Estimated Cost of Providing Uncompensated Care (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Health Care Trust Fund [Line Items]
Estimated cost of providing uncompensated care	$ 253,014	$ 234,001	$ 239,620
Charity Care
Health Care Trust Fund [Line Items]
Estimated cost of providing uncompensated care	77,886	94,088	120,208
Uninsured Discounts
Health Care Trust Fund [Line Items]
Estimated cost of providing uncompensated care	$ 175,128	$ 139,913	$ 119,412