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Fair Value (Details 3) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Assets:    
Impaired Loans $ 64,585,000 $ 73,646,000
Non-financial assets:    
Other real estate owned 85,879,000 100,106,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3    
Charges to allowance for probable loan losses in connection with other real estate owned 402,000 10,450,000
Adjustment to fair value in connection with other real estate owned 1,204,000 0
Impaired commercial collateral dependent loans 64,585,000 73,646,000
Impaired commercial collateral dependent receivables appraisals to determine fair value within immediately preceding twelve months 50,346,000 48,856,000
Significant Unobservable Inputs (Level 3) | Bond meeting the original contract terms
   
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3    
Minimum period of residential mortgage loan performance under original contract terms 24 months 24 months
Estimated future principal prepayment rate assumption, low end of range (as a percent) 7.00% 7.00%
Default rate assumptions (as a percent) 1.00% 1.00%
Loss severity rate assumptions, first year (as a percent) 25.00% 25.00%
Estimated future principal prepayment rate assumption, discount rate (as a percent) 13.00% 13.00%
Significant Unobservable Inputs (Level 3) | Bond not meeting the original contract terms
   
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3    
Estimated future principal prepayment rate assumption, low end of range (as a percent) 2.00% 2.00%
Default rate assumptions (as a percent) 4.50% 4.50%
Loss severity rate assumptions, first year (as a percent) 60.00% 60.00%
Decrease in loss severity rates, following five years (as a percent) 5.00% 5.00%
Loss severity rate, thereafter (as a percent) 25.00% 25.00%
Estimated future principal prepayment rate assumption, discount rate (as a percent) 13.00% 13.00%
Measured on a non-recurring basis:
   
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3    
Change in net provision, impaired loans 13,229,000 295,000
Change in net provision, other real estate owned 1,204,000  
Measured on a non-recurring basis: | Assets/Liabilities Measured at Fair Value
   
Assets:    
Impaired Loans 28,391,000 11,981,000
Non-financial assets:    
Other real estate owned 16,329,000 18,749,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3    
Impaired commercial collateral dependent loans 28,391,000 11,981,000
Measured on a non-recurring basis: | Significant Unobservable Inputs (Level 3)
   
Assets:    
Impaired Loans 28,391,000 11,981,000
Non-financial assets:    
Other real estate owned 16,329,000 18,749,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3    
Impaired commercial collateral dependent loans $ 28,391,000 $ 11,981,000