Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	$ 7,856	$ 14,806
Restructuring Charges	5,912	4,866	31,368
Payments for Restructuring	(6,297)	(11,067)	(22,200)
Restructuring Reserve, Translation Adjustment	98	(749)
Restructuring Reserve, Ending	7,569	7,856	14,806
Employee Severance
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	7,721	14,122
Restructuring Charges	5,190	3,508
Payments for Restructuring	(5,540)	(9,252)
Restructuring Reserve, Translation Adjustment	98	(657)
Restructuring Reserve, Ending	7,469	7,721
Other Restructuring Charges
Restructuring Cost and Reserve
Restructuring Reserve, Beginning	135	684
Restructuring Charges	722	1,358
Payments for Restructuring	(757)	(1,815)
Restructuring Reserve, Translation Adjustment	0	(92)
Restructuring Reserve, Ending	$ 100	$ 135