Segment Information - Schedule of Total Assets By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Assets	$ 1,766,526		$ 1,766,526		$ 1,727,255
Long-lived assets	978,509		978,509		995,029
Capital expenditures	11,179	$ 5,751	28,645	$ 14,794
Depreciation and amortization	20,042	18,624	60,359	54,211
Operating Segments | United States
Segment Reporting Information [Line Items]
Long-lived assets	795,829		795,829		818,100
Operating Segments | Canada
Segment Reporting Information [Line Items]
Long-lived assets	141,668		141,668		138,218
Operating Segments | Europe
Segment Reporting Information [Line Items]
Long-lived assets	31,459		31,459		30,345
Operating Segments | Pacific Rim
Segment Reporting Information [Line Items]
Long-lived assets	6,196		6,196		4,751
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Long-lived assets	3,357		3,357		3,615
Operating Segments | Other
Segment Reporting Information [Line Items]
Long-lived assets	0		0		0
Operating Segments | Lawson
Segment Reporting Information [Line Items]
Assets	543,100		543,100		524,077
Capital expenditures	2,706	1,277	7,534	3,481
Depreciation and amortization	6,666	6,533	20,026	18,131
Operating Segments | TestEquity
Segment Reporting Information [Line Items]
Assets	629,821		629,821		654,315
Capital expenditures	7,357	2,974	16,646	7,715
Depreciation and amortization	8,220	7,460	24,628	22,751
Operating Segments | Gexpro Services
Segment Reporting Information [Line Items]
Assets	351,232		351,232		331,811
Capital expenditures	588	1,260	2,974	2,808
Depreciation and amortization	3,541	3,840	10,526	11,505
Operating Segments | Canada Branch Division
Segment Reporting Information [Line Items]
Assets	216,899		216,899		199,362
Capital expenditures	528	240	1,491	790
Depreciation and amortization	1,615	791	5,179	1,824
All Other
Segment Reporting Information [Line Items]
Assets	25,474		25,474		$ 17,690
Capital expenditures	0	0	0	0
Depreciation and amortization	$ 0	$ 0	$ 0	$ 0