Accounts Receivable and Net Revenue - Schedule of Net Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Abstract]
Net revenue	$ 1,994,640	$ 1,972,021	$ 1,911,191
Net patient service revenue [Member]
Disaggregation of Revenue [Abstract]
Net revenue	1,716,368	1,688,818	1,641,323
Hospital contract administrative fees [Member]
Disaggregation of Revenue [Abstract]
Net revenue	275,677	262,931	240,022
Other revenue [Member]
Disaggregation of Revenue [Abstract]
Net revenue	$ 2,595	$ 20,272	$ 29,846