WARRANTY LIABILITY (Details) - Summary of Changes in Warrant Liability Included in Accrued Liabilities (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance, beginning of period	$ 7,111	$ 7,424	$ 6,649	$ 8,856
Warranties issued and changes in estimated pre-existing warranties	576	1,309	2,677	1,965
Actual warranty costs incurred	(1,199)	(1,342)	(2,838)	(3,430)
Balance, end of period	$ 6,488	$ 7,391	$ 6,488	$ 7,391