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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Recent Accounting Pronouncements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Accounting Policies [Abstract]
Beginning Balance	$ 3,745	$ 4,828	$ 4,771
Accounts Receivable, Credit Loss Expense (Reversal)	(27)	647	836
Accounts Receivable, Allowance for Credit Loss, Writeoff	(676)	(2,732)	(858)
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	212	1,002	79
Ending Balance	$ 3,254	$ 3,745	$ 4,828

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Amount of allowance for credit loss on accounts receivable.

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