,218 Construction, land development, and other land 97,638 5,946 1,845 105,429 Commercial and industrial 416,499 10,008 94,731 521,238 Installment and other 3,724 462 42 4,228 Lease financing receivables 141,329 — 36,357 177,686 Total loans and leases $ 1,573,383 $ 327,690 $ 376,419 $ 2,277,492
Summary of Outstanding Balance and Carrying Amount of All Acquired Impaired Loans	The outstanding March 31, 2018 December 31, 2017 Outstanding Balance Carrying Value Outstanding Balance Carrying Value Commercial real estate $ 227,322 $ 157,956 $ 235,898 $ 166,712 Residential real estate 200,524 139,858 207,660 144,562 Construction, land development, and other land 13,108 5,156 13,270 5,946 Commercial and industrial 16,079 8,055 18,333 10,008 Installment and other 1,796 449 1,819 462 Total acquired impaired loans $ 458,829 $ 311,474 $ 476,980 $ 327,690
Summary of Changes in Accretable Yield for Acquired Impaired Loans	The following table summarizes the changes in accretable yield for acquired impaired loans for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Beginning balance $ 36,446 $ 36,868 Accretion to interest income (5,691 ) (5,684 ) Reclassification from nonaccretable difference, net 8,545 3,560 Ending balance $ 39,300 $ 34,744
Schedule of Unpaid Principal Balance and Carrying Value for Acquired Non-Impaired Loans and Leases	Acquired non-impaired loans and leases —The unpaid principal balance and carrying value for acquired non-impaired loans and leases at March 31, 2018 and December 31, 2017 were as follows: March 31, 2018 December 31, 2017 Unpaid Principal Balance Carrying Value Unpaid Principal Balance Carrying Value Commercial real estate $ 203,539 $ 197,589 $ 221,710 $ 211,359 Residential real estate 31,291 30,785 32,605 32,085 Construction, land development, and other land 1,881 1,822 1,926 1,845 Commercial and industrial 100,894 89,985 105,529 94,731 Installment and other 350 36 355 42 Lease financing receivables 31,227 29,993 37,476 36,357 Total acquired non-impaired loans and leases $ 369,182 $ 350,210 $ 399,601 $ 376,419

Allowance for Loan and Lease 34

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Summary of Allowance for Loan and Lease Losses and Corresponding Loan and Lease Balances	The following March 31, 2018 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Allowance for loan and lease losses Three months ended Beginning balance $ 4,794 $ 1,638 $ 222 $ 7,418 $ 41 $ 2,593 $ 16,706 Provisions (releases) 934 (74 ) 397 3,424 20 414 5,115 Charge-offs (409 ) — (418 ) (3,085 ) — (510 ) (4,422 ) Recoveries — — — 6 — 235 241 Ending balance $ 5,319 $ 1,564 $ 201 $ 7,763 $ 61 $ 2,732 $ 17,640 Ending balance: Individually evaluated for impairment $ 1,572 $ 153 $ — $ 2,963 $ 14 $ — $ 4,702 Collectively evaluated for impairment 1,827 1,036 177 3,626 11 2,732 9,409 Loans acquired with deteriorated credit quality 1,920 375 24 1,174 36 — 3,529 Total allowance for loan and lease losses $ 5,319 $ 1,564 $ 201 $ 7,763 $ 61 $ 2,732 $ 17,640 March 31, 2018 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Loans and leases ending balance: Individually evaluated for impairment $ 12,375 $ 2,029 $ — $ 12,598 $ 14 $ — $ 27,016 Collectively evaluated for impairment 670,538 426,272 111,914 548,076 3,667 181,461 1,941,928 Loans acquired with deteriorated credit quality 157,956 139,858 5,156 8,055 449 — 311,474 Total loans and leases $ 840,869 $ 568,159 $ 117,070 $ 568,729 $ 4,130 $ 181,461 $ 2,280,418 March 31, 2017 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Allowance for loan and lease losses Three months ended Beginning balance $ 1,945 $ 2,483 $ 742 $ 4,196 $ 334 $ 1,223 $ 10,923 Provisions (releases) 340 1 (325 ) 855 (3 ) 1,023 1,891 Charge-offs (238 ) (67 ) — (215 ) — (770 ) (1,290 ) Recoveries — — — — — 293 293 Ending balance $ 2,047 $ 2,417 $ 417 $ 4,836 $ 331 $ 1,769 $ 11,817 Ending balance: Individually evaluated for impairment $ — $ 282 $ 26 $ 966 $ 325 $ — $ 1,599 Collectively evaluated for impairment 1,622 1,470 391 3,210 5 1,769 8,467 Loans acquired with deteriorated credit quality 425 665 — 660 1 — 1,751 Total allowance for loan and lease losses $ 2,047 $ 2,417 $ 417 $ 4,836 $ 331 $ 1,769 $ 11,817 March 31, 2017 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Loans and leases ending balance: Individually evaluated for impairment $ 9,764 $ 1,262 $ 85 $ 3,317 $ 327 $ — $ 14,755 Collectively evaluated for impairment 611,397 430,469 99,114 432,036 2,054 162,675 1,737,745 Loans acquired with deteriorated credit quality 201,689 169,676 6,116 13,114 439 — 391,034 Total loans and leases $ 822,850 $ 601,407 $ 105,315 $ 448,467 $ 2,820 $ 162,675 $ 2,143,534
Summary of Recorded Investment, Unpaid Principal Balance, and Related Allowance for Loans and Leases Considered Impaired	The following and March 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded Commercial real estate $ 6,151 $ 7,116 $ — Residential real estate 1,682 1,653 — Commercial and industrial 6,441 7,678 — With an allowance recorded Commercial real estate 6,224 7,684 1,572 Residential real estate 347 345 153 Commercial and industrial 6,157 9,160 2,963 Installment and other 14 14 14 Total impaired loans $ 27,016 $ 33,650 $ 4,702 December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded Commercial real estate $ 11,425 $ 12,936 $ — Residential real estate 2,075 2,046 — Commercial and industrial 5,470 6,774 — With an allowance recorded Commercial real estate 2,459 2,634 1,101 Residential real estate 354 351 158 Commercial and industrial 9,314 9,724 2,692 Installment and other 14 14 14 Total impaired loans $ 31,111 $ 34,479 $ 3,965
Summary of Average Recorded Investment and Interest Income Recognized for Loans and Leases Considered Impaired	The following tables summarize the average recorded investment and interest income recognized for loans and leases considered impaired, which excludes acquired impaired loans, for the periods ended as follows: March 31, 2018 Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial real estate $ 9,039 $ 103 Residential real estate 1,930 10 Commercial and industrial 7,300 62 With an allowance recorded Commercial real estate 4,122 37 Residential real estate 351 1 Commercial and industrial 6,975 102 Installment and other 14 — Total impaired loans $ 29,731 $ 315 March 31, 2017 Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial real estate $ 9,798 $ 130 Residential real estate 787 7 Commercial and industrial 1,402 60 With an allowance recorded Residential real estate 488 1 Construction, land development and other land 86 6 Commercial and industrial 1,881 3 Installment and other 328 4 Total impaired loans $ 14,770 $ 211
Summary of Risk Rating Categories of Loans and Leases Considered for Inclusion in Allowance for Loan and Lease Losses Calculation	The following March 31, 2018 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Pass $ 593,209 $ 393,416 $ 85,634 $ 465,449 $ 3,648 $ 178,759 $ 1,720,115 Watch 65,816 29,875 23,127 64,914 2 159 183,893 Special Mention 10,665 2,573 3,153 12,272 17 1,092 29,772 Substandard 13,223 2,437 — 18,039 14 1,162 34,875 Doubtful — — — — — 289 289 Loss — — — — — — — Total $ 682,913 $ 428,301 $ 111,914 $ 560,674 $ 3,681 $ 181,461 $ 1,968,944 December 31, 2017 Commercial Real Estate Residential Real Estate Construction, Land Development, and Other Land Commercial and Industrial Installment and Other Lease Financing Receivables Total Pass $ 638,066 $ 398,743 $ 73,935 $ 415,163 $ 3,732 $ 174,672 $ 1,704,311 Watch 58,217 29,165 22,380 67,024 20 190 176,996 Special Mention 14,645 2,251 3,168 13,535 — 1,293 34,892 Substandard 14,053 2,497 — 15,508 14 1,259 33,331 Doubtful — — — — — 272 272 Loss — — — — — — — Total $ 724,981 $ 432,656 $ 99,483 $ 511,230 $ 3,766 $ 177,686 $ 1,949,802
Summary of Contractual Delinquency Information	The following tables summarize contractual delinquency information for acquired non-impaired and originated loans and leases by category at March 31, 2018 and December 31, 2017: March 31, 2018 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days and Accruing Non- accrual Total Past Due Current Total Commercial real estate $ 9,266 $ — $ — $ 8,194 $ 17,460 $ 665,453 $ 682,913 Residential real estate 79 — — 1,848 1,927 426,374 428,301 Construction, land development, and other land — — — — — 111,914 111,914 Commercial and industrial 10,064 1,704 — 12,916 24,684 535,990 560,674 Installment and other 17 — — 14 31 3,650 3,681 Lease financing receivables 1,282 377 — 654 2,313 179,148 181,461 Total $ 20,708 $ 2,081 $ — $ 23,626 $ 46,415 $ 1,922,529 $ 1,968,944 December 31, 2017 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days and Accruing Non- accrual Total Past Due Current Total Commercial real estate $ 4,783 $ 968 $ — $ 8,459 $ 14,210 $ 710,771 $ 724,981 Residential real estate 148 — — 2,092 2,240 430,416 432,656 Construction, land development, and other land — — — — — 99,483 99,483 Commercial and industrial 6,667 967 — 4,348 11,982 499,248 511,230 Installment and other 18 — — 14 32 3,734 3,766 Lease financing receivables 997 638 — 851 2,486 175,200 177,686 Total $ 12,613 $ 2,573 $ — $ 15,764 $ 30,950 $ 1,918,852 $ 1,949,802

Servicing Assets (Tables)

Servicing Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Transfers And Servicing [Abstract]
Activity for Servicing Assets and Related Changes in Fair Value	Activity for the three months ended March 31, 2018 is Three Months Ended March 31, 2018 2017 Beginning balance $ 21,400 $ 21,091 Additions, net 2,102 1,422 Changes in fair value (1,887 ) (1,290 ) Ending balance $ 21,615 $ 21,223
Unpaid Principal Balances of Loans Serviced for Others	The unpaid as of March 31, 2018 and December 31, 2017: March 31, December 31, 2018 2017 Loan portfolios serviced for: SBA guaranteed loans 1,066,269 1,021,143 USDA guaranteed loans 93,650 91,758 Total $ 1,159,919 $ 1,112,901

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2018
Banking And Thrift [Abstract]
Change in Other Real Estate Owned	The following table presents the change in other real estate owned (“OREO”) for the three months ended March 31, 2018 and 2017. Three Months Ended March 31, 2018 2017 Beginning balance $ 10,626 $ 16,570 Net additions to OREO 1,044 808 Dispositions of OREO (1,123 ) (3,929 ) Valuation adjustments (81 ) (276 ) Ending balance $ 10,466 $ 13,173

