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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Statement of Comprehensive Income [Abstract] |  |
Unrealized appreciation on available-for-sale securities, net of taxes | $ 684 | $ 1,875
Reclassification adjustment for realized gains (losses) included in net income, tax | (32) | (20)
Change in postretirement health plan gains and losses, net of taxes | $ 0 | $ 0

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