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Notes Payable, net - Summary of Notes Payable (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]    
Notes payable $ 2,616,568 $ 2,707,839
Deferred financing costs, net (17,788) (19,829)
Notes payable, net 2,598,780 2,688,010
Prepaid expenses and other assets, net    
Short-term Debt [Line Items]    
Deferred financing costs $ 1,200 $ 1,500