Derivatives (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency exchange contracts	$ 299	[1]	$ 96	[1]	$ 44	$ (118)	[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	$ 300		$ 100		$ 44	$ (100)

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