COMMITMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Commitments
Sublease income	$ 300	$ 200	$ 200
Rental expense, net of sublease income	11,900	$ 12,000	$ 12,600
Future minimum payments, net of minimum sublease income, under noncancelable operating leases
2016	10,766
2017	9,335
2018	8,302
2019	6,463
2020	4,771
Thereafter	15,415
Total future minimum payments, net of minimum sublease income	$ 55,052
Maximum
Commitments
Term of lease	10 years