Goodwill, Core Deposit Intang37

Goodwill, Core Deposit Intangible and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Changes in Goodwill and Core Deposit Intangible Assets	The following table summarizes the changes in the Company’s goodwill and core deposit intangible assets for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Goodwill Core Intangible Goodwill Core Deposit Intangible Beginning balance $ 54,562 $ 16,720 $ 51,975 $ 19,776 Amortization or accretion — (761 ) — (765 ) Ending balance $ 54,562 $ 15,959 $ 51,975 $ 19,011 Accumulated amortization or accretion N/A $ 14,227 N/A $ 11,175 Weighted average remaining amortization or accretion period N/A 5.4 years N/A 6.4 Years
Estimated Amortization Expense for Core Deposit Intangible and Other Intangible Assets Recognized	The following table presents the estimated amortization expense for core deposit intangible and other intangible assets recognized at March 31, 2018: Estimated Amortization 2018 $ 2,295 2019 3,050 2020 3,027 2021 3,017 2022 3,010 Thereafter 1,592 Total $ 15,991

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2018
Deposits [Abstract]
Schedule of Deposits	The composition of deposits was as follows as of March 31, 2018 and December 31, 2017: March 31, December 31, 2018 2017 Non-interest bearing demand deposits $ 749,892 $ 760,887 Interest bearing checking accounts 196,802 186,611 Money market demand accounts 382,282 349,862 Other savings 439,277 437,212 Time deposits (below $250,000) 665,541 627,255 Time deposits ($250,000 and above) 90,753 81,502 Total deposits $ 2,524,547 $ 2,443,329

Federal Home Loan Bank Advanc39

Federal Home Loan Bank Advances (Tables)	3 Months Ended
	Mar. 31, 2018
Federal Home Loan Banks [Abstract]
Summary of FHLB Advances	The following March 31, December 31, 2018 2017 Federal Home Loan Bank advances $ 380,000 $ 361,506 Weighted average cost 1.88 % 1.49 %

Other Borrowings (Tables)

Other Borrowings (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Summary of Other Borrowings	The following is a summary of the Company’s other borrowings as of March 31, 2018 and December 31, 2017: March 31, December 31, 2018 2017 Securities sold under agreements to repurchase $ 27,815 $ 31,187 Line of credit — — Total $ 27,815 $ 31,187
Summary of Short-term Credit Lines Available for Use	The following March 31, December 31, 2018 2017 Federal Reserve Bank of Chicago discount window line $ 156,077 $ 144,248 Available federal funds lines 55,000 55,000

Junior Subordinated Debentures

Junior Subordinated Debentures (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Junior Subordinated Debentures by Issuance	At March 31, 2018 and December 31, 2017, the Name of Trust Aggregate Principal Amount March 31, 2018 Aggregate Principal Amount December 31, 2017 Stated Maturity Contractual Rate at March 31, 2018 Interest Rate Spread Metropolitan $ 35,000 $ 35,000 March 4.97 % Three-month LIBOR + 2.79% RidgeStone Capital Trust I 1,500 1,500 June 30, 2033 5.09 % Five-year LIBOR + 3.50% Total liability, at par 36,500 36,500 Discount (8,700 ) (8,853 ) Total liability, at carrying value $ 27,800 $ 27,647

Commitments and Contingent Li42

Commitments and Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Minimum Annual Rental Commitments for Operating Leases	The minimum Minimum Commitments 2018 $ 2,307 2019 2,600 2020 2,089 2021 1,809 2022 972 Thereafter 2,073 Total $ 11,850
Summary of Contract or Notional Amount of Outstanding Loan and Lease Commitments	The following March 31, 2018 and December 31, 2017 March 31, December 31, 2018 2017 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to extend credit $ 58,074 $ 510,822 $ 55,924 $ 467,429 Standby letters of credit 2,570 3,538 1,226 3,337 Total $ 60,644 $ 514,360 $ 57,150 $ 470,766

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Company's Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following Fair Value Measurements Using March 31, 2018 Fair Value Level 1 Level 2 Level 3 Financial assets Securities available-for-sale U.S. Treasury Notes $ 22,741 $ 22,741 $ — $ — U.S. Government agencies 62,621 — 62,621 — Obligations of states, municipalities, and political subdivisions 32,148 — 31,773 375 Mortgage-backed securities; residential Agency 309,050 — 309,050 — Non-agency 54,274 — 54,274 — Mortgage-backed securities; commercial Agency 74,127 — 74,127 — Non-agency 30,344 — 30,344 — Corporate securities 35,363 — 35,363 — Other securities 5,389 1,880 2,817 692 Servicing assets 21,615 — — 21,615 Derivative assets 10,500 — 10,500 — Financial liabilities Derivative liabilities 1,432 — 1,430 2 Fair Value Measurements Using December 31, 2017 Fair Value Level 1 Level 2 Level 3 Financial assets Securities available-for-sale U.S. Treasury Notes $ 14,863 $ 14,863 $ — $ — U.S. Government agencies 52,958 — 52,958 — Obligations of states, municipalities, and political subdivisions 33,170 — 32,795 375 Mortgage-backed securities; residential Agency 307,457 — 307,457 — Non-agency 39,514 — 39,514 — Mortgage-backed securities; commercial Agency 69,043 — 69,043 — Non-agency 30,971 — 30,971 — Corporate securities 29,976 — 29,976 — Other securities 5,284 1,921 2,686 677 Servicing assets 21,400 — — 21,400 Derivative assets 5,981 — 5,981 — Financial liabilities Derivative liabilities 994 — 994 —
Summary of Financial Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs	The following table presents additional information about financial assets measured at fair value on recurring basis for which the Company used significant unobservable inputs (Level 3): Three Months Ended March 31, 2018 2017 2018 2017 Investment Securities Servicing Assets Balance, beginning of period $ 1,052 $ 1,080 $ 21,400 $ 21,091 Additions, net — — 2,102 1,422 Amortization 1 1 — — Change in unrealized loss 14 — — — Change in fair value — — (1,887 ) (1,290 ) Balance, end of period $ 1,067 $ 1,081 $ 21,615 $ 21,223
Summary of Unobservable Inputs Used in the Fair Value Measurements on Recurring Basis	The following Financial Instruments Valuation Technique Unobservable Inputs Range of Inputs Weighted Average Range Impact to Valuation from an Increased or Higher Input Value Obligations of states, municipalities, and political obligations Discounted Probability of default 2.2%—2.4% 2.3 % Decrease Single issuer trust preferred Discounted cash flow Probability of default 7.5%—9.9% 8.9 % Decrease Servicing assets Discounted cash flow Prepayment speeds 5.6%—16.3% 9.3 % Decrease Discount rate 10.4%—20.6% 14.2 % Decrease Expected weighted average loan life 0.8—7.9 years 5.5 years Increase
Summary of Company's Assets Measured at Fair Value on a Non-Recurring Basis	The following tables Fair Value Measurements Using March 31, 2018 Fair Value Level 1 Level 2 Level 3 Non-recurring Impaired loans (excluding acquired impaired loans) Commercial real estate $ 10,803 $ — $ — $ 10,803 Residential real estate 1,876 — — 1,876 Construction, land development, and other land — — — — Commercial and industrial 9,635 — — 9,635 Installment and other — — — — Assets held for sale 9,030 — — 9,030 Other real estate owned 10,466 — — 10,466 Fair Value Measurements Using December 31, 2017 Fair Value Level 1 Level 2 Level 3 Non-recurring Impaired loans (excluding acquired impaired loans) Commercial real estate $ 12,783 $ — $ — $ 12,783 Residential real estate 2,271 — — 2,271 Construction, land development, and other land — — — — Commercial and industrial 12,092 — — 12,092 Installment and other — — — — Assets held for sale 9,779 — — 9,779 Other real estate owned 10,626 — — 10,626
Summary of the Valuation Technique, Unobservable Inputs and Qualitative Information About the Company's Assets and Liabilities	The following Financial Instruments Valuation Technique Unobservable Inputs Range of Inputs Impact to Valuation from an Increased or Higher Input Value Impaired loans (excluding acquired impaired loans) Appraisals Appraisal adjustments, sales costs and other discount adjustments for market conditions 6% - 10% Decrease Assets held for sale List price, contract price Sales costs and other discount adjustments for market conditions 7% Decrease Other real estate owned Appraisals Appraisal adjustments, sales costs and other discount adjustments for market conditions 7% - 20% Decrease
Estimated Fair Values of Financial Instruments	The estimated March 31, December 31, Fair Value 2018 2017 Hierarchy Level Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Financial assets Cash and due from banks 1 $ 17,396 $ 17,396 $ 19,404 $ 19,404 Interest bearing deposits with other banks 2 110,645 110,645 38,945 38,945 Securities held-to-maturity 2 112,266 110,419 117,163 117,277 Other restricted stock 2 17,177 17,177 16,343 16,343 Loans held for sale 3 8,219 9,122 5,212 5,851 Loans and lease receivables, net 3 2,262,778 2,230,050 2,260,786 2,240,235 Accrued interest receivable 3 6,971 6,971 7,670 7,670 Financial liabilities Non-interest bearing deposits 2 749,892 749,892 760,887 760,887 Interest bearing deposits 2 1,774,655 1,769,476 1,682,442 1,678,535 Accrued interest payable 2 1,612 1,612 1,306 1,306 Line of credit 2 — — — — Federal Home Loan Bank advances 2 380,000 380,000 361,506 361,500 Securities sold under repurchase agreement 2 27,815 27,815 31,187 31,187 Junior subordinated debentures 3 27,800 34,025 27,647 33,907

Derivative Instruments and He44

Derivative Instruments and Hedge Activities (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Derivative Financial Instruments and Classification on Consolidated Statements of Financial Condition	The following tables present the fair value of the Company’s derivative financial instruments and classification on the Consolidated Statements of Financial Condition as of March 31, 2018 and December 31, 2017: March 31, 2018 December 31, 2017 Fair Value Fair Value Notional Amount Other Assets Other Liabilities Notional Amount Other Assets Other Liabilities Derivatives designated as hedging instruments Interest rate swaps designated as cash flow hedges $ 250,000 $ 9,047 $ — $ 250,000 $ 5,030 $ 38 Derivatives not designated as hedging instruments Other interest rate swaps 94,123 1,453 1,430 94,726 951 956 Other credit derivatives 1,250 — 2 — — — Total derivatives $ 345,373 $ 10,500 $ 1,432 $ 344,726 $ 5,981 $ 994
Summary of Net Gains (Losses) Recorded in Accumulated Other Comprehensive Income (Loss) and Consolidated Statements of Operations Relating to Cash Flow Derivative Instruments	The following table reflects the net gains (losses) recorded in accumulated other comprehensive income (loss) and the Consolidated Statements of Operations relating to the cash flow derivative instruments for the three months ended: March 31, 2018 March 31, 2017 Amount of Gain Recognized in OCI (Effective Portion) Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense Amount of Gain (Loss) Recognized in Other Non-Interest Income (Ineffective Portion) Amount of Gain Recognized in OCI (Effective Portion) Amount of Loss Reclassified from OCI to Income as an Increase to Interest Expense Amount of Gain (Loss) Recognized in Other Non-Interest Income (Ineffective Portion) Interest rate swaps $ 4,070 $ 61 $ — $ (83 ) $ (54 ) $ —
Summary of Other Interest Rate Swaps	The following table reflects other interest rate swaps as of March 31, 2018 Notional amounts $ 94,123 Derivative assets fair value 1,453 Derivative liabilities fair value 1,430 Weighted average pay rates 4.38 % Weighted average receive rates 4.02 % Weighted average maturity 6.0 years
Summary of Company's Interest Rate Derivative and Offsetting Positions	The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative asset and liabilities on the Consolidated Statements of Financial Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of: March 31, 2018 December 31, 2017 Derivative Assets Fair Value Derivative Liabilities Fair Value Derivative Assets Fair Value Derivative Liabilities Fair Value Gross amounts recognized $ 10,500 $ 1,432 $ 5,981 $ 994 Less: Amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition $ 10,500 $ 1,432 $ 5,981 $ 994 Gross amounts not offset in the Consolidated Statements of Financial Condition Offsetting derivative positions — — (232 ) (232 ) Collateral posted (10,500 ) (1,424 ) (5,371 ) (745 ) Net credit exposure (excess collateral) $ — $ 8 $ 378 $ 17

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Stock Compensation Expense	The following table summarizes stock option compensation expense for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Total share-based compensation - stock options $ 229 $ 286 Income tax benefit 64 113 Unrecognized compensation expense 499 1,466 Weighted-average amortization period remaining 1.1 years 1.8 years
Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Stock Compensation Expense	The following table summarizes restricted stock compensation expense for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Total share-based compensation - restricted stock $ 112 $ — Income tax benefit 381 — Unrecognized compensation expense 1,114 — Weighted-average amortization period remaining 2.6 years —
Omnibus Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Changes in Restricted Shares	The following table discloses the changes in restricted shares for the three months ended March 31, 2018: Omnibus Plan Number of Shares Weighted Average Grant Date Fair Value Beginning balance 70,398 $ 20.31 Granted — $ — Vested — $ — Forfeited — $ — Ending balance outstanding at March 31, 2018 70,398 $ 20.31
BYB Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value Assumptions of Stock Options	The fair values of the stock options were determined using the Black-Scholes-Merton model for Time Options and a Monte Carlo simulation model for Performance Options. The fair values of options under the BYB Plan were determined using the following assumptions as of the grant dates: Time Options Grants 2016 2015 Risk-free interest rate 1.34% - 1.40% 1.68% - 1.85% Expected term (years) 5.2 - 5.6 5.7 - 6.3 Expected stock price volatility 20.39 % 16.18%-16.55% Expected dividend yield 0.00 % 0.00 % Weighted average grant date fair value $ 3.55 $ 2.25 Performance Options Grants 2016 2015 Risk-free interest rate Implied forward rates Implied forward rates Expected term (years) Variable Variable Expected stock price volatility 20.34% - 20.39% 16.18%-16.55% Expected dividend yield 0.00 % 0.00 % Weighted average grant date fair value $ 3.75 $ 1.65
Summary of Activity in shares Subjected to Options and Weighted Average Exercise Prices	The following table discloses the activity in shares subject to options and the weighted average exercise prices, in actual dollars, for the three months ended March 31, 2018: BYB Plan Number of Shares Weighted Average Exercise Price Intrinsic Value Weighted Average Remaining Contractual Term (in Years) Beginning balance 1,783,020 $ 11.91 $ 19,718 7.6 Granted — Expired — Exercised (86,750 ) 11.59 $ 949 Forfeited — Ending balance outstanding at March 31, 2018 1,696,270 $ 11.93 $ 18,663 7.4 Exercisable at March 31, 2018 1,217,507 $ 11.50 $ 13,917 7.3

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted Earnings per Share	The following represent the calculation of basic and diluted earnings per share for the periods presented: Three Months Ended March 31, 2018 2017 Net income $ 6,768 $ 6,560 Less: Dividends on preferred shares 193 189 Net income available to common stockholders $ 6,575 $ 6,371 Weighted-average common stock outstanding: Weighted-average common stock outstanding (basic) 29,291,179 24,616,706 Incremental shares 622,454 461,721 Weighted-average common stock outstanding (dilutive) 29,913,633 25,078,427 Basic earnings per common share $ 0.22 $ 0.26 Diluted earnings per common share $ 0.22 $ 0.25

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Summary of Preferred and Common Stock	A summary of the Company’s preferred and common stock at March 31, 2018 and December 31, 2017 is as follows: March 31, December 31, 2018 2017 Series B 7.5% fixed non-cumulative perpetual preferred stock Par value $ 0.01 $ 0.01 Shares authorized 50,000 50,000 Shares issued 10,438 10,438 Subscription receivable — — Shares outstanding 10,438 10,438 Common stock, voting Par value $ 0.01 $ 0.01 Shares authorized 150,000,000 150,000,000 Shares issued 29,404,048 29,317,298 Shares outstanding 29,404,048 29,317,298

Consolidated Statements of Ch48

Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)	(dollars in thousands) Unrealized Gains (Losses) on Cash Flow Hedges Unrealized (Losses) on Available-for -Sale Securities Total Accumulated Other Comprehensive Income (Loss) Balance, January 1, 2017 $ 2,233 $ (9,501 ) $ (7,268 ) Other comprehensive income (loss), net of tax (18 ) 386 368 Balance, March 31, 2017 $ 2,215 $ (9,115 ) $ (6,900 ) Balance, January 1, 2018 $ 2,913 $ (8,000 ) $ (5,087 ) Reclassification of certain income tax effects from accumulated other comprehensive income 687 (1,450 ) (763 ) Other comprehensive income (loss), net of tax 2,893 (6,457 ) (3,564 ) Balance, March 31, 2018 $ 6,493 $ (15,907 ) $ (9,414 )

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Aforementioned Revisions to Consolidated Statements of Financial Condition (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Goodwill	$ 54,562	$ 54,562	$ 51,975	$ 51,975
Deferred tax assets, net	47,371	47,376
Total assets	$ 3,462,372	3,366,130
As Reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Goodwill		51,975
Deferred tax assets, net		49,963
Total assets		3,366,130
Adjustment
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Goodwill		2,587
Deferred tax assets, net		$ (2,587)

Recently Issued Accounting Pr50

Recently Issued Accounting Pronouncements - Additional Information (Details)	3 Months Ended
	Mar. 31, 2018USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of certain income tax effects from accumulated other comprehensive income	$ (763,000)
ASU 2018-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of certain income tax effects from accumulated other comprehensive income	$ 763,000

Acquisition of a Business - Add

Acquisition of a Business - Additional Information (Details)	Oct. 14, 2016USD ($)Subsidiary$ / sharesshares	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Goodwill		$ 54,562,000	$ 54,562,000	$ 51,975,000	$ 51,975,000
Ridgestone
Business Acquisition [Line Items]
Business acquisition date of agreement		Oct. 14, 2016
Number of operated wholly owned subsidiaries | Subsidiary	2
Total consideration included aggregate cash	$ 36,753,000
Issuance of common shares | shares	4,199,791
Common stock issued price per share | $ / shares	$ 16.25
Goodwill	$ 28,874,000
Acquisition advisory expenses	1,600,000
Contingent assets or liabilities arising from the acquisition	$ 0

Acquisition of a Business - Sum

Acquisition of a Business - Summary of Estimates of fair Values of Assets and Liabilities Assumed as of Acquisition Date (Details) - USD ($) $ in Thousands	Oct. 14, 2016	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Consideration paid
Goodwill		$ 54,562	$ 54,562	$ 51,975	$ 51,975
Ridgestone
Assets
Cash and cash equivalents	$ 25,480
Securities available-for-sale	27,662
Restricted stock	931
Loans held for sale	15,363
Loans	351,820
Servicing assets	20,295
Premises and equipment	2,011
Other real estate owned	1,525
Other intangible assets	486
Bank-owned life insurance	2,352
Other assets	5,641
Total assets acquired	453,566
Liabilities
Deposits	361,370
Federal Home Loan Bank advances	9,773
Junior subordinated debentures	1,339
Accrued expenses and other liabilities	4,958
Total liabilities assumed	377,440
Net assets acquired	76,126
Consideration paid
Common stock (4,199,791 shares issued at $16.25 per share)	68,247
Cash paid	36,753
Total consideration paid	105,000
Goodwill	$ 28,874

Acquisition of a Business - S53

Acquisition of a Business - Summary of Estimates of fair Values of Assets and Liabilities Assumed as of Acquisition Date (Parenthetical) (Details) - Ridgestone	Oct. 14, 2016$ / sharesshares
Business Acquisition [Line Items]
Stock issued (in shares) | shares	4,199,791
Stock issued (in dollars per share) | $ / shares	$ 16.25

Acquisition of a Business - S54

Acquisition of a Business - Summary of Acquired Non-Impaired Loans as of Acquisition Date (Details) $ in Thousands	Oct. 14, 2016USD ($)
Business Combinations [Abstract]
Fair value	$ 312,166
Gross contractual amounts receivable	450,292
Estimate of contractual cash flows not expected to be collected	19,661	[1]
Estimate of contractual cash flows expected to be collected	$ 430,631
[1]	Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Fair Values of Securities Available-for-sale (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 644,840	$ 593,167
Available-for-sale Securities, Gross Unrealized Gains	2,335	2,486
Available-for-sale Securities, Gross Unrealized Losses	(21,118)	(12,417)
Available-for-sale Securities, Fair Value	626,057	583,236
U.S. Treasury Notes
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	22,934	14,999
Available-for-sale Securities, Gross Unrealized Gains	2
Available-for-sale Securities, Gross Unrealized Losses	(195)	(136)
Available-for-sale Securities, Fair Value	22,741	14,863
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	64,293	54,248
Available-for-sale Securities, Gross Unrealized Gains	46
Available-for-sale Securities, Gross Unrealized Losses	(1,718)	(1,290)
Available-for-sale Securities, Fair Value	62,621	52,958
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	32,876	33,405
Available-for-sale Securities, Gross Unrealized Gains	21	100
Available-for-sale Securities, Gross Unrealized Losses	(749)	(335)
Available-for-sale Securities, Fair Value	32,148	33,170
Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	321,957	315,103
Available-for-sale Securities, Gross Unrealized Losses	(12,907)	(7,646)
Available-for-sale Securities, Fair Value	309,050	307,457
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	55,341	39,485
Available-for-sale Securities, Gross Unrealized Gains		104
Available-for-sale Securities, Gross Unrealized Losses	(1,067)	(75)
Available-for-sale Securities, Fair Value	54,274	39,514
Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	76,866	70,964
Available-for-sale Securities, Gross Unrealized Gains	76	45
Available-for-sale Securities, Gross Unrealized Losses	(2,815)	(1,966)
Available-for-sale Securities, Fair Value	74,127	69,043
Non-Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	31,688	31,763
Available-for-sale Securities, Gross Unrealized Losses	(1,344)	(792)
Available-for-sale Securities, Fair Value	30,344	30,971
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	35,257	29,573
Available-for-sale Securities, Gross Unrealized Gains	315	507
Available-for-sale Securities, Gross Unrealized Losses	(209)	(104)
Available-for-sale Securities, Fair Value	35,363	29,976
Other Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	3,628	3,627
Available-for-sale Securities, Gross Unrealized Gains	1,875	1,730
Available-for-sale Securities, Gross Unrealized Losses	(114)	(73)
Available-for-sale Securities, Fair Value	$ 5,389	$ 5,284

Securities - Summary of Amort56

Securities - Summary of Amortized Cost and Fair Values of Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	$ 112,266	$ 117,163
Held-to-maturity Securities, Gross Unrealized Gains	44	450
Held-to-maturity Securities, Gross Unrealized Losses	(1,891)	(336)
Securities held-to-maturity, fair value	110,419	117,277
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	23,982	24,030
Held-to-maturity Securities, Gross Unrealized Gains	44	197
Held-to-maturity Securities, Gross Unrealized Losses	(335)	(82)
Securities held-to-maturity, fair value	23,691	24,145
Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	49,946	53,731
Held-to-maturity Securities, Gross Unrealized Gains		79
Held-to-maturity Securities, Gross Unrealized Losses	(822)	(203)
Securities held-to-maturity, fair value	49,124	53,607
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	38,338	39,402
Held-to-maturity Securities, Gross Unrealized Gains		174
Held-to-maturity Securities, Gross Unrealized Losses	(734)	(51)
Securities held-to-maturity, fair value	$ 37,604	$ 39,525

