Accumulated Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (236)	$ 767
Other comprehensive income before reclassifications (net of tax)		1,117	887
Amounts reclassified from accumulated other comprehensive income (net of tax)		22	(51)
Net current period other comprehensive income		1,139	836
Ending Balance		903	1,603
Unrealized Gains (Loss) On Available For Sale Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	2,204	3,093
Other comprehensive income before reclassifications (net of tax)	[1]	1,117	887
Amounts reclassified from accumulated other comprehensive income (net of tax)	[1]	(18)	(83)
Net current period other comprehensive income	[1]	1,099	804
Ending Balance	[1]	3,303	3,897
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(2,440)	(2,326)
Other comprehensive income before reclassifications (net of tax)	[1]	0	0
Amounts reclassified from accumulated other comprehensive income (net of tax)	[1]	40	32
Net current period other comprehensive income	[1]	40	32
Ending Balance	[1]	$ (2,400)	$ (2,294)

[1] Amounts in parentheses indicate debits.