Annual report pursuant to Section 13 and 15(d)

Schedule I—Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details)

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Schedule I—Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]        
Net cash used in operating activities $ (265,622) $ (124,119) $ (52,436)  
Cash flows from investing activities        
Net cash provided by (used in) investing activities (659,423) (211,987) (29,423)  
Cash flows from financing activities        
Proceeds from issuance of debt 7,073,000 3,584,500 4,504,478  
Payments related to tax withholdings for share-based compensation (61,175) (112,324) (136,367)  
Proceeds from exercise of stock options 2,279 10,805 3,698  
Other 1,524 3,605 3,382  
Net cash provided by (used in) financing activities 378,574 1,122,847 840,990  
Net increase (decrease) in cash and cash equivalents (546,471) 786,741 759,131  
Cash and cash equivalents—beginning of period 1,747,583 960,842 201,711  
Cash and cash equivalents—end of period 1,747,583 960,842 201,711 $ 1,201,112
Parent Company [Member]        
Condensed Financial Statements, Captions [Line Items]        
Net cash used in operating activities (117,915) (240) (5,796)  
Cash flows from investing activities        
Investments in affiliates (320,584) (901,329) 139,494  
Net cash provided by (used in) investing activities (320,584) (901,329) 139,494  
Cash flows from financing activities        
Proceeds from issuance of debt 500,000 1,000,000 0  
Proceeds from sale of common stock, net 0 0 3,628  
Payments related to tax withholdings for share-based compensation (61,179) (112,324) (140,711)  
Excess tax benefit from share-based compensation 1,524 3,605 3,385  
Proceeds from exercise of stock options 2,283 10,806 0  
Other (4,129) (518) 0  
Net cash provided by (used in) financing activities 438,499 901,569 (133,698)  
Net increase (decrease) in cash and cash equivalents 0 0 0  
Cash and cash equivalents—beginning of period 0 0 0  
Cash and cash equivalents—end of period $ 0 $ 0 $ 0 $ 0