Restructuring and Other Charges Activity Related to Restructuring Accruals (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 1,552	$ 2,564	$ 1,412	$ 2,021
Expense	3,122	560	4,641	5,914
Utilization	(723)	(1,322)	(2,102)	(6,133)
Ending Balance	3,951	1,802	3,951	1,802
Facilities and Other
Restructuring Reserve [Roll Forward]
Beginning Balance	0	233	155	0
Expense	150	54	163	744
Utilization	(58)	(80)	(226)	(537)
Ending Balance	92	207	92	207
Workforce-related
Restructuring Reserve [Roll Forward]
Beginning Balance	1,552	2,331	1,257	2,021
Expense	2,972	506	4,478	5,170
Utilization	(665)	(1,242)	(1,876)	(5,596)
Ending Balance	$ 3,859	$ 1,595	$ 3,859	$ 1,595