Wilson Bank Holding (WBHC) 10-Q 9 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 09, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	WBHC
Entity Registrant Name	WILSON BANK HOLDING CO
Entity Central Index Key	0000885275
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		10,724,395

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Loans	$ 2,051,090	$ 2,043,179
Less: Allowance for loan losses	(28,280)	(27,174)
Net loans	2,022,810	2,016,005
Securities:
Available-for-sale, at market (amortized cost $385,194 and $295,683, respectively)	378,144	285,252
Total securities	378,144	285,252
Loans held for sale	11,881	7,484
Interest bearing deposits	112,106	80,215
Restricted equity securities	3,406	3,012
Federal funds sold	0	9,000
Total earning assets	2,528,347	2,400,968
Cash and due from banks	9,462	9,976
Bank premises and equipment, net	58,226	58,363
Accrued interest receivable	7,114	6,724
Deferred income tax asset	8,092	8,901
Other real estate	1,175	1,357
Bank owned life insurance	31,151	30,952
Other assets	24,161	21,636
Goodwill	4,805	4,805
Total assets	2,672,533	2,543,682
Liabilities and Stockholders’ Equity
Deposits	2,315,509	2,235,655
Federal home loan bank advances	32,000	0
Accrued interest and other liabilities	19,483	12,360
Total liabilities	2,366,992	2,248,015
Stockholders’ equity:
Common stock, $2.00 par value; authorized 50,000,000 shares, issued and outstanding 10,724,060 and 10,623,810 shares, respectively	21,448	21,248
Additional paid-in capital	78,716	73,960
Retained earnings	210,584	208,164
Net unrealized losses on available-for-sale securities, net of income taxes of $1,843 and $2,726, respectively	(5,207)	(7,705)
Total stockholders’ equity	305,541	295,667
Total liabilities and stockholders’ equity	$ 2,672,533	$ 2,543,682

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held-to-maturity, market value	$ 0	$ 0
Available-for-sale, amortized cost	$ 385,194	$ 295,683
Common stock, par value (in dollars per share)	$ 2	$ 2
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	10,724,060	10,623,810
Common stock, shares, outstanding (in shares)	10,724,060	10,623,810
Net unrealized losses on available-for-sale securities, income taxes	$ 1,843	$ 2,726

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest income:
Interest and fees on loans	$ 25,774	$ 21,833
Interest and dividends on securities:
Taxable securities	1,607	1,666
Exempt from Federal income taxes	167	303
Interest on loans held for sale	78	39
Interest on Federal funds sold	8	154
Interest on balances held at depository institutions	600	67
Interest and dividends on restricted securities	50	32
Total interest income	28,284	24,094
Interest expense:
Interest on negotiable order of withdrawal accounts	572	344
Interest on money market and savings accounts	1,740	707
Interest on time deposits	2,886	1,592
Interest on federal home loan bank advances	13	0
Interest on securities sold under repurchase agreements	0	16
Total interest expense	5,211	2,659
Net interest income before provision for loan losses	23,073	21,435
Provision for loan losses	1,033	1,023
Net interest income after provision for loan losses	22,040	20,412
Non-interest income:
Service charges on deposit accounts	1,663	1,542
Other fees and commissions	3,107	3,003
Income on BOLI and annuity contracts	199	214
Gain on sale of loans	1,646	1,031
Gain (loss) on the sale of fixed assets	(1)	0
Gain (loss) on sale of other real estate	(45)	0
Loss on sale of securities	(309)	0
Total non-interest income	6,260	5,790
Non-interest expense:
Salaries and employee benefits	10,410	9,823
Occupancy expenses, net	1,114	963
Advertising & public relations expense	477	482
Furniture and equipment expense	772	585
Data processing expense	834	710
ATM & interchange expense	784	684
Directors’ fees	134	149
Audit, legal & consulting expenses	495	521
Other operating expenses	2,398	2,132
Total non-interest expense	17,418	16,049
Earnings before income taxes	10,882	10,153
Income taxes	2,592	2,673
Net earnings	$ 8,290	$ 7,480
Weighted average number of common shares outstanding-basic (in shares)	10,701,602	10,507,273
Weighted average number of common shares outstanding-diluted (in shares)	10,716,872	10,513,076
Basic earnings per common share (in dollars per share)	$ 0.77	$ 0.71
Diluted earnings per common share (in dollars per share)	0.77	0.71
Dividends per share (in dollars per share)	$ 0.55	$ 0.35

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings for the year	$ 8,290	$ 7,480
Other comprehensive earnings (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities arising during period, net of taxes of $802 and $1,687, respectively	2,270	(4,766)
Reclassification adjustment for net losses on the sale of securities included in net earnings, net of taxes of $81 and $0, respectively	228	0
Other comprehensive earnings (loss)	2,498	(4,766)
Comprehensive earnings	$ 10,788	$ 2,714

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Earnings (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on available-for-sale securities arising during period, net of taxes	$ 802	$ (1,687)
Reclassification adjustment for net gains included in net earnings, taxes	$ 81	$ 0

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Net Unrealized Gain (Loss) On Available-For-Sale Securities
Beginning balance at Dec. 31, 2017	$ 267,730	$ 20,901	$ 66,047	$ 185,017	$ (4,235)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared, per share	(3,658)			(3,658)
Issuance of shares of stock pursuant to dividend reinvestment plan	2,902	130	2,772
Issuance of shares of stock pursuant to exercise of stock options	235	14	221
Share based compensation expense	100		100
Net change in fair value of available-for-sale securities during the year, net of taxes	(4,766)				(4,766)
Net earnings for the year	7,480			7,480
Ending balance at Mar. 31, 2018	270,023	21,045	69,140	188,839	(9,001)
Beginning balance at Dec. 31, 2018	295,667	21,248	73,960	208,164	(7,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared, per share	(5,843)			(5,843)
Issuance of shares of stock pursuant to dividend reinvestment plan	4,551	183	4,368
Issuance of shares of stock pursuant to exercise of stock options	306	17	289
Share based compensation expense	99		99
Net change in fair value of available-for-sale securities during the year, net of taxes	2,498				2,498
Net earnings for the year	8,290			8,290
Ending balance at Mar. 31, 2019	$ 305,541	$ 21,448	$ 78,716	$ 210,584	$ (5,207)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per shares (in dollars per share)	$ 0.55	$ 0.35
Shares of stock pursuant to dividend reinvestment plan (in shares)	91,487	64,837
Shares of stock pursuant to exercise of stock options (in shares)	8,763	6,729
Net change in fair value of available-for-sale securities, tax	$ 883	$ (1,687)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Interest received	$ 28,297	$ 24,710
Fees and commissions received	4,770	4,545
Proceeds from sale of loans held for sale	35,664	28,865
Origination of loans held for sale	(38,415)	(28,478)
Interest paid	(4,903)	(2,562)
Cash paid to suppliers and employees	(13,708)	(11,926)
Income taxes paid	(1,036)	(974)
Net cash provided by operating activities	10,669	14,180
Cash flows from investing activities:
Proceeds from maturities, calls, and principal payments of held-to-maturity securities	0	928
Proceeds from maturities, calls, and principal payments of available-for-sale securities	7,532	10,210
Proceeds from the sale of available-for-sale securities	24,621	0
Purchase of available-for-sale securities	(122,376)	(9,118)
Loans made to customers, net of repayments	(7,979)	(76,653)
Purchase of equity securities	(394)	0
Purchase of premises and equipment	(842)	(3,750)
Proceeds from sale of other real estate	276	15
Proceeds from sale of other assets	2	0
Net cash used in investing activities	(99,160)	(78,368)
Cash flows from financing activities:
Net increase in non-interest bearing, savings and NOW deposit accounts	42,024	52,874
Net increase in time deposits	37,830	24,615
Net decrease in securities sold under repurchase agreements	0	(864)
Federal Home Loan Bank advances	32,000	0
Dividends paid	(5,843)	(3,658)
Proceeds from sale of common stock pursuant to dividend reinvestment	4,551	2,902
Proceeds from exercise of stock options	306	235
Net cash provided by financing activities	110,868	76,104
Net increase in cash and cash equivalents	22,377	11,916
Cash and cash equivalents at beginning of period	99,191	95,518
Cash and cash equivalents at end of period	121,568	107,434
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings for the year	8,290	7,480
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation, amortization, and accretion	1,381	1,389
Provision for loan losses	1,033	1,023
Loss on sale of other real estate	45	0
Loss on sale of securities	309	0
Stock-based compensation expense	99	100
Loss on the sale of bank premises and equipment	1	0
Increase in loans held for sale	(4,397)	(644)
Increase in deferred tax asset	(74)	(74)
Increase in other assets, bank owned life insurance and annuity contract earnings, net	(124)	(7)
Increase in interest receivable	(390)	(37)
Increase in other liabilities	2,558	3,080
Increase in taxes payable	1,630	1,773
Increase in interest payable	308	97
Total adjustments	2,379	6,700
Net cash provided by operating activities	10,669	14,180
Supplemental schedule of non-cash activities:
Unrealized gain (loss) in value of securities available-for-sale, net of taxes of $883 and $1,687 for the three months ended March 31, 2019 and 2018, respectively	2,498	(4,766)
Non-cash transfers from loans to other real estate	139	0
Non-cash transfers from loans to other assets	$ 2	$ 0

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
Unrealized gain (loss) in values of securities available-for-sale, net of tax expense (benefit)	$ 883	$ (1,687)

