GOODWILL AND OTHER INTANGIBLES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 2,512	$ 1,783	$ 4,930	$ 4,039
Estimated amortization expense, remainder of 2019	4,400		4,400
Estimated amortization expense, fiscal 2020	8,825		8,825
Estimated amortization expense, fiscal 2021	8,825		8,825
Estimated amortization expense, fiscal 2022	8,825		8,825
Estimated amortization expense, fiscal 2023	8,746		8,746
Estimated amortization expense, fiscal 2024	8,700		8,700
Estimated amortization expense, thereafter	$ 95,022		$ 95,022