Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Net Income		$ 6,549	$ 5,855
Other comprehensive income, before reclassifications, net of tax	[1]	2,437	745
Reclassification from Accumulated Other Comprehensive Income, net of tax	[1]	99	165
Other Comprehensive Income (Loss)		2,536	910
Comprehensive Income		9,085	6,765
Unrealized Gains and Losses on Available for Sale Securities [Member]
Other comprehensive income, before reclassifications, net of tax		2,437	745
Reclassification from Accumulated Other Comprehensive Income, net of tax		0	55
Amortization of Net Retirement Plan Actuarial Loss [Member]
Other comprehensive income, before reclassifications, net of tax	[1]	0	0
Reclassification from Accumulated Other Comprehensive Income, net of tax		101	117
Accretion of Net Retirement Plan Prior Service Credit [Member]
Other comprehensive income, before reclassifications, net of tax	[1]	0	0
Reclassification from Accumulated Other Comprehensive Income, net of tax		$ (2)	$ (7)

[1] All amounts are net of tax. Amounts in parentheses indicate debits.