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v2.4.1.9

Subsequent Events - Additional Information (Detail) (USD $) | 0 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jan. 05, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Feb. 25, 2015 | Jan. 06, 2015
Subsequent Event [Line Items] |  |  |  |  |
Restricted cash received from WMMRC |  | $ 2,447,000 us-gaap_RestrictedCashAndCashEquivalents | $ 115,000 us-gaap_RestrictedCashAndCashEquivalents |  |
Notes payable - principal |  | 31,220,000 wmih_NotesPayablePrincipalAmount | 105,502,000 wmih_NotesPayablePrincipalAmount |  |
Convertible preferred stock, shares issued |  | 1,000,000 us-gaap_PreferredStockSharesIssued | 0 us-gaap_PreferredStockSharesIssued |  |
2012 Plan |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of shares authorized and available for awards |  | 3,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = wmih_TwoThousandTwelvePlanMember |  |  |
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Escrow deposit | 598,500,000 us-gaap_EscrowDeposit / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Loans Outstanding under financing agreement | 0 us-gaap_LineOfCredit / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Subsequent Event | 2012 Plan |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of shares authorized and available for awards |  |  |  | 12,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = wmih_TwoThousandTwelvePlanMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Subsequent Event | Runoff Notes [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Repayment of notes payable-principal |  |  |  |  | 2,300,000 wmih_RepaymentOfNotesPayablePrincipalAmount / us-gaap_LongtermDebtTypeAxis = wmih_RunoffNotesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Repayment of notes payable-interest |  |  |  |  | 29,000 wmih_RepaymentOfNotesPayableInterestAmount / us-gaap_LongtermDebtTypeAxis = wmih_RunoffNotesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Subsequent Event | First Lien Runoff Notes [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Notes payable - principal |  |  |  |  | 665,000 wmih_NotesPayablePrincipalAmount / us-gaap_LongtermDebtTypeAxis = wmih_FirstLienRunoffNotesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Subsequent Event | Second Lien Runoff Notes [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Notes payable - principal |  |  |  |  | $ 28,300,000 wmih_NotesPayablePrincipalAmount / us-gaap_LongtermDebtTypeAxis = wmih_SecondLienRunoffNotesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Subsequent Event | Series B Preferred Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Issuance of common stock, Shares | 600,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Convertible preferred stock, shares issued | 600,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Subsequent Event | Series B Preferred Stock [Member] | Affiliates of KKR [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Convertible preferred stock, shares issued | 200,000 us-gaap_PreferredStockSharesIssued / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = us-gaap_OtherAffiliatesMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Subsequent Event | Series B Preferred Stock [Member] | Citi |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Convertible preferred stock, shares issued | 400,000 us-gaap_PreferredStockSharesIssued / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = wmih_CitigroupGlobalMarketsIncMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Subsequent Event | Series B Preferred Stock [Member] | Scenario, Previously Reported | Affiliates of KKR [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Convertible preferred stock, shares issued | 400,000 us-gaap_PreferredStockSharesIssued / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = us-gaap_OtherAffiliatesMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Subsequent Event | Series B Preferred Stock [Member] | Scenario, Previously Reported | Citi |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Convertible preferred stock, shares issued | 200,000 us-gaap_PreferredStockSharesIssued / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = wmih_CitigroupGlobalMarketsIncMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |

X
- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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Balance Type: | na
Period Type: | instant

X
- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 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 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | instant

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

X
- Definition Notes payable principal amount. + References No definition available. + Details
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Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Repayment of notes payable interest amount. + References No definition available. + Details
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Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Repayment of notes payable principal amount. + References No definition available. + Details
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Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |