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Fair Value Measurements and Fair Value of Financial Instruments (Additional Qualitative Information about Level 3 Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2014
loan
Sep. 30, 2013
loan
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired Financing Receivable, Recorded Investment $ 6,913   $ 12,609
Number of impaired loans requiring a valuation allowance 2 1  
Impaired Financing Receivable, with Related Allowance, Recorded Investment 1,986   1,723
Impaired Financing Receivable, Related Allowance 61   53
Number of impaired loans not requiring a valuation allowance 14 20  
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 4,927   10,886
Impaired Loans, Cumulative Charge-Offs 1,022   3,714
Impaired Loans [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets, Fair Value Disclosure, Nonrecurring 6,852   12,556
Fair Value Measurements, Valuation Techniques Appraisal of collateral(1) [1]   Appraisal of collateral(1) [1]
Fair Value Disclosure, Unbservable Input Range Appraisal adjustments(2) [2]   Appraisal adjustments(2) [2]
Impaired Loans [Member] | Minimum [Member] | Unobservable Inputs Appraisal Adjustments [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value Inputs, Discount Rate     10.00%
Impaired Loans [Member] | Maximum [Member] | Unobservable Inputs Appraisal Adjustments [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value Inputs, Discount Rate     15.00%
Impaired Loans [Member] | Weighted Average [Member] | Unobservable Inputs Appraisal Adjustments [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value Inputs, Discount Rate 10.00%   10.67%
Foreclosed Real Estate Owned [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets, Fair Value Disclosure, Nonrecurring $ 4,962   $ 1,009
Fair Value Measurements, Valuation Techniques Appraisal of collateral(1) [1]   Appraisal of collateral(1) [1]
Fair Value Disclosure, Unbservable Input Range Liquidation Expenses(2) [2]   Liquidation Expenses(2) [2]
Foreclosed Real Estate Owned [Member] | Weighted Average [Member] | Unobservable Inputs - Liquidation Expenses [Member]
      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value Inputs, Discount Rate 10.00%   10.00%
[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable, less any associated allowance.
[2] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.