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
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, Smith, and Williamson Counties, Tennessee. Basis of Presentation — The accompanying unaudited, consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated audited financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 . These consolidated financial statements include the accounts of the Company and the Bank. 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 goodwill or other 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, 2018 . 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, 2018 . 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, 2018 and March 31, 2019 , 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 one or more of a variety of techniques, which include a review of the borrower’s financial condition, debt-service coverage ratios, global cash flow analysis, guarantor support, other loan file information, meetings with borrowers, inspection or reappraisal of collateral and/or consultation with legal counsel as well as results of reviews of other similar industry credits (e.g. builder loans, development loans, church loans, etc). Loans with an identified weakness and principal balance of $500,000 or more are subject to individual identification for impairment. Individually identified impaired loans are measured based on the present value of expected payments using the loan’s original effective rate as the discount rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a specific valuation allowance is established as a component of the allowance for loan losses or, in the case of collateral dependent loans, the excess may be charged off. Changes to the valuation allowance are recorded as a component of the provision for loan losses. Any subsequent adjustments to present value calculations for impaired loan valuations as a result of the passage of time, such as changes in the anticipated payback period for repayment, are recorded as a component of the provision for loan losses. For loans with principal balances of 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, FASB issued ASU 2016-02, “Leases (Topic 842).” ASU 2016-02, among other things, requires lessees to recognize a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, certain changes were made to align, where necessary, lessor accounting with the lessee accounting model and ASC Topic 606, “Revenue from Contracts with Customers .” ASU 2016-02 was effective for us on January 1, 2019 and initially required transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. In July 2018, the FASB issued ASU 2018-11, “Leases (Topic 842) - Targeted Improvements,” which, among other things, provides an additional transition method that allows entities to not apply the guidance in ASU 2016-02 in the comparative periods presented in the financial statements and instead recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. In December 2018, the FASB also issued ASU 2018-20, “Leases (Topic 842) - Narrow-Scope Improvements for Lessors,” which provides for certain policy elections and changes lessor accounting for sales and similar taxes and certain lessor costs. Upon adoption of ASU 2016-02, ASU 2018-11 and ASU 2018-20 on January 1, 2019, we recorded a right-of-use asset in the amount of $2,600,000 and an offsetting lease liability in the amount of $2,627,000 . Upon adoption, using a modified retrospective transition adoption approach, we recognized a cumulative effect reduction to retained earnings totaling $27,000 . We have elected to apply certain practical expedients provided under ASU 2016-02 whereby we will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for any existing leases. We have utilized the modified-retrospective transition approach prescribed by ASU 2018-11. In June 2016, FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on held-to-maturity debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective on January 1, 2020. We are currently evaluating the potential impact of ASU 2016-13 on our financial statements. We are also evaluating the sufficiency of current systems and data needed to comply with this ASU. While we are currently unable to reasonably estimate the impact of adopting ASU 2016-13, we expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date. In January 2017, FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment.” ASU 2017-04 eliminates Step 2 from the goodwill impairment test which required entities to compute the implied fair value of goodwill. Under ASU 2017-04, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. ASU 2017-04 will be effective for us on January 1, 2020, with early adoption permitted for interim or annual impairment tests beginning in 2017. ASU 2017-04 is not expected to have a significant impact on our financial statements. In March 2017, FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 provides guidance on the amortization period for certain purchased callable debt securities held at a premium. This update shortens the amortization period for the premium to the earliest call date. Under current generally accepted accounting principles, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument related to certain cash flow issues. ASU 2017-08 became effective for us on January 1, 2019 and did not have a significant impact on our financial statements. In August 2018, FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820) - Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement." ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820. The amendments in this update remove disclosures that no longer are considered cost beneficial, modify/clarify the specific requirements of certain disclosures, and add disclosure requirements identified as relevant. ASU 2018-13 will be effective for us on January 1, 2020, with early adoption permitted, and is not expected to have a significant impact on our financial statements. Other than those previously discussed, there were no other recently issued accounting pronouncements that we believe are reasonably likely to materially impact the Company. Subsequent Events - Accounting Standards Codification (ASC) Topic 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. Wilson Bank Holding Company evaluated all events or transactions that occurred after March 31, 2019

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2019
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, 2019 and December 31, 2018 : (In Thousands) March 31, December 31, Mortgage loans on real estate: Residential 1-4 family $ 458,304 $ 460,692 Multifamily 136,385 134,613 Commercial 727,394 701,055 Construction and land development 495,061 518,245 Farmland 23,438 24,071 Second mortgages 11,465 11,197 Equity lines of credit 61,656 62,013 Total mortgage loans on real estate 1,913,703 1,911,886 Commercial loans 77,921 78,245 Agricultural loans 1,821 1,985 Consumer installment loans Personal 51,981 45,072 Credit cards 3,586 3,687 Total consumer installment loans 55,567 48,759 Other loans 8,989 9,324 Total loans before net deferred loan fees 2,058,001 2,050,199 Net deferred loan fees (6,911 ) (7,020 ) Total loans 2,051,090 2,043,179 Less: Allowance for loan losses (28,280 ) (27,174 ) Net loans $ 2,022,810 $ 2,016,005 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") ratios, minimum credit scores, and maximum debt to income ratios. 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 ratios, minimum credit scores, and maximum debt to income ratios. 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, if any. The cash flows of borrowers, however, may not be as expected and any collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and usually incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Consumer: The consumer loan portfolio segment includes non-real estate secured direct loans to consumers for household, family, and other personal expenditures. Consumer loans may be secured or unsecured and are usually structured with short or medium term maturities. These loans are underwritten and approved based on a number of consumer credit quality criteria including limits on maximum LTV ratios on secured consumer loans, minimum credit scores, and maximum debt to income ratios. 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. three months ended March 31, 2019 and year ended December 31, 2018 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, 2019 Allowance for loan losses: Beginning balance $ 6,297 1,481 9,753 7,084 221 118 731 622 867 27,174 Provision 261 19 510 (259 ) (5 ) 3 (4 ) 163 345 1,033 Charge-offs — — — — — — — — (296 ) (296 ) Recoveries 7 — — 267 — — — — 95 369 Ending balance $ 6,565 1,500 10,263 7,092 216 121 727 785 1,011 28,280 Ending balance individually evaluated for impairment $ 845 — 142 — — — — — — 987 Ending balance collectively evaluated for impairment $ 5,720 1,500 10,121 7,092 216 121 727 785 1,011 27,293 Loans: Ending balance $ 458,304 136,385 727,394 495,061 23,438 11,465 61,656 77,921 66,377 2,058,001 Ending balance individually evaluated for impairment $ 2,802 — 1,826 — — — — — — 4,628 Ending balance collectively evaluated for impairment $ 455,502 136,385 725,568 495,061 23,438 11,465 61,656 77,921 66,377 2,053,373 Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total December 31, 2018 Allowance for loan losses: Beginning balance $ 5,156 1,011 9,267 6,094 487 94 723 401 676 23,909 Provision 1,568 470 436 921 (266 ) 24 7 218 920 4,298 Charge-offs (492 ) — — (19 ) — — — — (1,152 ) (1,663 ) Recoveries 65 — 50 88 — — 1 3 423 630 Ending balance $ 6,297 1,481 9,753 7,084 221 118 731 622 867 27,174 Ending balance individually evaluated for impairment $ 852 — 312 — — — — — — 1,164 Ending balance collectively evaluated for impairment $ 5,445 1,481 9,441 7,084 221 118 731 622 867 26,010 Loans: Ending balance $ 460,692 134,613 701,055 518,245 24,071 11,197 62,013 78,245 60,068 2,050,199 Ending balance individually evaluated for impairment $ 2,829 — 1,831 686 — — — — — 5,346 Ending balance collectively evaluated for impairment $ 457,863 134,613 699,224 517,559 24,071 11,197 62,013 78,245 60,068 2,044,853 At each of March 31, 2019 and December 31, 2018 , the Company had certain impaired loans of $ 2.1 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, 2019 and December 31, 2018 . In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized March 31, 2019 With no related allowance recorded: Residential 1-4 family $ 1,089 1,464 — 1,143 2 Multifamily — — — — — Commercial real estate 314 314 — 316 4 Construction — — — 345 — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 1,403 1,778 — 1,804 6 With related allowance recorded: Residential 1-4 family $ 1,722 1,939 845 1,682 23 Multifamily — — — — — Commercial real estate 1,514 1,512 142 1,515 4 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 3,236 3,451 987 3,197 27 Total Residential 1-4 family $ 2,811 3,403 845 2,825 25 Multifamily — — — — — Commercial real estate 1,828 1,826 142 1,831 8 Construction — — — 345 — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 4,639 5,229 987 5,001 33 In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized December 31, 2018 With no related allowance recorded: Residential 1-4 family $ 1,196 1,795 — 1,862 42 Multifamily — — — — — Commercial real estate 317 316 — 320 16 Construction 690 686 — 822 42 Farmland — — — 233 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 2,203 2,797 — 3,237 100 With related allowance recorded: Residential 1-4 family $ 1,641 1,635 852 1,782 77 Multifamily — — — — — Commercial real estate 1,515 1,515 312 2,001 17 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 3,156 3,150 1,164 3,783 94 Total: Residential 1-4 family $ 2,837 3,430 852 3,644 119 Multifamily — — — — — Commercial real estate 1,832 1,831 312 2,321 33 Construction 690 686 — 822 42 Farmland — — — 233 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 5,359 5,947 1,164 7,020 194 Impaired loans also include loans that the Bank 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 Bank may otherwise incur. These loans are classified as impaired loans and, if on non-accruing status as of the date of restructuring, the loans are included in the nonperforming loan balances. Not included in nonperforming loans are loans that have been restructured that were performing as of the restructure date. Troubled Debt Restructuring The Bank’s loan portfolio includes certain loans that have been modified in a troubled debt restructuring ("TDR"), where economic or other concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties. These concessions typically result from the Bank’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months. The following table summarizes the carrying balances of TDRs at March 31, 2019 and December 31, 2018 . March 31, 2019 December 31, 2018 (In thousands) Performing TDRs $ 1,207 $ 1,676 Nonperforming TDRs 626 816 Total TDRS $ 1,833 $ 2,492 The following table outlines the amount of each troubled debt restructuring categorized by loan classification for the three months ended March 31, 2019 and the year ended December 31, 2018 (in thousands, except for number of contracts): March 31, 2019 December 31, 2018 Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Residential 1-4 family — $ — $ — 4 $ 448 $ 448 Multifamily — — — — — — Commercial real estate — — — — — — Construction — — — — — — Farmland — — — — — — Second mortgages — — — — — — Equity lines of credit — — — — — — Commercial — — — — — — Agricultural, installment and other — — — 2 5 5 Total — $ — $ — 6 $ 453 $ 453 As of March 31, 2019 and December 31, 2018 the Company had no loan relationships that had been previously classified as TDRs 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, 2019 and December 31, 2018 , the Company’s recorded investment in consumer mortgage loans in the process of foreclosure amounted to $637,000 and $200,000 , respectively. Potential problem loans, which include nonperforming loans, amounted to approximately $12.5 million at March 31, 2019 and $12.0 million at December 31, 2018 . 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 the Bank's 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. • March 31, 2019 and December 31, 2018 : (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, 2019 Credit Risk Profile by Internally Assigned Rating Pass $ 449,694 136,385 724,493 494,949 23,265 11,149 61,488 77,883 66,214 2,045,520 Special Mention 4,279 — 1,690 57 111 177 — 15 116 6,445 Substandard 4,331 — 1,211 55 62 139 168 23 47 6,036 Doubtful — — — — — — — — — — Total $ 458,304 136,385 727,394 495,061 23,438 11,465 61,656 77,921 66,377 2,058,001 December 31, 2018 Credit Risk Profile by Internally Assigned Rating Pass $ 452,411 134,613 698,083 518,123 23,895 10,979 61,927 78,206 59,923 2,038,160 Special Mention 3,949 — 1,690 64 112 179 — 39 78 6,111 Substandard 4,332 — 1,282 58 64 39 86 — 67 5,928 Doubtful — — — — — — — — — — Total $ 460,692 134,613 701,055 518,245 24,071 11,197 62,013 78,245 60,068 2,050,199

