Disclosures About Fair Value of Assets and Liabilities (Quantitative Information about Unobservable Inputs used in Recurring and Nonrecurring Level Three Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Pooled Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 3,000	$ 2,475
Valuation Technique	Discounted cash flow	Discounted cash flow
Constant prepayment rate	2.00%	2.00%
Cumulative projected prepayments	40.00%	40.00%
Pooled Trust Preferred Securities [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	9.00%	9.00%
Probability of default	1.60%	1.50%
Projected cures given deferral	0.00%	0.00%
Loss severity	51.50%	58.00%
Pooled Trust Preferred Securities [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	16.00%	17.00%
Probability of default	2.40%	2.20%
Projected cures given deferral	15.00%	15.00%
Loss severity	76.20%	79.40%
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,880	8,032
Valuation Technique	Third party valuations	Third party valuations
Impaired Loans [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.00%	0.00%
Impaired Loans [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	40.00%	40.00%
Foreclosed Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	227	355
Valuation Technique	Third party valuations	Third party valuations
Foreclosed Real Estate [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount to reflect realizable value less estimated selling costs	0.00%	0.00%
Foreclosed Real Estate [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount to reflect realizable value less estimated selling costs	25.00%	25.00%
Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,938	$ 1,731
Valuation Technique	Third party valuations	Third party valuations
Discount rate	10.10%	10.10%
Servicing fee	0.35%	0.25%
Mortgage Servicing Rights [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Constant prepayment rate	125.00%	100.00%
Mortgage Servicing Rights [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Constant prepayment rate	700.00%	700.00%