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Investments (Proceeds From Sales And Realized Gains And Losses) (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
Investments [Abstract]        
Proceeds $ 0 $ 0 $ 35,136 $ 10,454
Realized gains 0 0 412 663
Realized losses $ 23 $ 0 $ 185 $ 64