v3.26.1
OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Amounts Reclassified From Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2026
Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Tax benefit $ (18,038)   $ (17,782)   $ (38,189) $ (38,516)
Net income 19,318 $ 64,387 56,762 $ 70,851 83,705 127,613
Total | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Total gain (loss) before tax (1,710)   (673)   (3,618) (1,178)
Tax benefit 359   141   760 247
Net income (1,351)   (532)   (2,858) (931)
Pension amortization | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Total gain (loss) before tax (1,970)   (285)   (3,940) (570)
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Total gain (loss) before tax $ 260   $ (388)   $ 322 $ (608)