Amortization of Leasehold Improvement

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- Definition

Debt Instrument Accrued Interest

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- Definition

Debt Instrument Aggregate Principal Amount

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- Definition

Debt Instrument Unpaid Interest Paid By Cash

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- Definition

The date upon which a lease or a group of leases is set to expire.

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- Definition

Mortgage Loan Repurchase Reserve

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- Definition

The percentage at which the plaintiff would like to collect interest on their initial investment.

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- Definition

Provision For Loan Repurchases

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- 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 45

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- Definition

Fair value amount of debt instrument that was repurchased.

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- Definition

Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

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- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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- Definition

Number of defendants named in a legal action.

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- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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-Publisher FASB

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- Definition

The cash outflow to settle a bank borrowing during the year.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 15, 2010 Plaintiff	Oct. 15, 2010 Plaintiff
Loss Contingencies [Line Items]
Future lease commitments with expiration date		$ 13,051,000
Operating lease expense		3,000,000us-gaap_OperatingLeasesRentExpenseNet	2,000,000us-gaap_OperatingLeasesRentExpenseNet	1,000,000us-gaap_OperatingLeasesRentExpenseNet
Residential repurchase reserve	1,771,000rwt_MortgageLoanRepurchaseReserve	3,724,000rwt_MortgageLoanRepurchaseReserve	1,771,000rwt_MortgageLoanRepurchaseReserve
Repurchase provisions	2,000,000rwt_ProvisionForLoanRepurchases	2,000,000rwt_ProvisionForLoanRepurchases
Amount charged to repurchase reserve for loan repurchased	0us-gaap_DebtInstrumentRepurchaseAmount	61,000us-gaap_DebtInstrumentRepurchaseAmount	0us-gaap_DebtInstrumentRepurchaseAmount
Aggregate amount of loss contingency reserves	12,000,000us-gaap_LitigationReserve	2,000,000us-gaap_LitigationReserve	12,000,000us-gaap_LitigationReserve
Schwab
Loss Contingencies [Line Items]
Number of other named defendants along with SRF					26
Mortgage Servicing Rights
Loss Contingencies [Line Items]
Residential repurchase reserve	2,000,000	4,000,000	2,000,000
Maximum
Loss Contingencies [Line Items]
Operating lease expiration dates		2021
Unamortized leasehold improvement		1,000,000
Leasehold amortization expense		1,000,000	1,000,000
Minimum
Loss Contingencies [Line Items]
Number of other named defendants along with SRF						45
Sequoia \| FHLB Seattle \| Residential
Loss Contingencies [Line Items]
Statutory interest rate per annum		8.00%
Original principal amount of securities		133,000,000
Debt instrument principal payment amount		115,800,000
Debt instrument interest payment amount		11,100,000
Sequoia \| Schwab \| Residential
Loss Contingencies [Line Items]
Original principal amount of securities		14,800,000
Principal balance of securities		12,900,000
Debt instrument interest amount		$ 1,300,000