Debt and Equity Securities

Debt and Equity Securities	3 Months Ended
	Mar. 31, 2019
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, 2019 and December 31, 2018 are summarized as follows: March 31, 2019 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs) $ 69,172 $ — $ 1,821 $ 67,351 Mortgage-backed securities 258,540 100 3,784 254,856 Asset-backed securities 20,027 — 616 19,411 Obligations of states and political subdivisions 37,455 44 973 36,526 $ 385,194 $ 144 $ 7,194 $ 378,144 December 31, 2018 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs) $ 71,446 $ — $ 2,979 $ 68,467 Mortgage-backed securities 152,375 9 4,874 147,510 Asset-backed securities 22,534 10 844 21,700 Obligations of states and political subdivisions 49,328 22 1,775 47,575 $ 295,683 $ 41 $ 10,472 $ 285,252 There were no debt and equity securities classified as held-to-maturity at March 31, 2019 or December 31, 2018 . During the year ended December 31, 2018 , the Company sold securities classified as held-to-maturity with a book value of $4,843,000 for a loss of $79,000 . Due to the sale, management determined the Company no longer had the intent to hold the remaining securities classified as held-to-maturity to their respective maturity dates and transferred the remaining book value of $22,800,000 to the available-for-sale classification. Included in mortgage-backed securities are collateralized mortgage obligations totaling $40,113,000 (fair value of $39,851,000 ) and $11,564,000 (fair value of $11,295,000 ) at March 31, 2019 and December 31, 2018 , respectively. The amortized cost and estimated market value of debt securities at March 31, 2019 , 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. Available-For-Sale In Thousands Amortized Cost Estimated Market Value Due in one year or less $ 1,448 $ 1,448 Due after one year through five years 20,361 19,970 Due after five years through ten years 119,415 116,182 Due after ten years 243,970 240,544 $ 385,194 $ 378,144 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, 2019 and December 31, 2018 . In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total March 31, 2019 Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Available-for-Sale Securities: GSEs $ — $ — — $ 67,351 $ 1,821 26 $ 67,351 $ 1,821 Mortgage-backed securities 90,484 512 24 131,585 3,272 89 222,069 3,784 Asset-backed securities — — — 19,411 616 14 19,411 616 Obligations of states and political subdivisions 1,681 6 2 27,430 967 65 29,111 973 $ 92,165 $ 518 26 $ 245,777 $ 6,676 194 $ 337,942 $ 7,194 In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total December 31, 2018 Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Available-for-Sale Securities: GSEs $ — $ — — $ 68,467 $ 2,979 28 $ 68,467 $ 2,979 Mortgage-backed securities 8,651 64 10 137,457 4,810 94 146,108 4,874 Asset-backed securities — — — 20,597 844 14 20,597 844 Obligations of states and political subdivisions 4,064 26 6 39,841 1,749 94 43,905 1,775 $ 12,715 $ 90 16 $ 266,362 $ 10,382 230 $ 279,077 $ 10,472 Unrealized losses on securities have not been recognized into income because the Company does not consider these securities to be other-than-temporarily impaired at March 31, 2019 , as the issuers’ securities are of high credit quality, management does not intend to sell the securities and it is not more likely than not that management will be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely due to changes in interest rates and other market conditions. The issuers continue to make timely principal and interest payment on the securities. The fair value is expected to recover as the securities approach maturity.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
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, if any. The computation of diluted earnings per share for the Company begins with the basic earnings per share and includes 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, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (Dollars in Thousands Except Share and Per Share Amounts) Basic EPS Computation: Numerator – Earnings available to common stockholders $ 8,290 $ 7,480 Denominator – Weighted average number of common shares outstanding 10,701,602 10,507,273 Basic earnings per common share $ 0.77 $ 0.71 Diluted EPS Computation: Numerator – Earnings available to common stockholders $ 8,290 $ 7,480 Denominator – Weighted average number of common shares outstanding 10,701,602 10,507,273 Dilutive effect of stock options 15,270 5,803 Weighted average diluted common shares outstanding 10,716,872 10,513,076 Diluted earnings per common share $ 0.77 $ 0.71

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
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, 2019 , 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, 2019 . As of and for the three months ended March 31, 2019 , the Company has not accrued or recognized interest or 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 the Bank 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, 2015 through 2018 and the IRS for the years ended December 31, 2016 through 2018

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2019
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 (the Bank's customer) to a specifically named beneficiary and are the result of a particular business arrangement that exists between the applicant and the beneficiary. Standby letters of credit have fixed expiration dates and are usually for terms of two years or less unless terminated sooner due to criteria specified in the standby letter of credit. A typical arrangement involves the applicant routinely being indebted to the beneficiary for such items as inventory purchases, insurance, utilities, lease guarantees or other third party commercial transactions. The standby letter of credit would permit the beneficiary to obtain payment from the Bank under certain prescribed circumstances. Subsequently, the Bank would then seek reimbursement from the applicant pursuant to the terms of the standby letter of credit. The Bank follows the same credit policies and underwriting practices when making these commitments as it does for on-balance sheet instruments. Each customer’s creditworthiness is evaluated on a case-by-case basis, and the amount of collateral obtained, if any, is based on management’s credit evaluation of the customer. Collateral held varies but may include cash and cash equivalents, 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, 2019 is as follows: Commitments to extend credit $ 552,439,000 Standby letters of credit $ 81,493,000 The Bank 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. Traditionally these sales have been 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. In the fourth quarter of 2018, the Bank began to participate in a mandatory delivery program that requires the Bank to deliver a particular volume of mortgage loans by agreed upon dates. To the extent the Bank is unable to generate loans in sufficient volumes to meet its mandatory delivery requirements it may incur expenses in connection with such failures. 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 Bank 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 Bank 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, 2019

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
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. Bank Owned Life Insurance — The cash surrender value of bank owned life insurance policies is carried at fair value. The Company uses financial information received from insurance carriers indicating the performance of the insurance policies and cash surrender values in determining the carrying value of life insurance. 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 to be materially sensitive to changes in these unobservable inputs. Mortgage loans held-for-sale — Mortgage loans held-for-sale are carried at fair value, and are classified within Level 2 of the valuation hierarchy. The fair value of mortgage loans held-for-sale is determined using quoted prices for similar assets, adjusted for specific attributes of that loan. Derivatives —The fair values of derivatives are based on valuation models using observable market data as of the measurement date (Level 2). The following tables present the financial instruments carried at fair value as of March 31, 2019 and December 31, 2018 , by caption on the consolidated balance sheet and by FASB ASC 820 valuation hierarchy (as described above): Assets and Liabilities Measured at Fair Value on a Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) March 31, 2019 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 67,351 — 67,351 — Mortgage-backed securities 254,856 — 254,856 — Asset-backed securities 19,411 — 19,411 — State and municipal securities 36,526 — 36,526 — Total investment securities available-for-sale 378,144 — 378,144 — Mortgage loans held for sale 11,881 — 11,881 — Mortgage banking derivatives 440 — 440 — Bank owned life insurance 31,151 — — 31,151 Total assets $ 421,616 — 390,465 31,151 Mortgage banking derivatives $ 70 — 70 — Total liabilities $ 70 — 70 — December 31, 2018 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 68,467 — 68,467 — Mortgage-backed securities 147,510 — 147,510 — Asset-backed securities 21,700 — 21,700 — State and municipal securities 47,575 — 47,575 — Total investment securities available-for-sale 285,252 — 285,252 — Mortgage loans held for sale 7,484 — 7,484 — Mortgage banking derivatives 335 — 335 — Bank owned life insurance 30,952 — — 30,952 Total assets $ 324,023 — 293,071 30,952 Mortgage banking derivatives $ 88 — 88 — Total liabilities $ 88 — 88 — Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) March 31, 2019 Other real estate owned $ 1,175 — — 1,175 Impaired loans, net (¹) 3,652 — — 3,652 Total $ 4,827 — — 4,827 December 31, 2018 Other real estate owned $ 1,357 — — 1,357 Impaired loans, net (¹) 4,195 — — 4,195 Total $ 5,552 — — 5,552 (1) Amount is net of a valuation allowance of $987,000 at March 31, 2019 and $1,164,000 at December 31, 2018 as required by ASC 310, “Receivables.” The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at March 31, 2019 and December 31, 2018 : Valuation Techniques ( 2 ) Significant Unobservable Inputs Range (Weighted Average) Impaired loans Appraisal Estimated costs to sell 10% Other real estate owned Appraisal Estimated costs to sell 10% ( 2 ) The fair value is generally determined through independent appraisals of the underlying collateral, which may include Level 3 inputs that are not identifiable, or by using the discounted cash flow method if the loan is not collateral dependent. In the case of its investment securities 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, 2019 , 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, 2019 and 2018 (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, 2019 2018 Other Assets Other Liabilities Other Assets Other Liabilities Fair value, January 1 $ 30,952 — $ 29,475 — Total realized gains included in income 199 — 214 — Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at March 31 — — — — Purchases, issuances and settlements, net — — — — Transfers out of Level 3 — — — — Fair value, March 31 $ 31,151 — $ 29,689 — Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at March 31 $ 199 — $ 214 — 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, 2019 and December 31, 2018 . 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. Cash and cash equivalents — The carrying amounts of cash and short-term instruments approximate fair values and are classified as Level 1. 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 Federal Home Loan Bank borrowings — Fair values for deposits and Federal Home Loan Bank borrowings are estimated using discounted cash flow models, using current market interest rates offered on deposits with similar remaining maturities. Restricted equity securities — It is not practical to determine the fair value of Federal Home Loan Bank or Federal Reserve Bank stock due to restrictions placed on its transferability. Accrued interest receivable/payable — The carrying amounts of accrued interest approximate fair value resulting in a Level 1, Level 2 or Level 3 classification based on the asset/liability with which they are associated. 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, 2019 and December 31, 2018 . 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, 2019 Financial assets: Cash and cash equivalents $ 121,568 121,568 121,568 — — Loans, net 2,022,810 2,011,417 — — 2,011,417 Restricted equity securities 3,406 NA NA NA NA Accrued interest receivable 7,114 7,114 20 1,591 5,503 Financial liabilities: Deposits 2,315,509 2,097,729 — — 2,097,729 Federal Home Loan Bank borrowings 32,000 32,017 — — 32,017 Accrued interest payable 3,440 3,440 — — 3,440 December 31, 2018 Financial assets: Cash and cash equivalents $ 99,191 99,191 99,191 — — Loans, net 2,016,005 2,017,272 — — 2,017,272 Restricted equity securities 3,012 NA NA NA NA Accrued interest receivable 6,724 6,724 3 1,362 5,359 Financial liabilities: Deposits 2,235,655 1,974,554 — — 1,974,554 Accrued interest payable 3,132 3,132 — — 3,132 (1)

