Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Segment Reporting Information [Line Items]
Net sales	$ 1,146,390	$ 1,132,035	$ 3,318,731	$ 3,254,720
Operating income for reportable segments	121,206	126,911	356,480	346,336
Assets used in business	2,854,943	2,608,638	2,854,943	2,608,638	$ 2,743,332
Depreciation and amortization of property	5,802	5,565	17,567	16,598
Capital expenditures	7,491	7,992	17,354	20,809
Service Center Based Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	789,356	761,599	2,265,162	2,184,979
Operating income for reportable segments	100,470	103,083	288,791	278,376
Assets used in business	1,832,897	1,537,793	1,832,897	1,537,793
Depreciation and amortization of property	4,431	4,486	13,222	13,409
Capital expenditures	4,230	3,413	12,264	11,729
Engineered Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	357,034	370,436	1,053,569	1,069,741
Operating income for reportable segments	49,511	51,917	150,273	149,077
Assets used in business	1,022,046	1,070,845	1,022,046	1,070,845
Depreciation and amortization of property	1,371	1,079	4,345	3,189
Capital expenditures	3,261	4,579	5,090	9,080
Reportable Segments Total
Segment Reporting Information [Line Items]
Operating income for reportable segments	$ 149,981	$ 155,000	$ 439,064	$ 427,453