Earnings (Loss) Per Common Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net (loss) income attributable to Acadia	$ 23,548	$ (8,976)	$ 53,717
Less: net income attributable to participating securities	624	233	413
Income (loss) from continuing operations net of income attributable to participating securities	$ 22,924	$ (9,209)	$ 53,304
Denominator:
Weighted average shares for basic earnings (loss) per share	87,653,818	86,441,922	84,435,826
Effect of dilutive securities:
Employee unvested restricted shares (in shares)	0	0	0
Denominator for diluted earnings per share (in shares)	87,653,818	86,441,922	84,435,826
Basic income (loss) and diluted earnings per Common Share from continuing operations attributable to Acadia	$ 0.26	$ (0.11)	$ 0.63
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
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
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	136,593
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	474,278
Restricted shares
Anti-Dilutive Shares Excluded from Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	70,827	76,394	40,821