Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (2,452)	$ (2,132)
Net change in other comprehensive income (loss)	$ 1,771	$ (1,723)	6,035	(4)
Ending Balance	3,583	(2,136)	3,583	(2,136)
Unrealized Gain on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			1,306	3,389
Net change in other comprehensive income (loss)			5,935	(667)
Ending Balance	7,241	2,722	7,241	2,722
Unrealized Loss on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(1,955)	(3,298)
Net change in other comprehensive income (loss)			53	536
Ending Balance	(1,902)	(2,762)	(1,902)	(2,762)
Deferred Gain on Hedge Transactions
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			427	571
Net change in other comprehensive income (loss)			(74)	(72)
Ending Balance	353	499	353	499
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,230)	(2,794)
Net change in other comprehensive income (loss)			121	199
Ending Balance	$ (2,109)	$ (2,595)	$ (2,109)	$ (2,595)