Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (2,132)	$ (7,434)
Net change in other comprehensive income (loss)	$ 1,453	$ (311)	1,449	5,430
Ending Balance	(683)	(2,004)	(683)	(2,004)
Unrealized Gain on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3,389	(2,023)
Net change in other comprehensive income (loss)			544	3,462
Ending Balance	3,933	1,439	3,933	1,439
Unrealized Loss on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(3,298)	(5,698)
Net change in other comprehensive income (loss)			704	2,194
Ending Balance	(2,594)	(3,504)	(2,594)	(3,504)
Deferred Gain on Hedge Transactions
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			571	715
Net change in other comprehensive income (loss)			(108)	(109)
Ending Balance	463	606	463	606
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,794)	(428)
Net change in other comprehensive income (loss)			309	(117)
Ending Balance	$ (2,485)	$ (545)	$ (2,485)	$ (545)