Civista Bancshares (CIVB) 10-K 8 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 28, 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	Civb
Entity Registrant Name	CIVISTA BANCSHARES, INC.
Entity Central Index Key	944,745
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		10,209,021
Entity Public Float			$ 202,025,476

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and due from financial institutions	$ 40,519	$ 36,695
Securities available for sale	231,062	195,864
Loans held for sale	2,197	2,268
Loans, net of allowance of $13,134 and $13,305	1,151,527	1,042,201
Other securities	14,247	14,055
Premises and equipment, net	17,611	17,920
Accrued interest receivable	4,488	3,854
Goodwill	27,095	27,095
Other intangible assets	1,279	1,784
Bank owned life insurance	25,125	24,552
Other assets	10,707	10,975
Total assets	1,525,857	1,377,263
Deposits
Noninterest-bearing	361,964	345,588
Interest-bearing	842,959	775,515
Total deposits	1,204,923	1,121,103
Federal Home Loan Bank advances	71,900	48,500
Securities sold under agreements to repurchase	21,755	28,925
Subordinated debentures	29,427	29,427
Accrued expenses and other liabilities	13,391	11,692
Total liabilities	1,341,396	1,239,647
SHAREHOLDERS’ EQUITY
Preferred shares, no par value, 200,000 shares authorized Series B Preferred shares, $1,000 liquidation preference, 18,760 shares issued at December 31, 2017 and 20,481 shares issued at December 31, 2016, net of issuance costs	17,358	18,950
Common shares, no par value, 20,000,000 shares authorized, 10,946,439 shares issued at December 31, 2017 and 9,091,473 shares issued at December 31, 2016	153,810	118,975
Accumulated earnings	31,652	19,263
Treasury stock, 747,964 common shares at cost	(17,235)	(17,235)
Accumulated other comprehensive loss	(1,124)	(2,337)
Total shareholders’ equity	184,461	137,616
Total liabilities and shareholders’ equity	$ 1,525,857	$ 1,377,263

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 13,134	$ 13,305
Preferred stock, no par value
Preferred stock, shares authorized	200,000	200,000
Preferred stock, liquidation preference	$ 1,000	$ 1,000
Preferred stock, shares issued	18,760	20,481
Common stock, no par value
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	10,946,439	9,091,473
Treasury stock, shares	747,964	747,964

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest and dividend income
Loans, including fees	$ 51,198	$ 47,186	$ 44,784
Taxable securities	3,745	3,319	3,232
Tax-exempt securities	3,153	2,666	2,583
Federal funds sold and other	498	396	102
Total interest and dividend income	58,594	53,567	50,701
Interest expense
Deposits	2,342	1,996	2,087
Federal Home Loan Bank advances	695	405	442
Subordinated debentures	1,035	884	760
Securities sold under agreements to repurchase and other	20	23	20
Total interest expense	4,092	3,308	3,309
Net interest income	54,502	50,259	47,392
Provision (credit) for loan losses		(1,300)	1,200
Net interest income after provision (credit) for loan losses	54,502	51,559	46,192
Noninterest income
Service charges	4,777	4,832	4,708
Net gain (loss) on sale of securities	12	19	(18)
Net gain on sale of loans	1,745	1,750	1,106
ATM fees	2,304	2,094	1,986
Wealth management fees	3,068	2,678	2,823
Bank owned life insurance	573	563	467
Tax refund processing fees	2,750	2,750	2,000
Computer center item processing fees	246	251	267
Net gain (loss) on sale of other real estate owned	(28)	152	199
Other	887	1,043	740
Total noninterest income	16,334	16,132	14,278
Noninterest expense
Compensation expense	29,253	25,323	23,630
Net occupancy expense	2,689	2,700	2,416
Equipment expense	1,564	1,641	1,503
Contracted data processing	1,838	1,546	1,821
FDIC Assessment	502	611	864
State franchise tax	1,024	923	847
Professional services	2,300	1,895	2,461
Amortization of intangible assets	586	699	711
ATM expense	847	605	674
Marketing expense	817	929	1,039
Repossession expense	279	253	508
Other operating expenses	6,905	6,730	6,470
Total noninterest expense	48,604	43,855	42,944
Income before income taxes	22,232	23,836	17,526
Income taxes	6,360	6,619	4,781
Net income	15,872	17,217	12,745
Preferred share dividends	1,244	1,501	1,577
Net income available to common shareholders	$ 14,628	$ 15,716	$ 11,168
Earnings per common share, basic	$ 1.48	$ 1.96	$ 1.43
Earnings per common share, diluted	$ 1.28	$ 1.57	$ 1.17

Consolidated Comprehensive Inco

Consolidated Comprehensive Income statements - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 15,872	$ 17,217	$ 12,745
Other comprehensive income (loss):
Unrealized holding gains (loss) on available for sale securities	987	(2,342)	(267)
Tax effect	(375)	796	91
Pension liability adjustment	1,129	(448)	(412)
Tax effect	(329)	152	140
Total other comprehensive income (loss)	1,412	(1,842)	(448)
Comprehensive income	$ 17,284	$ 15,375	$ 12,297

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Shares [Member]	Common Shares [Member]	Accumulated (Deficit) Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Dec. 31, 2014	$ 115,909	$ 23,132	$ 114,365	$ (4,306)	$ (17,235)	$ (47)
Balance, shares at Dec. 31, 2014		25,000	7,707,917
Net income	12,745			12,745
Other comprehensive income (loss)	(448)					(448)
Conversion of Series B preferred shares to common shares		$ (859)	$ 859
Conversion of Series B preferred shares to common shares, shares		(928)	118,678
Stock-based compensation	106		$ 106
Stock-based compensation, shares			16,983
Cash dividends ($0.20, $0.22, and $0.25 per share for the year 2015, 2016 and 2017 respectively)	(1,562)			(1,562)
Preferred share dividends	(1,577)			(1,577)
Ending balance at Dec. 31, 2015	125,173	$ 22,273	$ 115,330	5,300	(17,235)	(495)
Balance, shares at Dec. 31, 2015		24,072	7,843,578
Net income	17,217			17,217
Other comprehensive income (loss)	(1,842)					(1,842)
Conversion of Series B preferred shares to common shares	(1)	$ (3,323)	$ 3,322
Conversion of Series B preferred shares to common shares, shares		(3,591)	459,192
Stock-based compensation	323		$ 323
Stock-based compensation, shares			40,739
Cash dividends ($0.20, $0.22, and $0.25 per share for the year 2015, 2016 and 2017 respectively)	(1,753)			(1,753)
Preferred share dividends	(1,501)			(1,501)
Ending balance at Dec. 31, 2016	137,616	$ 18,950	$ 118,975	19,263	(17,235)	(2,337)
Balance, shares at Dec. 31, 2016		20,481	8,343,509
Net income	15,872			15,872
Other comprehensive income (loss)	1,412					1,412
Reclassification of certain income tax effects from accumulated other comprehensive loss	199			199		(199)
Conversion of Series B preferred shares to common shares		$ (1,592)	$ 1,592
Conversion of Series B preferred shares to common shares, shares		(1,721)	220,108
Common share issuance, net of costs	32,821		$ 32,821
Common stock issuance, net of costs, shares			1,610,000
Stock-based compensation	426		$ 426
Stock-based compensation, shares			25,069
Cash dividends ($0.20, $0.22, and $0.25 per share for the year 2015, 2016 and 2017 respectively)	(2,438)			(2,438)
Preferred share dividends	(1,244)			(1,244)
Retirement of common share	(4)		$ (4)
Retirement of common stock, shares			(211)
Ending balance at Dec. 31, 2017	$ 184,461	$ 17,358	$ 153,810	$ 31,652	$ (17,235)	$ (1,124)
Balance, shares at Dec. 31, 2017		18,760	10,198,475

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated (Deficit) Earnings [Member]
Common stock dividends per share	$ 0.25	$ 0.22	$ 0.20

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	$ 15,872	$ 17,217	$ 12,745
Adjustments to reconcile net income to net cash from operating activities
Security amortization, net	1,263	1,383	1,410
Depreciation	1,249	1,257	1,193
Amortization of intangible assets	586	699	711
Amortization (Accretion) of net deferred loan fees	317	(172)	(155)
Net (gain) loss on sale of securities	(12)	(19)	18
Provision (credit) for loan losses		(1,300)	1,200
Loans originated for sale	(76,493)	(67,295)	(48,745)
Proceeds from sale of loans	78,309	69,475	49,637
Net gain on sale of loans	(1,745)	(1,750)	(1,180)
Net loss on sale of manufactured home loans			74
Net (gain) loss on sale of other real estate owned	28	(152)	(199)
Gain on sale of fixed assets	(67)	(1)
Increase in cash surrender value of bank owned life insurance	(573)	(563)	(467)
Share-based compensation	426	323	106
Change in Accrued interest payable	229	61	(11)
Accrued interest receivable	(634)	48	144
Deferred taxes	946	170	(410)
Other, net	1,118	(1,672)	(998)
Net cash from operating activities	20,819	17,709	15,073
Cash flows used for investing activities:
Maturities and calls of securities, available-for-sale	34,379	34,089	29,733
Sale of securities, available for sale	953	4,349
Purchases of securities, available-for-sale	(70,794)	(41,759)	(29,772)
Redemption of other securities			138
Purchases of other securities	(192)	(603)	(288)
Net cash from acquisition			926
Purchases of bank owned life insurance		(3,885)
Net loan originations	(109,737)	(52,022)	(10,225)
Loans purchased, installment		(1,643)	(4,774)
Proceeds from sale of manufactured homes			3,492
Proceeds from sale of OREO properties	87	333	865
Premises and equipment purchases	(1,015)	(2,437)	(1,999)
Proceeds from sale of premises and equipment	139	3
Net cash used for investing activities	(146,180)	(63,575)	(11,904)
Cash flows from financing activities:
Increase (decrease) in deposits	83,820	69,070	(3,754)
Net change in short-term FHLB advances	25,900	(22,700)	11,000
Repayment of long-term FHLB advances	(2,500)		(5,000)
Net proceeds from issuance of common shares	32,821
Net change in securities sold under repurchase agreements	(7,170)	3,885	3,427
Cash payment for repurchase of common shares	(4)
Cash paid on fractional shares on conversion of preferred shares		(1)
Cash dividends paid	(3,682)	(3,254)	(3,139)
Net cash from financing activities	129,185	47,000	2,534
Increase in cash and due from financial institutions	3,824	1,134	5,703
Cash and due from financial institutions at beginning of year	36,695	35,561	29,858
Cash and due from financial institutions at end of year	40,519	36,695	35,561
Supplemental disclosures of cash flow information:
Interest paid	3,863	3,247	3,320
Income taxes paid	5,950	5,900	3,650
Transfer of loans from portfolio to other real estate owned	94	102	222
Transfer of premises to held-for-sale	3	202
Conversion of preferred shares to common shares	1,592	$ 3,322	859
Securities purchased not settled	$ 1,291
Noncash assets acquired:
Loans receivable			76,444
Other securities			716
Accrued interest receivable			194
Premises and equipment, net			1,738
Core deposit intangible			1,009
Other assets			472
Total non cash assets acquired			80,573
Liabilities assumed:
Deposits			86,869
Other liabilities			5
Total liabilities assumed			86,874
Net noncash liabilities acquired			$ 6,301

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 The following is a summary of the accounting policies adopted by Civista Bancshares, Inc., which have a significant effect on the Consolidated Financial Statements. Nature of Operations and Principles of Consolidation The Company provides financial services through its offices in the Ohio counties of Erie, Crawford, Champaign, Cuyahoga, Franklin, Logan, Summit, Huron, Ottawa, Madison, Montgomery and Richland. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are residential mortgage, commercial, and installment loans. Substantially all loans are secured by specific items of collateral including business assets, consumer assets and commercial and residential real estate. Commercial loans are expected to be repaid from cash flow from operations of businesses. There are no significant concentrations of loans to any one industry or customer. However, our customers’ ability to repay their loans is dependent on the real estate and general economic conditions in the area. Other financial instruments that potentially represent concentrations of credit risk include deposit accounts in other financial institutions. FCIA was formed to allow the Company to participate in commission revenue generated through its third party insurance agreement. Insurance commission revenue was less than 1.0% of total revenue for the years ended December 31, 2017, 2016 and 2015. WSP was formed to hold repossessed assets of CBI’s subsidiaries. WSP revenue was less than 1% of total revenue for the years ended December 31, 2017, 2016 and 2015. FCRS was formed in 2012 and remained inactive for the periods presented. CRMI was formed in 2017 to provide property and casualty insurance coverage to CBI and its’ subsidiaries for which insurance may not be currently available or economically feasible in the insurance marketplace. CRMI revenue was less than 1% of total revenue for the year ended December 31, 2017. Use of Estimates Cash Flows Securities NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated. Gains and losses on sales are based on the amortized cost of the security sold using the specific identification method. U.S. generally accepted accounting principles (“GAAP”) guidance specifies that if (a) a company does not have the intent to sell a debt security prior to recovery and (b) it is more-likely-than-not that it will not have to sell the debt security prior to recovery, the security would not be considered other-than-temporarily impaired unless there is a credit loss. When an entity does not intend to sell the security, and it is more-likely-than-not the entity will not have to sell the security before recovery of its cost basis, it will recognize the credit component of other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. For held-to-maturity debt securities, the amount of other-than-temporary impairment recorded in other comprehensive income for the non-credit portion of a previous other-than-temporary impairment should be amortized prospectively over the remaining life of the security on the basis of the timing of future estimated cash flows of the security. For available-for-sale debt securities that management has no intent to sell and believes that it more-likely-than-not will not be required to sell prior to recovery, only the credit loss component of the impairment is recognized in earnings, while the non-credit loss is recognized in accumulated other comprehensive income. The credit loss component recognized in earnings is identified as the amount of principal cash flows not expected to be received over the remaining term of the security as projected based on cash flow projections. Other securities which include FHLB stock, Federal Reserve Bank (“FRB”) stock, Federal Agricultural Mortgage Corporation stock, Bankers’ Bancshares Inc. (“BB”) stock, and Norwalk Community Development Corp (“NCDC”) stock are carried at cost. Loans Held for Sale: Loans: Interest income on mortgage and commercial loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Interest income on consumer loans is discontinued when management determines future collection is unlikely. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued, but not received, for loans placed on nonaccrual, is reversed against interest income. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Purchased Loans: Purchased loans are accounted for individually or aggregated into pools of loans based on common risk characteristics (e.g., credit score, loan type, and date of origination). The Company estimates the amount and timing of expected cash flows for each purchased loan or pool, and the expected cash flows in excess of amount paid is recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loan’s, or pool’s, contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded. If the present value of expected future cash flows is greater than the carrying amount, the excess is recognized as part of future interest income. Allowance for Loan Losses: All commercial, commercial real estate and farm real estate loans are monitored on a regular basis with a detailed loan review completed for all loan relationships greater than $750. All commercial, commercial real estate and farm real estate loans that are 90 days past due or in nonaccrual status, are analyzed to determine if they are “impaired”, which means that it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. All loans that are delinquent 90 days are classified as substandard and placed on nonaccrual status unless they are well-secured and in the process of collection. The remaining loans are evaluated and segmented with loans with similar risk characteristics. The Company allocates reserves based on risk categories and portfolio segments described below, which conform to the Company’s asset classification policy. In reviewing risk within Civista’s loan portfolio, management has identified specific segments to categorize loan portfolio risk: (i) Commercial & Agriculture loans; (ii) Commercial Real Estate – Owner Occupied loans; (iii) Commercial Real Estate – Non-Owner Occupied loans; (iv) Residential Real Estate loans; (v) Real Estate Construction loans; (vi) Farm Real Estate loans; and (vii) Consumer and Other loans. Additional information related to economic factors can be found in Note 5. NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Loan Charge-off Policies: Troubled Debt Restructurings: Other Real Estate: Premises and Equipment: Federal Home Loan Bank Stock a b c d NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Federal Reserve Bank Stock Bank Owned Life Insurance (BOLI) Goodwill and Other Intangible Assets: Other intangible assets consist of core deposit intangibles arising from whole bank and branch acquisitions. These intangible assets are measured at fair value and then amortized on an accelerated method over their estimated useful lives, which range from five to twelve years. Servicing Rights Long-term Assets: Repurchase Agreements Loan Commitments and Related Financial Instruments: Income Taxes The Company prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The Company recognizes interest and/or penalties related to income tax matters in income tax expense. Stock-Based Compensation Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. Retirement Plans Earnings per Common Share Comprehensive Income Loss Contingencies Restrictions on Cash Dividend Restriction NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Fair Value of Financial Instruments Operating Segments Business Combinations: Derivative Instruments and Hedging Activities Derivatives and Hedging Reclassifications: NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Effect of Newly Issued but Not Yet Effective Accounting Standards: In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers Revenue from Contracts with Customers In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) goodwill impairment tests in fiscal years beginning after December 15, 2021. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In March 2017, the FASB issued ASU 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20). In May 2017, the FASB issued ASU 2017-09, Compensation – Stock Compensation (Topic 718) In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivative and Hedging (Topic 815) Debt—Debt with Conversion and Other Options NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) For public business entities, the amendments in Part I of this Update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. For all other entities, the amendments in Part I of this Update are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted for all entities, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The amendments in Part I of this Update should be applied either retrospectively to outstanding financial instruments with a down-round feature by means of a cumulative-effect adjustment to the statement of financial position as of the beginning of the first fiscal year and interim period(s) in which the pending content that links to this paragraph is effective or retrospectively to outstanding financial instruments with a down-round feature for each prior reporting period presented in accordance with the guidance on accounting changes in paragraphs 250-10-45-5 through 45-10. The amendments in Part II of this Update do not require any transition guidance because those amendments do not have an accounting effect. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 850) In September 2017, the FASB issued ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842 Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments. Revenue from Contracts with Customers Leases In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) requirements for the amendments are the same as the effective date and transition requirements in ASU 2016-02. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220) An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018 (Tax Cuts and Jobs Act)

Merger

Merger	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Merger	NOTE 2 - MERGER On March 6, 2015, CBI completed the acquisition by merger of TCNB Financial Corp. (“TCNB”) in an all-cash transaction for aggregate consideration of $17,226, or $23.50 per share of TCNB stock. The Company and TCNB had first announced that they had entered into an agreement to merge in September of 2014. Immediately following the merger, TCNB’s banking subsidiary, The Citizens National Bank of Southwestern Ohio, was merged into CBI’s banking subsidiary, Civista Bank. At the time of the merger, TCNB had total assets of $97,479, including $76,771 in loans, and $86,708 in deposits. The transaction was recorded as a purchase and, accordingly, the operating results of TCNB have been included in the Company’s Consolidated Financial Statements since the close of business on March 6, 2015. The aggregate of the purchase price over the fair value of the net assets acquired of approximately $5,375 was recorded as goodwill and will be evaluated for impairment on an annual basis. Merger-related costs were $391 as of December 31, 2015. These costs were primarily included in salaries, wages and benefits, contracted data processing and professional services on the Consolidated Statements of Operations. The following table presents financial information for the former TCNB included in the Consolidated Statements of Operations from the date of acquisition through December 31, 2015. Actual From Acquisition Date Through December 31, 2015 (in thousands) Net interest income after provision for loan losses $ 3,155 Noninterest income 138 Net income 1,282 NOTE 2 – MERGER (Continued) The following table presents unaudited pro forma information for the periods ended December 31, 2017, 2016 and 2015 as if the acquisition of TCNB had occurred on January 1, 2015. This table has been prepared for comparative purposes only and is not indicative of the actual results that would have been attained had the acquisition occurred as of the beginning of the periods presented, nor is it indicative of future results. Pro Formas (unaudited) Twelve months ended December 31, 2017 2016 2015 Net interest income after provision for loan losses $ 54,456 $ 51,389 $ 46,852 Noninterest income 16,334 16,132 14,699 Net income 15,769 16,949 11,931 Pro forma earnings per share: Basic $ 1.47 $ 1.93 $ 1.32 Diluted $ 1.28 $ 1.55 $ 1.09 The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the date of acquisition for TCNB. Core deposit intangibles will be amortized over periods of between five and ten years using an accelerated method. Goodwill will not be amortized, but instead will be evaluated for impairment. At March 6, 2015 Total purchase price $ 17,226 Net assets acquired: Cash and short-term investments 18,152 Loans, net 76,444 Other securities 716 Premises and equipment 1,738 Accrued interest receivable 194 Core deposit intangible 1,009 Other assets 472 Noninterest-bearing deposits (18,263 ) Interest-bearing deposits (68,606 ) Other liabilities (5 ) 11,851 Goodwill $ 5,375 The assets and liabilities acquired in the TCNB merger were measured at fair value. Management made certain estimates and exercised judgment in accounting for the acquisition. The following is a description of the methods used to determine fair value of significant assets and liabilities at the acquisition date: Cash and short-term investments: Loans: NOTE 2 – MERGER (Continued) Consumer and other loans. The fair value of the performing loan portfolio includes separate adjustments to reflect a credit risk and marketability component and a yield component reflecting the differential between portfolio and market yields. Additionally, certain loans were valued based on their observable sales price. Loans acquired with credit deterioration of $831 were individually evaluated to estimate credit losses and a net recovery amount for each loan. The net cash flows for each loan were then discounted to present value using a risk-adjusted market rate. Deposits:

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 available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive loss were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2017 U.S. Treasury securities and obligations of U.S.government agencies $ 30,450 $ 100 $ (192 ) $ 30,357 Obligations of states and political subdivisions 114,002 4,226 (172 ) 118,056 Mortgage-back securities in government sponsored entities 82,098 408 (690 ) 81,817 Total debt securities 226,550 4,734 (1,054 ) 230,230 Equity securities in financial institutions 481 351 — 832 Total $ 227,031 $ 5,085 $ (1,054 ) $ 231,062 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2016 U.S. Treasury securities and obligations of U.S.government agencies $ 37,406 $ 117 $ (77 ) $ 37,446 Obligations of states and political subdivisions 92,177 3,395 (574 ) 94,998 Mortgage-back securities in government sponsored entities 62,756 483 (597 ) 62,642 Total debt securities 192,339 3,995 (1,248 ) 195,086 Equity securities in financial institutions 481 297 — 778 Total $ 192,820 $ 4,292 $ (1,248 ) $ 195,864 The amortized cost and fair value of securities at year end 2017 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. Available for sale Amortized Cost Fair Value Due in one year or less $ 8,787 $ 8,765 Due from one to five years 27,662 27,691 Due from five to ten years 30,167 31,622 Due after ten years 77,836 80,335 Mortgage-backed securities in government sponsored entities 82,098 81,817 Equity securities in financial institutions 481 832 Total $ 227,031 $ 231,062 NOTE 3 – SECURITIES (Continued) Securities with a carrying value of $122,862 and $139,179 were pledged as of December 31, 2017 and 2016, respectively, to secure public deposits, other deposits and liabilities as required or permitted by law. Proceeds from sales of securities, gross realized gains and gross realized losses were as follows: 2017 2016 2015 Sale proceeds $ 953 $ 4,349 $ — Gross realized gains — 18 — Gross realized losses — — — Gains (losses) from securities called or settled by the issuer 12 1 (18 ) Debt securities with unrealized losses at year end 2017 and 2016 not recognized in income are as follows: 2017 12 Months or less More than 12 months Total Description of Securities Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss U.S. Treasury securities and obligations of U.S. government agencies $ 20,449 $ (100 ) $ 6,617 $ (92 ) $ 27,066 $ (192 ) Obligations of states and political subdivisions 4,057 (41 ) 7,309 (131 ) 11,366 (172 ) Mortgage-backed securities in gov’t sponsored entities 29,534 (195 ) 22,199 (495 ) 51,733 (690 ) Total temporarily impaired $ 54,040 $ (336 ) $ 36,125 $ (718 ) $ 90,165 $ (1,054 ) 2016 12 Months or less More than 12 months Total Description of Securities Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss U.S. Treasury securities and obligations of U.S. government agencies $ 13,271 $ (61 ) $ 893 $ (16 ) $ 14,164 $ (77 ) Obligations of states and political subdivisions 17,167 (558 ) 519 (16 ) 17,686 (574 ) Mortgage-backed securities in gov’t sponsored entities 35,453 (566 ) 2,849 (31 ) 38,302 (597 ) Total temporarily impaired $ 65,891 $ (1,185 ) $ 4,261 $ (63 ) $ 70,152 $ (1,248 ) The Company periodically evaluates securities for other-than-temporary impairment. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis. Unrealized losses that are determined to be temporary in nature are recorded, net of tax, in accumulated other comprehensive loss on the Consolidated Balance Sheet. The Company has assessed each available-for-sale security position for credit impairment. Factors considered in determining whether a loss is temporary include: • The length of time and the extent to which fair value has been below cost; • The severity of impairment; • The cause of the impairment and the financial condition and near-term prospects of the issuer; NOTE 3 – SECURITIES (Continued) • If the Company intends to sell the investment; • If it’s more-likely-than-not the Company will be required to sell the investment before recovering its amortized cost basis; and • If the Company does not expect to recover the investment’s entire amortized cost basis (even if the Company does not intend to sell the investment). The Company’s review for impairment generally entails: • Identification and evaluation of investments that have indications of impairment; • Analysis of individual investments that have fair values less than amortized cost, including consideration of length of time each investment has been in unrealized loss position and the expected recovery period; • Evaluation of factors or triggers that could cause individual investments to qualify as having other-than-temporary impairment; and • Documentation of these analyses, as required by policy. At December 31, 2017, the Company owned 78 securities that were considered temporarily impaired. The unrealized losses on these securities have not been recognized into income because the issuers’ bonds are of high credit quality, management has the intent and ability to hold these securities for the foreseeable future, and the decline in fair value is largely due to changes in market interest rates. The Company also considers sector specific credit rating changes in its analysis. The fair value is expected to recover as the securities approach their maturity date or reset date. The Company does not intend to sell until recovery and does not believe selling will be required before recovery.

