Farmers & Merchants Bancorp (FMAO) 10-K 28 Feb 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 24, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	FMAO
Entity Registrant Name	FARMERS & MERCHANTS BANCORP INC
Entity Central Index Key	792,966
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		9,265,980
Entity Public Float			$ 286,494,250

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks		$ 33,480	$ 27,348
Federal Funds Sold		987	974
Total cash and cash equivalents		34,467	28,322
Interest-bearing time deposits		4,018	1,915
Securities-available-for-sale		196,398	218,527
Other Securities, at cost		3,717	3,717
Loans held for sale		1,221	2,055
Loans, net		816,156	751,310
Premises and equipment		21,617	21,457
Construction in Progress		109
Goodwill		4,074	4,074
Mortgage Servicing Rights		2,299	2,192
Other Real Estate Owned		674	774
Bank Owned Life Insurance		14,523	14,376
Other assets		7,736	7,176
Total Assets		1,107,009	1,055,895
Deposits
Noninterest-bearing		199,114	186,390
Interest-bearing
NOW accounts		298,711	230,446
Savings		233,949	226,537
Time		187,566	198,830
Total deposits		919,340	842,203
Federal Funds Purchased and Securities sold under agreement to repurchase		39,495	70,324
Federal Home Loan Bank (FHLB) Advances		5,000	10,000
Dividend payable		1,193	1,053
Accrued expenses and other liabilities		7,844	6,738
Total liabilities		972,872	930,318
Commitments and Contingencies
Stockholders' Equity
Common shares No par value 20,000,000 shares authorized; issued & outstanding 10,400,000 shares 12/31/17 and 12/31/16	[1]	11,546	11,947
Treasury Stock -1,134,120 shares 12/31/17, 1,158,250 shares 12/31/16	[1]	(12,160)	(12,267)
Retained earnings		136,577	127,869
Accumulated other comprehensive loss		(1,826)	(1,972)
Total stockholders' equity		134,137	125,577
Total Liabilities and Stockholders' Equity		$ 1,107,009	$ 1,055,895
[1]	Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical)	Sep. 20, 2017$ / shares	Dec. 31, 2017$ / sharesshares	Dec. 31, 2016$ / sharesshares
Statement of Financial Position [Abstract]
Common stock, no par value | $ / shares
Common stock, shares authorized		20,000,000	20,000,000
Common stock, shares issued		10,400,000	10,400,000
Common stock, shares outstanding		10,400,000	10,400,000
Share stock split ratio	2
Treasury Stock, shares		1,134,120	1,158,250

Consolidated Statements of Inco

Consolidated Statements of Income & Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Income
Loans, including fees		$ 37,195	$ 33,703	$ 29,293
Debt securities:
U.S. Treasury and government agencies		2,480	2,373	2,434
Municipalities		1,193	1,437	1,739
Dividends		187	149	148
Federal funds sold		69	22	8
Other		124	43	28
Total interest income		41,248	37,727	33,650
Interest Expense
Deposits		4,483	3,617	3,269
Federal funds purchased and securities sold under agreements to repurchase		497	458	317
Borrowed funds		147	148	1
Total interest expense		5,127	4,223	3,587
Net Interest Income-Before provision for loan losses		36,121	33,504	30,063
Provision for Loan Losses		222	1,121	625
Net Interest Income After Provision For Loan Losses		35,899	32,383	29,438
Noninterest Income
Customer service fees		5,609	6,118	5,847
Other service charges and fees		4,268	3,774	3,790
Net gain on sale of loans		811	888	700
Net gain on sale of available-for-sale securities		47	588	451
Total noninterest income		10,735	11,368	10,788
Noninterest Expense
Salaries and Wages		12,613	11,620	10,907
Employee benefits		3,635	3,323	3,555
Net occupancy expense		1,489	1,459	1,352
Furniture and equipment		1,858	1,724	1,629
Data processing		1,213	1,409	1,300
Franchise taxes		902	878	746
Net loss on sale of other assets owned		27	81	47
FDIC Assessment		330	407	485
Mortgage servicing rights amortization		353	419	374
Other general and administrative		6,311	6,111	5,672
Total other operating expenses		28,731	27,431	26,067
Income Before Income Taxes		17,903	16,320	14,159
Income Taxes		5,183	4,656	3,819
Net Income		12,720	11,664	10,340
Other Comprehensive Income (Loss) (Net of Tax):
Net unrealized gain (loss) on available-for-sale securities		267	(2,721)	100
Reclassification adjustment for gain on sale of available-for-sale securities		(47)	(588)	(451)
Net unrealized gain (loss) on available-for-sale securities		220	(3,309)	(351)
Tax expense (benefit)		74	(1,125)	(119)
Other comprehensive income (loss)		146	(2,184)	(232)
Comprehensive Income		$ 12,866	$ 9,480	$ 10,108
Earnings Per Share-Basic and Diluted	[1]	$ 1.38	$ 1.27	$ 1.12
[1]	Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Consolidated Statements of Chan

Consolidated Statements of Changes to Stockholders Equity - USD ($) $ in Thousands		Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2014	[1]	$ 114,493	$ 12,222	$ (11,928)	$ 113,755	$ 444
Beginning balance, shares at Dec. 31, 2014	[1]		9,254,676
Net income		10,340			10,340
Other comprehensive income (loss)		(232)				(232)
Purchase of Treasury Stock		(803)		(803)
Purchase of Treasury Stock, shares			(61,370)
Issuance of 32,000, 32,300 and 32,000 shares of restricted stock (Net of Forfeitures - 200, 1,546 and 1,080) for the period ended 2015, 2016 and 2017 respectively, and Repurchases - 38 and 72 for the period ended 2015 and 2016, Amount		(30)	$ (450)	342	78
Issuance of 32,000, 32,300 and 32,000 shares of restricted stock (Net of Forfeitures - 200, 1,546 and 1,080) for the period ended 2015, 2016 and 2017 respectively, and Repurchases - 38 and 72 for the period ended 2015 and 2016, Shares			31,762
Stock-based compensation expense		314	$ 314
Cash dividends declared - 0.44, 0.46 and 0.50 per share for the period ended 2015, 2016 and 2017 respectively		(3,985)			(3,985)
Ending balance at Dec. 31, 2015		120,097	$ 12,086	(12,389)	120,188	212
Ending balance, shares at Dec. 31, 2015			9,225,068
Net income		11,664			11,664
Other comprehensive income (loss)		(2,184)				(2,184)
Purchase of Treasury Stock		(194)		(194)
Purchase of Treasury Stock, shares			(14,000)
Issuance of 32,000, 32,300 and 32,000 shares of restricted stock (Net of Forfeitures - 200, 1,546 and 1,080) for the period ended 2015, 2016 and 2017 respectively, and Repurchases - 38 and 72 for the period ended 2015 and 2016, Amount		(47)	$ (541)	316	178
Issuance of 32,000, 32,300 and 32,000 shares of restricted stock (Net of Forfeitures - 200, 1,546 and 1,080) for the period ended 2015, 2016 and 2017 respectively, and Repurchases - 38 and 72 for the period ended 2015 and 2016, Shares			30,682
Stock-based compensation expense		402	$ 402
Cash dividends declared - 0.44, 0.46 and 0.50 per share for the period ended 2015, 2016 and 2017 respectively		(4,161)			(4,161)
Ending balance at Dec. 31, 2016		125,577	$ 11,947	(12,267)	127,869	(1,972)
Ending balance, shares at Dec. 31, 2016			9,241,750
Net income		12,720			12,720
Other comprehensive income (loss)		146				146
Purchase of Treasury Stock		0
Purchase of Treasury Stock related to stock award		(196)		(196)
Purchase of Treasury Stock related to stock award, shares			(6,790)
Issuance of 32,000, 32,300 and 32,000 shares of restricted stock (Net of Forfeitures - 200, 1,546 and 1,080) for the period ended 2015, 2016 and 2017 respectively, and Repurchases - 38 and 72 for the period ended 2015 and 2016, Amount		(35)	$ (908)	303	570
Issuance of 32,000, 32,300 and 32,000 shares of restricted stock (Net of Forfeitures - 200, 1,546 and 1,080) for the period ended 2015, 2016 and 2017 respectively, and Repurchases - 38 and 72 for the period ended 2015 and 2016, Shares			30,920
Stock-based compensation expense		507	$ 507
Cash dividends declared - 0.44, 0.46 and 0.50 per share for the period ended 2015, 2016 and 2017 respectively		(4,582)			(4,582)
Ending balance at Dec. 31, 2017		$ 134,137	$ 11,546	$ (12,160)	$ 136,577	$ (1,826)
Ending balance, shares at Dec. 31, 2017			9,265,880
[1]	Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Consolidated Statements of Cha6

Consolidated Statements of Changes to Stockholders Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2017$ / sharesshares	Dec. 31, 2016$ / sharesshares	Dec. 31, 2015$ / sharesshares
Issuance of shares of restricted stock, Shares	32,000	32,300	32,000
Cash dividends declared, per share | $ / shares	$ 0.50	$ 0.46	$ 0.44
Common Stock [Member]
Issuance of shares of restricted stock, Shares	32,000	32,300	32,000
Issuance of shares of restricted stock, forfeitures	1,080	1,546	200
Issuance of shares of restricted stock, Repurchases		72	38

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities
Net income	$ 12,720	$ 11,664	$ 10,340
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	1,613	1,464	1,365
Amortization of available-for-sale securities, net	1,106	1,146	1,239
Amortization of servicing rights	353	419	374
Amortization of core deposit intangible	245	323	323
Compensation expense related to stock awards	507	402	314
Provision for loan loss	222	1,121	625
Gain on sale of loans held for sale	(811)	(888)	(700)
Originations of loans held for sale	(57,391)	(66,014)	(52,706)
Proceeds from sale of loans held for sale	59,520	63,988	52,764
Loss on sale of other assets owned	27	81	47
Gain on sales of available-for sale securities	(47)	(588)	(451)
Change in other assets and other liabilities, net	1,194	(688)	1,275
Net Cash Provided by Operating Activities	19,258	12,430	14,809
Activity in securities:
Maturities, prepayments and calls	23,064	41,825	26,059
Sales	13,562	85,723	47,029
Purchases	(15,335)	(114,819)	(60,925)
Change in interest-bearing time deposits	(2,103)	(1,915)
Proceeds from sales of other assets owned	21	41	64
Additions to premises and equipment	(1,794)	(2,406)	(1,716)
Loan originations and principal collections, net	(67,197)	(72,639)	(64,483)
Net cash used in investing activities	(49,782)	(64,190)	(53,972)
Cash Flows from Financing Activities
Net change in deposits	77,137	70,864	8,779
Net change in federal funds purchased and securities sold under agreements to repurchase	(30,829)	(8,491)	22,853
Proceeds of FHLB advances			10,000
Repayment of FHLB advances	(5,000)
Purchase of Treasury Stock	(196)	(194)	(803)
Cash dividends paid on common stock	(4,443)	(4,115)	(3,943)
Net cash provided by financing activities	36,669	58,064	36,886
Net Increase (Decrease) in Cash and Cash Equivalents	6,145	6,304	(2,277)
Cash and Cash Equivalents - Beginning of Year	28,322	22,018	24,295
Cash and Cash Equivalents - End of Year	34,467	28,322	22,018
Cash paid during the year for:
Interest	5,064	4,151	3,610
Income taxes	5,102	5,012	3,079
Noncash investing activities:
Transfer of loans to other real estate owned	$ 59	$ 419	$ 231

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 - Summary of Significant Accounting Policies Nature of Operations The Farmers & Merchants Bancorp, Inc. (the Company) through its bank subsidiary, The Farmers & Merchants State Bank (the Bank) provides a variety of financial services to individuals and small businesses through its offices in Northwest Ohio and Northeast Indiana. Consolidation Policy The consolidated financial statements include the accounts of Farmers & Merchants Bancorp, Inc. and its wholly-owned subsidiaries, The Farmers & Merchants State Bank (the Bank), a commercial banking institution and Farmers & Merchants Risk Management, Inc. (the Captive), a Captive insurance company. All significant inter-company balances and transactions have been eliminated. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses and the valuation of mortgage servicing rights, goodwill, available for sale investment securities, other real estate owned and impaired loans. Actual results could differ from those estimates. The determination of the adequacy of the allowance for loan losses is based on estimates that are particularly susceptible to significant changes in the economic environment and market conditions. In connection with the determination of the estimated losses on loans, management obtains independent appraisals for significant collateral. The Bank’s loans are generally secured by specific items of collateral including real property, consumer assets, and business assets. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent on local economic conditions in the agricultural industry. While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans may be necessary based on changes in local economic conditions. In addition regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies may require the Bank to recognize additional losses based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the estimated losses on loans may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated. Cash and Cash Equivalents For purposes of the consolidated statement of cash flows, the Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. This includes cash on hand, amounts due from banks, and federal funds sold. Generally, federal funds are purchased for one day periods. Restrictions on Cash and Amounts Due from Banks The Bank is required to maintain average balances on hand with the Federal Reserve Bank. The aggregate reserve was $11.4 million for December 31, 2017 and it was $5.0 million for December 31, 2016. The Company and its subsidiaries maintain cash balances with high quality credit institutions. At times such balances may be in excess of the federally insured limits. Securities Debt securities are classified as available-for-sale. Securities available-for-sale are carried at fair value with unrealized gains and losses reported in other comprehensive income (loss). Net realized gains and losses on securities available for sale are included in noninterest income (expense) and, when applicable, are reported as a reclassification adjustment, net of tax, in other comprehensive income (loss). Gains and losses on sales of securities are determined on the specific-identification method. Declines in the fair value of securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, management considers (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. The related write-downs are included in earnings as realized losses. Other Securities Other Securities consists of Federal Home Loan Bank of Cincinnati stock and Farmer Mac stock. These stocks are carried at cost and are held to enable the Bank to conduct business with the entities. The Federal Home Loan Bank sells and purchases their stock at par. The Federal Home Loan Bank of Cincinnati stock is held as collateral security for all indebtedness of the Bank to the Federal Home Loan Bank. The Federal Home Loan Bank of Cincinnati is evaluated for impairment as conditions warrant. Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at the amount of unpaid principal, reduced by unearned discounts and deferred loan fees and costs, as well as, by the allowance for loan losses. Interest income is accrued on a daily basis based on the principal outstanding. Generally, a loan is classified as nonaccrual and the accrual of interest income is generally discontinued when a loan becomes ninety days past due as to principal or interest and these loans are placed on a “cash basis” for purposes of income recognition. Management may elect to continue the accrual of interest when the estimated net realizable value of collateral is sufficient to cover the principal and accrued interest, and the loan is in the process of collection. When a loan is placed on nonaccrual status, all previously accrued and unpaid interest receivable is charged against income. Loan origination and commitment fees and certain direct loan origination costs are deferred and amortized as a net adjustment to the related loan’s yield. The Bank is generally amortizing these costs over the contractual life of such loans. Allowance for Loan Losses The allowance for loan losses is established through a provision for loan losses charged to income. Loans deemed to be uncollectable and changes in the allowance relating to loans are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is evaluated on a regular basis by management and is based on management’s periodic review of the collectability of the loans in light of historical experiences, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective, as it requires estimates that are subject to revision as more information becomes available. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are classified as doubtful, substandard or special mention. For such loans that are also classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers non-classified loans and is based on historical loss experience adjusted for qualitative factors. The unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. A loan is considered impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis for commercial and agricultural loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral dependent. At 90 days delinquent, secured consumer loans are charged down to the value of the collateral, if repossession of the collateral is assured and/or in the process of repossession. Consumer mortgage loan deficiencies are charged down upon the sale of the collateral or sooner upon the recognition of collateral deficiency. For the majority of the Bank’s impaired loans, the Bank will apply the fair value of collateral or use a measurement incorporating the present value of expected future cash flows discounted at the loan’s effective rate of interest. To determine fair value of collateral, collateral asset values securing an impaired loan are periodically evaluated. Maximum time of re-evaluation is every 12 months for chattels and titled vehicles and every two years for real estate. In this process, third party evaluations are obtained. Until such time that updated appraisals are received, the Bank may discount the collateral value used. Large groups of homogeneous loans are collectively evaluated for impairment. Accordingly, the Bank does not separately identify individual consumer loans for impairment, unless such loans are the subject of a restructuring agreement due to financial difficulties of the borrower. For more information regarding the actual composition and classification of loans involved in the establishment of the allowance for loan loss, please see Note 4 provided here with the notes to consolidated financial statements. Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Net unrealized losses, if any, are recognized in a valuation allowance by charges to income. Servicing Assets Servicing assets are recognized as separate assets when rights are acquired through purchase or sale of financial assets. Capitalized servicing rights are amortized into noninterest expense in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights by predominant characteristics, such as interest rates and terms. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market based assumptions. Impairment is recognized through a valuation allowance for an individual stratum, to the extent that fair value is less than the capitalized amount for the stratum. Fees received for servicing loans owned by investors are based on a percentage of the outstanding monthly principal balance of such loans and are included in operating income as loan payments are received. Costs of servicing loans are charged to expense as incurred. Goodwill and Other Intangible Assets Goodwill results from business acquisitions and represents the excess of the purchase price over the fair value of acquired tangible assets and liabilities and identifiable intangible assets. Goodwill is assessed at least annually. If possible impairment is likely, the Bank will utilize the assistance of an independent third party for impairment and any such impairment is recognized in the period identified. Periodically the Bank will have an independent third party assess the possibility of impairment of Goodwill. Such an assessment was performed as of September 30, 2017. The goodwill impairment analysis consisted of a first step goodwill impairment test which was used to identify potential impairment by comparing the fair value of the relevant reporting unity with its carrying value, including goodwill. The analysis was performed under guidance of FASB ASC 350. The engagement would have expanded to the second step goodwill impairment valuation if necessary; however the findings showed the second step was not warranted. The analysis confirmed no impairment was likely. Therefore, the Bank concluded it is unlikely impairment of Goodwill has occurred from the goodwill established from the Bank’s acquisition which occurred on December 31, 2007. Other intangible assets consist of core deposit intangible assets arising from business acquisitions. They are initially measured at fair value and then are amortized on a straight line method over their estimated useful lives and evaluated for impairment. These assets are included in other assets on the consolidated balance sheets. Off Balance Sheet Instruments In the ordinary course of business, the Bank has entered into commitments to extend credit, including commitments under credit card arrangements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded. Foreclosed Real Estate Foreclosed real estate held for sale is carried at the lower of fair value minus estimated costs to sell, or cost. Costs of holding foreclosed real estate are charged to expense in the current period, except for significant property improvements, which are capitalized. Valuations are periodically performed by management and an allowance is established by a charge to non-interest expense if the carrying value exceeds the fair value minus the estimated costs to sell. Foreclosed real estate is classified as other real estate owned. The net loss from operations of foreclosed real estate held for sale is reported in non-interest expense. At December 31, the Bank’s holding of other real estate owned totaled $674 thousand and approximately $774 thousand for 2017 and 2016, respectively. Bank Premises and Equipment Land is carried at cost. Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is based on the estimated useful lives of the various properties and is computed using straight line and accelerated methods. Costs for maintenance and repairs are charged to operations as incurred. Gains and losses on dispositions are included in current operations. Federal Income Tax The Company’s income tax expense consists of the following components: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management’s judgment. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in tax expense. Based on management’s analysis, the Company did not have any uncertain tax positions as of December 31, 2017 and 2016. With a few exceptions, the Company is no longer subject to U.S. Federal, state or local examinations by tax authorities for years before 2014. Earnings Per Share Basic earnings per share represent income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. On August 18, 2017, the Company’s Board of Directors authorized a two-for-one stock split payable on September 20, 2017, for shareholders of record on September 5, 2017. See Note 12 for additional information. Stock-Based Compensation The fair value of restricted common stock is their fair market value on the date of grant. The fair value of restricted stock is amortized as compensation expense on a straight-line basis over the vesting period of the grants. Compensation expense recognized is included in salaries and wages in the consolidated statements of income. Treasury Stock Common stock shares repurchased are recorded at market value on date of purchase. Other Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the equity section of the balance sheet. Such items, along with net income, are components of other comprehensive income (loss). The components of other comprehensive income (loss) and related tax effects are as follows: (In Thousands) 2017 2016 2015 Net unrealized gain (loss) on available-for-sale securities $ 267 $ (2,721 ) $ 100 Reclassification adjustment for gain on sale of available-for-sale securities (47 ) (588 ) (451 ) Net unrealized gains (losses) 220 (3,309 ) (351 ) Tax expense (benefit) 74 (1,125 ) (119 ) Other comprehensive income (loss) $ 146 $ (2,184 ) $ (232 ) Reclassification Certain amounts in the 2016 and 2015 consolidated financial statements have been reclassified to conform with the 2017 presentation. These reclassifications had no effect on net income. Subsequent Events On January 19, 2018, the Company announced the authorization by its Board of Directors for the Company’s repurchase, either on the open market, or in privately negotiated transactions, of up to 400,000 shares of its outstanding common stock commencing January 19, 2018 and ending December 31, 2018. Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09 “Revenue from Contracts with Customers (Topic 606) i.e In January 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-01 “ Financial Instruments—Overall (Subtopic 825-10)—Recognition and Measurement of Financial Assets and Financial Liabilities.” requiring public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements; eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured and amortized at cost on the balance sheet; and requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the organization has elected to measure the liability at fair value in a accordance with the fair value option for financial instruments. ASU 2016-01 is effective for annual periods and interim periods within those annual periods, beginning after December 15, 2017. The amendments should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. The Company is assessing the impact of ASU 2016-01 on its accounting and disclosures. We will fully implement in first quarter 2018 as we work with third party vendors. In February 2016, the FASB issued ASU No. 2016-02 “ Leases (Topic 842).” In June 2016, FASB issued 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The ASU 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. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. Organizations will continue to use judgment to determine which loss estimation method is appropriate for their circumstances. The ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The ASU is effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (i.e., January 1, 2020, for calendar year entities). Early application will be permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently gathering information, reviewing possible vendors and has formed a committee to formulate the methodology to be used. Most importantly, the Company is gathering as much data as possible to enable review scenarios and determine which calculations will produce the most reliable results. At this time an additional external advisor has not been contracted, though the Bank has been reviewing the use of external software. In November 2016, the FASB issued ASU No. 2016-18 “ Statement of Cash Flows (Topic 230) – Restricted Cash.” December 15, 2017, and interim periods within those fiscal years and should be applied using a retrospective transition method to each period presented. Early adoption is permitted including adoption in an interim period. The Company has assessed ASU 2016-18 and does not expect a material impact on its accounting and disclosures as it currently does not have what would be considered “Restricted cash” at this time. In January 2017, the FASB issued ASU No. 2017-01 “ Business Combinations (Topic 805) – Clarifying the Definition of a Business.” In January 2017, the FASB issued ASU No. 2017-04 “Intangibles – Goodwill and other (Topic 350) – Simplifying the Test for Goodwill Impairment” In March 2017, the FASB issued Accounting Standards Update (ASU) No. 2017-08 “Receivables – Nonrefundable Fees and Other Cost (Subtopic 310-20), Premium Amortization on Purchased Callable Debit Securities.” In May 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-09 “ Compensation – Stock Compensation (Topic 718), Scope of Modification Accounting.” In December 2017, President Trump signed into law a tax reform act. Under the current accounting guidance in Accounting Standards Codification (ASC) 740, Income Taxes, the Company and its subsidiaries were required to account for the effect of the change in income tax rates and deferred balances in the period when the legislation is enacted which was December 2017. The adjustment of the deferred tax assets was less than $8 thousand on a consolidated basis. The Company is currently waiting to evaluate FASB’s possible accounting rule regarding treatment of the remaining stranded tax effects. The Company will choose to adopt such treatment as of January 1, 2018.

