Segment Reporting - Summary of Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022		Jun. 30, 2021		Dec. 31, 2021
Segment Reporting Information [Line Items]
Total revenues		$ 84,259		$ 73,057		$ 165,766		$ 141,244
Depreciation and amortization		(34,971)		(30,540)		(68,684)		(61,180)
Property operating expenses and real estate taxes		(25,195)		(24,850)		(49,825)		(49,265)
General and administrative expenses		(10,661)		(10,653)		(22,598)		(19,645)
Gain on disposition of properties		12,216		5,909		41,031		10,521
Operating income		25,648		12,923		65,690		21,675
Interest and other income		2,961		2,054		5,896		3,754
Realized and unrealized holding gains (losses) on investments and other		(26,283)		1,842		(10,553)		6,967
Equity in (losses) earnings of unconsolidated affiliates		1,280		899		4,410		2,781
Interest expense		(19,222)		(17,074)		(37,147)		(33,688)
Income tax provision		(209)		(192)		(24)		(340)
Net (loss) Income		(15,825)		452		28,272		1,149
Net (income) loss attributable to noncontrolling interests		15,451		3,259		(11,808)		7,379
Net income (loss) attributable to Acadia		(374)		3,711		16,464		8,528
Real estate at cost	[1]	4,335,157		3,973,434		4,335,157		3,973,434
Total assets		4,438,884	[1]	4,029,293	[1]	4,438,884	[1]	4,029,293	[1]	$ 4,261,746
Cash paid for acquisition of real estate						242,633		0
Cash paid for development and property improvement costs						25,281		15,740
Operating Segments | Core Portfolio
Segment Reporting Information [Line Items]
Total revenues		53,225		46,000		101,574		88,350
Depreciation and amortization		(20,061)		(17,333)		(37,736)		(34,220)
Property operating expenses and real estate taxes		(14,932)		(14,205)		(29,572)		(27,862)
General and administrative expenses		0		0		0		0
Gain on disposition of properties		0		0		0		4,612
Operating income		18,232		14,462		34,266		30,880
Interest and other income		0		0		0		0
Realized and unrealized holding gains (losses) on investments and other		0		0		1,163		0
Equity in (losses) earnings of unconsolidated affiliates		788		669		2,405		(459)
Interest expense		(8,519)		(7,350)		(16,115)		(14,564)
Income tax provision		0		0		0		0
Net (loss) Income		10,501		7,781		21,719		15,857
Net (income) loss attributable to noncontrolling interests		(366)		(406)		(1,486)		(1,013)
Net income (loss) attributable to Acadia		10,135		7,375		20,233		14,844
Real estate at cost	[1]	2,606,083		2,323,767		2,606,083		2,323,767
Total assets	[1]	2,513,011		2,209,033		2,513,011		2,209,033
Cash paid for acquisition of real estate						242,633		0
Cash paid for development and property improvement costs						16,248		5,465
Operating Segments | Opportunity Funds
Segment Reporting Information [Line Items]
Total revenues		31,034		27,057		64,192		52,894
Depreciation and amortization		(14,910)		(13,207)		(30,948)		(26,960)
Property operating expenses and real estate taxes		(10,263)		(10,645)		(20,253)		(21,403)
General and administrative expenses		0		0		0		0
Gain on disposition of properties		12,216		5,909		41,031		5,909
Operating income		18,077		9,114		54,022		10,440
Interest and other income		0		0		0		0
Realized and unrealized holding gains (losses) on investments and other		(26,383)		2,841		(11,816)		9,388
Equity in (losses) earnings of unconsolidated affiliates		492		230		2,005		3,240
Interest expense		(10,703)		(9,724)		(21,032)		(19,124)
Income tax provision		0		0		0		0
Net (loss) Income		(18,517)		2,461		23,179		3,944
Net (income) loss attributable to noncontrolling interests		15,817		3,665		(10,322)		8,392
Net income (loss) attributable to Acadia		(2,700)		6,126		12,857		12,336
Real estate at cost	[1]	1,729,074		1,649,667		1,729,074		1,649,667
Total assets	[1]	1,788,567		1,705,799		1,788,567		1,705,799
Cash paid for acquisition of real estate						0		0
Cash paid for development and property improvement costs						9,033		10,275
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 and real estate taxes		0		0		0		0
General and administrative expenses		0		0		0		0
Gain on disposition of properties		0		0		0		0
Operating income		0		0		0		0
Interest and other income		2,961		2,054		5,896		3,754
Realized and unrealized holding gains (losses) on investments and other		100		(999)		100		(2,421)
Equity in (losses) earnings of unconsolidated affiliates		0		0		0		0
Interest expense		0		0		0		0
Income tax provision		0		0		0		0
Net (loss) Income		3,061		1,055		5,996		1,333
Net (income) loss attributable to noncontrolling interests		0		0		0		0
Net income (loss) attributable to Acadia		3,061		1,055		5,996		1,333
Real estate at cost	[1]	0		0		0		0
Total assets	[1]	137,306		114,461		137,306		114,461
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 and real estate taxes		0		0		0		0
General and administrative expenses		(10,661)		(10,653)		(22,598)		(19,645)
Gain on disposition of properties		0		0		0		0
Operating income		(10,661)		(10,653)		(22,598)		(19,645)
Interest and other income		0		0		0		0
Realized and unrealized holding gains (losses) on investments and other		0		0		0		0
Equity in (losses) earnings of unconsolidated affiliates		0		0		0		0
Interest expense		0		0		0		0
Income tax provision		(209)		(192)		(24)		(340)
Net (loss) Income		(10,870)		(10,845)		(22,622)		(19,985)
Net (income) loss attributable to noncontrolling interests		0		0		0		0
Net income (loss) attributable to Acadia		(10,870)		(10,845)		(22,622)		(19,985)
Real estate at cost	[1]	0		0		0		0
Total assets	[1]	$ 0		$ 0		0		0
Cash paid for acquisition of real estate						0		0
Cash paid for development and property improvement costs						$ 0		$ 0

[1] Real estate at cost and total assets for the Funds segment include $660.0 million and $650.6 million, or $270.7 million and $189.0 million net of non-controlling interests, related to Fund II’s City Point property at June 30, 2022 and 2021, respectively.