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Accumulated Other Comprehensive Income, Reclassification out of AOCI (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Tax expense $ 233 $ (138) $ 546 $ 175
Reclassification out of Accumulated Other Comprehensive Income [Member]
       
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Realized gain on sale of securities 0 163 0 163
Unrealized Gains and Losses on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
       
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Realized gain on sale of securities 0 163 0 163
Tax expense 0 55 0 55
Net of tax $ 0 $ 108 $ 0 $ 108