Wilson Bank Holding (WBHC) 10-Q 9 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 09, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	WBHC
Entity Registrant Name	WILSON BANK HOLDING CO
Entity Central Index Key	885,275
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		10,449,719

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
Loans	$ 1,735,014	$ 1,689,819
Less: Allowance for loan losses	(23,323)	(22,731)
Net loans	1,711,691	1,667,088
Securities:
Held to maturity, at cost (market value $33,594 and $36,145, respectively)	33,752	36,624
Available-for-sale, at market (amortized cost $299,900 and $319,201, respectively)	296,781	312,585
Total securities	330,533	349,209
Loans held for sale	7,233	14,788
Restricted equity securities	3,012	3,012
Federal funds sold	16,500	0
Total earning assets	2,068,969	2,034,097
Cash and due from banks	117,965	47,918
Bank premises and equipment, net	48,861	44,414
Accrued interest receivable	5,226	6,104
Deferred income tax asset	9,181	10,758
Other real estate	1,883	4,527
Bank owned life insurance	29,057	28,616
Other assets	17,335	16,812
Goodwill	4,805	4,805
Total assets	2,303,282	2,198,051
Liabilities and Stockholders’ Equity
Deposits	2,028,974	1,942,135
Securities sold under repurchase agreements	1,529	736
Accrued interest and other liabilities	12,965	10,560
Total liabilities	2,043,468	1,953,431
Stockholders’ equity:
Common stock, $2.00 par value; authorized 50,000,000 shares, issued and outstanding 10,382,247 and 10,319,673 shares, respectively	20,764	20,639
Additional paid-in capital	63,064	60,541
Retained earnings	177,911	167,523
Net unrealized losses on available-for-sale securities, net of income taxes of $1,194 and $2,533, respectively	(1,925)	(4,083)
Total stockholders’ equity	259,814	244,620
Total liabilities and stockholders’ equity	$ 2,303,282	$ 2,198,051

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Held-to-maturity, market value	$ 33,594	$ 36,145
Available-for-sale, amortized cost	$ 299,900	$ 319,201
Common stock, par value (in dollars per share)	$ 2	$ 2
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	10,382,247	10,319,673
Common stock, shares, outstanding	10,382,247	10,319,673
Net unrealized losses on available-for-sale securities, income taxes	$ 1,194	$ 2,533

Consolidated Statements of Earn

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest income:
Interest and fees on loans	$ 20,924	$ 18,936	$ 40,869	$ 37,449
Interest and dividends on securities:
Taxable securities	1,351	1,445	2,634	2,856
Exempt from Federal income taxes	308	269	645	501
Interest on loans held for sale	67	85	133	159
Interest on Federal funds sold	63	111	104	188
Interest Income, Deposits with Financial Institutions	123	0	178	0
Interest and dividends on restricted securities	35	31	66	61
Total interest income	22,871	20,877	44,629	41,214
Interest expense:
Interest on negotiable order of withdrawal accounts	311	352	630	728
Interest on money market and savings accounts	484	514	930	999
Interest on time deposits	1,298	1,238	2,548	2,487
Interest on federal funds purchased	0	2	8	2
Interest on securities sold under repurchase agreements	1	0	2	1
Total interest expense	2,094	2,106	4,118	4,217
Net interest income before provision for loan losses	20,777	18,771	40,511	36,997
Provision for loan losses	420	82	809	149
Net interest income after provision for loan losses	20,357	18,689	39,702	36,848
Non-interest income:
Service charges on deposit accounts	1,494	1,398	2,923	2,734
Other fees and commissions	3,530	2,657	6,171	5,067
Income on BOLI and annuity contracts	219	161	441	285
Gain on sale of loans	1,114	1,230	2,090	1,897
Gain on the sale of fixed assets	8	0	8	0
Gain on sale of other real estate	30	324	54	373
Gain on sale of securities	0	126	0	243
Total non-interest income	6,395	5,896	11,687	10,599
Non-interest expense:
Salaries and employee benefits	9,024	8,488	17,871	16,681
Occupancy expenses, net	934	856	1,785	1,694
Furniture and equipment expense	524	515	1,044	1,034
Data processing expense	735	688	1,381	1,361
Directors’ fees	151	162	313	338
Other operating expenses	3,996	3,713	7,207	7,079
Loss on the sale of securities	0	0	38	0
Loss on sale of other assets	2	1	2	1
Total non-interest expense	15,366	14,423	29,641	28,188
Earnings before income taxes	11,386	10,162	21,748	19,259
Income taxes	4,398	3,892	8,265	7,346
Net earnings	$ 6,988	$ 6,270	$ 13,483	$ 11,913
Weighted average number of common shares outstanding-basic	10,381,860	10,257,536	10,371,377	10,248,742
Weighted average number of common shares outstanding-diluted	10,387,076	10,262,316	10,376,408	10,253,596
Basic earnings per common share (in dollars per share)	$ 0.67	$ 0.61	$ 1.30	$ 1.16
Diluted earnings per common share (in dollars per share)	0.67	0.61	1.30	1.16
Dividends per share (in dollars per share)	$ 0	$ 0	$ 0.30	$ 0.26

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 6,988	$ 6,270	$ 13,483	$ 11,913
Other comprehensive earnings (loss), net of tax:
Unrealized gains on available-for-sale securities arising during period, net of taxes of $1,381, $603, $1,324 and $1,706, respectively	2,224	971	2,135	2,751
Reclassification adjustment for net losses (gains) included in net earnings, net of taxes of $0, $48, $15 and $93, respectively	0	(78)	23	(150)
Other comprehensive earnings	2,224	893	2,158	2,601
Comprehensive earnings	$ 9,212	$ 7,163	$ 15,641	$ 14,514

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Earnings (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Unrealized gains on available-for-sale securities arising during period, tax expense	$ 1,381	$ 603	$ 1,324	$ 1,706
Reclassification adjustment for net losses (gains) included in net earnings, income tax (expense) benefit	$ 0	$ (48)	$ 15	$ (93)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Interest received	$ 46,846	$ 42,510
Fees and commissions received	9,094	7,801
Proceeds from sale of loans held for sale	70,214	76,372
Origination of loans held for sale	(60,569)	(78,878)
Interest paid	(4,220)	(4,250)
Cash paid to suppliers and employees	(24,622)	(22,953)
Income taxes paid	(9,447)	(6,744)
Net cash provided by operating activities	27,296	13,858
Cash flows from investing activities:
Proceeds from maturities, calls, and principal payments of held-to-maturity securities	2,737	1,972
Proceeds from maturities, calls, and principal payments of available-for-sale securities	18,176	53,650
Proceeds from the sale of available-for-sale securities	12,446	41,433
Purchase of held-to-maturity securities	0	(8,786)
Purchase of available-for-sale securities	(12,563)	(103,819)
Loans made to customers, net of repayments	(45,299)	(112,069)
Purchase of bank owned life insurance and annuity contracts	0	(1,916)
Purchase of premises and equipment	(5,863)	(1,554)
Proceeds from sale of other real estate	2,583	522
Proceeds from sale of other assets	1	15
Net cash used in investing activities	(27,782)	(130,552)
Cash flows from financing activities:
Net increase in non-interest bearing, savings and NOW deposit accounts	70,427	96,930
Net increase (decrease) in time deposits	16,412	(3,022)
Net increase (decrease) in securities sold under repurchase agreements	793	(1,033)
Dividends paid	(3,096)	(2,678)
Proceeds from sale of common stock pursuant to dividend reinvestment	2,398	1,967
Proceeds from exercise of stock options	99	112
Net cash provided by financing activities	87,033	92,276
Net increase (decrease) in cash and cash equivalents	86,547	(24,418)
Cash and cash equivalents at beginning of period	47,918	109,253
Cash and cash equivalents at end of period	134,465	84,835
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	13,483	11,913
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation, amortization, and accretion	2,763	2,607
Provision for loan losses	809	149
Gain on sale of other real estate	(54)	(373)
Losses (gains) on sale of securities	38	(243)
Stock-based compensation expense	152	20
Loss on sale of other assets	2	1
Gain on the sale of bank premises and equipment	(8)	0
Decrease (increase) in loans held for sale	7,555	(4,403)
Decrease (increase) in deferred tax asset	238	(650)
Increase in other assets, bank owned life insurance and annuity contract earnings, net	(965)	(1,747)
Decrease in interest receivable	878	81
Increase in other liabilities	3,927	5,284
Increase (decrease) in taxes payable	(1,420)	1,252
Decrease in interest payable	(102)	(33)
Total adjustments	13,813	1,945
Net cash provided by operating activities	27,296	13,858
Supplemental schedule of non-cash activities:
Unrealized gain in value of securities available-for-sale, net of taxes of $1,339 and $1,613 for the six months ended June 30, 2017 and 2016, respectively	2,158	2,601
Non-cash transfers from loans to other real estate	80	696
Non-cash transfers from other real estate to loans	195	1,050
Non-cash transfers from loans to other assets	$ 2	$ 16

Consolidated Statements of Cas8

Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
Unrealized gain (loss) in values of securities available-for-sale, taxes	$ 1,339	$ 1,613

