Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	$ 846	$ 322	$ 1,673	$ 0
Gain (loss) on currency translation [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	347	(356)	1,462	(631)
Hedge ineffectiveness
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	566	0	167	70
Other non-operating income (expense) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	$ (67)	$ 678	$ 44	$ 561