ACCOUNTS RECEIVABLE (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2013	Sep. 30, 2012
ACCOUNTS RECEIVABLE [Abstract]
Accounts receivable, less allowance for doubtful accounts		$ 51,220	$ 53,506
Increase In Allowance For Doubtful Accounts	3,727
Balance as of September 30, 2012		4,757
Amounts charged to expense		36
Deductions and adjustments		(732)
Balance as of March 31, 2013		$ 4,061