Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	$ 140,108	$ 125,695
Before reclassifications	4,582	(91)
Reclassifications	(429)	(219)
Balance ending	145,710	137,698
Total [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	236	785
Balance ending	4,389	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	4,526	(149)
Reclassifications	(429)	(219)
Balance ending	4,566	758
Changes in Pension Plan Assets and Benefit Obligations [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning	(233)	(341)
Before reclassifications	56	58
Reclassifications	0	0
Balance ending	$ (177)	$ (283)