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Fair Value Measurements (Details 2) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Weighted Average [Member]
Sep. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Sep. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Maximum [Member]
Sep. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Minimum [Member]
Sep. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Weighted Average [Member]
Quantitative Information about Level 3 Fair Value Measurements              
Loan Securities $ 5,756 $ 5,343   $ 5,756      
Valuation Technique       Discounted cash flow      
Constant prepayment rate     0.00% 0.00%      
Probability of default     0.00% 0.00%      
Loss severity     0.00% 0.00%      
Yield to maturity         12.35% 6.26% 9.42%