Restructuring Charges (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 800	$ 6,700	$ 3,500
Other Restructuring Costs	$ 200
Business Restructuring Reserves [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		4,200
Special Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Buy-out agreement		1,905
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 600