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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended
Feb. 21, 2018
USD ($)
Jan. 23, 2018
USD ($)
$ / shares
shares
Jan. 04, 2018
Jan. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
segment
$ / shares
shares
Mar. 31, 2017
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
$ / shares
shares
Debt Instrument [Line Items]                
Number of operating segments | segment         1      
Stock split, conversion ratio     1.681          
Noncurrent restricted cash and cash equivalents         $ 750,000      
Subscriber system assets, depreciation expense         136,000 $ 133,000    
Money market funds         145,000     $ 51,000
Guarantor obligations, current carrying value         55,000     54,000
Amount awarded from other party       $ 10,000        
Settlement non-cash amount         7,500      
Settlement cash amount         $ 24,000      
Payment term         48 months      
Term of customer relationship         15 years      
Retained earnings (accumulated deficit)         $ (1,148,059)   $ (963,782) (998,212)
Deferred tax liabilities         $ 1,381,723   1,388,594 $ 1,376,708
Mandatorily redeemable preferred securities outstanding (in shares) | shares         750,000     750,000
Mandatorily redeemable preferred securities par value (in dollars per share) | $ / shares         $ 0.01     $ 0.01
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09                
Debt Instrument [Line Items]                
Retained earnings (accumulated deficit)         $ 39,535   34,430  
Deferred tax liabilities         $ 13,543   $ 11,886  
Minimum                
Debt Instrument [Line Items]                
Contract term         3 years      
Maximum                
Debt Instrument [Line Items]                
Contract term         5 years      
Senior Notes | Prime Notes                
Debt Instrument [Line Items]                
Repayments of senior debt $ 649,000              
Repurchased face amount $ 594,000              
Interest rate 9.25%              
Long-term debt, gross         $ 2,546,000      
IPO                
Debt Instrument [Line Items]                
Shares issued in public offering (in shares) | shares   105,000,000            
Shares issued, price per share (in dollars per share) | $ / shares   $ 14.00            
Proceeds from initial public offering   $ 1,415,000            
Stock issuance expense   10,000            
Stock issuance expense incurred but not yet paid   $ 5,000            
Mandatorily Redeemable Preferred Stock                
Debt Instrument [Line Items]                
Mandatorily redeemable preferred securities outstanding (in shares) | shares         750,000