Loans

Loans	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Loans	NOTE 4 - LOANS Loans at year-end were as follows: 2017 2016 Commercial and Agriculture $ 152,473 $ 135,462 Commercial Real Estate - owner occupied 164,099 161,364 Commercial Real Estate - non-owner occupied 425,623 395,931 Residential Real Estate 268,735 247,308 Real Estate Construction 97,531 56,293 Farm Real Estate 39,461 41,170 Consumer and Other 16,739 17,978 Total Loans 1,164,661 1,055,506 Allowance for loan losses (13,134 ) (13,305 ) Net loans $ 1,151,527 $ 1,042,201 Included in total loans above are deferred loan fees of $223 at December 31, 2017 and deferred loan costs of $94 at December 31, 2016. NOTE 4 – LOANS (Continued) Loans to principal officers, directors, and their affiliates at year-end 2017 and 2016 were as follows: 2017 2016 Balance - Beginning of year $ 14,389 $ 15,147 New loans and advances 2,344 850 Repayments (1,256 ) (1,575 ) Effect of changes to related parties (1,475 ) (33 ) Balance - End of year $ 14,002 $ 14,389

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Allowance for Loan Losses	NOTE 5 - ALLOWANCE FOR LOAN LOSSES Management has an established methodology to determine the adequacy of the allowance for loan losses that assesses the risks and losses inherent in the loan portfolio. For purposes of determining the allowance for loan losses, the Company has segmented certain loans in the portfolio by product type. Loans are segmented into the following pools: Commercial and Agriculture loans, Commercial Real Estate – Owner Occupied loans, Commercial Real Estate – Non-owner Occupied loans, Residential Real Estate loans, Real Estate Construction loans, Farm Real Estate loans and Consumer and Other loans. Loss migration rates for each risk category are calculated and used as the basis for calculating loan loss allowance allocations. Loss migration rates are calculated over a three-year period for all portfolio segments. Management also considers certain economic factors for trends that management uses to account for the qualitative and environmental changes in risk, which affects the level of the reserve. The following economic factors are analyzed: • Changes in lending policies and procedures • Changes in experience and depth of lending and management staff • Changes in quality of credit review system • Changes in the nature and volume of the loan portfolio • Changes in past due, classified and nonaccrual loans and TDRs • Changes in economic and business conditions • Changes in competition or legal and regulatory requirements • Changes in concentrations within the loan portfolio • Changes in the underlying collateral for collateral dependent loans The total allowance reflects management’s estimate of loan losses inherent in the loan portfolio at the consolidated balance sheet date. The Company considers the allowance for loan losses of $13,134 adequate to cover loan losses inherent in the loan portfolio, at December 31, 2017. The following tables present, by portfolio segment, the changes in the allowance for loan losses, the ending allocation of the allowance for loan losses and the loan balances outstanding for the years ended December 31, 2017, 2016 and 2015. The changes can be impacted by overall loan volume, adversely graded loans, historical charge-offs and economic factors. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Allowance for loan losses: December 31, 2017 Beginning balance Charge-offs Recoveries Provision (Credit) Ending Balance Commercial & Agriculture $ 2,018 $ (11 ) $ 372 $ (817 ) $ 1,562 Commercial Real Estate: Owner Occupied 2,171 (328 ) 69 131 2,043 Non-Owner Occupied 4,606 (38 ) 46 693 5,307 Residential Real Estate 3,089 (400 ) 194 (973 ) 1,910 Real Estate Construction 420 — 44 370 834 Farm Real Estate 442 — 3 (15 ) 430 Consumer and Other 314 (165 ) 43 98 290 Unallocated 245 — — 513 758 Total $ 13,305 $ (942 ) $ 771 $ — $ 13,134 For the year ended December 31, 2017, the allowance for Commercial & Agriculture loans was reduced by a decrease in general reserves as a result of lower loss rates. The result was represented as a decrease in the provision. The allowance for Commercial Real Estate – Owner Occupied loans was reduced by a decrease in general reserves and charge-offs. The allowance for Commercial Real Estate – Non-Owner Occupied loans increased due to an increase in general reserves required for this type as a result of higher loan balances. The allowance for Residential Real Estate loans was reduced by a decrease in general reserves required for this type as a result of a decrease in loss rates, represented by a decrease in the provision. The allowance for Real Estate Construction loans increased due to higher outstanding loan balances for this type of loan. The allowance for Farm Real Estate loans was reduced by a decrease in general reserves required for this type as a result of lower outstanding loan balances. The result was represented as a decrease in the provision. Management feels that the unallocated amount is appropriate and within the relevant range for the allowance that is reflective of the risk in the portfolio. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Allowance for loan losses: December 31, 2016 Beginning balance Charge-offs Recoveries Provision (Credit) Ending Balance Commercial & Agriculture $ 1,478 $ (880 ) $ 105 $ 1,315 $ 2,018 Commercial Real Estate: Owner Occupied 2,467 (228 ) 56 (124 ) 2,171 Non-Owner Occupied 4,657 (23 ) 1,372 (1,400 ) 4,606 Residential Real Estate 4,086 (455 ) 479 (1,021 ) 3,089 Real Estate Construction 371 (115 ) 12 152 420 Farm Real Estate 538 — — (96 ) 442 Consumer and Other 382 (125 ) 46 11 314 Unallocated 382 — — (137 ) 245 Total $ 14,361 $ (1,826 ) $ 2,070 $ (1,300 ) $ 13,305 For the year ended December 31, 2016, the increase in allowance for Commercial & Agriculture loans was due to an increase in general reserves as a result of higher balances and higher loss rates in criticized loans. The result was represented as an increase in the provision. The allowance for Commercial Real Estate – Owner Occupied loans was reduced not only by a decrease in specific reserves required for this type, but also by a decrease in general reserves due to decreases in classified, non-accrual loans and lower loss rates for this type. The result of these changes was represented as a decrease in the provision. The decrease in allowance for Commercial Real Estate – Non-Owner Occupied loans was the result of a decrease in general reserves required as a result of lower loss rates and improvement in past due, classified and non-accrual loans for this type. In addition, a payoff on a previously charged down loan was received resulting in a recovery of approximately $1,303. The net result was represented as a decrease in the provision. The allowance for Residential Real Estate loans was reduced by a decrease in general reserves required for this type as a result of a decrease in loss rates, represented by a decrease in the provision. The allowance for Real Estate Construction loans increased due to an increase in loss rates for this type of loan, which was represented as an increase in the provision. The allowance for Farm Real Estate loans was reduced by a decrease in general reserves required for this type as a result of lower outstanding loan balances and a decrease in loss rates. The result of these changes was represented as a decrease in the provision. Management feels that the unallocated amount is appropriate and within the relevant range for the allowance that is reflective of the risk in the portfolio. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Allowance for loan losses: December 31, 2015 Beginning balance Charge-offs Recoveries Provision (Credit) Ending Balance Commercial & Agriculture $ 1,819 $ (190 ) $ 182 $ (333 ) $ 1,478 Commercial Real Estate: Owner Occupied 2,221 (523 ) 187 582 2,467 Non-Owner Occupied 4,334 (81 ) 115 289 4,657 Residential Real Estate 3,747 (1,135 ) 331 1,143 4,086 Real Estate Construction 428 — 5 (62 ) 371 Farm Real Estate 822 — 76 (360 ) 538 Consumer and Other 200 (120 ) 46 256 382 Unallocated 697 — — (315 ) 382 Total $ 14,268 $ (2,049 ) $ 942 $ 1,200 $ 14,361 For the year ended December 31, 2015, the allowance for Commercial and Agriculture loans was reduced due to decreases in specific reserves for impaired loans of $625. The decrease in specific reserves for impaired loans was primarily the result of the resolution of an impaired loan. The Company did not incur losses with this resolution. The result was represented as a decrease in the provision. The increase in the allowance for Commercial Real Estate—Owner Occupied loans was the result of an increase in loss migration rates, which is attributable to the change in the lookback period to a three-year period. The increase in the allowance for Commercial Real Estate – Non–Owner Occupied loans was the result of an increase in loss migration rates, which is attributable to the change in the lookback period to a three-year period. The ending reserve balance for Residential Real Estate loans increased from the end of the previous year due to an increase in loss migration rates, which is attributable to the change in the look-back period to a three-year period. The allowance for Real Estate Construction loans decreased as a result of decreasing loan balances. The allowance for Farm Real Estate loans decreased as a result of decreasing loan balances and loss rates offset by an increase in classified loans. The increase in the allowance for Consumer and other loans increased due to an increase in loss rates, which is attributable to the change in the look-back period. Unallocated reserves declined due to a change in the Company’s lookback period. As described above, the Company changed from a two-year lookback period to a three-year lookback period when calculating all but one segment’s loss migration rates during the third quarter of 2015. The change in methodology resulted in a decline in the unallocated balance with corresponding increase in allocated balances within the reserve calculation. While loan balances were up, loss rates continued to trend downward, exclusive of the change in methodology, resulting in a lower allowance balance. While criticized loans increased slightly, we saw significant improvement in nonperforming loan balances resulting in a decline in specific reserves for impaired loans. As of December 31, 2015, management felt that the unallocated amount was appropriate and within the relevant range for the allowance that was reflective of the risk in the portfolio. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) The following tables present, by portfolio segment, the allocation of the allowance for loan losses and related loan balances as of December 31, 2017 and December 31, 2016. December 31, 2017 Loans acquired with credit deterioration Loans individually evaluated for impairment Loans collectively evaluated for impairment Total Allowance for loan losses: Commercial & Agriculture $ 82 $ 4 $ 1,476 $ 1,562 Commercial Real Estate: Owner Occupied — 6 2,037 2,043 Non-Owner Occupied — — 5,307 5,307 Residential Real Estate 44 109 1,757 1,910 Real Estate Construction — — 834 834 Farm Real Estate — 6 424 430 Consumer and Other — — 290 290 Unallocated — — 758 758 Total $ 126 $ 125 $ 12,883 $ 13,134 Outstanding loan balances: Commercial & Agriculture $ 87 $ 438 $ 151,948 $ 152,473 Commercial Real Estate: Owner Occupied — 1,010 163,089 164,099 Non-Owner Occupied — 44 425,579 425,623 Residential Real Estate 128 1,360 267,247 268,735 Real Estate Construction — — 97,531 97,531 Farm Real Estate — 608 38,853 39,461 Consumer and Other — — 16,739 16,739 Total $ 215 $ 3,460 $ 1,160,986 $ 1,164,661 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) December 31, 2016 Loans acquired with credit deterioration Loans individually evaluated for impairment Loans collectively evaluated for impairment Total Allowance for loan losses: Commercial & Agriculture $ 86 $ 82 $ 1,850 $ 2,018 Commercial Real Estate: Owner Occupied — 4 2,167 2,171 Non-Owner Occupied — — 4,606 4,606 Residential Real Estate 89 102 2,898 3,089 Real Estate Construction — — 420 420 Farm Real Estate — — 442 442 Consumer and Other — — 314 314 Unallocated — — 245 245 Total $ 175 $ 188 $ 12,942 $ 13,305 Outstanding loan balances: Commercial & Agriculture $ 88 $ 1,983 $ 133,391 $ 135,462 Commercial Real Estate: Owner Occupied — 1,896 159,468 161,364 Non-Owner Occupied — 359 395,572 395,931 Residential Real Estate 168 1,686 245,454 247,308 Real Estate Construction — — 56,293 56,293 Farm Real Estate — 614 40,556 41,170 Consumer and Other — 1 17,977 17,978 Total $ 256 $ 6,539 $ 1,048,711 $ 1,055,506 The following tables represent credit exposures by internally assigned risk ratings for the periods ended December 31, 2017 and 2016. The remaining loans in the Residential Real Estate, Real Estate Construction and Consumer and Other loan categories that are not assigned a risk grade are presented in a separate table below. The risk rating analysis estimates the capability of the borrower to repay the contractual obligations of the loan agreements as scheduled or at all. The Company’s internal credit risk rating system is based on experiences with similarly graded loans. The Company’s internally assigned grades are as follows: • Pass – loans which are protected by the current net worth and paying capacity of the obligor or by the value of the underlying collateral. • Special Mention – loans where a potential weakness or risk exists, which could cause a more serious problem if not corrected. • Substandard – loans that have a well-defined weakness based on objective evidence and are characterized by the distinct possibility that Civista will sustain some loss if the deficiencies are not corrected. • Doubtful – loans classified as doubtful have all the weaknesses inherent in a substandard asset. In addition, these weaknesses make collection or liquidation in full highly questionable and improbable, based on existing circumstances. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) • Loss – loans classified as a loss are considered uncollectible, or of such value that continuance as an asset is not warranted. • Unrated – Generally, Residential Real Estate, Real Estate Construction and Consumer and Other loans are not risk-graded, except when collateral is used for a business purpose. December 31, 2017 Pass Special Mention Substandard Doubtful Ending Balance Commercial & Agriculture $ 140,842 $ 8,412 $ 3,219 $ — $ 152,473 Commercial Real Estate: Owner Occupied 155,756 1,166 7,177 — 164,099 Non-Owner Occupied 422,363 2,321 939 — 425,623 Residential Real Estate 62,628 1,997 5,873 — 70,498 Real Estate Construction 91,545 15 27 — 91,587 Farm Real Estate 25,228 11,236 2,997 — 39,461 Consumer and Other 1,312 — 70 — 1,382 Total $ 899,674 $ 25,147 $ 20,302 $ — $ 945,123 December 31, 2016 Pass Special Mention Substandard Doubtful Ending Balance Commercial & Agriculture $ 127,867 $ 4,300 $ 3,295 $ — $ 135,462 Commercial Real Estate: Owner Occupied 151,659 4,016 5,689 — 161,364 Non-Owner Occupied 393,592 1,676 663 — 395,931 Residential Real Estate 59,015 1,661 6,911 — 67,587 Real Estate Construction 50,678 16 27 — 50,721 Farm Real Estate 31,814 5,673 3,683 — 41,170 Consumer and Other 2,135 — 109 — 2,244 Total $ 816,760 $ 17,342 $ 20,377 $ — $ 854,479 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) The following tables present performing and nonperforming loans based solely on payment activity for the years ended December 31, 2017 and December 31, 2016 that have not been assigned an internal risk grade. The types of loans presented here are not assigned a risk grade unless there is evidence of a problem. Payment activity is reviewed by management on a monthly basis to evaluate performance. Loans are considered to be nonperforming when they become 90 days past due or if management thinks that we may not collect all of our principal and interest. Nonperforming loans also include certain loans that have been modified in Troubled Debt Restructurings (TDRs) where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties. These concessions typically result from the Company’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions due to economic status. Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months. December 31, 2017 Residential Real Estate Real Estate Construction Consumer and Other Total Performing $ 198,237 $ 5,944 $ 15,341 $ 219,522 Nonperforming — — 16 16 Total $ 198,237 $ 5,944 $ 15,357 $ 219,538 December 31, 2016 Residential Real Estate Real Estate Construction Consumer and Other Total Performing $ 179,721 $ 5,572 $ 15,725 $ 201,018 Nonperforming — — 9 9 Total $ 179,721 $ 5,572 $ 15,734 $ 201,027 The following tables include an aging analysis of the recorded investment of past due loans outstanding as of December 31, 2017 and 2016. December 31, 2017 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Total Past Due Current Purchased Credit- Impaired Loans Total Loans Past Due 90 Days and Accruing Commercial & Agriculture $ 575 $ 2 $ 685 $ 1,262 $ 151,124 $ 87 $ 152,473 $ — Commercial Real Estate: Owner Occupied 897 104 484 1,485 162,614 — 164,099 — Non-Owner Occupied 133 — 470 603 425,020 — 425,623 — Residential Real Estate 1,613 229 785 2,627 265,980 128 268,735 — Real Estate Construction — — 27 27 97,504 — 97,531 — Farm Real Estate 27 — 186 213 39,248 — 39,461 — Consumer and Other 92 96 16 204 16,535 — 16,739 16 Total $ 3,337 $ 431 $ 2,653 $ 6,421 $ 1,158,025 $ 215 $ 1,164,661 $ 16 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) December 31, 2016 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Total Past Due Current Purchased Credit- Impaired Loans Total Loans Past Due 90 Days and Accruing Commercial & Agriculture $ 156 $ 20 $ 152 $ 328 $ 135,046 $ 88 $ 135,462 $ — Commercial Real Estate: Owner Occupied 722 553 280 1,555 159,809 — 161,364 — Non-Owner Occupied 147 — 316 463 395,468 — 395,931 — Residential Real Estate 1,812 507 1,049 3,368 243,772 168 247,308 — Real Estate Construction — — 27 27 56,266 — 56,293 — Farm Real Estate 93 — — 93 41,077 — 41,170 — Consumer and Other 215 31 31 277 17,701 — 17,978 9 Total $ 3,145 $ 1,111 $ 1,855 $ 6,111 $ 1,049,139 $ 256 $ 1,055,506 $ 9 The following table presents loans on nonaccrual status, excluding purchased credit-impaired (PCI) loans, as of December 31, 2017 and 2016. 2017 2016 Commercial & Agriculture $ 887 $ 1,622 Commercial Real Estate: Owner Occupied 1,476 1,461 Non-Owner Occupied 711 464 Residential Real Estate 2,778 3,266 Real Estate Construction 27 27 Farm Real Estate 186 2 Consumer and Other 67 101 Total $ 6,132 $ 6,943 Nonaccrual Loans: NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Modifications: Loans modified in a TDR are typically already on non-accrual status and partial charge-offs have in some cases already been taken against the outstanding loan balance. As a result, loans modified in a TDR may have the financial effect of increasing the specific allowance associated with the loan. An allowance for impaired loans that have been modified in a TDR are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the estimated fair value of the collateral, less any selling costs, if the loan is collateral dependent. Management exercises significant judgment in developing these estimates. TDRs accounted for $169 of the allowance for loan losses as of December 31, 2017, $278 as of December 31, 2016 and $286 as of December 31, 2015. Loan modifications that are considered TDRs completed during the twelve month periods ended December 31, 2017, 2016 and 2015 were as follows: For the Twelve Month Period Ended December 31, 2017 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Commercial & Agriculture — $ — $ — Commercial Real Estate: Owner Occupied — — — Non-Owner Occupied — — — Residential Real Estate 1 13 13 Real Estate Construction — — — Farm Real Estate — — — Consumer and Other — — — Total Loan Modifications 1 $ 13 $ 13 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) For the Twelve Month Period Ended December 31, 2016 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Commercial & Agriculture 4 $ 529 $ 529 Commercial Real Estate: Owner Occupied — — — Non-Owner Occupied — — — Residential Real Estate 2 308 308 Real Estate Construction — — — Farm Real Estate 3 700 700 Consumer and Other — — — Total Loan Modifications 9 $ 1,537 $ 1,537 For the Twelve Month Period Ended December 31, 2015 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Commercial & Agriculture — $ — $ — Commercial Real Estate: Owner Occupied — — — Non-Owner Occupied — — — Residential Real Estate — — — Real Estate Construction 1 41 41 Farm Real Estate — — — Consumer and Other — — — Total Loan Modifications 1 $ 41 $ 41 Recidivism, or the borrower defaulting on its obligation pursuant to a modified loan, results in the loan once again becoming a non-accrual loan. Recidivism occurs at a notably higher rate than do defaults on new originations loans, so modified loans present a higher risk of loss than do new origination loans. During the periods ended December 31, 2017 and 2016, there were no defaults on loans that were modified and considered TDRs during the previous twelve months. During the twelve month period ended December 31, 2015, there was one default, totaling $107, on loans which were modified and considered TDRs during the previous twelve months. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Impaired Loans: The following tables include the recorded investment and unpaid principal balances for impaired financing receivables, excluding PCI loans, with the associated allowance amount, if applicable, as of December 31, 2017 and 2016. December 31, 2017 December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded: Commercial & Agriculture $ — $ — $ 1,230 $ 1,751 Commercial Real Estate: Owner Occupied 693 913 1,658 1,803 Non-Owner Occupied 44 48 359 386 Residential Real Estate 977 1,049 1,259 1,590 Farm Real Estate 148 148 614 614 Consumer and Other — — 1 1 Total 1,862 2,158 5,121 6,145 With an allowance recorded: Commercial & Agriculture 438 438 $ 4 753 1,303 $ 82 Commercial Real Estate: Owner Occupied 317 317 6 238 238 4 Non-Owner Occupied — — — — — — Residential Real Estate 383 387 109 427 431 102 Farm Real Estate 460 460 6 — — — Total 1,598 1,602 125 1,418 1,972 188 Total: Commercial & Agriculture 438 438 4 1,983 3,054 82 Commercial Real Estate: Owner Occupied 1,010 1,230 6 1,896 2,041 4 Non-Owner Occupied 44 48 — 359 386 — Residential Real Estate 1,360 1,436 109 1,686 2,021 102 Farm Real Estate 608 608 6 614 614 — Consumer and Other — — — 1 1 — Total $ 3,460 $ 3,760 $ 125 $ 6,539 $ 8,117 $ 188 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) The following tables include the average recorded investment and interest income recognized for impaired financing receivables as of, and for the years ended, December 31, 2017, 2016 and 2015. For the year ended: December 31, 2017 December 31, 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial & Agriculture $ 1,375 $ 34 $ 2,036 $ 40 Commercial Real Estate: Owner Occupied 1,507 75 1,847 862 Non-Owner Occupied 233 6 1,039 83 Residential Real Estate 1,515 73 1,787 175 Real Estate Construction — — — 1 Farm Real Estate 613 28 1,006 95 Consumer and Other — — 2 — Total $ 5,243 $ 216 $ 7,717 $ 1,256 For the year ended: December 31, 2015 Average Recorded Investment Interest Income Recognized Commercial & Agriculture $ 1,519 $ 54 Commercial Real Estate: Owner Occupied 2,738 139 Non-Owner Occupied 1,946 32 Residential Real Estate 2,544 103 Real Estate Construction 16 — Farm Real Estate 653 56 Consumer and Other 4 — Total $ 9,420 $ 384 Foreclosed assets acquired in settlement of loans are carried at fair value less estimated costs to sell and are included in other assets on the Consolidated Balance Sheet. As of December 31, 2017 and 2016, a total of $16 and $37, respectively of foreclosed assets were included with other assets. As of December 31, 2017, included within the foreclosed assets is $16 of consumer residential mortgages that were foreclosed on or received via a deed in lieu transaction prior to the period end. As of December 31, 2017 and 2016, the Company had initiated formal foreclosure procedures on $239 and $710, respectively of consumer residential mortgages. NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Changes in the amortizable yield for PCI loans were as follows, since acquisition: At December 31, 2017 At December 31, 2016 (In Thousands) (In Thousands) Balance at beginning of period $ 49 $ 80 Acquisition of PCI loans — — Accretion (34 ) (31 ) Balance at end of period $ 15 $ 49 The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30: At December 31, 2017 At December 31, 2016 Acquired Loans with Specific Evidence of Deterioration of Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence of Deterioration of Credit Quality (ASC 310-30) (In Thousands) Outstanding balance $ 775 $ 850 Carrying amount 215 256 There has been $126 and $175 in allowance for loan losses recorded for acquired loans with or without specific evidence of deterioration in credit quality as of December 31, 2017 and 2016, respectively.

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Other Comprehensive Income (Loss)	NOTE 6 - OTHER COMPREHENSIVE INCOME (LOSS) The following table presents the changes in each component of accumulated other comprehensive loss, net of tax, as of December 31, 2017, 2016 and 2015. For the Year Ended December 31, 2017 For the Year Ended December 31, 2016 For the Year Ended December 31, 2015 Unrealized Gains and Losses on Available for Sale Securities Defined Benefit Pension Items Total Unrealized Gains and Losses on Available for Sale Securities Defined Benefit Pension Items Total Unrealized Gains and Losses on Available for Sale Securities Defined Benefit Pension Items Total Beginning balance $ 2,008 $ (4,345 ) $ (2,337 ) $ 3,554 $ (4,049 ) $ (495 ) $ 3,730 $ (3,777 ) $ (47 ) Other comprehensive income (loss) before reclassifications 620 553 1,173 (1,533 ) (511 ) (2,044 ) (188 ) (449 ) (637 ) Amounts reclassified from accumulated other comprehensive loss (8 ) 247 239 (13 ) 215 202 12 177 189 Net current-period other comprehensive income (loss) 612 800 1,412 (1,546 ) (296 ) (1,842 ) (176 ) (272 ) (448 ) Reclassification of certain income tax effects from accumulated other comprehensive loss 565 (764 ) (199 ) — — — — — — Ending balance $ 3,185 $ (4,309 ) $ (1,124 ) $ 2,008 $ (4,345 ) $ (2,337 ) $ 3,554 $ (4,049 ) $ (495 ) The following table presents the amounts reclassified out of each component of accumulated other comprehensive loss as of December 31, 2017, 2016 and 2015. Amount Reclassified from Accumulated Other Comprehensive Loss (a) For the year ended December 31, Details about Accumulated Other Comprehensive Loss Components 2017 2016 2015 Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on available-for-sale securities $ 12 $ 19 $ (18 ) Net gain (loss) on sale of securities Tax effect (4 ) (6 ) 6 Income taxes 8 13 (12 ) Amortization of defined benefit pension items Actuarial losses (380 ) (b) (326 ) (b) (270 ) (b) Salaries, wages and benefits Tax effect 133 111 93 Income taxes (247 ) (215 ) (177 ) Total reclassifications for the period $ (239 ) $ (202 ) $ (189 ) (a) Amounts in parentheses indicate expenses and other amounts indicate income. (b) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Premises and Equipment	NOTE 7 - PREMISES AND EQUIPMENT Year-end premises and equipment were as follows: 2017 2016 Land and improvements $ 5,022 $ 5,094 Buildings and improvements 21,221 20,266 Furniture and equipment 17,004 16,070 Total 43,247 41,430 Accumulated depreciation (25,636 ) (23,510 ) Premises and equipment, net $ 17,611 $ 17,920 Depreciation expense was $1,249, $1,257 and $1,193 for 2017, 2016 and 2015, respectively. Rent expense was $580, $540 and $506 for 2017, 2016 and 2015, respectively. Rent commitments under non-cancelable operating leases at December 31, 2017 were as follows, before considering renewal options that generally are present. 2018 $ 571 2019 479 2020 226 2021 91 2022 36 Total $ 1,403 The rent commitments listed above are primarily for the leasing of seven financial services branches.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	NOTE 8 - GOODWILL AND INTANGIBLE ASSETS There has been no change in the carrying amount of goodwill of $27,095 for the years ended December 31, 2017 and December 31, 2016. Management performs an evaluation of goodwill for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that the asset might be impaired. Management performed an evaluation of the Company’s goodwill during the fourth quarter of 2017. Based on this test, management concluded that the Company’s goodwill was not impaired at December 31, 2017. NOTE 8 - GOODWILL AND INTANGIBLE ASSETS (Continued) Acquired intangible assets were as follows as of year end. 2017 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized intangible assets(1): MSRs $ 1,065 $ 322 $ 743 $ 912 $ 250 $ 662 Core deposit intangibles 7,274 6,738 536 7,274 6,152 1,122 Total amortized intangible assets $ 8,339 $ 7,060 $ 1,279 $ 8,186 $ 6,402 $ 1,784 (1) Excludes fully amortized intangible assets Aggregate core deposit intangible amortization expense was $586, $699 and $711 for 2017, 2016 and 2015, respectively. Aggregate mortgage servicing rights amortization was $72, $74 and $29 for 2017, 2016 and 2015, respectively. Estimated amortization expense for each of the next five years and thereafter is as follows: MSRs Core deposit intangibles Total 2018 $ 41 $ 111 $ 152 2019 41 88 129 2020 41 71 112 2021 41 68 109 2022 41 68 109 Thereafter 538 130 668 $ 743 $ 536 $ 1,279

Interest-Bearing Deposits

Interest-Bearing Deposits	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Interest-Bearing Deposits	NOTE 9 - INTEREST-BEARING DEPOSITS Interest-bearing deposits as of December 31, 2017 and 2016 were as follows: 2017 2016 Demand $ 183,680 $ 183,759 Statement and Passbook Savings 435,377 384,330 Certificates of Deposit: $250 and over 8,206 13,640 Other 192,455 168,723 Individual Retirement Accounts 23,241 25,063 Total $ 842,959 $ 775,515 NOTE 9 - INTEREST-BEARING DEPOSITS (Continued) Scheduled maturities of certificates of deposit, including IRA’s at December 31, 2017 were as follows: 2018 $ 161,656 2019 41,926 2020 15,459 2021 3,382 2022 1,202 Thereafter 277 Total $ 223,902 Deposits from the Company’s principal officers, directors, and their affiliates at year-end 2017 and 2016 were $9,633 and $9,209, respectively. As of December 31, 2017, CDs and IRAs totaling $9,141 met or exceeded the FDIC’s insurance limit of $250,000.

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Short-Term Borrowings	NOTE 10 - SHORT-TERM BORROWINGS Short-term borrowings, which consist of federal funds purchased and other short-term borrowings are summarized as follows: At December 31, 2017 At December 31, 2016 Federal Funds Purchased Short-term Borrowings Federal Funds Purchased Short-term Borrowings Outstanding balance at year end $ — $ 56,900 $ — $ 31,000 Maximum indebtedness during the year 20,000 115,050 20,000 70,400 Average balance during the year 119 38,825 116 10,483 Average rate paid during the year 1.68 % 1.12 % 0.86 % 0.42 % Interest rate on year end balance — 1.42 % — 0.64 % At December 31, 2015 Federal Funds Purchased Short-term Borrowings Outstanding balance at year end $ — $ 53,700 Maximum indebtedness during the year — 64,700 Average balance during the year 69 26,880 Average rate paid during the year 0.53 % 0.20 % Interest rate on year end balance — 0.35 % Average balance during the year represent daily averages. Average interest rates represent interest expense divided by the related average balances. These borrowing transactions can range from overnight to six months in maturity. The average maturity was one day at December 31, 2017, 2016 and 2015.

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 11 - FEDERAL HOME LOAN BANK ADVANCES Long term advances from the FHLB were $15,000 at December 31, 2017 and $17,500 at December 31, 2016. Outstanding balances have maturity dates ranging from February 2018 to October 2019 and fixed rates ranging from 1.50% to 2.10%. The average rate on outstanding advances was 1.70% at December 31, 2017. NOTE 11 - FEDERAL HOME LOAN BANK ADVANCES (Continued) Scheduled principal reductions of FHLB advances outstanding at December 31, 2017 were as follows: 2018 $ 10,000 2019 5,000 Total $ 15,000 In addition to the borrowings, the Company had outstanding letters of credit with the FHLB totaling $19,600 at year-end 2017 and 2016, respectively used for pledging to secure public funds. FHLB borrowings and the letters of credit were collateralized by FHLB stock and by $137,250 and $102,150 of residential mortgage loans under a blanket lien arrangement at year-end 2017 and 2016, respectively. The Company had a FHLB maximum borrowing capacity of $366,122 as of December 31, 2017, with remaining borrowing capacity of approximately $274,622. The borrowing arrangement with the FHLB is subject to annual renewal. The maximum borrowing capacity is recalculated at least quarterly.

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	12 Months Ended
	Dec. 31, 2017
Brokers And Dealers [Abstract]
Securities Sold Under Agreements to Repurchase	NOTE 12 - SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Securities sold under agreements to repurchase are used to facilitate the needs of our customers as well as to facilitate our short-term funding needs. Securities sold under repurchase agreements are carried at the amount of cash received in association with the agreement. We continuously monitor the collateral levels and may be required, from time to time, to provide additional collateral based on the fair value of the underlying securities. Securities pledged as collateral under repurchase agreements are maintained with our safekeeping agents. The following table presents detail regarding the securities pledged as collateral under repurchase agreements as of December 31, 2017 and 2016. All of the repurchase agreements are overnight agreements. December 31, 2017 December 31, 2016 Securities pledged for repurchase agreements: U.S. Treasury securities $ 874 $ 1,761 Obligations of U.S. government agencies 20,881 27,164 Total securities pledged $ 21,755 $ 28,925 Gross amount of recognized liabilities for repurchase agreements $ 21,755 $ 28,925 Amounts related to agreements not included in offsetting disclosures above $ — $ — Information concerning securities sold under agreements to repurchase was as follows: 2017 2016 2015 Outstanding balance at year end $ 21,755 $ 28,925 $ 25,040 Average balance during the year 18,234 21,767 20,086 Average interest rate during the year 0.10 % 0.10 % 0.10 % Maximum month-end balance during the year $ 23,889 $ 28,925 $ 25,040 Weighted average interest rate at year end 0.10 % 0.10 % 0.10 %

Subordinated Debentures

Subordinated Debentures	12 Months Ended
	Dec. 31, 2017
Brokers And Dealers [Abstract]
Subordinated Debentures	NOTE 13 - SUBORDINATED DEBENTURES Trusts formed by the Company issued floating rate trust preferred securities, in the amounts of $5,000 and $7,500, through special purpose entities as part of pooled offerings of such securities. The Company issued subordinated debentures to the trusts in exchange for the proceeds of the offerings, which debentures represent the sole assets of the trusts. The Company may redeem the subordinated debentures, in whole but not in part, at face value. In April 2007, the Company elected to redeem and refinance the $5,000 floating rate subordinated debenture. The refinancing was done at face value and resulted in a 2.00% reduction in the floating rate. The new subordinated debenture has a 30-year maturity and is redeemable, in whole or in part, anytime without penalty. The replacement subordinated debenture does not have any deferred issuance cost associated with it. The interest rate at December 31, 2017 on the $7,500 debenture was 4.48% and the $5,000 debenture was 2.92%. Additionally, the Company formed an additional trust that issued $12,500 of 6.05% fixed rate trust preferred securities for five years, then becoming floating rate trust preferred securities, through a special purpose entity as part of a pooled offering of such securities. The Company issued subordinated debentures to the trusts in exchange for the proceeds of the offerings, which debentures represent the sole assets of the trusts. The Company may redeem the subordinated debentures at face value without penalty. The current rate on the $12,500 subordinated debenture is 3.58%. Finally, the Company acquired two additional trust preferred securities as part of its acquisition of Futura Banc Corp (Futura) in December 2007. Futura TPF Trust I and Futura TPF Trust II were formed in June of 2005 in the amounts of $2,500 and $1,927, respectively. Futura had issued subordinated debentures to the trusts in exchange for ownership of all of the common security of the trusts and the proceeds of the preferred securities sold by the trusts. The Company may redeem the subordinated debentures, in whole or in part, in a principal amount with integral multiples of $1,000, at 100% of the principal amount, plus accrued and unpaid interest. The subordinated debentures mature on June 15, 2035. The subordinated debentures are also redeemable in whole or in part from time to time, upon the occurrence of specific events defined within the trust indenture. The current rate on the $2,500 subordinated debenture is variable at 2.98%. In June 2010, the rate on the $1,927 subordinated debenture switched from a fixed rate to a floating rate. The current rate on the $1,927 subordinated debenture is 2.98%.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 14 - INCOME TAXES Income taxes were as follows for the years ended December 31: 2017 2016 2015 Current $ 5,414 $ 6,449 $ 5,191 Deferred 435 170 (410 ) Change in corporate tax rate 511 — — Income taxes $ 6,360 $ 6,619 $ 4,781 Effective tax rates differ from the statutory federal income tax rate of 35% in 2017 and 2016 and 34% in 2015 due to the following: 2017 2016 2015 Income taxes computed at the statutory federal tax rate $ 7,781 $ 8,343 $ 5,959 Add (subtract) tax effect of: Nontaxable interest income, net of nondeductible interest expense (1,107 ) (946 ) (900 ) Low income housing tax credit (686 ) (435 ) (303 ) Cash surrender value of BOLI (201 ) (197 ) (159 ) Change in corporate tax rate 511 — — Other 62 (146 ) 184 Income tax expense $ 6,360 $ 6,619 $ 4,781 NOTE 14 - INCOME TAXES (Continued) The Tax Cut and Jobs Act, enacted on December 22, 2017, lowered the federal corporate income tax rate from 35% to 21% effective January 1, 2018. As a result, the carrying value of net deferred tax assets was reduced, which increased income tax expense by $511. Year-end deferred tax assets and liabilities were due to the following: 2017 2016 Deferred tax assets Allowance for loan losses $ 2,848 $ 4,640 Deferred compensation 1,213 1,762 Intangible assets 95 187 Pension costs — 277 Other 141 102 Deferred tax asset 4,297 6,968 Deferred tax liabilities Tax depreciation in excess of book depreciation (275 ) (97 ) Discount accretion on securities (43 ) (58 ) Purchase accounting adjustments (536 ) (1,091 ) FHLB stock dividends (1,053 ) (1,705 ) Unrealized gain on securities available for sale (847 ) (1,035 ) Pension costs (293 ) — Prepaids (320 ) — Other (166 ) (256 ) Deferred tax liability (3,533 ) (4,242 ) Net deferred tax asset $ 764 $ 2,726 No valuation allowance was established at December 31, 2017 and 2016, due to the Company’s ability to carryback to taxes paid in previous years and certain tax strategies, coupled with the anticipated future income as evidenced by the Company’s earning potential. The Company and its subsidiaries are subject to U.S. federal income tax. The Company is subject to tax in Ohio based upon its net worth. There is currently no liability for uncertain tax positions and no known unrecognized tax benefits. The Company’s federal tax returns for taxable years through 2012 have been closed for purposes of examination by the Internal Revenue Service.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract]
Retirement Plans	NOTE 15 - RETIREMENT PLANS The Company sponsors a savings and retirement 401(k) plan, which covers all employees who meet certain eligibility requirements and who choose to participate in the plan. The matching contribution to the 401(k) plan was $805, $734 and $667 in 2017, 2016 and 2015, respectively. The Company’s matching contribution is 100% of an employee’s first three percent contributed and 50% of the next two percent contributed. The Company also sponsors a pension plan which is a noncontributory defined benefit retirement plan for all employees who have attained the age of 20 1 ⁄ 2, completed six months of service and work 1,000 or more hours per year. Annual payments, subject to the maximum amount deductible for federal income tax purposes, are made to a pension trust fund. In 2006, the Company amended the pension plan to provide that no employee could be added as a participant to the pension plan after December 31, 2006. In April 2014, the Company amended the pension plan again to provide that no additional benefits would accrue beyond April 30, 2014. NOTE 15 - RETIREMENT PLANS (Continued) In October 2015, the Company, on behalf of it and its subsidiaries, entered into Pension Shortfall Agreements (the “Shortfall Agreements”) with ten employees of the Bank. When the Company ceased accruals to its defined benefit pension plan on April 30, 2014, the circumstances of some participants with limited periods until their anticipated retirement dates would not permit them to use other available alternatives to make up for the shortfall in their expected pension. The Company calculated the total amount of the shortfall for each of the referenced individuals after considering its contributions to other retirement benefits. Pension shortfall expense was $18 in 2017, $201 in 2016 and $364 in 2015. Included in pension shortfall expense was interest expense, totaling $18, $11 and $10 in 2017, 2016 and 2015, respectively, which was also recorded in and credited to the accounts of the ten individuals covered by this plan. Information about the pension plan is as follows: 2017 2016 Change in benefit obligation: Beginning benefit obligation $ 16,964 $ 16,328 Service cost — — Interest cost 679 689 Curtailment gain — — Settlement loss 46 51 Actuarial (gain)/loss 986 669 Benefits paid (759 ) (773 ) Ending benefit obligation 17,916 16,964 Change in plan assets, at fair value: Beginning plan assets 16,150 15,647 Actual return 1,947 802 Employer contribution 2,000 500 Benefits paid (759 ) (773 ) Administrative expenses (32 ) (26 ) Ending plan assets 19,306 16,150 Funded status at end of year $ 1,390 $ (814 ) Amounts recognized in accumulated other comprehensive loss at December 31, consist of unrecognized actuarial loss of $4,070, net of $2,191 tax in 2017 and $4,345, net of $2,238 tax in 2016. The accumulated benefit obligation for the defined benefit pension plan was $17,916 at December 31, 2017 and $16,964 at December 31, 2016. The components of net periodic pension expense were as follows: 2017 2016 2015 Service cost $ — $ — $ — Interest cost 679 689 604 Expected return on plan assets (1,178 ) (1,090 ) (1,088 ) Net amortization and deferral 380 326 270 Net periodic pension cost (benefit) $ (119 ) $ (75 ) $ (214 ) Net loss (gain) recognized in other comprehensive loss $ (322 ) $ 448 $ 412 Total recognized in net periodic benefit cost and other comprehensive loss (before tax) $ (441 ) $ 373 $ 198 NOTE 15 - RETIREMENT PLANS (Continued) The estimated net loss for the defined benefit pension plan that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year is $380. The Company incurred settlement costs in 2017, 2016 and 2015 of $237, $259 and $415, respectively. The weighted average assumptions used to determine benefit obligations at year-end were as follows: 2017 2016 2015 Discount rate on benefit obligation 3.51 % 4.00 % 4.16 % Long-term rate of return on plan assets 7.00 % 7.00 % 7.00 % Rate of compensation increase 0.00 % 0.00 % 0.00 % The weighted average assumptions used to determine net periodic pension cost were as follows: 2017 2016 2015 Discount rate on benefit obligation 4.00 % 4.16 % 3.69 % Long-term rate of return on plan assets 7.00 % 7.00 % 7.00 % Rate of compensation increase 0.00 % 0.00 % 0.00 % The Company uses long-term market rates to determine the discount rate on the benefit obligation. Declines in the discount rate lead to increases in the actuarial loss related to the benefit obligation. The expectation for long-term rate of return on the pension assets and the expected rate of compensation increases are reviewed periodically by management in consultation with outside actuaries and primary investment consultants. Factors considered in setting and adjusting these rates are historic and projected rates of return on the portfolio and historic and estimated rates of increases of compensation. Since the pension plan is frozen, the rate of compensation increase used to determine the benefit obligation for 2017, 2016 and 2015 was zero. The Company’s pension plan asset allocation at year-end 2017 and 2016 and target allocation for 2018 by asset category are as follows: Target Allocation Percentage of Plan Assets at Year-end Asset Category 2018 2017 2016 Equity securities 20-50 % 48.0 % 47.5 % Debt securities 30-60 51.9 52.1 Money market funds 20-30 0.1 0.4 Total 100.0 % 100.0 % The Company developed the pension plan investment policies and strategies for plan assets with its pension management firm. The assets are currently invested in four diversified investment funds, which include two equity funds, one money market fund and one bond fund. The long-term guidelines from above were created to maximize the return on portfolio assets while reducing the risk of the portfolio. The management firm may allocate assets among the separate accounts within the established long-term guidelines. Transfers among these accounts will be at the management firm’s discretion based on their investment outlook and the investment strategies that are outlined at periodic meetings with the Company. The expected long-term rate of return on the plan assets was 7.00% in 2017 and 2016. This return is based on the expected return for each of the asset categories, weighted based on the target allocation for each class. The Company does not expect to make any contribution to its pension plan in 2018. Employer contributions totaled $2,000 in 2017. Increased contributions and increased plan assets offset by increased benefit obligations led to a change in funded status from $(814) at December 31, 2016 to $1,390 at December 31, 2017. NOTE 15 - RETIREMENT PLANS (Continued) The following tables set forth by level, within the fair value hierarchy, the pension plan’s assets at fair value as of December 31, 2017 and 2016: December 31, 2017 Level 1 Level 2 Level 3 Total Assets: Cash $ 113 $ — $ — $ 113 Bond mutual funds 23 — — 23 Common/collective trust: Bonds 9,980 — — 9,980 Equities 6,654 — — 6,654 Equity market funds: International 750 — — 750 Large cap 1,085 — — 1,085 Mid cap 269 — — 269 Small cap 432 — — 432 Total assets at fair value $ 19,306 $ — $ — $ 19,306 Investment in equity securities, debt securities, money market funds and mutual funds are valued at the closing price reported on the active market on which the individual securities are traded. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Pension Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Expected benefit payments, which reflect expected future service, are as follows: 2018 $ 1,903 2019 1,127 2020 650 2021 913 2022 1,182 2023 through 2027 4,723 Total $ 10,498 Supplemental Retirement Plan Civista established a supplemental retirement plan (“SERP”) in 2013, which covers key members of management. Under the SERP, participants will receive annually, following retirement, a percentage of their base compensations at the time of their retirement for a maximum of ten years. The SERP liability recorded at December 31, 2017, was $2,308, compared to $1,984 at December 31, 2016. The expense related to the SERP was $365, $243 and $299 for 2017, 2016 and 2015, respectively. Distributions to participants made in 2017, 2016 and 2015 totaled $41, $34, and $22, respectively.

Equity Incentive Plan

Equity Incentive Plan	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plan	NOTE 16 - EQUITY INCENTIVE PLAN At the Company’s 2014 annual meeting, the shareholders adopted the Company’s 2014 Incentive Plan (“2014 Incentive Plan”). The 2014 Incentive Plan authorizes the Company to grant options, stock awards, stock units and other awards for up to 375,000 common shares of the Company. There were 292,209 shares available for grants under this plan at December 31, 2017. During each of the last two years, the Board of Directors has awarded restricted common shares to senior officers of the Company. The restricted shares vest ratably over a three-year period following the grant date. The product of the number of restricted shares granted and the grant date market price of the Company’s common shares determines the fair value of restricted shares under the Company’s 2014 Incentive Plan. Management recognizes compensation expense for the fair value of restricted shares on a straight-line basis over the requisite service period for the entire award. On January 4, 2016, directors of the Company’s banking subsidiary, Civista, were paid a retainer in the form of non-restricted common shares of the Company. The aggregate of 2,730 common shares were issued to Civista directors as payment of their retainer for their service on the Civista Board of Directors covering the period up to the 2016 Annual Meeting. This issuance was expensed in its entirety when the shares were issued in the amount of $32. On May 17, 2016, directors of the Company’s banking subsidiary, Civista, were paid a retainer in the form of non-restricted common shares of the Company. The aggregate of 12,285 common shares were issued to Civista directors as payment of their retainer for their service on the Civista Board of Directors covering the period up to the 2017 Annual Meeting. This issuance was expensed in its entirety when the shares were issued in the amount of $130. On May 16, 2017, directors of the Company’s banking subsidiary, Civista, were paid a retainer in the form of non-restricted common shares of the Company. The aggregate of 6,804 common shares were issued to Civista directors as payment of their retainer for their service on the Civista Board of Directors covering the period up to the 2018 Annual Meeting. This issuance was expensed in its entirety when the shares were issued in the amount of $144. Finally, on September 11, 2017, a newly appointed director of the Company’s banking subsidiary, Civista, was paid a retainer in the form of non-restricted common shares of the Company. The aggregate of 367 common shares was issued as payment of her retainer for her service on the Civista Board of Directors covering the period up to the 2018 Annual Meeting. This issuance was expensed in its entirety when the shares were issued in the amount of $8. No options had been granted under the 2014 Incentive Plan as of December 31, 2017 and 2016. The Company classifies share-based compensation for employees with “Salaries, wages and benefits” in the Consolidated Statements of Operations. The following is a summary of the status of the Company’s restricted shares, and changes therein during the twelve months ended December 31, 2017 and 2016: December 31, 2017 December 31, 2016 Number of Restricted Shares Weighted Average Grant Date Fair Value Number of Restricted Shares Weighted Average Grant Date Fair Value Nonvested at beginning of period 37,050 $ 10.77 16,983 $ 10.82 Granted 17,898 22.15 28,864 10.75 Vested (12,810 ) 10.76 (5,657 ) 10.82 Forfeited — — (3,140 ) 10.87 Nonvested at end of period 42,138 15.60 37,050 10.77 NOTE 16 - EQUITY INCENTIVE PLAN (Continued) The following is a summary of the status of the Company’s awarded restricted shares as of December 31, 2017: At December 31, 2017 Date of Award Shares Remaining Expense Remaining Vesting Period (Years) January 15, 2016 10,260 $ 66 3.00 March 11, 2016 15,748 33 1.00 March 20, 2017 11,713 110 2.00 March 20, 2017 6,185 108 4.00 43,906 $ 317 2.79 During the twelve months ended December 31, 2017, the Company recorded $274 of share-based compensation expense and $152 of director retainer fees for shares granted under the 2014 Incentive Plan. At December 31, 2017, the total compensation cost related to unvested awards not yet recognized is $317, which is expected to be recognized over the weighted average remaining life of the grants of 2.79 years.

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurement	NOTE 17 - FAIR VALUE MEASUREMENT U.S. generally accepted accounting principles establish a hierarchal disclosure framework associated with the level of observable pricing utilized in measuring assets and liabilities at fair value. The three broad levels defined by the hierarchy are as follows: Level 1: Quoted prices for identical assets in active markets that are identifiable on the measurement date; Level 2: Significant other observable inputs, such as quoted prices for similar assets, quoted prices in markets that are not active and other inputs that are observable or can be corroborated by observable market data; Level 3: Significant unobservable inputs that reflect the Company’s own view about the assumptions that market participants would use in pricing an asset. Securities: Equity securities: Fair value swap asset/liability: Impaired loans: NOTE 17 - FAIR VALUE MEASUREMENT (Continued) Other real estate owned: Assets measured at fair value are summarized below. Fair Value Measurements at December 31, 2017 Using: (Level 1) (Level 2) (Level 3) Assets measured at fair value on a recurring basis: U.S. Treasury securities and obligations of U.S. Government agencies $ — $ 30,357 $ — Obligations of states and political subdivisions — 118,056 — Mortgage-backed securities in government sponsored entities — 81,817 — Equity securities in financial institutions — 832 — Fair value swap asset — 1,560 — Liabilities measured at fair value on a recurring basis: Fair value swap liability — 1,560 — Assets measured at fair value on a nonrecurring basis: Impaired Loans $ — $ — $ 1,040 Other Real Estate Owned — — 16 Fair Value Measurements at December 31, 2016 Using: (Level 1) (Level 2) (Level 3) Assets measured at fair value on a recurring basis: U.S. Treasury securities and obligations of U.S. Government agencies $ — $ 37,446 $ — Obligations of states and political subdivisions — 94,998 — Mortgage-backed securities in government sponsored entities — 62,642 — Equity securities in financial institutions — 778 — Fair value swap asset — 1,839 — Liabilities measured at fair value on a recurring basis: Fair value swap liability — 1,839 — Assets measured at fair value on a nonrecurring basis: Impaired Loans $ — $ — $ 952 Other Real Estate Owned — — 37 NOTE 17 - FAIR VALUE MEASUREMENT (Continued) The following tables presents quantitative information about the Level 3 significant unobservable inputs for assets and liabilities measured at fair value on a nonrecurring basis at December 31, 2017 and 2016. Quantitative Information about Level 3 Fair Value Measurements December 31, 2017 Fair Value Valuation Technique Unobservable Input Range Weighted Average Impaired loans $ 1,040 Appraisal of collateral Appraisal adjustments 0% - 30% 16% Liquidation expense 0% - 10% 8% Holding period 0 - 30 months 20 months Other real estate owned $ 16 Appraisal of collateral Appraisal adjustments 10% - 30% 10% Liquidation expense 0% - 10% 10% Quantitative Information about Level 3 Fair Value Measurements December 31, 2016 Fair Value Valuation Technique Unobservable Input Range Weighted Average Impaired loans $ 952 Appraisal of collateral Appraisal adjustments 10% - 67% 64% Liquidation expense 0% - 10% 4% Holding period 0 - 30 months 19 months Other real estate owned $ 37 Appraisal of collateral Appraisal adjustments 10% - 30% 10% Liquidation expense 0% - 10% 10% The carrying amount and fair value of financial instruments were as follows: December 31, 2017 Carrying Amount Total Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from financial institutions $ 40,519 $ 40,519 $ 40,519 $ — $ — Securities available for sale 231,062 231,062 — 231,062 — Loans, held for sale 2,197 2,197 2,197 — — Loans, net of allowance for loan losses 1,151,527 1,146,969 — — 1,146,969 Other securities 14,247 14,247 14,247 — — Bank owned life insurance 25,125 25,125 25,125 — — Accrued interest receivable 4,336 4,336 4,336 — — Swap asset 1,560 1,560 — 1,560 — Financial Liabilities: Nonmaturing deposits 981,021 981,021 981,021 — — Time deposits 223,902 223,626 — — 223,626 Short-term FHLB advances 56,900 56,900 56,900 — — Long-term FHLB advances 15,000 14,964 — — 14,964 Securities sold under agreement to repurchase 21,755 21,755 21,755 — — Subordinated debentures 29,427 31,052 — — 31,052 Accrued interest payable 410 410 410 — — Swap liability 1,560 1,560 — 1,560 — NOTE 17 - FAIR VALUE MEASUREMENT (Continued) December 31, 2016 Carrying Amount Total Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from financial institutions $ 36,695 $ 36,695 $ 36,695 $ — $ — Securities available for sale 195,864 195,864 — 195,864 — Loans, held for sale 2,268 2,268 2,268 — — Loans, net of allowance for loan losses 1,042,201 1,047,329 — — 1,047,329 Other securities 14,055 14,055 14,055 — — Bank owned life insurance 24,552 24,552 24,552 — — Accrued interest receivable 3,854 3,854 3,854 — — Swap asset 1,839 1,839 — 1,839 — Financial Liabilities: Nonmaturing deposits 913,677 913,677 913,677 — — Time deposits 207,426 207,784 — — 207,784 Short-term FHLB advances 31,000 31,000 31,000 — — Long-term FHLB advances 17,500 17,553 — — 17,553 Securities sold under agreement to repurchase 28,925 28,925 28,925 — — Subordinated debentures 29,427 27,414 — — 27,414 Accrued interest payable 181 181 181 — — Swap liability 1,839 1,839 — 1,839 — The fair value approximates carrying amount for all items except those described below. Fair value for securities is based on quoted market values for the individual securities or for equivalent securities. For fixed rate loans or deposits and for variable rate loans or deposits with infrequent repricing or repricing limits, fair value is based on discounted cash flows using current market rates applied to the cash flow analysis or underlying collateral values. For swaps, fair value of the swap asset and liability is based on an external derivative model using data inputs as of the valuation date. Fair value of debt is based on current rates for similar financing. The fair value of off-balance-sheet items is based on the current fees or cost that would be charged to enter into or terminate such arrangements and are considered nominal. For certain homogeneous categories of loans, such as some residential mortgages, credit card receivables, and other consumer loans, fair value is estimated using the quoted market prices for securities backed by similar loans, adjusted for differences in loan characteristics. The fair value of other types of loans is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities.

