Long-Term Debt - Credit Facilities (Details) - USD ($) $ in Millions	Jul. 26, 2024	Dec. 31, 2024	Jul. 11, 2024
Concentra Credit Facilities | Revolving facility
Long-term debt and notes payable
Percentage of capital stock of foreign subsidiaries	65.00%
Covenant leverage ratio	6.50
Actual leverage ratio		3.46
Percentage of net cash proceeds from issuance of debt obligations	100.00%
Concentra Credit Facilities | Revolving facility | Ratio One
Long-term debt and notes payable
Percentage of net cash proceeds received	100.00%
Concentra Credit Facilities | Revolving facility | Ratio Two
Long-term debt and notes payable
Percentage of net cash proceeds received	50.00%
Concentra Credit Facilities | Revolving facility | Ratio Four
Long-term debt and notes payable
Percentage prepaid	50.00%
Concentra Credit Facilities | Revolving facility | Ratio Five
Long-term debt and notes payable
Percentage prepaid	25.00%
Concentra Credit Facilities | Revolving facility | Minimum
Long-term debt and notes payable
Covenant leverage ratio	4.00
Concentra Credit Facilities | Revolving facility | Minimum | Ratio One
Long-term debt and notes payable
Debt instrument, total net leverage ratio	4.50
Concentra Credit Facilities | Revolving facility | Minimum | Ratio Three
Long-term debt and notes payable
Debt instrument, total net leverage ratio	4.00
Concentra Credit Facilities | Revolving facility | Minimum | Ratio Four
Long-term debt and notes payable
Covenant leverage ratio	4.50
Concentra Credit Facilities | Revolving facility | Maximum | Ratio Two
Long-term debt and notes payable
Debt instrument, total net leverage ratio	4.50
Concentra Credit Facilities | Revolving facility | Maximum | Ratio Five
Long-term debt and notes payable
Covenant leverage ratio	4.50
Concentra Credit Facilities | Revolving facility | Maximum | Ratio Six
Long-term debt and notes payable
Covenant leverage ratio	4.00
6.875% senior notes | Senior notes
Long-term debt and notes payable
Interest rate of debt		6.875%	6.875%
Aggregate principal amount			$ 650.0
Term loan | Revolving facility
Long-term debt and notes payable
Interest rate of debt		6.61%
Term loan | Concentra Term Loan | Revolving facility
Long-term debt and notes payable
Maximum borrowing capacity	$ 850.0
Debt instrument period payment principal percentage	0.25%
Term loan | Concentra Term Loan | Revolving facility | Minimum | Term Secured Overnight Financing Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	2.00%
Term loan | Concentra Term Loan | Revolving facility | Minimum | Alternate Base Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	1.00%
Term loan | Concentra Term Loan | Revolving facility | Maximum | Term Secured Overnight Financing Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	2.25%
Term loan | Concentra Term Loan | Revolving facility | Maximum | Alternate Base Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	1.25%
Revolving facility | Concentra Revolving Credit Facility | Revolving facility
Long-term debt and notes payable
Maximum borrowing capacity	$ 400.0
Remaining borrowing capacity		$ 386.4
Revolving facility | Concentra Revolving Credit Facility | Revolving facility | Minimum | Term Secured Overnight Financing Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	2.25%
Revolving facility | Concentra Revolving Credit Facility | Revolving facility | Minimum | Alternate Base Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	1.25%
Revolving facility | Concentra Revolving Credit Facility | Revolving facility | Maximum | Term Secured Overnight Financing Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	2.75%
Revolving facility | Concentra Revolving Credit Facility | Revolving facility | Maximum | Alternate Base Rate
Long-term debt and notes payable
Interest rate margin (as a percent)	1.75%
Standby letters of credit | Concentra Revolving Credit Facility | Revolving facility
Long-term debt and notes payable
Maximum borrowing capacity	$ 75.0
Letter of credit | Concentra Revolving Credit Facility | Revolving facility
Long-term debt and notes payable
Outstanding borrowings		$ 13.6