Business Combination & Asset Pu

Business Combination & Asset Purchase	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Business Combination & Asset Purchase	Note 2 – Business Combination & Asset Purchase The Company recognized core deposit intangible assets of $2.26 million with the purchase of offices. $1.17 million was recognized with the purchase of the Custar office on December 13, 2013 and $1.09 million with the Hicksville office on July 9, 2010. These are being amortized over an estimated remaining economic useful life of the deposits of 7 years on a straight line basis. The core deposit intangible is included in other assets on the consolidated balance sheets. The amortization expense for the years ended December 31, 2017, 2016 and 2015 was $245, $323, and $323 thousand, respectively. Amortization expense of the core deposit intangible assets remaining is as follows: Custar 2018 $ 167 2019 167 2020 161 Total $ 495

Securities

Securities	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	Note 3 - Securities The amortized cost and fair value of securities, with gross unrealized gains and losses, follows: (In Thousands) 2017 Amortized Gross Gross Fair Available-for-Sale: U.S. Treasury $ 21,219 $ — $ (241 ) $ 20,978 U.S. Government agencies 82,198 — (1,732 ) 80,466 Mortgage-backed securities 40,236 64 (790 ) 39,510 State and local governments 55,512 437 (505 ) 55,444 Total available-for-sale securities $ 199,165 $ 501 $ (3,268 ) $ 196,398 (In Thousands) 2016 Amortized Gross Gross Fair Available-for-Sale: U.S. Treasury $ 24,920 $ 1 $ (146 ) $ 24,775 U.S. Government agencies 84,266 3 (1,795 ) 82,474 Mortgage-backed securities 49,155 185 (879 ) 48,461 State and local governments 63,173 634 (990 ) 62,817 Total available-for-sale securities $ 221,514 $ 823 $ (3,810 ) $ 218,527 Investment securities will at times depreciate to an unrealized loss position. The Bank utilizes the following criteria to assess whether impairment is other than temporary. No one item by itself will necessarily signal that a security should be recognized as an other than temporary impairment. 1. The fair value of the security has significantly declined from book value. 2. A downgrade has occurred that lowered the credit rating to below investment grade (below Baa3 by Moody and BBB – by Standard and Poors.) 3. Dividends have been reduced or eliminated or scheduled interest payments have not been made. 4. The underwater security has longer than 10 years to maturity and the loss position had existed for more than 3 years. 5. Management does not possess both the intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value. If the impairment is judged to be other than temporary, the cost basis of the individual security shall be written down to fair value, thereby establishing a new cost basis. The new cost basis shall not be changed for subsequent recoveries in fair value. The amount of the write down shall be included in current earnings as a realized loss. The recovery in fair value, if any, shall be recognized in earnings when the security is sold. The table below is presented by category of security and length of time in a continuous loss position. The Bank currently does not hold any securities with other than temporary impairment. Information pertaining to securities with gross unrealized losses at December 31, 2017 and 2016, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows: 2017 (In Thousands) (In Thousands) Gross Fair Gross Fair Value U.S. Treasury $ (36 ) $ 6,924 $ (205 ) $ 14,054 U.S. Government agencies (314 ) 27,328 (1,418 ) 53,139 Mortgage-backed securities (70 ) 7,149 (720 ) 28,080 State and local governments (205 ) 24,999 (300 ) 11,567 Total available-for-sales securities $ (625 ) $ 66,400 $ (2,643 ) $ 106,840 2016 (In Thousands) (In Thousands) Gross Fair Value Gross Fair U.S. Treasury $ (146 ) $ 15,745 $ — $ — U.S. Government agencies (1,795 ) 77,471 — — Mortgage-backed securities (879 ) 36,474 — — State and local governments (983 ) 37,540 (7 ) 526 Total available-for-sales securities $ (3,803 ) $ 167,230 $ (7 ) $ 526 Unrealized losses on securities have not been recognized into income because the issuers’ bonds are of high credit quality, values have only been impacted by rate changes, and the Company has the intent and ability to hold the securities for the foreseeable future. The fair value is expected to recover as the bonds approach the maturity date. Sales of $13.6, $85.7, and $47.0 million for 2017, 2016, and 2015 respectively, generated gross realized gains and losses for the years ended December 31, as presented below: (In Thousands) 2017 2016 2015 Gross realized gains $ 58 $ 598 $ 451 Gross realized losses (11 ) (10 ) — Net realized gains $ 47 $ 588 $ 451 Tax expense related to net realized gains $ 16 $ 200 $ 153 The net realized gain on sales and related tax expense is a reclassification out of accumulated other comprehensive income. The net realized gain is included in net gain on sale of securities available-for-sale and the related tax expense is included in income tax expense in the consolidated statements of income and comprehensive income (loss). The amortized cost and fair value of debt securities at December 31, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (In Thousands) Amortized Fair Value One year or less $ 21,644 $ 21,618 After one year through five years 84,514 83,685 After five years through ten years 49,908 48,810 After ten years 2,863 2,775 Total $ 158,929 $ 156,888 Mortgage-backed securities 40,236 39,510 Total $ 199,165 $ 196,398 Investments with a carrying value and fair value of $82.9 million at December 31, 2017 and $129.4 million at December 31, 2016 were pledged to secure public deposits and securities sold under repurchase agreements. Other securities include Federal Home Loan Bank of Cincinnati and Farmer Mac stock as of December 31, 2017 and 2016.

Loans

Loans	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Loans	Note 4 - Loans The Company had $1.2 million in loans held for sale at December 31, 2017 as compared to $2.1 million in loans held for sale at December 31, 2016. Loans at December 31 are summarized below: Loans: 2017 2016 Consumer Real Estate $ 83,620 $ 86,234 Agricultural Real Estate 64,073 62,375 Agricultural 95,111 84,563 Commercial Real Estate 410,520 377,481 Commercial and Industrial 126,275 109,256 Consumer 37,757 33,179 Industrial Development Bonds 6,415 5,732 $ 823,771 $ 758,820 Less: Net deferred loan fees and costs (747 ) (726 ) 823,024 758,094 Less: Allowance for loan losses (6,868 ) (6,784 ) Loans - Net $ 816,156 $ 751,310 Following are the characteristics and underwriting criteria for each major type of loan the Bank offers: Commercial Real Estate: Construction, purchase, and refinance of business purpose real estate. Risks include potential construction delays and overruns, vacancies, collateral value subject to market value fluctuations, interest rate, market demands, borrower’s ability to repay in orderly fashion, and others. The Bank does employ stress testing on higher balance loans to mitigate risk by ensuring the customer’s ability to repay in a changing rate environment before granting loan approval. Agricultural Real Estate: Purchase of farm real estate or for permanent improvements to the farm real estate. Cash flow from the farm operation is the repayment source and is therefore subject to the financial success of the farm operation. Consumer Real Estate: Purchase, refinance, or equity financing of one to four family owner occupied dwelling. Success in repayment is subject to borrower’s income, debt level, character in fulfilling payment obligations, employment, and others. Commercial and Industrial: Loans to proprietorships, partnerships, or corporations to provide temporary working capital and seasonal loans as well as long term loans for capital asset acquisition. Risks include adequacy of cash flow, reasonableness of profit projections, financial leverage, economic trends, management ability, and others. The Bank does employ stress testing on higher balance loans to mitigate risk by ensuring the customer’s ability to repay in a changing rate environment before granting loan approval. Agricultural: Loans for the production and housing of crops, fruits, vegetables, and livestock or to fund the purchase or re-finance of capital assets such as machinery and equipment and livestock. The production of crops and livestock is especially vulnerable to commodity prices and weather. The vulnerability to commodity prices is offset by the farmer’s ability to hedge their position by the use of future contracts. The risk related to weather is often mitigated by requiring federal crop insurance. Consumer: Funding for individual and family purposes. Success in repayment is subject to borrower’s income, debt level, character in fulfilling payment obligations, employment, and others. Industrial Development Bonds (IDB): Funds for public improvements in the Bank’s service area. Repayment ability is based on the continuance of the taxation revenue as the source of repayment. The following is a maturity schedule by major category of loans at December 31, 2017: (In Thousands) Within After One After Total Consumer Real Estate $ 1,185 $ 13,979 $ 68,456 $ 83,620 Agricultural Real Estate 756 5,910 57,407 64,073 Agricultural 60,164 25,499 9,448 95,111 Commercial Real Estate 29,728 125,694 255,098 410,520 Commercial and Industrial 71,521 36,402 18,352 126,275 Consumer 5,634 23,946 8,177 37,757 Industrial Development Bonds 800 65 5,550 6,415 $ 169,788 $ 231,495 $ 422,488 $ 823,771 The distribution of fixed rate loans and variable rate loans by major loan category is as follows as of December 31, 2017: (In Thousands) Fixed Rate Variable Rate Consumer Real Estate $ 43,283 $ 40,337 Agricultural Real Estate 46,121 17,952 Agricultural 32,585 62,526 Commercial Real Estate 262,713 147,807 Commercial and Industrial 43,434 82,841 Consumer 32,869 4,888 Industrial Development Bonds 6,415 — Industrial Development Bonds are included in the commercial and industrial category for the remainder of the tables in this Note 4, unless specifically noted separately. The following table represents the contractual aging of the recorded investment in past due loans by portfolio classification of loans as of December 31, 2017 and 2016, net of deferred loan fees and costs: December 31, 2017 30-59 Days 60-89 Days Greater Than Total Current Total Recorded Consumer Real Estate $ 565 $ 212 $ 113 $ 890 $ 82,310 $ 83,200 $ — Agricultural Real Estate — — 101 101 63,943 64,044 — Agricultural — — — — 95,238 95,238 — Commercial Real Estate — — 38 38 409,915 409,953 — Commercial and Industrial — 42 — 42 132,745 132,787 — Consumer 34 2 7 43 37,759 37,802 — Total $ 599 $ 256 $ 259 $ 1,114 $ 821,910 $ 823,024 $ — December 31, 2016 30-59 Days 60-89 Days Greater Than Total Past Current Total Recorded Investment Consumer Real Estate $ 882 $ 15 $ 507 $ 1,404 $ 84,469 $ 85,873 $ — Agricultural Real Estate 12 — 132 144 62,192 62,336 — Agricultural 101 — — 101 84,591 84,692 — Commercial Real Estate 60 — — 60 376,827 376,887 — Commercial and Industrial — — — — 115,093 115,093 — Consumer 29 6 — 35 33,178 33,213 — Total $ 1,084 $ 21 $ 639 $ 1,744 $ 756,350 $ 758,094 $ — The following table presents the recorded investment in nonaccrual loans by portfolio class of loans as of December 31, 2017 and December 31, 2016: (In Thousands) 2017 2016 Consumer Real Estate $ 708 $ 1,091 Agricultural Real Estate 101 132 Agriculture — — Commercial Real Estate 38 — Commercial and Industrial 149 161 Consumer 7 — Total $ 1,003 $ 1,384 The Bank uses a nine tier risk rating system to grade its loans. The grade of a loan may change during the life of the loan. The risk ratings are described as follows. 1. Zero (0) Unclassified. Any loan which has not been assigned a classification. 2. One (1) Excellent. Credit to premier customers having the highest credit rating based on an extremely strong financial condition, which compares favorably with industry standards (upper quartile of The Risk Management Association ratios). Financial statements indicate a sound earnings and financial ratio trend for several years with satisfactory profit margins and excellent liquidity exhibited. Prime credits may also be borrowers with loans fully secured by highly liquid collateral such as traded stocks, bonds, certificates of deposit, savings account, etc. No credit or collateral exceptions exist and the loan adheres to the Bank’s loan policy in every respect. Financing alternatives would be readily available and would qualify for unsecured credit. This grade is summarized by high liquidity, minimum risk, strong ratios, and low handling costs. 3. Two (2) Good. Desirable loans of somewhat less stature than Grade 1, but with strong financial statements. Loan supported by financial statements containing strong balance sheets, generally with a leverage position less than 1.50, and a history of profitability. Probability of serious financial deterioration is unlikely. Possessing a sound repayment source (and a secondary source), which would allow repayment in a reasonable period of time. Individual loans backed by liquid personal assets, established history and unquestionable character. 4. Three (3) Satisfactory. Satisfactory loans of average or slightly above average risk – having some deficiency or vulnerability to changing economic conditions, but still fully collectible. Projects should normally demonstrate acceptable debt service coverage. Generally, customers should have a leverage position less than 2.00. May be some weakness but with offsetting features of other support readily available. Loans are meeting the terms of repayment. Loans may be graded 3 when there is no recent information on which to base a current risk evaluation and the following conditions apply: At inception, the loan was properly underwritten and did not possess an unwarranted level of credit risk; a. At inception, the loan was secured with collateral possessing a loan value adequate to protect the Bank from loss; b. The loan exhibited two or more years of satisfactory repayment with a reasonable reduction of the principal balance; c. During the period that the loan has been outstanding, there has been no evidence of any credit weakness. Some examples of weakness include slow payment, lack of cooperation by the borrower, breach of loan covenants, or the business is in an industry which is known to be experiencing problems. If any of the credit weaknesses is observed, a lower risk grade is warranted. 5. Four (4) Satisfactory / Monitored. A “4” (Satisfactory/Monitored) risk grade may be established for a loan considered satisfactory but which is of average credit risk due to financial weakness or uncertainty. The loans warrant a higher than average level of monitoring to ensure that weaknesses do not advance. The level of risk in Satisfactory/Monitored classification is considered acceptable and within normal underwriting guidelines, so long as the loan is given management supervision. 6. Five (5) Special Mention. Loans that possess some credit deficiency or potential weakness which deserves close attention, but which do not yet warrant substandard classification. Such loans pose unwarranted financial risk that, if not corrected, could weaken the loan and increase risk in the future. The key distinctions of a 5 (Special Mention) classification are that (1) it is indicative of an unwarranted level of risk, and (2) weaknesses are considered “potential”, versus “defined”, impairments to the primary source of loan repayment and collateral. 7. Six (6) Substandard. One or more of the following characteristics may be exhibited in loans classified substandard: a. Loans, which possess a defined credit weakness and the likelihood that a loan will be paid from the primary source, are uncertain. Financial deterioration is underway and very close attention is warranted to ensure that the loan is collected without loss. b. Loans are inadequately protected by the current net worth and paying capacity of the borrower. c. The primary source of repayment is weakened, and the Bank is forced to rely on a secondary source of repayment such as collateral liquidation or guarantees. d. Loans are characterized by the distinct possibility that the Bank will sustain some loss if deficiencies are not corrected. e. Unusual courses of action are needed to maintain a high probability of repayment. f. The borrower is not generating enough cash flow to repay loan principal; however, continues to make interest payments. g. The lender is forced into a subordinate position or unsecured collateral position due to flaws in documentation. h. Loans have been restructured so that payment schedules, terms and collateral represent concessions to the borrower when compared to the normal loan terms. i. The lender is seriously contemplating foreclosure or legal action due to the apparent deterioration in the loan j. There is significant deterioration in the market conditions and the borrower is highly vulnerable to these conditions. 8. Seven (7) Doubtful. One or more of the following characteristics may be exhibited in loans classified Doubtful: a. Loans have all of the weaknesses of those classified as Substandard. Additionally, however, these weaknesses make collection or liquidation in full based on existing conditions improbable. b. The primary source of repayment is gone, and there is considerable doubt as to the quality of the secondary source of repayment. c. The possibility of loss is high, but, because of certain important pending factors which may strengthen the loan, loss classification is deferred until its exact status is known. A Doubtful classification is established deferring the realization of the loss. 9. Eight (8) Loss. Loans are considered uncollectable and of such little value that continuing to carry them as assets on the institution’s financial statements is not feasible. Loans will be classified Loss when it is neither practical nor desirable to defer writing off or reserving all or a portion of a basically worthless asset, even though partial recovery may be possible at some time in the future. The following table represents the risk category of loans by portfolio class, net of deferred fees, based on the most recent analysis performed as of the time periods shown of December 31, 2017 and December 31, 2016. (In Thousands) Agricultural Real Estate Agricultural Commercial Real Estate Commercial and Industrial Development 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 1-2 $ 4,143 $ 4,399 $ 6,558 $ 7,334 $ 1,244 $ 677 $ 9,205 $ 10,060 $ — $ — 3 15,244 16,660 37,267 31,397 32,498 27,858 15,277 14,064 3,489 2,640 4 43,416 39,808 51,312 44,560 359,600 333,523 99,581 83,100 2,926 3,092 5 1,125 1,209 101 1,234 7,758 8,321 1,381 1,379 — — 6 116 260 — 167 8,853 6,508 817 641 — — 7 — — — — — — 111 117 — — 8 — — — — — — — — — — Total $ 64,044 $ 62,336 $ 95,238 $ 84,692 $ 409,953 $ 376,887 $ 126,372 $ 109,361 $ 6,415 $ 5,732 For consumer residential real estate, and other, the Company also evaluates credit quality based on the aging status of the loan, which was previously stated, and by payment activity. The following tables present the recorded investment in those classes based on payment activity and assigned risk grading as of December 31, 2017 and December 31, 2016. (In Thousands) Consumer Real Estate 2017 2016 Grade Pass $ 82,632 $ 85,322 Special mention (5) — 25 Substandard (6) 488 368 Doubtful (7) 80 158 Total $ 83,200 $ 85,873 (In Thousands) Consumer - Consumer - Other 2017 2016 2017 2016 Performing $ 4,108 $ 4,061 $ 33,666 $ 29,120 Nonperforming — — 28 32 Total $ 4,108 $ 4,061 $ 33,694 $ 29,152 Information about impaired loans as of and for the years ended December 31, 2017 and 2016 are as follows: (In Thousands) 2017 2016 Impaired loans without a valuation allowance $ 1,131 $ 1,141 Impaired loans with a valuation allowance 614 711 Total impaired loans $ 1,745 $ 1,852 Valuation allowance related to impaired loans $ 106 $ 135 Total non-accrual loans $ 1,003 $ 1,384 Total loans past-due ninety days or more and still accruing $ — $ — 2017 2016 2015 Average investment in impaired loans $ 1,885 $ 1,802 $ 2,509 Interest income recognized on impaired loans $ 57 $ 64 $ 96 Interest income recognized on a cash basis on impaired loans $ 23 $ 27 $ 60 No additional funds are committed to be advanced in connection with impaired loans. The Bank had approximately $0.7 million of its impaired loans classified as trouble debt restructured as of December 31, 2017 and December 31, 2016. The following table represents the years ended December 31, 2017 and 2016. (In thousands) (In thousands) December 31, 2017 Troubled Debt Restructurings Number of Pre- Post- December 31, 2016 Troubled Debt Restructurings Number of Pre- Post- Commercial Real Estate 0 $ — $ — Commercial Real Estate 1 $ 138 $ 138 Commercial and Industrial 1 38 38 Commercial and Industrial 0 — — For the years ended December 31, 2017 and 2016, there were no TDR’s that subsequently defaulted after modification. For the Bank’s impaired loans, the Bank may apply the observable market price methodology or utilize a measurement incorporating the present value of expected future cash flows discounted at the loan’s effective rate of interest. To determine observable market price, collateral asset values securing an impaired loan are periodically evaluated. Maximum time of re-evaluation is every 12 months for chattels and titled vehicles and every two years for real estate. In this process, third party evaluations are obtained and heavily relied upon. Until such time that updated appraisals are received, the Bank may discount the collateral value used. The Bank uses the following guidelines as stated in policy to determine when to realize a charge-off, whether a partial or full loan balance. A charge down in whole or in part is realized when unsecured consumer loans, credit card credits and overdraft lines of credit reach 90 days delinquency. At 120 days delinquent, secured consumer loans are charged down to the value of the collateral, if repossession of the collateral is assured and/or in the process of repossession. Consumer mortgage loan deficiencies are charged down upon the sale of the collateral or sooner upon the recognition of collateral deficiency. Commercial and agricultural credits are charged down at 120 days delinquency, unless an established and approved work-out plan is in place or litigation of the credit will likely result in recovery of the loan balance. Upon notification of bankruptcy, unsecured debt is charged off. Additional charge-off may be realized as further unsecured positions are recognized The following tables present loans individually evaluated for impairment by portfolio class of loans as of December 31, 2017 and 2016: (In Thousands) Recorded Unpaid Related Average Interest Interest 2017 With no related allowance recorded: Consumer Real Estate $ 495 $ 495 $ — $ 911 $ 30 $ 21 Agricultural Real Estate 101 101 — 123 — — Agricultural — — — 27 — — Commercial Real Estate 202 202 — 51 1 — Commercial and Industrial 333 333 — 85 2 — Consumer — — — — — — With a specific allowance recorded: Consumer Real Estate 80 80 21 88 — — Agricultural Real Estate — — — — — — Agricultural — — — — — — Commercial Real Estate 423 423 46 486 24 2 Commercial and Industrial 111 111 39 114 — — Consumer — — — — — — Totals: Consumer Real Estate $ 575 $ 575 $ 21 $ 999 $ 30 $ 21 Agricultural Real Estate $ 101 $ 101 $ — $ 123 $ — $ — Agricultural $ — $ — $ — $ 27 $ — $ — Commercial Real Estate $ 625 $ 625 $ 46 $ 537 $ 25 $ 2 Commercial and Industrial $ 444 $ 444 $ 39 $ 199 $ 2 $ — Consumer $ — $ — $ — $ — $ — $ — (In Thousands) Recorded Unpaid Related Average Interest Interest 2016 With no related allowance recorded: Consumer Real Estate $ 1,009 $ 1,009 $ — $ 101 $ 16 $ 4 Agricultural Real Estate 132 132 — 147 — — Agricultural — — — — — — Commercial Real Estate — — — 427 24 23 Commercial and Industrial — — — 337 — — Consumer — — — — — — With a specific allowance recorded: Consumer Real Estate 94 94 34 344 — — Agricultural Real Estate — — — 9 — — Agricultural — — — — — — Commercial Real Estate 501 501 66 191 — — Commercial and Industrial 116 116 35 246 24 — Consumer — — — — — — Totals: Consumer Real Estate $ 1,103 $ 1,103 $ 34 $ 445 $ 16 $ 4 Agricultural Real Estate $ 132 $ 132 $ — $ 156 $ — $ — Agricultural $ — $ — $ — $ — $ — $ — Commercial Real Estate $ 501 $ 501 $ 66 $ 618 $ 24 $ 23 Commercial and Industrial $ 116 $ 116 $ 35 $ 583 $ 24 $ — Consumer $ — $ — $ — $ — $ — $ — On January 1, 2015, the Company adopted Accounting Standards Update (ASU) 2014-04, “Receivables,—Troubled Debt Restructuring by Creditors.” As of December 31, 2017 the Company had $25 thousand of foreclosed residential real estate property obtained by physical possession and $54 thousand of consumer mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process according to local jurisdictions. This compares to the Company having $169 thousand of foreclosed residential real estate property obtained by physical possession and $112 thousand of consumer mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process according to local jurisdictions as of December 31, 2016. The ALLL has a direct impact on the provision expense. An increase in the ALLL is funded through recoveries and provision expense. The following tables summarize the activities in the allowance for credit losses. The following is an analysis of the allowance for credit losses for the years ended December 31: (In Thousands) 2017 2016 2015 Allowance for Loan Losses Balance at beginning of year $ 6,784 $ 6,057 $ 5,905 Provision for loan loss 222 1,121 625 Loans charged off (288 ) (550 ) (1,030 ) Recoveries 150 156 557 Balance at ending of year $ 6,868 $ 6,784 $ 6,057 Allowance for Unfunded Loan Commitments & Letters of Credit $ 227 $ 217 $ 208 Total Allowance for Credit Losses $ 7,095 $ 7,001 $ 6,265 The Company segregates its Allowance for Loan and Lease Losses (ALLL) into two reserves: The ALLL and the Allowance for Unfunded Loan Commitments and Letters of Credit (AULC). When combined, these reserves constitute the total Allowance for Credit Losses (ACL). The AULC is reported within other liabilities on the balance sheet while the ALLL is netted within the loans, net asset line. The ACL presented above represents the full amount of reserves available to absorb possible credit losses. The following table breaks down the activity within ALLL for each loan portfolio segment and shows the contribution provided by both the recoveries and the provision along with the reduction of the allowance caused by charge-offs. Additional analysis related to the allowance for credit losses as of December 31, 2017 and 2016 is as follows: (In Thousands) Consumer Agricultural Agricultural Commercial Commercial Consumer Unfunded Loan Unallocated Total 2017 ALLOWANCE FOR CREDIT LOSSES: Beginning balance $ 316 $ 241 $ 616 $ 3,250 $ 1,318 $ 394 $ 217 $ 649 $ 7,001 Charge Offs (4 ) — — (21 ) — (263 ) — — (288 ) Recoveries 13 — 8 15 12 102 — — 150 Provision (Credit) 18 3 43 (95 ) 216 208 — (171 ) 222 Other Non-interest expense related to unfunded — — — — — — 10 — 10 Ending Balance $ 343 $ 244 $ 667 $ 3,149 $ 1,546 $ 441 $ 227 $ 478 $ 7,095 Ending balance: individually evaluated for impairment $ 21 $ — $ — $ 46 $ 39 $ — $ — $ — $ 106 Ending balance: collectively evaluated for impairment $ 322 $ 244 $ 667 $ 3,103 $ 1,507 $ 441 $ 227 $ 478 $ 6,989 Ending balance: loans acquired with deteriorated credit quality $ — $ — $ — $ — $ — $ — $ — $ — $ — FINANCING RECEIVABLES: Ending balance $ 83,200 $ 64,044 $ 95,238 $ 409,953 $ 132,787 $ 37,802 $ — $ — $ 823,024 Ending balance: individually evaluated for impairment $ 575 $ 101 $ — $ 625 $ 444 $ — $ — $ — $ 1,745 Ending balance: collectively evaluated for impairment $ 82,625 $ 63,943 $ 95,238 $ 409,328 $ 132,343 $ 37,802 $ — $ — $ 821,279 Ending balance: loans acquired with deteriorated credit quality $ 122 $ — $ — $ — $ — $ — $ — $ — $ 122 (In Thousands) Consumer Agricultural Agricultural Commercial Commercial Consumer Unfunded Loan Unallocated Total 2016 ALLOWANCE FOR CREDIT LOSSES: Beginning balance $ 338 $ 211 $ 582 $ 2,516 $ 1,229 $ 337 $ 208 $ 844 $ 6,265 Charge Offs (106 ) — (21 ) (93 ) (20 ) (310 ) — — (550 ) Recoveries 28 — 10 20 11 87 — — 156 Provision (Credit) 56 30 45 807 98 280 — (195 ) 1,121 Other Non-interest expense related to unfunded — — — — — — 9 — 9 Ending Balance $ 316 $ 241 $ 616 $ 3,250 $ 1,318 $ 394 $ 217 $ 649 $ 7,001 Ending balance: individually evaluated for impairment $ 34 $ — $ — $ 66 $ 35 $ — $ — $ — $ 135 Ending balance: collectively evaluated for impairment $ 282 $ 241 $ 616 $ 3,184 $ 1,283 $ 394 $ 217 $ 649 $ 6,866 Ending balance: loans acquired with deteriorated credit quality $ 1 $ — $ — $ — $ — $ — $ — $ — $ 1 FINANCING RECEIVABLES: Ending balance $ 85,873 $ 62,336 $ 84,692 $ 376,887 $ 115,093 $ 33,213 $ — $ — $ 758,094 Ending balance: individually evaluated for impairment $ 1,103 $ 132 $ — $ 501 $ 116 $ — $ — $ — $ 1,852 Ending balance: collectively evaluated for impairment $ 84,770 $ 62,204 $ 84,692 $ 376,386 $ 114,977 $ 33,213 $ — $ — $ 756,242 Ending balance: loans acquired with deteriorated credit quality $ 200 $ — $ — $ — $ — $ — $ — $ — $ 200

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Premises and Equipment	Note 5 - Premises and Equipment The major categories of banking premises and equipment and accumulated depreciation at December 31 are summarized below: (In Thousands) 2017 2016 Land $ 5,892 $ 5,647 Buildings (useful life 15-39 years) 23,977 23,526 Furnishings (useful life 3-15 years) 13,351 12,673 43,220 41,846 Less: Accumulated depreciation (21,603 ) (20,389 ) Premises and Equipment (Net) $ 21,617 $ 21,457 Depreciation expense for the years ended December 31, 2017, 2016 and 2015 amounted to $1.6, $1.5, and $1.4 million, respectively. Construction in Progress of $109 thousand as of December 31, 2017 represented remodeling expenses incurred for a building purchased in Findlay, Ohio to be opened first quarter 2018.

Servicing

Servicing	12 Months Ended
	Dec. 31, 2017
Transfers and Servicing [Abstract]
Servicing	Note 6 - Servicing Loans serviced for others are not included in the accompanying consolidated balance sheets. The unpaid principal balances of loans serviced for others were $288.6 and $280.4 million at December 31, 2017 and 2016, respectively. The balance of capitalized servicing rights included in other assets at December 31, 2017 and 2016, was $2.3 and $2.2 million, respectively. The capitalized addition of servicing rights is included in net gain on sale of loans on the consolidated statement of income. The fair market value of the capitalized servicing rights as of December 31, 2017 and 2016 was $3.1 million and $2.5 million, respectively. The valuations were completed by stratifying the loans into like groups based on loan type and term. Impairment was measured by estimating the fair value of each stratum, taking into consideration an estimated level of prepayment based upon current market conditions. An average constant prepayment rate of 10.4% and 14.3% were utilized for 2017 and 2016, respectively. All stratums showed positive values compared to carrying value using a discount yield of 6.07% for 2017 and 5.38% for 2016. The following summarizes mortgage servicing rights capitalized and amortized during each year: (In Thousands) 2017 2016 Beginning Year $ 2,192 $ 2,056 Capitalized Additions 460 555 Amortization (353 ) (419 ) Valuation Allowance — — End of Year $ 2,299 $ 2,192

Deposits

Deposits	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Deposits	Note 7 - Deposits Time deposits as of December 31 consist of the following: (In Thousands) 2017 2016 Time deposits under $250,000 $ 165,866 $ 179,387 Time deposits of $250,000 or more 21,700 19,443 $ 187,566 $ 198,830 At December 31, 2017 the scheduled maturities for time deposits are as follows: (In Thousands) 2018 $ 83,734 2019 38,274 2020 25,787 2021 26,441 2022 12,701 Thereafter 629 $ 187,566

Federal Funds Purchased and Sec

Federal Funds Purchased and Securities Sold Under Agreement to Repurchase	12 Months Ended
	Dec. 31, 2017
Brokers and Dealers [Abstract]
Federal Funds Purchased and Securities Sold Under Agreement to Repurchase	Note 8 - Federal Funds Purchased and Securities Sold Under Agreement to Repurchase The Bank’s policy requires qualifying securities to be used as collateral for the underlying repurchase agreements. As of December 31, 2017 and 2016 securities with a market value of $35.9 million and $55.2 million, respectively, were pledged to secure the repurchase agreements. The table below presents the daily securities sold under agreement to repurchase and the term repurchase agreements. It does not include the Bank’s Federal Funds purchased. Daily Securities Sold Under Agreement to Repurchase Amount Weighted Maximum Amount Approximate Approximate 2017 $ 6,145 1.19 % $ 14,929 $ 10,253 0.96 % 2016 $ 32,814 0.20 % $ 43,929 $ 39,928 0.10 % Term CD’s Sold Under Agreement to Repurchase Amount Weighted Maximum Amount Approximate Approximate 2017 $ 22,925 1.97 % $ 22,925 $ 21,172 1.81 % 2016 $ 20,510 1.96 % $ 20,510 $ 19,562 1.88 % The Company had $10.4 and $17.0 million of Federal Funds Purchased as of December 31, 2017 and December 31, 2016 respectively. The $29.1 million in Securities Sold Under Agreements to Repurchase were comprised of U.S. Treasuries and government agency securities. The table below shows the remaining contractual maturity in the repurchase agreements December 31, 2017. December 31, 2017 Remaining Contractual Maturity of the Agreements Overnight & Up to 30 30-90 Greater Than 90 days Total Federal funds Purchased $ 10,425 $ — $ — $ — $ 10,425 Repurchase Agreements US Treasury & agency securities 6,145 — — 22,925 29,070 Total $ 16,570 $ — $ — $ 22,925 $ 39,495

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Federal Home Loan Bank Advances	Note 9 - Federal Home Loan Bank Advances Long term debit consists of various loans from the Federal Home Loan Bank. Repayment structures vary, ranging from monthly installments, annual payments or upon maturity. Interest payments are due monthly. As of December 31, 2017, the Bank had one loan which was structured as single maturity with interest rate of 1.61%. Total borrowings were $5.0 million and $10.0 million for December 31, 2017 and 2016, respectively. The advances were secured by $17.3 and $17.9 million of mortgage loans as of December 31, 2017 and 2016, respectively under a blanket collateral agreement. The advances are subject to pre-payment penalties and the provisions and conditions of the credit policy of the Federal Home Loan Bank. Future obligations of the advances are as follows at December 31, 2017: (In Thousands) 2018 $ 5,000 The Bank had access to $69 million and $58 million of unsecured borrowings through correspondent banks as of both December 31, 2017 and December 31, 2016. $94.6 million and $71.8 million at the end of the same time periods, respectively, were unpledged securities which could be sold or used as collateral. An additional $5.7 million at December 31, 2017, and $4.7 million at December 31, 2016, were available from the Federal Home Loan Bank based on current pledging, with up to $116.8 million and $115.7 million, respectively, available provided adequate collateral is pledged.

Federal Income Taxes

Federal Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal Income Taxes	Note 10 - Federal Income Taxes The Tax Cuts and Jobs Act was enacted on December 22, 2017. Among other things, the new law (i) establishes a new, flat corporate federal statutory income tax rate of 21%, (ii) eliminates the corporate alternative minimum tax and allows the use of any such carryforwards to offset regular tax liability for any taxable year, (iii) limits the deduction for net interest expense incurred by U.S. corporations, (iv) allows businesses to immediately expense, for tax purposes, the cost of new investments in certain qualified depreciable assets, (v) eliminates or reduces certain deductions related to meals and entertainment expenses, (vi) modifies the limitation on excessive employee remuneration to eliminate the exception for performance-based compensation and clarifies the definition of a covered employee and (vii) limits the deductibility of deposit insurance premiums. The Tax Cuts and Jobs Act also significantly changes U.S. tax law related to foreign operations, however, such changes do not currently impact us. As stated above, as a result of the enactment of the Tax Cuts and Jobs Act on December 22, 2017, we remeasured our deferred tax assets and liabilities based upon the newly enacted U.S. statutory federal income tax rate of 21%, which is the tax rate at which these assets and liabilities are expected to reverse in the future. We recognized a net tax benefit related to the remeasurement of our deferred tax assets and liabilities totaling $8 thousand. The components of income tax expense (benefit) for the years ended December 31 are as follows: (In Thousands) 2017 2016 2015 Current: Federal $ 5,162 $ 4,601 $ 3,941 Deferred: Federal 29 55 (122 ) Federal - impact of enacted changes in tax law (8 ) — — $ 5,183 $ 4,656 $ 3,819 The following is a reconciliation of the statutory federal income tax rate to the effective tax rate: (In Thousands) 2017 2016 2015 Income tax at statutory rates $ 6,045 $ 5,521 $ 4,792 Decrease resulting from: Tax exempt interest (413 ) (468 ) (554 ) Adjustment of deferred taxes for enacted changes in tax law (8 ) — — Section 831 deduction (318 ) (351 ) (351 ) Change in other (123 ) (46 ) (68 ) $ 5,183 $ 4,656 $ 3,819 Deferred tax assets and liabilities at December 31 are comprised of the following: (In Thousands) 2017 2016 Deferred Tax Assets: Allowance for loan losses $ 1,464 $ 2,326 Other 399 553 Net unrealized gain on available- for-sale securities 581 1,016 Total deferred tax assets 2,444 3,895 Deferred Tax Liabilities: Accreted discounts on bonds 55 83 FHLB stock dividends 462 744 Mortgage servicing rights 490 752 Other 1,185 1,745 Net unrealized gain on available- for-sale securities — — Total deferred tax liabilities 2,192 3,324 Net Deferred Tax Asset $ 252 $ 571

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Benefit Plans	Note 11 - Employee Benefit Plans The Bank has established a 401(k) profit sharing plan, which allows eligible employees to save at a minimum one percent of eligible compensation on a pre-tax basis, subject to certain Internal Revenue Service limitations. The Bank will match 50% of employee 401(k) contributions up to four percent of total eligible compensation. In addition, the Bank may make a discretionary contribution from time to time. A participant is 100% vested in the participant’s deferral contributions and employer matching contributions. A six-year vesting schedule applies to employer discretionary contributions. Contributions expensed for the 401(k) profit sharing plan for both the employer matching contribution and the discretionary contribution were $972, $877 and $835 thousand for 2017, 2016 and 2015, respectively. Restricted Stock Awards The Company has a Long-Term Stock Incentive Plan under which 32,000 shares of restricted stock were issued to 74 employees during 2017, 32,300 shares of restricted stock were issued to 74 employees during 2016 and 32,000 shares of restricted stock were issued to 67 employees during 2015. Under the plan, the shares vest 100% in three years. During the 3 year vesting period, the employees receive dividends or dividend equivalent compensation on the shares. Due to employee termination, there were 1,080, 1,546, and 200 forfeited during 2017, 2016 and 2015, respectively. During 2017, 1 employee retired and received 640 shares from the shares awarded in 2014, 2015 and 2016. During 2016, due to retirement, 4 employees received 2,394 shares from awards granted in 2013, 2014 and 2015. During 2015, 1 employee retired and received 500 shares from awards granted in 2012, 2013, and 2014 and 650 shares were paid to the estate of a deceased employee awarded during the same time periods. During 2017, 24,230 shares awarded in 2014 were 100% vested and 52 employees received the stock. During 2016, 20,050 shares awarded in 2013, were vested 100% and 45 employees received the stock. During 2015, 19,440 shares awarded in 2012, were vested 100% and 45 employees received the stock. Compensation expense applicable to the restricted stock totaled $507, $402 and $314 thousand for the years ending December 31, 2017, 2016 and 2015, respectively. The following table summarizes the activity of restricted stock awards adjusted for a 2-for-1 stock split on September 20, 2017 as of December 31: Year Ended December 31, 2017 2016 2015 Number of Weighted Number Weighted Number Weighted Beginning of period 86,300 14.10 77,990 12.46 66,780 11.39 Granted 32,000 27.79 32,300 16.01 32,000 13.18 Vested (24,870 ) 28.60 (22,444 ) 15.86 (20,590 ) 13.17 Forfeited (1,080 ) 37.06 (1,546 ) 15.77 (200 ) 13.04 Nonvested, end of period 92,350 19.17 86,300 14.10 77,990 12.46 As of December 31, 2017, there was $1.1 million of unrecognized compensation cost related to the nonvested portion of restricted stock awards under the plan. Expense for restricted stock awards of $507 thousand, $402 thousand, and $314 thousand was recorded for the years ended December 31, 2017, 2016, and 2015, respectively.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Note 12 - Earnings Per Share Basic earnings per share is calculated using the two-class method. The two-class method is an earnings allocation formula under which earnings per share is calculated from common stock and participating securities according to dividends declared and participation rights in undistributed earnings. Under this method, all earnings distributed and undistributed, are allocated to participating securities and common shares based on their respective rights to receive dividends. Unvested share-based payment awards that contain non-forfeitable rights to dividends are considered participating securities (i.e. unvested restricted stock), not subject to performance based measures. Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding. Application of the two-class method for participating securities results a more dilutive basic earnings per share as the participating securities are allocated the same amount of income as if they are outstanding for purposes of basic earnings per share. There is no additional potential dilution in calculating diluted earnings per share, therefore basic and diluted earnings per share are the same amounts. Other than the restricted stock plan, the Company has no other stock based compensation plans. The table below presents basic and diluted earnings per share for the years ended December 31, 2017, 2016, and 2015. Year Ended December 31, December 31, December 31, Earnings per share Net income $ 12,720 $ 11,664 $ 10,340 Less: distributed earnings allocated to participating securities (45 ) (37 ) (31 ) Less: undistributed earnings allocated to participating securities (77 ) (64 ) (47 ) Net earnings available to common shareholders $ 12,598 $ 11,563 $ 10,262 Weighted average common shares outstanding including participating securities 9,250,825 9,224,230 9,234,116 Less: average unvested restricted shares (1) (88,664 ) (79,964 ) (70,000 ) Weighted average common shares outstanding (1) 9,162,161 9,144,266 9,164,116 Basic and diluted earnings per share (1) $ 1.38 $ 1.27 $ 1.12 (1) Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Note 13 - Related Party Transactions In the ordinary course of business, the Bank has granted loans to senior officers and directors and their affiliated companies amounting to $1.5 million and $1.5 million at December 31, 2017 and 2016, respectively. No new loans were approved during 2017 of which no additional borrowings were utilized. During 2017, subsequent advances totaled $10.4 million and payments of $10.4 million were received. The difference in related borrowings amounted to $22 thousand, net increase. Deposits of directors, executive officers and companies in which they have a direct or indirect ownership as of December 31, 2017 and 2016, amounted to $23.4 million and $21.7 million, respectively.

Off Balance Sheet Activities

Off Balance Sheet Activities	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Off Balance Sheet Activities	Note 14 - Off Balance Sheet Activities Credit Related Financial Instruments The Bank is a party to credit related financial instruments with off-balance-sheet risk in the normal course of business to meet the financing need of its customers. These financial instruments include commitments to extend credit, Standby Letters of Credit, and Commercial Letters of Credit. Such commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The Bank’s exposure to credit loss is represented by the contractual amount of these commitments. The Bank follows the same credit policies in making commitments as it does for on-balance-sheet instruments. The allowance for credit losses as it relates to unfunded loan commitments (AULC) is included under other liabilities. The AULC as of December 31, 2017 and 2016 was $227 thousand and $217 thousand, respectively. At December 31, 2017 and 2016, the following financial instruments were outstanding whose contract amounts represent credit risk: (In Thousands) 2017 2016 Commitments to extend credit $ 237,774 $ 223,534 Credit card arrangements 20,184 18,316 Standby letters of credit 791 875 Commitments to extend credit, credit card arrangements and Standby Letters of Credit all include exposure to some credit loss in the event of nonperformance of the customer. The Bank’s credit policies and procedures for credit commitments and financial guarantees are the same as those for extensions of credit that are recorded in the financial statements. Due to the fact that these instruments have fixed maturity dates, and because many of them expire without being drawn upon, they generally do not present any significant liquidity risk to the Bank. Collateral Requirements To reduce credit risk related to the use of credit-related financial instruments, the Bank might deem it necessary to obtain collateral. The amount and nature of the collateral obtained is based on the Bank’s credit evaluation of the customer. Collateral held varies but may include cash, securities, accounts receivable, inventory, property, plant, and real estate. Legal Contingencies Various legal claims also arise from time to time in the normal course of business, which, in the opinion of management, will have no material effect on the Company’s consolidated financial statements.

Minimum Regulatory Capital Requ

Minimum Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Minimum Regulatory Capital Requirements	Note 15 - Minimum Regulatory Capital Requirements The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s and Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. The Basel III Capital Rules, a new comprehensive capital framework for U.S. banking organizations, became effective for on January 1, 2015 (subject to a phase-in period for certain provisions). Quantitative measures established by the Basel III Capital Rules to ensure capital adequacy require the maintenance of minimum amounts and ratios (set forth in the table below) of Common Equity Tier 1 capital, Tier 1 capital and Total capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital to adjusted quarterly average assets (as defined). In connection with the adoption of the Basel III Capital Rules, we elected to opt-out of the requirement to include most components of accumulated other comprehensive income in Common Equity Tier 1. Common Equity Tier 1 is reduced by, goodwill and other intangible assets, net of associated deferred tax liabilities, and subject to transition provisions. The Common Equity Tier 1 (beginning in 2015), Tier 1 and Total capital ratios are calculated by dividing the respective capital amounts by risk-weighted assets. Risk-weighted assets are calculated based on regulatory requirements and include total assets, with certain exclusions, allocated by risk weight category, and certain off-balance-sheet items, among other things. The leverage ratio is calculated by dividing Tier 1 capital by adjusted quarterly average total assets, which exclude goodwill and other intangible assets, among other things. When fully phased in on January 1, 2019, the Basel III Capital Rules will require the Company and Bank to maintain (i) a minimum ratio of Common Equity Tier 1 capital to risk-weighted assets of at least 4.5%, plus a 2.5% “capital conservation buffer” (which is added to the 4.5% Common Equity Tier 1 capital ratio as that buffer is phased in, effectively resulting in a minimum ratio of Common Equity Tier 1 capital to risk-weighted assets of at least 7.0% upon full implementation), (ii) a minimum ratio of Tier 1 capital to risk-weighted assets of at least 6.0%, plus the capital conservation buffer (which is added to the 6.0% Tier 1 capital ratio as that buffer is phased in, effectively resulting in a minimum Tier 1 capital ratio of 8.5% upon full implementation), (iii) a minimum ratio of Total capital (that is, Tier 1 plus Tier 2) to risk-weighted assets of at least 8.0%, plus the capital conservation buffer (which is added to the 8.0% total capital ratio as that buffer is phased in, effectively resulting in a minimum total capital ratio of 10.5% upon full implementation) and (iv) a minimum leverage ratio of 4.0%, calculated as the ratio of Tier 1 capital to average quarterly assets. The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and will be phased in over a four-year period (increasing by that amount on each subsequent January 1, until it reaches 2.5% on January 1, 2019). The capital conservation buffer was 1.25 percent at December 31, 2017. The Basel III Capital Rules also provide for a “countercyclical capital buffer” that is applicable to only certain covered institutions and does not have any current applicability to the Company or Bank. The capital conservation buffer is designed to absorb losses during periods of economic stress and, as detailed above, effectively increases the minimum required risk-weighted capital ratios. Banking institutions with a ratio of Common Equity Tier 1 capital to risk-weighted assets below the effective minimum (4.5% plus the capital conservation buffer and, if applicable, the countercyclical capital buffer) will face constraints on dividends, equity repurchases and compensation based on the amount of the shortfall. Management believes, as of December 31, 2017, that the Bank meets all the capital adequacy requirements to which it is subject. As of December 31, 2017 the most recent notification from the FDIC indicated the Bank was categorized as well capitalized under the regulatory framework for prompt corrective action. To remain categorized as well capitalized, the Bank will have to maintain minimum total risk-based, Tier I risk-based, Common Tier 1 and Tier I leverage ratios as disclosed in the table to follow. There are no conditions or events since the most recent notification that management believes have changed the Bank’s prompt corrective action category. The following tables present actual and required capital ratios as of December 31, 2017 and December 31, 2016 under the Basel III Capital Rules. The minimum required capital amounts presented include the minimum required capital levels as of December 31, 2017 and December 31, 2016. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. The Company and the Bank’s actual and required capital amounts and ratios as of December 31, 2017 are as follows: Actual Minimum Capital Required to Well-Capitalized (000’s) (000’s) (000’s) As of December 31, 2017 Amount Ratio Amount Ratio Amount Ratio Common Equity Tier 1 Capital (to Risk Weighted Assets) Consolidated $ 131,493 14.73 % $ 40,177 4.50 % N/A N/A Farmers & Merchants State Bank 107,006 12.04 % 39,992 4.50 % $ 57,767 6.50 % Total Risk-Based Capital (to Risk Weighted Assets) Consolidated 138,588 15.52 % 71,426 8.00 % N/A N/A Farmers & Merchants State Bank 114,101 12.84 % 71,098 8.00 % 88,872 10.00 % Tier 1 Capital (to Risk Weighted Assets) Consolidated 131,493 14.73 % 53,569 6.00 % N/A N/A Farmers & Merchants State Bank 107,006 12.04 % 53,323 6.00 % 71,098 8.00 % Tier 1 Leverage Capital (to Adjusted Total Assets) Consolidated 131,493 12.02 % 43,765 4.00 % N/A N/A Farmers & Merchants State Bank 107,006 9.92 % 43,148 4.00 % 53,935 5.00 % The following table presents the Company and the Bank’s actual and required capital amounts and ratios as of December 31, 2016. Actual Minimum Capital Required to Well-Capitalized (000’s) (000’s) (000’s) As of December 31, 2016 Amount Ratio Amount Ratio Amount Ratio Common Equity Tier 1 Capital (to Risk Weighted Assets) Consolidated $ 123,031 14.46 % $ 38,296 4.50 % N/A N/A Farmers & Merchants State Bank 100,999 11.91 % 38,156 4.50 % $ 55,115 6.50 % Total Risk-Based Capital (to Risk Weighted Assets) Consolidated 130,032 15.28 % 68,081 8.00 % N/A N/A Farmers & Merchants State Bank 108,000 12.73 % 67,833 8.00 % 84,792 10.00 % Tier 1 Capital (to Risk Weighted Assets) Consolidated 123,031 14.46 % 51,061 6.00 % N/A N/A Farmers & Merchants State Bank 100,999 11.91 % 50,875 6.00 % 67,833 8.00 % Tier 1 Leverage Capital (to Adjusted Total Assets) Consolidated 123,031 11.77 % 41,826 4.00 % N/A N/A Farmers & Merchants State Bank 100,999 9.75 % 41,425 4.00 % 51,181 5.00 % The above tables exclude the capital conservation buffer requirements.

