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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Statement of Comprehensive Income [Abstract]        
Unrealized appreciation (depreciation) on available-for-sale securities, tax $ 744 $ 645 $ 1,524 $ 985
Reclassification adjustment for realized gains included in net income, Tax 52 0 52 0
Postretirement health plan amortization of transition obligation and prior service cost and change in net loss, tax $ 0 $ 4 $ 1 $ 6