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Segment Reporting - Summary of Segment Information (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |  |
Net income attributable to Acadia | $ 19,410 | $ 9,080 | $ 10,996 | $ 21,277 |
Real estate at cost | 4,162,224 | 3,939,525 | 4,162,224 | 3,939,525 |
Total assets | 4,328,748 | 4,209,922 | 4,328,748 | 4,209,922 | $ 4,309,114
Net (income) loss attributable to noncontrolling interests | 45,496 | (14,317) | (6,129) | (23,578) |
Opportunity Funds | Fund II's City Point Property |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Real estate at cost | 604,800 |  | 604,800 |  |
Total assets | 603,300 |  | 603,300 |  |
Net (income) loss attributable to noncontrolling interests |  |  | 176,000 |  | $ 174,700
Operating Segments | Core Portfolio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net income attributable to Acadia | (2,113) | 13,070 | 3,557 | 27,622 |
Real estate at cost | 2,362,334 | 2,154,630 | 2,362,334 | 2,154,630 |
Total assets | 2,323,986 | 2,267,022 | 2,323,986 | 2,267,022 |
Net (income) loss attributable to noncontrolling interests | (5,068) | (425) | (6,284) | (385) |
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 | 28,225 | 3,080 | 19,860 | 6,732 |
Real estate at cost | 1,799,890 | 1,784,895 | 1,799,890 | 1,784,895 |
Total assets | 1,870,070 | 1,848,238 | 1,870,070 | 1,848,238 |
Net (income) loss attributable to noncontrolling interests | $ 50,564 | $ (13,892) | $ 155 | $ (23,193) |

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