Restructuring Activity (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	$ (2,960)	$ 10,239
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	937	2,702
Contract Termination
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	186	1,448
Gain on disposal of fixed assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	(5,533)	0
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	1,450	4,487
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	0	366
Inventory Valuation and Obsolescence [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring (benefit) charges	$ 0	$ 1,236