Deferred Stock Activity (Detail) - Deferred stock $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 10, 2015 USD ($) $ / shares shares
Number of Shares
Number of Shares, Balance at beginning of period | shares	151
Number of Shares, Vested | shares	(54)
Number of Shares, Granted | shares	70
Number of shares, Balance at end of period | shares	167
Weighted Average Fair Value
Weighted Average Fair Value, Balance at beginning of period	$ 21.06
Weighted Average Fair Value, Vested	20.94
Weighted Average Fair Value, Initial grant	21.59
Weighted Average Fair Value, Balance at end of period	$ 21.29
Weighted Average Remaining Contractual Term (Years), Outstanding unvested at end of period	11 months 12 days
Aggregate Intrinsic Value, Outstanding unvested at end of period | $	$ 4,346