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Investments (Schedule of Unrealized Appreciation) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Investments [Abstract]    
Net change in unrealized appreciation on available-for-sale securities before deferred tax $ 3,262 $ (4,243)
Deferred income tax (1,109) 1,442
Net change in unrealized appreciation on available-for-sale securities $ 2,153 $ (2,801)