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Revenue - Schedule of U.S. Revenue Attributed to Each Category (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 777,251 | $ 760,916 | $ 2,327,230 | $ 2,268,895
U.S. Facilities [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 509,383 | 488,626 | 1,507,156 | 1,432,501
U.S. Facilities [Member] | Acute Inpatient Psychiatric Facilities [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 233,141 | 208,885 | 678,866 | 608,311
U.S. Facilities [Member] | Specialty Treatment Facilities [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 201,169 | 198,107 | 595,473 | 575,536
U.S. Facilities [Member] | Residential Treatment Centers [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 69,681 | 72,351 | 216,989 | 218,041
U.S. Facilities [Member] | Outpatient Community-Based Facilities [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 5,392 | $ 9,283 | $ 15,828 | $ 30,613

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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