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v2.4.1.9

Components of Net Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets |  |
Net operating loss carryforward - state | $ 91,579 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | $ 90,138 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Net capital loss carryforward - state | 27,308 rwt_DeferredTaxAssetsCapitalLossCarryforwardsStateAndLocal | 34,189 rwt_DeferredTaxAssetsCapitalLossCarryforwardsStateAndLocal
Net operating loss carryforward - federal | 18,765 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | 10,254 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
Net capital loss carryforward - federal | 7,903 rwt_DeferredTaxAssetsCapitalLossCarryforwardsDomestic | 6,905 rwt_DeferredTaxAssetsCapitalLossCarryforwardsDomestic
Allowances and accruals | 2,355 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | 5,667 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Other | 210 us-gaap_DeferredTaxAssetsOther | 170 us-gaap_DeferredTaxAssetsOther
Total deferred tax assets | 148,120 us-gaap_DeferredTaxAssetsGross | 147,323 us-gaap_DeferredTaxAssetsGross
Deferred Tax Liabilities |  |
Real estate assets | (44,402)rwt_DeferredTaxLiabilitiesRealEstateAssets | (34,935)rwt_DeferredTaxLiabilitiesRealEstateAssets
Interest rate agreements | (87)us-gaap_DeferredTaxLiabilitiesDerivatives | (535)us-gaap_DeferredTaxLiabilitiesDerivatives
Tax effect of unrealized gains - OCI | (2,684)us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome |
Total deferred tax liabilites | (47,173)us-gaap_DeferredTaxLiabilities | (35,470)us-gaap_DeferredTaxLiabilities
Valuation allowance | (111,183)us-gaap_DeferredTaxAssetsValuationAllowance | (119,169)us-gaap_DeferredTaxAssetsValuationAllowance
Total Deferred Tax Liabilities, net of Valuation Allowance | $ (10,236)us-gaap_DeferredTaxAssetsNet | $ (7,316)us-gaap_DeferredTaxAssetsNet

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Asset -URI http://asc.fasb.org/extlink&oid=6510090 + Details
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