Restructuring Activity Restructuring expenses (income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	$ 128	$ 11,718
Employee Termination and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	28	553
Lease Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	0	6,145
Moving Costs Associated with Plant Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	70	3,135
Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	30	678
Gain or Loss on disposal of fixed assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Expense (Income)	$ 0	$ 1,207