Other Expense/(Income), net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Expense/(Income), net [Abstract]
Currency transactions	$ 5,708	$ (84)	$ (4,626)
Bank fees and amortization of debt issuance costs	2,385	1,837	1,704
Letter of credit fees	963	1,479	1,831
Other	(1,427)	(593)	115
Total	$ 7,629	$ 2,639	$ (976)