Wilson Bank Holding (WBHC) 10-Q 10 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	May. 10, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
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		10,256,718

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Loans	$ 1,550,909	$ 1,466,079
Less: Allowance for loan losses	(22,899)	(22,900)
Net loans	1,528,010	1,443,179
Securities:
Held to maturity, at cost (market value $30,232 and $28,365, respectively)	29,962	28,195
Available-for-sale, at market (amortized cost $306,971 and $332,506, respectively)	308,359	331,128
Total securities	338,321	359,323
Loans held for sale	6,236	10,135
Restricted equity securities	3,012	3,012
Federal funds sold	35,640	35,220
Total earning assets	1,911,219	1,850,869
Cash and due from banks	64,905	74,033
Bank premises and equipment, net	42,014	42,100
Accrued interest receivable	5,265	5,244
Deferred income tax asset	7,580	8,039
Other real estate	5,565	5,410
Bank owned life insurance	18,072	17,733
Other assets	13,144	13,371
Goodwill	4,805	4,805
Total assets	2,072,569	2,021,604
Liabilities and Stockholders’ Equity
Deposits	1,828,042	1,789,850
Securities sold under repurchase agreements	777	2,035
Accrued interest and other liabilities	13,613	6,281
Total liabilities	1,842,432	1,798,166
Stockholders’ equity:
Common stock, $2.00 par value; authorized 15,000,000 shares, issued and outstanding 10,256,718 and 10,202,859 shares, respectively	20,513	20,406
Additional paid-in capital	58,156	56,237
Retained earnings	150,611	147,646
Net unrealized gains (losses) on available-for-sale securities, net of income taxes of $531 and $527, respectively	857	(851)
Total stockholders’ equity	230,137	223,438
Total liabilities and stockholders’ equity	$ 2,072,569	$ 2,021,604

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Held-to-maturity, market value	$ 30,232	$ 28,365
Available-for-sale, amortized cost	$ 306,971	$ 332,506
Common stock, par value (in dollars per share)	$ 2	$ 2
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	10,256,718	10,202,859
Net unrealized losses on available-for-sale securities, income taxes	$ 531	$ 527

Consolidated Statements of Earn

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income:
Interest and fees on loans	$ 18,513	$ 17,108
Interest and dividends on securities:
Taxable securities	1,411	1,611
Exempt from Federal income taxes	232	171
Interest on loans held for sale	74	70
Interest on Federal funds sold	77	37
Interest and dividends on restricted securities	30	30
Total interest income	20,337	19,027
Interest expense:
Interest on negotiable order of withdrawal accounts	376	366
Interest on money market and savings accounts	485	505
Interest on certificates of deposit	1,249	1,343
Interest on securities sold under repurchase agreements	1	2
Total interest expense	2,111	2,216
Net interest income before provision for loan losses	18,226	16,811
Provision for loan losses	67	75
Net interest income after provision for loan losses	18,159	16,736
Non-interest income:
Service charges on deposit accounts	1,336	1,099
Other fees and commissions	2,410	2,150
Income on BOLI and annuity contracts	124	391
Gain on sale of loans	667	863
Gain on sale of other real estate	49	18
Gain on sale of securities	117	0
Total non-interest income	4,703	4,521
Non-interest expense:
Salaries and employee benefits	8,193	7,252
Occupancy expenses, net	838	766
Furniture and equipment expense	519	498
Data processing expense	673	531
Directors’ fees	176	176
Other operating expenses	3,366	2,879
Loss on sale of other assets	0	1
Total non-interest expense	13,765	12,103
Earnings before income taxes	9,097	9,154
Income taxes	3,454	3,538
Net earnings	$ 5,643	$ 5,616
Weighted average number of shares outstanding-basic	10,238,798	10,129,861
Weighted average number of shares outstanding-diluted	10,243,026	10,134,374
Basic earnings per common share (in dollars per share)	$ 0.55	$ 0.55
Diluted earnings per common share (in dollars per share)	0.55	0.55
Dividends per share (in dollars per share)	$ 0.26	$ 0.23

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 5,643	$ 5,616
Other comprehensive earnings, net of tax:
Unrealized gains on available-for-sale securities arising during period, net of taxes of $1,103 and $731, respectively	1,780	1,179
Reclassification adjustment for net gains included in net earnings, net of taxes of $45	(72)	0
Other comprehensive earnings	1,708	1,179
Comprehensive earnings	$ 7,351	$ 6,795

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Earnings (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on available-for-sale securities arising during period, tax expense (benefit)	$ 1,103	$ 731
Reclassification adjustment for net gains included in net earnings, taxes	$ 45	$ 0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Interest received	$ 20,943	$ 19,278
Fees and commissions received	3,870	3,640
Proceeds from sale of loans held for sale	25,102	33,204
Origination of loans held for sale	(20,536)	(34,858)
Interest paid	(2,193)	(2,391)
Cash paid to suppliers and employees	(9,058)	(9,669)
Income taxes paid	(523)	(683)
Net cash provided by operating activities	17,605	8,521
Cash flows from investing activities:
Proceeds from maturities, calls, and principal payments of held-to-maturity securities	667	158
Proceeds from maturities, calls, and principal payments of available-for-sale securities	29,118	14,359
Proceeds from the sale of available-for-sale securities	5,983	0
Purchase of held-to-maturity securities	(2,509)	(249)
Purchase of available-for-sale securities	(10,001)	(3,053)
Loans made to customers, net of repayments	(85,020)	(26,096)
Purchase of Bank owned life insurance	(210)	(7,402)
Purchase of premises and equipment	(611)	(844)
Proceeds from sale of other real estate	0	388
Proceeds from sale of other assets	0	10
Net cash used in investing activities	(62,583)	(22,729)
Cash flows from financing activities:
Net increase in non-interest bearing, savings and NOW deposit accounts	39,451	49,385
Net decrease in time deposits	(1,259)	(7,320)
Net decrease in securities sold under repurchase agreements	(1,258)	(818)
Dividends paid	(2,678)	(2,272)
Proceeds from sale of common stock pursuant to dividend reinvestment	1,967	1,603
Proceeds from exercise of stock options	47	135
Net cash provided by financing activities	36,270	40,713
Net increase (decrease) in cash and cash equivalents	(8,708)	26,505
Cash and cash equivalents at beginning of period	109,253	68,007
Cash and cash equivalents at end of period	100,545	94,512
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	5,643	5,616
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation, amortization, and accretion	1,324	1,090
Provision for loan losses	67	75
Gain on sale other real estate	(49)	(18)
Security gains	(117)	0
Stock option compensation	12	13
Loss on the sale of other assets	0	1
Decrease (increase) in loans held for sale	3,899	(2,517)
Increase in deferred tax assets	(599)	(30)
Decrease (increase) in other assets, net	114	(120)
Increase in interest receivable	(21)	(222)
Increase in other liabilities	3,884	1,923
Increase in taxes payable	3,530	2,885
Decrease in interest payable	(82)	(175)
Total adjustments	11,962	2,905
Net cash provided by operating activities	17,605	8,521
Supplemental schedule of non-cash activities:
Unrealized gain in values of securities available-for-sale, net of taxes of $1,058 and $731 for the three months ended March 31, 2016 and 2015, respectively	1,708	1,179
Non-cash transfers from loans to other real estate	577	105
Non-cash transfers from other real estate to loans	471	0
Non-cash transfers from loans to other assets	$ 16	$ 0

Consolidated Statements of Cas8

Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Cash Flows [Abstract]
Unrealized gain (loss) in values of securities available-for-sale, taxes	$ 1,058	$ 731

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
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 financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2015. On March 15, 2016, the Company's board of directors approved a four-for-three stock split payable on March 30, 2016 to shareholders of record as of the close of business on March 24, 2016. As a result, the Company issued 2,564,091 shares of the Company's common stock, $2.00 per share, to the shareholders of record. Current and prior year earnings per share figures have been adjusted to reflect the stock split and the Company has elected to retroactively reclassify common stock and additional paid-in capital, which amounted to $5,102,000 . 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, 2015 . 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, 2015 . 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, 2015 and at March 31, 2016 , 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). Prior to January 1, 2015, loans with an identified weakness and principal balance of $100,000 or more were subject to individual identification for impairment. During the first quarter of 2015, the Company increased the threshold for identification of individually impaired loans to $500,000 , based on regulatory developments, continued improvement in loan quality trends and ratios and strengthening local economies in which the Company operates. Management believes that the increase to the threshold will not materially impact the calculation of the allowance for loan losses. 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 February 2016, the Financial Accounting Standards Board ("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 adjustment, such as 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 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 simplifies 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, the amendments in this ASU are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted for any organization in any interim or annual period; however, the Company chose not to adopt the pronouncement early. We currently do not expect this ASU to have a material impact our consolidated financial statements. Other than those previously discussed, there were no other recently issued accounting pronouncements that are expected to materially impact the Company.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 and December 31, 2015 : (In Thousands) March 31, December 31, Mortgage loans on real estate Residential 1-4 family $ 350,575 $ 349,631 Multifamily 77,088 49,564 Commercial 660,335 625,623 Construction and land development 294,722 275,319 Farmland 32,397 32,114 Second mortgages 8,102 7,551 Equity lines of credit 46,725 46,506 Total mortgage loans on real estate 1,469,944 1,386,308 Commercial loans 32,216 30,537 Agricultural loans 1,573 1,552 Consumer installment loans Personal 40,132 40,196 Credit cards 3,094 3,271 Total consumer installment loans 43,226 43,467 Other loans 9,190 9,250 1,556,149 1,471,114 Net deferred loan fees (5,240 ) (5,035 ) Total loans 1,550,909 1,466,079 Less: Allowance for loan losses (22,899 ) (22,900 ) Net loans $ 1,528,010 $ 1,443,179 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 incorporates 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 three months ended March 31, 2016 and year ended December 31, 2015 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 March 31, 2016 Allowance for loan losses: Beginning balance $ 5,024 619 9,986 5,136 654 106 594 301 480 22,900 Provision (70 ) 345 (82 ) (251 ) 11 7 (30 ) 20 117 67 Charge-offs — — — — — — — — (180 ) (180 ) Recoveries 21 — 1 3 — 1 9 1 76 112 Ending balance $ 4,975 964 9,905 4,888 665 114 573 322 493 22,899 Ending balance individually evaluated for impairment $ 183 — — — — — — — — 183 Ending balance collectively evaluated for impairment $ 4,792 964 9,905 4,888 665 114 573 322 493 22,716 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Loans: Ending balance $ 350,575 77,088 660,335 294,722 32,397 8,102 46,725 32,216 53,989 1,556,149 Ending balance individually evaluated for impairment $ 686 — 4,639 1,938 — — — — — 7,263 Ending balance collectively evaluated for impairment $ 349,889 77,088 655,696 292,784 32,397 8,102 46,725 32,216 53,989 1,548,886 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total December 31, 2015 Allowance for loan losses: Beginning balance $ 5,582 172 9,578 5,578 795 61 304 176 326 22,572 Provision (290 ) 447 (267 ) (455 ) (142 ) 87 303 118 587 388 Charge-offs (311 ) — (44 ) (26 ) — (45 ) (14 ) — (664 ) (1,104 ) Recoveries 43 — 719 39 1 3 1 7 231 1,044 Ending balance $ 5,024 619 9,986 5,136 654 106 594 301 480 22,900 Ending balance individually evaluated for impairment $ 194 — — — — — — — — 194 Ending balance collectively evaluated for impairment $ 4,830 619 9,986 5,136 654 106 594 301 480 22,706 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Loans: Ending balance $ 349,631 49,564 625,623 275,319 32,114 7,551 46,506 30,537 54,269 1,471,114 Ending balance individually evaluated for impairment $ 1,449 — 4,643 1,938 575 — — — — 8,605 Ending balance collectively evaluated for impairment $ 348,182 49,564 620,980 273,381 31,539 7,551 46,506 30,537 54,269 1,462,509 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Impaired Loans At March 31, 2016 , the Company had certain impaired loans of $ 4.3 million which were on non-accruing interest status. At December 31, 2015 , the Company had certain impaired loans of $4.9 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 March 31, 2016 and December 31, 2015 . In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized March 31, 2016 With no related allowance recorded: Residential 1-4 family $ 150 149 — 392 2 Multifamily — — — — — Commercial real estate 4,640 4,639 — 4,643 4 Construction 1,943 1,938 — 1,943 22 Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 6,733 6,726 — 6,978 28 With allowance recorded: Residential 1-4 family $ 540 537 183 687 8 Multifamily — — — — — Commercial real estate — — — — — Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 540 537 183 687 8 Total Residential 1-4 family $ 690 686 183 1,079 10 Multifamily — — — — — Commercial real estate 4,640 4,639 — 4,643 4 Construction 1,943 1,938 — 1,943 22 Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 7,273 7,263 183 7,665 36 In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized December 31, 2015 With no related allowance recorded: Residential 1-4 family $ 633 622 — 724 39 Multifamily — — — — — Commercial real estate 4,645 4,643 — 5,048 24 Construction 1,943 1,938 — 486 97 Farmland 575 575 — 431 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 7,796 7,778 — 6,689 160 With allowance recorded: Residential 1-4 family $ 834 827 194 785 47 Multifamily — — — — — Commercial real estate — — — 3,419 — Construction — — — — — Farmland — — — 144 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 834 827 194 4,348 47 Total: Residential 1-4 family $ 1,467 1,449 194 1,509 86 Multifamily — — — — — Commercial real estate 4,645 4,643 — 8,467 24 Construction 1,943 1,938 — 486 97 Farmland 575 575 — 575 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 8,630 8,605 194 11,037 207 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 have to 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 TDR’s at March 31, 2016 and December 31, 2015 . March 31, 2016 December 31, 2015 (In thousands) Performing TDRs $ 730 $ 983 Nonperforming TDRs 2,707 3,121 Total TDRS $ 3,437 $ 4,104 The following table outlines the amount of each troubled debt restructuring categorized by loan classification for the three months ended March 31, 2016 and the year ended December 31, 2015 (in thousands, except for number of contracts): March 31, 2016 December 31, 2015 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 2 $ 35 $ 35 2 $ 77 $ 77 Multifamily — — — — — — Commercial real estate — — — — — — Construction — — — 1 1,938 1,938 Farmland — — — — — — Second mortgages — — — — — — Equity lines of credit — — — — — — Commercial — — — — — — Agricultural, installment and other 1 3 3 1 2 1 Total 3 $ 38 $ 38 4 $ 2,017 $ 2,016 As of March 31, 2016 , the Company had one loan relationship in the amount of $57,000 that had been previously classified as troubled debt restructuring subsequently default within twelve months of restructuring. As of December 31, 2015 , the Company had two loans totaling $1,060,000 that had been previously classified as troubled debt restructuring 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 March 31, 2016 and December 31, 2015 , the Company’s recorded investment in consumer mortgage loans in the process of foreclosure amounted to $1,365,000 and $639,000 , respectively. Potential problem loans, which include nonperforming loans, amounted to approximately $25.3 million at March 31, 2016 compared to $25.2 million at December 31, 2015 . 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 the loan on nonaccrual status. The following table is a summary of the Bank’s loan portfolio by risk rating at March 31, 2016 and December 31, 2015: (In Thousands) Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, installment and other Total March 31, 2016 Credit Risk Profile by Internally Assigned Rating Pass $ 340,825 77,088 647,383 293,818 31,534 7,669 46,444 32,207 53,876 1,530,844 Special Mention 6,829 — 7,884 791 137 334 138 8 34 16,155 Substandard 2,921 — 5,068 113 726 99 143 1 79 9,150 Doubtful — — — — — — — — — — Total $ 350,575 77,088 660,335 294,722 32,397 8,102 46,725 32,216 53,989 1,556,149 December 31, 2015 Credit Risk Profile by Internally Assigned Rating Pass $ 340,019 49,564 612,318 274,926 30,933 7,097 46,361 30,525 54,154 1,445,897 Special Mention 6,957 — 8,227 277 200 353 — 10 38 16,062 Substandard 2,655 — 5,078 116 981 101 145 2 77 9,155 Doubtful — — — — — — — — — — Total $ 349,631 49,564 625,623 275,319 32,114 7,551 46,506 30,537 54,269 1,471,114

