Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Net Income	$ 5,855		$ 5,320
Other comprehensive income, before reclassifications, net of tax	745	[1]	241	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	165	[1]	57	[1]
Other Comprehensive Income (Loss)	910		298
Comprehensive Income	6,765		5,618
Unrealized Gains and Losses on Available for Sale Securities [Member]
Other comprehensive income, before reclassifications, net of tax	745		241
Reclassification from Accumulated Other Comprehensive Income, net of tax	55		0
Amortization of Net Retirement Plan Actuarial Loss [Member]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	117		70
Accretion of Net Retirement Plan Prior Service Credit [Member]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	$ (7)		$ (13)

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