Fair Value Measurements, Quantitative Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Impaired Loans [Member] | Commercial [Member] | Nonrecurring [Member] | Sales approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value	1,163
Impaired Loans [Member] | Commercial [Member] | Nonrecurring [Member] | Minimum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(45.00%)
Impaired Loans [Member] | Commercial [Member] | Nonrecurring [Member] | Maximum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	80.00%
Impaired Loans [Member] | Commercial [Member] | Nonrecurring [Member] | Weighted Average [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(17.50%)
Real Estate [Member] | Commercial Construction [Member] | Nonrecurring [Member] | Income approach [Member]
Unobservable Inputs [Abstract]
Discount Rate (in hundredths)	7.92%
Real Estate [Member] | Commercial Construction [Member] | Nonrecurring [Member] | Sales approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value	8,824
Real Estate [Member] | Commercial Construction [Member] | Nonrecurring [Member] | Minimum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	0.00%
Real Estate [Member] | Commercial Construction [Member] | Nonrecurring [Member] | Maximum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	186.90%
Real Estate [Member] | Commercial Construction [Member] | Nonrecurring [Member] | Weighted Average [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(93.45%)
Real Estate [Member] | Residential Real Estate [Member] | Nonrecurring [Member] | Income approach [Member]
Unobservable Inputs [Abstract]
Capitalization rate (in hundredths)	8.90%
Real Estate [Member] | Residential Real Estate [Member] | Nonrecurring [Member] | Sales approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value	3,195
Real Estate [Member] | Residential Real Estate [Member] | Nonrecurring [Member] | Minimum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(13.70%)
Real Estate [Member] | Residential Real Estate [Member] | Nonrecurring [Member] | Maximum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	24.20%
Real Estate [Member] | Residential Real Estate [Member] | Nonrecurring [Member] | Weighted Average [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(5.25%)
Real Estate [Member] | Commercial Real Estate [Member] | Nonrecurring [Member] | Income approach [Member]
Unobservable Inputs [Abstract]
Capitalization rate (in hundredths)	11.00%
Real Estate [Member] | Commercial Real Estate [Member] | Nonrecurring [Member] | Sales approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value	3,497
Real Estate [Member] | Commercial Real Estate [Member] | Nonrecurring [Member] | Minimum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(40.00%)
Real Estate [Member] | Commercial Real Estate [Member] | Nonrecurring [Member] | Maximum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	52.00%
Real Estate [Member] | Commercial Real Estate [Member] | Nonrecurring [Member] | Weighted Average [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(6.00%)
Other Real Estate Owned [Member] | Nonrecurring [Member] | Sales approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value	17,091
Other Real Estate Owned [Member] | Nonrecurring [Member] | Minimum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	1.97%
Other Real Estate Owned [Member] | Nonrecurring [Member] | Maximum [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	77.35%
Other Real Estate Owned [Member] | Nonrecurring [Member] | Weighted Average [Member] | Sales approach [Member]
Unobservable Inputs [Abstract]
Adjustment for differences between the comparable sales (in hundredths)	(29.93%)
Asset-Backed Securities [Member] | Recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value	132
Asset-Backed Securities [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow Member]
Unobservable Inputs [Abstract]
Discount Rate (in hundredths)	2.73%
Asset-Backed Securities [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow Member]
Unobservable Inputs [Abstract]
Discount Rate (in hundredths)	3.22%
Asset-Backed Securities [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow Member]
Unobservable Inputs [Abstract]
Discount Rate (in hundredths)	(2.98%)