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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Statement Of Stockholders Equity [Abstract]    
Adjustment related to unrealized gains (losses) on available-for-sale securities income tax effects $ 2,231 $ 2,807