Match Funded Assets - Schedule of Match Funded Advances on Residential Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Match Funded Advances [Line Items]
Match funded assets	$ 801,990	$ 937,294
Residential Mortgage \| Principal and interest
Match Funded Advances [Line Items]
Match funded assets	334,617	412,897
Residential Mortgage \| Taxes and insurance
Match Funded Advances [Line Items]
Match funded assets	330,068	374,853
Residential Mortgage \| Foreclosures, bankruptcy, REO and other
Match Funded Advances [Line Items]
Match funded assets	$ 137,305	$ 149,544

Carrying amount of financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

Name:	us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant