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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Statement of Comprehensive Income [Abstract]    
Unrealized gains or losses on available-for-sale securities, tax impact $ 394 $ 0
Reclassification adjustments to net income resulting from realized gains or losses on sale of securities $ 0 $ 0