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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (Parentheticals) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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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)

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