INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Provision from income taxes	$ 2,034	$ 3,194	$ 8,373	$ 8,406
Income before taxes from continuing operations	2,929	9,684	19,880	23,649
Restructuring charges	3,104		9,538
Restructuring charges, net of tax	3,005		7,153
Acquisition costs	2,960		2,960
Acquisition costs, net of tax	2,321		2,321
Loss from debt extinguishment	6,690		6,690
Loss from debt extinguishment, net of tax	5,245		5,245
Other tax provisions (benefits)	$ (1,413)	$ (97)	$ (580)	$ 370
Effective tax rate	35.90%	34.00%	34.40%	34.00%

Effective Income Tax Rate Reconciliation, Nondeductible Expense, Acquisition-related Costs, Amount

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible restructuring charges.

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