Stock-Based Compensation Arrangements - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		2,375,533		2,375,533		1,987,331
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price		$ 8.84		$ 8.84		$ 8.87	[1]
ShareBasedCompensationArrangementbyShareBasedPaymentAwarad,Options,Outstanding,WeightedAverageRemainingContractualLife				5 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 3,013		$ 3,013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				4 years 2 months 1 day
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price				$ 8.86
Tax benefit related to the accelerated vesting of restricted stock awards		$ 0	$ 0	$ 15	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price		$ 9.02		$ 9.02
ShareBasedCompensationArrangementbyShareBasedPaymentAward,Options,ExpectedtoVest,WeightedAverageRemainingContractualTerm				6 years 2 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value		$ 1,739		$ 1,739
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares				(36,783)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	[1]			$ 10.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number		1,599,290		1,599,290
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options		598,545		598,545
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price		$ 8.30		$ 8.30
ShareBasedCompensationArrangementbyShareBasedPaymentAward,Options,Exercisable,WeightedAverageRemainingContractualLife				4 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value		$ 1,080		$ 1,080
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (shares)				424,985

[1] The weighted average exercise price reflects the original grant date fair value per option as adjusted for the dividend payment made in August 2015.