Segment Reporting - Summary of Segment Information (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Segment Reporting Information [Line Items]
Net income (loss) attributable to Acadia	$ 23,548,000		$ (8,976,000)		$ 53,717,000
Real estate at cost	4,071,607,000	[1]	4,011,326,000	[1]	3,960,411,000
Total Assets	4,261,746,000	[1]	4,131,069,000	[1]	4,251,695,000
Net (income) loss attributable to noncontrolling interests	2,482,000		(56,742,000)		(30,483,000)
Funds | Fund II's City Point Property
Segment Reporting Information [Line Items]
Real estate at cost	657,000.0
Total Assets	641,700
Net (income) loss attributable to noncontrolling interests	190,900		186,500
Operating Segments | Core Portfolio
Segment Reporting Information [Line Items]
Net income (loss) attributable to Acadia	28,507,000		5,314,000		62,477,000
Real estate at cost	2,356,645,000	[1]	2,330,116,000	[1]	2,252,230,000
Total Assets	2,212,877,000	[1]	2,254,680,000	[1]	2,350,833,000
Net (income) loss attributable to noncontrolling interests	2,276,000		5,837,000		(337,000)
Operating Segments | Funds
Segment Reporting Information [Line Items]
Net income (loss) attributable to Acadia	30,728,000		13,366,000		19,016,000
Real estate at cost	1,714,962,000	[1]	1,681,210,000	[1]	1,708,181,000
Total Assets	1,894,983,000	[1]	1,775,507,000	[1]	1,785,919,000
Net (income) loss attributable to noncontrolling interests	$ 206,000		$ (62,579,000)		$ (30,146,000)

[1] Real estate at cost and total assets for the Funds segment include $657.0 million and $641.7 million, or $190.9 million and $186.5 million net of non-controlling interests, related to Fund II’s City Point property at December 31, 2021 and 2020, respectively.