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Fair - Value Assets Measured at Fair Value on Non-Recurring Basis (Details) (Real Estate Owned [Member])
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Weighted Average [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Fair Value Inputs, Loss severity 8.04%us-gaap_FairValueInputsLossSeverity
/ us-gaap_FairValueByAssetClassAxis
= wac_RealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember		 9.48%us-gaap_FairValueInputsLossSeverity
/ us-gaap_FairValueByAssetClassAxis
= wac_RealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_WeightedAverageMember
Maximum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Fair Value Inputs, Loss severity 59.58%us-gaap_FairValueInputsLossSeverity
/ us-gaap_FairValueByAssetClassAxis
= wac_RealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 88.68%us-gaap_FairValueInputsLossSeverity
/ us-gaap_FairValueByAssetClassAxis
= wac_RealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Minimum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Fair Value Inputs, Loss severity 0.00%us-gaap_FairValueInputsLossSeverity
/ us-gaap_FairValueByAssetClassAxis
= wac_RealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 0.00%us-gaap_FairValueInputsLossSeverity
/ us-gaap_FairValueByAssetClassAxis
= wac_RealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember