Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock, At Cost [Member]
Beginning Balance at Dec. 29, 2019	$ 180,372		$ 252	$ 120,054	$ 102,593	$ (42,527)
Beginning Balance, Shares at Dec. 29, 2019		21,664,076
Net income	55,940				55,940
Dividends on common stock	(5,460)				(5,460)
Issuance of nonvested share awards			3	(3)
Issuance of nonvested share awards, Shares		321,600
Exercise of share option awards	169			169
Exercise of share option awards, Shares		31,600
Share-based compensation	1,714			1,714
Forfeiture of nonvested share awards, Shares		(22,375)
Retirement of common stock for payment of withholding tax	(97)			(97)
Retirement of common stock for payment of withholding tax, Shares		(64,573)
Ending Balance at Jan. 03, 2021	232,638		255	121,837	153,073	(42,527)
Ending Balance, shares at Jan. 03, 2021		21,930,328
Net income	102,386				102,386
Dividends on common stock	(63,198)				(63,198)
Issuance of nonvested share awards			2	(2)
Issuance of nonvested share awards, Shares		248,550
Exercise of share option awards	2,165		3	2,162
Exercise of share option awards, Shares		369,765
Share-based compensation	1,958			1,958
Forfeiture of nonvested share awards, Shares		(19,625)
Retirement of common stock for payment of withholding tax	(1,046)			(1,046)
Retirement of common stock for payment of withholding tax, Shares		(70,228)
Purchases of treasury stock	(7,594)					(7,594)
Purchases of treasury stock, Shares		(361,323)
Ending Balance at Jan. 02, 2022	267,309		260	124,909	192,261	(50,121)
Ending Balance, shares at Jan. 02, 2022		22,097,467
Net income	26,134				26,134
Dividends on common stock	(22,130)				(22,130)
Issuance of nonvested share awards			2	(2)
Issuance of nonvested share awards, Shares		284,630
Conversion of vested share unit awards			1	(1)
Conversion of vested share unit awards, Shares		124,012
Exercise of share option awards	$ 349		1	348
Exercise of share option awards, Shares	83,400	83,400
Share-based compensation	$ 2,470			2,470
Forfeiture of nonvested share awards, Shares		(31,955)
Retirement of common stock for payment of withholding tax	$ (1,212)			(1,212)
Retirement of common stock for payment of withholding tax, Shares	(77,340)	(77,340)
Purchases of treasury stock	$ (4,136)					(4,136)
Purchases of treasury stock, Shares		(295,719)
Ending Balance at Jan. 01, 2023	$ 268,784		$ 264	$ 126,512	$ 196,265	$ (54,257)
Ending Balance, shares at Jan. 01, 2023		22,184,495