INCOME TAXES (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Examination [Line Items]
U.S. Federal income tax provision (benefit) rate	21.00%	21.00%	24.50%
Provisional transition tax charge			$ (20,587,000)
Transition tax charge under TCJA			12,699,000
Transition tax charge under TCJA, remaining amount	$ 8,344,000
Deferred tax assets, lease obligations	43,045,000
Deferred tax liabilities, leasing arrangements	(41,747,000)
Valuation allowance increase (decrease)	(999,000)
Undistributed earnings of foreign subsidiaries	100,102,000
Deferred tax assets, valuation allowance	9,824,000	$ 10,823,000
Potential tax benefits impact on effective tax rate	909,000
Liability for uncertainty in income taxes, current	77,000	66,000
Domestic Tax Authority
Income Tax Examination [Line Items]
Operating loss carryforwards	0	5,419,000
Interest loss carryforwards	0	25,000,000
Tax credit carryforward amount	5,954,000	8,948,000
Domestic Tax Authority | Capital Loss Carryforward
Income Tax Examination [Line Items]
Tax credit carryforward amount	10,500,000	9,524,000
Non-U.S. Tax Authority
Income Tax Examination [Line Items]
Operating loss carryforwards	9,671,000	7,413,000
State and Local Jurisdiction
Income Tax Examination [Line Items]
Operating loss carryforwards	$ 124,191,000	$ 127,354,000
Previously Reported
Income Tax Examination [Line Items]
Transition tax charge under TCJA			$ 13,100,000