Emclaire Financial (EMCF) 10-Q 15 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 14, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	EMCLAIRE FINANCIAL CORP
Entity Central Index Key	858,800
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Trading Symbol	EMCF
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		2,271,139

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 2,529	$ 3,072
Interest earning deposits with banks	14,648	11,302
Cash and cash equivalents	17,177	14,374
Securities - available for sale	96,216	99,350
Securities - equity investments	659	1,817
Loans held for sale	239	504
Loans receivable, net of allowance for loan losses of $5,935 and $6,127	584,242	577,234
Federal bank stocks, at cost	4,329	4,662
Bank-owned life insurance	11,808	11,724
Accrued interest receivable	2,236	2,217
Premises and equipment, net	17,911	18,010
Goodwill	10,288	10,288
Core deposit intangible, net	413	481
Prepaid expenses and other assets	10,290	9,423
Total Assets	755,808	750,084
Deposits:
Non-interest bearing	129,159	126,263
Interest bearing	537,576	528,380
Total deposits	666,735	654,643
Short-term borrowed funds	2,050	2,500
Long-term borrowed funds	18,250	23,500
Accrued interest payable	367	413
Accrued expenses and other liabilities	9,529	9,937
Total Liabilities	696,931	690,993
Commitments and Contingent Liabilities
Stockholders' Equity:
Common stock, $1.25 par value, 12,000,000 shares authorized; 2,373,156 and 2,373,156 shares issued; 2,271,139 and 2,271,139 shares outstanding, respectively	2,966	2,966
Additional paid-in capital	31,106	31,031
Treasury stock, at cost; 102,017 shares	(2,114)	(2,114)
Retained earnings	33,639	32,726
Accumulated other comprehensive loss	(6,720)	(5,518)
Total Stockholders' Equity	58,877	59,091
Total Liabilities and Stockholders' Equity	$ 755,808	$ 750,084

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 5,935	$ 6,127
Common stock, par value (in dollars per share)	$ 1.25	$ 1.25
Common stock authorized (in shares)	12,000,000	12,000,000
Common stock issued (in shares)	2,373,156	2,373,156
Common stock outstanding (in shares)	2,271,139	2,271,139
Treasury stock (in shares)	102,017	102,017

Consolidated Statements of Net

Consolidated Statements of Net Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest and dividend income:
Loans receivable, including fees	$ 6,337	$ 5,565
Securities:
Taxable	408	395
Exempt from federal income tax	152	143
Federal bank stocks	64	53
Interest earning deposits with banks	33	16
Total interest and dividend income	6,994	6,172
Interest expense:
Deposits	991	703
Borrowed funds	158	313
Total interest expense	1,149	1,016
Net interest income	5,845	5,156
Provision for loan losses	380	162
Net interest income after provision for loan losses	5,465	4,994
Noninterest income:
Fees and service charges	437	408
Net realized loss on sales of securities	(29)	0
Net gain on sales of loans	22	6
Earnings on bank-owned life insurance	104	101
Other	365	341
Total noninterest income	899	856
Noninterest expense:
Compensation and employee benefits	2,453	2,323
Premises and equipment	770	758
Intangible asset amortization	69	60
Professional fees	216	202
Federal deposit insurance	137	108
Other	1,091	1,170
Total noninterest expense	4,736	4,621
Income before provision for income taxes	1,628	1,229
Provision for income taxes	266	273
Net income	$ 1,362	$ 956
Basic earnings per common share (in dollars per share)	$ 0.60	$ 0.44
Diluted earnings per common share (in dollars per share)	$ 0.60	$ 0.44
Average common shares outstanding - basic (in shares)	2,271,139	2,152,358
Average common shares outstanding - diluted (in shares)	2,285,315	2,168,014

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 1,362	$ 956
Unrealized gains/(losses) on securities available for sale:
Unrealized holding gain (loss) arising during the period	(1,314)	391
Reclassification adjustment for losses included in net income	29	0
Other comprehensive income total	(1,285)	391
Tax effect	270	(133)
Net of tax	(1,015)	258
Comprehensive income	$ 347	$ 1,214

Condensed Consolidated Statemen

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 1,362	$ 956
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	294	292
Provision for loan losses	380	162
Amortization of premiums, net	120	158
Amortization of intangible assets and mortgage servicing rights	81	77
Realized losses on sales of securities, net	29	0
Net gains on sales of loans	(22)	(6)
Net loss on foreclosed real estate	41	0
Gain on sale of premises and equipment	(25)	0
Loans originated for sale	(1,237)	(1,791)
Proceeds from the sale of loans originated for sale	1,524	1,865
Stock compensation expense	75	55
Increase in bank-owned life insurance, net	(84)	(83)
Increase in accrued interest receivable	(19)	(120)
(Increase) decrease in prepaid expenses and other assets	(215)	168
Increase in accrued interest payable	(46)	14
Decrease in accrued expenses and other liabilities	(407)	(435)
Net cash provided by operating activities	1,851	1,312
Cash flows from investing activities
Loan originations and principal collections, net	(7,992)	(20,102)
Securities:
Sales	6,531	0
Maturities, repayments and calls	1,902	3,821
Purchases	(5,667)	(983)
Redemption of federal bank stocks	333	235
Proceeds from the sale of bank premises and equipment	155	0
Proceeds from the sale of foreclosed real estate	129	100
Purchases of premises and equipment	(195)	(86)
Net cash used in investing activities	(4,804)	(17,015)
Cash flows from financing activities
Net increase in deposits	12,092	21,166
Repayments on long-term debt	(5,250)	0
Net change in short-term borrowings	(450)	(7,250)
Dividends paid	(636)	(581)
Net cash provided by financing activities	5,756	13,335
Increase (decrease) in cash and cash equivalents	2,803	(2,368)
Cash and cash equivalents at beginning of period	14,374	17,568
Cash and cash equivalents at end of period	17,177	15,200
Supplemental information:
Interest paid	1,195	1,002
Supplemental noncash disclosure:
Transfers from loans to foreclosed real estate	$ 498	$ 29

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at beginning of period at Dec. 31, 2016	$ 54,073	$ 2,818	$ 27,900	$ (2,114)	$ 29,960	$ (4,491)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	956				956
Other comprehensive income (loss)	258					258
Stock compensation expense	55		55
Dividends declared on common stock	(581)				(581)
Balance at end of period at Mar. 31, 2017	54,761	2,818	27,955	(2,114)	30,335	(4,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle for marketable equity securities, net of tax						(187)
Cumulative effect of change in accounting principle for marketable equity securities, net of tax | Accounting Standards Update 2016-01	0				187	(187)
Balance at beginning of period (Previously Reported) at Dec. 31, 2017	59,091	2,966	31,031	(2,114)	32,726	(5,518)
Balance at beginning of period at Dec. 31, 2017	59,091	2,966	31,031	(2,114)	32,913	(5,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,362				1,362
Other comprehensive income (loss)	(1,015)					(1,015)
Stock compensation expense	75		75
Dividends declared on common stock	(636)				(636)
Balance at end of period at Mar. 31, 2018	$ 58,877	$ 2,966	$ 31,106	$ (2,114)	$ 33,639	$ (6,720)

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividend per common share (in dollars per share)	$ 0.28	$ 0.27

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	Nature of Operations and Basis of Presentation Emclaire Financial Corp (the Corporation) is a Pennsylvania corporation and the holding company of The Farmers National Bank of Emlenton (the Bank) and Emclaire Settlement Services, LLC (the Title Company). The Corporation provides a variety of financial services to individuals and businesses through its offices in western Pennsylvania and northern West Virginia. Its primary deposit products are checking, savings and term certificate accounts and its primary lending products are residential and commercial mortgages, commercial business loans and consumer loans. The consolidated financial statements include the accounts of the Corporation and its wholly owned subsidiaries, the Bank and the Title Company. All significant intercompany transactions and balances have been eliminated in preparing the consolidated financial statements. The accompanying unaudited consolidated financial statements for the interim periods include all adjustments, consisting of normal recurring accruals, which are necessary, in the opinion of management, to fairly reflect the Corporation’s consolidated financial position and results of operations. Additionally, these consolidated financial statements for the interim periods have been prepared in accordance with instructions for the Securities and Exchange Commission’s (SEC’s) Form 10-Q and Article 10 of Regulation S-X and therefore do not include all information or footnotes necessary for a complete presentation of financial condition, results of operations and cash flows in conformity with accounting principles generally accepted in the United States of America (GAAP). For further information, refer to the audited consolidated financial statements and footnotes thereto for the year ended December 31, 2017 , as contained in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC. The balance sheet at December 31, 2017 has been derived from the audited financial statements at that date but does not include all the information and footnotes required by GAAP for complete financial statements. The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. The results of operations for interim quarterly or year-to-date periods are not necessarily indicative of the results that may be expected for the entire year or any other period. Certain amounts previously reported may have been reclassified to conform to the current year’s financial statement presentation.

Earnings per Common Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Common Share Basic earnings per common share (EPS) excludes dilution and is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS includes the dilutive effect of additional potential common shares for assumed issuance of restricted stock and shares issued under stock options. The factors used in the Corporation’s earnings per common share computation follow: (Dollar amounts in thousands, except for per share amounts) For the three months ended March 31, 2018 2017 Earnings per common share - basic Net income $ 1,362 $ 956 Average common shares outstanding 2,271,139 2,152,358 Basic earnings per common share $ 0.60 $ 0.44 Earnings per common share - diluted Net income $ 1,362 $ 956 Average common shares outstanding 2,271,139 2,152,358 Add: Dilutive effects of assumed issuance of restricted stock and exercise of stock options 14,176 15,656 Average shares and dilutive potential common shares 2,285,315 2,168,014 Diluted earnings per common share $ 0.60 $ 0.44 Stock options not considered in computing earnings per share because they were antidilutive — —

Securities

Securities	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Equity Securities The Corporation held equity securities with fair values of $659,000 and $1.8 million at March 31, 2018 and December 31, 2017, respectively. Beginning January 1, 2018, with the adoption of ASU 2016-01, changes in the fair value are included in other income on the consolidated statements of net income as opposed in accumulated other comprehensive loss on the consolidated balance sheets. During the three months ended March 31, 2018, the Corporation recognized a loss of $5,000 on the equity securities held at March 31, 2018. The Corporation sold $961,000 of equity securities with a realized net loss of $23,000 in the three month period ending March 31, 2018. Debt Securities - Available for Sale The following table summarizes the Corporation’s debt securities as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value March 31, 2018: U.S. Treasury and federal agency $ 4,538 $ — $ (111 ) $ 4,427 U.S. government sponsored entities and agencies 14,126 — (387 ) 13,739 U.S. agency mortgage-backed securities: residential 23,957 4 (495 ) 23,466 U.S. agency collateralized mortgage obligations: residential 22,204 33 (904 ) 21,333 State and political subdivisions 25,265 10 (480 ) 24,795 Corporate debt securities 8,508 15 (67 ) 8,456 $ 98,598 $ 62 $ (2,444 ) $ 96,216 December 31, 2017: U.S. Treasury and federal agency 4,541 — (69 ) 4,472 U.S. government sponsored entities and agencies 14,136 2 (212 ) 13,926 U.S. agency mortgage-backed securities: residential 20,904 7 (153 ) 20,758 U.S. agency collateralized mortgage obligations: residential 22,607 25 (708 ) 21,924 State and political subdivisions 29,249 87 (96 ) 29,240 Corporate debt securities 9,009 38 (17 ) 9,030 $ 100,446 $ 159 $ (1,255 ) $ 99,350 The following table summarizes scheduled maturities of the Corporation’s debt securities as of March 31, 2018 . Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Mortgage-backed securities and collateralized mortgage obligations are not due at a single maturity and are shown separately. (Dollar amounts in thousands) Available for sale Amortized Cost Fair Value Due in one year or less $ 3,350 $ 3,336 Due after one year through five years 26,768 26,231 Due after five through ten years 18,825 18,454 Due after ten years 3,494 3,396 Mortgage-backed securities: residential 23,957 23,466 Collateralized mortgage obligations: residential 22,204 21,333 $ 98,598 $ 96,216 3. Securities (continued) Information pertaining to debt securities with gross unrealized losses at March 31, 2018 and December 31, 2017 , aggregated by investment category and length of time that individual securities have been in a continuous loss position are included in the table below: (Dollar amounts in thousands) Less than 12 Months 12 Months or More Total Description of Securities Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss March 31, 2018: U.S. Treasury and federal agency $ — $ — $ 4,427 $ (111 ) $ 4,427 $ (111 ) U.S. government sponsored entities and agencies 4,866 (125 ) 8,873 (262 ) 13,739 (387 ) U.S. agency mortgage-backed securities: residential 13,565 (289 ) 6,256 (206 ) 19,821 (495 ) U.S. agency collateralized mortgage obligations: residential 1,935 (7 ) 17,567 (897 ) 19,502 (904 ) State and political subdivisions 18,824 (412 ) 2,387 (68 ) 21,211 (480 ) Corporate debt securities 2,942 (65 ) 500 (2 ) 3,442 (67 ) $ 42,132 $ (898 ) $ 40,010 $ (1,546 ) $ 82,142 $ (2,444 ) December 31, 2017: U.S. Treasury and federal agency $ — $ — $ 4,472 $ (69 ) $ 4,472 $ (69 ) U.S. government sponsored entities and agencies 3,447 (42 ) 8,975 (170 ) 12,422 (212 ) U.S. agency mortgage-backed securities: residential 9,659 (48 ) 6,581 (105 ) 16,240 (153 ) U.S. agency collateralized mortgage obligations: residential 954 (16 ) 19,147 (692 ) 20,101 (708 ) State and political subdivisions 10,510 (60 ) 3,487 (36 ) 13,997 (96 ) Corporate debt securities 2,992 (16 ) 999 (1 ) 3,991 (17 ) $ 27,562 $ (182 ) $ 43,661 $ (1,073 ) $ 71,223 $ (1,255 ) Losses on sales of securities for the three months ended March 31 were as follows: (Dollar amounts in thousands) For the three months 2018 2017 Proceeds $ 6,531 $ — Losses (29 ) — Tax provision related to losses (6 ) — Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic, market or other conditions warrant such evaluation. Consideration is given to: (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, (3) whether the market decline was affected by macroeconomic conditions and (4) whether the Corporation has the intent to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis. If the Corporation intends to sell an impaired security, or if it is more likely than not the Corporation will be required to sell the security before its anticipated recovery, the Corporation records an other-than-temporary loss in an amount equal to the entire difference between fair value and amortized cost. Otherwise, only the credit portion of the estimated loss on debt securities is recognized in earnings, with the other portion of the loss recognized in other comprehensive income. 3. Securities (continued) There were 123 debt securities in an unrealized loss position as of March 31, 2018 , of which 51 were in an unrealized loss position for more than 12 months. Of these 51 securities, 24 were government-backed collateralized mortgage obligations, 8 were U.S. government sponsored entity and agency securities, 7 were state and political subdivision securities, 6 were mortgage-backed securities, 5 were U.S. Treasury securities and 1 was a corporate security. The unrealized losses associated with these securities were not due to the deterioration in the credit quality of the issuer that would likely result in the non-collection of contractual principal and interest, but rather have been caused by a rise in interest rates from the time the securities were purchased. Based on that evaluation and other general considerations, and given that the Corporation’s current intention is not to sell any impaired securities and it is more likely than not it will not be required to sell these securities before the recovery of its amortized cost basis, the Corporation does not consider these debt securities with unrealized losses as of March 31, 2018 to be other-than-temporarily impaired.

Loans Receivable and Related Al

Loans Receivable and Related Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans Receivable and Related Allowance for Loan Losses	Loans Receivable and Related Allowance for Loan Losses The Corporation’s loans receivable as of the respective dates are summarized as follows: (Dollar amounts in thousands) March 31, December 31, Mortgage loans on real estate: Residential first mortgages $ 224,690 $ 221,823 Home equity loans and lines of credit 100,241 99,940 Commercial real estate 196,788 193,068 521,719 514,831 Other loans: Commercial business 59,200 58,941 Consumer 9,258 9,589 68,458 68,530 Total loans, gross 590,177 583,361 Less allowance for loan losses 5,935 6,127 Total loans, net $ 584,242 $ 577,234 Included in total loans above are net deferred costs of $1.6 million and $1.5 million at March 31, 2018 and December 31, 2017 , respectively. An allowance for loan losses (ALL) is maintained to absorb probable incurred losses from the loan portfolio. The ALL is based on management’s continuing evaluation of the risk characteristics and credit quality of the loan portfolio, assessment of current economic conditions, diversification and size of the portfolio, adequacy of collateral, past and anticipated loss experience and the amount of nonperforming loans. Management reviews the loan portfolio on a quarterly basis using a defined, consistently applied process in order to make appropriate and timely adjustments to the ALL. When information confirms all or part of specific loans to be uncollectible, these amounts are promptly charged off against the ALL. The allowance for loan losses is based on estimates and actual losses may vary from current estimates. Management believes that the granularity of the homogeneous pools and the related historical loss ratios and other qualitative factors, as well as the consistency in the application of assumptions, result in an ALL that is representative of the risk found in the components of the portfolio at any given date. At March 31, 2018 , there was no allowance for loan losses allocated to loans acquired in the April 2016 acquisition of United American Savings Bank or the September 2017 acquisition of Northern Hancock Bank and Trust Co. 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table details activity in the ALL and the recorded investment by portfolio segment based on impairment method: (Dollar amounts in thousands) Residential Home Commercial Commercial Consumer Total Three months ended March 31, 2018: Allowance for loan losses: Beginning Balance $ 2,090 $ 646 $ 2,753 $ 585 $ 53 $ 6,127 Charge-offs (62 ) (19 ) (385 ) — (119 ) (585 ) Recoveries 3 1 2 1 6 13 Provision (112 ) 23 381 (26 ) 114 380 Ending Balance $ 1,919 $ 651 $ 2,751 $ 560 $ 54 $ 5,935 At March 31, 2018: Ending ALL balance attributable to loans: Individually evaluated for impairment $ 6 $ — $ — $ — $ — $ 6 Acquired loans collectively evaluated for impairment — — — — — — Originated loans collectively evaluated for impairment 1,913 651 2,751 560 54 5,929 Total $ 1,919 $ 651 $ 2,751 $ 560 $ 54 $ 5,935 Total loans: Individually evaluated for impairment $ 419 $ 8 $ 336 $ 555 $ — $ 1,318 Acquired loans collectively evaluated for impairment 19,418 10,429 25,716 2,342 1,570 59,475 Originated loans collectively evaluated for impairment 204,853 89,804 170,736 56,303 7,688 529,384 Total $ 224,690 $ 100,241 $ 196,788 $ 59,200 $ 9,258 $ 590,177 At December 31, 2017: Ending ALL balance attributable to loans: Individually evaluated for impairment $ 7 $ — $ — $ — $ — $ 7 Acquired loans collectively evaluated for impairment — — — — — — Originated loans collectively evaluated for impairment 2,083 646 2,753 585 53 6,120 Total $ 2,090 $ 646 $ 2,753 $ 585 $ 53 $ 6,127 Total loans: Individually evaluated for impairment $ 425 $ 8 $ 914 $ 569 $ — $ 1,916 Acquired loans collectively evaluated for impairment 20,300 10,873 27,404 1,451 2,893 62,921 Originated loans collectively evaluated for impairment 201,098 89,059 164,750 56,921 6,696 518,524 Total $ 221,823 $ 99,940 $ 193,068 $ 58,941 $ 9,589 $ 583,361 Three months ended March 31, 2017: Allowance for loan losses: Beginning Balance $ 1,846 $ 633 $ 2,314 $ 700 $ 52 $ 5,545 Charge-offs (26 ) (1 ) — — (19 ) (46 ) Recoveries — 19 2 — 6 27 Provision 136 (3 ) 133 (117 ) 13 162 Ending Balance $ 1,956 $ 648 $ 2,449 $ 583 $ 52 $ 5,688 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary as of March 31, 2018 : (Dollar amounts in thousands) Impaired Loans with Specific Allowance As of March 31, 2018 For the three months ended March 31, 2018 Unpaid Principal Balance Recorded Investment Related Allowance Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 75 $ 75 $ 6 $ 75 $ 1 $ 1 Home equity and lines of credit 8 8 — 8 — — Commercial real estate — — — — — — Commercial business — — — — — — Consumer — — — — — — Total $ 83 $ 83 $ 6 $ 83 $ 1 $ 1 Impaired Loans with No Specific Allowance As of March 31, 2018 For the three months ended March 31, 2018 Unpaid Principal Balance Recorded Investment Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 456 $ 344 $ 347 $ 1 $ 1 Home equity and lines of credit — — — — — Commercial real estate 336 336 625 — — Commercial business 555 555 562 1 1 Consumer — — — — — Total $ 1,347 $ 1,235 $ 1,534 $ 2 $ 2 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary as of December 31, 2017 : (Dollar amounts in thousands) Impaired Loans with Specific Allowance As of December 31, 2017 For the year ended Unpaid Principal Balance Recorded Investment Related Allowance Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 75 $ 75 $ 7 $ 88 $ 3 $ 3 Home equity and lines of credit 8 8 — 2 — — Commercial real estate — — — 111 — — Commercial business — — — 118 — — Consumer — — — — — — Total $ 83 $ 83 $ 7 $ 319 $ 3 $ 3 Impaired Loans with No Specific Allowance As of December 31, For the year ended Unpaid Principal Balance Recorded Investment Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 461 $ 350 $ 289 $ 8 $ 8 Home equity and lines of credit — — — — — Commercial real estate 1,089 914 855 3 3 Commercial business 569 569 498 3 3 Consumer — — — — — Total $ 2,119 $ 1,833 $ 1,642 $ 14 $ 14 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary as of March 31, 2017 : (Dollar amounts in thousands) Impaired Loans with Specific Allowance As of March 31, 2017 For the three months Unpaid Principal Balance Recorded Investment Related Allowance Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 77 $ 77 $ 10 $ 106 $ 1 $ 1 Home equity and lines of credit — — — — — — Commercial real estate — — — 279 — — Commercial business — — — 294 — — Consumer — — — — — — Total $ 77 $ 77 $ 10 $ 679 $ 1 $ 1 Impaired Loans with No Specific Allowance As of March 31, 2017 For the three months Unpaid Principal Balance Recorded Investment Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 409 $ 372 $ 186 $ 7 $ 7 Home equity and lines of credit — — — — — Commercial real estate 1,165 991 724 1 1 Commercial business 641 641 369 — — Consumer — — — — — Total $ 2,215 $ 2,004 $ 1,279 $ 8 $ 8 Unpaid principal balance includes any loans that have been partially charged off but not forgiven. Accrued interest is not included in the recorded investment in loans presented above or in the tables that follow based on the amounts not being material. Troubled debt restructurings (TDR). The Corporation has certain loans that have been modified in order to maximize collection of loan balances. If, for economic or legal reasons related to the customer’s financial difficulties, management grants a concession compared to the original terms and conditions of the loan that it would not have otherwise considered, the modified loan is classified as a TDR. Concessions related to TDRs generally do not include forgiveness of principal balances. The Corporation generally does not extend additional credit to borrowers with loans classified as TDRs. At March 31, 2018 and December 31, 2017 , the Corporation had $427,000 and $433,000 , respectively, of loans classified as TDRs, which are included in impaired loans above. The Corporation had allocated $6,000 and $7,000 of specific allowance for these loans at March 31, 2018 and December 31, 2017 , respectively. During the three month period ended March 31, 2018 , the Corporation did no t modify any loans as TDRs. During the three month period ended March 31, 2017 , the Corporation modified one residential mortgage loan with a recorded investment of $323,000 due to a bankruptcy order. At March 31, 2017 , the Corporation did no t have any specific allowance for loan losses allocated to this specific loan. 4. Loans Receivable and Related Allowance for Loan Losses (continued) A loan is considered to be in payment default once it is 30 days contractually past due under the modified terms. During the three month periods ended March 31, 2018 and 2017, the Corporation did no t have any loans which were modified as TDRs for which there was a payment default within twelve months following the modification. Credit Quality Indicators. Management categorizes 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. Commercial real estate and commercial business loans not identified as impaired are evaluated as risk rated pools of loans utilizing a risk rating practice that is supported by a quarterly special asset review. In this review process, strengths and weaknesses are identified, evaluated and documented for each criticized and classified loan and borrower, strategic action plans are developed, risk ratings are confirmed and the loan’s performance status is reviewed. Management has determined certain portions of the loan portfolio to be homogeneous in nature and assigns like reserve factors for the following loan pool types: residential real estate, home equity loans and lines of credit, and consumer installment and personal lines of credit. The reserve allocation for risk rated loan pools is developed by applying the following factors: Historic : Management utilizes a computer model to develop the historical net charge-off experience which is used to formulate the assumptions employed in the migration analysis applied to estimate losses in the portfolio. Outstanding balance and charge-off information are input into the model and historical loss migration rate assumptions are developed to apply to pass, special mention, substandard and doubtful risk rated loans. A twelve-quarter rolling weighted-average is utilized to estimate probable incurred losses in the portfolios. Qualitative : Qualitative adjustment factors for pass, special mention, substandard and doubtful ratings are developed and applied to risk rated loans to allow for: quality of lending policies and procedures; national and local economic and business conditions; changes in the nature and volume of the portfolio; experiences, ability and depth of lending management; changes in trends, volume and severity of past due, nonaccrual and classified loans and loss and recovery trends; quality of loan review systems; concentrations of credit and other external factors. Management uses the following definitions for risk ratings: Pass : Loans classified as pass typically exhibit good payment performance and have underlying borrowers with acceptable financial trends where repayment capacity is evident. These borrowers typically would have a sufficient cash flow that would allow them to weather an economic downturn and the value of any underlying collateral could withstand a moderate degree of depreciation due to economic conditions. Special Mention : Loans classified as special mention are characterized by potential weaknesses that could jeopardize repayment as contractually agreed. These loans may exhibit adverse trends such as increasing leverage, shrinking profit margins and/or deteriorating cash flows. These borrowers would inherently be more vulnerable to the application of economic pressures. Substandard : Loans classified as substandard exhibit weaknesses that are well-defined to the point that repayment is jeopardized. Typically, the Corporation is no longer adequately protected by both the apparent net worth and repayment capacity of the borrower. Doubtful : Loans classified as doubtful have advanced to the point that collection or liquidation in full, on the basis of currently ascertainable facts, conditions and value, is highly questionable or improbable. 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents the classes of the loan portfolio summarized by the aggregate pass and the criticized categories of special mention, substandard and doubtful within the Corporation’s internal risk rating system as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Not Rated Pass Special Mention Substandard Doubtful Total March 31, 2018: Residential first mortgages $ 223,500 $ — $ — $ 1,190 $ — $ 224,690 Home equity and lines of credit 99,447 — — 794 — 100,241 Commercial real estate — 185,187 4,193 7,408 — 196,788 Commercial business — 57,240 394 1,566 — 59,200 Consumer 9,184 — — 74 — 9,258 Total $ 332,131 $ 242,427 $ 4,587 $ 11,032 $ — $ 590,177 December 31, 2017: Residential first mortgages $ 220,730 $ — $ — $ 1,093 $ — $ 221,823 Home equity and lines of credit 98,946 — — 994 — 99,940 Commercial real estate — 182,460 2,744 7,864 — 193,068 Commercial business — 56,960 477 1,504 — 58,941 Consumer 9,443 — — 146 — 9,589 Total $ 329,119 $ 239,420 $ 3,221 $ 11,601 $ — $ 583,361 4. Loans Receivable and Related Allowance for Loan Losses (continued) Management further monitors the performance and credit quality of the loan portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is past due. The following table presents the classes of the loan portfolio summarized by the aging categories of performing loans and nonperforming loans as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Performing Nonperforming Accruing Loans Not Past Due Accruing 30-59 Days Past Due Accruing 60-89 Days Past Due Accruing 90+ Days Past Due Nonaccrual Total March 31, 2018: Residential first mortgages $ 221,330 $ 1,979 $ 268 $ 231 $ 882 $ 224,690 Home equity and lines of credit 98,455 923 182 — 681 100,241 Commercial real estate 194,368 1,465 199 255 501 196,788 Commercial business 58,399 41 198 — 562 59,200 Consumer 8,959 182 72 — 45 9,258 Total loans $ 581,511 $ 4,590 $ 919 $ 486 $ 2,671 $ 590,177 December 31, 2017: Residential first mortgages $ 218,515 $ 1,936 $ 357 $ 159 $ 856 $ 221,823 Home equity and lines of credit 98,112 598 370 334 526 99,940 Commercial real estate 190,451 1,026 430 197 964 193,068 Commercial business 58,058 74 225 — 584 58,941 Consumer 9,162 273 81 — 73 9,589 Total loans $ 574,298 $ 3,907 $ 1,463 $ 690 $ 3,003 $ 583,361 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents the Corporation’s nonaccrual loans by aging category as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Not Past Due 30-59 Days Past Due 60-89 Days Past Due 90 Days + Past Due Total March 31, 2018: Residential first mortgages $ 361 $ 75 $ — $ 446 $ 882 Home equity and lines of credit 8 — — 673 681 Commercial real estate 330 96 — 75 501 Commercial business 555 — — 7 562 Consumer — — — 45 45 Total loans $ 1,254 $ 171 $ — $ 1,246 $ 2,671 December 31, 2017: Residential first mortgages 366 — 75 415 856 Home equity and lines of credit 8 — — 518 526 Commercial real estate 341 — — 623 964 Commercial business 569 — — 15 584 Consumer — — — 73 73 Total loans $ 1,284 $ — $ 75 $ 1,644 $ 3,003

