Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 616,653	$ 551,199
Salaries, wages and benefits (including equity-based compensation expense of $7,925 and $7,034, respectively)	335,762	304,333
Professional fees	36,911	31,617
Supplies	23,699	21,322
Rents and leases	11,249	9,412
Other operating expenses	81,425	72,010
Depreciation and amortization	28,926	24,894
Interest expense, net	15,787	29,027
Debt extinguishment costs		24,650
Transaction-related expenses	3,582	4,610
Total expenses	537,341	521,875
Income from continuing operations before income taxes	79,312	29,324
Provision for income taxes	17,402	6,204
Income from continuing operations	61,910	23,120
Loss from discontinued operations, net of taxes		(12,641)
Net income	61,910	10,479
Net income attributable to noncontrolling interests	(1,073)	(762)
Net income attributable to Acadia Healthcare Company, Inc.	$ 60,837	$ 9,717
Basic earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Income from continuing operations attributable to Acadia Healthcare Company, Inc.	$ 0.68	$ 0.25
Loss from discontinued operations		(0.14)
Net income attributable to Acadia Healthcare Company, Inc.	0.68	0.11
Diluted earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Income from continuing operations attributable to Acadia Healthcare Company, Inc.	0.67	0.25
Loss from discontinued operations		(0.14)
Net income attributable to Acadia Healthcare Company, Inc.	$ 0.67	$ 0.11
Weighted-average shares outstanding:
Basic	89,258	88,242
Diluted	91,012	89,941