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Summary of Significant Accounting Policies (Adoption of New Accounting Pronouncements) (Details)
Jan. 01, 2020
USD ($)
Dec. 31, 2019
USD ($)
segment
Jan. 01, 2019
USD ($)
Jan. 01, 2018
USD ($)
security
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets   $ 9,052,000    
Operating Lease Liabilities   $ 9,125,000    
Number of loan segments | segment   8    
ASU 2016-01        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Number of securities | security       1
ASU 2016-02        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets     $ 9,034,000  
Operating Lease Liabilities     9,034,000  
Retained Earnings | ASU 2016-01        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of new accounting pronouncement in period of adoption       $ 0
Retained Earnings | ASU 2016-02        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of new accounting pronouncement in period of adoption     $ 0  
Accumulated Other Comprehensive Income (Loss) | ASU 2016-01        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of new accounting pronouncement in period of adoption       $ 0
Forecast | Subsequent Event | Minimum | Retained Earnings | ASU 2016-13        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of new accounting pronouncement in period of adoption $ (12,000,000)      
Forecast | Subsequent Event | Maximum | Retained Earnings | ASU 2016-13        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of new accounting pronouncement in period of adoption $ (20,000,000)