Accumulated Other Comprehensive Income ("AOCI") (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 197,835	$ 173,780	$ 167,551
Net unrealized gains (losses) on securities available for sale, net of tax	(3,729)	(1,159)	2,595
Reclassification adjustment for realized gains on securities, net of tax	(543)	(564)	(328)
Change in unfunded pension liability, net of tax	108	349	(1,123)
Ending Balance	201,380	197,835	173,780
Change in unrealized gains (losses) on securities available for sale, tax	(2,007)	(626)	1,398
Reclassification adjustment for gains on securities, tax	(293)	(303)	(177)
Change in unfunded pension liability, tax	58	189	(605)
Net Unrealized Gains (Losses) on Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	4,122	5,845	3,578
Net unrealized gains (losses) on securities available for sale, net of tax	(3,729)	(1,159)	2,595
Reclassification adjustment for realized gains on securities, net of tax	(543)	(564)	(328)
Ending Balance	(150)	4,122	5,845
Adjustments Related to Pension Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(1,832)	(2,181)	(1,058)
Change in unfunded pension liability, net of tax	108	349	(1,123)
Ending Balance	(1,724)	(1,832)	(2,181)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	2,290	3,664	2,520
Ending Balance	$ (1,874)	$ 2,290	$ 3,664