Mr. Cooper (COOP) 10-Q 8 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	1-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	WMIH
Entity Registrant Name	WMI HOLDINGS CORP.
Entity Central Index Key	933136
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		202,612,479

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Investments held in trust, at fair value:
Fixed-maturity securities	$45,816,000	$52,578,000
Cash equivalents held in trust	8,838,000	11,122,000
Total investments held in trust	54,654,000	63,700,000
Cash and cash equivalents	2,765,000	78,009,000
Fixed-maturity securities, at fair value	74,183,000	8,063,000
Restricted cash	599,588,000	2,447,000
Accrued investment income	371,000	476,000
Deferred offering costs		2,568,000
Other assets	1,069,000	876,000
Total assets	732,630,000	156,139,000
Liabilities:
Notes payable – principal	29,838,000	31,220,000
Notes payable – interest	323,000	338,000
Losses and loss adjustment reserves	8,287,000	18,947,000
Losses payable	411,000	696,000
Unearned premiums	934,000	1,094,000
Accrued ceding commissions	39,000	44,000
Loss contract fair market value reserve	12,549,000	12,549,000
Derivative liability - embedded conversion feature	58,967,000
Other liabilities	29,202,000	3,021,000
Total liabilities	140,550,000	67,909,000
Commitments and contingencies
Shareholders’ equity:
Common stock, $0.00001 par value; 500,000,000 authorized; 202,343,245 shares issued and outstanding as of March 31, 2015 and December 31, 2014	2,000	2,000
Additional paid-in capital	107,012,000	106,628,000
Accumulated (deficit)	-17,147,000	-18,400,000
Total shareholders’ equity	89,867,000	88,230,000
Total liabilities, redeemable convertible preferred stock and shareholders’ equity	732,630,000	156,139,000
Redeemable Convertible Preferred Stock
Liabilities:
Redeemable convertible series B preferred stock, $0.00001 par value; 600,000 and zero shares issued and outstanding as of March 31, 2015 and December 31, 2014, respectively; aggregate liquidation preference of $600,000,000 and zero as of March 31, 2015 and December 31, 2014, respectively	502,213,000
Convertible Series A
Shareholders’ equity:
Convertible preferred stock value

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Convertible preferred stock, par value	$0.00	$0.00
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	202,343,245	202,343,245
Common stock, shares outstanding	202,343,245	202,343,245
Redeemable Convertible Preferred Stock
Redeemable Convertible preferred stock, par value	$0.00	$0.00
Redeemable Convertible preferred stock, shares issued	600,000	0
Redeemable Convertible preferred stock, shares outstanding	600,000	0
Redeemable Convertible preferred stock, liquidation value	$600,000,000	$0
Convertible Series A
Convertible preferred stock, par value	$0.00	$0.00
Convertible preferred stock, shares issued	1,000,000	1,000,000
Convertible preferred stock, shares outstanding	1,000,000	1,000,000
Convertible preferred stock, liquidation value	$10	$10

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Premiums earned	$1,349	$2,166
Net investment income	401	668
Total revenues	1,750	2,834
Expenses:
Losses and loss adjustment (benefit) expense	-541	1,104
Ceding commission expense	123	213
General and administrative expense	2,973	1,447
Unrealized gain on change in fair value of derivative liability - embedded conversion feature	-7,260
Interest expense	954	3,450
Total (benefit) expenses	-3,751	6,214
Income (loss) before federal income taxes	5,501	-3,380
Net income (loss)	5,501	-3,380
Series B preferred stock dividends	-4,248
Preferred deemed dividend		-9,455
Net income (loss) attributable to common shareholders	$1,253	($12,835)
Basic net income (loss) per share attributable to common shareholders	$0.01	($0.06)
Shares used in computing basic net income (loss) per share	201,146,565	200,474,070
Diluted net income (loss) per share attributable to common shareholders	$0	($0.06)
Shares used in computing diluted net income (loss) per share	502,438,861	200,474,070

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)	Total	Redeemable Convertible Preferred Stock	Convertible Series A	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated earnings (deficit) [Member]
In Thousands, except Share data
Beginning Balance at Dec. 31, 2013	$65,129			$2	$77,142	($12,015)
Beginning Balance, Shares at Dec. 31, 2013				201,842,351
Net income	3,070					3,070
Issuance of preferred stock and warrants to purchase common stock, net of offering costs	19,224		1,000,000		19,224
Issuance of preferred stock and warrants to purchase common stock, net of offering costs, Shares			1,000,000
Series B preferred stock dividends					9,455	-9,455
Issuance of common stock under restricted share compensation arrangement, Shares				500,894
Equity-based compensation	807				807
Convertible preferred stock, shares issued			1,000,000
Ending Balance at Dec. 31, 2014	88,230			2	106,628	-18,400
Ending Balance, Shares at Dec. 31, 2014	202,343,245			202,343,245
Net income	5,501					5,501
Series B preferred stock dividends	-4,248					-4,248
Issuance of preferred stock (par value as net proceeds treated as mezzanine)		600,000
Equity-based compensation	384				384
Preferred Stock Issued Shares Issued Value		502,213
Preferred Stock Value, Ending Balance		502,213
Redeemable Convertible preferred stock, shares outstanding		600,000
Ending Balance at Mar. 31, 2015	$89,867			$2	$107,012	($17,147)
Ending Balance, Shares at Mar. 31, 2015	202,343,245		1,000,000	202,343,245

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income (loss)	$5,501	($3,380)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Amortization of premium or discount on fixed maturity securities	179	529
Net realized (gain) loss on sale of investments	-186	-27
Unrealized (gain) loss on trading securities	76	-66
Unrealized (gain) loss on derivative liability - embedded conversion feature	-7,260
Equity-based compensation expense	384	129
Changes in assets and liabilities:
Accrued investment income	105	10
Other assets	-193	391
Change in cash equivalents held in trust	2,284	-4,798
Change in restricted cash	-597,141	9
Losses and loss adjustment reserves	-10,660	-9,477
Losses payable	-285	-1,091
Unearned premiums	-160	-127
Accrued ceding commission expense	-5	-52
Accrued interest on notes payable	-15	21
Other liabilities	715	-698
Total adjustments	-612,162	-15,247
Net cash (used in) provided by operating activities:	-606,661	-18,627
Cash flows from investing activities:
Purchase of investments	-100,472	-249,770
Proceeds from sales and maturities of investments	41,045	251,655
Net cash (used in) provided by investing activities:	-59,427	1,885
Cash flows from financing activities:
Proceeds from issuance of preferred stock and warrants to purchase common stock	600,000	22,572
Fees incurred and paid relating to preferred stock and warrant issuance	-4,276	-3,234
Series B preferred stock dividends paid in cash	-3,498
Deferred offering costs		-12,048
Notes payable b principal repayments	-2,300
Notes payable b principal issued	918	1,929
Net cash provided by (used in) financing activities:	590,844	9,219
(Decrease) increase in cash and cash equivalents	-75,244	-7,523
Cash and cash equivalents, beginning of period	78,009	78,009
Cash and cash equivalents, end of period	2,765
Cash paid during the period:
Interest	51	1,500
Supplementary disclosure of non-cash investing and financing activities:
Embedded derivatives on preferred stock issuances	66,227
Notes payable issued in lieu of cash interest payments	918	1,929
Non-cash preferred series B dividends accreted	750
Accrued fees relating to series B preferred stock issuance	27,284
Preferred deemed dividend recorded due to beneficial conversion feature		$9,455

