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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in carrying amount of goodwill (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2024 USD ($)
GOODWILL AND OTHER INTANGIBLE ASSETS
Beginning Balance	$ 539,899
Foreign currency translation	(7,600)
Ending Balance	532,312
USG
GOODWILL AND OTHER INTANGIBLE ASSETS
Beginning Balance	356,900
Foreign currency translation	(5,500)
Ending Balance	351,400
Test
GOODWILL AND OTHER INTANGIBLE ASSETS
Beginning Balance	67,400
Foreign currency translation	(2,100)
Ending Balance	65,300
A&D
GOODWILL AND OTHER INTANGIBLE ASSETS
Beginning Balance	115,600
Ending Balance	$ 115,600

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