Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Dec. 30, 2012	Jan. 01, 2012
Income Tax Disclosure [Line Items]
Provision for (benefit from) income taxes	$ (1,346,000)	$ (169,000)	$ (1,324,000)	$ 3,000
Release of reserve for uncertain tax position			1,300,000
Decrease in unrecognized tax benefits	1,200,000		1,100,000
Unrecognized tax benefits	15,700,000		15,700,000
Unrecognized tax benefits (net of federal benefit)	$ 13,100,000		$ 13,100,000