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Mortgage-Backed Debt and Related Collateral - Schedule of Mortgage-Backed Debt Issued by Consolidated Residual and Non-Residual Trusts (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Mortgage-backed debt at amortized cost (unpaid principal balance of $1,099,997 and $1,204,539 at December 31, 2014 and 2013, respectively) $ 1,098,292wac_BeneficialInterestAtAmortizedCost $ 1,203,084wac_BeneficialInterestAtAmortizedCost
Mortgage-backed debt at fair value (unpaid principal balance of $657,174 and $735,379 at December 31, 2014 and 2013 respectively) 653,167wac_BeneficialInterestAtFairValue 684,778wac_BeneficialInterestAtFairValue
Mortgage-backed debt 1,751,459us-gaap_BeneficialInterest 1,887,862us-gaap_BeneficialInterest
Mortgage-Backed Debt [Member]    
Debt Instrument [Line Items]    
Weighted Average Stated Interest Rate 6.19%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember		 6.37%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember
Residual Trusts [Member] | Mortgage-Backed Debt [Member]    
Debt Instrument [Line Items]    
Weighted Average Stated Interest Rate 6.63%us-gaap_DebtWeightedAverageInterestRate
/ dei_LegalEntityAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember		 6.68%us-gaap_DebtWeightedAverageInterestRate
/ dei_LegalEntityAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember
Beneficial Interest Unpaid Principal Balance 1,099,997wac_BeneficialInterestUnpaidPrincipalBalance
/ dei_LegalEntityAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember		 1,204,539wac_BeneficialInterestUnpaidPrincipalBalance
/ dei_LegalEntityAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember
Non Residual Trusts [Member] | Mortgage-Backed Debt [Member]    
Debt Instrument [Line Items]    
Weighted Average Stated Interest Rate 5.45%us-gaap_DebtWeightedAverageInterestRate
/ dei_LegalEntityAxis
= wac_NonResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember		 5.85%us-gaap_DebtWeightedAverageInterestRate
/ dei_LegalEntityAxis
= wac_NonResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember
Beneficial Interest Unpaid Principal Balance $ 657,174wac_BeneficialInterestUnpaidPrincipalBalance
/ dei_LegalEntityAxis
= wac_NonResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember		 $ 735,379wac_BeneficialInterestUnpaidPrincipalBalance
/ dei_LegalEntityAxis
= wac_NonResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember