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Fair Value Measurements (Details 5) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2013
Impaired loans [Member]
Jun. 30, 2013
OREO [Member]
Jun. 30, 2013
Maximum [Member]
Impaired loans [Member]
Jun. 30, 2013
Maximum [Member]
OREO [Member]
Jun. 30, 2013
Minimum [Member]
Impaired loans [Member]
Jun. 30, 2013
Minimum [Member]
OREO [Member]
Dec. 31, 2012
Fair Value, Inputs, Level 3 [Member]
Jun. 30, 2013
Fair Value, Inputs, Level 3 [Member]
Impaired loans [Member]
Jun. 30, 2013
Fair Value, Inputs, Level 3 [Member]
OREO [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]                      
Impaired Loans Measured at Fair Value on Nonrecurring Basis $ 7,433 $ 20,178             $ 20,178 $ 7,433  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]                      
Fair Value                     $ 28,862
Valuation Technique     Appraised value of collateral less estimated costs to sell Appraised value of property less estimated costs to sell              
Significant Unobservable Inputs     Estimated costs to sell Estimated costs to sell              
Range of Inputs (percent)         10.00% 10.00% 4.00% 4.00%