| **Real Estate Joint Ventures - Summarized Statements of Operations for Unconsolidated Investments (Details) - USD ($) $ in Thousands** | 3 Months Ended | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Investments in and Advances to Affiliates [Line Items]**                                                                             |           |            |   |   |   |   |   |   |   |   |   |
| Operating revenue                                                                                                                      | $ 18,747       | $ 27,192        | $ 29,551 | $ 20,254 | $ 21,104 | $ 27,830 | $ 37,846 | $ 17,091 | $ 95,744 | $ 103,871 | $ 701,873 |
| Total expenses                                                                                                                         |           |            |   |   |   |   |   |   | 93,784 | 110,006 | 188,623 |
| Net loss                                                                                                                               |           |            |   |   |   |   |   |   | (15,464) | 1,971 | (406,282) |
| Statements Of Operations                                                                                                               |           |            |   |   |   |   |   |   |   |   |   |
| **Investments in and Advances to Affiliates [Line Items]**                                                                             |           |            |   |   |   |   |   |   |   |   |   |
| Operating revenue                                                                                                                      |           |            |   |   |   |   |   |   | 371 | 0 | 5 |
| Total expenses                                                                                                                         |           |            |   |   |   |   |   |   | 1,159 | 3,073 | 1,957 |
| Net loss                                                                                                                               |           |            |   |   |   |   |   |   | 788 | $ 3,073 | $ 1,952 |
| Artisan Park, L.L.C | Consolidated Variable Interest Entities                                                                          |           |            |   |   |   |   |   |   |   |   |   |
| **Investments in and Advances to Affiliates [Line Items]**                                                                             |           |            |   |   |   |   |   |   |   |   |   |
| Operating revenue                                                                                                                      |           |            |   |   |   |   |   |   | $ 400 |   |   |

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).
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