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Schedule IV - Mortgage Loans on Real Estate (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) loans | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Carrying Value | $ 3,049,166 | $ 12,707,625 | $ 10,157,126 | $ 3,049,166
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 406,293
Reconciliation of Balance Sheet Reported Amounts of Mortgage Loans on Real Estate |  |  |  |
Beginning balance | 20,780,548 | 12,707,625 | 10,157,126 |
Additions during period: |  |  |  |
Purchases | 569,557 | 8,762,553 | 2,983,295 |
Accretion of purchase discount | 5,265 | 11,234 | 19,940 |
Change in realized and unrealized gains | 101,957 | 638,557 | 4,096 |
Deductions during period: |  |  |  |
Repayments of principal | (674,337) | (1,052,812) | (182,163) |
Collection of interest | 0 | (11,429) | (21,754) |
Transfer to investment securities available for sale (2) | (237,297) | 0 | 0 |
Transfer to REO | (8,509) | (6,105) | (7,998) |
Cost of loans sold | (17,478,478) | (213,871) | (109,000) |
Provision for loan loss | 0 | 2,780 | (1,235) |
Change in realized and unrealized losses | 0 | 0 | (85,115) |
Amortization of premium | (15,352) | (57,984) | (49,567) |
Balance at end of period | 3,049,166 | 20,780,548 | 12,707,625 |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Carrying Value | 5,812 | 0 | 0 |
Reconciliation of Balance Sheet Reported Amounts of Mortgage Loans on Real Estate |  |  |  |
Beginning balance | $ 5,812 | 0 | 0 |
Deductions during period: |  |  |  |
Balance at end of period |  | $ 5,812 | $ 0 |
Residential Loans Held in Securitization Trusts |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 1,204 |  |  |
Carrying Value | $ 64,247 |  |  | 64,247
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 8,744
Deductions during period: |  |  |  |
Balance at end of period | $ 64,247 |  |  |
Residential Loans Held in Securitization Trusts | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.63% |  |  |
Residential Loans Held in Securitization Trusts | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 13.33% |  |  |
Mortgage Loans Under $100,000 | First mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 1,335 |  |  |
Carrying Value | $ 66,968 |  |  | 66,968
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 6,285
Deductions during period: |  |  |  |
Balance at end of period | $ 66,968 |  |  |
Mortgage Loans Under $100,000 | First mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.38% |  |  |
Mortgage Loans Under $100,000 | First mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 14.99% |  |  |
Mortgage Loans Under $100,000 | Second mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 421 |  |  |
Carrying Value | $ 18,222 |  |  | 18,222
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 579
Deductions during period: |  |  |  |
Balance at end of period | $ 18,222 |  |  |
Mortgage Loans Under $100,000 | Second mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 5.75% |  |  |
Mortgage Loans Under $100,000 | Second mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 9.00% |  |  |
Mortgage Loans Under $100,000 | Business Purpose Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 176 |  |  |
Carrying Value | $ 20,610 |  |  | 20,610
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 160
Deductions during period: |  |  |  |
Balance at end of period | $ 20,610 |  |  |
Mortgage Loans Under $100,000 | Business Purpose Loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 7.75% |  |  |
Mortgage Loans Under $100,000 | Business Purpose Loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 15.00% |  |  |
Mortgage Loans Under $100,000 | Residential Loans Held in Securitization Trusts |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 1,591 |  |  |
Carrying Value | $ 181,487 |  |  | 181,487
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 21,816
Deductions during period: |  |  |  |
Balance at end of period | $ 181,487 |  |  |
Mortgage Loans Under $100,000 | Residential Loans Held in Securitization Trusts | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.88% |  |  |
Mortgage Loans Under $100,000 | Residential Loans Held in Securitization Trusts | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 12.80% |  |  |
Mortgage Loans Between $100,000 - $199,999 | First mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 1,323 |  |  |
Carrying Value | $ 163,575 |  |  | 163,575
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 13,176
Deductions during period: |  |  |  |
Balance at end of period | $ 163,575 |  |  |
Mortgage Loans Between $100,000 - $199,999 | First mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 2.00% |  |  |
Mortgage Loans Between $100,000 - $199,999 | First mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 11.84% |  |  |
Mortgage Loans Between $100,000 - $199,999 | Second mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 50 |  |  |
Carrying Value | $ 6,212 |  |  | 6,212
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 0
Deductions during period: |  |  |  |
Balance at end of period | $ 6,212 |  |  |
Mortgage Loans Between $100,000 - $199,999 | Second mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 6.25% |  |  |
Mortgage Loans Between $100,000 - $199,999 | Second mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 9.13% |  |  |
Mortgage Loans Between $100,000 - $199,999 | Business Purpose Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 290 |  |  |
Carrying Value | $ 53,684 |  |  | 53,684
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 1,218