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Nature of Business — Wilson Bank Holding Company (the “Company”) is a bank holding company whose primary business is conducted by its wholly-owned subsidiary, Wilson Bank & Trust (the “Bank”). The Bank is a commercial bank headquartered in Lebanon, Tennessee. The Bank provides a full range of banking services in its primary market areas of Wilson, Davidson, Rutherford, Trousdale, Sumner, Dekalb, Putnam and Smith Counties, Tennessee. Basis of Presentation — The accompanying unaudited, consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated audited financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2016 . These consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary. Significant intercompany transactions and accounts are eliminated in consolidation. Use of Estimates — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for loan losses, the valuation of deferred tax assets, determination of any impairment of intangibles, other-than-temporary impairment of securities, the valuation of other real estate, and the fair value of financial instruments. These financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . There have been no significant changes to the Company’s significant accounting policies as disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . Loans — Loans are reported at their outstanding principal balances less unearned income, the allowance for loan losses and any deferred fees or costs on originated loans. Interest income on loans is accrued based on the principal balance outstanding. Loan origination fees, net of certain loan origination costs, are deferred and recognized as an adjustment to the related loan yield using a method which approximates the interest method. Loans are charged off when management believes that the full collectability of the loan is unlikely. As such, a loan may be partially charged-off after a “confirming event” has occurred which serves to validate that full repayment pursuant to the terms of the loan is unlikely. Loans are placed on nonaccrual status when there is a significant deterioration in the financial condition of the borrower, which often is determined when the principal or interest on the loan is more than 90 days past due, unless the loan is both well-secured and in the process of collection. Generally, all interest accrued but not collected for loans that are placed on nonaccrual status, is reversed against current income. Interest income is subsequently recognized only to the extent cash payments are received while the loan is classified as nonaccrual, but interest income recognition is reviewed on a case-by-case basis. A nonaccrual loan is returned to accruing status once the loan has been brought current and collection is reasonably assured or the loan has been “well-secured” through other techniques. Past due status is determined based on the contractual due date per the underlying loan agreement. All loans that are placed on nonaccrual are further analyzed to determine if they should be classified as impaired loans. At December 31, 2016 and at June 30, 2017 , there were no loans classified as nonaccrual that were not also deemed to be impaired except for those loans not individually evaluated for impairment as described below. A loan is considered to be impaired when it is probable the Company will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan. This determination is made using a variety of techniques, which include a review of the borrower’s financial condition, debt-service coverage ratios, global cash flow analysis, guarantor support, other loan file information, meetings with borrowers, inspection or reappraisal of collateral and/or consultation with legal counsel as well as results of reviews of other similar industry credits (e.g. builder loans, development loans, church loans, etc). Loans with an identified weakness and principal balance of $500,000 or more are subject to individual identification for impairment. Individually identified impaired loans are measured based on the present value of expected payments using the loan’s original effective rate as the discount rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a specific valuation allowance is established as a component of the allowance for loan losses or, in the case of collateral dependent loans, the excess may be charged off. Changes to the valuation allowance are recorded as a component of the provision for loan losses. Any subsequent adjustments to present value calculations for impaired loan valuations as a result of the passage of time, such as changes in the anticipated payback period for repayment, are recorded as a component of the provision for loan losses. For loans less than $500,000 , the Company assigns a valuation allowance to these loans utilizing an allocation rate equal to the allocation rate calculated for non-impaired loans of a similar type. Allowance for Loan Losses — The allowance for loan losses is maintained at a level that management believes to be adequate to absorb probable losses in the loan portfolio. Loan losses are charged against the allowance when they are known. Subsequent recoveries are credited to the allowance. Management’s determination of the adequacy of the allowance is based on an evaluation of the portfolio, current economic conditions, volume, growth, composition of the loan portfolio, homogeneous pools of loans, risk ratings of specific loans, historical loan loss factors, loss experience of various loan segments, identified impaired loans and other factors related to the portfolio. This evaluation is performed quarterly and is inherently subjective, as it requires material estimates that are susceptible to significant change including the amounts and timing of future cash flows expected to be received on any impaired loans. In assessing the adequacy of the allowance, we also consider the results of our ongoing independent loan review process. We undertake this process both to ascertain whether there are loans in the portfolio whose credit quality has weakened over time and to assist in our overall evaluation of the risk characteristics of the entire loan portfolio. Our loan review process includes the judgment of management, independent loan reviewers, and reviews that may have been conducted by third-party reviewers. We incorporate relevant loan review results in the loan impairment determination. In addition, regulatory agencies, as an integral part of their examination process, will periodically review the Company’s allowance for loan losses, and may require the Company to record adjustments to the allowance based on their judgment about information available to them at the time of their examinations. Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 was originally going to be effective for us on January 1, 2017; however, ASU 2015-14, “Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date" deferred the effective date of ASU 2014-09 by one year to January 1, 2018. Based on our analysis of the potential impact of ASU 2014-09, we do not expect this update to have a material impact on the Company’s consolidated financial statements. In January 2016, the FASB issued ASU 2016-1, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-1, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (viii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. ASU 2016-1 will be effective for us on January 1, 2018 and is not expected to have a significant impact on our financial statements. In February 2016, FASB issued ASU 2016-02, "Leases (Topic 842)." The amendments in this ASU are effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. As a result of the amendment, lessees will need to recognize a right-of-use asset and a lease liability for virtually all of their leases (other than leases that meet the definition of a short-term lease). The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustments, such as adjustments for initial direct costs. For income statement purposes, FASB retained a dual model, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. We currently do not expect this ASU to have a material impact on our consolidated financial statements. In March 2016, FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." The amendments in this ASU simplify several aspects of the accounting for share-based payment award transactions, including: (1) income tax consequences; (2) classification of awards as either equity or liabilities, and (3) classification on the statement of cash flows. For public companies, like the Company, the amendments in this ASU are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We elected to adopt the provisions of ASU 2016-09 during the first quarter of 2016 in advance of the required application date of January 1, 2017. The adoption of ASU 2016-09 did not have a material impact on our consolidated statements of earnings for the six months ended June 30, 2017 and 2016. In June 2016, FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective on January 1, 2020. We are currently evaluating the potential impact of ASU 2016-13 on our financial statements. We are also evaluating the sufficiency of current systems and data needed to comply with this ASU. In August 2016, FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 clarifies how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230. The update addresses eight specific cash flow issues including, but not limited to, proceeds from the settlement of bank-owned life insurance policies, with the objective of reducing the existing diversity in practice. ASU 2016-15 will be effective on January 1, 2018. We are currently evaluating the potential impact of ASU 2016-15 on our financial statements. In March 2017, FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 provides guidance on the amortization period for certain purchased callable debt securities held at a premium. This update shortens the amortization period for the premium to the earliest call date. Under current generally accepted accounting principles, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument related to certain cash flow issues in order to reduce the current and potential future diversity in practice. ASU 2017-08 will be effective for us on January 1, 2019. We are currently evaluating the potential impact of ASU 2017-08 on our financial statements. Other than those previously discussed, there were no other recently issued accounting pronouncements that may materially impact the Company.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses For financial reporting purposes, the Company classifies its loan portfolio based on the underlying collateral utilized to secure each loan. This classification is consistent with those utilized in the Quarterly Report of Condition and Income filed by the Bank with the Federal Deposit Insurance Corporation (“FDIC”). The following schedule details the loans of the Company at June 30, 2017 and December 31, 2016 : (In Thousands) June 30, December 31, Mortgage loans on real estate Residential 1-4 family $ 410,312 $ 393,268 Multifamily 108,994 109,410 Commercial 663,102 689,695 Construction and land development 352,725 297,315 Farmland 42,136 46,314 Second mortgages 8,440 9,193 Equity lines of credit 57,988 56,038 Total mortgage loans on real estate 1,643,697 1,601,233 Commercial loans 49,257 40,301 Agricultural loans 1,442 1,562 Consumer installment loans Personal 35,247 41,117 Credit cards 3,205 3,157 Total consumer installment loans 38,452 44,274 Other loans 9,690 9,055 Total loans before net deferred loan fees 1,742,538 1,696,425 Net deferred loan fees (7,524 ) (6,606 ) Total loans 1,735,014 1,689,819 Less: Allowance for loan losses (23,323 ) (22,731 ) Net loans $ 1,711,691 $ 1,667,088 Risk characteristics relevant to each portfolio segment are as follows: Construction and land development: Loans for non-owner-occupied real estate construction or land development are generally repaid through cash flow related to the operation, sale or refinance of the property. The Company also finances construction loans for owner-occupied properties. A portion of the Company’s construction and land portfolio segment is comprised of loans secured by residential product types (residential land and single-family construction). With respect to construction loans to developers and builders that are secured by non-owner occupied properties that the Company may originate from time to time, the Company generally requires the borrower to have had an existing relationship with the Company and have a proven record of success. Construction and land development loans are underwritten utilizing independent appraisal reviews, sensitivity analysis of absorption and lease rates, market sales activity, and financial analysis of the developers and property owners. Construction loans are generally based upon estimates of costs and value associated with the complete project. These estimates may be inaccurate. Construction loans often involve the disbursement of substantial funds with repayments substantially dependent on the success of the ultimate project. Sources of repayment for these types of loans may be pre-committed permanent loans from approved long-term lenders, sales of developed property or an interim loan commitment from the Company until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their ultimate repayment being sensitive to interest rate changes, governmental regulation of real property, general economic conditions and the availability of long-term financing. 1-4 family residential real estate: Residential real estate loans represent loans to consumers or investors to finance a residence. These loans are typically financed on 15 to 30 year amortization terms, but generally with shorter maturities of 5 to 15 years. Many of these loans are extended to borrowers to finance their primary or secondary residence. Loans to an investor secured by a 1-4 family residence will be repaid from either the rental income from the property or from the sale of the property. This loan segment also includes closed-end home equity loans that are secured by a first or second mortgage on the borrower’s residence. This allows customers to borrow against the equity in their home. Loans in this portfolio segment are underwritten and approved based on a number of credit quality criteria including limits on maximum Loan-to-Value ("LTV"), minimum credit scores, and maximum debt to income. Real estate market values as of the time the loan is made directly affect the amount of credit extended and, in addition, changes in these residential property values impact the depth of potential losses in this portfolio segment. 1-4 family HELOC: This loan segment includes open-end home equity loans that are secured by a first or second mortgage on the borrower’s residence. This allows customers to borrow against the equity in their home utilizing a revolving line of credit. These loans are underwritten and approved based on a number of credit quality criteria including limits on maximum LTV, minimum credit scores, and maximum debt to income. Real estate market values as of the time the loan is made directly affect the amount of credit extended and, in addition, changes in these residential property values impact the depth of potential losses in this portfolio segment. Because of the revolving nature of these loans, as well as the fact that many represent second mortgages, this portfolio segment can contain more risk than the amortizing 1-4 family residential real estate loans. Multi-family and commercial real estate: Multi-family and commercial real estate loans are subject to underwriting standards and processes similar to commercial and industrial loans, in addition to those of real estate loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally largely dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s commercial real estate portfolio are diverse in terms of type. This diversity helps reduce the Company’s exposure to adverse economic events that affect any single market or industry. Management monitors and evaluates commercial real estate loans based on collateral, geography and risk grade criteria. The Company also utilizes third-party experts to provide insight and guidance about economic conditions and trends affecting the market areas it serves. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. Non-owner occupied commercial real estate loans are loans secured by multifamily and commercial properties where the primary source of repayment is derived from rental income associated with the property (that is, loans for which 50 percent or more of the source of repayment comes from third party, nonaffiliated, rental income) or the proceeds of the sale, refinancing, or permanent financing of the property. These loans are made to finance income-producing properties such as apartment buildings, office and industrial buildings, and retail properties. Owner-occupied commercial real estate loans are loans where the primary source of repayment is the cash flow from the ongoing operations and business activities conducted by the party, or affiliate of the party, who owns the property. Commercial and Industrial: The commercial and industrial loan portfolio segment includes commercial and industrial loans to commercial customers for use in normal business operations to finance working capital needs, equipment purchases or other expansion projects. Collection risk in this portfolio is driven by the creditworthiness of underlying borrowers, particularly cash flow from customers’ business operations. Commercial and industrial loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and usually incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Consumer: The consumer loan portfolio segment includes non-real estate secured direct loans to consumers for household, family, and other personal expenditures. Consumer loans may be secured or unsecured and are usually structured with short or medium term maturities. These loans are underwritten and approved based on a number of consumer credit quality criteria including limits on maximum LTV on secured consumer loans, minimum credit scores, and maximum debt to income. Many traditional forms of consumer installment credit have standard monthly payments and fixed repayment schedules of one to five years. These loans are made with either fixed or variable interest rates that are based on specific indices. Installment loans fill a variety of needs, such as financing the purchase of an automobile, a boat, a recreational vehicle or other large personal items, or for consolidating debt. These loan may be unsecured or secured by an assignment of title, as in an automobile loan, or by money in a bank account. In addition to consumer installment loans, this portfolio segment also includes secured and unsecured personal lines of credit as well as overdraft protection lines. Loans in this portfolio segment are sensitive to unemployment and other key consumer economic measures. The adequacy of the allowance for loan losses is assessed at the end of each calendar quarter. The level of the allowance is based upon evaluation of the loan portfolio, past loan loss experience, current asset quality trends, known and inherent risks in the portfolio, adverse situations that may affect the borrowers’ ability to repay (including the timing of future payment), the estimated value of any underlying collateral, composition of the loan portfolio, economic conditions, historical loss experience, industry and peer bank loan quality indications and other pertinent factors, including regulatory recommendations. Transactions in the allowance for loan losses for the six months ended June 30, 2017 and year ended December 31, 2016 are summarized as follows: (In Thousands) Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total June 30, 2017 Allowance for loan losses: Beginning balance $ 4,571 839 9,541 5,387 658 112 675 386 562 22,731 Provision 618 306 (76 ) (277 ) (63 ) (7 ) 9 41 258 809 Charge-offs (112 ) — — — (3 ) (11 ) — — (468 ) (594 ) Recoveries 17 — 89 39 — 3 1 2 226 377 Ending balance $ 5,094 1,145 9,554 5,149 592 97 685 429 578 23,323 Ending balance individually evaluated for impairment $ 134 — 300 — — — — — — 434 Ending balance collectively evaluated for impairment $ 4,960 1,145 9,254 5,149 592 97 685 429 578 22,889 Loans: Ending balance $ 410,312 108,994 663,102 352,725 42,136 8,440 57,988 49,257 49,584 1,742,538 Ending balance individually evaluated for impairment $ 735 — 4,043 1,438 — — — — — 6,216 Ending balance collectively evaluated for impairment $ 409,577 108,994 659,059 351,287 42,136 8,440 57,988 49,257 49,584 1,736,322 Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total December 31, 2016 Allowance for loan losses: Beginning balance $ 5,024 619 9,986 5,136 654 106 594 301 480 22,900 Provision (400 ) 220 (399 ) 283 2 2 66 81 524 379 Charge-offs (109 ) — (100 ) (66 ) — — — (11 ) (674 ) (960 ) Recoveries 56 — 54 34 2 4 15 15 232 412 Ending balance $ 4,571 839 9,541 5,387 658 112 675 386 562 22,731 Ending balance individually evaluated for impairment $ 196 — 120 — — — — — — 316 Ending balance collectively evaluated for impairment $ 4,375 839 9,421 5,387 658 112 675 386 562 22,415 Loans: Ending balance $ 393,268 109,410 689,695 297,315 46,314 9,193 56,038 40,301 54,891 1,696,425 Ending balance individually evaluated for impairment $ 679 — 4,689 1,618 103 — — — — 7,089 Ending balance collectively evaluated for impairment $ 392,589 109,410 685,006 295,697 46,211 9,193 56,038 40,301 54,891 1,689,336 Impaired Loans At June 30, 2017 , the Company had certain impaired loans of $ 2.7 million which were on non-accruing interest status. At December 31, 2016 , the Company had certain impaired loans of $3.0 million which were on non-accruing interest status. In each case, at the date such loans were placed on nonaccrual status, the Company reversed all previously accrued interest income against current year earnings. The following table presents the Company’s impaired loans at June 30, 2017 and December 31, 2016 . In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized June 30, 2017 With no related allowance recorded: Residential 1-4 family $ 251 299 — 200 7 Multifamily — — — — — Commercial real estate 906 902 — 911 20 Construction 1,443 1,438 — 1,483 34 Farmland — — — 51 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 2,600 2,639 — 2,645 61 With allowance recorded: Residential 1-4 family $ 487 661 134 513 16 Multifamily — — — — — Commercial real estate 3,141 3,141 300 3,141 9 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 3,628 3,802 434 3,654 25 Total Residential 1-4 family $ 738 960 134 713 23 Multifamily — — — — — Commercial real estate 4,047 4,043 300 4,052 29 Construction 1,443 1,438 — 1,483 34 Farmland — — — 51 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 6,228 6,441 434 6,299 86 In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized December 31, 2016 With no related allowance recorded: Residential 1-4 family $ 150 148 — 150 7 Multifamily — — — — — Commercial real estate 4,248 4,246 — 4,352 38 Construction 1,623 1,618 — 1,778 82 Farmland 104 103 — 79 5 Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 6,125 6,115 — 6,359 132 With allowance recorded: Residential 1-4 family $ 540 531 196 540 32 Multifamily — — — — — Commercial real estate 443 443 120 111 5 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 983 974 316 651 37 Total: Residential 1-4 family $ 690 679 196 690 39 Multifamily — — — — — Commercial real estate 4,691 4,689 120 4,463 43 Construction 1,623 1,618 — 1,778 82 Farmland 104 103 — 79 5 Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 7,108 7,089 316 7,010 169 Impaired loans also include loans that the Company may elect to formally restructure due to the weakening credit status of a borrower such that the restructuring may facilitate a repayment plan that minimizes the potential losses that the Company may otherwise incur. These loans are classified as impaired loans and, if on non-accruing status as of the date of restructuring, the loans are included in the nonperforming loan balances. Not included in nonperforming loans are loans that have been restructured that were performing as of the restructure date. Troubled Debt Restructuring The Bank’s loan portfolio includes certain loans that have been modified in a troubled debt restructuring ("TDR"), where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties. These concessions typically result from the Bank’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months. The following table summarizes the carrying balances of TDRs at June 30, 2017 and December 31, 2016 . June 30, 2017 December 31, 2016 (In thousands) Performing TDRs $ 3,485 $ 3,277 Nonperforming TDRs 1,026 1,319 Total TDRS $ 4,511 $ 4,596 The following table outlines the amount of each troubled debt restructuring categorized by loan classification for the six months ended June 30, 2017 and the year ended December 31, 2016 (in thousands, except for number of contracts): June 30, 2017 December 31, 2016 Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Residential 1-4 family 4 $ 311 $ 311 4 $ 130 $ 130 Multifamily — — — — — — Commercial real estate — — — 2 1,364 1,244 Construction — — — — — — Farmland 1 86 86 1 103 103 Second mortgages — — — — — — Equity lines of credit — — — — — — Commercial — — — — — — Agricultural, installment and other 1 3 3 2 17 17 Total 6 $ 400 $ 400 9 $ 1,614 $ 1,494 As of June 30, 2017 and December 31, 2016 , the Company had no loan relationships that had been previously classified as a TDR subsequently default within twelve months of restructuring. A default is defined as an occurrence which violates the terms of the receivable’s contract. As of June 30, 2017 and December 31, 2016 , the Company’s recorded investment in consumer mortgage loans in the process of foreclosure amounted to $308,000 and $389,000 , respectively. Potential problem loans, which include nonperforming loans, amounted to approximately $16.2 million at June 30, 2017 and December 31, 2016 . Potential problem loans represent those loans with a well-defined weakness and where information about possible credit problems of borrowers has caused management to have serious doubts about the borrower’s ability to comply with present repayment terms. This definition is believed to be substantially consistent with the standards established by the FDIC, the Bank’s primary federal regulator, for loans classified as special mention, substandard, or doubtful. The following summary presents our loan balances by primary loan classification and the amount classified within each risk rating category. Pass rated loans include all credits other than those included in special mention, substandard and doubtful which are defined as follows: • Special mention loans have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Bank’s credit position at some future date. • Substandard loans are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. • Doubtful loans have all the characteristics of substandard loans with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The Bank considers all doubtful loans to be impaired and places such loans on nonaccrual status. The following table is a summary of the Bank’s loan portfolio by risk rating at June 30, 2017 and December 31, 2016 : (In Thousands) Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, installment and other Total June 30, 2017 Credit Risk Profile by Internally Assigned Rating Pass $ 401,120 108,994 658,135 352,426 41,299 7,994 57,772 49,254 49,366 1,726,360 Special Mention 5,886 — 839 86 151 295 64 3 101 7,425 Substandard 3,306 — 4,128 213 686 151 152 — 117 8,753 Doubtful — — — — — — — — — — Total $ 410,312 108,994 663,102 352,725 42,136 8,440 57,988 49,257 49,584 1,742,538 December 31, 2016 Credit Risk Profile by Internally Assigned Rating Pass $ 384,383 109,410 684,202 297,089 45,470 8,775 55,883 40,301 54,754 1,680,267 Special Mention 5,616 — 668 121 147 303 — — 26 6,881 Substandard 3,269 — 4,825 105 697 115 155 — 111 9,277 Doubtful — — — — — — — — — — Total $ 393,268 109,410 689,695 297,315 46,314 9,193 56,038 40,301 54,891 1,696,425