Restrictions of Dividends & Int

Restrictions of Dividends & Inter-company Borrowings	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Restrictions of Dividends & Inter-company Borrowings	Note 16- Restrictions of Dividends & Inter-company Borrowings The Bank is restricted as to the amount of dividends that can be paid. Dividends declared by the Bank that exceed the net income for the current year plus retained income for the preceding two years must be approved by federal and state regulatory agencies. Under this formula dividends of $14.0 million may be paid without prior regulatory approval. Regardless of formal regulatory restrictions, the Bank may not pay dividends that would result in its capital levels being reduced below the minimum requirements shown above. Under current Federal Reserve regulations, the Bank is limited as to the amount and type of loans it may make to the Company. These loans are subject to qualifying collateral requirements on which the amount of the loan may be based.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 17 - Fair Value of Financial Instruments Fair values of financial instruments are management’s estimate of the values at which the instruments could be exchanged in a transaction between willing parties. These estimates are subjective and may vary significantly from amounts that would be realized in actual transactions. In addition, other significant assets are not considered financial assets including deferred tax assets, premises, equipment and intangibles. Further, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on the fair value estimates and have not been considered in any of the estimates. The following assumptions and methods were used in estimating the fair value for financial instruments: Cash and Cash Equivalents The carrying amounts reported in the balance sheet for cash, cash equivalents and federal funds sold approximate their fair values. Also included in this line item are the carrying amounts of interest-bearing deposits maturing within ninety days which approximate their fair values. Fair values of other interest- bearing deposits are estimated using discounted cash flow analyses based on current rates for similar types of deposits. Interest Bearing Time Deposits Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow analysis that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. S ecurities – Available-for-sale Fair values for securities, excluding Federal Home Loan Bank and Farmer Mac stock, are based on quoted market price, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments. Other Securities The carrying value of Federal Home Loan Bank and Farmer Mac stock, listed as “other securities,” approximates fair value based on the redemption provisions of the Federal Home Loan Bank. Loans Held for Sale The carrying amount approximates fair value due to insignificant amount of time between origination and date of sale. Loans, net For net variable-rate loans that re-price frequently, and with no significant change in credit risk, fair values are based on carrying values. The fair values of the fixed rate and all other loans are estimated using discounted cash flow analysis, using interest rates currently being offered for loans with similar terms to borrowers with similar credit quality. Deposits The fair values disclosed for deposits with no defined maturities are equal to their carrying amounts, which represent the amount payable on demand. The carrying amounts for variable-rate, fixed-term money market accounts and certificates of deposit approximate their fair value at the reporting date. Fair value for fixed-rate certificates of deposit are estimated using a discounted cash flow analysis that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Funds Purchased and Securities Sold Under Agreement to Repurchase The carrying value of Federal Funds purchased and securities sold under agreement to repurchase approximates fair values. FHLB Advances Fair values or FHLB advances are estimated using discounted cash flow analysis based on the Company’s current incremental borrowing rates for similar types or borrowing arrangements. Accrued Interest Receivable and Payable The carrying amounts of accrued interest approximate fair values. Off Balance Sheet Financial Instruments Fair values for off-balance-sheet, credit related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. The estimated fair values, and related carrying or notional amounts, for on and off-balance sheet financial instruments as of December 31, 2017 and 2016, are reflected below. The aggregate fair values in the table below do not represent the total market value of the Bank’s assets and liabilities. The table excludes the following: Bank Premises and Equipment, Goodwill, Mortgage Servicing Rights, Other Real Estate Owned, Other Assets, Other Liabilities and Accrued Expenses. (In Thousands) December 2017 December 2016 Carrying Fair Carrying Fair Amount Value Level 1 Level 2 Level 3 Amount Value Level 1 Level 2 Level 3 Financial Assets: Cash and Cash Equivalents $ 34,467 $ 34,467 $ 34,467 $ — $ — $ 28,322 $ 28,322 $ 28,322 $ — $ — Interest-bearing time deposits 4,018 4,009 — 4,009 — 1,915 1,918 — 1,918 — Securities—available for sale 196,398 196,398 20,978 173,992 1,428 218,527 218,527 24,775 192,334 1,418 Other Securities 3,717 3,717 — — 3,717 3,717 3,717 — — 3,717 Loans held for sale 1,221 1,221 — — 1,221 2,055 2,055 — — 2,055 Loans, net 816,156 819,193 — — 819,193 751,310 753,357 — — 753,357 Interest receivable 4,276 4,276 — — 4,276 3,880 3,880 — — 3,880 Financial Liabilities: Interest bearing Deposits $ 532,660 $ 532,660 $ — $ — $ 532,660 $ 456,983 $ 456,983 $ — $ — $ 456,983 Non-interest bearing Deposits 199,114 199,114 — 199,114 — 186,390 186,390 — 186,390 — Time Deposits 187,566 188,335 — — 188,335 198,830 199,658 — — 199,658 Total Deposits 919,340 920,109 — 199,114 720,995 842,203 843,031 — 186,390 656,641 Federal Funds purchased and Securities sold under agreement to repurchase 39,495 39,495 — — 39,495 70,324 70,324 — — 70,324 Federal Home Loan Bank advances 5,000 5,021 — — 5,021 10,000 10,041 — — 10,041 Interest payable 318 318 — — 318 256 256 — — 256 Dividends payable 1,193 1,193 — 1,193 — 1,053 1,053 — 1,053 — Fair Value Measurements The following table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2017 and 2016, and the valuation techniques used by the Company to determine those fair values. There were no changes to valuation techniques during 2017. In general, fair values determined by Level 1 inputs use quoted prices in active markets for identical assets or liabilities in active markets that the Company has the ability to access. Available-for-sale securities—When quoted prices are available in an active market, securities are valued using the quoted price and are classified as Level 1. The quoted prices are not adjusted. Fair values determined by Level 2 inputs use other inputs that are observable, either directly or indirectly. These Level 2 inputs include quoted prices for similar assets and liabilities in active markets, and other inputs such as interest rates and yield curves that are observable at commonly quoted intervals. Available-for-sale securities classified as Level 2 are valued using the prices obtained from an independent pricing service. The prices are not adjusted. Securities of obligations of state and political subdivisions are valued using a type of matrix, or grid, pricing in which securities are benchmarked against the treasury rate based on credit rating. Substantially all assumptions used by the independent pricing service are observable in the marketplace, can be derived from observable data, or are supported by observable levels at which transactions are executed in the marketplace. Level 3 inputs are unobservable inputs, including inputs that are available in situations where there is little, if any, market activity for the related asset or liability. The Bank holds two local municipals that the Bank evaluates based on the credit strength of the underlying project. The fair value is determined by valuing similar credit payment streams at similar rates. In instances where inputs used to measure fair value fall into different levels in the above fair value hierarchy, fair value measurements in their entirety are categorized based on the lowest level input that is significant to the valuation. The Company’s assessment of the significance of particular inputs to these fair value measurements requires judgment and considers factors specific to each asset. The following table summarizes financial assets measured at fair value on a recurring basis as of December 31, 2017 and December 31, 2016 segregated by level or the valuation inputs within the fair value hierarchy utilized to measure fair value. Assets and Liabilities Measured at Fair Value on a Recurring Basis (In Thousands) Quoted Prices in Significant Significant December 31, 2017 Assets (Level 1) (Level 2) (Level 3) Assets-(Securities Available for Sale) U.S. Treasury $ 20,978 $ — $ — U.S. Government agencies — 80,466 — Mortgage-backed securities- — 39,510 — State and local governments — 54,016 1,428 Total Securities Available for Sale $ 20,978 $ 173,992 $ 1,428 December 31, 2016 Quoted Prices in Significant Significant Assets-(Securities Available for Sale) U.S. Treasury $ 24,775 $ — $ — U.S. Government agencies — 82,474 — Mortgage-backed securities- — 48,461 — State and local governments — 61,399 1,418 Total Securities Available for Sale $ 24,775 $ 192,334 $ 1,418 Fair Value Measurements Using Significant Unobservable Inputs (Level 3) State and Local State and Local State and Local Balance at January 1, 2017 $ — $ 1,418 $ 1,418 Change in Market Value — 10 10 Purchases — — — Sales — — — Payments & Maturities — — — Balance at December 31, 2017 $ — $ 1,428 $ 1,428 (In Thousands) Fair Value Measurements Using Significant Unobservable Inputs (Level 3) State and Local State and Local State and Local Balance at January 1, 2016 $ 5,904 $ 1,448 $ 7,352 Change in Market Value (264 ) (30 ) (294 ) Purchases — — — Sales — — — Payments & Maturities (5,640 ) — (5,640 ) Balance at December 31, 2016 $ — $ 1,418 $ 1,418 Most of the Company’s available for sale securities, including any bonds issued by local municipalities, have CUSIP numbers or have similar characteristics of those in the municipal markets, making them marketable and comparable as Level 2. There have been no transfers between Levels 1, 2, and 3 during 2017 and 2016. The Company also has assets that, under certain conditions, are subject to measurement at fair value on a non-recurring basis. At December 31, 2017 and 2016, such assets consist primarily of collateral dependent impaired loans. Collateral dependent impaired loans categorized as Level 3 assets consist of non-homogeneous loans that are considered impaired. The Company estimates the fair value of the loans based on the present value of expected future cash flows using management’s best estimate of key assumptions. These assumptions include future payment ability, timing of payment streams, and estimated realizable values of available collateral (typically based on outside appraisals). At December 31, 2017 and 2016, collateral dependent impaired loans categorized as Level 3 were $1.6 and $1.7 million, respectively. The specific allocation for collateral dependent impaired loans was $106 thousand as of December 31, 2017 and $135 thousand as of December 31, 2016, respectively, which are accounted for in the allowance for loan losses (see Note 4). Other real estate is reported at the lower of either the fair value of the real estate, minus the estimated costs to sell the asset, or the cost of the asset. The determination of the fair value of the real estate relies primarily on appraisals from third parties. If the fair value of the real estate, minus the estimated costs to sell the asset, is less than the asset’s cost, the deficiency is recognized as a valuation allowance against the asset through a charge to expense. The valuation allowance is therefore increased or decreased, through charges or credits to expense, for changes in the asset’s fair value or estimated selling costs. The following table presents collateral dependent impaired loans and other real estate owned as recorded at fair value: Balance at Identical Observable Inputs Unobservable Inputs December 31, 2017 Assets (Level 1) (Level 2) (Level 3) Collateral dependent impaired loans $ 508 $ — $ — $ 508 Other real estate owned—residential 22 — — 22 Other real estate owned—commercial 266 — — 266 Assets Measured at Fair Value on a Nonrecurring Basis at December 31, 2016 ($ in Thousands) Balance at Quoted Prices in Significant Significant Collateral dependent impaired loans $ 576 $ — $ — $ 576 Other real estate owned—residential 144 — — 144 Other real estate owned—commercial— — — — — The following table presents quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements: Fair Value at Valuation Technique Unobservable Inputs Range State and local government $ 1,428 Discounted Cash Flow Credit strength of underlying project or entity / Discount rate 0-5%(3.68%) Collateral dependent impaired loans 508 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0-50%(17.28%) Other real estate owned - residential 22 Appraisals Discount to reflect current market 0-20%(2.22%) Other real estate owned - commercial 266 Appraisals Discount to reflect current market 0-20%(5.15%) Fair Value at Valuation Technique Unobservable Inputs Range State and local government $ 1,418 Discounted Cash Flow Credit strength of underlying project or entity / Discount rate 0-5%(3.92%) Collateral dependent impaired loans 576 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0-50%(18.92%) Other real estate owned - residential 144 Appraisals Discount to reflect current market 0-20%(.51%) Other real estate owned - commercial — Appraisals Discount to reflect current market 0-20% The Company also has other assets, which under certain conditions, are subject to measurement at fair value. These assets include loans held for sale, bank owned life insurance, and mortgage servicing rights. The Company estimated the fair values of these assets utilizing Level 3 inputs, including, the discounted present value of expected future cash flows. At December 31, 2017, the Company estimates that there is no impairment of these assets and therefore, no impairment charge to other expense was required to adjust these assets to their estimated fair values.

Condensed Financial Statements

Condensed Financial Statements of Parent Company	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Statements of Parent Company	Note 18 – Condensed Financial Statements of Parent Company Balance Sheets (In Thousands) 2017 2016 Assets Cash $ 277 $ 1,435 Related party receivables: Dividends & Accounts receivable from subsidiaries 2,038 1,842 Accrued interest receivable Municipals 110 63 Note receivable from Bank subsidiary — — Securities—Municipals 18,944 17,290 Certificate of Deposits 1,974 — Investment in subsidiaries 112,025 106,044 Total Assets $ 135,368 $ 126,674 Liabilities Accrued expenses $ 39 $ 44 Dividends payable 1,192 1,053 Total Liabilities 1,231 1,097 Stockholders’ Equity 134,137 125,577 Total Liabilities and Stockholders’ Equity $ 135,368 $ 126,674 Statements of Income and Comprehensive Income (In Thousands) 2017 2016 2015 Income Dividends from subsidiaries $ 6,850 $ 6,000 $ 6,220 Interest — — — Interest Municipals 313 272 219 Gain on sales of available-for-sale securities — — 124 Total Income 7,163 6,272 6,563 Operating Expenses 828 681 677 Income Before Income Taxes and Equity in Undistributed Earnings of Subsidiaries 6,335 5,591 5,886 Income Taxes (Benefit) (422 ) (238 ) (188 ) 6,757 5,829 6,074 Equity in undistributed earnings of Subsidiaries 5,963 5,835 4,266 Net Income 12,720 11,664 10,340 Other Comprehensive Income (Loss): Unrealized gains (losses) on securities 146 (2,184 ) (232 ) Comprehensive Income $ 12,866 $ 9,480 $ 10,108 Statements of Cash Flows (In Thousands) 2017 2016 2015 Cash Flows from Operating Activities Net income $ 12,720 $ 11,664 $ 10,340 Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities: Equity in undistributed net income (Distributions in excess earnings) of subsidiaries (5,963 ) (5,835 ) (4,266 ) Accretion & Amortization of Securities 206 179 152 Gain on Sale of Available for Sale Securities — — (124 ) Changes in Assets and Liabilities: Dividends receivable — — 475 Other Assets and Liabilities 199 355 156 Net Cash Provided by Operating Activities 7,162 6,363 6,733 Cash Flows from Investing Activities Activity in available for sale securities: Maturities, prepayments and calls 2,815 1,485 1,000 Sales — — 6,282 Purchases (4,482 ) (2,891 ) (8,784 ) Purchases of Certificates of Deposit (1,974 ) — — Net Cash used in Investing Activities (3,641 ) (1,406 ) (1,502 ) Cash Flows from Financing Activities Payment of dividends (4,443 ) (4,115 ) (3,943 ) Purchase of Treasury Stock (236 ) (194 ) (803 ) Net Cash Used in Financing Activities (4,679 ) (4,309 ) (4,746 ) Net Change in Cash and Cash Equivalents (1,158 ) 648 485 Cash and Cash Equivalents Beginning of year 1,435 787 302 Cash and Cash Equivalents End of year $ 277 $ 1,435 $ 787

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Note 19 – Quarterly Financial Data Quarterly Financial Data—UNAUDITED (000’s omitted except per share data) Quarter Ended in 2017 Mar 31 June 30 Sep 30 Dec 31 Summary of Income: Interest income $ 9,721 $ 10,124 $ 10,535 $ 10,868 Interest expense 1,179 1,253 1,333 1,362 Net Interest Income 8,542 8,871 9,202 9,506 Provision for loan loss 73 25 99 25 Net interest income after provision of loan loss 8,469 8,846 9,103 9,481 Other income (expense) (4,487 ) (4,325 ) (4,722 ) (4,462 ) Net income before income taxes 3,982 4,521 4,381 5,019 Income taxes 1,143 1,298 1,159 1,583 Net income $ 2,839 $ 3,223 $ 3,222 $ 3,436 Earnings per Common Share (1) $ 0.31 $ 0.35 $ 0.35 $ 0.37 Average common shares outstanding (1) 9,241,750 9,241,750 9,252,919 9,266,584 Quarter Ended in 2016 Mar 31 June 30 Sep 30 Dec 31 Summary of Income: Interest income $ 9,004 $ 9,387 $ 9,590 $ 9,746 Interest expense 996 1,047 1,099 1,081 Net Interest Income 8,008 8,340 8,491 8,665 Provision for loan loss 277 339 308 197 Net interest income after provision of loan loss 7,731 8,001 8,183 8,468 Other income (expense) (4,316 ) (3,773 ) (4,007 ) (3,967 ) Net income before income taxes 3,415 4,228 4,176 4,501 Income taxes 934 1,254 1,161 1,307 Net income $ 2,481 $ 2,974 $ 3,015 $ 3,194 Earnings per Common Share (1) $ 0.27 $ 0.32 $ 0.33 $ 0.35 Average common shares outstanding (1) 9,218,452 9,211,068 9,225,532 9,241,662 (1) Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations The Farmers & Merchants Bancorp, Inc. (the Company) through its bank subsidiary, The Farmers & Merchants State Bank (the Bank) provides a variety of financial services to individuals and small businesses through its offices in Northwest Ohio and Northeast Indiana.
Consolidation Policy	Consolidation Policy The consolidated financial statements include the accounts of Farmers & Merchants Bancorp, Inc. and its wholly-owned subsidiaries, The Farmers & Merchants State Bank (the Bank), a commercial banking institution and Farmers & Merchants Risk Management, Inc. (the Captive), a Captive insurance company. All significant inter-company balances and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses and the valuation of mortgage servicing rights, goodwill, available for sale investment securities, other real estate owned and impaired loans. Actual results could differ from those estimates. The determination of the adequacy of the allowance for loan losses is based on estimates that are particularly susceptible to significant changes in the economic environment and market conditions. In connection with the determination of the estimated losses on loans, management obtains independent appraisals for significant collateral. The Bank’s loans are generally secured by specific items of collateral including real property, consumer assets, and business assets. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent on local economic conditions in the agricultural industry. While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans may be necessary based on changes in local economic conditions. In addition regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies may require the Bank to recognize additional losses based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the estimated losses on loans may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the consolidated statement of cash flows, the Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. This includes cash on hand, amounts due from banks, and federal funds sold. Generally, federal funds are purchased for one day periods.
Restrictions on Cash and Amounts Due from Banks	Restrictions on Cash and Amounts Due from Banks The Bank is required to maintain average balances on hand with the Federal Reserve Bank. The aggregate reserve was $11.4 million for December 31, 2017 and it was $5.0 million for December 31, 2016. The Company and its subsidiaries maintain cash balances with high quality credit institutions. At times such balances may be in excess of the federally insured limits.
Securities	Securities Debt securities are classified as available-for-sale. Securities available-for-sale are carried at fair value with unrealized gains and losses reported in other comprehensive income (loss). Net realized gains and losses on securities available for sale are included in noninterest income (expense) and, when applicable, are reported as a reclassification adjustment, net of tax, in other comprehensive income (loss). Gains and losses on sales of securities are determined on the specific-identification method. Declines in the fair value of securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, management considers (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. The related write-downs are included in earnings as realized losses.
Other Securities	Other Securities Other Securities consists of Federal Home Loan Bank of Cincinnati stock and Farmer Mac stock. These stocks are carried at cost and are held to enable the Bank to conduct business with the entities. The Federal Home Loan Bank sells and purchases their stock at par. The Federal Home Loan Bank of Cincinnati stock is held as collateral security for all indebtedness of the Bank to the Federal Home Loan Bank. The Federal Home Loan Bank of Cincinnati is evaluated for impairment as conditions warrant.
Loans	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at the amount of unpaid principal, reduced by unearned discounts and deferred loan fees and costs, as well as, by the allowance for loan losses. Interest income is accrued on a daily basis based on the principal outstanding. Generally, a loan is classified as nonaccrual and the accrual of interest income is generally discontinued when a loan becomes ninety days past due as to principal or interest and these loans are placed on a “cash basis” for purposes of income recognition. Management may elect to continue the accrual of interest when the estimated net realizable value of collateral is sufficient to cover the principal and accrued interest, and the loan is in the process of collection. When a loan is placed on nonaccrual status, all previously accrued and unpaid interest receivable is charged against income. Loan origination and commitment fees and certain direct loan origination costs are deferred and amortized as a net adjustment to the related loan’s yield. The Bank is generally amortizing these costs over the contractual life of such loans.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is established through a provision for loan losses charged to income. Loans deemed to be uncollectable and changes in the allowance relating to loans are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is evaluated on a regular basis by management and is based on management’s periodic review of the collectability of the loans in light of historical experiences, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective, as it requires estimates that are subject to revision as more information becomes available. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are classified as doubtful, substandard or special mention. For such loans that are also classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers non-classified loans and is based on historical loss experience adjusted for qualitative factors. The unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. A loan is considered impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis for commercial and agricultural loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral dependent. At 90 days delinquent, secured consumer loans are charged down to the value of the collateral, if repossession of the collateral is assured and/or in the process of repossession. Consumer mortgage loan deficiencies are charged down upon the sale of the collateral or sooner upon the recognition of collateral deficiency. For the majority of the Bank’s impaired loans, the Bank will apply the fair value of collateral or use a measurement incorporating the present value of expected future cash flows discounted at the loan’s effective rate of interest. To determine fair value of collateral, collateral asset values securing an impaired loan are periodically evaluated. Maximum time of re-evaluation is every 12 months for chattels and titled vehicles and every two years for real estate. In this process, third party evaluations are obtained. Until such time that updated appraisals are received, the Bank may discount the collateral value used. Large groups of homogeneous loans are collectively evaluated for impairment. Accordingly, the Bank does not separately identify individual consumer loans for impairment, unless such loans are the subject of a restructuring agreement due to financial difficulties of the borrower. For more information regarding the actual composition and classification of loans involved in the establishment of the allowance for loan loss, please see Note 4 provided here with the notes to consolidated financial statements.
Loans Held for Sale	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Net unrealized losses, if any, are recognized in a valuation allowance by charges to income.
Servicing Assets	Servicing Assets Servicing assets are recognized as separate assets when rights are acquired through purchase or sale of financial assets. Capitalized servicing rights are amortized into noninterest expense in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights by predominant characteristics, such as interest rates and terms. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market based assumptions. Impairment is recognized through a valuation allowance for an individual stratum, to the extent that fair value is less than the capitalized amount for the stratum. Fees received for servicing loans owned by investors are based on a percentage of the outstanding monthly principal balance of such loans and are included in operating income as loan payments are received. Costs of servicing loans are charged to expense as incurred.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill results from business acquisitions and represents the excess of the purchase price over the fair value of acquired tangible assets and liabilities and identifiable intangible assets. Goodwill is assessed at least annually. If possible impairment is likely, the Bank will utilize the assistance of an independent third party for impairment and any such impairment is recognized in the period identified. Periodically the Bank will have an independent third party assess the possibility of impairment of Goodwill. Such an assessment was performed as of September 30, 2017. The goodwill impairment analysis consisted of a first step goodwill impairment test which was used to identify potential impairment by comparing the fair value of the relevant reporting unity with its carrying value, including goodwill. The analysis was performed under guidance of FASB ASC 350. The engagement would have expanded to the second step goodwill impairment valuation if necessary; however the findings showed the second step was not warranted. The analysis confirmed no impairment was likely. Therefore, the Bank concluded it is unlikely impairment of Goodwill has occurred from the goodwill established from the Bank’s acquisition which occurred on December 31, 2007. Other intangible assets consist of core deposit intangible assets arising from business acquisitions. They are initially measured at fair value and then are amortized on a straight line method over their estimated useful lives and evaluated for impairment. These assets are included in other assets on the consolidated balance sheets.
Off Balance Sheet Instruments	Off Balance Sheet Instruments In the ordinary course of business, the Bank has entered into commitments to extend credit, including commitments under credit card arrangements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded.
Foreclosed Real Estate	Foreclosed Real Estate Foreclosed real estate held for sale is carried at the lower of fair value minus estimated costs to sell, or cost. Costs of holding foreclosed real estate are charged to expense in the current period, except for significant property improvements, which are capitalized. Valuations are periodically performed by management and an allowance is established by a charge to non-interest expense if the carrying value exceeds the fair value minus the estimated costs to sell. Foreclosed real estate is classified as other real estate owned. The net loss from operations of foreclosed real estate held for sale is reported in non-interest expense. At December 31, the Bank’s holding of other real estate owned totaled $674 thousand and approximately $774 thousand for 2017 and 2016, respectively.
Bank Premises and Equipment	Bank Premises and Equipment Land is carried at cost. Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is based on the estimated useful lives of the various properties and is computed using straight line and accelerated methods. Costs for maintenance and repairs are charged to operations as incurred. Gains and losses on dispositions are included in current operations.
Federal Income Tax	Federal Income Tax The Company’s income tax expense consists of the following components: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management’s judgment. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in tax expense. Based on management’s analysis, the Company did not have any uncertain tax positions as of December 31, 2017 and 2016. With a few exceptions, the Company is no longer subject to U.S. Federal, state or local examinations by tax authorities for years before 2014.
Earnings Per Share	Earnings Per Share Basic earnings per share represent income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. On August 18, 2017, the Company’s Board of Directors authorized a two-for-one stock split payable on September 20, 2017, for shareholders of record on September 5, 2017. See Note 12 for additional information.
Stock-Based Compensation	Stock-Based Compensation The fair value of restricted common stock is their fair market value on the date of grant. The fair value of restricted stock is amortized as compensation expense on a straight-line basis over the vesting period of the grants. Compensation expense recognized is included in salaries and wages in the consolidated statements of income.
Treasury Stock	Treasury Stock Common stock shares repurchased are recorded at market value on date of purchase.
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the equity section of the balance sheet. Such items, along with net income, are components of other comprehensive income (loss). The components of other comprehensive income (loss) and related tax effects are as follows: (In Thousands) 2017 2016 2015 Net unrealized gain (loss) on available-for-sale securities $ 267 $ (2,721 ) $ 100 Reclassification adjustment for gain on sale of available-for-sale securities (47 ) (588 ) (451 ) Net unrealized gains (losses) 220 (3,309 ) (351 ) Tax expense (benefit) 74 (1,125 ) (119 ) Other comprehensive income (loss) $ 146 $ (2,184 ) $ (232 )
Reclassification	Reclassification Certain amounts in the 2016 and 2015 consolidated financial statements have been reclassified to conform with the 2017 presentation. These reclassifications had no effect on net income.
Subsequent Events	Subsequent Events On January 19, 2018, the Company announced the authorization by its Board of Directors for the Company’s repurchase, either on the open market, or in privately negotiated transactions, of up to 400,000 shares of its outstanding common stock commencing January 19, 2018 and ending December 31, 2018.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09 “Revenue from Contracts with Customers (Topic 606) i.e In January 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-01 “ Financial Instruments—Overall (Subtopic 825-10)—Recognition and Measurement of Financial Assets and Financial Liabilities.” requiring public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements; eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured and amortized at cost on the balance sheet; and requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the organization has elected to measure the liability at fair value in a accordance with the fair value option for financial instruments. ASU 2016-01 is effective for annual periods and interim periods within those annual periods, beginning after December 15, 2017. The amendments should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. The Company is assessing the impact of ASU 2016-01 on its accounting and disclosures. We will fully implement in first quarter 2018 as we work with third party vendors. In February 2016, the FASB issued ASU No. 2016-02 “ Leases (Topic 842).” In June 2016, FASB issued 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The ASU 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. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. Organizations will continue to use judgment to determine which loss estimation method is appropriate for their circumstances. The ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The ASU is effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (i.e., January 1, 2020, for calendar year entities). Early application will be permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently gathering information, reviewing possible vendors and has formed a committee to formulate the methodology to be used. Most importantly, the Company is gathering as much data as possible to enable review scenarios and determine which calculations will produce the most reliable results. At this time an additional external advisor has not been contracted, though the Bank has been reviewing the use of external software. In November 2016, the FASB issued ASU No. 2016-18 “ Statement of Cash Flows (Topic 230) – Restricted Cash.” December 15, 2017, and interim periods within those fiscal years and should be applied using a retrospective transition method to each period presented. Early adoption is permitted including adoption in an interim period. The Company has assessed ASU 2016-18 and does not expect a material impact on its accounting and disclosures as it currently does not have what would be considered “Restricted cash” at this time. In January 2017, the FASB issued ASU No. 2017-01 “ Business Combinations (Topic 805) – Clarifying the Definition of a Business.” In January 2017, the FASB issued ASU No. 2017-04 “Intangibles – Goodwill and other (Topic 350) – Simplifying the Test for Goodwill Impairment” In March 2017, the FASB issued Accounting Standards Update (ASU) No. 2017-08 “Receivables – Nonrefundable Fees and Other Cost (Subtopic 310-20), Premium Amortization on Purchased Callable Debit Securities.” In May 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-09 “ Compensation – Stock Compensation (Topic 718), Scope of Modification Accounting.” In December 2017, President Trump signed into law a tax reform act. Under the current accounting guidance in Accounting Standards Codification (ASC) 740, Income Taxes, the Company and its subsidiaries were required to account for the effect of the change in income tax rates and deferred balances in the period when the legislation is enacted which was December 2017. The adjustment of the deferred tax assets was less than $8 thousand on a consolidated basis. The Company is currently waiting to evaluate FASB’s possible accounting rule regarding treatment of the remaining stranded tax effects. The Company will choose to adopt such treatment as of January 1, 2018.

