Description of Business and Basis of Presentation	12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	1. Description of Business and Basis of Presentation Description of Business Acadia Healthcare Company, Inc. (the “Company”) develops and operates inpatient psychiatric facilities, residential treatment centers, group homes, substance abuse facilities and facilities providing outpatient behavioral healthcare services to serve the behavioral health and recovery needs of communities in which the Company operates. At December 31, 2020, the Company operated 572 behavioral healthcare facilities with approximately 18,100 beds in 40 states, the United Kingdom (“U.K.”) and Puerto Rico. On January 19, 2021, the Company completed the sale of its U.K. operations to RemedcoUK Limited, a company organized under the laws of England and Wales and owned by funds managed or advised by Waterland Private Equity Fund VII (the “U.K. Sale”). The U.K. Sale allows us to reduce our indebtedness and focus on our United States (“U.S.”) operations. As a result of the U.K. Sale, the Company reported, for all periods presented, results of operations and cash flows of the U.K. operations as discontinued operations in the accompanying financial statements. See Note 3 – U.K. Sale. Basis of Presentation The business of the Company is conducted through limited liability companies, partnerships and C-corporations. The Company’s consolidated financial statements include the accounts of the Company and all subsidiaries controlled by the Company through its’ direct or indirect ownership of majority interests and exclusive rights granted to the Company as the controlling member of an entity. All intercompany accounts and transactions have been eliminated in consolidation. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. The majority of the Company’s expenses are “cost of revenue” items. Costs that could be classified as general and administrative expenses include the Company’s corporate office costs, which were $97.8 million, $90.4 million and $86.6 million for the years ended December 31, 2020, 2019 and 2018, respectively. Certain reclassifications have been made to prior years to conform to the current year presentation.

Description of Business and Basis of Presentation

12 Months Ended

Dec. 31, 2020

Description of Business and Basis of Presentation

1. Description of Business and Basis of Presentation

Description of Business

Acadia Healthcare Company, Inc. (the “Company”) develops and operates inpatient psychiatric facilities, residential treatment centers, group homes, substance abuse facilities and facilities providing outpatient behavioral healthcare services to serve the behavioral health and recovery needs of communities in which the Company operates. At December 31, 2020, the Company operated 572 behavioral healthcare facilities with approximately 18,100 beds in 40 states, the United Kingdom (“U.K.”) and Puerto Rico.

On January 19, 2021, the Company completed the sale of its U.K. operations to RemedcoUK Limited, a company organized under the laws of England and Wales and owned by funds managed or advised by Waterland Private Equity Fund VII (the “U.K. Sale”). The U.K. Sale allows us to reduce our indebtedness and focus on our United States (“U.S.”) operations. As a result of the U.K. Sale, the Company reported, for all periods presented, results of operations and cash flows of the U.K. operations as discontinued operations in the accompanying financial statements. See Note 3 – U.K. Sale.

Basis of Presentation

The business of the Company is conducted through limited liability companies, partnerships and C-corporations. The Company’s consolidated financial statements include the accounts of the Company and all subsidiaries controlled by the Company through its’ direct or indirect ownership of majority interests and exclusive rights granted to the Company as the controlling member of an entity. All intercompany accounts and transactions have been eliminated in consolidation.

The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. The majority of the Company’s expenses are “cost of revenue” items. Costs that could be classified as general and administrative expenses include the Company’s corporate office costs, which were $97.8 million, $90.4 million and $86.6 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Certain reclassifications have been made to prior years to conform to the current year presentation.