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10. Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Rental Payments for Operating Leases
(Dollars in thousands)    
     
Year ending December 31,    
2016     664
2017     550
2018     501
2019     490
2020     422
Thereafter     1,548
Total minimum obligation   $ 4,175
Financial instruments with credit risk
(Dollars in thousands)          
    Contractual Amount
    2015     2014
Financial instruments whose contract amount represent credit risk:          
           
Commitments to extend credit   $ 189,351       168,733
               
Standby letters of credit and financial guarantees written   $ 3,872       3,911