Equity Incentive Plans

Equity Incentive Plans	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plans	Equity Incentive Plans In April 1999, the stockholders of the Company approved the Wilson Bank Holding Company 1999 Stock Option Plan (the “1999 Stock Option Plan”). The Stock Option Plan provided for the granting of stock options, and authorized the issuance of common stock upon the exercise of such options, for up to 200,000 shares of common stock, to officers and other key employees of the Company and its subsidiary. Furthermore, the Company and its subsidiary could reserve additional shares for issuance under the 1999 Stock Option Plan as needed in order that the aggregate number of shares that may be issued during the term of the 1999 Stock Option Plan was equal to five percent ( 5% ) of the shares of common stock then issued and outstanding. The 1999 Stock Option Plan terminated on April 13, 2009 , and no additional awards may be issued under the 1999 Stock Option Plan. The awards granted under the 1999 Stock Option Plan prior to the plan's termination will remain outstanding until exercised or otherwise terminated. As of March 31, 2019 , the Company had no outstanding options under the 1999 Stock Option Plan. 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. Under the 2009 Stock Option Plan, awards may be in the form of options to acquire common stock of the Company. Subject to adjustment as provided by the terms of the 2009 Stock Option Plan, the maximum number of shares of common stock with respect to which awards may be granted under the 2009 Stock Option Plan is 100,000 shares. As of March 31, 2019 , the Company had outstanding 25,166 options with a weighted average exercise price of $31.90 . The 2009 Stock Option Plan expired on April 13, 2019, and no additional awards may be issued under the 2009 Stock Option Plan. The awards granted under the 2009 Stock Option Plan prior to the plan's expiration will remain outstanding until exercised or otherwise terminated. During the second quarter of 2016, the Company’s shareholders approved the Wilson Bank Holding Company 2016 Equity Incentive Plan, which authorizes awards of up to 750,000 shares of common stock. The 2016 Equity Incentive Plan was approved by the Board of Directors and effective as of January 25, 2016 and approved by the Company’s shareholders on April 12, 2016. On September 26, 2016, the Board of Directors approved an amendment and restatement of the 2016 Equity Incentive Plan (as amended and restated the “2016 Equity Incentive Plan”) to make clear that directors who are not also employees of the Company may be awarded stock appreciation rights. The primary purpose of the 2016 Equity Incentive Plan is to promote the interest 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, 2019 , the Company had 485,104 shares remaining available for issuance under the 2016 Equity Incentive Plan. As of March 31, 2019 , the Company had outstanding 123,493 options with a weighted average exercise price of $41.28 and 120,148 cash-settled stock appreciation rights with a weighted average exercise price of $41.00 under the 2016 Stock Option Plan. As of March 31, 2019 , the Company had outstanding 148,659 stock options with a weighted average exercise price of $39.69 and 120,148 cash-settled stock appreciation rights each with a weighted average exercise price of $41.00 . The following tables summarize information about stock options and cash-settled SARs for the three months ended March 31, 2019 and 2018 : March 31, 2019 March 31, 2018 Shares Weighted Shares Weighted Options and SARs outstanding at beginning of period 277,820 $ 40.11 $ 285,780 $ 39.31 Granted — — 2,500 44.75 Exercised 9,013 35.13 7,234 35.30 Forfeited or expired — — 1,500 36.60 Outstanding at end of period 268,807 $ 40.28 $ 279,546 $ 39.48 Options and SARs exercisable at March 31 109,897 $ 39.44 $ 59,378 $ 37.77 As of March 31, 2019 , there was $1,838,000 of total unrecognized cost related to non-vested share-based compensation arrangements granted under the Company's equity incentive plans. The cost is expected to be recognized over a weighted-average period of 2.98

Mortgage Banking Derivatives

Mortgage Banking Derivatives	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Mortgage Banking Derivatives	Mortgage Banking Derivatives Commitments to fund certain mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of mortgage loans to third party investors under the Bank's mandatory delivery program are considered derivatives. It is the Company's practice to enter into forward commitments for the future delivery of residential mortgage loans when interest rate lock commitments are entered into in order to economically hedge the effect of changes in interest rates resulting from its commitments to fund the loans. At March 31, 2019 and December 31, 2018 , the Company had approximately $11,631,000 and $9,655,000 , respectively, of interest rate lock commitments and approximately $12,000,000 and $11,750,000 , respectively, of forward commitments for the future delivery of residential mortgage loans. The fair value of these mortgage banking derivatives was reflected by derivative assets of $440,000 and $335,000 and derivative liabilities of $70,000 and $88,000 , respectively, at March 31, 2019 and December 31, 2018 . Changes in the fair values of these mortgage-banking derivatives are included in net gains on sale of loans. The net gains (losses) relating to free-standing derivative instruments used for risk management is summarized below (in thousands): In Thousands March 31, 2019 December 31, 2018 Forward contracts related to mortgage loans held for sale and interest rate contracts $ (70 ) (88 ) Interest rate contracts for customers 440 335 The following table reflects the amount and fair value of mortgage banking derivatives included in the consolidated balance sheet as of March 31, 2019 and December 31, 2018 (in thousands): In Thousands March 31, 2019 December 31, 2018 Notional Amount Fair Value Notional Amount Fair Value Included in other assets (liabilities): Interest rate contracts for customers $ 11,631 440 9,655 335 Forward contracts related to mortgage loans held-for-sale 12,000 (70 ) 11,750 (88 )

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
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, Smith, and Williamson Counties, Tennessee.
Basis of Presentation	Basis of Presentation — The accompanying unaudited, consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated audited financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 .
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 goodwill or other 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, 2018 . 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, 2018
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, 2018 and March 31, 2019 , 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 one or more of a variety of techniques, which include a review of the borrower’s financial condition, debt-service coverage ratios, global cash flow analysis, guarantor support, other loan file information, meetings with borrowers, inspection or reappraisal of collateral and/or consultation with legal counsel as well as results of reviews of other similar industry credits (e.g. builder loans, development loans, church loans, etc). Loans with an identified weakness and principal balance of $500,000 or more are subject to individual identification for impairment. Individually identified impaired loans are measured based on the present value of expected payments using the loan’s original effective rate as the discount rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a specific valuation allowance is established as a component of the allowance for loan losses or, in the case of collateral dependent loans, the excess may be charged off. Changes to the valuation allowance are recorded as a component of the provision for loan losses. Any subsequent adjustments to present value calculations for impaired loan valuations as a result of the passage of time, such as changes in the anticipated payback period for repayment, are recorded as a component of the provision for loan losses. For loans with principal balances of less than $500,000
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.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016, FASB issued ASU 2016-02, “Leases (Topic 842).” ASU 2016-02, among other things, requires lessees to recognize a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, certain changes were made to align, where necessary, lessor accounting with the lessee accounting model and ASC Topic 606, “Revenue from Contracts with Customers .” ASU 2016-02 was effective for us on January 1, 2019 and initially required transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. In July 2018, the FASB issued ASU 2018-11, “Leases (Topic 842) - Targeted Improvements,” which, among other things, provides an additional transition method that allows entities to not apply the guidance in ASU 2016-02 in the comparative periods presented in the financial statements and instead recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. In December 2018, the FASB also issued ASU 2018-20, “Leases (Topic 842) - Narrow-Scope Improvements for Lessors,” which provides for certain policy elections and changes lessor accounting for sales and similar taxes and certain lessor costs. Upon adoption of ASU 2016-02, ASU 2018-11 and ASU 2018-20 on January 1, 2019, we recorded a right-of-use asset in the amount of $2,600,000 and an offsetting lease liability in the amount of $2,627,000 . Upon adoption, using a modified retrospective transition adoption approach, we recognized a cumulative effect reduction to retained earnings totaling $27,000 . We have elected to apply certain practical expedients provided under ASU 2016-02 whereby we will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for any existing leases. We have utilized the modified-retrospective transition approach prescribed by ASU 2018-11. In June 2016, FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on held-to-maturity debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective on January 1, 2020. We are currently evaluating the potential impact of ASU 2016-13 on our financial statements. We are also evaluating the sufficiency of current systems and data needed to comply with this ASU. While we are currently unable to reasonably estimate the impact of adopting ASU 2016-13, we expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date. In January 2017, FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment.” ASU 2017-04 eliminates Step 2 from the goodwill impairment test which required entities to compute the implied fair value of goodwill. Under ASU 2017-04, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. ASU 2017-04 will be effective for us on January 1, 2020, with early adoption permitted for interim or annual impairment tests beginning in 2017. ASU 2017-04 is not expected to have a significant impact on our financial statements. In March 2017, FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 provides guidance on the amortization period for certain purchased callable debt securities held at a premium. This update shortens the amortization period for the premium to the earliest call date. Under current generally accepted accounting principles, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument related to certain cash flow issues. ASU 2017-08 became effective for us on January 1, 2019 and did not have a significant impact on our financial statements. In August 2018, FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820) - Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement." ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820. The amendments in this update remove disclosures that no longer are considered cost beneficial, modify/clarify the specific requirements of certain disclosures, and add disclosure requirements identified as relevant. ASU 2018-13 will be effective for us on January 1, 2020, with early adoption permitted, and is not expected to have a significant impact on our financial statements.
Subsequent Events	Subsequent Events - Accounting Standards Codification (ASC) Topic 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. Wilson Bank Holding Company evaluated all events or transactions that occurred after March 31, 2019
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, 2019 , 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, 2019
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

