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Securitizations and Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Average period to securitization | 30 days |  |
MSRs retained | $ 34,260 | $ 6,561 |
Percentage of loan transferred through securitization 60 days or more past due | 5.50% |  | 6.80%
Ginnie Mae Loans |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Percentage of loan transferred through securitization 60 days or more past due | 15.20% |  | 17.10%

X
- Definition Time period in which securitization takes place after loan closing or purchase. + References No definition available. + Details
Name: | ocn_AveragePeriodtoSecuritization
Namespace Prefix: | ocn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of loan transferred through securitization 60 days or more past due. + References No definition available. + Details
Name: | ocn_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue
Namespace Prefix: | ocn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of mortgage servicing rights (MSRs) retained in connection with transfer of securitized loans accounted for as sales. + References No definition available. + Details
Name: | ocn_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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
Name: | us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=ocn_GinnieMaeLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |