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Derivatives - Schedule of by major risk type, the Company’s realized and unrealized gains (losses) relating to derivatives (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | $ 0 | $ 0 | $ 28,035
Unrealized Gain (Loss) on Derivatives | 0 | 0 | (27,391)
Credit Default Swaps - Protection Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (3,557)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 921
Credit Default Swaps - Protection Sold |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (333)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 744
Credit Default Swap [Member] |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 3,486
Unrealized Gain (Loss) on Derivatives | 0 | 0 | (2,000)
Equity Contracts | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 32,460
Unrealized Gain (Loss) on Derivatives | 0 | 0 | (15,098)
Equity Contracts | Short Contracts / Sold |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 4,568
Unrealized Gain (Loss) on Derivatives | 0 | 0 | (3,608)
Total Return Swaps | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 16,792
Unrealized Gain (Loss) on Derivatives | 0 | 0 | (15,864)
Total Return Swaps | Short Contracts / Sold |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (17,329)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 1,883
Interest Rate Swaptions |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (1,819)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 1,228
Index Futures | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 403
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Index Futures | Short Contracts / Sold |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 50
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Sovereign Futures [Member] | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 639
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Sovereign Debt Futures | Short Contracts / Sold |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (1,166)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Total Return Swap [Member] | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (7,569)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Foreign Currency Forward Contracts |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (2,849)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 4,403
Foreign Currency Future Options - Purchased | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (108)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Foreign Currency Options | Long Contracts / Purchased |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 5,138
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Foreign Currency Options | Short Contracts / Sold |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | (771)
Unrealized Gain (Loss) on Derivatives | 0 | 0 | 0
Reinsurance contracts accounted for as derivative assets [Member] |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 0
Unrealized Gain (Loss) on Derivatives | 1,222 | 0 | 0
Embedded derivatives in reinsurance contracts |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 0
Unrealized Gain (Loss) on Derivatives | 1,248 | (9) | 149
Derivative liabilities (embedded) |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Derivatives | 0 | 0 | 0
Unrealized Gain (Loss) on Derivatives | $ 26 | $ (9) | $ 149

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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