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Revenue Recognition (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]        
Investment and trust services fees $ 1,482 $ 1,424 $ 4,582 $ 4,285
Estate management services Fees recognition period     18 months  
Asset Management Fees [Member]        
Disaggregation of Revenue [Line Items]        
Investment and trust services fees 1,300   $ 4,100 3,800
Estate Management Services Fees [Member]        
Disaggregation of Revenue [Line Items]        
Investment and trust services fees 105 86 259 228
Commisions [Member]        
Disaggregation of Revenue [Line Items]        
Investment and trust services fees $ 42 $ 75 $ 177 $ 218