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	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Fair Value, Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 1,655		$ 2,086
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.		Adjustments to appraised value
Fair Value, Real estate and other repossessed assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	6,617		0
Fair Value Measurements, Valuation Techniques	Listing value, less cost to sell
Fair Value Measurements, Significant Unobservable Input	Marketability adjustments off appraised value
Fair Value Measurement, Percentage of Appraised Value, Minimum	68.00%	[1]	0.00%
Fair Value Measurement, Percentage of Appraised Value, Maximum	100.00%	[1]	41.00%
Fair Value Measurement, Percentage of Appraised Value, Weighted Average	85.00%	[1]	17.00%
Fair Value Measurement, Fair Value With No Third Party Appraisal	$ 796

[1] of real estate and other repossessed assets at September 30, 2012 are based on uncorroborated expert opinions or management's knowledge of the collateral or industry and do not have an independently appraised value.