Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Net Income		$ 6,738		$ 5,933		$ 19,934		$ 18,093
Other comprehensive income, before reclassifications, net of tax	[1]	(810)		543		2,309		384
Reclassification from Accumulated Other Comprehensive Income, net of tax	[1]	110		108		221		262
Other Comprehensive Income (Loss)		(700)		651		2,530		646
Comprehensive Income		6,038		6,584		22,464		18,739
Unrealized Gains and Losses on Available for Sale Securities [Member]
Other comprehensive income, before reclassifications, net of tax		(810)	[1]	543	[1]	2,309	[2]	384	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax		0	[1]	0	[1]	(88)	[2]	(65)	[1]
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		111	[1]	117	[1]	314	[2]	352	[1]
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)	[1]	$ (9)	[1]	$ (5)	[2]	$ (25)	[1]

[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.