CNB Financial (CCNE) 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	Mar. 05, 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	CCNE
Entity Registrant Name	CNB FINANCIAL CORP/PA
Entity Central Index Key	736,772
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		15,284,339
Entity Public Float			$ 344,353,260

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks	$ 33,146	$ 26,937
Interest bearing deposits with other banks	2,199	2,246
Total cash and cash equivalents	35,345	29,183
Securities available for sale	409,709	495,835
Trading securities	7,150	4,858
Loans held for sale	852	7,528
Loans	2,149,848	1,876,966
Less: unearned discount	(3,889)	(3,430)
Less: allowance for loan losses	(19,693)	(16,330)
Net loans	2,126,266	1,857,206
FHLB and other equity interests	21,517	19,186
Premises and equipment, net	50,715	49,522
Bank owned life insurance	55,035	44,273
Mortgage servicing rights	1,387	1,391
Goodwill	38,730	38,730
Core deposit intangible	1,625	2,854
Accrued interest receivable and other assets	20,442	23,255
Total Assets	2,768,773	2,573,821
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing deposits	321,858	289,922
Interest bearing deposits	1,845,957	1,727,600
Total deposits	2,167,815	2,017,522
Short-term borrowings	34,416	103,969
FHLB and other long-term borrowings	222,943	133,035
Subordinated debentures	70,620	70,620
Deposits held for sale	0	6,456
Accrued interest payable and other liabilities	29,069	30,435
Total liabilities	2,524,863	2,362,037
Commitments and contingent liabilities	0	0
Common stock, $0 par value; authorized 50,000,000 shares; issued 15,308,378 shares at December 31, 2017 and 14,473,482 shares at December 31, 2016	0	0
Additional paid in capital	97,042	77,737
Retained earnings	148,298	134,295
Treasury stock, at cost (43,638 shares for 2017 and 5,667 for 2016)	(1,087)	(127)
Accumulated other comprehensive loss	(343)	(121)
Total shareholders' equity	243,910	211,784
Total Liabilities and Shareholders' Equity	$ 2,768,773	$ 2,573,821

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	15,308,378	14,473,482
Treasury stock, shares	43,638	5,667

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest and Dividend Income:
Loans including fees	$ 97,005	$ 81,209	$ 71,814
Securities:
Taxable	8,165	9,134	10,977
Tax-exempt	2,983	3,390	3,778
Dividends	721	582	609
Total interest and dividend income	108,874	94,315	87,178
Interest Expense:
Deposits	9,312	8,470	8,498
Borrowed funds	4,021	2,981	3,222
Subordinated debentures (includes $288, $340, and $378 accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements in 2017, 2016, and 2015)	4,032	1,577	751
Total interest expense	17,365	13,028	12,471
Net Interest Income	91,509	81,287	74,707
Provision for loan losses	6,655	4,149	2,560
Net Interest Income After Provision for Loan Losses	84,854	77,138	72,147
Non-Interest Income:
Service charges on deposit accounts	4,809	4,297	4,442
Other service charges and fees	2,454	2,539	3,089
Wealth and asset management fees	3,724	3,087	2,977
Net realized gains on available-for-sale securities (includes $1,543, $1,005, and $666 accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities in 2017, 2016, and 2015)	1,543	1,005	666
Net realized gains (losses) on trading securities	93	70	(211)
Net unrealized gains (losses) on trading securities	788	433	(2)
Mortgage banking	906	1,095	746
Bank owned life insurance	1,659	1,082	1,194
Card processing and interchange income	3,763	3,396	3,417
Gain on sale of branch	536	0	0
Other	1,160	687	776
Total non-interest income	21,435	17,691	17,094
Non-Interest Expenses:
Salaries	26,205	23,472	21,652
Employee benefits (includes $192, $184, and $173 accumulated other comprehensive income reclassifications for net amortization of actuarial losses in 2017, 2016, and 2015)	9,821	8,722	7,911
Net occupancy expense	9,546	8,064	7,000
Amortization of core deposit intangible	1,229	1,125	1,008
Data processing	3,944	4,447	4,297
State and local taxes	2,815	2,171	1,868
Legal, professional and examination fees	1,819	1,772	1,553
Advertising	2,243	1,799	1,580
FDIC insurance	1,182	1,229	1,278
Directors fees and benefits	915	1,582	812
Prepayment penalties - long-term borrowings	0	1,506	0
Core processing conversion costs	0	1,693	108
Merger costs	0	486	308
Card processing and interchange expenses	2,116	1,889	2,295
Other	8,202	7,161	7,082
Total non-interest expenses	70,037	67,118	58,752
Income Before Income Taxes	36,252	27,711	30,489
Income Tax Expense (includes $372, $168, and $40 income tax expense reclassification items in 2017, 2016, and 2015)	12,392	7,171	8,292
Net Income	23,860	20,540	22,197
Other Comprehensive Income (Loss):
Net change in unrealized (losses) gains on available-for-sale securities, net of reclassification and tax	(1,004)	(2,136)	793
Change in actuarial gain (loss), for post-employment health care plan, net of amortization and tax	825	(64)	(90)
Change in fair value of interest rate swap agreements designated as a cash flow hedge, net of interest and tax	194	180	137
Total other comprehensive (loss) income	15	(2,020)	840
Comprehensive Income	$ 23,875	$ 18,520	$ 23,037
Earnings Per Share:
Basic	$ 1.57	$ 1.42	$ 1.54
Diluted	$ 1.57	$ 1.42	$ 1.54

Consolidated Statements of Inc5

Consolidated Statements of Income and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements	$ 288	$ 340	$ 378
Accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities	1,543	1,005	666
Accumulated other comprehensive income reclassifications for net amortization of actuarial losses	192	184	173
Income tax expense from reclassification	$ 372	$ 168	$ 40

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	$ 23,860	$ 20,540	$ 22,197
Adjustments to reconcile net income to net cash provided by operations:
Provision for loan losses	6,655	4,149	2,560
Depreciation and amortization of premises and equipment, core deposit intangible, and mortgage servicing rights	5,242	4,484	4,039
Amortization and accretion of securities premiums and discounts, deferred loan fees and costs, net yield and credit mark on acquired loans, and unearned income	(1,202)	(1,328)	993
Deferred taxes	3,385	1,023	376
Net realized gains on sales of available-for-sale securities	(1,543)	(1,005)	(666)
Net realized and unrealized losses (gains) on trading securities	(881)	(503)	213
Proceeds from sale of trading securities	1,091	540	2,129
Purchase of trading securities	(2,502)	(319)	(2,413)
Gain on sale of branch	(536)	0	0
Gain on sale of loans	(545)	(818)	(630)
Net losses on dispositions of premises and equipment and foreclosed assets	(107)	134	7
Proceeds from sale of loans	24,285	33,045	14,927
Origination of loans held for sale	(25,231)	(31,255)	(15,171)
Income on bank owned life insurance, including death benefit of proceeds in excess of cash surrender value	(1,659)	(1,082)	(1,194)
Stock-based compensation expense	928	820	621
Contribution of treasury stock	0	150	120
Changes in:
Accrued interest receivable and other assets	(1,175)	(3,906)	93
Accrued interest payable and other liabilities	698	2,095	5,435
Net Cash Provided By Operating Activities	30,763	26,764	33,636
Cash Flows from Investing Activities:
Net decrease in interest bearing time deposits with other banks	0	0	225
Proceeds from maturities, prepayments and calls of available-for-sale securities	92,302	63,837	78,707
Proceeds from sales of available-for-sale securities	16,340	4,420	105,066
Purchase of available-for-sale securities	(23,689)	(21,513)	(45,120)
Loan origination and payments, net	(273,972)	(182,566)	(224,470)
Purchase of bank owned life insurance	(10,000)	0	0
Proceeds from death benefit of BOLI policies	897	0	0
Net cash received from sale of branch	1,079	0	0
Net cash paid for Lake National Bank acquisition	0	(2,866)	0
Purchase of FHLB and other equity interests	(2,331)	(2,628)	(9,226)
Purchase of premises and equipment	(5,215)	(10,125)	(6,751)
Proceeds from the sale of premises and equipment and foreclosed assets	938	558	855
Net Cash Used In Investing Activities	(203,651)	(150,883)	(100,714)
Net change in:
Checking, money market and savings accounts	16,096	79,745	(39,285)
Certificates of deposit	134,197	(10,603)	7,259
Deposits held for sale	1,079	0	0
Purchase of treasury stock	(1,877)	(44)	(868)
Proceeds from stock offering, net of issuance costs	19,294	0	0
Cash dividends paid	(10,094)	(9,546)	(9,515)
Proceeds from long-term borrowings	160,000	80,000	50,000
Repayments on long-term borrowings	(70,092)	(81,317)	(21,472)
Net change in short-term borrowings	(69,553)	17,806	80,292
Proceeds from subordinated debentures	0	50,000	0
Net Cash Provided By Financing Activities	179,050	126,041	66,411
Net Increase (Decrease) in Cash and Cash Equivalents	6,162	1,922	(667)
Cash and Cash Equivalents, Beginning	29,183	27,261	27,928
Cash and Cash Equivalents, Ending	35,345	29,183	27,261
Cash paid during the period for:
Interest	17,481	13,284	12,502
Income taxes	7,810	3,966	5,431
Supplemental Noncash Disclosures:
Transfers to other real estate owned	630	120	806
Grant of restricted stock awards from treasury stock	984	896	803
Net liabilities assumed from Lake National Bank, excluding cash and cash equivalents	0	8,670	0
Net loans transferred to held for sale	0	7,319	0
Net deposits transferred to held for sale	$ 0	$ 6,456	$ 0

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2014	$ 188,548	$ 78,022	$ 110,619	$ (1,152)	$ 1,059
Net income	22,197		22,197
Reclassification of certain tax effects from accumulated other comprehensive income to retained earnings	0
Other comprehensive income (loss)	840				840
Restricted stock award grants		(803)		803
Stock based compensation expense	621	621
Purchase of treasury stock	(868)			(868)
Reissue of treasury stock	90	(13)		103
Cash dividends declared	(9,515)		(9,515)
Ending balance at Dec. 31, 2015	201,913	77,827	123,301	(1,114)	1,899
Net income	20,540		20,540
Reclassification of certain tax effects from accumulated other comprehensive income to retained earnings	0
Other comprehensive income (loss)	(2,020)				(2,020)
Restricted stock award grants		(896)		896
Stock based compensation expense	820	820
Purchase of treasury stock	(44)			(44)
Reissue of treasury stock	121	(14)		135
Cash dividends declared	(9,546)		(9,546)
Ending balance at Dec. 31, 2016	211,784	77,737	134,295	(127)	(121)
Net income	23,860		23,860
Reclassification of certain tax effects from accumulated other comprehensive income to retained earnings	(237)		237		(237)
Other comprehensive income (loss)	15				15
Forfeiture of restricted stock award grants		67		(67)
Restricted stock award grants		(984)		984
Stock based compensation expense	928	928
Issuance of common stock, net of issuance costs	19,294	19,294
Purchase of treasury stock	(1,877)			(1,877)
Cash dividends declared	(10,094)		(10,094)
Ending balance at Dec. 31, 2017	$ 243,910	$ 97,042	$ 148,298	$ (1,087)	$ (343)

Consolidated Statements of Cha8

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Forfeiture of restricted stock award grants shares	2,482
Restricted stock award grants, shares	39,673
Issuance of common stock, net of issuance costs,shares	894,896
Purchase of treasury stock, shares	75,162	1,298	51,052
Reissue of treasury stock, shares		7,933	6,766
Cash dividends declared, per share	$ 0.66	$ 0.66	$ 0.66
Additional Paid-In Capital [Member]
Forfeiture of restricted stock award grants shares	2,482
Restricted stock award grants, shares	39,673	52,750	48,300
Issuance of common stock, net of issuance costs,shares	834,896
Purchase of treasury stock, shares	75,162
Reissue of treasury stock, shares		7,933	6,766
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.66	$ 0.66	$ 0.66
Treasury Stock [Member]
Forfeiture of restricted stock award grants shares	2,482
Restricted stock award grants, shares	39,673	52,750	48,300
Purchase of treasury stock, shares	75,162	1,298	51,052
Reissue of treasury stock, shares		7,933	6,766

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Unless otherwise indicated, dollar amounts are in thousands, except per share data. Business and Organization CNB Financial Corporation (the “Corporation”) is headquartered in Clearfield, Pennsylvania, and provides a full range of banking and related services through its wholly owned subsidiary, CNB Bank (the “Bank”). In addition, the Bank provides trust and asset management services, including the administration of trusts and estates, retirement plans, and other employee benefit plans as well as a full range of wealth management services. The Bank serves individual and corporate customers and is subject to competition from other financial institutions and intermediaries with respect to these services. In addition to the Bank, the Corporation also operates a consumer discount loan and finance business through its wholly owned subsidiary, Holiday Financial Services Corporation (“Holiday”). The Corporation and these and its other subsidiaries are subject to examination by federal and state regulators. The Corporation’s market area is primarily concentrated in the central and northwest regions of the Commonwealth of Pennsylvania, the central and northeast regions of the state of Ohio and western New York. Basis of Financial Presentation The financial statements are consolidated to include the accounts of the Corporation and the Bank, CNB Securities Corporation, Holiday, and CNB Insurance Agency. All significant intercompany accounts and transactions have been eliminated in the consolidated financial statements. Certain prior period amounts have been reclassified to conform to the current period presentation. Reclassifications had no effect on prior year net income or shareholders’ equity. Use of Estimates To prepare financial statements in conformity with accounting principles generally accepted in the U.S., management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Operating Segments While the chief decision-makers monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Corporation-wide basis, and operating segments are aggregated into one as operating results for all segments are similar. Accordingly, all of the financial service operations are considered by management to be aggregated in one reportable operating segment. Securities When purchased, securities are classified as held to maturity, trading or available for sale. Debt securities are classified as held to maturity when the Corporation has the positive intent and ability to hold the securities to maturity. Held to maturity securities are carried at amortized cost. Debt or equity securities are classified as trading when purchased principally for the purpose of selling them in the near term, or when the fair value option has been elected. Trading securities are recorded at fair value with changes in fair value included in earnings in non-interest income. Available for sale securities are those securities not classified as held to maturity or trading and are carried at their fair value. Unrealized gains and losses, net of deferred tax, on securities classified as available for sale are recorded as other comprehensive income. Management has not classified any debt securities as held to maturity. The amortized cost of debt securities classified as held to maturity or available for sale is adjusted for the amortization of premiums and the accretion of discounts over the period through contractual maturity or, in the case of mortgage-backed securities and collateralized mortgage obligations, over the estimated life of the security. Such amortization is included in interest income from securities. Gains and losses on securities sold are recorded on the trade date and based on the specific identification method. Declines in the fair value of debt securities below their cost that are other-than-temporary and attributable to credit losses are reflected in earnings. Other-than-temporary impairment losses that are not attributable to credit losses are reported as a component of accumulated other comprehensive income. In estimating other-than-temporary losses, management considers: the length of time and extent that fair value has been less than cost, the financial condition and near term prospects of the issuer, and the Corporation’s intent to sell, or whether it is more likely than not that it will be required to sell a security in an unrealized loss position before recovery of its amortized cost basis. If the Corporation intends to sell a security or it is more likely than not it will be required to sell a security before recovery of its amortized cost basis, the entire difference between amortized cost and fair value is recognized as impairment through earnings. Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding. Interest income is reported on the interest method and includes amortization of net deferred loan fees and costs over the loan term. Interest income on commercial, industrial, and agricultural loans, commercial mortgage loans, and residential real estate loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Consumer loans are typically charged off no later than 180 days past due. Past due status is based on the contractual terms of the loan. Loans, including loans modified in a troubled debt restructuring, are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. Nonaccrual loans and loans past due 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. All interest accrued but not received on 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. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. For all portfolio segments, loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Concentration of Credit Risk Most of the Corporation’s business activity is with customers located within the Commonwealth of Pennsylvania and the states of Ohio and New York. Therefore, the Corporation’s exposure to credit risk is significantly affected by changes in the economies of Pennsylvania, Ohio, and New York. Purchased Loans The Corporation purchased loans in connection with its acquisition of FC Banc Corp. in 2013 and Lake National Bank in 2016, some of which had, at the acquisition date, shown evidence of credit deterioration since origination. These purchased credit impaired loans were recorded at the amount paid, such that there was no carryover of the seller’s allowance for loan losses. Such purchased credit impaired loans are accounted for individually, and the Corporation estimates the amount and timing of expected cash flows for each loan. The expected cash flows in excess of the amount paid is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan, 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 the expected cash flows is greater than the carrying amount, it is recognized as part of future interest income. For loans purchased that did not show evidence of credit deterioration, the difference between the fair value of the loan at the acquisition date and the loan’s face value is being amortized as a yield adjustment over the estimated remaining life of the loan using the effective interest method. Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Mortgage loans held for sale are generally sold with servicing rights retained. The carrying value of the mortgage loan sold is reduced by the amount allocated to the servicing right. Gains and losses on sales of mortgage loans are based on the difference between the selling price and the carrying value of the related loan sold. Allowance for Loan Losses The allowance for loan losses is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance account. Management determines the adequacy of the allowance based on historical patterns of charge-offs and recoveries, the nature and volume of the portfolio, information about specific borrower situations and estimated collateral values, industry experience, economic conditions, and other qualitative factors relevant to the collectability of the loan portfolio. While management believes that the allowance is adequate to absorb probable loan losses incurred at the balance sheet date, future adjustments may be necessary due to circumstances that differ substantially from the assumptions used in evaluating the adequacy of the allowance for loan losses. The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. A loan is impaired when, based on current information and events, it is probable that the Corporation will be unable to collect all amounts due according to the contractual terms of the loan agreement. Loans for which the terms have been modified, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings and classified as impaired. Commercial and commercial real estate loans are individually evaluated for impairment. If a loan is impaired, a portion of the allowance is allocated so that the loan is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. Large groups of smaller balance homogeneous loans, such as consumer and residential real estate loans, are collectively evaluated for impairment, and accordingly, they are not separately identified for impairment disclosures. Troubled debt restructurings are measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. For troubled debt restructurings that subsequently default, the Corporation determines the amount of reserve in accordance with the accounting policy for the allowance for loan losses. The general component of the allowance for loan losses covers non-impaired The following portfolio segments, which are the same as the Corporation’s portfolio classifications and associated risk characteristics, have been identified: ● Commercial, industrial, and agricultural – risk characteristics include below average economic and employment conditions in many of the markets served by the Corporation, which has limited consumer spending. ● Commercial mortgages – the most significant risk characteristic is the subjectivity involved in real estate valuations for properties located in areas with low growth economies. ● Residential real estate – risk characteristics include slightly higher than historical levels of delinquencies and less than robust housing markets. ● Consumer – risk characteristics include continuing weakness in industrial employment in many of the markets served by the Corporation and low wage growth. ● Credit cards – the most significant risk characteristic is the unsecured nature of credit card loans. ● Overdrafts – risk characteristics include the Corporation’s continued deposit growth and overall economic conditions which may lead to a greater likelihood of overdrawn deposit accounts. Federal Home Loan Bank (FHLB) Stock As a member of the Federal Home Loan Bank of Pittsburgh (“FHLB”), the Corporation is required to purchase and hold stock in the FHLB to satisfy membership and borrowing requirements. This stock is restricted in that it can only be sold to the FHLB or to another member institution, and all sales of FHLB stock must be at par. As a result of these restrictions, FHLB stock is unlike other investment securities insofar as there is no trading market for FHLB stock and the transfer price is determined by FHLB membership rules and not by market participants. FHLB stock is held as a long-term investment, is valued at its cost basis and is analyzed for impairment based on the ultimate recoverability of the par value. The Company evaluates impairment quarterly. The decision of whether impairment exists is a matter of judgment that reflects our view of the FHLB’s long-term performance, which includes factors such as the following: ● its operating performance; ● the severity and duration of declines in the fair value of its net assets related to its capital stock amount; ● its commitment to make payments required by law or regulation and the level of such payments in relation to its operating performance; ● the impact of legislative and regulatory changes on the FHLB, and accordingly, on the members of FHLB; and ● its liquidity and funding position. Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation. Depreciation of premises and equipment is computed principally by the straight line method. In general, useful lives range from 3 to 39 years with lives for furniture, fixtures and equipment ranging from 3 to 10 years and lives of buildings and building improvements ranging from 15 to 39 years. Amortization of leasehold improvements is computed using the straight-line method over useful lives of the leasehold improvements or the term of the lease, whichever is shorter. Maintenance, repairs and minor renewals are charged to expense as incurred. Foreclosed Assets Assets acquired through or in lieu of loan foreclosure are initially recorded at fair value less estimated selling costs when acquired, establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. These assets are subsequently accounted for at the lower of cost or fair value, less estimated costs to sell. If fair value declines, a valuation allowance is recorded through expense. Costs after acquisition are expensed. Bank Owned Life Insurance The Corporation has purchased life insurance policies on certain key employees. Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Goodwill and Other Intangible Assets Goodwill resulting from business combinations prior to January 1, 2009 represents the excess of the purchase price over the fair value of the net assets of businesses acquired. Goodwill resulting from business combinations after January 1, 2009 is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interest in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exist that indicate an impairment test should be performed. The Corporation has selected December 31 as the date to perform the annual impairment test. Intangible assets with definite useful lives are amortized over their estimated useful lives. Goodwill is the only intangible asset with an indefinite life on the Corporation’s balance sheet. Other intangible assets consist of core deposit intangible assets arising from the acquisition of FC Banc Corp. in 2013 and Lake National Bank in 2016. The core deposit intangible assets from these acquisitions are amortized using an accelerated method over their estimated useful lives of 7 years and 4 years, respectively. Long-term Assets Premises and equipment, goodwill and other intangible assets, and other long-term assets are reviewed for impairment when events indicate their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value. Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded. Derivatives Derivative financial instruments are recognized as assets or liabilities at fair value. The Corporation has interest rate swap agreements which are used as part of its asset liability management to help manage interest rate risk. The Corporation does not use derivatives for trading purposes. At the inception of a derivative contract, the Corporation designates the derivative as one of three types based on the purpose of the contract and belief as to its effectiveness as a hedge. These three types are (1) a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (“fair value hedge”), (2) a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) an instrument with no hedging designation (“stand-alone derivative”). For a fair value hedge, the gain or loss on the derivative, as well as the offsetting loss or gain on the hedged item, are recognized in current earnings as fair values change. For a cash flow hedge, the gain or loss on the derivative is reported in other comprehensive income and is reclassified into earnings in the same periods during which the hedged transaction affects earnings. For both types of hedges, changes in the fair value of derivatives that are not highly effective in hedging the changes in fair value or expected cash flows of the hedged item are recognized immediately in current earnings. Changes in the fair value of derivatives that do not qualify for hedge accounting are reported currently in earnings, as non-interest income. Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in non-interest income. Cash flows on hedges are classified in the cash flow statement the same as the cash flows of the items being hedged. The Corporation formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions, at the inception of the hedging relationship. This documentation includes linking fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. The Corporation also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Corporation discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as non-interest income. When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability. When a cash flow hedge is discontinued but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings. Advertising Costs Advertising costs are generally expensed as incurred and amounted to $2,243, $1,799 and $1,580, for 2017, 2016, and 2015, respectively. Mortgage Servicing Rights Servicing rights are recognized separately when they are acquired through sales of loans. Servicing rights are initially recorded at fair value with the income statement effect recorded in mortgage banking. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds and default rates and losses. The Corporation compares the valuation model inputs and results to published industry data in order to validate the model results and assumptions. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into non-interest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to carrying amount. Impairment is determined by stratifying rights into groupings based on predominant risk characteristics, such as interest rate, loan type and investor type. Impairment is recognized through a valuation allowance for an individual grouping, to the extent that fair value is less than the carrying amount. If the Corporation later determines that all or a portion of the impairment no longer exists for a particular grouping, a reduction of the allowance may be recorded as an increase to income. Changes in valuation allowances are reported with mortgage banking income on the income statement. The fair values of servicing rights are subject to significant fluctuations as a result of changes in estimated and actual prepayment speeds and default rates and losses. Servicing fee income, which is reported on the income statement as mortgage banking income, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income. Late fees and ancillary fees related to loan servicing are not material. Treasury Stock The purchase of the Corporation’s common stock is recorded at cost. Purchases of the stock are made in the open market based on market prices. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock on a first-in-first-out basis. Stock-Based Compensation The Corporation has a stock incentive plan for key employees and independent directors. The Stock Incentive Plan, which is administered by a committee of the Board of Directors, provides for up to 500,000 shares of common stock to be awarded in the form of nonqualified options or restricted stock. For key employees, the plan vesting schedule is one-fourth of granted stock-based awards per year beginning one year after the grant date with 100% vested on the fourth anniversary. For independent directors, the vesting schedule is one-third of granted stock-based awards per year beginning one year after the grant date with 100% vested on the third anniversary. At December 31, 2017 and 2016, there was no unrecognized compensation cost related to nonvested stock options granted under this plan, and no stock options were granted during the years ended December 31, 2017, 2016, and 2015. During 2017, 2016, and 2015, the Executive Compensation and Personnel Committee of the Board of Directors granted a total of 39,673, 52,750 and 48,300 shares, respectively, of restricted common stock to certain key employees and all independent directors of the Corporation. Compensation expense for the restricted stock awards is recognized over the requisite service period based on the fair value of the shares at the date of grant on a straight-line basis. Compensation expense resulting from these restricted stock awards was $928, $820 and $621 for the years ended December 31, 2017, 2016, and 2015, respectively. Comprehensive Income The Corporation presents comprehensive income as part of the Consolidated Statement of Income and Comprehensive Income. Other comprehensive income (loss) consists of unrealized holding gains (losses) on the available for sale securities portfolio, changes in the unrecognized actuarial gain and transition obligation related to the Corporation’s post retirement benefits plans, and changes in the fair value of the Corporation’s interest rate swaps, net of tax. Income Taxes The Corporation files a consolidated U.S. income tax return that includes all subsidiaries. Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Corporation recognizes interest and/or penalties related to income tax matters in income tax expense. Retirement Plans The Corporation’s expense associated with its 401(k) plan is determined under the provisions of the plan document and includes both matching and profit sharing components. Deferred compensation and supplemental retirement plan expenses allocate the benefits over years of service. Earnings Per Share Basic earnings per share is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding during the applicable period, excluding outstanding participating securities. Diluted earnings per share is computed using the weighted average number of shares determined for the basic computation plus the dilutive effect of potential common shares issuable under certain stock compensation plans. Unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and are included in the computation of earnings per share pursuant to the two-class method. The Corporation has determined that its outstanding non-vested stock awards are participating securities. Cash and Cash Equivalents For purposes of the consolidated statement of cash flows, the Corporation defines cash and cash equivalents as cash and due from banks, interest bearing deposits with other banks, and Federal funds sold. Net cash flows are reported for customer loan and deposit transactions, interest bearing time deposits with other banks and borrowings with original maturities of 90 days or less. Restrictions on Cash The Bank is required to maintain average reserve balances with the Federal Reserve Bank or in vault cash. The average amount of these non-interest bearing reserve balances for the year ended December 31, 2017 and 2016 was $50, which was maintained in vault cash. Note 12 to the consolidated financial statements discloses the cash collateral balances required to be maintained in connection with the Corporation’s interest rate swaps. Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are any such matters that will have a material effect on the financial statements. Fair Value of Financial Instruments Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in a separate note. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates. Adoption of New Accounting Standards In March 2016, the FASB issued Accounting Standards Update 2016-09, “Compensation-Stock Compensation: Improvements to Employee Share-Based Payment Accounting.” ASU 2016-09 will require recognition of the income tax effects of share-based awards in the income statement when the awards vest or are settled (i.e., Additional Paid-in-Capital pools will be eliminated). The guidance was effective for interim and annual reporting periods beginning after December 15, 2016. The Corporation adopted ASU 2016-09 on January 1, 2017. The adoption did not have a material effect on the Corporation’s financial statements. In August 2016, the FASB issued an update (ASU 2016-15, Statement of Cash Flows) which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments in this Update apply to all entities, including business entities and not-for-profit entities that are required to present a statement of cash flows, and are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Corporation adopted ASU 2016-15 on January 1, 2018. The adoption did not have a material effect on the Corporation’s financial statements. On February 14, 2018, the Financial Accounting Standard Board issued Accounting Standards Update (ASU) No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this ASU allow, but do not require, entities to reclassify certain income tax effects in accumulated other comprehensive income (AOCI) to retained earnings that resulted from the Tax Cuts and Jobs Act (Act). The Corporation adopted this ASU and elected to reclassify the income tax effects of the Act from accumulated other comprehensive income to retained earnings at December 31, 2017. There were n

Business Combination and Branch

Business Combination and Branch Sale	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Business Combination and Branch Sale	2. Business Combination and Branch Sale On December 30, 2015, the Corporation announced the signing of a definitive merger agreement to acquire Lake National Bank (LNB) of Mentor, Ohio for $22.50 per share in cash, or approximately $24.75 million in the aggregate. LNB served the northeastern Ohio market with two branches located in Mentor, Ohio. On July 15, 2016, the transaction closed and the Corporation began including LNB’s results of operations in its consolidated results. The two LNB offices now operate as part of the ERIEBANK division of CNB Bank. As disclosed in the accompanying consolidated statements of income, the Corporation incurred merger costs of $486 thousand and $308 thousand for the twelve months ended December 31, 2016 and 2015, respectively. All merger costs have been expensed as incurred. The following table summarizes the consideration paid for LNB and the amounts of the assets acquired and liabilities assumed that were recognized at the acquisition date: Consideration paid: Cash $ 24,750 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 21,884 Securities available for sale 450 Loans 122,206 FHLB and other equity interests 637 Premises and equipment 3,242 Bank owned life insurance 2,152 Mortgage servicing rights 367 Core deposit intangible 1,583 Accrued interest receivable and other assets 3,110 Total assets acquired 155,631 Demand deposits 81,472 Time deposits 58,311 Accrued interest payable and other liabilities 2,634 Total liabilities assumed 142,417 Total identifiable net assets 13,214 Goodwill $ 11,536 Included in accrued interest receivable and other assets is a deferred tax asset of $58 which represents the tax effect of temporary differences between the tax basis and fair values assigned to the assets and liabilities. Acquired loans were recorded at fair value with no carryover of the related allowance for loan losses. Determining the fair value of loans involved estimating the amount and timing of principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. The Corporation acquired $126,134 of gross loans and recognized a net combined yield and credit mark of $3,928. Goodwill of $11,536 arising from the acquisition consisted largely of synergies and the cost savings resulting from the combining of the operations of the Corporation and Lake National Bank. None of the goodwill is expected to be deductible for income tax purposes. On May 19, 2017, CNB completed its previously announced sale of the Mt. Hope, Ohio branch to First Federal Community Bank. CNB transferred loans totaling $7,800, fixed assets totaling $100, and deposits totaling $7,400 in conjunction with the sale of the branch and realized a gain of $536 based on the 8% deposit premium paid by First Federal Community Bank.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	3. Earnings Per Share The computation of basic and diluted earnings per share is shown below (in thousands, except per share data). There were no anti-dilutive stock options for the years ended December 31, 2017, 2016, and 2015. Years Ended December 31 2017 2016 2015 Basic earnings per common share computation Net income per consolidated statements of income $ 23,860 $ 20,540 $ 22,197 Net earnings allocated to participating securities (135 ) (129 ) (117 ) Net earnings allocated to common stock $ 23,725 $ 20,411 $ 22,080 Distributed earnings allocated to common stock $ 10,030 $ 9,480 $ 9,460 Undistributed earnings allocated to common stock 13,695 10,931 12,620 Net earnings allocated to common stock $ 23,725 $ 20,411 $ 22,080 Weighted average common shares outstanding, including shares considered participating securities 15,212 14,457 14,408 Less: Average participating securities (80 ) (82 ) (70 ) Weighted average shares 15,132 14,375 14,338 Basic earnings per common share $ 1.57 $ 1.42 $ 1.54 Diluted earnings per common share computation Net earnings allocated to common stock $ 23,725 $ 20,411 $ 22,080 Weighted average common shares outstanding for basic earnings per common share 15,132 14,375 14,338 Add: Dilutive effects of assumed exercises of stock options 0 0 0 Weighted average shares and dilutive potential common shares 15,132 14,375 14,338 Diluted earnings per common share $ 1.57 $ 1.42 $ 1.54