Debt and Equity Securities

Debt and Equity Securities	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Debt and Equity Securities	Debt and Equity Securities Debt and equity securities have been classified in the consolidated balance sheet according to management’s intent. Debt and equity securities at June 30, 2017 and December 31, 2016 are summarized as follows: June 30, 2017 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs)* $ 64,147 $ 11 $ 1,476 $ 62,682 Mortgage-backed: GSE residential 159,569 738 1,418 158,889 Asset-backed: SBAP 30,345 28 421 29,952 Obligations of states and political subdivisions 45,839 185 766 45,258 $ 299,900 $ 962 $ 4,081 $ 296,781 June 30, 2017 Securities Held-to-Maturity In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Mortgage-backed: Government-sponsored enterprises (GSEs)* residential $ 11,073 $ 51 $ 121 $ 11,003 Obligations of states and political subdivisions 22,679 161 249 22,591 $ 33,752 $ 212 $ 370 $ 33,594 * Such as Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, Federal Home Loan Bank, Federal Farm Credit Bank, and Government National Mortgage Association. December 31, 2016 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs)* $ 61,879 $ — $ 2,391 $ 59,488 Mortgage-backed: GSE residential 166,316 496 2,447 164,365 Asset-backed: SBAP 37,577 9 729 36,857 Obligations of states and political subdivisions 53,429 52 1,606 51,875 $ 319,201 $ 557 $ 7,173 $ 312,585 December 31, 2016 Securities Held-To-Maturity In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Mortgage-backed: Government-sponsored enterprises (GSEs)* residential $ 11,856 $ 48 $ 230 $ 11,674 Obligations of states and political subdivisions 24,768 142 439 24,471 $ 36,624 $ 190 $ 669 $ 36,145 * Such as Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, Federal Home Loan Bank, Federal Farm Credit Bank, and Government National Mortgage Association. The amortized cost and estimated market value of debt securities at June 30, 2017 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Held-to-Maturity Available-For-Sale In Thousands Amortized Cost Estimated Market Value Amortized Cost Estimated Market Value Due in one year or less $ 3,305 $ 3,311 $ 100 $ 100 Due after one year through five years 7,558 7,632 25,152 24,969 Due after five years through ten years 9,871 9,741 120,594 119,192 Due after ten years 13,018 12,910 154,054 152,520 $ 33,752 $ 33,594 $ 299,900 $ 296,781 The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2017 and December 31, 2016 . In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total June 30, 2017 Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Held-to-Maturity Securities: Mortgage-backed: Government-sponsored enterprises (GSEs) residential $ 5,367 $ 30 5 $ 3,154 $ 91 2 $ 8,521 $ 121 Obligations of states and political subdivisions 10,186 249 25 — — — 10,186 249 $ 15,553 $ 279 30 $ 3,154 $ 91 2 $ 18,707 $ 370 Available-for-Sale Securities: GSEs $ 58,822 $ 1,426 23 $ 2,700 $ 50 1 $ 61,522 $ 1,476 Mortgage-backed: GSE residential 93,394 1,282 52 7,484 136 9 100,878 1,418 Asset-backed: SBAP 24,249 421 13 — — — 24,249 421 Obligations of states and political subdivisions 26,266 720 69 2,142 46 3 28,408 766 $ 202,731 $ 3,849 157 $ 12,326 $ 232 13 $ 215,057 $ 4,081 In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total Fair Unrealized Number of Securities Fair Unrealized Number of Securities Fair Unrealized December 31, 2016 Value Losses Included Value Losses Included Value Losses Held-to-Maturity Securities: Mortgage-backed: Government-sponsored enterprises (GSEs) residential $ 8,177 $ 151 7 $ 1,704 $ 79 1 $ 9,881 $ 230 Obligations of states and political subdivisions 16,081 439 41 — — — 16,081 439 $ 24,258 $ 590 48 $ 1,704 $ 79 1 $ 25,962 $ 669 Available-for-Sale Securities: GSEs $ 59,488 $ 2,391 23 $ — $ — — $ 59,488 $ 2,391 Mortgage-backed: GSE residential 124,011 2,350 64 6,918 97 9 130,929 2,447 Asset-backed: SBAP 33,579 729 17 — — — 33,579 729 Obligations of states and political subdivisions 42,801 1,606 116 — — — 42,801 1,606 $ 259,879 $ 7,076 220 $ 6,918 $ 97 9 $ 266,797 $ 7,173 Unrealized losses on securities have not been recognized into income because the Company does not consider these securities to be other-than-temporarily impaired at June 30, 2017 , as the issuers’ securities are of high credit quality, management does not intend to sell the securities and it is not more likely than not that management will be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely due to changes in interest rates and other market conditions. The issuers continue to make timely principal and interest payment on the securities. The fair value is expected to recover as the securities approach maturity. The carrying values of the Company’s investment securities could decline in the future if the financial condition of issuers deteriorates and management determines it is probable that the Company will not recover the entire amortized cost bases of the securities. As a result, there is a risk that other-than-temporary impairment charges may occur in the future given the current economic environment.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The computation of basic earnings per share is based on the weighted average number of common shares outstanding during the period, adjusted for stock splits. The computation of diluted earnings per share for the Company begins with the basic earnings per share plus the effect of common shares contingently issuable from stock options. The following is a summary of components comprising basic and diluted earnings per share (“EPS”) for the three and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in Thousands Except Share and Per Share Amounts) (Dollars in Thousands Except Share and Per Share Amounts) Basic EPS Computation*: Numerator – Earnings available to common stockholders $ 6,988 $ 6,270 $ 13,483 $ 11,913 Denominator – Weighted average number of common shares outstanding 10,381,860 10,257,536 10,371,377 10,248,742 Basic earnings per common share $ 0.67 $ 0.61 $ 1.30 $ 1.16 Diluted EPS Computation*: Numerator – Earnings available to common stockholders $ 6,988 $ 6,270 $ 13,483 $ 11,913 Denominator – Weighted average number of common shares outstanding 10,381,860 10,257,536 10,371,377 10,248,742 Dilutive effect of stock options 5,216 4,780 5,031 4,854 Weighted average diluted common shares outstanding 10,387,076 10,262,316 10,376,408 10,253,596 Diluted earnings per common share $ 0.67 $ 0.61 $ 1.30 $ 1.16 * Adjusted for 4 for 3 stock split effective on March 30, 2016.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Accounting Standards Codification (“ASC”) 740, Income Taxes , defines the threshold for recognizing the benefits of tax return positions in the financial statements as “more-likely-than-not” to be sustained by the taxing authority. This section also provides guidance on the derecognition, measurement and classification of income tax uncertainties, along with any related interest and penalties, and includes guidance concerning accounting for income tax uncertainties in interim periods. As of June 30, 2017 , the Company had no unrecognized tax benefits related to Federal or state income tax matters and does not anticipate any material increase or decrease in unrecognized tax benefits relative to any tax positions taken prior to June 30, 2017 . As of June 30, 2017 , the Company has accrued no interest and no penalties related to uncertain tax positions. The Company’s policy is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company and its subsidiaries file consolidated U.S. Federal and State of Tennessee income tax returns. The Company is currently open to audit under the statute of limitations by the State of Tennessee for the years ended December 31, 2013 through 2016 and the IRS for the years ended December 31, 2014 through 2016 .

