Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Securities AFS (1) [Member]
Assets measured at fair value
Fair Value	$ 53,782	$ 18,914
Valuation Technique	Discounted cash flow	Discounted cash flow
Unobservable Input	Discount rate	Discount rate
Securities AFS (1) [Member] | Maximum [Member]
Assets measured at fair value
Unobservable Input Value or Range	1.00%	1.00%
Securities AFS (1) [Member] | Minimum [Member]
Assets measured at fair value
Unobservable Input Value or Range	0.00%	0.00%
Impaired Loans [Member]
Assets measured at fair value
Fair Value	3,587	1,439
Valuation Technique	Appraisal of collateral (3)	Appraisal of collateral (3)
Unobservable Input	Appraisal adjustments (4)	Appraisal adjustments (4)
Impaired Loans [Member] | Maximum [Member]
Assets measured at fair value
Unobservable Input Value or Range	25.00%	25.00%
Impaired Loans [Member] | Minimum [Member]
Assets measured at fair value
Unobservable Input Value or Range	0.00%	0.00%
Other real estate owned [Member]
Assets measured at fair value
Fair Value		$ 1,183
Valuation Technique		Appraisal of collateral (3)
Unobservable Input		Appraisal adjustments (4)
Unobservable Input Value or Range		0.00%