Securities - Additional Informa

Securities - Additional Information (Details)	3 Months Ended
	Mar. 31, 2018USD ($)Security	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Schedule Of Investments [Line Items]
Trading securities	$ 0		$ 0
Net gains or (losses) reclassified from accumulated other comprehensive income (loss) into earnings	0	$ 8,000
Carrying amount of securities pledged as collateral	$ 348,600,000		$ 262,500,000
Minimum
Schedule Of Investments [Line Items]
Percentage of shareholders equity for which securities holdings exceeds for no issuer other than U.S. Government and agencies	10.00%		10.00%
Federal Home Loan Bank Advances
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral	$ 155,500,000		$ 128,400,000
Public Fund Deposits
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral	160,300,000		99,300,000
Customer Repurchase Agreements
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral	$ 32,900,000		$ 34,800,000
Available-for-sale Securities
Schedule Of Investments [Line Items]
Investment securities with unrealized losses | Security	120
Held-to-maturity Securities
Schedule Of Investments [Line Items]
Investment securities with unrealized losses | Security	51

Securities - Summary of Gross U

Securities - Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Available-for-sale (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)Security	Dec. 31, 2017USD ($)Security
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	120	101
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 132,565	$ 39,896
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(2,135)	(407)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	435,500	455,688
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(18,983)	(12,010)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	568,065	495,584
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (21,118)	$ (12,417)
U.S. Treasury Notes
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	6	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 9,954	$ 4,998
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(12)	(2)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	9,817	9,865
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(183)	(134)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	19,771	14,863
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (195)	$ (136)
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	9	9
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 989	$ 992
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(10)	(7)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	51,558	51,966
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(1,708)	(1,283)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	52,547	52,958
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,718)	$ (1,290)
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	36	29
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 22,418	$ 16,059
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(475)	(137)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	4,374	4,453
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(274)	(198)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	26,792	20,512
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (749)	$ (335)
Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	43	41
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 33,601	$ 15,441
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(598)	(181)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	275,450	292,016
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(12,309)	(7,465)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	309,051	307,457
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (12,907)	$ (7,646)
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	6	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 49,937
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(885)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	4,337	$ 4,565
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(182)	(75)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	54,274	4,565
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,067)	$ (75)
Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	8	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 7,228
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(24)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	55,306	$ 57,442
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(2,791)	(1,966)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	62,534	57,442
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (2,815)	$ (1,966)
Non-Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	5	5
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 30,344	$ 30,971
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(1,344)	(792)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	30,344	30,971
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,344)	$ (792)
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	6	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 8,438	$ 2,406
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(131)	(80)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	2,434	2,489
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(78)	(24)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	10,872	4,895
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (209)	$ (104)
Other Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	1	1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 1,880	$ 1,921
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(114)	(73)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	1,880	1,921
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (114)	$ (73)

Securities - Summary of Gross59

Securities - Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Held-to-maturity (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)Security	Dec. 31, 2017USD ($)Security
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	51	28
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 91,376	$ 42,211
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1,449)	(155)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	12,761	13,865
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(442)	(181)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	104,137	56,076
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,891)	$ (336)
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	24	12
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 15,870	$ 7,409
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(286)	(38)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,539	1,548
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(49)	(44)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	17,409	8,957
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (335)	$ (82)
Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	20	13
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 42,065	$ 24,344
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(572)	(107)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	7,060	7,935
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(250)	(96)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	49,125	32,279
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (822)	$ (203)
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	7	3
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 33,441	$ 10,458
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(591)	(10)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	4,162	4,382
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(143)	(41)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	37,603	14,840
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (734)	$ (51)

Securities - Summary of Proceed

Securities - Summary of Proceeds From Sales of Securities Available-for-sale and Associated Gains and Losses (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Available For Sale Securities Gross Realized Gain Loss [Abstract]
Proceeds	$ 8
Gross gains	$ 8

Securities - Schedule of Amorti

Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available-for-sale Securities Debt Maturities, Amortized Cost [Abstract]
Available-for-sale Securities, Due in one year or less, Amortized Cost	$ 5,695
Available-for-sale Securities, Due from one to five years, Amortized Cost	88,763
Available-for-sale Securities, Due from five to ten years, Amortized Cost	47,396
Available-for-sale Securities, Due after ten years, Amortized Cost	14,042
Available-for-sale Securities, Amortized Cost	644,840	$ 593,167
Held-to-maturity Securities Debt Maturities, Amortized Cost [Abstract]
Held-to-maturity Securities, Due from one to five years, Amortized Cost	3,523
Held-to-maturity Securities, Due from five to ten years, Amortized Cost	11,706
Held-to-maturity Securities, Due after ten years, Amortized Cost	8,753
Held-to-maturity Securities, Amortized Cost	112,266	117,163
Available-for-sale Securities Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Due in one year or less, Fair Value	5,689
Available-for-sale Securities, Due from one to five years, Fair Value	87,589
Available-for-sale Securities, Due from five to ten years, Fair Value	46,274
Available-for-sale Securities, Due after ten years, Fair Value	14,013
Total	626,057	583,236
Held-to-maturity Securities Debt Maturities, Fair Value [Abstract]
Held-to-maturity Securities, Due from one to five years, Fair Value	3,500
Held-to-maturity Securities, Due from five to ten years, Fair Value	11,523
Held-to-maturity Securities, Due after ten years, Fair Value	8,668
Total	110,419	117,277
Mortgage-Backed Securities
Available-for-sale Securities Debt Maturities, Amortized Cost [Abstract]
Available-for-sale Securities, Not due at single maturity, Amortized Cost	485,852
Held-to-maturity Securities Debt Maturities, Amortized Cost [Abstract]
Held-to-maturity Securities, Mortgage-backed securities, Amortized Cost	88,284
Available-for-sale Securities Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Not due at single maturity, Fair Value	467,795
Held-to-maturity Securities Debt Maturities, Fair Value [Abstract]
Held-to-maturity Securities, Mortgage-backed securities, Fair Value	86,728
Other Securities With No Defined Maturity
Available-for-sale Securities Debt Maturities, Amortized Cost [Abstract]
Available-for-sale Securities, Not due at single maturity, Amortized Cost	3,092
Available-for-sale Securities, Amortized Cost	3,628	3,627
Available-for-sale Securities Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Not due at single maturity, Fair Value	4,697
Total	$ 5,389	$ 5,284

Loan and Lease Receivables - Sc

Loan and Lease Receivables - Schedule of Outstanding Loan and Lease Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 2,278,246	$ 2,275,691
Net unamortized deferred fees and costs	(1,357)	(1,720)
Initial direct costs	3,529	3,521
Allowance for loan and lease losses	(17,640)	(16,706)	$ (11,817)	$ (10,923)
Net loans and leases	2,262,778	2,260,786
Lease financing receivables
Net minimum lease payments	193,146	188,986
Unguaranteed residual values	1,613	1,644
Unearned income	(16,827)	(16,465)
Total lease financing receivables	177,932	174,165
Initial direct costs	3,529	3,521
Lease financial receivables before allowance for lease losses	181,461	177,686
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	840,958	891,971
Allowance for loan and lease losses	(5,319)	(4,794)	(2,047)	(1,945)
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	568,030	577,123
Allowance for loan and lease losses	(1,564)	(1,638)	(2,417)	(2,483)
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	117,597	105,996
Allowance for loan and lease losses	(201)	(222)	(417)	(742)
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	569,647	522,254
Allowance for loan and lease losses	(7,763)	(7,418)	(4,836)	(4,196)
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	4,082	4,182
Allowance for loan and lease losses	(61)	(41)	(331)	(334)
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	177,932	174,165
Allowance for loan and lease losses	$ (2,732)	$ (2,593)	$ (1,769)	$ (1,223)

Loan and Lease Receivables - Ad

Loan and Lease Receivables - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 2,278,246,000	$ 2,275,691,000
Loans held for sale pledged as security for borrowings	530,000,000	516,900,000
Allowance for loan and lease losses	17,640,000	16,706,000	$ 11,817,000	$ 10,923,000
Acquired Impaired Loans
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan and lease losses	3,500,000	3,900,000
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	4,082,000	4,182,000
Overdraft deposits reclassified as loans	467,000	617,000
Allowance for loan and lease losses	61,000	41,000	$ 331,000	$ 334,000
U.S. Government Guaranteed Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 73,200,000	$ 77,000,000

Loan and Lease Receivables - Su

Loan and Lease Receivables - Summary of Minimum Annual Lease Payments for Lease Financing Receivables (Details) $ in Thousands	Mar. 31, 2018USD ($)
Receivables [Abstract]
2,018	$ 51,913
2,019	58,980
2,020	42,897
2,021	25,541
2,022	12,131
Thereafter	1,684
Total	$ 193,146

Loan and Lease Receivables - 65

Loan and Lease Receivables - Summary of Balances for Each Respective Loan and Lease Category (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 2,280,418	$ 2,277,492	$ 2,143,534
Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,618,734	1,573,383
Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	311,474	327,690
Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	350,210	376,419
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	840,869	891,693	822,850
Commercial Real Estate | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	485,324	513,622
Commercial Real Estate | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	157,956	166,712
Commercial Real Estate | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	197,589	211,359
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	568,159	577,218	601,407
Residential Real Estate | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	397,516	400,571
Residential Real Estate | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	139,858	144,562
Residential Real Estate | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	30,785	32,085
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	117,070	105,429	105,315
Construction, Land Development, and Other Land | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	110,092	97,638
Construction, Land Development, and Other Land | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	5,156	5,946
Construction, Land Development, and Other Land | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,822	1,845
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	568,729	521,238	448,467
Commercial and Industrial | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	470,689	416,499
Commercial and Industrial | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	8,055	10,008
Commercial and Industrial | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	89,985	94,731
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	4,130	4,228	2,820
Installment and Other | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	3,645	3,724
Installment and Other | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	449	462
Installment and Other | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	36	42
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	181,461	177,686	$ 162,675
Lease Financing Receivables | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	151,468	141,329
Lease Financing Receivables | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 29,993	$ 36,357

Loan and Lease Receivables - 66

Loan and Lease Receivables - Summary of Outstanding Balance and Carrying Amount of All Acquired Impaired Loans (Details) - Acquired Impaired Loans - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	$ 458,829	$ 476,980
Carrying Value	311,474	327,690
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	227,322	235,898
Carrying Value	157,956	166,712
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	200,524	207,660
Carrying Value	139,858	144,562
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	13,108	13,270
Carrying Value	5,156	5,946
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	16,079	18,333
Carrying Value	8,055	10,008
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	1,796	1,819
Carrying Value	$ 449	$ 462

Loan and Lease Receivables - 67

Loan and Lease Receivables - Summary of Changes in Accretable Yield for Acquired Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Receivables [Abstract]
Beginning balance	$ 36,446	$ 36,868
Accretion to interest income	(5,691)	(5,684)
Reclassification from nonaccretable difference, net	8,545	3,560
Ending balance	$ 39,300	$ 34,744

Loan and Lease Receivables - 68

Loan and Lease Receivables - Schedule of Unpaid Principal Balance and Carrying Value for Acquired Non-impaired Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	$ 2,280,418	$ 2,277,492	$ 2,143,534
Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	369,182	399,601
Loans and leases	350,210	376,419
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	840,869	891,693	822,850
Commercial Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	203,539	221,710
Loans and leases	197,589	211,359
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	568,159	577,218	601,407
Residential Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	31,291	32,605
Loans and leases	30,785	32,085
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	117,070	105,429	105,315
Construction, Land Development, and Other Land | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	1,881	1,926
Loans and leases	1,822	1,845
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	568,729	521,238	448,467
Commercial and Industrial | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	100,894	105,529
Loans and leases	89,985	94,731
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	4,130	4,228	2,820
Installment and Other | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	350	355
Loans and leases	36	42
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	181,461	177,686	$ 162,675
Lease Financing Receivables | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	31,227	37,476
Loans and leases	$ 29,993	$ 36,357

