Employee Benefit Plans - Schedule of Option Activity under 2003 Incentive Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015	Dec. 26, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, Shares, Beginning balance	136,459	315,648	853,551
Exercised, Shares	(113,362)	(101,700)	(339,303)
Cancelled, Shares	(13,825)	(77,489)	(198,600)
Outstanding, Shares, Ending balance	9,272	136,459	315,648	853,551
Options exercisable and expected to vest, Shares	9,272
Weighted Average Exercise Price, Outstanding, Beginning balance	$ 13.15	$ 10.02	$ 8.87
Exercised, Weighted Average Exercise Price	13.96	3.91	0
Canceled, Weighted Average Exercise Price	14.56	12.54	0
Weighted Average Exercise Price, Outstanding, Ending balance	1.17	$ 13.15	$ 10.02	$ 8.87
Options exercisable and expected to vest, Weighted Average Exercise Price	$ 1.17
Weighted Average Remaining Contractual Life, Outstanding	1 year 2 months 26 days	6 months 25 days	2 years 21 days	1 year 4 months 6 days
Weighted Average Remaining Contractual Life, Options exercisable and expected to vest	1 year 2 months 26 days
Aggregate Intrinsic Value, Outstanding, Beginning balance	$ 203	$ 135	$ 216	$ 1,798
Aggregate Intrinsic Value, Options exercisable and expected to vest	$ 203