Segment Reporting - Summary of Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2025		Jun. 30, 2024		Jun. 30, 2025		Jun. 30, 2024		Dec. 31, 2024	[2]
Segment Reporting Information [Line Items]
Revenues		$ 100,592		$ 87,254		$ 204,986		$ 178,610
Depreciation and amortization expenses		(39,269)		(34,281)		(78,709)		(69,221)
Property operating expenses		(17,524)		(15,781)		(35,804)		(34,877)
Real estate taxes		(13,317)		(9,981)		(26,620)		(22,327)
General and administrative expenses		(11,532)		(10,179)		(23,129)		(19,947)
(Loss) gain related to a previously disposed property		0		757		0		(441)
Impairment charges		(18,190)		0		(24,640)		0
Operating income		760		17,789		16,084		31,797
Interest income		6,358		5,413		12,454		10,651
Equity in earnings of unconsolidated affiliates		(4,191)		4,480		(5,904)		4,168
Interest expense		(23,604)		(23,581)		(46,851)		(47,290)
Loss on change in control		0		0		(9,622)		0
Realized and unrealized holding (losses) gains on investments and other		(54)		(2,364)		1,567		(4,415)
Income tax provision		(211)		(155)		(327)		(186)
Net (loss) income		(20,942)		1,582		(32,599)		(5,275)
Net loss attributable to redeemable noncontrolling interests		1,724		2,292		3,393		4,846
Net (income) loss attributable to noncontrolling interests		21,181		(2,431)		32,777		5,141
Net income attributable to Acadia shareholders		1,963		1,443		3,571		4,712
Real estate at cost	[1]	5,096,641		4,420,708		5,096,641		4,420,708
Total assets		4,875,569	[1],[2]	4,251,038	[1]	4,875,569	[1],[2]	4,251,038	[1]	$ 4,371,203
Cash paid for acquisition of real estate						344,647		0
Cash paid for development and property improvement costs						47,528		37,412
Rental Income
Segment Reporting Information [Line Items]
Revenues		98,297		85,626		200,937		171,663
Other
Segment Reporting Information [Line Items]
Revenues		2,295		1,628		4,049		6,947
Operating Segments | Core Portfolio
Segment Reporting Information [Line Items]
Depreciation and amortization expenses		(22,446)		(17,966)		(46,129)		(36,232)
Property operating expenses		(8,639)		(7,696)		(18,192)		(17,428)
Real estate taxes		(8,780)		(6,683)		(17,738)		(14,870)
General and administrative expenses		0		0		0		0
(Loss) gain related to a previously disposed property				(2,213)				2,213
Impairment charges		0				0
Operating income		18,438		14,337		40,701		31,690
Interest income		0		0		0		0
Equity in earnings of unconsolidated affiliates		(522)		640		(209)		2,747
Interest expense		(9,555)		(9,940)		(18,934)		(19,977)
Loss on change in control						(9,622)
Realized and unrealized holding (losses) gains on investments and other		(411)		(2,155)		1,374		(4,018)
Income tax provision		0		0		0		0
Net (loss) income		7,950		2,882		13,310		10,442
Net loss attributable to redeemable noncontrolling interests		0		0		0		0
Net (income) loss attributable to noncontrolling interests		136		(194)		345		(563)
Net income attributable to Acadia shareholders		8,086		2,688		13,655		9,879
Real estate at cost	[1]	3,281,496		2,616,224		3,281,496		2,616,224
Total assets	[1]	3,112,930		2,543,067		3,112,930		2,543,067
Cash paid for acquisition of real estate						276,852
Cash paid for development and property improvement costs						42,030		29,023
Operating Segments | Core Portfolio | Rental Income
Segment Reporting Information [Line Items]
Revenues		57,699		47,787		121,473		96,570
Operating Segments | Core Portfolio | Other
Segment Reporting Information [Line Items]
Revenues		604		1,108		1,287		5,863
Operating Segments | Investment Management
Segment Reporting Information [Line Items]
Depreciation and amortization expenses		(16,823)		(16,315)		(32,580)		(32,989)
Property operating expenses		(8,885)		(8,085)		(17,612)		(17,449)
Real estate taxes		(4,537)		(3,298)		(8,882)		(7,457)
General and administrative expenses		0		0		0		0
(Loss) gain related to a previously disposed property				2,970				(1,772)
Impairment charges		(18,190)				(24,640)
Operating income		(6,146)		13,631		(1,488)		20,054
Interest income		0		0		0		0
Equity in earnings of unconsolidated affiliates		(3,669)		3,840		(5,695)		(1,421)
Interest expense		(14,049)		(13,641)		(27,917)		(27,313)
Loss on change in control						0
Realized and unrealized holding (losses) gains on investments and other		0		0		0		0
Income tax provision		0		0		0		0
Net (loss) income		(23,864)		3,830		(35,100)		(5,838)
Net loss attributable to redeemable noncontrolling interests		1,724		2,292		3,393		4,846
Net (income) loss attributable to noncontrolling interests		21,045		(2,237)		32,432		5,704
Net income attributable to Acadia shareholders		(1,095)		3,885		725		4,712
