XML 28 R15.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Securities Owned | 3 Months Ended
--- | ---
Mar. 31, 2018
Investments Debt And Equity Securities [Abstract] |
Securities Owned |
7. | Securities Owned
Securities owned primarily consist of unencumbered U.S. Treasury bills held for liquidity purposes. Total Securities owned were $89.4 million as of March 31, 2018 and $33.0 million as of December 31, 2017. For additional information, see Note 13—“Fair Value of Financial Assets and Liabilities.”

X
- Definition Securities owned disclosure. + References No definition available. + Details
Name: | bgcp_SecuritiesOwnedDisclosureTextBlock
Namespace Prefix: | bgcp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration