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Residential Loans at Fair Value - Schedule of Concentrations of Credit Risk (Detail) (Residential Loans [Member])
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Concentration Risk [Line Items]    
Percentage of residential loans by state 100.00%us-gaap_ConcentrationRiskPercentage1 100.00%us-gaap_ConcentrationRiskPercentage1
California [Member]
    
Concentration Risk [Line Items]    
Percentage of residential loans by state 18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_CaliforniaMember		 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_CaliforniaMember
Texas [Member]
    
Concentration Risk [Line Items]    
Percentage of residential loans by state 11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_TexasMember		 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_TexasMember
Florida [Member]
    
Concentration Risk [Line Items]    
Percentage of residential loans by state 7.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_FloridaMember		 8.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_FloridaMember
New York [Member]
    
Concentration Risk [Line Items]    
Percentage of residential loans by state 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_NewYorkMember		 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_NewYorkMember
Other Less Than 5% [Member]
    
Concentration Risk [Line Items]    
Percentage of residential loans by state 59.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_OtherStatesMember		 58.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wac_ResidentialLoansMember
/ us-gaap_StatementGeographicalAxis
= wac_OtherStatesMember