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Accumulated Other Comprehensive Income Details 2 (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Net Income (Loss) Attributable to Parent $ 58,051 $ 52,544 $ 306,094
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 1,853 (17,115) 62,425
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ 59,904 $ 35,429