Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Other real estate owned	$ 13,983
Collateral-dependent impaired loans, net of ALLL	22,966
Cost Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Other real estate owned	93
Collateral-dependent impaired loans, net of ALLL	84
Cost Approach [Member] | Selling Costs [Member] | Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	7.00%
Maximum Rate on Unobservable Inputs	7.00%
Weighted Average Rate on Unobservable Inputs	7.00%
Cost Approach [Member] | Selling Costs [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	8.00%
Maximum Rate on Unobservable Inputs	8.00%
Weighted Average Rate on Unobservable Inputs	8.00%
Sales Comparison Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Other real estate owned	11,787
Collateral-dependent impaired loans, net of ALLL	12,878
Sales Comparison Approach [Member] | Selling Costs [Member] | Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	7.00%
Maximum Rate on Unobservable Inputs	14.00%
Weighted Average Rate on Unobservable Inputs	7.90%
Sales Comparison Approach [Member] | Selling Costs [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	0.00%
Maximum Rate on Unobservable Inputs	16.00%
Weighted Average Rate on Unobservable Inputs	8.60%
Sales Comparison Approach [Member] | Adjustment to Comparables [Member] | Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	0.00%
Maximum Rate on Unobservable Inputs	37.00%
Weighted Average Rate on Unobservable Inputs	11.70%
Sales Comparison Approach [Member] | Adjustment to Comparables [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	0.00%
Maximum Rate on Unobservable Inputs	12.00%
Weighted Average Rate on Unobservable Inputs	1.60%
Combined Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Other real estate owned	2,103
Collateral-dependent impaired loans, net of ALLL	4,495
Combined Approach [Member] | Selling Costs [Member] | Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	5.00%
Maximum Rate on Unobservable Inputs	8.00%
Weighted Average Rate on Unobservable Inputs	6.60%
Combined Approach [Member] | Selling Costs [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	8.00%
Maximum Rate on Unobservable Inputs	10.00%
Weighted Average Rate on Unobservable Inputs	8.40%
Combined Approach [Member] | Adjustment to Comparables [Member] | Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	0.00%
Maximum Rate on Unobservable Inputs	30.00%
Weighted Average Rate on Unobservable Inputs	7.70%
Combined Approach [Member] | Adjustment to Comparables [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	0.00%
Maximum Rate on Unobservable Inputs	36.00%
Weighted Average Rate on Unobservable Inputs	17.60%
Combined Approach [Member] | Discount Rate [Member] | Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	25.00%
Maximum Rate on Unobservable Inputs	25.00%
Weighted Average Rate on Unobservable Inputs	25.00%
Combined Approach [Member] | Discount Rate [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	8.00%
Maximum Rate on Unobservable Inputs	8.00%
Weighted Average Rate on Unobservable Inputs	8.00%
Income Approach [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Collateral-dependent impaired loans, net of ALLL	$ 5,509
Income Approach [Member] | Selling Costs [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	8.00%
Maximum Rate on Unobservable Inputs	10.00%
Weighted Average Rate on Unobservable Inputs	8.20%
Income Approach [Member] | Discount Rate [Member] | Collateral-dependent Impaired Loans, Net of ALLL [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Minimum Rate on Unobservable Inputs	0.00%
Maximum Rate on Unobservable Inputs	8.30%
Weighted Average Rate on Unobservable Inputs	6.30%