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Fair Value (Qualitative information for assets and liabilities) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
Sep. 30, 2017
USD ($)
Servicing Assets [Member] | Cash Flow Valuation Technique [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Fair Value assets and liabilities measured on reccurring basis $ 9,818 $ 9,818
Valuation Technique Cash flow valuation  
Servicing Assets [Member] | Cash Flow Valuation Technique [Member] | Minimum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Constant prepayment rate   4.22%
Discount rate   10.00%
Servicing Assets [Member] | Cash Flow Valuation Technique [Member] | Maximum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Constant prepayment rate   9.11%
Discount rate   12.00%
Collateral dependant impaired loan | Fair value of property or collateral [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Fair Value assets and liabilities measured on reccurring basis $ 24,025 $ 24,025
Valuation Technique Fair value of property or collateral  
Collateral dependant impaired loan | Fair value of property or collateral [Member] | Minimum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Appraised value less disposition costs   22.20%
Collateral dependant impaired loan | Fair value of property or collateral [Member] | Maximum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Appraised value less disposition costs   36.20%
Other non-collateral dependant impaired loans [Member] | Cash Flow Valuation Technique [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Fair Value assets and liabilities measured on reccurring basis $ 43,763 $ 43,763
Valuation Technique Cash flow valuation  
Other non-collateral dependant impaired loans [Member] | Cash Flow Valuation Technique [Member] | Minimum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Discount rate   4.15%
Other non-collateral dependant impaired loans [Member] | Cash Flow Valuation Technique [Member] | Maximum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Discount rate   10.50%
Foreclosed real estate [Member] | Fair value of property or collateral [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Fair Value assets and liabilities measured on reccurring basis $ 47,275 $ 47,275
Valuation Technique Fair value of property or collateral  
Foreclosed real estate [Member] | Fair value of property or collateral [Member] | Minimum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Appraised value less disposition costs   22.20%
Foreclosed real estate [Member] | Fair value of property or collateral [Member] | Maximum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Appraised value less disposition costs   36.20%
Other repossessed assets [Member] | Fair value of property or collateral [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Fair Value assets and liabilities measured on reccurring basis $ 3,829 $ 3,829
Valuation Technique Fair value of property or collateral  
Other repossessed assets [Member] | Fair value of property or collateral [Member] | Minimum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Appraised value less disposition costs   34.00%
Other repossessed assets [Member] | Fair value of property or collateral [Member] | Maximum [Member]    
Fair Value Inputs Assets Quantitative Information [Line Items]    
Appraised value less disposition costs   66.00%