Segment Reporting - Summary of Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2022		Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021	Dec. 31, 2021	[2]
Segment Reporting Information [Line Items]
Total revenues		$ 79,946		$ 71,896	$ 245,712		$ 213,140
Depreciation and amortization		(33,744)		(30,064)	(102,428)		(91,244)
Property operating expenses and real estate taxes		(25,559)		(23,471)	(75,384)		(72,736)
General and administrative expenses		(10,170)		(9,910)	(32,768)		(29,555)
Impairment charges		(33,311)		(9,925)	(33,311)		(9,925)
Gain on disposition of properties		8,885		0	49,916		10,521
Operating (loss) income		(13,953)		(1,474)	51,737		20,201
Interest and other income		3,994		2,354	9,890		6,108
Realized and unrealized holding losses on investments and other		(7,862)		46,493	(18,415)		53,460
Equity in (losses) earnings of unconsolidated affiliates		(50,579)		372	(46,169)		3,153
Interest expense		(21,162)		(16,614)	(58,309)		(50,302)
Income tax benefit (provision)		17		(59)	(7)		(399)
Net (loss) income		(89,545)		31,072	(61,273)		32,221
Net loss attributable to redeemable noncontrolling interests		3,193		0	3,193		0
Net loss (income) attributable to noncontrolling interests		30,461		(19,065)	18,653		(11,686)
Net loss attributable to Acadia		(55,891)		12,007	(39,427)		20,535
Real estate at cost	[1]	4,265,422		4,065,994	4,265,422		4,065,994
Total assets		4,363,498	[1],[2]	4,184,285	4,363,498	[1],[2]	4,184,285	$ 4,261,746
Cash paid for acquisition of real estate					242,633		63,425
Cash paid for development and property improvement costs					36,863		25,935
Operating Segments | Core Portfolio
Segment Reporting Information [Line Items]
Total revenues		50,076		45,942	151,650		134,292
Depreciation and amortization		(18,811)		(17,678)	(56,547)		(51,898)
Property operating expenses and real estate taxes		(14,808)		(13,911)	(44,379)		(41,773)
General and administrative expenses		0		0	0		0
Impairment charges		0		0	0		0
Gain on disposition of properties		0			0		4,612
Operating (loss) income		16,457		14,353	50,724		45,233
Interest and other income		0		0	0		0
Realized and unrealized holding losses on investments and other		0		0	1,163		0
Equity in (losses) earnings of unconsolidated affiliates		(49,806)		(485)	(47,402)		(944)
Interest expense		(10,428)		(7,322)	(26,543)		(21,863)
Income tax benefit (provision)		0		0	0		0
Net (loss) income		(43,777)		6,546	(22,058)		22,426
Net loss attributable to redeemable noncontrolling interests		0			0
Net loss (income) attributable to noncontrolling interests		2,884		(912)	(1,398)		(1,926)
Net loss attributable to Acadia		(40,893)		5,634	(20,660)		20,500
Real estate at cost	[1]	2,614,103		2,328,208	2,614,103		2,328,208
Total assets		2,636,041	[1]	2,201,871	2,636,041	[1]	2,201,871
Cash paid for acquisition of real estate					242,633		0
Cash paid for development and property improvement costs					22,325		11,601
Operating Segments | Opportunity Funds
Segment Reporting Information [Line Items]
Total revenues		29,870		25,954	94,062		78,848
Depreciation and amortization		(14,933)		(12,386)	(45,881)		(39,346)
Property operating expenses and real estate taxes		(10,751)		(9,560)	(31,005)		(30,963)
General and administrative expenses		0		0	0		0
Impairment charges		(33,311)		(9,925)	(33,311)		(9,925)
Gain on disposition of properties		8,885			49,916		5,909
Operating (loss) income		(20,240)		(5,917)	33,781		4,523
Interest and other income		0		0	0		0
Realized and unrealized holding losses on investments and other		(7,257)		47,643	(19,073)		57,031
Equity in (losses) earnings of unconsolidated affiliates		(773)		857	1,233		4,097
Interest expense		(10,734)		(9,292)	(31,766)		(28,439)
Income tax benefit (provision)		0		0	0		0
Net (loss) income		(39,004)		33,291	(15,825)		37,212
Net loss attributable to redeemable noncontrolling interests		3,193			3,193
Net loss (income) attributable to noncontrolling interests		27,577		(18,153)	(17,255)		(9,760)
Net loss attributable to Acadia		(8,234)		15,138	4,623		27,452
Real estate at cost	[1]	1,651,319		1,737,786	1,651,319		1,737,786
Total assets		1,603,491	[1]	1,827,565	1,603,491	[1]	1,827,565
Cash paid for acquisition of real estate					0		63,425
Cash paid for development and property improvement costs					14,538		14,334
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
Impairment charges		0		0	0		0
Gain on disposition of properties		0			0		0
Operating (loss) income		0		0	0		0
Interest and other income		3,994		2,354	9,890		6,108
Realized and unrealized holding losses on investments and other		(605)		(1,150)	(505)		(3,571)
Equity in (losses) earnings of unconsolidated affiliates		0		0	0		0
Interest expense		0		0	0		0
Income tax benefit (provision)		0		0	0		0
Net (loss) income		3,389		1,204	9,385		2,537
Net loss attributable to redeemable noncontrolling interests		0			0
Net loss (income) attributable to noncontrolling interests		0		0	0		0
Net loss attributable to Acadia		3,389		1,204	9,385		2,537
Real estate at cost	[1]	0		0	0		0
Total assets		123,966	[1]	154,849	123,966	[1]	154,849
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		(10,170)		(9,910)	(32,768)		(29,555)
Impairment charges		0		0	0		0
Gain on disposition of properties		0			0		0
Operating (loss) income		(10,170)		(9,910)	(32,768)		(29,555)
Interest and other income		0		0	0		0
Realized and unrealized holding 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 benefit (provision)		17		(59)	(7)		(399)
Net (loss) income		(10,153)		(9,969)	(32,775)		(29,954)
Net loss attributable to redeemable noncontrolling interests		0			0
Net loss (income) attributable to noncontrolling interests		0		0	0		0
Net loss attributable to Acadia		(10,153)		(9,969)	(32,775)		(29,954)
Real estate at cost	[1]	0		$ 0	0		0
Total assets	[1]	$ 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 $661.7 million and $654.0 million, or $418.5 million and $190.0 million net of non-controlling interests, related to Fund II’s City Point property at September 30, 2022 and 2021, respectively.

[2] Represents the consolidated assets and liabilities of Acadia Realty Limited Partnership (the "Operating Partnership"), which is a consolidated variable interest entity ("VIE"). As of September 30, 2022, the assets and liabilities of the Operating Partnership includes $2.0 billion and $0.9 billion of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. As of December 31, 2021, the assets and liabilities of the Operating Partnership includes $2.0 billion and $1.2 billion of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership (Note 1).