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Debt -Notes - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Notes, net $ 4,848,477 $ 4,848,079
Notes Payable, Other Payables [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date Jun. 01, 2045  
Weighted Average Interest Rate 4.51%  
Notes Payable, Other Payables [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.375%  
Notes Payable, Other Payables [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 7.57%