ACQUISITION (Details) - USD ($) $ in Thousands		6 Months Ended
	Nov. 09, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
ACQUISITION
Payments to acquire businesses net of cash acquired		$ 56,179	$ 17,901
Goodwill		30,300
Goodwill		$ 535,661		$ 503,177
MPE Limited (MPE)
ACQUISITION
Payments to acquire businesses net of cash acquired	$ 56,200
Fair value of accounts receivable acquired	400
Fair value of inventory acquired	1,100
Fair value of property, plant and equipment acquired	1,700
Fair value of accounts payable and accrued expenses acquired	700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	7,800
Business combination recognized identifiable assets acquired and liabilities assumed finite-lived intangibles	29,100
Customer Relationships | MPE Limited (MPE)
ACQUISITION
Fair value of identifiable intangible assets acquired	$ 31,100