Derivatives (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency exchange contracts	$ (57)	[1]	$ (254)	[1]	$ (255)	[1]	$ (214)	[1]
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member] | Other Income (Expense), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency exchange contracts	$ (100)		$ (300)		$ (300)		$ (200)

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