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Troubled Debt Restructurings (Details)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
USD ($)
Investment
Jun. 30, 2016
USD ($)
Investment
Summary of concession at the time of modification and the recorded investment in TDRs before and after their modification    
Renewals deemed a concession 1 3
Reduced or deferred payments 1
Converted to interest only
Maturity date extensions
Total number of loans 2 3
Pre-modification outstanding recorded investment | $ $ 378 $ 2,491
Post-modification outstanding recorded investment | $ $ 387 $ 2,495
Commercial [Member] | Business [Member]    
Summary of concession at the time of modification and the recorded investment in TDRs before and after their modification    
Renewals deemed a concession 1 1
Reduced or deferred payments 1
Converted to interest only
Maturity date extensions
Total number of loans 2 1
Pre-modification outstanding recorded investment | $ $ 378 $ 2,381
Post-modification outstanding recorded investment | $ $ 387 $ 2,381
Commercial [Member] | Other [Member]    
Summary of concession at the time of modification and the recorded investment in TDRs before and after their modification    
Renewals deemed a concession   2
Reduced or deferred payments  
Converted to interest only  
Maturity date extensions  
Total number of loans   2
Pre-modification outstanding recorded investment | $   $ 110
Post-modification outstanding recorded investment | $   $ 114