Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	$ 7,569	$ 7,856
Restructuring Charges	16,687	5,912	4,866
Payments for Restructuring	(12,591)	(6,297)
Restructuring Reserve, Translation Adjustment	280	98
Restructuring Reserve, Ending	11,945	7,569	7,856
Employee Severance
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	7,469	7,721
Restructuring Charges	14,652	5,190
Payments for Restructuring	(10,746)	(5,540)
Restructuring Reserve, Translation Adjustment	280	98
Restructuring Reserve, Ending	11,655	7,469
Other Restructuring Charges
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	100	135
Restructuring Charges	2,035	722
Payments for Restructuring	(1,845)	(757)
Restructuring Reserve, Translation Adjustment	0	0
Restructuring Reserve, Ending	$ 290	$ 100