Debt and Equity Securities

Debt and Equity Securities	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 and December 31, 2015 are summarized as follows: March 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)* $ 53,304 $ 383 $ 115 $ 53,572 Mortgage-backed: GSE residential 191,822 983 447 192,358 Asset-backed: SBAP 29,585 237 8 29,814 Obligations of states and political subdivisions 32,260 386 31 32,615 $ 306,971 $ 1,989 $ 601 $ 308,359 March 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 $ 11,314 $ 80 $ 78 $ 11,316 Obligations of states and political subdivisions 18,648 273 5 18,916 $ 29,962 $ 353 $ 83 $ 30,232 * 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, 2015 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs)* $ 77,177 215 483 76,909 Mortgage-backed: GSE residential 192,983 430 1,498 191,915 Asset-backed: SBAP 31,253 54 273 31,034 Obligations of states and political subdivisions 31,093 274 97 31,270 $ 332,506 973 2,351 331,128 December 31, 2015 Securities Held-To-Maturity In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Mortgage-backed: Government-sponsored enterprises (GSEs)* residential $ 9,375 60 169 9,266 Obligations of states and political subdivisions 18,820 288 9 19,099 $ 28,195 348 178 28,365 * 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 March 31, 2016 , 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 $ 1,909 $ 1,918 $ — $ — Due after one year through five years 9,638 9,769 45,642 45,971 Due after five years through ten years 4,765 4,840 93,629 94,283 Due after ten years 13,650 13,705 167,700 168,105 $ 29,962 $ 30,232 $ 306,971 $ 308,359 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 March 31, 2016 and December 31, 2015 . In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total March 31, 2016 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 $ 1,462 $ 8 1 $ 2,539 $ 70 2 $ 4,001 $ 78 Obligations of states and political subdivisions 3,437 5 9 — — — 3,437 5 $ 4,899 $ 13 10 $ 2,539 $ 70 2 $ 7,438 $ 83 Available-for-Sale Securities: GSEs $ 8,738 $ 30 4 $ 14,372 $ 85 5 $ 23,110 $ 115 Mortgage-backed: GSE residential 68,450 371 32 5,706 76 8 74,156 447 Asset-backed: SBAP 5,992 8 2 — — — 5,992 8 Obligations of states and political subdivisions 5,333 22 14 725 9 2 6,058 31 $ 88,513 $ 431 52 $ 20,803 $ 170 15 $ 109,316 $ 601 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, 2015 Value Losses Included Value Losses Included Value Losses Held to Maturity Securities: Mortgage-backed: Government-sponsored enterprises (GSEs) residential $ 4,339 $ 45 3 $ 2,717 $ 124 3 $ 7,056 $ 169 Obligations of states and political subdivisions 3,461 9 10 — — — 3,461 9 $ 7,800 $ 54 13 $ 2,717 $ 124 3 $ 10,517 $ 178 Available-for-Sale Securities: GSEs $ 33,369 $ 232 12 $ 17,829 $ 251 6 $ 51,198 $ 483 Mortgage-backed: GSE residential 142,251 1,407 66 4,521 91 7 146,772 1,498 Asset-backed: SBAP 22,811 273 12 — — — 22,811 273 Obligations of states and political subdivisions 7,925 60 18 3,350 37 9 11,275 97 $ 206,356 $ 1,972 108 $ 25,700 $ 379 22 $ 232,056 $ 2,351 Unrealized losses on securities have not been recognized into income because the issuers’ securities are of high credit quality, management does not intend to sell the securities and it is likely that management will not 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 Company does not consider these securities to be other-than-temporarily impaired at March 31, 2016 . 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	3 Months Ended
	Mar. 31, 2016
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 months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (Dollars in Thousands Except Share and Per Share Amounts) Basic EPS Computation: Numerator – Earnings available to common stockholders 5,643 5,616 Denominator – Weighted average number of common shares outstanding 10,238,798 * 10,129,861 * Basic earnings per common share $ 0.55 $ 0.55 Diluted EPS Computation: Numerator – Earnings available to common stockholders 5,643 5,616 Denominator – Weighted average number of common shares outstanding 10,238,798 * 10,129,861 * Dilutive effect of stock options 4,228 * 4,513 * 10,243,026 10,134,374 Diluted earnings per common share $ 0.55 $ 0.55 * Adjusted for 4 for 3 stock split paid March 30, 2016.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 , 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 March 31, 2016 . As of March 31, 2016 , 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, 2012 through 2015 and the IRS for the years ended December 31, 2013 through 2015 .

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2016
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 beforehand 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 Company under certain prescribed circumstances. Subsequently, the Company would then seek reimbursement from the applicant pursuant to the terms of the standby letter of credit. The Company 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 March 31, 2016 is as follows: Commitments to extend credit $ 396,060,000 Standby letters of credit $ 34,607,000 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 March 31, 2016 will not have a material impact on the Company’s financial statements.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2016
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 and annuity contracts. The Company uses financial information received from insurance carriers indicating the performance of the insurance policies, cash surrender values, and annuity contracts 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 March 31, 2016 and December 31, 2015 , 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 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) March 31, 2016 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 53,572 — 53,572 — Mortgage-backed securities 192,358 — 192,358 — Asset-backed securities 29,814 — 29,814 — State and municipal securities 32,615 — 32,615 — Total investment securities available-for-sale 308,359 — 308,359 — Loans held for sale 6,236 — 6,236 — Other assets 27,006 — — 27,006 Total assets at fair value $ 341,601 — 314,595 27,006 December 31, 2015 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 76,909 — 76,909 — Mortgage-backed securities 191,915 — 191,915 — Asset-backed securities 31,034 — 31,034 — State and municipal securities 31,270 — 31,270 — Total investment securities available-for-sale 331,128 — 331,128 — Loans held for sale 10,135 — 10,135 — Other assets 26,672 — — 26,672 Total assets at fair value $ 367,935 — 341,263 26,672 Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis 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) March 31, 2016 Other real estate owned $ 5,565 — — 5,565 Impaired loans, net (¹) 7,090 — — 7,090 Total $ 12,655 — — 12,655 December 31, 2015 Other real estate owned $ 5,410 — — 5,410 Impaired loans, net (¹) 8,436 — — 8,436 Total $ 13,846 — — 13,846 (1) Amount is net of a valuation allowance of $183,000 at March 31, 2016 and $194,000 at December 31, 2015 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 three months ended March 31, 2016 , there were no transfers between Levels 1, 2 or 3. The table below includes a rollforward of the balance sheet amounts for the three months ended March 31, 2016 and 2015 (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 Three Months Ended March 31, 2016 2015 Other Assets Other Liabilities Other Assets Other Liabilities Fair value, January 1 $ 26,672 — $ 17,331 — Total realized gains included in income 124 — 392 — Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at March 31 — — — Purchases, issuances and settlements, net 210 — 7,402 — Transfers out of Level 3 — — — — Fair value, March 31 $ 27,006 — $ 25,125 — Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at March 31 $ 124 — 392 — 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 March 31, 2016 and December 31, 2015 . 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 March 31, 2016 and December 31, 2015 . 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) March 31, 2016 Financial assets: Securities held-to-maturity $ 29,962 30,232 — 30,232 — Loans, net 1,528,010 1,532,293 — — 1,532,293 Financial liabilities: Deposits and securities sold under agreements to repurchase 1,828,819 1,605,048 — — 1,605,048 Off-balance sheet instruments: Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2015 Financial assets: Securities held-to-maturity $ 28,195 28,365 — 28,365 — Loans, net 1,443,179 1,443,738 — — 1,443,738 Financial liabilities: Deposits and securities sold under agreements to repurchase 1,791,885 1,549,414 — — 1,549,414 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	3 Months Ended
	Mar. 31, 2016
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 stockholders of the Company approved the Wilson Bank Holding Company 1999 Stock Option Plan (the “1999 Stock Option Plan”). The 1999 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 the Bank. 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. The maximum number of shares of common stock with respect to which awards may be granted under the 2009 Stock Option Plan is 75,000 shares. As of March 31, 2016, the Company has 48,700 options available to grant to employees pursuant to the 2009 Stock Option Plan. During the second quarter of 2016, the Company’s shareholders approved the Wilson Bank Holding Company 2016 Equity Incentive Plan (the “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, contingent upon approval of the plan by the Company's shareholders. The 2016 Equity Incentive Plan was approved by the Company's shareholders on April 12, 2016. 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 March 31, 2016, no awards under the 2016 Equity Incentive Plan had been granted. During the second quarter of 2016, the shareholders of the Company approved and adopted a proposed amendment to the Company’s Charter, providing for an increase in the authorized number of shares of capital stock from 15,000,000 to 50,000,000 with 50,000,000 shares reserved for Common Stock and 100 shares reserved for Organizational Stock.

