ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Accounts Payable and Accrued Liabilities, Current [Abstract]
Payroll and benefits	$ 23,246	$ 43,219
Outside services	12,563	11,826
Restructuring and severance	8,737	8,277
Income taxes	3,475	1,036
Licenses	3,107	1,688
Warranties	2,686	2,472
Deferred revenue	2,385	1,566
Commissions	2,352	2,900
Interest	1,594	1,720
Other	5,454	5,520
Accrued liabilities	$ 65,599	$ 80,224