Components of Comprehensive Income (Loss) (Detail) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Comprehensive Income (Loss) [Line Items]
Net income (loss)	$ 41,621	$ (1,530)	$ 43,347	$ (21,204)
Other comprehensive income (loss):
Foreign currency translation adjustment	6,148	(19,488)	22,893	(31,510)
Unrealized (loss) gain on cash flow hedge derivatives	(465)	690	54	2,228
Unrealized gain on marketable securities, net	28		26
Recognition of pension loss amortization	9		139
Other comprehensive income (loss)	5,720	(18,798)	23,112	(29,282)
Comprehensive income (loss)	$ 47,341	$ (20,328)	$ 66,459	$ (50,486)