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities In the normal course of business, the Bank has entered into off-balance sheet financial instruments which include commitments to extend credit (i.e., including unfunded lines of credit) and standby letters of credit. Commitments to extend credit are usually the result of lines of credit granted to existing borrowers under agreements that the total outstanding indebtedness will not exceed a specific amount during the term of the indebtedness. Typical borrowers are commercial concerns that use lines of credit to supplement their treasury management functions, thus their total outstanding indebtedness may fluctuate during any time period based on the seasonality of their business and the resultant timing of their cash flows. Other typical lines of credit are related to home equity loans granted to consumers. Commitments to extend credit generally have fixed expiration dates or other termination clauses and may require payment of a fee. Standby letters of credit are generally issued on behalf of an applicant (our customer) to a specifically named beneficiary and are the result of a particular business arrangement that exists between the applicant and the beneficiary. Standby letters of credit have fixed expiration dates and are usually for terms of two years or less unless terminated sooner due to criteria specified in the standby letter of credit. A typical arrangement involves the applicant routinely being indebted to the beneficiary for such items as inventory purchases, insurance, utilities, lease guarantees or other third party commercial transactions. The standby letter of credit would permit the beneficiary to obtain payment from the Bank under certain prescribed circumstances. Subsequently, the Bank would then seek reimbursement from the applicant pursuant to the terms of the standby letter of credit. The Bank follows the same credit policies and underwriting practices when making these commitments as it does for on-balance sheet instruments. Each customer’s creditworthiness is evaluated on a case-by-case basis, and the amount of collateral obtained, if any, is based on management’s credit evaluation of the customer. Collateral held varies but may include cash, real estate and improvements, marketable securities, accounts receivable, inventory, equipment, and personal property. The contractual amounts of these commitments are not reflected in the consolidated financial statements and would only be reflected if drawn upon. Since many of the commitments are expected to expire without being drawn upon, the contractual amounts do not necessarily represent future cash requirements. However, should the commitments be drawn upon and should our customers default on their resulting obligation to us, the Company’s maximum exposure to credit loss, without consideration of collateral, is represented by the contractual amount of those instruments. A summary of the Company’s total contractual amount for all off-balance sheet commitments at June 30, 2017 is as follows: Commitments to extend credit $ 598,519,000 Standby letters of credit $ 60,048,000 The Company originates residential mortgage loans, sells them to third-party purchasers, and does not retain the servicing rights. These loans are originated internally and are primarily to borrowers in the Company’s geographic market footprint. These sales are on a best efforts basis to investors that follow conventional government sponsored entities ("GSE") and the Department of Housing and Urban Development/U.S. Department of Veterans Affairs ("HUD/VA") guidelines. Generally, loans held for sale are underwritten by the Company, including HUD/VA loans. Each purchaser has specific guidelines and criteria for sellers of loans, and the risk of credit loss with regard to the principal amount of the loans sold is generally transferred to the purchasers upon sale. While the loans are sold without recourse, the purchase agreements require the Company to make certain representations and warranties regarding the existence and sufficiency of file documentation and the absence of fraud by borrowers or other third parties such as appraisers in connection with obtaining the loan. If it is determined that the loans sold were in breach of these representations or warranties or the loan had an early payoff or payment default, the Company has obligations to either repurchase the loan for the unpaid principal balance and related investor fees or make the purchaser whole for the economic benefits of the loan. To date, repurchase activity pursuant to the terms of these representations and warranties has been insignificant and has resulted in insignificant losses to the Company. Based on information currently available, management believes that it does not have significant exposure to contingent losses that may arise relating to the representations and warranties that it has made in connection with its mortgage loan sales. Various legal claims also arise from time to time in the normal course of business. In the opinion of management, the resolution of these claims outstanding at June 30, 2017 will not have a material impact on the Company’s financial statements.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements FASB ASC 820, Fair Value Measurements and Disclosures , which defines fair value, establishes a framework for measuring fair value in U.S. GAAP and expands disclosures about fair value measurements. The definition of fair value focuses on the exit price, i.e., the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, not the entry price (i.e., the price that would be paid to acquire the asset or received to assume the liability at the measurement date). The statement emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, the fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. Valuation Hierarchy FASB ASC 820 establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows: • Level 1 — inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2 — inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 — inputs to the valuation methodology are unobservable and significant to the fair value measurement. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Following is a description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy. Assets Securities available-for-sale — Where quoted prices are available for identical securities in an active market, securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include highly liquid government securities and certain other financial products. If quoted market prices are not available, then fair values are estimated by using pricing models that use observable inputs or quoted prices of securities with similar characteristics and are classified within Level 2 of the valuation hierarchy. In certain cases where there is limited activity or less transparency around inputs to the valuation and more complex pricing models or discounted cash flows are used, securities are classified within Level 3 of the valuation hierarchy. Impaired loans — A loan is considered to be impaired when it is probable the Company will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan agreement. Impaired loans are measured based on the present value of expected payments using the loan’s original effective rate as the discount rate, the loan’s observable market price, or the fair value of the collateral less selling costs if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a valuation allowance may be established as a component of the allowance for loan losses or the expense is recognized as a charge-off. Impaired loans are classified within Level 3 of the valuation hierarchy due to the unobservable inputs used in determining their fair value such as collateral values and the borrower’s underlying financial condition. Other real estate owned — Other real estate owned (“OREO”) represents real estate foreclosed upon by the Company through loan defaults by customers or acquired in lieu of foreclosure. Substantially all of these amounts relate to construction and land development, other loans secured by land, and commercial real estate loans for which the Company believes it has adequate collateral. Upon foreclosure, the property is recorded at the lower of cost or fair value, based on appraised value, less selling costs estimated as of the date acquired with any loss recognized as a charge-off through the allowance for loan losses. Additional OREO losses for subsequent valuation downward adjustments are determined on a specific property basis and are included as a component of noninterest expense along with holding costs. Any gains or losses realized at the time of disposal are also reflected in noninterest expense, as applicable. OREO is included in Level 3 of the valuation hierarchy due to the lack of observable market inputs into the determination of fair value. Appraisal values are property-specific and sensitive to the changes in the overall economic environment. Mortgage loans held-for-sale — Mortgage loans held-for-sale are carried at the fair value. The fair value of mortgage loans held-for-sale is determined using quoted prices for similar assets, adjusted for specific attributes of that loan (Level 2). Other assets — Included in other assets are certain assets carried at fair value, including the cash surrender value of bank owned life insurance policies. The Company uses financial information received from insurance carriers indicating the performance of the insurance policies and cash surrender values in determining the carrying value. The Company reflects these assets within Level 3 of the valuation hierarchy due to the unobservable inputs included in the valuation of these items. The Company does not consider the fair values of these policies and contracts to be materially sensitive to changes in these unobservable inputs. The following tables present the financial instruments carried at fair value as of June 30, 2017 and December 31, 2016 , by caption on the consolidated balance sheet and by FASB ASC 820 valuation hierarchy (as described above) (in thousands): Assets and Liabilities Measured at Fair Value on a Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) June 30, 2017 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 62,682 — 62,682 — Mortgage-backed securities 158,889 — 158,889 — Asset-backed securities 29,952 — 29,952 — State and municipal securities 45,258 — 45,258 — Total investment securities available-for-sale 296,781 — 296,781 — Loans held for sale 7,233 — 7,233 — Other assets 29,057 — — 29,057 Total assets at fair value $ 333,071 — 304,014 29,057 December 31, 2016 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 59,488 — 59,488 — Mortgage-backed securities 164,365 — 164,365 — Asset-backed securities 36,857 — 36,857 — State and municipal securities 51,875 — 51,875 — Total investment securities available-for-sale 312,585 — 312,585 — Loans held for sale 14,788 — 14,788 — Other assets 28,616 — — 28,616 Total assets at fair value $ 355,989 — 327,373 28,616 Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) June 30, 2017 Other real estate owned $ 1,883 — — 1,883 Impaired loans, net (¹) 5,794 — — 5,794 Total $ 7,677 — — 7,677 December 31, 2016 Other real estate owned $ 4,527 — — 4,527 Impaired loans, net (¹) 6,792 — — 6,792 Total $ 11,319 — — 11,319 (1) Amount is net of a valuation allowance of $434,000 at June 30, 2017 and $316,000 at December 31, 2016 as required by ASC 310, “Receivables.” In the case of the bond portfolio, the Company monitors the valuation technique utilized by various pricing agencies to ascertain when transfers between levels have been affected. The nature of the remaining assets and liabilities is such that transfers in and out of any level are expected to be rare. For the six months ended June 30, 2017 , there were no transfers between Levels 1, 2 or 3. The table below includes a rollforward of the balance sheet amounts for the six months ended June 30, 2017 and 2016 (including the change in fair value) for financial instruments classified by the Company within Level 3 of the valuation hierarchy for assets and liabilities measured at fair value on a recurring basis. When a determination is made to classify a financial instrument within Level 3 of the valuation hierarchy, the determination is based upon the significance of the unobservable factors to the overall fair value measurement. However, since Level 3 financial instruments typically include, in addition to the unobservable or Level 3 components, observable components (that is, components that are actively quoted and can be validated to external sources), the gains and losses in the table below include changes in fair value due in part to observable factors that are part of the valuation methodology (in thousands): For the Six Months Ended June 30, 2017 2016 Other Assets Other Liabilities Other Assets Other Liabilities Fair value, January 1 $ 28,616 — $ 26,672 — Total realized gains included in income 441 — 285 — Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at June 30 — — — — Purchases, issuances and settlements, net — — 1,916 — Transfers out of Level 3 — — — — Fair value, June 30 $ 29,057 — $ 28,873 — Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at June 30 $ 441 — $ 285 — The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments that are not measured at fair value. In cases where quoted market prices or observable components are not available, fair values are based on estimates using discounted cash flow models. Those models are significantly affected by the assumptions used, including the discount rates, estimates of future cash flows and borrower creditworthiness. The fair value estimates presented herein are based on pertinent information available to management as of June 30, 2017 and December 31, 2016 . Such amounts have not been revalued for purposes of these consolidated financial statements since those dates and, therefore, current estimates of fair value may differ significantly from the amounts presented herein. Held-to-maturity securities — Estimated fair values for investment securities are based on quoted market prices where available. If quoted market prices are not available, then fair values are estimated by using pricing models that use observable inputs or quoted prices of securities with similar characteristics. Loans — The fair value of our loan portfolio includes a credit risk factor in the determination of the fair value of our loans. This credit risk assumption is intended to approximate the fair value that a market participant would realize in a hypothetical orderly transaction. Our loan portfolio is initially fair valued using a segmented approach. We divide our loan portfolio into the following categories: variable rate loans, impaired loans and all other loans. The results are then adjusted to account for credit risk. For variable-rate loans that reprice frequently and have no significant change in credit risk, fair values approximate carrying values. Fair values for impaired loans are estimated using discounted cash flow models or based on the fair value of the underlying collateral. For other loans, fair values are estimated using discounted cash flow models, using current market interest rates offered for loans with similar terms to borrowers of similar credit quality. The values derived from the discounted cash flow approach for each of the above portfolios are then further discounted to incorporate credit risk to determine the exit price. Deposits and Securities sold under agreements to repurchase — Fair values for deposits are estimated using discounted cash flow models, using current market interest rates offered on deposits with similar remaining maturities. Off-Balance Sheet Instruments — The fair values of the Company’s off-balance-sheet financial instruments are based on fees charged to enter into similar agreements. However, commitments to extend credit do not represent a significant value to the Company until such commitments are funded. The following table presents the carrying amounts, estimated fair value and placement in the fair valuation hierarchy of the Company’s financial instruments at June 30, 2017 and December 31, 2016 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. Carrying/ Notional Estimated Quoted Market Prices in an Active Market Models with Significant Observable Market Parameters Models with Significant Unobservable Market Parameters (in Thousands) Amount Fair Value (¹) (Level 1) (Level 2) (Level 3) June 30, 2017 Financial assets: Securities held-to-maturity $ 33,752 33,594 — 33,594 — Loans, net 1,711,691 1,703,954 — — 1,703,954 Financial liabilities: Deposits and securities sold under agreements to repurchase 2,030,503 1,824,334 — — 1,824,334 Off-balance sheet instruments: Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2016 Financial assets: Securities held-to-maturity $ 36,624 36,145 — 36,145 — Loans, net 1,667,088 1,673,568 — — 1,673,568 Financial liabilities: Deposits and securities sold under agreements to repurchase 1,942,871 1,631,032 — — 1,631,032 Off-balance sheet instruments: Commitments to extend credit — — — — — Standby letters of credit — — — — — (1) Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction.

Stock Option Plan, Equity Incen

Stock Option Plan, Equity Incentive Plan & Charter Amendment	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Plan, Equity Incentive Plan & Charter Amendment	Stock Option Plan, Equity Incentive Plan & Charter Amendment In April 1999, the shareholders of the Company approved the Wilson Bank Holding Company 1999 Stock Option Plan (the “1999 Stock Option Plan”). The Stock Option Plan provided for the granting of stock options, and authorized the issuance of common stock upon the exercise of such options, for up to 200,000 shares of common stock, to officers and other key employees of the Company and its subsidiary. Furthermore, prior to the expiration of the 1999 Stock Option Plan, the Company and its subsidiary could reserve additional shares for issuance under the 1999 Stock Option Plan as needed in order that the aggregate number of shares that could have been issued during the term of the 1999 Stock Option Plan was equal to five percent ( 5% ) of the shares of common stock then issued and outstanding. In April 2009, the Company’s shareholders approved the Wilson Bank Holding Company 2009 Stock Option Plan (the “2009 Stock Option Plan”). The 2009 Stock Option Plan was effective as of April 14, 2009 and replaced the 1999 Stock Option Plan which expired on April 13, 2009. Under the 2009 Stock Option Plan, awards may be in the form of options to acquire common stock of the Company. Subject to adjustment as provided by the terms of the 2009 Stock Option Plan, the maximum number of shares of common stock with respect to which awards may be granted under the 2009 Stock Option Plan is 100,000 shares. As of June 30, 2017, the Company has available to grant 49,400 options to employees pursuant to the 2009 Stock Option Plan. Under the 2009 Stock Option Plan, stock option awards may be granted in the form of incentive stock options or nonstatutory stock options and are generally exercisable for up to 10 years following the date such option awards are granted. Exercise prices of incentive stock options must be equal to or greater than 100% of the fair market value of the common stock on the grant date. During the second quarter of 2016, the Company’s shareholders approved the Wilson Bank Holding Company 2016 Equity Incentive Plan, which authorizes awards of up to 750,000 shares of common stock. The 2016 Equity Incentive Plan was approved by the Board of Directors and effective as of January 25, 2016 and approved by the Company's shareholders on April 12, 2016. The Board of Directors approved an amendment and restatement of the 2016 Equity Incentive Plan (as amended and restated the "2016 Equity Incentive Plan") to make clear that directors who are not also employees of the Company may be awarded stock appreciation rights. The primary purpose of the 2016 Equity Incentive Plan is to promote the interests of the Company and its shareholders by, among other things, (i) attracting and retaining key officers, employees and directors of, and consultants to, the Company and its subsidiaries and affiliates, (ii) motivating those individuals by means of performance-related incentives to achieve long-range performance goals, (iii) enabling such individuals to participate in the long-term growth and financial success of the Company, (iv) encouraging ownership of stock in the Company by such individuals, and (v) linking their compensation to the long-term interests of the Company and its shareholders. Except for certain limitations, awards can be in the form of stock options (both incentive stock options and non-qualified stock options), stock appreciation rights, restricted shares and restricted share units, performance awards and other stock-based awards. As of June 30, 2017, the Company has 499,170 shares remaining available for issuance under the 2016 Equity Incentive Plan. As of June 30, 2017, the Company had granted 122,790 non-qualified stock options with a weighed average price of $40.64 and 128,040 cash-settled stock appreciation rights each with a weighted average price of $40.53 . The following tables summarize information about stock options and cash-settled SARs for the six months ended June 30, 2017: June 30, 2017 Shares Weighted Options and SARs outstanding at beginning of year 183,847 $ 38.08 Granted 110,833 40.85 Exercised 3,736 28.29 Forfeited or expired 322 24.13 Outstanding at end of year 290,622 $ 39.28 Options and SARs exercisable at June 30, 2017 15,265 $ 29.67 Shares Weighted Average Grant Date Fair Value Non-vested options and SARs at January 1, 2017 170,294 $ 10.63 Granted 110,833 11.94 Vested (5,448 ) 6.18 Forfeited or expired (322 ) 1.61 Non-vested options and SARs at June 30, 2017 275,357 $ 11.77

