Uncompensated Care (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Health Care Trust Fund [Line Items]
Total uncompensated care	$ 2,184,064	$ 1,894,594	$ 1,768,401
Uncompensated care, percentage	100.00%	100.00%	100.00%
Charity Care
Health Care Trust Fund [Line Items]
Total uncompensated care	$ 672,326	$ 761,783	$ 887,136
Uncompensated care, percentage	31.00%	40.00%	50.00%
Uninsured Discounts
Health Care Trust Fund [Line Items]
Total uncompensated care	$ 1,511,738	$ 1,132,811	$ 881,265
Uncompensated care, percentage	69.00%	60.00%	50.00%