Commitments, Contingencies and

Commitments, Contingencies and Off-Balance-Sheet Risk	12 Months Ended
	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments, Contingencies and Off-Balance-Sheet Risk	NOTE 18 - COMMITMENTS, CONTINGENCIES AND OFF-BALANCE-SHEET RISK Some financial instruments, such as loan commitments, credit lines, letters of credit, and overdraft protection are issued to meet customer financing needs. These are agreements to provide credit or to support the credit of others, as long as conditions established in the contract are met, and usually have expiration dates. Commitments may expire without being used. Off-balance-sheet risk to credit loss exists up to the face amount of these instruments, although material losses are not anticipated. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment. The contractual amount of financial instruments with off-balance-sheet risk was as follows at year-end. 2017 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to extend credit: Lines of credit and construction loans $ 4,982 $ 286,925 $ 6,905 $ 202,923 Overdraft protection 7 33,353 5 29,075 Letters of credit 624 2,637 600 349 $ 5,613 $ 322,915 $ 7,510 $ 232,347 Commitments to make loans are generally made for a period of one year or less. Fixed-rate loan commitments included above had interest rates ranging from 2.88% to 10.25% at December 31, 2017 and 3.25% to 8.50% at December 31, 2016. Maturities extend up to 30 years. Civista is required to maintain certain reserve balances on hand in accordance with the Federal Reserve Board requirements. The average reserve balance maintained in accordance with such requirements was $4,112 on December 31, 2017 and $2,887 on December 31, 2016.

Capital Requirements and Restri

Capital Requirements and Restriction on Retained Earnings	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Capital Requirements and Restriction on Retained Earnings	NOTE 19 - CAPITAL REQUIREMENTS AND RESTRICTION ON RETAINED EARNINGS The Company (consolidated) and Civista collectively, the (“Companies”) 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 Companies’ financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Companies must meet specific capital guidelines that involve quantitative measures of the Companies’ assets, liabilities, and certain off-balance-sheet items as calculated under U.S. GAAP, regulatory reporting requirements, and regulatory capital standards. The Companies’ capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulatory capital standards to ensure capital adequacy require the Companies to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital to risk-weighted assets, common equity Tier 1 capital to total risk-weighted assets, and of Tier 1 capital to average assets. Management believes, as of December 31, 2017, that the Companies met all capital adequacy requirements to which they were subject. NOTE 19 - CAPITAL REQUIREMENTS AND RESTRICTION ON RETAINED EARNINGS (Continued) As of December 31, 2017, and 2016, the most recent notification from the Federal Reserve Bank categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized the Companies must maintain minimum total risk-based capital, Tier 1 risk-based capital, common equity Tier 1 risk-based capital, and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed the institution’s category. The Company’s and Civista’s actual capital levels and minimum required capital levels at December 31, 2017 and 2016 were as follows: To Be Well Capitalized Under For Capital Prompt Corrective Actual Adequacy Purposes Action Purposes Amount Ratio Amount Ratio Amount Ratio 2017 Total Risk Based Capital Consolidated $ 200,772 16.6 % $ 97,025 8.0 % n/a n/a Civista 161,394 13.3 96,880 8.0 $ 121,100 10.0 % Tier I Risk Based Capital Consolidated 187,638 15.5 72,769 6.0 n/a n/a Civista 147,473 12.2 72,660 6.0 96,880 8.0 CET1 Risk Based Capital Consolidated 140,853 11.6 54,576 4.5 n/a n/a Civista 136,760 11.3 54,495 4.5 78,715 6.5 Leverage Consolidated 187,638 12.7 59,089 4.0 n/a n/a Civista 147,473 10.0 59,031 4.0 73,788 5.0 2016 Total Risk Based Capital Consolidated $ 155,145 14.2 % $ 87,436 8.0 % n/a n/a Civista 145,270 13.3 87,334 8.0 $ 109,168 10.0 % Tier I Risk Based Capital Consolidated 141,840 13.0 65,577 6.0 n/a n/a Civista 131,391 12.0 65,501 6.0 87,334 8.0 CET1 Risk Based Capital Consolidated 93,463 8.6 49,183 4.5 n/a n/a Civista 120,465 11.0 49,126 4.5 70,959 6.5 Leverage Consolidated 141,840 10.6 53,774 4.0 n/a n/a Civista 131,391 9.8 53,717 4.0 67,146 5.0 CBI’s primary source of funds for paying dividends to its shareholders and for operating expense is the cash accumulated from dividends received from Civista. Payment of dividends by Civista to CBI is subject to restrictions by Civista’s regulatory agencies. These restrictions generally limit dividends to the current and prior two years retained earnings as defined by the regulations. In addition, dividends may not reduce capital levels below minimum regulatory requirements. At December 31, 2017, Civista had $36,440 net profits available to pay dividends to CBI.

Parent Company Only Condensed F

Parent Company Only Condensed Financial Information	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Parent Company Only Condensed Financial Information	NOTE 20 - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION Condensed financial information of CBI follows: December 31, Condensed Balance Sheets 2017 2016 Assets: Cash $ 29,908 $ 4,747 Securities available for sale 832 778 Investment in bank subsidiary 167,192 149,965 Investment in nonbank subsidiaries 12,928 12,635 Other assets 5,212 1,226 Total assets $ 216,072 $ 169,351 Liabilities: Deferred income taxes and other liabilities $ 2,184 $ 2,308 Subordinated debentures 29,427 29,427 Total liabilities 31,611 31,735 Shareholders’ Equity: Preferred stock 17,358 18,950 Common stock 153,810 118,975 Accumulated earnings 31,652 19,263 Treasury Stock (17,235 ) (17,235 ) Accumulated other comprehensive loss (1,124 ) (2,337 ) Total shareholders’ equity 184,461 137,616 Total liabilities and shareholders’ equity $ 216,072 $ 169,351 For the years ended December 31, Condensed Statements of Operations 2017 2016 2015 Dividends from bank subsidiaries $ — $ — $ 14,226 Interest expense (1,035 ) (884 ) (760 ) Pension expense (925 ) (184 ) (388 ) Other expense, net (1,071 ) (920 ) (1,755 ) Income (loss) before equity in undistributed net earnings of subsidiaries (3,031 ) (1,988 ) 11,323 Income tax benefit 1,407 676 959 Equity in undistributed net earnings of subsidiaries 17,496 18,529 463 Net income $ 15,872 $ 17,217 $ 12,745 Comprehensive income $ 17,284 $ 15,375 $ 12,297 NOTE 20 - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION (Continued) For the years ended December 31, Condensed Statements of Cash Flows 2017 2016 2015 Operating activities: Net income $ 15,872 $ 17,217 $ 12,745 Adjustment to reconcile net income to net cash from (used for) operating activities: Change in other assets and other liabilities (2,147 ) 1,821 1,324 Gain on sale of fixed asets (66 ) — — Equity in undistributed net earnings of subsidiaries (17,496 ) (18,529 ) (463 ) Net cash (used for) from operating activities (3,837 ) 509 13,606 Investing activities: Proceeds from sale of premises and equipment 138 — — Acquisition and additional capitalization of subsidiary, net of cash acquired (275 ) — (16,637 ) Net cash used for investing activities (137 ) — (16,637 ) Financing activities: Cash paid on fractional shares on preferred stock conversion to common stock — (1 ) — Net proceeds from common stock issuance 32,821 — — Payment to repurchase common stock (4 ) — — Cash dividends paid (3,682 ) (3,254 ) (3,139 ) Net cash from (used for) financing activities 29,135 (3,255 ) (3,139 ) Net change in cash and cash equivalents 25,161 (2,746 ) (6,170 ) Cash and cash equivalents at beginning of year 4,747 7,493 13,663 Cash and cash equivalents at end of year $ 29,908 $ 4,747 $ 7,493

Preferred Shares

Preferred Shares	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Preferred Shares	NOTE 21 - PREFERRED SHARES On December 19, 2013, the Company completed the sale of 1,000,000 depositary shares, each representing a 1/40th ownership interest in a 6.50% Noncumulative Redeemable Convertible Perpetual Preferred Share, Series B, of the Company, with a liquidation preference of $1,000 per share (equivalent to $25.00 per depositary share). The Company sold the maximum of 1,000,000 depositary shares in the offering, resulting in gross proceeds to the Company of $25,000. Using proceeds from the sale of the depositary shares, the Company redeemed all of its outstanding Series A Preferred Shares for an aggregate purchase price of $22,857, which redemption was completed as of February 15, 2014. As of December 31, 2017, a total of 750,382 depository shares were outstanding.

Earnings per Common Share

Earnings per Common Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings per Common Share	NOTE 22 - EARNINGS PER COMMON SHARE The factors used in the earnings per share computation follow. 2017 2016 2015 Basic Net income $ 15,872 $ 17,217 $ 12,745 Preferred stock dividends 1,244 1,501 1,577 Net income available to common shareholders—basic $ 14,628 $ 15,716 $ 11,168 Weighted average common shares outstanding—basic 9,906,856 8,010,399 7,822,369 Basic earnings per share $ 1.48 $ 1.96 $ 1.43 Diluted Net income available to common shareholders—basic $ 14,628 $ 15,716 $ 11,168 Preferred stock dividends on convertible preferred stock 1,244 1,501 1,577 Net income available to common shareholders—diluted $ 15,872 $ 17,217 $ 12,745 Weighted average common shares outstanding for earnings per common share basic 9,906,856 8,010,399 7,822,369 Add: dilutive effects of convertible preferred shares 2,445,760 2,940,562 3,095,966 Average shares and dilutive potential common shares outstanding—diluted 12,352,616 10,950,961 10,918,335 Diluted earnings per share $ 1.28 $ 1.57 $ 1.17 Basic earnings per common share are calculated by dividing net income by the weighted-average number of common shares outstanding for the period. Diluted earnings per common share include the dilutive effect, if any, of additional potential common shares issuable under the equity incentive plan, computed using the treasury stock method, and the impact of the Company’s convertible preferred shares using the “if converted” method.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	NOTE 23 - QUARTERLY FINANCIAL DATA (UNAUDITED) Interest Income Net Interest Income Net Income Basic Earnings per Common Share Diluted Earnings per Common Share 2017 First quarter (1)(2) $ 13,692 $ 12,892 $ 4,635 $ 0.47 $ 0.40 Second quarter (3)(4) 14,228 13,367 3,596 0.32 0.29 Third quarter (3) 14,836 13,680 3,660 0.33 0.29 Fourth quarter (3)(5) 15,838 14,563 3,981 0.36 0.30 2016 First quarter (1)(2) $ 13,053 $ 12,235 $ 4,725 $ 0.55 $ 0.43 Second quarter (5)(6) 13,739 12,940 5,181 0.61 0.47 Third quarter (7) 13,370 12,526 3,680 0.41 0.34 Fourth quarter (8) 13,405 12,558 3,631 0.39 0.33 (1) Interest income and net interest income increased due to loan volume and rate and volume on interest-bearing deposits in other banks. (2) Net income increased due to fees on tax refund processing program. ( 3 ) Interest income and net interest income increased due to increases in loan volume and rate. ( 4 ) Net income decreased due to a decrease in fees on the tax refund processing program. (5 ) Interest income and net interest income increased due to interest recoveries on non-performing loans. (6 ) Net income increased due to interest recoveries and provision credit. (7 ) Interest income, net interest income and net income decreased due to previous quarter interest recoveries and provision credit. ( 8 ) Interest income and net interest income increased due to loan volume and interest recoveries.

Derivative Hedging Instruments

Derivative Hedging Instruments	12 Months Ended
	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Hedging Instruments	NOTE 24 - DERIVATIVE HEDGING INSTRUMENTS To accommodate customer need and to support the Company’s asset/liability positioning, on occasion we enter into interest rate swaps with a customer and a bank counterparty. The Company enters into a floating rate loan and a fixed rate swap with our customer. Simultaneously, the Company enters into an offsetting fixed rate swap with a bank counterparty. In connection with each swap transaction, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on the same notional amount at a fixed interest rate. At the same time, the Company agrees to pay a bank counterparty the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. These transactions allow the Company’s customer to effectively convert variable rate loans to fixed rate loans. Since the Company acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts offset each other and do not significantly impact the Company’s results of operations. NOTE 24 - DERIVATIVE HEDGING INSTRUMENTS (Continued) The following table summarizes the Company’s interest rate swap positions and the impact of a 1 basis point change in interest rates as of December 31, 2017. Notional Amount Weighted Average Rate Received/ (Paid) Impact of a 1 basis point change in interest rates Repricing Frequency Derivative Assets $ 66,227 5.08 % $ 36 Monthly Derivative Liabilities (66,227 ) -5.08 % (36 ) Monthly Net Exposure $ — $ — The following table summarizes the Company’s interest rate swap positions and the impact of a 1 basis point change in interest rates as of December 31, 2016. Notional Amount Weighted Average Rate Received/ (Paid) Impact of a 1 basis point change in interest rates Repricing Frequency Derivative Assets $ 52,975 5.07 % $ 30 Monthly Derivative Liabilities (52,975 ) -5.07 % (30 ) Monthly Net Exposure $ — $ — The Company monitors and controls all derivative products with a comprehensive Board of Director approved commercial loan swap policy. All hedge transactions must be approved in advance by the Lenders Loan Committee or the Directors Loan Committee of the Board of Directors.

Qualified Affordable Housing Pr

Qualified Affordable Housing Project Investments	12 Months Ended
	Dec. 31, 2017
Federal Home Loan Banks [Abstract]
Qualified Affordable Housing Project Investments	NOTE 25 – QUALIFIED AFFORDABLE HOUSING PROJECT INVESTMENTS The Company invests in qualified affordable housing projects. At December 31, 2017 and 2016, the balance of the Company’s investments in qualified affordable housing projects was $3,204 and $2,754, respectively. These balances are reflected in the other assets line on the Consolidated Balance Sheet. The unfunded commitments related to the investments in qualified affordable housing projects totaled $4,510 and $2,313 at December 31, 2017 and 2016, respectively. During the years ended December 31, 2017 and 2016, the Company recognized amortization expense with respect to its investments in qualified affordable housing projects of $354 and $304, respectively, which was included within pre-tax income on the Consolidated Statements of Operations. Additionally, during the years ended December 31, 2017 and 2016, the Company recognized tax credits and other benefits from its investments in affordable housing tax credits of $686 and $538, respectively. During the years ended December 31, 2017 and 2016, the Company did not incur impairment losses related to its investment in qualified affordable housing projects.

Summary of Significant Accoun34

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Nature of Operations and Principles of Consolidation	Nature of Operations and Principles of Consolidation The Company provides financial services through its offices in the Ohio counties of Erie, Crawford, Champaign, Cuyahoga, Franklin, Logan, Summit, Huron, Ottawa, Madison, Montgomery and Richland. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are residential mortgage, commercial, and installment loans. Substantially all loans are secured by specific items of collateral including business assets, consumer assets and commercial and residential real estate. Commercial loans are expected to be repaid from cash flow from operations of businesses. There are no significant concentrations of loans to any one industry or customer. However, our customers’ ability to repay their loans is dependent on the real estate and general economic conditions in the area. Other financial instruments that potentially represent concentrations of credit risk include deposit accounts in other financial institutions. FCIA was formed to allow the Company to participate in commission revenue generated through its third party insurance agreement. Insurance commission revenue was less than 1.0% of total revenue for the years ended December 31, 2017, 2016 and 2015. WSP was formed to hold repossessed assets of CBI’s subsidiaries. WSP revenue was less than 1% of total revenue for the years ended December 31, 2017, 2016 and 2015. FCRS was formed in 2012 and remained inactive for the periods presented. CRMI was formed in 2017 to provide property and casualty insurance coverage to CBI and its’ subsidiaries for which insurance may not be currently available or economically feasible in the insurance marketplace. CRMI revenue was less than 1% of total revenue for the year ended December 31, 2017.
Use of Estimates	Use of Estimates
Cash Flows	Cash Flows
Securities	Securities NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated. Gains and losses on sales are based on the amortized cost of the security sold using the specific identification method. U.S. generally accepted accounting principles (“GAAP”) guidance specifies that if (a) a company does not have the intent to sell a debt security prior to recovery and (b) it is more-likely-than-not that it will not have to sell the debt security prior to recovery, the security would not be considered other-than-temporarily impaired unless there is a credit loss. When an entity does not intend to sell the security, and it is more-likely-than-not the entity will not have to sell the security before recovery of its cost basis, it will recognize the credit component of other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. For held-to-maturity debt securities, the amount of other-than-temporary impairment recorded in other comprehensive income for the non-credit portion of a previous other-than-temporary impairment should be amortized prospectively over the remaining life of the security on the basis of the timing of future estimated cash flows of the security. For available-for-sale debt securities that management has no intent to sell and believes that it more-likely-than-not will not be required to sell prior to recovery, only the credit loss component of the impairment is recognized in earnings, while the non-credit loss is recognized in accumulated other comprehensive income. The credit loss component recognized in earnings is identified as the amount of principal cash flows not expected to be received over the remaining term of the security as projected based on cash flow projections. Other securities which include FHLB stock, Federal Reserve Bank (“FRB”) stock, Federal Agricultural Mortgage Corporation stock, Bankers’ Bancshares Inc. (“BB”) stock, and Norwalk Community Development Corp (“NCDC”) stock are carried at cost.
Loans Held for Sale	Loans Held for Sale:
Loans	Loans: Interest income on mortgage and commercial loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Interest income on consumer loans is discontinued when management determines future collection is unlikely. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued, but not received, for loans placed on nonaccrual, is reversed against interest income. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Purchased Loans	Purchased Loans: Purchased loans are accounted for individually or aggregated into pools of loans based on common risk characteristics (e.g., credit score, loan type, and date of origination). The Company estimates the amount and timing of expected cash flows for each purchased loan or pool, and the expected cash flows in excess of amount paid is recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loan’s, or pool’s, contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded. If the present value of expected future cash flows is greater than the carrying amount, the excess is recognized as part of future interest income.
Allowance for Loan Losses	Allowance for Loan Losses: All commercial, commercial real estate and farm real estate loans are monitored on a regular basis with a detailed loan review completed for all loan relationships greater than $750. All commercial, commercial real estate and farm real estate loans that are 90 days past due or in nonaccrual status, are analyzed to determine if they are “impaired”, which means that it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. All loans that are delinquent 90 days are classified as substandard and placed on nonaccrual status unless they are well-secured and in the process of collection. The remaining loans are evaluated and segmented with loans with similar risk characteristics. The Company allocates reserves based on risk categories and portfolio segments described below, which conform to the Company’s asset classification policy. In reviewing risk within Civista’s loan portfolio, management has identified specific segments to categorize loan portfolio risk: (i) Commercial & Agriculture loans; (ii) Commercial Real Estate – Owner Occupied loans; (iii) Commercial Real Estate – Non-Owner Occupied loans; (iv) Residential Real Estate loans; (v) Real Estate Construction loans; (vi) Farm Real Estate loans; and (vii) Consumer and Other loans. Additional information related to economic factors can be found in Note 5.
Loan Charge-off Policies	Loan Charge-off Policies:
Troubled Debt Restructurings	Troubled Debt Restructurings:
Other Real Estate	Other Real Estate:
Premises and Equipment	Premises and Equipment:
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock a b c d
Federal Reserve Bank Stock	Federal Reserve Bank Stock
Bank Owned Life Insurance (BOLI)	Bank Owned Life Insurance (BOLI)
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets: Other intangible assets consist of core deposit intangibles arising from whole bank and branch acquisitions. These intangible assets are measured at fair value and then amortized on an accelerated method over their estimated useful lives, which range from five to twelve years.
Servicing Rights	Servicing Rights
Long-term Assets	Long-term Assets:
Repurchase Agreements	Repurchase Agreements
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments:
Income Taxes	Income Taxes The Company prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The Company recognizes interest and/or penalties related to income tax matters in income tax expense.
Stock-Based Compensation	Stock-Based Compensation Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.
Retirement Plans	Retirement Plans
Earnings per Common Share	Earnings per Common Share
Comprehensive Income	Comprehensive Income
Loss Contingencies	Loss Contingencies
Restrictions on Cash	Restrictions on Cash
Dividend Restriction	Dividend Restriction
Fair Value of Financial Instruments	Fair Value of Financial Instruments
Operating Segments	Operating Segments
Business Combinations	Business Combinations:
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Derivatives and Hedging
Reclassifications	Reclassifications:
Effect of Newly Issued but Not Yet Effective Accounting Standards	Effect of Newly Issued but Not Yet Effective Accounting Standards: In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers Revenue from Contracts with Customers In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) goodwill impairment tests in fiscal years beginning after December 15, 2021. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In March 2017, the FASB issued ASU 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20). In May 2017, the FASB issued ASU 2017-09, Compensation – Stock Compensation (Topic 718) In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivative and Hedging (Topic 815) Debt—Debt with Conversion and Other Options NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) For public business entities, the amendments in Part I of this Update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. For all other entities, the amendments in Part I of this Update are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted for all entities, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The amendments in Part I of this Update should be applied either retrospectively to outstanding financial instruments with a down-round feature by means of a cumulative-effect adjustment to the statement of financial position as of the beginning of the first fiscal year and interim period(s) in which the pending content that links to this paragraph is effective or retrospectively to outstanding financial instruments with a down-round feature for each prior reporting period presented in accordance with the guidance on accounting changes in paragraphs 250-10-45-5 through 45-10. The amendments in Part II of this Update do not require any transition guidance because those amendments do not have an accounting effect. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 850) In September 2017, the FASB issued ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842 Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments. Revenue from Contracts with Customers Leases In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued) requirements for the amendments are the same as the effective date and transition requirements in ASU 2016-02. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220) An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018 (Tax Cuts and Jobs Act)

Merger (Tables)

Merger (Tables)	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Schedule of Financial Information for Former TCNB Included in Consolidated Statement of Operations	The following table presents financial information for the former TCNB included in the Consolidated Statements of Operations from the date of acquisition through December 31, 2015. Actual From Acquisition Date Through December 31, 2015 (in thousands) Net interest income after provision for loan losses $ 3,155 Noninterest income 138 Net income 1,282
Business Acquisition, Unaudited Pro Forma Information	The following table presents unaudited pro forma information for the periods ended December 31, 2017, 2016 and 2015 as if the acquisition of TCNB had occurred on January 1, 2015. This table has been prepared for comparative purposes only and is not indicative of the actual results that would have been attained had the acquisition occurred as of the beginning of the periods presented, nor is it indicative of future results. Pro Formas (unaudited) Twelve months ended December 31, 2017 2016 2015 Net interest income after provision for loan losses $ 54,456 $ 51,389 $ 46,852 Noninterest income 16,334 16,132 14,699 Net income 15,769 16,949 11,931 Pro forma earnings per share: Basic $ 1.47 $ 1.93 $ 1.32 Diluted $ 1.28 $ 1.55 $ 1.09
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the date of acquisition for TCNB. Core deposit intangibles will be amortized over periods of between five and ten years using an accelerated method. Goodwill will not be amortized, but instead will be evaluated for impairment. At March 6, 2015 Total purchase price $ 17,226 Net assets acquired: Cash and short-term investments 18,152 Loans, net 76,444 Other securities 716 Premises and equipment 1,738 Accrued interest receivable 194 Core deposit intangible 1,009 Other assets 472 Noninterest-bearing deposits (18,263 ) Interest-bearing deposits (68,606 ) Other liabilities (5 ) 11,851 Goodwill $ 5,375

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
Available for Sale Securities	The amortized cost and fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive loss were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2017 U.S. Treasury securities and obligations of U.S.government agencies $ 30,450 $ 100 $ (192 ) $ 30,357 Obligations of states and political subdivisions 114,002 4,226 (172 ) 118,056 Mortgage-back securities in government sponsored entities 82,098 408 (690 ) 81,817 Total debt securities 226,550 4,734 (1,054 ) 230,230 Equity securities in financial institutions 481 351 — 832 Total $ 227,031 $ 5,085 $ (1,054 ) $ 231,062 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2016 U.S. Treasury securities and obligations of U.S.government agencies $ 37,406 $ 117 $ (77 ) $ 37,446 Obligations of states and political subdivisions 92,177 3,395 (574 ) 94,998 Mortgage-back securities in government sponsored entities 62,756 483 (597 ) 62,642 Total debt securities 192,339 3,995 (1,248 ) 195,086 Equity securities in financial institutions 481 297 — 778 Total $ 192,820 $ 4,292 $ (1,248 ) $ 195,864
Fair Value of Securities by Contractual Maturity	The amortized cost and fair value of securities at year end 2017 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. Available for sale Amortized Cost Fair Value Due in one year or less $ 8,787 $ 8,765 Due from one to five years 27,662 27,691 Due from five to ten years 30,167 31,622 Due after ten years 77,836 80,335 Mortgage-backed securities in government sponsored entities 82,098 81,817 Equity securities in financial institutions 481 832 Total $ 227,031 $ 231,062
Proceeds from Sales of Securities, Gross Realized Gains and Losses	Proceeds from sales of securities, gross realized gains and gross realized losses were as follows: 2017 2016 2015 Sale proceeds $ 953 $ 4,349 $ — Gross realized gains — 18 — Gross realized losses — — — Gains (losses) from securities called or settled by the issuer 12 1 (18 )
Securities with Unrealized Losses Not Recognized in Income	Debt securities with unrealized losses at year end 2017 and 2016 not recognized in income are as follows: 2017 12 Months or less More than 12 months Total Description of Securities Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss U.S. Treasury securities and obligations of U.S. government agencies $ 20,449 $ (100 ) $ 6,617 $ (92 ) $ 27,066 $ (192 ) Obligations of states and political subdivisions 4,057 (41 ) 7,309 (131 ) 11,366 (172 ) Mortgage-backed securities in gov’t sponsored entities 29,534 (195 ) 22,199 (495 ) 51,733 (690 ) Total temporarily impaired $ 54,040 $ (336 ) $ 36,125 $ (718 ) $ 90,165 $ (1,054 ) 2016 12 Months or less More than 12 months Total Description of Securities Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss U.S. Treasury securities and obligations of U.S. government agencies $ 13,271 $ (61 ) $ 893 $ (16 ) $ 14,164 $ (77 ) Obligations of states and political subdivisions 17,167 (558 ) 519 (16 ) 17,686 (574 ) Mortgage-backed securities in gov’t sponsored entities 35,453 (566 ) 2,849 (31 ) 38,302 (597 ) Total temporarily impaired $ 65,891 $ (1,185 ) $ 4,261 $ (63 ) $ 70,152 $ (1,248 )