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The following table summarizes the Corporation’s acquired goodwill and intangible assets as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) March 31, 2018 December 31, 2017 Gross Carrying Accumulated Gross Carrying Accumulated Goodwill $ 10,288 $ — $ 10,288 $ — Core deposit intangibles 4,426 4,013 4,426 3,945 Total $ 14,714 $ 4,013 $ 14,714 $ 3,945 Goodwill resulted from four acquisitions. Goodwill represents the excess of the total purchase price paid for the acquisitions over the fair value of the identifiable assets acquired, net of the fair value of the liabilities assumed. Goodwill is not amortized but is evaluated for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Impairment exists when a reporting unit’s carrying value of goodwill exceeds its fair value. The Corporation has selected November 30 as the date to perform the annual impairment test. No goodwill impairment charges were recorded during 2017 or in the first three months of 2018 . The core deposit intangible asset, resulting from three acquisitions, is amortized using the double declining balance method over a weighted average estimated life of the related deposits and is not estimated to have a significant residual value. During the three month periods ending March 31, 2018 and 2017, the Corporation recorded intangible amortization expense totaling $69,000 and $60,000 , respectively.

Stock Compensation Plan

Stock Compensation Plan	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Compensation Plan	Stock Compensation Plan In April 2014, the Corporation adopted the 2014 Stock Incentive Plan (the 2014 Plan), which is shareholder approved and permits the grant of restricted stock awards and options to its directors, officers and employees for up to 176,866 shares of common stock. As of March 31, 2018 , 52,533 shares of restricted stock and 88,433 stock options remain available for issuance under the plan. Incentive stock options, non-incentive or compensatory stock options and share awards may be granted under the Plan. The exercise price of each option shall at least equal the market price of a share of common stock on the date of grant and have a contractual term of ten years . Options shall vest and become exercisable at the rate, to the extent and subject to such limitations as may be specified by the Corporation. Compensation cost related to share-based payment transactions must be recognized in the financial statements with measurement based upon the fair value of the equity instruments issued. At March 31, 2018 there are no options available to be exercised under the Plan. A summary of the status of the Corporation’s nonvested restricted stock awards as of March 31, 2018 , and changes during the period then ended is presented below: Shares Weighted-Average Grant-date Fair Value Nonvested at January 1, 2018 33,400 $ 27.70 Granted — — Vested — — Forfeited — — Nonvested as of March 31, 2018 33,400 $ 27.70 For the three month periods ended March 31, 2018 and 2017, the Corporation recognized stock compensation expense of $75,000 and $55,000 , respectively. As of March 31, 2018 , there was $590,000 of total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan. That cost is expected to be recognized over the next three years . It is the Corporation’s policy to issue shares on the vesting date for restricted stock awards. Unvested restricted stock awards do not receive dividends declared by the Corporation.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Management uses its best judgment in estimating the fair value of the Corporation’s financial instruments; however, there are inherent weaknesses in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates herein are not necessarily indicative of the amounts the Corporation could have realized in a sale transaction or exit price on the date indicated. The estimated fair value amounts have been measured as of their respective dates and have not been re-evaluated or updated for purposes of these financial statements subsequent to those respective dates. As such, the estimated fair values of these financial instruments subsequent to the respective reporting dates may be different than the amounts reported. Fair value is the exchange price that would be received for an asset or paid to transfer a liability (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. There are three levels of inputs that may be used to measure fair value. Level 1 : Quoted prices (unadjusted) for identical assets or liabilities in active markets that the Corporation has the ability to access at 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. 7. Fair Value (continued) Level 3 : Significant unobservable inputs that reflect the Corporation’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. An asset or liability’s level is based on the lowest level of input that is significant to the fair value measurement. The Corporation used the following methods and significant assumptions to estimate the fair value of each type of financial instrument: Securities (debt-available for sale, equities) – The fair value of all investment securities are based upon the assumptions market participants would use in pricing the security. If available, investment securities are determined by quoted market prices (Level 1). Level 1 includes U.S. Treasury, federal agency securities and certain equity securities. For investment securities where quoted market prices are not available, fair values are calculated based on market prices on similar securities (Level 2). Level 2 includes U.S. Government sponsored entities and agencies, mortgage-backed securities, collateralized mortgage obligations, state and political subdivision securities and certain corporate debt securities. For investment securities where quoted prices or market prices of similar securities are not available, fair values are calculated by using unobservable inputs (Level 3) and may include certain corporate debt and equity securities held by the Corporation. The Level 3 corporate debt securities consist of certain subordinated notes which are priced at par because management has determined that the par value approximates the fair value of these instruments. The Level 3 equity security valuations were supported by an analysis prepared by the Corporation which relies on inputs such as the security issuer’s publicly attainable financial information, multiples derived from prices in observed transactions involving comparable businesses and other market, financial and nonfinancial factors. Impaired loans – At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Impaired loans carried at fair value generally receive a specific allowance for loan losses. For collateral dependent loans, fair value is commonly based on real estate appraisals. 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 independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted accordingly. As of March 31, 2018 and December 31, 2017, the Corporation did no t have any impaired loans carried at fair value measured using the fair value of collateral. There was no additional provision for loan losses recorded for impaired loans during the three month periods ended March 31, 2018 and 2017. Other real estate owned (OREO) – Assets acquired through or instead of foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to the valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. As of March 31, 2018 and December 31, 2017, the Corporation had no OREO measured at fair value. There was no expense recorded during the three month periods ended March 31, 2018 and 2017 associated with the write-down of OREO. Appraisals for both collateral-dependent impaired loans and OREO are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed by the Corporation. Once received, management reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. On an annual basis, the Corporation compares the actual selling price of OREO that has been sold to the most recent appraisal to determine what additional adjustment should be made to the appraisal value to arrive at fair value. The most recent analysis performed indicated that a discount of 10% should be applied. 7. Fair Value (continued) For assets measured at fair value on a recurring basis, the fair value measurements by level within the fair value hierarchy are as follows: (Dollar amounts in thousands) (Level 1) (Level 2) (Level 3) Description Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2018: Securities available for sale U.S. Treasury and federal agency $ 4,427 $ 4,427 $ — $ — U.S. government sponsored entities and agencies 13,739 — 13,739 — U.S. agency mortgage-backed securities: residential 23,466 — 23,466 — U.S. agency collateralized mortgage obligations: residential 21,333 — 21,333 — State and political subdivision 24,795 — 24,795 — Corporate debt securities 8,456 — 4,956 3,500 $ 96,216 $ 4,427 $ 88,289 $ 3,500 Equity securities $ 659 $ 633 $ — $ 25 December 31, 2017: Securities available for sale U.S. Treasury and federal agency 4,472 4,472 — — U.S. government sponsored entities and agencies 13,926 — 13,926 — U.S. agency mortgage-backed securities: residential 20,758 — 20,758 — U.S. agency collateralized mortgage obligations: residential 21,924 — 21,924 — State and political subdivisions 29,240 — 29,240 — Corporate debt securities 9,030 — 1,032 7,998 $ 99,350 $ 4,472 $ 86,880 $ 7,998 Equity securities $ 1,817 $ 1,683 $ — $ 134 7. Fair Value (continued) The Corporation’s policy is to transfer assets or liabilities from one level to another when the methodology to obtain the fair value changes such that there are more or fewer unobservable inputs as of the end of the reporting period. During the three month period ended March 31, 2018 the Corporation reclassified a restricted bank stock from the equity security portfolio to other assets and certain corporate securities from Level 3 to Level 2. For the same period in 2017 , the Corporation had no transfers between levels. The following table presents changes in Level 3 assets measured on a recurring basis for the three month periods ended March 31, 2018 and 2017 : (Dollar amounts in thousands) Three months ended March 31, 2018 2017 Balance at the beginning of the period $ 8,132 $ 136 Total gains or losses (realized/unrealized): Included in earnings 1 — Included in other comprehensive income — — Acquired — — Transfers in and/or out of Level 3 (4,608 ) — Balance at the end of the period $ 3,525 $ 136 The Corporation had no assets measured at fair value on a non-recurring basis at March 31, 2018 and December 31, 2017. The Corporation had an impaired residential mortgage loan totaling $69,000 and an impaired home equity loan totaling $7,000 at March 31, 2018 which were classified as TDRs and measured using a discounted cash flow methodology. At December 31, 2017 these loans were valued at $68,000 and $8,000 , respectively. 7. Fair Value (continued) The following table sets forth the carrying amount and estimated fair values of the Corporation’s financial instruments included in the consolidated balance sheet as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Carrying Fair Value Measurements using: Description Amount Total Level 1 Level 2 Level 3 March 31, 2018: Financial Assets: Cash and cash equivalents $ 17,177 $ 17,177 $ 17,177 $ — $ — Securities - available for sale 96,216 96,216 4,427 88,290 3,500 Securities - equities 659 659 633 — 25 Loans held for sale 239 239 — 239 — Loans, net 584,242 575,740 — — 575,740 Federal bank stock 4,329 — N/A N/A N/A Accrued interest receivable 2,236 2,236 61 353 1,822 $ 705,098 $ 692,267 $ 22,298 $ 88,882 $ 581,087 Financial Liabilities: Deposits 666,735 669,069 495,530 173,539 — Borrowed funds 20,300 19,984 — 19,984 — Accrued interest payable 367 367 24 343 — $ 687,402 $ 689,420 $ 495,554 $ 193,866 $ — Carrying Fair Value Measurements using: Amount Total Level 1 Level 2 Level 3 December 31, 2017: Financial Assets: Cash and cash equivalents $ 14,374 $ 14,374 $ 14,374 $ — $ — Securities - available for sale 99,350 99,350 4,472 86,880 7,998 Securities - equities 1,817 1,817 1,683 — 134 Loans held for sale 504 504 — 504 — Loans, net 577,234 577,616 — — 577,616 Federal bank stock 4,662 — N/A N/A N/A Accrued interest receivable 2,217 2,217 59 338 1,820 $ 700,158 $ 695,878 $ 20,588 $ 87,722 $ 587,568 Financial Liabilities: Deposits 654,643 657,414 483,956 173,458 — Borrowed funds 26,000 25,499 — 25,499 — Accrued interest payable 413 413 23 390 — $ 681,056 $ 683,326 $ 483,979 $ 199,347 $ —

