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Revenue Recognition (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Asset Management Services [Member]    
Trust and Estate fees recognized $ 85,000 $ 90,000
Estate Management Services [Member]    
Trust and Estate fees recognized $ 28,000 $ 9,000
Percentage of total estate fee recognized when all estate assets are collected and debts paid 25.00%  
Percentage of total estate fee recognized when the inheritance tax return is filed 50.00%  
Percentage of total estate fee recognized when the first and final account is confirmed 25.00%