Fair Value of Financial Instruments (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ 400	$ 500	$ (300)	$ 200
Derivative Asset [Abstract]
Fair value, assets	5,127		5,127		$ 6,211
Fair value, liabilities	(911)		(911)		(1,032)
Derivative Assets (Liabilities), at Fair Value, Net	4,216		4,216		5,179
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Forward contracts not designated as hedging instruments net realized gains (losses)	(700)	(700)	0	(500)
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Asset [Abstract]
Fair value, assets	5,127		5,127		6,167
Fair value, liabilities	(875)		(875)		(971)
Derivative Assets (Liabilities), at Fair Value, Net	4,252		4,252		5,196
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	30,300		30,300
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Asset [Abstract]
Fair value, assets	0		0		44
Fair value, liabilities	(36)		(36)		(61)
Derivative Assets (Liabilities), at Fair Value, Net	(36)		(36)		$ (17)
Cash Flow Hedging [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	70,000		70,000
Cash flow hedges realized gains (losses)	2,400	$ (400)	5,000	$ (600)
Unrealized gain (loss) on cash flow hedges in accumulated other comprehensive income (loss) expected to be recognized in the next fiscal year	$ 2,700		$ 2,700