Securities

Securities	12 Months Ended
	Dec. 31, 2017
Cash and Cash Equivalents [Abstract]
Securities	4. Securities Securities available-for-sale at December 31, 2017 and 2016 are as follows: December 31, 2017 December 31, 2016 Amortized Cost Unrealized Fair Value Amortized Cost Unrealized Fair Value Gains Losses Gains Losses U.S. Gov’t sponsored entities $108,578 $ 478 $ (908 ) $108,148 $139,823 $1,107 $ (579 ) $140,351 State & political subdivisions 134,428 3,609 (314) 137,723 153,492 4,194 (649 ) 157,037 Residential & multi-family mortgage 111,214 304 (1,882) 109,636 136,807 551 (2,382 ) 134,976 Corporate notes & bonds 17,610 52 (462) 17,200 18,299 77 (962 ) 17,414 Pooled trust preferred 0 0 0 0 800 1,249 0 2,049 Pooled SBA 36,260 355 (575) 36,040 43,450 505 (918 ) 43,037 Other equity securities 1,020 0 (58) 962 1,020 0 (49 ) 971 Total $409,110 $ 4,798 $ (4,199 ) $409,709 $493,691 $7,683 $(5,539) $495,835 At December 31, 2017 and 2016, there were no holdings of securities by any one issuer, other than U.S. Government sponsored entities, in an amount greater than 10% of shareholders’ equity. The Corporation’s residential and multi-family mortgage securities are issued by government sponsored entities, and the Corporation holds one commercial mortgage security that is private label. Trading securities at December 31, 2017 and 2016 are as follows: 2017 2016 Corporate equity securities $ 5,125 $ 3,312 Mutual Funds 1,499 1,037 Certificates of deposit 220 202 Corporate notes and bonds 254 254 U.S. Government sponsored entities 52 53 Total $ 7,150 $ 4,858 Securities with unrealized losses at December 31, 2017 and 2016, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows: December 31, 2017 Less than 12 Months 12 Months or More Total Description of Securities Fair Unrealized Fair Unrealized Fair Unrealized U.S. Gov’t sponsored entities $ 55,696 $ (540 ) $ 34,754 $ (368 ) $ 90,450 $ (908 ) State & political subdivisions 15,890 (69 ) 4,104 (245 ) 19,994 (314 ) Residential & multi-family mortgage 30,144 (153 ) 63,699 (1,729 ) 93,843 (1,882 ) Corporate notes & bonds 5,005 (9 ) 9,042 (453 ) 14,047 (462 ) Pooled SBA 0 (0 ) 22,270 (575 ) 22,270 (575 ) Other equity securities 0 (0 ) 962 (58 ) 962 (58 ) $ 106,735 $ (771 ) $ 134,831 $ (3,428 ) $ 241,566 $ (4,199 ) Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2016 U.S. Gov’t sponsored entities $ 90,380 $ (579 ) $ 0 $ (0 ) $ 90,380 $ (579 ) State & political subdivisions 32,353 (448 ) 264 (201 ) 32,617 (649 ) Residential and multi-family mortgage 65,598 (1,255 ) 34,611 (1,127 ) 100,209 (2,382 ) Corporate notes & bonds 2,089 (11 ) 8,476 (951 ) 10,565 (962 ) Pooled SBA 6,481 (126 ) 20,560 (792 ) 27,041 (918 ) Other equity securities 0 (0 ) 971 (49 ) 971 (49 ) $ 196,901 $ (2,419 ) $ 64,882 $ (3,120 ) $ 261,783 $ (5,539 ) The Corporation evaluates securities for other-than-temporary impairment on a quarterly basis, or more frequently when economic or market conditions warrant such an evaluation. At December 31, 2016 the Corporation evaluated the pooled trust preferred securities for other-than-temporary impairment by estimating the cash flows expected to be received, taking into account future estimated levels of deferrals and defaults by the underlying issuers and discounting those cash flows at the appropriate accounting yield. During 2017, two structured pooled trust preferred securities with an adjusted amortized cost of $800 were sold, resulting in a gain of $1,383. During 2016, two structured pooled trust preferred securities with an adjusted amortized cost of $0 were sold, resulting in a gain of $922. A roll-forward of the other-than-temporary impairment amount related to credit losses for the years ended December 31, 2017, 2016, and 2015 is as follows: 2017 2016 2015 Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in earnings, beginning of period $ 2,071 $ 4,054 $ 4,054 Credit losses previously recognized on securities sold during the period (2,071 ) (1,983 ) 0 Additional credit loss for which other-than-temporary impairment was not previously recognized 0 0 0 Additional credit loss for which other-than-temporary impairment was previously recognized 0 0 0 Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in earnings, end of period $ 0 $ 2,071 $ 4,054 For the securities that comprise corporate notes and bonds and the securities that are issued by state and political subdivisions, management monitors publicly available financial information, such as filings with the Securities and Exchange Commission, in order to evaluate the securities for other-than-temporary impairment. For financial institution issuers, management monitors information from quarterly “call” report filings that are used to generate Uniform Bank Performance Reports. All other securities that were in an unrealized loss position at the balance sheet date were reviewed by management, and issuer-specific documents were reviewed, as appropriate given the following considerations. When reviewing securities for other-than-temporary impairment, management considers the financial condition and near-term prospects of the issuer and whether downgrades by bond rating agencies have occurred. Management also considers the length of time and extent to which fair value has been less than cost, and whether management does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. As of December 31, 2017 and 2016, management concluded that the securities described in the previous paragraph were not other-than-temporarily impaired for the following reasons: ● There is no indication of any significant deterioration of the creditworthiness of the institutions that issued the securities. ● All contractual interest payments on the securities have been received as scheduled, and no information has come to management’s attention through the processes previously described which would lead to a conclusion that future contractual payments will not be timely received. The Corporation does not intend to sell and it is not more likely than not that it will be required to sell the securities in an unrealized loss position before recovery of its amortized cost basis. On December 31, 2017 and 2016, securities carried at $319,575 and $329,379, respectively, were pledged to secure public deposits and for other purposes as provided by law. The following is a schedule of the contractual maturity of securities available for sale, excluding equity securities, at December 31, 2017: December 31, 2017 Amortized Cost Fair Value 1 year or less $ 50,368 $ 50,139 1 year – 5 years 153,512 155,075 5 years – 10 years 50,552 51,753 After 10 years 6,184 6,104 260,616 263,071 Residential and multi-family mortgage 111,214 109,636 Pooled SBA 36,260 36,040 Total debt securities $ 408,090 $ 408,747 Mortgage securities and pooled SBA securities are not due at a single date; periodic payments are received based on the payment patterns of the underlying collateral. Information pertaining to security sales is as follows: Year ended December 31 Proceeds Gross Gains Gross Losses 2017 $ 16,340 $ 1,614 $ 71 2016 4,420 1,005 0 2015 105,066 1,032 366 The tax provision related to these net realized gains was $540, $352 and $233, respectively. During 2017, 2016, and 2015, the Corporation sold trading securities. Proceeds were $1,091 in 2017, $540 in 2016 and $2,129 in 2015, resulting in net realized gains (losses) of $93 in 2017, $70 in 2016, and ($211) in 2015.

Loans

Loans	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Loans	5. Loans Total net loans at December 31, 2017 and 2016 are summarized as follows: 2017 2016 Commercial, industrial, and agricultural $ 749,138 $ 567,800 Commercial mortgages 600,065 574,826 Residential real estate 713,347 652,883 Consumer 80,193 74,816 Credit cards 6,753 6,046 Overdrafts 352 595 Less: unearned discount (3,889 ) (3,430 ) allowance for loan losses (19,693 ) (16,330 ) Loans, net $ 2,126,266 $ 1,857,206 At December 31, 2017 and 2016 net unamortized loan (fees) costs of ($2,574) and ($1,507), respectively, have been included in the carrying value of loans. The Corporation’s outstanding loans and related unfunded commitments are primarily concentrated within central and northwest Pennsylvania, central and northeast Ohio, and western New York. The Bank attempts to limit concentrations within specific industries by utilizing dollar limitations to single industries or customers, and by entering into participation agreements with third parties. Collateral requirements are established based on management’s assessment of the customer. The Corporation maintains lending policies to control the quality of the loan portfolio. These policies delegate the authority to extend loans under specific guidelines and underwriting standards. These policies are prepared by the Corporation’s management and reviewed and ratified annually by the Corporation’s Board of Directors. Pursuant to the Corporation’s lending policies, management considers a variety of factors when determining whether to extend credit to a customer, including loan-to-value ratios, FICO scores, quality of the borrower’s financial statements, and the ability to obtain personal guarantees. Commercial, industrial, and agricultural loans comprised 35% and 30% of the Corporation’s total loan portfolio at December 31, 2017 and 2016, respectively. Commercial mortgage loans comprised 28% and 31% of the Corporation’s total loan portfolio at December 31, 2017 and 2016, respectively. Management assigns a risk rating to all commercial loans at loan origination. The loan-to-value policy guidelines for commercial, industrial, and agricultural loans are generally a maximum of 80% of the value of business equipment, a maximum of 75% of the value of accounts receivable, and a maximum of 60% of the value of business inventory at loan origination. The loan-to-value policy guideline for commercial mortgage loans is generally a maximum of 85% of the appraised value of the real estate. Residential real estate loans comprised 33% and 35% of the Corporation’s total loan portfolio at December 31, 2017 and 2016, respectively. The loan-to-value policy guidelines for residential real estate loans vary depending on the collateral position and the specific type of loan. Higher loan-to-value terms may be approved with the appropriate private mortgage insurance coverage. The Corporation also originates and prices loans for sale into the secondary market. Loans so originated are classified as loans held for sale and are excluded from residential real estate loans reported above. The rationale for these sales is to mitigate interest rate risk associated with holding lower rate, long-term residential mortgages in the loan portfolio and to generate fee revenue from sales and servicing the loan. The Corporation also offers a variety of unsecured and secured consumer loan and credit card products which represent less than 10% of the total loan portfolio at both December 31, 2017 and 2016. Terms and collateral requirements vary depending on the size and nature of the loan. Transactions in the allowance for loan losses for the year ended December 31, 2017 were as follows: Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses, January 1, 2017 $ 5,428 $ 6,753 $ 1,653 $ 2,215 $ 93 $ 188 $ 16,330 Charge-offs (544 ) (116 ) (466 ) (2,555 ) (144 ) (252 ) (4,077 ) Recoveries 235 197 78 161 27 87 785 Provision for loan losses 1,041 2,173 768 2,358 144 171 6,655 Allowance for loan losses, December 31, 2017 $ 6,160 $ 9,007 $ 2,033 $ 2,179 $ 120 $ 194 $ 19,693 Transactions in the allowance for loan losses for the year ended December 31, 2016 were as follows: Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses, January 1, 2016 $ 6,035 $ 5,605 $ 2,475 $ 2,371 $ 90 $ 161 $ 16,737 Charge-offs (601 ) (201 ) (499 ) (3,324 ) (96 ) (240 ) (4,961 ) Recoveries 89 8 93 122 22 71 405 Provision for loan losses (95 ) 1,341 (416 ) 3,046 77 196 4,149 Allowance for loan losses, December 31, 2016 $ 5,428 $ 6,753 $ 1,653 $ 2,215 $ 93 $ 188 $ 16,330 Transactions in the allowance for loan losses for the year ended December 31, 2015 were as follows: Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses, January 1, 2015 $ 7,114 $ 5,310 $ 2,479 $ 2,205 $ 71 $ 194 $ 17,373 Charge-offs (307 ) (486 ) (632 ) (1,956 ) (116 ) (221 ) (3,718 ) Recoveries 267 52 8 96 14 85 522 Provision for loan losses (1,039 ) 729 620 2,026 121 103 2,560 Allowance for loan losses, December 31, 2015 $ 6,035 $ 5,605 $ 2,475 $ 2,371 $ 90 $ 161 $ 16,737 The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and is based on the Corporation’s impairment method as of December 31, 2017 and 2016. The recorded investment in loans excludes accrued interest and unearned discounts due to their insignificance. December 31, 2017 Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 47 $ 0 $ 0 $ 0 $ 0 $ 0 $ 47 Collectively evaluated for impairment 5,868 3,563 2,033 2,179 120 194 13,957 Acquired with deteriorated credit quality 0 0 0 0 0 0 0 Modified in a troubled debt restructuring 245 5,444 0 0 0 0 5,689 Total ending allowance balance $ 6,160 $ 9,007 $ 2,033 $ 2,179 $ 120 $ 194 $ 19,693 Loans: Individually evaluated for impairment $ 1,187 $ 51 $ 0 $ 0 $ 0 $ 0 $ 1,238 Collectively evaluated for impairment 742,738 586,845 713,347 80,193 6,753 352 2,130,228 Acquired with deteriorated credit quality 0 1,079 0 0 0 0 1,079 Modified in a troubled debt restructuring 5,213 12,090 0 0 0 0 17,303 Total ending loans balance $ 749,138 $ 600,065 $ 713,347 $ 80,193 $ 6,753 $ 352 $ 2,149,848 December 31, 2016 Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 188 $ 996 $ 0 $ 0 $ 0 $ 0 $ 1,184 Collectively evaluated for impairment 5,115 3,543 1,653 2,215 93 188 12,807 Acquired with deteriorated credit quality 0 0 0 0 0 0 0 Modified in a troubled debt restructuring 125 2,214 0 0 0 0 2,339 Total ending allowance balance $ 5,428 $ 6,753 $ 1,653 $ 2,215 $ 93 $ 188 $ 16,330 Loans: Individually evaluated for impairment $ 775 $ 6,176 $ 0 $ 0 $ 0 $ 0 $ 6,951 Collectively evaluated for impairment 564,180 557,932 652,883 74,816 6,046 595 1,856,452 Acquired with deteriorated credit quality 205 1,527 0 0 0 0 1,732 Modified in a troubled debt restructuring 2,640 9,191 0 0 0 0 11,831 Total ending loans balance $ 567,800 $ 574,826 $ 652,883 $ 74,816 $ 6,046 $ 595 $ 1,876,966 The following tables present information related to loans individually evaluated for impairment, including loans modified in troubled debt restructurings, by portfolio segment as of December 31, 2017 and 2016 and for the years ended December 31, 2017, 2016, and 2015: December 31, 2017 Unpaid Balance Recorded Investment Allowance Losses With an allowance recorded: Commercial, industrial, and agricultural $ 1,915 $ 1,915 $ 292 Commercial mortgage 9,940 9,731 5,444 Residential real estate 0 0 0 With no related allowance recorded: Commercial, industrial, and agricultural 5,264 4,485 0 Commercial mortgage 3,211 2,410 0 Residential real estate 0 0 0 Total $ 20,330 $ 18,541 $ 5,736 December 31, 2016 Unpaid Balance Recorded Investment Allowance Losses With an allowance recorded: Commercial, industrial, and agricultural $ 1,644 $ 1,644 $ 313 Commercial mortgage 16,200 15,367 3,210 Residential real estate 0 0 0 With no related allowance recorded: Commercial, industrial, and agricultural 2,669 1,771 0 Commercial mortgage 0 0 0 Residential real estate 0 0 0 Total $ 20,513 $ 18,782 $ 3,523 The unpaid principal balance of impaired loans includes the Corporation’s recorded investment in the loan and amounts that have been charged off. Year Ended December 31, 2017 Average Interest Cash Basis With an allowance recorded: Commercial, industrial, and agricultural $ 1,513 $ 97 $ 97 Commercial mortgage 11,944 327 327 Residential real estate 0 0 0 With no related allowance recorded: Commercial, industrial, and agricultural 2,438 114 114 Commercial mortgage 2,474 122 122 Residential real estate 0 0 0 Total $ 18,369 $ 660 $ 660 Year Ended December 31, 2016 Average Interest Cash Basis With an allowance recorded: Commercial, industrial, and agricultural $ 2,616 $ 2 $ 2 Commercial mortgage 8,138 0 0 Residential real estate 50 6 6 With no related allowance recorded: Commercial, industrial, and agricultural 2,290 0 0 Commercial mortgage 2,773 0 0 Residential real estate 0 0 0 Total $ 15,867 $ 8 $ 8 Year Ended December 31, 2015 Average Interest Cash Basis With an allowance recorded: Commercial, industrial, and agricultural $ 5,667 $ 44 $ 44 Commercial mortgage 8,154 0 0 Residential real estate 370 21 21 With no related allowance recorded: Commercial, industrial, and agricultural 1,831 14 14 Commercial mortgage 4,806 0 0 Residential real estate 103 6 6 Total $ 20,931 $ 85 $ 85 The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of December 31, 2017 and 2016: December 31, 2017 December 31, 2016 Nonaccrual Past Due Over 90 Days Still on Accrual Nonaccrual Past Due Over 90 Days Still on Accrual Commercial, industrial, and agricultural $ 1,869 $ 78 $ 2,734 $ 0 Commercial mortgages 11,065 0 5,996 0 Residential real estate 5,470 338 5,600 0 Consumer 828 17 999 0 Credit cards 0 44 0 10 Total $ 19,232 $ 477 $ 15,329 $ 10 Nonaccrual loans and loans past due over 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. The following table presents the aging of the recorded investment in past due loans as of December 31, 2017 and 2016 by class of loans. December 31, 2017 30-59 Days 60-89 Days Greater Than Total Loans Not Total Commercial, industrial, and agricultural $ 2,745 $ 646 $ 748 $ 4,139 $ 744,999 $ 749,138 Commercial mortgages 233 0 292 525 599,540 600,065 Residential real estate 2,290 1,494 4,655 8,439 704,908 713,347 Consumer 454 307 812 1,573 78,620 80,193 Credit cards 31 10 44 85 6,668 6,753 Overdrafts 0 0 0 0 352 352 Total $ 5,753 $ 2,457 $ 6,551 $ 14,761 $ 2,135,087 $ 2,149,848 December 31, 2016 30-59 Days 60-89 Days Greater Than Total Loans Not Total Commercial, industrial, and agricultural $ 1,558 $ 299 $ 1,294 $ 3,151 $ 564,649 $ 567,800 Commercial mortgages 559 0 1,516 2,075 572,751 574,826 Residential real estate 2,155 737 3,710 6,602 646,281 652,883 Consumer 648 890 974 2,512 72,304 74,816 Credit cards 105 0 10 115 5,931 6,046 Overdrafts 0 0 0 0 595 595 Total $ 5,025 $ 1,926 $ 7,504 $ 14,455 $ 1,862,511 $ 1,876,966 Troubled Debt Restructurings During the years ended December 31, 2017 and 2016, the terms of certain loans were modified as troubled debt restructurings. The modification of the terms of such loans included either or both of the following: a reduction of the stated interest rate of the loan; or an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk. The following table presents the number of loans, loan balances, and specific reserves for loans that have been restructured in a troubled debt restructuring as of December 31, 2017 and December 31, 2016. December 31, 2017 December 31, 2016 Number of Loans Loan Balance Specific Reserve Number of Loans Loan Balance Specific Reserve Commercial, industrial, and agricultural 10 $ 5,213 $ 245 7 $ 2,640 $ 125 Commercial mortgages 9 12,090 5,444 8 9,191 2,214 Residential real estate 0 0 0 0 0 0 Consumer 0 0 0 0 0 0 Credit cards 0 0 0 0 0 0 Total 19 $ 17,303 $ 5,689 15 $ 11,831 $ 2,339 The following table presents loans by class modified as troubled debt restructurings that occurred during the years ended December 31, 2017, 2016, and 2015: Year Ended December 31, 2017 Number of Loans Pre-Modification Post-Modification Commercial, industrial, and agricultural 4 $ 2,750 $ 2,750 Commercial mortgages 2 6,421 6,421 Residential real estate 0 0 0 Consumer 0 0 0 Credit cards 0 0 0 Total 6 $ 9,171 $ 9,171 Year Ended December 31, 2016 Number of Loans Pre-Modification Post-Modification Commercial, industrial, and agricultural 1 $ 109 $ 109 Commercial mortgages 0 0 0 Residential real estate 0 0 0 Consumer 0 0 0 Credit cards 0 0 0 Total 1 $ 109 $ 109 Year Ended December 31, 2015 Number of Loans Pre-Modification Post-Modification Commercial, industrial, and agricultural 1 $ 1,327 $ 1,327 Commercial mortgages 0 0 0 Residential real estate 0 0 0 Consumer 0 0 0 Credit cards 0 0 0 Total 1 $ 1,327 $ 1,327 The troubled debt restructurings described above increased the allowance for loan losses by $4,024, $0 and $0 during the years ended December 31, 2017, 2016, and 2015, respectively. Modifications involving a reduction of the stated interest rate of the loan were for periods ranging from 4-15 years. Modifications involving an extension of the maturity date were for periods ranging from 4-18 A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. Except as discussed below, all loans modified in troubled debt restructurings are performing in accordance with their modified terms as of December 31, 2017 and 2016 and no principal balances were forgiven in connection with the loan restructurings. During the year ended December 31, 2017 four impaired commercial industrial loans totaling $2,750 were modified in troubled debt restructurings. The Corporation recorded an additional provision for loan losses of $129 and there were no chargeoffs for these loans during the year ended December 31, 2017. During the year ended December 31, 2017 two impaired commercial real estate loans totaling $6,421 were modified in troubled debt restructurings. The Corporation recorded an additional provision for loan losses of $3,895 and there were no chargeoffs for these loans during the year ended December 31, 2017. During the year ended December 31, 2016 one impaired commercial industrial loan having a balance of $109 was modified in troubled debt restructurings. The Corporation did not record any additional provision for loan losses and there were no chargeoffs for this loan during the year ended December 31, 2016. During the year ended December 31, 2015 one impaired commercial industrial loan having a balance of $1,327 was modified in troubled debt restructurings. The Corporation did not record any additional provision for loan losses and there were no chargeoffs for this loan during the year ended December 31, 2015. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without a loan modification. This evaluation is performed using the Corporation’s internal underwriting policies. The Corporation has no further loan commitments to customers whose loans are classified as a troubled debt restructuring. Generally, nonperforming troubled debt restructurings are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Credit Quality Indicators The Corporation classifies commercial, industrial, and agricultural loans and commercial mortgage loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. Loans with outstanding balances greater than $1 million are analyzed at least semiannually and loans with outstanding balances of less than $1 million are analyzed at least annually. The Corporation uses the following definitions for risk ratings: Special Mention: Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the Corporation’s credit position at some future date. Substandard: Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Corporation will sustain some loss if the deficiencies are not corrected. Doubtful: Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans not rated as special mention, substandard, or doubtful are considered to be pass rated loans. All loans included in the following tables have been assigned a risk rating within 12 months of the balance sheet date. December 31, 2017 Pass Special Substandard Doubtful Total Commercial, industrial, and agricultural $ 713,102 $ 16,726 $ 19,310 $ 0 $ 749,138 Commercial mortgages 581,631 4,419 14,015 0 600,065 Total $ 1,294,733 $ 21,145 $ 33,325 $ 0 $ 1,349,203 December 31, 2016 Pass Special Substandard Doubtful Total Commercial, industrial, and agricultural $ 531,320 $ 14,638 $ 21,831 $ 11 $ 567,800 Commercial mortgages 551,474 1,809 21,543 0 574,826 Total $ 1,082,794 $ 16,447 $ 43,374 $ 11 $ 1,142,626 The Corporation considers the performance of the loan portfolio and its impact on the allowance for loan losses. For residential real estate, consumer, and credit card loan classes, the Corporation also evaluates credit quality based on the performance status of the loan, which was previously presented, and by payment activity. Nonperforming loans include loans on nonaccrual status and loans past due over 90 days and still accruing interest. The following table presents the recorded investment in residential, consumer, and credit card loans based on performance status as of December 31, 2017 and December 31, 2016: December 31, 2017 December 31, 2016 Residential Consumer Credit Residential Consumer Credit Performing $ 707,539 $ 79,348 $ 6,709 $ 647,283 $ 73,817 $ 6,036 Nonperforming 5,808 845 44 5,600 999 10 Total $ 713,347 $ 80,193 $ 6,753 $ 652,883 $ 74,816 $ 6,046 The Corporation’s portfolio of residential real estate and consumer loans maintained within Holiday Financial Services Corporation (“Holiday”), a subsidiary that offers small balance unsecured and secured loans, primarily collateralized by automobiles and equipment, to borrowers with higher risk characteristics than are typical in the Bank’s consumer loan portfolio, are considered to be subprime loans. Holiday’s loan portfolio, included in consumer and residential loans above, is summarized as follows at December 31, 2017 and 2016: 2017 2016 Consumer $ 23,428 $ 24,026 Residential real estate 0 1,209 Less: unearned discount (3,889 ) (3,430 ) Total $ 19,539 $ 21,805

Secondary Market Mortgage Activ

Secondary Market Mortgage Activities	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Secondary Market Mortgage Activities	6. Secondary Market Mortgage Activities The following summarizes secondary market mortgage activities for the years ended December 31, 2017, 2016 and 2015: 2017 2016 2015 Loans originated for resale $ 25,231 $ 31,255 $ 15,171 Proceeds from sales of loans held for sale 24,285 33,045 14,927 Net gains on sales of loans held for sale 545 818 630 Loan servicing fees 563 421 390 Total loans serviced for others were $159,208 and $157,073 December 31, 2017 and 2016, respectively. The following summarizes activity for capitalized mortgage servicing rights for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Balance, beginning of year $ 1,391 $ 962 $ 856 Additions 198 200 380 Servicing rights acquired 0 367 0 Amortization (202 ) (138 ) (274 ) Balance, end of year $ 1,387 $ 1,391 $ 962 The fair value of mortgage servicing rights is based on market prices for comparable mortgage servicing contracts, when available, or alternatively based on a valuation model that calculates the present value of estimated future net servicing income. The fair value of mortgage servicing rights was not materially different than amortized cost at December 31, 2017 and 2016, respectively. No valuation allowance is deemed necessary at December 31, 2017, 2016, or 2015. The fair value of interest rate lock commitments and forward commitments to sell loans was not material at December 31, 2017 or 2016.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Premises and Equipment	7. Premises and Equipment The following summarizes premises and equipment at December 31, 2017 and 2016: 2017 2016 Land $ 8,147 $ 7,324 Premises and leasehold improvements 53,903 48,563 Furniture and equipment 31,238 30,125 Construction in process 71 4,014 93,359 90,026 Less: accumulated depreciation 42,644 40,504 Premises and equipment, net $ 50,715 $ 49,522 Depreciation on premises and equipment amounted to $3,811 in 2017, $3,215 in 2016 and $2,759 in 2015. The Corporation is committed under nineteen non-cancelable operating leases for facilities and eleven non-cancelable operating leases for vehicles with initial or remaining terms in excess of one year. The minimum annual rental commitments under these leases at December 31, 2017 are as follows: 2018 $ 1,167 2019 1,021 2020 836 2021 736 2022 578 Thereafter 3,530 $ 7,868 Rental expense, net of rental income, charged to occupancy expense for 2017, 2016, and 2015 was $870, $773 and $699, respectively. In December 2009, the Corporation entered into a sale-leaseback transaction for real estate used in the operations of one of its branch office locations. The lease term is seventeen years, with two automatic renewal terms of five years each. The Corporation sold the property for $1,200 but financed the entire sales amount. Because the buyer/lessor did not make an initial investment on the purchase of the real estate that is adequate to transfer the risks and rewards of ownership, the Corporation deferred the entire gain of $489 associated with this transaction, which is included in accrued interest payable and other liabilities in the accompanying consolidated balance sheet. The gain is being recognized over the term of the loan under the installment method, and the gain recognized was included in other income in the accompanying consolidated statements of income and comprehensive income and totaled $25, $25 and $22 in 2017, 2016, and 2015, respectively. The minimum annual rental commitments under this sale-leaseback transaction at December 31, 2017 are as follows: 2018 $ 105 2019 105 2020 105 2021 105 2022 105 Thereafter 420 $ 945

Foreclosed Assets

Foreclosed Assets	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Foreclosed Assets	8. Foreclosed Assets Foreclosed real estate is reported net of a valuation allowance and included in accrued interest receivable and other assets in the accompanying consolidated balance sheets. Activity for the years ended December 31, 2017, 2016, and 2015 is as follows: 2017 2016 2015 Balance, beginning of year $ 1,015 $ 654 $ 806 Acquired from Lake National Bank 0 665 0 Additions 630 120 806 Sales (at carrying value) (935 ) (424 ) (958 ) Balance, end of year $ 710 $ 1,015 $ 654 Expenses related to foreclosed real estate include: 2017 2016 2015 Net (gain) loss on sale $ (208 ) $ (134 ) $ 3 Operating expenses, net of rental income 366 223 169 $ 158 $ 89 $ 172

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	9. Goodwill and Intangible Assets Goodwill The change in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 is as follows: 2017 2016 Balance, beginning of year $ 38,730 $ 27,194 Acquired during the year 0 11,536 Balance, end of year $ 38,730 $ 38,730 Impairment exists when a reporting unit’s carrying value of goodwill exceeds its fair value, which is determined through a two-step impairment test. Step 1 includes the determination of the carrying value of our single reporting unit, including the existing goodwill and intangible assets, and estimating the fair value of the reporting unit. We determined the fair value of our reporting unit exceeded its carrying amount. If the carrying amount of the reporting unit exceeds its fair value, we are required to perform a second step to the impairment test. Our annual impairment analysis at December 31, 2017 and 2016 indicated that the Step 2 analysis was not necessary. Intangible Assets In connection with its acquisition of FC Banc Corp. in 2013, the Corporation recorded a core deposit intangible asset of $4,834. During the years ended December 31, 2017, 2016, and 2015, the Corporation recorded amortization expense of $662, $835 and $1,008, respectively. The net carrying values at December 31, 2017 and December 31, 2016 were $899 and $ 1,561, respectively. No other intangible assets were required to be recorded in connection with the acquisition of FC Banc Corp. In connection with its acquisition of Lake National Bank in 2016, the Corporation recorded a core deposit intangible asset of $1,583. During the year ended December 31, 2017 and 2016, the Corporation recorded amortization expense of $567 and $290, respectively. The net carrying values at December 31, 2017 and 2016 were $726 and $1,293, respectively. No other intangible assets were required to be recorded in connection with the acquisition of Lake National Bank. Estimated amortization expense of core deposit intangible assets for each of the next five years is as follows: 2018 $ 898 2019 567 2020 160 2021 0 2022 0

