Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Securities AFS (4) [Member]
Assets measured at fair value
Fair Value	$ 49,978
Valuation Technique	Discounted cash flow
Unobservable Input	Discount rate
Securities AFS (4) [Member] | Maximum [Member]
Assets measured at fair value
Unobservable Input Value or Range	1.00%
Securities AFS (4) [Member] | Minimum [Member]
Assets measured at fair value
Unobservable Input Value or Range	0.00%
Impaired Loans [Member]
Assets measured at fair value
Fair Value	$ 3,758
Valuation Technique	Appraisal of collateral (1)
Unobservable Input	Appraisal adjustments (2)
Impaired Loans [Member] | Maximum [Member]
Assets measured at fair value
Unobservable Input Value or Range	25.00%
Impaired Loans [Member] | Minimum [Member]
Assets measured at fair value
Unobservable Input Value or Range	0.00%