Fair Value Measurements - Summary of Fair Value Information for Financial Instruments (Details) - USD ($)
$ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Loans receivable, net |
$ 48,740
|
$ 82,886
|
| Investment in Master Trust 2014 |
33,811
|
0
|
| 2015 Credit Facility, net |
146,731
|
111,997
|
| Convertible Notes, net |
740,330
|
761,440
|
| 2015 Term Loan |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Term Loan, net |
424,670
|
0
|
| Senior Unsecured Notes |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Senior Unsecured Notes/ Mortgages and notes payable, net |
291,696
|
299,049
|
| Mortgages and Notes Payable |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Senior Unsecured Notes/ Mortgages and notes payable, net |
487,548
|
2,657,599
|
| Carrying Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Loans receivable, net |
47,044
|
79,967
|
| Investment in Master Trust 2014 |
33,535
|
0
|
| 2015 Credit Facility, net |
146,300
|
112,000
|
| Convertible Notes, net |
729,814
|
715,881
|
| Carrying Value | 2015 Term Loan |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Term Loan, net |
419,560
|
0
|
| Carrying Value | Senior Unsecured Notes |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Senior Unsecured Notes/ Mortgages and notes payable, net |
295,767
|
295,321
|
| Carrying Value | Mortgages and Notes Payable |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Senior Unsecured Notes/ Mortgages and notes payable, net |
$ 463,196
|
$ 2,516,478
|