Segment Information - Reportable Segment Information (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Dec. 31, 2024 segment	Jun. 30, 2024 segment	Dec. 31, 2024 USD ($) branch segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	4	3	4
Number of branches | branch			38
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			$ 1,804,104	$ 1,570,402	$ 1,151,422
Cost of goods sold			1,190,329	1,018,527	760,524
Selling, general and administrative expenses			557,820	508,884	349,112
Operating income (loss)			55,955	42,991	41,786
Loss on extinguishment of debt			0	0	(3,395)
Change in fair value of earnout liabilities			(988)	758	(483)
Other income (expense), net			(358)	(2,982)	(670)
Income (loss) before income taxes			(536)	(2,007)	12,937
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Interest expense			(55,145)	(42,774)	(24,301)
Loss on extinguishment of debt			0	0	(3,395)
Change in fair value of earnout liabilities			(988)	758	(483)
Other income (expense), net			(358)	(2,982)	(670)
Income (loss) before income taxes			(536)	(2,007)	12,937
Intersegment elimination
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			(1,942)	(1,700)	0
Cost of goods sold			(1,948)	(1,700)	0
All Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Selling, general and administrative expenses			5,130	5,773	2,030
Operating income (loss)			(5,124)	(5,773)	(2,030)
Lawson
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			468,976	468,379	324,783
Lawson | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			469,044	468,711	324,783
Cost of goods sold			211,784	203,251	154,030
Selling, general and administrative expenses			242,705	232,962	164,217
Operating income (loss)			14,555	32,498	6,536
Lawson | Intersegment elimination
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			68	332	0
TestEquity
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			770,866	641,643	392,358
TestEquity | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			771,180	641,768	392,358
Cost of goods sold			595,368	499,916	302,980
Selling, general and administrative expenses			171,845	158,317	78,003
Operating income (loss)			3,967	(16,465)	11,375
TestEquity | Intersegment elimination
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			314	125	0
Gexpro Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			439,163	404,490	385,326
Gexpro Services | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			440,723	405,733	385,326
Cost of goods sold			302,228	284,664	272,462
Selling, general and administrative expenses			101,962	94,069	91,573
Operating income (loss)			36,533	27,000	21,291
Gexpro Services | Intersegment elimination
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			1,560	1,243	0
Canada Branch Division
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			125,099	55,890	48,955
Canada Branch Division | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			125,099	55,890	48,955
Cost of goods sold			82,897	32,396	31,052
Selling, general and administrative expenses			36,178	17,763	13,289
Operating income (loss)			6,024	5,731	$ 4,614
Canada Branch Division | Intersegment elimination
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue			$ 0	$ 0