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Real Estate - Schedule of Acquisitions and Conversions (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |
Purchase Price | $ 324,339 | $ 186,463
Core Portfolio |  |
Business Acquisition [Line Items] |  |
Purchase Price | $ 146,435 | $ 1,337
Core Portfolio | 849, 907 and 912 W. Armitage - Chicago, IL |  |
Business Acquisition [Line Items] |  |
Percent Acquired | 100.00% |
Purchase Price | $ 10,738 |
Core Portfolio | 8436-8452 Melrose Place - Los Angeles, CA |  |
Business Acquisition [Line Items] |  |
Percent Acquired | 100.00% |
Purchase Price | $ 48,691 |
Core Portfolio | Soho Acquisitions | 41,45, 47, 51 and 53 Greene Street - New York, NY |  |
Business Acquisition [Line Items] |  |
Percent Acquired | 100.00% |
Purchase Price | $ 87,006 |
Core Portfolio | Bedford Green Land Parcel | Bedford Hills N Y |  |
Business Acquisition [Line Items] |  |
Percent Acquired |  | 100.00%
Purchase Price |  | $ 1,337
Fund V |  |
Business Acquisition [Line Items] |  |
Purchase Price | $ 177,904 | $ 149,022
Fund V | Palm Coast Landing | Palm Coast, FL |  |
Business Acquisition [Line Items] |  |
Percent Acquired | 100.00% |
Purchase Price | $ 36,644 |
Fund V | Lincoln Commons | Lincoln, RI |  |
Business Acquisition [Line Items] |  |
Percent Acquired | 100.00% |
Purchase Price | $ 54,299 |
Fund V | Landstown Commons | Virginia Beach, VA |  |
Business Acquisition [Line Items] |  |
Percent Acquired | 100.00% |
Purchase Price | $ 86,961 |
Fund V | Trussville Promenade - Trussville, AL | Trussville, AL |  |
Business Acquisition [Line Items] |  |
Percent Acquired |  | 100.00%
Purchase Price |  | $ 45,259
Fund V | Elk Grove Commons - Elk Grove, CA | Elk Grove, CA |  |
Business Acquisition [Line Items] |  |
Percent Acquired |  | 100.00%
Purchase Price |  | $ 59,320
Fund V | Hiram Pavilion | Hiram G A |  |
Business Acquisition [Line Items] |  |
Percent Acquired |  | 100.00%
Purchase Price |  | $ 44,443
Fund IV |  |
Business Acquisition [Line Items] |  |
Purchase Price |  | $ 36,104
Fund IV | Broughton Street Partners I | Savannah G A |  |
Business Acquisition [Line Items] |  |
Percent Acquired |  | 100.00%
Purchase Price |  | $ 36,104

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