Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity Reclassifications out of Accumulated Other Comprehensive Income (Details)

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Stockholders' Equity Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (Loss) on Investments, Excluding Other than Temporary Impairments     $ (77,653) $ (11,720)
Reclassification out of Accumulated Other Comprehensive Income [Member]
       
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net 1,426 4,476 1,662 8,751
Gain (Loss) on Investments, Excluding Other than Temporary Impairments (45,143) 2,846 (63,918) (7,145)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ (43,717) $ 7,322 $ (62,256) $ 1,606