XML 97 R76.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Bank Call Loans - Summary of Bank Call Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Bank Call Loans [Abstract] |  |
Year-end balance | $ 0 | $ 15,000
Weighted interest rate (at end of year) | 0.00% | 3.43%
Maximum balance (at any month-end) | $ 76,900 | $ 161,800
Bank Call Loans Average Amount Outstanding | $ 11,063 | $ 53,271
Average interest rate (during the year) | 3.27% | 2.66%

X
- Definition Average interest rates. + References No definition available. + Details
Name: | opy_AverageInterestRates
Namespace Prefix: | opy_
Data Type: | num: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: | num: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 -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | srt_BankLoans
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant