Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 28, 2019		32,556,263
Beginning balance at Dec. 28, 2019	$ 773,584	$ 326	$ 52,605	$ 720,653
Exercise of stock options (in shares)		27,787
Exercise of stock options	1,184		1,184
Compensation expense under incentive stock plan	7,586		7,586
Purchase and cancellation of common stock (in shares)		(462,635)
Purchase and cancellation of common stock	(38,676)	$ (5)	(833)	(37,838)
Issuance of non-vested stock, net of cancellations (in shares)		53,572
Issuance of non-vested stock, net of cancellations	3,463	$ 1	3,462
Other stock related activity, net of tax (in shares)		(6,247)
Other stock-related activity, net of tax	(452)		81	(533)
Net income	106,870			106,870
Ending balance at Dec. 26, 2020	853,559	$ 322	64,085	789,152	$ 0
Ending balance (in shares) at Dec. 26, 2020		32,168,740
Exercise of stock options (in shares)		41,700
Exercise of stock options	2,455		2,455
Compensation expense under incentive stock plan	8,228		8,228
Purchase and cancellation of common stock (in shares)		(617,080)
Purchase and cancellation of common stock	(62,756)	$ (6)	(1,111)	(61,639)
Issuance of non-vested stock, net of cancellations (in shares)		28,914
Issuance of non-vested stock, net of cancellations	3,261		3,261
Other stock related activity, net of tax (in shares)		(14,765)
Other stock-related activity, net of tax	(2,103)		533	(2,636)
Other comprehensive loss	(1,440)				(1,440)
Net income	131,532			131,532
Ending balance at Dec. 25, 2021	$ 932,736	$ 316	77,451	856,409	(1,440)
Ending balance (in shares) at Dec. 25, 2021	31,607,509	31,607,509
Exercise of stock options (in shares)		18,515
Exercise of stock options	$ 1,046		1,046
Compensation expense under incentive stock plan	9,370		9,370
Purchase and cancellation of common stock (in shares)		(203,765)
Purchase and cancellation of common stock	(19,934)	$ (2)	(367)	(19,565)
Issuance of non-vested stock, net of cancellations (in shares)		27,224
Issuance of non-vested stock, net of cancellations	2,032		2,032
Other stock related activity, net of tax (in shares)		(18,851)
Other stock-related activity, net of tax	(2,305)		(782)	(1,523)
Other comprehensive loss	(1,863)				(1,863)
Net income	121,549			121,549
Ending balance at Dec. 31, 2022	$ 1,042,631	$ 314	$ 88,750	$ 956,870	$ (3,303)
Ending balance (in shares) at Dec. 31, 2022	31,430,632	31,430,632