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Investments (Securities Gains (Losses)) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Schedule of Investments [Line Items]    
Gross gains on sales of investment securities available for sale $ 0 $ 156
Gross losses on sales of investment securities available for sale 0 (605)
Total securities losses (45) (449)
Equity Securities [Member]
   
Schedule of Investments [Line Items]    
Other that temporary impairment loss on equity securities $ 45 $ 0