Accounts Receivable and Net Revenue - Schedule of Net Patient Service Revenue by Type of Payor (Detail)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Percentage of net patient service revenue	100.00%	100.00%
Contracted Managed Care [Member]
Disaggregation of Revenue [Line Items]
Percentage of net patient service revenue	70.00%	70.00%
Government [Member]
Disaggregation of Revenue [Line Items]
Percentage of net patient service revenue	24.00%	24.00%
Other Third-Parties [Member]
Disaggregation of Revenue [Line Items]
Percentage of net patient service revenue	5.00%	4.00%
Private-Pay Patients [Member]
Disaggregation of Revenue [Line Items]
Percentage of net patient service revenue	1.00%	2.00%