Fair Value Measurements, Quantitative information (Details) (Level III [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Recurring [Member] | Corporate securities [Member] | Third Party Trading Desk [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Level III financial assets fair value	$ 485
Nonrecurring [Member] | Impaired Loans [Member] | Market Comparables [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Level III financial assets fair value	4,614	[1]
Nonrecurring [Member] | Impaired Loans [Member] | Discounted Appraised Value [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Level III financial assets fair value			1,178
Nonrecurring [Member] | Impaired Loans [Member] | Discounted Appraised Value [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	10.00%	[1]	10.00%
Nonrecurring [Member] | Impaired Loans [Member] | Discounted Appraised Value [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	30.00%	[1]	30.00%
Nonrecurring [Member] | Impaired Loans [Member] | Discounted Appraised Value [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	21.00%	[1]	21.00%
Nonrecurring [Member] | Other real estate owned [Member] | Discounted Appraised Value [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Level III financial assets fair value			$ 2,310
Unobservable inputs value assumptions percentage (in hundredths)			12.00%
Nonrecurring [Member] | Other real estate owned [Member] | Discounted Appraised Value [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)			12.00%

[1] A discount percentage is applied based on age of independent appraisals, current market conditions, and experience within the local markets.