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Transactions With Related Parties (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
	Mar. 05, 2020	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Related Party Transaction [Line Items]
Total cost		$ 5,283	$ 1,204	$ 11,298
Director [Member]
Related Party Transaction [Line Items]
Repurchase of common stock		28
Total cost		$ 500
Purchase price per share		$ 16.25
Director [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Repurchase of common stock	37
Total cost	$ 700
Purchase price per share	$ 17.43
Director and CFO [Member]
Related Party Transaction [Line Items]
Repurchase of common stock			53
Total cost			$ 1,000
Purchase price per share			$ 18.33
Chief Executive Officer, Chief Operating Officer and Chief Financial Officer [Member] | Restricted Stock Units (RSUs) [Member]
Related Party Transaction [Line Items]
Purchase of shares to cover withholding taxes			73
Value of purchased shares to cover withholding taxes			$ 1,300

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