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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 15, 2016
Aug. 15, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2006
Aug. 26, 1999
Feb. 12, 1996
Related Party Transaction [Line Items]                
Unfunded commitments     $ 1 $ 69        
Deposits from related parties     150,373 68,612        
Aviation Time Sharing Agreement                
Related Party Transaction [Line Items]                
Payments to related party     313 57        
Initial Public Offering                
Related Party Transaction [Line Items]                
Repayments of subordinated debt $ 10,075 $ 10,075            
Certain Executive Officers and Directors and Their Associates                
Related Party Transaction [Line Items]                
Unfunded commitments     6,838 4,128        
Shareholders                
Related Party Transaction [Line Items]                
Unamortized leasehold improvements     158 180        
Lease expense     522 503 $ 502      
Paid for management consulting services       $ 306 306      
Ownership percentage held by shareholder       100.00%        
Subordinated debt           $ 6,000 $ 3,300 $ 775
Payment of interest     230 $ 211 $ 237      
Director                
Related Party Transaction [Line Items]                
Amount of investment held by the company     1,145 1,472        
Capital distributions received     $ 327 $ 0