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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Condensed Consolidated Statements of Comprehensive Income        
Reclassification adjustment for net gains realized in earnings, tax expense $ 2,271   $ 2,271 $ 1
Unrealized gains related to factors other than credit, tax expense (benefit) 35   30 69
Reclassification adjustment for impairments realized in net income, tax benefit 10   20 116
Accretion of unrealized losses related to factors other than credit to investment securities held to maturity, tax benefit $ 10 $ 34 $ 27 $ 74