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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (Parentheticals) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Statement of Comprehensive Income [Abstract]        
Unrealized Gain (Loss) on Available-for-Sale Securities, tax benefit (expense) $ (331) $ 4 $ (255) $ (1)
Pension and Other Postretirement Benefits, net of tax benefit (expense) $ 11 $ (108) $ 47 $ (90)