Debt - Summary of Components of Interest Expense Related to Borrowings (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Non-cash interest expense:        
Amortization of deferred financing costs     $ 5,155 $ 7,442
Amortization of debt discount, net     5,805 10,888
Total interest expense $ 24,675 $ 24,784 76,462 71,385
Revolving credit facilities        
Schedule Of Interest Expenses [Line Items]        
Facility fees 400 500 1,600 1,600
Continuing and discontinuing operations        
Non-cash interest expense:        
Amortization of deferred financing costs 1,350 1,890 5,155 7,442
Amortization of net losses related to interest rate swaps 156   156  
Amortization of debt discount, net 1,179 2,636 5,805 10,888
Total interest expense 24,675 24,784 76,462 117,906
Continuing and discontinuing operations | Revolving credit facilities        
Schedule Of Interest Expenses [Line Items]        
Interest expense 473 1,933 4,449 6,134
Continuing and discontinuing operations | Term loans        
Schedule Of Interest Expenses [Line Items]        
Interest expense 5,779 2,677 15,448 2,677
Continuing and discontinuing operations | Senior Unsecured Notes        
Schedule Of Interest Expenses [Line Items]        
Interest expense 8,446 3,338 15,299 10,013
Continuing and discontinuing operations | Mortgages and Notes Payable        
Schedule Of Interest Expenses [Line Items]        
Interest expense 3,637 6,183 15,168 62,370
Continuing and discontinuing operations | Convertible Notes        
Schedule Of Interest Expenses [Line Items]        
Interest expense 3,234 $ 6,127 14,010 $ 18,382
Continuing and discontinuing operations | Interest Rate Swaps/Other        
Schedule Of Interest Expenses [Line Items]        
Interest expense $ 421   $ 972