Regulatory Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2018
Banking and Thrift [Abstract]
Regulatory Matters	Regulatory Matters Banks and bank holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action 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 initiate regulatory action. In 2015, the Board of Governors of the Federal Reserve System amended its Small Bank Holding Company Policy Statement by increasing the policy’s consolidated assets threshold from $500 million to $1 billion. The primary benefit of being deemed a "small bank holding company" is the exemption from the requirement to maintain consolidated regulatory capital ratios; instead, regulatory capital ratios only apply at the subsidiary bank level. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (BASEL III rules) became effective for the Bank 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. Under the BASEL III rules, the 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 2018 is 1.875% and was 1.25% for 2017 and 0.625% for 2016. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital. Management believes as of March 31, 2018 , the Bank meets all capital adequacy requirements to which they are subject. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized and critically undercapitalized, although these terms are not used to 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, and capital restoration plans are required. At March 31, 2018 , the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the institution's category. The following table sets forth certain information concerning the Bank’s regulatory capital as of the dates presented. The capital adequacy ratios disclosed below are exclusive of the capital conservation buffer. (Dollar amounts in thousands) March 31, 2018 December 31, 2017 Amount Ratio Amount Ratio Total capital to risk-weighted assets: Actual $ 64,463 12.96 % $ 64,221 12.96 % For capital adequacy purposes 39,797 8.00 % 39,630 8.00 % To be well capitalized 49,746 10.00 % 49,537 10.00 % Tier 1 capital to risk-weighted assets: Actual $ 58,528 11.77 % $ 58,088 11.73 % For capital adequacy purposes 29,848 6.00 % 29,722 6.00 % To be well capitalized 39,797 8.00 % 39,630 8.00 % Common Equity Tier 1 capital to risk-weighted assets: Actual $ 58,528 11.77 % $ 58,088 11.73 % For capital adequacy purposes 22,386 4.50 % 22,292 4.50 % To be well capitalized 32,335 6.50 % 32,199 6.50 % Tier 1 capital to average assets: Actual $ 58,528 7.92 % $ 58,088 7.71 % For capital adequacy purposes 29,571 4.00 % 30,117 4.00 % To be well capitalized 36,964 5.00 % 37,647 5.00 %

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following tables summarize the changes within each classification of accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2018 and 2017 and summarizes the significant amounts reclassified out of each component of accumulated other comprehensive income: (Dollar amounts in thousands) Unrealized Gains and Losses on Available-for-Sale Securities Defined Benefit Pension Items Totals Accumulated Other Comprehensive Income (Loss) at January 1, 2018, as previously presented $ (679 ) $ (4,839 ) $ (5,518 ) Cumulative effect of change in accounting principle for marketable equity securities, net of tax $ (187 ) $ — $ (187 ) Accumulated Other Comprehensive Income (Loss) at January 1, 2018, as adjusted $ (866 ) $ (4,839 ) $ (5,705 ) Other comprehensive income before reclassification (1,038 ) — (1,038 ) Amounts reclassified from accumulated other comprehensive income (loss) 23 — 23 Net current period other comprehensive income (1,015 ) — (1,015 ) Accumulated Other Comprehensive Income (Loss) at March 31, 2018 $ (1,881 ) $ (4,839 ) $ (6,720 ) (Dollar amounts in thousands) Details about Accumulated Other Comprehensive Loss Components Amount Reclassified Affected Line Item in the Statement Where Net Income is Presented Unrealized gains and losses on available-for-sale securities $ (29 ) Net gain on sale of securities 6 Provision for income taxes Total reclassifications for the period $ (23 ) Net of tax (Dollar amounts in thousands) Unrealized Gains and Losses on Available-for-Sale Securities Defined Benefit Pension Items Totals Accumulated Other Comprehensive Income (Loss) at January 1, 2017 $ (679 ) $ (3,812 ) $ (4,491 ) Other comprehensive income before reclassification 258 — 258 Amounts reclassified from accumulated other comprehensive income (loss) — — — Net current period other comprehensive income 258 — 258 Accumulated Other Comprehensive Income (Loss) at March 31, 2017 $ (421 ) $ (3,812 ) $ (4,233 ) There were no amounts reclassified out of accumulated other comprehensive income for the three months ended March 31, 2017.

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition On January 1, 2018, the Corporation adopted ASU 2014-09 "Revenue from Contracts with Customers" (Topic 606) and all subsequent ASUs that modified Topic 606. Interest income, net securities gains (losses) and bank-owned life insurance are not included within the scope of Topic 606. For the revenue streams in the scope of Topic 606, service charges on deposits and electronic banking fees, there are no significant judgments related to the amount and timing of revenue recognition. All of the Corporation's revenue from contracts with customers is recognized within noninterest income. Service charges on deposits: The Corporation earns fees from its deposit customers for transaction-based, account maintenance and overdraft services. Transaction-based fees, which include services such stop payment charges, statement rendering and other fees, are recognized at the time the transaction is executed as that is the point in time the Corporation fulfills the customer's request. Account maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which the Corporation satisfies the performance obligation. Overdraft fees are recognized at the point in time that the overdraft occurs. Service charges on deposits are withdrawn from the customer's account balance. Electronic banking fees: The Corporation earns interchange and other ATM related fees from cardholder transactions conducted through the various payment networks. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. The gross amount of these fees are processed through noninterest income. Other fees, such a transaction surcharges and card replacement fees are withdrawn from the customer's account balance at the time of service. The following table presents the Corporation's sources of noninterest income for the three months ended March 31, 2018 and 2017. For the three months ended March 31, 2018 2,018 2017 Noninterest income In-scope of Topic 606: Service charges on deposits Maintenance fees $ 39 $ 39 Overdraft fees 329 298 Other fees 69 71 Electronic banking fees 315 270 Noninterest income (in-scope of Topic 606) 752 678 Noninterest income (out-of-scope of Topic 606) (1) 147 178 Total noninterest income $ 899 $ 856 (1) Noninterest income items that are out-of-scope include net realized gains (losses) on sales of securities, net gains (losses) on sales of loans, earnings on bank-owned life insurance and certain other noninterest income items.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Newly Issued Not Yet Effective Accounting Standards In February 2016, the FASB issued ASU 2016-02 "Leases". This ASU requires lessees to record most leases on their balance sheet but recognize expenses in the income statement in a manner similar to current accounting treatment. This ASU changes the guidance on sale-leaseback transactions, initial direct costs and lease execution costs, and, for lessors, modifies the classification criteria and the accounting for sales-type and direct financing leases. ASU 2016-02 is effective for annual periods beginning after December 15, 2018, and interim periods therein. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. The Corporation is currently analyzing data on leased assets. The adoption of this guidance is expected to increase both assets and liabilities, but is not expected to have a material impact on the consolidated statement of income. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. ASU 2016-13 significantly changes the way impairment of financial instruments is recognized by requiring immediate recognition of estimated credit losses expected to occur over the remaining life of the financial instruments. The main provisions of the guidance include (1) replacing the “incurred loss” approach under current GAAP with an “expected loss” model for instruments measured at amortized cost, (2) requiring entities to record an allowance for available-for-sale debt securities rather than reduce the carrying amount of the investments, as is required by the other-than-temporary impairment model under current GAAP, and (3) a simplified accounting model for purchased credit-impaired debt securities and loans. The ASU is effective for interim and annual reporting periods beginning after December 15, 2019, although early adoption is permitted. Management is currently in the developmental stages of collecting available historical information in order to assess the expected credit losses and determine the impact of the adoption of ASU 2016-13 on the Corporation's financial statements. In January 2017, FASB ASU 2017-04, "Simplifying the Test for Goodwill Impairment". This ASU simplifies the measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Instead, under this amendment, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss should not exceed the total amount of goodwill allocated to that reporting unit. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Corporation has goodwill from prior business combinations and performs an annual impairment test or more frequently if changes or circumstances occur that would more likely than not reduce the fair value of the reporting unit below its carrying value. The Corporation's most recent annual impairment assessment determined that the Corporation's goodwill was not impaired. Although the Corporation cannot anticipate future goodwill impairment assessments, based on the most recent assessment it is unlikely that an impairment amount would need to be calculated and, therefore, does not anticipate a material impact from these amendments to the Corporation's financial position and results of operations. The current accounting policies and processes are not anticipated to change, except for the elimination of the Step 2 analysis. In March 2017, the FASB issued ASU 2017-08, “Receivable - Nonrefundable Fees and Other Costs (Subtopic 310-20) Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 amends guidance on the amortization period of premiums on certain purchased callable debt securities to shorten the amortization period of premiums on certain purchased callable debt securities to the earliest call date. The amendments are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. The Corporation is currently evaluating the potential impact of ASU 2016-02 on its financial statements and disclosures. 11. Recent Accounting Pronouncements (continued) In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." The amendments in this Update are to better reflect the economic results of hedging in the financial statements along with simplification of certain hedge accounting requirements. Specifically, the entire change in the fair value of the hedging instrument is required to be presented in the same income statement line as and in the same period that the earnings effect of the hedged item is recognized. Therefore, hedge ineffectiveness will not be reported separately or in a different period. In addition, hedge effectiveness can be determined qualitatively in periods following inception. The amendments permit an entity to measure the change in fair value of the hedged item on the basis of the benchmark rate component. They also permit an entity to measure the hedged item in a partial-term fair value hedge of interest rate risk by assuming the hedged item has a term that reflects only the designated cash flows being hedged. For a closed portfolio of prepayable financial assets, an entity is permitted to designate the amount that is not expected to be affected by prepayments or defaults as the hedged item. For public business entities, the new guidance is effective for fiscal years beginning after December 15, 2018, and interim periods therein. Early adoption is permitted. The Corporation is currently evaluating the impact of adopting the new guidance on the consolidated financial statements, but it is not expected to have a material impact. Adoption of New Accounting Policies In March 2017, the FASB issued ASU 2017-07, "Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." The amendments in this update require that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. The amendments in this update improve the consistency, transparency, and usefulness of financial information to users that have communicated that the service cost component generally is analyzed differently from the other components of net benefit cost. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The adoption of the new guidance did not have a material impact on the consolidated financial statements. In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-9 “Revenue from Contracts with Customers”. ASU 2014-9 provides guidance 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 and services. The guidance does not apply to revenue associated with financial instruments, including loans and securities. The Corporation has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary. The Corporation generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. The Corporation has evaluated revenue streams within noninterest income to assess the applicability of this guidance and determined that service charges on deposits and electronic banking fees within the scope of this ASU. Because performance obligations are satisfied as services are rendered and the fees are fixed, there is little judgment involved in applying the guidance that significantly affects the determination of the amount and timing of revenue from contracts with customers. The adoption of this guidance on January 1, 2018 did not have a material impact on the Corporation's financial statements. In January 2016, the FASB issued ASU 2016-1 “Recognition and Measurement of Financial Assets and Financial Liabilities”. ASU 2016-1 revises the accounting for the classification and measurement of investments in equity securities and revises the presentation of certain fair value changes for financial liabilities measured at fair value. For equity securities, the guidance in ASU 2016-1 requires equity investments to be measured at fair value with changes in fair value recognized in net income. For financial liabilities that are measured at fair value in accordance with the fair value option, the guidance requires presenting in other comprehensive income the change in fair value that relates to a change in instrument-specific credit risk. ASU 2016-1 also eliminates the disclosure assumptions used to estimate fair value for financial instruments measured at amortized cost and requires disclosure of an exit price notion in determining the fair value of financial instruments measured at amortized cost. ASU 2016-1 was effective for interim and annual periods beginning after December 15, 2017. The adoption of ASU 2016-1 did not have a significant impact on the Corporation's financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force” . ASU 2016-15 clarifies the presentation of specific types of cash flow receipts and payments, including the payment of debt prepayment or debt extinguishment costs, contingent consideration cash payments paid subsequent to the acquisition date and proceeds from settlement of BOLI policies. This guidance was effective for fiscal years beginning after December 15, 2017. The adoption of ASU 2016-15 did not have an impact the Corporation's financial statements and disclosures.

