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Investments in and Advances to Unconsolidated Affiliates (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notes receivable, net | $ 276,163 |  |  |  | $ 147,188 |  |  |  | $ 276,163 | $ 147,188 |
Combined and Condensed Balance Sheets |  |  |  |  |  |  |  |  |  |  |
Real estate under development, at cost | 543,486 |  |  |  | 609,574 |  |  |  | 543,486 | 609,574 |
Investments in and advances to unconsolidated affiliates | 272,028 |  |  |  | 173,277 |  |  |  | 272,028 | 173,277 |
Other assets | 192,786 |  |  |  | 123,789 |  |  |  | 192,786 | 123,789 |
Total assets | 3,995,960 |  |  |  | 3,032,319 |  |  |  | 3,995,960 | 3,032,319 |
Total liabilities and equity | 3,995,960 |  |  |  | 3,032,319 |  |  |  | 3,995,960 | 3,032,319 |
Investments in and advances to unconsolidated affiliates, net of Company's share of distributions in excess of income and investments in unconsolidated affiliates | 258,337 |  |  |  | 160,033 |  |  |  | 258,337 | 160,033 |
Combined and Condensed Statements of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenues | 54,121 | $ 43,855 | $ 43,918 | $ 48,045 | 51,286 | $ 51,124 | $ 49,176 | $ 49,073 | 189,939 | 199,063 | $ 179,681
Operating and other expenses |  |  |  |  |  |  |  |  | (168,050) | (154,601) | (128,749)
Equity in earnings (losses) of unconsolidated affiliates |  |  |  |  |  |  |  |  | 39,449 | 37,330 | 111,578
Depreciation and amortization |  |  |  |  |  |  |  |  | (70,011) | (60,751) | (49,645)
Income from continuing operations before gain on disposition of properties |  |  |  |  |  |  |  |  | 52,627 | 60,907 | 137,786
Equity Method Investee [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Related party revenue |  |  |  |  |  |  |  |  | 1,200 | 300 | 200
Expenses, related party |  |  |  |  |  |  |  |  | 1,100 | 800 | 2,800
Unconsolidated Affiliates [Member] |  |  |  |  |  |  |  |  |  |  |
Combined and Condensed Balance Sheets |  |  |  |  |  |  |  |  |  |  |
Rental property, net | 576,505 |  |  |  | 302,976 |  |  |  | 576,505 | 302,976 |
Real estate under development, at cost | 18,884 |  |  |  | 35,743 |  |  |  | 18,884 | 35,743 |
Investments in and advances to unconsolidated affiliates | 6,853 |  |  |  | 6,853 |  |  |  | 6,853 | 6,853 |
Other assets | 75,254 |  |  |  | 47,083 |  |  |  | 75,254 | 47,083 |
Total assets | 677,496 |  |  |  | 392,655 |  |  |  | 677,496 | 392,655 |
Mortgage notes payable | 407,344 |  |  |  | 262,130 |  |  |  | 407,344 | 262,130 |
Other liabilities | 30,117 |  |  |  | 21,945 |  |  |  | 30,117 | 21,945 |
Partners’ equity | 240,035 |  |  |  | 108,580 |  |  |  | 240,035 | 108,580 |
Total liabilities and equity | 677,496 |  |  |  | 392,655 |  |  |  | 677,496 | 392,655 |
Company's share of accumulated equity | 191,049 |  |  |  | 106,442 |  |  |  | 191,049 | 106,442 |
Basis differential | 61,827 |  |  |  | 11,620 |  |  |  | 61,827 | 11,620 |
Deferred fees, net of portion related to the Company's interest | 3,268 |  |  |  | 5,342 |  |  |  | 3,268 | 5,342 |
Amounts receivable by the Company | $ 2,193 |  |  |  | 36,629 |  |  |  | 2,193 | 36,629 |
Combined and Condensed Statements of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 84,218 | 43,990 | 44,422
Operating and other expenses |  |  |  |  |  |  |  |  | (25,724) | (13,721) | (17,069)
Interest expense |  |  |  |  |  |  |  |  | (16,300) | (9,178) | (9,363)
Equity in earnings (losses) of unconsolidated affiliates |  |  |  |  |  |  |  |  | 0 | 66,655 | (328)
Depreciation and amortization |  |  |  |  |  |  |  |  | (35,432) | (12,154) | (10,967)
Loss on debt extinguishment |  |  |  |  |  |  |  |  | 0 | 0 | (187)
(Loss) gain on disposition of properties |  |  |  |  |  |  |  |  | (1,340) | 32,623 | 142,615
Income from continuing operations before gain on disposition of properties |  |  |  |  |  |  |  |  | 5,422 | 108,215 | 149,123
Operating Partnership, as General Partner or Managing Member [Member] |  |  |  |  |  |  |  |  |  |  |
Combined and Condensed Statements of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates |  |  |  |  |  |  |  |  | 39,449 | 37,330 | 111,578
Company’s share of equity in net income of unconsolidated affiliates |  |  |  |  |  |  |  |  | 40,538 | 37,722 | 111,970
Basis differential adjustments |  |  |  |  |  |  |  |  | $ (1,089) | (392) | $ (392)
Broughton Street Portfolio [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notes receivable, net |  |  |  |  | $ 35,900 |  |  |  |  | 35,900 |
Mervyns I and Mervyns II [Member] | Unconsolidated Affiliates [Member] |  |  |  |  |  |  |  |  |  |  |
Combined and Condensed Statements of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates |  |  |  |  |  |  |  |  |  | $ 5,900 |

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