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Fair Value (Qualitative information for assets and liabilities) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 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 $ 9,688
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 3.90%
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 8.96%
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 $ 23,587
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 24.20%
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 38.20%
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 $ 36,031
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]  
Constant prepayment rate 3.25%
Other non-collateral dependant impaired loans [Member] | Cash Flow Valuation Technique [Member] | Maximum [Member]  
Fair Value Inputs Assets Quantitative Information [Line Items]  
Constant prepayment 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 $ 47,551
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 24.20%
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 38.20%
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 $ 3,269
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 47.00%
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 53.00%