ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Accounts Payable and Accrued Liabilities, Current [Abstract]
Payroll, bonus, accrued time off and other employee benefits	$ 26,733	$ 43,219
Outside services	11,173	11,826
Restructuring and severance	7,550	8,277
Deferred revenue	6,598	1,566
Warranties	3,193	2,472
Licenses	2,951	1,688
Income taxes	3,068	1,036
Commissions	2,231	2,900
Interest	1,485	1,720
Other	5,495	5,520
Accrued liabilities	$ 70,477	$ 80,224