Earnings Per Share - Summary of Elements Used in Calculating Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator – basic and diluted earnings per share:
Net income (loss)	$ 82,061	$ 31,368
Net income attributable to noncontrolling interests – partially owned properties	(1,206)	(1,728)
Net income (loss) attributable to ACC, Inc. and Subsidiaries common stockholders	80,855	29,640
Amount allocated to participating securities	(662)	(573)
Net income (loss) attributable to common unitholders	$ 80,193	$ 29,067
Denominator:
Basic weighted average common shares outstanding (in shares)	137,477,169	137,101,535
Diluted weighted average common shares outstanding (in shares)	138,587,513	138,152,378
Earnings per share:
Net income attributable to common stockholders - basic and diluted (in dollars per share)	$ 0.58	$ 0.21
Unvested restricted stock awards
Denominator:
Unvested restricted stock awards (in shares)	1,110,344	1,050,843