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Leases - Schedule of Lease Cost (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Lessee, Lease, Description [Line Items] |  |  |
Real estate leases - Right-of-use lease asset amortization | $ 26,804 | $ 26,125 | $ 25,150
Real Estate |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Real estate leases - Right-of-use lease asset amortization | 25,128 | 24,343 |
Real estate leases - Interest expense | 12,996 | 14,139 |
Equipment |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Real estate leases - Right-of-use lease asset amortization | 1,672 | 1,784 |
Real estate leases - Interest expense | $ 152 | $ 142 |

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- Definition Operating Lease, Interest Expense + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Amount of amortization expense for right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Details
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- Details
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Balance Type: |
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