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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Statement [Abstract]        
Tax effect on pension liability $ 0 $ 53 $ 0 $ 53
Unrealized gain (loss) on sale of investments, net $ (28) $ (126) $ (179) $ (26)