Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Segment Reporting Information [Line Items]
Net sales	$ 1,077,153	$ 1,060,280	$ 2,172,341	$ 2,122,685
Operating income for reportable segments	114,594	112,893	235,274	219,425
Assets used in business	2,782,765	2,522,904	2,782,765	2,522,904	$ 2,743,332
Depreciation and amortization of property	6,048	5,552	11,765	11,033
Capital expenditures	5,523	7,263	9,863	12,817
Service Center Based Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	729,273	705,392	1,475,806	1,423,380
Operating income for reportable segments	91,440	86,484	188,321	175,293
Assets used in business	1,759,794	1,454,040	1,759,794	1,454,040
Depreciation and amortization of property	4,355	4,474	8,791	8,923
Capital expenditures	4,400	4,751	8,034	8,316
Engineered Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	347,880	354,888	696,535	699,305
Operating income for reportable segments	51,167	51,626	100,762	97,160
Assets used in business	1,022,971	1,068,864	1,022,971	1,068,864
Depreciation and amortization of property	1,693	1,078	2,974	2,110
Capital expenditures	1,123	2,512	1,829	4,501
Reportable Segments Total
Segment Reporting Information [Line Items]
Operating income for reportable segments	$ 142,607	$ 138,110	$ 289,083	$ 272,453