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5. Time Deposits (Tables)
 12 Months Ended
Dec. 31, 2018
Banking and Thrift [Abstract]  
Scheduled maturities of time deposits
(Dollars in thousands)   
    
 2019   $61,723 
 2020    21,566 
 2021    14,121 
 2022    2,618 
 2023 and thereafter    3,145 
        
 Total   $103,173