GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Other intangible assets subject to amortization:
Other intangible assets subject to amortization, gross carrying amount	$ 815,663	$ 817,735
Other intangible assets subject to amortization, accumulated amortization	154,174	110,861
Other intangible assets not subject to amortization:
Other intangible assets not subject to amortization	47,170	47,170
Other intangible assets	862,833	864,905
Other indefinite-lived intangibles
Other intangible assets not subject to amortization:
Other intangible assets not subject to amortization	47,170	47,170
Product technology, trade secrets and know-how
Other intangible assets subject to amortization:
Other intangible assets subject to amortization, gross carrying amount	121,579	123,948
Other intangible assets subject to amortization, accumulated amortization	42,230	37,993
Acquired patents and licenses
Other intangible assets subject to amortization:
Other intangible assets subject to amortization, gross carrying amount	9,023	9,023
Other intangible assets subject to amortization, accumulated amortization	8,558	8,397
Customer relationships, trade names, and distribution rights
Other intangible assets subject to amortization:
Other intangible assets subject to amortization, gross carrying amount	685,061	684,764
Other intangible assets subject to amortization, accumulated amortization	$ 103,386	$ 64,471