INCOME TAXES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Tax Contingency [Line Items]
Tax credit carryforward	$ 2,500
Windfall tax benefits from stock option exercises	19,800
Undistributed earnings	2,700,000
Additional Income Tax Expense, Undistributed Foreign Earnings	560,000
Unrecognized tax benefits	13,775	$ 12,298
Reasonably possible amount of unrecognized tax benefits to be recognized in fiscal year	2,000
Other long-term liabilities [Member]
Income Tax Contingency [Line Items]
Estimated accrued interest and penalties	3,500
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards, Valuation Allowance	$ 38,600