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Employee Benefits - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]          
Service costs included in net periodic pension expense     $ 0    
Expected long-term rate of return on plan assets     2.42%   3.45%
Settlement Charge $ 177,000 $ 0 $ 926,000 $ 0  
Fixed Income Funds          
Defined Benefit Plan Disclosure [Line Items]          
Target allocation (as a percentage) 90.00%   90.00%    
Equity Securities          
Defined Benefit Plan Disclosure [Line Items]          
Target allocation (as a percentage) 10.00%   10.00%