INCOME TAXES (Schedule of Components of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Current—domestic	$ 453	$ 773	$ 161
Deferred—domestic	(4,061)	(980)	(862)
Current—foreign	48,691	56,968	55,233
Deferred—foreign	1,314	(290)	45
Provision for income taxes	$ 46,397	$ 56,471	$ 54,577