Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at balance sheet date			$ 917	$ (306)
Other comprehensive (loss) income before reclassifications			4,094	1,894
Amounts reclassified from accumulated other comprehensive loss			(3,500)	(427)
Total changes in other comprehensive loss	$ 3,218	$ 1,184	594	1,467
Balance at balance sheet date	1,511	1,161	1,511	1,161
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at balance sheet date			(971)	(325)
Other comprehensive (loss) income before reclassifications			(164)	(271)
Amounts reclassified from accumulated other comprehensive loss			0	0
Total changes in other comprehensive loss			(164)	(271)
Balance at balance sheet date	(1,135)	(596)	(1,135)	(596)
Unrealized Holding Gains (Losses) on Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at balance sheet date			(123)	42
Other comprehensive (loss) income before reclassifications			186	25
Amounts reclassified from accumulated other comprehensive loss			0	0
Total changes in other comprehensive loss			186	25
Balance at balance sheet date	63	67	63	67
Unrealized Gains (Losses) on Foreign Currency Forward Contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at balance sheet date			2,011	(23)
Other comprehensive (loss) income before reclassifications			4,072	2,140
Amounts reclassified from accumulated other comprehensive loss			(3,500)	(427)
Total changes in other comprehensive loss			572	1,713
Balance at balance sheet date	$ 2,583	$ 1,690	$ 2,583	$ 1,690