Deposits

Deposits	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Deposits	10. Deposits The following table reflects time certificates of deposit accounts included in total deposits and their remaining maturities at December 31, 2017: Time deposits maturing: 2018 $ 125,809 2019 128,602 2020 91,799 2021 7,954 2022 6,881 Thereafter 3,926 $ 364,971 Certificates of deposit of $250 thousand or more totaled $108,992 and $25,650 at December 31, 2017 and 2016, respectively. The Corporation had $3,500 and $0 in brokered deposits at December 31, 2017 and 2016.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Borrowings	11. Borrowings At December 31, 2017 and 2016, the Corporation had available one $10 million unsecured line of credit with an unaffiliated institution, at a variable interest rate with a floor as defined in the agreement. There were no borrowings on the line of credit at December 31, 2017 and 2016. FHLB Borrowings At December 31, 2017, the Bank had remaining borrowing capacity with the FHLB of $532,809. At December 31, 2017, borrowings with the FHLB are secured by a pledge of selected securities in the amount of $8,068 and certain loans with a balance of $1,085,644. Borrowings from the FHLB at December 31, 2017 and 2016 are as follows: Interest Maturity 2017 2016 (a) n/a $ 34,416 $ 103,969 (b) 09/06/17 0 15,016 (c) 12/15/17 0 15,093 (d) 09/06/18 7,550 17,523 (e) 06/28/19 30,000 0 (f) 09/06/19 11,752 18,360 (g) 09/16/19 8,883 13,865 (h) 06/29/20 30,000 0 (i) 09/08/20 13,859 18,780 (j) 06/28/21 30,000 0 (k) 06/29/22 50,000 0 (l) 09/06/22 15,976 19,201 (m) 12/05/22 20,000 0 (n) 07/03/23 700 700 (o) 09/05/23 1,797 1,925 (p) 03/11/24 814 852 (q) 06/11/24 435 462 (r) 05/04/26 217 240 (s) 10/14/26 231 252 (t) 02/11/33 729 766 $ 257,359 $ 227,004 (a) – Open Repo borrowing at an interest rate of 1.54% at December 31, 2017 and 0.74% at December 31, 2016. The maximum amount of the Open Repo borrowing available is $150,000. (b) – Fixed rate borrowing at an interest rate of 0.83%, with monthly principal and interest payments. (c) – Fixed rate borrowing at an interest rate of 1.25%, with monthly principal and interest payments. (d) – Fixed rate borrowing at an interest rate of 1.05%, with monthly principal and interest payments. (e) – Fixed rate borrowing at interest rate of 1.66%. Interest only payments with principal due at maturity. (f) – Fixed rate borrowing at an interest rate of 1.17%, with monthly principal and interest payments. (g) – Fixed rate borrowing at an interest rate of 1.35%, with monthly principal and interest payments. (h) – Fixed rate borrowing at interest rate of 1.82%. Interest only payments with principal due at maturity. (i) – Fixed rate borrowing at an interest rate of 1.27%, with monthly principal and interest payments. (j) – Fixed rate borrowing at interest rate of 1.97%. Interest only payments with principal due at maturity. (k) – Fixed rate borrowing at interest rate of 1.97%. Interest only payments with principal due at maturity. (l) – Fixed rate borrowing at an interest rate of 1.47%, with monthly principal and interest payments. (m) – Fixed rate borrowing at interest rate of 2.39%. Interest only payments with principal due at maturity. (n) – Fixed rate borrowing at interest rate of 4.72%. Interest only payments with principal due at maturity. (o) – Fixed rate borrowing at an interest rate of 4.31%, with monthly principal and interest payments and a balloon payment due at maturity. (p) – Fixed rate borrowing at an interest rate of 3.05%, with monthly principal and interest payments and a balloon payment due at maturity. (q) – Fixed rate borrowing at an interest rate of 5.24%, with monthly principal and interest payments and a balloon payment due at maturity. (r) – Fixed rate borrowing at an interest rate of 3.35%, with monthly principal and interest payments. (s) – Fixed rate borrowing at an interest rate of 4.00%, with monthly principal and interest payments. (t) – Fixed rate borrowing at an interest rate of 2.96%, with monthly principal and interest payments. Each advance is payable at its maturity date, with a prepayment penalty for fixed rate advances. Other Borrowings At December 31, 2017 and 2016, the Bank had no outstanding borrowings from unaffiliated institutions under overnight borrowing agreements. The Bank entered into a borrowing transaction with an unaffiliated institution in March 2007. The proceeds of this borrowing were $10,000 and, as part of this transaction, the Bank pledged certain securities which had a carrying amount of $11,416 at December 31, 2016. The borrowing matured March 20, 2017. The interest rate was fixed and was 5.25% at December 31, 2016. Subordinated Debentures In 2007, the Corporation issued two $10,000 floating rate trust preferred securities as part of a pooled offering of such securities. The interest rate on each offering is determined quarterly and floats based on the 3 month LIBOR plus 1.55% and was 3.14% at December 31, 2017 and 2.51% at December 31, 2016. The Corporation issued subordinated debentures to the trusts in exchange for the proceeds of the offerings, which debentures represent the sole assets of the trusts. The subordinated debentures must be redeemed no later than 2037. The Corporation may redeem the debentures, in whole or in part, at face value at any time. The Corporation has the option to defer interest payments from time to time for a period not to exceed five consecutive years. Although the trusts are variable interest entities, the Corporation is not the primary beneficiary. As a result, because the trusts are not consolidated with the Corporation, the Corporation does not report the securities issued by the trusts as liabilities. Instead, the Corporation reports as liabilities the subordinated debentures issued by the Corporation and held by the trusts, since the liabilities are not eliminated in consolidation. In September 2016, the Corporation completed a private placement of $50,000 in aggregate principal amount of fixed-to-floating rate subordinated notes. The notes will mature in October 2026, and will initially bear interest at a fixed rate of 5.75% per annum, payable semi-annually in arrears, to, but excluding, October 15, 2021, and thereafter to, but excluding, the maturity date or earlier redemption, the interest rate shall reset quarterly to an interest rate per annum equal to the then current three-month LIBOR rate plus 4.55%. These subordinated notes were designed to qualify as Tier 2 capital under the Federal Reserve’s capital guidelines and were given an investment grade rating of BBB- by Kroll Bond Rating Agency. Maturity Schedule of All Borrowed Funds The following is a schedule of maturities of all borrowed funds as of December 31, 2017: 2018 $ 62,242 2019 47,562 2020 37,505 2021 33,740 2022 72,931 Thereafter 73,999 Total borrowed funds $ 327,979

Interest Rate Swaps

Interest Rate Swaps	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Swaps	12. Interest Rate Swaps On May 3, 2011, the Corporation executed an interest rate swap agreement with a 5 year term and an effective date of September 15, 2013 in order to hedge cash flows associated with $10 million of a subordinated note that was issued by the Corporation during 2007 and elected cash flow hedge accounting for the agreement. The Corporation’s objective in using this derivative is to add stability to interest expense and to manage its exposure to interest rate risk. The interest rate swap involves the receipt of variable-rate amounts in exchange for fixed-rate payments from September 15, 2013 to September 15, 2018 without exchange of the underlying notional amount. At December 31, 2017, the variable rate on the subordinated debt was 3.14% (LIBOR plus 155 basis points) and the Corporation was paying 5.57% (4.02% fixed rate plus 155 basis points). As of December 31, 2017 and 2016, no derivatives were designated as fair value hedges or hedges of net investments in foreign operations. Additionally, the Corporation does not use derivatives for trading or speculative purposes and currently does not have any derivatives that are not designated as hedges. The following tables provide information about the amounts and locations of activity related to the interest rate swaps designated as cash flow hedges within the Corporation’s consolidated balance sheet and statement of income as of December 31, 2017 and 2016 and for the years ended December 31, 2017, 2016, and 2015: As of December 31 Liability Derivative Balance Sheet Fair value Location 2017 2016 Interest rate contract Accrued interest payable and other liabilities ($161) ($459) For the Year Ended December 31, 2017 (a) (b) (c) (d) (e) Interest rate contract $194 Interest expense – subordinated debentures ($288) Other $0 For the Year Ended December 31, 2016 Interest rate contract $180 Interest expense – subordinated debentures ($340) Other $0 For the Year Ended December 31, 2015 Interest rate contract $137 Interest expense – subordinated debentures ($378) Other $0 (a) Amount of Gain Recognized in Other Comprehensive Loss on Derivative (Effective Portion), net of tax (b) Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion) (c) Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion) (d) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) (e) Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amounts reported in accumulated other comprehensive loss related to the interest rate swap will be reclassified to interest expense as interest payments are made on the subordinated debentures. Such amounts reclassified from accumulated other comprehensive loss to interest expense in the next twelve months are expected to be $270. As of December 31, 2017 and 2016, a cash collateral balance of $1,400 was maintained with the counterparty to the interest rate swaps. These balances are included in interest bearing deposits with other banks on the consolidated balance sheets. During 2016, the Corporation entered into certain interest rate swap contracts that are not designated as hedging instruments. These derivative contracts relate to transactions in which the Corporation enters into an interest rate swap with a customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each swap transaction, the Corporation agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. Concurrently, the Corporation agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows the Corporation’s customers to effectively convert a variable rate loan to a fixed rate. Because the Corporation acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts offset each other and do not impact the Corporation’s results of operations. The following table provides information about the amounts and locations of activity related to the back-to-back interest rate swaps within the Corporation’s consolidated balance sheet as of December 31, 2017 and 2016: Notional Average Weighted Weighted Average Variable Rate Fair December 31, 2017 3 rd Party interest rate swaps $ 11,848 8.0 4.51 % 1 month LIBOR + 2.37% $ 149 (a) Customer interest rate swaps (11,848 ) 8.0 4.51 % 1 month LIBOR + 2.37% (149) (b) December 31, 2016 3 rd Party interest rate swaps $ 14,814 9.7 4.43 % 1 month LIBOR + 2.35% $ 211 (a) Customer interest rate swaps (14,814 ) 9.7 4.43 % 1 month LIBOR + 2.35% (211) (b) (a) Reported in accrued interest receivable and other assets within the consolidated balance sheets (b) Reported in accrued interest payable and other liabilities within the consolidated balance sheets

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes The following is a summary of income tax expense for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Current – federal $ 8,978 $ 6,181 $ 7,777 Current – state 29 (33 ) 139 Deferred – federal 376 1,023 376 Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate 3,009 0 0 Income tax expense $ 12,392 $ 7,171 $ 8,292 The reconciliation of income tax attributable to pre-tax income at the federal statutory tax rates to income tax expense is as follows: 2017 % 2016 % 2015 % Tax at statutory rate $ 12,688 35.0 $ 9,699 35.0 $ 10,671 35.0 Tax exempt income, net (1,899 ) (5.2 ) (2,054 ) (7.4 ) (1,816 ) (6.0 ) Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate 3,009 8.3 0 0.00 0 0.0 Bank owned life insurance (581 ) (1.6 ) (379 ) (1.3 ) (418 ) (1.4 ) Merger costs 0 0.0 170 0.6 30 0.1 Other (825 ) (2.3 ) (265 ) (1.0 ) (175 ) (0.5 ) Income tax expense $ 12,392 34.2 $ 7,171 25.9 $ 8,292 27.2 Income tax expense for 2017 was impacted by the adjustment of our deferred tax assets and liabilities related to the reduction in the U.S. federal statutory income tax rate to 21% under the Tax Cuts and Jobs Act, which was enacted on December 22, 2017. As a result of the new law, which is more fully discussed below, the Corporation recognized additional tax expense totaling $3,009, as detailed in the table above. Year-end deferred taxes are presented in the table below. As a result of the Tax Cuts and Jobs Act enacted on December 22, 2017 (discussed below), deferred taxes as of December 31, 2017 are based on the newly enacted U.S. statutory federal income tax rate of 21%. Deferred taxes as of December 31, 2016 are based on the previously enacted U.S. statutory federal income tax rate of 35%. 2017 2016 Deferred tax assets: Allowance for loan losses $ 2,840 $ 4,679 Fair value adjustments – business combination 1,135 2,530 Deferred compensation 1,903 2,891 Impaired security valuation 0 379 Net operating loss carryover 71 627 Post-retirement benefits 892 1,688 Unrealized loss on interest rate swap 34 161 Nonaccrual loan interest 390 649 Accrued expenses 699 1,282 Deferred fees and costs 598 629 Other 344 465 8,906 15,980 Deferred tax liabilities: Unrealized gain on securities available for sale 126 750 Premises and equipment 1,413 2,258 Unrealized gain on trading securities 156 118 Intangibles – section 197 2,593 4,735 Mortgage servicing rights 291 487 Other 78 23 4,657 8,371 Net deferred tax asset $ 4,249 $ 7,609 At December 31, 2017 and 2016, the Corporation has no unrecognized tax benefits. The Corporation does not expect the total amount of unrecognized tax benefits to significantly increase in the next twelve months. The Corporation recognizes interest and/or penalties related to income tax matters as part of income tax expense. At December 31, 2017 and 2016, there were no amounts accrued for interest and/or penalties and no amounts recorded as expense for the years ending December 31, 2017, 2016, and 2015. The Corporation and its subsidiaries are subject to U.S. federal income tax. The Corporation is no longer subject to examination by the taxing authorities for years prior to 2013. Tax years 2014 through 2016 remain open to federal examination. In connection with its acquisition of FC Banc Corp., the Corporation assumed a federal net operating loss carryforward of $6,367, which expires in 2033. Under Section 382 of the Internal Revenue Code, the utilization of the loss carryforward in future years is limited based on the consideration paid and other factors. The annual limitation on the utilization of this loss carry forward is $1,455. As of December 31, 2017, the balance of the net operating loss carryforward is $338. Management believes that the net operating loss carryforward will be used in full before its expiration. The Tax Cuts and Jobs Act was enacted on December 22, 2017. Among other things, the new law (i) establishes a new, flat corporate federal statutory income tax rate of 21%, (ii) eliminates the corporate alternative minimum tax and allows the use of any such carryforwards to offset regular tax liability for any taxable year, (iii) limits the deduction for net interest expense incurred by U.S. corporations, (iv) allows businesses to immediately expense, for tax purposes, the cost of new investments in certain qualified depreciable assets, (v) eliminates or reduces certain deductions related to meals and entertainment expenses, (vi) modifies the limitation on excessive employee remuneration to eliminate the exception for performance-based compensation and clarifies the definition of a covered employee and (vii) limits the deductibility of deposit insurance premiums. The Tax Cuts and Jobs Act also significantly changes U.S. tax law related to foreign operations, however, such changes do not currently impact us.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Benefit Plans	14. Employee Benefit Plans The Corporation sponsors a contributory defined contribution Section 401(k) plan in which substantially all employees participate. The plan permits employees to make pre-tax contributions which are matched by the Corporation at 100% for every 1% contributed up to 3% then 50% for every 1% contributed up to the next 2% in total of the employee’s compensation. The Corporation’s matching contribution and related expenses were $802, $652 and $508 in 2017, 2016, and 2015, respectively. Profit sharing contributions to this plan, based on current year compensation, are 6.0% of total compensation plus 5.7% of the compensation in excess of $127. The Corporation recognized profit sharing expense of $1,755, $1,276 and $868 in 2017, 2016, and 2015 respectively. The Corporation has adopted a non-qualified supplemental executive retirement plan (“SERP”) for certain executives to compensate those executive participants in the Corporation’s retirement plan whose benefits are limited by compensation limitations under current tax law. The SERP is considered an unfunded plan for tax and ERISA purposes and all obligations arising under the SERP are payable from the general assets of the Corporation. At December 31, 2017 and 2016, obligations of $5,349 and $4,958, respectively, were included in other liabilities for this plan. Expenses related to this plan were $648 in 2017, $550 in 2016 and $608 in 2015. The Corporation has established a Survivor Benefit Plan for the benefit of outside directors. The purpose of the plan is to provide life insurance benefits to beneficiaries of the Corporation’s directors who at the time of their death are participants in the plan. The plan is considered an unfunded plan for tax and ERISA purposes and all obligations arising under the plan are payable from the general assets of the Corporation. At December 31, 2017 and 2016, obligations of $1,264 and $1,175, respectively, were included in other liabilities for this plan. Expenses related to this plan were $89 in 2017, $33 in 2016 and $155 in 2015. The Corporation has an unfunded post retirement benefits plan which provides certain health care benefits for retired employees who have reached the age of 60 and retired with 30 years of service. The plan was amended in 2013 to include only employees hired prior to January 1, 2000. Benefits are provided for these retired employees and their qualifying dependents from the age of 60 through the age of 65. The following table sets forth the change in the benefit obligation of the plan as of and for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Benefit obligation at beginning of year $ 3,409 $ 3,066 $ 2,744 Interest cost 114 108 90 Service cost 103 103 96 Actual claims (78 ) (151 ) (109 ) Actuarial (gain) loss (808 ) 283 245 Benefit obligation at end of year $ 2,740 $ 3,409 $ 3,066 Amounts recognized in accumulated other comprehensive income at December 31, 2017 and 2016 consist of: 2017 2016 Net actuarial loss $ (871 ) $ (1,871 ) Tax effect 183 654 $ (688 ) $ (1,217 ) The accumulated benefit obligation was $2,740 and $3,409 at December 31, 2017 and 2016, respectively. The following table sets forth the components of net periodic benefit cost and other amounts recognized in other comprehensive income: 2017 2016 2015 Service cost $ 103 $ 103 $ 96 Interest cost 114 108 90 Net amortization of transition obligation and actuarial loss 192 184 173 Net periodic benefit cost 409 395 359 Net (gain) loss (808 ) 282 311 Amortization of loss (192 ) (184 ) (173 ) Total recognized in other comprehensive income (1,000 ) 98 138 Total recognized in net periodic benefit cost and other comprehensive income $ (591 ) $ 493 $ 497 The estimated net loss that will be amortized from accumulated other comprehensive income into net periodic benefit cost over the next fiscal year is $84. The weighted average discount rate used to calculate net periodic benefit cost was 3.49% in 2017, 3.67% in 2016, and 3.42% in 2015. The weighted average rate used to calculate accrued benefit obligations was 3.13% in 2017, 3.49% in 2016, and 3.67% in 2015. The health care cost trend rate used to measure the expected costs of benefits is 5.0% for 2018 and thereafter. A one percent increase in the health care trend rates would result in an increase of $267 in the benefit obligation as of December 31, 2017, and would increase the service and interest costs by $19 in future periods. A similar one percent decrease in health care trend rates would result in a decrease of $218 and $15 in the benefit obligation and services and interest costs, respectively, at December 31, 2017.

Deferred Compensation Plans

Deferred Compensation Plans	12 Months Ended
	Dec. 31, 2017
Postemployment Benefits [Abstract]
Deferred Compensation Plans	15. Deferred Compensation Plans Deferred compensation plans cover all directors and certain officers. Under the plans, the Corporation pays each participant, or their beneficiary, the value of the participant’s account over a maximum period of 10 years, beginning with the individual’s termination of service. A liability is accrued for the obligation under these plans. A summary of changes in the deferred compensation plan liability follows: 2017 2016 2015 Balance, beginning of year $ 2,080 $ 1,226 $ 1,087 Deferrals, dividends, and changes in fair value recorded as an expense 444 936 209 Deferred compensation payments (21 ) (82 ) (70 ) Balance, end of year $ 2,503 $ 2,080 $ 1,226

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	16. Stock-Based Compensation A summary of changes in nonvested restricted stock awards follows: Shares Weighted-average Fair Value Nonvested at January 1, 2017 100,726 $17.36 Granted 39,673 25.94 Forfeited (2,482 ) 21.12 Vested (43,445 ) 17.54 Nonvested at December 31, 2017 94,472 $20.79 As of December 31, 2017 and 2016, there was $1,243 and $1,190, respectively, of total unrecognized compensation cost related to nonvested shares granted under the restricted stock award plan. The fair value of shares vesting during 2017, 2016, and 2015 was $1,035, $624 and $530, respectively. Compensation expense for restricted stock awards was $928 in 2017, $820 in 2016 and $621 in 2015. The number of authorized stock-based awards still available for grant as of December 31, 2017 was 219,800. In addition to the time-based restricted stock disclosed above, the Corporation’s Board of Directors granted performance-based restricted stock awards (“PBRSAs”) with a maximum of 10,000 shares to an employee in 2017. The number of PBRSAs will depend on certain performance conditions and are also subject to service-based vesting.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	17. Related Party Transactions In the ordinary course of business, the Bank has transactions, including loans and credit cards, with its officers, directors, and their affiliated companies. The aggregate of such loans and credit cards totaled $5,331 on December 31, 2017 compared to $4,357 on December 31, 2016. During 2017, $1,816 in new loans were made, $25 were added for the net change in outstanding credit card balances, $200 were removed due to a change in the composition of related parties, and repayments totaled $667. Deposits from principal officers, directors, and their affiliates were $11,982 and $14,434 at December 31, 2017 and 2016, respectively.

Capital Requirements and Restri

Capital Requirements and Restrictions on Retained Earnings	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Capital Requirements and Restrictions on Retained Earnings	18. Capital Requirements and Restrictions on Retained Earnings Banks and financial holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, for the Bank, prompt corrective action (PCA) regulations involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can result in regulatory enforcement actions. Under the Basel III rules, the Corporation and Bank must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. The capital conservation buffer is being phased in from 0.0% for 2015 to 2.50% by 2019. The capital conservation buffer for 2017 is 1.25% and for 2016 is 0.625%. The net unrealized gain or loss on available for sale securities are excluded from computing regulatory capital. Management believes as of December 31, 2017 the Corporation and Bank meet all capital adequacy requirements to which they are subject. The PCA regulations provide five capital categories: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms alone do not represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion; brokered deposits may not be accepted, renewed or rolled over; and capital restoration plans are required. As of December 31, 2017 and 2016, the most recent regulatory notifications categorized the Bank as well capitalized under the PCA regulatory framework. There are no events or conditions since this notification that management believes have changed the Bank’s capital category. Actual and required capital amounts and ratios are presented below as of December 31, 2017 and 2016. The capital adequacy ratio includes the capital conservation buffer. Actual For Capital To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio December 31, 2017 Total Capital to Risk Weighted Assets Consolidated $297,708 14.32 % $192,341 9.25% N/A Bank $279,704 13.58 % $190,513 9.25% $205,960 10.00% Tier 1 (Core) Capital to Risk Weighted Assets Consolidated $228,015 10.97 % $150,754 7.25% N/A Bank $261,643 12.70 % $149,321 7.25% $164,768 8.00% Common equity Tier 1 to Risk Weighted Assets Consolidated $208,015 10.00 % $119,563 5.75% N/A Bank $254,264 12.35 % $118,427 5.75% $133,874 6.50% Tier 1 (Core) Capital to Average Assets Consolidated $228,015 8.45 % $107,969 4.00% N/A Bank $261,643 9.80 % $106,798 4.00% $133,498 5.00% December 31, 2016 Total Capital to Risk Weighted Assets Consolidated $261,530 14.05 % $160,501 8.625% N/A Bank $242,592 13.19 % $158,590 8.625% $183,873 10.00% Tier 1 (Core) Capital to Risk Weighted Assets Consolidated $195,200 10.49 % $123,283 6.625% N/A Bank $228,109 12.41 % $121,816 6.625% $147,098 8.00% Common equity Tier 1 to Risk Weighted Assets Consolidated $175,200 9.41 % $95,370 5.125% N/A Bank $220,730 12.00 % $94,235 5.125% $119,517 6.50% Tier 1 (Core) Capital to Average Assets Consolidated $195,200 7.85 % $99,430 4.00% N/A Bank $228,109 9.36 % $97,527 4.00% $121,909 5.00% The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Company on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. The net unrealized gain or loss on available for sales securities is included in computing regulatory capital. Certain restrictions exist regarding the ability of the Bank to transfer funds to the Corporation in the form of cash dividends, loans or advances. During 2018, $30,615 of accumulated net earnings of the Bank included in consolidated stockholders’ equity, plus any 2018 net profits retained to the date of the dividend declared, is available for distribution to the Corporation as dividends without prior regulatory approval, subject to regulatory capital requirements described above.

Off Balance Sheet Activities

Off Balance Sheet Activities	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Off Balance Sheet Activities	19. Off-Balance Sheet Activities 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 December 31, 2017 and 2016: 2017 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $64,799 $210,987 $57,283 $202,883 Unused lines of credit 0 118,348 0 105,779 Standby letters of credit 0 14,985 0 4,618 Commitments to make loans are generally made for periods of 60 days or less. The fixed rate loan commitments at December 31, 2017 have interest rates ranging from 1.00% to 18.00% and maturities ranging from 8 months to 30 years. The fixed rate loan commitments at December 31, 2016 have interest rates ranging from 1.19% to 18.00% and maturities ranging from 6 months to 30 years. In October 2015, the Corporation entered into a subscription agreement with Oxer BCP Mezzanine Fund, LP (“Oxer”) and committed to invest $5,000 as a limited partner in the fund. In February 2017, the Corporation entered into a subscription agreement with Tecum Capital Partners II, LP (“Tecum”) and committed to invest $3,000 as a limited partner in the fund. Oxer and Tecum are both Small Business Investment Company (SBIC) that are licensed and regulated by the Office of Investment at the Small Business Administration (SBA). The SBIC license allows SBICs to employ private capital and funds borrowed at a low cost using SBA-guaranteed securities to make investments in qualifying small businesses and similar enterprises as defined by SBA regulations. As of December 31, 2017, the Bank has made $3,290 of capital contributions to Oxer and $1,167 of capital contributions to Tecum.

