Deferred Stock Activity (Detail) - Deferred stock $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jul. 13, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Balance at beginning of period | shares	66
Shares, Vested | shares	(66)
Shares, Granted | shares	49
Shares, Balance at end of period | shares	49
Weighted Average Fair Value, Balance at beginning of period | $ / shares	$ 19.93
Weighted Average Fair Value, Vested | $ / shares	19.93
Weighted Average Fair Value, Granted | $ / shares	22.31
Weighted Average Fair Value, Balance at end of period | $ / shares	$ 22.31
Weighted Average Remaining Contractual Term (Years)	10 months 13 days
Aggregate Intrinsic Value | $	$ 1,092