Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current [Abstract]
Federal	$ 1,254	$ 1,145	$ 666
State	561	44	2
Current income tax expense	1,815	1,189	668
Deferred [Abstract]
Federal	674	1,243	472
State	301	422	583
Deferred income tax expense	975	1,665	1,055
Total income tax expense	2,790	2,854	1,723
Deferred tax assets [Abstract]
Allowance for loan losses	3,858	4,176
Deferred compensation	243	316
Retirement compensation	1,525	1,423
Stock option compensation	264	252
Post retirement benefits	425	290
Current state franchise taxes	186	15
Non-accrual interest	230	141
Net operating loss	0	63
Tax credit carryovers	937	1,720
Investment securities unrealized loss	0	426
Other	32	19
Deferred tax assets	7,700	8,841
Deferred tax liabilities [Abstract]
Fixed assets depreciation	1,364	1,291
FHLB dividends	260	260
Tax credit - loss on pass-through	155	223
Deferred loan costs	1,038	918
Investment securities unrealized gains	469	0
Total deferred tax liabilities	3,286	2,692
Net deferred tax assets (see Note 7)	4,414	6,149
Operating Loss Carryforwards [Line Items]
State net operating loss carryforwards	0
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	937
Reconciliation of income taxes computed at federal statutory rate and provision for income taxes [Abstract]
Federal statutory income tax rate (in hundredths)	34.00%
Income tax expense at statutory rates	2,944	2,801	2,166
Reduction for tax exempt interest	(165)	(191)	(166)
State franchise tax, net of federal benefit	569	457	408
Cash surrender value of life insurance	(154)	(154)	(155)
Solar credit amortization	(179)	(201)	(359)
Other	(225)	142	(171)
Total income tax expense	$ 2,790	$ 2,854	$ 1,723
Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, expiration dates	Dec. 31, 2028
Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, expiration dates	Dec. 31, 2034