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Derivatives - Fair Value of Derivative Contracts (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Derivative contracts, Assets |  | $ 3,337 | $ 931
Derivative contracts, Liabilities |  | 2,690 | 1,460
Notional Amounts | [1] | 11,604,937 | 6,933,793
FX/Commodities Options [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Derivative contracts, Assets |  |  | 74
Derivative contracts, Liabilities |  | 151 |
Notional Amounts | [1] | 5,446 | 4,844
FX Swaps [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Derivative contracts, Assets |  | 2,756 | 562
Derivative contracts, Liabilities |  | 1,527 | 319
Notional Amounts | [1] | 631,819 | 513,588
Forwards [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Derivative contracts, Assets |  | 581 | 295
Derivative contracts, Liabilities |  | 531 | 215
Notional Amounts | [1] | 259,435 | 302,141
Futures [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Derivative contracts, Liabilities |  | 481 | 926
Notional Amounts | [1] | $ 10,708,237 | $ 6,113,220
[1] | Notional amounts represent the sum of gross long and short derivative contracts, an indication of the volume of the Company’s derivative activity, and do not represent anticipated losses.

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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 + Details
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