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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Adjustment For Actuarially Determined Liabilities        
Other comprehensive income, tax expense $ (48) $ (48) $ (96) $ (96)