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Employee Benefit Plans - Deferred Compensation Agreement (Details) - USD ($)
12 Months Ended
Mar. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Deferred Compensation Agreement      
Deferred Compensation Arrangement with Individual, Compensation Expense     $ 187,000
Deferred Compensation Agreement      
Deferred Compensation Agreement      
Payments deferred (in years)   10 years  
Split Dollar Life Insurance      
Deferred Compensation Agreement      
Beneficiary amount of death proceeds $ 700,000