Summary of Significant Accoun17

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
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 financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2015. On March 15, 2016, the Company's board of directors approved a four-for-three stock split payable on March 30, 2016 to shareholders of record as of the close of business on March 24, 2016. As a result, the Company issued 2,564,091 shares of the Company's common stock, $2.00 per share, to the shareholders of record. Current and prior year earnings per share figures have been adjusted to reflect the stock split and the Company has elected to retroactively reclassify common stock and additional paid-in capital, which amounted to $5,102,000 . 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, 2015 . 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, 2015 .
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, 2015 and at March 31, 2016 , 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). Prior to January 1, 2015, loans with an identified weakness and principal balance of $100,000 or more were subject to individual identification for impairment. During the first quarter of 2015, the Company increased the threshold for identification of individually impaired loans to $500,000 , based on regulatory developments, continued improvement in loan quality trends and ratios and strengthening local economies in which the Company operates. Management believes that the increase to the threshold will not materially impact the calculation of the allowance for loan losses. 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 February 2016, the Financial Accounting Standards Board ("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 adjustment, such as 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 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 simplifies 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, the amendments in this ASU are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted for any organization in any interim or annual period; however, the Company chose not to adopt the pronouncement early. We currently do not expect this ASU to have a material impact our consolidated financial statements. Other than those previously discussed, there were no other recently issued accounting pronouncements that are expected to 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 March 31, 2016 , 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 March 31, 2016 .
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)	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Schedule of Details on Loans of Company	The following schedule details the loans of the Company at March 31, 2016 and December 31, 2015 : (In Thousands) March 31, December 31, Mortgage loans on real estate Residential 1-4 family $ 350,575 $ 349,631 Multifamily 77,088 49,564 Commercial 660,335 625,623 Construction and land development 294,722 275,319 Farmland 32,397 32,114 Second mortgages 8,102 7,551 Equity lines of credit 46,725 46,506 Total mortgage loans on real estate 1,469,944 1,386,308 Commercial loans 32,216 30,537 Agricultural loans 1,573 1,552 Consumer installment loans Personal 40,132 40,196 Credit cards 3,094 3,271 Total consumer installment loans 43,226 43,467 Other loans 9,190 9,250 1,556,149 1,471,114 Net deferred loan fees (5,240 ) (5,035 ) Total loans 1,550,909 1,466,079 Less: Allowance for loan losses (22,899 ) (22,900 ) Net loans $ 1,528,010 $ 1,443,179
Transactions in Allowance for Loan Losses	Transactions in the allowance for loan losses for the three months ended March 31, 2016 and year ended December 31, 2015 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 March 31, 2016 Allowance for loan losses: Beginning balance $ 5,024 619 9,986 5,136 654 106 594 301 480 22,900 Provision (70 ) 345 (82 ) (251 ) 11 7 (30 ) 20 117 67 Charge-offs — — — — — — — — (180 ) (180 ) Recoveries 21 — 1 3 — 1 9 1 76 112 Ending balance $ 4,975 964 9,905 4,888 665 114 573 322 493 22,899 Ending balance individually evaluated for impairment $ 183 — — — — — — — — 183 Ending balance collectively evaluated for impairment $ 4,792 964 9,905 4,888 665 114 573 322 493 22,716 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Loans: Ending balance $ 350,575 77,088 660,335 294,722 32,397 8,102 46,725 32,216 53,989 1,556,149 Ending balance individually evaluated for impairment $ 686 — 4,639 1,938 — — — — — 7,263 Ending balance collectively evaluated for impairment $ 349,889 77,088 655,696 292,784 32,397 8,102 46,725 32,216 53,989 1,548,886 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total December 31, 2015 Allowance for loan losses: Beginning balance $ 5,582 172 9,578 5,578 795 61 304 176 326 22,572 Provision (290 ) 447 (267 ) (455 ) (142 ) 87 303 118 587 388 Charge-offs (311 ) — (44 ) (26 ) — (45 ) (14 ) — (664 ) (1,104 ) Recoveries 43 — 719 39 1 3 1 7 231 1,044 Ending balance $ 5,024 619 9,986 5,136 654 106 594 301 480 22,900 Ending balance individually evaluated for impairment $ 194 — — — — — — — — 194 Ending balance collectively evaluated for impairment $ 4,830 619 9,986 5,136 654 106 594 301 480 22,706 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — — Loans: Ending balance $ 349,631 49,564 625,623 275,319 32,114 7,551 46,506 30,537 54,269 1,471,114 Ending balance individually evaluated for impairment $ 1,449 — 4,643 1,938 575 — — — — 8,605 Ending balance collectively evaluated for impairment $ 348,182 49,564 620,980 273,381 31,539 7,551 46,506 30,537 54,269 1,462,509 Ending balance loans acquired with deteriorated credit quality $ — — — — — — — — — —
Company's Impaired Loans	The following table presents the Company’s impaired loans at March 31, 2016 and December 31, 2015 . In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized March 31, 2016 With no related allowance recorded: Residential 1-4 family $ 150 149 — 392 2 Multifamily — — — — — Commercial real estate 4,640 4,639 — 4,643 4 Construction 1,943 1,938 — 1,943 22 Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 6,733 6,726 — 6,978 28 With allowance recorded: Residential 1-4 family $ 540 537 183 687 8 Multifamily — — — — — Commercial real estate — — — — — Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 540 537 183 687 8 Total Residential 1-4 family $ 690 686 183 1,079 10 Multifamily — — — — — Commercial real estate 4,640 4,639 — 4,643 4 Construction 1,943 1,938 — 1,943 22 Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 7,273 7,263 183 7,665 36 In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized December 31, 2015 With no related allowance recorded: Residential 1-4 family $ 633 622 — 724 39 Multifamily — — — — — Commercial real estate 4,645 4,643 — 5,048 24 Construction 1,943 1,938 — 486 97 Farmland 575 575 — 431 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 7,796 7,778 — 6,689 160 With allowance recorded: Residential 1-4 family $ 834 827 194 785 47 Multifamily — — — — — Commercial real estate — — — 3,419 — Construction — — — — — Farmland — — — 144 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 834 827 194 4,348 47 Total: Residential 1-4 family $ 1,467 1,449 194 1,509 86 Multifamily — — — — — Commercial real estate 4,645 4,643 — 8,467 24 Construction 1,943 1,938 — 486 97 Farmland 575 575 — 575 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 8,630 8,605 194 11,037 207
Summary of Carrying Balances of TDR's	The following table summarizes the carrying balances of TDR’s at March 31, 2016 and December 31, 2015 . March 31, 2016 December 31, 2015 (In thousands) Performing TDRs $ 730 $ 983 Nonperforming TDRs 2,707 3,121 Total TDRS $ 3,437 $ 4,104
Troubled Debt Restructuring Categorized by Loan	The following table outlines the amount of each troubled debt restructuring categorized by loan classification for the three months ended March 31, 2016 and the year ended December 31, 2015 (in thousands, except for number of contracts): March 31, 2016 December 31, 2015 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 2 $ 35 $ 35 2 $ 77 $ 77 Multifamily — — — — — — Commercial real estate — — — — — — Construction — — — 1 1,938 1,938 Farmland — — — — — — Second mortgages — — — — — — Equity lines of credit — — — — — — Commercial — — — — — — Agricultural, installment and other 1 3 3 1 2 1 Total 3 $ 38 $ 38 4 $ 2,017 $ 2,016
Summary of Loan Portfolio by Risk Rating	The following table is a summary of the Bank’s loan portfolio by risk rating at March 31, 2016 and December 31, 2015: (In Thousands) Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, installment and other Total March 31, 2016 Credit Risk Profile by Internally Assigned Rating Pass $ 340,825 77,088 647,383 293,818 31,534 7,669 46,444 32,207 53,876 1,530,844 Special Mention 6,829 — 7,884 791 137 334 138 8 34 16,155 Substandard 2,921 — 5,068 113 726 99 143 1 79 9,150 Doubtful — — — — — — — — — — Total $ 350,575 77,088 660,335 294,722 32,397 8,102 46,725 32,216 53,989 1,556,149 December 31, 2015 Credit Risk Profile by Internally Assigned Rating Pass $ 340,019 49,564 612,318 274,926 30,933 7,097 46,361 30,525 54,154 1,445,897 Special Mention 6,957 — 8,227 277 200 353 — 10 38 16,062 Substandard 2,655 — 5,078 116 981 101 145 2 77 9,155 Doubtful — — — — — — — — — — Total $ 349,631 49,564 625,623 275,319 32,114 7,551 46,506 30,537 54,269 1,471,114

