Consolidated Statements Of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Dec. 26, 2020	Dec. 28, 2019
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Common stock cash dividends per share	$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.22
Pension liability adjustment - pre-tax	$ (226)			$ (118)			$ (679)	$ (353)

Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive (income) loss for defined benefit plan, attributable to parent entity.

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