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Fair Value (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Held-for-sale, Fair Value Disclosure $ 15,204,000   $ 15,204,000   $ 7,306,000      
Impaired Financing Receivable, Carrying Value 73,766,000   $ 73,766,000   76,473,000      
Discount percentage applied to real estate appraised values     15.00%          
Discount percentage applied to lot development appraised values     6.00%          
Partial Charge-Offs On Impaired Loans     $ 22,201,000   28,705,000      
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 4,232,000   4,232,000   4,191,000      
Impaired Financing Receivable, Related Allowance 4,232,000   4,232,000   4,191,000      
Impaired Loan Fair Value 7,876,000   7,876,000   9,496,000      
Partial Charge-Offs On Impaired Loans carried at Fair Value     3,929,000   10,512,000      
Book Value Of Impaired Loans Carried At Fair Value 8,918,000   8,918,000   11,783,000      
Impaired Financing Receivable, carried at fair value, related expense 2,900,000 $ (100,000) 1,900,000 $ (1,800,000)        
MSR recorded at lower of cost or fair value 8,745,000 8,812,000 8,745,000 8,812,000 9,008,000 $ 8,880,000 $ 8,561,000 $ 8,613,000
Mortgage Servicing Rights Fair Value 4,300,000   4,300,000   1,900,000      
Valuation allowance of MSR 1,111,000 644,000 1,111,000 644,000 542,000 $ 751,000 $ 855,000 $ 826,000
MSRs recorded at cost 4,400,000   4,400,000   7,100,000      
Changes due to fair value adjustments 360,000 211,000 569,000 (182,000)        
Other Real Estate, Foreclosed Assets, and Repossessed Assets $ 14,941,000   $ 14,941,000   $ 18,651,000      
Percent of OREO held at fair value 51.72%   51.72%   45.57396%      
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Fair Value $ 7,700,000   $ 7,700,000   $ 8,500,000      
OREO valuation adjustments 233,000 $ 718,000 572,000 $ 1,273,000        
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Impaired Financing Receivable, Related Allowance 1,042,000   1,042,000   2,287,000      
Financing Receivable, not collateral dependent [Domain]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Impaired Financing Receivable, Related Allowance 3,190,000   3,190,000   1,904,000      
Commercial Real Estate Portfolio Segment [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 525,000   525,000   381,000      
Residential Real Estate [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Other Real Estate, Foreclosed Assets, and Repossessed Assets $ 2,150,000   $ 2,150,000   3,059,000      
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Impaired Loan Fair Value         3,698,000      
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Impaired Loan Fair Value         $ 1,882,000      
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Commercial [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     69.00%   71.00%      
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Construction [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     85.00%   85.00%      
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     90.00%   45.90%      
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     110.00%   96.70%      
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Residential [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     61.80%   61.80%      
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Commercial [Member] | Real Estate [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     23.00%   26.90%      
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Construction [Member] | Real Estate [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     27.40%   24.30%      
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     21.90%   20.30%      
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     15.40%   12.50%      
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Residential [Member] | Real Estate [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     30.20%   23.00%      
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Commercial [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     0.00%   2.00%      
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Construction [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     0.00%   0.00%      
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     0.00%   0.00%      
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     0.00%   0.00%      
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Residential [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Comparability Adjustments     2.80%   0.10%      
Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Commercial [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     14.00%   9.50%      
Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     11.00%   13.30%      
Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     10.00%   10.10%      
Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Commercial [Member] | Real Estate [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     9.90%   9.50%      
Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     10.10%   9.50%      
Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     10.00%   9.10%      
Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Commercial [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     9.50%   9.50%      
Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     7.00%   7.00%      
Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Cap Rate     10.00%   3.80%      
Cost Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Accumulated Depreciation     50.00%   50.00%      
Cost Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Accumulated Depreciation     50.00%   50.00%      
Cost Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Accumulated Depreciation     38.20%   50.00%      
Cost Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Accumulated Depreciation     50.00%   43.40%      
Cost Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Accumulated Depreciation     17.00%   50.00%      
Cost Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Accumulated Depreciation     50.00%   33.30%      
Bulk Sale Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Construction [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Discount Rate     15.00%   15.00%      
Bulk Sale Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Construction [Member] | Real Estate [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Discount Rate     15.00%   15.00%      
Bulk Sale Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned, Construction [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair Value Inputs, Discount Rate     15.00%   15.00%