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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Statement [Abstract]      
Unrealized gain (loss) on investment, taxes $ 68 $ 247 $ 43
Adjustment to pension benefit plans, taxes $ 264 $ (324) $ 22