Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance, at Dec. 29, 2018	$ 9,949	$ 1,163,545	$ 262	$ (150,857)	$ 1,022,899
Balance, shares at Dec. 29, 2018	33,047,807			6,149,364
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		67,983			67,983
Other comprehensive income (loss), net of reclassification adjustments and tax			1,218		1,218
Dividends paid		(33,354)			(33,354)
Balance, at Dec. 28, 2019	$ 9,949	1,198,173	1,480	$ (150,857)	1,058,745
Balance, shares at Dec. 28, 2019	33,047,807			6,149,364
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		118,917			118,917
Other comprehensive income (loss), net of reclassification adjustments and tax			1,806		1,806
Dividends paid		(33,354)			(33,354)
Balance, at Dec. 26, 2020	$ 9,949	1,283,737	3,286	$ (150,857)	1,146,115
Balance, shares at Dec. 26, 2020	33,047,807			6,149,364
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		108,849			108,849
Other comprehensive income (loss), net of reclassification adjustments and tax			(1,599)		(1,599)
Dividends paid		(33,623)			(33,623)
Balance, at Dec. 25, 2021	$ 9,949	$ 1,358,963	$ 1,687	$ (150,857)	$ 1,219,742
Balance, shares at Dec. 25, 2021	33,047,807			6,149,364