Special Charges (Special and Restructuring Charges, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Special charges, net	$ 8,196	$ 9,720	$ 7,491
Total restructuring charges, net	8,975	4,634	5,246
Restructuring and Related Cost, Incurred Cost	17,171	14,354	12,737
Total special and restructuring charges, net	8,196	9,720
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Recoveries of Restructuring Charges	$ (4,493)	$ 119	$ (699)