Debt and Equity Securities (Tab

Debt and Equity Securities (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 and December 31, 2015 are summarized as follows: March 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)* $ 53,304 $ 383 $ 115 $ 53,572 Mortgage-backed: GSE residential 191,822 983 447 192,358 Asset-backed: SBAP 29,585 237 8 29,814 Obligations of states and political subdivisions 32,260 386 31 32,615 $ 306,971 $ 1,989 $ 601 $ 308,359 March 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 $ 11,314 $ 80 $ 78 $ 11,316 Obligations of states and political subdivisions 18,648 273 5 18,916 $ 29,962 $ 353 $ 83 $ 30,232 * 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, 2015 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs)* $ 77,177 215 483 76,909 Mortgage-backed: GSE residential 192,983 430 1,498 191,915 Asset-backed: SBAP 31,253 54 273 31,034 Obligations of states and political subdivisions 31,093 274 97 31,270 $ 332,506 973 2,351 331,128 December 31, 2015 Securities Held-To-Maturity In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Mortgage-backed: Government-sponsored enterprises (GSEs)* residential $ 9,375 60 169 9,266 Obligations of states and political subdivisions 18,820 288 9 19,099 $ 28,195 348 178 28,365 * 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 March 31, 2016 , 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 $ 1,909 $ 1,918 $ — $ — Due after one year through five years 9,638 9,769 45,642 45,971 Due after five years through ten years 4,765 4,840 93,629 94,283 Due after ten years 13,650 13,705 167,700 168,105 $ 29,962 $ 30,232 $ 306,971 $ 308,359
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 March 31, 2016 and December 31, 2015 . In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total March 31, 2016 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 $ 1,462 $ 8 1 $ 2,539 $ 70 2 $ 4,001 $ 78 Obligations of states and political subdivisions 3,437 5 9 — — — 3,437 5 $ 4,899 $ 13 10 $ 2,539 $ 70 2 $ 7,438 $ 83 Available-for-Sale Securities: GSEs $ 8,738 $ 30 4 $ 14,372 $ 85 5 $ 23,110 $ 115 Mortgage-backed: GSE residential 68,450 371 32 5,706 76 8 74,156 447 Asset-backed: SBAP 5,992 8 2 — — — 5,992 8 Obligations of states and political subdivisions 5,333 22 14 725 9 2 6,058 31 $ 88,513 $ 431 52 $ 20,803 $ 170 15 $ 109,316 $ 601 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, 2015 Value Losses Included Value Losses Included Value Losses Held to Maturity Securities: Mortgage-backed: Government-sponsored enterprises (GSEs) residential $ 4,339 $ 45 3 $ 2,717 $ 124 3 $ 7,056 $ 169 Obligations of states and political subdivisions 3,461 9 10 — — — 3,461 9 $ 7,800 $ 54 13 $ 2,717 $ 124 3 $ 10,517 $ 178 Available-for-Sale Securities: GSEs $ 33,369 $ 232 12 $ 17,829 $ 251 6 $ 51,198 $ 483 Mortgage-backed: GSE residential 142,251 1,407 66 4,521 91 7 146,772 1,498 Asset-backed: SBAP 22,811 273 12 — — — 22,811 273 Obligations of states and political subdivisions 7,925 60 18 3,350 37 9 11,275 97 $ 206,356 $ 1,972 108 $ 25,700 $ 379 22 $ 232,056 $ 2,351

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2016
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 months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (Dollars in Thousands Except Share and Per Share Amounts) Basic EPS Computation: Numerator – Earnings available to common stockholders 5,643 5,616 Denominator – Weighted average number of common shares outstanding 10,238,798 * 10,129,861 * Basic earnings per common share $ 0.55 $ 0.55 Diluted EPS Computation: Numerator – Earnings available to common stockholders 5,643 5,616 Denominator – Weighted average number of common shares outstanding 10,238,798 * 10,129,861 * Dilutive effect of stock options 4,228 * 4,513 * 10,243,026 10,134,374 Diluted earnings per common share $ 0.55 $ 0.55 * Adjusted for 4 for 3 stock split paid March 30, 2016.

Commitments and Contingent Li21

Commitments and Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 is as follows: Commitments to extend credit $ 396,060,000 Standby letters of credit $ 34,607,000

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 and December 31, 2015 , 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 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) March 31, 2016 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 53,572 — 53,572 — Mortgage-backed securities 192,358 — 192,358 — Asset-backed securities 29,814 — 29,814 — State and municipal securities 32,615 — 32,615 — Total investment securities available-for-sale 308,359 — 308,359 — Loans held for sale 6,236 — 6,236 — Other assets 27,006 — — 27,006 Total assets at fair value $ 341,601 — 314,595 27,006 December 31, 2015 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 76,909 — 76,909 — Mortgage-backed securities 191,915 — 191,915 — Asset-backed securities 31,034 — 31,034 — State and municipal securities 31,270 — 31,270 — Total investment securities available-for-sale 331,128 — 331,128 — Loans held for sale 10,135 — 10,135 — Other assets 26,672 — — 26,672 Total assets at fair value $ 367,935 — 341,263 26,672
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis	Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis 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) March 31, 2016 Other real estate owned $ 5,565 — — 5,565 Impaired loans, net (¹) 7,090 — — 7,090 Total $ 12,655 — — 12,655 December 31, 2015 Other real estate owned $ 5,410 — — 5,410 Impaired loans, net (¹) 8,436 — — 8,436 Total $ 13,846 — — 13,846 (1) Amount is net of a valuation allowance of $183,000 at March 31, 2016 and $194,000 at December 31, 2015 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 three months ended March 31, 2016 and 2015 (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 Three Months Ended March 31, 2016 2015 Other Assets Other Liabilities Other Assets Other Liabilities Fair value, January 1 $ 26,672 — $ 17,331 — Total realized gains included in income 124 — 392 — Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at March 31 — — — Purchases, issuances and settlements, net 210 — 7,402 — Transfers out of Level 3 — — — — Fair value, March 31 $ 27,006 — $ 25,125 — Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at March 31 $ 124 — 392 —
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 March 31, 2016 and December 31, 2015 . 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) March 31, 2016 Financial assets: Securities held-to-maturity $ 29,962 30,232 — 30,232 — Loans, net 1,528,010 1,532,293 — — 1,532,293 Financial liabilities: Deposits and securities sold under agreements to repurchase 1,828,819 1,605,048 — — 1,605,048 Off-balance sheet instruments: Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2015 Financial assets: Securities held-to-maturity $ 28,195 28,365 — 28,365 — Loans, net 1,443,179 1,443,738 — — 1,443,738 Financial liabilities: Deposits and securities sold under agreements to repurchase 1,791,885 1,549,414 — — 1,549,414 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.

