XML 55 R45.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Jan. 01, 2018
Dec. 31, 2017
Dec. 31, 2016
New Accounting Pronouncement, Early Adoption [Line Items]          
Increase to cash flows provided by operating activities $ (46,566) $ (35,686)      
Decrease to cash flows provided by investing activities 370,174 (474,924)      
Cash and cash equivalents 366,723 897,487   $ 657,688 $ 328,744
Restricted cash included in deferred expenses and other assets, net 20,421 26,290   20,045 25,883
Total cash, cash equivalents and restricted cash reported in the consolidated statements of cash flows 387,144 923,777   677,733 354,627
Other investments 422,853     321,241  
Total assets 4,450,059     4,731,078  
Retained earnings (deficit) (2,368,162)     (2,470,564)  
Total equity $ 1,015,897 1,034,481   $ 914,249 $ 1,059,684
Accounting Standards Update 2016-15          
New Accounting Pronouncement, Early Adoption [Line Items]          
Increase to cash flows provided by operating activities   1,100      
Decrease to cash flows provided by investing activities   1,100      
Accounting Standards Update 2016-18          
New Accounting Pronouncement, Early Adoption [Line Items]          
Increase to cash flows provided by operating activities   700      
Decrease to cash flows provided by investing activities   $ 300      
Accounting Standards Update 2017-05          
New Accounting Pronouncement, Early Adoption [Line Items]          
Other investments     $ 397,110    
Total assets     4,806,947    
Retained earnings (deficit)     (2,394,695)    
Total equity     990,118    
Adjustment [Member] | Accounting Standards Update 2017-05          
New Accounting Pronouncement, Early Adoption [Line Items]          
Other investments     75,869    
Total assets     75,869    
Retained earnings (deficit)     75,869    
Total equity     $ 75,869