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OTHER COMPREHENSIVE INCOME (LOSS) - AOCI (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Class of Stock [Line Items]            
Total $ 214,742 $ 227,776 $ 224,888 $ 202,186 $ 285,022 $ 315,244
Total            
Class of Stock [Line Items]            
Total (73,306) $ (75,723) (58,024) $ (64,431) $ (59,535) $ (70,010)
Foreign currency translation adjustments            
Class of Stock [Line Items]            
Total (55,634)   (38,586)      
Pension and other defined benefit plans            
Class of Stock [Line Items]            
Total (18,531)   (19,127)      
Cash flow hedges            
Class of Stock [Line Items]            
Total $ 859   $ (311)