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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (Parentheticals) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Statement of Comprehensive Income [Abstract]    
Unrealized Gain (Loss) on Available-for-Sale Securities, tax (expense) benefit $ (21) $ 61
Pension and Other Postretirement Benefit Plan, tax benefit $ 9 $ 67