INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 24,533	$ 11,082	$ 31,851	$ 22,790
Income before taxes from continuing operations	83,104	29,201	107,327	66,339
Restructuring charges	4,766	7,502	6,482	10,581
Restructuring charges, net of tax	3,496	5,605	4,826	7,906
Effective income tax rate reconciliation, acquisition cost	6,708		9,303
Effective income tax rate reconciliation, acquisition cost, net of tax	6,146		8,149
Effective income tax rate reconciliation, proxy contest cost	4,661		6,952
Effective income tax rate reconciliation, proxy contest cost, net of tax	3,591		5,359
Effective income tax rate reconciliation, acquired inventory sold	2,701		2,701
Effective income tax rate reconciliation, acquired inventory sold, net of tax	2,007		2,007
Other tax expense (benefit) that affect comparability	$ (693)	$ 1,417	$ (1,574)	$ 369
Effective tax rate	28.30%	31.50%	29.00%	32.60%