Goodwill and Intangible Assets - Aggregated Amortization Expense for Our Purchased Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Dec. 30, 2012	Jan. 01, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 994	$ 1,271	$ 3,155	$ 3,801