Summary of Restructuring Accruals and Certain Facility Closures (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 1,732
Expense Additions	3,660
Cash Payments	(3,092)
Ending Balance	2,300
Facilities charges
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1,732
Cash Payments	(580)
Ending Balance	1,152
Employee separation
Restructuring Cost and Reserve [Line Items]
Expense Additions	3,660
Cash Payments	(2,512)
Ending Balance	$ 1,148