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
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (Loss) on Investments, Excluding Other than Temporary Impairments     $ (199,389) $ 967
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 $ (170) $ 0 297 212
Gain (Loss) on Investments, Excluding Other than Temporary Impairments 75,135 20,952 (175,071) 22,228
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 74,965 $ 20,952 $ (174,774) $ 22,440