Revenue Recognition Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 1,166,749	$ 1,146,390	$ 3,338,694	$ 3,318,731
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	1,032,283	1,017,167	2,919,065	2,921,177
CANADA
Disaggregation of Revenue [Line Items]
Net sales	71,555	73,388	220,808	225,858
Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	62,911	55,835	198,821	171,696
Service Center Based Distribution Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	761,602	789,356	2,235,168	2,265,162
Service Center Based Distribution Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	643,479	666,170	1,868,962	1,885,915
Service Center Based Distribution Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	71,555	73,388	220,808	225,858
Service Center Based Distribution Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,568	49,798	145,398	153,389
Engineered Solutions Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	405,147	357,034	1,103,526	1,053,569
Engineered Solutions Segment [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	388,804	350,997	1,050,103	1,035,262
Engineered Solutions Segment [Member] | CANADA
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Engineered Solutions Segment [Member] | Other Countries [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 16,343	$ 6,037	$ 53,423	$ 18,307