Fair Value (Details 3) (Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Commercial Real Estate [Member] | Income approach Valuation Technique [Member]
Fair value measurements for financial instruments
Fair value	$ 155
Fair Value Measurements Valuation Technique(s) Description	Income approach
Commercial Real Estate [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Fair value	1,548
Fair Value Measurements Valuation Technique(s) Description	Sales comparison
Commercial Real Estate [Member] | Maximum [Member] | Income approach Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences in net operating income, percent	19.40%
Commercial Real Estate [Member] | Maximum [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	14.12%
Commercial Real Estate [Member] | Minimum [Member] | Income approach Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences in net operating income, percent	(28.36%)
Commercial Real Estate [Member] | Minimum [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	(11.30%)
Commercial Real Estate [Member] | Weighted Average [Member] | Income approach Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences in net operating income, percent	(5.47%)
Commercial Real Estate [Member] | Weighted Average [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	(4.38%)
Commercial [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Fair value	869
Fair Value Measurements Valuation Technique(s) Description	Sales comparison
Commercial [Member] | Maximum [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	20.19%
Commercial [Member] | Minimum [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	(45.19%)
Commercial [Member] | Weighted Average [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	(27.05%)
Residential [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Fair value	$ 43
Fair Value Measurements Valuation Technique(s) Description	Sales comparison
Residential [Member] | Maximum [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	23.45%
Residential [Member] | Minimum [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	(46.81%)
Residential [Member] | Weighted Average [Member] | Sales comparison Valuation Technique [Member]
Fair value measurements for financial instruments
Adjustment for differences between comparable sales, Percent	(36.40%)