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Other Comprehensive Income Details 3 (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Net earnings | $ 69,062 | $ 61,704 | $ 121,606 | $ 114,031 | $ 290,847
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | 5,835 | (24,735) | (11,280) | (3,944) | (10,523)
Comprehensive Income, Net of Tax | $ 74,897 | $ 36,969 | $ 110,326 | $ 110,087 |

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