Recent Accounting Pronounceme20

Recent Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Newly Issued Not Yet Effective Accounting Standards In February 2016, the FASB issued ASU 2016-02 "Leases". This ASU requires lessees to record most leases on their balance sheet but recognize expenses in the income statement in a manner similar to current accounting treatment. This ASU changes the guidance on sale-leaseback transactions, initial direct costs and lease execution costs, and, for lessors, modifies the classification criteria and the accounting for sales-type and direct financing leases. ASU 2016-02 is effective for annual periods beginning after December 15, 2018, and interim periods therein. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. The Corporation is currently analyzing data on leased assets. The adoption of this guidance is expected to increase both assets and liabilities, but is not expected to have a material impact on the consolidated statement of income. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. ASU 2016-13 significantly changes the way impairment of financial instruments is recognized by requiring immediate recognition of estimated credit losses expected to occur over the remaining life of the financial instruments. The main provisions of the guidance include (1) replacing the “incurred loss” approach under current GAAP with an “expected loss” model for instruments measured at amortized cost, (2) requiring entities to record an allowance for available-for-sale debt securities rather than reduce the carrying amount of the investments, as is required by the other-than-temporary impairment model under current GAAP, and (3) a simplified accounting model for purchased credit-impaired debt securities and loans. The ASU is effective for interim and annual reporting periods beginning after December 15, 2019, although early adoption is permitted. Management is currently in the developmental stages of collecting available historical information in order to assess the expected credit losses and determine the impact of the adoption of ASU 2016-13 on the Corporation's financial statements. In January 2017, FASB ASU 2017-04, "Simplifying the Test for Goodwill Impairment". This ASU simplifies the measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Instead, under this amendment, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss should not exceed the total amount of goodwill allocated to that reporting unit. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Corporation has goodwill from prior business combinations and performs an annual impairment test or more frequently if changes or circumstances occur that would more likely than not reduce the fair value of the reporting unit below its carrying value. The Corporation's most recent annual impairment assessment determined that the Corporation's goodwill was not impaired. Although the Corporation cannot anticipate future goodwill impairment assessments, based on the most recent assessment it is unlikely that an impairment amount would need to be calculated and, therefore, does not anticipate a material impact from these amendments to the Corporation's financial position and results of operations. The current accounting policies and processes are not anticipated to change, except for the elimination of the Step 2 analysis. In March 2017, the FASB issued ASU 2017-08, “Receivable - Nonrefundable Fees and Other Costs (Subtopic 310-20) Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 amends guidance on the amortization period of premiums on certain purchased callable debt securities to shorten the amortization period of premiums on certain purchased callable debt securities to the earliest call date. The amendments are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. The Corporation is currently evaluating the potential impact of ASU 2016-02 on its financial statements and disclosures. 11. Recent Accounting Pronouncements (continued) In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." The amendments in this Update are to better reflect the economic results of hedging in the financial statements along with simplification of certain hedge accounting requirements. Specifically, the entire change in the fair value of the hedging instrument is required to be presented in the same income statement line as and in the same period that the earnings effect of the hedged item is recognized. Therefore, hedge ineffectiveness will not be reported separately or in a different period. In addition, hedge effectiveness can be determined qualitatively in periods following inception. The amendments permit an entity to measure the change in fair value of the hedged item on the basis of the benchmark rate component. They also permit an entity to measure the hedged item in a partial-term fair value hedge of interest rate risk by assuming the hedged item has a term that reflects only the designated cash flows being hedged. For a closed portfolio of prepayable financial assets, an entity is permitted to designate the amount that is not expected to be affected by prepayments or defaults as the hedged item. For public business entities, the new guidance is effective for fiscal years beginning after December 15, 2018, and interim periods therein. Early adoption is permitted. The Corporation is currently evaluating the impact of adopting the new guidance on the consolidated financial statements, but it is not expected to have a material impact. Adoption of New Accounting Policies In March 2017, the FASB issued ASU 2017-07, "Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." The amendments in this update require that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. The amendments in this update improve the consistency, transparency, and usefulness of financial information to users that have communicated that the service cost component generally is analyzed differently from the other components of net benefit cost. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The adoption of the new guidance did not have a material impact on the consolidated financial statements. In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-9 “Revenue from Contracts with Customers”. ASU 2014-9 provides guidance 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 and services. The guidance does not apply to revenue associated with financial instruments, including loans and securities. The Corporation has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary. The Corporation generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. The Corporation has evaluated revenue streams within noninterest income to assess the applicability of this guidance and determined that service charges on deposits and electronic banking fees within the scope of this ASU. Because performance obligations are satisfied as services are rendered and the fees are fixed, there is little judgment involved in applying the guidance that significantly affects the determination of the amount and timing of revenue from contracts with customers. The adoption of this guidance on January 1, 2018 did not have a material impact on the Corporation's financial statements. In January 2016, the FASB issued ASU 2016-1 “Recognition and Measurement of Financial Assets and Financial Liabilities”. ASU 2016-1 revises the accounting for the classification and measurement of investments in equity securities and revises the presentation of certain fair value changes for financial liabilities measured at fair value. For equity securities, the guidance in ASU 2016-1 requires equity investments to be measured at fair value with changes in fair value recognized in net income. For financial liabilities that are measured at fair value in accordance with the fair value option, the guidance requires presenting in other comprehensive income the change in fair value that relates to a change in instrument-specific credit risk. ASU 2016-1 also eliminates the disclosure assumptions used to estimate fair value for financial instruments measured at amortized cost and requires disclosure of an exit price notion in determining the fair value of financial instruments measured at amortized cost. ASU 2016-1 was effective for interim and annual periods beginning after December 15, 2017. The adoption of ASU 2016-1 did not have a significant impact on the Corporation's financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force” . ASU 2016-15 clarifies the presentation of specific types of cash flow receipts and payments, including the payment of debt prepayment or debt extinguishment costs, contingent consideration cash payments paid subsequent to the acquisition date and proceeds from settlement of BOLI policies. This guidance was effective for fiscal years beginning after December 15, 2017. The adoption of ASU 2016-15 did not have an impact the Corporation's financial statements and disclosures.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The factors used in the Corporation’s earnings per common share computation follow: (Dollar amounts in thousands, except for per share amounts) For the three months ended March 31, 2018 2017 Earnings per common share - basic Net income $ 1,362 $ 956 Average common shares outstanding 2,271,139 2,152,358 Basic earnings per common share $ 0.60 $ 0.44 Earnings per common share - diluted Net income $ 1,362 $ 956 Average common shares outstanding 2,271,139 2,152,358 Add: Dilutive effects of assumed issuance of restricted stock and exercise of stock options 14,176 15,656 Average shares and dilutive potential common shares 2,285,315 2,168,014 Diluted earnings per common share $ 0.60 $ 0.44 Stock options not considered in computing earnings per share because they were antidilutive — —

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of Classification of Available for Sale Securities Investment	The following table summarizes the Corporation’s debt securities as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value March 31, 2018: U.S. Treasury and federal agency $ 4,538 $ — $ (111 ) $ 4,427 U.S. government sponsored entities and agencies 14,126 — (387 ) 13,739 U.S. agency mortgage-backed securities: residential 23,957 4 (495 ) 23,466 U.S. agency collateralized mortgage obligations: residential 22,204 33 (904 ) 21,333 State and political subdivisions 25,265 10 (480 ) 24,795 Corporate debt securities 8,508 15 (67 ) 8,456 $ 98,598 $ 62 $ (2,444 ) $ 96,216 December 31, 2017: U.S. Treasury and federal agency 4,541 — (69 ) 4,472 U.S. government sponsored entities and agencies 14,136 2 (212 ) 13,926 U.S. agency mortgage-backed securities: residential 20,904 7 (153 ) 20,758 U.S. agency collateralized mortgage obligations: residential 22,607 25 (708 ) 21,924 State and political subdivisions 29,249 87 (96 ) 29,240 Corporate debt securities 9,009 38 (17 ) 9,030 $ 100,446 $ 159 $ (1,255 ) $ 99,350 The following table summarizes scheduled maturities of the Corporation’s debt securities as of March 31, 2018 . Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Mortgage-backed securities and collateralized mortgage obligations are not due at a single maturity and are shown separately. (Dollar amounts in thousands) Available for sale Amortized Cost Fair Value Due in one year or less $ 3,350 $ 3,336 Due after one year through five years 26,768 26,231 Due after five through ten years 18,825 18,454 Due after ten years 3,494 3,396 Mortgage-backed securities: residential 23,957 23,466 Collateralized mortgage obligations: residential 22,204 21,333 $ 98,598 $ 96,216
Schedule of Unrealized Loss on Investments	Information pertaining to debt securities with gross unrealized losses at March 31, 2018 and December 31, 2017 , aggregated by investment category and length of time that individual securities have been in a continuous loss position are included in the table below: (Dollar amounts in thousands) Less than 12 Months 12 Months or More Total Description of Securities Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss March 31, 2018: U.S. Treasury and federal agency $ — $ — $ 4,427 $ (111 ) $ 4,427 $ (111 ) U.S. government sponsored entities and agencies 4,866 (125 ) 8,873 (262 ) 13,739 (387 ) U.S. agency mortgage-backed securities: residential 13,565 (289 ) 6,256 (206 ) 19,821 (495 ) U.S. agency collateralized mortgage obligations: residential 1,935 (7 ) 17,567 (897 ) 19,502 (904 ) State and political subdivisions 18,824 (412 ) 2,387 (68 ) 21,211 (480 ) Corporate debt securities 2,942 (65 ) 500 (2 ) 3,442 (67 ) $ 42,132 $ (898 ) $ 40,010 $ (1,546 ) $ 82,142 $ (2,444 ) December 31, 2017: U.S. Treasury and federal agency $ — $ — $ 4,472 $ (69 ) $ 4,472 $ (69 ) U.S. government sponsored entities and agencies 3,447 (42 ) 8,975 (170 ) 12,422 (212 ) U.S. agency mortgage-backed securities: residential 9,659 (48 ) 6,581 (105 ) 16,240 (153 ) U.S. agency collateralized mortgage obligations: residential 954 (16 ) 19,147 (692 ) 20,101 (708 ) State and political subdivisions 10,510 (60 ) 3,487 (36 ) 13,997 (96 ) Corporate debt securities 2,992 (16 ) 999 (1 ) 3,991 (17 ) $ 27,562 $ (182 ) $ 43,661 $ (1,073 ) $ 71,223 $ (1,255 )
Available-for-sale Securities	Losses on sales of securities for the three months ended March 31 were as follows: (Dollar amounts in thousands) For the three months 2018 2017 Proceeds $ 6,531 $ — Losses (29 ) — Tax provision related to losses (6 ) —

Loans Receivable and Related 23

Loans Receivable and Related Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Schedule of Classification of Loans Receivable	The Corporation’s loans receivable as of the respective dates are summarized as follows: (Dollar amounts in thousands) March 31, December 31, Mortgage loans on real estate: Residential first mortgages $ 224,690 $ 221,823 Home equity loans and lines of credit 100,241 99,940 Commercial real estate 196,788 193,068 521,719 514,831 Other loans: Commercial business 59,200 58,941 Consumer 9,258 9,589 68,458 68,530 Total loans, gross 590,177 583,361 Less allowance for loan losses 5,935 6,127 Total loans, net $ 584,242 $ 577,234
Allowance for Credit Losses on Financing Receivables	The following table details activity in the ALL and the recorded investment by portfolio segment based on impairment method: (Dollar amounts in thousands) Residential Home Commercial Commercial Consumer Total Three months ended March 31, 2018: Allowance for loan losses: Beginning Balance $ 2,090 $ 646 $ 2,753 $ 585 $ 53 $ 6,127 Charge-offs (62 ) (19 ) (385 ) — (119 ) (585 ) Recoveries 3 1 2 1 6 13 Provision (112 ) 23 381 (26 ) 114 380 Ending Balance $ 1,919 $ 651 $ 2,751 $ 560 $ 54 $ 5,935 At March 31, 2018: Ending ALL balance attributable to loans: Individually evaluated for impairment $ 6 $ — $ — $ — $ — $ 6 Acquired loans collectively evaluated for impairment — — — — — — Originated loans collectively evaluated for impairment 1,913 651 2,751 560 54 5,929 Total $ 1,919 $ 651 $ 2,751 $ 560 $ 54 $ 5,935 Total loans: Individually evaluated for impairment $ 419 $ 8 $ 336 $ 555 $ — $ 1,318 Acquired loans collectively evaluated for impairment 19,418 10,429 25,716 2,342 1,570 59,475 Originated loans collectively evaluated for impairment 204,853 89,804 170,736 56,303 7,688 529,384 Total $ 224,690 $ 100,241 $ 196,788 $ 59,200 $ 9,258 $ 590,177 At December 31, 2017: Ending ALL balance attributable to loans: Individually evaluated for impairment $ 7 $ — $ — $ — $ — $ 7 Acquired loans collectively evaluated for impairment — — — — — — Originated loans collectively evaluated for impairment 2,083 646 2,753 585 53 6,120 Total $ 2,090 $ 646 $ 2,753 $ 585 $ 53 $ 6,127 Total loans: Individually evaluated for impairment $ 425 $ 8 $ 914 $ 569 $ — $ 1,916 Acquired loans collectively evaluated for impairment 20,300 10,873 27,404 1,451 2,893 62,921 Originated loans collectively evaluated for impairment 201,098 89,059 164,750 56,921 6,696 518,524 Total $ 221,823 $ 99,940 $ 193,068 $ 58,941 $ 9,589 $ 583,361 Three months ended March 31, 2017: Allowance for loan losses: Beginning Balance $ 1,846 $ 633 $ 2,314 $ 700 $ 52 $ 5,545 Charge-offs (26 ) (1 ) — — (19 ) (46 ) Recoveries — 19 2 — 6 27 Provision 136 (3 ) 133 (117 ) 13 162 Ending Balance $ 1,956 $ 648 $ 2,449 $ 583 $ 52 $ 5,688
Schedule of Impaired Loans with and without a Specific Allowance	The following table presents impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary as of March 31, 2018 : (Dollar amounts in thousands) Impaired Loans with Specific Allowance As of March 31, 2018 For the three months ended March 31, 2018 Unpaid Principal Balance Recorded Investment Related Allowance Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 75 $ 75 $ 6 $ 75 $ 1 $ 1 Home equity and lines of credit 8 8 — 8 — — Commercial real estate — — — — — — Commercial business — — — — — — Consumer — — — — — — Total $ 83 $ 83 $ 6 $ 83 $ 1 $ 1 Impaired Loans with No Specific Allowance As of March 31, 2018 For the three months ended March 31, 2018 Unpaid Principal Balance Recorded Investment Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 456 $ 344 $ 347 $ 1 $ 1 Home equity and lines of credit — — — — — Commercial real estate 336 336 625 — — Commercial business 555 555 562 1 1 Consumer — — — — — Total $ 1,347 $ 1,235 $ 1,534 $ 2 $ 2 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary as of December 31, 2017 : (Dollar amounts in thousands) Impaired Loans with Specific Allowance As of December 31, 2017 For the year ended Unpaid Principal Balance Recorded Investment Related Allowance Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 75 $ 75 $ 7 $ 88 $ 3 $ 3 Home equity and lines of credit 8 8 — 2 — — Commercial real estate — — — 111 — — Commercial business — — — 118 — — Consumer — — — — — — Total $ 83 $ 83 $ 7 $ 319 $ 3 $ 3 Impaired Loans with No Specific Allowance As of December 31, For the year ended Unpaid Principal Balance Recorded Investment Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 461 $ 350 $ 289 $ 8 $ 8 Home equity and lines of credit — — — — — Commercial real estate 1,089 914 855 3 3 Commercial business 569 569 498 3 3 Consumer — — — — — Total $ 2,119 $ 1,833 $ 1,642 $ 14 $ 14 4. Loans Receivable and Related Allowance for Loan Losses (continued) The following table presents impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary as of March 31, 2017 : (Dollar amounts in thousands) Impaired Loans with Specific Allowance As of March 31, 2017 For the three months Unpaid Principal Balance Recorded Investment Related Allowance Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 77 $ 77 $ 10 $ 106 $ 1 $ 1 Home equity and lines of credit — — — — — — Commercial real estate — — — 279 — — Commercial business — — — 294 — — Consumer — — — — — — Total $ 77 $ 77 $ 10 $ 679 $ 1 $ 1 Impaired Loans with No Specific Allowance As of March 31, 2017 For the three months Unpaid Principal Balance Recorded Investment Average Recorded Investment Interest Income Recognized in Period Cash Basis Interest Recognized in Period Residential first mortgages $ 409 $ 372 $ 186 $ 7 $ 7 Home equity and lines of credit — — — — — Commercial real estate 1,165 991 724 1 1 Commercial business 641 641 369 — — Consumer — — — — — Total $ 2,215 $ 2,004 $ 1,279 $ 8 $ 8
Financing Receivable Credit Quality Indicators	The following table presents the classes of the loan portfolio summarized by the aggregate pass and the criticized categories of special mention, substandard and doubtful within the Corporation’s internal risk rating system as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Not Rated Pass Special Mention Substandard Doubtful Total March 31, 2018: Residential first mortgages $ 223,500 $ — $ — $ 1,190 $ — $ 224,690 Home equity and lines of credit 99,447 — — 794 — 100,241 Commercial real estate — 185,187 4,193 7,408 — 196,788 Commercial business — 57,240 394 1,566 — 59,200 Consumer 9,184 — — 74 — 9,258 Total $ 332,131 $ 242,427 $ 4,587 $ 11,032 $ — $ 590,177 December 31, 2017: Residential first mortgages $ 220,730 $ — $ — $ 1,093 $ — $ 221,823 Home equity and lines of credit 98,946 — — 994 — 99,940 Commercial real estate — 182,460 2,744 7,864 — 193,068 Commercial business — 56,960 477 1,504 — 58,941 Consumer 9,443 — — 146 — 9,589 Total $ 329,119 $ 239,420 $ 3,221 $ 11,601 $ — $ 583,361
Past Due Financing Receivables	The following table presents the classes of the loan portfolio summarized by the aging categories of performing loans and nonperforming loans as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Performing Nonperforming Accruing Loans Not Past Due Accruing 30-59 Days Past Due Accruing 60-89 Days Past Due Accruing 90+ Days Past Due Nonaccrual Total March 31, 2018: Residential first mortgages $ 221,330 $ 1,979 $ 268 $ 231 $ 882 $ 224,690 Home equity and lines of credit 98,455 923 182 — 681 100,241 Commercial real estate 194,368 1,465 199 255 501 196,788 Commercial business 58,399 41 198 — 562 59,200 Consumer 8,959 182 72 — 45 9,258 Total loans $ 581,511 $ 4,590 $ 919 $ 486 $ 2,671 $ 590,177 December 31, 2017: Residential first mortgages $ 218,515 $ 1,936 $ 357 $ 159 $ 856 $ 221,823 Home equity and lines of credit 98,112 598 370 334 526 99,940 Commercial real estate 190,451 1,026 430 197 964 193,068 Commercial business 58,058 74 225 — 584 58,941 Consumer 9,162 273 81 — 73 9,589 Total loans $ 574,298 $ 3,907 $ 1,463 $ 690 $ 3,003 $ 583,361
Schedule of Financing Receivables, Non Accrual Status	The following table presents the Corporation’s nonaccrual loans by aging category as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Not Past Due 30-59 Days Past Due 60-89 Days Past Due 90 Days + Past Due Total March 31, 2018: Residential first mortgages $ 361 $ 75 $ — $ 446 $ 882 Home equity and lines of credit 8 — — 673 681 Commercial real estate 330 96 — 75 501 Commercial business 555 — — 7 562 Consumer — — — 45 45 Total loans $ 1,254 $ 171 $ — $ 1,246 $ 2,671 December 31, 2017: Residential first mortgages 366 — 75 415 856 Home equity and lines of credit 8 — — 518 526 Commercial real estate 341 — — 623 964 Commercial business 569 — — 15 584 Consumer — — — 73 73 Total loans $ 1,284 $ — $ 75 $ 1,644 $ 3,003

