Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			$ 4,372
Other comprehensive income (loss) before reclassifications			1,624
Amounts reclassified from accumulated other comprehensive income			(794)	[1]
Net current-period other comprehensive income (loss)	1,360	(1,623)	830		92
Accumulated Other Comprehensive Income (loss) , Ending balance	5,202		5,202
Unrealized Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			80
Other comprehensive income (loss) before reclassifications			2,574
Amounts reclassified from accumulated other comprehensive income			(785)	[1]
Net current-period other comprehensive income (loss)			1,789
Accumulated Other Comprehensive Income (loss) , Ending balance	1,869		1,869
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			73
Other comprehensive income (loss) before reclassifications			(43)
Amounts reclassified from accumulated other comprehensive income			(9)	[1]
Net current-period other comprehensive income (loss)			(52)
Accumulated Other Comprehensive Income (loss) , Ending balance	21		21
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			4,219
Other comprehensive income (loss) before reclassifications			(907)
Net current-period other comprehensive income (loss)			(907)
Accumulated Other Comprehensive Income (loss) , Ending balance	$ 3,312		$ 3,312

[1] See Note 13 of Notes to Condensed Consolidated Financial Statements for details of gains and losses, net of taxes, reclassified out of accumulated other comprehensive income into net income related to cash flow hedges and each line item of net income affected by the reclassification. Gains and losses related to available-for-sale securities were reclassified into “Other income (expense)” in the condensed consolidated statement of operations for the nine months ended September 30, 2014, net of taxes.