XML 112 R90.htm IDEA: XBRL DOCUMENT v2.4.0.8

Changes of Unamortized Discount and Designated Credit Reserves on Residential Available for Sale Securities (Detail) (Residential, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Residential
Credit Reserve
Beginning balance	$ 95,688	$ 116,870
Amortization of net discount
Realized credit losses	(3,973)	(7,310)
Acquisitions	257	257
Sales, calls, other	(476)	(1,412)
Impairments	264	377
Transfers to (release of) credit reserves, net	(8,484)	(25,506)
Ending Balance	83,276	83,276
Unamortized Discount Net
Beginning balance	303,733	298,469
Amortization of net discount	(10,586)	(21,884)
Realized credit losses
Acquisitions	3,246	2,837
Sales, calls, other	(584)	(635)
Impairments
Transfers to (release of) credit reserves, net	8,484	25,506
Ending Balance	$ 304,293	$ 304,293

X

- Definition

Balance of credit reserve on available-for-sale securities.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserve
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveAbstract
Namespace Prefix:	rwt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Changes to the credit reserve on available-for-sale securities due to security acquisitions.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveAcquisitions
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to credit reserve on available-for-sale securities due to the amortization of net discount

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveAmortizationOfNetDiscountPremium
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the credit reserve on available-for-sale securities due to impairments.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveImpairments
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the credit reserve on available-for-sale securities due to realized credit losses.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveRealizedCreditGainsLosses
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the credit reserve on available-for-sale securities due to sales, calls, and other items.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveSalesCallsOther
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Transfers to or releases of the credit reserve on available-for-sale securities.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesCreditReserveTransfersToReleaseOfCreditReserves
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Balance of net unamortized discount on available-for-sale securities.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiums
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsAbstract
Namespace Prefix:	rwt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Changes to the net unamortized discount on available-for-sale securities due to security acquisitions.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsAcquisitions
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the net unamortized discount on available-for-sale securities due to the amortization of net discount.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsAmortizationOfNetDiscountPremium
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the net unamortized discount on available-for-sale securities due to impairments.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsImpairments
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the net unamortized discount on available-for-sale securities due to realized credit losses.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsRealizedCreditGainsLosses
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Changes to the net unamortized discount on available-for-sale securities due to sales, calls, and other items.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsSalesCallsOther
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Transfers to or releases of the credit reserve on available-for-sale securities.

+ References

No definition available.

+ Details

Name:	rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsTransfersToReleaseOfCreditReserves
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration