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Supplemental Balance Sheet Information - Summary of Components of Balance Sheet Accounts (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accrued expenses and other liabilities | [1] | $ 890,690 | $ 890,653
Operating lease, right-of-use asset | [2] | 165,969 | 169,065
Operating lease, liability | [2] | 190,207 | 187,398
Besso and Ed Broking [Member] |  |  |
Accrued expenses and other liabilities |  | $ 607,300 | $ 594,000
[1] | As of December 31, 2020, $607.3 million is attributable to Besso and Ed Broking. As of December 31, 2019, $594.0 million is attributable to Besso and Ed Broking. See “Cash Segregated Under Regulatory Requirements” and “Accrued Commissions and Other Receivables, Net” in Note 3—“Summary of Significant Accounting Policies” for additional information.
[2] | As of December 31, 2020, $166.0 million and $190.2 million, relating to lease ROU assets and lease liabilities, respectively, is attributable to the adoption of ASU No. 2016-02, Leases (Topic 842). As of December 31, 2019, $169.1 million and $187.4 million, relating to lease ROU assets and lease liabilities, respectively, is attributable to the adoption of ASU No. 2016-02, Leases (Topic 842). See Note 27—“Leases”, in addition to the information under the heading “Recently Adopted Accounting Pronouncements” included in Note 1—“Organization and Basis of Presentation” for additional information.

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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