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill	The following table summarizes the Corporation’s acquired goodwill and intangible assets as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) March 31, 2018 December 31, 2017 Gross Carrying Accumulated Gross Carrying Accumulated Goodwill $ 10,288 $ — $ 10,288 $ — Core deposit intangibles 4,426 4,013 4,426 3,945 Total $ 14,714 $ 4,013 $ 14,714 $ 3,945

Stock Compensation Plan (Tables

Stock Compensation Plan (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	A summary of the status of the Corporation’s nonvested restricted stock awards as of March 31, 2018 , and changes during the period then ended is presented below: Shares Weighted-Average Grant-date Fair Value Nonvested at January 1, 2018 33,400 $ 27.70 Granted — — Vested — — Forfeited — — Nonvested as of March 31, 2018 33,400 $ 27.70

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping	For assets measured at fair value on a recurring basis, the fair value measurements by level within the fair value hierarchy are as follows: (Dollar amounts in thousands) (Level 1) (Level 2) (Level 3) Description Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2018: Securities available for sale U.S. Treasury and federal agency $ 4,427 $ 4,427 $ — $ — U.S. government sponsored entities and agencies 13,739 — 13,739 — U.S. agency mortgage-backed securities: residential 23,466 — 23,466 — U.S. agency collateralized mortgage obligations: residential 21,333 — 21,333 — State and political subdivision 24,795 — 24,795 — Corporate debt securities 8,456 — 4,956 3,500 $ 96,216 $ 4,427 $ 88,289 $ 3,500 Equity securities $ 659 $ 633 $ — $ 25 December 31, 2017: Securities available for sale U.S. Treasury and federal agency 4,472 4,472 — — U.S. government sponsored entities and agencies 13,926 — 13,926 — U.S. agency mortgage-backed securities: residential 20,758 — 20,758 — U.S. agency collateralized mortgage obligations: residential 21,924 — 21,924 — State and political subdivisions 29,240 — 29,240 — Corporate debt securities 9,030 — 1,032 7,998 $ 99,350 $ 4,472 $ 86,880 $ 7,998 Equity securities $ 1,817 $ 1,683 $ — $ 134
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents changes in Level 3 assets measured on a recurring basis for the three month periods ended March 31, 2018 and 2017 : (Dollar amounts in thousands) Three months ended March 31, 2018 2017 Balance at the beginning of the period $ 8,132 $ 136 Total gains or losses (realized/unrealized): Included in earnings 1 — Included in other comprehensive income — — Acquired — — Transfers in and/or out of Level 3 (4,608 ) — Balance at the end of the period $ 3,525 $ 136
Schedule of Carrying Amount and Fair Values of Financial Instruments	The following table sets forth the carrying amount and estimated fair values of the Corporation’s financial instruments included in the consolidated balance sheet as of March 31, 2018 and December 31, 2017 : (Dollar amounts in thousands) Carrying Fair Value Measurements using: Description Amount Total Level 1 Level 2 Level 3 March 31, 2018: Financial Assets: Cash and cash equivalents $ 17,177 $ 17,177 $ 17,177 $ — $ — Securities - available for sale 96,216 96,216 4,427 88,290 3,500 Securities - equities 659 659 633 — 25 Loans held for sale 239 239 — 239 — Loans, net 584,242 575,740 — — 575,740 Federal bank stock 4,329 — N/A N/A N/A Accrued interest receivable 2,236 2,236 61 353 1,822 $ 705,098 $ 692,267 $ 22,298 $ 88,882 $ 581,087 Financial Liabilities: Deposits 666,735 669,069 495,530 173,539 — Borrowed funds 20,300 19,984 — 19,984 — Accrued interest payable 367 367 24 343 — $ 687,402 $ 689,420 $ 495,554 $ 193,866 $ — Carrying Fair Value Measurements using: Amount Total Level 1 Level 2 Level 3 December 31, 2017: Financial Assets: Cash and cash equivalents $ 14,374 $ 14,374 $ 14,374 $ — $ — Securities - available for sale 99,350 99,350 4,472 86,880 7,998 Securities - equities 1,817 1,817 1,683 — 134 Loans held for sale 504 504 — 504 — Loans, net 577,234 577,616 — — 577,616 Federal bank stock 4,662 — N/A N/A N/A Accrued interest receivable 2,217 2,217 59 338 1,820 $ 700,158 $ 695,878 $ 20,588 $ 87,722 $ 587,568 Financial Liabilities: Deposits 654,643 657,414 483,956 173,458 — Borrowed funds 26,000 25,499 — 25,499 — Accrued interest payable 413 413 23 390 — $ 681,056 $ 683,326 $ 483,979 $ 199,347 $ —

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2018
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following table sets forth certain information concerning the Bank’s regulatory capital as of the dates presented. The capital adequacy ratios disclosed below are exclusive of the capital conservation buffer. (Dollar amounts in thousands) March 31, 2018 December 31, 2017 Amount Ratio Amount Ratio Total capital to risk-weighted assets: Actual $ 64,463 12.96 % $ 64,221 12.96 % For capital adequacy purposes 39,797 8.00 % 39,630 8.00 % To be well capitalized 49,746 10.00 % 49,537 10.00 % Tier 1 capital to risk-weighted assets: Actual $ 58,528 11.77 % $ 58,088 11.73 % For capital adequacy purposes 29,848 6.00 % 29,722 6.00 % To be well capitalized 39,797 8.00 % 39,630 8.00 % Common Equity Tier 1 capital to risk-weighted assets: Actual $ 58,528 11.77 % $ 58,088 11.73 % For capital adequacy purposes 22,386 4.50 % 22,292 4.50 % To be well capitalized 32,335 6.50 % 32,199 6.50 % Tier 1 capital to average assets: Actual $ 58,528 7.92 % $ 58,088 7.71 % For capital adequacy purposes 29,571 4.00 % 30,117 4.00 % To be well capitalized 36,964 5.00 % 37,647 5.00 %

Accumulated Other Comprehensi28

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	(Dollar amounts in thousands) Unrealized Gains and Losses on Available-for-Sale Securities Defined Benefit Pension Items Totals Accumulated Other Comprehensive Income (Loss) at January 1, 2017 $ (679 ) $ (3,812 ) $ (4,491 ) Other comprehensive income before reclassification 258 — 258 Amounts reclassified from accumulated other comprehensive income (loss) — — — Net current period other comprehensive income 258 — 258 Accumulated Other Comprehensive Income (Loss) at March 31, 2017 $ (421 ) $ (3,812 ) $ (4,233 ) The following tables summarize the changes within each classification of accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2018 and 2017 and summarizes the significant amounts reclassified out of each component of accumulated other comprehensive income: (Dollar amounts in thousands) Unrealized Gains and Losses on Available-for-Sale Securities Defined Benefit Pension Items Totals Accumulated Other Comprehensive Income (Loss) at January 1, 2018, as previously presented $ (679 ) $ (4,839 ) $ (5,518 ) Cumulative effect of change in accounting principle for marketable equity securities, net of tax $ (187 ) $ — $ (187 ) Accumulated Other Comprehensive Income (Loss) at January 1, 2018, as adjusted $ (866 ) $ (4,839 ) $ (5,705 ) Other comprehensive income before reclassification (1,038 ) — (1,038 ) Amounts reclassified from accumulated other comprehensive income (loss) 23 — 23 Net current period other comprehensive income (1,015 ) — (1,015 ) Accumulated Other Comprehensive Income (Loss) at March 31, 2018 $ (1,881 ) $ (4,839 ) $ (6,720 )
Reclassification out of Accumulated Other Comprehensive Income	(Dollar amounts in thousands) Details about Accumulated Other Comprehensive Loss Components Amount Reclassified Affected Line Item in the Statement Where Net Income is Presented Unrealized gains and losses on available-for-sale securities $ (29 ) Net gain on sale of securities 6 Provision for income taxes Total reclassifications for the period $ (23 ) Net of tax

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents the Corporation's sources of noninterest income for the three months ended March 31, 2018 and 2017. For the three months ended March 31, 2018 2,018 2017 Noninterest income In-scope of Topic 606: Service charges on deposits Maintenance fees $ 39 $ 39 Overdraft fees 329 298 Other fees 69 71 Electronic banking fees 315 270 Noninterest income (in-scope of Topic 606) 752 678 Noninterest income (out-of-scope of Topic 606) (1) 147 178 Total noninterest income $ 899 $ 856 (1) Noninterest income items that are out-of-scope include net realized gains (losses) on sales of securities, net gains (losses) on sales of loans, earnings on bank-owned life insurance and certain other noninterest income items.

