Fair Value (Valuation Methodology and Unobservable Inputs for Level Three Assets Measured at Fair Value on Non Recurring Basis) (Details) (Company Determined Fair Value (Level 3) [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost	6.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost	10.00%
Impaired Loans Partially Charged Off [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	3,524	[1]
Impaired Loans Partially Charged Off [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment of appraisal	10.00%
Impaired Loans Partially Charged Off [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment of appraisal	30.00%
Impaired Loans Specifically Reserved [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	5,659	[1]
Management adjustment of appraisal		[2]
Other real estate owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	1,313	[1]
Other real estate owned [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment of appraisal	10.00%
Other real estate owned [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment of appraisal	30.00%

[1] Does not include impaired loans that are measured by the present value of expected future cash flows discounted at the loan's effective interest rate.

[2] The specific reserve for collateral-dependent impaired loans is determined by any deficit of 75% of collateral value below the recorded investment.