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Segment Reporting - Summary of Segment Information (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Net income attributable to Acadia | $ (8,414) | $ 12,197 |
Real estate at cost | 4,082,116 | 3,755,591 |
Total assets | 4,305,138 | 4,044,041 | $ 4,309,114
Net (income) loss attributable to noncontrolling interests | (51,625) | (9,261) |
Opportunity Funds | Fund II's City Point Property |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate at cost | 603,400 |  |
Total assets | 603,300 |  |
Net (income) loss attributable to noncontrolling interests | 175,600 |  | $ 174,700
Operating Segments | Core Portfolio |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income attributable to Acadia | 5,671 | 14,548 |
Real estate at cost | 2,289,449 | 2,114,727 |
Total assets | 2,330,971 | 2,244,349 |
Net (income) loss attributable to noncontrolling interests | (1,216) | 41 |
Operating Segments | Core Portfolio | Town Center |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income attributable to Acadia | 1,000 | 1,200 |
Operating Segments | Opportunity Funds |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income attributable to Acadia | (8,366) | 3,656 |
Real estate at cost | 1,792,667 | 1,640,864 |
Total assets | 1,801,008 | 1,684,757 |
Net (income) loss attributable to noncontrolling interests | $ (50,409) | $ (9,302) |

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