Fair Value Measurements (Quantitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) (Nonrecurring [Member], USD $) In Thousands, unless otherwise specified					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Level 3 [Member]	Dec. 31, 2011 Level 3 [Member]	Dec. 31, 2012 Level 3 [Member] Appraisals Of Collateral [Member] Collateral Dependent Impaired Loans [Member] Minimum [Member]		Dec. 31, 2012 Level 3 [Member] Appraisals Of Collateral [Member] Collateral Dependent Impaired Loans [Member] Maximum [Member]		Dec. 31, 2012 Level 3 [Member] Appraisals Of Collateral [Member] Collateral Dependent Impaired Loans [Member] Weighted Average [Member]		Dec. 31, 2012 Level 3 [Member] Appraisals Of Collateral [Member] Property Acquired Through Foreclosure Or Repossession [Member] Minimum [Member]		Dec. 31, 2012 Level 3 [Member] Appraisals Of Collateral [Member] Property Acquired Through Foreclosure Or Repossession [Member] Maximum [Member]		Dec. 31, 2012 Level 3 [Member] Appraisals Of Collateral [Member] Property Acquired Through Foreclosure Or Repossession [Member] Weighted Average [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Collateral dependent impaired loans	$ 9,550	$ 10,391	$ 9,550	$ 10,391
Property acquired through foreclosure or repossession	$ 1,073	$ 1,758	$ 1,073	$ 1,758
Discount For Costs To Sell					0.00%		50.00%		11.00%		0.00%		10.00%		5.00%
Appraisal Adjustments					0.00%	[1]	27.00%	[1]	18.00%	[1]	15.00%	[1]	34.00%	[1]	21.00%	[1]

[1] Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.