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Warehouse Borrowings - Additional Information (Details) (Warehouse Agreement Borrowings [Member], USD $)
 0 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Master_Agreement
Short-term Debt [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 2,200,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity $ 2,200,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Weighted Average Stated Interest Rate During Period 2.59%us-gaap_DebtInstrumentInterestRateDuringPeriod  
Debt Instrument, Maturity Date   Sep. 30, 2015
Residential Loans Pledged As Collateral $ 1,200,000,000us-gaap_DebtInstrumentCollateralAmount $ 1,200,000,000us-gaap_DebtInstrumentCollateralAmount
Debt instrument, number of amendments to covenants 2wac_Debtinstrumentnumberofamendmentstocovenants 2wac_Debtinstrumentnumberofamendmentstocovenants
Minimum [Member]    
Short-term Debt [Line Items]    
Interest Spread   2.10%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_WarehouseAgreementBorrowingsMember
Maximum [Member]    
Short-term Debt [Line Items]    
Interest Spread   3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_WarehouseAgreementBorrowingsMember