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value	20. Fair Value Fair Value Measurement Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value hierarchy has also been established which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The following three levels of inputs are used to measure fair value: Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. The fair values of most trading securities and securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The Corporation’s structured pooled trust preferred securities are priced using Level 3 inputs. The decline in the level of observable inputs and market activity in this class of investments by the measurement date has been significant and resulted in unreliable external pricing. Broker pricing and bid/ask spreads, when available, vary widely, and the once-active market has become comparatively inactive. The Corporation engaged a third party consultant who has developed a model for pricing these securities. Information such as historical and current performance of the underlying collateral, deferral and default rates, collateral coverage ratios, break in yield calculations, cash flow projections, liquidity and credit premiums required by a market participant, and financial trend analysis with respect to the individual issuing financial institutions and insurance companies are utilized in determining the security valuation. Due to the current market conditions as well as the limited trading activity of these types of securities, the market value of the Corporation’s structured pooled trust preferred securities are highly sensitive to assumption changes and market volatility. The Corporation’s derivative instruments are interest rate swaps that are similar to those that trade in liquid markets. As such, significant fair value inputs can generally be verified and do not typically involve significant management judgments (Level 2 inputs). The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on recent real estate appraisals prepared by third-parties. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Management also adjusts appraised values based on the length of time that has passed since the appraisal date and other factors. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Assets and liabilities measured at fair value on a recurring basis are as follows at December 31, 2017 and 2016: Fair Value Measurements at December 31, 2017 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Securities Available For Sale: U.S. Government sponsored entities $ 108,148 $ 0 $ 108,148 $ 0 States and political subdivisions 137,723 0 137,723 0 Residential and multi-family mortgage 109,636 0 109,636 0 Corporate notes and bonds 17,200 0 17,200 0 Pooled SBA 36,040 0 36,040 0 Other equity securities 962 962 0 0 Total Securities Available For Sale $ 409,709 $ 962 $ 408,747 $ 0 Interest Rate swaps: $ 149 $ 0 $ 149 $ 0 Trading Securities: Corporate equity securities $ 5,125 $ 5,125 $ 0 $ 0 Mutual funds 1,499 1,499 0 0 Certificates of deposit 220 220 0 0 Corporate notes and bonds 254 254 0 0 U.S. Government sponsored entities 52 0 52 0 Total Trading Securities $ 7,150 $ 7,098 $ 52 $ 0 Liabilities Interest rate swaps $ (310 ) $ 0 $ (310 ) $ 0 Fair Value Measurements at December 31, 2016 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Securities Available For Sale: U.S. Government sponsored entities $ 140,351 $ 0 $ 140,351 $ 0 States and political subdivisions 157,037 0 157,037 0 Residential and multi-family mortgage 134,976 0 134,976 0 Corporate notes and bonds 17,414 0 17,414 0 Pooled trust preferred 2,049 0 0 2,049 Pooled SBA 43,037 0 43,037 0 Other equity securities 971 971 0 0 Total Securities Available For Sale $ 495,835 $ 971 $ 492,815 $ 2,049 Interest Rate swaps: $ 211 $ 0 $ 211 $ 0 Trading Securities: Corporate equity securities $ 3,312 $ 3,312 $ 0 $ 0 Mutual funds 1,037 1,037 0 0 Certificates of deposit 202 202 0 0 Corporate notes and bonds 254 254 0 0 U.S. Government sponsored entities 53 0 53 0 Total Trading Securities $ 4,858 $ 4,805 $ 53 $ 0 Liabilities Interest rate swaps $ (670 ) $ 0 $ (670 ) $ 0 The table below presents a reconciliation and income statement classification of gains and losses for all securities available for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2017: Pooled Balance, January 1, 2017 $ 2,049 Total gains or (losses): Included in other comprehensive income (loss) 134 Sale of available-for-sale securities (2,183 ) Balance, December 31, 2017 $ 0 The table below presents a reconciliation and income statement classification of gains and losses for all securities available for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2016: Pooled Balance, January 1, 2016 $ 3,413 Total gains or (losses): Included in other comprehensive income (loss) (442 ) Included in realized gains on available-for-sale securities 0 Sale of available-for-sale securities (922 ) Balance, December 31, 2016 $ 2,049 There were no Level 3 financial instruments carried at fair value on a recurring basis at December 31, 2017. The following table presents quantitative information about Level 3 fair value measurements at December 31, 2016: Fair Valuation Unobservable Input Utilized Pooled trust preferred $2,049 Discounted cash flow Collateral default rate Yield 0.5% in 2016 and thereafter 10% Prepayment speed 2.0% constant prepayment rate in 2016 and thereafter At December 31, 2016 the significant unobservable inputs used in the fair value measurement of the Corporation’s pooled trust preferred securities are collateral default rate, yield, and prepayment speed. Significant increases in specific-issuer default assumptions or decreases in specific-issuer recovery assumptions would result in a lower fair value measurement. Conversely, decreases in specific-issuer default assumptions or increases in specific-issuer recovery assumptions would result in a higher fair value measurement. Assets and liabilities measured at fair value on a non-recurring basis are as follows at December 31, 2017 and 2016: Fair Value Measurements at December 31, 2017 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Impaired loans: Commercial mortgages $ 11 0 0 $ 11 Fair Value Measurements at December 31, 2016 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Impaired loans: Commercial mortgages $ 2,067 0 0 $ 2,067 Impaired loans measured for impairment using the fair value of collateral for collateral dependent loans had a recorded investment of $646, with a valuation allowance of $635 as of December 31, 2017, resulting in an additional provision for loan losses of ($418) for the year then ended. Impaired loans measured for impairment using the fair value of collateral for collateral dependent loans had a recorded investment of $3,120, with a valuation allowance of $1,053 as of December 31, 2016, resulting in an additional provision for loan losses of ($189) for the year then ended. The estimated fair values of impaired collateral dependent loans such as commercial or residential mortgages are determined primarily through third-party appraisals. When a collateral dependent loan, such as a commercial or residential mortgage loan, becomes impaired, a decision is made regarding whether an updated certified appraisal of the real estate is necessary. This decision is based on various considerations, including the age of the most recent appraisal, the loan-to-value ratio based on the original appraisal, and the condition of the property. Appraised values are discounted to arrive at the estimated selling price of the collateral and a further reduction for estimated costs to sell the property is applied, which results in an amount that is considered to be the estimated fair value. If a loan becomes impaired and the appraisal of related loan collateral is outdated, management applies an appropriate adjustment factor based on its experience with current valuations of similar collateral in determining the loan’s estimated fair value and resulting allowance for loan losses. Third-party appraisals are not customarily obtained in respect of unimpaired loans, unless in management’s view changes in circumstances warrant obtaining an updated appraisal. The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2017: Fair Valuation Unobservable Inputs Range Impaired loans – commercial mortgages $ 11 Discounted cash flow method Discount used in discounted cash flow method 10% (10%) The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2016: Fair Valuation Unobservable Inputs Range (Weighted Impaired loans – commercial mortgages $ 2,067 Sales comparison approach and discounted cash flow method Adjustment for differences between the comparable sales and discount used in discounted cash flows 10% – 14% (13%) Fair Value of Financial Instruments The following table presents the carrying amount and fair value of financial instruments at December 31, 2017: Carrying Amount Fair Value Measurement Using: Total Fair Value Level 1 Level 2 Level 3 ASSETS Cash and cash equivalents $ 35,345 $ 35,345 $ 0 $ 0 $ 35,345 Securities available for sale 409,709 962 408,747 0 409,709 Trading securities 7,150 7,098 52 0 7,150 Loans held for sale 852 0 853 0 853 Net loans 2,126,266 0 0 2,126,824 2,126,824 FHLB and other equity interests 21,517 n/a n/a n/a n/a Interest rate swaps 149 0 149 0 149 Accrued interest receivable 9,254 6 2,651 6,597 9,254 LIABILITIES Deposits $ (2,167,815 ) $ (1,802,844 ) $ (362,756 ) $ 0 $ (2,165,600 ) FHLB and other borrowings (257,359 ) 0 (257,361 ) 0 (257,361 ) Subordinated debentures (70,620 ) 0 (63,575 ) 0 (63,575 ) Deposits held for sale 0 0 0 0 0 Interest rate swaps (310 ) 0 (310 ) 0 (310 ) Accrued interest payable (554 ) 0 (554 ) (0 ) (554 ) The following table presents the carrying amount and fair value of financial instruments at December 31, 2016: Carrying Amount Fair Value Measurement Using: Total Fair Value Level 1 Level 2 Level 3 ASSETS Cash and cash equivalents $ 29,183 $ 29,183 $ 0 $ 0 $ 29,183 Securities available for sale 495,835 971 492,815 2,049 495,835 Trading securities 4,858 4,805 53 0 4,858 Loans held for sale 7,528 0 7,553 0 7,553 Net loans 1,857,206 0 0 1,817,341 1,817,341 FHLB and other equity interests 19,186 n/a n/a n/a n/a Interest rate swaps 211 0 211 0 211 Accrued interest receivable 8,264 6 3,014 5,244 8,264 LIABILITIES Deposits $ (2,017,522 ) $ (1,785,649 ) $ (219,765 ) $ 0 $ (2,005,414 ) FHLB and other borrowings (237,004 ) 0 (226,769 ) 0 (226,769 ) Subordinated debentures (70,620 ) 0 (61,831 ) 0 (61,831 ) Deposits held for sale (6,456 ) 0 (6,417 ) 0 (6,417 ) Interest rate swaps (670 ) 0 (670 ) 0 (670 ) Accrued interest payable (510 ) 0 (510 ) 0 (510 ) The methods and assumptions, not otherwise presented, used to estimate fair values are described as follows: Cash and cash equivalents: Loans held for sale: Loans: Deposits held for sale: FHLB and other equity interests: Accrued interest receivable: Deposits: FHLB and other borrowings: Subordinated debentures: Accrued interest payable: While estimates of fair value are based on management’s judgment of the most appropriate factors as of the balance sheet date, there is no assurance that the estimated fair values would have been realized if the assets had been disposed of or the liabilities settled at that date, since market values may differ depending on various circumstances. The estimated fair values would also not apply to subsequent dates. In addition, other assets and liabilities that are not financial instruments, such as premises and equipment, are not included in the disclosures. Also, non-financial assets such as, among other things, the estimated earnings power of core deposits, the earnings potential of trust accounts, the trained workforce, and customer goodwill, which typically are not recognized on the balance sheet, may have value but are not included in the fair value disclosures.

Parent Company Only Financial I

Parent Company Only Financial Information	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent Company Only Financial Information	21. Parent Company Only Financial Information CONDENSED BALANCE SHEETS December 31, 2017 2016 Assets Cash $ 1,556 $ 1,436 Trading securities 580 529 Investment in bank subsidiary 290,156 257,476 Investment in non-bank subsidiaries 21,781 23,324 Deferreds and Current Receivable 2,055 1,066 Other assets 2,059 2,666 Total assets $ 318,187 $ 286,497 Liabilities Borrowings from subsidiary $ 1,400 $ 1,400 Subordinated debentures 70,620 70,620 Other liabilities 2,257 2,693 Total liabilities 74,277 74,713 Total shareholders’ equity 243,910 201,913 Total liabilities and shareholders’ equity $ 318,187 $ 286,497 CONDENSED STATEMENTS OF INCOME Year Ended December 31, Income: 2017 2016 2015 Dividends from: Bank subsidiary $ 8,840 $ 8,700 $ 10,404 Non-bank subsidiaries 2,250 1,200 323 Other 220 230 157 Total income 11,310 10,130 10,884 Expenses (4,957 ) (2,611 ) (1,708 ) Income before income taxes and equity in undistributed net income of subsidiaries: 6,353 7,519 9,176 Income tax benefit 1,614 813 547 Equity in undistributed net income of bank subsidiary 17,430 13,184 11,889 Distributions in excess of net income of non-bank subsidiaries (1,537 ) (976 ) 585 Net income $ 23,860 $ 20,540 $ 22,197 CONDENSED STATEMENTS OF CASH FLOWS Year Ended December 31, 2017 2016 2015 Net income Adjustments to reconcile net income to net cash provided by $ 23,860 $ 20,540 $ 22,197 operating activities: Equity in undistributed net income of bank subsidiary (17,430 ) (13,184 ) (11,889 ) Equity in undistributed net income (distributions in excess of net income) of non-bank subsidiaries 1,537 976 (585 ) Net unrealized gains on trading securities (12 ) (58 ) (11 ) Decrease (increase) in other assets (549 ) (1,277 ) 9 (Decrease) increase in other liabilities 791 1,645 663 Net cash provided by operating activities 8,197 8,642 10,384 Cash flows from investing activities Investment in bank subsidiaries (15,400 ) (49,223 ) 0 Net cash used in investing activities (15,400 ) (49,223 ) 0 Cash flows from financing activities: Dividends paid (10,094 ) (9,546 ) (9,515 ) Proceeds from issuance of long term debt 0 50,000 0 Purchase of treasury stock (1,877 ) (44 ) (868 ) Net proceeds from issuance of common stock 19,294 0 0 Net advance from subsidiary 0 50 0 Net cash provided by (used in) financing activities 7,323 40,460 (10,383 ) Net increase (decrease) in cash 120 (121 ) 1 Cash beginning of year 1,436 1,557 1,556 Cash end of year $ 1,556 $ 1,436 $ 1,557

Other Comprehensive Income

Other Comprehensive Income	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Other Comprehensive Income	22. Other Comprehensive Income Other comprehensive income components and related tax effects were as follows for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Unrealized holding losses on available for sale securities $ (136 ) $ (1,838 ) $ (623 ) Less reclassification adjustment for gains recognized in earnings (160 ) (83 ) (666 ) Net unrealized losses (296 ) (1,921 ) (1,289 ) Tax effect 104 672 452 Net-of-tax amount (192 ) (1,249 ) (837 ) Unrealized holding gains on available for sale securities for which a portion of an other-than-temporary impairment has been recognized in earnings 134 (442 ) 2,508 Less reclassification adjustment for gains recognized in earnings (1,383 ) (922 ) 0 Net unrealized gains (1,249 ) (1,364 ) 2,508 Tax effect 437 477 (878 ) Net-of-tax amount (812 ) (887 ) 1,630 Actuarial gain (loss) on postemployment health care plan 808 (282 ) (311 ) Net amortization of transition obligation and actuarial gain 192 184 173 Net unrealized gain (loss) on postemployment health care plan 1,000 (98 ) (138 ) Tax effect (175 ) 34 48 Net-of-tax amount 825 (64 ) (90 ) Unrealized gain (loss) on interest rate swap 10 (63 ) (168 ) Less reclassification adjustment for losses recognized in earnings 288 340 378 Net unrealized gain 298 277 210 Tax effect (104 ) (97 ) (73 ) Net-of-tax amount 194 180 137 Other comprehensive income (loss) $ 15 $ (2,020 ) $ 840 The following is a summary of the change in the accumulated other comprehensive income (loss) balance, net of tax, for the years ended December 31, 2017, 2016, and 2015. Balance Comprehensive Reclassification of Balance 12/31/16 Income (Loss) Tax Effect 12/31/17 Unrealized gains (losses) on securities available for sale $ 1,393 $ (1,004 ) $ 84 $ 473 Unrealized gain (loss) on postretirement benefits plan (1,217 ) 825 (298 ) (690 ) Unrealized loss on interest rate swap (297 ) 194 (23 ) (126 ) Total $ (121 ) $ 15 $ (237 ) $ (343 ) Balance Comprehensive Reclassification of Balance 12/31/15 Income (Loss) Tax Effect 12/31/16 Unrealized gains (losses) on securities available for sale $ 3,529 $ (2,136 ) $ 0 $ 1,393 Unrealized gain (loss) on postretirement benefits plan (1,153 ) (64 ) 0 (1,217 ) Unrealized loss on interest rate swap (477 ) 180 0 (297 ) Total $ 1,899 $ (2,020 ) $ 0 $ (121 ) Balance Comprehensive Reclassification of Balance 1/1/15 Income (Loss) Tax Effect 12/31/15 Unrealized gains (losses) on securities available for sale $ 2,736 $ 793 $ 0 $ 3,529 Unrealized gain (loss) on postretirement benefits plan (1,063 ) (90 ) 0 (1,153 ) Unrealized loss on interest rate swap (614 ) 137 0 (477 ) Total $ 1,059 $ 840 $ 0 $ 1,899

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	23. Quarterly Financial Data (Unaudited) The unaudited quarterly results of operations for the years ended December 31, 2017 and 2016 are as follows: Quarters Ended in 2017 Quarters Ended in 2016 Mar. 31 June 30 Sept. 30 Dec. 31 Mar. 31 June 30 Sept. 30 Dec. 31 Total interest and dividend income $ 25,104 $ 27,003 $ 28,069 $ 28,698 $ 22,066 $ 22,473 $ 24,958 $ 24,818 Net interest income 21,202 22,989 23,517 23,801 18,942 19,403 21,933 21,009 Provision for loan losses 1,016 1,134 1,400 3,105 1,196 220 622 2,111 Non-interest income 5,773 5,089 5,032 5,541 3,777 4,819 4,473 4,622 Non-interest expense 17,034 17,797 17,618 17,588 14,814 18,753 17,096 16,455 Net income 6,480 6,683 7,246 3,451 5,019 4,065 6,416 5,040 Net income per share, basic 0.43 0.44 0.47 0.23 0.35 0.28 0.44 0.35 Net income per share, diluted 0.43 0.44 0.47 0.23 0.35 0.28 0.44 0.35

Summary of Significant Accoun32

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Organization	Business and Organization CNB Financial Corporation (the “Corporation”) is headquartered in Clearfield, Pennsylvania, and provides a full range of banking and related services through its wholly owned subsidiary, CNB Bank (the “Bank”). In addition, the Bank provides trust and asset management services, including the administration of trusts and estates, retirement plans, and other employee benefit plans as well as a full range of wealth management services. The Bank serves individual and corporate customers and is subject to competition from other financial institutions and intermediaries with respect to these services. In addition to the Bank, the Corporation also operates a consumer discount loan and finance business through its wholly owned subsidiary, Holiday Financial Services Corporation (“Holiday”). The Corporation and these and its other subsidiaries are subject to examination by federal and state regulators. The Corporation’s market area is primarily concentrated in the central and northwest regions of the Commonwealth of Pennsylvania, the central and northeast regions of the state of Ohio and western New York.
Basis of Financial Presentation	Basis of Financial Presentation The financial statements are consolidated to include the accounts of the Corporation and the Bank, CNB Securities Corporation, Holiday, and CNB Insurance Agency. All significant intercompany accounts and transactions have been eliminated in the consolidated financial statements. Certain prior period amounts have been reclassified to conform to the current period presentation. Reclassifications had no effect on prior year net income or shareholders’ equity.
Use of Estimates	Use of Estimates To prepare financial statements in conformity with accounting principles generally accepted in the U.S., management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ.
Operating Segments	Operating Segments While the chief decision-makers monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Corporation-wide basis, and operating segments are aggregated into one as operating results for all segments are similar. Accordingly, all of the financial service operations are considered by management to be aggregated in one reportable operating segment.
Securities	Securities When purchased, securities are classified as held to maturity, trading or available for sale. Debt securities are classified as held to maturity when the Corporation has the positive intent and ability to hold the securities to maturity. Held to maturity securities are carried at amortized cost. Debt or equity securities are classified as trading when purchased principally for the purpose of selling them in the near term, or when the fair value option has been elected. Trading securities are recorded at fair value with changes in fair value included in earnings in non-interest income. Available for sale securities are those securities not classified as held to maturity or trading and are carried at their fair value. Unrealized gains and losses, net of deferred tax, on securities classified as available for sale are recorded as other comprehensive income. Management has not classified any debt securities as held to maturity. The amortized cost of debt securities classified as held to maturity or available for sale is adjusted for the amortization of premiums and the accretion of discounts over the period through contractual maturity or, in the case of mortgage-backed securities and collateralized mortgage obligations, over the estimated life of the security. Such amortization is included in interest income from securities. Gains and losses on securities sold are recorded on the trade date and based on the specific identification method. Declines in the fair value of debt securities below their cost that are other-than-temporary and attributable to credit losses are reflected in earnings. Other-than-temporary impairment losses that are not attributable to credit losses are reported as a component of accumulated other comprehensive income. In estimating other-than-temporary losses, management considers: the length of time and extent that fair value has been less than cost, the financial condition and near term prospects of the issuer, and the Corporation’s intent to sell, or whether it is more likely than not that it will be required to sell a security in an unrealized loss position before recovery of its amortized cost basis. If the Corporation intends to sell a security or it is more likely than not it will be required to sell a security before recovery of its amortized cost basis, the entire difference between amortized cost and fair value is recognized as impairment through earnings.
Loans	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding. Interest income is reported on the interest method and includes amortization of net deferred loan fees and costs over the loan term. Interest income on commercial, industrial, and agricultural loans, commercial mortgage loans, and residential real estate loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Consumer loans are typically charged off no later than 180 days past due. Past due status is based on the contractual terms of the loan. Loans, including loans modified in a troubled debt restructuring, are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. Nonaccrual loans and loans past due 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. All interest accrued but not received on 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. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. For all portfolio segments, loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Concentration of Credit Risk	Concentration of Credit Risk Most of the Corporation’s business activity is with customers located within the Commonwealth of Pennsylvania and the states of Ohio and New York. Therefore, the Corporation’s exposure to credit risk is significantly affected by changes in the economies of Pennsylvania, Ohio, and New York.
Purchased Loans	Purchased Loans The Corporation purchased loans in connection with its acquisition of FC Banc Corp. in 2013 and Lake National Bank in 2016, some of which had, at the acquisition date, shown evidence of credit deterioration since origination. These purchased credit impaired loans were recorded at the amount paid, such that there was no carryover of the seller’s allowance for loan losses. Such purchased credit impaired loans are accounted for individually, and the Corporation estimates the amount and timing of expected cash flows for each loan. The expected cash flows in excess of the amount paid is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan, 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 the expected cash flows is greater than the carrying amount, it is recognized as part of future interest income. For loans purchased that did not show evidence of credit deterioration, the difference between the fair value of the loan at the acquisition date and the loan’s face value is being amortized as a yield adjustment over the estimated remaining life of the loan using the effective interest method.
Loans Held for Sale	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Mortgage loans held for sale are generally sold with servicing rights retained. The carrying value of the mortgage loan sold is reduced by the amount allocated to the servicing right. Gains and losses on sales of mortgage loans are based on the difference between the selling price and the carrying value of the related loan sold.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance account. Management determines the adequacy of the allowance based on historical patterns of charge-offs and recoveries, the nature and volume of the portfolio, information about specific borrower situations and estimated collateral values, industry experience, economic conditions, and other qualitative factors relevant to the collectability of the loan portfolio. While management believes that the allowance is adequate to absorb probable loan losses incurred at the balance sheet date, future adjustments may be necessary due to circumstances that differ substantially from the assumptions used in evaluating the adequacy of the allowance for loan losses. The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. A loan is impaired when, based on current information and events, it is probable that the Corporation will be unable to collect all amounts due according to the contractual terms of the loan agreement. Loans for which the terms have been modified, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings and classified as impaired. Commercial and commercial real estate loans are individually evaluated for impairment. If a loan is impaired, a portion of the allowance is allocated so that the loan is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. Large groups of smaller balance homogeneous loans, such as consumer and residential real estate loans, are collectively evaluated for impairment, and accordingly, they are not separately identified for impairment disclosures. Troubled debt restructurings are measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. For troubled debt restructurings that subsequently default, the Corporation determines the amount of reserve in accordance with the accounting policy for the allowance for loan losses. The general component of the allowance for loan losses covers non-impaired The following portfolio segments, which are the same as the Corporation’s portfolio classifications and associated risk characteristics, have been identified: ● Commercial, industrial, and agricultural – risk characteristics include below average economic and employment conditions in many of the markets served by the Corporation, which has limited consumer spending. ● Commercial mortgages – the most significant risk characteristic is the subjectivity involved in real estate valuations for properties located in areas with low growth economies. ● Residential real estate – risk characteristics include slightly higher than historical levels of delinquencies and less than robust housing markets. ● Consumer – risk characteristics include continuing weakness in industrial employment in many of the markets served by the Corporation and low wage growth. ● Credit cards – the most significant risk characteristic is the unsecured nature of credit card loans. ● Overdrafts – risk characteristics include the Corporation’s continued deposit growth and overall economic conditions which may lead to a greater likelihood of overdrawn deposit accounts.
Federal Home Loan Bank (FHLB) Stock	Federal Home Loan Bank (FHLB) Stock As a member of the Federal Home Loan Bank of Pittsburgh (“FHLB”), the Corporation is required to purchase and hold stock in the FHLB to satisfy membership and borrowing requirements. This stock is restricted in that it can only be sold to the FHLB or to another member institution, and all sales of FHLB stock must be at par. As a result of these restrictions, FHLB stock is unlike other investment securities insofar as there is no trading market for FHLB stock and the transfer price is determined by FHLB membership rules and not by market participants. FHLB stock is held as a long-term investment, is valued at its cost basis and is analyzed for impairment based on the ultimate recoverability of the par value. The Company evaluates impairment quarterly. The decision of whether impairment exists is a matter of judgment that reflects our view of the FHLB’s long-term performance, which includes factors such as the following: ● its operating performance; ● the severity and duration of declines in the fair value of its net assets related to its capital stock amount; ● its commitment to make payments required by law or regulation and the level of such payments in relation to its operating performance; ● the impact of legislative and regulatory changes on the FHLB, and accordingly, on the members of FHLB; and ● its liquidity and funding position.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation. Depreciation of premises and equipment is computed principally by the straight line method. In general, useful lives range from 3 to 39 years with lives for furniture, fixtures and equipment ranging from 3 to 10 years and lives of buildings and building improvements ranging from 15 to 39 years. Amortization of leasehold improvements is computed using the straight-line method over useful lives of the leasehold improvements or the term of the lease, whichever is shorter. Maintenance, repairs and minor renewals are charged to expense as incurred.
Foreclosed Assets	Foreclosed Assets Assets acquired through or in lieu of loan foreclosure are initially recorded at fair value less estimated selling costs when acquired, establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. These assets are subsequently accounted for at the lower of cost or fair value, less estimated costs to sell. If fair value declines, a valuation allowance is recorded through expense. Costs after acquisition are expensed.
Bank Owned Life Insurance	Bank Owned Life Insurance The Corporation has purchased life insurance policies on certain key employees. Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill resulting from business combinations prior to January 1, 2009 represents the excess of the purchase price over the fair value of the net assets of businesses acquired. Goodwill resulting from business combinations after January 1, 2009 is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interest in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exist that indicate an impairment test should be performed. The Corporation has selected December 31 as the date to perform the annual impairment test. Intangible assets with definite useful lives are amortized over their estimated useful lives. Goodwill is the only intangible asset with an indefinite life on the Corporation’s balance sheet. Other intangible assets consist of core deposit intangible assets arising from the acquisition of FC Banc Corp. in 2013 and Lake National Bank in 2016. The core deposit intangible assets from these acquisitions are amortized using an accelerated method over their estimated useful lives of 7 years and 4 years, respectively.
Long-term Assets	Long-term Assets Premises and equipment, goodwill and other intangible assets, and other long-term assets are reviewed for impairment when events indicate their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded.
Derivatives	Derivatives Derivative financial instruments are recognized as assets or liabilities at fair value. The Corporation has interest rate swap agreements which are used as part of its asset liability management to help manage interest rate risk. The Corporation does not use derivatives for trading purposes. At the inception of a derivative contract, the Corporation designates the derivative as one of three types based on the purpose of the contract and belief as to its effectiveness as a hedge. These three types are (1) a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (“fair value hedge”), (2) a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) an instrument with no hedging designation (“stand-alone derivative”). For a fair value hedge, the gain or loss on the derivative, as well as the offsetting loss or gain on the hedged item, are recognized in current earnings as fair values change. For a cash flow hedge, the gain or loss on the derivative is reported in other comprehensive income and is reclassified into earnings in the same periods during which the hedged transaction affects earnings. For both types of hedges, changes in the fair value of derivatives that are not highly effective in hedging the changes in fair value or expected cash flows of the hedged item are recognized immediately in current earnings. Changes in the fair value of derivatives that do not qualify for hedge accounting are reported currently in earnings, as non-interest income. Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in non-interest income. Cash flows on hedges are classified in the cash flow statement the same as the cash flows of the items being hedged. The Corporation formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions, at the inception of the hedging relationship. This documentation includes linking fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. The Corporation also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Corporation discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as non-interest income. When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability. When a cash flow hedge is discontinued but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings.
Advertising Costs	Advertising Costs Advertising costs are generally expensed as incurred and amounted to $2,243, $1,799 and $1,580, for 2017, 2016, and 2015, respectively.
Mortgage Servicing Rights	Mortgage Servicing Rights Servicing rights are recognized separately when they are acquired through sales of loans. Servicing rights are initially recorded at fair value with the income statement effect recorded in mortgage banking. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds and default rates and losses. The Corporation compares the valuation model inputs and results to published industry data in order to validate the model results and assumptions. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into non-interest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to carrying amount. Impairment is determined by stratifying rights into groupings based on predominant risk characteristics, such as interest rate, loan type and investor type. Impairment is recognized through a valuation allowance for an individual grouping, to the extent that fair value is less than the carrying amount. If the Corporation later determines that all or a portion of the impairment no longer exists for a particular grouping, a reduction of the allowance may be recorded as an increase to income. Changes in valuation allowances are reported with mortgage banking income on the income statement. The fair values of servicing rights are subject to significant fluctuations as a result of changes in estimated and actual prepayment speeds and default rates and losses. Servicing fee income, which is reported on the income statement as mortgage banking income, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income. Late fees and ancillary fees related to loan servicing are not material.
Treasury Stock	Treasury Stock The purchase of the Corporation’s common stock is recorded at cost. Purchases of the stock are made in the open market based on market prices. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock on a first-in-first-out basis.
Stock-Based Compensation	Stock-Based Compensation The Corporation has a stock incentive plan for key employees and independent directors. The Stock Incentive Plan, which is administered by a committee of the Board of Directors, provides for up to 500,000 shares of common stock to be awarded in the form of nonqualified options or restricted stock. For key employees, the plan vesting schedule is one-fourth of granted stock-based awards per year beginning one year after the grant date with 100% vested on the fourth anniversary. For independent directors, the vesting schedule is one-third of granted stock-based awards per year beginning one year after the grant date with 100% vested on the third anniversary. At December 31, 2017 and 2016, there was no unrecognized compensation cost related to nonvested stock options granted under this plan, and no stock options were granted during the years ended December 31, 2017, 2016, and 2015. During 2017, 2016, and 2015, the Executive Compensation and Personnel Committee of the Board of Directors granted a total of 39,673, 52,750 and 48,300 shares, respectively, of restricted common stock to certain key employees and all independent directors of the Corporation. Compensation expense for the restricted stock awards is recognized over the requisite service period based on the fair value of the shares at the date of grant on a straight-line basis. Compensation expense resulting from these restricted stock awards was $928, $820 and $621 for the years ended December 31, 2017, 2016, and 2015, respectively.
Comprehensive Income	Comprehensive Income The Corporation presents comprehensive income as part of the Consolidated Statement of Income and Comprehensive Income. Other comprehensive income (loss) consists of unrealized holding gains (losses) on the available for sale securities portfolio, changes in the unrecognized actuarial gain and transition obligation related to the Corporation’s post retirement benefits plans, and changes in the fair value of the Corporation’s interest rate swaps, net of tax.
Income Taxes	Income Taxes The Corporation files a consolidated U.S. income tax return that includes all subsidiaries. Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Corporation recognizes interest and/or penalties related to income tax matters in income tax expense.
Retirement Plans	Retirement Plans The Corporation’s expense associated with its 401(k) plan is determined under the provisions of the plan document and includes both matching and profit sharing components. Deferred compensation and supplemental retirement plan expenses allocate the benefits over years of service.
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding during the applicable period, excluding outstanding participating securities. Diluted earnings per share is computed using the weighted average number of shares determined for the basic computation plus the dilutive effect of potential common shares issuable under certain stock compensation plans. Unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and are included in the computation of earnings per share pursuant to the two-class method. The Corporation has determined that its outstanding non-vested stock awards are participating securities.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the consolidated statement of cash flows, the Corporation defines cash and cash equivalents as cash and due from banks, interest bearing deposits with other banks, and Federal funds sold. Net cash flows are reported for customer loan and deposit transactions, interest bearing time deposits with other banks and borrowings with original maturities of 90 days or less.
Restrictions on Cash	Restrictions on Cash The Bank is required to maintain average reserve balances with the Federal Reserve Bank or in vault cash. The average amount of these non-interest bearing reserve balances for the year ended December 31, 2017 and 2016 was $50, which was maintained in vault cash. Note 12 to the consolidated financial statements discloses the cash collateral balances required to be maintained in connection with the Corporation’s interest rate swaps.
Loss Contingencies	Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are any such matters that will have a material effect on the financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in a separate note. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates.
Adoption of New Accounting Standards	Adoption of New Accounting Standards In March 2016, the FASB issued Accounting Standards Update 2016-09, “Compensation-Stock Compensation: Improvements to Employee Share-Based Payment Accounting.” ASU 2016-09 will require recognition of the income tax effects of share-based awards in the income statement when the awards vest or are settled (i.e., Additional Paid-in-Capital pools will be eliminated). The guidance was effective for interim and annual reporting periods beginning after December 15, 2016. The Corporation adopted ASU 2016-09 on January 1, 2017. The adoption did not have a material effect on the Corporation’s financial statements. In August 2016, the FASB issued an update (ASU 2016-15, Statement of Cash Flows) which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments in this Update apply to all entities, including business entities and not-for-profit entities that are required to present a statement of cash flows, and are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Corporation adopted ASU 2016-15 on January 1, 2018. The adoption did not have a material effect on the Corporation’s financial statements. On February 14, 2018, the Financial Accounting Standard Board issued Accounting Standards Update (ASU) No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this ASU allow, but do not require, entities to reclassify certain income tax effects in accumulated other comprehensive income (AOCI) to retained earnings that resulted from the Tax Cuts and Jobs Act (Act). The Corporation adopted this ASU and elected to reclassify the income tax effects of the Act from accumulated other comprehensive income to retained earnings at December 31, 2017. There were no other income tax effects related to the Act that were reclassified as a result of the adoption of the accounting standard.
Effect of Newly Issued But Not Yet Effective Accounting Standards	Effect of Newly Issued But Not Yet Effective Accounting Standards In June 2016, the FASB issued an update (ASU 2016-13, Financial Instruments – Credit Losses) which will require recognition of an entity’s current estimate of all expected credit losses for assets measured at amortized cost. The amendments in ASU 2016-13 eliminate the probable initial recognition threshold in current U.S. Generally Accepted Accounting Principles. In addition, the amendments in ASU 2016-13 broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually, such as loans. The update will be effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted for interim and annual reporting periods beginning after December 15, 2018. Management is currently in the developmental stages of evaluating the impact of the adoption of ASU 2016-13 on the Corporation’s financial statements and is collecting available historical information in order to assess the expected credit losses. However, the impact to the financial statements is yet to be determined. In February 2016, the FASB issued Accounting Standards Update 2016-02, “Leases (Topic 842)”. ASU 2016-02 requires a lessee to recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) A lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) A right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. Certain targeted improvements were made to align, where necessary, lessor accounting with the lessee accounting model and Topic 606, Revenue from Contracts with Customers. The update will be effective for reporting periods beginning after December 15, 2018. Early adoption is permitted. Management is currently evaluating the impact of the adoption of ASU 2016-02 on the Corporation’s financial statements and anticipates an increase in the Corporation’s assets and liabilities. However, the amounts that will be adjusted are still to be determined. In January 2016, the FASB issued Accounting Standards Update 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities”. ASU 2016-01 provides updated accounting and reporting requirements for both public and non-public entities. The most significant provisions that will impact the Corporation are: 1) equity securities available for sale will be measured at fair value, with the changes in fair value recognized in the income statement; 2) eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments at amortized cost on the balance sheet; 3) utilization of exit price notion when measuring the fair value of financial instruments for disclosure purposes; 4) require separate presentation of both financial assets and liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements. The update will be effective for interim and annual reporting periods beginning after December 15, 2017, using a cumulative-effect adjustment to the balance sheet as of the beginning of the year adoption. The adoption of ASU 2016-01 did not have a material effect on the Corporation’s financial statements. The Corporation adopted ASU 2016-01 on January 1, 2018. In May 2014, FASB issued Accounting Standards Update 2014-09, “Revenue from Contracts with Customers (Topic 606).” The ASU creates a new topic, Topic 606, to provide guidance on revenue recognition for entities that enter into contracts with customers to transfer goods or services or enter into contracts for the transfer of nonfinancial assets. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures are required to provide quantitative and qualitative information regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2017. The adoption of ASU 2014-09 did not have a material effect on the Corporation’s financial statements as most of the revenue relates to loans and other financial instruments which are scoped out. However, management does expect expansion to disclosures. The Corporation adopted ASU 2014-09 on January 1, 2018.

