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Securities (Details 4) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
January | $ 1,737 | $ 1,835
Realized losses related to other-than-temporary impairments | (266) | 0
Additions related to other-than-temporary losses not previously recognized | 31 | 0
Additions related to increases in previously recognized other-than-temporary losses | 3 | 0
March | $ 1,505 | $ 1,835

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