Related Party Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended		15 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jul. 01, 2012	Jul. 01, 2013
Related Party Transaction [Line Items]
Services Agreement advance written notice period for termination		30 days
Expenses related to Services Agreement	$ 1.2	$ 2.1	$ 2.0	$ 0.7
Secondary offering, shares		23,000,000
Registration Rights Agreement [Member]
Related Party Transaction [Line Items]
Secondary offering, shares			23,000,000
Offering cost incurred by company			$ 0.4