Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue before provision for doubtful accounts	$ 689,341	$ 627,183
Provision for doubtful accounts	(10,147)	(10,370)
Revenue	679,194	616,813
Salaries, wages and benefits (including equity-based compensation expense of $7,396 and $6,956, respectively)	376,421	341,028
Professional fees	43,409	39,991
Supplies	27,709	26,685
Rents and leases	18,971	14,806
Other operating expenses	83,711	70,247
Depreciation and amortization	33,613	27,975
Interest expense, net	42,757	37,714
Gain on foreign currency derivatives		(410)
Transaction-related expenses	4,119	26,298
Total expenses	630,710	584,334
Income before income taxes	48,484	32,479
Provision for income taxes	13,711	7,110
Net income	34,773	25,369
Net loss attributable to noncontrolling interests	185	319
Net income attributable to Acadia Healthcare Company, Inc.	$ 34,958	$ 25,688
Earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Basic	$ 0.40	$ 0.31
Diluted	$ 0.40	$ 0.31
Weighted-average shares outstanding:
Basic	86,762	82,943
Diluted	86,908	83,420