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Dispositions and Acquisitions - Additional Information (Detail) - USD ($) | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019
Business Acquisition [Line Items] |  |
Acquisition, cash paid |  | $ 0
Aggregate cash proceeds from divestiture of businesses | $ 8,000,000 |
Behavioral Health Care Facility |  |
Business Acquisition [Line Items] |  |
Aggregate cash proceeds from divestiture of businesses |  | $ 7,000,000
Real Estate and Other Assets | Nevada |  |
Business Acquisition [Line Items] |  |
Acquisition, cash paid | $ 52,000,000 |

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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