Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 5,452,830	$ 5,187,105	$ 4,825,977
Total patient services revenue
Disaggregation of Revenue [Line Items]
Total revenue	4,915,292	4,675,536	4,340,344
Medicare
Disaggregation of Revenue [Line Items]
Total revenue	1,561,949	1,491,836	1,485,009
Non-Medicare
Disaggregation of Revenue [Line Items]
Total revenue	3,353,343	3,183,700	2,855,335
Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	537,538	511,569	485,633
Operating Segments \| Critical Illness Recovery Hospital
Disaggregation of Revenue [Line Items]
Total revenue	2,477,814	2,444,196	2,299,773
Operating Segments \| Critical Illness Recovery Hospital \| Total patient services revenue
Disaggregation of Revenue [Line Items]
Total revenue	2,473,816	2,440,554	2,295,959
Operating Segments \| Critical Illness Recovery Hospital \| Medicare
Disaggregation of Revenue [Line Items]
Total revenue	788,431	798,439	840,187
Operating Segments \| Critical Illness Recovery Hospital \| Non-Medicare
Disaggregation of Revenue [Line Items]
Total revenue	1,685,385	1,642,115	1,455,772
Operating Segments \| Critical Illness Recovery Hospital \| Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	3,998	3,642	3,814
Operating Segments \| Rehabilitation Hospital
Disaggregation of Revenue [Line Items]
Total revenue	1,288,954	1,110,592	979,585
Operating Segments \| Rehabilitation Hospital \| Total patient services revenue
Disaggregation of Revenue [Line Items]
Total revenue	1,235,138	1,059,766	930,915
Operating Segments \| Rehabilitation Hospital \| Medicare
Disaggregation of Revenue [Line Items]
Total revenue	584,474	503,126	462,476
Operating Segments \| Rehabilitation Hospital \| Non-Medicare
Disaggregation of Revenue [Line Items]
Total revenue	650,664	556,640	468,439
Operating Segments \| Rehabilitation Hospital \| Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	53,816	50,826	48,670
Operating Segments \| Outpatient Rehabilitation
Disaggregation of Revenue [Line Items]
Total revenue	1,284,873	1,250,294	1,188,914
Operating Segments \| Outpatient Rehabilitation \| Total patient services revenue
Disaggregation of Revenue [Line Items]
Total revenue	1,206,338	1,175,216	1,113,470
Operating Segments \| Outpatient Rehabilitation \| Medicare
Disaggregation of Revenue [Line Items]
Total revenue	189,044	190,271	182,346
Operating Segments \| Outpatient Rehabilitation \| Non-Medicare
Disaggregation of Revenue [Line Items]
Total revenue	1,017,294	984,945	931,124
Operating Segments \| Outpatient Rehabilitation \| Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	78,535	75,078	75,444
Corporate, non-Segment
Disaggregation of Revenue [Line Items]
Total revenue	401,189	382,023	357,705
Corporate, non-Segment \| Total patient services revenue
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Corporate, non-Segment \| Medicare
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Corporate, non-Segment \| Non-Medicare
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0
Corporate, non-Segment \| Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 401,189	$ 382,023	$ 357,705