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Property and Equipment - Additional information (Detail) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) Bed | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Property Plant And Equipment [Line Items] |  |  |  |
Loss on impairment | $ 1.1 | $ 23.2 | $ 24.3 | $ 4.2
Number of beds, replacement facility | Bed |  | 260 |  |
Other Assets [Member] |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Assets held for sale |  |  | $ 15.8 | $ 17.1

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