Estimated Cost of Providing Uncompensated Care (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Health Care Trust Funds [Line Items]
Estimated cost of providing uncompensated care	$ 217,633	$ 260,494	$ 253,014
Charity Care
Health Care Trust Funds [Line Items]
Estimated cost of providing uncompensated care	72,095	73,690	77,886
Uninsured Discounts
Health Care Trust Funds [Line Items]
Estimated cost of providing uncompensated care	$ 145,538	$ 186,804	$ 175,128