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.

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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

+ Details

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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+ Details

Notes Payable and Other Borrowings - Carrying Amounts and Estimated Fair Values of Company's Senior Notes (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Nov. 10, 2025	Apr. 02, 2025	Aug. 21, 2024	Oct. 06, 2023	May 25, 2023
Debt Instrument [Line Items]
Carrying Amount	$ 1,539,632	$ 1,538,019
Fair Value	$ 1,597,257	1,623,468
BGC Group 8.000% Senior Notes due May 25, 2028
Debt Instrument [Line Items]
Stated interest rate	8.00%		8.00%			8.00%
Carrying Amount	$ 345,771	345,387
Fair Value	$ 363,118	371,490
BGC Partners 8.000% Senior Notes due May 25, 2028
Debt Instrument [Line Items]
Stated interest rate	8.00%				8.00%	8.00%	8.00%
Carrying Amount	$ 2,264	2,262			$ 500
Fair Value	$ 2,377	2,432
BGC Group 6.600% Senior Notes due June 10, 2029
Debt Instrument [Line Items]
Stated interest rate	6.60%		6.60%
Carrying Amount	$ 497,049	496,548
Fair Value	$ 516,306	522,825
BGC Group 6.150% Senior Notes due April 2, 2030
Debt Instrument [Line Items]
Stated interest rate	6.15%			6.15%
Carrying Amount	$ 694,548	693,822
Fair Value	$ 715,456	$ 726,721