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Residential Loans at Amortized Cost, Net - Summary of Residential Loans, Net (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Residential loans at amortized cost, net $ 1,361,153us-gaap_LoansReceivableNet   $ 1,394,871us-gaap_LoansReceivableNet     $ 1,490,321us-gaap_LoansReceivableNet    
Residential loans, principal balance 1,499,184us-gaap_LoansAndLeasesReceivableGrossCarryingAmount   1,542,056us-gaap_LoansAndLeasesReceivableGrossCarryingAmount     1,662,183us-gaap_LoansAndLeasesReceivableGrossCarryingAmount    
Unamortized discounts and other cost basis adjustments, net (126,101)us-gaap_LoansAndLeasesReceivableDeferredIncome   (132,865)us-gaap_LoansAndLeasesReceivableDeferredIncome     (151,427)us-gaap_LoansAndLeasesReceivableDeferredIncome    
Allowance for loan losses (11,930)us-gaap_LoansAndLeasesReceivableAllowance (12,084)us-gaap_LoansAndLeasesReceivableAllowance (14,320)us-gaap_LoansAndLeasesReceivableAllowance (18,306)us-gaap_LoansAndLeasesReceivableAllowance (19,932)us-gaap_LoansAndLeasesReceivableAllowance (20,435)us-gaap_LoansAndLeasesReceivableAllowance (13,824)us-gaap_LoansAndLeasesReceivableAllowance (15,907)us-gaap_LoansAndLeasesReceivableAllowance
Forward Loans in Residual Trusts [Member]                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Residential loans at amortized cost, net     1,377,711us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_ResidentialLoansRelatedToResidualTrustsMember
    1,475,782us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_ResidentialLoansRelatedToResidualTrustsMember
   
Unencumbered Forward Loans [Member]                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Residential loans at amortized cost, net $ 21,500us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_UnencumberedForwardLoansMember
  $ 17,160us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_UnencumberedForwardLoansMember
    $ 14,539us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= wac_UnencumberedForwardLoansMember