Fair Value of Financial Instruments (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ (800)	$ (500)	$ (1,100)	$ (300)
Derivative Assets and Liabilities at Fair Value [Abstract]
Fair value, assets	4,917		4,917		$ 6,211
Fair value, liabilities	(1,279)		(1,279)		(1,032)
Derivative Assets (Liabilities), at Fair Value, Net	3,638		3,638		5,179
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Forward contracts not designated as hedging instruments net realized gains (losses)	900	300	800	(300)
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Assets and Liabilities at Fair Value [Abstract]
Fair value, assets	4,912		4,912		6,167
Fair value, liabilities	(1,233)		(1,233)		(971)
Derivative Assets (Liabilities), at Fair Value, Net	3,679		3,679		5,196
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	27,700		27,700
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Assets and Liabilities at Fair Value [Abstract]
Fair value, assets	5		5		44
Fair value, liabilities	(46)		(46)		(61)
Derivative Assets (Liabilities), at Fair Value, Net	(41)		(41)		$ (17)
Cash Flow Hedging [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	98,100		98,100
Cash flow hedges realized gains (losses)	2,300	$ 100	7,300	$ (500)
Unrealized gains on cash flow hedges in accumulated other comprehensive income (loss) expected to be recognized in the next fiscal year	$ 2,300		$ 2,300