CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Balance, value at Jan. 02, 2021	$ 735,049	$ 491,819	$ (2,276)	$ 245,506
Balance, shares at Jan. 02, 2021		35,851
Net earnings	19,516			19,516
Other comprehensive income	57		57
Dividends	(7,238)			(7,238)
Stock-based employee compensation	4,185	$ 4,185
Stock warrant	645	645
Issuances of common stock for stock bonus plan and associate stock purchase plan	385	$ 385
Issuances of common stock for stock bonus plan and associate stock purchase plan, shares		21
Issuances of restricted stock, shares		523
Cancellations of stock-based awards, value	(2,079)	$ (2,079)
Cancellations of stock-based awards, shares		(129)
Balance, value at Apr. 24, 2021	750,520	$ 494,955	(2,219)	257,784
Balance, shares at Apr. 24, 2021		36,266
Balance, value at Jan. 01, 2022	$ 782,869	$ 493,783	(1,455)	290,541
Balance, shares at Jan. 01, 2022	35,948	35,948
Net earnings	$ 19,289			19,289
Other comprehensive income	23		23
Dividends	(7,665)			(7,665)
Stock-based employee compensation	4,295	$ 4,295
Stock warrant	673	673
Issuances of common stock for stock bonus plan and associate stock purchase plan	108	$ 108
Issuances of common stock for stock bonus plan and associate stock purchase plan, shares		3
Issuances of restricted stock, shares		369
Cancellations of stock-based awards, value	(4,288)	$ (4,288)
Cancellations of stock-based awards, shares		(180)
Balance, value at Apr. 23, 2022	$ 795,304	$ 494,571	$ (1,432)	$ 302,165
Balance, shares at Apr. 23, 2022	36,140	36,140