INCOME TAXES - Components of net deferred tax asset (liability), by balance sheet account (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Income Tax Contingency [Line Items]
Net deferred liability	$ 48,106	$ 32,782
Other assets
Income Tax Contingency [Line Items]
Net deferred asset	323	614
Other liabilities
Income Tax Contingency [Line Items]
Net deferred liability	49,289	34,356
Liabilities of discontinued operations
Income Tax Contingency [Line Items]
Net deferred asset	$ 860	$ 960