Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 26, 2020	$ 853,559	$ 322	$ 64,085	$ 789,152
Beginning Balance, Shares at Dec. 26, 2020		32,168,740
Exercise of stock options	909		909
Exercise of stock options, shares		19,606
Compensation expense under Incentive Stock Plan	6,212		6,212
Purchase and cancellation of common stock	(54,613)	$ (5)	(970)	(53,638)
Purchase and cancellation of common stock, Shares		(539,075)
Issuance of non-vested stock, net of cancellations	2,493		2,493
Issuance of non-vested stock, net of cancellations, Shares		19,984
Other stock-related activity, net of tax	(1,488)		596	(2,084)
Other stock related activity, net of tax, Shares		(10,552)
Net income	97,452			97,452
Ending Balance at Sep. 25, 2021	904,524	$ 317	73,325	830,882
Ending Balance, Shares at Sep. 25, 2021		31,658,703
Beginning Balance at Jun. 26, 2021	892,985	$ 319	71,947	820,719
Beginning Balance, Shares at Jun. 26, 2021		31,891,890
Exercise of stock options	173		173
Exercise of stock options, shares		2,260
Compensation expense under Incentive Stock Plan	1,721		1,721
Purchase and cancellation of common stock	(23,364)	$ (2)	(421)	(22,941)
Purchase and cancellation of common stock, Shares		(234,044)
Issuance of non-vested stock, net of cancellations, Shares		(537)
Other stock-related activity, net of tax	(95)		(95)
Other stock related activity, net of tax, Shares		(866)
Net income	33,104			33,104
Ending Balance at Sep. 25, 2021	904,524	$ 317	73,325	830,882
Ending Balance, Shares at Sep. 25, 2021		31,658,703
Beginning Balance at Dec. 25, 2021	$ 932,736	$ 316	77,451	856,409	$ (1,440)
Beginning Balance, Shares at Dec. 25, 2021	31,607,509	31,607,509
Exercise of stock options	$ 971		971
Exercise of stock options, shares		17,455
Compensation expense under Incentive Stock Plan	6,742		6,742
Purchase and cancellation of common stock	(19,717)	$ (2)	(362)	(19,353)
Purchase and cancellation of common stock, Shares		(201,135)
Issuance of non-vested stock, net of cancellations	1,189		1,189
Issuance of non-vested stock, net of cancellations, Shares		13,847
Other stock-related activity, net of tax	(2,178)		(617)	(1,561)
Other stock related activity, net of tax, Shares		(18,284)
Other comprehensive income	(2,415)				(2,415)
Net income	103,713			103,713
Ending Balance at Sep. 24, 2022	$ 1,021,041	$ 314	85,374	939,208	(3,855)
Ending Balance, Shares at Sep. 24, 2022	31,419,392	31,419,392
Beginning Balance at Jun. 25, 2022	$ 990,957	$ 314	82,192	910,194	(1,743)
Beginning Balance, Shares at Jun. 25, 2022		31,425,224
Exercise of stock options	14		14
Exercise of stock options, shares		169
Compensation expense under Incentive Stock Plan	2,472		2,472
Purchase and cancellation of common stock	(1,522)		(26)	(1,496)
Purchase and cancellation of common stock, Shares		(14,700)
Issuance of non-vested stock, net of cancellations	812		812
Issuance of non-vested stock, net of cancellations, Shares		9,626
Other stock-related activity, net of tax	(181)		(90)	(91)
Other stock related activity, net of tax, Shares		(927)
Other comprehensive income	(2,112)				(2,112)
Net income	30,601			30,601
Ending Balance at Sep. 24, 2022	$ 1,021,041	$ 314	$ 85,374	$ 939,208	$ (3,855)
Ending Balance, Shares at Sep. 24, 2022	31,419,392	31,419,392