Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	$ 140,108	$ 125,695
Before reclassifications	3,918	1,909
Reclassifications	(632)	(219)
Balance ending	146,906	140,851
Total [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	236	785
Balance ending	3,522	2,475
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	469	1,126
Before reclassifications	3,835	1,823
Reclassifications	(632)	(219)
Balance ending	3,672	2,730
Changes in Pension Plan Assets and Benefit Obligations [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	(233)	(341)
Before reclassifications	83	86
Reclassifications	0	0
Balance ending	$ (150)	$ (255)