Summary of Significant Accoun28

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Components of Other Comprehensive Income (Loss) and Related Tax Effects	The components of other comprehensive income (loss) and related tax effects are as follows: (In Thousands) 2017 2016 2015 Net unrealized gain (loss) on available-for-sale securities $ 267 $ (2,721 ) $ 100 Reclassification adjustment for gain on sale of available-for-sale securities (47 ) (588 ) (451 ) Net unrealized gains (losses) 220 (3,309 ) (351 ) Tax expense (benefit) 74 (1,125 ) (119 ) Other comprehensive income (loss) $ 146 $ (2,184 ) $ (232 )

Business Combination & Asset 29

Business Combination & Asset Purchase (Tables)	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Amortization Expense of Core Deposit Intangible Assets	Amortization expense of the core deposit intangible assets remaining is as follows: Custar 2018 $ 167 2019 167 2020 161 Total $ 495

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Fair Value of Securities with Gross Unrealized Gains and Losses	The amortized cost and fair value of securities, with gross unrealized gains and losses, follows: (In Thousands) 2017 Amortized Gross Gross Fair Available-for-Sale: U.S. Treasury $ 21,219 $ — $ (241 ) $ 20,978 U.S. Government agencies 82,198 — (1,732 ) 80,466 Mortgage-backed securities 40,236 64 (790 ) 39,510 State and local governments 55,512 437 (505 ) 55,444 Total available-for-sale securities $ 199,165 $ 501 $ (3,268 ) $ 196,398 (In Thousands) 2016 Amortized Gross Gross Fair Available-for-Sale: U.S. Treasury $ 24,920 $ 1 $ (146 ) $ 24,775 U.S. Government agencies 84,266 3 (1,795 ) 82,474 Mortgage-backed securities 49,155 185 (879 ) 48,461 State and local governments 63,173 634 (990 ) 62,817 Total available-for-sale securities $ 221,514 $ 823 $ (3,810 ) $ 218,527
Gross Unrealized Losses, Aggregated by Investment Category and Length of Time	Information pertaining to securities with gross unrealized losses at December 31, 2017 and 2016, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows: 2017 (In Thousands) (In Thousands) Gross Fair Gross Fair Value U.S. Treasury $ (36 ) $ 6,924 $ (205 ) $ 14,054 U.S. Government agencies (314 ) 27,328 (1,418 ) 53,139 Mortgage-backed securities (70 ) 7,149 (720 ) 28,080 State and local governments (205 ) 24,999 (300 ) 11,567 Total available-for-sales securities $ (625 ) $ 66,400 $ (2,643 ) $ 106,840 2016 (In Thousands) (In Thousands) Gross Fair Value Gross Fair U.S. Treasury $ (146 ) $ 15,745 $ — $ — U.S. Government agencies (1,795 ) 77,471 — — Mortgage-backed securities (879 ) 36,474 — — State and local governments (983 ) 37,540 (7 ) 526 Total available-for-sales securities $ (3,803 ) $ 167,230 $ (7 ) $ 526
Gross Realized Gains and Losses	gross realized gains and losses for the years ended December 31, as presented below: (In Thousands) 2017 2016 2015 Gross realized gains $ 58 $ 598 $ 451 Gross realized losses (11 ) (10 ) — Net realized gains $ 47 $ 588 $ 451 Tax expense related to net realized gains $ 16 $ 200 $ 153
Amortized Cost and Fair Value of Debt Securities, by Contractual Maturity	The amortized cost and fair value of debt securities at December 31, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (In Thousands) Amortized Fair Value One year or less $ 21,644 $ 21,618 After one year through five years 84,514 83,685 After five years through ten years 49,908 48,810 After ten years 2,863 2,775 Total $ 158,929 $ 156,888 Mortgage-backed securities 40,236 39,510 Total $ 199,165 $ 196,398

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Loans	Loans at December 31 are summarized below: Loans: 2017 2016 Consumer Real Estate $ 83,620 $ 86,234 Agricultural Real Estate 64,073 62,375 Agricultural 95,111 84,563 Commercial Real Estate 410,520 377,481 Commercial and Industrial 126,275 109,256 Consumer 37,757 33,179 Industrial Development Bonds 6,415 5,732 $ 823,771 $ 758,820 Less: Net deferred loan fees and costs (747 ) (726 ) 823,024 758,094 Less: Allowance for loan losses (6,868 ) (6,784 ) Loans - Net $ 816,156 $ 751,310
Contractual Maturity Schedule by Major Category of Loans	The following is a maturity schedule by major category of loans at December 31, 2017: (In Thousands) Within After One After Total Consumer Real Estate $ 1,185 $ 13,979 $ 68,456 $ 83,620 Agricultural Real Estate 756 5,910 57,407 64,073 Agricultural 60,164 25,499 9,448 95,111 Commercial Real Estate 29,728 125,694 255,098 410,520 Commercial and Industrial 71,521 36,402 18,352 126,275 Consumer 5,634 23,946 8,177 37,757 Industrial Development Bonds 800 65 5,550 6,415 $ 169,788 $ 231,495 $ 422,488 $ 823,771
Distribution of Fixed Rate Loans and Variable Rate Loans by Major Loan Category	The distribution of fixed rate loans and variable rate loans by major loan category is as follows as of December 31, 2017: (In Thousands) Fixed Rate Variable Rate Consumer Real Estate $ 43,283 $ 40,337 Agricultural Real Estate 46,121 17,952 Agricultural 32,585 62,526 Commercial Real Estate 262,713 147,807 Commercial and Industrial 43,434 82,841 Consumer 32,869 4,888 Industrial Development Bonds 6,415 —
Contractual Aging of the Recorded Investment in Past Due Loans by Portfolio Classification of Loans	The following table represents the contractual aging of the recorded investment in past due loans by portfolio classification of loans as of December 31, 2017 and 2016, net of deferred loan fees and costs: December 31, 2017 30-59 Days 60-89 Days Greater Than Total Current Total Recorded Consumer Real Estate $ 565 $ 212 $ 113 $ 890 $ 82,310 $ 83,200 $ — Agricultural Real Estate — — 101 101 63,943 64,044 — Agricultural — — — — 95,238 95,238 — Commercial Real Estate — — 38 38 409,915 409,953 — Commercial and Industrial — 42 — 42 132,745 132,787 — Consumer 34 2 7 43 37,759 37,802 — Total $ 599 $ 256 $ 259 $ 1,114 $ 821,910 $ 823,024 $ — December 31, 2016 30-59 Days 60-89 Days Greater Than Total Past Current Total Recorded Investment Consumer Real Estate $ 882 $ 15 $ 507 $ 1,404 $ 84,469 $ 85,873 $ — Agricultural Real Estate 12 — 132 144 62,192 62,336 — Agricultural 101 — — 101 84,591 84,692 — Commercial Real Estate 60 — — 60 376,827 376,887 — Commercial and Industrial — — — — 115,093 115,093 — Consumer 29 6 — 35 33,178 33,213 — Total $ 1,084 $ 21 $ 639 $ 1,744 $ 756,350 $ 758,094 $ —
Recorded Investment in Nonaccrual Loans by Portfolio Class of Loans	The following table presents the recorded investment in nonaccrual loans by portfolio class of loans as of December 31, 2017 and December 31, 2016: (In Thousands) 2017 2016 Consumer Real Estate $ 708 $ 1,091 Agricultural Real Estate 101 132 Agriculture — — Commercial Real Estate 38 — Commercial and Industrial 149 161 Consumer 7 — Total $ 1,003 $ 1,384
Risk Category of Loans by Portfolio Class	The following table represents the risk category of loans by portfolio class, net of deferred fees, based on the most recent analysis performed as of the time periods shown of December 31, 2017 and December 31, 2016. (In Thousands) Agricultural Real Estate Agricultural Commercial Real Estate Commercial and Industrial Development 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 1-2 $ 4,143 $ 4,399 $ 6,558 $ 7,334 $ 1,244 $ 677 $ 9,205 $ 10,060 $ — $ — 3 15,244 16,660 37,267 31,397 32,498 27,858 15,277 14,064 3,489 2,640 4 43,416 39,808 51,312 44,560 359,600 333,523 99,581 83,100 2,926 3,092 5 1,125 1,209 101 1,234 7,758 8,321 1,381 1,379 — — 6 116 260 — 167 8,853 6,508 817 641 — — 7 — — — — — — 111 117 — — 8 — — — — — — — — — — Total $ 64,044 $ 62,336 $ 95,238 $ 84,692 $ 409,953 $ 376,887 $ 126,372 $ 109,361 $ 6,415 $ 5,732
Recorded Investment for Consumer Loans, Credit Quality based on Status of Loan and Payment Activity	The following tables present the recorded investment in those classes based on payment activity and assigned risk grading as of December 31, 2017 and December 31, 2016. (In Thousands) Consumer Real Estate 2017 2016 Grade Pass $ 82,632 $ 85,322 Special mention (5) — 25 Substandard (6) 488 368 Doubtful (7) 80 158 Total $ 83,200 $ 85,873 (In Thousands) Consumer - Consumer - Other 2017 2016 2017 2016 Performing $ 4,108 $ 4,061 $ 33,666 $ 29,120 Nonperforming — — 28 32 Total $ 4,108 $ 4,061 $ 33,694 $ 29,152
Schedule of Impaired Loans	Information about impaired loans as of and for the years ended December 31, 2017 and 2016 are as follows: (In Thousands) 2017 2016 Impaired loans without a valuation allowance $ 1,131 $ 1,141 Impaired loans with a valuation allowance 614 711 Total impaired loans $ 1,745 $ 1,852 Valuation allowance related to impaired loans $ 106 $ 135 Total non-accrual loans $ 1,003 $ 1,384 Total loans past-due ninety days or more and still accruing $ — $ — 2017 2016 2015 Average investment in impaired loans $ 1,885 $ 1,802 $ 2,509 Interest income recognized on impaired loans $ 57 $ 64 $ 96 Interest income recognized on a cash basis on impaired loans $ 23 $ 27 $ 60
Impaired Loans Classified as Troubled Debt Restructured	The following table represents the years ended December 31, 2017 and 2016. (In thousands) (In thousands) December 31, 2017 Troubled Debt Restructurings Number of Pre- Post- December 31, 2016 Troubled Debt Restructurings Number of Pre- Post- Commercial Real Estate 0 $ — $ — Commercial Real Estate 1 $ 138 $ 138 Commercial and Industrial 1 38 38 Commercial and Industrial 0 — —
Loans Individually Evaluated for Impairment by Portfolio Class of Loans	The following tables present loans individually evaluated for impairment by portfolio class of loans as of December 31, 2017 and 2016: (In Thousands) Recorded Unpaid Related Average Interest Interest 2017 With no related allowance recorded: Consumer Real Estate $ 495 $ 495 $ — $ 911 $ 30 $ 21 Agricultural Real Estate 101 101 — 123 — — Agricultural — — — 27 — — Commercial Real Estate 202 202 — 51 1 — Commercial and Industrial 333 333 — 85 2 — Consumer — — — — — — With a specific allowance recorded: Consumer Real Estate 80 80 21 88 — — Agricultural Real Estate — — — — — — Agricultural — — — — — — Commercial Real Estate 423 423 46 486 24 2 Commercial and Industrial 111 111 39 114 — — Consumer — — — — — — Totals: Consumer Real Estate $ 575 $ 575 $ 21 $ 999 $ 30 $ 21 Agricultural Real Estate $ 101 $ 101 $ — $ 123 $ — $ — Agricultural $ — $ — $ — $ 27 $ — $ — Commercial Real Estate $ 625 $ 625 $ 46 $ 537 $ 25 $ 2 Commercial and Industrial $ 444 $ 444 $ 39 $ 199 $ 2 $ — Consumer $ — $ — $ — $ — $ — $ — (In Thousands) Recorded Unpaid Related Average Interest Interest 2016 With no related allowance recorded: Consumer Real Estate $ 1,009 $ 1,009 $ — $ 101 $ 16 $ 4 Agricultural Real Estate 132 132 — 147 — — Agricultural — — — — — — Commercial Real Estate — — — 427 24 23 Commercial and Industrial — — — 337 — — Consumer — — — — — — With a specific allowance recorded: Consumer Real Estate 94 94 34 344 — — Agricultural Real Estate — — — 9 — — Agricultural — — — — — — Commercial Real Estate 501 501 66 191 — — Commercial and Industrial 116 116 35 246 24 — Consumer — — — — — — Totals: Consumer Real Estate $ 1,103 $ 1,103 $ 34 $ 445 $ 16 $ 4 Agricultural Real Estate $ 132 $ 132 $ — $ 156 $ — $ — Agricultural $ — $ — $ — $ — $ — $ — Commercial Real Estate $ 501 $ 501 $ 66 $ 618 $ 24 $ 23 Commercial and Industrial $ 116 $ 116 $ 35 $ 583 $ 24 $ — Consumer $ — $ — $ — $ — $ — $ —
Summary of Activities in Allowance for Credit Losses	The following is an analysis of the allowance for credit losses for the years ended December 31: (In Thousands) 2017 2016 2015 Allowance for Loan Losses Balance at beginning of year $ 6,784 $ 6,057 $ 5,905 Provision for loan loss 222 1,121 625 Loans charged off (288 ) (550 ) (1,030 ) Recoveries 150 156 557 Balance at ending of year $ 6,868 $ 6,784 $ 6,057 Allowance for Unfunded Loan Commitments & Letters of Credit $ 227 $ 217 $ 208 Total Allowance for Credit Losses $ 7,095 $ 7,001 $ 6,265
Analysis of Allowance for Credit Losses	Additional analysis related to the allowance for credit losses as of December 31, 2017 and 2016 is as follows: (In Thousands) Consumer Agricultural Agricultural Commercial Commercial Consumer Unfunded Loan Unallocated Total 2017 ALLOWANCE FOR CREDIT LOSSES: Beginning balance $ 316 $ 241 $ 616 $ 3,250 $ 1,318 $ 394 $ 217 $ 649 $ 7,001 Charge Offs (4 ) — — (21 ) — (263 ) — — (288 ) Recoveries 13 — 8 15 12 102 — — 150 Provision (Credit) 18 3 43 (95 ) 216 208 — (171 ) 222 Other Non-interest expense related to unfunded — — — — — — 10 — 10 Ending Balance $ 343 $ 244 $ 667 $ 3,149 $ 1,546 $ 441 $ 227 $ 478 $ 7,095 Ending balance: individually evaluated for impairment $ 21 $ — $ — $ 46 $ 39 $ — $ — $ — $ 106 Ending balance: collectively evaluated for impairment $ 322 $ 244 $ 667 $ 3,103 $ 1,507 $ 441 $ 227 $ 478 $ 6,989 Ending balance: loans acquired with deteriorated credit quality $ — $ — $ — $ — $ — $ — $ — $ — $ — FINANCING RECEIVABLES: Ending balance $ 83,200 $ 64,044 $ 95,238 $ 409,953 $ 132,787 $ 37,802 $ — $ — $ 823,024 Ending balance: individually evaluated for impairment $ 575 $ 101 $ — $ 625 $ 444 $ — $ — $ — $ 1,745 Ending balance: collectively evaluated for impairment $ 82,625 $ 63,943 $ 95,238 $ 409,328 $ 132,343 $ 37,802 $ — $ — $ 821,279 Ending balance: loans acquired with deteriorated credit quality $ 122 $ — $ — $ — $ — $ — $ — $ — $ 122 (In Thousands) Consumer Agricultural Agricultural Commercial Commercial Consumer Unfunded Loan Unallocated Total 2016 ALLOWANCE FOR CREDIT LOSSES: Beginning balance $ 338 $ 211 $ 582 $ 2,516 $ 1,229 $ 337 $ 208 $ 844 $ 6,265 Charge Offs (106 ) — (21 ) (93 ) (20 ) (310 ) — — (550 ) Recoveries 28 — 10 20 11 87 — — 156 Provision (Credit) 56 30 45 807 98 280 — (195 ) 1,121 Other Non-interest expense related to unfunded — — — — — — 9 — 9 Ending Balance $ 316 $ 241 $ 616 $ 3,250 $ 1,318 $ 394 $ 217 $ 649 $ 7,001 Ending balance: individually evaluated for impairment $ 34 $ — $ — $ 66 $ 35 $ — $ — $ — $ 135 Ending balance: collectively evaluated for impairment $ 282 $ 241 $ 616 $ 3,184 $ 1,283 $ 394 $ 217 $ 649 $ 6,866 Ending balance: loans acquired with deteriorated credit quality $ 1 $ — $ — $ — $ — $ — $ — $ — $ 1 FINANCING RECEIVABLES: Ending balance $ 85,873 $ 62,336 $ 84,692 $ 376,887 $ 115,093 $ 33,213 $ — $ — $ 758,094 Ending balance: individually evaluated for impairment $ 1,103 $ 132 $ — $ 501 $ 116 $ — $ — $ — $ 1,852 Ending balance: collectively evaluated for impairment $ 84,770 $ 62,204 $ 84,692 $ 376,386 $ 114,977 $ 33,213 $ — $ — $ 756,242 Ending balance: loans acquired with deteriorated credit quality $ 200 $ — $ — $ — $ — $ — $ — $ — $ 200

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Major Categories of Banking Premises and Equipment and Accumulated Depreciation	The major categories of banking premises and equipment and accumulated depreciation at December 31 are summarized below: (In Thousands) 2017 2016 Land $ 5,892 $ 5,647 Buildings (useful life 15-39 years) 23,977 23,526 Furnishings (useful life 3-15 years) 13,351 12,673 43,220 41,846 Less: Accumulated depreciation (21,603 ) (20,389 ) Premises and Equipment (Net) $ 21,617 $ 21,457

Servicing (Tables)

Servicing (Tables)	12 Months Ended
	Dec. 31, 2017
Transfers and Servicing [Abstract]
Summary of Mortgage Servicing Rights Capitalized and Amortized	The following summarizes mortgage servicing rights capitalized and amortized during each year: (In Thousands) 2017 2016 Beginning Year $ 2,192 $ 2,056 Capitalized Additions 460 555 Amortization (353 ) (419 ) Valuation Allowance — — End of Year $ 2,299 $ 2,192

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Time Deposits	Time deposits as of December 31 consist of the following: (In Thousands) 2017 2016 Time deposits under $250,000 $ 165,866 $ 179,387 Time deposits of $250,000 or more 21,700 19,443 $ 187,566 $ 198,830
Scheduled Maturities for Time Deposits	At December 31, 2017 the scheduled maturities for time deposits are as follows: (In Thousands) 2018 $ 83,734 2019 38,274 2020 25,787 2021 26,441 2022 12,701 Thereafter 629 $ 187,566

