LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	$ (11,641)	$ (10,678)	$ (23,099)	$ (21,030)
Amort. Debt Discount	(258)	(1,079)	(1,383)	(2,127)
Amort. Deferred Cost & Other Fees	746	635	1,536	1,258
Total Interest Expense	$ (12,645)	$ (12,392)	$ (26,018)	$ (24,415)
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	$ (9,515)	$ (7,875)	$ (19,031)	$ (15,750)
Amort. Debt Discount	(68)	0	(135)	0
Amort. Deferred Cost & Other Fees	461	323	934	645
Total Interest Expense	(10,044)	(8,198)	(20,100)	(16,395)
Revolver due 2019 [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	(1,326)	(954)	(1,651)	(1,525)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	150	122	282	237
Total Interest Expense	(1,476)	$ (1,076)	$ (1,933)	$ (1,762)
Convert. debt due 2017 [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate		9.20%	8.90%	9.00%
Cash Interest	(167)	$ (1,000)	$ (1,167)	$ (2,000)
Amort. Debt Discount	(190)	(1,079)	(1,248)	(2,127)
Amort. Deferred Cost & Other Fees	37	111	148	222
Total Interest Expense	$ (394)	$ (2,190)	$ (2,563)	$ (4,349)
Real estate mortgages [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	2.60%	2.20%	2.40%	2.10%
Cash Interest	$ (229)	$ (154)	$ (416)	$ (305)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	18	17	20	29
Total Interest Expense	$ (247)	$ (171)	$ (436)	$ (334)
ESOP Loans [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Effective Interest Rate	4.00%	3.30%	4.10%	3.10%
Cash Interest	$ (369)	$ (275)	$ (733)	$ (531)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	38	17	65	35
Total Interest Expense	$ (407)	$ (292)	$ (798)	$ (566)
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	$ (75)	$ (90)	$ (155)	$ (183)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	6	7	12	13
Total Interest Expense	(81)	(97)	(167)	(196)
Non U.S. lines of credit [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	(61)	(97)	(196)	(356)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	7	22	10	46
Total Interest Expense	(68)	(119)	(206)	(402)
Non U.S. term loans [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	(308)	(272)	(612)	(556)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	25	13	59	26
Total Interest Expense	(333)	(285)	(671)	(582)
Other long term debt [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	(88)	(79)	(162)	(98)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	4	0	6	0
Total Interest Expense	(92)	(79)	(168)	(98)
Capitalized interest [Member]
LONG-TERM DEBT (Details) - Summary of Interest Expense Incurred [Line Items]
Cash Interest	(497)	(118)	(1,024)	(274)
Amort. Debt Discount	0	0	0	0
Amort. Deferred Cost & Other Fees	0	3	0	5
Total Interest Expense	$ (497)	$ (115)	$ (1,024)	$ (269)