Securities (Details 4) (Total debt securities, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Total debt securities
     
Credit losses at beginning of the period $ 441 $ 245 $ 180
Credit losses related to securities for which an other-than-temporary impairment was previously recognized 0 196 65
Sales of securities for which an other-than-temporary impairment was previously recognized (441) 0 0
Ending balance of credit losses on debt securities held for which a portion of an other-than-temporary impairment was recognized in other comprehensive income $ 0 $ 441 $ 245