Segment Reporting - Reportable Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) branch segment	Sep. 30, 2022 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Number of branches | branch			14
Segment Reporting Information [Line Items]
Revenue	$ 438,909	$ 347,151	$ 1,165,163	$ 822,572
Operating income (loss)	12,783	22,027	43,280	29,128
All Other
Segment Reporting Information [Line Items]
Revenue	13,543	17,275	42,655	33,612
Operating income (loss)	(165)	1,107	621	1,921
Lawson | Operating Segments
Segment Reporting Information [Line Items]
Revenue	114,477	109,418	358,903	216,752
Operating income (loss)	10,643	5,352	27,358	2,792
TestEquity | Operating Segments
Segment Reporting Information [Line Items]
Revenue	207,657	116,709	451,082	286,984
Operating income (loss)	(5,027)	7,576	(8,183)	7,443
Gexpro Services | Operating Segments
Segment Reporting Information [Line Items]
Revenue	103,232	103,749	312,523	285,224
Operating income (loss)	$ 7,332	$ 7,992	$ 23,484	$ 16,972