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Fair Value Fair Value - Fair Value, Option, Instrument Specific Credit Risk (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) from changes in instrument-specific credit risk associated with loans and receivables under the fair value option $ (367)us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets $ (435)us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
Gains (losses) from changes in instrument-specific credit risk associated with liabilities under the fair value option 113us-gaap_FairValueOptionCreditRiskGainsLossesOnLiabilities 524us-gaap_FairValueOptionCreditRiskGainsLossesOnLiabilities
Mortgage-Backed Debt Related to Non-Residual Trusts [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) from changes in instrument-specific credit risk associated with liabilities under the fair value option 113us-gaap_FairValueOptionCreditRiskGainsLossesOnLiabilities
/ us-gaap_FairValueByLiabilityClassAxis
= wac_MortgageBackedDebtRelatedToNonResidualTrustsMember		 524us-gaap_FairValueOptionCreditRiskGainsLossesOnLiabilities
/ us-gaap_FairValueByLiabilityClassAxis
= wac_MortgageBackedDebtRelatedToNonResidualTrustsMember
Loans Receivable [Member] | Forward Loans in Non-Residual Trusts [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) from changes in instrument-specific credit risk associated with loans and receivables under the fair value option (196)us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_ResidentialLoansRelatedToNonResidualTrustsMember
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_LoansReceivableMember		 683us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_ResidentialLoansRelatedToNonResidualTrustsMember
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_LoansReceivableMember
Loans Receivable [Member] | Charged Off Loans [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) from changes in instrument-specific credit risk associated with loans and receivables under the fair value option 0us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_ChargedOffLoansMember
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_LoansReceivableMember		 0us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_ChargedOffLoansMember
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_LoansReceivableMember
Receivables Related to Non-Residual Trusts [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) from changes in instrument-specific credit risk associated with loans and receivables under the fair value option $ (171)us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AccountsReceivableMember		 $ (1,118)us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AccountsReceivableMember