Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets:
Foreign exchange forward contracts	$ 214	$ 935
Liabilities:
Interest rate swap	3,065	2,616
Fair Value, Inputs, Level 1 [Member]
Assets:
Foreign exchange forward contracts	0	0
Liabilities:
Interest rate swap	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Foreign exchange forward contracts	214	935
Liabilities:
Interest rate swap	3,065	2,616
Fair Value, Inputs, Level 3 [Member]
Assets:
Foreign exchange forward contracts	0	0
Liabilities:
Interest rate swap	$ 0	$ 0