Summary of Significant Accoun17

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Nature of Business	Nature of Business — Wilson Bank Holding Company (the “Company”) is a bank holding company whose primary business is conducted by its wholly-owned subsidiary, Wilson Bank & Trust (the “Bank”). The Bank is a commercial bank headquartered in Lebanon, Tennessee. The Bank provides a full range of banking services in its primary market areas of Wilson, Davidson, Rutherford, Trousdale, Sumner, Dekalb, Putnam and Smith Counties, Tennessee.
Basis of Presentation	Basis of Presentation — The accompanying unaudited, consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated audited financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2016 . These consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary. Significant intercompany transactions and accounts are eliminated in consolidation.
Use of Estimates	Use of Estimates — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for loan losses, the valuation of deferred tax assets, determination of any impairment of intangibles, other-than-temporary impairment of securities, the valuation of other real estate, and the fair value of financial instruments. These financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . There have been no significant changes to the Company’s significant accounting policies as disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 .
Loans	Loans — Loans are reported at their outstanding principal balances less unearned income, the allowance for loan losses and any deferred fees or costs on originated loans. Interest income on loans is accrued based on the principal balance outstanding. Loan origination fees, net of certain loan origination costs, are deferred and recognized as an adjustment to the related loan yield using a method which approximates the interest method. Loans are charged off when management believes that the full collectability of the loan is unlikely. As such, a loan may be partially charged-off after a “confirming event” has occurred which serves to validate that full repayment pursuant to the terms of the loan is unlikely. Loans are placed on nonaccrual status when there is a significant deterioration in the financial condition of the borrower, which often is determined when the principal or interest on the loan is more than 90 days past due, unless the loan is both well-secured and in the process of collection. Generally, all interest accrued but not collected for loans that are placed on nonaccrual status, is reversed against current income. Interest income is subsequently recognized only to the extent cash payments are received while the loan is classified as nonaccrual, but interest income recognition is reviewed on a case-by-case basis. A nonaccrual loan is returned to accruing status once the loan has been brought current and collection is reasonably assured or the loan has been “well-secured” through other techniques. Past due status is determined based on the contractual due date per the underlying loan agreement. All loans that are placed on nonaccrual are further analyzed to determine if they should be classified as impaired loans. At December 31, 2016 and at June 30, 2017 , there were no loans classified as nonaccrual that were not also deemed to be impaired except for those loans not individually evaluated for impairment as described below. A loan is considered to be impaired when it is probable the Company will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan. This determination is made using a variety of techniques, which include a review of the borrower’s financial condition, debt-service coverage ratios, global cash flow analysis, guarantor support, other loan file information, meetings with borrowers, inspection or reappraisal of collateral and/or consultation with legal counsel as well as results of reviews of other similar industry credits (e.g. builder loans, development loans, church loans, etc). Loans with an identified weakness and principal balance of $500,000 or more are subject to individual identification for impairment. Individually identified impaired loans are measured based on the present value of expected payments using the loan’s original effective rate as the discount rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a specific valuation allowance is established as a component of the allowance for loan losses or, in the case of collateral dependent loans, the excess may be charged off. Changes to the valuation allowance are recorded as a component of the provision for loan losses. Any subsequent adjustments to present value calculations for impaired loan valuations as a result of the passage of time, such as changes in the anticipated payback period for repayment, are recorded as a component of the provision for loan losses. For loans less than $500,000 , the Company assigns a valuation allowance to these loans utilizing an allocation rate equal to the allocation rate calculated for non-impaired loans of a similar type.
Allowance for Loan Losses	Allowance for Loan Losses — The allowance for loan losses is maintained at a level that management believes to be adequate to absorb probable losses in the loan portfolio. Loan losses are charged against the allowance when they are known. Subsequent recoveries are credited to the allowance. Management’s determination of the adequacy of the allowance is based on an evaluation of the portfolio, current economic conditions, volume, growth, composition of the loan portfolio, homogeneous pools of loans, risk ratings of specific loans, historical loan loss factors, loss experience of various loan segments, identified impaired loans and other factors related to the portfolio. This evaluation is performed quarterly and is inherently subjective, as it requires material estimates that are susceptible to significant change including the amounts and timing of future cash flows expected to be received on any impaired loans. In assessing the adequacy of the allowance, we also consider the results of our ongoing independent loan review process. We undertake this process both to ascertain whether there are loans in the portfolio whose credit quality has weakened over time and to assist in our overall evaluation of the risk characteristics of the entire loan portfolio. Our loan review process includes the judgment of management, independent loan reviewers, and reviews that may have been conducted by third-party reviewers. We incorporate relevant loan review results in the loan impairment determination. In addition, regulatory agencies, as an integral part of their examination process, will periodically review the Company’s allowance for loan losses, and may require the Company to record adjustments to the allowance based on their judgment about information available to them at the time of their examinations.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 was originally going to be effective for us on January 1, 2017; however, ASU 2015-14, “Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date" deferred the effective date of ASU 2014-09 by one year to January 1, 2018. Based on our analysis of the potential impact of ASU 2014-09, we do not expect this update to have a material impact on the Company’s consolidated financial statements. In January 2016, the FASB issued ASU 2016-1, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-1, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (viii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. ASU 2016-1 will be effective for us on January 1, 2018 and is not expected to have a significant impact on our financial statements. In February 2016, FASB issued ASU 2016-02, "Leases (Topic 842)." The amendments in this ASU are effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. As a result of the amendment, lessees will need to recognize a right-of-use asset and a lease liability for virtually all of their leases (other than leases that meet the definition of a short-term lease). The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustments, such as adjustments for initial direct costs. For income statement purposes, FASB retained a dual model, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. We currently do not expect this ASU to have a material impact on our consolidated financial statements. In March 2016, FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." The amendments in this ASU simplify several aspects of the accounting for share-based payment award transactions, including: (1) income tax consequences; (2) classification of awards as either equity or liabilities, and (3) classification on the statement of cash flows. For public companies, like the Company, the amendments in this ASU are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. We elected to adopt the provisions of ASU 2016-09 during the first quarter of 2016 in advance of the required application date of January 1, 2017. The adoption of ASU 2016-09 did not have a material impact on our consolidated statements of earnings for the six months ended June 30, 2017 and 2016. In June 2016, FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective on January 1, 2020. We are currently evaluating the potential impact of ASU 2016-13 on our financial statements. We are also evaluating the sufficiency of current systems and data needed to comply with this ASU. In August 2016, FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 clarifies how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230. The update addresses eight specific cash flow issues including, but not limited to, proceeds from the settlement of bank-owned life insurance policies, with the objective of reducing the existing diversity in practice. ASU 2016-15 will be effective on January 1, 2018. We are currently evaluating the potential impact of ASU 2016-15 on our financial statements. In March 2017, FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 provides guidance on the amortization period for certain purchased callable debt securities held at a premium. This update shortens the amortization period for the premium to the earliest call date. Under current generally accepted accounting principles, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument related to certain cash flow issues in order to reduce the current and potential future diversity in practice. ASU 2017-08 will be effective for us on January 1, 2019. We are currently evaluating the potential impact of ASU 2017-08 on our financial statements. Other than those previously discussed, there were no other recently issued accounting pronouncements that may materially impact the Company.
Income Taxes	Accounting Standards Codification (“ASC”) 740, Income Taxes , defines the threshold for recognizing the benefits of tax return positions in the financial statements as “more-likely-than-not” to be sustained by the taxing authority. This section also provides guidance on the derecognition, measurement and classification of income tax uncertainties, along with any related interest and penalties, and includes guidance concerning accounting for income tax uncertainties in interim periods. As of June 30, 2017 , the Company had no unrecognized tax benefits related to Federal or state income tax matters and does not anticipate any material increase or decrease in unrecognized tax benefits relative to any tax positions taken prior to June 30, 2017 .
Fair Value Measurements and Disclosures	FASB ASC 820, Fair Value Measurements and Disclosures , which defines fair value, establishes a framework for measuring fair value in U.S. GAAP and expands disclosures about fair value measurements. The definition of fair value focuses on the exit price, i.e., the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, not the entry price (i.e., the price that would be paid to acquire the asset or received to assume the liability at the measurement date). The statement emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, the fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability.

Loans and Allowance for Loan 18

Loans and Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Schedule of Details on Loans of Company	The following schedule details the loans of the Company at June 30, 2017 and December 31, 2016 : (In Thousands) June 30, December 31, Mortgage loans on real estate Residential 1-4 family $ 410,312 $ 393,268 Multifamily 108,994 109,410 Commercial 663,102 689,695 Construction and land development 352,725 297,315 Farmland 42,136 46,314 Second mortgages 8,440 9,193 Equity lines of credit 57,988 56,038 Total mortgage loans on real estate 1,643,697 1,601,233 Commercial loans 49,257 40,301 Agricultural loans 1,442 1,562 Consumer installment loans Personal 35,247 41,117 Credit cards 3,205 3,157 Total consumer installment loans 38,452 44,274 Other loans 9,690 9,055 Total loans before net deferred loan fees 1,742,538 1,696,425 Net deferred loan fees (7,524 ) (6,606 ) Total loans 1,735,014 1,689,819 Less: Allowance for loan losses (23,323 ) (22,731 ) Net loans $ 1,711,691 $ 1,667,088
Transactions in Allowance for Loan Losses	Transactions in the allowance for loan losses for the six months ended June 30, 2017 and year ended December 31, 2016 are summarized as follows: (In Thousands) Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total June 30, 2017 Allowance for loan losses: Beginning balance $ 4,571 839 9,541 5,387 658 112 675 386 562 22,731 Provision 618 306 (76 ) (277 ) (63 ) (7 ) 9 41 258 809 Charge-offs (112 ) — — — (3 ) (11 ) — — (468 ) (594 ) Recoveries 17 — 89 39 — 3 1 2 226 377 Ending balance $ 5,094 1,145 9,554 5,149 592 97 685 429 578 23,323 Ending balance individually evaluated for impairment $ 134 — 300 — — — — — — 434 Ending balance collectively evaluated for impairment $ 4,960 1,145 9,254 5,149 592 97 685 429 578 22,889 Loans: Ending balance $ 410,312 108,994 663,102 352,725 42,136 8,440 57,988 49,257 49,584 1,742,538 Ending balance individually evaluated for impairment $ 735 — 4,043 1,438 — — — — — 6,216 Ending balance collectively evaluated for impairment $ 409,577 108,994 659,059 351,287 42,136 8,440 57,988 49,257 49,584 1,736,322 Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total December 31, 2016 Allowance for loan losses: Beginning balance $ 5,024 619 9,986 5,136 654 106 594 301 480 22,900 Provision (400 ) 220 (399 ) 283 2 2 66 81 524 379 Charge-offs (109 ) — (100 ) (66 ) — — — (11 ) (674 ) (960 ) Recoveries 56 — 54 34 2 4 15 15 232 412 Ending balance $ 4,571 839 9,541 5,387 658 112 675 386 562 22,731 Ending balance individually evaluated for impairment $ 196 — 120 — — — — — — 316 Ending balance collectively evaluated for impairment $ 4,375 839 9,421 5,387 658 112 675 386 562 22,415 Loans: Ending balance $ 393,268 109,410 689,695 297,315 46,314 9,193 56,038 40,301 54,891 1,696,425 Ending balance individually evaluated for impairment $ 679 — 4,689 1,618 103 — — — — 7,089 Ending balance collectively evaluated for impairment $ 392,589 109,410 685,006 295,697 46,211 9,193 56,038 40,301 54,891 1,689,336
Company's Impaired Loans	The following table presents the Company’s impaired loans at June 30, 2017 and December 31, 2016 . In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized June 30, 2017 With no related allowance recorded: Residential 1-4 family $ 251 299 — 200 7 Multifamily — — — — — Commercial real estate 906 902 — 911 20 Construction 1,443 1,438 — 1,483 34 Farmland — — — 51 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 2,600 2,639 — 2,645 61 With allowance recorded: Residential 1-4 family $ 487 661 134 513 16 Multifamily — — — — — Commercial real estate 3,141 3,141 300 3,141 9 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 3,628 3,802 434 3,654 25 Total Residential 1-4 family $ 738 960 134 713 23 Multifamily — — — — — Commercial real estate 4,047 4,043 300 4,052 29 Construction 1,443 1,438 — 1,483 34 Farmland — — — 51 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 6,228 6,441 434 6,299 86 In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized December 31, 2016 With no related allowance recorded: Residential 1-4 family $ 150 148 — 150 7 Multifamily — — — — — Commercial real estate 4,248 4,246 — 4,352 38 Construction 1,623 1,618 — 1,778 82 Farmland 104 103 — 79 5 Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 6,125 6,115 — 6,359 132 With allowance recorded: Residential 1-4 family $ 540 531 196 540 32 Multifamily — — — — — Commercial real estate 443 443 120 111 5 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 983 974 316 651 37 Total: Residential 1-4 family $ 690 679 196 690 39 Multifamily — — — — — Commercial real estate 4,691 4,689 120 4,463 43 Construction 1,623 1,618 — 1,778 82 Farmland 104 103 — 79 5 Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 7,108 7,089 316 7,010 169
Summary of Carrying Balances of TDR's	The following table summarizes the carrying balances of TDRs at June 30, 2017 and December 31, 2016 . June 30, 2017 December 31, 2016 (In thousands) Performing TDRs $ 3,485 $ 3,277 Nonperforming TDRs 1,026 1,319 Total TDRS $ 4,511 $ 4,596
Troubled Debt Restructuring Categorized by Loan	The following table outlines the amount of each troubled debt restructuring categorized by loan classification for the six months ended June 30, 2017 and the year ended December 31, 2016 (in thousands, except for number of contracts): June 30, 2017 December 31, 2016 Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Residential 1-4 family 4 $ 311 $ 311 4 $ 130 $ 130 Multifamily — — — — — — Commercial real estate — — — 2 1,364 1,244 Construction — — — — — — Farmland 1 86 86 1 103 103 Second mortgages — — — — — — Equity lines of credit — — — — — — Commercial — — — — — — Agricultural, installment and other 1 3 3 2 17 17 Total 6 $ 400 $ 400 9 $ 1,614 $ 1,494
Summary of Loan Portfolio by Risk Rating	The following table is a summary of the Bank’s loan portfolio by risk rating at June 30, 2017 and December 31, 2016 : (In Thousands) Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, installment and other Total June 30, 2017 Credit Risk Profile by Internally Assigned Rating Pass $ 401,120 108,994 658,135 352,426 41,299 7,994 57,772 49,254 49,366 1,726,360 Special Mention 5,886 — 839 86 151 295 64 3 101 7,425 Substandard 3,306 — 4,128 213 686 151 152 — 117 8,753 Doubtful — — — — — — — — — — Total $ 410,312 108,994 663,102 352,725 42,136 8,440 57,988 49,257 49,584 1,742,538 December 31, 2016 Credit Risk Profile by Internally Assigned Rating Pass $ 384,383 109,410 684,202 297,089 45,470 8,775 55,883 40,301 54,754 1,680,267 Special Mention 5,616 — 668 121 147 303 — — 26 6,881 Substandard 3,269 — 4,825 105 697 115 155 — 111 9,277 Doubtful — — — — — — — — — — Total $ 393,268 109,410 689,695 297,315 46,314 9,193 56,038 40,301 54,891 1,696,425

