Pension and Postretirement Plans (Future Amortization of Net Periodic Cost) (Details 8) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss recognition	$ 0
Prior service cost recognition	291
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss recognition	2,329
Prior service cost recognition	457
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss recognition	(1,502)
Prior service cost recognition	$ (335)