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Estimated Cost of Providing Uncompensated Care (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Health Care Trust Fund [Line Items]      
Estimated cost of providing uncompensated care $ 260,494 $ 253,014 $ 234,001
Charity Care      
Health Care Trust Fund [Line Items]      
Estimated cost of providing uncompensated care 73,690 77,886 94,088
Uninsured Discounts      
Health Care Trust Fund [Line Items]      
Estimated cost of providing uncompensated care $ 186,804 $ 175,128 $ 139,913