Debt - Summary of Components of Interest Expense Related to Borrowings (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Non-cash interest expense:        
Amortization of deferred financing costs     $ 3,805 $ 5,552
Amortization of debt discount, net     4,626 8,252
Total interest expense $ 25,176 $ 23,548 51,787 46,601
Revolving credit facilities        
Schedule Of Interest Expenses [Line Items]        
Facility fees 500 600 1,200 1,100
Continuing and discontinuing operations        
Non-cash interest expense:        
Amortization of deferred financing costs 1,774 2,573 3,805 5,552
Amortization of debt discount, net 1,920 3,689 4,626 8,252
Total interest expense 25,176 42,056 51,787 93,122
Continuing and discontinuing operations | Revolving credit facilities        
Schedule Of Interest Expenses [Line Items]        
Interest expense 1,798 2,849 3,976 4,201
Continuing and discontinuing operations | Term loans        
Schedule Of Interest Expenses [Line Items]        
Interest expense 5,691 0 9,669 0
Continuing and discontinuing operations | Senior Unsecured Notes        
Schedule Of Interest Expenses [Line Items]        
Interest expense 3,515 3,337 6,853 6,675
Continuing and discontinuing operations | Mortgages and Notes Payable        
Schedule Of Interest Expenses [Line Items]        
Interest expense 5,829 23,480 12,082 56,187
Continuing and discontinuing operations | Convertible Notes        
Schedule Of Interest Expenses [Line Items]        
Interest expense $ 4,649 $ 6,128 $ 10,776 $ 12,255