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Advances - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
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Advances [Abstract] |  |
Sold advances | $ 12.3 | $ 18.1

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- Definition Advances [Abstract] + References No definition available. + Details
Name: | ocn_AdvancesAbstract
Namespace Prefix: | ocn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Carrying amount as of the balance sheet date of non-interest-bearing advances that are sold which did not qualify for sales accounting. + References No definition available. + Details
Name: | ocn_SoldAdvances
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant