Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	2
Segment Reporting Information [Line Items]
Revenues	$ 1,837,173	$ 1,715,682	$ 1,671,389
Significant Segment Expenses
Bad debt expense	83,079	46,760	35,604
Depreciation and amortization expense	16,778	14,585	14,344
Unallocated expenses (income)
ERC refunds	(2,100)
Corporate expenses	190,866	183,060	166,772
Interest expense	1,580	6,438	7,856
Income before taxes	67,866	52,941	53,056
Capital expenditures	5,818	6,336	5,406
Environmental Services
Segment Reporting Information [Line Items]
Revenues	824,700	765,400	766,700
Dietary
Segment Reporting Information [Line Items]
Revenues	1,012,500	950,300	904,700
Reportable Segments
Segment Reporting Information [Line Items]
Revenues	1,837,173	1,715,682	1,671,389
Significant Segment Expenses
Segment profit	97,271	121,431	116,740
Reportable Segments | Environmental Services
Segment Reporting Information [Line Items]
Revenues	824,681	765,368	766,651
Significant Segment Expenses
Labor and labor-related	645,335	600,198	599,881
Food, chemicals and supplies	59,150	56,504	58,627
Bad debt expense	29,096	14,101	17,557
Depreciation and amortization expense	4,467	3,701	3,664
Other segment items	14,382	15,454	14,907
Segment profit	$ 72,251	$ 75,410	$ 72,015
Segment margin	8.80%	9.90%	9.40%
Unallocated expenses (income)
Capital expenditures	$ 4,526	$ 5,166	$ 4,684
Reportable Segments | Dietary
Segment Reporting Information [Line Items]
Revenues	1,012,492	950,314	904,738
Significant Segment Expenses
Labor and labor-related	595,419	537,446	522,052
Food, chemicals and supplies	312,728	308,859	294,690
Bad debt expense	53,983	32,659	18,046
Depreciation and amortization expense	3,716	2,856	3,779
Other segment items	21,626	22,473	21,446
Segment profit	$ 25,020	$ 46,021	$ 44,725
Segment margin	2.50%	4.80%	4.90%
Unallocated expenses (income)
Capital expenditures	$ 879	$ 936	$ 494
Corporate
Unallocated expenses (income)
ERC refunds	(34,239)
Corporate expenses	75,710	68,160	62,082
Gain (loss) on deferred compensation plan investments	7,261	8,241	6,684
Other (income), net	(20,907)	(14,349)	(12,938)
Interest expense	1,580	6,438	7,856
Income before taxes		52,941	53,056
Capital expenditures	$ 413	$ 234	$ 228