Business Combination and Bran33

Business Combination and Branch Sale (Tables)	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Schedule of Consideration Paid and Amounts of Assets Acquired and Liabilities Assumed	The following table summarizes the consideration paid for LNB and the amounts of the assets acquired and liabilities assumed that were recognized at the acquisition date: Consideration paid: Cash $ 24,750 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and cash equivalents 21,884 Securities available for sale 450 Loans 122,206 FHLB and other equity interests 637 Premises and equipment 3,242 Bank owned life insurance 2,152 Mortgage servicing rights 367 Core deposit intangible 1,583 Accrued interest receivable and other assets 3,110 Total assets acquired 155,631 Demand deposits 81,472 Time deposits 58,311 Accrued interest payable and other liabilities 2,634 Total liabilities assumed 142,417 Total identifiable net assets 13,214 Goodwill $ 11,536

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The computation of basic and diluted earnings per share is shown below (in thousands, except per share data). There were no anti-dilutive stock options for the years ended December 31, 2017, 2016, and 2015. Years Ended December 31 2017 2016 2015 Basic earnings per common share computation Net income per consolidated statements of income $ 23,860 $ 20,540 $ 22,197 Net earnings allocated to participating securities (135 ) (129 ) (117 ) Net earnings allocated to common stock $ 23,725 $ 20,411 $ 22,080 Distributed earnings allocated to common stock $ 10,030 $ 9,480 $ 9,460 Undistributed earnings allocated to common stock 13,695 10,931 12,620 Net earnings allocated to common stock $ 23,725 $ 20,411 $ 22,080 Weighted average common shares outstanding, including shares considered participating securities 15,212 14,457 14,408 Less: Average participating securities (80 ) (82 ) (70 ) Weighted average shares 15,132 14,375 14,338 Basic earnings per common share $ 1.57 $ 1.42 $ 1.54 Diluted earnings per common share computation Net earnings allocated to common stock $ 23,725 $ 20,411 $ 22,080 Weighted average common shares outstanding for basic earnings per common share 15,132 14,375 14,338 Add: Dilutive effects of assumed exercises of stock options 0 0 0 Weighted average shares and dilutive potential common shares 15,132 14,375 14,338 Diluted earnings per common share $ 1.57 $ 1.42 $ 1.54

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Cash and Cash Equivalents [Abstract]
Securities Available for Sale	Securities available-for-sale at December 31, 2017 and 2016 are as follows: December 31, 2017 December 31, 2016 Amortized Cost Unrealized Fair Value Amortized Cost Unrealized Fair Value Gains Losses Gains Losses U.S. Gov’t sponsored entities $108,578 $ 478 $ (908 ) $108,148 $139,823 $1,107 $ (579 ) $140,351 State & political subdivisions 134,428 3,609 (314) 137,723 153,492 4,194 (649 ) 157,037 Residential & multi-family mortgage 111,214 304 (1,882) 109,636 136,807 551 (2,382 ) 134,976 Corporate notes & bonds 17,610 52 (462) 17,200 18,299 77 (962 ) 17,414 Pooled trust preferred 0 0 0 0 800 1,249 0 2,049 Pooled SBA 36,260 355 (575) 36,040 43,450 505 (918 ) 43,037 Other equity securities 1,020 0 (58) 962 1,020 0 (49 ) 971 Total $409,110 $ 4,798 $ (4,199 ) $409,709 $493,691 $7,683 $(5,539) $495,835
Trading Securities	Trading securities at December 31, 2017 and 2016 are as follows: 2017 2016 Corporate equity securities $ 5,125 $ 3,312 Mutual Funds 1,499 1,037 Certificates of deposit 220 202 Corporate notes and bonds 254 254 U.S. Government sponsored entities 52 53 Total $ 7,150 $ 4,858
Securities with Unrealized Losses Aggregated by Investment Category and Length of Time that Individual Securities have been in Continuous Unrealized Loss Position	Securities with unrealized losses at December 31, 2017 and 2016, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows: December 31, 2017 Less than 12 Months 12 Months or More Total Description of Securities Fair Unrealized Fair Unrealized Fair Unrealized U.S. Gov’t sponsored entities $ 55,696 $ (540 ) $ 34,754 $ (368 ) $ 90,450 $ (908 ) State & political subdivisions 15,890 (69 ) 4,104 (245 ) 19,994 (314 ) Residential & multi-family mortgage 30,144 (153 ) 63,699 (1,729 ) 93,843 (1,882 ) Corporate notes & bonds 5,005 (9 ) 9,042 (453 ) 14,047 (462 ) Pooled SBA 0 (0 ) 22,270 (575 ) 22,270 (575 ) Other equity securities 0 (0 ) 962 (58 ) 962 (58 ) $ 106,735 $ (771 ) $ 134,831 $ (3,428 ) $ 241,566 $ (4,199 ) Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2016 U.S. Gov’t sponsored entities $ 90,380 $ (579 ) $ 0 $ (0 ) $ 90,380 $ (579 ) State & political subdivisions 32,353 (448 ) 264 (201 ) 32,617 (649 ) Residential and multi-family mortgage 65,598 (1,255 ) 34,611 (1,127 ) 100,209 (2,382 ) Corporate notes & bonds 2,089 (11 ) 8,476 (951 ) 10,565 (962 ) Pooled SBA 6,481 (126 ) 20,560 (792 ) 27,041 (918 ) Other equity securities 0 (0 ) 971 (49 ) 971 (49 ) $ 196,901 $ (2,419 ) $ 64,882 $ (3,120 ) $ 261,783 $ (5,539 )
Roll-Forward of Other-Than-Temporary Impairment Amount Related to Credit Losses	A roll-forward of the other-than-temporary impairment amount related to credit losses for the years ended December 31, 2017, 2016, and 2015 is as follows: 2017 2016 2015 Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in earnings, beginning of period $ 2,071 $ 4,054 $ 4,054 Credit losses previously recognized on securities sold during the period (2,071 ) (1,983 ) 0 Additional credit loss for which other-than-temporary impairment was not previously recognized 0 0 0 Additional credit loss for which other-than-temporary impairment was previously recognized 0 0 0 Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in earnings, end of period $ 0 $ 2,071 $ 4,054
Schedule of Contractual Maturity of Securities Available for Sale, Excluding Equity Securities	The following is a schedule of the contractual maturity of securities available for sale, excluding equity securities, at December 31, 2017: December 31, 2017 Amortized Cost Fair Value 1 year or less $ 50,368 $ 50,139 1 year – 5 years 153,512 155,075 5 years – 10 years 50,552 51,753 After 10 years 6,184 6,104 260,616 263,071 Residential and multi-family mortgage 111,214 109,636 Pooled SBA 36,260 36,040 Total debt securities $ 408,090 $ 408,747
Information Pertaining to Security Sales	Information pertaining to security sales is as follows: Year ended December 31 Proceeds Gross Gains Gross Losses 2017 $ 16,340 $ 1,614 $ 71 2016 4,420 1,005 0 2015 105,066 1,032 366

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Schedule of Net Loans	Total net loans at December 31, 2017 and 2016 are summarized as follows: 2017 2016 Commercial, industrial, and agricultural $ 749,138 $ 567,800 Commercial mortgages 600,065 574,826 Residential real estate 713,347 652,883 Consumer 80,193 74,816 Credit cards 6,753 6,046 Overdrafts 352 595 Less: unearned discount (3,889 ) (3,430 ) allowance for loan losses (19,693 ) (16,330 ) Loans, net $ 2,126,266 $ 1,857,206
Allowance for Loan Losses	Transactions in the allowance for loan losses for the year ended December 31, 2017 were as follows: Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses, January 1, 2017 $ 5,428 $ 6,753 $ 1,653 $ 2,215 $ 93 $ 188 $ 16,330 Charge-offs (544 ) (116 ) (466 ) (2,555 ) (144 ) (252 ) (4,077 ) Recoveries 235 197 78 161 27 87 785 Provision for loan losses 1,041 2,173 768 2,358 144 171 6,655 Allowance for loan losses, December 31, 2017 $ 6,160 $ 9,007 $ 2,033 $ 2,179 $ 120 $ 194 $ 19,693 Transactions in the allowance for loan losses for the year ended December 31, 2016 were as follows: Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses, January 1, 2016 $ 6,035 $ 5,605 $ 2,475 $ 2,371 $ 90 $ 161 $ 16,737 Charge-offs (601 ) (201 ) (499 ) (3,324 ) (96 ) (240 ) (4,961 ) Recoveries 89 8 93 122 22 71 405 Provision for loan losses (95 ) 1,341 (416 ) 3,046 77 196 4,149 Allowance for loan losses, December 31, 2016 $ 5,428 $ 6,753 $ 1,653 $ 2,215 $ 93 $ 188 $ 16,330 Transactions in the allowance for loan losses for the year ended December 31, 2015 were as follows: Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses, January 1, 2015 $ 7,114 $ 5,310 $ 2,479 $ 2,205 $ 71 $ 194 $ 17,373 Charge-offs (307 ) (486 ) (632 ) (1,956 ) (116 ) (221 ) (3,718 ) Recoveries 267 52 8 96 14 85 522 Provision for loan losses (1,039 ) 729 620 2,026 121 103 2,560 Allowance for loan losses, December 31, 2015 $ 6,035 $ 5,605 $ 2,475 $ 2,371 $ 90 $ 161 $ 16,737
Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and is based on the Corporation’s impairment method as of December 31, 2017 and 2016. The recorded investment in loans excludes accrued interest and unearned discounts due to their insignificance. December 31, 2017 Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 47 $ 0 $ 0 $ 0 $ 0 $ 0 $ 47 Collectively evaluated for impairment 5,868 3,563 2,033 2,179 120 194 13,957 Acquired with deteriorated credit quality 0 0 0 0 0 0 0 Modified in a troubled debt restructuring 245 5,444 0 0 0 0 5,689 Total ending allowance balance $ 6,160 $ 9,007 $ 2,033 $ 2,179 $ 120 $ 194 $ 19,693 Loans: Individually evaluated for impairment $ 1,187 $ 51 $ 0 $ 0 $ 0 $ 0 $ 1,238 Collectively evaluated for impairment 742,738 586,845 713,347 80,193 6,753 352 2,130,228 Acquired with deteriorated credit quality 0 1,079 0 0 0 0 1,079 Modified in a troubled debt restructuring 5,213 12,090 0 0 0 0 17,303 Total ending loans balance $ 749,138 $ 600,065 $ 713,347 $ 80,193 $ 6,753 $ 352 $ 2,149,848 December 31, 2016 Commercial, Commercial Residential Consumer Credit Overdrafts Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 188 $ 996 $ 0 $ 0 $ 0 $ 0 $ 1,184 Collectively evaluated for impairment 5,115 3,543 1,653 2,215 93 188 12,807 Acquired with deteriorated credit quality 0 0 0 0 0 0 0 Modified in a troubled debt restructuring 125 2,214 0 0 0 0 2,339 Total ending allowance balance $ 5,428 $ 6,753 $ 1,653 $ 2,215 $ 93 $ 188 $ 16,330 Loans: Individually evaluated for impairment $ 775 $ 6,176 $ 0 $ 0 $ 0 $ 0 $ 6,951 Collectively evaluated for impairment 564,180 557,932 652,883 74,816 6,046 595 1,856,452 Acquired with deteriorated credit quality 205 1,527 0 0 0 0 1,732 Modified in a troubled debt restructuring 2,640 9,191 0 0 0 0 11,831 Total ending loans balance $ 567,800 $ 574,826 $ 652,883 $ 74,816 $ 6,046 $ 595 $ 1,876,966
Loans Individually Evaluated for Impairment Including Loans Modified in Troubled Debt Restructurings by Portfolio Segment	The following tables present information related to loans individually evaluated for impairment, including loans modified in troubled debt restructurings, by portfolio segment as of December 31, 2017 and 2016 and for the years ended December 31, 2017, 2016, and 2015: December 31, 2017 Unpaid Balance Recorded Investment Allowance Losses With an allowance recorded: Commercial, industrial, and agricultural $ 1,915 $ 1,915 $ 292 Commercial mortgage 9,940 9,731 5,444 Residential real estate 0 0 0 With no related allowance recorded: Commercial, industrial, and agricultural 5,264 4,485 0 Commercial mortgage 3,211 2,410 0 Residential real estate 0 0 0 Total $ 20,330 $ 18,541 $ 5,736 December 31, 2016 Unpaid Balance Recorded Investment Allowance Losses With an allowance recorded: Commercial, industrial, and agricultural $ 1,644 $ 1,644 $ 313 Commercial mortgage 16,200 15,367 3,210 Residential real estate 0 0 0 With no related allowance recorded: Commercial, industrial, and agricultural 2,669 1,771 0 Commercial mortgage 0 0 0 Residential real estate 0 0 0 Total $ 20,513 $ 18,782 $ 3,523
Impaired Financing Receivables with Related and not Related Allowances	The unpaid principal balance of impaired loans includes the Corporation’s recorded investment in the loan and amounts that have been charged off. Year Ended December 31, 2017 Average Interest Cash Basis With an allowance recorded: Commercial, industrial, and agricultural $ 1,513 $ 97 $ 97 Commercial mortgage 11,944 327 327 Residential real estate 0 0 0 With no related allowance recorded: Commercial, industrial, and agricultural 2,438 114 114 Commercial mortgage 2,474 122 122 Residential real estate 0 0 0 Total $ 18,369 $ 660 $ 660 Year Ended December 31, 2016 Average Interest Cash Basis With an allowance recorded: Commercial, industrial, and agricultural $ 2,616 $ 2 $ 2 Commercial mortgage 8,138 0 0 Residential real estate 50 6 6 With no related allowance recorded: Commercial, industrial, and agricultural 2,290 0 0 Commercial mortgage 2,773 0 0 Residential real estate 0 0 0 Total $ 15,867 $ 8 $ 8 Year Ended December 31, 2015 Average Interest Cash Basis With an allowance recorded: Commercial, industrial, and agricultural $ 5,667 $ 44 $ 44 Commercial mortgage 8,154 0 0 Residential real estate 370 21 21 With no related allowance recorded: Commercial, industrial, and agricultural 1,831 14 14 Commercial mortgage 4,806 0 0 Residential real estate 103 6 6 Total $ 20,931 $ 85 $ 85
Nonaccrual Loans and Loans Past Due over 90 Days Still Accruing Interest by Class of Loans	The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of December 31, 2017 and 2016: December 31, 2017 December 31, 2016 Nonaccrual Past Due Over 90 Days Still on Accrual Nonaccrual Past Due Over 90 Days Still on Accrual Commercial, industrial, and agricultural $ 1,869 $ 78 $ 2,734 $ 0 Commercial mortgages 11,065 0 5,996 0 Residential real estate 5,470 338 5,600 0 Consumer 828 17 999 0 Credit cards 0 44 0 10 Total $ 19,232 $ 477 $ 15,329 $ 10
Aging of Recorded Investment in Past Due Loans	The following table presents the aging of the recorded investment in past due loans as of December 31, 2017 and 2016 by class of loans. December 31, 2017 30-59 Days 60-89 Days Greater Than Total Loans Not Total Commercial, industrial, and agricultural $ 2,745 $ 646 $ 748 $ 4,139 $ 744,999 $ 749,138 Commercial mortgages 233 0 292 525 599,540 600,065 Residential real estate 2,290 1,494 4,655 8,439 704,908 713,347 Consumer 454 307 812 1,573 78,620 80,193 Credit cards 31 10 44 85 6,668 6,753 Overdrafts 0 0 0 0 352 352 Total $ 5,753 $ 2,457 $ 6,551 $ 14,761 $ 2,135,087 $ 2,149,848 December 31, 2016 30-59 Days 60-89 Days Greater Than Total Loans Not Total Commercial, industrial, and agricultural $ 1,558 $ 299 $ 1,294 $ 3,151 $ 564,649 $ 567,800 Commercial mortgages 559 0 1,516 2,075 572,751 574,826 Residential real estate 2,155 737 3,710 6,602 646,281 652,883 Consumer 648 890 974 2,512 72,304 74,816 Credit cards 105 0 10 115 5,931 6,046 Overdrafts 0 0 0 0 595 595 Total $ 5,025 $ 1,926 $ 7,504 $ 14,455 $ 1,862,511 $ 1,876,966
Restructured in Troubled Debt	The following table presents the number of loans, loan balances, and specific reserves for loans that have been restructured in a troubled debt restructuring as of December 31, 2017 and December 31, 2016. December 31, 2017 December 31, 2016 Number of Loans Loan Balance Specific Reserve Number of Loans Loan Balance Specific Reserve Commercial, industrial, and agricultural 10 $ 5,213 $ 245 7 $ 2,640 $ 125 Commercial mortgages 9 12,090 5,444 8 9,191 2,214 Residential real estate 0 0 0 0 0 0 Consumer 0 0 0 0 0 0 Credit cards 0 0 0 0 0 0 Total 19 $ 17,303 $ 5,689 15 $ 11,831 $ 2,339
Loans by Class Modified as Troubled Debt Restructurings	The following table presents loans by class modified as troubled debt restructurings that occurred during the years ended December 31, 2017, 2016, and 2015: Year Ended December 31, 2017 Number of Loans Pre-Modification Post-Modification Commercial, industrial, and agricultural 4 $ 2,750 $ 2,750 Commercial mortgages 2 6,421 6,421 Residential real estate 0 0 0 Consumer 0 0 0 Credit cards 0 0 0 Total 6 $ 9,171 $ 9,171 Year Ended December 31, 2016 Number of Loans Pre-Modification Post-Modification Commercial, industrial, and agricultural 1 $ 109 $ 109 Commercial mortgages 0 0 0 Residential real estate 0 0 0 Consumer 0 0 0 Credit cards 0 0 0 Total 1 $ 109 $ 109 Year Ended December 31, 2015 Number of Loans Pre-Modification Post-Modification Commercial, industrial, and agricultural 1 $ 1,327 $ 1,327 Commercial mortgages 0 0 0 Residential real estate 0 0 0 Consumer 0 0 0 Credit cards 0 0 0 Total 1 $ 1,327 $ 1,327
Schedule of Loan Assigned Risk Rating within 12 Months of Balance Sheet Date	All loans included in the following tables have been assigned a risk rating within 12 months of the balance sheet date. December 31, 2017 Pass Special Substandard Doubtful Total Commercial, industrial, and agricultural $ 713,102 $ 16,726 $ 19,310 $ 0 $ 749,138 Commercial mortgages 581,631 4,419 14,015 0 600,065 Total $ 1,294,733 $ 21,145 $ 33,325 $ 0 $ 1,349,203 December 31, 2016 Pass Special Substandard Doubtful Total Commercial, industrial, and agricultural $ 531,320 $ 14,638 $ 21,831 $ 11 $ 567,800 Commercial mortgages 551,474 1,809 21,543 0 574,826 Total $ 1,082,794 $ 16,447 $ 43,374 $ 11 $ 1,142,626
Recorded Investment in Residential, Consumer and Credit Card Loans Based on Payment Activity	The following table presents the recorded investment in residential, consumer, and credit card loans based on performance status as of December 31, 2017 and December 31, 2016: December 31, 2017 December 31, 2016 Residential Consumer Credit Residential Consumer Credit Performing $ 707,539 $ 79,348 $ 6,709 $ 647,283 $ 73,817 $ 6,036 Nonperforming 5,808 845 44 5,600 999 10 Total $ 713,347 $ 80,193 $ 6,753 $ 652,883 $ 74,816 $ 6,046
Summary of Holiday's Loan Portfolio Included in Consumer and Residential Loans	Holiday’s loan portfolio, included in consumer and residential loans above, is summarized as follows at December 31, 2017 and 2016: 2017 2016 Consumer $ 23,428 $ 24,026 Residential real estate 0 1,209 Less: unearned discount (3,889 ) (3,430 ) Total $ 19,539 $ 21,805

Secondary Market Mortgage Act37

Secondary Market Mortgage Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Summary of Secondary Market Mortgage Activities	The following summarizes secondary market mortgage activities for the years ended December 31, 2017, 2016 and 2015: 2017 2016 2015 Loans originated for resale $ 25,231 $ 31,255 $ 15,171 Proceeds from sales of loans held for sale 24,285 33,045 14,927 Net gains on sales of loans held for sale 545 818 630 Loan servicing fees 563 421 390
Summary of Activity for Capitalized Mortgage Servicing Rights	The following summarizes activity for capitalized mortgage servicing rights for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Balance, beginning of year $ 1,391 $ 962 $ 856 Additions 198 200 380 Servicing rights acquired 0 367 0 Amortization (202 ) (138 ) (274 ) Balance, end of year $ 1,387 $ 1,391 $ 962

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	The following summarizes premises and equipment at December 31, 2017 and 2016: 2017 2016 Land $ 8,147 $ 7,324 Premises and leasehold improvements 53,903 48,563 Furniture and equipment 31,238 30,125 Construction in process 71 4,014 93,359 90,026 Less: accumulated depreciation 42,644 40,504 Premises and equipment, net $ 50,715 $ 49,522
Summary of Minimum Annual Rental Commitments Under Operating Lease	The minimum annual rental commitments under these leases at December 31, 2017 are as follows: 2018 $ 1,167 2019 1,021 2020 836 2021 736 2022 578 Thereafter 3,530 $ 7,868
Summary of Minimum Annual Rental Commitments Under Sale Lease Back	The minimum annual rental commitments under this sale-leaseback transaction at December 31, 2017 are as follows: 2018 $ 105 2019 105 2020 105 2021 105 2022 105 Thereafter 420 $ 945

Foreclosed Assets (Tables)

Foreclosed Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Summary of Foreclosed Assets Activity	Foreclosed real estate is reported net of a valuation allowance and included in accrued interest receivable and other assets in the accompanying consolidated balance sheets. Activity for the years ended December 31, 2017, 2016, and 2015 is as follows: 2017 2016 2015 Balance, beginning of year $ 1,015 $ 654 $ 806 Acquired from Lake National Bank 0 665 0 Additions 630 120 806 Sales (at carrying value) (935 ) (424 ) (958 ) Balance, end of year $ 710 $ 1,015 $ 654
Summary of Expenses Related to Foreclosed Real Estate	Expenses related to foreclosed real estate include: 2017 2016 2015 Net (gain) loss on sale $ (208 ) $ (134 ) $ 3 Operating expenses, net of rental income 366 223 169 $ 158 $ 89 $ 172

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Change in Carrying Amount of Goodwill	The change in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 is as follows: 2017 2016 Balance, beginning of year $ 38,730 $ 27,194 Acquired during the year 0 11,536 Balance, end of year $ 38,730 $ 38,730
Estimated Amortization Expense of Core Deposit Intangible Assets	Estimated amortization expense of core deposit intangible assets for each of the next five years is as follows: 2018 $ 898 2019 567 2020 160 2021 0 2022 0

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Summary of Time Certificates of Deposit Accounts Included in Total Deposits and Their Remaining Maturities	The following table reflects time certificates of deposit accounts included in total deposits and their remaining maturities at December 31, 2017: Time deposits maturing: 2018 $ 125,809 2019 128,602 2020 91,799 2021 7,954 2022 6,881 Thereafter 3,926 $ 364,971

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Schedule of Remaining Borrowing Capacity with FHLB	Borrowings from the FHLB at December 31, 2017 and 2016 are as follows: Interest Maturity 2017 2016 (a) n/a $ 34,416 $ 103,969 (b) 09/06/17 0 15,016 (c) 12/15/17 0 15,093 (d) 09/06/18 7,550 17,523 (e) 06/28/19 30,000 0 (f) 09/06/19 11,752 18,360 (g) 09/16/19 8,883 13,865 (h) 06/29/20 30,000 0 (i) 09/08/20 13,859 18,780 (j) 06/28/21 30,000 0 (k) 06/29/22 50,000 0 (l) 09/06/22 15,976 19,201 (m) 12/05/22 20,000 0 (n) 07/03/23 700 700 (o) 09/05/23 1,797 1,925 (p) 03/11/24 814 852 (q) 06/11/24 435 462 (r) 05/04/26 217 240 (s) 10/14/26 231 252 (t) 02/11/33 729 766 $ 257,359 $ 227,004 (a) – Open Repo borrowing at an interest rate of 1.54% at December 31, 2017 and 0.74% at December 31, 2016. The maximum amount of the Open Repo borrowing available is $150,000. (b) – Fixed rate borrowing at an interest rate of 0.83%, with monthly principal and interest payments. (c) – Fixed rate borrowing at an interest rate of 1.25%, with monthly principal and interest payments. (d) – Fixed rate borrowing at an interest rate of 1.05%, with monthly principal and interest payments. (e) – Fixed rate borrowing at interest rate of 1.66%. Interest only payments with principal due at maturity. (f) – Fixed rate borrowing at an interest rate of 1.17%, with monthly principal and interest payments. (g) – Fixed rate borrowing at an interest rate of 1.35%, with monthly principal and interest payments. (h) – Fixed rate borrowing at interest rate of 1.82%. Interest only payments with principal due at maturity. (i) – Fixed rate borrowing at an interest rate of 1.27%, with monthly principal and interest payments. (j) – Fixed rate borrowing at interest rate of 1.97%. Interest only payments with principal due at maturity. (k) – Fixed rate borrowing at interest rate of 1.97%. Interest only payments with principal due at maturity. (l) – Fixed rate borrowing at an interest rate of 1.47%, with monthly principal and interest payments. (m) – Fixed rate borrowing at interest rate of 2.39%. Interest only payments with principal due at maturity. (n) – Fixed rate borrowing at interest rate of 4.72%. Interest only payments with principal due at maturity. (o) – Fixed rate borrowing at an interest rate of 4.31%, with monthly principal and interest payments and a balloon payment due at maturity. (p) – Fixed rate borrowing at an interest rate of 3.05%, with monthly principal and interest payments and a balloon payment due at maturity. (q) – Fixed rate borrowing at an interest rate of 5.24%, with monthly principal and interest payments and a balloon payment due at maturity. (r) – Fixed rate borrowing at an interest rate of 3.35%, with monthly principal and interest payments. (s) – Fixed rate borrowing at an interest rate of 4.00%, with monthly principal and interest payments. (t) – Fixed rate borrowing at an interest rate of 2.96%, with monthly principal and interest payments.
Maturity Schedule of All Borrowed Funds	The following is a schedule of maturities of all borrowed funds as of December 31, 2017: 2018 $ 62,242 2019 47,562 2020 37,505 2021 33,740 2022 72,931 Thereafter 73,999 Total borrowed funds $ 327,979

Interest Rate Swaps (Tables)

Interest Rate Swaps (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amounts and Locations of Activity Related to Interest Rate Swaps Designated as Cash Flow Hedges within Corporation's Consolidated Balance Sheet and Statement of Income	The following tables provide information about the amounts and locations of activity related to the interest rate swaps designated as cash flow hedges within the Corporation’s consolidated balance sheet and statement of income as of December 31, 2017 and 2016 and for the years ended December 31, 2017, 2016, and 2015: As of December 31 Liability Derivative Balance Sheet Fair value Location 2017 2016 Interest rate contract Accrued interest payable and other liabilities ($161) ($459) For the Year Ended December 31, 2017 (a) (b) (c) (d) (e) Interest rate contract $194 Interest expense – subordinated debentures ($288) Other $0 For the Year Ended December 31, 2016 Interest rate contract $180 Interest expense – subordinated debentures ($340) Other $0 For the Year Ended December 31, 2015 Interest rate contract $137 Interest expense – subordinated debentures ($378) Other $0 (a) Amount of Gain Recognized in Other Comprehensive Loss on Derivative (Effective Portion), net of tax (b) Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion) (c) Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion) (d) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) (e) Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Amounts and Locations of Activity Related to Back-to-Back Interest Rate Swaps within Corporation's Consolidated Balance Sheet	The following table provides information about the amounts and locations of activity related to the back-to-back interest rate swaps within the Corporation’s consolidated balance sheet as of December 31, 2017 and 2016: Notional Average Weighted Weighted Average Variable Rate Fair December 31, 2017 3 rd Party interest rate swaps $ 11,848 8.0 4.51 % 1 month LIBOR + 2.37% $ 149 (a) Customer interest rate swaps (11,848 ) 8.0 4.51 % 1 month LIBOR + 2.37% (149) (b) December 31, 2016 3 rd Party interest rate swaps $ 14,814 9.7 4.43 % 1 month LIBOR + 2.35% $ 211 (a) Customer interest rate swaps (14,814 ) 9.7 4.43 % 1 month LIBOR + 2.35% (211) (b) (a) Reported in accrued interest receivable and other assets within the consolidated balance sheets (b) Reported in accrued interest payable and other liabilities within the consolidated balance sheets

