Transfers of Residential Loans - Additional Information (Detail) (USD $)	6 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Residential Loan Transfers Line Items
HMBS related obligations at fair value	$ 9,472,666,000	$ 8,652,746,000
Residential Loan Transfers Accounted for as Sales [Member]
Residential Loan Transfers Line Items
Transferred residential loans	35,100,000	9,100,000
Forward loans serviced number of days past due threshold	60 days or more
Residential Loans Transfers Accounted for as Secured Borrowings [Member]
Residential Loan Transfers Line Items
Loans pledged as collateral, unpaid principal balance	8,600,000,000
Residential loans and real estate owned pledged as collateral	$ 9,400,000,000

This is the amount of the financial instruments that are considered delinquent (past due) at the end of the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (e)(4)

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5086-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Forward loans serviced number days past due threshold.

+ References

No definition available.

+ Details

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Namespace Prefix:	wac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Home equity conversion mortgage backed security related obligations.

+ References

No definition available.

+ Details

Name:	wac_HomeEquityConversionMortgageBackedSecurityRelatedObligations
Namespace Prefix:	wac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loans Pledged As Collateral, Unpaid Principal Balance

+ References

No definition available.

+ Details

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Namespace Prefix:	wac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration