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
Mar. 31, 2018
Mar. 31, 2017
Revenues    
Subscriber revenue $ 1,117,084 $ 1,078,257
Expenses    
Revenue share and royalties 310,132 277,300
Subscriber acquisition costs 122,693 127,488
Income tax expense (80,249) (113,973)
Net income 289,441 $ 207,073
Impact of Adopting ASU 2014-09 | Adjustments Due to ASU 2014-09    
Revenues    
Subscriber revenue 24,392  
Expenses    
Revenue share and royalties 22,069  
Subscriber acquisition costs 1,046  
Income tax expense (277)  
Net income 1,000  
Balances Without Adoption of ASU 2014-09    
Revenues    
Subscriber revenue 1,141,476  
Expenses    
Revenue share and royalties 332,201  
Subscriber acquisition costs 123,739  
Income tax expense (80,526)  
Net income $ 290,441