Accumulated Other Comprehensive Income (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pension settlement charge		$ (8,190)
Pension/postretirement settlements and curtailments, before tax	$ 103	8,377	$ 46
Pension/postretirement settlements and curtailments	103	5,167
Other Postretirement Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Plan remeasurement, effect on liabilities	$ 2,855	$ (5,926)
Pension settlement charge
Pension/postretirement settlements and curtailments, before tax
Pension/Postretirement plan change in benefits			$ 4,864
Other comprehensive income resulting from plan modification and remeasurement			$ 4,900