Allowance for Loan and Lease 69

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Allowance for Loan and Lease Losses and Corresponding Loan and Lease Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Allowance for loan and lease losses
Beginning balance	$ 16,706	$ 10,923
Provisions (releases)	5,115	1,891
Charge-offs	(4,422)	(1,290)
Recoveries	241	293
Ending balance	17,640	11,817
Ending balance:
Individually evaluated for impairment			$ 4,702		$ 1,599
Collectively evaluated for impairment			9,409		8,467
Allowance for loan and lease losses	17,640	10,923	17,640	$ 16,706	11,817
Loans and leases ending balance:
Individually evaluated for impairment			27,016		14,755
Collectively evaluated for impairment			1,941,928		1,737,745
Total loans and leases			2,280,418	2,277,492	2,143,534
Receivables Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality			3,529		1,751
Loans and leases ending balance:
Loans acquired with deteriorated credit quality			311,474		391,034
Commercial Real Estate
Allowance for loan and lease losses
Beginning balance	4,794	1,945
Provisions (releases)	934	340
Charge-offs	(409)	(238)
Ending balance	5,319	2,047
Ending balance:
Individually evaluated for impairment			1,572
Collectively evaluated for impairment			1,827		1,622
Allowance for loan and lease losses	4,794	1,945	5,319	4,794	2,047
Loans and leases ending balance:
Individually evaluated for impairment			12,375		9,764
Collectively evaluated for impairment			670,538		611,397
Total loans and leases			840,869	891,693	822,850
Commercial Real Estate | Receivables Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality			1,920		425
Loans and leases ending balance:
Loans acquired with deteriorated credit quality			157,956		201,689
Residential Real Estate
Allowance for loan and lease losses
Beginning balance	1,638	2,483
Provisions (releases)	(74)	1
Charge-offs		(67)
Ending balance	1,564	2,417
Ending balance:
Individually evaluated for impairment			153		282
Collectively evaluated for impairment			1,036		1,470
Allowance for loan and lease losses	1,638	2,483	1,564	1,638	2,417
Loans and leases ending balance:
Individually evaluated for impairment			2,029		1,262
Collectively evaluated for impairment			426,272		430,469
Total loans and leases			568,159	577,218	601,407
Residential Real Estate | Receivables Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality			375		665
Loans and leases ending balance:
Loans acquired with deteriorated credit quality			139,858		169,676
Construction, Land Development, and Other Land
Allowance for loan and lease losses
Beginning balance	222	742
Provisions (releases)	397	(325)
Charge-offs	(418)
Ending balance	201	417
Ending balance:
Individually evaluated for impairment					26
Collectively evaluated for impairment			177		391
Allowance for loan and lease losses	222	742	201	222	417
Loans and leases ending balance:
Individually evaluated for impairment					85
Collectively evaluated for impairment			111,914		99,114
Total loans and leases			117,070	105,429	105,315
Construction, Land Development, and Other Land | Receivables Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality			24
Loans and leases ending balance:
Loans acquired with deteriorated credit quality			5,156		6,116
Commercial and Industrial
Allowance for loan and lease losses
Beginning balance	7,418	4,196
Provisions (releases)	3,424	855
Charge-offs	(3,085)	(215)
Recoveries	6
Ending balance	7,763	4,836
Ending balance:
Individually evaluated for impairment			2,963		966
Collectively evaluated for impairment			3,626		3,210
Allowance for loan and lease losses	7,418	4,196	7,763	7,418	4,836
Loans and leases ending balance:
Individually evaluated for impairment			12,598		3,317
Collectively evaluated for impairment			548,076		432,036
Total loans and leases			568,729	521,238	448,467
Commercial and Industrial | Receivables Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality			1,174		660
Loans and leases ending balance:
Loans acquired with deteriorated credit quality			8,055		13,114
Installment and Other
Allowance for loan and lease losses
Beginning balance	41	334
Provisions (releases)	20	(3)
Ending balance	61	331
Ending balance:
Individually evaluated for impairment			14		325
Collectively evaluated for impairment			11		5
Allowance for loan and lease losses	41	334	61	41	331
Loans and leases ending balance:
Individually evaluated for impairment			14		327
Collectively evaluated for impairment			3,667		2,054
Total loans and leases			4,130	4,228	2,820
Installment and Other | Receivables Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality			36		1
Loans and leases ending balance:
Loans acquired with deteriorated credit quality			449		439
Lease Financing Receivables
Allowance for loan and lease losses
Beginning balance	2,593	1,223
Provisions (releases)	414	1,023
Charge-offs	(510)	(770)
Recoveries	235	293
Ending balance	2,732	1,769
Ending balance:
Collectively evaluated for impairment			2,732		1,769
Allowance for loan and lease losses	$ 2,593	$ 1,223	2,732	2,593	1,769
Loans and leases ending balance:
Collectively evaluated for impairment			181,461		162,675
Total loans and leases			$ 181,461	$ 177,686	$ 162,675

Allowance for Loan and Lease 70

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Additional Information (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)Loan	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	$ 934,000	$ 894,000
Recorded investment in troubled debt restructurings	2,100,000		$ 2,600,000
Specific allowance allocated for loans	215,000		357,000
Commitments outstanding on troubled debt restructurings	0		0
Charge-offs or permanent reductions of recorded investments in loans	144,000		487,000
Recorded investment in troubled debt restructurings that subsequently defaulted within twelve months	0		144,000
Reserve for unfunded commitments	1,000,000		923,000
Provisions for unfunded commitments	113,000	50,000
Charge-offs or recoveries related to reserve for unfunded commitments	$ 0		$ 0
Commercial Real Estate
Loans And Leases Receivable Disclosure [Line Items]
Number of loans modified under troubled debt restructuring | Loan	1
Loans modified as troubled debt restructurings	$ 125,000
Acquired Impaired Loans
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	$ (345,000)	$ 140,000

Allowance for Loan and Lease 71

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Recorded Investment, Unpaid Principal Balance, and Related Allowance for Loans and Leases Considered Impaired (Details) - Loans Excluding Acquired Impaired Loans - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Recorded Investment	$ 27,016	$ 31,111
Unpaid Principal Balance	33,650	34,479
Related Allowance	4,702	3,965
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	6,151	11,425
Recorded Investment, With an allowance recorded	6,224	2,459
Unpaid Principal Balance, With no related allowance recorded	7,116	12,936
Unpaid Principal Balance, With an allowance recorded	7,684	2,634
Related Allowance	1,572	1,101
Residential Real Estate
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,682	2,075
Recorded Investment, With an allowance recorded	347	354
Unpaid Principal Balance, With no related allowance recorded	1,653	2,046
Unpaid Principal Balance, With an allowance recorded	345	351
Related Allowance	153	158
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	6,441	5,470
Recorded Investment, With an allowance recorded	6,157	9,314
Unpaid Principal Balance, With no related allowance recorded	7,678	6,774
Unpaid Principal Balance, With an allowance recorded	9,160	9,724
Related Allowance	2,963	2,692
Installment and Other
Financing Receivable Impaired [Line Items]
Recorded Investment, With an allowance recorded	14	14
Unpaid Principal Balance, With an allowance recorded	14	14
Related Allowance	$ 14	$ 14

Allowance for Loan and Lease 72

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Average Recorded Investment and Interest Income Recognized for Loans and Leases Considered Impaired (Details) - Loans Excluding Acquired Impaired Loans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable Impaired [Line Items]
Average Recorded Investment	$ 29,731	$ 14,770
Interest Income Recognized	315	211
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded	9,039	9,798
Average Recorded Investment, With an allowance recorded	4,122
Interest Income Recognized, With no related allowance recorded	103	130
Interest Income Recognized, With an allowance recorded	37
Residential Real Estate
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded	1,930	787
Average Recorded Investment, With an allowance recorded	351	488
Interest Income Recognized, With no related allowance recorded	10	7
Interest Income Recognized, With an allowance recorded	1	1
Construction, Land Development, and Other Land
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With an allowance recorded		86
Interest Income Recognized, With an allowance recorded		6
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded	7,300	1,402
Average Recorded Investment, With an allowance recorded	6,975	1,881
Interest Income Recognized, With no related allowance recorded	62	60
Interest Income Recognized, With an allowance recorded	102	3
Installment and Other
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With an allowance recorded	$ 14	328
Interest Income Recognized, With an allowance recorded		$ 4

Allowance for Loan and Lease 73

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Risk Rating Categories of Loans and Leases Considered for Inclusion in Allowance for Loan and Lease Losses Calculation (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	$ 2,280,418	$ 2,277,492	$ 2,143,534
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	840,869	891,693	822,850
Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	568,159	577,218	601,407
Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	117,070	105,429	105,315
Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	568,729	521,238	448,467
Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	4,130	4,228	2,820
Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	181,461	177,686	$ 162,675
Loans Excluding Acquired Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,968,944	1,949,802
Loans Excluding Acquired Impaired Loans | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	682,913	724,981
Loans Excluding Acquired Impaired Loans | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	428,301	432,656
Loans Excluding Acquired Impaired Loans | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	111,914	99,483
Loans Excluding Acquired Impaired Loans | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	560,674	511,230
Loans Excluding Acquired Impaired Loans | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	3,681	3,766
Loans Excluding Acquired Impaired Loans | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	181,461	177,686
Loans Excluding Acquired Impaired Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,720,115	1,704,311
Loans Excluding Acquired Impaired Loans | Pass | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	593,209	638,066
Loans Excluding Acquired Impaired Loans | Pass | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	393,416	398,743
Loans Excluding Acquired Impaired Loans | Pass | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	85,634	73,935
Loans Excluding Acquired Impaired Loans | Pass | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	465,449	415,163
Loans Excluding Acquired Impaired Loans | Pass | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	3,648	3,732
Loans Excluding Acquired Impaired Loans | Pass | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	178,759	174,672
Loans Excluding Acquired Impaired Loans | Watch
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	183,893	176,996
Loans Excluding Acquired Impaired Loans | Watch | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	65,816	58,217
Loans Excluding Acquired Impaired Loans | Watch | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	29,875	29,165
Loans Excluding Acquired Impaired Loans | Watch | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	23,127	22,380
Loans Excluding Acquired Impaired Loans | Watch | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	64,914	67,024
Loans Excluding Acquired Impaired Loans | Watch | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	2	20
Loans Excluding Acquired Impaired Loans | Watch | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	159	190
Loans Excluding Acquired Impaired Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	29,772	34,892
Loans Excluding Acquired Impaired Loans | Special Mention | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	10,665	14,645
Loans Excluding Acquired Impaired Loans | Special Mention | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	2,573	2,251
Loans Excluding Acquired Impaired Loans | Special Mention | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	3,153	3,168
Loans Excluding Acquired Impaired Loans | Special Mention | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	12,272	13,535
Loans Excluding Acquired Impaired Loans | Special Mention | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	17
Loans Excluding Acquired Impaired Loans | Special Mention | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,092	1,293
Loans Excluding Acquired Impaired Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	34,875	33,331
Loans Excluding Acquired Impaired Loans | Substandard | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	13,223	14,053
Loans Excluding Acquired Impaired Loans | Substandard | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	2,437	2,497
Loans Excluding Acquired Impaired Loans | Substandard | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	18,039	15,508
Loans Excluding Acquired Impaired Loans | Substandard | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	14	14
Loans Excluding Acquired Impaired Loans | Substandard | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,162	1,259
Loans Excluding Acquired Impaired Loans | Doubtful
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	289	272
Loans Excluding Acquired Impaired Loans | Doubtful | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	$ 289	$ 272