Summary of Significant Accoun23

Summary of Significant Accounting Policies - Additional Information (Detail)	Mar. 24, 2016USD ($)$ / sharesshares	Mar. 15, 2016	Mar. 31, 2016USD ($)$ / shares	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2015$ / shares
Accounting Policies [Abstract]
Shares of common stock issued per share held in stock split		1.3333
Common stock issued for stock split (in shares) | shares	2,564,091
Common stock, par value (in dollars per share) | $ / shares	$ 2		$ 2			$ 2
Adjustments to common stock and additional paid-in capital, stock split	$ 5,102,000
Minimum past due of loans for nonaccrual status			90 days
Loans with identified weakness and principal balance				$ 500,000	$ 100,000
Assignment of valuation allowance for specified amount of loan (less than)			$ 500,000

Loans and Allowance for Loan 24

Loans and Allowance for Loan Losses - Schedule of Details on Loans of Company (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Mortgage loans on real estate
Total mortgage loans on real estate	$ 1,469,944	$ 1,386,308
Agricultural loans	1,573	1,552
Total Loans	1,556,149	1,471,114
Net deferred loan fees	(5,240)	(5,035)
Total loans	1,550,909	1,466,079
Less: Allowance for loan losses	(22,899)	(22,900)	$ (22,572)
Net loans	1,528,010	1,443,179
Residential 1-4 Family [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	350,575	349,631
Total Loans	350,575	349,631
Less: Allowance for loan losses	(4,975)	(5,024)	(5,582)
Multifamily [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	77,088	49,564
Total Loans	77,088	49,564
Less: Allowance for loan losses	(964)	(619)	(172)
Commercial [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	660,335	625,623
Total Loans	660,335	625,623
Less: Allowance for loan losses	(9,905)	(9,986)	(9,578)
Construction and land development [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	294,722	275,319
Total Loans	294,722	275,319
Less: Allowance for loan losses	(4,888)	(5,136)	(5,578)
Farmland [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	32,397	32,114
Total Loans	32,397	32,114
Less: Allowance for loan losses	(665)	(654)	(795)
Second Mortgages [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	8,102	7,551
Total Loans	8,102	7,551
Less: Allowance for loan losses	(114)	(106)	(61)
Equity Lines of Credit [Member]
Mortgage loans on real estate
Total mortgage loans on real estate	46,725	46,506
Total Loans	46,725	46,506
Less: Allowance for loan losses	(573)	(594)	$ (304)
Commercial [Member]
Mortgage loans on real estate
Total Loans	32,216	30,537
Consumer [Member]
Mortgage loans on real estate
Total Loans	43,226	43,467
Consumer [Member] | Personal [Member]
Mortgage loans on real estate
Total Loans	40,132	40,196
Consumer [Member] | Credit Cards [Member]
Mortgage loans on real estate
Total Loans	3,094	3,271
Other [Member]
Mortgage loans on real estate
Total Loans	$ 9,190	$ 9,250

Loans and Allowance for Loan 25

Loans and Allowance for Loan Losses - Transactions in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Allowance for loan losses:
Beginning balance	$ 22,900	$ 22,572
Provision	67	388
Charge-offs	(180)	(1,104)
Recoveries	112	1,044
Ending balance	22,899	22,900
Ending balance individually evaluated for impairment	183	194
Ending balance collectively evaluated for impairment	22,716	22,706
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	1,556,149	1,471,114
Ending balance individually evaluated for impairment	7,263	8,605
Ending balance collectively evaluated for impairment	1,548,886	1,462,509
Ending balance loans acquired with deteriorated credit quality	0	0
Residential 1-4 Family [Member]
Allowance for loan losses:
Beginning balance	5,024	5,582
Provision	(70)	(290)
Charge-offs	0	(311)
Recoveries	21	43
Ending balance	4,975	5,024
Ending balance individually evaluated for impairment	183	194
Ending balance collectively evaluated for impairment	4,792	4,830
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	350,575	349,631
Ending balance individually evaluated for impairment	686	1,449
Ending balance collectively evaluated for impairment	349,889	348,182
Ending balance loans acquired with deteriorated credit quality	0	0
Multifamily [Member]
Allowance for loan losses:
Beginning balance	619	172
Provision	345	447
Charge-offs	0	0
Recoveries	0	0
Ending balance	964	619
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	964	619
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	77,088	49,564
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	77,088	49,564
Ending balance loans acquired with deteriorated credit quality	0	0
Commercial Real Estate [Member]
Allowance for loan losses:
Beginning balance	9,986	9,578
Provision	(82)	(267)
Charge-offs	0	(44)
Recoveries	1	719
Ending balance	9,905	9,986
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	9,905	9,986
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	660,335	625,623
Ending balance individually evaluated for impairment	4,639	4,643
Ending balance collectively evaluated for impairment	655,696	620,980
Ending balance loans acquired with deteriorated credit quality	0	0
Construction [Member]
Allowance for loan losses:
Beginning balance	5,136	5,578
Provision	(251)	(455)
Charge-offs	0	(26)
Recoveries	3	39
Ending balance	4,888	5,136
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	4,888	5,136
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	294,722	275,319
Ending balance individually evaluated for impairment	1,938	1,938
Ending balance collectively evaluated for impairment	292,784	273,381
Ending balance loans acquired with deteriorated credit quality	0	0
Farmland [Member]
Allowance for loan losses:
Beginning balance	654	795
Provision	11	(142)
Charge-offs	0	0
Recoveries	0	1
Ending balance	665	654
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	665	654
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	32,397	32,114
Ending balance individually evaluated for impairment	0	575
Ending balance collectively evaluated for impairment	32,397	31,539
Ending balance loans acquired with deteriorated credit quality	0	0
Second Mortgages [Member]
Allowance for loan losses:
Beginning balance	106	61
Provision	7	87
Charge-offs	0	(45)
Recoveries	1	3
Ending balance	114	106
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	114	106
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	8,102	7,551
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	8,102	7,551
Ending balance loans acquired with deteriorated credit quality	0	0
Equity Lines of Credit [Member]
Allowance for loan losses:
Beginning balance	594	304
Provision	(30)	303
Charge-offs	0	(14)
Recoveries	9	1
Ending balance	573	594
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	573	594
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	46,725	46,506
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	46,725	46,506
Ending balance loans acquired with deteriorated credit quality	0	0
Commercial [Member]
Allowance for loan losses:
Beginning balance	301	176
Provision	20	118
Charge-offs	0	0
Recoveries	1	7
Ending balance	322	301
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	322	301
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	32,216	30,537
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	32,216	30,537
Ending balance loans acquired with deteriorated credit quality	0	0
Agricultural, Installment and Other [Member]
Allowance for loan losses:
Beginning balance	480	326
Provision	117	587
Charge-offs	(180)	(664)
Recoveries	76	231
Ending balance	493	480
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	493	480
Ending balance loans acquired with deteriorated credit quality	0	0
Loans:
Ending balance	53,989	54,269
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	53,989	54,269
Ending balance loans acquired with deteriorated credit quality	$ 0	$ 0

Loans and Allowance for Loan 26

Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)Loans	Dec. 31, 2015USD ($)Loans
Financing Receivable, Recorded Investment [Line Items]
Threshold percentage of repayment derived from non-affiliated third party (as a percent)	50.00%
Impaired loans, net	$ 4,300	$ 4,900
Troubled debt restructuring number of loans | Loans	1	2
Troubled debt restructurings subsequently default within twelve months	$ 57	$ 1,060
Consumer mortgage loans	1,365	639
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Potential problem loans	$ 25,300	$ 25,200
Residential 1-4 Family [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

Loans and Allowance for Loan 27

Loans and Allowance for Loan Losses - Company's Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 7,273	$ 8,630
Unpaid Principal Balance	7,263	8,605
Related Allowance	183	194
Average Recorded Investment	7,665	11,037
Interest Income Recognized	36	207
With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,733	7,796
Unpaid Principal Balance	6,726	7,778
Average Recorded Investment	6,978	6,689
Interest Income Recognized	28	160
With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	540	834
Unpaid Principal Balance	537	827
Related Allowance	183	194
Average Recorded Investment	687	4,348
Interest Income Recognized	8	47
Residential 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	690	1,467
Unpaid Principal Balance	686	1,449
Related Allowance	183	194
Average Recorded Investment	1,079	1,509
Interest Income Recognized	10	86
Residential 1-4 Family [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	150	633
Unpaid Principal Balance	149	622
Average Recorded Investment	392	724
Interest Income Recognized	2	39
Residential 1-4 Family [Member] | With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	540	834
Unpaid Principal Balance	537	827
Related Allowance	183	194
Average Recorded Investment	687	785
Interest Income Recognized	8	47
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	4,640	4,645
Unpaid Principal Balance	4,639	4,643
Related Allowance	0	0
Average Recorded Investment	4,643	8,467
Interest Income Recognized	4	24
Commercial Real Estate [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,640	4,645
Unpaid Principal Balance	4,639	4,643
Average Recorded Investment	4,643	5,048
Interest Income Recognized	4	24
Commercial Real Estate [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	3,419
Interest Income Recognized	0	0
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,943	1,943
Unpaid Principal Balance	1,938	1,938
Related Allowance	0	0
Average Recorded Investment	1,943	486
Interest Income Recognized	22	97
Construction [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,943	1,943
Unpaid Principal Balance	1,938	1,938
Average Recorded Investment	1,943	486
Interest Income Recognized	22	97
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	575
Unpaid Principal Balance	0	575
Related Allowance	0	0
Average Recorded Investment	0	575
Interest Income Recognized	0	0
Farmland [Member] | With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	575
Unpaid Principal Balance	0	575
Average Recorded Investment	0	431
Interest Income Recognized	0	0
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	144
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 28

