SEGMENT INFORMATION - Schedule of Corporate and Other Expenses Reconcile Segment Operating Income to Total Consolidated Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	$ 1,199,523	$ 1,098,944
Cost of sales	838,094	773,862
Selling, distribution, and administrative expense, including depreciation	232,399	211,910
Segment operating income	129,030	113,172
Corporate & other expense, net	20,883	22,000
Interest expense, net	993	(627)
Other income, net	(548)	(2,281)
Income before income taxes	128,585	116,080
Operating Segments
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	1,217,421	1,112,243
Intersegment Eliminations
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	17,898	13,299
Service Center
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	782,474	749,739
Cost of sales	556,201	536,073
Selling, distribution, and administrative expense, including depreciation	122,220	119,840
Segment operating income	104,053	93,826
Service Center | Operating Segments
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	783,848	750,345
Service Center | Intersegment Eliminations
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	1,374	606
Engineered Solutions
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	417,049	349,205
Cost of sales	281,893	237,789
Selling, distribution, and administrative expense, including depreciation	89,296	70,070
Segment operating income	45,860	41,346
Engineered Solutions | Operating Segments
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	433,573	361,898
Engineered Solutions | Intersegment Eliminations
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Net sales	16,524	12,693
Reportable Segments
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Segment operating income	$ 149,913	$ 135,172