Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Segment financial information
Net sales	$ 4,412,794	$ 3,810,676	$ 3,235,919
Operating income for reportable segments	473,151	357,858	205,454
Assets used in the business	2,743,332	2,452,588	2,271,807
Depreciation and amortization of property	22,266	21,676	20,780
Capital expenditures	26,476	18,124	15,852
Service Center Based Distribution Segment [Member]
Segment financial information
Net sales	2,966,842	2,565,604	2,199,533
Operating income for reportable segments	373,439	301,881	225,206
Assets used in the business	1,736,393	1,455,293	1,332,720
Depreciation and amortization of property	17,932	17,509	17,155
Capital expenditures	15,390	14,486	13,735
Engineered Solutions Segment
Segment financial information
Net sales	1,445,952	1,245,072	1,036,386
Operating income for reportable segments	203,404	156,644	121,782
Assets used in the business	1,006,939	997,295	939,087
Depreciation and amortization of property	4,334	4,167	3,625
Capital expenditures	11,086	3,638	2,117
Reportable Segments
Segment financial information
Operating income for reportable segments	$ 576,843	$ 458,525	$ 346,988