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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (Parentheticals) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of Comprehensive Income [Abstract]        
Unrealized Gain (Loss) on Available-for-Sale Securities, tax benefit (expense) $ 71 $ 16 $ 74 $ (5)
Pension and Other Postretirement Benefits, net of tax benefit $ 10 $ 9 $ 36 $ 19