Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 1,624,856	$ 1,576,746	$ 4,848,971	$ 4,719,260
Uncollectible Receivables
Disaggregation of Revenue [Line Items]
Revenue		(42,600)
Health Care, Patient Service
Disaggregation of Revenue [Line Items]
Charity care program, costs	7,400	6,400	22,700	50,200
Health Care, Patient Service | Third-Party Payor
Disaggregation of Revenue [Line Items]
Revenue adjustment, net	15,600	$ 4,500	18,000	$ 13,700
Receivable (payable), net	13,300		13,300		$ (7,800)
Receivables, current	29,800		29,800		21,100
Payables, current	$ 16,500		$ 16,500		$ 28,900
Inpatient Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, expected timing of satisfaction	5 days		5 days
Outpatient Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, expected timing of satisfaction	1 day		1 day