Segment Information - Reportable Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) branch segment	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	3
Number of branches | branch	14
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,570,402	$ 1,151,422
Total operating income (loss)	42,991	41,786
Long-lived assets	874,413	720,067
Capital expenditures	15,337	8,307
Depreciation and amortization	63,588	45,186
All Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	55,890	48,955
Total operating income (loss)	(42)	2,584
Long-lived assets	42,132	40,696
Capital expenditures	703	511
Depreciation and amortization	2,068	1,937
Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	(1,700)	0
Lawson
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	468,379	324,783
Lawson | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	468,711	324,783
Total operating income (loss)	32,498	6,536
Long-lived assets	312,136	324,732
Capital expenditures	6,626	3,737
Depreciation and amortization	19,532	10,594
Lawson | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	332
TestEquity
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	641,643	392,358
TestEquity | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	641,768	392,358
Total operating income (loss)	(16,465)	11,375
Long-lived assets	378,348	201,919
Capital expenditures	2,955	250
Depreciation and amortization	26,002	17,480
TestEquity | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	125
Gexpro Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	404,490	385,326
Gexpro Services | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	405,733	385,326
Total operating income (loss)	27,000	21,291
Long-lived assets	141,797	152,720
Capital expenditures	5,053	3,809
Depreciation and amortization	15,986	$ 15,175
Gexpro Services | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,243