Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Net Income		$ 6,647	$ 6,305	$ 13,196		$ 12,160
Other comprehensive income, before reclassifications, net of tax	[1]	682	(1,014)	3,119		(159)
Reclassification from Accumulated Other Comprehensive Income, net of tax	[1]	12	99	111		154
Other Comprehensive Income (Loss)		694	(915)	3,230		(5)
Comprehensive Income		7,341	5,390	16,426		12,155
Unrealized Gains and Losses on Available for Sale Securities [Member]
Other comprehensive income, before reclassifications, net of tax	[1]	682	(1,014)	3,119	[2]	(159)
Reclassification from Accumulated Other Comprehensive Income, net of tax	[1]	(88)	(10)	(88)	[2]	(65)
Amortization of Net Retirement Plan Actuarial Loss [Member]
Other comprehensive income, before reclassifications, net of tax	[1]	0	0	0		0
Reclassification from Accumulated Other Comprehensive Income, net of tax	[1]	102	118	203	[2]	235
Accretion of Net Retirement Plan Prior Service Credit [Member]
Other comprehensive income, before reclassifications, net of tax	[1]	0	0	0		0
Reclassification from Accumulated Other Comprehensive Income, net of tax	[1]	$ (2)	$ (9)	$ (4)	[2]	$ (16)

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

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension cost.