v3.24.2
SHAREHOLDERS' EQUITY - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Rollforward of accumulated other comprehensive income (loss), net of tax    
Beginning balance $ 2,803,074 $ 2,771,943
Ending balance 2,856,845 2,856,845
Unrealized Loss on Available-for-Sale Securities    
Rollforward of accumulated other comprehensive income (loss), net of tax    
Beginning balance 0 0
Other comprehensive loss before reclassifications (920) (920)
Amounts reclassified from accumulated other comprehensive income 0 0
Net current-period other comprehensive loss (920) (920)
Ending balance (920) (920)
Unrealized pension actuarial loss    
Rollforward of accumulated other comprehensive income (loss), net of tax    
Beginning balance (7,713) (7,981)
Other comprehensive loss before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive income 134 402
Net current-period other comprehensive loss 134 402
Ending balance (7,579) (7,579)
Accumulated Other Comprehensive Income (Loss)    
Rollforward of accumulated other comprehensive income (loss), net of tax    
Beginning balance (7,713) (7,981)
Other comprehensive loss before reclassifications (920) (920)
Amounts reclassified from accumulated other comprehensive income 134 402
Net current-period other comprehensive loss (786) (518)
Ending balance $ (8,499) $ (8,499)