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Mortgage-Backed Debt and Related Collateral - Schedule of Mortgage-Backed Debt Issued by Consolidated Residual and Non-Residual Trusts (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Dec. 31, 2012
Mortgage Backed Debt And Related Collateral [Line Items]      
Total Residual Trusts at amortized cost   $ 1,203,084wac_BeneficialInterestAtAmortizedCost $ 1,315,442wac_BeneficialInterestAtAmortizedCost
Mortgage-backed debt at fair value 651,784wac_BeneficialInterestAtFairValue 684,778wac_BeneficialInterestAtFairValue 757,286wac_BeneficialInterestAtFairValue
Total mortgage-backed debt $ 1,803,470us-gaap_BeneficialInterest $ 1,887,862us-gaap_BeneficialInterest $ 2,072,728us-gaap_BeneficialInterest
Weighted Average Stated Interest Rate of Mortgage Backed Debt        
Mortgage Backed Debt at Amortized Cost [Member] | Residual Trusts [Member]      
Mortgage Backed Debt And Related Collateral [Line Items]      
Weighted Average Stated Interest Rate of Mortgage Backed Debt   6.68%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_FinancialInstrumentAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtAmortizedCostMember		 6.72%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_FinancialInstrumentAxis
= wac_ResidualTrustsMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtAmortizedCostMember
Mortgage Backed Debt at Fair Value [Member] | Non-Residual Trusts [Member]      
Mortgage Backed Debt And Related Collateral [Line Items]      
Weighted Average Stated Interest Rate of Mortgage Backed Debt   5.85%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_FinancialInstrumentAxis
= wac_NonResidualTrustMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtFairValueMember		 5.72%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_FinancialInstrumentAxis
= wac_NonResidualTrustMember
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtAtFairValueMember
Mortgage-backed debt [Member]      
Mortgage Backed Debt And Related Collateral [Line Items]      
Weighted Average Stated Interest Rate of Mortgage Backed Debt   6.37%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember		 6.33%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= wac_MortgageBackedDebtMember