Loans and Allowance for Loan Losses - Summary of Carrying Balances of TDR's (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Total TDRS	$ 3,437	$ 4,104
Performing [Member]
Financing Receivable, Modifications [Line Items]
Total TDRS	730	983
Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Total TDRS	$ 2,707	$ 3,121

Loans and Allowance for Loan 29

Loans and Allowance for Loan Losses - Troubled Debt Restructuring Categorized by Loan (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)Contract	Dec. 31, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	3	4
Pre Modification Outstanding Recorded Investment	$ 38	$ 2,017
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 38	$ 2,016
Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	2
Pre Modification Outstanding Recorded Investment	$ 35	$ 77
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 35	$ 77
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	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 0
Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	1
Pre Modification Outstanding Recorded Investment	$ 0	$ 1,938
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 1,938
Farmland [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
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	1
Pre Modification Outstanding Recorded Investment	$ 3	$ 2
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 3	$ 1

Loans and Allowance for Loan 30

Loans and Allowance for Loan Losses - Summary of Loan Portfolio by Risk Rating (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Credit Risk Profile by Internally Assigned Rating
Total Loans	$ 1,556,149	$ 1,471,114
Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	1,530,844	1,445,897
Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	16,155	16,062
Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	9,150	9,155
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	350,575	349,631
Residential 1-4 Family [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	340,825	340,019
Residential 1-4 Family [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	6,829	6,957
Residential 1-4 Family [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	2,921	2,655
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	77,088	49,564
Multifamily [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	77,088	49,564
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	660,335	625,623
Commercial Real Estate [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	647,383	612,318
Commercial Real Estate [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	7,884	8,227
Commercial Real Estate [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	5,068	5,078
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	294,722	275,319
Construction [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	293,818	274,926
Construction [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	791	277
Construction [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	113	116
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	32,397	32,114
Farmland [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	31,534	30,933
Farmland [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	137	200
Farmland [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	726	981
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	8,102	7,551
Second Mortgages [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	7,669	7,097
Second Mortgages [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	334	353
Second Mortgages [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	99	101
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	46,725	46,506
Equity Lines of Credit [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	46,444	46,361
Equity Lines of Credit [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	138	0
Equity Lines of Credit [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	143	145
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	32,216	30,537
Commercial [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	32,207	30,525
Commercial [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	8	10
Commercial [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	1	2
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	53,989	54,269
Agricultural, Installment and Other [Member] | Pass [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	53,876	54,154
Agricultural, Installment and Other [Member] | Special Mention [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	34	38
Agricultural, Installment and Other [Member] | Substandard [Member]
Credit Risk Profile by Internally Assigned Rating
Total Loans	79	77
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	Mar. 31, 2016	Dec. 31, 2015
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	$ 306,971	$ 332,506
Available-for-sale, Gross Unrealized Gains	1,989	973
Available-for-sale, Gross Unrealized Losses	601	2,351
Total investment securities available-for-sale	308,359	331,128
Held-To-Maturity Securities, Amortized Cost	29,962	28,195
Held-To-Maturity Securities, Gross Unrealized Gains	353	348
Held-To-Maturity Securities, Gross Unrealized Losses	83	178
Held-To-Maturity Securities, Estimated Market Value	30,232	28,365
US Government-Sponsored Enterprises (GSEs) [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	53,304	77,177
Available-for-sale, Gross Unrealized Gains	383	215
Available-for-sale, Gross Unrealized Losses	115	483
Total investment securities available-for-sale	53,572	76,909
Government- Sponsored Enterprises (GSEs) Residential Mortgage Backed [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	191,822	192,983
Available-for-sale, Gross Unrealized Gains	983	430
Available-for-sale, Gross Unrealized Losses	447	1,498
Total investment securities available-for-sale	192,358	191,915
Held-To-Maturity Securities, Amortized Cost	11,314	9,375
Held-To-Maturity Securities, Gross Unrealized Gains	80	60
Held-To-Maturity Securities, Gross Unrealized Losses	78	169
Held-To-Maturity Securities, Estimated Market Value	11,316	9,266
SBAP [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	29,585	31,253
Available-for-sale, Gross Unrealized Gains	237	54
Available-for-sale, Gross Unrealized Losses	8	273
Total investment securities available-for-sale	29,814	31,034
Obligations of States and Political Subdivisions [Member]
Summary Of Debt And Equity Securities [Line Items]
Available-for-sale, Amortized Cost	32,260	31,093
Available-for-sale, Gross Unrealized Gains	386	274
Available-for-sale, Gross Unrealized Losses	31	97
Total investment securities available-for-sale	32,615	31,270
Held-To-Maturity Securities, Amortized Cost	18,648	18,820
Held-To-Maturity Securities, Gross Unrealized Gains	273	288
Held-To-Maturity Securities, Gross Unrealized Losses	5	9
Held-To-Maturity Securities, Estimated Market Value	$ 18,916	$ 19,099

Debt and Equity Securities - Ma

Debt and Equity Securities - Maturity of Amortized Cost and Estimated Market Value of Debt Securities (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Investments, Debt and Equity Securities [Abstract]
Available-for-sale securities, Due in one year or less, Amortized Cost	$ 1,909
Available-for-sale securities, Due after one year through five years, Amortized Cost	9,638
Available-for-sale securities, Due after five years through ten years, Amortized Cost	4,765
Available-for-sale securities, Due after ten years, Amortized Cost	13,650
Available-for-sale securities, Gross Amortized Cost	29,962
Available-for-sale securities, Due in one year or less, Estimated Market Value	1,918
Available-for-sale securities, Due after one year through five years, Estimated Market Value	9,769
Available-for-sale securities, Due after five years through ten years, Estimated Market Value	4,840
Available-for-sale securities, Due after ten years, Estimated Market Value	13,705
Available-for-sale securities, Gross Estimated Market Value	30,232
Held-to-maturity, Due in one year or less, Amortized Cost	0
Held-to-maturity, Due after one year through five years, Amortized Cost	45,642
Held-to-maturity, Due after five years through ten years, Amortized Cost	93,629
Held-to-maturity, Due after ten years, Amortized Cost	167,700
Held-to-maturity, Gross Amortized Cost	306,971
Held-to-maturity, Due in one year or less, Estimated Market Value	0
Held-to-maturity, Due after one year through five years, Estimated Market Value	45,971
Held-to-maturity, Due after five years through ten years, Estimated Market Value	94,283
Held-to-maturity, Due after ten years, Estimated Market Value	168,105
Held-to-maturity, Gross Estimated Market Value	$ 308,359