Earnings per Common Share (Deta

Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings per common share - basic
Net income	$ 1,362	$ 956
Average common shares outstanding (in shares)	2,271,139	2,152,358
Basic earnings per common share (in dollars per share)	$ 0.60	$ 0.44
Earnings per common share - diluted
Net income	$ 1,362	$ 956
Average common shares outstanding (in shares)	2,271,139	2,152,358
Add: Dilutive effects of assumed issuance of restricted stock and exercise of stock options (in shares)	14,176	15,656
Average shares and dilutive potential common shares (in shares)	2,285,315	2,168,014
Diluted earnings per common share (in dollars per share)	$ 0.60	$ 0.44
Stock options not considered in computing earnings per share because they were antidilutive (in shares)	0	0

Securities - Equity Securities

Securities - Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities - equity investments	$ 659	$ 1,817
Equity securities, gross unrealized loss	5
Equity securities, sold, amount	961
Loss on sale of equity investments	$ 23

Securities - Summary of Debt Se

Securities - Summary of Debt Securities - Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 98,598	$ 100,446
Gross Unrealized Gains	62	159
Gross Unrealized Losses	(2,444)	(1,255)
Fair Value	96,216	99,350
U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,538	4,541
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(111)	(69)
Fair Value	4,427	4,472
U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,126	14,136
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(387)	(212)
Fair Value	13,739	13,926
U.S. agency mortgage-backed securities: residential
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,957	20,904
Gross Unrealized Gains	4	7
Gross Unrealized Losses	(495)	(153)
Fair Value	23,466	20,758
U.S. agency collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,204	22,607
Gross Unrealized Gains	33	25
Gross Unrealized Losses	(904)	(708)
Fair Value	21,333	21,924
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	25,265	29,249
Gross Unrealized Gains	10	87
Gross Unrealized Losses	(480)	(96)
Fair Value	24,795	29,240
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,508	9,009
Gross Unrealized Gains	15	38
Gross Unrealized Losses	(67)	(17)
Fair Value	$ 8,456	$ 9,030

Securities - Summary of Schedul

Securities - Summary of Scheduled Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 3,350
Due after one year through five years	26,768
Due after five through ten years	18,825
Due after ten years	3,494
Amortized Cost	98,598	$ 100,446
Fair Value
Due in one year or less	3,336
Due after one year through five years	26,231
Due after five through ten years	18,454
Due after ten years	3,396
Fair Value	96,216	99,350
U.S. agency mortgage-backed securities: residential
Amortized Cost
Amortized Cost	23,957	20,904
Fair Value
Fair Value	23,466	20,758
U.S. agency collateralized mortgage obligations: residential
Amortized Cost
Amortized Cost	22,204	22,607
Fair Value
Fair Value	$ 21,333	$ 21,924

Securities - Schedule of Securi

Securities - Schedule of Securities with Gross Unrealized Loses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value
Less than 12 Months	$ 42,132	$ 27,562
12 Months or More	40,010	43,661
Total	82,142	71,223
Unrealized Loss
Less than 12 Months	(898)	(182)
12 Months or More	(1,546)	(1,073)
Total	(2,444)	(1,255)
U.S. Treasury and federal agency
Fair Value
Less than 12 Months	0	0
12 Months or More	4,427	4,472
Total	4,427	4,472
Unrealized Loss
Less than 12 Months	0	0
12 Months or More	(111)	(69)
Total	(111)	(69)
U.S. government sponsored entities and agencies
Fair Value
Less than 12 Months	4,866	3,447
12 Months or More	8,873	8,975
Total	13,739	12,422
Unrealized Loss
Less than 12 Months	(125)	(42)
12 Months or More	(262)	(170)
Total	(387)	(212)
U.S. agency mortgage-backed securities: residential
Fair Value
Less than 12 Months	13,565	9,659
12 Months or More	6,256	6,581
Total	19,821	16,240
Unrealized Loss
Less than 12 Months	(289)	(48)
12 Months or More	(206)	(105)
Total	(495)	(153)
U.S. agency collateralized mortgage obligations: residential
Fair Value
Less than 12 Months	1,935	954
12 Months or More	17,567	19,147
Total	19,502	20,101
Unrealized Loss
Less than 12 Months	(7)	(16)
12 Months or More	(897)	(692)
Total	(904)	(708)
State and political subdivisions
Fair Value
Less than 12 Months	18,824	10,510
12 Months or More	2,387	3,487
Total	21,211	13,997
Unrealized Loss
Less than 12 Months	(412)	(60)
12 Months or More	(68)	(36)
Total	(480)	(96)
Corporate debt securities
Fair Value
Less than 12 Months	2,942	2,992
12 Months or More	500	999
Total	3,442	3,991
Unrealized Loss
Less than 12 Months	(65)	(16)
12 Months or More	(2)	(1)
Total	$ (67)	$ (17)

Securities - Gains on Sales of

Securities - Gains on Sales of Available for Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 6,531	$ 0
Losses	(29)	0
Tax provision related to losses	$ (6)	$ 0

Securities - Debt Securities, A

Securities - Debt Securities, Additional Information (Details)	Mar. 31, 2018security
Debt securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	123
Securities in unrealized loss positions greater than or equal to one year	51
U.S. agency collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	24
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	7
U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	8
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	1
U.S. agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	6
U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	5

Loans Receivable and Related 37

Loans Receivable and Related Allowance for Loan Losses - Summary of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 590,177	$ 583,361
Less allowance for loan losses	5,935	6,127	$ 5,688	$ 5,545
Total loans, net	584,242	577,234
Residential first mortgages
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	224,690	221,823
Less allowance for loan losses	1,919	2,090	1,956	1,846
Home equity loans and lines of credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	100,241	99,940
Less allowance for loan losses	651	646	648	633
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	196,788	193,068
Less allowance for loan losses	2,751	2,753	2,449	2,314
Commercial business
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	59,200	58,941
Less allowance for loan losses	560	585	583	700
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	9,258	9,589
Less allowance for loan losses	54	53	$ 52	$ 52
Mortgage loans on real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	521,719	514,831
Mortgage loans on real estate | Residential first mortgages
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	224,690	221,823
Mortgage loans on real estate | Home equity loans and lines of credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	100,241	99,940
Mortgage loans on real estate | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	196,788	193,068
Other loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	68,458	68,530
Other loans | Commercial business
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	59,200	58,941
Other loans | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 9,258	$ 9,589

Loans Receivable and Related 38

Loans Receivable and Related Allowance for Loan Losses - Additional Information (Details)	3 Months Ended
	Mar. 31, 2018USD ($)loan	Mar. 31, 2017USD ($)loan	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred costs	$ 1,600,000		$ 1,500,000
Allowance for loan losses	5,935,000	$ 5,688,000	6,127,000	$ 5,545,000
Loans classified as TDRs	427,000		433,000
Allowance loan losses allocated to TDRs	$ 6,000		7,000
Threshold period past due for payment default consideration	30 days
Loans modified as TDRs with payment default after 12 months of modification | loan	0	0
Weighted average period of loss estimate	3 years
United American Savings Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0
Northern Hancock
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0
Residential first mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,919,000	$ 1,956,000	2,090,000	1,846,000
Loans classified as TDRs		323,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,751,000	2,449,000	2,753,000	2,314,000
Home equity loans and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 651,000	648,000	$ 646,000	$ 633,000
Allowance loan losses allocated to TDRs		$ 0
Number of loans modified | loan	0	1

Loans Receivable and Related 39

Loans Receivable and Related Allowance for Loan Losses - Activity in Allowance for Loan Losses by Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Allowance for loan losses:
Beginning Balance	$ 6,127	$ 5,545	$ 5,545
Charge-offs	(585)	(46)
Recoveries	13	27
Provision	380	162
Ending Balance	5,935	5,688	6,127
Ending ALL balance attributable to loans:
Individually evaluated for impairment	6		7
Acquired loans collectively evaluated for impairment	0		0
Originated loans collectively evaluated for impairment	5,929		6,120
Total loans:
Individually evaluated for impairment	1,318		1,916
Acquired loans collectively evaluated for impairment	59,475		62,921
Originated loans collectively evaluated for impairment	529,384		518,524
Total	590,177		583,361
Residential Mortgages
Allowance for loan losses:
Beginning Balance	2,090	1,846	1,846
Charge-offs	(62)	(26)
Recoveries	3	0
Provision	(112)	136
Ending Balance	1,919	1,956	2,090
Ending ALL balance attributable to loans:
Individually evaluated for impairment	6		7
Acquired loans collectively evaluated for impairment	0		0
Originated loans collectively evaluated for impairment	1,913		2,083
Total loans:
Individually evaluated for impairment	419		425
Acquired loans collectively evaluated for impairment	19,418		20,300
Originated loans collectively evaluated for impairment	204,853		201,098
Total	224,690		221,823
Home Equity & Lines of Credit
Allowance for loan losses:
Beginning Balance	646	633	633
Charge-offs	(19)	(1)
Recoveries	1	19
Provision	23	(3)
Ending Balance	651	648	646
Ending ALL balance attributable to loans:
Individually evaluated for impairment	0		0
Acquired loans collectively evaluated for impairment	0		0
Originated loans collectively evaluated for impairment	651		646
Total loans:
Individually evaluated for impairment	8		8
Acquired loans collectively evaluated for impairment	10,429		10,873
Originated loans collectively evaluated for impairment	89,804		89,059
Total	100,241		99,940
Commercial Real Estate
Allowance for loan losses:
Beginning Balance	2,753	2,314	2,314
Charge-offs	(385)	0
Recoveries	2	2
Provision	381	133
Ending Balance	2,751	2,449	2,753
Ending ALL balance attributable to loans:
Individually evaluated for impairment	0		0
Acquired loans collectively evaluated for impairment	0		0
Originated loans collectively evaluated for impairment	2,751		2,753
Total loans:
Individually evaluated for impairment	336		914
Acquired loans collectively evaluated for impairment	25,716		27,404
Originated loans collectively evaluated for impairment	170,736		164,750
Total	196,788		193,068
Commercial Business
Allowance for loan losses:
Beginning Balance	585	700	700
Charge-offs	0	0
Recoveries	1	0
Provision	(26)	(117)
Ending Balance	560	583	585
Ending ALL balance attributable to loans:
Individually evaluated for impairment	0		0
Acquired loans collectively evaluated for impairment	0		0
Originated loans collectively evaluated for impairment	560		585
Total loans:
Individually evaluated for impairment	555		569
Acquired loans collectively evaluated for impairment	2,342		1,451
Originated loans collectively evaluated for impairment	56,303		56,921
Total	59,200		58,941
Consumer
Allowance for loan losses:
Beginning Balance	53	52	52
Charge-offs	(119)	(19)
Recoveries	6	6
Provision	114	13
Ending Balance	54	$ 52	53
Ending ALL balance attributable to loans:
Individually evaluated for impairment	0		0
Acquired loans collectively evaluated for impairment	0		0
Originated loans collectively evaluated for impairment	54		53
Total loans:
Individually evaluated for impairment	0		0
Acquired loans collectively evaluated for impairment	1,570		2,893
Originated loans collectively evaluated for impairment	7,688		6,696
Total	$ 9,258		$ 9,589

Loans Receivable and Related 40

Loans Receivable and Related Allowance for Loan Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Impaired Loans with Specific Allowance
Unpaid Principal Balance	$ 83	$ 77	$ 83
Recorded Investment	83	77	83
Related Allowance	6	10	7
Average Recorded Investment	83	679	319
Interest Income Recognized in Period	1	1	3
Cash Basis Interest Recognized in Period	1	1	3
Impaired Loans with No Specific Allowance
Unpaid Principal Balance	1,347	2,215	2,119
Recorded Investment	1,235	2,004	1,833
Average Recorded Investment	1,534	1,279	1,642
Interest Income Recognized in Period	2	8	14
Cash Basis Interest Recognized in Period	2	8	14
Residential first mortgages
Impaired Loans with Specific Allowance
Unpaid Principal Balance	75	77	75
Recorded Investment	75	77	75
Related Allowance	6	10	7
Average Recorded Investment	75	106	88
Interest Income Recognized in Period	1	1	3
Cash Basis Interest Recognized in Period	1	1	3
Impaired Loans with No Specific Allowance
Unpaid Principal Balance	456	409	461
Recorded Investment	344	372	350
Average Recorded Investment	347	186	289
Interest Income Recognized in Period	1	7	8
Cash Basis Interest Recognized in Period	1	7	8
Home equity loans and lines of credit
Impaired Loans with Specific Allowance
Unpaid Principal Balance	8	0	8
Recorded Investment	8	0	8
Related Allowance	0	0	0
Average Recorded Investment	8	0	2
Interest Income Recognized in Period	0	0	0
Cash Basis Interest Recognized in Period	0	0	0
Impaired Loans with No Specific Allowance
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized in Period	0	0	0
Cash Basis Interest Recognized in Period	0	0	0
Commercial real estate
Impaired Loans with Specific Allowance
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	279	111
Interest Income Recognized in Period	0	0	0
Cash Basis Interest Recognized in Period	0	0	0
Impaired Loans with No Specific Allowance
Unpaid Principal Balance	336	1,165	1,089
Recorded Investment	336	991	914
Average Recorded Investment	625	724	855
Interest Income Recognized in Period	0	1	3
Cash Basis Interest Recognized in Period	0	1	3
Commercial business
Impaired Loans with Specific Allowance
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	294	118
Interest Income Recognized in Period	0	0	0
Cash Basis Interest Recognized in Period	0	0	0
Impaired Loans with No Specific Allowance
Unpaid Principal Balance	555	641	569
Recorded Investment	555	641	569
Average Recorded Investment	562	369	498
Interest Income Recognized in Period	1	0	3
Cash Basis Interest Recognized in Period	1	0	3
Consumer
Impaired Loans with Specific Allowance
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized in Period	0	0	0
Cash Basis Interest Recognized in Period	0	0	0
Impaired Loans with No Specific Allowance
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized in Period	0	0	0
Cash Basis Interest Recognized in Period	$ 0	$ 0	$ 0

Loans Receivable and Related 41

Loans Receivable and Related Allowance for Loan Losses - Loan Portfolio by Internal Risk Rating System (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 590,177	$ 583,361
Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	332,131	329,119
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	242,427	239,420
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,587	3,221
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11,032	11,601
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential first mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	224,690	221,823
Residential first mortgages | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	223,500	220,730
Residential first mortgages | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential first mortgages | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential first mortgages | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,190	1,093
Residential first mortgages | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home equity loans and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	100,241	99,940
Home equity loans and lines of credit | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	99,447	98,946
Home equity loans and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home equity loans and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home equity loans and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	794	994
Home equity loans and lines of credit | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	196,788	193,068
Commercial real estate | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	185,187	182,460
Commercial real estate | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,193	2,744
Commercial real estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	7,408	7,864
Commercial real estate | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	59,200	58,941
Commercial Business | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial Business | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	57,240	56,960
Commercial Business | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	394	477
Commercial Business | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,566	1,504
Commercial Business | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,258	9,589
Consumer | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,184	9,443
Consumer | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	74	146
Consumer | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 0	$ 0

