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Equity - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Investment fair value changes, net | $ (35,500,000) | $ 25,689,000 | $ (10,374,000)
Realized gains, net | (23,821,000) | (27,041,000) | (13,355,000)
Provision for income taxes | 7,440,000 | 11,088,000 | 11,752,000
Net income before provision for income taxes | (176,623,000) | (130,688,000) | $ (152,158,000)
Other than temporary impairments | 0 | 1,000,000 |
Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings |  | 100,000 |
Accumulated other comprehensive income, other-than-temporary impairments |  | 1,000,000 |
Reclassification out of Accumulated Other Comprehensive Income | Net Unrealized Gains on Available-for-Sale Securities |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Investment fair value changes, net | 0 | 89,000 |
Realized gains, net | (19,967,000) | (27,178,000) |
Provision for income taxes | 0 | 1,528,000 |
Net income before provision for income taxes | $ (19,967,000) | $ (25,561,000) |

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- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=118954083&loc=SL6284422-111562 + Details
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