Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Jun. 30, 2024
Segment Reporting Information [Line Items]
Net sales	$ 1,166,749	$ 1,146,390	$ 3,338,694	$ 3,318,731
Operating income for reportable segments	129,402	121,206	363,444	356,480
Assets used in business	3,115,663	2,854,943	3,115,663	2,854,943	$ 2,951,910
Depreciation and amortization of property	6,583	5,802	18,433	17,567
Capital expenditures	7,549	7,491	18,295	17,354
Service Center Based Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	761,602	789,356	2,235,168	2,265,162
Operating income for reportable segments	107,164	100,470	294,576	288,791
Assets used in business	1,666,452	1,832,897	1,666,452	1,832,897
Depreciation and amortization of property	4,477	4,431	13,279	13,222
Capital expenditures	6,667	4,230	15,746	12,264
Engineered Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	405,147	357,034	1,103,526	1,053,569
Operating income for reportable segments	53,958	49,511	157,636	150,273
Assets used in business	1,449,211	1,022,046	1,449,211	1,022,046
Depreciation and amortization of property	2,106	1,371	5,154	4,345
Capital expenditures	882	3,261	2,549	5,090
Reportable Segments Total
Segment Reporting Information [Line Items]
Operating income for reportable segments	$ 161,122	$ 149,981	$ 452,212	$ 439,064