Allowance for Loan and Lease 74

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Contractual Delinquency Information (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	$ 2,280,418	$ 2,277,492	$ 2,143,534
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	840,869	891,693	822,850
Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	568,159	577,218	601,407
Construction, Land Development, and Other Land
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	117,070	105,429	105,315
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	568,729	521,238	448,467
Installment and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	4,130	4,228	2,820
Lease Financing Receivables
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	181,461	177,686	$ 162,675
Acquired Non-Impaired and Originated Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	46,415	30,950
Non-accrual	23,626	15,764
Current	1,922,529	1,918,852
Total loans and leases	1,968,944	1,949,802
Acquired Non-Impaired and Originated Loans | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	20,708	12,613
Acquired Non-Impaired and Originated Loans | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,081	2,573
Acquired Non-Impaired and Originated Loans | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	17,460	14,210
Non-accrual	8,194	8,459
Current	665,453	710,771
Total loans and leases	682,913	724,981
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	9,266	4,783
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		968
Acquired Non-Impaired and Originated Loans | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,927	2,240
Non-accrual	1,848	2,092
Current	426,374	430,416
Total loans and leases	428,301	432,656
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	79	148
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment Past Due [Line Items]
Current	111,914	99,483
Total loans and leases	111,914	99,483
Acquired Non-Impaired and Originated Loans | Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	24,684	11,982
Non-accrual	12,916	4,348
Current	535,990	499,248
Total loans and leases	560,674	511,230
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	10,064	6,667
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,704	967
Acquired Non-Impaired and Originated Loans | Installment and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	31	32
Non-accrual	14	14
Current	3,650	3,734
Total loans and leases	3,681	3,766
Acquired Non-Impaired and Originated Loans | Installment and Other | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	17	18
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,313	2,486
Non-accrual	654	851
Current	179,148	175,200
Total loans and leases	181,461	177,686
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,282	997
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 377	$ 638

Servicing Assets - Activity for

Servicing Assets - Activity for Servicing Assets and Related Changes in Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Transfers And Servicing [Abstract]
Beginning balance	$ 21,400	$ 21,091
Additions, net	2,102	1,422
Changes in fair value	(1,887)	(1,290)
Ending balance	$ 21,615	$ 21,223

Servicing Assets - Unpaid Princ

Servicing Assets - Unpaid Principal Balances of Loans Serviced for Others (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loan portfolios serviced for:
Unpaid principal balances of loans serviced	$ 1,159,919	$ 1,112,901
SBA guaranteed loans
Loan portfolios serviced for:
Unpaid principal balances of loans serviced	1,066,269	1,021,143
USDA guaranteed loans
Loan portfolios serviced for:
Unpaid principal balances of loans serviced	$ 93,650	$ 91,758

Servicing Assets - Additional I

Servicing Assets - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Transfers And Servicing [Abstract]
Servicing fees	$ 563,000	$ 919,000

Other Real Estate Owned - Chang

Other Real Estate Owned - Change in Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Banking And Thrift [Abstract]
Other real estate owned, beginning balance	$ 10,626	$ 16,570
Net additions to OREO	1,044	808
Dispositions of OREO	(1,123)	(3,929)
Valuation adjustments	(81)	(276)
Other real estate owned, ending balance	$ 10,466	$ 13,173

Other Real Estate Owned - Addit

Other Real Estate Owned - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Real Estate [Line Items]
Foreclosed real estate properties recorded as result of obtaining physical possession of property	$ 10,466	$ 10,626	$ 13,173	$ 16,570
Residential consumer mortgage loans in process of foreclosure	2,400	1,900
Residential Real Estate
Real Estate [Line Items]
Foreclosed real estate properties recorded as result of obtaining physical possession of property	$ 2,900	$ 3,600

Goodwill, Core Deposit Intang80

Goodwill, Core Deposit Intangible and Other Intangible Assets - Summary of Changes in Goodwill and Core Deposit Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance, Goodwill	$ 54,562	$ 51,975
Ending balance, Goodwill	54,562	51,975
Amortization or accretion	(767)	(769)
Core Deposits
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance	16,720	19,776
Amortization or accretion	(761)	(765)
Ending balance	15,959	19,011
Accumulated amortization or accretion	$ 14,227	$ 11,175
Weighted average remaining amortization or accretion period	5 years 4 months 24 days	6 years 4 months 24 days

Goodwill, Core Deposit Intang81

Goodwill, Core Deposit Intangible and Other Intangible Assets - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Indefinite Lived Intangible Assets By Major Class [Line Items]
Other intangible assets, net	$ 15,991,000	$ 16,756,000
Trademark
Indefinite Lived Intangible Assets By Major Class [Line Items]
Other intangible assets, net	$ 32,000	$ 36,000

Goodwill, Core Deposit Intang82

Goodwill, Core Deposit Intangible and Other Intangible Assets - Estimated Amortization Expense for Core Deposit Intangible and Other Intangible Assets Recognized (Details) $ in Thousands	Mar. 31, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2,018	$ 2,295
2,019	3,050
2,020	3,027
2,021	3,017
2,022	3,010
Thereafter	1,592
Total	$ 15,991

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective tax rate	16.30%	40.90%
Corporate federal income tax rate	21.00%		35.00%
Net income tax benefit	$ 724,000
Deferred tax assets, net	$ 47,400		$ 47,400

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Non-interest bearing demand deposits	$ 749,892	$ 760,887
Interest bearing checking accounts	196,802	186,611
Money market demand accounts	382,282	349,862
Other savings	439,277	437,212
Time deposits (below $250,000)	665,541	627,255
Time deposits ($250,000 and above)	90,753	81,502
Total deposits	$ 2,524,547	$ 2,443,329

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Brokered deposits	$ 0	$ 0

Federal Home Loan Bank Advanc86

Federal Home Loan Bank Advances - Summary of FHLB Advances (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Federal Home Loan Banks [Abstract]
Federal Home Loan Bank advances	$ 380,000	$ 361,506
Weighted average cost	1.88%	1.49%

Federal Home Loan Bank Advanc87

Federal Home Loan Bank Advances - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Federal Home Loan Bank Advances [Line Items]
Federal home loan bank, total fixed-rate advances	$ 250,000,000
Federal home loan bank advances, Fixed interest rate	2.02%
Federal home loan bank fixed rate advances, maturity date	2018-06
Federal home loan bank, total floating rate advances	$ 130,000,000
Federal home loan bank advances, Floating interest rate	1.62%
Federal home loan bank, required investment conversion ratio	0.05
Additional borrowing capacity from FHLB	$ 797,500,000	$ 795,000,000
Federal home loan bank advances maximum borrowing capacity as percentage of total assets	35.00%
Minimum
Federal Home Loan Bank Advances [Line Items]
Federal home loan bank floating rate advances, maturity date	2018-04
Maximum
Federal Home Loan Bank Advances [Line Items]
Federal home loan bank floating rate advances, maturity date	2018-05

Other Borrowings - Summary of O

Other Borrowings - Summary of Other Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 27,815	$ 31,187
Total	$ 27,815	$ 31,187

Other Borrowings - Additional I

Other Borrowings - Additional Information (Details) - USD ($)	Oct. 12, 2017	Jul. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Apr. 30, 2017	Dec. 31, 2016	Oct. 13, 2016
Line Of Credit Facility [Line Items]
Repayment of lines of credit		$ 16,200,000		$ 2,500,000
Short-term credit lines available for use, outstanding			$ 0				$ 0
Ridgestone | Correspondent Bank | Credit agreement
Line Of Credit Facility [Line Items]
Line of credit facility, amount								$ 30,000,000
Line of credit facility, interest rate			3.75%		3.75%
Line of credit facility, maturity date			Oct. 12, 2017
Ridgestone | Correspondent Bank | Amended Credit Agreement
Line Of Credit Facility [Line Items]
Line of credit facility, amount			$ 0		$ 0
Line of credit facility, revolving credit conversion to non-revolving line of credit, description			In April 2017, the revolving line of credit was amended to a non-revolving line of credit as long as the outstanding balance exceeds $5.0 million.
Line of credit facility, revolving credit conversion to non-revolving line of credit, threshold amount						$ 5,000,000
Threshold amount for conversion of line of credit into revolving line of credit						5,000,000
Revolving line of credit facility, maximum borrowing capacity						$ 5,000,000
Line of credit facility, extended maturity date	Oct. 11, 2018
Line of credit facility, interest rate terms	The amended revolving line of credit bears interest at either the London Interbank Offered Rate (“LIBOR”) Rate plus 250 basis points or the Prime Rate minus 25 basis points, based on the Company’s election, which is required to be communicated at least three business days prior to the commencement of an interest period. If the Company fails to provide timely notification, the interest rate will be Prime Rate minus 25 basis points. At March 31, 2018 and December 31, 2017, the line of credit has not been drawn upon, so an interest rate option has not been selected.
Ridgestone | Correspondent Bank | Amended Credit Agreement | LIBOR Rate
Line Of Credit Facility [Line Items]
Interest rate spread	2.50%
Ridgestone | Correspondent Bank | Amended Credit Agreement | Prime Rate
Line Of Credit Facility [Line Items]
Interest rate spread	0.25%

Other Borrowings - Summary of S

Other Borrowings - Summary of Short-term Credit Lines Available for Use (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Federal Reserve Bank of Chicago Discount Window Line
Debt Instrument [Line Items]
Short-term credit lines available for use	$ 156,077	$ 144,248
Available Federal Funds Line
Debt Instrument [Line Items]
Short-term credit lines available for use	$ 55,000	$ 55,000

Junior Subordinated Debenture91

Junior Subordinated Debentures - Junior Subordinated Debentures by Issuance (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	$ 36,500	$ 36,500
Total liability, at carrying value	27,800	27,647
Metropolitan Statutory Trust 1
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	35,000	35,000
RidgeStone Capital Trust I
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	1,500	1,500
Junior Subordinated Debentures
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Discount	$ (8,700)	$ (8,853)
Junior Subordinated Debentures | Metropolitan Statutory Trust 1
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Stated Maturity	Mar. 17, 2034
Contractual Rate	4.97%	4.39%
Junior Subordinated Debentures | Metropolitan Statutory Trust 1 | Three-month LIBOR
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Interest Rate Spread, Description	Three-month LIBOR
Interest Rate Spread	2.79%	2.79%
Junior Subordinated Debentures | RidgeStone Capital Trust I
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Stated Maturity	Jun. 30, 2033
Contractual Rate	5.09%	5.09%
Junior Subordinated Debentures | RidgeStone Capital Trust I | Five-year LIBOR
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Interest Rate Spread, Description	Five-year LIBOR
Interest Rate Spread	3.50%	3.50%

Junior Subordinated Debenture92

Junior Subordinated Debentures - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Principal amount	$ 36,500,000	$ 36,500,000
Accrued interest payable	1,612,000	1,306,000
Metropolitan Statutory Trust 1
Debt Instrument [Line Items]
Principal amount	$ 35,000,000	$ 35,000,000
Metropolitan Statutory Trust 1 | Junior Subordinated Debentures
Debt Instrument [Line Items]
Contractual rate	4.97%	4.39%
Accrued interest payable	$ 65,000	$ 62,000
Metropolitan Statutory Trust 1 | Junior Subordinated Debentures | Three-month LIBOR
Debt Instrument [Line Items]
Interest rate spread	2.79%	2.79%
RidgeStone Capital Trust I
Debt Instrument [Line Items]
Principal amount	$ 1,500,000	$ 1,500,000
RidgeStone Capital Trust I | Junior Subordinated Debentures
Debt Instrument [Line Items]
Contractual rate	5.09%	5.09%
Accrued interest payable	$ 0	$ 0
RidgeStone Capital Trust I | Junior Subordinated Debentures | Five-year LIBOR
Debt Instrument [Line Items]
Interest rate spread	3.50%	3.50%

