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10. Commitments and Contingencies (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Commitments and contingencies
Commitments to extend credit    
Commitments and contingencies 195,528 189,351
Standby letters of credit and financial guarantees written    
Commitments and contingencies $ 3,728 $ 3,872