Real Estate Acquired, Loan Value

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

The cash outflow from the payment of debt issued by consolidated variable interest entities.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

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Balance Type:	credit
Period Type:	duration

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Securitized Debt - Narrative (Detail) - USD ($)	3 Months Ended
Securitized Debt - Narrative (Detail) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Gains (losses) on extinguishment of debt	$ 9,670,000	$ 0
Securitized Loans \| Non-agency MBS
Debt Instrument [Line Items]
Acquired securitized debt collateral outstanding principal balance	0	0
Securitized Loans \| Variable Interest Entities, Primary Beneficiary, Aggregated Disclosure \| Non-agency MBS
Debt Instrument [Line Items]
Principal balance of debt	$ 209,000,000		$ 219,000,000
Weighted average cost of financing	6.20%		6.20%
Securitized Loans \| Variable Interest Entities, Primary Beneficiary, Aggregated Disclosure \| Loans held for investment
Debt Instrument [Line Items]
Principal balance of debt	$ 9,300,000,000		$ 9,400,000,000
Weighted average cost of financing	4.20%
Securitized Loans \| Variable Interest Entities, Primary Beneficiary \| Loans held for investment
Debt Instrument [Line Items]
Acquired securitized debt collateral outstanding principal balance	$ 149,000,000	$ 0
Repurchase of securitized debt borrowings, collateralized by Non-Agency RMBS	139,000,000
Gains (losses) on extinguishment of debt	$ 10,000,000
Seasoned Subprime Residential Mortgage Loans \| Loans Held for Investment at Fair Value
Debt Instrument [Line Items]
REO			$ 10,000,000