Fair Value Measurements - Schedule of Carrying Amount and Estimated Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Loans receivable, net | $ 34,465 | $ 47,044 | |
| Revolving credit facilities | 116,500 | ||
| Term loans, net | $ 177,309 | ||
| Senior Unsecured Notes, net | 1,927,348 | 1,484,066 | |
| Convertible Notes, net | 189,102 | 336,402 | |
| Mortgages and notes payable, net | 212,582 | 216,049 | |
| Estimated Fair Value | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Loans receivable, net | 35,279 | ||
| 2019 Credit Facility | 119,802 | ||
| 2020 Term Loans, net | 177,884 | ||
| Senior Unsecured Notes, net | 2,122,409 | 1,543,919 | |
| Convertible Notes, net | 194,124 | 356,602 | |
| Mortgages and notes payable, net | $ 226,240 | $ 235,253 |