Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	$ 11,945	$ 7,569
Restructuring Charges	19,830	16,687	5,912
Payments for Restructuring	(18,949)	(12,591)
Restructuring Reserve, Translation Adjustment	359	280
Restructuring Reserve, Ending	13,185	11,945	7,569
Employee Severance
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	11,655	7,469
Restructuring Charges	15,196	14,652
Payments for Restructuring	(14,156)	(10,746)
Restructuring Reserve, Translation Adjustment	359	280
Restructuring Reserve, Ending	13,054	11,655
Other Restructuring Charges
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	290	100
Restructuring Charges	4,634	2,035
Payments for Restructuring	(4,793)	(1,845)
Restructuring Reserve, Translation Adjustment	0	0
Restructuring Reserve, Ending	$ 131	$ 290