Fair Value - Fair Value and Unpaid Principal Balance of Assets and Liabilities Carried Under Fair Value Option (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Option, Quantitative Disclosures [Line Items]
Residential loans at fair value	$ 11,268,401	$ 10,341,375	$ 6,710,211
Receivables related to Non-Residual Trusts	36,181	43,545	53,975
Assets, Fair Value	11,304,582	10,384,920	6,764,186
Mortgage-backed debt at fair value	651,784wac_BeneficialInterestAtFairValue	684,778wac_BeneficialInterestAtFairValue	757,286wac_BeneficialInterestAtFairValue
HMBS related obligations at fair value	9,472,666	8,652,746	5,874,552
Liabilities, Fair Value	10,124,450	9,337,524	6,631,838
Receivables related to Non-Residual Trusts	36,524	43,988	54,604
Assets, Unpaid Principal Balance	13,845,227	9,883,799	6,286,286
Mortgage-backed debt related to Non-Residual Trusts	695,366	735,379	825,200
HMBS related obligations	8,646,651	7,959,711	5,169,135
Liabilities, Unpaid Principal Balance	9,342,017	8,695,090	5,994,335
VIE Primary Beneficiary [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Residential loans at fair value	557,786	587,265	646,498
Receivables related to Non-Residual Trusts	36,181	43,545
Mortgage-backed debt at fair value	651,784	684,778	757,286
Reverse Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Residential loans at fair value	9,482,030	8,738,503	6,047,108
Residential Loans, Unpaid Principal Balance	8,741,715	8,135,927	5,400,876
Forward Loans in Non-Residual Trusts [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Residential loans at fair value	557,786	587,265	646,498
Residential Loans, Unpaid Principal Balance	687,940	727,110	814,481
Forward Loans Held for Sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Residential loans at fair value	1,173,588	1,015,607	16,605
Residential Loans, Unpaid Principal Balance	1,106,136	976,774	16,325
Charged Off Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Residential loans at fair value	54,997	0
Residential Loans, Unpaid Principal Balance	$ 3,272,912	$ 0

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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13487-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Subparagraph a, b

-Article 5

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Glossary Loan

-URI http://asc.fasb.org/extlink&oid=6517073

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Home equity conversion mortgage backed security related obligations.

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Loans receivable at fair value unpaid principal balance.

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