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Loan Balances	Loans at year-end were as follows: 2017 2016 Commercial and Agriculture $ 152,473 $ 135,462 Commercial Real Estate - owner occupied 164,099 161,364 Commercial Real Estate - non-owner occupied 425,623 395,931 Residential Real Estate 268,735 247,308 Real Estate Construction 97,531 56,293 Farm Real Estate 39,461 41,170 Consumer and Other 16,739 17,978 Total Loans 1,164,661 1,055,506 Allowance for loan losses (13,134 ) (13,305 ) Net loans $ 1,151,527 $ 1,042,201
Loans to Directors and Executive Officers Including Immediate Families	Loans to principal officers, directors, and their affiliates at year-end 2017 and 2016 were as follows: 2017 2016 Balance - Beginning of year $ 14,389 $ 15,147 New loans and advances 2,344 850 Repayments (1,256 ) (1,575 ) Effect of changes to related parties (1,475 ) (33 ) Balance - End of year $ 14,002 $ 14,389

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Changes in the Allowance for Loan Losses and Loan Balances Outstanding	The following tables present, by portfolio segment, the changes in the allowance for loan losses, the ending allocation of the allowance for loan losses and the loan balances outstanding for the years ended December 31, 2017, 2016 and 2015. The changes can be impacted by overall loan volume, adversely graded loans, historical charge-offs and economic factors NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Allowance for loan losses: December 31, 2017 Beginning balance Charge-offs Recoveries Provision (Credit) Ending Balance Commercial & Agriculture $ 2,018 $ (11 ) $ 372 $ (817 ) $ 1,562 Commercial Real Estate: Owner Occupied 2,171 (328 ) 69 131 2,043 Non-Owner Occupied 4,606 (38 ) 46 693 5,307 Residential Real Estate 3,089 (400 ) 194 (973 ) 1,910 Real Estate Construction 420 — 44 370 834 Farm Real Estate 442 — 3 (15 ) 430 Consumer and Other 314 (165 ) 43 98 290 Unallocated 245 — — 513 758 Total $ 13,305 $ (942 ) $ 771 $ — $ 13,134 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Allowance for loan losses: December 31, 2016 Beginning balance Charge-offs Recoveries Provision (Credit) Ending Balance Commercial & Agriculture $ 1,478 $ (880 ) $ 105 $ 1,315 $ 2,018 Commercial Real Estate: Owner Occupied 2,467 (228 ) 56 (124 ) 2,171 Non-Owner Occupied 4,657 (23 ) 1,372 (1,400 ) 4,606 Residential Real Estate 4,086 (455 ) 479 (1,021 ) 3,089 Real Estate Construction 371 (115 ) 12 152 420 Farm Real Estate 538 — — (96 ) 442 Consumer and Other 382 (125 ) 46 11 314 Unallocated 382 — — (137 ) 245 Total $ 14,361 $ (1,826 ) $ 2,070 $ (1,300 ) $ 13,305 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Allowance for loan losses: December 31, 2015 Beginning balance Charge-offs Recoveries Provision (Credit) Ending Balance Commercial & Agriculture $ 1,819 $ (190 ) $ 182 $ (333 ) $ 1,478 Commercial Real Estate: Owner Occupied 2,221 (523 ) 187 582 2,467 Non-Owner Occupied 4,334 (81 ) 115 289 4,657 Residential Real Estate 3,747 (1,135 ) 331 1,143 4,086 Real Estate Construction 428 — 5 (62 ) 371 Farm Real Estate 822 — 76 (360 ) 538 Consumer and Other 200 (120 ) 46 256 382 Unallocated 697 — — (315 ) 382 Total $ 14,268 $ (2,049 ) $ 942 $ 1,200 $ 14,361 The following tables present, by portfolio segment, the allocation of the allowance for loan losses and related loan balances as of December 31, 2017 and December 31, 2016. December 31, 2017 Loans acquired with credit deterioration Loans individually evaluated for impairment Loans collectively evaluated for impairment Total Allowance for loan losses: Commercial & Agriculture $ 82 $ 4 $ 1,476 $ 1,562 Commercial Real Estate: Owner Occupied — 6 2,037 2,043 Non-Owner Occupied — — 5,307 5,307 Residential Real Estate 44 109 1,757 1,910 Real Estate Construction — — 834 834 Farm Real Estate — 6 424 430 Consumer and Other — — 290 290 Unallocated — — 758 758 Total $ 126 $ 125 $ 12,883 $ 13,134 Outstanding loan balances: Commercial & Agriculture $ 87 $ 438 $ 151,948 $ 152,473 Commercial Real Estate: Owner Occupied — 1,010 163,089 164,099 Non-Owner Occupied — 44 425,579 425,623 Residential Real Estate 128 1,360 267,247 268,735 Real Estate Construction — — 97,531 97,531 Farm Real Estate — 608 38,853 39,461 Consumer and Other — — 16,739 16,739 Total $ 215 $ 3,460 $ 1,160,986 $ 1,164,661 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) December 31, 2016 Loans acquired with credit deterioration Loans individually evaluated for impairment Loans collectively evaluated for impairment Total Allowance for loan losses: Commercial & Agriculture $ 86 $ 82 $ 1,850 $ 2,018 Commercial Real Estate: Owner Occupied — 4 2,167 2,171 Non-Owner Occupied — — 4,606 4,606 Residential Real Estate 89 102 2,898 3,089 Real Estate Construction — — 420 420 Farm Real Estate — — 442 442 Consumer and Other — — 314 314 Unallocated — — 245 245 Total $ 175 $ 188 $ 12,942 $ 13,305 Outstanding loan balances: Commercial & Agriculture $ 88 $ 1,983 $ 133,391 $ 135,462 Commercial Real Estate: Owner Occupied — 1,896 159,468 161,364 Non-Owner Occupied — 359 395,572 395,931 Residential Real Estate 168 1,686 245,454 247,308 Real Estate Construction — — 56,293 56,293 Farm Real Estate — 614 40,556 41,170 Consumer and Other — 1 17,977 17,978 Total $ 256 $ 6,539 $ 1,048,711 $ 1,055,506
Credit Exposures by Internally Assigned Grades	December 31, 2017 Pass Special Mention Substandard Doubtful Ending Balance Commercial & Agriculture $ 140,842 $ 8,412 $ 3,219 $ — $ 152,473 Commercial Real Estate: Owner Occupied 155,756 1,166 7,177 — 164,099 Non-Owner Occupied 422,363 2,321 939 — 425,623 Residential Real Estate 62,628 1,997 5,873 — 70,498 Real Estate Construction 91,545 15 27 — 91,587 Farm Real Estate 25,228 11,236 2,997 — 39,461 Consumer and Other 1,312 — 70 — 1,382 Total $ 899,674 $ 25,147 $ 20,302 $ — $ 945,123 December 31, 2016 Pass Special Mention Substandard Doubtful Ending Balance Commercial & Agriculture $ 127,867 $ 4,300 $ 3,295 $ — $ 135,462 Commercial Real Estate: Owner Occupied 151,659 4,016 5,689 — 161,364 Non-Owner Occupied 393,592 1,676 663 — 395,931 Residential Real Estate 59,015 1,661 6,911 — 67,587 Real Estate Construction 50,678 16 27 — 50,721 Farm Real Estate 31,814 5,673 3,683 — 41,170 Consumer and Other 2,135 — 109 — 2,244 Total $ 816,760 $ 17,342 $ 20,377 $ — $ 854,479
Performing and Nonperforming Loans	Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months. December 31, 2017 Residential Real Estate Real Estate Construction Consumer and Other Total Performing $ 198,237 $ 5,944 $ 15,341 $ 219,522 Nonperforming — — 16 16 Total $ 198,237 $ 5,944 $ 15,357 $ 219,538 December 31, 2016 Residential Real Estate Real Estate Construction Consumer and Other Total Performing $ 179,721 $ 5,572 $ 15,725 $ 201,018 Nonperforming — — 9 9 Total $ 179,721 $ 5,572 $ 15,734 $ 201,027
Aging Analysis of Past Due Loans	The following tables include an aging analysis of the recorded investment of past due loans outstanding as of December 31, 2017 and 2016. December 31, 2017 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Total Past Due Current Purchased Credit- Impaired Loans Total Loans Past Due 90 Days and Accruing Commercial & Agriculture $ 575 $ 2 $ 685 $ 1,262 $ 151,124 $ 87 $ 152,473 $ — Commercial Real Estate: Owner Occupied 897 104 484 1,485 162,614 — 164,099 — Non-Owner Occupied 133 — 470 603 425,020 — 425,623 — Residential Real Estate 1,613 229 785 2,627 265,980 128 268,735 — Real Estate Construction — — 27 27 97,504 — 97,531 — Farm Real Estate 27 — 186 213 39,248 — 39,461 — Consumer and Other 92 96 16 204 16,535 — 16,739 16 Total $ 3,337 $ 431 $ 2,653 $ 6,421 $ 1,158,025 $ 215 $ 1,164,661 $ 16 December 31, 2016 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Total Past Due Current Purchased Credit- Impaired Loans Total Loans Past Due 90 Days and Accruing Commercial & Agriculture $ 156 $ 20 $ 152 $ 328 $ 135,046 $ 88 $ 135,462 $ — Commercial Real Estate: Owner Occupied 722 553 280 1,555 159,809 — 161,364 — Non-Owner Occupied 147 — 316 463 395,468 — 395,931 — Residential Real Estate 1,812 507 1,049 3,368 243,772 168 247,308 — Real Estate Construction — — 27 27 56,266 — 56,293 — Farm Real Estate 93 — — 93 41,077 — 41,170 — Consumer and Other 215 31 31 277 17,701 — 17,978 9 Total $ 3,145 $ 1,111 $ 1,855 $ 6,111 $ 1,049,139 $ 256 $ 1,055,506 $ 9
Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans	The following table presents loans on nonaccrual status, excluding purchased credit-impaired (PCI) loans, as of December 31, 2017 and 2016. 2017 2016 Commercial & Agriculture $ 887 $ 1,622 Commercial Real Estate: Owner Occupied 1,476 1,461 Non-Owner Occupied 711 464 Residential Real Estate 2,778 3,266 Real Estate Construction 27 27 Farm Real Estate 186 2 Consumer and Other 67 101 Total $ 6,132 $ 6,943
Schedule of Troubled Debt Restructurings	Loan modifications that are considered TDRs completed during the twelve month periods ended December 31, 2017, 2016 and 2015 were as follows: For the Twelve Month Period Ended December 31, 2017 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Commercial & Agriculture — $ — $ — Commercial Real Estate: Owner Occupied — — — Non-Owner Occupied — — — Residential Real Estate 1 13 13 Real Estate Construction — — — Farm Real Estate — — — Consumer and Other — — — Total Loan Modifications 1 $ 13 $ 13 For the Twelve Month Period Ended December 31, 2016 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Commercial & Agriculture 4 $ 529 $ 529 Commercial Real Estate: Owner Occupied — — — Non-Owner Occupied — — — Residential Real Estate 2 308 308 Real Estate Construction — — — Farm Real Estate 3 700 700 Consumer and Other — — — Total Loan Modifications 9 $ 1,537 $ 1,537 For the Twelve Month Period Ended December 31, 2015 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Commercial & Agriculture — $ — $ — Commercial Real Estate: Owner Occupied — — — Non-Owner Occupied — — — Residential Real Estate — — — Real Estate Construction 1 41 41 Farm Real Estate — — — Consumer and Other — — — Total Loan Modifications 1 $ 41 $ 41
Impaired Financing Receivables Excluding PCI Loans	The following tables include the recorded investment and unpaid principal balances for impaired financing receivables, excluding PCI loans, with the associated allowance amount, if applicable, as of December 31, 2017 and 2016. December 31, 2017 December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded: Commercial & Agriculture $ — $ — $ 1,230 $ 1,751 Commercial Real Estate: Owner Occupied 693 913 1,658 1,803 Non-Owner Occupied 44 48 359 386 Residential Real Estate 977 1,049 1,259 1,590 Farm Real Estate 148 148 614 614 Consumer and Other — — 1 1 Total 1,862 2,158 5,121 6,145 With an allowance recorded: Commercial & Agriculture 438 438 $ 4 753 1,303 $ 82 Commercial Real Estate: Owner Occupied 317 317 6 238 238 4 Non-Owner Occupied — — — — — — Residential Real Estate 383 387 109 427 431 102 Farm Real Estate 460 460 6 — — — Total 1,598 1,602 125 1,418 1,972 188 Total: Commercial & Agriculture 438 438 4 1,983 3,054 82 Commercial Real Estate: Owner Occupied 1,010 1,230 6 1,896 2,041 4 Non-Owner Occupied 44 48 — 359 386 — Residential Real Estate 1,360 1,436 109 1,686 2,021 102 Farm Real Estate 608 608 6 614 614 — Consumer and Other — — — 1 1 — Total $ 3,460 $ 3,760 $ 125 $ 6,539 $ 8,117 $ 188 NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) The following tables include the average recorded investment and interest income recognized for impaired financing receivables as of, and for the years ended, December 31, 2017, 2016 and 2015. For the year ended: December 31, 2017 December 31, 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial & Agriculture $ 1,375 $ 34 $ 2,036 $ 40 Commercial Real Estate: Owner Occupied 1,507 75 1,847 862 Non-Owner Occupied 233 6 1,039 83 Residential Real Estate 1,515 73 1,787 175 Real Estate Construction — — — 1 Farm Real Estate 613 28 1,006 95 Consumer and Other — — 2 — Total $ 5,243 $ 216 $ 7,717 $ 1,256 For the year ended: December 31, 2015 Average Recorded Investment Interest Income Recognized Commercial & Agriculture $ 1,519 $ 54 Commercial Real Estate: Owner Occupied 2,738 139 Non-Owner Occupied 1,946 32 Residential Real Estate 2,544 103 Real Estate Construction 16 — Farm Real Estate 653 56 Consumer and Other 4 — Total $ 9,420 $ 384
Schedule of Changes in Amortized Yield for PCI Loans	NOTE 5 - ALLOWANCE FOR LOAN LOSSES (Continued) Changes in the amortizable yield for PCI loans were as follows, since acquisition: At December 31, 2017 At December 31, 2016 (In Thousands) (In Thousands) Balance at beginning of period $ 49 $ 80 Acquisition of PCI loans — — Accretion (34 ) (31 ) Balance at end of period $ 15 $ 49
Schedule of Loans Acquired and Accounted	The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30: At December 31, 2017 At December 31, 2016 Acquired Loans with Specific Evidence of Deterioration of Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence of Deterioration of Credit Quality (ASC 310-30) (In Thousands) Outstanding balance $ 775 $ 850 Carrying amount 215 256

Other Comprehensive Income (L39

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Changes in Each Component of Accumulated Other Comprehensive Loss, Net of Tax	The following table presents the changes in each component of accumulated other comprehensive loss, net of tax, as of December 31, 2017, 2016 and 2015. For the Year Ended December 31, 2017 For the Year Ended December 31, 2016 For the Year Ended December 31, 2015 Unrealized Gains and Losses on Available for Sale Securities Defined Benefit Pension Items Total Unrealized Gains and Losses on Available for Sale Securities Defined Benefit Pension Items Total Unrealized Gains and Losses on Available for Sale Securities Defined Benefit Pension Items Total Beginning balance $ 2,008 $ (4,345 ) $ (2,337 ) $ 3,554 $ (4,049 ) $ (495 ) $ 3,730 $ (3,777 ) $ (47 ) Other comprehensive income (loss) before reclassifications 620 553 1,173 (1,533 ) (511 ) (2,044 ) (188 ) (449 ) (637 ) Amounts reclassified from accumulated other comprehensive loss (8 ) 247 239 (13 ) 215 202 12 177 189 Net current-period other comprehensive income (loss) 612 800 1,412 (1,546 ) (296 ) (1,842 ) (176 ) (272 ) (448 ) Reclassification of certain income tax effects from accumulated other comprehensive loss 565 (764 ) (199 ) — — — — — — Ending balance $ 3,185 $ (4,309 ) $ (1,124 ) $ 2,008 $ (4,345 ) $ (2,337 ) $ 3,554 $ (4,049 ) $ (495 )
Amounts Reclassified Out of Each Component of Accumulated Other Comprehensive Loss	The following table presents the amounts reclassified out of each component of accumulated other comprehensive loss as of December 31, 2017, 2016 and 2015. Amount Reclassified from Accumulated Other Comprehensive Loss (a) For the year ended December 31, Details about Accumulated Other Comprehensive Loss Components 2017 2016 2015 Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on available-for-sale securities $ 12 $ 19 $ (18 ) Net gain (loss) on sale of securities Tax effect (4 ) (6 ) 6 Income taxes 8 13 (12 ) Amortization of defined benefit pension items Actuarial losses (380 ) (b) (326 ) (b) (270 ) (b) Salaries, wages and benefits Tax effect 133 111 93 Income taxes (247 ) (215 ) (177 ) Total reclassifications for the period $ (239 ) $ (202 ) $ (189 ) (a) Amounts in parentheses indicate expenses and other amounts indicate income. (b) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost.

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Year-End Premises and Equipment	Year-end premises and equipment were as follows: 2017 2016 Land and improvements $ 5,022 $ 5,094 Buildings and improvements 21,221 20,266 Furniture and equipment 17,004 16,070 Total 43,247 41,430 Accumulated depreciation (25,636 ) (23,510 ) Premises and equipment, net $ 17,611 $ 17,920
Rent Commitments Under Non-Cancelable Operating Leases	Rent expense was $580, $540 and $506 for 2017, 2016 and 2015, respectively. Rent commitments under non-cancelable operating leases at December 31, 2017 were as follows, before considering renewal options that generally are present. 2018 $ 571 2019 479 2020 226 2021 91 2022 36 Total $ 1,403

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Acquired Intangible Assets	NOTE 8 - GOODWILL AND INTANGIBLE ASSETS (Continued) Acquired intangible assets were as follows as of year end. 2017 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized intangible assets(1): MSRs $ 1,065 $ 322 $ 743 $ 912 $ 250 $ 662 Core deposit intangibles 7,274 6,738 536 7,274 6,152 1,122 Total amortized intangible assets $ 8,339 $ 7,060 $ 1,279 $ 8,186 $ 6,402 $ 1,784 (1) Excludes fully amortized intangible assets
Schedule of Estimated Amortization Expense	Estimated amortization expense for each of the next five years and thereafter is as follows: MSRs Core deposit intangibles Total 2018 $ 41 $ 111 $ 152 2019 41 88 129 2020 41 71 112 2021 41 68 109 2022 41 68 109 Thereafter 538 130 668 $ 743 $ 536 $ 1,279

Interest-Bearing Deposits (Tabl

Interest-Bearing Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Summary of Interest-Bearing Deposits	Interest-bearing deposits as of December 31, 2017 and 2016 were as follows: 2017 2016 Demand $ 183,680 $ 183,759 Statement and Passbook Savings 435,377 384,330 Certificates of Deposit: $250 and over 8,206 13,640 Other 192,455 168,723 Individual Retirement Accounts 23,241 25,063 Total $ 842,959 $ 775,515
Scheduled Maturities of Certificates of Deposit	Scheduled maturities of certificates of deposit, including IRA’s at December 31, 2017 were as follows: 2018 $ 161,656 2019 41,926 2020 15,459 2021 3,382 2022 1,202 Thereafter 277 Total $ 223,902

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Summary of Federal Funds Purchased and Other Short-term Borrowings	Short-term borrowings, which consist of federal funds purchased and other short-term borrowings are summarized as follows: At December 31, 2017 At December 31, 2016 Federal Funds Purchased Short-term Borrowings Federal Funds Purchased Short-term Borrowings Outstanding balance at year end $ — $ 56,900 $ — $ 31,000 Maximum indebtedness during the year 20,000 115,050 20,000 70,400 Average balance during the year 119 38,825 116 10,483 Average rate paid during the year 1.68 % 1.12 % 0.86 % 0.42 % Interest rate on year end balance — 1.42 % — 0.64 % At December 31, 2015 Federal Funds Purchased Short-term Borrowings Outstanding balance at year end $ — $ 53,700 Maximum indebtedness during the year — 64,700 Average balance during the year 69 26,880 Average rate paid during the year 0.53 % 0.20 % Interest rate on year end balance — 0.35 %

Federal Home Loan Bank Advanc44

Federal Home Loan Bank Advances (Tables)	12 Months Ended
	Dec. 31, 2017
Banking And Thrift [Abstract]
Scheduled Principal Reductions of Federal Home Loan Bank Advances Outstanding	NOTE 11 - FEDERAL HOME LOAN BANK ADVANCES (Continued) Scheduled principal reductions of FHLB advances outstanding at December 31, 2017 were as follows: 2018 $ 10,000 2019 5,000 Total $ 15,000

Securities Sold Under Agreeme45

Securities Sold Under Agreements to Repurchase (Tables)	12 Months Ended
	Dec. 31, 2017
Brokers And Dealers [Abstract]
Summary of Securities Pledged as Collateral Under Repurchase Agreements	The following table presents detail regarding the securities pledged as collateral under repurchase agreements as of December 31, 2017 and 2016. All of the repurchase agreements are overnight agreements. December 31, 2017 December 31, 2016 Securities pledged for repurchase agreements: U.S. Treasury securities $ 874 $ 1,761 Obligations of U.S. government agencies 20,881 27,164 Total securities pledged $ 21,755 $ 28,925 Gross amount of recognized liabilities for repurchase agreements $ 21,755 $ 28,925 Amounts related to agreements not included in offsetting disclosures above $ — $ —
Schedule of Securities Sold Under Agreements to Repurchase	Information concerning securities sold under agreements to repurchase was as follows: 2017 2016 2015 Outstanding balance at year end $ 21,755 $ 28,925 $ 25,040 Average balance during the year 18,234 21,767 20,086 Average interest rate during the year 0.10 % 0.10 % 0.10 % Maximum month-end balance during the year $ 23,889 $ 28,925 $ 25,040 Weighted average interest rate at year end 0.10 % 0.10 % 0.10 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Income Tax	Income taxes were as follows for the years ended December 31: 2017 2016 2015 Current $ 5,414 $ 6,449 $ 5,191 Deferred 435 170 (410 ) Change in corporate tax rate 511 — — Income taxes $ 6,360 $ 6,619 $ 4,781
Effective Tax Rates Differ from Statutory Federal Income Tax Rate	Effective tax rates differ from the statutory federal income tax rate of 35% in 2017 and 2016 and 34% in 2015 due to the following: 2017 2016 2015 Income taxes computed at the statutory federal tax rate $ 7,781 $ 8,343 $ 5,959 Add (subtract) tax effect of: Nontaxable interest income, net of nondeductible interest expense (1,107 ) (946 ) (900 ) Low income housing tax credit (686 ) (435 ) (303 ) Cash surrender value of BOLI (201 ) (197 ) (159 ) Change in corporate tax rate 511 — — Other 62 (146 ) 184 Income tax expense $ 6,360 $ 6,619 $ 4,781
Summary of Deferred Tax Assets and Liabilities	Year-end deferred tax assets and liabilities were due to the following: 2017 2016 Deferred tax assets Allowance for loan losses $ 2,848 $ 4,640 Deferred compensation 1,213 1,762 Intangible assets 95 187 Pension costs — 277 Other 141 102 Deferred tax asset 4,297 6,968 Deferred tax liabilities Tax depreciation in excess of book depreciation (275 ) (97 ) Discount accretion on securities (43 ) (58 ) Purchase accounting adjustments (536 ) (1,091 ) FHLB stock dividends (1,053 ) (1,705 ) Unrealized gain on securities available for sale (847 ) (1,035 ) Pension costs (293 ) — Prepaids (320 ) — Other (166 ) (256 ) Deferred tax liability (3,533 ) (4,242 ) Net deferred tax asset $ 764 $ 2,726

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Information about Pension Plan	Information about the pension plan is as follows: 2017 2016 Change in benefit obligation: Beginning benefit obligation $ 16,964 $ 16,328 Service cost — — Interest cost 679 689 Curtailment gain — — Settlement loss 46 51 Actuarial (gain)/loss 986 669 Benefits paid (759 ) (773 ) Ending benefit obligation 17,916 16,964 Change in plan assets, at fair value: Beginning plan assets 16,150 15,647 Actual return 1,947 802 Employer contribution 2,000 500 Benefits paid (759 ) (773 ) Administrative expenses (32 ) (26 ) Ending plan assets 19,306 16,150 Funded status at end of year $ 1,390 $ (814 )
Components of Net Periodic Pension Expense	The components of net periodic pension expense were as follows: 2017 2016 2015 Service cost $ — $ — $ — Interest cost 679 689 604 Expected return on plan assets (1,178 ) (1,090 ) (1,088 ) Net amortization and deferral 380 326 270 Net periodic pension cost (benefit) $ (119 ) $ (75 ) $ (214 ) Net loss (gain) recognized in other comprehensive loss $ (322 ) $ 448 $ 412 Total recognized in net periodic benefit cost and other comprehensive loss (before tax) $ (441 ) $ 373 $ 198
Schedule of Target Allocation and Expected Long-Term Rate of Return by Asset Category	The Company’s pension plan asset allocation at year-end 2017 and 2016 and target allocation for 2018 by asset category are as follows: Target Allocation Percentage of Plan Assets at Year-end Asset Category 2018 2017 2016 Equity securities 20-50 % 48.0 % 47.5 % Debt securities 30-60 51.9 52.1 Money market funds 20-30 0.1 0.4 Total 100.0 % 100.0 %
Plan's Assets at Fair Value Hierarchy	The following tables set forth by level, within the fair value hierarchy, the pension plan’s assets at fair value as of December 31, 2017 and 2016: December 31, 2017 Level 1 Level 2 Level 3 Total Assets: Cash $ 113 $ — $ — $ 113 Bond mutual funds 23 — — 23 Common/collective trust: Bonds 9,980 — — 9,980 Equities 6,654 — — 6,654 Equity market funds: International 750 — — 750 Large cap 1,085 — — 1,085 Mid cap 269 — — 269 Small cap 432 — — 432 Total assets at fair value $ 19,306 $ — $ — $ 19,306
Summary of Expected Benefit Payments	Expected benefit payments, which reflect expected future service, are as follows: 2018 $ 1,903 2019 1,127 2020 650 2021 913 2022 1,182 2023 through 2027 4,723 Total $ 10,498
Benefit Obligations [Member]
Weighted Average Assumptions Used to Determine Benefit Obligations	The weighted average assumptions used to determine benefit obligations at year-end were as follows: 2017 2016 2015 Discount rate on benefit obligation 3.51 % 4.00 % 4.16 % Long-term rate of return on plan assets 7.00 % 7.00 % 7.00 % Rate of compensation increase 0.00 % 0.00 % 0.00 %
Net Periodic Pension Cost [Member]
Weighted Average Assumptions Used to Determine Benefit Obligations	The weighted average assumptions used to determine net periodic pension cost were as follows: 2017 2016 2015 Discount rate on benefit obligation 4.00 % 4.16 % 3.69 % Long-term rate of return on plan assets 7.00 % 7.00 % 7.00 % Rate of compensation increase 0.00 % 0.00 % 0.00 %

