Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Assets [Abstract]
Foreign currency forward exchange contracts		$ 123
Liabilities [Abstract]
Foreign currency forward exchange contracts		469
Net gain (loss) on foreign currency forward exchange contracts	1,059	(1,302)
Notional amounts of foreign currency forward exchange contracts	39,814	40,027
Fair Value [Member]
Assets [Abstract]
Foreign currency forward exchange contracts	53
Total Assets	53
Liabilities [Abstract]
Foreign currency forward exchange contracts	169
Total Liabilities	169
Level 1 [Member]
Assets [Abstract]
Foreign currency forward exchange contracts	0
Total Assets	0
Liabilities [Abstract]
Foreign currency forward exchange contracts	0
Total Liabilities	0
Level 2 [Member]
Assets [Abstract]
Foreign currency forward exchange contracts	53
Total Assets	53
Liabilities [Abstract]
Foreign currency forward exchange contracts	169
Total Liabilities	169
Level 3 [Member]
Assets [Abstract]
Foreign currency forward exchange contracts	0
Total Assets	0
Liabilities [Abstract]
Foreign currency forward exchange contracts	0
Total Liabilities	$ 0