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Summary of Income Tax Expense	The following is a summary of income tax expense for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Current – federal $ 8,978 $ 6,181 $ 7,777 Current – state 29 (33 ) 139 Deferred – federal 376 1,023 376 Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate 3,009 0 0 Income tax expense $ 12,392 $ 7,171 $ 8,292
Reconciliation of Income Tax Attributable to Pre-Tax Income at Federal Statutory Tax Rates to Income Tax Expense	The reconciliation of income tax attributable to pre-tax income at the federal statutory tax rates to income tax expense is as follows: 2017 % 2016 % 2015 % Tax at statutory rate $ 12,688 35.0 $ 9,699 35.0 $ 10,671 35.0 Tax exempt income, net (1,899 ) (5.2 ) (2,054 ) (7.4 ) (1,816 ) (6.0 ) Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate 3,009 8.3 0 0.00 0 0.0 Bank owned life insurance (581 ) (1.6 ) (379 ) (1.3 ) (418 ) (1.4 ) Merger costs 0 0.0 170 0.6 30 0.1 Other (825 ) (2.3 ) (265 ) (1.0 ) (175 ) (0.5 ) Income tax expense $ 12,392 34.2 $ 7,171 25.9 $ 8,292 27.2
Components of Net Deferred Tax Asset	2017 2016 Deferred tax assets: Allowance for loan losses $ 2,840 $ 4,679 Fair value adjustments – business combination 1,135 2,530 Deferred compensation 1,903 2,891 Impaired security valuation 0 379 Net operating loss carryover 71 627 Post-retirement benefits 892 1,688 Unrealized loss on interest rate swap 34 161 Nonaccrual loan interest 390 649 Accrued expenses 699 1,282 Deferred fees and costs 598 629 Other 344 465 8,906 15,980 Deferred tax liabilities: Unrealized gain on securities available for sale 126 750 Premises and equipment 1,413 2,258 Unrealized gain on trading securities 156 118 Intangibles – section 197 2,593 4,735 Mortgage servicing rights 291 487 Other 78 23 4,657 8,371 Net deferred tax asset $ 4,249 $ 7,609

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Unfunded Post Retirement Benefits Plan	The following table sets forth the change in the benefit obligation of the plan as of and for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Benefit obligation at beginning of year $ 3,409 $ 3,066 $ 2,744 Interest cost 114 108 90 Service cost 103 103 96 Actual claims (78 ) (151 ) (109 ) Actuarial (gain) loss (808 ) 283 245 Benefit obligation at end of year $ 2,740 $ 3,409 $ 3,066
Accumulated Other Comprehensive Income	Amounts recognized in accumulated other comprehensive income at December 31, 2017 and 2016 consist of: 2017 2016 Net actuarial loss $ (871 ) $ (1,871 ) Tax effect 183 654 $ (688 ) $ (1,217 )
Recognized Net Periodic Benefit Cost and Other Comprehensive Income	The following table sets forth the components of net periodic benefit cost and other amounts recognized in other comprehensive income: 2017 2016 2015 Service cost $ 103 $ 103 $ 96 Interest cost 114 108 90 Net amortization of transition obligation and actuarial loss 192 184 173 Net periodic benefit cost 409 395 359 Net (gain) loss (808 ) 282 311 Amortization of loss (192 ) (184 ) (173 ) Total recognized in other comprehensive income (1,000 ) 98 138 Total recognized in net periodic benefit cost and other comprehensive income $ (591 ) $ 493 $ 497

Deferred Compensation Plans (Ta

Deferred Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Postemployment Benefits [Abstract]
Summary of Changes in Deferred Compensation Plan Liability	A summary of changes in the deferred compensation plan liability follows: 2017 2016 2015 Balance, beginning of year $ 2,080 $ 1,226 $ 1,087 Deferrals, dividends, and changes in fair value recorded as an expense 444 936 209 Deferred compensation payments (21 ) (82 ) (70 ) Balance, end of year $ 2,503 $ 2,080 $ 1,226

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Changes in Nonvested Restricted Stock Awards	A summary of changes in nonvested restricted stock awards follows: Shares Weighted-average Fair Value Nonvested at January 1, 2017 100,726 $17.36 Granted 39,673 25.94 Forfeited (2,482 ) 21.12 Vested (43,445 ) 17.54 Nonvested at December 31, 2017 94,472 $20.79

Capital Requirements and Rest48

Capital Requirements and Restrictions on Retained Earnings (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Summary of Actual and Required Capital Amounts and Ratios	Actual and required capital amounts and ratios are presented below as of December 31, 2017 and 2016. The capital adequacy ratio includes the capital conservation buffer. Actual For Capital To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio December 31, 2017 Total Capital to Risk Weighted Assets Consolidated $297,708 14.32 % $192,341 9.25% N/A Bank $279,704 13.58 % $190,513 9.25% $205,960 10.00% Tier 1 (Core) Capital to Risk Weighted Assets Consolidated $228,015 10.97 % $150,754 7.25% N/A Bank $261,643 12.70 % $149,321 7.25% $164,768 8.00% Common equity Tier 1 to Risk Weighted Assets Consolidated $208,015 10.00 % $119,563 5.75% N/A Bank $254,264 12.35 % $118,427 5.75% $133,874 6.50% Tier 1 (Core) Capital to Average Assets Consolidated $228,015 8.45 % $107,969 4.00% N/A Bank $261,643 9.80 % $106,798 4.00% $133,498 5.00% December 31, 2016 Total Capital to Risk Weighted Assets Consolidated $261,530 14.05 % $160,501 8.625% N/A Bank $242,592 13.19 % $158,590 8.625% $183,873 10.00% Tier 1 (Core) Capital to Risk Weighted Assets Consolidated $195,200 10.49 % $123,283 6.625% N/A Bank $228,109 12.41 % $121,816 6.625% $147,098 8.00% Common equity Tier 1 to Risk Weighted Assets Consolidated $175,200 9.41 % $95,370 5.125% N/A Bank $220,730 12.00 % $94,235 5.125% $119,517 6.50% Tier 1 (Core) Capital to Average Assets Consolidated $195,200 7.85 % $99,430 4.00% N/A Bank $228,109 9.36 % $97,527 4.00% $121,909 5.00%

Off Balance Sheet Activities (T

Off Balance Sheet Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Schedule of Off-Balance Sheet Risks	The contractual amount of financial instruments with off-balance sheet risk was as follows at December 31, 2017 and 2016: 2017 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $64,799 $210,987 $57,283 $202,883 Unused lines of credit 0 118,348 0 105,779 Standby letters of credit 0 14,985 0 4,618

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are as follows at December 31, 2017 and 2016: Fair Value Measurements at December 31, 2017 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Securities Available For Sale: U.S. Government sponsored entities $ 108,148 $ 0 $ 108,148 $ 0 States and political subdivisions 137,723 0 137,723 0 Residential and multi-family mortgage 109,636 0 109,636 0 Corporate notes and bonds 17,200 0 17,200 0 Pooled SBA 36,040 0 36,040 0 Other equity securities 962 962 0 0 Total Securities Available For Sale $ 409,709 $ 962 $ 408,747 $ 0 Interest Rate swaps: $ 149 $ 0 $ 149 $ 0 Trading Securities: Corporate equity securities $ 5,125 $ 5,125 $ 0 $ 0 Mutual funds 1,499 1,499 0 0 Certificates of deposit 220 220 0 0 Corporate notes and bonds 254 254 0 0 U.S. Government sponsored entities 52 0 52 0 Total Trading Securities $ 7,150 $ 7,098 $ 52 $ 0 Liabilities Interest rate swaps $ (310 ) $ 0 $ (310 ) $ 0 Fair Value Measurements at December 31, 2016 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Securities Available For Sale: U.S. Government sponsored entities $ 140,351 $ 0 $ 140,351 $ 0 States and political subdivisions 157,037 0 157,037 0 Residential and multi-family mortgage 134,976 0 134,976 0 Corporate notes and bonds 17,414 0 17,414 0 Pooled trust preferred 2,049 0 0 2,049 Pooled SBA 43,037 0 43,037 0 Other equity securities 971 971 0 0 Total Securities Available For Sale $ 495,835 $ 971 $ 492,815 $ 2,049 Interest Rate swaps: $ 211 $ 0 $ 211 $ 0 Trading Securities: Corporate equity securities $ 3,312 $ 3,312 $ 0 $ 0 Mutual funds 1,037 1,037 0 0 Certificates of deposit 202 202 0 0 Corporate notes and bonds 254 254 0 0 U.S. Government sponsored entities 53 0 53 0 Total Trading Securities $ 4,858 $ 4,805 $ 53 $ 0 Liabilities Interest rate swaps $ (670 ) $ 0 $ (670 ) $ 0
Securities Available for Sale Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)	The table below presents a reconciliation and income statement classification of gains and losses for all securities available for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2017: Pooled Balance, January 1, 2017 $ 2,049 Total gains or (losses): Included in other comprehensive income (loss) 134 Sale of available-for-sale securities (2,183 ) Balance, December 31, 2017 $ 0 The table below presents a reconciliation and income statement classification of gains and losses for all securities available for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2016: Pooled Balance, January 1, 2016 $ 3,413 Total gains or (losses): Included in other comprehensive income (loss) (442 ) Included in realized gains on available-for-sale securities 0 Sale of available-for-sale securities (922 ) Balance, December 31, 2016 $ 2,049
Quantitative Information about Level 3 Fair Value Measurements	The following table presents quantitative information about Level 3 fair value measurements at December 31, 2016: Fair Valuation Unobservable Input Utilized Pooled trust preferred $2,049 Discounted cash flow Collateral default rate Yield 0.5% in 2016 and thereafter 10% Prepayment speed 2.0% constant prepayment rate in 2016 and thereafter
Assets and Liabilities Measured at Fair Value on Non-Recurring Basis	Assets and liabilities measured at fair value on a non-recurring basis are as follows at December 31, 2017 and 2016: Fair Value Measurements at December 31, 2017 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Impaired loans: Commercial mortgages $ 11 0 0 $ 11 Fair Value Measurements at December 31, 2016 Using Description Total Quoted Prices in Significant Other Significant (Level 3) Assets: Impaired loans: Commercial mortgages $ 2,067 0 0 $ 2,067
Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Non Recurring Basis	The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2017: Fair Valuation Unobservable Inputs Range Impaired loans – commercial mortgages $ 11 Discounted cash flow method Discount used in discounted cash flow method 10% (10%) The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2016: Fair Valuation Unobservable Inputs Range (Weighted Impaired loans – commercial mortgages $ 2,067 Sales comparison approach and discounted cash flow method Adjustment for differences between the comparable sales and discount used in discounted cash flows 10% – 14% (13%)
Carrying Amount and Fair Value of Financial Instruments	The following table presents the carrying amount and fair value of financial instruments at December 31, 2017: Carrying Amount Fair Value Measurement Using: Total Fair Value Level 1 Level 2 Level 3 ASSETS Cash and cash equivalents $ 35,345 $ 35,345 $ 0 $ 0 $ 35,345 Securities available for sale 409,709 962 408,747 0 409,709 Trading securities 7,150 7,098 52 0 7,150 Loans held for sale 852 0 853 0 853 Net loans 2,126,266 0 0 2,126,824 2,126,824 FHLB and other equity interests 21,517 n/a n/a n/a n/a Interest rate swaps 149 0 149 0 149 Accrued interest receivable 9,254 6 2,651 6,597 9,254 LIABILITIES Deposits $ (2,167,815 ) $ (1,802,844 ) $ (362,756 ) $ 0 $ (2,165,600 ) FHLB and other borrowings (257,359 ) 0 (257,361 ) 0 (257,361 ) Subordinated debentures (70,620 ) 0 (63,575 ) 0 (63,575 ) Deposits held for sale 0 0 0 0 0 Interest rate swaps (310 ) 0 (310 ) 0 (310 ) Accrued interest payable (554 ) 0 (554 ) (0 ) (554 ) The following table presents the carrying amount and fair value of financial instruments at December 31, 2016: Carrying Amount Fair Value Measurement Using: Total Fair Value Level 1 Level 2 Level 3 ASSETS Cash and cash equivalents $ 29,183 $ 29,183 $ 0 $ 0 $ 29,183 Securities available for sale 495,835 971 492,815 2,049 495,835 Trading securities 4,858 4,805 53 0 4,858 Loans held for sale 7,528 0 7,553 0 7,553 Net loans 1,857,206 0 0 1,817,341 1,817,341 FHLB and other equity interests 19,186 n/a n/a n/a n/a Interest rate swaps 211 0 211 0 211 Accrued interest receivable 8,264 6 3,014 5,244 8,264 LIABILITIES Deposits $ (2,017,522 ) $ (1,785,649 ) $ (219,765 ) $ 0 $ (2,005,414 ) FHLB and other borrowings (237,004 ) 0 (226,769 ) 0 (226,769 ) Subordinated debentures (70,620 ) 0 (61,831 ) 0 (61,831 ) Deposits held for sale (6,456 ) 0 (6,417 ) 0 (6,417 ) Interest rate swaps (670 ) 0 (670 ) 0 (670 ) Accrued interest payable (510 ) 0 (510 ) 0 (510 )

Parent Company Only Financial51

Parent Company Only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets	CONDENSED BALANCE SHEETS December 31, 2017 2016 Assets Cash $ 1,556 $ 1,436 Trading securities 580 529 Investment in bank subsidiary 290,156 257,476 Investment in non-bank subsidiaries 21,781 23,324 Deferreds and Current Receivable 2,055 1,066 Other assets 2,059 2,666 Total assets $ 318,187 $ 286,497 Liabilities Borrowings from subsidiary $ 1,400 $ 1,400 Subordinated debentures 70,620 70,620 Other liabilities 2,257 2,693 Total liabilities 74,277 74,713 Total shareholders’ equity 243,910 201,913 Total liabilities and shareholders’ equity $ 318,187 $ 286,497
Condensed Statements of Income	CONDENSED STATEMENTS OF INCOME Year Ended December 31, Income: 2017 2016 2015 Dividends from: Bank subsidiary $ 8,840 $ 8,700 $ 10,404 Non-bank subsidiaries 2,250 1,200 323 Other 220 230 157 Total income 11,310 10,130 10,884 Expenses (4,957 ) (2,611 ) (1,708 ) Income before income taxes and equity in undistributed net income of subsidiaries: 6,353 7,519 9,176 Income tax benefit 1,614 813 547 Equity in undistributed net income of bank subsidiary 17,430 13,184 11,889 Distributions in excess of net income of non-bank subsidiaries (1,537 ) (976 ) 585 Net income $ 23,860 $ 20,540 $ 22,197
Condensed Statements of Cash Flows	CONDENSED STATEMENTS OF CASH FLOWS Year Ended December 31, 2017 2016 2015 Net income Adjustments to reconcile net income to net cash provided by $ 23,860 $ 20,540 $ 22,197 operating activities: Equity in undistributed net income of bank subsidiary (17,430 ) (13,184 ) (11,889 ) Equity in undistributed net income (distributions in excess of net income) of non-bank subsidiaries 1,537 976 (585 ) Net unrealized gains on trading securities (12 ) (58 ) (11 ) Decrease (increase) in other assets (549 ) (1,277 ) 9 (Decrease) increase in other liabilities 791 1,645 663 Net cash provided by operating activities 8,197 8,642 10,384 Cash flows from investing activities Investment in bank subsidiaries (15,400 ) (49,223 ) 0 Net cash used in investing activities (15,400 ) (49,223 ) 0 Cash flows from financing activities: Dividends paid (10,094 ) (9,546 ) (9,515 ) Proceeds from issuance of long term debt 0 50,000 0 Purchase of treasury stock (1,877 ) (44 ) (868 ) Net proceeds from issuance of common stock 19,294 0 0 Net advance from subsidiary 0 50 0 Net cash provided by (used in) financing activities 7,323 40,460 (10,383 ) Net increase (decrease) in cash 120 (121 ) 1 Cash beginning of year 1,436 1,557 1,556 Cash end of year $ 1,556 $ 1,436 $ 1,557

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Components of Other Comprehensive Income and Related Tax Effects	Other comprehensive income components and related tax effects were as follows for the years ended December 31, 2017, 2016, and 2015: 2017 2016 2015 Unrealized holding losses on available for sale securities $ (136 ) $ (1,838 ) $ (623 ) Less reclassification adjustment for gains recognized in earnings (160 ) (83 ) (666 ) Net unrealized losses (296 ) (1,921 ) (1,289 ) Tax effect 104 672 452 Net-of-tax amount (192 ) (1,249 ) (837 ) Unrealized holding gains on available for sale securities for which a portion of an other-than-temporary impairment has been recognized in earnings 134 (442 ) 2,508 Less reclassification adjustment for gains recognized in earnings (1,383 ) (922 ) 0 Net unrealized gains (1,249 ) (1,364 ) 2,508 Tax effect 437 477 (878 ) Net-of-tax amount (812 ) (887 ) 1,630 Actuarial gain (loss) on postemployment health care plan 808 (282 ) (311 ) Net amortization of transition obligation and actuarial gain 192 184 173 Net unrealized gain (loss) on postemployment health care plan 1,000 (98 ) (138 ) Tax effect (175 ) 34 48 Net-of-tax amount 825 (64 ) (90 ) Unrealized gain (loss) on interest rate swap 10 (63 ) (168 ) Less reclassification adjustment for losses recognized in earnings 288 340 378 Net unrealized gain 298 277 210 Tax effect (104 ) (97 ) (73 ) Net-of-tax amount 194 180 137 Other comprehensive income (loss) $ 15 $ (2,020 ) $ 840
Summary of Change in Accumulated Other Comprehensive Income (Loss)	The following is a summary of the change in the accumulated other comprehensive income (loss) balance, net of tax, for the years ended December 31, 2017, 2016, and 2015. Balance Comprehensive Reclassification of Balance 12/31/16 Income (Loss) Tax Effect 12/31/17 Unrealized gains (losses) on securities available for sale $ 1,393 $ (1,004 ) $ 84 $ 473 Unrealized gain (loss) on postretirement benefits plan (1,217 ) 825 (298 ) (690 ) Unrealized loss on interest rate swap (297 ) 194 (23 ) (126 ) Total $ (121 ) $ 15 $ (237 ) $ (343 ) Balance Comprehensive Reclassification of Balance 12/31/15 Income (Loss) Tax Effect 12/31/16 Unrealized gains (losses) on securities available for sale $ 3,529 $ (2,136 ) $ 0 $ 1,393 Unrealized gain (loss) on postretirement benefits plan (1,153 ) (64 ) 0 (1,217 ) Unrealized loss on interest rate swap (477 ) 180 0 (297 ) Total $ 1,899 $ (2,020 ) $ 0 $ (121 ) Balance Comprehensive Reclassification of Balance 1/1/15 Income (Loss) Tax Effect 12/31/15 Unrealized gains (losses) on securities available for sale $ 2,736 $ 793 $ 0 $ 3,529 Unrealized gain (loss) on postretirement benefits plan (1,063 ) (90 ) 0 (1,153 ) Unrealized loss on interest rate swap (614 ) 137 0 (477 ) Total $ 1,059 $ 840 $ 0 $ 1,899

Quarterly Financial Data (Una53

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Results of Operations	The unaudited quarterly results of operations for the years ended December 31, 2017 and 2016 are as follows: Quarters Ended in 2017 Quarters Ended in 2016 Mar. 31 June 30 Sept. 30 Dec. 31 Mar. 31 June 30 Sept. 30 Dec. 31 Total interest and dividend income $ 25,104 $ 27,003 $ 28,069 $ 28,698 $ 22,066 $ 22,473 $ 24,958 $ 24,818 Net interest income 21,202 22,989 23,517 23,801 18,942 19,403 21,933 21,009 Provision for loan losses 1,016 1,134 1,400 3,105 1,196 220 622 2,111 Non-interest income 5,773 5,089 5,032 5,541 3,777 4,819 4,473 4,622 Non-interest expense 17,034 17,797 17,618 17,588 14,814 18,753 17,096 16,455 Net income 6,480 6,683 7,246 3,451 5,019 4,065 6,416 5,040 Net income per share, basic 0.43 0.44 0.47 0.23 0.35 0.28 0.44 0.35 Net income per share, diluted 0.43 0.44 0.47 0.23 0.35 0.28 0.44 0.35

Summary of Significant Accoun54

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Segmentshares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares
Summary Of Significant Accounting Policies [Line Items]
Number of reportable operating segment | Segment	1
Period of delinquent loan	90 days
Advertising costs	$ 2,243,000	$ 1,799,000	$ 1,580,000
Number of nonqualified options or restricted stock for key employees and independent director | shares	500,000
Description of award terms	For key employees, the plan vesting schedule is one-fourth of granted stock-based awards per year beginning one year after the grant date with 100% vested on the fourth anniversary. For independent directors, the vesting schedule is one-third of granted stock-based awards per year beginning one year after the grant date with 100% vested on the third anniversary.
Unrecognized compensation cost related to nonvested stock options granted	$ 0	$ 0
Stock options, granted | shares	0	0	0
Shares granted, restricted common stock | shares	39,673	52,750	48,300
Compensation expense restricted stock awards	$ 928,000	$ 820,000	$ 621,000
Average amount of non interest bearing reserve with federal reserve bank	$ 50,000	$ 50,000
Independent Directors [Member]
Summary Of Significant Accounting Policies [Line Items]
Starting period of vesting of stock based award	1 year
Aggregate percentage of stock based awards to be matured	100.00%
Stock incentive plan, vesting per year	33.33%
Award vesting period	3 years
Key Employees [Member]
Summary Of Significant Accounting Policies [Line Items]
Starting period of vesting of stock based award	1 year
Aggregate percentage of stock based awards to be matured	100.00%
Stock incentive plan, vesting per year	25.00%
Award vesting period	4 years
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of tax benefit realized	50.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Period of Consumer loans charged off	180 days
Premises and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	3 years
Premises and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	39 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	10 years
Buildings and Building Improvements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	15 years
Buildings and Building Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful lives of premises and equipment	39 years
Core Deposit [Member] | FC Banc Corp [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization of intangible assets	7 years
Core Deposit [Member] | Lake National Bank of Mentor, Ohio [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization of intangible assets	4 years

Business Combination and Bran55

Business Combination and Branch Sale - Additional Information (Detail) $ / shares in Units, $ in Thousands	May 19, 2017USD ($)	Dec. 30, 2015USD ($)Location$ / shares	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Jul. 15, 2016USD ($)
Business Acquisition [Line Items]
Merger costs			$ 0	$ 486	$ 308
Deferred tax asset included in accrued interest receivable and other assets			4,249	7,609
Gross loans acquired			126,134
Combined yield and credit mark			3,928
Goodwill arising from Acquisition			38,730	38,730	27,194
Gain from sale of branch			536	0	0
Lake National Bank of Mentor, Ohio [Member]
Business Acquisition [Line Items]
Share price | $ / shares		$ 22.50
Fair value of total consideration transferred		$ 24,750
Number of branch locations | Location		2
Merger costs				$ 486	$ 308
Deferred tax asset included in accrued interest receivable and other assets			58
Goodwill arising from Acquisition			$ 11,536			$ 11,536
First Federal Community Bank [Member]
Business Acquisition [Line Items]
Loans transferred	$ 7,800
Fixed assets	100
Deposits transferred	7,400
Gain from sale of branch	$ 536
Deposit Premium	8.00%

Business Combination and Bran56

Business Combination and Branch Sale - Schedule of Consideration Paid and Amounts of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Jul. 15, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill		$ 38,730	$ 38,730	$ 27,194
Lake National Bank of Mentor, Ohio [Member]
Consideration paid:
Cash	$ 24,750
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents	21,884
Securities available for sale	450
Loans	122,206
FHLB and other equity interests	637
Premises and equipment	3,242
Bank owned life insurance	2,152
Mortgage servicing rights	367
Core deposit intangible	1,583
Accrued interest receivable and other assets	3,110
Total assets acquired	155,631
Demand deposits	81,472
Time deposits	58,311
Accrued interest payable and other liabilities	2,634
Total liabilities assumed	142,417
Total identifiable net assets	13,214
Goodwill	$ 11,536	$ 11,536

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Antidilutive shares excluded from the diluted earnings per share calculations	0	0	0

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ 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 earnings per common share computation
Net income per consolidated statements of income	$ 3,451	$ 7,246	$ 6,683	$ 6,480	$ 5,040	$ 6,416	$ 4,065	$ 5,019	$ 23,860	$ 20,540	$ 22,197
Net earnings allocated to participating securities									(135)	(129)	(117)
Net earnings allocated to common stock									$ 23,725	$ 20,411	$ 22,080
Weighted average common shares outstanding, including shares considered participating securities									15,212	14,457	14,408
Less: Average participating securities									(80)	(82)	(70)
Weighted average shares									15,132	14,375	14,338
Basic earnings per common share	$ 0.23	$ 0.47	$ 0.44	$ 0.43	$ 0.35	$ 0.44	$ 0.28	$ 0.35	$ 1.57	$ 1.42	$ 1.54
Diluted earnings per common share computation
Net earnings allocated to common stock									$ 23,725	$ 20,411	$ 22,080
Weighted average common shares outstanding for basic earnings per common share									15,132	14,375	14,338
Add: Dilutive effects of assumed exercises of stock options									0	0	0
Weighted average shares and dilutive potential common shares									15,132	14,375	14,338
Diluted earnings per common share	$ 0.23	$ 0.47	$ 0.44	$ 0.43	$ 0.35	$ 0.44	$ 0.28	$ 0.35	$ 1.57	$ 1.42	$ 1.54
Distributed Earnings Allocated to Common Stock [Member]
Basic earnings per common share computation
Net earnings allocated to common stock									$ 10,030	$ 9,480	$ 9,460
Undistributed Earnings Allocated to Common Stock [Member]
Basic earnings per common share computation
Net earnings allocated to common stock									$ 13,695	$ 10,931	$ 12,620

Securities - Securities Availab

Securities - Securities Available for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 409,110	$ 493,691
Unrealized Gains	4,798	7,683
Unrealized Losses	(4,199)	(5,539)
Fair Value	409,709	495,835
U.S. Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	108,578	139,823
Unrealized Gains	478	1,107
Unrealized Losses	(908)	(579)
Fair Value	108,148	140,351
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	134,428	153,492
Unrealized Gains	3,609	4,194
Unrealized Losses	(314)	(649)
Fair Value	137,723	157,037
Residential and Multi-Family Mortgage [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	111,214	136,807
Unrealized Gains	304	551
Unrealized Losses	(1,882)	(2,382)
Fair Value	109,636	134,976
Corporate Notes and Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,610	18,299
Unrealized Gains	52	77
Unrealized Losses	(462)	(962)
Fair Value	17,200	17,414
Pooled Trust Preferred [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	800
Unrealized Gains	0	1,249
Unrealized Losses	0	0
Fair Value	0	2,049
Pooled SBA [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	36,260	43,450
Unrealized Gains	355	505
Unrealized Losses	(575)	(918)
Fair Value	36,040	43,037
Other Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,020	1,020
Unrealized Gains	0	0
Unrealized Losses	(58)	(49)
Fair Value	$ 962	$ 971

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Securities	Dec. 31, 2016USD ($)Securities	Dec. 31, 2015USD ($)
Schedule of Available-for-sale Securities [Line Items]
Number of securities holdings | Securities	0	0
Shareholders' equity percentage	10.00%	10.00%
Securities	$ 319,575	$ 329,379
Tax provision related to net realized gains	540	352	$ 233
Proceeds from sale of trading securities	1,091	540	2,129
Net realized (losses) gains on trading securities	93	70	$ (211)
Pooled Trust Preferred [Member]
Schedule of Available-for-sale Securities [Line Items]
Pooled trust preferred securities sold	800	0
Net realized (losses) gains on trading securities	$ 1,383	$ 922

Securities - Trading Securities

Securities - Trading Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	$ 7,150	$ 4,858
Corporate Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	5,125	3,312
Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	1,499	1,037
Corporate Notes and Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	254	254
U.S. Government Sponsored Entities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	52	53
Certificates of Deposit [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	$ 220	$ 202

Securities - Securities with Un

Securities - Securities with Unrealized Losses Aggregated by Investment Category and Length of Time that Individual Securities have been in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 106,735	$ 196,901
Less than 12 Months, Unrealized Loss	(771)	(2,419)
12 Months or More, Fair Value	134,831	64,882
12 Months or More, Unrealized Loss	(3,428)	(3,120)
Total, Fair Value	241,566	261,783
Total, Unrealized Loss	(4,199)	(5,539)
U.S. Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	55,696	90,380
Less than 12 Months, Unrealized Loss	(540)	(579)
12 Months or More, Fair Value	34,754	0
12 Months or More, Unrealized Loss	(368)	0
Total, Fair Value	90,450	90,380
Total, Unrealized Loss	(908)	(579)
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	15,890	32,353
Less than 12 Months, Unrealized Loss	(69)	(448)
12 Months or More, Fair Value	4,104	264
12 Months or More, Unrealized Loss	(245)	(201)
Total, Fair Value	19,994	32,617
Total, Unrealized Loss	(314)	(649)
Residential and Multi-Family Mortgage [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	30,144	65,598
Less than 12 Months, Unrealized Loss	(153)	(1,255)
12 Months or More, Fair Value	63,699	34,611
12 Months or More, Unrealized Loss	(1,729)	(1,127)
Total, Fair Value	93,843	100,209
Total, Unrealized Loss	(1,882)	(2,382)
Corporate Notes and Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	5,005	2,089
Less than 12 Months, Unrealized Loss	(9)	(11)
12 Months or More, Fair Value	9,042	8,476
12 Months or More, Unrealized Loss	(453)	(951)
Total, Fair Value	14,047	10,565
Total, Unrealized Loss	(462)	(962)
Pooled SBA [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	6,481
Less than 12 Months, Unrealized Loss	0	(126)
12 Months or More, Fair Value	22,270	20,560
12 Months or More, Unrealized Loss	(575)	(792)
Total, Fair Value	22,270	27,041
Total, Unrealized Loss	(575)	(918)
Other Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Loss	0	0
12 Months or More, Fair Value	962	971
12 Months or More, Unrealized Loss	(58)	(49)
Total, Fair Value	962	971
Total, Unrealized Loss	$ (58)	$ (49)

Securities - Roll-Forward of Ot

Securities - Roll-Forward of Other-Than-Temporary Impairment Amount Related to Credit Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Marketable Securities [Abstract]
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in earnings, beginning of period	$ 2,071	$ 4,054	$ 4,054
Credit losses previously recognized on securities sold during the period	(2,071)	(1,983)	0
Additional credit loss for which other-than-temporary impairment was not previously recognized	0	0	0
Additional credit loss for which other-than-temporary impairment was previously recognized	0	0	0
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in earnings, end of period	$ 0	$ 2,071	$ 4,054

Securities - Schedule of Contra

Securities - Schedule of Contractual Maturity of Securities Available for Sale, Excluding Equity Securities (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
1 year or less, Amortized Cost	$ 50,368
1 year - 5 years, Amortized Cost	153,512
5 years - 10 years, Amortized Cost	50,552
After 10 years, Amortized Cost	6,184
Total, Amortized Cost	260,616
1 year or less, Fair Value	50,139
1 year - 5 years, Fair Value	155,075
5 years - 10 years, Fair Value	51,753
After 10 years, Fair Value	6,104
Total, Fair Value	263,071
Total debt securities, Amortized Cost	408,090
Total debt securities, Fair Value	408,747
Residential and Multi-Family Mortgage [Member]
Schedule of Available-for-sale Securities [Line Items]
Mortgage & asset backed securities, Amortized Cost	111,214
Mortgage & asset backed securities, Fair Value	109,636
Pooled SBA [Member]
Schedule of Available-for-sale Securities [Line Items]
Mortgage & asset backed securities, Amortized Cost	36,260
Mortgage & asset backed securities, Fair Value	$ 36,040

