Debt - Summary of Components of Interest Expense Related to Borrowings (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Non-cash interest expense:        
Amortization of deferred financing costs     $ 5,552 $ 4,823
Amortization of debt discount, net     8,252 6,304
Total interest expense $ 23,548 $ 28,051 46,601 55,857
Revolving Credit Facility        
Non-cash interest expense:        
Facility fees 600 500 1,100 1,100
Continuing and discontinuing operations        
Non-cash interest expense:        
Amortization of deferred financing costs 2,573 2,423 5,552 4,823
Amortization of debt discount, net 3,689 3,242 8,252 6,304
Total interest expense 42,056 46,826 93,122 93,449
Continuing and discontinuing operations | Revolving Credit Facility        
Schedule Of Interest Expenses [Line Items]        
Interest expense 2,849 1,325 4,201 2,557
Continuing and discontinuing operations | Term Loan        
Schedule Of Interest Expenses [Line Items]        
Interest expense 0 2,511 0 4,757
Continuing and discontinuing operations | Senior Unsecured Notes        
Schedule Of Interest Expenses [Line Items]        
Interest expense 3,337 3,338 6,675 6,675
Continuing and discontinuing operations | Mortgages and Notes Payable        
Schedule Of Interest Expenses [Line Items]        
Interest expense 23,480 27,860 56,187 56,078
Continuing and discontinuing operations | Convertible Notes        
Schedule Of Interest Expenses [Line Items]        
Interest expense $ 6,128 $ 6,127 $ 12,255 $ 12,255