Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Other revenue	$ 119,377	$ 106,581	$ 93,061
Other revenue, percentage of revenue	0.019	0.018	0.017
Revenue	$ 6,324,339	$ 5,966,072	$ 5,409,483
Percentage of revenue	1.000	1.000	1.000
Third-Party Payor | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Net patient service revenue	$ 6,204,962	$ 5,859,491	$ 5,316,422
Third party payers, percentage of revenue	98.10%	98.20%	98.30%
Medicare | Third-Party Payor | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Net patient service revenue	$ 2,439,774	$ 2,334,071	$ 2,136,695
Third party payers, percentage of revenue	38.60%	39.20%	39.50%
Medicaid | Third-Party Payor | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Net patient service revenue	$ 604,767	$ 612,889	$ 606,770
Third party payers, percentage of revenue	9.60%	10.30%	11.20%
Other managed care | Third-Party Payor | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Net patient service revenue	$ 2,800,359	$ 2,599,858	$ 2,304,718
Third party payers, percentage of revenue	44.30%	43.50%	42.60%
Self-pay and other | Third-Party Payor | Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Net patient service revenue	$ 360,062	$ 312,673	$ 268,239
Third party payers, percentage of revenue	5.60%	5.20%	5.00%