Accumulated Other Comprehensive Loss - Schedule of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Increase (Decrease} In Accumulated Other Comprehensive Income (Loss), Net Of Tax1 [Roll Forward]
Other comprehensive income before reclassifications	$ 488	$ 1,353
Amounts reclassified from accumulated other comprehensive (loss) income	(104)	(262)
Total other comprehensive income	384	1,091
Net Unrealized Gain on Available for Sale Securities
Increase (Decrease} In Accumulated Other Comprehensive Income (Loss), Net Of Tax1 [Roll Forward]
Beginning balance	(639)	258
Other comprehensive income before reclassifications	488	1,353
Amounts reclassified from accumulated other comprehensive (loss) income	(130)	(287)
Total other comprehensive income	358	1,066
Ending balance	(281)	1,324
Defined Benefit Plan
Increase (Decrease} In Accumulated Other Comprehensive Income (Loss), Net Of Tax1 [Roll Forward]
Beginning balance	(4,289)	(4,057)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	26	25
Total other comprehensive income	26	25
Ending balance	(4,263)	(4,032)
AOCI Attributable to Parent
Increase (Decrease} In Accumulated Other Comprehensive Income (Loss), Net Of Tax1 [Roll Forward]
Beginning balance	(4,928)	(3,799)
Total other comprehensive income	384	1,091
Ending balance	$ (4,544)	$ (2,708)