Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Assets:
Foreign currency forward exchange contracts			$ 130
Liabilities:
Foreign currency forward exchange contracts			0
Notional amount of foreign currency derivatives	$ 38,463		$ 34,631
Net gain on foreign currency forward exchange contracts	1,753	$ (902)
Fair Value
Assets:
Foreign currency forward exchange contracts	80
Total Assets	80
Liabilities:
Foreign currency forward exchange contracts	46
Total Liabilities	46
Level 1
Assets:
Foreign currency forward exchange contracts	0
Total Assets	0
Liabilities:
Foreign currency forward exchange contracts	0
Total Liabilities	0
Level 2
Assets:
Foreign currency forward exchange contracts	80
Total Assets	80
Liabilities:
Foreign currency forward exchange contracts	46
Total Liabilities	46
Level 3
Assets:
Foreign currency forward exchange contracts	0
Total Assets	0
Liabilities:
Foreign currency forward exchange contracts	0
Total Liabilities	$ 0