REVENUE RECOGNITION- Schedule of Net Sales by Reportable Segment and by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total	$ 1,199,523	$ 1,098,944
United States
Disaggregation of Revenue [Line Items]
Total	1,056,487	957,233
Canada
Disaggregation of Revenue [Line Items]
Total	75,317	71,476
Other countries
Disaggregation of Revenue [Line Items]
Total	67,719	70,235
Service Center
Disaggregation of Revenue [Line Items]
Total	782,474	749,739
Service Center | United States
Disaggregation of Revenue [Line Items]
Total	656,804	625,682
Service Center | Canada
Disaggregation of Revenue [Line Items]
Total	75,317	71,476
Service Center | Other countries
Disaggregation of Revenue [Line Items]
Total	50,353	52,581
Engineered Solutions
Disaggregation of Revenue [Line Items]
Total	417,049	349,205
Engineered Solutions | United States
Disaggregation of Revenue [Line Items]
Total	399,683	331,551
Engineered Solutions | Canada
Disaggregation of Revenue [Line Items]
Total	0	0
Engineered Solutions | Other countries
Disaggregation of Revenue [Line Items]
Total	$ 17,366	$ 17,654