Revenue Recognition Revenue Recognition (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 4,412,794	$ 3,810,676	$ 3,235,919
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	3,860,421	3,299,750	2,782,859
CANADA
Disaggregation of Revenue [Line Items]
Net sales	315,499	291,530	255,360
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	236,874	219,396	197,700
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,966,842	2,565,604	2,199,533
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	2,441,281	2,081,566	1,768,965
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	315,499	291,530	255,360
Service Center Based Distribution Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	210,062	192,508	175,208
Engineered Solutions Segment
Disaggregation of Revenue [Line Items]
Net sales	1,445,952	1,245,072	1,036,386
Engineered Solutions Segment | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	1,419,140	1,218,184	1,013,894
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	$ 26,812	$ 26,888	$ 22,492