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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
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Level 3 [Member]
Sep. 30, 2011
Level 3 [Member]
Sep. 30, 2012
Appraisals Of Collateral [Member]
Range of Inputs: Minimum [Member]
Level 3 [Member]
Collateral Dependent Impaired Loans [Member]
Sep. 30, 2012
Appraisals Of Collateral [Member]
Range of Inputs: Minimum [Member]
Level 3 [Member]
Property Acquired Through Foreclosure Or Repossession [Member]
Sep. 30, 2012
Appraisals Of Collateral [Member]
Range of Inputs: Maximum [Member]
Level 3 [Member]
Collateral Dependent Impaired Loans [Member]
Sep. 30, 2012
Appraisals Of Collateral [Member]
Range of Inputs: Maximum [Member]
Level 3 [Member]
Property Acquired Through Foreclosure Or Repossession [Member]
Sep. 30, 2012
Appraisals Of Collateral [Member]
Weighted Average [Member]
Level 3 [Member]
Collateral Dependent Impaired Loans [Member]
Sep. 30, 2012
Appraisals Of Collateral [Member]
Weighted Average [Member]
Level 3 [Member]
Property Acquired Through Foreclosure Or Repossession [Member]
Sep. 30, 2012
Discounted Cash Flow [Member]
Range of Inputs: Minimum [Member]
Level 3 [Member]
Loan Servicing Rights [Member]
Sep. 30, 2012
Discounted Cash Flow [Member]
Range of Inputs: Maximum [Member]
Level 3 [Member]
Loan Servicing Rights [Member]
Sep. 30, 2012
Discounted Cash Flow [Member]
Weighted Average [Member]
Level 3 [Member]
Loan Servicing Rights [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]                          
Collateral dependent impaired loans $ 5,821 $ 6,599 $ 5,821 $ 6,599                  
Loan servicing rights 902 482 902 482                  
Property acquired through foreclosure or repossession $ 1,139 $ 892 $ 1,139 $ 892                  
Discount For Costs To Sell         1.00% 0.00% 50.00% 10.00% 15.00% 4.00%      
Appraisal Adjustments         0.00% [1] 15.00% [1] 15.00% [1] 34.00% [1] 15.00% [1] 20.00% [1]      
Discount Rate                     0.09% 2.80% 2.20%
[1] Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.