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Company's Restricted Stock	The following is a summary of the status of the Company’s restricted shares, and changes therein during the twelve months ended December 31, 2017 and 2016: December 31, 2017 December 31, 2016 Number of Restricted Shares Weighted Average Grant Date Fair Value Number of Restricted Shares Weighted Average Grant Date Fair Value Nonvested at beginning of period 37,050 $ 10.77 16,983 $ 10.82 Granted 17,898 22.15 28,864 10.75 Vested (12,810 ) 10.76 (5,657 ) 10.82 Forfeited — — (3,140 ) 10.87 Nonvested at end of period 42,138 15.60 37,050 10.77 NOTE 16 - EQUITY INCENTIVE PLAN (Continued) The following is a summary of the status of the Company’s awarded restricted shares as of December 31, 2017: At December 31, 2017 Date of Award Shares Remaining Expense Remaining Vesting Period (Years) January 15, 2016 10,260 $ 66 3.00 March 11, 2016 15,748 33 1.00 March 20, 2017 11,713 110 2.00 March 20, 2017 6,185 108 4.00 43,906 $ 317 2.79

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Assets Measured at Fair Value	Assets measured at fair value are summarized below. Fair Value Measurements at December 31, 2017 Using: (Level 1) (Level 2) (Level 3) Assets measured at fair value on a recurring basis: U.S. Treasury securities and obligations of U.S. Government agencies $ — $ 30,357 $ — Obligations of states and political subdivisions — 118,056 — Mortgage-backed securities in government sponsored entities — 81,817 — Equity securities in financial institutions — 832 — Fair value swap asset — 1,560 — Liabilities measured at fair value on a recurring basis: Fair value swap liability — 1,560 — Assets measured at fair value on a nonrecurring basis: Impaired Loans $ — $ — $ 1,040 Other Real Estate Owned — — 16 Fair Value Measurements at December 31, 2016 Using: (Level 1) (Level 2) (Level 3) Assets measured at fair value on a recurring basis: U.S. Treasury securities and obligations of U.S. Government agencies $ — $ 37,446 $ — Obligations of states and political subdivisions — 94,998 — Mortgage-backed securities in government sponsored entities — 62,642 — Equity securities in financial institutions — 778 — Fair value swap asset — 1,839 — Liabilities measured at fair value on a recurring basis: Fair value swap liability — 1,839 — Assets measured at fair value on a nonrecurring basis: Impaired Loans $ — $ — $ 952 Other Real Estate Owned — — 37
Quantitative Information about Level 3 Fair Value Measurements	NOTE 17 - FAIR VALUE MEASUREMENT (Continued) The following tables presents quantitative information about the Level 3 significant unobservable inputs for assets and liabilities measured at fair value on a nonrecurring basis at December 31, 2017 and 2016. Quantitative Information about Level 3 Fair Value Measurements December 31, 2017 Fair Value Valuation Technique Unobservable Input Range Weighted Average Impaired loans $ 1,040 Appraisal of collateral Appraisal adjustments 0% - 30% 16% Liquidation expense 0% - 10% 8% Holding period 0 - 30 months 20 months Other real estate owned $ 16 Appraisal of collateral Appraisal adjustments 10% - 30% 10% Liquidation expense 0% - 10% 10% Quantitative Information about Level 3 Fair Value Measurements December 31, 2016 Fair Value Valuation Technique Unobservable Input Range Weighted Average Impaired loans $ 952 Appraisal of collateral Appraisal adjustments 10% - 67% 64% Liquidation expense 0% - 10% 4% Holding period 0 - 30 months 19 months Other real estate owned $ 37 Appraisal of collateral Appraisal adjustments 10% - 30% 10% Liquidation expense 0% - 10% 10%
Carrying Amount and Fair Value of Financial Instruments	The carrying amount and fair value of financial instruments were as follows: December 31, 2017 Carrying Amount Total Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from financial institutions $ 40,519 $ 40,519 $ 40,519 $ — $ — Securities available for sale 231,062 231,062 — 231,062 — Loans, held for sale 2,197 2,197 2,197 — — Loans, net of allowance for loan losses 1,151,527 1,146,969 — — 1,146,969 Other securities 14,247 14,247 14,247 — — Bank owned life insurance 25,125 25,125 25,125 — — Accrued interest receivable 4,336 4,336 4,336 — — Swap asset 1,560 1,560 — 1,560 — Financial Liabilities: Nonmaturing deposits 981,021 981,021 981,021 — — Time deposits 223,902 223,626 — — 223,626 Short-term FHLB advances 56,900 56,900 56,900 — — Long-term FHLB advances 15,000 14,964 — — 14,964 Securities sold under agreement to repurchase 21,755 21,755 21,755 — — Subordinated debentures 29,427 31,052 — — 31,052 Accrued interest payable 410 410 410 — — Swap liability 1,560 1,560 — 1,560 — NOTE 17 - FAIR VALUE MEASUREMENT (Continued) December 31, 2016 Carrying Amount Total Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from financial institutions $ 36,695 $ 36,695 $ 36,695 $ — $ — Securities available for sale 195,864 195,864 — 195,864 — Loans, held for sale 2,268 2,268 2,268 — — Loans, net of allowance for loan losses 1,042,201 1,047,329 — — 1,047,329 Other securities 14,055 14,055 14,055 — — Bank owned life insurance 24,552 24,552 24,552 — — Accrued interest receivable 3,854 3,854 3,854 — — Swap asset 1,839 1,839 — 1,839 — Financial Liabilities: Nonmaturing deposits 913,677 913,677 913,677 — — Time deposits 207,426 207,784 — — 207,784 Short-term FHLB advances 31,000 31,000 31,000 — — Long-term FHLB advances 17,500 17,553 — — 17,553 Securities sold under agreement to repurchase 28,925 28,925 28,925 — — Subordinated debentures 29,427 27,414 — — 27,414 Accrued interest payable 181 181 181 — — Swap liability 1,839 1,839 — 1,839 —

Commitments, Contingencies an50

Commitments, Contingencies and Off-Balance-Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Contractual Amounts of Financial Instruments with Off-Balance-Sheet Risk	The contractual amount of financial instruments with off-balance-sheet risk was as follows at year-end. 2017 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to extend credit: Lines of credit and construction loans $ 4,982 $ 286,925 $ 6,905 $ 202,923 Overdraft protection 7 33,353 5 29,075 Letters of credit 624 2,637 600 349 $ 5,613 $ 322,915 $ 7,510 $ 232,347

Capital Requirements and Rest51

Capital Requirements and Restriction on Retained Earnings (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Actual Capital Levels and Minimum Required Capital Levels	The Company’s and Civista’s actual capital levels and minimum required capital levels at December 31, 2017 and 2016 were as follows: To Be Well Capitalized Under For Capital Prompt Corrective Actual Adequacy Purposes Action Purposes Amount Ratio Amount Ratio Amount Ratio 2017 Total Risk Based Capital Consolidated $ 200,772 16.6 % $ 97,025 8.0 % n/a n/a Civista 161,394 13.3 96,880 8.0 $ 121,100 10.0 % Tier I Risk Based Capital Consolidated 187,638 15.5 72,769 6.0 n/a n/a Civista 147,473 12.2 72,660 6.0 96,880 8.0 CET1 Risk Based Capital Consolidated 140,853 11.6 54,576 4.5 n/a n/a Civista 136,760 11.3 54,495 4.5 78,715 6.5 Leverage Consolidated 187,638 12.7 59,089 4.0 n/a n/a Civista 147,473 10.0 59,031 4.0 73,788 5.0 2016 Total Risk Based Capital Consolidated $ 155,145 14.2 % $ 87,436 8.0 % n/a n/a Civista 145,270 13.3 87,334 8.0 $ 109,168 10.0 % Tier I Risk Based Capital Consolidated 141,840 13.0 65,577 6.0 n/a n/a Civista 131,391 12.0 65,501 6.0 87,334 8.0 CET1 Risk Based Capital Consolidated 93,463 8.6 49,183 4.5 n/a n/a Civista 120,465 11.0 49,126 4.5 70,959 6.5 Leverage Consolidated 141,840 10.6 53,774 4.0 n/a n/a Civista 131,391 9.8 53,717 4.0 67,146 5.0

Parent Company Only Condensed52

Parent Company Only Condensed Financial Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Schedule of Condensed Balance Sheets	December 31, Condensed Balance Sheets 2017 2016 Assets: Cash $ 29,908 $ 4,747 Securities available for sale 832 778 Investment in bank subsidiary 167,192 149,965 Investment in nonbank subsidiaries 12,928 12,635 Other assets 5,212 1,226 Total assets $ 216,072 $ 169,351 Liabilities: Deferred income taxes and other liabilities $ 2,184 $ 2,308 Subordinated debentures 29,427 29,427 Total liabilities 31,611 31,735 Shareholders’ Equity: Preferred stock 17,358 18,950 Common stock 153,810 118,975 Accumulated earnings 31,652 19,263 Treasury Stock (17,235 ) (17,235 ) Accumulated other comprehensive loss (1,124 ) (2,337 ) Total shareholders’ equity 184,461 137,616 Total liabilities and shareholders’ equity $ 216,072 $ 169,351
Schedule of Condensed Statements of Operations	For the years ended December 31, Condensed Statements of Operations 2017 2016 2015 Dividends from bank subsidiaries $ — $ — $ 14,226 Interest expense (1,035 ) (884 ) (760 ) Pension expense (925 ) (184 ) (388 ) Other expense, net (1,071 ) (920 ) (1,755 ) Income (loss) before equity in undistributed net earnings of subsidiaries (3,031 ) (1,988 ) 11,323 Income tax benefit 1,407 676 959 Equity in undistributed net earnings of subsidiaries 17,496 18,529 463 Net income $ 15,872 $ 17,217 $ 12,745 Comprehensive income $ 17,284 $ 15,375 $ 12,297
Schedule of Condensed Statements of Cash Flows	For the years ended December 31, Condensed Statements of Cash Flows 2017 2016 2015 Operating activities: Net income $ 15,872 $ 17,217 $ 12,745 Adjustment to reconcile net income to net cash from (used for) operating activities: Change in other assets and other liabilities (2,147 ) 1,821 1,324 Gain on sale of fixed asets (66 ) — — Equity in undistributed net earnings of subsidiaries (17,496 ) (18,529 ) (463 ) Net cash (used for) from operating activities (3,837 ) 509 13,606 Investing activities: Proceeds from sale of premises and equipment 138 — — Acquisition and additional capitalization of subsidiary, net of cash acquired (275 ) — (16,637 ) Net cash used for investing activities (137 ) — (16,637 ) Financing activities: Cash paid on fractional shares on preferred stock conversion to common stock — (1 ) — Net proceeds from common stock issuance 32,821 — — Payment to repurchase common stock (4 ) — — Cash dividends paid (3,682 ) (3,254 ) (3,139 ) Net cash from (used for) financing activities 29,135 (3,255 ) (3,139 ) Net change in cash and cash equivalents 25,161 (2,746 ) (6,170 ) Cash and cash equivalents at beginning of year 4,747 7,493 13,663 Cash and cash equivalents at end of year $ 29,908 $ 4,747 $ 7,493

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings per Common Share	The factors used in the earnings per share computation follow. 2017 2016 2015 Basic Net income $ 15,872 $ 17,217 $ 12,745 Preferred stock dividends 1,244 1,501 1,577 Net income available to common shareholders—basic $ 14,628 $ 15,716 $ 11,168 Weighted average common shares outstanding—basic 9,906,856 8,010,399 7,822,369 Basic earnings per share $ 1.48 $ 1.96 $ 1.43 Diluted Net income available to common shareholders—basic $ 14,628 $ 15,716 $ 11,168 Preferred stock dividends on convertible preferred stock 1,244 1,501 1,577 Net income available to common shareholders—diluted $ 15,872 $ 17,217 $ 12,745 Weighted average common shares outstanding for earnings per common share basic 9,906,856 8,010,399 7,822,369 Add: dilutive effects of convertible preferred shares 2,445,760 2,940,562 3,095,966 Average shares and dilutive potential common shares outstanding—diluted 12,352,616 10,950,961 10,918,335 Diluted earnings per share $ 1.28 $ 1.57 $ 1.17

Quarterly Financial Data (Una54

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data	Interest Income Net Interest Income Net Income Basic Earnings per Common Share Diluted Earnings per Common Share 2017 First quarter (1)(2) $ 13,692 $ 12,892 $ 4,635 $ 0.47 $ 0.40 Second quarter (3)(4) 14,228 13,367 3,596 0.32 0.29 Third quarter (3) 14,836 13,680 3,660 0.33 0.29 Fourth quarter (3)(5) 15,838 14,563 3,981 0.36 0.30 2016 First quarter (1)(2) $ 13,053 $ 12,235 $ 4,725 $ 0.55 $ 0.43 Second quarter (5)(6) 13,739 12,940 5,181 0.61 0.47 Third quarter (7) 13,370 12,526 3,680 0.41 0.34 Fourth quarter (8) 13,405 12,558 3,631 0.39 0.33 (1) Interest income and net interest income increased due to loan volume and rate and volume on interest-bearing deposits in other banks. (2) Net income increased due to fees on tax refund processing program. ( 3 ) Interest income and net interest income increased due to increases in loan volume and rate. ( 4 ) Net income decreased due to a decrease in fees on the tax refund processing program. (5 ) Interest income and net interest income increased due to interest recoveries on non-performing loans. (6 ) Net income increased due to interest recoveries and provision credit. (7 ) Interest income, net interest income and net income decreased due to previous quarter interest recoveries and provision credit. ( 8 ) Interest income and net interest income increased due to loan volume and interest recoveries.

Derivative Hedging Instruments

Derivative Hedging Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Interest Rate Swap Transactions	The following table summarizes the Company’s interest rate swap positions and the impact of a 1 basis point change in interest rates as of December 31, 2017. Notional Amount Weighted Average Rate Received/ (Paid) Impact of a 1 basis point change in interest rates Repricing Frequency Derivative Assets $ 66,227 5.08 % $ 36 Monthly Derivative Liabilities (66,227 ) -5.08 % (36 ) Monthly Net Exposure $ — $ — The following table summarizes the Company’s interest rate swap positions and the impact of a 1 basis point change in interest rates as of December 31, 2016. Notional Amount Weighted Average Rate Received/ (Paid) Impact of a 1 basis point change in interest rates Repricing Frequency Derivative Assets $ 52,975 5.07 % $ 30 Monthly Derivative Liabilities (52,975 ) -5.07 % (30 ) Monthly Net Exposure $ — $ —

Summary of Significant Accoun56

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Segment$ / shares	Dec. 31, 2016	Dec. 31, 2015
Significant Accounting Policies [Line Items]
Allowance for loan losses related to commercial, commercial real estate and farm real estate loans	$ 750,000
Number of days reaching which loans are considered for nonaccrual status	90 days
Federal Home Loan Bank par value | $ / shares	$ 100
Number of operating segments | Segment	1
ASU 2018-02 [Member]
Significant Accounting Policies [Line Items]
Cumulative effect adjustment between retained earnings and accumulated other comprehensive income	$ 199,000
Unsecured Debt [Member]
Significant Accounting Policies [Line Items]
Retail loans past due charge off period	90 days
Secured Debt [Member]
Significant Accounting Policies [Line Items]
Residential real estate loans past due assessment of value period	180 days
Other Debt [Member]
Significant Accounting Policies [Line Items]
Loans past due charged down to the net realizable value period	90 days
Maximum [Member]
Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%	1.00%	1.00%
Original maturities for cash and cash equivalents	90 days
Estimated useful life of intangible assets	12 years
Percentage of increase on assets due to new accounting standard updates	1.00%
Percentage of increase on liabilities due to new accounting standard updates	1.00%
Maximum [Member] | Furniture and Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	7 years
Maximum [Member] | Buildings and Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	50 years
Maximum [Member] | WSP [Member]
Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%	1.00%	1.00%
Maximum [Member] | CIVB Risk Management, Inc. [Member]
Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	5 years
Minimum [Member] | Furniture and Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	3 years
Minimum [Member] | Buildings and Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	7 years

Merger - Additional Information

Merger - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Mar. 06, 2015	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Business Combinations [Line Items]
Goodwill			$ 27,095	$ 27,095
Merger related costs		$ 391
TCNB Financial Corp [Member]
Business Combinations [Line Items]
Cash paid for acquisition	$ 17,226
Acquisition value per share	$ 23.50
Total assets of TCNB prior to the merger	$ 97,479
Assets, loan	76,771
Assets, Deposit	86,708
Goodwill	5,375
Cash and short-term investments acquired	18,152
Loans acquired	76,444
Loans acquired with credit deterioration	831
Deposits acquired	$ 86,900
Minimum [Member]
Business Combinations [Line Items]
Core deposit intangibles and other intangibles, amortization period	5 years
Maximum [Member]
Business Combinations [Line Items]
Core deposit intangibles and other intangibles, amortization period	10 years

Merger - Schedule of Financial

Merger - Schedule of Financial Information for Former TCNB Financial Corp Included in Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								10 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, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Net interest income after provision for loan losses										$ 54,502	$ 51,559	$ 46,192
Noninterest income										16,334	16,132	14,278
Net income	$ 3,981	$ 3,660	$ 3,596	$ 4,635	$ 3,631	$ 3,680	$ 5,181	$ 4,725		$ 15,872	$ 17,217	$ 12,745
Former TCNB Financial Corp [Member]
Business Acquisition [Line Items]
Net interest income after provision for loan losses									$ 3,155
Noninterest income									138
Net income									$ 1,282

Merger - Business Acquisition,

Merger - Business Acquisition, Unaudited Pro Forma Information (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
Business Combination, Separately Recognized Transactions [Line Items]
Net interest income after provision for loan losses									$ 54,502	$ 51,559	$ 46,192
Noninterest income									16,334	16,132	14,278
Net income	$ 3,981	$ 3,660	$ 3,596	$ 4,635	$ 3,631	$ 3,680	$ 5,181	$ 4,725	$ 15,872	$ 17,217	$ 12,745
Basic	$ 0.36	$ 0.33	$ 0.32	$ 0.47	$ 0.39	$ 0.41	$ 0.61	$ 0.55	$ 1.48	$ 1.96	$ 1.43
Diluted	$ 0.30	$ 0.29	$ 0.29	$ 0.40	$ 0.33	$ 0.34	$ 0.47	$ 0.43	$ 1.28	$ 1.57	$ 1.17
Pro Forma [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net interest income after provision for loan losses									$ 54,456	$ 51,389	$ 46,852
Noninterest income									16,334	16,132	14,699
Net income									$ 15,769	$ 16,949	$ 11,931
Basic									$ 1.47	$ 1.93	$ 1.32
Diluted									$ 1.28	$ 1.55	$ 1.09

Merger - Schedule of Recognized

Merger - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Mar. 06, 2015	Dec. 31, 2017	Dec. 31, 2016
Net assets acquired:
Goodwill		$ 27,095	$ 27,095
TCNB Financial Corp [Member]
Business Acquisition [Line Items]
Total purchase price	$ 17,226
Net assets acquired:
Cash and short-term investments	18,152
Loans, net	76,444
Other securities	716
Premises and equipment	1,738
Accrued interest receivable	194
Core deposit intangible	1,009
Other assets	472
Noninterest-bearing deposits	(18,263)
Interest-bearing deposits	(68,606)
Other liabilities	(5)
Net assets acquired	11,851
Goodwill	$ 5,375

Securities - Available for Sale

Securities - Available for Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 227,031	$ 192,820
Gross Unrealized Gains	5,085	4,292
Gross Unrealized Losses	(1,054)	(1,248)
Fair Value	231,062	195,864
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	30,450	37,406
Gross Unrealized Gains	100	117
Gross Unrealized Losses	(192)	(77)
Fair Value	30,357	37,446
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	114,002	92,177
Gross Unrealized Gains	4,226	3,395
Gross Unrealized Losses	(172)	(574)
Fair Value	118,056	94,998
Mortgage-back Securities in Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	82,098	62,756
Gross Unrealized Gains	408	483
Gross Unrealized Losses	(690)	(597)
Fair Value	81,817	62,642
Total Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	226,550	192,339
Gross Unrealized Gains	4,734	3,995
Gross Unrealized Losses	(1,054)	(1,248)
Fair Value	230,230	195,086
Equity Securities in Financial Institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	481	481
Gross Unrealized Gains	351	297
Fair Value	$ 832	$ 778

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investments Debt And Equity Securities [Abstract]
Amortized Cost, Due in one year or less	$ 8,787
Amortized Cost, Due from one to five years	27,662
Amortized Cost, Due from five to ten years	30,167
Amortized Cost, Due after ten years	77,836
Amortized Cost, Mortgage-backed securities in government sponsored entities	82,098
Amortized Cost, Equity securities in financial institutions	481
Amortized Cost	227,031	$ 192,820
Fair Value, Due in one year or less	8,765
Fair Value, Due from one to five years	27,691
Fair Value, Due from five to ten years	31,622
Fair Value, Due after ten years	80,335
Fair Value, Mortgage-backed securities in government sponsored entities	81,817
Fair Value, Equity securities in financial institutions	832
Fair Value, Total	$ 231,062	$ 195,864

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	Dec. 31, 2017USD ($)Security	Dec. 31, 2016USD ($)
Investments Debt And Equity Securities [Abstract]
Carrying value of pledged securities | $	$ 122,862	$ 139,179
Number of securities in portfolio with unrealized losses | Security	78

Securities - Proceeds from Sale

Securities - Proceeds from Sales of Securities, Gross Realized Gains and Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investments Debt And Equity Securities [Abstract]
Sale proceeds	$ 953	$ 4,349	$ 0
Gross realized gains	0	18	0
Gross realized losses	0	0	0
Gains (losses) from securities called or settled by the issuer	$ 12	$ 1	$ (18)

Securities - Securities with Un

Securities - Securities with Unrealized Losses Not Recognized in Income (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
12 Months or less, Fair Value	$ 54,040	$ 65,891
12 Months or less, Unrealized Loss	(336)	(1,185)
More than 12 months, Fair Value	36,125	4,261
More than 12 months, Unrealized Loss	(718)	(63)
Total Fair Value	90,165	70,152
Total Unrealized Loss	(1,054)	(1,248)
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
12 Months or less, Fair Value	20,449	13,271
12 Months or less, Unrealized Loss	(100)	(61)
More than 12 months, Fair Value	6,617	893
More than 12 months, Unrealized Loss	(92)	(16)
Total Fair Value	27,066	14,164
Total Unrealized Loss	(192)	(77)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
12 Months or less, Fair Value	4,057	17,167
12 Months or less, Unrealized Loss	(41)	(558)
More than 12 months, Fair Value	7,309	519
More than 12 months, Unrealized Loss	(131)	(16)
Total Fair Value	11,366	17,686
Total Unrealized Loss	(172)	(574)
Mortgage-backed Securities in Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
12 Months or less, Fair Value	29,534	35,453
12 Months or less, Unrealized Loss	(195)	(566)
More than 12 months, Fair Value	22,199	2,849
More than 12 months, Unrealized Loss	(495)	(31)
Total Fair Value	51,733	38,302
Total Unrealized Loss	$ (690)	$ (597)

Loans - Loan Balances (Detail)

Loans - Loan Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total Loans	$ 1,164,661	$ 1,055,506
Allowance for loan losses	(13,134)	(13,305)
Net loans	1,151,527	1,042,201
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	152,473	135,462
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	164,099	161,364
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	425,623	395,931
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	268,735	247,308
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	97,531	56,293
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	39,461	41,170
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	$ 16,739	$ 17,978

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Deferred loan fees and costs	$ 223	$ 94

Loans - Loans to Directors and

Loans - Loans to Directors and Executive Officers Including Immediate Families (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Receivables Other Related Parties And Retainage [Abstract]
Balance - Beginning of year	$ 14,389	$ 15,147
New loans and advances	2,344	850
Repayments	(1,256)	(1,575)
Effect of changes to related parties	(1,475)	(33)
Balance - End of year	$ 14,002	$ 14,389

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoan	Dec. 31, 2016USD ($)SecurityLoan	Dec. 31, 2015USD ($)SecurityLoan
Accounts Notes And Loans Receivable [Line Items]
Period for calculating Loss migration rates of portfolio segments	3 years		3 years
Allowance for loan losses	$ 13,134	$ 13,305
Proceeds from payoff on previously charged-off loans		1,303
Number of days past due for loans to be considered as nonperforming	90 days
Reasonable period for nonperforming TDRs to be returned to performing status	6 months
Number of days reaching where loans are considered for nonaccrual status	90 days
Conditions where loans are considered for nonaccrual status	A loan may be returned to accruing status only if one of three conditions are met: the loan is well-secured and none of the principal and interest has been past due for a minimum of 90 days; the loan is a TDR and the borrower has made a minimum of six months payments; or the principal and interest payments are reasonably assured and a sustained period of performance has occurred, generally six months.
Gross interest income recorded on nonaccrual loans	$ 712	701	$ 1,761
Interest income on nonaccrual loans recognized on cash basis	$ 139	$ 1,138	$ 766
Defaulted loans | SecurityLoan	0	0	1
Total loans modified and considered TDRs			$ 107
Impaired loans	greater than $350
Foreclosed assets	$ 16	$ 37
Allowance for loan losses recorded for acquired loans	126	175
Residential Mortgage [Member]
Accounts Notes And Loans Receivable [Line Items]
Foreclosed assets	16
Residential mortgages in process of foreclosure	239	710
TDRs [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses	$ 169	$ 278	286
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Decreases allowance for loans			$ (625)
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses look back period			3 years
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses look back period			3 years
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses look back period			3 years

