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Investments (Composition Of Net Realized Securities Gains (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Investments [Abstract]      
Gross gains realized (including gain on conversion) $ 736 $ 284 $ 185
Gross losses realized   (4) (152)
Net gains realized $ 736 $ 280 $ 33