Employee Benefit Plans (Detail) (USD $)	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation plan assets, noncurrent	$ 13,600,000
Deferred compensation liability classified, noncurrent	12,775,000
401(k) Plan employer matching contribution, percentage	1.50%	1.50%	0.00%
Costs of 401(k) Plan	630,000	550,000	0
As Restated [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation plan assets, noncurrent		11,400,000
Deferred compensation liability classified, noncurrent		10,793,000
United Kingdom Subsidiary [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of pension plan participants	12
Pension expense	$ 154,000	$ 268,000	$ 258,000