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Regulatory Requirements - Narrative (Details)
$ in Millions
3 Months Ended 39 Months Ended
Mar. 31, 2017
USD ($)
Mar. 31, 2017
USD ($)
Brokers and Dealers [Abstract]    
Third party monitoring costs related to regulatory matters and resolutions   $ 175.4
Number of days from fiscal year end that servicer is obliged to provide audited financial statements 90 days  
Net worth requirement $ 372.7 $ 372.7