Fair Value Measurements, Quantitative Information (Details)	12 Months Ended
	Dec. 31, 2012
Fair value inputs [Abstract]
Valuation Technique	Present value of cash flows
Loans evaluated using present value of cash flow	1
Impaired Loans Under Range One [Member]
Fair value inputs [Abstract]
Valuation Technique	Discounted appraised value
Impaired Loans Under Range One [Member] | Minimum [Member]
Fair value inputs [Abstract]
Selling cost (in hundredths)	0.00%
Impaired Loans Under Range One [Member] | Maximum [Member]
Fair value inputs [Abstract]
Selling cost (in hundredths)	10.00%
Impaired Loans Under Range One [Member] | Weighted Average [Member]
Fair value inputs [Abstract]
Selling cost (in hundredths)	2.00%
Impaired Loans Under Range Two [Member]
Fair value inputs [Abstract]
Valuation Technique	Discounted appraised value
Impaired Loans Under Range Two [Member] | Minimum [Member]
Fair value inputs [Abstract]
Discount for lack of marketability and age of appraisal (in hundredths)	0.00%
Impaired Loans Under Range Two [Member] | Maximum [Member]
Fair value inputs [Abstract]
Discount for lack of marketability and age of appraisal (in hundredths)	60.00%
Impaired Loans Under Range Two [Member] | Weighted Average [Member]
Fair value inputs [Abstract]
Discount for lack of marketability and age of appraisal (in hundredths)	52.00%
Impaired Loans Under Range Three [Member]
Fair value inputs [Abstract]
Valuation Technique	Present value of cash flows
Impaired Loans Under Range Three [Member] | Minimum [Member]
Fair value inputs [Abstract]
Discount Rate	6.00%
Impaired Loans Under Range Three [Member] | Maximum [Member]
Fair value inputs [Abstract]
Discount Rate	7.50%
Impaired Loans Under Range Three [Member] | Weighted Average [Member]
Fair value inputs [Abstract]
Discount Rate	6.28%
Other Real Estate Owned [Member]
Fair value inputs [Abstract]
Valuation Technique	Discounted appraised value
Other Real Estate Owned [Member] | Minimum [Member]
Fair value inputs [Abstract]
Selling cost (in hundredths)	0.00%	[1]
Discount for lack of marketability and age of appraisal (in hundredths)	0.00%
Other Real Estate Owned [Member] | Maximum [Member]
Fair value inputs [Abstract]
Selling cost (in hundredths)	6.00%
Discount for lack of marketability and age of appraisal (in hundredths)	30.90%
Other Real Estate Owned [Member] | Weighted Average [Member]
Fair value inputs [Abstract]
Selling cost (in hundredths)	4.30%
Discount for lack of marketability and age of appraisal (in hundredths)	4.68%

[1] The Company markets other real estate owned both independently and with local realtors. Properties marketed by realtors are discounted by selling costs. Properties that the Company markets independently are not discounted by selling costs.