Fair Value Measurements Fair Value Measurement, Measured On Non-Recurring Basis, Signfiicant Unobservable Inputs, Quantitative Information (Details) (Fair Value, Measurements, Nonrecurring [Member], Fair Value, Inputs, Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Fair Value, Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 3,891		$ 1,447
Fair Value Measurements, Valuation Techniques	Appraised value, as adjusted		Appraised value, as adjusted
Fair Value Measurements, Significant Unobservable Input	Broker quotes and management's knowledge of industry and collateral.		Broker quotes and management's knowledge of industry and collateral.
Fair Value, Real estate and other repossessed assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	4,421		13,100
Fair Value Measurements, Valuation Techniques	Listing value, less cost to sell		Listing value, less cost to sell
Fair Value Measurements, Significant Unobservable Input	Marketability adjustments off appraised value		Marketability adjustments off appraised value
Fair Value Measurement, Percentage of Appraised Value, Minimum	56.00%	[1]	58.00%
Fair Value Measurement, Percentage of Appraised Value, Maximum	85.00%	[1]	85.00%
Fair Value Measurement, Percentage of Appraised Value, Weighted Average	80.00%	[1]	76.00%
Fair Value Measurement, Fair Value With No Third Party Appraisal	$ 345		$ 2,400

[1] 1 Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value. In addition, $345 thousand of real estate and other repossessed assets at December 31, 2012 are based on uncorroborated expert opinions or management's knowledge of the collateral or industry and do not have an independently appraised value.