Real estate at cost	[1]	1,815,145		1,804,484		1,815,145		1,804,484
Total assets	[1]	1,607,957		1,581,318		1,607,957		1,581,318
Cash paid for acquisition of real estate						67,795
Cash paid for development and property improvement costs						5,498		8,389
Operating Segments | Investment Management | Rental Income
Segment Reporting Information [Line Items]
Revenues		40,598		37,839		79,464		75,093
Operating Segments | Investment Management | Other
Segment Reporting Information [Line Items]
Revenues		1,691		520		2,762		1,084
Operating Segments | Structured Financing
Segment Reporting Information [Line Items]
Depreciation and amortization expenses		0		0		0		0
Property operating expenses		0		0		0		0
Real estate taxes		0		0		0		0
General and administrative expenses		0		0		0		0
(Loss) gain related to a previously disposed property				0				0
Impairment charges		0				0
Operating income		0		0		0		0
Interest income		6,358		5,413		12,454		10,651
Equity in earnings of unconsolidated affiliates		0		0		0		0
Interest expense		0		0		0		0
Loss on change in control						0
Realized and unrealized holding (losses) gains on investments and other		357		(209)		193		(397)
Income tax provision		0		0		0		0
Net (loss) income		6,715		5,204		12,647		10,254
Net loss attributable to redeemable noncontrolling interests		0		0		0		0
Net (income) loss attributable to noncontrolling interests		0		0		0		0
Net income attributable to Acadia shareholders		6,715		5,204		12,647		10,254
Real estate at cost	[1]	0		0		0		0
Total assets	[1]	154,682		126,653		154,682		126,653
Cash paid for acquisition of real estate						0
Cash paid for development and property improvement costs						0		0
Operating Segments | Structured Financing | Rental Income
Segment Reporting Information [Line Items]
Revenues		0		0		0		0
Operating Segments | Structured Financing | Other
Segment Reporting Information [Line Items]
Revenues		0		0		0		0
Unallocated
Segment Reporting Information [Line Items]
Depreciation and amortization expenses		0		0		0		0
Property operating expenses		0		0		0		0
Real estate taxes		0		0		0		0
General and administrative expenses		(11,532)		(10,179)		(23,129)		(19,947)
(Loss) gain related to a previously disposed property				0				0
Impairment charges		0				0
Operating income		(11,532)		(10,179)		(23,129)		(19,947)
Interest income		0		0		0		0
Equity in earnings of unconsolidated affiliates		0		0		0		0
Interest expense		0		0		0		0
Loss on change in control						0
Realized and unrealized holding (losses) gains on investments and other		0		0		0		0
Income tax provision		(211)		(155)		(327)		(186)
Net (loss) income		(11,743)		(10,334)		(23,456)		(20,133)
Net loss attributable to redeemable noncontrolling interests		0		0		0		0
Net (income) loss attributable to noncontrolling interests		0		0		0		0
Net income attributable to Acadia shareholders		(11,743)		(10,334)		(23,456)		(20,133)
Real estate at cost	[1]	0		0		0		0
Total assets	[1]	0		0		0		0
Cash paid for acquisition of real estate						0
Cash paid for development and property improvement costs						0		0
Unallocated | Rental Income
Segment Reporting Information [Line Items]
Revenues		0		0		0		0
Unallocated | Other
Segment Reporting Information [Line Items]
Revenues		$ 0		$ 0		$ 0		$ 0

[1] Total assets for the Investment Management segment include $533.7 million and $549.3 million related to Fund II’s City Point property as of June 30, 2025 and 2024, respectively.

[2] Represents the consolidated assets and liabilities of Acadia Realty Limited Partnership (the “Operating Partnership”), which is a consolidated variable interest entity (“VIE”) (Note 15). The Condensed Consolidated Balance Sheets include the following amounts related to our consolidated VIEs that are consolidated by the Operating Partnership: $1,828.6 million and $1,640.1 million of Operating real estate, net; $33.2 million and $31.5 million of Real estate under development; $64.4 million and $74.4 million of Investments in and advances to unconsolidated affiliates; $88.6 million and $79.4 million of Other assets, net; $1.8 million and $2.0 million of Right-of-use assets - operating leases, net; $28.2 million and $15.9 million of Cash and cash equivalents; $13.8 million and $11.0 million of Restricted cash; $28.0 million and $27.3 million of Rents receivable, net; $904.5 million and $799.7 million of Mortgage and other notes payable, net; $130.0 million and $120.1 million of Accounts payable and other liabilities; $1.8 million and $2.1 million of Lease liability- operating leases as of June 30, 2025 and December 31, 2024, respectively.