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Fair Value Measurements (Qualitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Fair Value Inputs Assets Qualitative Information [Line Items]    
Collateral dependent impaired loans [1] $ 7,079 $ 17,138
Nonrecurring [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Collateral dependent impaired loans 3,828 10,545
Property acquired through foreclosure or repossession 605 270
Nonrecurring [Member] | Level 3 [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Collateral dependent impaired loans 3,828 10,545
Property acquired through foreclosure or repossession $ 605 $ 270
Nonrecurring [Member] | Level 3 [Member] | Appraisals Of Collateral [Member] | Collateral Dependent Impaired Loans [Member] | Minimum [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Discount for costs to sell 10.00% 0.00%
Appraisal adjustments [2] 0.00%  
Nonrecurring [Member] | Level 3 [Member] | Appraisals Of Collateral [Member] | Collateral Dependent Impaired Loans [Member] | Maximum [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Discount for costs to sell 20.00% 20.00%
Appraisal adjustments [2] 10.00%  
Nonrecurring [Member] | Level 3 [Member] | Appraisals Of Collateral [Member] | Collateral Dependent Impaired Loans [Member] | Weighted Average [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Discount for costs to sell 15.00% 2.00%
Appraisal adjustments [2] 9.00%  
Nonrecurring [Member] | Level 3 [Member] | Appraisals Of Collateral [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Minimum [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Discount for costs to sell 10.00% 12.00%
Appraisal adjustments [2] 6.00% 32.00%
Nonrecurring [Member] | Level 3 [Member] | Appraisals Of Collateral [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Maximum [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Discount for costs to sell 12.00% 12.00%
Appraisal adjustments [2] 50.00% 32.00%
Nonrecurring [Member] | Level 3 [Member] | Appraisals Of Collateral [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Weighted Average [Member]    
Fair Value Inputs Assets Qualitative Information [Line Items]    
Discount for costs to sell 11.00% 12.00%
Appraisal adjustments [2] 24.00% 32.00%
[1] The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (troubled debt restructurings for which management has concluded that the collectability of the loan is not in doubt), the recorded investment also includes accrued interest.
[2] Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.