INCOME TAXES (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of income tax computed at the U.S. federal statutory tax rate to income tax expense
Tax expense at U.S. statutory rate	$ 25,169	$ 31,294	$ 13,920
State income taxes, net of federal tax effect	(34)	111	120
Nondeductible expenses	1,555	1,319	1,609
Change in reserve for tax contingencies	(1,192)	(601)	(673)
Impact of goodwill impairment loss			10,046
Change in deferred tax asset valuation allowance	38,284	3,109	5,161
Foreign earnings taxes at less than statutory rate	(11,924)	(12,783)	(7,521)
Tax credits generated in the current year	(1,696)	(2,772)	(4,319)
Reinstatement of federal research and development credit	(1,247)		(1,937)
Manufacturing deduction			(1,333)
Other	82	154	(571)
Provision for income taxes	48,997	19,831	14,502
Net changes in the liability for unrecognized tax benefits
Balance at the beginning of the period	7,306	8,441
Increase (decrease) related to tax positions in prior years:
Recognition of benefits from expiration of statutes	(1,068)	(973)
Settlements with taxing authorities		(728)
Other	3,125	(54)
Tax positions related to the current year	472	743
Tax positions related to current year acquisitions	2,784
Currency translation adjustment		(123)
Balance at the end of the period	12,619	7,306	8,441
Unrecognized tax benefits from permanent tax adjustments that, if recognized, would affect the effective rate	4,500	4,700
Unrecognized tax benefits related to settlements with taxing authorities	3,700
Interest and penalties accrued	1,200	1,600
Total liability for uncertain tax issues	10,900	8,000
Cash amounts paid for income taxes, net of refunds received	$ 15,200	$ 27,300	$ 42,100