Accounts Receivable and Net Revenue - Schedule of Net Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Abstract]
Net revenue	$ 495,101	$ 491,008
Net patient service revenue [Member]
Disaggregation of Revenue [Abstract]
Net revenue	421,831	423,184
Hospital contract administrative fees [Member]
Disaggregation of Revenue [Abstract]
Net revenue	71,803	65,989
Other revenue [Member]
Disaggregation of Revenue [Abstract]
Net revenue	$ 1,467	$ 1,835