Loans Receivable and Related 42

Loans Receivable and Related Allowance for Loan Losses - Classes of Loan Portfolio by Aging Categories (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Not Past Due	$ 581,511	$ 574,298
Nonaccrual	2,671	3,003
Total loans	590,177	583,361
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	4,590	3,907
Nonaccrual	171	0
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	919	1,463
Nonaccrual	0	75
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	486	690
Nonaccrual	1,246	1,644
Residential first mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Not Past Due	221,330	218,515
Nonaccrual	882	856
Total loans	224,690	221,823
Residential first mortgages | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	1,979	1,936
Nonaccrual	75	0
Residential first mortgages | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	268	357
Nonaccrual	0	75
Residential first mortgages | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	231	159
Nonaccrual	446	415
Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Not Past Due	98,455	98,112
Nonaccrual	681	526
Total loans	100,241	99,940
Home equity loans and lines of credit | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	923	598
Nonaccrual	0	0
Home equity loans and lines of credit | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	182	370
Nonaccrual	0	0
Home equity loans and lines of credit | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	0	334
Nonaccrual	673	518
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Not Past Due	194,368	190,451
Nonaccrual	501	964
Total loans	196,788	193,068
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	1,465	1,026
Nonaccrual	96	0
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	199	430
Nonaccrual	0	0
Commercial real estate | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	255	197
Nonaccrual	75	623
Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Not Past Due	58,399	58,058
Nonaccrual	562	584
Total loans	59,200	58,941
Commercial business | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	41	74
Nonaccrual	0	0
Commercial business | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	198	225
Nonaccrual	0	0
Commercial business | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	0	0
Nonaccrual	7	15
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Not Past Due	8,959	9,162
Nonaccrual	45	73
Total loans	9,258	9,589
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	182	273
Nonaccrual	0	0
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	72	81
Nonaccrual	0	0
Consumer | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Past Due	0	0
Nonaccrual	$ 45	$ 73

Loans Receivable and Related 43

Loans Receivable and Related Allowance for Loan Losses - Nonaccrual Loans by Aging Category (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 2,671	$ 3,003
Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,254	1,284
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	171	0
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	75
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,246	1,644
Residential first mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	882	856
Residential first mortgages | Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	361	366
Residential first mortgages | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	75	0
Residential first mortgages | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	75
Residential first mortgages | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	446	415
Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	681	526
Home equity loans and lines of credit | Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	8	8
Home equity loans and lines of credit | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Home equity loans and lines of credit | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Home equity loans and lines of credit | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	673	518
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	501	964
Commercial real estate | Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	330	341
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	96	0
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Commercial real estate | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	75	623
Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	562	584
Commercial business | Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	555	569
Commercial business | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Commercial business | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Commercial business | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	7	15
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	45	73
Consumer | Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	0	0
Consumer | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 45	$ 73

Goodwill and Intangible Asset44

Goodwill and Intangible Assets - Acquired Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Gross Carrying Amount
Goodwill	$ 10,288	$ 10,288
Core deposit intangibles	4,426	4,426
Total	14,714	14,714
Accumulated Amortization
Goodwill	0	0
Core deposit intangibles	4,013	3,945
Total	$ 4,013	$ 3,945

Goodwill and Intangible Asset45

Goodwill and Intangible Assets - Additional Information (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)acquisition	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of acquisitions resulting in goodwill | acquisition	4
Goodwill impairment loss | $	$ 0		$ 0
Number of acquisitions resulting in intangible assets | acquisition	3
Intangible asset amortization | $	$ 69,000	$ 60,000

Stock Compensation Plan - Addit

Stock Compensation Plan - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Apr. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable (in shares)	0
Allocated share-based compensation expense	$ 75	$ 55
Unrecognized compensation expense related to nonvested share-based plans	$ 590
Period of recognition for unrecognized compensation expense	3 years
2014 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)			176,866
2014 Stock Incentive Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grants (in shares)	52,533
2014 Stock Incentive Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grants (in shares)	88,433
2007 Stock Incentive Plan and Trust | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	10 years

Stock Compensation Plan - Summa

Stock Compensation Plan - Summary of Nonvested Restricted Stock Awards (Details) - Restricted Stock	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Shares
Nonvested balance at beginning of period (in shares) | shares	33,400
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Nonvested balance at end of period (in shares) | shares	33,400
Weighted-Average Grant-date Fair Value
Nonvested balance at beginning of period (in dollars per share) | $ / shares	$ 27.70
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	0
Nonvested balance at end of period (in dollars per share) | $ / shares	$ 27.70

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Provision for loan losses	$ 380,000	$ 162,000
Write-downs	$ 0	0
Discount rate	10.00%
Loans classified as TDRs	$ 427,000		$ 433,000
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired financing receivable	0		0
Real Estate Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans classified as TDRs	69,000		68,000
Home Equity Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans classified as TDRs	7,000		8,000
Market and Income Approach Valuation Technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired financing receivable, recorded investment	0		$ 0
Market and Income Approach Valuation Technique | Impaired Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Provision for loan losses	$ 0	$ 0

Fair Value - Assets Measured at

Fair Value - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	$ 96,216	$ 99,350
Equity securities	659	1,817
U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	4,427	4,472
U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	13,739	13,926
U.S. agency mortgage-backed securities: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	23,466	20,758
U.S. agency collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	21,333	21,924
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	24,795	29,240
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	8,456	9,030
Level 1
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	4,427	4,472
Equity securities	633	1,683
Level 1 | U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	4,427	4,472
Level 1 | U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 1 | U.S. agency mortgage-backed securities: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 1 | U.S. agency collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 1 | State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 1 | Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 2
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	88,289	86,880
Equity securities	0	0
Level 2 | U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 2 | U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	13,739	13,926
Level 2 | U.S. agency mortgage-backed securities: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	23,466	20,758
Level 2 | U.S. agency collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	21,333	21,924
Level 2 | State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	24,795	29,240
Level 2 | Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	4,956	1,032
Level 3
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	3,500	7,998
Equity securities	25	134
Level 3 | U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 3 | U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 3 | U.S. agency mortgage-backed securities: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 3 | U.S. agency collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 3 | State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	0	0
Level 3 | Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities - available for sale	$ 3,500	$ 7,998

Fair Value - Changes in Level 3

Fair Value - Changes in Level 3 Assets Measured on a Recurring Basis (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at the beginning of the period	$ 8,132	$ 136
Total gains or losses (realized/unrealized):
Included in earnings	1	0
Included in other comprehensive income	0	0
Acquired	0	0
Transfers in and/or out of Level 3	(4,608)	0
Balance at the end of the period	$ 3,525	$ 136

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Fair Value of Financial Instruments Included in the Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial Assets:
Securities - available for sale	$ 96,216	$ 99,350
Securities - equity investments	659	1,817
Level 1
Financial Assets:
Securities - available for sale	4,427	4,472
Securities - equity investments	633	1,683
Level 2
Financial Assets:
Securities - available for sale	88,289	86,880
Securities - equity investments	0	0
Level 3
Financial Assets:
Securities - available for sale	3,500	7,998
Securities - equity investments	25	134
Carrying Amount
Financial Assets:
Cash and cash equivalents	17,177	14,374
Securities - available for sale	96,216	99,350
Securities - equity investments	659	1,817
Loans held for sale	239	504
Loans, net	584,242	577,234
Federal bank stock	4,329	4,662
Accrued interest receivable	2,236	2,217
Financial assets	705,098	700,158
Financial Liabilities:
Deposits	666,735	654,643
FHLB advances	20,300	26,000
Accrued interest payable	367	413
Financial liabilities	687,402	681,056
Estimate of Fair Value Measurement
Financial Assets:
Cash and cash equivalents	17,177	14,374
Securities - available for sale	96,216	99,350
Securities - equity investments	659	1,817
Loans held for sale	239	504
Loans, net	575,740	577,616
Federal bank stock	0	0
Accrued interest receivable	2,236	2,217
Financial assets	692,267	695,878
Financial Liabilities:
Deposits	669,069	657,414
FHLB advances	19,984	25,499
Accrued interest payable	367	413
Financial liabilities	689,420	683,326
Estimate of Fair Value Measurement | Level 1
Financial Assets:
Cash and cash equivalents	17,177	14,374
Securities - available for sale	4,427	4,472
Securities - equity investments	633	1,683
Loans held for sale	0	0
Loans, net	0	0
Accrued interest receivable	61	59
Financial assets	22,298	20,588
Financial Liabilities:
Deposits	495,530	483,956
FHLB advances	0	0
Accrued interest payable	24	23
Financial liabilities	495,554	483,979
Estimate of Fair Value Measurement | Level 2
Financial Assets:
Cash and cash equivalents	0	0
Securities - available for sale	88,290	86,880
Securities - equity investments	0	0
Loans held for sale	239	504
Loans, net	0	0
Accrued interest receivable	353	338
Financial assets	88,882	87,722
Financial Liabilities:
Deposits	173,539	173,458
FHLB advances	19,984	25,499
Accrued interest payable	343	390
Financial liabilities	193,866	199,347
Estimate of Fair Value Measurement | Level 3
Financial Assets:
Cash and cash equivalents	0	0
Securities - available for sale	3,500	7,998
Securities - equity investments	25	134
Loans held for sale	0	0
Loans, net	575,740	577,616
Accrued interest receivable	1,822	1,820
Financial assets	581,087	587,568
Financial Liabilities:
Deposits	0	0
FHLB advances	0	0
Accrued interest payable	0	0
Financial liabilities	$ 0	$ 0

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Regulatory Capital (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Total capital to risk-weighted assets: Amount
Actual	$ 64,463	$ 64,221
For capital adequacy purposes	39,797	39,630
To be well capitalized	49,746	49,537
Tier 1 capital to risk-weighted assets: Amount
Actual	58,528	58,088
For capital adequacy purposes	29,848	29,722
To be well capitalized	39,797	39,630
Common Equity Tier 1 capital to risk-weighted assets: Amount
Actual	58,528	58,088
For capital adequacy purposes	22,386	22,292
To be well capitalized	32,335	32,199
Tier 1 capital to average assets: Amount
Actual	58,528	58,088
For capital adequacy purposes	29,571	30,117
To be well capitalized	$ 36,964	$ 37,647
Total capital to risk-weighted assets: Ratio
Actual	12.96%	12.96%
For capital adequacy purposes	8.00%	8.00%
To be well capitalized	10.00%	10.00%
Tier 1 capital to risk-weighted assets: Ratios
Actual	11.77%	11.73%
For capital adequacy purposes	6.00%	6.00%
To be well capitalized	8.00%	8.00%
Common Equity Tier 1 capital to risk-weighted assets: Ratio
Actual	11.77%	11.73%
For capital adequacy purposes	4.50%	4.50%
To be well capitalized	6.50%	6.50%
Tier 1 capital to average assets: Ratio
Actual	7.92%	7.71%
For capital adequacy purposes	4.00%	4.00%
To be well capitalized	5.00%	5.00%

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 59,091,000	$ 54,073,000
Other comprehensive income before reclassification	(1,038,000)	258,000
Amounts reclassified from accumulated other comprehensive income (loss)	(1,362,000)	(956,000)
Net of tax	(1,015,000)	258,000
Balance at end of period	58,877,000	54,761,000
Amount Reclassified From Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	23,000	0
Unrealized Gains and Losses on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(866,000)	(679,000)
Cumulative effect of change in accounting principle for marketable equity securities, net of tax			$ (187,000)
Other comprehensive income before reclassification	(1,038,000)	258,000
Net of tax	(1,015,000)	258,000
Balance at end of period	(1,881,000)	(421,000)
Unrealized Gains and Losses on Available-for-Sale Securities | Amount Reclassified From Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	23,000	0
Defined Benefit Pension Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(4,839,000)	(3,812,000)
Cumulative effect of change in accounting principle for marketable equity securities, net of tax			0
Other comprehensive income before reclassification	0	0
Net of tax	0	0
Balance at end of period	(4,839,000)	(3,812,000)
Defined Benefit Pension Items | Amount Reclassified From Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Totals
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(5,705,000)	(4,491,000)
Cumulative effect of change in accounting principle for marketable equity securities, net of tax			$ (187,000)
Balance at end of period	(6,720,000)	$ (4,233,000)
Previously Reported
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	59,091,000
Previously Reported | Unrealized Gains and Losses on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(679,000)
Previously Reported | Defined Benefit Pension Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(4,839,000)
Previously Reported | Totals
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ (5,518,000)

Accumulated Other Comprehensi54

Accumulated Other Comprehensive Income (Loss) - Significant Amounts Reclassified Out of Each Component of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net gain on sale of securities	$ (29,000)	$ 0
Provision for income taxes	(266,000)	(273,000)
Net income	1,362,000	956,000
Amount Reclassified From Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net income	(23,000)	0
Amount Reclassified From Accumulated Other Comprehensive Income | Unrealized gains and losses on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net gain on sale of securities	(29,000)
Provision for income taxes	6,000
Net income	$ (23,000)	$ 0

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	$ 752	$ 678
Noninterest income (out-of-scope of Topic 606)	147	178
Total noninterest income	899	856
Maintenance fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	39	39
Overdraft fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	329	298
Other fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	69	71
Electronic banking fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	$ 315	$ 270