Federal Funds Purchased and S35

Federal Funds Purchased and Securities Sold Under Agreement to Repurchase (Tables)	12 Months Ended
	Dec. 31, 2017
Brokers and Dealers [Abstract]
Daily Securities under Agreement to Repurchase	The table below presents the daily securities sold under agreement to repurchase and the term repurchase agreements. It does not include the Bank’s Federal Funds purchased. Daily Securities Sold Under Agreement to Repurchase Amount Weighted Maximum Amount Approximate Approximate 2017 $ 6,145 1.19 % $ 14,929 $ 10,253 0.96 % 2016 $ 32,814 0.20 % $ 43,929 $ 39,928 0.10 % Term CD’s Sold Under Agreement to Repurchase Amount Weighted Maximum Amount Approximate Approximate 2017 $ 22,925 1.97 % $ 22,925 $ 21,172 1.81 % 2016 $ 20,510 1.96 % $ 20,510 $ 19,562 1.88 %
Schedule of Remaining Contractual Maturity in Repurchase Agreements	The table below shows the remaining contractual maturity in the repurchase agreements December 31, 2017. December 31, 2017 Remaining Contractual Maturity of the Agreements Overnight & Up to 30 30-90 Greater Than 90 days Total Federal funds Purchased $ 10,425 $ — $ — $ — $ 10,425 Repurchase Agreements US Treasury & agency securities 6,145 — — 22,925 29,070 Total $ 16,570 $ — $ — $ 22,925 $ 39,495

Federal Home Loan Bank Advanc36

Federal Home Loan Bank Advances (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Summary of Future Obligations of FHLB Advances	Future obligations of the advances are as follows at December 31, 2017: (In Thousands) 2018 $ 5,000

Federal Income Taxes (Tables)

Federal Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Components of Income Tax Expense (Benefit)	The components of income tax expense (benefit) for the years ended December 31 are as follows: (In Thousands) 2017 2016 2015 Current: Federal $ 5,162 $ 4,601 $ 3,941 Deferred: Federal 29 55 (122 ) Federal - impact of enacted changes in tax law (8 ) — — $ 5,183 $ 4,656 $ 3,819
Reconciliation of the Statutory Federal Income Tax Rate to the Effective Tax Rate	The following is a reconciliation of the statutory federal income tax rate to the effective tax rate: (In Thousands) 2017 2016 2015 Income tax at statutory rates $ 6,045 $ 5,521 $ 4,792 Decrease resulting from: Tax exempt interest (413 ) (468 ) (554 ) Adjustment of deferred taxes for enacted changes in tax law (8 ) — — Section 831 deduction (318 ) (351 ) (351 ) Change in other (123 ) (46 ) (68 ) $ 5,183 $ 4,656 $ 3,819
Components of Deferred Tax Assets and Liabilities	Deferred tax assets and liabilities at December 31 are comprised of the following: (In Thousands) 2017 2016 Deferred Tax Assets: Allowance for loan losses $ 1,464 $ 2,326 Other 399 553 Net unrealized gain on available- for-sale securities 581 1,016 Total deferred tax assets 2,444 3,895 Deferred Tax Liabilities: Accreted discounts on bonds 55 83 FHLB stock dividends 462 744 Mortgage servicing rights 490 752 Other 1,185 1,745 Net unrealized gain on available- for-sale securities — — Total deferred tax liabilities 2,192 3,324 Net Deferred Tax Asset $ 252 $ 571

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Activity of Restricted Stock Awards	The following table summarizes the activity of restricted stock awards adjusted for a 2-for-1 stock split on September 20, 2017 as of December 31: Year Ended December 31, 2017 2016 2015 Number of Weighted Number Weighted Number Weighted Beginning of period 86,300 14.10 77,990 12.46 66,780 11.39 Granted 32,000 27.79 32,300 16.01 32,000 13.18 Vested (24,870 ) 28.60 (22,444 ) 15.86 (20,590 ) 13.17 Forfeited (1,080 ) 37.06 (1,546 ) 15.77 (200 ) 13.04 Nonvested, end of period 92,350 19.17 86,300 14.10 77,990 12.46

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Calculation of Basic Earnings Per Share	The table below presents basic and diluted earnings per share for the years ended December 31, 2017, 2016, and 2015. Year Ended December 31, December 31, December 31, Earnings per share Net income $ 12,720 $ 11,664 $ 10,340 Less: distributed earnings allocated to participating securities (45 ) (37 ) (31 ) Less: undistributed earnings allocated to participating securities (77 ) (64 ) (47 ) Net earnings available to common shareholders $ 12,598 $ 11,563 $ 10,262 Weighted average common shares outstanding including participating securities 9,250,825 9,224,230 9,234,116 Less: average unvested restricted shares (1) (88,664 ) (79,964 ) (70,000 ) Weighted average common shares outstanding (1) 9,162,161 9,144,266 9,164,116 Basic and diluted earnings per share (1) $ 1.38 $ 1.27 $ 1.12 (1) Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Off Balance Sheet Activities (T

Off Balance Sheet Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Outstanding Financial Instruments Whose Contract Amounts Represent Credit Risk	At December 31, 2017 and 2016, the following financial instruments were outstanding whose contract amounts represent credit risk: (In Thousands) 2017 2016 Commitments to extend credit $ 237,774 $ 223,534 Credit card arrangements 20,184 18,316 Standby letters of credit 791 875

Minimum Regulatory Capital Re41

Minimum Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Summary of Bank's Actual and Required Capital Amounts and Ratios	The Company and the Bank’s actual and required capital amounts and ratios as of December 31, 2017 are as follows: Actual Minimum Capital Required to Well-Capitalized (000’s) (000’s) (000’s) As of December 31, 2017 Amount Ratio Amount Ratio Amount Ratio Common Equity Tier 1 Capital (to Risk Weighted Assets) Consolidated $ 131,493 14.73 % $ 40,177 4.50 % N/A N/A Farmers & Merchants State Bank 107,006 12.04 % 39,992 4.50 % $ 57,767 6.50 % Total Risk-Based Capital (to Risk Weighted Assets) Consolidated 138,588 15.52 % 71,426 8.00 % N/A N/A Farmers & Merchants State Bank 114,101 12.84 % 71,098 8.00 % 88,872 10.00 % Tier 1 Capital (to Risk Weighted Assets) Consolidated 131,493 14.73 % 53,569 6.00 % N/A N/A Farmers & Merchants State Bank 107,006 12.04 % 53,323 6.00 % 71,098 8.00 % Tier 1 Leverage Capital (to Adjusted Total Assets) Consolidated 131,493 12.02 % 43,765 4.00 % N/A N/A Farmers & Merchants State Bank 107,006 9.92 % 43,148 4.00 % 53,935 5.00 % The following table presents the Company and the Bank’s actual and required capital amounts and ratios as of December 31, 2016. Actual Minimum Capital Required to Well-Capitalized (000’s) (000’s) (000’s) As of December 31, 2016 Amount Ratio Amount Ratio Amount Ratio Common Equity Tier 1 Capital (to Risk Weighted Assets) Consolidated $ 123,031 14.46 % $ 38,296 4.50 % N/A N/A Farmers & Merchants State Bank 100,999 11.91 % 38,156 4.50 % $ 55,115 6.50 % Total Risk-Based Capital (to Risk Weighted Assets) Consolidated 130,032 15.28 % 68,081 8.00 % N/A N/A Farmers & Merchants State Bank 108,000 12.73 % 67,833 8.00 % 84,792 10.00 % Tier 1 Capital (to Risk Weighted Assets) Consolidated 123,031 14.46 % 51,061 6.00 % N/A N/A Farmers & Merchants State Bank 100,999 11.91 % 50,875 6.00 % 67,833 8.00 % Tier 1 Leverage Capital (to Adjusted Total Assets) Consolidated 123,031 11.77 % 41,826 4.00 % N/A N/A Farmers & Merchants State Bank 100,999 9.75 % 41,425 4.00 % 51,181 5.00 %

Fair Value of Financial Instr42

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Estimated Fair Values and Related Carrying or Notional Amounts	The estimated fair values, and related carrying or notional amounts, for on and off-balance sheet financial instruments as of December 31, 2017 and 2016, are reflected below. (In Thousands) December 2017 December 2016 Carrying Fair Carrying Fair Amount Value Level 1 Level 2 Level 3 Amount Value Level 1 Level 2 Level 3 Financial Assets: Cash and Cash Equivalents $ 34,467 $ 34,467 $ 34,467 $ — $ — $ 28,322 $ 28,322 $ 28,322 $ — $ — Interest-bearing time deposits 4,018 4,009 — 4,009 — 1,915 1,918 — 1,918 — Securities—available for sale 196,398 196,398 20,978 173,992 1,428 218,527 218,527 24,775 192,334 1,418 Other Securities 3,717 3,717 — — 3,717 3,717 3,717 — — 3,717 Loans held for sale 1,221 1,221 — — 1,221 2,055 2,055 — — 2,055 Loans, net 816,156 819,193 — — 819,193 751,310 753,357 — — 753,357 Interest receivable 4,276 4,276 — — 4,276 3,880 3,880 — — 3,880 Financial Liabilities: Interest bearing Deposits $ 532,660 $ 532,660 $ — $ — $ 532,660 $ 456,983 $ 456,983 $ — $ — $ 456,983 Non-interest bearing Deposits 199,114 199,114 — 199,114 — 186,390 186,390 — 186,390 — Time Deposits 187,566 188,335 — — 188,335 198,830 199,658 — — 199,658 Total Deposits 919,340 920,109 — 199,114 720,995 842,203 843,031 — 186,390 656,641 Federal Funds purchased and Securities sold under agreement to repurchase 39,495 39,495 — — 39,495 70,324 70,324 — — 70,324 Federal Home Loan Bank advances 5,000 5,021 — — 5,021 10,000 10,041 — — 10,041 Interest payable 318 318 — — 318 256 256 — — 256 Dividends payable 1,193 1,193 — 1,193 — 1,053 1,053 — 1,053 —
Financial Assets Measured at Fair Value on Recurring Basis	The following table summarizes financial assets measured at fair value on a recurring basis as of December 31, 2017 and December 31, 2016 segregated by level or the valuation inputs within the fair value hierarchy utilized to measure fair value. Assets and Liabilities Measured at Fair Value on a Recurring Basis (In Thousands) Quoted Prices in Significant Significant December 31, 2017 Assets (Level 1) (Level 2) (Level 3) Assets-(Securities Available for Sale) U.S. Treasury $ 20,978 $ — $ — U.S. Government agencies — 80,466 — Mortgage-backed securities- — 39,510 — State and local governments — 54,016 1,428 Total Securities Available for Sale $ 20,978 $ 173,992 $ 1,428 December 31, 2016 Quoted Prices in Significant Significant Assets-(Securities Available for Sale) U.S. Treasury $ 24,775 $ — $ — U.S. Government agencies — 82,474 — Mortgage-backed securities- — 48,461 — State and local governments — 61,399 1,418 Total Securities Available for Sale $ 24,775 $ 192,334 $ 1,418
Changes in the Level 3 Fair-Value Category of Which Unobservable Inputs	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) State and Local State and Local State and Local Balance at January 1, 2017 $ — $ 1,418 $ 1,418 Change in Market Value — 10 10 Purchases — — — Sales — — — Payments & Maturities — — — Balance at December 31, 2017 $ — $ 1,428 $ 1,428 (In Thousands) Fair Value Measurements Using Significant Unobservable Inputs (Level 3) State and Local State and Local State and Local Balance at January 1, 2016 $ 5,904 $ 1,448 $ 7,352 Change in Market Value (264 ) (30 ) (294 ) Purchases — — — Sales — — — Payments & Maturities (5,640 ) — (5,640 ) Balance at December 31, 2016 $ — $ 1,418 $ 1,418
Collateral Dependent Impaired Loans and Other Real Estate	The following table presents collateral dependent impaired loans and other real estate owned as recorded at fair value: Balance at Identical Observable Inputs Unobservable Inputs December 31, 2017 Assets (Level 1) (Level 2) (Level 3) Collateral dependent impaired loans $ 508 $ — $ — $ 508 Other real estate owned—residential 22 — — 22 Other real estate owned—commercial 266 — — 266 Assets Measured at Fair Value on a Nonrecurring Basis at December 31, 2016 ($ in Thousands) Balance at Quoted Prices in Significant Significant Collateral dependent impaired loans $ 576 $ — $ — $ 576 Other real estate owned—residential 144 — — 144 Other real estate owned—commercial— — — — —
Quantitative Information about Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements	The following table presents quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements: Fair Value at Valuation Technique Unobservable Inputs Range State and local government $ 1,428 Discounted Cash Flow Credit strength of underlying project or entity / Discount rate 0-5%(3.68%) Collateral dependent impaired loans 508 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0-50%(17.28%) Other real estate owned - residential 22 Appraisals Discount to reflect current market 0-20%(2.22%) Other real estate owned - commercial 266 Appraisals Discount to reflect current market 0-20%(5.15%) Fair Value at Valuation Technique Unobservable Inputs Range State and local government $ 1,418 Discounted Cash Flow Credit strength of underlying project or entity / Discount rate 0-5%(3.92%) Collateral dependent impaired loans 576 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0-50%(18.92%) Other real estate owned - residential 144 Appraisals Discount to reflect current market 0-20%(.51%) Other real estate owned - commercial — Appraisals Discount to reflect current market 0-20%

Condensed Financial Statement43

Condensed Financial Statements of Parent Company (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of Condensed Balance Sheets	Balance Sheets (In Thousands) 2017 2016 Assets Cash $ 277 $ 1,435 Related party receivables: Dividends & Accounts receivable from subsidiaries 2,038 1,842 Accrued interest receivable Municipals 110 63 Note receivable from Bank subsidiary — — Securities—Municipals 18,944 17,290 Certificate of Deposits 1,974 — Investment in subsidiaries 112,025 106,044 Total Assets $ 135,368 $ 126,674 Liabilities Accrued expenses $ 39 $ 44 Dividends payable 1,192 1,053 Total Liabilities 1,231 1,097 Stockholders’ Equity 134,137 125,577 Total Liabilities and Stockholders’ Equity $ 135,368 $ 126,674
Schedule of Condensed Income and Comprehensive Income Statements	Statements of Income and Comprehensive Income (In Thousands) 2017 2016 2015 Income Dividends from subsidiaries $ 6,850 $ 6,000 $ 6,220 Interest — — — Interest Municipals 313 272 219 Gain on sales of available-for-sale securities — — 124 Total Income 7,163 6,272 6,563 Operating Expenses 828 681 677 Income Before Income Taxes and Equity in Undistributed Earnings of Subsidiaries 6,335 5,591 5,886 Income Taxes (Benefit) (422 ) (238 ) (188 ) 6,757 5,829 6,074 Equity in undistributed earnings of Subsidiaries 5,963 5,835 4,266 Net Income 12,720 11,664 10,340 Other Comprehensive Income (Loss): Unrealized gains (losses) on securities 146 (2,184 ) (232 ) Comprehensive Income $ 12,866 $ 9,480 $ 10,108
Schedule of Condensed Cash Flow Statement	Statements of Cash Flows (In Thousands) 2017 2016 2015 Cash Flows from Operating Activities Net income $ 12,720 $ 11,664 $ 10,340 Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities: Equity in undistributed net income (Distributions in excess earnings) of subsidiaries (5,963 ) (5,835 ) (4,266 ) Accretion & Amortization of Securities 206 179 152 Gain on Sale of Available for Sale Securities — — (124 ) Changes in Assets and Liabilities: Dividends receivable — — 475 Other Assets and Liabilities 199 355 156 Net Cash Provided by Operating Activities 7,162 6,363 6,733 Cash Flows from Investing Activities Activity in available for sale securities: Maturities, prepayments and calls 2,815 1,485 1,000 Sales — — 6,282 Purchases (4,482 ) (2,891 ) (8,784 ) Purchases of Certificates of Deposit (1,974 ) — — Net Cash used in Investing Activities (3,641 ) (1,406 ) (1,502 ) Cash Flows from Financing Activities Payment of dividends (4,443 ) (4,115 ) (3,943 ) Purchase of Treasury Stock (236 ) (194 ) (803 ) Net Cash Used in Financing Activities (4,679 ) (4,309 ) (4,746 ) Net Change in Cash and Cash Equivalents (1,158 ) 648 485 Cash and Cash Equivalents Beginning of year 1,435 787 302 Cash and Cash Equivalents End of year $ 277 $ 1,435 $ 787

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Data	(000’s omitted except per share data) Quarter Ended in 2017 Mar 31 June 30 Sep 30 Dec 31 Summary of Income: Interest income $ 9,721 $ 10,124 $ 10,535 $ 10,868 Interest expense 1,179 1,253 1,333 1,362 Net Interest Income 8,542 8,871 9,202 9,506 Provision for loan loss 73 25 99 25 Net interest income after provision of loan loss 8,469 8,846 9,103 9,481 Other income (expense) (4,487 ) (4,325 ) (4,722 ) (4,462 ) Net income before income taxes 3,982 4,521 4,381 5,019 Income taxes 1,143 1,298 1,159 1,583 Net income $ 2,839 $ 3,223 $ 3,222 $ 3,436 Earnings per Common Share (1) $ 0.31 $ 0.35 $ 0.35 $ 0.37 Average common shares outstanding (1) 9,241,750 9,241,750 9,252,919 9,266,584 Quarter Ended in 2016 Mar 31 June 30 Sep 30 Dec 31 Summary of Income: Interest income $ 9,004 $ 9,387 $ 9,590 $ 9,746 Interest expense 996 1,047 1,099 1,081 Net Interest Income 8,008 8,340 8,491 8,665 Provision for loan loss 277 339 308 197 Net interest income after provision of loan loss 7,731 8,001 8,183 8,468 Other income (expense) (4,316 ) (3,773 ) (4,007 ) (3,967 ) Net income before income taxes 3,415 4,228 4,176 4,501 Income taxes 934 1,254 1,161 1,307 Net income $ 2,481 $ 2,974 $ 3,015 $ 3,194 Earnings per Common Share (1) $ 0.27 $ 0.32 $ 0.33 $ 0.35 Average common shares outstanding (1) 9,218,452 9,211,068 9,225,532 9,241,662 (1) Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Summary of Significant Accoun45

Summary of Significant Accounting Policies - Additional Information (Detail)	Dec. 31, 2017USD ($)	Sep. 20, 2017	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)	Jan. 19, 2018shares	Dec. 31, 2016USD ($)
Summary Of Significant Accounting Policies [Line Items]
Period for federal funds purchased and sold				1 day
Average aggregate reserve	$ 11,400,000			$ 11,400,000		$ 5,000,000
Loan non-accrual classification period				90 days
Days to charged consumer loans to the value of the collateral				90 days
Maximum time for re-evaluation (in months)				12 months
Re-evaluation period for real estate				2 years
Other real estate owned	674,000			$ 674,000		$ 774,000
Percentage of likelihood of realization of recognized tax benefit, minimum				50.00%
Share stock split ratio		2
Amount of reclassification effect				$ 0
Accelerated amortization expense adjustment			$ 30,000
Adjustment of deferred tax assets				$ (8,000)
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | shares					400,000
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Maturity period of cash equivalents				3 months
Adjustment of deferred tax assets	$ 8,000

Summary of Significant Accoun46

Summary of Significant Accounting Policies - Components of Other Comprehensive Income (Loss) and Related Tax Effects (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract]
Net unrealized gain (loss) on available-for-sale securities	$ 267	$ (2,721)	$ 100
Reclassification adjustment for gain on sale of available-for-sale securities	(47)	(588)	(451)
Net unrealized gain (loss) on available-for-sale securities	220	(3,309)	(351)
Tax expense (benefit)	74	(1,125)	(119)
Other comprehensive income (loss)	$ 146	$ (2,184)	$ (232)

Business Combination & Asset 47

Business Combination & Asset Purchase - Additional Information (Detail) - USD ($) $ in Thousands	Jul. 09, 2010	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 13, 2013
Business Acquisition [Line Items]
Number of years amortized over an estimated remaining economic useful life of deposits		7 years
Amortization expense		$ 245	$ 323	$ 323
Core Deposits [Member]
Business Acquisition [Line Items]
Recognition of core deposit intangible asset with acquired purchase		$ 2,260
Hicksville [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Recognition of core deposit intangible asset with acquired purchase	$ 1,090
Custar [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Recognition of core deposit intangible asset with acquired purchase					$ 1,170

Business Combination & Asset 48

Business Combination & Asset Purchase - Amortization Expense of Core Deposit Intangible Assets (Detail) - Custar [Member] $ in Thousands	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
2,018	$ 167
2,019	167
2,020	161
Total	$ 495

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities with Gross Unrealized Gains and Losses (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 199,165	$ 221,514
Gross Unrealized Gains	501	823
Gross Unrealized Losses	(3,268)	(3,810)
Fair Value	196,398	218,527
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	21,219	24,920
Gross Unrealized Gains		1
Gross Unrealized Losses	(241)	(146)
Fair Value	20,978	24,775
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	82,198	84,266
Gross Unrealized Gains		3
Gross Unrealized Losses	(1,732)	(1,795)
Fair Value	80,466	82,474
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,236	49,155
Gross Unrealized Gains	64	185
Gross Unrealized Losses	(790)	(879)
Fair Value	39,510	48,461
State and Local Governments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	55,512	63,173
Gross Unrealized Gains	437	634
Gross Unrealized Losses	(505)	(990)
Fair Value	$ 55,444	$ 62,817

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Realized gains and losses on sales	$ 13.6	$ 85.7	$ 47
Investments with a carrying value	$ 82.9	$ 129.4
Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Underwater security	10 years
Loss position existed	3 years

Securities - Gross Unrealized L

Securities - Gross Unrealized Losses, Aggregated by Investment Category and Length of Time (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ (625)	$ (3,803)
Fair Value, Less Than Twelve Months	66,400	167,230
Gross Unrealized Losses, Twelve Months and Over	(2,643)	(7)
Fair Value, Twelve Months and Over	106,840	526
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(36)	(146)
Fair Value, Less Than Twelve Months	6,924	15,745
Gross Unrealized Losses, Twelve Months and Over	(205)
Fair Value, Twelve Months and Over	14,054
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(314)	(1,795)
Fair Value, Less Than Twelve Months	27,328	77,471
Gross Unrealized Losses, Twelve Months and Over	(1,418)
Fair Value, Twelve Months and Over	53,139
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(70)	(879)
Fair Value, Less Than Twelve Months	7,149	36,474
Gross Unrealized Losses, Twelve Months and Over	(720)
Fair Value, Twelve Months and Over	28,080
State and Local Governments [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(205)	(983)
Fair Value, Less Than Twelve Months	24,999	37,540
Gross Unrealized Losses, Twelve Months and Over	(300)	(7)
Fair Value, Twelve Months and Over	$ 11,567	$ 526

Securities - Gross Realized Gai

Securities - Gross Realized Gains and Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]
Gross realized gains	$ 58	$ 598	$ 451
Gross realized losses	(11)	(10)
Net realized gains	47	588	451
Tax expense related to net realized gains	$ 16	$ 200	$ 153

Securities - Amortized Cost a53

Securities - Amortized Cost and Fair Value of Debt Securities, by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost, One year or less	$ 21,644
Amortized Cost, After one year through five years	84,514
Amortized Cost, After five years through ten years	49,908
Amortized Cost, After ten years	2,863
Amortized Cost, Total	158,929
Amortized Cost, Mortgage-backed securities	40,236
Amortized Cost	199,165	$ 221,514
Fair Value, One year or less	21,618
Fair Value, After one year through five years	83,685
Fair Value, After five years through ten years	48,810
Fair Value, After ten years	2,775
Fair Value, Total	156,888
Fair Value, Mortgage-backed securities	39,510
Total, Fair Value	$ 196,398	$ 218,527

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Loans held for sale	$ 1,221	$ 2,055

Loans - Loans (Detail)

