Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Earnings Per Share Basic [Line Items]
Net income	$ 24,131	$ 28,393	$ 82,480	$ 34,918
Weighted-average shares of common stock outstanding:
Basic	21,798,000	21,310,000	21,654,000	21,237,000
Dilutive effect of common stock equivalents arising from share option, nonvested share and nonvested share unit awards	736,000	415,000	871,000	227,000
Diluted	22,534,000	21,725,000	22,525,000	21,464,000
Basic earnings per share	$ 1.11	$ 1.33	$ 3.81	$ 1.64
Diluted earnings per share	$ 1.07	$ 1.31	$ 3.66	$ 1.63
Share Option Awards [Member]
Weighted-average shares of common stock outstanding:
Antidilutive shares/unit awards excluded from diluted calculation	0	268,000	0	700,000
Nonvested Share Awards and Nonvested Share Unit Awards [Member]
Weighted-average shares of common stock outstanding:
Antidilutive shares/unit awards excluded from diluted calculation	0	120,000	7,000	144,000