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Mezzanine Equity - Schedule of Carrying Value of Preferred Shares (Footnote) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Temporary Equity Disclosure [Abstract]    
Accelerated write-off of unamortized discount $ 0.8ocn_WriteOffUnamortizedDiscountOfPreferredSharesConverted $ 3.5ocn_WriteOffUnamortizedDiscountOfPreferredSharesConverted