Debt - Debt Extinguishment - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Property
loan
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Property
loan
Jun. 30, 2018
USD ($)
Debt Instrument [Line Items]        
Gain (loss) on debt extinguishment $ (14,676) $ 5,509 $ (5,893) $ 27,092
Master Trust Notes | Series 2013-2, Class A        
Debt Instrument [Line Items]        
Gain (loss) on debt extinguishment     (14,700)  
Mortgages        
Debt Instrument [Line Items]        
Debt extinguished     $ 10,400 $ 179,300
Number of loans paid off | loan 1   1  
Number of real estate properties, securing debt | Property 1   1  
Weighted average contractual interest rate 9.85% 5.69% 9.85% 5.69%
Gain (loss) on debt extinguishment     $ 9,500 $ 26,700
Mortgages | Master Trust Notes | Series 2013-2, Class A        
Debt Instrument [Line Items]        
Debt extinguished       123,100
Mortgages | CMBS        
Debt Instrument [Line Items]        
Debt extinguished       $ 56,200
Revolving Credit Facility And Term Loan        
Debt Instrument [Line Items]        
Gain (loss) on debt extinguishment     $ (700)