Earnings Per Common Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net (loss) income attributable to Acadia	$ (374)	$ 3,711	$ 16,464	$ 8,528
Less: net income attributable to participating securities	0	(156)	(408)	(312)
(Loss) income from continuing operations net of income attributable to participating securities	$ (374)	$ 3,555	$ 16,056	$ 8,216
Denominator:
Weighted average shares for basic earnings per share (in shares)	94,944,772	86,824,445	94,119,752	86,575,240
Effect of dilutive securities:
Series A Preferred OP Units	0	0	0	0
Employee unvested restricted shares (in shares)	0	0	0	0
Denominator for diluted earnings per share (in shares)	94,944,772	86,824,445	94,119,752	86,575,240
Basic and diluted (loss) earnings per Common Share from continuing operations attributable to Acadia	$ 0.00	$ 0.04	$ 0.17	$ 0.09
Series A Preferred OP Units
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	188	188	188	188
Series A Preferred OP Units - Common Share Equivalent
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	25,067	25,067	25,067	25,067
Series C Preferred OP Units
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	126,593	126,593	126,593	126,593
Series C Preferred OP Units - Common Share Equivalent
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	439,556	439,556	439,556	439,556
Restricted shares
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	69,948	70,827	69,948	70,827