Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated Other Comprehensive Income (Loss), Beginning balance $ 4,111  
Other comprehensive income (loss) before reclassifications 6,570  
Amounts reclassified from accumulated other comprehensive income (2,561) [1]  
Net current-period other comprehensive income (loss) 4,009 (966)
Accumulated Other Comprehensive Income (loss) , Ending balance 8,120  
Unrealized Gains and Losses on Cash Flow Hedges    
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated Other Comprehensive Income (Loss), Beginning balance 1,366  
Other comprehensive income (loss) before reclassifications 6,298  
Amounts reclassified from accumulated other comprehensive income (2,558) [1]  
Net current-period other comprehensive income (loss) 3,740  
Accumulated Other Comprehensive Income (loss) , Ending balance 5,106  
Unrealized Gains and Losses on Available-for-Sale Securities    
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated Other Comprehensive Income (Loss), Beginning balance (52)  
Other comprehensive income (loss) before reclassifications 89  
Amounts reclassified from accumulated other comprehensive income (3) [1]  
Net current-period other comprehensive income (loss) 86  
Accumulated Other Comprehensive Income (loss) , Ending balance 34  
Foreign Currency Translation    
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated Other Comprehensive Income (Loss), Beginning balance 2,797  
Other comprehensive income (loss) before reclassifications 183  
Net current-period other comprehensive income (loss) 183  
Accumulated Other Comprehensive Income (loss) , Ending balance $ 2,980  
[1] See Note 12 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), net” in the condensed consolidated statement of operations for the three months ended March 31, 2015, net of taxes.