Restructuring Activity Restructuring expenses (income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	$ 912	$ 1,204	$ 14,674	$ 17,653
Employee Termination and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	267	(987)	945	13,265
Lease Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	0	364	6,706	364
Moving Costs Associated with Plant Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	52	1,733	4,447	2,334
Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	593	94	1,323	1,690
Gain or Loss on disposal of fixed assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	$ 0	$ 0	1,253	$ 0
Inventory Valuation Reserve [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)			$ 452