Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		$ 56,684	$ 55,852	$ 49,535
Total other comprehensive (loss) income		(2,723)	(614)	3,264
Ending balance		57,670	56,684	55,852
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	[1]	(147)	359
Other comprehensive (loss) income before reclassification	[1]	(2,454)	(457)
Amount reclassified from accumulated other comprehensive loss	[1]	(308)	(49)
Total other comprehensive (loss) income	[1]	(2,762)	(506)
Ending balance	[1]	(2,909)	(147)	359
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	[1]	(91)	17
Other comprehensive (loss) income before reclassification	[1]	39	(108)
Total other comprehensive (loss) income	[1]	39	(108)
Ending balance	[1]	$ (52)	$ (91)	$ 17

[1] All amounts are net of tax. Amounts in parentheses indicate debits.