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule of Details on Loans of Company	The following schedule details the loans of the Company at March 31, 2019 and December 31, 2018 : (In Thousands) March 31, December 31, Mortgage loans on real estate: Residential 1-4 family $ 458,304 $ 460,692 Multifamily 136,385 134,613 Commercial 727,394 701,055 Construction and land development 495,061 518,245 Farmland 23,438 24,071 Second mortgages 11,465 11,197 Equity lines of credit 61,656 62,013 Total mortgage loans on real estate 1,913,703 1,911,886 Commercial loans 77,921 78,245 Agricultural loans 1,821 1,985 Consumer installment loans Personal 51,981 45,072 Credit cards 3,586 3,687 Total consumer installment loans 55,567 48,759 Other loans 8,989 9,324 Total loans before net deferred loan fees 2,058,001 2,050,199 Net deferred loan fees (6,911 ) (7,020 ) Total loans 2,051,090 2,043,179 Less: Allowance for loan losses (28,280 ) (27,174 ) Net loans $ 2,022,810 $ 2,016,005
Transactions in Allowance for Loan Losses	Transactions in the allowance for loan losses for the three months ended March 31, 2019 and year ended December 31, 2018 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, 2019 Allowance for loan losses: Beginning balance $ 6,297 1,481 9,753 7,084 221 118 731 622 867 27,174 Provision 261 19 510 (259 ) (5 ) 3 (4 ) 163 345 1,033 Charge-offs — — — — — — — — (296 ) (296 ) Recoveries 7 — — 267 — — — — 95 369 Ending balance $ 6,565 1,500 10,263 7,092 216 121 727 785 1,011 28,280 Ending balance individually evaluated for impairment $ 845 — 142 — — — — — — 987 Ending balance collectively evaluated for impairment $ 5,720 1,500 10,121 7,092 216 121 727 785 1,011 27,293 Loans: Ending balance $ 458,304 136,385 727,394 495,061 23,438 11,465 61,656 77,921 66,377 2,058,001 Ending balance individually evaluated for impairment $ 2,802 — 1,826 — — — — — — 4,628 Ending balance collectively evaluated for impairment $ 455,502 136,385 725,568 495,061 23,438 11,465 61,656 77,921 66,377 2,053,373 Residential 1-4 Family Multifamily Commercial Real Estate Construction Farmland Second Mortgages Equity Lines of Credit Commercial Agricultural, Installment and Other Total December 31, 2018 Allowance for loan losses: Beginning balance $ 5,156 1,011 9,267 6,094 487 94 723 401 676 23,909 Provision 1,568 470 436 921 (266 ) 24 7 218 920 4,298 Charge-offs (492 ) — — (19 ) — — — — (1,152 ) (1,663 ) Recoveries 65 — 50 88 — — 1 3 423 630 Ending balance $ 6,297 1,481 9,753 7,084 221 118 731 622 867 27,174 Ending balance individually evaluated for impairment $ 852 — 312 — — — — — — 1,164 Ending balance collectively evaluated for impairment $ 5,445 1,481 9,441 7,084 221 118 731 622 867 26,010 Loans: Ending balance $ 460,692 134,613 701,055 518,245 24,071 11,197 62,013 78,245 60,068 2,050,199 Ending balance individually evaluated for impairment $ 2,829 — 1,831 686 — — — — — 5,346 Ending balance collectively evaluated for impairment $ 457,863 134,613 699,224 517,559 24,071 11,197 62,013 78,245 60,068 2,044,853
Company's Impaired Loans	The following table presents the Company’s impaired loans at March 31, 2019 and December 31, 2018 . In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized March 31, 2019 With no related allowance recorded: Residential 1-4 family $ 1,089 1,464 — 1,143 2 Multifamily — — — — — Commercial real estate 314 314 — 316 4 Construction — — — 345 — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 1,403 1,778 — 1,804 6 With related allowance recorded: Residential 1-4 family $ 1,722 1,939 845 1,682 23 Multifamily — — — — — Commercial real estate 1,514 1,512 142 1,515 4 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 3,236 3,451 987 3,197 27 Total Residential 1-4 family $ 2,811 3,403 845 2,825 25 Multifamily — — — — — Commercial real estate 1,828 1,826 142 1,831 8 Construction — — — 345 — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 4,639 5,229 987 5,001 33 In Thousands Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized December 31, 2018 With no related allowance recorded: Residential 1-4 family $ 1,196 1,795 — 1,862 42 Multifamily — — — — — Commercial real estate 317 316 — 320 16 Construction 690 686 — 822 42 Farmland — — — 233 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 2,203 2,797 — 3,237 100 With related allowance recorded: Residential 1-4 family $ 1,641 1,635 852 1,782 77 Multifamily — — — — — Commercial real estate 1,515 1,515 312 2,001 17 Construction — — — — — Farmland — — — — — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 3,156 3,150 1,164 3,783 94 Total: Residential 1-4 family $ 2,837 3,430 852 3,644 119 Multifamily — — — — — Commercial real estate 1,832 1,831 312 2,321 33 Construction 690 686 — 822 42 Farmland — — — 233 — Second mortgages — — — — — Equity lines of credit — — — — — Commercial — — — — — Agricultural, installment and other — — — — — $ 5,359 5,947 1,164 7,020 194
Summary of Carrying Balances of TDR's	summarizes the carrying balances of TDRs at March 31, 2019 and December 31, 2018 . March 31, 2019 December 31, 2018 (In thousands) Performing TDRs $ 1,207 $ 1,676 Nonperforming TDRs 626 816 Total TDRS $ 1,833 $ 2,492
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, 2019 and the year ended December 31, 2018 (in thousands, except for number of contracts): March 31, 2019 December 31, 2018 Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Number of Contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, Net of Related Allowance Residential 1-4 family — $ — $ — 4 $ 448 $ 448 Multifamily — — — — — — Commercial real estate — — — — — — Construction — — — — — — Farmland — — — — — — Second mortgages — — — — — — Equity lines of credit — — — — — — Commercial — — — — — — Agricultural, installment and other — — — 2 5 5 Total — $ — $ — 6 $ 453 $ 453
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, 2019 and December 31, 2018 : (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, 2019 Credit Risk Profile by Internally Assigned Rating Pass $ 449,694 136,385 724,493 494,949 23,265 11,149 61,488 77,883 66,214 2,045,520 Special Mention 4,279 — 1,690 57 111 177 — 15 116 6,445 Substandard 4,331 — 1,211 55 62 139 168 23 47 6,036 Doubtful — — — — — — — — — — Total $ 458,304 136,385 727,394 495,061 23,438 11,465 61,656 77,921 66,377 2,058,001 December 31, 2018 Credit Risk Profile by Internally Assigned Rating Pass $ 452,411 134,613 698,083 518,123 23,895 10,979 61,927 78,206 59,923 2,038,160 Special Mention 3,949 — 1,690 64 112 179 — 39 78 6,111 Substandard 4,332 — 1,282 58 64 39 86 — 67 5,928 Doubtful — — — — — — — — — — Total $ 460,692 134,613 701,055 518,245 24,071 11,197 62,013 78,245 60,068 2,050,199

Debt and Equity Securities (Tab

Debt and Equity Securities (Tables)	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Debt and Equity Securities	Debt and equity securities at March 31, 2019 and December 31, 2018 are summarized as follows: March 31, 2019 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs) $ 69,172 $ — $ 1,821 $ 67,351 Mortgage-backed securities 258,540 100 3,784 254,856 Asset-backed securities 20,027 — 616 19,411 Obligations of states and political subdivisions 37,455 44 973 36,526 $ 385,194 $ 144 $ 7,194 $ 378,144 December 31, 2018 Securities Available-For-Sale In Thousands Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value U.S. Government-sponsored enterprises (GSEs) $ 71,446 $ — $ 2,979 $ 68,467 Mortgage-backed securities 152,375 9 4,874 147,510 Asset-backed securities 22,534 10 844 21,700 Obligations of states and political subdivisions 49,328 22 1,775 47,575 $ 295,683 $ 41 $ 10,472 $ 285,252 There were no debt and equity securities classified as held-to-maturity at March 31, 2019 or December 31, 2018 . During the year ended December 31, 2018 , the Company sold securities classified as held-to-maturity with a book value of $4,843,000 for a loss of $79,000 . Due to the sale, management determined the Company no longer had the intent to hold the remaining securities classified as held-to-maturity to their respective maturity dates and transferred the remaining book value of $22,800,000 to the available-for-sale classification. Included in mortgage-backed securities are collateralized mortgage obligations totaling $40,113,000 (fair value of $39,851,000 ) and $11,564,000 (fair value of $11,295,000 ) at March 31, 2019 and December 31, 2018 , respectively.
Maturity of Amortized Cost and Estimated Market Value of Debt Securities	The amortized cost and estimated market value of debt securities at March 31, 2019 , 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. Available-For-Sale In Thousands Amortized Cost Estimated Market Value Due in one year or less $ 1,448 $ 1,448 Due after one year through five years 20,361 19,970 Due after five years through ten years 119,415 116,182 Due after ten years 243,970 240,544 $ 385,194 $ 378,144
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, 2019 and December 31, 2018 . In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total March 31, 2019 Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Available-for-Sale Securities: GSEs $ — $ — — $ 67,351 $ 1,821 26 $ 67,351 $ 1,821 Mortgage-backed securities 90,484 512 24 131,585 3,272 89 222,069 3,784 Asset-backed securities — — — 19,411 616 14 19,411 616 Obligations of states and political subdivisions 1,681 6 2 27,430 967 65 29,111 973 $ 92,165 $ 518 26 $ 245,777 $ 6,676 194 $ 337,942 $ 7,194 In Thousands, Except Number of Securities Less than 12 Months 12 Months or More Total December 31, 2018 Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Number of Securities Included Fair Value Unrealized Losses Available-for-Sale Securities: GSEs $ — $ — — $ 68,467 $ 2,979 28 $ 68,467 $ 2,979 Mortgage-backed securities 8,651 64 10 137,457 4,810 94 146,108 4,874 Asset-backed securities — — — 20,597 844 14 20,597 844 Obligations of states and political subdivisions 4,064 26 6 39,841 1,749 94 43,905 1,775 $ 12,715 $ 90 16 $ 266,362 $ 10,382 230 $ 279,077 $ 10,472

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
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, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (Dollars in Thousands Except Share and Per Share Amounts) Basic EPS Computation: Numerator – Earnings available to common stockholders $ 8,290 $ 7,480 Denominator – Weighted average number of common shares outstanding 10,701,602 10,507,273 Basic earnings per common share $ 0.77 $ 0.71 Diluted EPS Computation: Numerator – Earnings available to common stockholders $ 8,290 $ 7,480 Denominator – Weighted average number of common shares outstanding 10,701,602 10,507,273 Dilutive effect of stock options 15,270 5,803 Weighted average diluted common shares outstanding 10,716,872 10,513,076 Diluted earnings per common share $ 0.77 $ 0.71

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
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, 2019 is as follows: Commitments to extend credit $ 552,439,000 Standby letters of credit $ 81,493,000

