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Mortgage-Backed Debt and Related Collateral - Schedule of Mortgage-Backed Debt Issued by Consolidated Residual and Non-Residual Trusts (Parenthetical) (Detail) (Mortgage Backed Debt at Amortized Cost [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Residual Trusts [Member]    
Mortgage Backed Debt And Related Collateral [Line Items]    
Unpaid principal balance $ 1,204,539wac_BeneficialInterestUnpaidPrincipalBalance
/ us-gaap_FinancialInstrumentAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtAmortizedCostMember		 $ 1,316,988wac_BeneficialInterestUnpaidPrincipalBalance
/ us-gaap_FinancialInstrumentAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtAmortizedCostMember
Non-Residual Trusts [Member]    
Mortgage Backed Debt And Related Collateral [Line Items]    
Unpaid principal balance $ 735,379wac_BeneficialInterestUnpaidPrincipalBalance
/ us-gaap_FinancialInstrumentAxis
= wac_NonResidualTrustMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtAmortizedCostMember		 $ 825,200wac_BeneficialInterestUnpaidPrincipalBalance
/ us-gaap_FinancialInstrumentAxis
= wac_NonResidualTrustMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtAmortizedCostMember