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Revenue - Additional Information (Detail) - Medicare [Member] - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2020 | Jun. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |  |
Repayments of medicare advance payments |  | $ 7.0 | $ 15.0 |
CARES Act [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Repayment of advanced payments |  |  |  | $ 25.0
CARES Act [Member] | CMS' Accelerated and Advance Payment Program [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Amount of advance payment received | $ 45.0 |  |  |
Repayment of advanced payments description | In April 2020, the Company received approximately $45 million from CMS’ Accelerated and Advance Payment Program for Medicare providers. Of the $45 million of advance payments received in 2020, the Company repaid approximately $25 million of advance payments during 2021 and made additional repayments of approximately $7 million and $15 million during the three and six month periods ended June 30, 2022, respectively. The Company will continue to repay the remaining balance throughout the rest of 2022. |  |  |
Repayment of advanced payments period | 2020 |  |  |
Repayment of advanced payments |  |  | 25.0 | 45.0
Repayments of medicare advance payments |  | 7.0 | 15.0 |
CARES Act [Member] | CMS' Accelerated and Advance Payment Program [Member] | Other Accrued Liabilities [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract liabilities |  | $ 20.2 | $ 20.2 | $ 30.4

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