Quarterly Financial Information (Unaudited Supplemental Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2022	Sep. 30, 2022	Jul. 01, 2022	Apr. 01, 2022	Dec. 31, 2021	Oct. 01, 2021	Jul. 02, 2021	Apr. 02, 2021	Dec. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Total revenue	$ 70,117	$ 72,033	$ 75,928	$ 75,664	$ 70,232	$ 71,894	$ 73,197	$ 63,486	$ 293,742	$ 278,809	$ 239,482
Operating income	13,623	14,035	14,181	13,409	12,001	11,405	14,217	8,853	55,248	46,476	8,642
Income from continuing operations before income taxes	13,549	14,021	14,153	13,381	11,982	11,379	14,192	8,828	55,104	46,381	8,516
Income (loss) from discontinued operations								(7)
Net income	$ 9,716	$ 10,366	$ 10,215	$ 10,505	$ 16,521	$ 8,131	$ 10,532	$ 6,361	$ 40,802	$ 41,545	$ 5,473
Basic net income per common share:
Income (loss) per common share from continuing operations					$ 0.55	$ 0.27	$ 0.35	$ 0.21	$ 1.30	$ 1.38	$ 0.19
Loss per common share from discontinued operations									0.00	0.00	(0.01)
Basic net income per common share	$ 0.32	$ 0.33	$ 0.32	$ 0.33	0.55	0.27	0.35	0.21	1.30	1.38	0.18
Diluted net income per common share:
Income (loss) per common share from continuing operations					0.50	0.25	0.32	0.19	1.28	1.26	0.17
Loss per common share from discontinued operations									0.00	0.00	0.00
Diluted net income per common share	$ 0.31	$ 0.32	$ 0.32	$ 0.33	$ 0.50	$ 0.25	$ 0.32	$ 0.19	$ 1.28	$ 1.26	$ 0.17