XML 18 R7.htm IDEA: XBRL DOCUMENT v3.21.2
Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 25, 2021
Sep. 26, 2020
Statement Of Stockholders Equity [Abstract]        
Adjustment related to unrealized gains (losses) on available-for-sale securities income tax effects $ 609 $ 31 $ 2,918 $ 2,903
Dividends declared per share     $ 2.68 $ 2.44