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
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, 2019 and December 31, 2018 , by caption on the consolidated balance sheet and by FASB ASC 820 valuation hierarchy (as described above): Assets and Liabilities Measured at Fair Value on a Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) March 31, 2019 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 67,351 — 67,351 — Mortgage-backed securities 254,856 — 254,856 — Asset-backed securities 19,411 — 19,411 — State and municipal securities 36,526 — 36,526 — Total investment securities available-for-sale 378,144 — 378,144 — Mortgage loans held for sale 11,881 — 11,881 — Mortgage banking derivatives 440 — 440 — Bank owned life insurance 31,151 — — 31,151 Total assets $ 421,616 — 390,465 31,151 Mortgage banking derivatives $ 70 — 70 — Total liabilities $ 70 — 70 — December 31, 2018 Investment securities available-for-sale: U.S. Government sponsored enterprises $ 68,467 — 68,467 — Mortgage-backed securities 147,510 — 147,510 — Asset-backed securities 21,700 — 21,700 — State and municipal securities 47,575 — 47,575 — Total investment securities available-for-sale 285,252 — 285,252 — Mortgage loans held for sale 7,484 — 7,484 — Mortgage banking derivatives 335 — 335 — Bank owned life insurance 30,952 — — 30,952 Total assets $ 324,023 — 293,071 30,952 Mortgage banking derivatives $ 88 — 88 — Total liabilities $ 88 — 88 —
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis	Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (In Thousands) Total Carrying Value in the Consolidated Balance Sheet Quoted Market Prices in an Active Market (Level 1) Models with Significant Observable Market Parameters (Level 2) Models with Significant Unobservable Market Parameters (Level 3) March 31, 2019 Other real estate owned $ 1,175 — — 1,175 Impaired loans, net (¹) 3,652 — — 3,652 Total $ 4,827 — — 4,827 December 31, 2018 Other real estate owned $ 1,357 — — 1,357 Impaired loans, net (¹) 4,195 — — 4,195 Total $ 5,552 — — 5,552 (1) Amount is net of a valuation allowance of $987,000 at March 31, 2019 and $1,164,000 at December 31, 2018
Additional Quantitative Information	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at March 31, 2019 and December 31, 2018 : Valuation Techniques ( 2 ) Significant Unobservable Inputs Range (Weighted Average) Impaired loans Appraisal Estimated costs to sell 10% Other real estate owned Appraisal Estimated costs to sell 10% ( 2 )
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, 2019 and 2018 (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, 2019 2018 Other Assets Other Liabilities Other Assets Other Liabilities Fair value, January 1 $ 30,952 — $ 29,475 — Total realized gains included in income 199 — 214 — Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at March 31 — — — — Purchases, issuances and settlements, net — — — — Transfers out of Level 3 — — — — Fair value, March 31 $ 31,151 — $ 29,689 — Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at March 31 $ 199 — $ 214 —
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, 2019 and December 31, 2018 . 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, 2019 Financial assets: Cash and cash equivalents $ 121,568 121,568 121,568 — — Loans, net 2,022,810 2,011,417 — — 2,011,417 Restricted equity securities 3,406 NA NA NA NA Accrued interest receivable 7,114 7,114 20 1,591 5,503 Financial liabilities: Deposits 2,315,509 2,097,729 — — 2,097,729 Federal Home Loan Bank borrowings 32,000 32,017 — — 32,017 Accrued interest payable 3,440 3,440 — — 3,440 December 31, 2018 Financial assets: Cash and cash equivalents $ 99,191 99,191 99,191 — — Loans, net 2,016,005 2,017,272 — — 2,017,272 Restricted equity securities 3,012 NA NA NA NA Accrued interest receivable 6,724 6,724 3 1,362 5,359 Financial liabilities: Deposits 2,235,655 1,974,554 — — 1,974,554 Accrued interest payable 3,132 3,132 — — 3,132 (1)

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity	The following tables summarize information about stock options and cash-settled SARs for the three months ended March 31, 2019 and 2018 : March 31, 2019 March 31, 2018 Shares Weighted Shares Weighted Options and SARs outstanding at beginning of period 277,820 $ 40.11 $ 285,780 $ 39.31 Granted — — 2,500 44.75 Exercised 9,013 35.13 7,234 35.30 Forfeited or expired — — 1,500 36.60 Outstanding at end of period 268,807 $ 40.28 $ 279,546 $ 39.48 Options and SARs exercisable at March 31 109,897 $ 39.44 $ 59,378 $ 37.77

Mortgage Banking Derivatives (T

Mortgage Banking Derivatives (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss)	The net gains (losses) relating to free-standing derivative instruments used for risk management is summarized below (in thousands): In Thousands March 31, 2019 December 31, 2018 Forward contracts related to mortgage loans held for sale and interest rate contracts $ (70 ) (88 ) Interest rate contracts for customers 440 335
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table reflects the amount and fair value of mortgage banking derivatives included in the consolidated balance sheet as of March 31, 2019 and December 31, 2018 (in thousands): In Thousands March 31, 2019 December 31, 2018 Notional Amount Fair Value Notional Amount Fair Value Included in other assets (liabilities): Interest rate contracts for customers $ 11,631 440 9,655 335 Forward contracts related to mortgage loans held-for-sale 12,000 (70 ) 11,750 (88 )

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Minimum past due of loans for nonaccrual status	90 days
Loans with identified weakness and principal balance	$ 500,000
Assignment of valuation allowance for specified amount of loan (less than)	$ 500,000
Right-of-use asset		$ 2,600,000
Lease liability		2,627,000
Reclassification adjustment for the adoption of lease standard		(27,000)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification adjustment for the adoption of lease standard		$ (27,000)

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Schedule of Details on Loans of Company (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	$ 2,058,001	$ 2,050,199
Net deferred loan fees	(6,911)	(7,020)
Total loans	2,051,090	2,043,179
Less: Allowance for loan losses	(28,280)	(27,174)	$ (23,909)
Net loans	2,022,810	2,016,005
Mortgage loans on real estate:
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	1,913,703	1,911,886
Mortgage loans on real estate: | Residential 1-4 family
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	458,304	460,692
Less: Allowance for loan losses	(6,565)	(6,297)	(5,156)
Mortgage loans on real estate: | Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	136,385	134,613
Less: Allowance for loan losses	(1,500)	(1,481)	(1,011)
Mortgage loans on real estate: | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	727,394	701,055
Less: Allowance for loan losses	(10,263)	(9,753)	(9,267)
Mortgage loans on real estate: | Construction and land development
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	495,061	518,245
Less: Allowance for loan losses	(7,092)	(7,084)	(6,094)
Mortgage loans on real estate: | Farmland
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	23,438	24,071
Less: Allowance for loan losses	(216)	(221)	(487)
Mortgage loans on real estate: | Second mortgages
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	11,465	11,197
Less: Allowance for loan losses	(121)	(118)	(94)
Mortgage loans on real estate: | Equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	61,656	62,013
Less: Allowance for loan losses	(727)	(731)	(723)
Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	77,921	78,245
Less: Allowance for loan losses	(785)	(622)	$ (401)
Agricultural loans
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	1,821	1,985
Consumer installment loans | Personal
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	51,981	45,072
Consumer installment loans | Credit cards
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	3,586	3,687
Consumer installment loans | Total consumer installment loans
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	55,567	48,759
Other loans
Loans and Leases Receivable Disclosure [Line Items]
Total loans before net deferred loan fees	$ 8,989	$ 9,324

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan
Financing Receivable, Recorded Investment [Line Items]
Threshold percentage of repayment derived from non-affiliated third party (as a percent)	50.00%
Impaired loans, net	$ 2,100	$ 2,100
Subsequent default, number of contracts | loan	0	0
Loans in process of foreclose	$ 637	$ 200
Residential 1-4 family
Financing Receivable, Recorded Investment [Line Items]
Amortization period, lower range	15 years
Amortization period, upper range	30 years
Maturity period, lower range	5 years
Maturity period, upper range	15 years
Nonperforming TDRs
Financing Receivable, Recorded Investment [Line Items]
Potential problem loans	$ 12,500	$ 12,000

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Transactions in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Allowance for loan losses:
Beginning balance	$ 27,174	$ 23,909
Provision	1,033	4,298
Charge-offs	(296)	(1,663)
Recoveries	369	630
Ending balance	28,280	27,174
Ending balance individually evaluated for impairment	987	1,164
Ending balance collectively evaluated for impairment	27,293	26,010
Loans:
Ending balance	2,058,001	2,050,199
Ending balance individually evaluated for impairment	4,628	5,346
Ending balance collectively evaluated for impairment	2,053,373	2,044,853
Mortgage loans on real estate:
Loans:
Ending balance	1,913,703	1,911,886
Mortgage loans on real estate: | Residential 1-4 family
Allowance for loan losses:
Beginning balance	6,297	5,156
Provision	261	1,568
Charge-offs	0	(492)
Recoveries	7	65
Ending balance	6,565	6,297
Ending balance individually evaluated for impairment	845	852
Ending balance collectively evaluated for impairment	5,720	5,445
Loans:
Ending balance	458,304	460,692
Ending balance individually evaluated for impairment	2,802	2,829
Ending balance collectively evaluated for impairment	455,502	457,863
Mortgage loans on real estate: | Multifamily
Allowance for loan losses:
Beginning balance	1,481	1,011
Provision	19	470
Charge-offs	0	0
Recoveries	0	0
Ending balance	1,500	1,481
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	1,500	1,481
Loans:
Ending balance	136,385	134,613
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	136,385	134,613
Mortgage loans on real estate: | Commercial
Allowance for loan losses:
Beginning balance	9,753	9,267
Provision	510	436
Charge-offs	0	0
Recoveries	0	50
Ending balance	10,263	9,753
Ending balance individually evaluated for impairment	142	312
Ending balance collectively evaluated for impairment	10,121	9,441
Loans:
Ending balance	727,394	701,055
Ending balance individually evaluated for impairment	1,826	1,831
Ending balance collectively evaluated for impairment	725,568	699,224
Mortgage loans on real estate: | Construction
Allowance for loan losses:
Beginning balance	7,084	6,094
Provision	(259)	921
Charge-offs	0	(19)
Recoveries	267	88
Ending balance	7,092	7,084
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	7,092	7,084
Loans:
Ending balance	495,061	518,245
Ending balance individually evaluated for impairment	0	686
Ending balance collectively evaluated for impairment	495,061	517,559
Mortgage loans on real estate: | Farmland
Allowance for loan losses:
Beginning balance	221	487
Provision	(5)	(266)
Charge-offs	0	0
Recoveries	0	0
Ending balance	216	221
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	216	221
Loans:
Ending balance	23,438	24,071
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	23,438	24,071
Mortgage loans on real estate: | Second mortgages
Allowance for loan losses:
Beginning balance	118	94
Provision	3	24
Charge-offs	0	0
Recoveries	0	0
Ending balance	121	118
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	121	118
Loans:
Ending balance	11,465	11,197
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	11,465	11,197
Mortgage loans on real estate: | Equity lines of credit
Allowance for loan losses:
Beginning balance	731	723
Provision	(4)	7
Charge-offs	0	0
Recoveries	0	1
Ending balance	727	731
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	727	731
Loans:
Ending balance	61,656	62,013
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	61,656	62,013
Commercial loans
Allowance for loan losses:
Beginning balance	622	401
Provision	163	218
Charge-offs	0	0
Recoveries	0	3
Ending balance	785	622
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	785	622
Loans:
Ending balance	77,921	78,245
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	77,921	78,245
Agricultural, Installment and Other
Allowance for loan losses:
Beginning balance	867	676
Provision	345	920
Charge-offs	(296)	(1,152)
Recoveries	95	423
Ending balance	1,011	867
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	1,011	867
Loans:
Ending balance	66,377	60,068
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	$ 66,377	$ 60,068

