Fair Value Measurements (Additional Quantitative Information About Assets Measured At Fair Value On A Recurring And Non-Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Collateral Dependent Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets at fair value	$ 4,488	[1]
Discount rate	4.80%	[2]
Risk premium rate	10.10%	[2]
Loan Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets at fair value	1,654
Discount rate	4.40%	[2]
Constant prepayment rate	28.00%	[2]
Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets at fair value	$ 371	[1]
Minimum [Member] | Collateral Dependent Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	16.00%	[3]
Minimum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	6.00%	[3]
Maximum [Member] | Collateral Dependent Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	100.00%	[3]
Maximum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	53.00%	[3]

[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable.

[2] Weighted averages.

[3] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.