Servicing Advance Liabilities - Schedule of Servicing Advance Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Summary of Servicing Advance liabilities Table [Line Items]
Servicing advance liabilities	$ 783,229	$ 1,229,280
Deferred issuance costs	6,879	10,261
Servicing Advance Liabilities [Member]
Summary of Servicing Advance liabilities Table [Line Items]
Deferred issuance costs	1,500	2,900
Servicing Advance Facilities [Member]
Summary of Servicing Advance liabilities Table [Line Items]
Servicing advance liabilities	708,462	1,072,541
Early Advance Reimbursement Agreement [Member]
Summary of Servicing Advance liabilities Table [Line Items]
Servicing advance liabilities	$ 74,767	$ 156,739