Allowance for Loan Losses - Cha

Allowance for Loan Losses - Changes in the Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	$ 13,305	$ 14,361	$ 14,268
Charge-offs	(942)	(1,826)	(2,049)
Recoveries	771	2,070	942
Provision (Credit)		(1,300)	1,200
Ending Balance	13,134	13,305	14,361
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	2,018	1,478	1,819
Charge-offs	(11)	(880)	(190)
Recoveries	372	105	182
Provision (Credit)	(817)	1,315	(333)
Ending Balance	1,562	2,018	1,478
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	2,171	2,467	2,221
Charge-offs	(328)	(228)	(523)
Recoveries	69	56	187
Provision (Credit)	131	(124)	582
Ending Balance	2,043	2,171	2,467
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	4,606	4,657	4,334
Charge-offs	(38)	(23)	(81)
Recoveries	46	1,372	115
Provision (Credit)	693	(1,400)	289
Ending Balance	5,307	4,606	4,657
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	3,089	4,086	3,747
Charge-offs	(400)	(455)	(1,135)
Recoveries	194	479	331
Provision (Credit)	(973)	(1,021)	1,143
Ending Balance	1,910	3,089	4,086
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	420	371	428
Charge-offs		(115)
Recoveries	44	12	5
Provision (Credit)	370	152	(62)
Ending Balance	834	420	371
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	442	538	822
Recoveries	3		76
Provision (Credit)	(15)	(96)	(360)
Ending Balance	430	442	538
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	314	382	200
Charge-offs	(165)	(125)	(120)
Recoveries	43	46	46
Provision (Credit)	98	11	256
Ending Balance	290	314	382
Unallocated [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	245	382	697
Provision (Credit)	513	(137)	(315)
Ending Balance	$ 758	$ 245	$ 382

Allowance for Loan Losses - End

Allowance for Loan Losses - Ending Allocation of Allowance for Loan Losses and Loan Balances Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Individually evaluated for impairment	$ 125	$ 188
Allowance for loan losses, Collectively evaluated for impairment	12,883	12,942
Allowance for loan losses, Total	13,134	13,305	$ 14,361	$ 14,268
Outstanding loan balances, Individually evaluated for impairment	3,460	6,539
Outstanding loan balances, Collectively evaluated for impairment	1,160,986	1,048,711
Outstanding loan balances, Total	1,164,661	1,055,506
Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans acquired with credit deterioration	126	175
Loan balance of loans acquired with credit deterioration	215	256
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Individually evaluated for impairment	4	82
Allowance for loan losses, Collectively evaluated for impairment	1,476	1,850
Allowance for loan losses, Total	1,562	2,018	1,478	1,819
Outstanding loan balances, Individually evaluated for impairment	438	1,983
Outstanding loan balances, Collectively evaluated for impairment	151,948	133,391
Outstanding loan balances, Total	152,473	135,462
Commercial and Agriculture [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans acquired with credit deterioration	82	86
Loan balance of loans acquired with credit deterioration	87	88
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Individually evaluated for impairment	6	4
Allowance for loan losses, Collectively evaluated for impairment	2,037	2,167
Allowance for loan losses, Total	2,043	2,171	2,467	2,221
Outstanding loan balances, Individually evaluated for impairment	1,010	1,896
Outstanding loan balances, Collectively evaluated for impairment	163,089	159,468
Outstanding loan balances, Total	164,099	161,364
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	5,307	4,606
Allowance for loan losses, Total	5,307	4,606	4,657	4,334
Outstanding loan balances, Individually evaluated for impairment	44	359
Outstanding loan balances, Collectively evaluated for impairment	425,579	395,572
Outstanding loan balances, Total	425,623	395,931
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Individually evaluated for impairment	109	102
Allowance for loan losses, Collectively evaluated for impairment	1,757	2,898
Allowance for loan losses, Total	1,910	3,089	4,086	3,747
Outstanding loan balances, Individually evaluated for impairment	1,360	1,686
Outstanding loan balances, Collectively evaluated for impairment	267,247	245,454
Outstanding loan balances, Total	268,735	247,308
Residential Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans acquired with credit deterioration	44	89
Loan balance of loans acquired with credit deterioration	128	168
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	834	420
Allowance for loan losses, Total	834	420	371	428
Outstanding loan balances, Collectively evaluated for impairment	97,531	56,293
Outstanding loan balances, Total	97,531	56,293
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Individually evaluated for impairment	6
Allowance for loan losses, Collectively evaluated for impairment	424	442
Allowance for loan losses, Total	430	442	538	822
Outstanding loan balances, Individually evaluated for impairment	608	614
Outstanding loan balances, Collectively evaluated for impairment	38,853	40,556
Outstanding loan balances, Total	39,461	41,170
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	290	314
Allowance for loan losses, Total	290	314	382	200
Outstanding loan balances, Individually evaluated for impairment		1
Outstanding loan balances, Collectively evaluated for impairment	16,739	17,977
Outstanding loan balances, Total	16,739	17,978
Unallocated [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	758	245
Allowance for loan losses, Total	$ 758	$ 245	$ 382	$ 697

Allowance for Loan Losses - Cre

Allowance for Loan Losses - Credit Exposures by Internally Assigned Grades (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	$ 945,123	$ 854,479
Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	152,473	135,462
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	164,099	161,364
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	425,623	395,931
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	70,498	67,587
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	91,587	50,721
Farm Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	39,461	41,170
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,382	2,244
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	899,674	816,760
Pass [Member] | Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	140,842	127,867
Pass [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	155,756	151,659
Pass [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	422,363	393,592
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	62,628	59,015
Pass [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	91,545	50,678
Pass [Member] | Farm Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	25,228	31,814
Pass [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,312	2,135
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	25,147	17,342
Special Mention [Member] | Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	8,412	4,300
Special Mention [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,166	4,016
Special Mention [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	2,321	1,676
Special Mention [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,997	1,661
Special Mention [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	15	16
Special Mention [Member] | Farm Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	11,236	5,673
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	20,302	20,377
Substandard [Member] | Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	3,219	3,295
Substandard [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	7,177	5,689
Substandard [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	939	663
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	5,873	6,911
Substandard [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	27	27
Substandard [Member] | Farm Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	2,997	3,683
Substandard [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	$ 70	$ 109

Allowance for Loan Losses - Per

Allowance for Loan Losses - Performing and Nonperforming Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Performing	$ 219,522	$ 201,018
Nonperforming	16	9
Total	219,538	201,027
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing	198,237	179,721
Total	198,237	179,721
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing	5,944	5,572
Total	5,944	5,572
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing	15,341	15,725
Nonperforming	16	9
Total	$ 15,357	$ 15,734

Allowance for Loan Losses - Agi

Allowance for Loan Losses - Aging Analysis of Past Due Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 6,421	$ 6,111
Current	1,158,025	1,049,139
Total Loans	1,164,661	1,055,506
Past Due 90 Days and Accruing	16	9
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,337	3,145
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	431	1,111
90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,653	1,855
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Purchased Credit-Impaired Loans	215	256
Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,262	328
Current	151,124	135,046
Total Loans	152,473	135,462
Commercial and Agriculture [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	575	156
Commercial and Agriculture [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2	20
Commercial and Agriculture [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	685	152
Commercial and Agriculture [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Purchased Credit-Impaired Loans	87	88
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,485	1,555
Current	162,614	159,809
Total Loans	164,099	161,364
Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	897	722
Commercial Real Estate Owner Occupied [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	104	553
Commercial Real Estate Owner Occupied [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	484	280
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	603	463
Current	425,020	395,468
Total Loans	425,623	395,931
Commercial Real Estate Non Owner Occupied [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	133	147
Commercial Real Estate Non Owner Occupied [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	470	316
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,627	3,368
Current	265,980	243,772
Total Loans	268,735	247,308
Residential Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,613	1,812
Residential Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	229	507
Residential Real Estate [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	785	1,049
Residential Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Purchased Credit-Impaired Loans	128	168
Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	27
Current	97,504	56,266
Total Loans	97,531	56,293
Real Estate Construction [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	27
Farm Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	213	93
Current	39,248	41,077
Total Loans	39,461	41,170
Farm Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	93
Farm Real Estate [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	186
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	204	277
Current	16,535	17,701
Total Loans	16,739	17,978
Past Due 90 Days and Accruing	16	9
Consumer and Other [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	92	215
Consumer and Other [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	96	31
Consumer and Other [Member] | 90 Days or Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 16	$ 31

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	$ 6,132	$ 6,943
Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	887	1,622
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	1,476	1,461
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	711	464
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	2,778	3,266
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	27	27
Farm Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	186	2
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total, Non-Accrual Status	$ 67	$ 101

Allowance for Loan Losses - Sch

Allowance for Loan Losses - Schedule of Troubled Debt Restructurings (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract	Dec. 31, 2015USD ($)Contract
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of Contracts | Contract	1	9	1
Pre- Modification Outstanding Recorded Investment	$ 13	$ 1,537	$ 41
Post-Modification Outstanding Recorded Investment	$ 13	$ 1,537	$ 41
Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of Contracts | Contract		4
Pre- Modification Outstanding Recorded Investment		$ 529
Post-Modification Outstanding Recorded Investment		$ 529
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of Contracts | Contract	1	2
Pre- Modification Outstanding Recorded Investment	$ 13	$ 308
Post-Modification Outstanding Recorded Investment	$ 13	$ 308
Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of Contracts | Contract			1
Pre- Modification Outstanding Recorded Investment			$ 41
Post-Modification Outstanding Recorded Investment			$ 41
Farm Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of Contracts | Contract		3
Pre- Modification Outstanding Recorded Investment		$ 700
Post-Modification Outstanding Recorded Investment		$ 700

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Financing Receivables Excluding PCI Loans - Recorded Investment and Unpaid Principal Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment	$ 1,862	$ 5,121
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance	2,158	6,145
Impaired financing receivables, with an allowance recorded, Recorded Investment	1,598	1,418
Impaired financing receivables, with an allowance recorded, Unpaid Principal Balance	1,602	1,972
Impaired financing receivables, with an allowance recorded, Related Allowance	125	188
Impaired financing receivables, Recorded Investment, Total	3,460	6,539
Impaired financing receivables, Unpaid Principal Balance, Total	3,760	8,117
Impaired financing receivables, Related Allowance, Total	125	188
Commercial and Agriculture [Member]
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment		1,230
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance		1,751
Impaired financing receivables, with an allowance recorded, Recorded Investment	438	753
Impaired financing receivables, with an allowance recorded, Unpaid Principal Balance	438	1,303
Impaired financing receivables, with an allowance recorded, Related Allowance	4	82
Impaired financing receivables, Recorded Investment, Total	438	1,983
Impaired financing receivables, Unpaid Principal Balance, Total	438	3,054
Impaired financing receivables, Related Allowance, Total	4	82
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment	693	1,658
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance	913	1,803
Impaired financing receivables, with an allowance recorded, Recorded Investment	317	238
Impaired financing receivables, with an allowance recorded, Unpaid Principal Balance	317	238
Impaired financing receivables, with an allowance recorded, Related Allowance	6	4
Impaired financing receivables, Recorded Investment, Total	1,010	1,896
Impaired financing receivables, Unpaid Principal Balance, Total	1,230	2,041
Impaired financing receivables, Related Allowance, Total	6	4
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment	44	359
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance	48	386
Impaired financing receivables, Recorded Investment, Total	44	359
Impaired financing receivables, Unpaid Principal Balance, Total	48	386
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment	977	1,259
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance	1,049	1,590
Impaired financing receivables, with an allowance recorded, Recorded Investment	383	427
Impaired financing receivables, with an allowance recorded, Unpaid Principal Balance	387	431
Impaired financing receivables, with an allowance recorded, Related Allowance	109	102
Impaired financing receivables, Recorded Investment, Total	1,360	1,686
Impaired financing receivables, Unpaid Principal Balance, Total	1,436	2,021
Impaired financing receivables, Related Allowance, Total	109	102
Farm Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment	148	614
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance	148	614
Impaired financing receivables, with an allowance recorded, Recorded Investment	460
Impaired financing receivables, with an allowance recorded, Unpaid Principal Balance	460
Impaired financing receivables, with an allowance recorded, Related Allowance	6
Impaired financing receivables, Recorded Investment, Total	608	614
Impaired financing receivables, Unpaid Principal Balance, Total	608	614
Impaired financing receivables, Related Allowance, Total	$ 6
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired financing receivables, with no related allowance recorded, Recorded Investment		1
Impaired financing receivables, with no related allowance recorded, Unpaid Principal Balance		1
Impaired financing receivables, Recorded Investment, Total		1
Impaired financing receivables, Unpaid Principal Balance, Total		$ 1

Allowance for Loan Losses - I78

Allowance for Loan Losses - Impaired Loans - Average Recorded Investment and Interest Income Recognized (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 5,243	$ 7,717	$ 9,420
Interest Income Recognized	216	1,256	384
Commercial and Agriculture [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,375	2,036	1,519
Interest Income Recognized	34	40	54
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,507	1,847	2,738
Interest Income Recognized	75	862	139
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	233	1,039	1,946
Interest Income Recognized	6	83	32
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,515	1,787	2,544
Interest Income Recognized	73	175	103
Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			16
Interest Income Recognized		1
Farm Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	613	1,006	653
Interest Income Recognized	$ 28	95	56
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 2	$ 4

Allowance for Loan Losses - S79

Allowance for Loan Losses - Schedule of Changes in Amortized Yield for PCI Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Movement Schedule Roll Forward
Balance at beginning of period	$ 49	$ 80
Acquisition of PCI loans	0	0
Accretion	(34)	(31)
Balance at end of period	$ 15	$ 49

Allowance for Loan Losses - S80

Allowance for Loan Losses - Schedule of Loans Acquired and Accounted (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Outstanding balance	$ 775	$ 850
Carrying amount	$ 215	$ 256

Other Comprehensive Income (L81

Other Comprehensive Income (Loss) - Changes in Each Component of Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 137,616	$ 125,173	$ 115,909
Amounts reclassified from accumulated other comprehensive loss	239	202	189
Total other comprehensive income (loss)	1,412	(1,842)	(448)
Reclassification of certain income tax effects from accumulated other comprehensive loss	199
Ending balance	184,461	137,616	125,173
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	2,008	3,554	3,730
Other comprehensive income (loss) before reclassifications	620	(1,533)	(188)
Amounts reclassified from accumulated other comprehensive loss	(8)	(13)	12
Total other comprehensive income (loss)	612	(1,546)	(176)
Reclassification of certain income tax effects from accumulated other comprehensive loss	565
Ending balance	3,185	2,008	3,554
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(4,345)	(4,049)	(3,777)
Other comprehensive income (loss) before reclassifications	553	(511)	(449)
Amounts reclassified from accumulated other comprehensive loss	247	215	177
Total other comprehensive income (loss)	800	(296)	(272)
Reclassification of certain income tax effects from accumulated other comprehensive loss	(764)
Ending balance	(4,309)	(4,345)	(4,049)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,337)	(495)	(47)
Other comprehensive income (loss) before reclassifications	1,173	(2,044)	(637)
Amounts reclassified from accumulated other comprehensive loss	239	202	189
Total other comprehensive income (loss)	1,412	(1,842)	(448)
Reclassification of certain income tax effects from accumulated other comprehensive loss	(199)
Ending balance	$ (1,124)	$ (2,337)	$ (495)

Other Comprehensive Income (L82

Other Comprehensive Income (Loss) - Amounts Reclassified Out of Each Component of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain (loss) on sale of securities	$ (12)	$ (19)	$ 18
Income taxes	6,360	6,619	4,781
Net of tax	(14,628)	(15,716)	(11,168)
Reclassifications, net of tax	(239)	(202)	(189)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax	8	13	(12)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain (loss) on sale of securities	12	19	(18)
Income taxes	(4)	(6)	6
Net of tax	(8)	(13)	12
Accumulated Defined Benefit Plans Adjustment, Actuarial Losses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Salaries, wages and benefits	(380)	(326)	(270)
Defined Benefit Pension Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income taxes	133	111	93
Reclassifications, net of tax	$ (247)	$ (215)	$ (177)

Premises and Equipment - Year-E

Premises and Equipment - Year-End Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 43,247	$ 41,430
Accumulated depreciation	(25,636)	(23,510)
Premises and equipment, net	17,611	17,920
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	5,022	5,094
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	21,221	20,266
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 17,004	$ 16,070

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	$ 1,249	$ 1,257	$ 1,193
Rent expense	$ 580	$ 540	$ 506

Premises and Equipment - Rent C

Premises and Equipment - Rent Commitments Under Non-cancelable Operating Leases (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Leases [Abstract]
2,018	$ 571
2,019	479
2,020	226
2,021	91
2,022	36
Total	$ 1,403

Goodwill and Intangible Asset86

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 27,095,000	$ 27,095,000
Change in carrying amount of goodwill	0	0
Amortization of core deposit intangible assets	586,000	699,000	$ 711,000
Aggregate mortgage servicing rights amortization	$ 72,000	$ 74,000	$ 29,000

Goodwill and Intangible Asset87

Goodwill and Intangible Assets - Schedule of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,339	$ 8,186
Accumulated Amortization	7,060	6,402
Net Carrying Amount	1,279	1,784
MSRs [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,065	912
Accumulated Amortization	322	250
Net Carrying Amount	743	662
Core deposit intangibles [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,274	7,274
Accumulated Amortization	6,738	6,152
Net Carrying Amount	$ 536	$ 1,122

Goodwill and Intangible Asset88

Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite Lived Intangible Assets [Line Items]
2,018	$ 152
2,019	129
2,020	112
2,021	109
2,022	109
Thereafter	668
Net Carrying Amount	1,279	$ 1,784
MSRs [Member]
Acquired Finite Lived Intangible Assets [Line Items]
2,018	41
2,019	41
2,020	41
2,021	41
2,022	41
Thereafter	538
Net Carrying Amount	743	662
Core deposit intangibles [Member]
Acquired Finite Lived Intangible Assets [Line Items]
2,018	111
2,019	88
2,020	71
2,021	68
2,022	68
Thereafter	130
Net Carrying Amount	$ 536	$ 1,122

Interest-Bearing Deposits - Sum

Interest-Bearing Deposits - Summary of Interest-Bearing Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Banking And Thrift [Abstract]
Demand	$ 183,680	$ 183,759
Statement and Passbook Savings	435,377	384,330
$250 and over	8,206	13,640
Certificates of Deposit: Other	192,455	168,723
Individual Retirement Accounts	23,241	25,063
Total	$ 842,959	$ 775,515

Interest-Bearing Deposits - Sch

Interest-Bearing Deposits - Scheduled Maturities of Certificates of Deposit (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Banking And Thrift [Abstract]
2,018	$ 161,656
2,019	41,926
2,020	15,459
2,021	3,382
2,022	1,202
Thereafter	277
Total	$ 223,902

Interest-Bearing Deposits - Add

Interest-Bearing Deposits - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deposits [Line Items]
Total deposits	$ 1,204,923	$ 1,121,103
Total of CDs and IRAs	9,141
Principal officers, directors, and their affiliates [Member]
Deposits [Line Items]
Total deposits	$ 9,633	$ 9,209

Short-Term Borrowings - Summary

Short-Term Borrowings - Summary of Federal Funds Purchased and Other Short-term Borrowings (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Maximum indebtedness during the year	$ 20,000,000	$ 20,000,000
Average balance during the year	$ 119,000	$ 116,000	$ 69,000
Average rate paid during the year	1.68%	0.86%	0.53%
Short Term Borrowings [Member]
Short-term Debt [Line Items]
Outstanding balance at year end	$ 56,900,000	$ 31,000,000	$ 53,700,000
Maximum indebtedness during the year	115,050,000	70,400,000	64,700,000
Average balance during the year	$ 38,825,000	$ 10,483,000	$ 26,880,000
Average rate paid during the year	1.12%	0.42%	0.20%
Interest rate on year end balance	1.42%	0.64%	0.35%

Federal Home Loan Bank Advanc93

Federal Home Loan Bank Advances - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advances from FHLB	$ 15,000	$ 17,500
Maturities, year from	2,018
Maturities, year to	2,019
Outstanding letters of credit with FHLB	$ 19,600	19,600
FHLB borrowings collateralized by residential mortgage loans	137,250	$ 102,150
FHLB maximum borrowing capacity	366,122
FHLB remaining borrowing capacity	$ 274,622
Minimum [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Maturities from February 2018 through October 2019, fixed rates	1.50%
Maximum [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Maturities from February 2018 through October 2019, fixed rates	2.10%
Weighted Average [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Maturities from February 2018 through October 2019, fixed rates	1.70%

Federal Home Loan Bank Advanc94

Federal Home Loan Bank Advances - Scheduled Principal Reductions of Federal Home Loan Bank Advances Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Banking And Thrift [Abstract]
2,018	$ 10,000
2,019	5,000
Total	$ 15,000	$ 17,500

Securities Sold Under Agreeme95

Securities Sold Under Agreements To Repurchase - Summary of Securities Pledged as Collateral Under Repurchase Agreements (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Offsetting Liabilities [Line Items]
Total securities pledged	$ 21,755	$ 28,925	$ 25,040
Gross amount of recognized liabilities for repurchase agreements	21,755	28,925
Amounts related to agreements not included in offsetting disclosures above	0	0
U.S.Treasury Securities [Member]
Offsetting Liabilities [Line Items]
Total securities pledged	874	1,761
Obligations of U.S. Government Agencies [Member]
Offsetting Liabilities [Line Items]
Total securities pledged	$ 20,881	$ 27,164

Securities Sold Under Agreeme96

Securities Sold Under Agreements to Repurchase - Schedule of Securities Sold Under Agreements to Repurchase (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Outstanding balance at year end	$ 21,755	$ 28,925	$ 25,040
Average balance during the year	$ 18,234	$ 21,767	$ 20,086
Average interest rate during the year	0.10%	0.10%	0.10%
Maximum month-end balance during the year	$ 23,889	$ 28,925	$ 25,040
Weighted average interest rate at year end	0.10%	0.10%	0.10%

Subordinated Debentures - Addit

Subordinated Debentures - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Apr. 30, 2007USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2007Trust_Preferred_Securities
Subordinated Borrowing [Line Items]
Redeem and refinance of floating rate subordinated debenture	$ 5,000,000
Refinancing at face value, reduction rate		2.00%
Subordinated debenture, maturity period		30 years
Subordinated debentures, principal amount percentage		100.00%
Minimum [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures may redeem part of principal amount		$ 1,000,000
Futura Ban Corp [Member]
Subordinated Borrowing [Line Items]
Number of additional trust preferred securities acquired | Trust_Preferred_Securities			2
3.58% Debenture [Member]
Subordinated Borrowing [Line Items]
Debt, face amount		$ 12,500,000
Debt, interest rate		3.58%
Redemption of subordinated debentures description		The Company may redeem the subordinated debentures, in whole or in part, in a principal amount with integral multiples of $1,000, at 100% of the principal amount, plus accrued and unpaid interest.
Subordinated Debentures [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, maturity date		Jun. 15, 2035
4.48% Debenture [Member]
Subordinated Borrowing [Line Items]
Debt, face amount		$ 7,500,000
Debt, interest rate		4.48%
2.92% Debenture [Member]
Subordinated Borrowing [Line Items]
Debt, face amount		$ 5,000,000
Debt, interest rate		2.92%
6.05% Fixed Rate Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Debt, face amount		$ 12,500,000
Debt, interest rate		6.05%
Subordinated debenture, maturity term		5 years
2.98% Debenture [Member] | Futura TPF Trust I [Member]
Subordinated Borrowing [Line Items]
Debt, face amount		$ 2,500,000
Debt instrument, variable interest rate percentage		2.98%
2.98% Debenture [Member] | Futura TPF Trust II [Member]
Subordinated Borrowing [Line Items]
Debt, face amount		$ 1,927,000
Debt instrument, variable interest rate percentage		2.98%
Subordinated Debenture [Member]
Subordinated Borrowing [Line Items]
Issuance of Trust Preferred Securities in exchange for Subordinated Debentures		$ 5,000,000
Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Issuance of Trust Preferred Securities in exchange for Subordinated Debentures		7,500,000
Trust Preferred Securities [Member] | Futura TPF Trust I [Member]
Subordinated Borrowing [Line Items]
Acquired trust preferred securities		2,500,000
Trust Preferred Securities [Member] | Futura TPF Trust II [Member]
Subordinated Borrowing [Line Items]
Acquired trust preferred securities		$ 1,927,000

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Expense Benefit Continuing Operations [Abstract]
Current	$ 5,414	$ 6,449	$ 5,191
Deferred	435	170	(410)
Change in corporate tax rate	511
Income tax expense	$ 6,360	$ 6,619	$ 4,781

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes Disclosure [Line Items]
Statutory federal income tax rate		35.00%	35.00%	34.00%
Increase in income tax expense		$ 511,000
Valuation allowance		0	$ 0
Liability for uncertain tax positions, current		0
Unrecognized tax benefits		$ 0
Scenario Forecast [Member]
Income Taxes Disclosure [Line Items]
Statutory federal income tax rate	21.00%

Income Taxes - Effective Tax Ra

Income Taxes - Effective Tax Rates Differ from Statutory Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income taxes computed at the statutory federal tax rate	$ 7,781	$ 8,343	$ 5,959
Add (subtract) tax effect of:
Nontaxable interest income, net of nondeductible interest expense	(1,107)	(946)	(900)
Low income housing tax credit	(686)	(435)	(303)
Cash surrender value of BOLI	(201)	(197)	(159)
Change in corporate tax rate	511
Other	62	(146)	184
Income tax expense	$ 6,360	$ 6,619	$ 4,781

Income Taxes - Summary of Defer

Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets
Allowance for loan losses	$ 2,848	$ 4,640
Deferred compensation	1,213	1,762
Intangible assets	95	187
Pension costs		277
Other	141	102
Deferred tax asset	4,297	6,968
Deferred tax liabilities
Tax depreciation in excess of book depreciation	(275)	(97)
Discount accretion on securities	(43)	(58)
Purchase accounting adjustments	(536)	(1,091)
FHLB stock dividends	(1,053)	(1,705)
Unrealized gain on securities available for sale	(847)	(1,035)
Pension costs	(293)
Prepaids	(320)
Other	(166)	(256)
Deferred tax liability	(3,533)	(4,242)
Net deferred tax asset	$ 764	$ 2,726

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Employee	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Defined Benefit Plan Disclosure [Line Items]
Matching contribution to 401(k) plan	$ 805,000	$ 734,000	$ 667,000
Employer matching contribution description	The Company’s matching contribution is 100% of an employee’s first three percent contributed and 50% of the next two percent contributed.
Pension plan eligibility age of employees	20 years 6 months
Pension plan eligibility service period of employees	6 months
Pension plan eligibility service hours of employees	1000 hours
Additional benefits under pension plan	$ 0
Interest expense	4,092,000	3,308,000	3,309,000
Unrecognized actuarial loss	4,070,000	4,345,000
Unrecognized actuarial net of tax	2,191,000	2,238,000
Accumulated benefit obligation for defined benefit pension plan	17,916,000	16,964,000
Net periodic benefit cost over the next fiscal year	380,000
Incurred settlement cost	$ 237,000	$ 259,000	$ 415,000
Rate of compensation increase used to determine the benefit obligation	0.00%	0.00%	0.00%
Long-term rate of return on plan assets	7.00%	7.00%
Expected future employer contributions	$ 0
Employer contribution	2,000,000	$ 500,000
Fund status	1,390,000	(814,000)
Shortfall Agreements [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension shortfall expense	18,000	201,000	$ 364,000
Interest expense	$ 18,000	11,000	10,000
Number of individuals under plan | Employee	10
Supplemental Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum retirement year for participants	10 years
Liability recorded for supplemental retirement plan	$ 2,308,000	1,984,000
Expenses recorded for supplemental retirement plan	365,000	243,000	299,000
Total distribution to participant	$ 41,000	$ 34,000	$ 22,000

