Rights to MSRs - Schedule of Activity Related to Rights to Mortgage Servicing Rights (Footnote) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Servicing Assets at Fair Value [Line Items]
Gain on valuation of financing liability			$ 27,024	$ 0
Contractual servicing fee rate of transferred MSRs			0.334%
Weighted average contractual servicing fee rates			0.471%
NRZ [Member]
Servicing Assets at Fair Value [Line Items]
Gain on valuation of financing liability	$ 27,024	$ (807)	$ 37,645	$ (1,555)