Deferred Stock Activity (Detail) - Deferred Stock $ / shares in Units, $ in Thousands	4 Months Ended	9 Months Ended
	Apr. 18, 2020 $ / shares shares	Oct. 03, 2020 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Balance at beginning of period | shares	49,000	49,000
Shares, Vested | shares	(2,707)	(49,000)
Shares, Granted | shares		54,000
Shares, Balance at end of period | shares		54,000
Weighted Average Fair Value, Balance at beginning of period | $ / shares	$ 22.31	$ 22.31
Weighted Average Fair Value, Vested | $ / shares		22.31
Weighted Average Fair Value, Granted | $ / shares		23.15
Weighted Average Fair Value, Balance at end of period | $ / shares		$ 23.15
Weighted Average Remaining Contractual Term (Years)		8 months 8 days
Unrecognized compensation cost | $		$ 836