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Revenue Recognition and Accounts Receivable - Additional Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Accounts receivable | $ 1,957,583 | $ 1,824,282
Medicare bad debt claims |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Accounts receivable | 1,174,123 | $ 1,101,837
Accounts Receivable |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Accounts receivable | $ 0 |
Percentage Of Accounts Receivable Six Months Or More Past Due | 16.00% | 17.00%
Accounts Receivable Period Outstanding | 6 months |
Accounts Receivable, Noncurrent, Threshold Period Past Due | 1 year |
Customer Concentration Risk | Accounts Receivable | Third-Party Payor |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Number of concentration risk customers | 0 | 0
Concentration risk percentage | 10.00% | 10.00%

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