Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties.

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Beneficial interest at fair value.

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Excess Servicing Spread

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Home equity conversion mortgage backed security related obligations.

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Fair Value - Summary of Assets and Liabilities in Each Level of Fair Value Hierarchy (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Assets
Loans Receivable, Fair Value Disclosure	$ 12,204,837	$ 11,832,630
Receivables related to Non-Residual Trusts	22,935	25,201
Servicing rights carried at fair value	1,570,320us-gaap_ServicingAssetAtFairValueAmount	1,599,541us-gaap_ServicingAssetAtFairValueAmount	1,513,830us-gaap_ServicingAssetAtFairValueAmount	1,131,124us-gaap_ServicingAssetAtFairValueAmount
Freestanding derivative instruments (IRLCs)	100,735	68,151
Liabilities
Freestanding derivative instruments (IRLCs)	37,937	30,024
Excess servicing spread liability	63,349wac_ExcessServicingSpreadLiability	66,311wac_ExcessServicingSpreadLiability
Mortgage-backed debt related to Non-Residual Trusts	635,239wac_BeneficialInterestAtFairValue	653,167wac_BeneficialInterestAtFairValue
HMBS related obligations	10,304,384	9,951,895
Reverse Loans [Member]
Assets
Loans Receivable, Fair Value Disclosure	10,429,893	10,064,365
Forward Loans in Non-Residual Trusts [Member]
Assets
Loans Receivable, Fair Value Disclosure	567,912	586,433
Forward Loans Held for Sale [Member]
Assets
Loans Receivable, Fair Value Disclosure	1,156,187	1,124,615
Charged Off Loans [Member]
Assets
Loans Receivable, Fair Value Disclosure	50,845	57,217
Level 2 [Member]
Assets
Freestanding derivative instruments (IRLCs)	15,810	7,751
Assets, Fair Value Disclosure, Recurring	1,171,997	1,132,366
Liabilities
Freestanding derivative instruments (IRLCs)	37,733	29,761
Liabilities, Fair Value Disclosure, Recurring	37,733	29,761
Level 2 [Member] \| Forward Loans Held for Sale [Member]
Assets
Loans Receivable, Fair Value Disclosure	1,156,187	1,124,615
Level 3 [Member]
Assets
Receivables related to Non-Residual Trusts	22,935	25,201
Servicing rights carried at fair value	1,570,320	1,599,541
Freestanding derivative instruments (IRLCs)	84,925	60,400
Assets, Fair Value Disclosure, Recurring	12,726,830	12,393,157
Liabilities
Freestanding derivative instruments (IRLCs)	204	263
Excess servicing spread liability	63,349	66,311
Mortgage-backed debt related to Non-Residual Trusts	635,239	653,167
HMBS related obligations	10,304,384	9,951,895
Liabilities, Fair Value Disclosure, Recurring	11,003,176	10,671,636
Level 3 [Member] \| Reverse Loans [Member]
Assets
Loans Receivable, Fair Value Disclosure	10,429,893	10,064,365
Level 3 [Member] \| Forward Loans in Non-Residual Trusts [Member]
Assets
Loans Receivable, Fair Value Disclosure	567,912	586,433
Level 3 [Member] \| Charged Off Loans [Member]
Assets
Loans Receivable, Fair Value Disclosure	$ 50,845	$ 57,217