Retirement Plan (Net Periodic Pension Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ 0	$ 0	$ 37,589
Defined Benefit Plan, Service Cost	1,694	895	1,112
Interest cost on projected benefit obligations	819	638	665
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(3,482)	(4,296)	(5,896)
Defined Benefit Plan, Amortization of Gains (Losses)	183	0	130
Loss on settlement	0	0	1,726
Defined Benefit Plan, Net Periodic Benefit Cost	(786)	(2,763)	(2,263)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest		0
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments		$ 39,500
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ 0		$ 37,589