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Summary of Significant Accounting Policies (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
branch
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Significant Accounting Policies [Line Items]      
Number of full service offices | branch 20    
HTM transfers to AFS securities, fair value $ 0    
Real Estate - owner-occupied percentage minimum for collateral 50.00%    
Foreclosed assets $ 0    
Retained earnings 135,932,000   $ 120,294,000
Operating lease right-of-use assets $ 9,735,000    
Accounting Standards Update 2016-02 [Member]      
Significant Accounting Policies [Line Items]      
Operating lease right-of-use assets   $ 10,000,000  
Minimum | Core deposits      
Significant Accounting Policies [Line Items]      
Estimated useful life of intangible asset 5 years    
Maximum | Core deposits      
Significant Accounting Policies [Line Items]      
Estimated useful life of intangible asset 10 years    
Premises | Minimum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 20 years    
Premises | Maximum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 40 years    
Leasehold improvements, furniture, fixtures and equipment | Minimum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 3 years    
Leasehold improvements, furniture, fixtures and equipment | Maximum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 10 years