Debt and Equity Securities (Tab

Debt and Equity Securities (Tables)	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Debt and Equity Securities	Debt and equity securities have been classified in the consolidated balance sheet according to management’s intent. Debt and equity securities at June 30, 2017 and December 31, 2016 are summarized as follows: June 30, 2017 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs)* $ 64,147 $ 11 $ 1,476 $ 62,682 Mortgage-backed: GSE residential 159,569 738 1,418 158,889 Asset-backed: SBAP 30,345 28 421 29,952 Obligations of states and political subdivisions 45,839 185 766 45,258 $ 299,900 $ 962 $ 4,081 $ 296,781 June 30, 2017 Securities Held-to-Maturity In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Mortgage-backed: Government-sponsored enterprises (GSEs)* residential $ 11,073 $ 51 $ 121 $ 11,003 Obligations of states and political subdivisions 22,679 161 249 22,591 $ 33,752 $ 212 $ 370 $ 33,594 * Such as Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, Federal Home Loan Bank, Federal Farm Credit Bank, and Government National Mortgage Association. December 31, 2016 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs)* $ 61,879 $ — $ 2,391 $ 59,488 Mortgage-backed: GSE residential 166,316 496 2,447 164,365 Asset-backed: SBAP 37,577 9 729 36,857 Obligations of states and political subdivisions 53,429 52 1,606 51,875 $ 319,201 $ 557 $ 7,173 $ 312,585 December 31, 2016 Securities Held-To-Maturity In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Mortgage-backed: Government-sponsored enterprises (GSEs)* residential $ 11,856 $ 48 $ 230 $ 11,674 Obligations of states and political subdivisions 24,768 142 439 24,471 $ 36,624 $ 190 $ 669 $ 36,145 * Such as Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, Federal Home Loan Bank, Federal Farm Credit Bank, and Government National Mortgage Association.
Maturity of Amortized Cost and Estimated Market Value of Debt Securities	The amortized cost and estimated market value of debt securities at June 30, 2017 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Held-to-Maturity Available-For-Sale In Thousands Amortized Cost Estimated Market Value Amortized Cost Estimated Market Value Due in one year or less $ 3,305 $ 3,311 $ 100 $ 100 Due after one year through five years 7,558 7,632 25,152 24,969 Due after five years through ten years 9,871 9,741 120,594 119,192 Due after ten years 13,018 12,910 154,054 152,520 $ 33,752 $ 33,594 $ 299,900 $ 296,781
Gross Unrealized Losses and Fair Value of Company's Investments	The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2017 and December 31, 2016 . In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total June 30, 2017 Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Held-to-Maturity Securities: Mortgage-backed: Government-sponsored enterprises (GSEs) residential $ 5,367 $ 30 5 $ 3,154 $ 91 2 $ 8,521 $ 121 Obligations of states and political subdivisions 10,186 249 25 — — — 10,186 249 $ 15,553 $ 279 30 $ 3,154 $ 91 2 $ 18,707 $ 370 Available-for-Sale Securities: GSEs $ 58,822 $ 1,426 23 $ 2,700 $ 50 1 $ 61,522 $ 1,476 Mortgage-backed: GSE residential 93,394 1,282 52 7,484 136 9 100,878 1,418 Asset-backed: SBAP 24,249 421 13 — — — 24,249 421 Obligations of states and political subdivisions 26,266 720 69 2,142 46 3 28,408 766 $ 202,731 $ 3,849 157 $ 12,326 $ 232 13 $ 215,057 $ 4,081 In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total Fair Unrealized Number of Securities Fair Unrealized Number of Securities Fair Unrealized December 31, 2016 Value Losses Included Value Losses Included Value Losses Held-to-Maturity Securities: Mortgage-backed: Government-sponsored enterprises (GSEs) residential $ 8,177 $ 151 7 $ 1,704 $ 79 1 $ 9,881 $ 230 Obligations of states and political subdivisions 16,081 439 41 — — — 16,081 439 $ 24,258 $ 590 48 $ 1,704 $ 79 1 $ 25,962 $ 669 Available-for-Sale Securities: GSEs $ 59,488 $ 2,391 23 $ — $ — — $ 59,488 $ 2,391 Mortgage-backed: GSE residential 124,011 2,350 64 6,918 97 9 130,929 2,447 Asset-backed: SBAP 33,579 729 17 — — — 33,579 729 Obligations of states and political subdivisions 42,801 1,606 116 — — — 42,801 1,606 $ 259,879 $ 7,076 220 $ 6,918 $ 97 9 $ 266,797 $ 7,173

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Summary of Components Comprising Basic and Diluted Earnings Per Share	The following is a summary of components comprising basic and diluted earnings per share (“EPS”) for the three and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (Dollars in Thousands Except Share and Per Share Amounts) (Dollars in Thousands Except Share and Per Share Amounts) Basic EPS Computation*: Numerator – Earnings available to common stockholders $ 6,988 $ 6,270 $ 13,483 $ 11,913 Denominator – Weighted average number of common shares outstanding 10,381,860 10,257,536 10,371,377 10,248,742 Basic earnings per common share $ 0.67 $ 0.61 $ 1.30 $ 1.16 Diluted EPS Computation*: Numerator – Earnings available to common stockholders $ 6,988 $ 6,270 $ 13,483 $ 11,913 Denominator – Weighted average number of common shares outstanding 10,381,860 10,257,536 10,371,377 10,248,742 Dilutive effect of stock options 5,216 4,780 5,031 4,854 Weighted average diluted common shares outstanding 10,387,076 10,262,316 10,376,408 10,253,596 Diluted earnings per common share $ 0.67 $ 0.61 $ 1.30 $ 1.16 * Adjusted for 4 for 3 stock split effective on March 30, 2016.

Commitments and Contingent Li21

Commitments and Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Total Contractual Amount for All Off-Balance Sheet Commitments	A summary of the Company’s total contractual amount for all off-balance sheet commitments at June 30, 2017 is as follows: Commitments to extend credit $ 598,519,000 Standby letters of credit $ 60,048,000

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following tables present the financial instruments carried at fair value as of June 30, 2017 and December 31, 2016 , by caption on the consolidated balance sheet and by FASB ASC 820 valuation hierarchy (as described above) (in thousands): Assets and Liabilities Measured at Fair Value on a Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) June 30, 2017 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 62,682 — 62,682 — Mortgage-backed securities 158,889 — 158,889 — Asset-backed securities 29,952 — 29,952 — State and municipal securities 45,258 — 45,258 — Total investment securities available-for-sale 296,781 — 296,781 — Loans held for sale 7,233 — 7,233 — Other assets 29,057 — — 29,057 Total assets at fair value $ 333,071 — 304,014 29,057 December 31, 2016 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 59,488 — 59,488 — Mortgage-backed securities 164,365 — 164,365 — Asset-backed securities 36,857 — 36,857 — State and municipal securities 51,875 — 51,875 — Total investment securities available-for-sale 312,585 — 312,585 — Loans held for sale 14,788 — 14,788 — Other assets 28,616 — — 28,616 Total assets at fair value $ 355,989 — 327,373 28,616
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis	Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) June 30, 2017 Other real estate owned $ 1,883 — — 1,883 Impaired loans, net (¹) 5,794 — — 5,794 Total $ 7,677 — — 7,677 December 31, 2016 Other real estate owned $ 4,527 — — 4,527 Impaired loans, net (¹) 6,792 — — 6,792 Total $ 11,319 — — 11,319 (1) Amount is net of a valuation allowance of $434,000 at June 30, 2017 and $316,000 at December 31, 2016 as required by ASC 310, “Receivables.”
Changes in Fair Value Due to Observable Factors	The table below includes a rollforward of the balance sheet amounts for the six months ended June 30, 2017 and 2016 (including the change in fair value) for financial instruments classified by the Company within Level 3 of the valuation hierarchy for assets and liabilities measured at fair value on a recurring basis. When a determination is made to classify a financial instrument within Level 3 of the valuation hierarchy, the determination is based upon the significance of the unobservable factors to the overall fair value measurement. However, since Level 3 financial instruments typically include, in addition to the unobservable or Level 3 components, observable components (that is, components that are actively quoted and can be validated to external sources), the gains and losses in the table below include changes in fair value due in part to observable factors that are part of the valuation methodology (in thousands): For the Six Months Ended June 30, 2017 2016 Other Assets Other Liabilities Other Assets Other Liabilities Fair value, January 1 $ 28,616 — $ 26,672 — Total realized gains included in income 441 — 285 — Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at June 30 — — — — Purchases, issuances and settlements, net — — 1,916 — Transfers out of Level 3 — — — — Fair value, June 30 $ 29,057 — $ 28,873 — Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at June 30 $ 441 — $ 285 —
Carrying Value and Estimated Fair Value of Financial Instruments	The following table presents the carrying amounts, estimated fair value and placement in the fair valuation hierarchy of the Company’s financial instruments at June 30, 2017 and December 31, 2016 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. Carrying/ Notional Estimated Quoted Market Prices in an Active Market Models with Significant Observable Market Parameters Models with Significant Unobservable Market Parameters (in Thousands) Amount Fair Value (¹) (Level 1) (Level 2) (Level 3) June 30, 2017 Financial assets: Securities held-to-maturity $ 33,752 33,594 — 33,594 — Loans, net 1,711,691 1,703,954 — — 1,703,954 Financial liabilities: Deposits and securities sold under agreements to repurchase 2,030,503 1,824,334 — — 1,824,334 Off-balance sheet instruments: Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2016 Financial assets: Securities held-to-maturity $ 36,624 36,145 — 36,145 — Loans, net 1,667,088 1,673,568 — — 1,673,568 Financial liabilities: Deposits and securities sold under agreements to repurchase 1,942,871 1,631,032 — — 1,631,032 Off-balance sheet instruments: Commitments to extend credit — — — — — Standby letters of credit — — — — — (1) Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction.

Stock Option Plan, Equity Inc23

Stock Option Plan, Equity Incentive Plan & Charter Amendment (Tables)	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity	The following tables summarize information about stock options and cash-settled SARs for the six months ended June 30, 2017: June 30, 2017 Shares Weighted Options and SARs outstanding at beginning of year 183,847 $ 38.08 Granted 110,833 40.85 Exercised 3,736 28.29 Forfeited or expired 322 24.13 Outstanding at end of year 290,622 $ 39.28 Options and SARs exercisable at June 30, 2017 15,265 $ 29.67
Schedule of Nonvested Share Activity	Shares Weighted Average Grant Date Fair Value Non-vested options and SARs at January 1, 2017 170,294 $ 10.63 Granted 110,833 11.94 Vested (5,448 ) 6.18 Forfeited or expired (322 ) 1.61 Non-vested options and SARs at June 30, 2017 275,357 $ 11.77

Summary of Significant Accoun24

Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017USD ($)
Accounting Policies [Abstract]
Minimum past due of loans for nonaccrual status	90 days
Loans with identified weakness and principal balance	$ 500,000
Assignment of valuation allowance for specified amount of loan (less than)	$ 500,000

Loans and Allowance for Loan 25

Loans and Allowance for Loan Losses - Schedule of Details on Loans of Company (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 1,742,538	$ 1,696,425
Net deferred loan fees	(7,524)	(6,606)
Total loans	1,735,014	1,689,819
Less: Allowance for loan losses	(23,323)	(22,731)	$ (22,900)
Net loans	1,711,691	1,667,088
Agricultural [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,442	1,562
Residential 1-4 Family [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	410,312	393,268
Multifamily [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	108,994	109,410
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	663,102	689,695
Farmland [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	42,136	46,314
Construction and land development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	352,725	297,315
Second mortgages [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	8,440	9,193
Less: Allowance for loan losses	(97)	(112)	$ (106)
Equity lines of credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	57,988	56,038
Mortgage loans on real estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,643,697	1,601,233
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	49,257	40,301
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	38,452	44,274
Consumer [Member] | Personal [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	35,247	41,117
Consumer [Member] | Credit Cards [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	3,205	3,157
Other [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 9,690	$ 9,055

Loans and Allowance for Loan 26

Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017USD ($)loan	Dec. 31, 2016USD ($)loan
Financing Receivable, Recorded Investment [Line Items]
Threshold percentage of repayment derived from non-affiliated third party (as a percent)	50.00%
Impaired loans, net	$ 2,700	$ 3,000
Troubled debt restructuring number of loans | loan	0	0
Consumer mortgage loans	$ 308	$ 389
Residential 1-4 Family [Member] | Mortgage loans on real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortization period, lower range	15 years
Amortization period, upper range	30 years
Maturity period, lower range	5 years
Maturity period, upper range	15 years
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Potential problem loans	$ 16,200	$ 16,200

