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Segment and Geographic Information - Narrative (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
segment
country
Dec. 31, 2014
USD ($)
country
Dec. 31, 2013
USD ($)
country
Segment Reporting Information [Line Items]                      
Number of operating segments (in number of segments) | segment                 1    
Property and equipment, net $ 753,180       $ 601,591       $ 753,180 $ 601,591  
Revenue 579,159 $ 551,030 $ 540,723 $ 526,536 536,295 $ 498,042 $ 476,035 $ 453,502 2,197,448 1,963,874 $ 1,577,922
United States                      
Segment Reporting Information [Line Items]                      
Property and equipment, net 298,900       249,500       298,900 249,500  
Foreign locations                      
Segment Reporting Information [Line Items]                      
Property and equipment, net $ 227,800       $ 175,800       227,800 175,800  
Revenue                 $ 593,000 $ 531,900 $ 432,600
Sales | Geographic Concentration Risk                      
Segment Reporting Information [Line Items]                      
Concentration risk, number of foreign countries (in number of countries) | country                 0 0 0
Concentration risk, percentage (in percentage)                 10.00% 10.00% 10.00%