Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, beginning of period	$ (4,781)	$ (4,509)
Other comprehensive income (loss)- before reclassifications	4,821	1,987
Amount reclassified from accumulated other comprehensive income	33	(165)
Other comprehensive income (loss), net of tax	4,854	1,822
Accumulated other comprehensive income (loss), net of tax, end of period	73	(2,687)
Net Unrealized Holding Gain (Loss) on Securities Available for Sale, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, beginning of period	(4,492)	(3,693)
Other comprehensive income (loss)- before reclassifications	4,821	1,987
Amount reclassified from accumulated other comprehensive income	0	(149)
Other comprehensive income (loss), net of tax	4,821	1,838
Accumulated other comprehensive income (loss), net of tax, end of period	329	(1,855)
Net Change in Net Actuarial Loss and Prior Service Credit on Pension and Postretirement Benefit Plans, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax, beginning of period	(289)	(816)
Other comprehensive income (loss)- before reclassifications	0	0
Amount reclassified from accumulated other comprehensive income	33	(16)
Other comprehensive income (loss), net of tax	33	(16)
Accumulated other comprehensive income (loss), net of tax, end of period	$ (256)	$ (832)