XML 98 R75.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Bank call loans - Schedule of Bank Call Loans (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Bank Call Loans [Abstract] |  |
Year-end balance | $ 0 | $ 0
Weighted interest rate (at end of year) (as a percent) | 0.00% | 0.00%
Maximum balance (at any month-end) | $ 131,900,000 | $ 179,200,000
Average amount outstanding (during the year) | $ 49,387,000 | $ 79,366,000
Average interest rate (during the year) (as a percent) | 4.20% | 2.18%

X
- Definition Average interest rates. + References No definition available. + Details
Name: | opy_AverageInterestRates
Namespace Prefix: | opy_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Bank Call Loans [Abstract] + References No definition available. + Details
Name: | opy_BankCallLoansAbstract
Namespace Prefix: | opy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Bank Call Loans Average Amount Outstanding + References No definition available. + Details
Name: | opy_BankCallLoansAverageAmountOutstanding
Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Bank loans maximum balance at any month end. + References No definition available. + Details
Name: | opy_BankLoansMaximumBalanceAtAnyMonthEnd
Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Weighted average interest rate. + References No definition available. + Details
Name: | opy_WeightedAverageInterestRate
Namespace Prefix: | opy_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of short-term bank loan secured by broker-dealer customer's security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
Name: | srt_BankLoans
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant