Segment Reporting - Summary of Segment Information (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net income attributable to Acadia	$ (8,414)	$ 12,197
Real estate at cost	4,082,116	3,755,591
Total assets	4,305,138	4,044,041	$ 4,309,114
Net (income) loss attributable to noncontrolling interests	(51,625)	(9,261)
Opportunity Funds \| Fund II's City Point Property
Segment Reporting Information [Line Items]
Real estate at cost	603,400
Total assets	603,300
Net (income) loss attributable to noncontrolling interests	175,600		$ 174,700
Operating Segments \| Core Portfolio
Segment Reporting Information [Line Items]
Net income attributable to Acadia	5,671	14,548
Real estate at cost	2,289,449	2,114,727
Total assets	2,330,971	2,244,349
Net (income) loss attributable to noncontrolling interests	(1,216)	41
Operating Segments \| Core Portfolio \| Town Center
Segment Reporting Information [Line Items]
Net income attributable to Acadia	1,000	1,200
Operating Segments \| Opportunity Funds
Segment Reporting Information [Line Items]
Net income attributable to Acadia	(8,366)	3,656
Real estate at cost	1,792,667	1,640,864
Total assets	1,801,008	1,684,757
Net (income) loss attributable to noncontrolling interests	$ (50,409)	$ (9,302)

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