Loans and Allowance for Loan 27

Loans and Allowance for Loan Losses - Transactions in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Allowance for loan losses:
Beginning balance	$ 22,731	$ 22,900
Provision	809	379
Charge-offs	(594)	(960)
Recoveries	377	412
Ending balance	23,323	22,731
Ending balance individually evaluated for impairment	434	316
Ending balance collectively evaluated for impairment	22,889	22,415
Loans:
Ending balance	1,742,538	1,696,425
Ending balance individually evaluated for impairment	6,216	7,089
Ending balance collectively evaluated for impairment	1,736,322	1,689,336
Residential 1-4 Family [Member]
Allowance for loan losses:
Beginning balance	4,571	5,024
Provision	618	(400)
Charge-offs	(112)	(109)
Recoveries	17	56
Ending balance	5,094	4,571
Ending balance individually evaluated for impairment	134	196
Ending balance collectively evaluated for impairment	4,960	4,375
Loans:
Ending balance	410,312	393,268
Ending balance individually evaluated for impairment	735	679
Ending balance collectively evaluated for impairment	409,577	392,589
Multifamily [Member]
Allowance for loan losses:
Beginning balance	839	619
Provision	306	220
Charge-offs	0	0
Recoveries	0	0
Ending balance	1,145	839
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	1,145	839
Loans:
Ending balance	108,994	109,410
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	108,994	109,410
Commercial Real Estate [Member]
Allowance for loan losses:
Beginning balance	9,541	9,986
Provision	(76)	(399)
Charge-offs	0	(100)
Recoveries	89	54
Ending balance	9,554	9,541
Ending balance individually evaluated for impairment	300	120
Ending balance collectively evaluated for impairment	9,254	9,421
Loans:
Ending balance	663,102	689,695
Ending balance individually evaluated for impairment	4,043	4,689
Ending balance collectively evaluated for impairment	659,059	685,006
Construction [Member]
Allowance for loan losses:
Beginning balance	5,387	5,136
Provision	(277)	283
Charge-offs	0	(66)
Recoveries	39	34
Ending balance	5,149	5,387
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	5,149	5,387
Loans:
Ending balance	352,725	297,315
Ending balance individually evaluated for impairment	1,438	1,618
Ending balance collectively evaluated for impairment	351,287	295,697
Farmland [Member]
Allowance for loan losses:
Beginning balance	658	654
Provision	(63)	2
Charge-offs	(3)	0
Recoveries	0	2
Ending balance	592	658
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	592	658
Loans:
Ending balance	42,136	46,314
Ending balance individually evaluated for impairment	0	103
Ending balance collectively evaluated for impairment	42,136	46,211
Second mortgages [Member]
Allowance for loan losses:
Beginning balance	112	106
Provision	(7)	2
Charge-offs	(11)	0
Recoveries	3	4
Ending balance	97	112
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	97	112
Loans:
Ending balance	8,440	9,193
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	8,440	9,193
Equity Lines of Credit [Member]
Allowance for loan losses:
Beginning balance	675	594
Provision	9	66
Charge-offs	0	0
Recoveries	1	15
Ending balance	685	675
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	685	675
Loans:
Ending balance	57,988	56,038
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	57,988	56,038
Commercial [Member]
Allowance for loan losses:
Beginning balance	386	301
Provision	41	81
Charge-offs	0	(11)
Recoveries	2	15
Ending balance	429	386
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	429	386
Loans:
Ending balance	49,257	40,301
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	49,257	40,301
Agricultural, Installment and Other [Member]
Allowance for loan losses:
Beginning balance	562	480
Provision	258	524
Charge-offs	(468)	(674)
Recoveries	226	232
Ending balance	578	562
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	578	562
Loans:
Ending balance	49,584	54,891
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	$ 49,584	$ 54,891

Loans and Allowance for Loan 28

Loans and Allowance for Loan Losses - Company's Impaired Loans (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 6,228	$ 7,108
Unpaid Principal Balance	6,441	7,089
Related Allowance	434	316
Average Recorded Investment	6,299	7,010
Interest Income Recognized	86	169
With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,600	6,125
Unpaid Principal Balance	2,639	6,115
Average Recorded Investment	2,645	6,359
Interest Income Recognized	61	132
With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,628	983
Unpaid Principal Balance	3,802	974
Related Allowance	434	316
Average Recorded Investment	3,654	651
Interest Income Recognized	25	37
Residential 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	738	690
Unpaid Principal Balance	960	679
Related Allowance	134	196
Average Recorded Investment	713	690
Interest Income Recognized	23	39
Residential 1-4 Family [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	251	150
Unpaid Principal Balance	299	148
Average Recorded Investment	200	150
Interest Income Recognized	7	7
Residential 1-4 Family [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	487	540
Unpaid Principal Balance	661	531
Related Allowance	134	196
Average Recorded Investment	513	540
Interest Income Recognized	16	32
Multifamily [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Multifamily [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Multifamily [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,047	4,691
Unpaid Principal Balance	4,043	4,689
Related Allowance	300	120
Average Recorded Investment	4,052	4,463
Interest Income Recognized	29	43
Commercial Real Estate [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	906	4,248
Unpaid Principal Balance	902	4,246
Average Recorded Investment	911	4,352
Interest Income Recognized	20	38
Commercial Real Estate [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,141	443
Unpaid Principal Balance	3,141	443
Related Allowance	300	120
Average Recorded Investment	3,141	111
Interest Income Recognized	9	5
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,443	1,623
Unpaid Principal Balance	1,438	1,618
Related Allowance	0	0
Average Recorded Investment	1,483	1,778
Interest Income Recognized	34	82
Construction [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,443	1,623
Unpaid Principal Balance	1,438	1,618
Average Recorded Investment	1,483	1,778
Interest Income Recognized	34	82
Construction [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	104
Unpaid Principal Balance	0	103
Related Allowance	0	0
Average Recorded Investment	51	79
Interest Income Recognized	0	5
Farmland [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	104
Unpaid Principal Balance	0	103
Average Recorded Investment	51	79
Interest Income Recognized	0	5
Farmland [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Second mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Second mortgages [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Second mortgages [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Equity Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Equity Lines of Credit [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Equity Lines of Credit [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Agricultural, Installment and Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Agricultural, Installment and Other [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Agricultural, Installment and Other [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	$ 0	$ 0

Loans and Allowance for Loan 29

Loans and Allowance for Loan Losses - Summary of Carrying Balances of TDR's (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Total TDRS	$ 4,511	$ 4,596
Performing [Member]
Financing Receivable, Modifications [Line Items]
Total TDRS	3,485	3,277
Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Total TDRS	$ 1,026	$ 1,319

Loans and Allowance for Loan 30

Loans and Allowance for Loan Losses - Troubled Debt Restructuring Categorized by Loan (Detail) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017USD ($)contract	Dec. 31, 2016USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	6	9
Pre Modification Outstanding Recorded Investment	$ 400	$ 1,614
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 400	$ 1,494
Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	4
Pre Modification Outstanding Recorded Investment	$ 311	$ 130
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 311	$ 130
Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 0
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	2
Pre Modification Outstanding Recorded Investment	$ 0	$ 1,364
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 1,244
Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 0
Farmland [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1
Pre Modification Outstanding Recorded Investment	$ 86	$ 103
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 86	$ 103
Second mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 0
Equity Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 0
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 0
Agricultural, Installment and Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	2
Pre Modification Outstanding Recorded Investment	$ 3	$ 17
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 3	$ 17

Loans and Allowance for Loan 31

Loans and Allowance for Loan Losses - Summary of Loan Portfolio by Risk Rating (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Credit Risk Profile by Internally Assigned Rating
Total Loans	$ 1,742,538	$ 1,696,425
Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	1,726,360	1,680,267
Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	7,425	6,881
Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	8,753	9,277
Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Residential 1-4 Family [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	410,312	393,268
Residential 1-4 Family [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	401,120	384,383
Residential 1-4 Family [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	5,886	5,616
Residential 1-4 Family [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	3,306	3,269
Residential 1-4 Family [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Multifamily [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	108,994	109,410
Multifamily [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	108,994	109,410
Multifamily [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Multifamily [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Multifamily [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Commercial Real Estate [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	663,102	689,695
Commercial Real Estate [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	658,135	684,202
Commercial Real Estate [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	839	668
Commercial Real Estate [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	4,128	4,825
Commercial Real Estate [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Construction [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	352,725	297,315
Construction [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	352,426	297,089
Construction [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	86	121
Construction [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	213	105
Construction [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Farmland [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	42,136	46,314
Farmland [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	41,299	45,470
Farmland [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	151	147
Farmland [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	686	697
Farmland [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Second mortgages [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	8,440	9,193
Second mortgages [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	7,994	8,775
Second mortgages [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	295	303
Second mortgages [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	151	115
Second mortgages [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Equity Lines of Credit [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	57,988	56,038
Equity Lines of Credit [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	57,772	55,883
Equity Lines of Credit [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	64	0
Equity Lines of Credit [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	152	155
Equity Lines of Credit [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Commercial [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	49,257	40,301
Commercial [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	49,254	40,301
Commercial [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	3	0
Commercial [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Commercial [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	0	0
Agricultural, Installment and Other [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	49,584	54,891
Agricultural, Installment and Other [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	49,366	54,754
Agricultural, Installment and Other [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	101	26
Agricultural, Installment and Other [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	117	111
Agricultural, Installment and Other [Member] | Doubtful [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	$ 0	$ 0

Debt and Equity Securities - Su

Debt and Equity Securities - Summary of Debt and Equity Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	$ 299,900	$ 319,201
Available-for-sale, Gross Unrealized Gains	962	557
Available-for-sale, Gross Unrealized Losses	4,081	7,173
Total investment securities available-for-sale	296,781	312,585
Held-to-maturity securities, Amortized Cost	33,752	36,624
Held-to-maturity securities, Gross Unrealized Gains	212	190
Held-to-maturity securities, Gross Unrealized Losses	370	669
Held-to-maturity securities, Estimated Market Value	33,594	36,145
US Government-Sponsored Enterprises (GSEs) [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	64,147	61,879
Available-for-sale, Gross Unrealized Gains	11	0
Available-for-sale, Gross Unrealized Losses	1,476	2,391
Total investment securities available-for-sale	62,682	59,488
Government- Sponsored Enterprises (GSEs) Residential Mortgage Backed [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	159,569	166,316
Available-for-sale, Gross Unrealized Gains	738	496
Available-for-sale, Gross Unrealized Losses	1,418	2,447
Total investment securities available-for-sale	158,889	164,365
Held-to-maturity securities, Amortized Cost	11,073	11,856
Held-to-maturity securities, Gross Unrealized Gains	51	48
Held-to-maturity securities, Gross Unrealized Losses	121	230
Held-to-maturity securities, Estimated Market Value	11,003	11,674
SBAP [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	30,345	37,577
Available-for-sale, Gross Unrealized Gains	28	9
Available-for-sale, Gross Unrealized Losses	421	729
Total investment securities available-for-sale	29,952	36,857
Obligations of States and Political Subdivisions [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	45,839	53,429
Available-for-sale, Gross Unrealized Gains	185	52
Available-for-sale, Gross Unrealized Losses	766	1,606
Total investment securities available-for-sale	45,258	51,875
Held-to-maturity securities, Amortized Cost	22,679	24,768
Held-to-maturity securities, Gross Unrealized Gains	161	142
Held-to-maturity securities, Gross Unrealized Losses	249	439
Held-to-maturity securities, Estimated Market Value	$ 22,591	$ 24,471

Debt and Equity Securities - Ma

Debt and Equity Securities - Maturity of Amortized Cost and Estimated Market Value of Debt Securities (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity, Due in one year or less, Amortized Cost	$ 3,305
Held-to-maturity, Due after one year through five years, Amortized Cost	7,558
Held-to-maturity, Due after five years through ten years, Amortized Cost	9,871
Held-to-maturity, Due after ten years, Amortized Cost	13,018
Held-to-maturity, Gross Amortized Cost	33,752
Held-to-maturity, Due in one year or less, Estimated Market Value	3,311
Held-to-maturity, Due after one year through five years, Estimated Market Value	7,632
Held-to-maturity, Due after five years through ten years, Estimated Market Value	9,741
Held-to-maturity, Due after ten years, Estimated Market Value	12,910
Held-to-maturity, Gross Estimated Market Value	33,594
Available-for-sale securities, Due in one year or less, Amortized Cost	100
Available-for-sale securities, Due after one year through five years, Amortized Cost	25,152
Available-for-sale securities, Due after five years through ten years, Amortized Cost	120,594
Available-for-sale securities, Due after ten years, Amortized Cost	154,054
Available-for-sale securities, Gross Amortized Cost	299,900
Available-for-sale securities, Due in one year or less, Estimated Market Value	100
Available-for-sale securities, Due after one year through five years, Estimated Market Value	24,969
Available-for-sale securities, Due after five years through ten years, Estimated Market Value	119,192
Available-for-sale securities, Due after ten years, Estimated Market Value	152,520
Available-for-sale securities, Gross Estimated Market Value	$ 296,781