Debt and Equity Securities - Gr

Debt and Equity Securities - Gross Unrealized Losses and Fair Value of Company's Investments (Detail) $ in Thousands	Mar. 31, 2016USD ($)Security	Dec. 31, 2015USD ($)Security
Held To Maturity Debt Securities [Line Items]
Held to Maturity Securities, Fair Value, Less than 12 Month	$ 4,899	$ 7,800
Held to Maturity Securities, Unrealized losses, Less than 12 Month	$ 13	$ 54
Held to Maturity Securities, Number of securities included, Less than 12 Month | Security	10	13
Held to Maturity Securities, Fair Value, 12 Month or More	$ 2,539	$ 2,717
Held to Maturity Securities, Unrealized losses, 12 Month or More	$ 70	$ 124
Held to Maturity Securities, Number of securities included, 12 Month or More | Security	2	3
Held to Maturity Securities, Total Fair Value	$ 7,438	$ 10,517
Held to Maturity Securities, Total Unrealized Losses	83	178
Available-for-Sale Securities, Fair Value, Less than 12 Month	88,513	206,356
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 431	$ 1,972
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | Security	52	108
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 20,803	$ 25,700
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 170	$ 379
Available-for-Sale Securities, Number of securities included, 12 Month or More | Security	15	22
Available-for-Sale Securities, Total Fair Value	$ 109,316	$ 232,056
Available-for-Sale Securities, Total Unrealized Losses	601	2,351
US Government-Sponsored Enterprises (GSEs) [Member]
Held To Maturity Debt Securities [Line Items]
Available-for-Sale Securities, Fair Value, Less than 12 Month	8,738	33,369
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 30	$ 232
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | Security	4	12
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 14,372	$ 17,829
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 85	$ 251
Available-for-Sale Securities, Number of securities included, 12 Month or More | Security	5	6
Available-for-Sale Securities, Total Fair Value	$ 23,110	$ 51,198
Available-for-Sale Securities, Total Unrealized Losses	115	483
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	1,462	4,339
Held to Maturity Securities, Unrealized losses, Less than 12 Month	$ 8	$ 45
Held to Maturity Securities, Number of securities included, Less than 12 Month | Security	1	3
Held to Maturity Securities, Fair Value, 12 Month or More	$ 2,539	$ 2,717
Held to Maturity Securities, Unrealized losses, 12 Month or More	$ 70	$ 124
Held to Maturity Securities, Number of securities included, 12 Month or More | Security	2	3
Held to Maturity Securities, Total Fair Value	$ 4,001	$ 7,056
Held to Maturity Securities, Total Unrealized Losses	78	169
Available-for-Sale Securities, Fair Value, Less than 12 Month	68,450	142,251
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 371	$ 1,407
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | Security	32	66
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 5,706	$ 4,521
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 76	$ 91
Available-for-Sale Securities, Number of securities included, 12 Month or More | Security	8	7
Available-for-Sale Securities, Total Fair Value	$ 74,156	$ 146,772
Available-for-Sale Securities, Total Unrealized Losses	447	1,498
SBAP [Member]
Held To Maturity Debt Securities [Line Items]
Available-for-Sale Securities, Fair Value, Less than 12 Month	5,992	22,811
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 8	$ 273
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | Security	2	12
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	$ 5,992	$ 22,811
Available-for-Sale Securities, Total Unrealized Losses	8	273
Obligations of States and Political Subdivisions [Member]
Held To Maturity Debt Securities [Line Items]
Held to Maturity Securities, Fair Value, Less than 12 Month	3,437	3,461
Held to Maturity Securities, Unrealized losses, Less than 12 Month	$ 5	$ 9
Held to Maturity Securities, Number of securities included, Less than 12 Month | Security	9	10
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	$ 3,437	$ 3,461
Held to Maturity Securities, Total Unrealized Losses	5	9
Available-for-Sale Securities, Fair Value, Less than 12 Month	5,333	7,925
Available-for-Sale Securities, Unrealized Losses, Less than 12 Month	$ 22	$ 60
Available-for-Sale Securities, Number of Securities Included, Less than 12 Month | Security	14	18
Available-for-Sale Securities, Fair Value, 12 Month or More	$ 725	$ 3,350
Available-for-Sale Securities, Unrealized Loss, 12 Month or More	$ 9	$ 37
Available-for-Sale Securities, Number of securities included, 12 Month or More | Security	2	9
Available-for-Sale Securities, Total Fair Value	$ 6,058	$ 11,275
Available-for-Sale Securities, Total Unrealized Losses	$ 31	$ 97

Earnings Per Share - Summary of

Earnings Per Share - Summary of Components Comprising Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic EPS Computation:
Numerator – Earnings available to common stockholders	$ 5,643	$ 5,616
Denominator – Weighted average number of common shares outstanding	10,238,798	10,129,861
Basic earnings per common share (in dollars per share)	$ 0.55	$ 0.55
Diluted EPS Computation:
Numerator – Earnings available to common stockholders	$ 5,643	$ 5,616
Denominator – Weighted average number of common shares outstanding	10,238,798	10,129,861
Dilutive effect of stock options (in shares)	4,228	4,513
Weighted average number of shares outstanding-diluted	10,243,026	10,134,374
Diluted earnings per common share (in dollars per share)	$ 0.55	$ 0.55

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	Mar. 31, 2016USD ($)
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 Li36

Commitments and Contingent Liabilities - Additional information (Detail)	3 Months Ended
	Mar. 31, 2016
Standby Letters of Credit [Member]
Commitment And Contingencies [Line Items]
Standby letters of credit term, or less	2 years

Commitments and Contingent Li37

Commitments and Contingent Liabilities - Total Contractual Amount for All Off-Balance Sheet Commitments (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Contractual amount for off-balance sheet commitments	$ 34,607
Commitments to Extend Credit [Member]
Loss Contingencies [Line Items]
Contractual amount for off-balance sheet commitments	$ 396,060

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	$ 308,359	$ 331,128
US Government-Sponsored Enterprises (GSEs) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	53,572	76,909
State and Municipal Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	32,615	31,270
Fair Value Measurements Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	308,359	331,128
Loans held for sale	6,236	10,135
Other assets	27,006	26,672
Total assets at fair value	341,601	367,935
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	308,359	331,128
Loans held for sale	6,236	10,135
Other assets	0	0
Total assets at fair value	314,595	341,263
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	27,006	26,672
Total assets at fair value	27,006	26,672
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	53,572	76,909
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	53,572	76,909
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	192,358	191,915
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	192,358	191,915
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	29,814	31,034
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	29,814	31,034
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	32,615	31,270
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	32,615	31,270
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 - Ass39

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	$ 5,565	$ 5,410
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	5,565	5,410
Impaired loans, net	7,090	8,436
Total	12,655	13,846
Fair Value, Measurements, Nonrecurring [Member] | Reported Value Measurement [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	5,565	5,410
Impaired loans, net	7,090	8,436
Total	$ 12,655	$ 13,846

Fair Value Measurements - Ass40

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Narrative (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Valuation allowance	$ 183	$ 194
Reported Value Measurement [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Valuation allowance	$ 183	$ 194

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value Due to Observable Factors (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Other Assets	$ 26,672	$ 17,331
Total realized gains included in income, Other Assets	124	$ 392
Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held, Other Assets	0
Purchases, issuances and settlements, net, Other Assets	210	$ 7,402
Transfers out of Level 3, Other Assets	0	0
Fair value, Other Assets	27,006	25,125
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	124	392
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	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held-to-maturity, Carrying/Notional Amount	$ 29,962	$ 28,195
Loans, net, Carrying/Notional Amount	1,528,010	1,443,179
Deposits and securities sold under agreements to repurchase, Carrying/Notional Amount	1,828,819	1,791,885
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	30,232	28,365
Loans, net, Estimated Fair Value	1,532,293	1,443,738
Deposits and securities sold under agreements to repurchase, Estimated Fair Value	1,605,048	1,549,414
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	30,232	28,365
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	1,532,293	1,443,738
Deposits and securities sold under agreements to repurchase, Estimated Fair Value	1,605,048	1,549,414
Commitments to extend credit, Estimated Fair Value	0	0
Standby letters of credit, Estimated Fair Value	$ 0	$ 0

Stock Option Plan, Equity Inc43

Stock Option Plan, Equity Incentive Plan & Charter Amendment - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2016	May. 10, 2016	Apr. 12, 2016	Dec. 31, 2015	Apr. 14, 2009	Apr. 30, 1999
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized number of capital stock (in shares)	15,000,000
Common stock, shares authorized	15,000,000			15,000,000
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)					75,000
Options available for grant (in shares)	48,700
2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	0
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized number of capital stock (in shares)		50,000,000
Common stock, shares authorized		50,000,000
Organizational stock, shares authorized		100
Subsequent Event [Member] | 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