NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate		5.66%
Cash Interest	$ 62,673	$ 60,349	$ 47,002
Amort. Debt Discount	270	270	1,518
Amort. Deferred Cost & Other Fees	5,123	4,949	2,993
Total Interest Expense	$ 68,066	65,568	$ 51,513
Senior note due 2022 [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	5.66%		5.55%
Cash Interest	$ 52,500	52,500	$ 38,063
Amort. Debt Discount	270	270	270
Amort. Deferred Cost & Other Fees	3,803	3,803	1,857
Total Interest Expense	56,573	$ 56,573	40,190
Revolver due 2018 [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	6,998		4,951
Amort. Debt Discount	0		0
Amort. Deferred Cost & Other Fees	980		567
Total Interest Expense	$ 7,978		$ 5,518
Convert. debt due 2017 [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate			8.90%
Cash Interest			$ 1,167
Amort. Debt Discount			1,248
Amort. Deferred Cost & Other Fees			148
Total Interest Expense			$ 2,563
Real estate mortgages [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate		3.30%	2.60%
Cash Interest		$ 349	$ 582
Amort. Debt Discount		0	0
Amort. Deferred Cost & Other Fees		320	58
Total Interest Expense		$ 669	$ 640
ESOP Loans [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	6.30%	6.30%	4.20%
Cash Interest	$ 937	$ 1,802	$ 1,557
Amort. Debt Discount	0	0	0
Amort. Deferred Cost & Other Fees	186	124	133
Total Interest Expense	1,123	1,926	$ 1,690
Capital lease - real estate [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate			5.50%
Cash Interest	372	581	$ 296
Amort. Debt Discount	0	0	0
Amort. Deferred Cost & Other Fees	25	25	25
Total Interest Expense	397	606	321
Non U.S. lines of credit [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	19	34	76
Amort. Debt Discount	0	0	0
Amort. Deferred Cost & Other Fees	15	15	128
Total Interest Expense	34	49	204
Non U.S. term loans [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	1,592	1,420	860
Amort. Debt Discount	0	0	0
Amort. Deferred Cost & Other Fees	109	90	67
Total Interest Expense	1,701	1,510	927
Other long term debt [Member]
NOTES PAYABLE, CAPITALIZED LEASES AND LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	640	494	245
Amort. Debt Discount		0	0
Amort. Deferred Cost & Other Fees	5	7	10
Total Interest Expense	$ 645	$ 501	$ 255