Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7524895&loc=d3e120260-111741

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

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

- Definition

Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueAmortization1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_ServicingAssetAtAmortizedValueBalanceRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of other increase (decrease) to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(7)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueOtherChangesThatAffectBalanceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Servicing asset at amortized value reclassification to servicing asset at fair value.

+ References

No definition available.

+ Details

Name:	wac_ServicingAssetAtAmortizedValueReclassificationToServicingAssetAtFairValue
Namespace Prefix:	wac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=wac_ReverseMortgageSolutionsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=wac_SecurityOneLendingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=wac_PurchaseOfServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=wac_ForwardLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=wac_ReverseLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Servicing of Residential Loans - Summary of Activity in Carrying Value of Servicing Rights (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Amortization	$ (43,101)	$ (42,583)	$ (50,461)
Mortgage Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of the period	161,782	227,191	250,329
Purchases		36
Amortization	(40,418)	(39,057)	(49,755)
Reclassification		(26,382)
Other		(6)
Balance at end of the period	121,364	161,782	227,191
Reverse Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of the period	11,994	15,521	0
Purchases		0
Amortization	(2,683)	(3,526)	(706)
Reclassification		0
Other		(1)
Balance at end of the period	9,311	11,994	15,521
Acquisition of RMS [Member] \| Mortgage Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Purchases			0
Acquisition of RMS [Member] \| Reverse Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Purchases			15,916
Acquisition of SIL [Member] \| Mortgage Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Purchases			67
Acquisition of SIL [Member] \| Reverse Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Purchases			311
Purchase [Member] \| Mortgage Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Purchases			26,550
Purchase [Member] \| Reverse Loan [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Purchases			$ 0