Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Segment Reporting Information [Line Items]
Net sales	$ 1,073,001	$ 1,077,153	$ 2,171,945	$ 2,172,341
Operating income for reportable segments	120,870	114,594	234,042	235,274
Assets used in business	3,044,641	2,782,765	3,044,641	2,782,765	$ 2,951,910
Depreciation and amortization of property	5,926	6,048	11,850	11,765
Capital expenditures	5,197	5,523	10,746	9,863
Service Center Based Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	723,827	729,273	1,473,566	1,475,806
Operating income for reportable segments	92,785	91,440	187,412	188,321
Assets used in business	1,588,471	1,759,794	1,588,471	1,759,794
Depreciation and amortization of property	4,383	4,355	8,802	8,791
Capital expenditures	4,644	4,400	9,079	8,034
Engineered Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	349,174	347,880	698,379	696,535
Operating income for reportable segments	55,533	51,167	103,678	100,762
Assets used in business	1,456,170	1,022,971	1,456,170	1,022,971
Depreciation and amortization of property	1,543	1,693	3,048	2,974
Capital expenditures	553	1,123	1,667	1,829
Reportable Segments Total
Segment Reporting Information [Line Items]
Operating income for reportable segments	$ 148,318	$ 142,607	$ 291,090	$ 289,083