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Deposits (Tables)
12 Months Ended
Dec. 31, 2017
Deposits [Abstract]  
Schedule of detail in deposit accounts
   
December 31,
(dollars in thousands)     2017     2016
Noninterest bearing$295,680235,538
Interest bearing:
NOW accounts229,945234,949
Money market accounts545,029345,117
Savings16,29814,942
Time, less than $100,00055,46148,638
Time, $100,000 and over238,710211,967
Total deposits$1,381,1231,091,151
Scheduled maturities of certificates of deposit
    
(dollars in thousands)
2018     $213,562
201954,669
202016,702
20211,207
2022 and after8,031
$294,171