Fair Value - Schedule of Significant Assumptions used in Valuation (Details) - $ / loan	3 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Mortgage Servicing Rights - Amortized Costs [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted average prepayment speed	12.67%	14.94%
Weighted average delinquency rate	14.39%	23.20%
Advance financing cost	5 years
Interest rate for computing float earnings	5 years
Weighted average discount rate	9.30%	11.52%
Weighted average cost to service (in dollars)	98
Fair Value Agency Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted average prepayment speed	10.80%
Weighted average delinquency rate	1.10%
Advance financing cost	5 years
Interest rate for computing float earnings	5 years
Weighted average discount rate	9.00%
Weighted average cost to service (in dollars)	70
Fair Value Non-Agency Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted average prepayment speed	16.48%
Weighted average delinquency rate	29.80%
Weighted average discount rate	14.94%
Weighted average cost to service (in dollars)	336
Mortgage Servicing Rights Pledged [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted average prepayment speed	16.98%
Weighted average delinquency rate	30.75%
Weighted average discount rate	14.77%	15.40%
Weighted average cost to service (in dollars)	341
London Interbank Offered Rate (LIBOR) [Member] \| Fair Value Non-Agency Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate for computing float earnings	1 month
Fair value input, interest rate	3.50%
London Interbank Offered Rate (LIBOR) [Member] \| Mortgage Servicing Rights Pledged [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate for computing float earnings	1 month
Fair value input, interest rate	3.50%

Represents the fair value inputs basis spread on advance borrowings.

No definition available.

Name:	ocn_FairValueInputsBasisSpreadOnVariableRate
Namespace Prefix:	ocn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair Value Inputs, Financing Costs, Comparative Derivative Term

+ References

No definition available.

+ Details

Name:	ocn_FairValueInputsFinancingCostsComparativeDerivativeTerm
Namespace Prefix:	ocn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair Value Inputs, Financing Costs, Float Earnings

+ References

No definition available.

+ Details

Name:	ocn_FairValueInputsFinancingCostsFloatEarnings
Namespace Prefix:	ocn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value inputs, weighted average cost to service (in dollars).

+ References

No definition available.

+ Details

Name:	ocn_FairValueInputsWeightedAverageCostToService
Namespace Prefix:	ocn_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- 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_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value.

+ References

+ Details

Name:	us-gaap_FairValueInputsPrepaymentRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value.

+ References

+ Details

Name:	us-gaap_FairValueInputsProbabilityOfDefault
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancialInstrumentAxis=ocn_MortgageServicingRightsAmortizedCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=ocn_FairValueAgencyMortgageServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=ocn_FairValueNonAgencyMortgageServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=ocn_MortgageServicingRightsPledgedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: