Revenue Recognition Revenue Recognition (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 4,479,406	$ 4,412,794	$ 3,810,676
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	3,932,189	3,860,421	3,299,750
CANADA
Disaggregation of Revenue [Line Items]
Net sales	310,210	315,499	291,530
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	237,007	236,874	219,396
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,056,555	2,966,842	2,565,604
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	2,540,427	2,441,281	2,081,566
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	310,210	315,499	291,530
Service Center Based Distribution Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	205,918	210,062	192,508
Engineered Solutions Segment
Disaggregation of Revenue [Line Items]
Net sales	1,422,851	1,445,952	1,245,072
Engineered Solutions Segment | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	1,391,762	1,419,140	1,218,184
Engineered Solutions Segment | CANADA
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Engineered Solutions Segment | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 31,089	$ 26,812	$ 26,888