SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenue	$ 3,761,050	$ 3,388,708	$ 3,073,278
Total cost of services provided (exclusive of depreciation and amortization below)	1,777,006	1,603,197	1,469,871
Sales, general and administrative	1,133,232	1,015,067	915,233
Restructuring costs	0	0	5,196
Depreciation and amortization	124,744	113,220	99,752
Interest expense, net	28,558	27,677	19,055
Income tax expense	174,221	163,851	151,300
Net income	526,705	466,379	434,957
Reportable Segment
Segment Reporting Information [Line Items]
Revenue	3,761,050	3,388,708	3,073,278
Employee expenses	1,166,044	1,048,992	953,600
Materials and supplies	225,462	212,296	197,825
Insurance and claims	66,897	68,326	60,390
Fleet expenses	157,461	131,898	127,390
Other cost of services provided	161,142	141,685	130,666
Total cost of services provided (exclusive of depreciation and amortization below)	1,777,006	1,603,197	1,469,871
Selling and marketing expenses	484,859	427,916	375,805
Administrative employee expenses	345,643	313,814	291,772
Insurance and claims	40,816	41,434	37,946
Fleet expenses	39,608	33,580	31,415
Other sales, general and administrative	222,306	198,323	178,295
Sales, general and administrative	1,133,232	1,015,067	915,233
Restructuring costs	0	0	5,196
Depreciation and amortization	124,744	113,220	99,752
Interest expense, net	28,558	27,677	19,055
Other (income) expense, net	(3,416)	(683)	(22,086)
Income tax expense	174,221	163,851	151,300
Net income	$ 526,705	$ 466,379	$ 434,957