Retirement Plans - Information

Retirement Plans - Information about Pension Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in benefit obligation:
Beginning benefit obligation	$ 16,964	$ 16,328
Service cost	0	0	$ 0
Interest cost	679	689	604
Curtailment gain	0	0
Settlement loss	46	51
Actuarial (gain)/loss	986	669
Benefits paid	(759)	(773)
Ending benefit obligation	17,916	16,964	16,328
Change in plan assets, at fair value:
Beginning plan assets	16,150	15,647
Actual return	1,947	802
Employer contribution	2,000	500
Benefits paid	(759)	(773)
Administrative expenses	(32)	(26)
Ending plan assets	19,306	16,150	$ 15,647
Funded status at end of year	$ 1,390	$ (814)

Retirement Plans - Components o

Retirement Plans - Components of Net Periodic Pension Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 0	$ 0	$ 0
Interest cost	679	689	604
Expected return on plan assets	1,178	1,090	1,088
Net amortization and deferral	(380)	(326)	(270)
Net periodic pension cost (benefit)	(119)	(75)	(214)
Net loss (gain) recognized in other comprehensive loss	(322)	448	412
Total recognized in net periodic benefit cost and other comprehensive loss (before tax)	$ (441)	$ 373	$ 198

Retirement Plans - Weighted Ave

Retirement Plans - Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	0.00%	0.00%	0.00%
Long-term rate of return on plan assets	7.00%	7.00%
Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate on benefit obligation	3.51%	4.00%	4.16%
Long-term rate of return on plan assets	7.00%	7.00%	7.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Net Periodic Pension Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate on benefit obligation	4.00%	4.16%	3.69%
Long-term rate of return on plan assets	7.00%	7.00%	7.00%
Rate of compensation increase	0.00%	0.00%	0.00%

Retirement Plans - Schedule of

Retirement Plans - Schedule of Target Allocation and Expected Long-Term Rate of Return by Asset Category (Detail)	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%	100.00%
Equity Securities in Financial Institutions [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	48.00%	47.50%
Equity Securities in Financial Institutions [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Equity Securities in Financial Institutions [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	50.00%
Total Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	51.90%	52.10%
Total Debt Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	30.00%
Total Debt Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	60.00%
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	0.10%	0.40%
Money Market Funds [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Money Market Funds [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	30.00%

Retirement Plans - Plan's Asset

Retirement Plans - Plan's Assets at Fair Value Hierarchy (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 19,306	$ 16,150	$ 15,647
Bond Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	23
Common/Collective Trust, Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	6,654
Equity Market Funds, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	750
Equity Market Funds, Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	1,085
Equity Market Funds, Mid Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	269
Equity Market Funds, Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	432
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	113
Common/Collective Trust, Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	9,980
(Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	19,306
(Level 1) [Member] | Bond Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	23
(Level 1) [Member] | Common/Collective Trust, Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	6,654
(Level 1) [Member] | Equity Market Funds, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	750
(Level 1) [Member] | Equity Market Funds, Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	1,085
(Level 1) [Member] | Equity Market Funds, Mid Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	269
(Level 1) [Member] | Equity Market Funds, Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	432
(Level 1) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	113
(Level 1) [Member] | Common/Collective Trust, Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 9,980

Retirement Plans - Summary of E

Retirement Plans - Summary of Expected Benefit Payments (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Defined Benefit Plan Estimated Future Benefit Payments [Abstract]
2,018	$ 1,903
2,019	1,127
2,020	650
2,021	913
2,022	1,182
2023 through 2027	4,723
Total	$ 10,498

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 11, 2017	May 16, 2017	May 17, 2016	Jan. 04, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted common shares granted					43,906
Share based compensation - Civista BOD					$ 426	$ 323	$ 106
Share based compensation expense					274
Expected future compensation expense					$ 317
Civista [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation - Civista BOD	$ 8	$ 144	$ 130	$ 32
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares vesting service period				3 years
Restricted common shares granted	367	6,804	12,285	2,730	17,898	28,864
2014 Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares under stock option plan authorized for issuance								375,000
Number of shares available for grant under stock option plan					292,209
Options granted					0	0
Expected future compensation expense					$ 317
Weighted average remaining life of grants related to unvested awards not yet recognized					2 years 9 months 14 days
2014 Incentive Plan [Member] | Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense					$ 152

Equity Incentive Plan - Summary

Equity Incentive Plan - Summary of Company's Restricted Stock (Detail) - USD ($) $ / shares in Units, $ in Thousands	Sep. 11, 2017	May 16, 2017	May 17, 2016	Jan. 04, 2016	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted					43,906
Expected future remaining compensation expense					$ 317
Expected future compensation expense, restricted shares remaining vesting period					2 years 9 months 14 days
Restricted Shares Awarded on January 15, 2016 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted					10,260
Date of Award					Jan. 15, 2016
Expected future remaining compensation expense					$ 66
Expected future compensation expense, restricted shares remaining vesting period					3 years
Restricted Shares Awarded on March 11, 2016 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted					15,748
Date of Award					Mar. 11, 2016
Expected future remaining compensation expense					$ 33
Expected future compensation expense, restricted shares remaining vesting period					1 year
Restricted Shares Awarded on March 20, 2017 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted					11,713
Date of Award					Mar. 20, 2017
Expected future remaining compensation expense					$ 110
Expected future compensation expense, restricted shares remaining vesting period					2 years
Restricted Shares Awarded on March 20, 2017 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted					6,185
Date of Award					Mar. 20, 2017
Expected future remaining compensation expense					$ 108
Expected future compensation expense, restricted shares remaining vesting period					4 years
Restricted Stock [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Nonvested at beginning of period					37,050	16,983
Number of Restricted Shares, Granted	367	6,804	12,285	2,730	17,898	28,864
Number of Restricted Shares, Vested					(12,810)	(5,657)
Number of Restricted Shares, Forfeited					0	(3,140)
Number of Restricted Shares, Nonvested at end of period					42,138	37,050
Weighted Average Grant Date Fair Value, Nonvested at beginning of period					$ 10.77	$ 10.82
Weighted Average Grant Date Fair Value, Granted					22.15	10.75
Weighted Average Grant Date Fair Value, Vested					10.76	10.82
Weighted Average Grant Date Fair Value, Forfeited					0	10.87
Weighted Average Grant Date Fair Value, Nonvested at end of period					$ 15.60	$ 10.77

Fair Value Measurement - Assets

Fair Value Measurement - Assets Measured at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 1,040	$ 952
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	16	37
(Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value swap asset	1,560	1,839
(Level 2) [Member] | Assets Measured at Fair Value on a Recurring Basis [Member] | Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value swap asset	1,560	1,839
Fair value swap liability	1,560	1,839
(Level 2) [Member] | Assets Measured at Fair Value on a Recurring Basis [Member] | U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	30,357	37,446
(Level 2) [Member] | Assets Measured at Fair Value on a Recurring Basis [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	118,056	94,998
(Level 2) [Member] | Assets Measured at Fair Value on a Recurring Basis [Member] | Mortgage-backed Securities in Government Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	81,817	62,642
(Level 2) [Member] | Assets Measured at Fair Value on a Recurring Basis [Member] | Equity Securities in Financial Institutions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	832	778
(Level 3) [Member] | Assets Measured at Fair Value on a Nonrecurring Basis [Member] | Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	1,040	952
(Level 3) [Member] | Assets Measured at Fair Value on a Nonrecurring Basis [Member] | Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 16	$ 37

Fair Value Measurement - Quanti

Fair Value Measurement - Quantitative Information about Level 3 Fair Value Measurements (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Estimate	$ 1,040	$ 952
Fair Value Measurements, Valuation Technique	Appraisal of collateral	Appraisal of collateral
Impaired Loans [Member] | Minimum [Member] | Appraisal of Collateral [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Appraisal adjustments	0.00%	10.00%
Fair Value Assumptions, Liquidation expense	0.00%	0.00%
Fair Value Assumptions, Holding period	0 months	0 months
Impaired Loans [Member] | Maximum [Member] | Appraisal of Collateral [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Appraisal adjustments	30.00%	67.00%
Fair Value Assumptions, Liquidation expense	10.00%	10.00%
Fair Value Assumptions, Holding period	30 months	30 months
Impaired Loans [Member] | Weighted Average [Member] | Appraisal of Collateral [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Appraisal adjustments	16.00%	64.00%
Fair Value Assumptions, Liquidation expense	8.00%	4.00%
Fair Value Assumptions, Holding period	20 months	19 months
Other Real Estate Owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Estimate	$ 16	$ 37
Fair Value Measurements, Valuation Technique	Appraisal of collateral	Appraisal of collateral
Other Real Estate Owned [Member] | Minimum [Member] | Appraisal of Collateral [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Appraisal adjustments	10.00%	10.00%
Fair Value Assumptions, Liquidation expense	0.00%	0.00%
Other Real Estate Owned [Member] | Maximum [Member] | Appraisal of Collateral [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Appraisal adjustments	30.00%	30.00%
Fair Value Assumptions, Liquidation expense	10.00%	10.00%
Other Real Estate Owned [Member] | Weighted Average [Member] | Appraisal of Collateral [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Appraisal adjustments	10.00%	10.00%
Fair Value Assumptions, Liquidation expense	10.00%	10.00%

Fair Value Measurement - Carryi

Fair Value Measurement - Carrying Amount and Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial Assets:
Cash and due from financial institutions	$ 40,519	$ 36,695	$ 35,561	$ 29,858
Securities available for sale	231,062	195,864
Loans, net of allowance for loan losses	1,151,527	1,042,201
Other securities	14,247	14,055
Bank owned life insurance	25,125	24,552
Accrued interest receivable	4,488	3,854
Financial Liabilities:
Time deposits	223,902
Short-term FHLB advances	10,000
Long-term FHLB advances	15,000	17,500
Securities sold under agreement to repurchase	21,755	28,925	$ 25,040
Carrying Amount [Member]
Financial Assets:
Cash and due from financial institutions	40,519	36,695
Securities available for sale	231,062	195,864
Loans, held for sale	2,197	2,268
Loans, net of allowance for loan losses	1,151,527	1,042,201
Other securities	14,247	14,055
Bank owned life insurance	25,125	24,552
Accrued interest receivable	4,336	3,854
Fair value swap asset	1,560	1,839
Financial Liabilities:
Nonmaturing deposits	981,021	913,677
Time deposits	223,902	207,426
Short-term FHLB advances	56,900	31,000
Long-term FHLB advances	15,000	17,500
Securities sold under agreement to repurchase	21,755	28,925
Subordinated debentures	29,427	29,427
Accrued interest payable	410	181
Swap liability	1,560	1,839
Total Fair Value [Member]
Financial Assets:
Cash and due from financial institutions	40,519	36,695
Securities available for sale	231,062	195,864
Loans, held for sale	2,197	2,268
Loans, net of allowance for loan losses	1,146,969	1,047,329
Other securities	14,247	14,055
Bank owned life insurance	25,125	24,552
Accrued interest receivable	4,336	3,854
Fair value swap asset	1,560	1,839
Financial Liabilities:
Nonmaturing deposits	981,021	913,677
Time deposits	223,626	207,784
Short-term FHLB advances	56,900	31,000
Long-term FHLB advances	14,964	17,553
Securities sold under agreement to repurchase	21,755	28,925
Subordinated debentures	31,052	27,414
Accrued interest payable	410	181
Swap liability	1,560	1,839
(Level 1) [Member]
Financial Assets:
Cash and due from financial institutions	40,519	36,695
Loans, held for sale	2,197	2,268
Other securities	14,247	14,055
Bank owned life insurance	25,125	24,552
Accrued interest receivable	4,336	3,854
Financial Liabilities:
Nonmaturing deposits	981,021	913,677
Short-term FHLB advances	56,900	31,000
Securities sold under agreement to repurchase	21,755	28,925
Accrued interest payable	410	181
(Level 2) [Member]
Financial Assets:
Securities available for sale	231,062	195,864
Fair value swap asset	1,560	1,839
Financial Liabilities:
Swap liability	1,560	1,839
(Level 3) [Member]
Financial Assets:
Loans, net of allowance for loan losses	1,146,969	1,047,329
Financial Liabilities:
Time deposits	223,626	207,784
Long-term FHLB advances	14,964	17,553
Subordinated debentures	$ 31,052	$ 27,414

Commitments, Contingencies a114

Commitments, Contingencies and Off-Balance-Sheet Risk - Contractual Amounts of Financial Instruments with Off-Balance-Sheet Risk (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	$ 5,613	$ 7,510
Variable Rate	322,915	232,347
Lines of Credit and Construction Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	4,982	6,905
Variable Rate	286,925	202,923
Overdraft Protection [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	7	5
Variable Rate	33,353	29,075
Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	624	600
Variable Rate	$ 2,637	$ 349

Commitments, Contingencies a115

Commitments, Contingencies and Off-Balance-Sheet Risk - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Maximum period of commitments to make loans	1 year
Maximum time period of maturities	30 years
Average reserve balance under Federal Reserve Board requirements	$ 4,112	$ 2,887
Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Range of fixed interest rate loan commitments	2.88%	3.25%
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Range of fixed interest rate loan commitments	10.25%	8.50%

Capital Requirements and Res116

Capital Requirements and Restriction on Retained Earnings - Actual Capital Levels and Minimum Required Capital Levels (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Consolidated [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Total Risk Based Capital, Actual, Amount	$ 200,772	$ 155,145
Tier I Risk Based Capital, Actual, Amount	187,638	141,840
CET1 Risk Based Capital, Actual, Amount	140,853	93,463
Leverage, Actual, Amount	$ 187,638	$ 141,840
Total Risk Based Capital, Actual, Ratio	16.60%	14.20%
Tier I Risk Based Capital, Actual, Ratio	15.50%	13.00%
CET1 Risk Based Capital, Actual, Ratio	11.60%	8.60%
Leverage, Actual, Ratio	12.70%	10.60%
Total Risk Based Capital , For Capital Adequacy Purposes, Amount	$ 97,025	$ 87,436
Tier I Risk Based Capital, For Capital Adequacy Purposes, Amount	72,769	65,577
CET1 Risk Based Capital, For Capital Adequacy Purposes, Amount	54,576	49,183
Leverage, For Capital Adequacy Purposes, Amount	$ 59,089	$ 53,774
Total Risk Based Capital , For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier I Risk Based Capital, For Capital Adequacy Purposes, Ratio	6.00%	6.00%
CET1 Risk Based Capital, For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Leverage, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Civista [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Total Risk Based Capital, Actual, Amount	$ 161,394	$ 145,270
Tier I Risk Based Capital, Actual, Amount	147,473	131,391
CET1 Risk Based Capital, Actual, Amount	136,760	120,465
Leverage, Actual, Amount	$ 147,473	$ 131,391
Total Risk Based Capital, Actual, Ratio	13.30%	13.30%
Tier I Risk Based Capital, Actual, Ratio	12.20%	12.00%
CET1 Risk Based Capital, Actual, Ratio	11.30%	11.00%
Leverage, Actual, Ratio	10.00%	9.80%
Total Risk Based Capital , For Capital Adequacy Purposes, Amount	$ 96,880	$ 87,334
Tier I Risk Based Capital, For Capital Adequacy Purposes, Amount	72,660	65,501
CET1 Risk Based Capital, For Capital Adequacy Purposes, Amount	54,495	49,126
Leverage, For Capital Adequacy Purposes, Amount	$ 59,031	$ 53,717
Total Risk Based Capital , For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier I Risk Based Capital, For Capital Adequacy Purposes, Ratio	6.00%	6.00%
CET1 Risk Based Capital, For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Leverage, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Total Risk Based Capital , To Be Well Capitalized Under Prompt Corrective Action Purposes, Amount	$ 121,100	$ 109,168
Tier I Risk Based Capital, To Be Well Capitalized Under Prompt Corrective Action Purposes, Amount	96,880	87,334
CET1 Risk Based Capital, To Be Well Capitalized Under Prompt Corrective Action Purposes, Amount	78,715	70,959
Leverage, To Be Well Capitalized Under Prompt Corrective Action Purposes, Amount	$ 73,788	$ 67,146
Total Risk Based Capital , To Be Well Capitalized Under Prompt Corrective Action Purposes, Ratio	10.00%	10.00%
Tier I Risk Based Capital, To Be Well Capitalized Under Prompt Corrective Action Purposes, Ratio	8.00%	8.00%
CET1 Risk Based Capital, To Be Well Capitalized Under Prompt Corrective Action Purposes, Ratio	6.50%	6.50%
Leverage, To Be Well Capitalized Under Prompt Corrective Action Purposes, Ratio	5.00%	5.00%

Capital Requirements and Res117

Capital Requirements and Restriction on Retained Earnings - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Commitments And Contingencies Disclosure [Abstract]
Net profits available to pay dividends to CBI	$ 36,440

Parent Company Only Condense118

Parent Company Only Condensed Financial Information - Schedule of Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Securities available for sale	$ 231,062	$ 195,864
Other assets	10,707	10,975
Total assets	1,525,857	1,377,263
LIABILITIES
Subordinated debentures	29,427	29,427
Total liabilities	1,341,396	1,239,647
SHAREHOLDERS’ EQUITY
Preferred stock	17,358	18,950
Common stock	153,810	118,975
Accumulated earnings	31,652	19,263
Treasury Stock	17,235	17,235
Accumulated other comprehensive loss	(1,124)	(2,337)
Total shareholders’ equity	184,461	137,616	$ 125,173	$ 115,909
Total liabilities and shareholders’ equity	1,525,857	1,377,263
CBI[Member]
ASSETS
Cash	29,908	4,747	$ 7,493	$ 13,663
Securities available for sale	832	778
Investment in bank subsidiary	167,192	149,965
Investment in nonbank subsidiaries	12,928	12,635
Other assets	5,212	1,226
Total assets	216,072	169,351
LIABILITIES
Deferred income taxes and other liabilities	2,184	2,308
Subordinated debentures	29,427	29,427
Total liabilities	31,611	31,735
SHAREHOLDERS’ EQUITY
Preferred stock	17,358	18,950
Common stock	153,810	118,975
Accumulated earnings	31,652	19,263
Treasury Stock	17,235	17,235
Accumulated other comprehensive loss	(1,124)	(2,337)
Total shareholders’ equity	184,461	137,616
Total liabilities and shareholders’ equity	$ 216,072	$ 169,351

Parent Company Only Condense119

Parent Company Only Condensed Financial Information - Schedule of Condensed Statements of Operations (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
Condensed Financial Statements Captions [Line Items]
Interest expense									$ (4,092)	$ (3,308)	$ (3,309)
Income tax benefit									(6,360)	(6,619)	(4,781)
Net income	$ 3,981	$ 3,660	$ 3,596	$ 4,635	$ 3,631	$ 3,680	$ 5,181	$ 4,725	15,872	17,217	12,745
Comprehensive income									17,284	15,375	12,297
CBI[Member]
Condensed Financial Statements Captions [Line Items]
Dividends from bank subsidiaries											14,226
Interest expense									(1,035)	(884)	(760)
Pension expense									(925)	(184)	(388)
Other expense, net									(1,071)	(920)	(1,755)
Income (loss) before equity in undistributed net earnings of subsidiaries									(3,031)	(1,988)	11,323
Income tax benefit									1,407	676	959
Equity in undistributed net earnings of subsidiaries									17,496	18,529	463
Net income									15,872	17,217	12,745
Comprehensive income									$ 17,284	$ 15,375	$ 12,297

Parent Company Only Condense120

Parent Company Only Condensed Financial Information - Schedule of Condensed 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
Operating activities:
Net income	$ 3,981	$ 3,660	$ 3,596	$ 4,635	$ 3,631	$ 3,680	$ 5,181	$ 4,725	$ 15,872	$ 17,217	$ 12,745
Adjustment to reconcile net income to net cash from (used for) operating activities:
Gain on sale of fixed assets									(67)	(1)
Cash flows used for investing activities:
Proceeds from sale of premises and equipment									139	3
Net cash used for investing activities									(146,180)	(63,575)	(11,904)
Cash flows from financing activities:
Net proceeds from common stock issuance									32,821
Net cash from financing activities									129,185	47,000	2,534
Increase in cash and due from financial institutions									3,824	1,134	5,703
CBI[Member]
Operating activities:
Net income									15,872	17,217	12,745
Adjustment to reconcile net income to net cash from (used for) operating activities:
Change in other assets and other liabilities									(2,147)	1,821	1,324
Gain on sale of fixed assets									(66)
Equity in undistributed net earnings of subsidiaries									(17,496)	(18,529)	(463)
Net cash (used for) from operating activities									(3,837)	509	13,606
Cash flows used for investing activities:
Proceeds from sale of premises and equipment									138
Acquisition and additional capitalization of subsidiary, net of cash acquired									(275)		(16,637)
Net cash used for investing activities									(137)		(16,637)
Cash flows from financing activities:
Cash paid on fractional shares on preferred stock conversion to common stock										(1)
Net proceeds from common stock issuance									32,821
Payment to repurchase common stock									(4)
Cash dividends paid									(3,682)	(3,254)	(3,139)
Net cash from financing activities									29,135	(3,255)	(3,139)
Increase in cash and due from financial institutions									25,161	(2,746)	(6,170)
Cash and cash equivalents at beginning of year				$ 4,747				$ 7,493	4,747	7,493	13,663
Cash and cash equivalents at end of year	$ 29,908				$ 4,747				$ 29,908	$ 4,747	$ 7,493

Preferred Shares - Additional i

Preferred Shares - Additional information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Feb. 15, 2014	Dec. 19, 2013	Dec. 31, 2017	Dec. 31, 2016
Preferred Stock [Line Items]
Preferred shares, liquidation preference			$ 1,000	$ 1,000
Depositary Shares [Member]
Preferred Stock [Line Items]
Newly issued shares		1,000,000
Percentage of ownership Interest		2.50%
Share issued price per share		$ 25
Gross proceeds from public offering		$ 25,000
Shares outstanding			750,382
Series B Preferred Stock [Member]
Preferred Stock [Line Items]
Preferred shares, liquidation preference		$ 1,000
Dividend on preferred stock		6.50%
Series A Preferred Stock [Member]
Preferred Stock [Line Items]
Aggregate purchase price of Preferred stock	$ 22,857
Preferred stock redemption date	Feb. 15, 2014

Earnings per Common Share - Com

Earnings per Common Share - Computation of Basic and Diluted Earnings per Common 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
Basic
Net income	$ 3,981	$ 3,660	$ 3,596	$ 4,635	$ 3,631	$ 3,680	$ 5,181	$ 4,725	$ 15,872	$ 17,217	$ 12,745
Preferred stock dividends									1,244	1,501	1,577
Net income available to common shareholders									$ 14,628	$ 15,716	$ 11,168
Weighted average common shares outstanding for earnings per common share basic									9,906,856	8,010,399	7,822,369
Basic earnings per share	$ 0.36	$ 0.33	$ 0.32	$ 0.47	$ 0.39	$ 0.41	$ 0.61	$ 0.55	$ 1.48	$ 1.96	$ 1.43
Diluted
Net income available to common shareholders—basic									$ 14,628	$ 15,716	$ 11,168
Preferred stock dividends on convertible preferred stock									1,244	1,501	1,577
Net income available to common shareholders—diluted									$ 15,872	$ 17,217	$ 12,745
Weighted average common shares outstanding for earnings per common share basic									9,906,856	8,010,399	7,822,369
Add: dilutive effects of convertible preferred shares									2,445,760	2,940,562	3,095,966
Average shares and dilutive potential common shares outstanding—diluted									12,352,616	10,950,961	10,918,335
Diluted earnings per share	$ 0.30	$ 0.29	$ 0.29	$ 0.40	$ 0.33	$ 0.34	$ 0.47	$ 0.43	$ 1.28	$ 1.57	$ 1.17

Quarterly Financial Data (Un123

Quarterly Financial Data (Unaudited) - Schedule 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
Income Statement [Abstract]
Interest Income	$ 15,838	$ 14,836	$ 14,228	$ 13,692	$ 13,405	$ 13,370	$ 13,739	$ 13,053	$ 58,594	$ 53,567	$ 50,701
Net Interest Income	14,563	13,680	13,367	12,892	12,558	12,526	12,940	12,235	54,502	50,259	47,392
Net income	$ 3,981	$ 3,660	$ 3,596	$ 4,635	$ 3,631	$ 3,680	$ 5,181	$ 4,725	$ 15,872	$ 17,217	$ 12,745
Basic Earnings per Common Share	$ 0.36	$ 0.33	$ 0.32	$ 0.47	$ 0.39	$ 0.41	$ 0.61	$ 0.55	$ 1.48	$ 1.96	$ 1.43
Diluted Earnings per Common Share	$ 0.30	$ 0.29	$ 0.29	$ 0.40	$ 0.33	$ 0.34	$ 0.47	$ 0.43	$ 1.28	$ 1.57	$ 1.17

Derivative Hedging Instrumen124

Derivative Hedging Instruments - Summary of Interest Rate Swap Transactions (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net Exposure, Notional Amount	$ 0	$ 0
Derivative Financial Instruments, Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net Exposure, Notional Amount	$ 66,227,000	$ 52,975,000
Weighted Average Rate Received/(Paid)	5.08%	5.07%
Net Exposure, Impact of a 1 basis point change in interest rates	$ 36,000	$ 30,000
Repricing Frequency	Monthly
Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net Exposure, Notional Amount	$ (66,227,000)	$ (52,975,000)
Weighted Average Rate Received/(Paid)	5.08%	5.07%
Net Exposure, Impact of a 1 basis point change in interest rates	$ (36,000)	$ (30,000)
Repricing Frequency	Monthly

Qualified Affordable Housing125

Qualified Affordable Housing Project Investments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Investments In Affordable Housing Projects [Abstract]
Investments in qualified affordable housing projects included in other assets	$ 3,204,000	$ 2,754,000
Unfunded commitments related to the investments in qualified affordable housing projects	4,510,000	2,313,000
Recognized amortization expense included in pre-tax income	354,000	304,000
Recognized tax credits and other benefits from its investments in affordable housing tax credits	686,000	538,000
Impairment losses related to its investment in qualified affordable housing projects	$ 0	$ 0