Fair Value Measurements, Quantative information (Details) (Discounted appraised value [Member], Level III [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Impaired Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Level III financial assets fair value	1,178
Impaired Loans [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	30.00%
Impaired Loans [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	10.00%
Impaired Loans [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	21.00%
Other real estate owned [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Level III financial assets fair value	2,310
Other real estate owned [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	12.00%
Other real estate owned [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	12.00%
Other real estate owned [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unobservable inputs value assumptions percentage (in hundredths)	12.00%