Securities - Information Pertai

Securities - Information Pertaining to Security Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 16,340	$ 4,420	$ 105,066
Gross Gains	1,614	1,005	1,032
Gross Losses	$ 71	$ 0	$ 366

Loans - Schedule of Net Loans (

Loans - Schedule of Net Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loan Portfolio By Loan Grade [Line Items]
Commercial, industrial, and agricultural	$ 749,138	$ 567,800
Commercial mortgages	600,065	574,826
Residential real estate	713,347	652,883
Credit cards	6,753	6,046
Overdrafts	352	595
Less: unearned discount	(3,889)	(3,430)
Less: allowance for loan losses	(19,693)	(16,330)
Net loans	2,126,266	1,857,206
Consumer Portfolio Segment [Member]
Loan Portfolio By Loan Grade [Line Items]
Consumer	$ 80,193	$ 74,816

Loans - Additional Information

Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Loans	Dec. 31, 2016USD ($)Loans	Dec. 31, 2015USD ($)Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net unamortized loan (fees) costs	$ (2,574,000)	$ (1,507,000)
Percentage of comprised loan, commercial, industrial and agricultural loans	35.00%	30.00%
Percentage of comprised loan, commercial mortgage loans	28.00%	31.00%
Percentage of loan-to-value to business equipment	80.00%
Percentage of loan-to-value to accounts receivable	75.00%
Percentage of loan-to-value to business inventory	60.00%
Percentage of loan-to-value to real estate	85.00%
Percentage of residential real estate loan in portfolio	33.00%	35.00%
Allowance for loan losses, period increase (decrease)	$ 4,024,000	$ 0	$ 0
Minimum period to be considered for loan to have defaulted	90 days
Principal balances forgiven in connection with loan restructuring	$ 0	0
Loans modified in a troubled debt restructuring	$ 17,303,000	$ 11,831,000
Number of Loans | Loans	19	15
Charge-offs	$ 4,077,000	$ 4,961,000	$ 3,718,000
Outstanding balance of semi annual loans	Greater than $1 million
Outstanding balance of annual loans	Less than $1 million
Trouble Debt Restructuring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | Loans	6	1	1
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of consumer loan and credit card in portfolio	10.00%	10.00%
Reduction in stated interest rate modification having loan range period	15 years
Extension of maturity date modification having loan range period	18 years
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reduction in stated interest rate modification having loan range period	4 years
Extension of maturity date modification having loan range period	4 years
Commercial and Industrial [Member] | Trouble Debt Restructuring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified in a troubled debt restructuring	$ 2,750,000	$ 109,000	$ 1,327,000
Number of Loans | Loans	4	1	1
Additional provision for loan losses	$ 129,000	$ 0	$ 0
Charge-offs	0	0	0
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified in a troubled debt restructuring	$ 12,090,000	$ 9,191,000
Number of Loans | Loans	9	8
Charge-offs	$ 116,000	$ 201,000	$ 486,000
Commercial Mortgages [Member] | Trouble Debt Restructuring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified in a troubled debt restructuring	$ 6,421,000
Number of Loans | Loans	2	0	0
Additional provision for loan losses	$ 3,895,000
Charge-offs	$ 0

Loans - Allowance for Loan Loss

Loans - Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				$ 16,330				$ 16,737	$ 16,330	$ 16,737	$ 17,373
Charge-offs									(4,077)	(4,961)	(3,718)
Recoveries									785	405	522
Provision for loan losses	$ 3,105	$ 1,400	$ 1,134	1,016	$ 2,111	$ 622	$ 220	1,196	6,655	4,149	2,560
Allowance for loan losses, Ending Balance	19,693				16,330				19,693	16,330	16,737
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				5,428				6,035	5,428	6,035	7,114
Charge-offs									(544)	(601)	(307)
Recoveries									235	89	267
Provision for loan losses									1,041	(95)	(1,039)
Allowance for loan losses, Ending Balance	6,160				5,428				6,160	5,428	6,035
Commercial Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				6,753				5,605	6,753	5,605	5,310
Charge-offs									(116)	(201)	(486)
Recoveries									197	8	52
Provision for loan losses									2,173	1,341	729
Allowance for loan losses, Ending Balance	9,007				6,753				9,007	6,753	5,605
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				1,653				2,475	1,653	2,475	2,479
Charge-offs									(466)	(499)	(632)
Recoveries									78	93	8
Provision for loan losses									768	(416)	620
Allowance for loan losses, Ending Balance	2,033				1,653				2,033	1,653	2,475
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				2,215				2,371	2,215	2,371	2,205
Charge-offs									(2,555)	(3,324)	(1,956)
Recoveries									161	122	96
Provision for loan losses									2,358	3,046	2,026
Allowance for loan losses, Ending Balance	2,179				2,215				2,179	2,215	2,371
Credit Cards [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				93				90	93	90	71
Charge-offs									(144)	(96)	(116)
Recoveries									27	22	14
Provision for loan losses									144	77	121
Allowance for loan losses, Ending Balance	120				93				120	93	90
Overdrafts [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, Beginning Balance				$ 188				$ 161	188	161	194
Charge-offs									(252)	(240)	(221)
Recoveries									87	71	85
Provision for loan losses									171	196	103
Allowance for loan losses, Ending Balance	$ 194				$ 188				$ 194	$ 188	$ 161

Loans - Allowance for Loan Lo69

Loans - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	$ 47	$ 1,184
Allowance for loan losses, Collectively evaluated for impairment	13,957	12,807
Allowance for loan losses, Modified in a troubled debt restructuring	5,689	2,339
Acquired with deteriorated credit quality	19,693	16,330	$ 16,737	$ 17,373
Loans:
Loans individually evaluated for impairment	1,238	6,951
Loans collectively evaluated for impairment	2,130,228	1,856,452
Acquired with deteriorated credit quality	1,349,203	1,142,626
Loans modified in a troubled debt restructuring	17,303	11,831
Total ending loans balance	2,149,848	1,876,966
Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	1,079	1,732
Commercial, Industrial, and Agricultural [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	47	188
Allowance for loan losses, Collectively evaluated for impairment	5,868	5,115
Allowance for loan losses, Modified in a troubled debt restructuring	245	125
Acquired with deteriorated credit quality	6,160	5,428	6,035	7,114
Loans:
Loans individually evaluated for impairment	1,187	775
Loans collectively evaluated for impairment	742,738	564,180
Acquired with deteriorated credit quality	749,138	567,800
Loans modified in a troubled debt restructuring	5,213	2,640
Total ending loans balance	749,138	567,800
Commercial, Industrial, and Agricultural [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	0	205
Commercial Mortgages [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	0	996
Allowance for loan losses, Collectively evaluated for impairment	3,563	3,543
Allowance for loan losses, Modified in a troubled debt restructuring	5,444	2,214
Acquired with deteriorated credit quality	9,007	6,753	5,605	5,310
Loans:
Loans individually evaluated for impairment	51	6,176
Loans collectively evaluated for impairment	586,845	557,932
Acquired with deteriorated credit quality	600,065	574,826
Loans modified in a troubled debt restructuring	12,090	9,191
Total ending loans balance	600,065	574,826
Commercial Mortgages [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	1,079	1,527
Residential Real Estate [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	0	0
Allowance for loan losses, Collectively evaluated for impairment	2,033	1,653
Allowance for loan losses, Modified in a troubled debt restructuring	0	0
Acquired with deteriorated credit quality	2,033	1,653	2,475	2,479
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	713,347	652,883
Loans modified in a troubled debt restructuring	0	0
Total ending loans balance	713,347	652,883
Residential Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	0	0
Consumer [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	0	0
Allowance for loan losses, Collectively evaluated for impairment	2,179	2,215
Allowance for loan losses, Modified in a troubled debt restructuring	0	0
Acquired with deteriorated credit quality	2,179	2,215	2,371	2,205
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	80,193	74,816
Loans modified in a troubled debt restructuring	0	0
Total ending loans balance	80,193	74,816
Consumer [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	0	0
Credit Cards [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	0	0
Allowance for loan losses, Collectively evaluated for impairment	120	93
Allowance for loan losses, Modified in a troubled debt restructuring	0	0
Acquired with deteriorated credit quality	120	93	90	71
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	6,753	6,046
Loans modified in a troubled debt restructuring	0	0
Total ending loans balance	6,753	6,046
Credit Cards [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	0	0
Overdrafts [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses, Individually evaluated for impairment	0	0
Allowance for loan losses, Collectively evaluated for impairment	194	188
Allowance for loan losses, Modified in a troubled debt restructuring	0	0
Acquired with deteriorated credit quality	194	188	$ 161	$ 194
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	352	595
Loans modified in a troubled debt restructuring	0	0
Total ending loans balance	352	595
Overdrafts [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	$ 0	$ 0

Loans - Loans Individually Eval

Loans - Loans Individually Evaluated for Impairment Including Loans Modified in Troubled Debt Restructurings by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, Total	$ 20,330	$ 20,513
Recorded Investment, Total	18,541	18,782
Allowance for Loan Losses Allocated	5,736	3,523
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, Related Allowance	1,915	1,644
Recorded Investment, Related Allowance	1,915	1,644
Allowance for Loan Losses Allocated	292	313
Unpaid Principal Balance, No Related Allowance	5,264	2,669
Recorded Investment, No Related Allowance	4,485	1,771
Allowance for Loan Losses Allocated, No Related Allowance	0	0
Commercial Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, Related Allowance	9,940	16,200
Recorded Investment, Related Allowance	9,731	15,367
Allowance for Loan Losses Allocated	5,444	3,210
Unpaid Principal Balance, No Related Allowance	3,211	0
Recorded Investment, No Related Allowance	2,410	0
Allowance for Loan Losses Allocated, No Related Allowance	0	0
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, Related Allowance	0	0
Recorded Investment, Related Allowance	0	0
Allowance for Loan Losses Allocated	0	0
Unpaid Principal Balance, No Related Allowance	0	0
Recorded Investment, No Related Allowance	0	0
Allowance for Loan Losses Allocated, No Related Allowance	$ 0	$ 0

Loans - Impaired Financing Rece

Loans - Impaired Financing Receivables with Related and not Related Allowances (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, Total	$ 18,369	$ 15,867	$ 20,931
Interest Income Recognized, Total	660	8	85
Cash Basis Interest Recognized, Total	660	8	85
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, Related Allowance	1,513	2,616	5,667
Interest Income Recognized, Related Allowance	97	2	44
Cash Basis Interest Recognized, Related Allowance	97	2	44
Average Recorded Investment, No Related Allowance	2,438	2,290	1,831
Interest Income Recognized, No Related Allowance	114	0	14
Cash Basis Interest Recognized, No Related Allowance	114	0	14
Commercial Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, Related Allowance	11,944	8,138	8,154
Interest Income Recognized, Related Allowance	327	0	0
Cash Basis Interest Recognized, Related Allowance	327	0	0
Average Recorded Investment, No Related Allowance	2,474	2,773	4,806
Interest Income Recognized, No Related Allowance	122	0	0
Cash Basis Interest Recognized, No Related Allowance	122	0	0
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, Related Allowance	0	50	370
Interest Income Recognized, Related Allowance	0	6	21
Cash Basis Interest Recognized, Related Allowance	0	6	21
Average Recorded Investment, No Related Allowance	0	0	103
Interest Income Recognized, No Related Allowance	0	0	6
Cash Basis Interest Recognized, No Related Allowance	$ 0	$ 0	$ 6

Loans - Nonaccrual Loans and Lo

Loans - Nonaccrual Loans and Loans Past Due over 90 Days Still Accruing Interest by Class of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 19,232	$ 15,329
Past Due Over 90 Days Still on Accrual	477	10
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,869	2,734
Past Due Over 90 Days Still on Accrual	78	0
Commercial Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	11,065	5,996
Past Due Over 90 Days Still on Accrual	0	0
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	5,470	5,600
Past Due Over 90 Days Still on Accrual	338	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	828	999
Past Due Over 90 Days Still on Accrual	17	0
Credit Cards [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Past Due Over 90 Days Still on Accrual	$ 44	$ 10

Loans - Aging of Recorded Inves

Loans - Aging of Recorded Investment in Past Due Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 14,761	$ 14,455
Loans Not Past Due	2,135,087	1,862,511
Total	2,149,848	1,876,966
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,753	5,025
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,457	1,926
Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,551	7,504
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,139	3,151
Loans Not Past Due	744,999	564,649
Total	749,138	567,800
Commercial, Industrial, and Agricultural [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,745	1,558
Commercial, Industrial, and Agricultural [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	646	299
Commercial, Industrial, and Agricultural [Member] | Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	748	1,294
Commercial Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	525	2,075
Loans Not Past Due	599,540	572,751
Total	600,065	574,826
Commercial Mortgages [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	233	559
Commercial Mortgages [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial Mortgages [Member] | Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	292	1,516
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,439	6,602
Loans Not Past Due	704,908	646,281
Total	713,347	652,883
Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,290	2,155
Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,494	737
Residential Real Estate [Member] | Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,655	3,710
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,573	2,512
Loans Not Past Due	78,620	72,304
Total	80,193	74,816
Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	454	648
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	307	890
Consumer [Member] | Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	812	974
Credit Cards [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	85	115
Loans Not Past Due	6,668	5,931
Total	6,753	6,046
Credit Cards [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	31	105
Credit Cards [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	10	0
Credit Cards [Member] | Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	44	10
Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Loans Not Past Due	352	595
Total	352	595
Overdrafts [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Overdrafts [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Overdrafts [Member] | Greater than 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 0	$ 0

Loans - Restructured in Trouble

Loans - Restructured in Troubled Debt (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Loans	Dec. 31, 2016USD ($)Loans
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	19	15
Loan Balance	$ 17,303	$ 11,831
Specific Reserve	$ 5,689	$ 2,339
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	10	7
Loan Balance	$ 5,213	$ 2,640
Specific Reserve	$ 245	$ 125
Commercial Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	9	8
Loan Balance	$ 12,090	$ 9,191
Specific Reserve	$ 5,444	$ 2,214
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	0	0
Loan Balance	$ 0	$ 0
Specific Reserve	$ 0	$ 0
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	0	0
Loan Balance	$ 0	$ 0
Specific Reserve	$ 0	$ 0
Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	0	0
Loan Balance	$ 0	$ 0
Specific Reserve	$ 0	$ 0

Loans - Loans by Class Modified

Loans - Loans by Class Modified as Troubled Debt Restructurings (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Loans	Dec. 31, 2016USD ($)Loans	Dec. 31, 2015USD ($)Loans
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	19	15
Commercial, Industrial, and Agricultural [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	10	7
Commercial Mortgages [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	9	8
Residential Real Estate [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	0	0
Consumer [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	0	0
Credit Cards [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	0	0
Trouble Debt Restructuring [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	6	1	1
Pre-Modification Outstanding Recorded Investment | $	$ 9,171	$ 109	$ 1,327
Post-Modification Outstanding Recorded Investment | $	$ 9,171	$ 109	$ 1,327
Trouble Debt Restructuring [Member] | Commercial, Industrial, and Agricultural [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	4	1	1
Pre-Modification Outstanding Recorded Investment | $	$ 2,750	$ 109	$ 1,327
Post-Modification Outstanding Recorded Investment | $	$ 2,750	$ 109	$ 1,327
Trouble Debt Restructuring [Member] | Commercial Mortgages [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	2	0	0
Pre-Modification Outstanding Recorded Investment | $	$ 6,421	$ 0	$ 0
Post-Modification Outstanding Recorded Investment | $	$ 6,421	$ 0	$ 0
Trouble Debt Restructuring [Member] | Residential Real Estate [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	0	0	0
Pre-Modification Outstanding Recorded Investment | $	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 0	$ 0
Trouble Debt Restructuring [Member] | Consumer [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	0	0	0
Pre-Modification Outstanding Recorded Investment | $	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 0	$ 0
Trouble Debt Restructuring [Member] | Credit Cards [Member]
Schedule Of Financial Receivables [Line Items]
Number of Loans | Loans	0	0	0
Pre-Modification Outstanding Recorded Investment | $	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 0	$ 0

Loans - Schedule of Loan Assign

Loans - Schedule of Loan Assigned Risk Rating within 12 Months of Balance Sheet Date (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	$ 1,349,203	$ 1,142,626
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	749,138	567,800
Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	600,065	574,826
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	1,294,733	1,082,794
Pass [Member] | Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	713,102	531,320
Pass [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	581,631	551,474
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	21,145	16,447
Special Mention [Member] | Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	16,726	14,638
Special Mention [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	4,419	1,809
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	33,325	43,374
Substandard [Member] | Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	19,310	21,831
Substandard [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	14,015	21,543
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	0	11
Doubtful [Member] | Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	0	11
Doubtful [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable recorded investment	$ 0	$ 0

Loans - Recorded Investment in

Loans - Recorded Investment in Residential, Consumer and Credit Card Loans Based on Payment Activity (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Residential real estate	$ 713,347	$ 652,883
Credit cards	6,753	6,046
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Consumer	80,193	74,816
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Residential real estate	707,539	647,283
Credit cards	6,709	6,036
Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Consumer	79,348	73,817
Non-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Residential real estate	5,808	5,600
Credit cards	44	10
Non-Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Consumer	$ 845	$ 999

Loans - Summary of Holiday's Lo

Loans - Summary of Holiday's Loan Portfolio Included in Consumer and Residential Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate	$ 713,347	$ 652,883
Less: unearned discount	(3,889)	(3,430)
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer	80,193	74,816
Holiday Financial Services Corporation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate	0	1,209
Less: unearned discount	(3,889)	(3,430)
Total	19,539	21,805
Holiday Financial Services Corporation [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer	$ 23,428	$ 24,026

Secondary Market Mortgage Act79

Secondary Market Mortgage Activities - Summary of Secondary Market Mortgage Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Mortgage Banking [Abstract]
Loans originated for resale	$ 25,231	$ 31,255	$ 15,171
Proceeds from sales of loans held for sale	24,285	33,045	14,927
Net gains on sales of loans held for sale	545	818	630
Loan servicing fees	$ 563	$ 421	$ 390

Secondary Market Mortgage Act80

Secondary Market Mortgage Activities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Total loans serviced to others	$ 159,208,000	$ 157,073,000
Valuation allowance	$ 0	$ 0	$ 0

Secondary Market Mortgage Act81

Secondary Market Mortgage Activities - Summary of Activity for Capital Mortgage Servicing Rights (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Mortgage Banking [Abstract]
Balance, beginning of year	$ 1,391	$ 962	$ 856
Additions	198	200	380
Servicing rights acquired	0	367	0
Amortization	(202)	(138)	(274)
Balance, end of year	$ 1,387	$ 1,391	$ 962

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 93,359	$ 90,026
Less: accumulated depreciation	42,644	40,504
Premises and equipment, net	50,715	49,522
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	8,147	7,324
Premises and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	53,903	48,563
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	31,238	30,125
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 71	$ 4,014

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Renewal_TermsLease	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Property, Plant and Equipment [Line Items]
Depreciation on premises and equipment	$ 3,811	$ 3,215	$ 2,759
Rental expense, net of rental income	$ 870	773	699
Sale leaseback transaction, lease term	17 years
Sale leaseback transaction, number of automatic renewals | Renewal_Terms	2
Sale leaseback transaction, two automatic lease renewal, period	5 years
Sale leaseback transaction, sale of property, amount	$ 1,200
Sale leaseback transaction, deferred gain	489
Sale leaseback transaction, gain recognized	$ 25	$ 25	$ 22
Facilities [Member]
Property, Plant and Equipment [Line Items]
Non-cancelable operating leases having remaining term less than one year | Lease	19
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Non-cancelable operating leases having remaining term less than one year | Lease	11

Premises and Equipment - Summ84

Premises and Equipment - Summary of Minimum Annual Rental Commitments Under Operating Lease (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Abstract]
2,018	$ 1,167
2,019	1,021
2,020	836
2,021	736
2,022	578
Thereafter	3,530
Total	$ 7,868

Premises and Equipment - Summ85

Premises and Equipment - Summary of Minimum Annual Rental Commitments Under Sale Lease Back (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Abstract]
2,018	$ 105
2,019	105
2,020	105
2,021	105
2,022	105
Thereafter	420
Total	$ 945

Foreclosed Assets - Summary of

Foreclosed Assets - Summary of Foreclosed Assets Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Balance, beginning of year	$ 1,015	$ 654	$ 806
Acquired from Lake National Bank	0	665	0
Additions	630	120	806
Sales (at carrying value)	(935)	(424)	(958)
Balance, end of year	$ 710	$ 1,015	$ 654

Foreclosed Assets - Summary o87

Foreclosed Assets - Summary of Expenses Related to Foreclosed Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Net (gain) loss on sale	$ (208)	$ (134)	$ 3
Operating expenses, net of rental income	366	223	169
Total	$ 158	$ 89	$ 172

Goodwill and Intangible Asset88

Goodwill and Intangible Assets - Summary of Change in the Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Balance, beginning of year	$ 38,730	$ 27,194
Acquired during the year	0	11,536
Balance, end of year	$ 38,730	$ 38,730

Goodwill and Intangible Asset89

Goodwill and Intangible Assets - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Unit	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2013USD ($)
Goodwill [Line Items]
Number of reporting unit | Unit	1
Core Deposit [Member]
Goodwill [Line Items]
Intangible asset				$ 4,834
Amortization expense	$ 662	$ 835	$ 1,008
Net carrying value	899	1,561
Core Deposit [Member] | Lake National Bank of Mentor, Ohio [Member]
Goodwill [Line Items]
Intangible asset		1,583
Amortization expense	567	290
Net carrying value	$ 726	$ 1,293

Goodwill and Intangible Asset90

Goodwill and Intangible Assets - Estimated Amortization Expense of Core Deposit Intangible Assets (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 898
2,019	567
2,020	160
2,021	0
2,022	$ 0

Deposits - Summary of Time Cert

Deposits - Summary of Time Certificates of Deposit Accounts Included in Total Deposits and Their Remaining Maturities (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Deposits [Abstract]
2,018	$ 125,809
2,019	128,602
2,020	91,799
2,021	7,954
2,022	6,881
Thereafter	3,926
Total	$ 364,971

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Certificates of deposit of $250 thousand or more	$ 108,992	$ 25,650
Brokered deposits	$ 3,500	$ 0

Borrowings - Additional Informa

Borrowings - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)	Mar. 31, 2007USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2007USD ($)Security
Borrowings Under Repurchase Agreements [Line Items]
Unsecured line of credit facility, maximum borrowing capacity			$ 10,000,000	$ 10,000,000
Line of credit, outstanding amount			0	$ 0
FHLB borrowings, available capacity			532,809,000
FHLB borrowings, pledge of selected securities, loan covered amount			8,068,000
FHLB borrowings, pledge on certain loans, loan covered amount			1,085,644,000
Borrowings from unaffiliated entities, interest rate				5.25%
Issuance of preferred securities | Security						2
Proceeds from subordinated borrowings	$ 50,000,000		$ 0	$ 50,000,000	$ 0
Fixed Interest rate loan	5.75%
London Interbank Offered Rate (LIBOR) [Member]
Borrowings Under Repurchase Agreements [Line Items]
Interest rate	4.55%
Unaffiliated Institution [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings from unaffiliated entities, transaction amount		$ 10,000,000
Borrowings securities pledged under certain transaction				11,416,000
Borrowing maturity date			Mar. 20, 2017
Over Night Borrowings [Member] | Unaffiliated institution 1 [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings under US treasury			$ 0	$ 0
Subordinated Debentures [Member]
Borrowings Under Repurchase Agreements [Line Items]
Issue of floating rate trust preferred securities						$ 10,000,000
Trust preferred securities, interest payment deferment period maximum			5 years
Borrowings, floating interest rate description			Floats based on the 3 month LIBOR plus 1.55% and was 3.14% at December 31, 2017 and 2.51% at December 31, 2016.
Line of credit, basis spread on LIBOR			1.55%
Trust preferred securities, period end interest rate			3.14%	2.51%
Trust preferred securities, redemption year maximum			2,037

Borrowings - Schedule of Remain

Borrowings - Schedule of Remaining Borrowing Capacity with FHLB (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 257,359	$ 227,004
Interest Rate 1.54% and 0.74% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	34,416	103,969
Interest Rate 0.83% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 0	15,016
Maturity date	Sep. 6, 2017
Interest Rate 1.25% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 0	15,093
Maturity date	Dec. 15, 2017
Interest Rate 1.05% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 7,550	17,523
Maturity date	Sep. 6, 2018
Interest Rate 1.66% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 30,000	0
Maturity date	Jun. 28, 2019
Interest Rate 1.17% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 11,752	18,360
Maturity date	Sep. 6, 2019
Interest Rate 1.35% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 8,883	13,865
Maturity date	Sep. 16, 2019
Interest Rate 1.82% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 30,000	0
Maturity date	Jun. 29, 2020
Interest Rate 1.27% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 13,859	18,780
Maturity date	Sep. 8, 2020
Interest Rate 1.97% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 30,000	0
Maturity date	Jun. 28, 2021
Interest Rate 1.97% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 50,000	0
Maturity date	Jun. 29, 2022
Interest Rate 1.47% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 15,976	19,201
Maturity date	Sep. 6, 2022
Interest Rate 2.39% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 20,000	0
Maturity date	Dec. 5, 2022
Interest Rate 4.72% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 700	700
Maturity date	Jul. 3, 2023
Interest Rate 4.31% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 1,797	1,925
Maturity date	Sep. 5, 2023
Interest Rate 3.05% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 814	852
Maturity date	Mar. 11, 2024
Interest Rate 5.24% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 435	462
Maturity date	Jun. 11, 2024
Interest Rate 3.35% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 217	240
Maturity date	May 4, 2026
Interest Rate 4.00% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 231	252
Maturity date	Oct. 14, 2026
Interest Rate 2.96% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 729	$ 766
Maturity date	Feb. 11, 2033

Borrowings - Schedule of Rema95

Borrowings - Schedule of Remaining Borrowing Capacity with FHLB (Parenthetical) (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Interest Rate 1.54% and 0.74% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.54%	0.74%
Interest Rate 1.54% and 0.74% [Member] | Maximum [Member]
Borrowings Under Repurchase Agreements [Line Items]
Borrowings	$ 150,000,000
Interest Rate 0.83% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	0.83%
Interest Rate 1.25% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.25%
Interest Rate 1.05% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.05%
Interest Rate 1.66% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.66%
Interest Rate 1.17% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.17%
Interest Rate 1.35% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.35%
Interest Rate 1.82% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.82%
Interest Rate 1.27% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.27%
Interest Rate 1.97% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.97%
Interest Rate 1.97% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.97%
Interest Rate 1.47% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	1.47%
Interest Rate 2.39% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	2.39%
Interest Rate 4.72% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	4.72%
Interest Rate 4.31% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	4.31%
Interest Rate 3.05% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	3.05%
Interest Rate 5.24% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	5.24%
Interest Rate 3.35% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	3.35%
Interest Rate 4.00% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	4.00%
Interest Rate 2.96% [Member]
Borrowings Under Repurchase Agreements [Line Items]
Fixed rate on borrowings	2.96%

Borrowings - Maturity Schedule

Borrowings - Maturity Schedule of All Borrowed Funds (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Borrowings [Abstract]
2,018	$ 62,242
2,019	47,562
2,020	37,505
2,021	33,740
2,022	72,931
Thereafter	73,999
Total borrowed funds	$ 327,979

Interest Rate Swaps - Additiona

Interest Rate Swaps - Additional Information (Detail) - USD ($)	May 03, 2011	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Term of interest rate swap agreement executed	5 years
Interest rate swap inception date	May 3, 2011
Value of subordinated note hedged	$ 10,000,000
Interest rate swap effective date	Sep. 15, 2013
Interest rate		The interest rate swap involves the receipt of variable-rate amounts in exchange for fixed-rate payments from September 15, 2013 to September 15, 2018 without exchange of the underlying notional amount.
Derivatives designated as fair value hedges		$ 0	$ 0
Accumulated other comprehensive loss estimated		270,000
Collateral amount for counterparty interest rate swap		$ 1,400,000	$ 1,400,000
LIBOR Plus 155 Basis Points [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Variable rate on the subordinated debt on effective date in case of interest rate swap		LIBOR plus 155 basis points
Variable interest rate on subordinate debt		3.14%
4.02% Fixed Rate Plus 155 Basis Points [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Variable rate on the subordinated debt on effective date in case of interest rate swap		4.02% fixed rate plus 155 basis points
Interest rate being paid by the corporation		5.57%
Interest Rate Swaps [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative basis spread on variable rate		1.55%
Derivative fixed interest rate rate basis		4.02%

Interest Rate Swaps - Amounts a

Interest Rate Swaps - Amounts and Locations of Activity Related to Interest Rate Swaps Designated as Cash Flow Hedges within Corporation's Consolidated Balance Sheet and Statement of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Interest rate contracts	$ 194	$ 180	$ 137
Accrued Interest Payable and Other Liabilities [Member]
Derivative [Line Items]
Interest rate contract, fair value	(161)	(459)
Interest Expense - Subordinated Debentures [Member]
Derivative [Line Items]
Interest expense, Fair Value	(288)	(340)	(378)
Other Income [Member]
Derivative [Line Items]
Other income	$ 0	$ 0	$ 0

Interest Rate Swaps - Amounts99

Interest Rate Swaps - Amounts and Locations of Activity Related to Back-to-Back Interest Rate Swaps within Corporation's Consolidated Balance Sheet (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
3rd Party Interest Rate Swaps [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Notional Amount	$ 11,848,000	$ 14,814,000
Average Maturity (in years)	8 years	9 years 8 months 12 days
Weighted Average Fixed Rate	4.51%	4.43%
Weighted Average Variable Rate, description	1 month LIBOR + 2.37%	1 month LIBOR + 2.35%
Weighted Average Variable Rate	2.37%	2.35%
Fair Value	$ 149,000	$ 211,000
Customer Interest Rate Swaps [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Notional Amount	$ (11,848,000)	$ (14,814,000)
Average Maturity (in years)	8 years	9 years 8 months 12 days
Weighted Average Fixed Rate	4.51%	4.43%
Weighted Average Variable Rate, description	1 month LIBOR + 2.37%	1 month LIBOR + 2.35%
Weighted Average Variable Rate	2.37%	2.35%
Fair Value	$ (149,000)	$ (211,000)

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Current - federal	$ 8,978	$ 6,181	$ 7,777
Current - state	29	(33)	139
Deferred - federal	376	1,023	376
Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate	3,009	0	0
Income tax expense	$ 12,392	$ 7,171	$ 8,292

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Attributable to Pre-tax Income at Federal Statutory Tax Rates to Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Tax at statutory rate, value	$ 12,688	$ 9,699	$ 10,671
Tax exempt income, net value	(1,899)	(2,054)	(1,816)
Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate, value	3,009	0	0
Bank owned life insurance, value	(581)	(379)	(418)
Merger costs, value	0	170	30
Other, value	(825)	(265)	(175)
Income tax expense	$ 12,392	$ 7,171	$ 8,292
Tax at statutory rate, percent	35.00%	35.00%	35.00%
Tax exempt income, net percent	(5.20%)	(7.40%)	(6.00%)
Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate, percent	8.30%	0.00%	0.00%
Bank owned life insurance, percent	(1.60%)	(1.30%)	(1.40%)
Merger costs, percent	0.00%	0.60%	0.10%
Other, percent	(2.30%)	(1.00%)	(0.50%)
Income tax expense, percent	34.20%	25.90%	27.20%

