Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [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	31		31
Exercise of stock options, shares		11,714
Compensation expense under Incentive Stock Plan	915		915
Purchase and cancellation of common stock	(9,635)	$ (1)	(207)	(9,427)
Purchase and cancellation of common stock, Shares		(115,090)
Issuance of non-vested stock, net of cancellations, Shares		48,193
Other stock related activity, net of tax	(634)		1,290	(1,924)
Other stock related activity, net of tax, Shares		(7,665)
Net income	23,407			23,407
Ending Balance at Mar. 30, 2019	741,707	$ 329	49,890	691,488
Ending Balance, Shares at Mar. 30, 2019		32,942,013
Beginning Balance at Dec. 29, 2018	$ 727,623	$ 330	47,861	679,432
Beginning Balance, Shares at Dec. 29, 2018		33,004,861
Purchase and cancellation of common stock, Shares	(22,380)
Ending Balance at Dec. 28, 2019	$ 773,584	$ 326	52,605	720,653
Ending Balance, Shares at Dec. 28, 2019	32,558,168	32,556,263
Exercise of stock options, shares		10
Compensation expense under Incentive Stock Plan	$ 1,214		1,214
Purchase and cancellation of common stock	$ (5,780)	$ (1)	(175)	(5,604)
Purchase and cancellation of common stock, Shares	(4,730)	(96,709)
Issuance of non-vested stock, net of cancellations, Shares		(21,974)
Other stock related activity, net of tax	$ (418)		(190)	(228)
Other stock related activity, net of tax, Shares		(2,925)
Net income	22,775			22,775
Ending Balance at Mar. 28, 2020	$ 791,375	$ 325	$ 53,454	$ 737,596
Ending Balance, Shares at Mar. 28, 2020	32,434,665	32,434,665