Loans Held for Sale - Schedule of Loans Held for Sale at Lower Cost or Fair Value, Activity (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Movement In Loans Held For Sale At Fair Value [Roll Forward]
Beginning balance - before Valuation Allowance	$ 20,278	$ 31,880	$ 27,652	$ 73,160
Proceeds from sales	(2,916)	891	(9,583)	(45,974)
Principal collections	(415)	(514)	(629)	(1,319)
Receivables, net	(444)	0	(936)	61
Gain (loss) on sale of loans	35	(1,141)	549	474
Other	123	(1,220)	(392)	3,494
Ending balance - before Valuation Allowance	16,661	29,896	16,661	29,896
Ending balance, net	$ 12,079	$ 23,665	$ 12,079	$ 23,665

Gain (loss) on sale of mortgage loans held-for-sale, at lower cost or fair value.

No definition available.

Name:	ocn_GainLossonSaleofMortgageLoansHeldforsaleatLowerCostorFairValue
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Loans held for sale at lower of cost or fair value.

No definition available.

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Loans held for sale at lower of cost or fair value.

No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Other adjustments to mortgage loans held-for-sale, at lower cost or fair value.

No definition available.

Name:	ocn_OtherAdjustmentstoMortgageLoansHeldforsaleatLowerCostorFairValue
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Data Type:	xbrli:monetaryItemType
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Proceeds from principal payments on mortgage loans held-for-sale, at lower of cost or fair value.

No definition available.

Name:	ocn_ProceedsfromPrincipalPaymentsonMortgageLoansHeldforsaleatLowerofCostorFairValue
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Proceeds from sale of mortgage loans held-for-sale, at lower of cost or fair value.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Transfers to accounts receivable from mortgage loans held-for-sale, at lower of cost or fair value.

No definition available.

Name:	ocn_TransferstoAccountsReceivablefromMortgageLoansHeldforsaleatLowerofCostorFairValue
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