Derivatives (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Derivative Instruments, Loss [Line Items]
Maximum Remaining Maturity of Foreign Currency Derivatives					9 months
Net loss on foreign currency exchange contracts	$ 216	[1]	$ 57	[1]	$ 1,265	[1]	$ 255	[1]
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member] | Other Income (Expense), Net [Member]
Derivative Instruments, Loss [Line Items]
Net loss on foreign currency exchange contracts	$ 200		$ 100		$ 1,300		$ 300

[1] This represents the gains and (losses) incurred on foreign currency hedging derivatives (see Note 16 for further details).