Accumulated Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance				$ 119,760
Other comprehensive income (loss) before reclassifications (net of tax)		$ 1,184	$ (1,351)	2,301	$ (464)
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)		(45)	(81)	(23)	(132)
Other comprehensive income (loss), net of tax		1,139	(1,432)	2,278	(596)
Ending Balance		124,456		124,456
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		903	1,603	(236)	767
Ending Balance		2,042	171	2,042	171
Unrealized Gains (Loss) on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	3,303	3,897	2,204	3,093
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	1,184	(1,351)	2,301	(464)
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	(84)	(116)	(102)	(199)
Other comprehensive income (loss), net of tax	[1]	1,100	(1,467)	2,199	(663)
Ending Balance	[1]	4,403	2,430	4,403	2,430
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(2,400)	(2,294)	(2,440)	(2,326)
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	39	35	79	67
Other comprehensive income (loss), net of tax	[1]	39	35	79	67
Ending Balance	[1]	$ (2,361)	$ (2,259)	$ (2,361)	$ (2,259)

[1] Amounts in parentheses indicate debits to the Consolidated Balance Sheet