Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pension [Abstract]
Service cost - benefits earned during the period	$ 135	$ 127	$ 406	$ 379
Interest cost on projected benefit obligation	986	1,139	2,958	3,571
Expected Return on Plan Assets	(1,437)	(1,523)	(4,313)	(4,569)
Amortization of Prior Service Cost	(68)	(203)	(203)	(203)
Amortization of unrecognized net loss	647	660	1,940	1,969
Net periodic pension cost	$ 263	$ 200	$ 788	$ 1,147