Fair Value of Financial Instruments (Foreign Currency Forward Contracts) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ 1,000,000	$ (1,600,000)	$ 700,000	$ 0
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Fair value, assets	1,731,000		1,731,000		5,083,000
Fair value, liabilities	(1,669,000)		(1,669,000)		(421,000)
Fair value, assets (liabilities), net	62,000		62,000		4,662,000
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	125,600,000		125,600,000
Cash flow hedges realized gains (losses)	1,000,000	(900,000)	3,200,000	(4,400,000)
Unrealized gain on cash flow hedges in accumulated other comprehensive income (loss)	100,000		100,000
Notional amount of forward contracts not designated as hedging instruments	41,300,000		41,300,000
Forward contracts not designated as hedging instruments net realized gains (losses)	(1,200,000)	1,700,000	(1,600,000)	0
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Fair value, assets	1,731,000		1,731,000		5,042,000
Fair value, liabilities	(1,577,000)		(1,577,000)		(326,000)
Fair value, assets (liabilities), net	154,000		154,000		4,716,000
Not Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Fair value, assets	0		0		41,000
Fair value, liabilities	(92,000)		(92,000)		(95,000)
Fair value, assets (liabilities), net	$ (92,000)		$ (92,000)		$ (54,000)