Debt and Equity Securities - Gr

Debt and Equity Securities - Gross Unrealized Losses and Fair Value of Company's Investments (Detail) $ in Thousands	Jun. 30, 2017USD ($)security	Dec. 31, 2016USD ($)security
Held To Maturity Debt Securities [Line Items]
Held to Maturity Securities, Fair Value, Less than 12 Month	$ 15,553	$ 24,258
Held to Maturity Securities, Unrealized losses, Less than 12 Month	$ 279	$ 590
Held to Maturity Securities, Number of securities included, Less than 12 Month | security	30	48
Held to Maturity Securities, Fair Value, 12 Month or More	$ 3,154	$ 1,704
Held to Maturity Securities, Unrealized losses, 12 Month or More	$ 91	$ 79
Held to Maturity Securities, Number of securities included, 12 Month or More | security	2	1
Held to Maturity Securities, Total Fair Value	$ 18,707	$ 25,962
Held to Maturity Securities, Total Unrealized Losses	370	669
Available-for-Sale Securities, Fair Value, Less than 12 Month	202,731	259,879
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 3,849	$ 7,076
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | security	157	220
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 12,326	$ 6,918
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 232	$ 97
Available-for-Sale Securities, Number of securities included, 12 Month or More | security	13	9
Available-for-Sale Securities, Total Fair Value	$ 215,057	$ 266,797
Available-for-Sale Securities, Total Unrealized Losses	4,081	7,173
US Government-Sponsored Enterprises (GSEs) [Member]
Held To Maturity Debt Securities [Line Items]
Available-for-Sale Securities, Fair Value, Less than 12 Month	58,822	59,488
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 1,426	$ 2,391
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | security	23	23
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 2,700	$ 0
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 50	$ 0
Available-for-Sale Securities, Number of securities included, 12 Month or More | security	1	0
Available-for-Sale Securities, Total Fair Value	$ 61,522	$ 59,488
Available-for-Sale Securities, Total Unrealized Losses	1,476	2,391
Government- Sponsored Enterprises (GSEs) Residential Mortgage Backed [Member]
Held To Maturity Debt Securities [Line Items]
Held to Maturity Securities, Fair Value, Less than 12 Month	5,367	8,177
Held to Maturity Securities, Unrealized losses, Less than 12 Month	$ 30	$ 151
Held to Maturity Securities, Number of securities included, Less than 12 Month | security	5	7
Held to Maturity Securities, Fair Value, 12 Month or More	$ 3,154	$ 1,704
Held to Maturity Securities, Unrealized losses, 12 Month or More	$ 91	$ 79
Held to Maturity Securities, Number of securities included, 12 Month or More | security	2	1
Held to Maturity Securities, Total Fair Value	$ 8,521	$ 9,881
Held to Maturity Securities, Total Unrealized Losses	121	230
Available-for-Sale Securities, Fair Value, Less than 12 Month	93,394	124,011
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 1,282	$ 2,350
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | security	52	64
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 7,484	$ 6,918
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 136	$ 97
Available-for-Sale Securities, Number of securities included, 12 Month or More | security	9	9
Available-for-Sale Securities, Total Fair Value	$ 100,878	$ 130,929
Available-for-Sale Securities, Total Unrealized Losses	1,418	2,447
SBAP [Member]
Held To Maturity Debt Securities [Line Items]
Available-for-Sale Securities, Fair Value, Less than 12 Month	24,249	33,579
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 421	$ 729
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | security	13	17
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 0	$ 0
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 0	$ 0
Available-for-Sale Securities, Number of securities included, 12 Month or More | security	0	0
Available-for-Sale Securities, Total Fair Value	$ 24,249	$ 33,579
Available-for-Sale Securities, Total Unrealized Losses	421	729
Obligations of States and Political Subdivisions [Member]
Held To Maturity Debt Securities [Line Items]
Held to Maturity Securities, Fair Value, Less than 12 Month	10,186	16,081
Held to Maturity Securities, Unrealized losses, Less than 12 Month	$ 249	$ 439
Held to Maturity Securities, Number of securities included, Less than 12 Month | security	25	41
Held to Maturity Securities, Fair Value, 12 Month or More	$ 0	$ 0
Held to Maturity Securities, Unrealized losses, 12 Month or More	$ 0	$ 0
Held to Maturity Securities, Number of securities included, 12 Month or More | security	0	0
Held to Maturity Securities, Total Fair Value	$ 10,186	$ 16,081
Held to Maturity Securities, Total Unrealized Losses	249	439
Available-for-Sale Securities, Fair Value, Less than 12 Month	26,266	42,801
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 720	$ 1,606
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | security	69	116
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 2,142	$ 0
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 46	$ 0
Available-for-Sale Securities, Number of securities included, 12 Month or More | security	3	0
Available-for-Sale Securities, Total Fair Value	$ 28,408	$ 42,801
Available-for-Sale Securities, Total Unrealized Losses	$ 766	$ 1,606

Earnings Per Share - Summary of

Earnings Per Share - Summary of Components Comprising Basic and Diluted Earnings Per Share (Detail) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)$ / sharesshares	Jun. 30, 2016USD ($)$ / sharesshares	Jun. 30, 2017USD ($)$ / sharesshares	Jun. 30, 2016USD ($)$ / sharesshares
Basic EPS Computation:
Numerator – Earnings available to common stockholders | $	$ 6,988	$ 6,270	$ 13,483	$ 11,913
Denominator – Weighted average number of common shares outstanding	10,381,860	10,257,536	10,371,377	10,248,742
Basic earnings per common share (in dollars per share) | $ / shares	$ 0.67	$ 0.61	$ 1.30	$ 1.16
Diluted EPS Computation:
Numerator – Earnings available to common stockholders | $	$ 6,988	$ 6,270	$ 13,483	$ 11,913
Denominator – Weighted average number of common shares outstanding	10,381,860	10,257,536	10,371,377	10,248,742
Dilutive effect of stock options (in shares)	5,216	4,780	5,031	4,854
Weighted average number of shares outstanding-diluted	10,387,076	10,262,316	10,376,408	10,253,596
Diluted earnings per common share (in dollars per share) | $ / shares	$ 0.67	$ 0.61	$ 1.30	$ 1.16
Shares of common stock issued per share held in stock split				1.3333

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	Jun. 30, 2017USD ($)
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0
Accrued interest related to uncertain tax positions	0
Accrued or recognized penalties related to uncertain tax positions	$ 0

Commitments and Contingent Li37

Commitments and Contingent Liabilities - Additional information (Detail)	6 Months Ended
	Jun. 30, 2017
Standby Letters of Credit [Member]
Commitment And Contingencies [Line Items]
Standby letters of credit term, or less	2 years

Commitments and Contingent Li38

Commitments and Contingent Liabilities - Total Contractual Amount for All Off-Balance Sheet Commitments (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Contractual amount for off-balance sheet commitments	$ 60,048
Commitments to Extend Credit [Member]
Loss Contingencies [Line Items]
Contractual amount for off-balance sheet commitments	$ 598,519

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	$ 296,781	$ 312,585
US Government-Sponsored Enterprises (GSEs) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	62,682	59,488
State and Municipal Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	45,258	51,875
Fair Value Measurements Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	296,781	312,585
Loans held for sale	7,233	14,788
Other assets	29,057	28,616
Total assets at fair value	333,071	355,989
Fair Value Measurements Recurring [Member] | Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Loans held for sale	0	0
Other assets	0	0
Total assets at fair value	0	0
Fair Value Measurements Recurring [Member] | Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	296,781	312,585
Loans held for sale	7,233	14,788
Other assets	0	0
Total assets at fair value	304,014	327,373
Fair Value Measurements Recurring [Member] | Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Loans held for sale	0	0
Other assets	29,057	28,616
Total assets at fair value	29,057	28,616
Fair Value Measurements Recurring [Member] | US Government-Sponsored Enterprises (GSEs) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	62,682	59,488
Fair Value Measurements Recurring [Member] | US Government-Sponsored Enterprises (GSEs) [Member] | Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | US Government-Sponsored Enterprises (GSEs) [Member] | Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	62,682	59,488
Fair Value Measurements Recurring [Member] | US Government-Sponsored Enterprises (GSEs) [Member] | Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | Mortgage Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	158,889	164,365
Fair Value Measurements Recurring [Member] | Mortgage Backed Securities [Member] | Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | Mortgage Backed Securities [Member] | Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	158,889	164,365
Fair Value Measurements Recurring [Member] | Mortgage Backed Securities [Member] | Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | Asset-backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	29,952	36,857
Fair Value Measurements Recurring [Member] | Asset-backed Securities [Member] | Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | Asset-backed Securities [Member] | Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	29,952	36,857
Fair Value Measurements Recurring [Member] | Asset-backed Securities [Member] | Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | State and Municipal Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	45,258	51,875
Fair Value Measurements Recurring [Member] | State and Municipal Securities [Member] | Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Fair Value Measurements Recurring [Member] | State and Municipal Securities [Member] | Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	45,258	51,875
Fair Value Measurements Recurring [Member] | State and Municipal Securities [Member] | Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	$ 0	$ 0

Fair Value Measurements - Ass40

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	$ 1,883	$ 4,527
Fair Value, Measurements, Nonrecurring [Member] | Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Impaired loans, net	0	0
Total	0	0
Fair Value, Measurements, Nonrecurring [Member] | Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Impaired loans, net	0	0
Total	0	0
Fair Value, Measurements, Nonrecurring [Member] | Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	1,883	4,527
Impaired loans, net	5,794	6,792
Total	7,677	11,319
Fair Value, Measurements, Nonrecurring [Member] | Reported Value Measurement [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	1,883	4,527
Impaired loans, net	5,794	6,792
Total	$ 7,677	$ 11,319

Fair Value Measurements - Ass41

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Narrative (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Valuation allowance	$ 434	$ 316
Reported Value Measurement [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Valuation allowance	$ 434	$ 316

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value Due to Observable Factors (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Other Assets	$ 28,616	$ 26,672
Total realized gains included in income, Other Assets	441	285
Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held, Other Assets	0	0
Purchases, issuances and settlements, net, Other Assets	0	1,916
Transfers out of Level 3, Other Assets	0	0
Fair value, Other Assets	29,057	28,873
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet	441	285
Other Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Other Liabilities	0	0
Total realized gains included in income, Other Liabilities	0	0
Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held, Other Liabilities	0	0
Purchases, issuances and settlements, net, Other Liabilities	0	0
Transfers out of Level 3, Other Liabilities	0	0
Fair value, Other Liabilities	0	0
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet	$ 0	$ 0

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held-to-maturity, Carrying/Notional Amount	$ 33,752	$ 36,624
Loans, net, Carrying/Notional Amount	1,711,691	1,667,088
Deposits and securities sold under agreements to repurchase, Carrying/Notional Amount	2,030,503	1,942,871
Commitments to extend credit, Carrying/Notional Amount	0	0
Standby letters of credit, Carrying/Notional Amount	0	0
Securities held-to-maturity, Estimated Fair Value	33,594	36,145
Loans, net, Estimated Fair Value	1,703,954	1,673,568
Deposits and securities sold under agreements to repurchase, Estimated Fair Value	1,824,334	1,631,032
Commitments to extend credit, Estimated Fair Value	0	0
Standby letters of credit, Estimated Fair Value	0	0
Quoted Market Prices in an Active Market (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held-to-maturity, Estimated Fair Value	0	0
Loans, net, Estimated Fair Value	0	0
Deposits and securities sold under agreements to repurchase, Estimated Fair Value	0	0
Commitments to extend credit, Estimated Fair Value	0	0
Standby letters of credit, Estimated Fair Value	0	0
Models with Significant Observable Market Parameters (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held-to-maturity, Estimated Fair Value	33,594	36,145
Loans, net, Estimated Fair Value	0	0
Deposits and securities sold under agreements to repurchase, Estimated Fair Value	0	0
Commitments to extend credit, Estimated Fair Value	0	0
Standby letters of credit, Estimated Fair Value	0	0
Models with Significant Unobservable Market Parameters (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held-to-maturity, Estimated Fair Value	0	0
Loans, net, Estimated Fair Value	1,703,954	1,673,568
Deposits and securities sold under agreements to repurchase, Estimated Fair Value	1,824,334	1,631,032
Commitments to extend credit, Estimated Fair Value	0	0
Standby letters of credit, Estimated Fair Value	$ 0	$ 0

Stock Option Plan, Equity Inc44

Stock Option Plan, Equity Incentive Plan & Charter Amendment - Narrative (Details) - $ / shares	1 Months Ended	6 Months Ended
	Apr. 30, 1999	Jun. 30, 2017	Jun. 30, 2016	Apr. 30, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized, as a percentage of shares issued and outstanding	5.00%
Stock option expiration period		10 years
Purchase price, as a percentage of the fair market value of common stock on grant date (equal to or greater than)		100.00%
1999 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)	200,000
2009 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)				100,000
Options available for grant (in shares)		49,400
2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)			750,000
Options [Member] | 2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options available for grant (in shares)		499,170
Grants in period (in shares)		122,790
Weighted average price of grants in period (in dollars per share)		$ 40.64
Stock Appreciation Rights (SARs) [Member] | 2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted in period (in shares)		128,040
Weighted average price of grants in period (in dollars per share)		$ 40.53

Stock Option Plan, Equity Inc45

Stock Option Plan, Equity Incentive Plan & Charter Amendment - Summary of Stock Option Activity (Details) - Employee Stock Options and Stock Appreciation Rights (SARs) [Member]	6 Months Ended
	Jun. 30, 2017$ / sharesshares
Shares
Options and SARs outstanding at beginning of year (in shares) | shares	183,847
Granted (in shares) | shares	110,833
Exercised (in shares) | shares	3,736
Forfeited or expired (in shares) | shares	322
Options and SARs outstanding at end of year (in shares) | shares	290,622
Options and SARs exercisable at year end (in shares) | shares	15,265
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options and SARs outstanding at beginning of year (in dollars per share) | $ / shares	$ 38.08
Granted (in dollars per share) | $ / shares	40.85
Exercised (in dollars per share) | $ / shares	28.29
Forfeited or expired (in dollars per share) | $ / shares	24.13
Options and SARs outstanding at end of year (in dollars per share) | $ / shares	39.28
Options and SARs exercisable at year end (in dollars per share) | $ / shares	$ 29.67

Stock Option Plan, Equity Inc46

Stock Option Plan, Equity Incentive Plan & Charter Amendment - Nonvested Share Activity (Details) - Employee Stock Options and Stock Appreciation Rights (SARs) [Member]	6 Months Ended
	Jun. 30, 2017$ / sharesshares
Shares
Non-vested options and SARs at beginning of period (in shares) | shares	170,294
Granted (in shares) | shares	110,833
Vested (in shares) | shares	(5,448)
Forfeited or expired (in shares) | shares	(322)
Non-vested options and SARs at end of period (in shares) | shares	275,357
Weighted Average Grant Date Fair Value
Non-vested options and SARs at beginning of period (in dollars per share) | $ / shares	$ 10.63
Granted (in dollars per share) | $ / shares	11.94
Vested (in dollars per share) | $ / shares	6.18
Forfeited or expired (in dollars per share) | $ / shares	1.61
Non-vested options and SARs at end of period (in dollars per share) | $ / shares	$ 11.77