Commitments and Contingent Li93

Commitments and Contingent Liabilities - Summary of Minimum Annual Rental Commitments for Operating Leases (Details) $ in Thousands	Mar. 31, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,018	$ 2,307
2,019	2,600
2,020	2,089
2,021	1,809
2,022	972
Thereafter	2,073
Total	$ 11,850

Commitments and Contingent Li94

Commitments and Contingent Liabilities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Commitments And Contingencies Liabilities [Line Items]
Rental expenses	$ 1,200,000	$ 1,100,000
Sublease income	170,000	$ 190,000
Minimum rental to be received in future on subleases	$ 1,800,000
Sublease contract maturity year	2,025
Fixed rate loan commitments maturity year	2,024
Variable rate loan commitments maturity year	2,040
Maximum
Commitments And Contingencies Liabilities [Line Items]
Commitments to make loans period	90 days
Loan commitments fixed interest rate	19.50%
Loan commitments variable interest rate	11.75%
Minimum
Commitments And Contingencies Liabilities [Line Items]
Loan commitments fixed interest rate	1.00%
Loan commitments variable interest rate	2.45%

Commitments and Contingent Li95

Commitments and Contingent Liabilities - Summary of Contract or Notional Amount of Outstanding Loan and Lease Commitments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Commitments And Contingencies Liabilities [Line Items]
Fixed Rate	$ 60,644	$ 57,150
Variable Rate	514,360	470,766
Commitments to Extend Credit
Commitments And Contingencies Liabilities [Line Items]
Fixed Rate	58,074	55,924
Variable Rate	510,822	467,429
Standby Letters of Credit
Commitments And Contingencies Liabilities [Line Items]
Fixed Rate	2,570	1,226
Variable Rate	$ 3,538	$ 3,337

Fair Value Measurement - Summar

Fair Value Measurement - Summary of Financial Assets And Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	$ 626,057	$ 583,236
Servicing assets, at fair value	21,615	21,400	$ 21,223	$ 21,091
Derivative assets	10,500	5,981
Derivative liabilities	1,432	994
U.S. Treasury Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	22,741	14,863
U.S. Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	62,621	52,958
Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	32,148	33,170
Corporate Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	35,363	29,976
Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	5,389	5,284
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Servicing assets, at fair value	21,615	21,400
Derivative assets	10,500	5,981
Derivative liabilities	1,432	994
Fair Value, Measurements, Recurring | U.S. Treasury Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	22,741	14,863
Fair Value, Measurements, Recurring | U.S. Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	62,621	52,958
Fair Value, Measurements, Recurring | Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	32,148	33,170
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Residential | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	309,050	307,457
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Residential | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	54,274	39,514
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Commercial | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	74,127	69,043
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Commercial | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	30,344	30,971
Fair Value, Measurements, Recurring | Corporate Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	35,363	29,976
Fair Value, Measurements, Recurring | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	5,389	5,284
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	22,741	14,863
Fair Value, Measurements, Recurring | Level 1 | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	1,880	1,921
Fair Value, Measurements, Recurring | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets	10,500	5,981
Derivative liabilities	1,430	994
Fair Value, Measurements, Recurring | Level 2 | U.S. Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	62,621	52,958
Fair Value, Measurements, Recurring | Level 2 | Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	31,773	32,795
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Residential | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	309,050	307,457
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Residential | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	54,274	39,514
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Commercial | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	74,127	69,043
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Commercial | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	30,344	30,971
Fair Value, Measurements, Recurring | Level 2 | Corporate Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	35,363	29,976
Fair Value, Measurements, Recurring | Level 2 | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	2,817	2,686
Fair Value, Measurements, Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Servicing assets, at fair value	21,615	21,400
Derivative liabilities	2
Fair Value, Measurements, Recurring | Level 3 | Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	375	375
Fair Value, Measurements, Recurring | Level 3 | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value	$ 692	$ 677

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract]
Fair value, assets, level 1 to level 2 transfers, amount	$ 0	$ 0
Fair value, assets, level 2 to level 1 transfers, amount	0	0
Fair value, liabilities, level 1 to level 2 transfers, amount	0	0
Fair value, liabilities, level 2 to level 1 transfers, amount	0	0
Fair value, equity, level 1 to level 2 transfers, amount	0	0
Fair value, equity, level 2 to level 1 transfers, amount	$ 0	$ 0

Fair Value Measurement - Summ98

Fair Value Measurement - Summary of Financial Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investment Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Balance, beginning of period	$ 1,052	$ 1,080
Amortization	1	1
Change in unrealized loss	14
Balance, end of period	1,067	1,081
Servicing Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Balance, beginning of period	21,400	21,091
Additions, net	2,102	1,422
Change in fair value	(1,887)	(1,290)
Balance, end of period	$ 21,615	$ 21,223

Fair Value Measurement - Summ99

Fair Value Measurement - Summary of Unobservable Inputs Used in Fair Value Measurements on Recurring Basis Categorized Within Level 3 of Fair Value Hierarchy (Details) - Fair Value, Measurements, Recurring - Level 3	3 Months Ended
	Mar. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impact to Valuation from an Increased or Higher Input Value	Decrease
Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	10.40%
Expected weighted average loan life	9 months 18 days
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	20.60%
Expected weighted average loan life	7 years 10 months 24 days
Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	14.20%
Expected weighted average loan life	5 years 6 months
Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	Discounted cash flow
Impact to Valuation from an Increased or Higher Input Value	Decrease
Obligations of States, Municipalities, and Political Subdivisions | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Probability of default	2.20%
Obligations of States, Municipalities, and Political Subdivisions | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Probability of default	2.40%
Obligations of States, Municipalities, and Political Subdivisions | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Probability of default	2.30%
Single Issuer Trust Preferred
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	Discounted cash flow
Impact to Valuation from an Increased or Higher Input Value	Decrease
Single Issuer Trust Preferred | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Probability of default	7.50%
Single Issuer Trust Preferred | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Probability of default	9.90%
Single Issuer Trust Preferred | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Probability of default	8.90%
Servicing Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique	Discounted cash flow
Impact to Valuation from an Increased or Higher Input Value	Decrease
Servicing Assets | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Prepayment speeds	5.60%
Servicing Assets | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Prepayment speeds	16.30%
Servicing Assets | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Prepayment speeds	9.30%

Fair Value Measurement - Sum100

Fair Value Measurement - Summary of Assets Measured at Fair Value on Non-recurring Basis, Excluding Acquired Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	$ 10,803	$ 12,783
Residential Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	1,876	2,271
Commercial and Industrial
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	9,635	12,092
Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	10,466	10,626
Assets Held For Sale
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	9,030	9,779
Level 3 | Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	10,803	12,783
Level 3 | Residential Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	1,876	2,271
Level 3 | Commercial and Industrial
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	9,635	12,092
Level 3 | Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	10,466	10,626
Level 3 | Assets Held For Sale
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	$ 9,030	$ 9,779

Fair Value Measurement - Sum101

Fair Value Measurement - Summary of Valuation Technique, Unobservable Inputs and Qualitative Information of Assets and Liabilities Measured at Fair Value on Non-recurring Basis (Details) - Level 3 - Fair Value Measurements, Non-recurring	3 Months Ended
	Mar. 31, 2018
Impaired Loans
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Valuation Technique	Appraisals
Impact to Valuation from an Increased or Higher Input Value	Decrease
Impaired Loans | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Appraisal adjustments, sales costs and other discount adjsutments for market conditions	6.00%
Impaired Loans | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Appraisal adjustments, sales costs and other discount adjsutments for market conditions	10.00%
Asset Held For Sale
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Valuation Technique	List price, contract price
Appraisal adjustments, sales costs and other discount adjsutments for market conditions	7.00%
Impact to Valuation from an Increased or Higher Input Value	Decrease
Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Valuation Technique	Appraisals
Impact to Valuation from an Increased or Higher Input Value	Decrease
Other Real Estate Owned | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Appraisal adjustments, sales costs and other discount adjsutments for market conditions	7.00%
Other Real Estate Owned | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Appraisal adjustments, sales costs and other discount adjsutments for market conditions	20.00%

Fair Value Measurement - Sum102

Fair Value Measurement - Summary of Estimated Fair Values of Financial Instruments and Levels Within Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial assets
Cash and due from banks	$ 17,396	$ 19,404
Interest bearing deposits with other banks	110,645	38,945
Securities held-to-maturity, fair value	110,419	117,277
Restricted stock, at cost	17,177	16,343
Loans held for sale	8,219	5,212
Loans and lease receivables, net	2,262,778	2,260,786
Accrued interest receivable	6,971	7,670
Financial liabilities
Federal Home Loan Bank advances	380,000	361,506
Securities sold under agreements to repurchase	27,815	31,187
Junior subordinated debentures issued to capital trusts, net	27,800	27,647
Level 1 | Carrying Amount
Financial assets
Cash and due from banks	17,396	19,404
Level 1 | Estimated Fair Value
Financial assets
Cash and due from banks	17,396	19,404
Level 2 | Carrying Amount
Financial assets
Interest bearing deposits with other banks	110,645	38,945
Securities held-to-maturity, fair value	112,266	117,163
Restricted stock, at cost	17,177	16,343
Financial liabilities
Non-interest bearing deposits	749,892	760,887
Interest bearing deposits	1,774,655	1,682,442
Accrued interest payable	1,612	1,306
Federal Home Loan Bank advances	380,000	361,506
Securities sold under agreements to repurchase	27,815	31,187
Level 2 | Estimated Fair Value
Financial assets
Interest bearing deposits with other banks	110,645	38,945
Securities held-to-maturity, fair value	110,419	117,277
Restricted stock, at cost	17,177	16,343
Financial liabilities
Non-interest bearing deposits	749,892	760,887
Interest bearing deposits	1,769,476	1,678,535
Accrued interest payable	1,612	1,306
Federal Home Loan Bank advances	380,000	361,500
Securities sold under agreements to repurchase	27,815	31,187
Level 3 | Carrying Amount
Financial assets
Loans held for sale	8,219	5,212
Loans and lease receivables, net	2,262,778	2,260,786
Accrued interest receivable	6,971	7,670
Financial liabilities
Junior subordinated debentures issued to capital trusts, net	27,800	27,647
Level 3 | Estimated Fair Value
Financial assets
Loans held for sale	9,122	5,851
Loans and lease receivables, net	2,230,050	2,240,235
Accrued interest receivable	6,971	7,670
Financial liabilities
Junior subordinated debentures issued to capital trusts, net	$ 34,025	$ 33,907

Derivative Instruments and H103

Derivative Instruments and Hedge Activities - Summary of Derivative Financial Instruments and Classification on Consolidated Statements of Financial Condition (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Derivatives Fair Value [Line Items]
Notional Amount	$ 345,373,000	$ 344,726,000
Other Assets	10,500,000	5,981,000
Other Liabilities	1,432,000	994,000
Other Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional Amount	94,123,000
Other Assets	1,453,000
Other Liabilities	1,430,000
Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Cash Flow Hedges
Derivatives Fair Value [Line Items]
Notional Amount	250,000,000	250,000,000
Other Assets	9,047,000	5,030,000
Other Liabilities		38,000
Derivatives Not Designated As Hedging Instruments | Other Credit Derivatives
Derivatives Fair Value [Line Items]
Notional Amount	1,250,000
Other Liabilities	2,000
Derivatives Not Designated As Hedging Instruments | Other Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional Amount	94,123,000	94,726,000
Other Assets	1,453,000	951,000
Other Liabilities	$ 1,430,000	$ 956,000

