Fair Value of Financial Instruments (Foreign Currency Forward Contracts) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ (1,500,000)	$ 400,000
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Fair value, assets	2,452,000		457,000
Fair value, liabilities	(942,000)		(2,399,000)
Fair value, assets (liabilities), net	1,510,000		(1,942,000)
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	89,600,000
Cash flow hedges realized gains (losses)	100,000	800,000
Unrealized gain (loss) on cash flow hedges in accumulated other comprehensive income (loss) expected to be recognized in the next fiscal year	1,000,000
Notional amount of forward contracts not designated as hedging instruments	45,500,000
Forward contracts not designated as hedging instruments net realized gains (losses)	800,000	(700,000)
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	2,447,000
Fair value, liabilities	(866,000)
Fair value, assets (liabilities), net	1,581,000
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Current Liabilities [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Fair value, assets			457,000
Fair value, liabilities			(2,249,000)
Fair value, assets (liabilities), net			(1,792,000)
Not 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	5,000
Fair value, liabilities	(76,000)
Fair value, assets (liabilities), net	(71,000)
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Current Liabilities [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Fair value, assets			0
Fair value, liabilities			(150,000)
Fair value, assets (liabilities), net			$ (150,000)