Business Overview	9 Months Ended
Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview	1. Business Overview Civitas Solutions, Inc. ("Civitas"), through its wholly-owned subsidiaries (collectively, the "Company"), is the leading provider of home- and community-based health and human services to must-serve individuals with a range of intellectual, developmental, behavioral and/or medically complex disabilities and challenges. Since the Company’s founding in 1980, the Company has evolved into a diversified national network providing an array of high-quality services and care in large, growing and highly-fragmented markets. The Company currently provides services to individuals with intellectual and/or developmental disabilities (“I/DD”), individuals with catastrophic injuries and illnesses, particularly acquired brain injury (“ABI”), youth with emotional, behavioral and/or medically complex challenges, or at-risk youth (“ARY”), and elders in need of day health services to support their independence, or adult day health (“ADH”). Since the Company’s founding in 1980, the Company’s operations have grown to 36 states. The Company provides residential services to approximately 11,800 clients and more than 18,600 clients receive periodic services from the Company in non-residential settings. The Company designs customized service plans to meet the individual needs of its clients, which it delivers in home- and community-based settings. Most of the Company’s service plans involve residential support, typically in small group homes, host home settings, or specialized community facilities, designed to improve an individual's quality of life and to promote independence and participation in community life. Other services offered include supported living, day and transitional programs, vocational services, case management, family-based and outpatient therapeutic services, post-acute treatment and neurorehabilitation, neurobehavioral rehabilitation and physical, occupational and speech therapies, among others. The Company’s customized service plans offer its clients as well as the payors of these services, an attractive, cost-effective alternative to health and human services provided in large, institutional settings. Civitas is the parent of a consolidated group of subsidiaries that market their services under The MENTOR Network tradename. Prior to October 1, 2015, Civitas was a wholly-owned subsidiary of NMH Investment, LLC (“NMH Investment”), which was formed in connection with the acquisition of our business by affiliates of Vestar Capital Partners (“Vestar”) in 2006. The equity interests of NMH Investment were owned by Vestar and certain executive officers, directors and other members of management. On October 1, 2015, in connection with an underwritten secondary offering, NMH Investment distributed all of the 25,250,000 shares of common stock of Civitas it held to its existing members in accordance with their respective membership interests. NMH Holdings, LLC ("NMHH") is a wholly-owned subsidiary of Civitas and National Mentor Holdings, Inc. (“NMHI”) is a wholly-owned subsidiary of NMHH. The financial results of Civitas are primarily composed of the financial results of NMHI and its subsidiaries on a consolidated basis.

1. Business Overview

Civitas Solutions, Inc. ("Civitas"), through its wholly-owned subsidiaries (collectively, the "Company"), is the leading provider of home- and community-based health and human services to must-serve individuals with a range of intellectual, developmental, behavioral and/or medically complex disabilities and challenges. Since the Company’s founding in 1980, the Company has evolved into a diversified national network providing an array of high-quality services and care in large, growing and highly-fragmented markets. The Company currently provides services to individuals with intellectual and/or developmental disabilities (“I/DD”), individuals with catastrophic injuries and illnesses, particularly acquired brain injury (“ABI”), youth with emotional, behavioral and/or medically complex challenges, or at-risk youth (“ARY”), and elders in need of day health services to support their independence, or adult day health (“ADH”). Since the Company’s founding in 1980, the Company’s operations have grown to 36 states. The Company provides residential services to approximately 11,800 clients and more than 18,600 clients receive periodic services from the Company in non-residential settings.

The Company designs customized service plans to meet the individual needs of its clients, which it delivers in home- and community-based settings. Most of the Company’s service plans involve residential support, typically in small group homes, host home settings, or specialized community facilities, designed to improve an individual's quality of life and to promote independence and participation in community life. Other services offered include supported living, day and transitional programs, vocational services, case management, family-based and outpatient therapeutic services, post-acute treatment and neurorehabilitation, neurobehavioral rehabilitation and physical, occupational and speech therapies, among others. The Company’s customized service plans offer its clients as well as the payors of these services, an attractive, cost-effective alternative to health and human services provided in large, institutional settings.

Civitas is the parent of a consolidated group of subsidiaries that market their services under The MENTOR Network tradename. Prior to October 1, 2015, Civitas was a wholly-owned subsidiary of NMH Investment, LLC (“NMH Investment”), which was formed in connection with the acquisition of our business by affiliates of Vestar Capital Partners (“Vestar”) in 2006. The equity interests of NMH Investment were owned by Vestar and certain executive officers, directors and other members of management. On October 1, 2015, in connection with an underwritten secondary offering, NMH Investment distributed all of the 25,250,000 shares of common stock of Civitas it held to its existing members in accordance with their respective membership interests. NMH Holdings, LLC ("NMHH") is a wholly-owned subsidiary of Civitas and National Mentor Holdings, Inc. (“NMHI”) is a wholly-owned subsidiary of NMHH. The financial results of Civitas are primarily composed of the financial results of NMHI and its subsidiaries on a consolidated basis.