v2.4.0.8
Schedule of Revenue by Geographic Area (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Revenues from External Customers and Long-Lived Assets    
Revenue $ 1,625,777 $ 1,195,997
United States
   
Revenues from External Customers and Long-Lived Assets    
Revenue 1,107,870 889,341
United Kingdom
   
Revenues from External Customers and Long-Lived Assets    
Revenue 316,946 212,609
Other countries
   
Revenues from External Customers and Long-Lived Assets    
Revenue $ 200,961 $ 94,047