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Company's Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
With no related allowance recorded:
Recorded Investment	$ 1,403	$ 2,203
Unpaid Principal Balance	1,778	2,797
Average Recorded Investment	1,804	3,237
Interest Income Recognized	6	100
With related allowance recorded:
Recorded Investment	3,236	3,156
Unpaid Principal Balance	3,451	3,150
Related Allowance	987	1,164
Average Recorded Investment	3,197	3,783
Interest Income Recognized	27	94
Total
Recorded Investment	4,639	5,359
Unpaid Principal Balance	5,229	5,947
Average Recorded Investment	5,001	7,020
Interest Income Recognized	33	194
Real Estate Portfolio Segment | Residential 1-4 family
With no related allowance recorded:
Recorded Investment	1,089	1,196
Unpaid Principal Balance	1,464	1,795
Average Recorded Investment	1,143	1,862
Interest Income Recognized	2	42
With related allowance recorded:
Recorded Investment	1,722	1,641
Unpaid Principal Balance	1,939	1,635
Related Allowance	845	852
Average Recorded Investment	1,682	1,782
Interest Income Recognized	23	77
Total
Recorded Investment	2,811	2,837
Unpaid Principal Balance	3,403	3,430
Average Recorded Investment	2,825	3,644
Interest Income Recognized	25	119
Real Estate Portfolio Segment | Multifamily
With no related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Real Estate Portfolio Segment | Commercial
With no related allowance recorded:
Recorded Investment	314	317
Unpaid Principal Balance	314	316
Average Recorded Investment	316	320
Interest Income Recognized	4	16
With related allowance recorded:
Recorded Investment	1,514	1,515
Unpaid Principal Balance	1,512	1,515
Related Allowance	142	312
Average Recorded Investment	1,515	2,001
Interest Income Recognized	4	17
Total
Recorded Investment	1,828	1,832
Unpaid Principal Balance	1,826	1,831
Average Recorded Investment	1,831	2,321
Interest Income Recognized	8	33
Real Estate Portfolio Segment | Construction
With no related allowance recorded:
Recorded Investment	0	690
Unpaid Principal Balance	0	686
Average Recorded Investment	345	822
Interest Income Recognized	0	42
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	690
Unpaid Principal Balance	0	686
Average Recorded Investment	345	822
Interest Income Recognized	0	42
Real Estate Portfolio Segment | Farmland
With no related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	233
Interest Income Recognized	0	0
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	233
Interest Income Recognized	0	0
Real Estate Portfolio Segment | Second mortgages
With no related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Real Estate Portfolio Segment | Equity lines of credit
With no related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial
With no related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Agricultural, installment and other
With no related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
With related allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	$ 0	$ 0

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Summary of Carrying Balances of TDR's (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Modifications [Line Items]
Total TDRS	$ 1,833	$ 2,492
Performing TDRs
Financing Receivable, Modifications [Line Items]
Total TDRS	1,207	1,676
Nonperforming TDRs
Financing Receivable, Modifications [Line Items]
Total TDRS	$ 626	$ 816

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Troubled Debt Restructuring Categorized by Loan (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	6
Pre Modification Outstanding Recorded Investment	$ 0	$ 453
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 453
Mortgage loans on real estate: | Residential 1-4 family
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	4
Pre Modification Outstanding Recorded Investment	$ 0	$ 448
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 448
Mortgage loans on real estate: | Multifamily
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
Mortgage loans on real estate: | Commercial
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
Mortgage loans on real estate: | Construction
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
Mortgage loans on real estate: | Farmland
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
Mortgage loans on real estate: | Second mortgages
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
Mortgage loans on real estate: | Equity lines of credit
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 loans
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
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	2
Pre Modification Outstanding Recorded Investment	$ 0	$ 5
Post Modification Outstanding Recorded Investment, Net of Related Allowance	$ 0	$ 5

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Summary of Loan Portfolio by Risk Rating (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	$ 2,058,001	$ 2,050,199
Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	2,045,520	2,038,160
Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	6,445	6,111
Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	6,036	5,928
Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate:
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	1,913,703	1,911,886
Mortgage loans on real estate: | Residential 1-4 family
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	458,304	460,692
Mortgage loans on real estate: | Residential 1-4 family | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	449,694	452,411
Mortgage loans on real estate: | Residential 1-4 family | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	4,279	3,949
Mortgage loans on real estate: | Residential 1-4 family | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	4,331	4,332
Mortgage loans on real estate: | Residential 1-4 family | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Multifamily
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	136,385	134,613
Mortgage loans on real estate: | Multifamily | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	136,385	134,613
Mortgage loans on real estate: | Multifamily | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Multifamily | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Multifamily | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Commercial
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	727,394	701,055
Mortgage loans on real estate: | Commercial | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	724,493	698,083
Mortgage loans on real estate: | Commercial | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	1,690	1,690
Mortgage loans on real estate: | Commercial | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	1,211	1,282
Mortgage loans on real estate: | Commercial | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Construction
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	495,061	518,245
Mortgage loans on real estate: | Construction | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	494,949	518,123
Mortgage loans on real estate: | Construction | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	57	64
Mortgage loans on real estate: | Construction | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	55	58
Mortgage loans on real estate: | Construction | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Farmland
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	23,438	24,071
Mortgage loans on real estate: | Farmland | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	23,265	23,895
Mortgage loans on real estate: | Farmland | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	111	112
Mortgage loans on real estate: | Farmland | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	62	64
Mortgage loans on real estate: | Farmland | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Second mortgages
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	11,465	11,197
Mortgage loans on real estate: | Second mortgages | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	11,149	10,979
Mortgage loans on real estate: | Second mortgages | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	177	179
Mortgage loans on real estate: | Second mortgages | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	139	39
Mortgage loans on real estate: | Second mortgages | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Equity lines of credit
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	61,656	62,013
Mortgage loans on real estate: | Equity lines of credit | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	61,488	61,927
Mortgage loans on real estate: | Equity lines of credit | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Mortgage loans on real estate: | Equity lines of credit | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	168	86
Mortgage loans on real estate: | Equity lines of credit | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Commercial loans
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	77,921	78,245
Commercial loans | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	77,883	78,206
Commercial loans | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	15	39
Commercial loans | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	23	0
Commercial loans | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	0	0
Agricultural, Installment and Other
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	66,377	60,068
Agricultural, Installment and Other | Pass
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	66,214	59,923
Agricultural, Installment and Other | Special Mention
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	116	78
Agricultural, Installment and Other | Substandard
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	47	67
Agricultural, Installment and Other | Doubtful
Credit Risk Profile by Internally Assigned Rating
Total loans before net deferred loan fees	$ 0	$ 0

Debt and Equity Securities - Su

Debt and Equity Securities - Summary of Debt and Equity Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Securities Available-For-Sale
Amortized Cost	$ 385,194	$ 295,683
Gross Unrealized Gains	144	41
Gross Unrealized Losses	7,194	10,472
Estimated Market Value	378,144	285,252
U.S. Government-sponsored enterprises (GSEs)
Securities Available-For-Sale
Amortized Cost	69,172	71,446
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,821	2,979
Estimated Market Value	67,351	68,467
Mortgage-backed securities
Securities Available-For-Sale
Amortized Cost	258,540	152,375
Gross Unrealized Gains	100	9
Gross Unrealized Losses	3,784	4,874
Estimated Market Value	254,856	147,510
Asset-backed securities
Securities Available-For-Sale
Amortized Cost	20,027	22,534
Gross Unrealized Gains	0	10
Gross Unrealized Losses	616	844
Estimated Market Value	19,411	21,700
Obligations of states and political subdivisions
Securities Available-For-Sale
Amortized Cost	37,455	49,328
Gross Unrealized Gains	44	22
Gross Unrealized Losses	973	1,775
Estimated Market Value	$ 36,526	$ 47,575

Debt and Equity Securities - Ad

Debt and Equity Securities - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Held-to-maturity, securities sold	$ 4,843
Loss realized on securities	(79)
Transfers, before tax	22,800
Available-for-sale, amortized cost	295,683	$ 385,194
Estimated Market Value	285,252	378,144
Collateralized Mortgage Obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, amortized cost	11,564,000	40,113,000
Estimated Market Value	$ 11,295,000	$ 39,851,000

Debt and Equity Securities - Ma

Debt and Equity Securities - Maturity of Amortized Cost and Estimated Market Value of Debt Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in one year or less	$ 1,448
Due after one year through five years	20,361
Due after five years through ten years	119,415
Due after ten years	243,970
Amortized Cost	385,194	$ 295,683
Estimated Market Value
Due in one year or less	1,448
Due after one year through five years	19,970
Due after five years through ten years	116,182
Due after ten years	240,544
Estimated Market Value	$ 378,144

Debt and Equity Securities - Gr

Debt and Equity Securities - Gross Unrealized Losses and Fair Value of Company's Investments (Detail) $ in Thousands	Mar. 31, 2019USD ($)security	Dec. 31, 2018USD ($)security
Less than 12 Months
Fair Value	$ 92,165	$ 12,715
Unrealized Losses	$ 518	$ 90
Number of Securities Included | security	26	16
12 Months or More
Fair Value	$ 245,777	$ 266,362
Unrealized Losses	$ 6,676	$ 10,382
Number of Securities Included | security	194	230
Total
Fair Value	$ 337,942	$ 279,077
Unrealized Losses	7,194	10,472
GSEs
Less than 12 Months
Fair Value	0	0
Unrealized Losses	$ 0	$ 0
Number of Securities Included | security	0	0
12 Months or More
Fair Value	$ 67,351	$ 68,467
Unrealized Losses	$ 1,821	$ 2,979
Number of Securities Included | security	26	28
Total
Fair Value	$ 67,351	$ 68,467
Unrealized Losses	1,821	2,979
Mortgage-backed securities
Less than 12 Months
Fair Value	90,484	8,651
Unrealized Losses	$ 512	$ 64
Number of Securities Included | security	24	10
12 Months or More
Fair Value	$ 131,585	$ 137,457
Unrealized Losses	$ 3,272	$ 4,810
Number of Securities Included | security	89	94
Total
Fair Value	$ 222,069	$ 146,108
Unrealized Losses	3,784	4,874
Asset-backed securities
Less than 12 Months
Fair Value	0	0
Unrealized Losses	$ 0	$ 0
Number of Securities Included | security	0	0
12 Months or More
Fair Value	$ 19,411	$ 20,597
Unrealized Losses	$ 616	$ 844
Number of Securities Included | security	14	14
Total
Fair Value	$ 19,411	$ 20,597
Unrealized Losses	616	844
Obligations of states and political subdivisions
Less than 12 Months
Fair Value	1,681	4,064
Unrealized Losses	$ 6	$ 26
Number of Securities Included | security	2	6
12 Months or More
Fair Value	$ 27,430	$ 39,841
Unrealized Losses	$ 967	$ 1,749
Number of Securities Included | security	65	94
Total
Fair Value	$ 29,111	$ 43,905
Unrealized Losses	$ 973	$ 1,775

Earnings Per Share (Detail)

Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic EPS Computation:
Numerator – Earnings available to common stockholders	$ 8,290	$ 7,480
Denominator – Weighted average number of common shares outstanding (in shares)	10,701,602	10,507,273
Basic earnings per common share (in dollars per share)	$ 0.77	$ 0.71
Diluted EPS Computation:
Numerator – Earnings available to common stockholders	$ 8,290	$ 7,480
Denominator – Weighted average number of common shares outstanding (in shares)	10,701,602	10,507,273
Dilutive effect of stock options (in shares)	15,270	5,803
Weighted average number of shares outstanding-diluted (in shares)	10,716,872	10,513,076
Diluted earnings per common share (in dollars per share)	$ 0.77	$ 0.71

Income Taxes (Detail)

Income Taxes (Detail)	Mar. 31, 2019USD ($)
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Additional information (Detail)	3 Months Ended
	Mar. 31, 2019
Standby letters of credit
Commitment And Contingencies [Line Items]
Standby letters of credit term, or less	2 years

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Total Contractual Amount for All Off-Balance Sheet Commitments (Detail) $ in Thousands	Mar. 31, 2019USD ($)
Standby letters of credit
Loss Contingencies [Line Items]
Contractual amount for off-balance sheet commitments	$ 81,493
Commitments to extend credit
Loss Contingencies [Line Items]
Contractual amount for off-balance sheet commitments	$ 552,439

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	$ 378,144	$ 285,252
Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	254,856	147,510
Asset-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	19,411	21,700
State and municipal securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	36,526	47,575
Reported Value Measurement | Fair Value Measurements Recurring
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	378,144	285,252
Mortgage loans held for sale	11,881	7,484
Mortgage Banking Derivatives, Assets, Fair Value Disclosure	440	335
Bank owned life insurance	31,151	30,952
Total assets	421,616	324,023
Mortgage Banking Derivatives, Liabilities, Fair Value Disclosure	70	88
Financial Liabilities Fair Value Disclosure	70	88
Reported Value Measurement | Fair Value Measurements Recurring | U.S. Government-sponsored enterprises (GSEs)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	67,351	68,467
Reported Value Measurement | Fair Value Measurements Recurring | Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	254,856	147,510
Reported Value Measurement | Fair Value Measurements Recurring | Asset-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	19,411	21,700
Reported Value Measurement | Fair Value Measurements Recurring | State and municipal securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	36,526	47,575
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Quoted Market Prices in an Active Market (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Mortgage loans held for sale	0	0
Mortgage Banking Derivatives, Assets, Fair Value Disclosure	0	0
Bank owned life insurance	0	0
Total assets	0	0
Mortgage Banking Derivatives, Liabilities, Fair Value Disclosure	0	0
Financial Liabilities Fair Value Disclosure	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Models with Significant Observable Market Parameters (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	378,144	285,252
Mortgage loans held for sale	11,881	7,484
Mortgage Banking Derivatives, Assets, Fair Value Disclosure	440	335
Bank owned life insurance	0	0
Total assets	390,465	293,071
Mortgage Banking Derivatives, Liabilities, Fair Value Disclosure	70	88
Financial Liabilities Fair Value Disclosure	70	88
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Mortgage loans held for sale	0	0
Mortgage Banking Derivatives, Assets, Fair Value Disclosure	0	0
Bank owned life insurance	31,151	30,952
Total assets	31,151	30,952
Mortgage Banking Derivatives, Liabilities, Fair Value Disclosure	0	0
Financial Liabilities Fair Value Disclosure	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | U.S. Government-sponsored enterprises (GSEs) | Quoted Market Prices in an Active Market (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | U.S. Government-sponsored enterprises (GSEs) | Models with Significant Observable Market Parameters (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	67,351	68,467
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | U.S. Government-sponsored enterprises (GSEs) | Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Mortgage-backed securities | Quoted Market Prices in an Active Market (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Mortgage-backed securities | Models with Significant Observable Market Parameters (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	254,856	147,510
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Mortgage-backed securities | Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Asset-backed securities | Quoted Market Prices in an Active Market (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Asset-backed securities | Models with Significant Observable Market Parameters (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	19,411	21,700
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | Asset-backed securities | Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | State and municipal securities | Quoted Market Prices in an Active Market (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | State and municipal securities | Models with Significant Observable Market Parameters (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	36,526	47,575
Estimate of Fair Value Measurement | Fair Value Measurements Recurring | State and municipal securities | Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total investment securities available-for-sale	$ 0	$ 0

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	$ 1,175	$ 1,357
Unpaid Principal Balance	3,451	3,150
Related Allowance	987	1,164
Fair Value, Measurements, Nonrecurring | Quoted Market Prices in an Active Market (Level 1)
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Unpaid Principal Balance	0	0
Total assets	0	0
Fair Value, Measurements, Nonrecurring | Models with Significant Observable Market Parameters (Level 2)
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Unpaid Principal Balance	0	0
Total assets	0	0
Fair Value, Measurements, Nonrecurring | Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	1,175	1,357
Unpaid Principal Balance	3,652	4,195
Total assets	4,827	5,552
Fair Value, Measurements, Nonrecurring | Total Carrying Value in the Consolidated Balance Sheet
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Other real estate owned	1,175	1,357
Unpaid Principal Balance	3,652	4,195
Total assets	4,827	5,552
Related Allowance	$ 987	$ 1,164

Fair Value Measurements - Addit

Fair Value Measurements - Additional Quantitative Information (Details) - Fair Value, Measurements, Nonrecurring - Models with Significant Unobservable Market Parameters (Level 3) - Weighted Average	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0.10
Other real estate owned	0.10

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value Due to Observable Factors (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Assets
Other Assets
Fair value, January 1	$ 30,952	$ 29,475
Total realized gains included in income	199	214
Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at March 31	0	0
Purchases, issuances and settlements, net	0	0
Transfers out of Level 3	0	0
Fair value, March 31	31,151	29,689
Other Liabilities
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at March 31	199	214
Other Liabilities
Other Liabilities
Fair value, January 1	0	0
Total realized gains included in income	0	0
Change in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at March 31	0	0
Purchases, issuances and settlements, net	0	0
Transfers out of Level 3	0	0
Fair value, March 31	0	0
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at March 31	$ 0	$ 0

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Restricted equity securities	$ 3,406	$ 3,012
Quoted Market Prices in an Active Market (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	121,568	99,191
Loans, net	0	0
Accrued interest receivable	20	3
Deposits	0	0
Federal Home Loan Bank borrowings	0
Accrued interest payable	0	0
Models with Significant Observable Market Parameters (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Loans, net	0	0
Accrued interest receivable	1,591	1,362
Deposits	0	0
Federal Home Loan Bank borrowings	0
Accrued interest payable	0	0
Models with Significant Unobservable Market Parameters (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Loans, net	2,011,417	2,017,272
Accrued interest receivable	5,503	5,359
Deposits	2,097,729	1,974,554
Federal Home Loan Bank borrowings	32,017
Accrued interest payable	3,440	3,132
Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	121,568	99,191
Loans, net	2,022,810	2,016,005
Restricted equity securities	3,406	3,012
Accrued interest receivable	7,114	6,724
Deposits	2,315,509	2,235,655
Federal Home Loan Bank borrowings	32,000
Accrued interest payable	3,440	3,132
Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	121,568	99,191
Loans, net	2,011,417	2,017,272
Accrued interest receivable	7,114	6,724
Deposits	2,097,729	1,974,554
Federal Home Loan Bank borrowings	32,017
Accrued interest payable	$ 3,440	$ 3,132

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Apr. 13, 2019	Apr. 13, 2009	Apr. 30, 1999	Mar. 31, 2019	Jun. 30, 2016	Apr. 30, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized, as a percentage of shares issued and outstanding			5.00%
Nonvested awards, unrecognized compensation cost				$ 1,838
Nonvested awards, unrecognized compensation cost recognition period				2 years 11 months 23 days
1999 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)			200,000
Number of additional shares authorized (in shares)		0
Options outstanding (in shares)				0
2009 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)						100,000
Options outstanding (in shares)				25,166
Options, outstanding, weighted average exercise price (in dollars per share)				$ 31.90
2016 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance (in shares)					750,000
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)				148,659
Options, outstanding, weighted average exercise price (in dollars per share)				$ 39.69
Options | 2016 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)				123,493
Options, outstanding, weighted average exercise price (in dollars per share)				$ 41.28
Options available for grant (in shares)				485,104
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted in period (in shares)				120,148
Weighted average price of grants in period (in dollars per share)				$ 41
Stock Appreciation Rights (SARs) | 2016 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted in period (in shares)				120,148
Weighted average price of grants in period (in dollars per share)				$ 41
Subsequent Event | 2009 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized (in shares)	0

Equity Incentive Plans - Summar

Equity Incentive Plans - Summary of Stock Option Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Shares
Exercised (in shares)	8,763	6,729
Employee Stock Options and Stock Appreciation Rights (SARs)
Shares
Options and SARs outstanding at beginning of year (in shares)	277,820	285,780
Granted (in shares)	0	2,500
Exercised (in shares)	9,013	7,234
Forfeited or expired (in shares)	0	1,500
Options and SARs outstanding at end of year (in shares)	268,807	279,546
Options and SARs exercisable at year end (in shares)	109,897	59,378
Weighted Average Exercise Price
Options and SARs outstanding at beginning of year (in dollars per share)	$ 40.11	$ 39.31
Granted (in dollars per share)	0	44.75
Exercised (in dollars per share)	35.13	35.30
Forfeited or expired (in dollars per share)	0	36.60
Options and SARs outstanding at end of year (in dollars per share)	40.28	39.48
Options and SARs exercisable at year end (in dollars per share)	$ 39.44	$ 37.77

Mortgage Banking Derivatives -

Mortgage Banking Derivatives - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Interest rate contracts for customers
Derivative [Line Items]
Notional Amount	$ 11,631	$ 9,655
Fair Value, Asset	440	335
Forward contracts related to mortgage loans held for sale and interest rate contracts
Derivative [Line Items]
Notional Amount	12,000	11,750
Fair Value, Liability	$ 70	$ 88

Mortgage Banking Derivatives _2

Mortgage Banking Derivatives - Net gains (losses) relating to free-standing derivative instruments (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2018
Forward contracts related to mortgage loans held for sale and interest rate contracts
Derivative [Line Items]
Gain (loss) on hedged item	$ (70)	$ (88)
Interest rate contracts for customers
Derivative [Line Items]
Gain (loss) on hedged item	$ 440	$ 335

Mortgage Banking Derivatives _3

Mortgage Banking Derivatives - Amount and fair value of mortgage banking derivatives (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Interest rate contracts for customers
Derivative [Line Items]
Notional Amount	$ 11,631	$ 9,655
Fair Value, Asset	440	335
Forward contracts related to mortgage loans held-for-sale
Derivative [Line Items]
Notional Amount	12,000	11,750
Fair Value, Liability	$ (70)	$ (88)