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Investments in and Advances to Unconsolidated Affiliates (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Combined and Condensed Balance Sheets |  |  |
Real estate under development, at cost | $ 510,548 |  | $ 543,486
Investments in and advances to unconsolidated affiliates | 260,497 |  | 272,028
Other assets | 201,822 |  | 192,786
Total assets | 4,014,902 |  | 3,995,960
Total liabilities and equity | 4,014,902 |  | 3,995,960
Investments in and advances to unconsolidated affiliates, net of Company's share of distributions in excess of income from and investments in unconsolidated affiliates | 245,276 |  | 258,337
Combined and Condensed Statements of Operations [Abstract] |  |  |
Total revenues | 61,999 | $ 48,045 |
Operating and other expenses | (52,102) | (38,194) |
Depreciation and amortization | (24,536) | (16,849) |
Income from continuing operations before gain on disposition of properties | 19,971 | 8,482 |
Company’s equity in earnings of unconsolidated affiliates | 12,703 | 1,954 |
Equity Method Investee [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Related party revenue | 400 | 100 |
Expenses, related party | 500 | $ 600 |
Unconsolidated Affiliates [Member] |  |  |
Combined and Condensed Balance Sheets |  |  |
Rental property, net | 549,632 |  | 576,505
Real estate under development, at cost | 16,837 |  | 18,884
Investments in and advances to unconsolidated affiliates | 6,853 |  | 6,853
Other assets | 101,144 |  | 75,254
Total assets | 674,466 |  | 677,496
Mortgage notes payable | 389,198 |  | 407,344
Other liabilities | 58,909 |  | 30,117
Partners’ equity | 226,359 |  | 240,035
Total liabilities and equity | 674,466 |  | 677,496
Company's share of accumulated equity | 177,805 |  | 191,049
Basis differential | 60,520 |  | 61,827
Deferred fees, net of portion related to the Company's interest | 4,678 |  | 3,268
Amounts receivable by the Company | 2,273 |  | 2,193
Combined and Condensed Statements of Operations [Abstract] |  |  |
Total revenues | 21,603 |  | 13,372
Operating and other expenses | (5,866) |  | (3,730)
Interest expense | (4,538) |  | (2,736)
Depreciation and amortization | (6,449) |  | (3,880)
Loss on debt extinguishment | (151) |  | 0
Gain on disposition of properties | 14,446 |  | 0
Income from continuing operations before gain on disposition of properties | 19,045 |  | 3,026
Operating Partnership, as General Partner or Managing Member [Member] |  |  |
Combined and Condensed Statements of Operations [Abstract] |  |  |
Company’s share of equity in net income of unconsolidated affiliates | 13,569 |  | 2,052
Basis differential amortization | (866) |  | (98)
Company’s equity in earnings of unconsolidated affiliates | $ 12,703 |  | $ 1,954

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