OTHER INCOME (EXPENSE), NET (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Other Income (Expense) Net [Line Items]
Total other income (expense), net	$ (681)	$ (864)	$ 97	$ 104	$ (829)	$ (281)	$ 683	$ (891)	$ (1,344)	$ (1,318)	$ (501)
Interest Income [Member]
Other Income (Expense) Net [Line Items]
Total other income (expense), net									146	238	228
Other Income (Expense) Net [Member]
Other Income (Expense) Net [Line Items]
Total other income (expense), net									$ (1,490)	$ (1,556)	$ (729)