Accounts Receivable and Net Revenue - Schedule of Net Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Abstract]
Net revenue	$ 491,008	$ 482,229
Net patient service revenue [Member]
Disaggregation of Revenue [Abstract]
Net revenue	423,184	406,035
Hospital contract administrative fees [Member]
Disaggregation of Revenue [Abstract]
Net revenue	65,989	63,526
Other revenue [Member]
Disaggregation of Revenue [Abstract]
Net revenue	$ 1,835	$ 12,668