Deductions during period: |  |  |  |
Balance at end of period | $ 53,684 |  |  |
Mortgage Loans Between $100,000 - $199,999 | Business Purpose Loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 7.85% |  |  |
Mortgage Loans Between $100,000 - $199,999 | Business Purpose Loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 14.50% |  |  |
Mortgage Loans Between $100,000 - $199,999 | Residential Loans Held in Securitization Trusts |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 782 |  |  |
Carrying Value | $ 150,240 |  |  | 150,240
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 20,409
Deductions during period: |  |  |  |
Balance at end of period | $ 150,240 |  |  |
Mortgage Loans Between $100,000 - $199,999 | Residential Loans Held in Securitization Trusts | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.75% |  |  |
Mortgage Loans Between $100,000 - $199,999 | Residential Loans Held in Securitization Trusts | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 11.44% |  |  |
Mortgage Loans Between $200,000 - $299,999 | First mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 616 |  |  |
Carrying Value | $ 134,048 |  |  | 134,048
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 12,380
Deductions during period: |  |  |  |
Balance at end of period | $ 134,048 |  |  |
Mortgage Loans Between $200,000 - $299,999 | First mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 0.00% |  |  |
Mortgage Loans Between $200,000 - $299,999 | First mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 11.38% |  |  |
Mortgage Loans Between $200,000 - $299,999 | Second mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 18 |  |  |
Carrying Value | $ 3,953 |  |  | 3,953
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 0
Deductions during period: |  |  |  |
Balance at end of period | $ 3,953 |  |  |
Mortgage Loans Between $200,000 - $299,999 | Second mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 6.25% |  |  |
Mortgage Loans Between $200,000 - $299,999 | Second mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 8.63% |  |  |
Mortgage Loans Between $200,000 - $299,999 | Business Purpose Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 175 |  |  |
Carrying Value | $ 46,937 |  |  | 46,937
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 2,187
Deductions during period: |  |  |  |
Balance at end of period | $ 46,937 |  |  |
Mortgage Loans Between $200,000 - $299,999 | Business Purpose Loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 7.85% |  |  |
Mortgage Loans Between $200,000 - $299,999 | Business Purpose Loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 12.50% |  |  |
Mortgage Loans Between $200,000 - $299,999 | Residential Loans Held in Securitization Trusts |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 832 |  |  |
Carrying Value | $ 295,477 |  |  | 295,477
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 52,553
Deductions during period: |  |  |  |
Balance at end of period | $ 295,477 |  |  |
Mortgage Loans Between $200,000 - $299,999 | Residential Loans Held in Securitization Trusts | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.38% |  |  |
Mortgage Loans Between $200,000 - $299,999 | Residential Loans Held in Securitization Trusts | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 9.79% |  |  |
Mortgage Loans Over $299,999 | First mortgage loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 753 |  |  |
Carrying Value | $ 326,591 |  |  | 326,591
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 25,432
Deductions during period: |  |  |  |
Balance at end of period | $ 326,591 |  |  |
Mortgage Loans Over $299,999 | First mortgage loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.88% |  |  |
Mortgage Loans Over $299,999 | First mortgage loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 9.63% |  |  |
Mortgage Loans Over $299,999 | Business Purpose Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 339 |  |  |
Carrying Value | $ 250,130 |  |  | 250,130
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | 4,615
Deductions during period: |  |  |  |
Balance at end of period | $ 250,130 |  |  |
Mortgage Loans Over $299,999 | Business Purpose Loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 7.00% |  |  |
Mortgage Loans Over $299,999 | Business Purpose Loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 12.99% |  |  |
First mortgage loans | Consolidated SLST |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of Loans | loans | 7,645 |  |  |
Carrying Value | $ 1,266,785 |  |  | 1,266,785
Deductions during period: |  |  |  |
Balance at end of period | $ 1,266,785 |  |  |
First mortgage loans | Consolidated SLST | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  |  |  | $ 236,739
First mortgage loans | Consolidated SLST | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 1.38% |  |  |
First mortgage loans | Consolidated SLST | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Interest Rate | 10.50% |  |  |

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- Definition Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Footnote 6)) -URI http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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- Definition Amount of increase in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from new investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Footnote 6)) -URI http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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