LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	$ 11,874	$ 11,153	$ 34,973	$ 32,183
Amort. Debt Discount	67	1,129	1,450	3,256
Amort. Deferred Cost & Other Fees	788	757	2,324	2,015
Total Interest Expense	$ 12,729	$ 13,039	$ 38,747	$ 37,454
Senior notes due 2022 [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	5.60%	5.50%	5.60%	5.50%
Cash Interest	$ 9,516	$ 8,641	$ 28,547	$ 24,391
Amort. Debt Discount	67	36	202	36
Amort. Deferred Cost & Other Fees	462	383	1,396	1,028
Total Interest Expense	10,045	9,060	30,145	25,455
Revolver due 2019 [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	1,629	660	3,280	2,185
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	140	137	422	374
Total Interest Expense	1,769	$ 797	$ 3,702	$ 2,559
Convert. debt due 2017 [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate		9.10%	8.90%	9.00%
Cash Interest	0	$ 1,000	$ 1,167	$ 3,000
Amort. Debt Discount	0	1,093	1,248	3,220
Amort. Deferred Cost & Other Fees	0	111	148	333
Total Interest Expense	$ 0	$ 2,204	$ 2,563	$ 6,553
Real estate mortgages [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	2.60%	2.30%	2.40%	2.20%
Cash Interest	$ 234	$ 194	$ 650	$ 499
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	36	26	56	55
Total Interest Expense	$ 270	$ 220	$ 706	$ 554
ESOP Loans [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	4.00%	3.30%	4.10%	3.20%
Cash Interest	$ 414	$ 274	$ 1,147	$ 805
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	29	18	94	53
Total Interest Expense	$ 443	$ 292	$ 1,241	$ 858
Capital lease - real estate [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	5.40%	5.40%	5.40%	5.40%
Cash Interest	$ 72	$ 87	$ 227	$ 270
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	7	6	19	19
Total Interest Expense	79	93	246	289
Non U.S. lines of credit [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	113	367	309	723
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	75	23	85	69
Total Interest Expense	188	390	394	792
Non U.S. term loans [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	228	276	840	832
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	38	53	97	79
Total Interest Expense	266	329	937	911
Other long term debt [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	85	97	247	195
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	1	0	7	0
Total Interest Expense	86	97	254	195
Capitalized interest [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	417	443	1,441	717
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	0	0	0	5
Total Interest Expense	$ 417	$ 443	$ 1,441	$ 712