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Revenue - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Reductions to accounts receivable | $ (19,060,000) | $ (16,821,000) | $ (28,570,000)
Cost report receivables | 13,723,000 | 10,340,000 |
Net adjustments to estimated cost report settlements resulted in (decreases) increases to revenue | (400,000) | 500,000 | 200,000
Costs of providing charity care services | 4,300,000 | 4,700,000 | $ 5,300,000
Accounting Standards Update 2014-09 [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Cumulative-effect adjustment in retained earnings | 0 |  |
Reductions to accounts receivable | $ 47,400,000 | $ 47,000,000.0 |

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