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
Business Acquisition [Line Items]
Deferred tax adjustment related to reduction in U.S. federal statutory income tax rate, value		$ 3,009,000	$ 0	$ 0
U.S. statutory federal income tax rate		35.00%	35.00%	35.00%
Unrecognized tax benefit		$ 0	$ 0
Income tax matters accrued interest or penalties		0	0
Expense relate to interest and penalties		$ 0	$ 0	$ 0
Income tax examination, open tax year description		Tax years 2014 through 2016 remain open to federal examination.
Net operating loss carryforward, amount		$ 338,000
Annual limit on utilization of operating loss carryforward		1,455,000
Scenario, Forecast [Member]
Business Acquisition [Line Items]
U.S. statutory federal income tax rate	21.00%
Farmers Citizens Bank [Member]
Business Acquisition [Line Items]
Net operating loss carryforward, amount		$ 6,367,000
Net operating loss carryforward, expiration year		2,033

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Asset (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Allowance for loan losses	$ 2,840	$ 4,679
Fair value adjustments - business combination	1,135	2,530
Deferred compensation	1,903	2,891
Impaired security valuation	0	379
Net operating loss carryover	71	627
Post-retirement benefits	892	1,688
Unrealized loss on interest rate swap	34	161
Nonaccrual loan interest	390	649
Accrued expenses	699	1,282
Deferred fees and costs	598	629
Other	344	465
Deferred tax assets	8,906	15,980
Deferred tax liabilities:
Unrealized gain on securities available for sale	126	750
Premises and equipment	1,413	2,258
Unrealized gain on trading securities	156	118
Intangibles - section 197	2,593	4,735
Mortgage servicing rights	291	487
Other	78	23
Deferred tax liabilities	4,657	8,371
Net deferred tax asset	$ 4,249	$ 7,609

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)AgeServices	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee pretax contribution percentage	100.00%
Employees compensation	50.00%
Corporation's matching contribution and related expenses	$ 802	$ 652	$ 508
Profit sharing contributions	6.00%
Compensation percentage in excess of specified amount	5.70%
Excess of compensation	$ 127
Recognized profit sharing expense	1,755	1,276	868
Obligations of other liabilities	5,349	4,958
Expenses related employee benefit plans	648	550	608
Obligations under survivor benefit plan	1,264	1,175
Other liabilities related to survivor benefit plan	$ 89	33	$ 155
Employee retirement health care benefits plan | Age	60
Minimum service period for participation in benefit plan | Services	30
Accumulated benefit obligation	$ 2,740	$ 3,409
Amortized from accumulated other comprehensive income into net periodic benefit cost	$ 84
Weighted average discount rate net periodic benefit cost	3.49%	3.67%	3.42%
Weighted average rate accrued benefit obligations	3.13%	3.49%	3.67%
Expected costs of benefit	5.00%
Percent rate of increase in the health care trend	1.00%
Increase in health care trend rates	$ 267
Increase service and interest costs	$ 19
Percent rate of decrease in the health care trend	1.00%
Decrease in health care trend rates	$ 218
Decrease service and interest costs	$ 15
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee contribution percentage	1.00%
Total contributed by employee percentage	1.00%
Qualifying dependents age group | Age	60
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee contribution percentage	3.00%
Total contributed by employee percentage	2.00%
Qualifying dependents age group | Age	65

Employee Benefit Plans - Unfund

Employee Benefit Plans - Unfunded Post Retirement Benefits Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Sale Of Subsidiary [Abstract]
Benefit obligation at beginning of year	$ 3,409	$ 3,066	$ 2,744
Interest cost	114	108	90
Service cost	103	103	96
Actual claims	(78)	(151)	(109)
Actuarial (gain) loss	(808)	283	245
Benefit obligation at end of year	$ 2,740	$ 3,409	$ 3,066

Employee Benefit Plans - Accumu

Employee Benefit Plans - Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Employee Benefit Plan [Line Items]
Net actuarial loss	$ (871)	$ (1,871)
Tax effect	183	654
Other comprehensive income (loss)	(690)	(1,217)	$ (1,153)	$ (1,063)
Employee Benefit Plan [Member]
Employee Benefit Plan [Line Items]
Other comprehensive income (loss)	$ (688)	$ (1,217)

Employee Benefit Plans - Recogn

Employee Benefit Plans - Recognized Net Periodic Benefit Cost and Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Sale Of Subsidiary [Abstract]
Service cost	$ 103	$ 103	$ 96
Interest cost	114	108	90
Net amortization of transition obligation and actuarial loss	192	184	173
Net periodic benefit cost	409	395	359
Net (gain) loss	(808)	282	311
Amortization of loss	(192)	(184)	(173)
Total recognized in other comprehensive income	(1,000)	98	138
Total recognized in net periodic benefit cost and other comprehensive income	$ (591)	$ 493	$ 497

Deferred Compensation Plans - A

Deferred Compensation Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Compensation Related Costs [Abstract]
Maximum period for deferred compensation plan payment after individual's termination of service	10 years

Deferred Compensation Plans - S

Deferred Compensation Plans - Summary of Changes in Deferred Compensation Plan Liability (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Compensation Related Costs [Abstract]
Balance, beginning of year	$ 2,080	$ 1,226	$ 1,087
Deferrals, dividends, and changes in fair value recorded as an expense	444	936	209
Deferred compensation payments	(21)	(82)	(70)
Balance, end of year	$ 2,503	$ 2,080	$ 1,226

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Changes in Nonvested Restricted Stock Awards (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Nonvested at beginning of period, Shares	100,726
Granted, Shares	39,673	52,750	48,300
Forfeited, Shares	(2,482)
Vested, Shares	(43,445)
Nonvested at end of period, Shares	94,472	100,726
Nonvested at beginning of period, Weighted-average Grant Date Fair Value	$ 17.36
Granted, Weighted-average Grant Date Fair Value	25.94
Forfeited, Weighted-average Grant Date Fair Value	21.12
Vested, Weighted-average Grant Date Fair Value	17.54
Nonvested at end of period, Weighted-average Grant Date Fair Value	$ 20.79	$ 17.36

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares vesting during period	$ 1,035	$ 624	$ 530
Compensation expense	$ 928	$ 820	$ 621
Number of authorized stock-based awards available for grant	219,800
Shares, granted	0	0	0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested restricted stock	$ 1,243	$ 1,190
Performance Based Restricted Stock Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, granted	10,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Related Party Transactions [Abstract]
Aggregate of loans and credit cards total	$ 5,331	$ 4,357
Payments to fund long-term loans to related parties	1,816
Repayment total	667
Net change in outstanding credit card	25
Change in related parties	200
Deposits	$ 11,982	$ 14,434

Capital Requirements and Res113

Capital Requirements and Restrictions on Retained Earnings - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2017EventCapitalCategory	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2018USD ($)
Securities Financing Transaction [Line Items]
Capital conservation buffer phase ratio		1.25%	0.625%	0.00%
Number of capital categories provided by PCA regulation | CapitalCategory		5
Number of events resulting in change in Bank's capital category | Event		0
Scenario, Forecast [Member]
Securities Financing Transaction [Line Items]
Capital conservation buffer phase ratio	2.50%
Accumulated net earnings | $					$ 30,615

Capital Requirements and Res114

Capital Requirements and Restrictions on Retained Earnings - Summary of Actual and Required Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Actual Amount	$ 297,708	$ 261,530
Total Capital to Risk Weighted Assets, Actual Ratio	14.32%	14.05%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount	$ 192,341	$ 160,501
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio	9.25%	8.625%
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Amount	$ 228,015	$ 195,200
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Ratio	10.97%	10.49%
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount	$ 150,754	$ 123,283
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio	7.25%	6.625%
Common equity Tier 1 to Risk Weighted Assets, Actual Amount	$ 208,015	$ 175,200
Common equity Tier 1 to Risk Weighted Assets, Actual Ratio	10.00%	9.41%
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Amount	$ 119,563	$ 95,370
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Ratio	5.75%	5.125%
Tier 1 (Core) Capital to Average Assets, Actual Amount	$ 228,015	$ 195,200
Tier 1 (Core) Capital to Average Assets, Actual Ratio	8.45%	7.85%
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Amount	$ 107,969	$ 99,430
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Actual Amount	$ 279,704	$ 242,592
Total Capital to Risk Weighted Assets, Actual Ratio	13.58%	13.19%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount	$ 190,513	$ 158,590
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio	9.25%	8.625%
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 205,960	$ 183,873
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Amount	$ 261,643	$ 228,109
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Ratio	12.70%	12.41%
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount	$ 149,321	$ 121,816
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio	7.25%	6.625%
Tier 1 (Core) Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 164,768	$ 147,098
Tier 1 (Core) Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Common equity Tier 1 to Risk Weighted Assets, Actual Amount	$ 254,264	$ 220,730
Common equity Tier 1 to Risk Weighted Assets, Actual Ratio	12.35%	12.00%
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Amount	$ 118,427	$ 94,235
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Ratio	5.75%	5.125%
Common equity Tier 1 to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 133,874	$ 119,517
Common equity Tier 1 to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Tier 1 (Core) Capital to Average Assets, Actual Amount	$ 261,643	$ 228,109
Tier 1 (Core) Capital to Average Assets, Actual Ratio	9.80%	9.36%
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Amount	$ 106,798	$ 97,527
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 (Core) Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 133,498	$ 121,909
Tier 1 (Core) Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%

Off Balance Sheet Activities -

Off Balance Sheet Activities - Schedule of Off-Balance Sheet Risks (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Commitments to Make Loans [Member] | Fixed Rate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability	$ 64,799	$ 57,283
Commitments to Make Loans [Member] | Variable Rate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability	210,987	202,883
Unused Lines of Credit [Member] | Fixed Rate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability	0	0
Unused Lines of Credit [Member] | Variable Rate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability	118,348	105,779
Standby Letters of Credit [Member] | Fixed Rate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability	0	0
Standby Letters of Credit [Member] | Variable Rate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability	$ 14,985	$ 4,618

Off Balance Sheet Activities116

Off Balance Sheet Activities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Feb. 28, 2017	Sep. 30, 2016	Oct. 31, 2015
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Commitments to make loans periods	60 days or less
Fixed Interest rate loan				5.75%
Subscription Agreement [Member] | Oxer [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Capital contributions	$ 3,290
Subscription Agreement [Member] | Oxer [Member] | Commitments to Invest [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability					$ 5,000
Subscription Agreement [Member] | Tecum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Capital contributions	$ 1,167
Subscription Agreement [Member] | Tecum [Member] | Commitments to Invest [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Off-balance sheet risks, amount, liability			$ 3,000
Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Fixed Interest rate loan	1.00%	1.19%
Fixed rate loan Maturities range	8 months	6 months
Maximum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Line Items]
Fixed Interest rate loan	18.00%	18.00%
Fixed rate loan Maturities range	30 years	30 years

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities Available For Sale:
Securities available for sale	$ 409,709	$ 495,835
Trading Securities:
Trading securities	7,150	4,858
Certificates of Deposit [Member]
Trading Securities:
Trading securities	220	202
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities Available For Sale:
Securities available for sale	962	971
Interest rate swaps	0	0
Trading Securities:
Trading securities	7,098	4,805
Liabilities
Interest rate swaps	0	0
Significant Other Observable Inputs (Level 2) [Member]
Securities Available For Sale:
Securities available for sale	408,747	492,815
Interest rate swaps	149	211
Trading Securities:
Trading securities	52	53
Liabilities
Interest rate swaps	(310)	(670)
Significant Unobservable Inputs (Level 3) [Member]
Securities Available For Sale:
Securities available for sale	0	2,049
Interest rate swaps	0	0
Trading Securities:
Trading securities	0	0
Liabilities
Interest rate swaps	0	0
Fair Value Measurement on Recurring Basis [Member]
Securities Available For Sale:
Securities available for sale	409,709	495,835
Interest rate swaps	149	211
Trading Securities:
Trading securities	7,150	4,858
Liabilities
Interest rate swaps	(310)	(670)
Fair Value Measurement on Recurring Basis [Member] | U.S. Government Sponsored Entities [Member]
Securities Available For Sale:
Securities available for sale	108,148	140,351
Trading Securities:
Trading securities	52	53
Fair Value Measurement on Recurring Basis [Member] | States and Political Subdivisions [Member]
Securities Available For Sale:
Securities available for sale	137,723	157,037
Fair Value Measurement on Recurring Basis [Member] | Residential and Multi-Family Mortgage [Member]
Securities Available For Sale:
Securities available for sale	109,636	134,976
Fair Value Measurement on Recurring Basis [Member] | Corporate Notes and Bonds [Member]
Securities Available For Sale:
Securities available for sale	17,200	17,414
Trading Securities:
Trading securities	254	254
Fair Value Measurement on Recurring Basis [Member] | Pooled Trust Preferred [Member]
Securities Available For Sale:
Securities available for sale		2,049
Fair Value Measurement on Recurring Basis [Member] | Pooled SBA [Member]
Securities Available For Sale:
Securities available for sale	36,040	43,037
Fair Value Measurement on Recurring Basis [Member] | Other Equity Securities [Member]
Securities Available For Sale:
Securities available for sale	962	971
Fair Value Measurement on Recurring Basis [Member] | Corporate Equity Securities [Member]
Trading Securities:
Trading securities	5,125	3,312
Fair Value Measurement on Recurring Basis [Member] | Mutual Funds [Member]
Trading Securities:
Trading securities	1,499	1,037
Fair Value Measurement on Recurring Basis [Member] | Certificates of Deposit [Member]
Trading Securities:
Trading securities	220	202
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities Available For Sale:
Securities available for sale	962	971
Interest rate swaps	0	0
Trading Securities:
Trading securities	7,098	4,805
Liabilities
Interest rate swaps	0	0
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Government Sponsored Entities [Member]
Securities Available For Sale:
Securities available for sale	0	0
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | States and Political Subdivisions [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Residential and Multi-Family Mortgage [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Notes and Bonds [Member]
Securities Available For Sale:
Securities available for sale	0	0
Trading Securities:
Trading securities	254	254
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pooled Trust Preferred [Member]
Securities Available For Sale:
Securities available for sale		0
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pooled SBA [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Equity Securities [Member]
Securities Available For Sale:
Securities available for sale	962	971
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Equity Securities [Member]
Trading Securities:
Trading securities	5,125	3,312
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mutual Funds [Member]
Trading Securities:
Trading securities	1,499	1,037
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of Deposit [Member]
Trading Securities:
Trading securities	220	202
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member]
Securities Available For Sale:
Securities available for sale	408,747	492,815
Interest rate swaps	149	211
Trading Securities:
Trading securities	52	53
Liabilities
Interest rate swaps	(310)	(670)
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Entities [Member]
Securities Available For Sale:
Securities available for sale	108,148	140,351
Trading Securities:
Trading securities	52	53
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | States and Political Subdivisions [Member]
Securities Available For Sale:
Securities available for sale	137,723	157,037
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Residential and Multi-Family Mortgage [Member]
Securities Available For Sale:
Securities available for sale	109,636	134,976
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes and Bonds [Member]
Securities Available For Sale:
Securities available for sale	17,200	17,414
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Pooled Trust Preferred [Member]
Securities Available For Sale:
Securities available for sale		0
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Pooled SBA [Member]
Securities Available For Sale:
Securities available for sale	36,040	43,037
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Equity Securities [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Equity Securities [Member]
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mutual Funds [Member]
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Certificates of Deposit [Member]
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member]
Securities Available For Sale:
Securities available for sale	0	2,049
Interest rate swaps	0	0
Trading Securities:
Trading securities	0	0
Liabilities
Interest rate swaps	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Sponsored Entities [Member]
Securities Available For Sale:
Securities available for sale	0	0
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | States and Political Subdivisions [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Residential and Multi-Family Mortgage [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Notes and Bonds [Member]
Securities Available For Sale:
Securities available for sale	0	0
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled Trust Preferred [Member]
Securities Available For Sale:
Securities available for sale		2,049
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled SBA [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Equity Securities [Member]
Securities Available For Sale:
Securities available for sale	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Equity Securities [Member]
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mutual Funds [Member]
Trading Securities:
Trading securities	0	0
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Certificates of Deposit [Member]
Trading Securities:
Trading securities	$ 0	$ 0

Fair Value - Securities Availab

Fair Value - Securities Available for Sale Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - Pooled Trust Preferred [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 2,049	$ 3,413
Total gains or (losses):
Included in other comprehensive income (loss)	134	(442)
Included in realized gains on available-for-sale securities		0
Sale of available-for-sale securities	(2,183)	(922)
Ending Balance	$ 0	$ 2,049

Fair Value - Quantitative Infor

Fair Value - Quantitative Information About Level 3 Fair Value Measurements (Detail) - Pooled Trust Preferred [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 2,049
Collateral Default Rate [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input utilized two	0.5% in 2016 and thereafter
Yield (Weighted Average) [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input utilized one	10.00%
Prepayment Speed [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input utilized two	2.0% constant prepayment rate in 2016 and thereafter

Fair Value - Assets and Liab120

Fair Value - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Commercial Mortgages [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Impaired loans:
Fair value assets and liabilities measured on a nonrecurring basis	$ 11	$ 2,067
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Impaired loans:
Fair value assets and liabilities measured on a nonrecurring basis	0	0
Significant Other Observable Inputs (Level 2) [Member]
Impaired loans:
Fair value assets and liabilities measured on a nonrecurring basis	0	0
Significant Unobservable Inputs (Level 3) [Member]
Impaired loans:
Fair value assets and liabilities measured on a nonrecurring basis	$ 11	$ 2,067

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans, recorded investment	$ 18,541	$ 18,782
Impaired loans allowance	5,736	3,523
Collateral Dependent Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans, recorded investment	646	3,120
Impaired loans allowance	635	1,053
Impaired loans, additional negative provisions	$ (418)	$ (189)

Fair Value - Quantitative In122

Fair Value - Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Non Recurring Basis (Detail) - Impaired Loans - Commercial Mortgages [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 11
Valuation Technique	10.00%
Sales Comparison Approach and Discounted Cash Flow Method [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 2,067
Weighted Average [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	10.00%
Weighted Average [Member] | Sales Comparison Approach and Discounted Cash Flow Method [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique		13.00%
Minimum [Member] | Sales Comparison Approach and Discounted Cash Flow Method [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique		10.00%
Maximum [Member] | Sales Comparison Approach and Discounted Cash Flow Method [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique		14.00%

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 35,345	$ 29,183	$ 27,261	$ 27,928
Securities available for sale	409,709	495,835
Trading securities	7,150	4,858
Loans held for sale	852	7,528
Net loans	2,126,266	1,857,206
FHLB and other equity interests	21,517	19,186
Liabilities
Deposits	(2,167,815)	(2,017,522)
Subordinated debentures	(70,620)	(70,620)
Deposits held for sale	0	(6,456)
Carrying Amount [Member]
ASSETS
Cash and cash equivalents	35,345	29,183
Securities available for sale	409,709	495,835
Trading securities	7,150	4,858
Loans held for sale	852	7,528
Net loans	2,126,266	1,857,206
FHLB and other equity interests	21,517	19,186
Interest rate swaps	149	211
Accrued interest receivable	9,254	8,264
Liabilities
Deposits	(2,167,815)	(2,017,522)
FHLB and other borrowings	(257,359)	(237,004)
Subordinated debentures	(70,620)	(70,620)
Deposits held for sale	0	(6,456)
Interest rate swaps	(310)	(670)
Accrued interest payable	(554)	(510)
Total Fair Value [Member]
ASSETS
Cash and cash equivalents	35,345	29,183
Securities available for sale	409,709	495,835
Trading securities	7,150	4,858
Loans held for sale	853	7,553
Net loans	2,126,824	1,817,341
Interest rate swaps	149	211
Accrued interest receivable	9,254	8,264
Liabilities
Deposits	(2,165,600)	(2,005,414)
FHLB and other borrowings	(257,361)	(226,769)
Subordinated debentures	(63,575)	(61,831)
Deposits held for sale	0	(6,417)
Interest rate swaps	(310)	(670)
Accrued interest payable	(554)	(510)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
ASSETS
Cash and cash equivalents	35,345	29,183
Securities available for sale	962	971
Trading securities	7,098	4,805
Loans held for sale	0	0
Net loans	0	0
Interest rate swaps	0	0
Accrued interest receivable	6	6
Liabilities
Deposits	(1,802,844)	(1,785,649)
FHLB and other borrowings	0	0
Subordinated debentures	0	0
Deposits held for sale	0	0
Interest rate swaps	0	0
Accrued interest payable	0	0
Significant Other Observable Inputs (Level 2) [Member]
ASSETS
Cash and cash equivalents	0	0
Securities available for sale	408,747	492,815
Trading securities	52	53
Loans held for sale	853	7,553
Net loans	0	0
Interest rate swaps	149	211
Accrued interest receivable	2,651	3,014
Liabilities
Deposits	(362,756)	(219,765)
FHLB and other borrowings	(257,361)	(226,769)
Subordinated debentures	(63,575)	(61,831)
Deposits held for sale	0	(6,417)
Interest rate swaps	(310)	(670)
Accrued interest payable	(554)	(510)
Significant Unobservable Inputs (Level 3) [Member]
ASSETS
Cash and cash equivalents	0	0
Securities available for sale	0	2,049
Trading securities	0	0
Loans held for sale	0	0
Net loans	2,126,824	1,817,341
Interest rate swaps	0	0
Accrued interest receivable	6,597	5,244
Liabilities
Deposits	0	0
FHLB and other borrowings	0	0
Subordinated debentures	0	0
Deposits held for sale	0	0
Interest rate swaps	0	0
Accrued interest payable	$ 0	$ 0

Parent Company Only Financia124

Parent Company Only Financial Information - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Trading securities	$ 7,150	$ 4,858
Total Assets	2,768,773	2,573,821
Liabilities
Subordinated debentures	70,620	70,620
Total liabilities	2,524,863	2,362,037
Total shareholders' equity	243,910	211,784	$ 201,913	$ 188,548
Total Liabilities and Shareholders' Equity	2,768,773	2,573,821
Parent Company [Member]
ASSETS
Cash	1,556	1,436
Trading securities	580	529
Investment in bank subsidiary	290,156	257,476
Investment in non-bank subsidiaries	21,781	23,324
Deferreds and Current Receivable	2,055	1,066
Other assets	2,059	2,666
Total Assets	318,187	286,497
Liabilities
Borrowings from subsidiary	1,400	1,400
Subordinated debentures	70,620	70,620
Other liabilities	2,257	2,693
Total liabilities	74,277	74,713
Total shareholders' equity	243,910	201,913
Total Liabilities and Shareholders' Equity	$ 318,187	$ 286,497

Parent Company Only Financia125

Parent Company Only Financial Information - Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Dividends from:
Income tax benefit									$ (12,392)	$ (7,171)	$ (8,292)
Net Income	$ 3,451	$ 7,246	$ 6,683	$ 6,480	$ 5,040	$ 6,416	$ 4,065	$ 5,019	23,860	20,540	22,197
Parent Company [Member]
Dividends from:
Bank subsidiary									8,840	8,700	10,404
Non-bank subsidiaries									2,250	1,200	323
Other									220	230	157
Total income									11,310	10,130	10,884
Expenses									(4,957)	(2,611)	(1,708)
Income before income taxes and equity in undistributed net income of subsidiaries:									6,353	7,519	9,176
Income tax benefit									1,614	813	547
Equity in undistributed net income of bank subsidiary									17,430	13,184	11,889
Distributions in excess of net income of non-bank subsidiaries									(1,537)	(976)	585
Net Income									$ 23,860	$ 20,540	$ 22,197

Parent Company Only Financia126

Parent Company Only Financial Information - 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
Condensed Financial Statements, Captions [Line Items]
Net income	$ 3,451	$ 7,246	$ 6,683	$ 6,480	$ 5,040	$ 6,416	$ 4,065	$ 5,019	$ 23,860	$ 20,540	$ 22,197
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized gains on trading securities									(881)	(503)	213
Decrease (increase) in other assets									(1,175)	(3,906)	93
(Decrease) increase in other liabilities									698	2,095	5,435
Net Cash Provided By Operating Activities									30,763	26,764	33,636
Cash flows from investing activities
Net cash used in investing activities									(203,651)	(150,883)	(100,714)
Cash Flows From Financing Activities:
Dividends paid									(10,094)	(9,546)	(9,515)
Proceeds from issuance of long term debt									160,000	80,000	50,000
Purchase of treasury stock									(1,877)	(44)	(868)
Net proceeds from issuance of common stock									19,294	0	0
Net Cash Provided By Financing Activities									179,050	126,041	66,411
Net increase (decrease) in cash									6,162	1,922	(667)
Cash and Cash Equivalents, Beginning				29,183				27,261	29,183	27,261	27,928
Cash and Cash Equivalents, Ending	35,345				29,183				35,345	29,183	27,261
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									23,860	20,540	22,197
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of bank subsidiary									(17,430)	(13,184)	(11,889)
Equity in undistributed net income (distributions in excess of net income) of non-bank subsidiaries									1,537	976	(585)
Net unrealized gains on trading securities									(12)	(58)	(11)
Decrease (increase) in other assets									(549)	(1,277)	9
(Decrease) increase in other liabilities									791	1,645	663
Net Cash Provided By Operating Activities									8,197	8,642	10,384
Cash flows from investing activities
Investment in bank subsidiaries									(15,400)	(49,223)	0
Net cash used in investing activities									(15,400)	(49,223)	0
Cash Flows From Financing Activities:
Dividends paid									(10,094)	(9,546)	(9,515)
Proceeds from issuance of long term debt									0	50,000	0
Purchase of treasury stock									(1,877)	(44)	(868)
Net proceeds from issuance of common stock									19,294	0	0
Net advance from subsidiary									0	50	0
Net Cash Provided By Financing Activities									7,323	40,460	(10,383)
Net increase (decrease) in cash									120	(121)	1
Cash and Cash Equivalents, Beginning				$ 1,436				$ 1,557	1,436	1,557	1,556
Cash and Cash Equivalents, Ending	$ 1,556				$ 1,436				$ 1,556	$ 1,436	$ 1,557

Other Comprehensive Income - Co

Other Comprehensive Income - Components of Other Comprehensive Income and Related Tax Effects (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Unrealized holding losses on available for sale securities	$ (136)	$ (1,838)	$ (623)
Less reclassification adjustment for gains recognized in earnings	(160)	(83)	(666)
Net unrealized losses	(296)	(1,921)	(1,289)
Tax effect	104	672	452
Net-of-tax amount	(192)	(1,249)	(837)
Unrealized holding gains on available for sale securities for which a portion of an other-than-temporary impairment has been recognized in earnings	134	(442)	2,508
Less reclassification adjustment for gains recognized in earnings	(1,383)	(922)	0
Net unrealized gains	(1,249)	(1,364)	2,508
Tax effect	437	477	(878)
Net-of-tax amount	(812)	(887)	1,630
Actuarial gain (loss) on postemployment health care plan	808	(282)	(311)
Net amortization of transition obligation and actuarial gain	192	184	173
Net unrealized gain (loss) on postemployment health care plan	1,000	(98)	(138)
Tax effect	(175)	34	48
Net-of-tax amount	825	(64)	(90)
Unrealized gain (loss) on interest rate swap	10	(63)	(168)
Less reclassification adjustment for losses recognized in earnings	288	340	378
Net unrealized gain	298	277	210
Tax effect	(104)	(97)	(73)
Net-of-tax amount	194	180	137
Total other comprehensive (loss) income	$ 15	$ (2,020)	$ 840

Other Comprehensive Income - Su

Other Comprehensive Income - Summary of Change in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Unrealized gains (losses) on securities available for sale, Beginning Balance	$ 1,393	$ 3,529	$ 2,736
Unrealized gains (losses) on securities available for sale, Comprehensive Income (Loss)	(1,004)	(2,136)	793
Unrealized gains (losses) on securities available for sale, Reclassification of Disproportionate Tax Effect	84	0	0
Unrealized gains (losses) on securities available for sale, Ending Balance	473	1,393	3,529
Unrealized gain (loss) on postretirement benefits plan, Beginning Balance	(1,217)	(1,153)	(1,063)
Unrealized gain (loss) on postretirement benefits plan, Comprehensive Income (Loss)	825	(64)	(90)
Unrealized gain (loss) on postretirement benefits plan, Reclassification of Disproportionate Tax Effect	(298)	0	0
Unrealized gain (loss) on postretirement benefits plan, Ending Balance	(690)	(1,217)	(1,153)
Unrealized loss on interest rate swap, Beginning Balance	(297)	(477)	(614)
Unrealized loss on interest rate swap, Comprehensive Income (Loss)	194	180	137
Unrealized loss on interest rate swap, Reclassification of Disproportionate Tax Effect	(23)	0	0
Unrealized loss on interest rate swap, Ending Balance	(126)	(297)	(477)
Total, Beginning Balance	(121)	1,899	1,059
Total, Comprehensive Income (Loss)	15	(2,020)	840
Total, Reclassification of Disproportionate Tax Effect	(237)	0	0
Total, Ending Balance	$ (343)	$ (121)	$ 1,899

Quarterly Financial Data (Un129

Quarterly Financial Data (Unaudited) - Unaudited Quarterly Results of Operations (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
Quarterly Financial Information Disclosure [Abstract]
Total interest and dividend income	$ 28,698	$ 28,069	$ 27,003	$ 25,104	$ 24,818	$ 24,958	$ 22,473	$ 22,066	$ 108,874	$ 94,315	$ 87,178
Net interest income	23,801	23,517	22,989	21,202	21,009	21,933	19,403	18,942	91,509	81,287	74,707
Provision for loan losses	3,105	1,400	1,134	1,016	2,111	622	220	1,196	6,655	4,149	2,560
Non-interest income	5,541	5,032	5,089	5,773	4,622	4,473	4,819	3,777	21,435	17,691	17,094
Non-interest expense	17,588	17,618	17,797	17,034	16,455	17,096	18,753	14,814	70,037	67,118	58,752
Net income	$ 3,451	$ 7,246	$ 6,683	$ 6,480	$ 5,040	$ 6,416	$ 4,065	$ 5,019	$ 23,860	$ 20,540	$ 22,197
Net income per share, basic	$ 0.23	$ 0.47	$ 0.44	$ 0.43	$ 0.35	$ 0.44	$ 0.28	$ 0.35	$ 1.57	$ 1.42	$ 1.54
Net income per share, diluted	$ 0.23	$ 0.47	$ 0.44	$ 0.43	$ 0.35	$ 0.44	$ 0.28	$ 0.35	$ 1.57	$ 1.42	$ 1.54