XML 87 R75.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Real Estate Securities - Changes of Unamortized Discount and Designated Credit Reserves on Residential Available for Sale Securities (Details) - Residential - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2017 | Jun. 30, 2017
Credit Reserve |  |
Beginning balance | $ 47,473 | $ 47,473
Amortization of net discount | 0 | 0
Realized credit losses | (1,521) | (2,437)
Acquisitions | 872 | 6,591
Sales, calls, other | (1,101) | (3,261)
Impairments | 128 | 245
Transfers to (release of) credit reserves, net | (16) | (1,023)
Ending Balance | 49,226 | 47,588
Unamortized Discount, Net |  |
Beginning balance | 198,112 | 198,112
Amortization of net discount | (4,805) | (10,066)
Realized credit losses | 0 | 0
Acquisitions | 884 | 8,643
Sales, calls, other | (963) | (5,649)
Impairments | 0 | 0
Transfers to (release of) credit reserves, net | 16 | 1,023
Ending Balance | $ 196,931 | $ 192,063

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
- 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 Available For Sale Securities Credit Reserve [Roll Forward] + References No definition available. + Details
Name: | rwt_AvailableForSaleSecuritiesCreditReserveRollForward
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 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
- Definition Available For Sale Securities Unamortized Discounts Premiums [Abstract] [Roll Forward] + References No definition available. + Details
Name: | rwt_AvailableForSaleSecuritiesUnamortizedDiscountsPremiumsAbstractRollForward
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

X
- Details
Name: | invest_InvestmentSecuritiesClassAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |