Fair Value of Financial Instruments (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ (300)	$ 400	$ 100	$ (300)
Derivative Assets and Liabilities at Fair Value [Abstract]
Fair value, assets	2,121		2,121		$ 2,935
Fair value, liabilities	(1,976)		(1,976)		(1,064)
Derivative Assets (Liabilities), at Fair Value, Net	145		145		1,871
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Forward contracts not designated as hedging instruments net realized gains (losses)	0	(700)	(200)	0
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	2,111		2,111		2,931
Fair value, liabilities	(1,920)		(1,920)		(1,026)
Derivative Assets (Liabilities), at Fair Value, Net	191		191		1,905
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	19,600		19,600
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	10		10		4
Fair value, liabilities	(56)		(56)		(38)
Derivative Assets (Liabilities), at Fair Value, Net	(46)		(46)		$ (34)
Cash Flow Hedging [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	101,100		101,100
Cash flow hedges realized gains	0	$ 2,400	500	$ 5,000
Unrealized gains on cash flow hedges in accumulated other comprehensive income (loss) expected to be recognized in the next fiscal year	$ 100		$ 100