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Benefit Plans - Defined Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Split-Dollar Life Insurance Benefit Plan - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Amounts Recognized in Accumulated Other Comprehensive Loss    
Net actuarial loss $ 3,847 $ 3,776
Prior transition obligation 992 1,059
Accumulated other comprehensive loss $ 4,839 $ 4,835