Earnings Per Common Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income (loss) attributable to Acadia	$ 16,838	$ 4,817
Less: net income attributable to participating securities	(204)	(156)
Income (loss) from continuing operations net of income attributable to participating securities	$ 16,634	$ 4,661
Denominator:
Weighted average shares for basic earnings per share (in shares)	93,285,565	86,323,267
Effect of dilutive securities:
Series A Preferred OP Units	25,067
Employee unvested restricted shares (in shares)	24,468	23,093
Denominator for diluted earnings per share (in shares)	93,335,100	86,346,360
Basic and diluted earnings and basic loss per Common Share from continuing operations attributable to Acadia	$ 0.18	$ 0.05
Series A Preferred OP Units
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	0	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)	0	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
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