Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Taxes [Line Items]
Income tax provision	$ 985,000	$ 3,300,000	$ 626,000	$ 5,323,000
Tax benefit driven by reductions in uncertain tax positions as a result of lapse in statutes of limitation			1,400,000
Income tax provision (benefit), sale of the contract manufacturing business		2,400,000		2,400,000
Anticipated unrecognized tax benefit reduction during next twelve months	$ 2,500,000		$ 2,500,000