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Mortgage Servicing - Schedule of Activity Related to MSRs - Fair Value Measurement Method (Footnote) (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 20, 2020	Mar. 31, 2021	Mar. 31, 2020
Servicing Assets at Fair Value [Line Items]
Servicing transfers and adjustments		$ 528	$ 264,523
New Residential Investment Corp
Servicing Assets at Fair Value [Line Items]
Servicing transfers and adjustments	$ 263,700

X

- Definition

Amount of increase (decrease) in fair value from changes classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(5)
-URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_ServicingAssetsAtFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_CounterpartyNameAxis=ocn_NewResidentialInvestmentCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: