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Rights to MSRs - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 18, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Oct. 04, 2018
Servicing Assets at Fair Value [Line Items]          
Proceeds from sale of mortgage servicing rights accounted for as financing   $ 279,586 $ 54,601 $ 0  
NRZ [Member]          
Servicing Assets at Fair Value [Line Items]          
Percentage UPB of residential assets serviced   50.9832%      
Percentage of loan servicing and subservicing fee revenue from client   69.74826%      
Initial term to subservice mortgage servicing rights   5 years      
Proceeds from sale of mortgage servicing rights accounted for as financing $ 279,600 $ 279,600 $ 54,600    
Term of extended subservicing agreement following initial term   3 months      
NRZ [Member] | PHH Corporation [Member]          
Servicing Assets at Fair Value [Line Items]          
Unpaid principal balance on servicing assets acquired         $ 42,300,000
Unpaid principal balance on servicing assets and advances committed to sale   $ 3,500,000      
Percentage of mortgage loans servicing that can be terminated   25.00%