Advances - Schedule of Activity in Advances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Advances [Roll Forward]
Advances, beginning balance	$ 249,382	$ 211,793	$ 257,882
Asset acquisition	1,457	0	0
Acquired in connection with the acquisition of PHH	0	96,163	0
Transfers to match funded advances	0	(71,623)	0
Sales	(11,791)	(32,081)	(444)
Collections of advances, charge-offs and other, net	2,151	51,924	(67,132)
Net (increase) decrease in allowance for losses	13,334	(6,794)	21,487
Advances, ending balance	$ 254,533	$ 249,382	$ 211,793