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Asset-Backed Securities Issued - Summary of Carrying Value Components of Collateral for Asset-Backed Securities Issued and Outstanding (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | $ 2,082,771 | $ 1,259,774
Residential loans |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 2,073,174 | 1,252,879
Restricted cash |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 157 | 151
Accrued interest receivable |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 6,791 | 3,391
REO |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 2,649 | 3,353
Legacy Sequoia |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 595,660 | 637,184
Legacy Sequoia | Residential loans |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 592,029 | 632,817
Legacy Sequoia | Restricted cash |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 147 | 147
Legacy Sequoia | Accrued interest receivable |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 835 | 867
Legacy Sequoia | REO |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 2,649 | 3,353
Sequoia Choice |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 1,487,111 | 622,590
Sequoia Choice | Residential loans |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 1,481,145 | 620,062
Sequoia Choice | Restricted cash |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 10 | 4
Sequoia Choice | Accrued interest receivable |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | 5,956 | 2,524
Sequoia Choice | REO |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Collateral for ABS Issued | $ 0 | $ 0

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- Definition The carrying value of collateral as of the balance sheet date for the asset-backed securities issued. + References No definition available. + Details
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