Quarterly Information (Unaudited) - Summary of Unaudited Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 58,282	$ 57,372	$ 53,784	$ 42,823	$ 37,166	$ 36,599	$ 29,120	$ 30,083	$ 212,261	$ 132,968	$ 115,741
Net income	(638)	1,744	5,116	2,119	3,273	2,025	227	841	8,341	6,366	1,492
Net income available to AAC Holdings, Inc. common stockholders	$ 448	$ 2,452	$ 5,555	$ 2,038	$ 3,109	$ 2,213	$ 514	$ 1,019	$ 10,493	$ 6,855	$ 1,786
Basic earnings per common share	$ 0.02	$ 0.11	$ 0.26	$ 0.10	$ 0.15	$ 0.14	$ 0.03	$ 0.07	$ 0.49	$ 0.41	$ 0.13
Diluted earnings per common share	$ 0.02	$ 0.11	$ 0.26	$ 0.10	$ 0.15	$ 0.14	$ 0.03	$ 0.07	$ 0.48	$ 0.41	$ 0.12