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Segment Reporting - Summary of Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | $ 74,660 | $ 63,773 | $ 144,054 | $ 135,193 |
Depreciation and amortization | (31,345) | (33,793) | (62,735) | (67,170) |
Property operating expenses, other operating and real estate taxes | (25,394) | (27,503) | (50,333) | (51,270) |
General and administrative expenses | (10,671) | (8,720) | (19,667) | (17,790) |
Impairment charges | 0 | 0 | 0 | (51,549) |
Gain on disposition of properties | 5,909 | 485 | 10,521 | 485 |
Operating income (loss) | 13,159 | (5,758) | 21,840 | (52,101) |
Interest income | 2,054 | 2,095 | 3,754 | 5,024 |
Realized and unrealized holding gains on investments and other | 2,711 | 87,811 | 9,218 | 87,281 |
Equity in earnings (losses) of unconsolidated affiliates | 1,106 | (786) | 3,369 | 469 |
Interest expense | (17,605) | (18,319) | (34,746) | (36,621) |
Income tax (provision) benefit | (194) | (137) | (344) | 815 |
Net (loss) income | 1,231 | 64,906 | 3,091 | 4,867 |
Net loss (income) attributable to noncontrolling interests | 2,687 | (45,496) | 5,989 | 6,129 |
Net (loss) income attributable to Acadia | 3,918 | 19,410 | 9,080 | 10,996 |
Real estate at cost | 4,043,253 | 4,162,224 | 4,043,253 | 4,162,224 |
Total assets | 4,089,612 | 4,328,748 | 4,089,612 | 4,328,748 | $ 4,186,882
Cash paid for acquisition of real estate |  |  | 0 | 21,208 |
Cash paid for development and property improvement costs |  |  | 16,620 | 20,533 |
Operating Segments | Core Portfolio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 46,000 | 38,602 | 88,350 | 78,535 |
Depreciation and amortization | (17,333) | (18,150) | (34,220) | (35,207) |
Property operating expenses, other operating and real estate taxes | (14,205) | (17,961) | (27,862) | (29,775) |
General and administrative expenses | 0 | 0 | 0 | 0 |
Impairment charges |  |  |  | 0 |
Gain on disposition of properties | 0 | 0 | 4,612 | 0 |
Operating income (loss) | 14,462 | 2,491 | 30,880 | 13,553 |
Interest income | 0 | 0 | 0 | 0 |
Realized and unrealized holding gains on investments and other | 0 | 0 | 0 | 0 |
Equity in earnings (losses) of unconsolidated affiliates | 669 | (1,070) | (459) | 572 |
Interest expense | (7,350) | (8,602) | (14,564) | (16,852) |
Income tax (provision) benefit | 0 | 0 | 0 | 0 |
Net (loss) income | 7,781 | (7,181) | 15,857 | (2,727) |
Net loss (income) attributable to noncontrolling interests | (406) | 5,068 | (1,013) | 6,284 |
Net (loss) income attributable to Acadia | 7,375 | (2,113) | 14,844 | 3,557 |
Real estate at cost | 2,323,767 | 2,362,334 | 2,323,767 | 2,362,334 |
Total assets | 2,209,033 | 2,323,986 | 2,209,033 | 2,323,986 |
Cash paid for acquisition of real estate |  |  | 0 | 19,963 |
Cash paid for development and property improvement costs |  |  | 5,465 | 6,443 |
Operating Segments | Opportunity Funds |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 28,660 | 25,171 | 55,704 | 56,658 |
Depreciation and amortization | (14,012) | (15,643) | (28,515) | (31,963) |
Property operating expenses, other operating and real estate taxes | (11,189) | (9,542) | (22,471) | (21,495) |
General and administrative expenses | 0 | 0 | 0 | 0 |
Impairment charges |  |  |  | (51,549) |
Gain on disposition of properties | 5,909 | 485 | 5,909 | 485 |
Operating income (loss) | 9,368 | 471 | 10,627 | (47,864) |
Interest income | 0 | 0 | 0 | 0 |
Realized and unrealized holding gains on investments and other | 2,841 | 87,751 | 9,388 | 87,751 |
Equity in earnings (losses) of unconsolidated affiliates | 437 | 284 | 3,828 | (103) |
Interest expense | (10,255) | (9,717) | (20,182) | (19,769) |
Income tax (provision) benefit | 0 | 0 | 0 | 0 |
Net (loss) income | 2,391 | 78,789 | 3,661 | 20,015 |
Net loss (income) attributable to noncontrolling interests | 3,093 | (50,564) | 7,002 | (155) |
Net (loss) income attributable to Acadia | 5,484 | 28,225 | 10,663 | 19,860 |
Real estate at cost | 1,719,486 | 1,799,890 | 1,719,486 | 1,799,890 |
Total assets | 1,763,299 | 1,870,070 | 1,763,299 | 1,870,070 |
Cash paid for acquisition of real estate |  |  | 0 | 1,245 |
Cash paid for development and property improvement costs |  |  | 11,155 | 14,090 |
Operating Segments | Structured Financing |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 0 | 0 | 0 | 0 |
Depreciation and amortization | 0 | 0 | 0 | 0 |
Property operating expenses, other operating and real estate taxes | 0 | 0 | 0 | 0 |
General and administrative expenses | 0 | 0 | 0 | 0 |
Impairment charges |  |  |  | 0 |
Gain on disposition of properties | 0 | 0 | 0 | 0 |
Operating income (loss) | 0 | 0 | 0 | 0 |
Interest income | 2,054 | 2,095 | 3,754 | 5,024 |
Realized and unrealized holding gains on investments and other | (130) | 60 | (170) | (470) |
Equity in earnings (losses) of unconsolidated affiliates | 0 | 0 | 0 | 0 |
Interest expense | 0 | 0 | 0 | 0 |
Income tax (provision) benefit | 0 | 0 | 0 | 0 |
Net (loss) income | 1,924 | 2,155 | 3,584 | 4,554 |
Net loss (income) attributable to noncontrolling interests | 0 | 0 | 0 | 0 |
Net (loss) income attributable to Acadia | 1,924 | 2,155 | 3,584 | 4,554 |
Real estate at cost | 0 | 0 | 0 | 0 |
Total assets | 117,280 | 134,692 | 117,280 | 134,692 |
Cash paid for acquisition of real estate |  |  | 0 | 0 |
Cash paid for development and property improvement costs |  |  | 0 | 0 |
Unallocated |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 0 | 0 | 0 | 0 |
Depreciation and amortization | 0 | 0 | 0 | 0 |
Property operating expenses, other operating and real estate taxes | 0 | 0 | 0 | 0 |
General and administrative expenses | (10,671) | (8,720) | (19,667) | (17,790) |
Impairment charges |  |  |  | 0 |
Gain on disposition of properties | 0 | 0 | 0 | 0 |
Operating income (loss) | (10,671) | (8,720) | (19,667) | (17,790) |
Interest income | 0 | 0 | 0 | 0 |
Realized and unrealized holding gains on investments and other | 0 | 0 | 0 | 0 |
Equity in earnings (losses) of unconsolidated affiliates | 0 | 0 | 0 | 0 |
Interest expense | 0 | 0 | 0 | 0 |
Income tax (provision) benefit | (194) | (137) | (344) | 815 |
Net (loss) income | (10,865) | (8,857) | (20,011) | (16,975) |
Net loss (income) attributable to noncontrolling interests | 0 | 0 | 0 | 0 |
Net (loss) income attributable to Acadia | (10,865) | (8,857) | (20,011) | (16,975) |
Real estate at cost | 0 | 0 | 0 | 0 |
Total assets | $ 0 | $ 0 | 0 | 0 |
Cash paid for acquisition of real estate |  |  | 0 | 0 |
Cash paid for development and property improvement costs |  |  | $ 0 | $ 0 |

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