Loans - Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans:
Loans - Gross	$ 823,771	$ 758,820
Less: Net deferred loan fees and costs	(747)	(726)
Loans after net deferred loan fees and costs	823,024	758,094
Less: Allowance for loan losses	(6,868)	(6,784)	$ (6,057)	$ (5,905)
Loans-Net	816,156	751,310
Agricultural Real Estate [Member]
Loans:
Loans - Gross	64,073	62,375
Loans after net deferred loan fees and costs	64,044	62,336
Agricultural [Member]
Loans:
Loans - Gross	95,111	84,563
Loans after net deferred loan fees and costs	95,238	84,692
Industrial Development Bonds [Member]
Loans:
Loans - Gross	6,415	5,732
Loans after net deferred loan fees and costs	6,415	5,732
Consumer Real Estate [Member]
Loans:
Loans - Gross	83,620	86,234
Loans after net deferred loan fees and costs	83,200	85,873
Commercial Real Estate [Member]
Loans:
Loans - Gross	410,520	377,481
Loans after net deferred loan fees and costs	409,953	376,887
Consumer [Member]
Loans:
Loans - Gross	37,757	33,179
Loans after net deferred loan fees and costs	37,802	33,213
Commercial and Industrial [Member]
Loans:
Loans - Gross	126,275	109,256
Loans after net deferred loan fees and costs	$ 126,372	$ 109,361

Loans - Contractual Maturity Sc

Loans - Contractual Maturity Schedule by Major Category of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	$ 823,771	$ 758,820
Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	64,073	62,375
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	95,111	84,563
Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	6,415	5,732
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	83,620	86,234
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	410,520	377,481
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	37,757	33,179
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	126,275	$ 109,256
Major Category Of Receivables Due Within One Year [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	169,788
Major Category Of Receivables Due Within One Year [Member] | Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	756
Major Category Of Receivables Due Within One Year [Member] | Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	60,164
Major Category Of Receivables Due Within One Year [Member] | Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	800
Major Category Of Receivables Due Within One Year [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	1,185
Major Category Of Receivables Due Within One Year [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	29,728
Major Category Of Receivables Due Within One Year [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	5,634
Major Category Of Receivables Due Within One Year [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	71,521
Major Category Of Receivables Due Within One Year to Five Years [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	231,495
Major Category Of Receivables Due Within One Year to Five Years [Member] | Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	5,910
Major Category Of Receivables Due Within One Year to Five Years [Member] | Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	25,499
Major Category Of Receivables Due Within One Year to Five Years [Member] | Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	65
Major Category Of Receivables Due Within One Year to Five Years [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	13,979
Major Category Of Receivables Due Within One Year to Five Years [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	125,694
Major Category Of Receivables Due Within One Year to Five Years [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	23,946
Major Category Of Receivables Due Within One Year to Five Years [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	36,402
Major Category Of Receivables Over Five Years [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	422,488
Major Category Of Receivables Over Five Years [Member] | Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	57,407
Major Category Of Receivables Over Five Years [Member] | Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	9,448
Major Category Of Receivables Over Five Years [Member] | Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	5,550
Major Category Of Receivables Over Five Years [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	68,456
Major Category Of Receivables Over Five Years [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	255,098
Major Category Of Receivables Over Five Years [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	8,177
Major Category Of Receivables Over Five Years [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans - Gross	$ 18,352

Loans - Distribution of Fixed R

Loans - Distribution of Fixed Rate Loans and Variable Rate Loans by Major Loan Category (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	$ 46,121
Distribution of variable rate loans by major loan category, Variable Rate	17,952
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	32,585
Distribution of variable rate loans by major loan category, Variable Rate	62,526
Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	6,415
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	43,283
Distribution of variable rate loans by major loan category, Variable Rate	40,337
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	262,713
Distribution of variable rate loans by major loan category, Variable Rate	147,807
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	32,869
Distribution of variable rate loans by major loan category, Variable Rate	4,888
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Distribution of fixed rate loans by major loan category, Fixed Rate	43,434
Distribution of variable rate loans by major loan category, Variable Rate	$ 82,841

Loans - Contractual Aging of Re

Loans - Contractual Aging of Recorded Investment in Past Due Loans by Portfolio Classification of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 1,114	$ 1,744
Current	821,910	756,350
Loans after net deferred loan fees and costs	823,024	758,094
Recorded Investment > 90 Days and Accruing	0	0	$ 0
Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	101	144
Current	63,943	62,192
Loans after net deferred loan fees and costs	64,044	62,336
Recorded Investment > 90 Days and Accruing	0	0
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		101
Current	95,238	84,591
Loans after net deferred loan fees and costs	95,238	84,692
Recorded Investment > 90 Days and Accruing	0	0
Commercial And Industrial and Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	42
Current	132,745	115,093
Loans after net deferred loan fees and costs	132,787	115,093
Recorded Investment > 90 Days and Accruing	0	0
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	890	1,404
Current	82,310	84,469
Loans after net deferred loan fees and costs	83,200	85,873
Recorded Investment > 90 Days and Accruing	0	0
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	38	60
Current	409,915	376,827
Loans after net deferred loan fees and costs	409,953	376,887
Recorded Investment > 90 Days and Accruing	0	0
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	43	35
Current	37,759	33,178
Loans after net deferred loan fees and costs	37,802	33,213
Recorded Investment > 90 Days and Accruing	0	0
30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	599	1,084
30 to 59 Days Past Due [Member] | Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		12
30 to 59 Days Past Due [Member] | Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		101
30 to 59 Days Past Due [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	565	882
30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		60
30 to 59 Days Past Due [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	34	29
60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	256	21
60 to 89 Days Past Due [Member] | Commercial And Industrial and Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	42
60 to 89 Days Past Due [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	212	15
60 to 89 Days Past Due [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2	6
Greater Than 90 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	259	639
Greater Than 90 Days [Member] | Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	101	132
Greater Than 90 Days [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	113	$ 507
Greater Than 90 Days [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	38
Greater Than 90 Days [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 7

Loans - Recorded Investment in

Loans - Recorded Investment in Nonaccrual Loans by Portfolio Class of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in nonaccrual loans	$ 1,003	$ 1,384
Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in nonaccrual loans	101	132
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in nonaccrual loans	708	1,091
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in nonaccrual loans	38
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in nonaccrual loans	7
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in nonaccrual loans	$ 149	$ 161

Loans (Tier Risk Rating System)

Loans (Tier Risk Rating System) - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment period of loan with a reasonable reduction of principal balance		2 years
3 [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Leverage position		2.00%
Good [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Leverage position	1.50%

Loans - Risk Category of Loans

Loans - Risk Category of Loans by Portfolio Class (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	$ 823,024	$ 758,094
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	126,372	109,361
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	409,953	376,887
1-2 [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	9,205	10,060
1-2 [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	1,244	677
3 [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	15,277	14,064
3 [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	32,498	27,858
4 [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	99,581	83,100
4 [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	359,600	333,523
5 [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	1,381	1,379
5 [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	7,758	8,321
6 [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	817	641
6 [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	8,853	6,508
7 [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	111	117
Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	64,044	62,336
Agricultural Real Estate [Member] | 1-2 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	4,143	4,399
Agricultural Real Estate [Member] | 3 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	15,244	16,660
Agricultural Real Estate [Member] | 4 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	43,416	39,808
Agricultural Real Estate [Member] | 5 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	1,125	1,209
Agricultural Real Estate [Member] | 6 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	116	260
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	95,238	84,692
Agricultural [Member] | 1-2 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	6,558	7,334
Agricultural [Member] | 3 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	37,267	31,397
Agricultural [Member] | 4 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	51,312	44,560
Agricultural [Member] | 5 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	101	1,234
Agricultural [Member] | 6 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs		167
Industrial Development Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	6,415	5,732
Industrial Development Bonds [Member] | 3 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	3,489	2,640
Industrial Development Bonds [Member] | 4 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	$ 2,926	$ 3,092

Loans - Recorded Investment for

Loans - Recorded Investment for Consumer Loans, Credit Quality based on Status of Loan and Payment Activity (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	$ 823,024	$ 758,094
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	83,200	85,873
Pass [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	82,632	85,322
5 [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs		25
6 [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	488	368
7 [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans after net deferred loan fees and costs	80	158
Consumer - Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	4,108	4,061
Consumer - Credit [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	4,108	4,061
Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	33,694	29,152
Consumer - Other [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	33,666	29,120
Consumer - Other [Member] | Nonperforming [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	$ 28	$ 32

Loans - Schedule of Impaired Lo

Loans - Schedule of Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Impaired loans without a valuation allowance	$ 1,131	$ 1,141
Impaired loans with a valuation allowance	614	711
Total impaired loans	1,745	1,852
Valuation allowance related to impaired loans	106	135
Total non-accrual loans	1,003	1,384
Total loans past-due ninety days or more and still accruing	0	0	$ 0
Average investment in impaired loans	1,885	1,802	2,509
Interest income recognized on impaired loans	57	64	96
Interest income recognized on a cash basis on impaired loans	$ 23	$ 27	$ 60

Loans (Impaired Loans) - Additi

Loans (Impaired Loans) - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans classified as troubled debt restructured	$ 700	$ 700
TDR loans, subsequently defaulted during the period	0	0
Maximum time for re-evaluation (in months)	12 months
Re-evaluation period for real estate	2 years
Unsecured consumer loans, credit card credits and overdraft lines of credit reach	90 days
Delinquent period for charging down consumer loans	120 days
Delinquent period for charging down commercial and agricultural credits	120 days
Foreclosed residential real estate property	$ 674	$ 774
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Foreclosed residential real estate property	25	169
Residential real estate properties foreclosure proceedings	$ 54	$ 112

Loans - Impaired Loans Classifi

Loans - Impaired Loans Classified as Troubled Debt Restructured (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified in the Last 12 Months | Contract	1	0
Pre-Modification Outstanding Recorded Investment	$ 38
Post-Modification Outstanding Recorded Investment	$ 38
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified in the Last 12 Months | Contract	0	1
Pre-Modification Outstanding Recorded Investment		$ 138
Post-Modification Outstanding Recorded Investment		$ 138

Loans - Loans Individually Eval

Loans - Loans Individually Evaluated for Impairment by Portfolio Class of Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	$ 1,131	$ 1,141
With a specific allowance recorded, Recorded Investment	614	711
Related Allowance	106	135
Recorded Investment	1,745	1,852
Related Allowance	106	135
Average Recorded Investment	1,885	1,802	$ 2,509
Interest Income Recognized	57	64	96
Interest Income Recognized Cash Basis	23	27	$ 60
Agricultural Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	101	132
With no related allowance recorded, Unpaid Principal Balance	101	132
With no related allowance recorded, Average Recorded Investment	123	147
With a specific allowance recorded, Average Recorded Investment		9
Recorded Investment	101	132
Unpaid Principal Balance	101	132
Average Recorded Investment	123	156
Agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Average Recorded Investment	27
Average Recorded Investment	27
Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	495	1,009
With no related allowance recorded, Unpaid Principal Balance	495	1,009
With no related allowance recorded, Average Recorded Investment	911	101
With no related allowance recorded, Interest Income Recognized	30	16
With no related allowance recorded, Interest Income Recognized Cash Basis	21	4
With a specific allowance recorded, Recorded Investment	80	94
With a specific allowance recorded, Unpaid Principal Balance	80	94
Related Allowance	21	34
With a specific allowance recorded, Average Recorded Investment	88	344
Recorded Investment	575	1,103
Unpaid Principal Balance	575	1,103
Related Allowance	21	34
Average Recorded Investment	999	445
Interest Income Recognized	30	16
Interest Income Recognized Cash Basis	21	4
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	202
With no related allowance recorded, Unpaid Principal Balance	202
With no related allowance recorded, Average Recorded Investment	51	427
With no related allowance recorded, Interest Income Recognized	1	24
With no related allowance recorded, Interest Income Recognized Cash Basis		23
With a specific allowance recorded, Recorded Investment	423	501
With a specific allowance recorded, Unpaid Principal Balance	423	501
Related Allowance	46	66
With a specific allowance recorded, Average Recorded Investment	486	191
With a specific allowance recorded, Interest Income Recognized	24
With a specific allowance recorded, Interest Income Recognized Cash Basis	2
Recorded Investment	625	501
Unpaid Principal Balance	625	501
Related Allowance	46	66
Average Recorded Investment	537	618
Interest Income Recognized	25	24
Interest Income Recognized Cash Basis	2	23
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	333
With no related allowance recorded, Unpaid Principal Balance	333
With no related allowance recorded, Average Recorded Investment	85	337
With no related allowance recorded, Interest Income Recognized	2
With a specific allowance recorded, Recorded Investment	111	116
With a specific allowance recorded, Unpaid Principal Balance	111	116
Related Allowance	39	35
With a specific allowance recorded, Average Recorded Investment	114	246
With a specific allowance recorded, Interest Income Recognized		24
Recorded Investment	444	116
Unpaid Principal Balance	444	116
Related Allowance	39	35
Average Recorded Investment	199	583
Interest Income Recognized	$ 2	$ 24

Loans - Summary of Activities i

Loans - Summary of Activities in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Loan Losses
Balance at beginning of year				$ 6,784				$ 6,057	$ 6,784	$ 6,057	$ 5,905
Provision for loan loss	$ 25	$ 99	$ 25	$ 73	$ 197	$ 308	$ 339	$ 277	222	1,121	625
Loans charged off									(288)	(550)	(1,030)
Recoveries									150	156	557
Balance at ending of year	6,868				6,784				6,868	6,784	6,057
Allowance for Unfunded Loan Commitments & Letters of Credit	227				217				227	217	208
Total Allowance for Credit Losses	$ 7,095				$ 7,001				$ 7,095	$ 7,001	$ 6,265

Loans - Analysis of Allowance f

Loans - Analysis of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				$ 7,001				$ 6,265	$ 7,001	$ 6,265
Charge Offs									(288)	(550)	$ (1,030)
Recoveries									150	156	557
Provision (Credit)	$ 25	$ 99	$ 25	73	$ 197	$ 308	$ 339	277	222	1,121	625
Other Non-interest expense related to unfunded									10	9
Ending Balance	7,095				7,001				7,095	7,001	6,265
Ending balance: individually evaluated for impairment	106				135				106	135
Ending balance: collectively evaluated for impairment	6,989				6,866				6,989	6,866
Ending balance: loans acquired with deteriorated credit quality					1					1
FINANCING RECEIVABLES:
Ending balance	823,024				758,094				823,024	758,094
Ending balance: individually evaluated for impairment	1,745				1,852				1,745	1,852
Ending balance: collectively evaluated for impairment	821,279				756,242				821,279	756,242
Agricultural Real Estate [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				241				211	241	211
Provision (Credit)									3	30
Ending Balance	244				241				244	241	211
Ending balance: collectively evaluated for impairment	244				241				244	241
FINANCING RECEIVABLES:
Ending balance	64,044				62,336				64,044	62,336
Ending balance: individually evaluated for impairment	101				132				101	132
Ending balance: collectively evaluated for impairment	63,943				62,204				63,943	62,204
Agricultural [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				616				582	616	582
Charge Offs										(21)
Recoveries									8	10
Provision (Credit)									43	45
Ending Balance	667				616				667	616	582
Ending balance: collectively evaluated for impairment	667				616				667	616
FINANCING RECEIVABLES:
Ending balance	95,238				84,692				95,238	84,692
Ending balance: collectively evaluated for impairment	95,238				84,692				95,238	84,692
Commercial And Industrial and Industrial Development Bonds [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				1,318				1,229	1,318	1,229
Charge Offs										(20)
Recoveries									12	11
Provision (Credit)									216	98
Ending Balance	1,546				1,318				1,546	1,318	1,229
Ending balance: individually evaluated for impairment	39				35				39	35
Ending balance: collectively evaluated for impairment	1,507				1,283				1,507	1,283
FINANCING RECEIVABLES:
Ending balance	132,787				115,093				132,787	115,093
Ending balance: individually evaluated for impairment	444				116				444	116
Ending balance: collectively evaluated for impairment	132,343				114,977				132,343	114,977
Unfunded Loan Commitment & Letters of Credit [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				217				208	217	208
Other Non-interest expense related to unfunded									10	9
Ending Balance	227				217				227	217	208
Ending balance: collectively evaluated for impairment	227				217				227	217
Receivables Acquired with Deteriorated Credit Quality [Member]
FINANCING RECEIVABLES:
Ending balance: loans acquired with deteriorated credit quality	122				200				122	200
Consumer Real Estate [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				316				338	316	338
Charge Offs									(4)	(106)
Recoveries									13	28
Provision (Credit)									18	56
Ending Balance	343				316				343	316	338
Ending balance: individually evaluated for impairment	21				34				21	34
Ending balance: collectively evaluated for impairment	322				282				322	282
Ending balance: loans acquired with deteriorated credit quality					1					1
FINANCING RECEIVABLES:
Ending balance	83,200				85,873				83,200	85,873
Ending balance: individually evaluated for impairment	575				1,103				575	1,103
Ending balance: collectively evaluated for impairment	82,625				84,770				82,625	84,770
Consumer Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
FINANCING RECEIVABLES:
Ending balance: loans acquired with deteriorated credit quality	122				200				122	200
Commercial Real Estate [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				3,250				2,516	3,250	2,516
Charge Offs									(21)	(93)
Recoveries									15	20
Provision (Credit)									(95)	807
Ending Balance	3,149				3,250				3,149	3,250	2,516
Ending balance: individually evaluated for impairment	46				66				46	66
Ending balance: collectively evaluated for impairment	3,103				3,184				3,103	3,184
FINANCING RECEIVABLES:
Ending balance	409,953				376,887				409,953	376,887
Ending balance: individually evaluated for impairment	625				501				625	501
Ending balance: collectively evaluated for impairment	409,328				376,386				409,328	376,386
Consumer [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				394				337	394	337
Charge Offs									(263)	(310)
Recoveries									102	87
Provision (Credit)									208	280
Ending Balance	441				394				441	394	337
Ending balance: collectively evaluated for impairment	441				394				441	394
FINANCING RECEIVABLES:
Ending balance	37,802				33,213				37,802	33,213
Ending balance: collectively evaluated for impairment	37,802				33,213				37,802	33,213
Unallocated [Member]
ALLOWANCE FOR CREDIT LOSSES:
Beginning balance				$ 649				$ 844	649	844
Provision (Credit)									(171)	(195)
Ending Balance	478				649				478	649	$ 844
Ending balance: collectively evaluated for impairment	$ 478				$ 649				$ 478	$ 649

Premises and Equipment - Major

Premises and Equipment - Major Categories of Banking Premises and Equipment and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	$ 43,220	$ 41,846
Less: Accumulated depreciation	(21,603)	(20,389)
Premises and Equipment (Net)	21,617	21,457
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	5,892	5,647
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	23,977	23,526
Furnishings [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	$ 13,351	$ 12,673

Premises and Equipment - Majo70

Premises and Equipment - Major Categories of Banking Premises and Equipment and Accumulated Depreciation (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	39 years
Furnishings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Furnishings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation Expenses	$ 1,600	$ 1,500	$ 1,400
Construction in Progress	$ 109

Servicing - Additional Informat

Servicing - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Transfers and Servicing [Abstract]
Loans serviced for others unpaid principal amount	$ 288.6	$ 280.4
Capitalized service right assets included in other assets	2.3	2.2
Fair market value of the capitalized servicing rights	$ 3.1	$ 2.5
Prepayment rate	10.40%	14.30%
Discount yield	6.07%	5.38%

Servicing - Summary of Mortgage

Servicing - Summary of Mortgage Servicing Rights Capitalized and Amortized (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Servicing Assets at Fair Value [Line Items]
Beginning Year	$ 2,192
End of Year	2,299	$ 2,192
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Beginning Year	2,192	2,056
Capitalized Additions	460	555
Amortization	(353)	(419)
Valuation Allowance	0	0
End of Year	$ 2,299	$ 2,192

Deposits - Time Deposits (Detai

Deposits - Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Time deposits under $250,000	$ 165,866	$ 179,387
Time deposits of $250,000 or more	21,700	19,443
Total	$ 187,566	$ 198,830

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities for Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Maturities of Time Deposits [Abstract]
2,018	$ 83,734
2,019	38,274
2,020	25,787
2,021	26,441
2,022	12,701
Thereafter	629
Total	$ 187,566	$ 198,830

Federal Funds Purchased and S76

Federal Funds Purchased and Securities Sold Under Agreement to Repurchase - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fees And Commissions Income [Abstract]
Securities to be used as collateral for the underlying repurchase agreements	$ 35,900	$ 55,200
Federal funds purchased	10,425	$ 1,700
Securities sold under agreements to repurchase	$ 29,100

Federal Funds Purchased and S77

Federal Funds Purchased and Securities Sold Under Agreement to Repurchase - Daily Securities Sold under Agreement to Repurchase (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount Outstanding at End of Period	$ 29,100
Daily Securities Sold Under Agreement to Repurchase [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount Outstanding at End of Period	$ 6,145	$ 32,814
Weighted Average Rate End of Period	1.19%	0.20%
Maximum Amount Borrowings Outstanding Month End	$ 14,929	$ 43,929
Approximate Average Outstanding in Period	$ 10,253	$ 39,928
Approximate Weighted Average Interest Rate For the Period	0.96%	0.10%
Term CDs Sold Under Agreement to Repurchase [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount Outstanding at End of Period	$ 22,925	$ 20,510
Weighted Average Rate End of Period	1.97%	1.96%
Maximum Amount Borrowings Outstanding Month End	$ 22,925	$ 20,510
Approximate Average Outstanding in Period	$ 21,172	$ 19,562
Approximate Weighted Average Interest Rate For the Period	1.81%	1.88%

Federal Funds Purchased and S78

Federal Funds Purchased and Securities Sold Under Agreement to Repurchase - Schedule of Remaining Contractual Maturity in Repurchase Agreements (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets Sold under Agreements to Repurchase [Line Items]
Federal funds purchased	$ 10,425	$ 1,700
Repurchase agreements, Remaining contractual maturity of the agreements	29,100
Total	39,495	$ 70,324
US Treasury & Agency Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements, Remaining contractual maturity of the agreements	29,070
Overnight & Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Federal funds purchased	10,425
Total	16,570
Overnight & Continuous [Member] | US Treasury & Agency Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements, Remaining contractual maturity of the agreements	6,145
Greater Than 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total	22,925
Greater Than 90 Days [Member] | US Treasury & Agency Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements, Remaining contractual maturity of the agreements	$ 22,925

Federal Home Loan Bank Advanc79

Federal Home Loan Bank Advances - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Loans	Dec. 31, 2016USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Total Borrowings	$ 5,000	$ 10,000
Number of FHLB Loans | Loans	1
Unsecured borrowings through correspondent banks	$ 69,000	58,000
Unpledged securities which could be sold or used as collateral	94,600	71,800
Additional borrowings available from the Federal Home Loan Bank based on current pledging	5,700	4,700
Maximum unsecured borrowing available	$ 116,800	115,700
FHLB Loan One [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate of loans	1.61%
Mortgage Loans at Cost [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advances, secured by mortgage loans	$ 17,300	$ 17,900

Federal Home Loan Bank Advanc80

Federal Home Loan Bank Advances - Summary of Future Obligations of FHLB Advances (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Banking and Thrift [Abstract]
2,018	$ 5,000

Federal Income Taxes - Addition

Federal Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Net tax benefit related statutory federal income tax rate		$ 8
Scenario, Forecast [Member]
Income Taxes [Line Items]
Federal statutory income tax rate	21.00%

Federal Income Taxes - Componen

Federal Income Taxes - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal									$ 5,162	$ 4,601	$ 3,941
Deferred:
Federal									29	55	(122)
Federal - impact of enacted changes in tax law									(8)
Total	$ 1,583	$ 1,159	$ 1,298	$ 1,143	$ 1,307	$ 1,161	$ 1,254	$ 934	$ 5,183	$ 4,656	$ 3,819

Federal Income Taxes - Reconcil

Federal Income Taxes - Reconciliation of the Statutory Federal Income Tax Rate to the Effective Tax Rate (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax at statutory rates									$ 6,045	$ 5,521	$ 4,792
Decrease resulting from:
Tax exempt interest									(413)	(468)	(554)
Adjustment of deferred taxes for enacted changes in tax law									(8)
Section 831 deduction									(318)	(351)	(351)
Change in other									(123)	(46)	(68)
Total	$ 1,583	$ 1,159	$ 1,298	$ 1,143	$ 1,307	$ 1,161	$ 1,254	$ 934	$ 5,183	$ 4,656	$ 3,819

Federal Income Taxes - Compon84

Federal Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Assets:
Allowance for loan losses	$ 1,464	$ 2,326
Other	399	553
Net unrealized gain on available- for-sale securities	581	1,016
Total deferred tax assets	2,444	3,895
Deferred Tax Liabilities:
Accreted discounts on bonds	55	83
FHLB stock dividends	462	744
Mortgage servicing rights	490	752
Other	1,185	1,745
Net unrealized gain on available- for-sale securities	0	0
Total deferred tax liabilities	2,192	3,324
Net Deferred Tax Asset	$ 252	$ 571

