Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 6,700	$ 3,500
Buy-out agreement	1,900
Restructuring Reserve	6,539	1,368
Restructuring Reserve, Current		1,369	$ 0
Restructuring Costs	6,676	3,541
Payments for Restructuring	(1,506)	(2,172)
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	2,500
Restructuring Reserve	2,505	1,358	0
Restructuring Costs	2,582	3,530
Payments for Restructuring	(1,435)	(2,172)
government incentive repayment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,884	0	0
Restructuring Costs	1,884	0
Payments for Restructuring	0	0
Special Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,845	0	0
Restructuring Costs	1,905	0
Payments for Restructuring	(60)	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	305	11	$ 0
Restructuring Costs	305	11
Payments for Restructuring	(11)	$ 0
Business Restructuring Reserves [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 4,200