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Summary of Impact of Derivative Financial Instruments to Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Derivative [Line Items] |  |  |
Unrealized Gain (Loss) on Derivatives and Commodity Contracts | $ 239,538 | $ 91,325 | $ (127,825)
Freestanding Derivatives |  |  |
Derivative [Line Items] |  |  |
Realized Gains (Losses) | 8,222 | (2,207) | (8,508)
Net Change in Unrealized Gains (Losses) | 231,316 | 93,532 | (119,317)
Freestanding Derivatives | Total Return Swaps |  |  |
Derivative [Line Items] |  |  |
Realized Gains (Losses) | 1,654 | (1,254) | (1,875)
Net Change in Unrealized Gains (Losses) | 5,290 | 2,130 | (1,683)
Freestanding Derivatives | Credit Default Swap |  |  |
Derivative [Line Items] |  |  |
Realized Gains (Losses) | (231) | (1,488) | (109)
Net Change in Unrealized Gains (Losses) | 73 | 1,112 | (1,777)
Freestanding Derivatives | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Realized Gains (Losses) | 15,319 | 1,727 | (7,643)
Net Change in Unrealized Gains (Losses) | 167,706 | 89,702 | (117,145)
Freestanding Derivatives | Foreign Currency Contracts |  |  |
Derivative [Line Items] |  |  |
Realized Gains (Losses) | (8,520) | (1,152) | 1,105
Net Change in Unrealized Gains (Losses) | 9,666 | 608 | 1,231
Freestanding Derivatives | Equity Options |  |  |
Derivative [Line Items] |  |  |
Net Change in Unrealized Gains (Losses) | $ 48,581 |  |
Freestanding Derivatives | Other |  |  |
Derivative [Line Items] |  |  |
Realized Gains (Losses) |  | (40) | 14
Net Change in Unrealized Gains (Losses) |  | $ (20) | $ 57

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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + 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 open derivatives, commodity, or energy 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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