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) $ in Thousands	Sep. 20, 2017	Dec. 31, 2017USD ($)Employeesshares	Dec. 31, 2016USD ($)Employeesshares	Dec. 31, 2015USD ($)Employeesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percentage of eligible compensation on a pre-tax basis for eligible employees to save		1.00%
Employee contribution matching percentage		50.00%
Percentage of total eligible compensation, contribution by Bank, maximum limit		4.00%
Vesting percentage in participant's deferral contributions and employer matching contributions		100.00%
Vesting period		6 years
Employer matching contribution and the discretionary contribution | $		$ 972	$ 877	$ 835
Restricted stock awards, shares issued		32,000	32,300	32,000
Number of employees, received the stock | Employees			4
Share stock split ratio	2
Expense for restricted stock awards | $		$ 507	$ 402	$ 314
Awards grants originated in 2012, 2013 and 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees, received the stock | Employees				1
One employee received shares from awards granted due to retirement				500
Number of shares paid to estate of deceased employee				650
Awards grants originated in 2013, 2014 and 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees, received the stock | Employees			4
Four employees received shares from awards granted due to retirement			2,394
Awards grants originated in 2014, 2015 and 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees, received the stock | Employees		1
One employee received shares from awards granted due to retirement		640
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Stock issued to number of employees | Employees		74	74	67
Shares vest under the plan		100.00%	100.00%	100.00%
Shares forfeited due to employee termination		1,080	1,546	200
Number of shares vested		24,870	22,444	20,590
Number of employees, received the stock | Employees		52	45	45
Compensation expense | $		$ 507	$ 402	$ 314
Unrecognized compensation cost related to the nonvested portion of restricted stock awards under the plan | $		$ 1,100
Restricted Stock Awards [Member] | 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested				19,440
Restricted Stock Awards [Member] | 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested			20,050
Restricted Stock Awards [Member] | 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested		24,230

Employee Benefit Plans - Activi

Employee Benefit Plans - Activity of Restricted Stock Awards (Detail) - Restricted Stock Awards [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of Shares, Beginning of period	86,300	77,990	66,780
Number of Shares, Granted	32,000	32,300	32,000
Number of Shares, Vested	(24,870)	(22,444)	(20,590)
Number of Shares, Forfeited	(1,080)	(1,546)	(200)
Number of Shares, Nonvested, end of period	92,350	86,300	77,990
Weighted average fair value per award, Beginning of period	$ 14.10	$ 12.46	$ 11.39
Weighted average fair value per award, Granted	27.79	16.01	13.18
Weighted average fair value per award, Vested	28.60	15.86	13.17
Weighted average fair value per award, Forfeited	37.06	15.77	13.04
Weighted average fair value per award, Nonvested, end of period	$ 19.17	$ 14.10	$ 12.46

Earnings Per Share - Calculatio

Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income		$ 3,436	$ 3,222	$ 3,223	$ 2,839	$ 3,194	$ 3,015	$ 2,974	$ 2,481	$ 12,720	$ 11,664	$ 10,340
Less: distributed earnings allocated to participating securities										(45)	(37)	(31)
Less: undistributed earnings allocated to participating securities										(77)	(64)	(47)
Net earnings available to common shareholders										$ 12,598	$ 11,563	$ 10,262
Weighted average common shares outstanding including participating securities										9,250,825	9,224,230	9,234,116
Less: average unvested restricted shares										(88,664)	(79,964)	(70,000)
Weighted average common shares outstanding		9,266,584	9,252,919	9,241,750	9,241,750	9,241,662	9,225,532	9,211,068	9,218,452	9,162,161	9,144,266	9,164,116
Basic and diluted earnings per share	[1]									$ 1.38	$ 1.27	$ 1.12
[1]	Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Earnings Per Share - Calculat88

Earnings Per Share - Calculation of Basic Earnings Per Share (Parenthetical) (Detail)	Sep. 20, 2017
Earnings Per Share [Abstract]
Share stock split ratio	2

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - Directors and Executive Officers [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoan	Dec. 31, 2016USD ($)
Related Party Transaction [Line Items]
Granted loans to affiliate companies	$ 1,500	$ 1,500
Subsequent advances	10,400
Payment received	10,400
Difference in related borrowings amounts	22
Ownership interest amount	$ 23,400	$ 21,700
Number of new loans approved | SecurityLoan	0

Off Balance Sheet Activities -

Off Balance Sheet Activities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Allowance for credit losses relates to unfunded loan commitments	$ 227	$ 217

Off Balance Sheet Activities 91

Off Balance Sheet Activities - Outstanding Financial Instruments Whose Contract Amounts Represent Credit Risk (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Standby letters of credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Concentration of Risk	$ 791	$ 875
Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Concentration of Risk	237,774	223,534
Credit card arrangements [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Concentration of Risk	$ 20,184	$ 18,316

Minimum Regulatory Capital Re92

Minimum Regulatory Capital Requirements - Additional Information (Detail)	Jan. 01, 2019	Dec. 31, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum ratio of capital to risk-weighted assets		8.00%	8.00%
Minimum leverage ratio calculated as ratio of Tier 1 capital to average quarterly assets		12.02%	11.77%
Capital conservation buffer at base level		1.25%
Scenario, Forecast [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer	2.50%
Minimum ratio of capital to risk-weighted assets including capital conservation buffer	10.50%
Minimum ratio of capital to risk-weighted assets	8.00%
Minimum leverage ratio calculated as ratio of Tier 1 capital to average quarterly assets	4.00%
Capital conservation buffer at base level	0.625%
Regulatory capital requirements phase period	4 years
Scenario, Forecast [Member] | Common Equity Tier 1 Capital [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum ratio of capital to risk-weighted assets	4.50%
Capital conservation buffer	2.50%
Minimum ratio of capital to risk-weighted assets including capital conservation buffer	7.00%
Scenario, Forecast [Member] | Tier 1 Capital [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum ratio of capital to risk-weighted assets	6.00%
Minimum ratio of capital to risk-weighted assets including capital conservation buffer	8.50%

Minimum Regulatory Capital Re93

Minimum Regulatory Capital Requirements - Summary of Bank's Actual and Required Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital to Risk Weighted Assets Actual, Amount	$ 131,493	$ 123,031
Common Equity Tier 1 Capital to Risk Weighted Assets Actual, Ratio	14.73%	14.46%
Common Equity Tier 1 Capital For Capital Adequacy Purposes, Amount	$ 40,177	$ 38,296
Common Equity Tier 1 Capital to Risk Weighted Assets For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Total Risk-Based Capital to Risk Weighted Assets Actual, Amount	$ 138,588	$ 130,032
Tier 1 Capital to Risk Weighted Assets Actual, Amount	131,493	123,031
Tier 1 leverage Capital to Adjusted Total Assets Actual, Amount	$ 131,493	$ 123,031
Total Risk-Based Capital to Risk Weighted Assets Actual, Ratio	15.52%	15.28%
Tier 1 Capital to Risk Weighted Assets Actual, Ratio	14.73%	14.46%
Tier 1 leverage Capital to Adjusted Total Assets Actual, Ratio	12.02%	11.77%
Total Risk-Based Capital to Risk Weighted Assets For Capital Adequacy Purposes, Amount	$ 71,426	$ 68,081
Tier 1 Capital to Risk Weighted Assets For Capital Adequacy Purposes, Amount	53,569	51,061
Tier 1 leverage Capital to Adjusted Total Assets For Capital Adequacy Purposes, Amount	$ 43,765	$ 41,826
Total Risk-Based Capital to Risk Weighted Assets For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital to Risk Weighted Assets For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 leverage Capital to Adjusted Total Assets For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Farmers & Merchants State Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital to Risk Weighted Assets Actual, Amount	$ 107,006	$ 100,999
Common Equity Tier 1 Capital to Risk Weighted Assets Actual, Ratio	12.04%	11.91%
Common Equity Tier 1 Capital For Capital Adequacy Purposes, Amount	$ 39,992	$ 38,156
Common Equity Tier 1 Capital to Risk Weighted Assets For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common Equity Tier 1 Capital to Risk Weighted Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Amount	$ 57,767	$ 55,115
Common Equity Tier 1 Capital to Risk Weighted Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Total Risk-Based Capital to Risk Weighted Assets Actual, Amount	$ 114,101	$ 108,000
Tier 1 Capital to Risk Weighted Assets Actual, Amount	107,006	100,999
Tier 1 leverage Capital to Adjusted Total Assets Actual, Amount	$ 107,006	$ 100,999
Total Risk-Based Capital to Risk Weighted Assets Actual, Ratio	12.84%	12.73%
Tier 1 Capital to Risk Weighted Assets Actual, Ratio	12.04%	11.91%
Tier 1 leverage Capital to Adjusted Total Assets Actual, Ratio	9.92%	9.75%
Total Risk-Based Capital to Risk Weighted Assets For Capital Adequacy Purposes, Amount	$ 71,098	$ 67,833
Tier 1 Capital to Risk Weighted Assets For Capital Adequacy Purposes, Amount	53,323	50,875
Tier 1 leverage Capital to Adjusted Total Assets For Capital Adequacy Purposes, Amount	$ 43,148	$ 41,425
Total Risk-Based Capital to Risk Weighted Assets For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital to Risk Weighted Assets For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 leverage Capital to Adjusted Total Assets For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Total Risk-Based Capital to Risk Weighted Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Amount	$ 88,872	$ 84,792
Tier 1 Capital to Risk Weighted Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Amount	71,098	67,833
Tier 1 leverage Capital to Adjusted Total Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Amount	$ 53,935	$ 51,181
Total Risk-Based Capital to Risk Weighted Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital to Risk Weighted Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Tier 1 leverage Capital to Adjusted Total Assets To Be Well Capitalized Under the Prompt Corrective Action Provisions, Ratio	5.00%	5.00%

Restrictions of Dividends & I94

Restrictions of Dividends & Inter-company Borrowings - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Equity [Abstract]
Dividends may be paid without prior regulatory approval	$ 14

Fair Value of Financial Instr95

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest-bearing deposits maturing date	90 days
Collateral dependent impaired loans categorized as Level 3	$ 1,745,000	$ 1,852,000
Specific allocation for collateral dependent impaired loans	106,000	135,000
Asset impairment charges	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans categorized as Level 3	$ 1,600,000	$ 1,700,000

Fair Value of Financial Instr96

Fair Value of Financial Instruments - Estimated Fair Values and Related Carrying or Notional Amounts (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial Assets:
Cash and Cash Equivalents	$ 34,467	$ 28,322	$ 22,018	$ 24,295
Interest-bearing time deposits	4,018	1,915
Securities-available for sale	196,398	218,527
Loans held for sale	1,221	2,055
Loans, net	816,156	751,310
Financial Liabilities:
Non-interest bearing Deposits	199,114	186,390
Time Deposits	187,566	198,830
Total deposits	919,340	842,203
Federal Funds Purchased and Securities sold under agreement to repurchase	39,495	70,324
Federal Home Loan Bank advances	5,000	10,000
Dividends payable	1,193	1,053
Reported Value Measurement [Member]
Financial Assets:
Cash and Cash Equivalents	34,467	28,322
Interest-bearing time deposits	4,018	1,915
Securities-available for sale	196,398	218,527
Other Securities	3,717	3,717
Loans held for sale	1,221	2,055
Loans, net	816,156	751,310
Interest receivable	4,276	3,880
Financial Liabilities:
Interest bearing Deposits	532,660	456,983
Non-interest bearing Deposits	199,114	186,390
Time Deposits	187,566	198,830
Total deposits	919,340	842,203
Federal Funds Purchased and Securities sold under agreement to repurchase	39,495	70,324
Federal Home Loan Bank advances	5,000	10,000
Interest payable	318	256
Dividends payable	1,193	1,053
Fair Value [Member]
Financial Assets:
Cash and Cash Equivalents	34,467	28,322
Interest-bearing time deposits	4,009	1,918
Securities-available for sale	196,398	218,527
Other Securities	3,717	3,717
Loans held for sale	1,221	2,055
Loans, net	819,193	753,357
Interest receivable	4,276	3,880
Financial Liabilities:
Interest bearing Deposits	532,660	456,983
Non-interest bearing Deposits	199,114	186,390
Time Deposits	188,335	199,658
Total deposits	920,109	843,031
Federal Funds Purchased and Securities sold under agreement to repurchase	39,495	70,324
Federal Home Loan Bank advances	5,021	10,041
Interest payable	318	256
Dividends payable	1,193	1,053
Level 1 [Member]
Financial Assets:
Cash and Cash Equivalents	34,467	28,322
Securities-available for sale	20,978	24,775
Level 2 [Member]
Financial Assets:
Interest-bearing time deposits	4,009	1,918
Securities-available for sale	173,992	192,334
Financial Liabilities:
Non-interest bearing Deposits	199,114	186,390
Total deposits	199,114	186,390
Dividends payable	1,193	1,053
Level 3 [Member]
Financial Assets:
Securities-available for sale	1,428	1,418
Other Securities	3,717	3,717
Loans held for sale	1,221	2,055
Loans, net	819,193	753,357
Interest receivable	4,276	3,880
Financial Liabilities:
Interest bearing Deposits	532,660	456,983
Time Deposits	188,335	199,658
Total deposits	720,995	656,641
Federal Funds Purchased and Securities sold under agreement to repurchase	39,495	70,324
Federal Home Loan Bank advances	5,021	10,041
Interest payable	$ 318	$ 256

Fair Value of Financial Instr97

Fair Value of Financial Instruments - Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	$ 196,398	$ 218,527
U.S. Treasury [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	20,978	24,775
U.S. Government Agencies [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	80,466	82,474
Mortgage-backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	39,510	48,461
State and Local Governments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	55,444	62,817
Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	20,978	24,775
Level 1 [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	20,978	24,775
Level 1 [Member] | U.S. Treasury [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	20,978	24,775
Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	173,992	192,334
Level 2 [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	173,992	192,334
Level 2 [Member] | U.S. Government Agencies [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	80,466	82,474
Level 2 [Member] | Mortgage-backed Securities [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	39,510	48,461
Level 2 [Member] | State and Local Governments [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	54,016	61,399
Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	1,428	1,418
Level 3 [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	1,428	1,418
Level 3 [Member] | State and Local Governments [Member] | Fair Value on a Recurring Basis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total Securities Available for Sale	$ 1,428	$ 1,418

Fair Value of Financial Instr98

Fair Value of Financial Instruments - Changes in the Level 3 Fair Value Category of Unobservable Inputs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 218,527
Purchases	15,335	$ 114,819	$ 60,925
Sales	13,562	85,723	47,029
Ending Balance	196,398	218,527
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,418
Ending Balance	1,428	1,418
Level 3 [Member] | State and Local Governments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,418	7,352
Change in Market Value	10	(294)
Purchases	0	0
Sales	0	0
Payments & Maturities		(5,640)
Ending Balance	1,428	1,418	7,352
Level 3 [Member] | State and Local Governments [Member] | Tax - Exempt [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		5,904
Change in Market Value		(264)
Purchases	0	0
Sales	0	0
Payments & Maturities		(5,640)
Ending Balance			5,904
Level 3 [Member] | State and Local Governments [Member] | Taxable [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,418	1,448
Change in Market Value	10	(30)
Purchases	0	0
Sales	0	0
Ending Balance	$ 1,428	$ 1,418	$ 1,448

Fair Value of Financial Instr99

Fair Value of Financial Instruments - Collateral Dependent Impaired Loans and Other Real Estate (Detail) - Fair Value on Nonrecurring Basis [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Collateral Dependent Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	$ 508	$ 576
Other Real Estate Owned-Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	22	144
Other Real Estate Owned-Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	266
Level 3 [Member] | Collateral Dependent Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	508	576
Level 3 [Member] | Other Real Estate Owned-Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	22	$ 144
Level 3 [Member] | Other Real Estate Owned-Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	$ 266

Fair Value of Financial Inst100

Fair Value of Financial Instruments - Quantitative Information about Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
State and Local Governments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,428	$ 1,418
Collateral Dependent Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	508	576
Other Real Estate Owned-Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	22	$ 144
Other Real Estate Owned-Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 266
Minimum [Member] | State and Local Governments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.00%	0.00%
Minimum [Member] | Collateral Dependent Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.00%	0.00%
Minimum [Member] | Other Real Estate Owned-Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.00%	0.00%
Minimum [Member] | Other Real Estate Owned-Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.00%	0.00%
Maximum [Member] | State and Local Governments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	5.00%	5.00%
Maximum [Member] | Collateral Dependent Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	50.00%	50.00%
Maximum [Member] | Other Real Estate Owned-Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	20.00%	20.00%
Maximum [Member] | Other Real Estate Owned-Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	20.00%	20.00%
Weighted Average [Member] | State and Local Governments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	3.68%	3.92%
Weighted Average [Member] | Collateral Dependent Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	17.28%	18.92%
Weighted Average [Member] | Other Real Estate Owned-Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	2.22%	0.51%
Weighted Average [Member] | Other Real Estate Owned-Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	5.15%

Condensed Financial Statemen101

Condensed Financial Statements of Parent Company - Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	[1]
Related party receivables:
Total Assets	$ 1,107,009	$ 1,055,895
Liabilities
Dividends payable	1,193	1,053
Total liabilities	972,872	930,318
Stockholders' Equity	134,137	125,577	$ 120,097	$ 114,493
Total Liabilities and Stockholders' Equity	1,107,009	1,055,895
Farmers & Merchants State Bank [Member]
Assets
Cash	277	1,435
Related party receivables:
Dividends & Accounts receivable from subsidiaries	2,038	1,842
Accrued interest receivable Municipals	110	63
Note receivable from Bank subsidiary	0	0
Securities-Municipals	18,944	17,290
Certificate of Deposits	1,974
Investment in subsidiaries	112,025	106,044
Total Assets	135,368	126,674
Liabilities
Accrued expenses	39	44
Dividends payable	1,192	1,053
Total liabilities	1,231	1,097
Stockholders' Equity	134,137	125,577
Total Liabilities and Stockholders' Equity	$ 135,368	$ 126,674
[1]	Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

Condensed Financial Statemen102

Condensed Financial Statements of Parent Company - Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income
Interest									$ 37,195	$ 33,703	$ 29,293
Interest Municipals									1,193	1,437	1,739
Gain on sales of available-for-sale securities									47	588	451
Total interest income	$ 10,868	$ 10,535	$ 10,124	$ 9,721	$ 9,746	$ 9,590	$ 9,387	$ 9,004	41,248	37,727	33,650
Income Before Income Taxes and Equity in Undistributed Earnings of Subsidiaries	5,019	4,381	4,521	3,982	4,501	4,176	4,228	3,415
Income Taxes (Benefit)	1,583	1,159	1,298	1,143	1,307	1,161	1,254	934	5,183	4,656	3,819
Net Income	$ 3,436	$ 3,222	$ 3,223	$ 2,839	$ 3,194	$ 3,015	$ 2,974	$ 2,481	12,720	11,664	10,340
Other Comprehensive Income (Loss):
Unrealized gains (losses) on securities									267	(2,721)	100
Comprehensive Income									12,866	9,480	10,108
Farmers & Merchants State Bank [Member]
Income
Dividends from subsidiaries									6,850	6,000	6,220
Interest									0	0	0
Interest Municipals									313	272	219
Gain on sales of available-for-sale securities											124
Total interest income									7,163	6,272	6,563
Operating Expenses									828	681	677
Income Before Income Taxes and Equity in Undistributed Earnings of Subsidiaries									6,335	5,591	5,886
Income Taxes (Benefit)									(422)	(238)	(188)
Income from operation before equity in undistributed earnings of subsidiary									6,757	5,829	6,074
Equity in undistributed earnings of Subsidiaries									5,963	5,835	4,266
Net Income									12,720	11,664	10,340
Other Comprehensive Income (Loss):
Unrealized gains (losses) on securities									146	(2,184)	(232)
Comprehensive Income									$ 12,866	$ 9,480	$ 10,108

Condensed Financial Statemen103

Condensed Financial Statements of Parent Company - Statements of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities
Net income	$ 3,436	$ 3,222	$ 3,223	$ 2,839	$ 3,194	$ 3,015	$ 2,974	$ 2,481	$ 12,720	$ 11,664	$ 10,340
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Gain on Sale of Available for Sale Securities									(47)	(588)	(451)
Changes in Assets and Liabilities:
Other Assets and Liabilities									1,194	(688)	1,275
Net Cash Provided by Operating Activities									19,258	12,430	14,809
Activity in available for sale securities:
Maturities, prepayments and calls									23,064	41,825	26,059
Sales									13,562	85,723	47,029
Purchases									(15,335)	(114,819)	(60,925)
Net cash used in investing activities									(49,782)	(64,190)	(53,972)
Cash Flows from Financing Activities
Payment of dividends									(4,443)	(4,115)	(3,943)
Purchase of Treasury Stock									(196)	(194)	(803)
Net cash provided by financing activities									36,669	58,064	36,886
Net Increase (Decrease) in Cash and Cash Equivalents									6,145	6,304	(2,277)
Farmers & Merchants State Bank [Member]
Cash Flows from Operating Activities
Net income									12,720	11,664	10,340
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Equity in undistributed net income (Distributions in excess earnings) of subsidiaries									(5,963)	(5,835)	(4,266)
Accretion & Amortization of Securities									206	179	152
Gain on Sale of Available for Sale Securities											(124)
Changes in Assets and Liabilities:
Dividends receivable											475
Other Assets and Liabilities									199	355	156
Net Cash Provided by Operating Activities									7,162	6,363	6,733
Activity in available for sale securities:
Maturities, prepayments and calls									2,815	1,485	1,000
Sales											6,282
Purchases									(4,482)	(2,891)	(8,784)
Purchases of Certificates of Deposit									(1,974)
Net cash used in investing activities									(3,641)	(1,406)	(1,502)
Cash Flows from Financing Activities
Payment of dividends									(4,443)	(4,115)	(3,943)
Purchase of Treasury Stock									(236)	(194)	(803)
Net cash provided by financing activities									(4,679)	(4,309)	(4,746)
Net Increase (Decrease) in Cash and Cash Equivalents									(1,158)	648	485
Cash and Cash Equivalents
Cash and Cash Equivalents - Beginning of Year				$ 1,435				$ 787	1,435	787	302
Cash and Cash Equivalents - End of Year	$ 277				$ 1,435				$ 277	$ 1,435	$ 787

Quarterly Financial Data - Summ

Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of Income:
Interest income	$ 10,868	$ 10,535	$ 10,124	$ 9,721	$ 9,746	$ 9,590	$ 9,387	$ 9,004	$ 41,248	$ 37,727	$ 33,650
Interest expense	1,362	1,333	1,253	1,179	1,081	1,099	1,047	996	5,127	4,223	3,587
Net Interest Income	9,506	9,202	8,871	8,542	8,665	8,491	8,340	8,008	36,121	33,504	30,063
Provision for loan loss	25	99	25	73	197	308	339	277	222	1,121	625
Net interest income after provision of loan loss	9,481	9,103	8,846	8,469	8,468	8,183	8,001	7,731	35,899	32,383	29,438
Other income (expense)	(4,462)	(4,722)	(4,325)	(4,487)	(3,967)	(4,007)	(3,773)	(4,316)
Net income before income taxes	5,019	4,381	4,521	3,982	4,501	4,176	4,228	3,415
Income Taxes	1,583	1,159	1,298	1,143	1,307	1,161	1,254	934	5,183	4,656	3,819
Net income	$ 3,436	$ 3,222	$ 3,223	$ 2,839	$ 3,194	$ 3,015	$ 2,974	$ 2,481	$ 12,720	$ 11,664	$ 10,340
Earnings per Common Share	$ 0.37	$ 0.35	$ 0.35	$ 0.31	$ 0.35	$ 0.33	$ 0.32	$ 0.27
Average common shares outstanding	9,266,584	9,252,919	9,241,750	9,241,750	9,241,662	9,225,532	9,211,068	9,218,452	9,162,161	9,144,266	9,164,116

Quarterly Financial Data - S105

Quarterly Financial Data - Summary of Quarterly Financial Data (Parenthetical) (Detail)	Sep. 20, 2017
Income Statement [Abstract]
Share stock split ratio	2