Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Impact of ASU 2014-09 in the Unaudited Consolidated Statements of Comprehensive Income (Details)

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Summary of Significant Accounting Policies - Impact of ASU 2014-09 in the Unaudited Consolidated Statements of Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Revenues        
Total revenue $ 1,432,299 $ 1,347,569 $ 2,807,401 $ 2,641,635
Expenses        
Subscriber acquisition costs 119,778 125,154 242,471 252,642
Income tax expense (70,570) (119,513) (150,819) (233,486)
Net income 292,352 202,109 581,793 409,182
Impact of Adopting ASU 2014-09 | Adjustments Due to ASU 2014-09        
Expenses        
Subscriber acquisition costs 800   1,845  
Income tax expense (146)   (418)  
Net income 606   1,612  
Balances Without Adoption of ASU 2014-09        
Expenses        
Subscriber acquisition costs 120,578   244,316  
Income tax expense (70,716)   (151,237)  
Net income 292,958   583,405  
Subscriber revenue        
Revenues        
Total revenue 1,138,962 1,111,011 2,256,046 2,189,268
Subscriber revenue | Impact of Adopting ASU 2014-09 | Adjustments Due to ASU 2014-09        
Revenues        
Total revenue 23,787   48,179  
Subscriber revenue | Balances Without Adoption of ASU 2014-09        
Revenues        
Total revenue 1,162,749   2,304,225  
Revenue share and royalties        
Expenses        
Cost of services 404,284 $ 292,893 714,416 $ 570,193
Revenue share and royalties | Impact of Adopting ASU 2014-09 | Adjustments Due to ASU 2014-09        
Expenses        
Cost of services 22,235   44,304  
Revenue share and royalties | Balances Without Adoption of ASU 2014-09        
Expenses        
Cost of services $ 426,519   $ 758,720