Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 29, 2018	$ 727,623	$ 330	$ 47,861	$ 679,432
Beginning Balance, Shares at Dec. 29, 2018		33,004,861
Exercise of stock options	123		123
Exercise of stock options, shares		14,227
Compensation expense under Incentive Stock Plan	3,077		3,077
Purchase and cancellation of common stock	(41,339)	$ (5)	(939)	(40,395)
Purchase and cancellation of common stock, Shares		(521,944)
Issuance of non-vested stock, net of cancellations	1,377	$ 1	1,376
Issuance of non-vested stock, net of cancellations, Shares		69,826
Other stock related activity, net of tax	(1,039)		1,107	(2,146)
Other stock related activity, net of tax, Shares		(10,707)
Net income	83,762			83,762
Ending Balance at Dec. 28, 2019	773,584	$ 326	52,605	720,653
Ending Balance, Shares at Dec. 28, 2019		32,556,263
Exercise of stock options	1,184		1,184
Exercise of stock options, shares		27,787
Compensation expense under Incentive Stock Plan	7,586		7,586
Purchase and cancellation of common stock	(38,676)	$ (5)	(833)	(37,838)
Purchase and cancellation of common stock, Shares		(462,635)
Issuance of non-vested stock, net of cancellations	3,463	$ 1	3,462
Issuance of non-vested stock, net of cancellations, Shares		53,572
Other stock related activity, net of tax	(452)		81	(533)
Other stock related activity, net of tax, Shares		(6,247)
Net income	106,870			106,870
Ending Balance at Dec. 26, 2020	$ 853,559	$ 322	64,085	789,152
Ending Balance, Shares at Dec. 26, 2020	32,168,740	32,168,740
Exercise of stock options	$ 2,455		2,455
Exercise of stock options, shares		41,700
Compensation expense under Incentive Stock Plan	8,228		8,228
Purchase and cancellation of common stock	(62,756)	$ (6)	(1,111)	(61,639)
Purchase and cancellation of common stock, Shares		(617,080)
Issuance of non-vested stock, net of cancellations	3,261		3,261
Issuance of non-vested stock, net of cancellations, Shares		28,914
Other stock related activity, net of tax	(2,103)		533	(2,636)
Other stock related activity, net of tax, Shares		(14,765)
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, Shares at Dec. 25, 2021	31,607,509	31,607,509