Other Income (Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	$ 1,340	$ (706)	$ 1,340	$ (1,090)
Gain (loss) on currency translation [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	1,208	(636)	577	(438)
Hedge ineffectiveness
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	0	(78)	70	(923)
Other non-operating income (expense) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	$ 132	$ 8	$ 693	$ 271