Derivative Instruments and H104

Derivative Instruments and Hedge Activities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Derivative [Line Items]
Derivative notional amount	$ 345,373,000		$ 344,726,000
Unrealized gain (loss) to be reclassified as an increase to interest expense during the next twelve months	1,800,000
Credit valuation adjustment increase (decrease) to non-interest income	27,000	$ (13,000)
Full collateral posted	11,500
Interest Rate Swaps | Interest Expense
Derivative [Line Items]
Increase (decrease) in FHLB expense	(61,000)	54,000
Other Interest Rate Swaps
Derivative [Line Items]
Derivative notional amount	$ 94,123,000
Derivative maturity date, start year	Jan. 31, 2020
Derivative maturity date, end year	Nov. 30, 2027
Derivative instruments transaction fees	$ 0	$ 113,000
Other Credit Derivative
Derivative [Line Items]
Derivative notional amount	$ 1,300,000
Derivative maturity date	Jan. 31, 2025
Credit valuation adjustment increase (decrease) to non-interest income	$ 23,000
Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	250,000,000		250,000,000
Federal Home Loan Bank Advances | Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	$ 250,000,000		$ 250,000,000

Derivative Instruments and H105

Derivative Instruments and Hedge Activities - Summary of Net Gains (Losses) Recorded in Accumulated Other Comprehensive Income (Loss) and Consolidated Statements of Operations Relating to Cash Flow Derivative Instruments (Details) - Interest Rate Swaps - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Amount of Gain Recognized in OCI (Effective Portion)	$ 4,070	$ (83)
Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense	$ 61
Amount of Loss Reclassified from OCI to Income as an Increase to Interest Expense		$ (54)

Derivative Instruments and H106

Derivative Instruments and Hedge Activities - Summary of Other Interest Rate Swaps (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 345,373,000	$ 344,726,000
Derivative assets fair value	10,500,000	5,981,000
Derivative liabilities fair value	1,432,000	$ 994,000
Other Interest Rate Swaps
Derivative [Line Items]
Notional Amount	94,123,000
Derivative assets fair value	1,453,000
Derivative liabilities fair value	$ 1,430,000
Weighted average pay rates	4.38%
Weighted average receive rates	4.02%
Weighted average maturity	6 years

Derivative Instruments and H107

Derivative Instruments and Hedge Activities - Summary of Company's Interest Rate Derivative and Offsetting Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross amounts recognized	$ 10,500	$ 5,981
Net amount presented in the Consolidated Statements of Financial Condition	10,500	5,981
Gross amounts not offset in the Consolidated Statements of Financial Condition
Offsetting derivative positions		(232)
Collateral posted	(10,500)	(5,371)
Net credit exposure (excess collateral)		378
Gross amounts recognized	1,432	994
Net amount presented in the Consolidated Statements of Financial Condition	1,432	994
Gross amounts not offset in the Consolidated Statements of Financial Condition
Offsetting derivative positions		(232)
Collateral posted	(1,424)	(745)
Net credit exposure (excess collateral)	$ 8	$ 17

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($)	Oct. 03, 2017	Jul. 06, 2017	Apr. 30, 2018	Oct. 31, 2014	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, voting par value					$ 0.01		$ 0.01
Proceeds from the exercise of stock options					$ 1,005,000
Income tax benefit					64,000	$ 113,000
Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Income tax benefit					$ 381,000
Performance Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vested	414,894
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options exercised					86,750
Omnibus Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock reserved and available for issuance										1,550,000
Number of common shares available for future grants					1,479,602
Omnibus Plan | Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forfeiture of restricted stock awards, shares		400
Award vesting period							4 years
Restricted shares vested					0
Fair value of unvested restricted stock awards					$ 1,600,000
Omnibus Plan | Performance-based Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of restricted voting common stock granted			11,165
Period for number of shares earned under retun on average assets			3 years
Minimum target precentage in assets of peer group consisting publicly-traded bank holding companies			50.00%
Maximum target precentage in assets of peer group consisting publicly-traded bank holding companies			200.00%
Omnibus Plan | Performance-based Restricted Shares | Threshold performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target number of shares to be earned			25.00%
Omnibus Plan | Performance-based Restricted Shares | 50th Percentile Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target number of shares to be earned			100.00%
Omnibus Plan | Performance-based Restricted Shares | 75th Percentile Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target number of shares to be earned			125.00%
Omnibus Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock in connection with restricted stock awards, shares		58,900					11,898
Omnibus Plan | Common Stock | Restricted Shares | Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of restricted voting common stock granted			48,943
Common stock, voting par value			$ 0.01
Omnibus Plan | Common Stock | Restricted Shares | Each Anniversary of Grant Date Over Four Years | Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			4 years
Shares vest on grant date			24,345
Omnibus Plan | Common Stock | Restricted Shares | Each Anniversary of Grant Date Vest Over Three Years | Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			3 years
Shares vest on grant date			11,165
Omnibus Plan | Common Stock | Restricted Shares | First Anniversary of Grant Date | Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vest on grant date			2,268
MBG Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options granted							0
Number of options exercised							0
BYB Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common shares available for future grants										0
Number of options granted					0		0	212,400	1,634,568
Number of options exercised					86,750		0
Number of shares outstanding					1,696,270		1,783,020
Award contractual term					7 years 4 months 24 days		7 years 7 months 6 days
Options vested					0
Proceeds from the exercise of stock options					$ 1,000,000
Income tax benefit					$ 264,000
BYB Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common shares available for future grants				2,476,122
BYB Plan | Time Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award contractual term				10 years
BYB Plan | Time Options Grants | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period				5 years
BYB Plan | Time Options Grants | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period				1 year
BYB Plan | Performance Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award contractual term				10 years
BYB Plan | Performance Options Grants | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period				5 years
BYB Plan | Performance Options Grants | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period				1 year

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Changes in Restricted Shares (Details) - Omnibus Plan - Restricted Shares	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, beginning balance	70,398,000
Number of shares, vested	0
Number of shares, ending balance	70,398,000
Weighted average grant date fair value, beginning balance | $ / shares	$ 20.31
Weighted average grant date fair value, ending balance | $ / shares	$ 20.31

Share-Based Compensation - S110

Share-Based Compensation - Summary of Stock Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation - restricted stock	$ 229	$ 286
Income tax benefit	64	113
Unrecognized compensation expense	$ 499	$ 1,466
Weighted-average amortization period remaining	1 year 1 month 6 days	1 year 9 months 18 days
Restricted Shares
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation - restricted stock	$ 112
Income tax benefit	381
Unrecognized compensation expense	$ 1,114
Weighted-average amortization period remaining	2 years 7 months 6 days

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value Assumptions of Stock Options (Details) - BYB Plan - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2016	Mar. 31, 2015
Time Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate, minimum		1.34%	1.68%
Risk-free interest rate, maximum		1.40%	1.85%
Expected stock price volatility		20.39%
Expected stock price volatility, minimum			16.18%
Expected stock price volatility, maximum			16.55%
Expected dividend yield		0.00%	0.00%
Weighted average grant date fair value		$ 3.55	$ 2.25
Time Options Grants | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)		5 years 2 months 12 days	5 years 8 months 12 days
Time Options Grants | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)		5 years 7 months 6 days	6 years 3 months 18 days
Performance Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	Implied forward rates		Implied forward rates
Expected term (years)	Variable		Variable
Expected stock price volatility, minimum		20.34%	16.18%
Expected stock price volatility, maximum		20.39%	16.55%
Expected dividend yield		0.00%	0.00%
Weighted average grant date fair value		$ 3.75	$ 1.65

Share-Based Compensation - S112

Share-Based Compensation - Summary Activity in shares Subjected to Options and Weighted Average Exercise Prices (Details) - BYB Plan - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning balance	1,783,020
Number of Shares, Granted	0	0	212,400	1,634,568
Number of Shares, Exercised	(86,750)	0
Number of Shares, Ending balance	1,696,270	1,783,020
Number of Shares, Exercisable	1,217,507
Weighted Average Exercise Price, Beginning balance	$ 11.91
Weighted Average Exercise Price, Exercised	11.59
Weighted Average Exercise Price, Ending balance	11.93	$ 11.91
Weighted Average Exercise Price, Exercisable	$ 11.50
Intrinsic Value, Beginning balance	$ 19,718
Intrinsic Value, Exercised	949
Intrinsic Value, Ending balance	18,663	$ 19,718
Intrinsic Value, Exercisable	$ 13,917
Weighted Average Remaining Contractual Term (in Years)	7 years 4 months 24 days	7 years 7 months 6 days
Weighted Average Remaining Contractual Term (in Years), Exercisable	7 years 3 months 18 days

Earnings per Share - Additional

Earnings per Share - Additional Information (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share Basic [Line Items]
Shares outstanding	29,291,179	24,616,706
Stock Options
Earnings Per Share Basic [Line Items]
Shares outstanding	1,696,270	1,798,320
Restricted Stock Award
Earnings Per Share Basic [Line Items]
Shares outstanding	70,798	0

Earnings per Share - Schedule o

Earnings per Share - Schedule of Calculation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 6,768	$ 6,560
Dividends on preferred shares	193	189
Net income available to common stockholders	$ 6,575	$ 6,371
Weighted-average common stock outstanding:
Weighted-average common stock outstanding (basic)	29,291,179	24,616,706
Incremental shares	622,454	461,721
Weighted-average common stock outstanding (dilutive)	29,913,633	25,078,427
Basic earnings per common share	$ 0.22	$ 0.26
Diluted earnings per common share	$ 0.22	$ 0.25

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Preferred and Common Stock (Details) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Common stock, voting par value	$ 0.01	$ 0.01
Common stock, voting shares authorized	150,000,000	150,000,000
Common stock, voting shares issued	29,404,048	29,317,298
Common stock, voting shares outstanding	29,404,048	29,317,298
Series B 7.5% Fixed Non-Cumulative Perpetual Preferred Stock
Class Of Stock [Line Items]
Par value	$ 0.01	$ 0.01
Shares authorized	50,000	50,000
Shares issued	10,438	10,438
Shares outstanding	10,438	10,438

Stockholders' Equity - Summa116

Stockholders' Equity - Summary of Preferred and Common Stock (Parenthetical) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Series B 7.5% Fixed Non-Cumulative Perpetual Preferred Stock
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage	7.50%	7.50%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016
Class Of Stock [Line Items]
Dividends declared and paid	$ 193,000	$ 189,000
Series B Preferred Stock
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage			7.50%
Preferred stock, liquidation preference per share			$ 1,000
Dividends declared and paid	$ 193,000	$ 189,000

Consolidated Statements of C118

Consolidated Statements of Change in Accumulated Other Comprehensive Income (Loss) - Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 458,578	$ 382,658
Reclassification of certain income tax effects from accumulated other comprehensive income	(763)
Other comprehensive income (loss), net of tax	(3,564)	368
Ending balance	462,936	389,683
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	2,913	2,233
Reclassification of certain income tax effects from accumulated other comprehensive income	687
Other comprehensive income (loss), net of tax	2,893	(18)
Ending balance	6,493	2,215
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(8,000)	(9,501)
Reclassification of certain income tax effects from accumulated other comprehensive income	(1,450)
Other comprehensive income (loss), net of tax	(6,457)	386
Ending balance	(15,907)	(9,115)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(5,087)	(7,268)
Reclassification of certain income tax effects from accumulated other comprehensive income	(763)
Other comprehensive income (loss), net of tax	(3,564)	368
Ending balance	$ (9,414)	$ (6,900)