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Description of Business and Basis of Presentation - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) Facility Bed State | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Accounting Policies [Abstract] |  |  |
Number of facilities | Facility | 585 |  |
Number of beds | Bed | 18,200 |  |
Number of operating states | State | 40 |  |
General and administrative expenses | $ | $ 90.4 | $ 86.6 | $ 76.4

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- Definition The number of facilities the entity operates as of the balance sheet date. + References No definition available. + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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