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Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Earnings Per Share Basic [Line Items]
Net income	$ 36,803	$ 11,136	$ 58,349	$ 6,525
Weighted-average shares of common stock outstanding:
Basic	21,746	21,252	21,582	21,200
Dilutive effect of common stock equivalents arising from share option, nonvested share and nonvested share unit awards	847	106	925	156
Diluted	22,593	21,358	22,507	21,356
Basic earnings per share	$ 1.69	$ 0.52	$ 2.70	$ 0.31
Diluted earnings per share	$ 1.63	$ 0.52	$ 2.59	$ 0.31
Share Option Awards [Member]
Weighted-average shares of common stock outstanding:
Antidilutive shares/unit awards excluded from diluted calculation		778	12	694
Nonvested Share Awards and Nonvested Share Unit Awards [Member]
Weighted-average shares of common stock outstanding:
Antidilutive shares/unit awards excluded from diluted calculation	4	315	2	359

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