Accounts Receivable and Net Revenue - Schedule of Net Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Abstract]
Net revenue	$ 504,296	$ 500,577	$ 999,397	$ 991,585
Net patient service revenue
Disaggregation of Revenue [Abstract]
Net revenue	432,847	430,383	854,678	853,567
Hospital contract administrative fees
Disaggregation of Revenue [Abstract]
Net revenue	70,913	69,585	142,716	135,574
Other revenue
Disaggregation of Revenue [Abstract]
Net revenue	$ 536	$ 609	$ 2,003	$ 2,444