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, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (Loss) on Investments, Excluding Other than Temporary Impairments     $ (37,805) $ (199,389)
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 $ 90 $ 170 807 297
Gain (Loss) on Investments, Excluding Other than Temporary Impairments (5,130) (75,135) (24,256) (175,071)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ (5,040) $ (74,965) $ (23,449) $ (174,774)