Computation of Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jul. 03, 2020	Jul. 02, 2021	Jul. 03, 2020
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ 11,856	$ (100)	$ 19,840	$ (507)
Earnings from discontinued operations, net of tax	0	0	0	692
Net earnings (loss)	$ 11,856	$ (100)	$ 19,840	$ 185
Basic:
Weighted average number of shares outstanding (in shares)	27,867	27,659	27,841	27,734
Basic earnings per share from continuing operations	$ 0.43	$ (0.00)	$ 0.71	$ (0.02)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.00	0.00	0.00	0.03
Basic earnings per share (in usd per share)	$ 0.43	$ 0.00	$ 0.71	$ 0.01
Diluted:
Weighted average shares issuable on exercise of dilutive stock options (in shares)	46	0	49	0
Diluted (in shares)	27,913	27,659	27,890	27,734
Diluted earnings per share from continuing operations	$ 0.42	$ (0.00)	$ 0.71	$ (0.02)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.00	0.00	0.00	0.03
Diluted earnings per share (in usd per share)	$ 0.42	$ 0.00	$ 0.71	$ 0.01