Lease Financing Obligations - Amortization Expense Related to Design Tools Recorded Using Straight-Line Method Over Remaining Useful Life for Periods (Detail) (Design Tools [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Dec. 30, 2012	Jan. 01, 2012
Design Tools [Member]
Lease Financing Obligations [Line Items]
Amortization expense	$ 818	$ 992	$ 2,659	$ 2,780