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Consolidated Statements of Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Consolidated Statements of Income      
Impairment charges, other-than-temporary impairment charges $ (431) $ (916) $ (1,003)
Impairment charges, other comprehensive (loss) income $ 1,805 $ (123) $ 26