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Disclosures About Fair Value Measurements (Details 1) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Level 3 [Member]
Jun. 30, 2012
Level 3 [Member]
Minimum [Member]
Jun. 30, 2012
Level 3 [Member]
Maximum [Member]
Jun. 30, 2012
Fair Value Measurements, Nonrecurring Basis [Member]
Dec. 31, 2011
Fair Value Measurements, Nonrecurring Basis [Member]
Jun. 30, 2012
Fair Value Measurements, Nonrecurring Basis [Member]
Level 1 [Member]
Dec. 31, 2011
Fair Value Measurements, Nonrecurring Basis [Member]
Level 1 [Member]
Jun. 30, 2012
Fair Value Measurements, Nonrecurring Basis [Member]
Level 2 [Member]
Dec. 31, 2011
Fair Value Measurements, Nonrecurring Basis [Member]
Level 2 [Member]
Jun. 30, 2012
Fair Value Measurements, Nonrecurring Basis [Member]
Level 3 [Member]
Dec. 31, 2011
Fair Value Measurements, Nonrecurring Basis [Member]
Level 3 [Member]
Assets measured at fair value on a non-recurring basis                      
Impaired loans $ 2,162     $ 2,162 $ 2,902             $ 2,162 $ 2,902
Other real estate owned $ 850     $ 850 $ 124             $ 850 $ 124
Appraisal of Adjustment   1.00% (35.00%)                
Liquidation Expense   1.00% (15.00%)                
Estimated Liquidation Expense   1.00% (2.00%)                
Valuation Techniques Appraisal of Collateral