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Commitments, Contingencies, and Credit Risk - Operating Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]    
Rent expense $ 320 $ 310
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]    
2017 315  
2018 266  
2019 154  
2020 0  
Total $ 735