Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 550,785	$ 477,915	$ 1,051,537	$ 945,513
Total occupational health center revenue
Disaggregation of Revenue [Line Items]
Revenue	516,138	451,240	989,060	892,312
Onsite health clinics
Disaggregation of Revenue [Line Items]
Revenue	22,569	15,539	39,119	31,396
Other
Disaggregation of Revenue [Line Items]
Revenue	12,078	11,136	23,358	21,805
Workers’ compensation
Disaggregation of Revenue [Line Items]
Revenue	332,191	288,405	634,298	568,271
Employer services
Disaggregation of Revenue [Line Items]
Revenue	174,318	153,305	334,458	304,040
Consumer health
Disaggregation of Revenue [Line Items]
Revenue	7,177	7,669	15,788	15,995
Other occupational health center revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 2,452	$ 1,861	$ 4,516	$ 4,006