The_Company_and_its_Subsidiari

The Company and its Subsidiaries	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
The Company and its Subsidiaries	Note 1: The Company and its Subsidiaries
	WMI Holdings Corp.
	WMI Holdings Corp. (“WMIHC”), is a corporation duly organized and existing under the laws of the State of Washington.  WMIHC is the direct parent of WM Mortgage Reinsurance Company, Inc. (“WMMRC”), a Hawaii corporation, and WMI Investment Corp. (“WMIIC”), a Delaware corporation.
	On March 19, 2012, (the “Effective Date”), WMIHC emerged from bankruptcy proceedings as the successor to Washington Mutual, Inc. (“WMI”). Upon emergence from bankruptcy, we had limited operations other than WMMRC’s legacy reinsurance business which is being operated in runoff and has not written any new business since September 26, 2008. We continue to operate WMMRC’s business in runoff mode and we are actively seeking acquisition opportunities across a broad array of industries.
	As of March 31, 2015, WMIHC was authorized to issue up to 500,000,000 shares of common stock, and up to 5,000,000 shares of preferred stock (in one or more series), in each case with a par value of $0.00001 per share. As of March 31, 2015, 202,343,245 shares of WMIHC’s common stock were issued and outstanding. On March 31, 2015 and December 31, 2014, 1,000,000 shares of WMIHC’s Series A Convertible Preferred Stock were issued and outstanding.  As of March 31, 2015 and December 31, 2014, 600,000 and zero shares, respectively, of WMIHC’s Series B Convertible Preferred Stock (the “Series B Preferred Stock”) were issued and outstanding.
	WMMRC
	WMMRC is a wholly-owned subsidiary of WMIHC. Prior to August 2008 (at which time WMMRC became a direct subsidiary of WMI), WMMRC was a wholly-owned subsidiary of FA Out-of-State Holdings, Inc., a second-tier subsidiary of Washington Mutual Bank (“WMB”) and third-tier subsidiary of WMI. WMMRC is a pure captive insurance company domiciled in the State of Hawaii. WMMRC was incorporated on February 25, 2000, and received a Certificate of Authority, dated March 2, 2000, from the Insurance Commissioner of the State of Hawaii.
	WMMRC was originally organized to reinsure private mortgage insurance risk for seven primary mortgage insurers then offering private mortgage insurance on loans originated or purchased by former subsidiaries of WMI. The seven primary mortgage insurers are United Guaranty Residential Insurance Company (“UGRIC”), Genworth Mortgage Insurance Corporation (“GMIC”), Mortgage Guaranty Insurance Corporation (“MGIC”), PMI Mortgage Insurance Company (“PMI”), Radian Guaranty Incorporated (“Radian”), Republic Mortgage Insurance Company (“RMIC”) and Triad Guaranty Insurance Company (“Triad”).
	Due to the then deteriorating performance in the mortgage guarantee markets and the closure and receivership of WMB, the reinsurance agreements with each of the primary mortgage insurers were terminated or placed into runoff during 2008. The agreements with UGRIC and Triad were placed into runoff effective May 31, 2008. The agreements with all other primary mortgage insurers were placed into runoff effective September 26, 2008. As a result, effective September 26, 2008, WMMRC ceased assuming new mortgage risks from the primary carriers. Consequently, as of September 26, 2008 WMMRC’s continuing operations consisted solely of the runoff of coverage associated with mortgages placed with the primary mortgage carriers prior to September 26, 2008. In runoff, an insurer generally writes no new business but continues to service its obligations under in force policies and otherwise continues as a licensed insurer. Management does not believe any additional adjustments to the carrying values of assets and liabilities which were recorded at fair market value as a result of fresh start accounting as of March 19, 2012 are required as a result of WMMRC’s runoff status. The reinsurance agreements with Triad, PMI and UGRIC were commuted on August 31, 2009, October 2, 2012 and April 3, 2014, respectively.  As a result, WMMRC’s continuing operations consist solely of the runoff of coverage associated with mortgages placed with 4 remaining carriers, GMIC, MGIC, Radian and RMIC.
	WMIIC
	WMIIC does not currently have any operations and is fully eliminated upon consolidation. Prior to September 26, 2008, WMIIC held a variety of securities and investments; however, such securities and investments have been liquidated and the value thereof distributed in connection with implementing the Company’s Seventh Amended Joint Plan of Affiliated Debtors Pursuant to Chapter 11 of the United States Bankruptcy Code (as modified, the “Plan”).

Significant_Accounting_Policie

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	Note 2: Significant Accounting Policies
	Basis of Presentation
	WMIHC resumed filing all periodic reports for a reporting company under the Exchange Act for all periods after the Effective Date. Subsequent to the Effective Date, we have timely filed our Exchange Act periodic reports.
	The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for quarterly reporting. Certain information and footnote disclosures normally included in the financial statements and prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted pursuant to such rules and regulations; however, the Company believes that the disclosures included are appropriate. The condensed consolidated balance sheet as of December 31, 2014, included herein, was derived from the audited consolidated financial statements as of that date.
	These interim unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the Company’s consolidated financial statements and notes thereto filed in the Company’s Annual Report on Form 10-K, filed with the SEC on February 27, 2015. Interim information presented in the unaudited condensed consolidated financial statements has been prepared by management. In the opinion of management, the financial statements include all adjustments necessary for a fair presentation and that all such adjustments are of a normal, recurring nature and necessary for the fair statement of the financial position, results of operations and cash flows for the periods presented in accordance with GAAP. The results of operations for the period ended March 31, 2015 are not necessarily indicative of the results to be expected for the full year ending December 31, 2015.
	All significant intercompany transactions and balances have been eliminated in preparing the condensed consolidated financial statements.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Management has made significant estimates in certain areas, including valuing certain financial instruments and other assets, the determination of the contingent risk liabilities, and in determining appropriate insurance reserves. Actual results could differ substantially from those estimates.
	Fair Value of Certain Financial Instruments
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Generally, for assets that are reported at fair value, the Company uses quoted market prices or valuation models to estimate their fair value. These models incorporate inputs such as forward yield curves, market volatilities and pricing spreads, utilizing market-based inputs where readily available. The degree of management judgment involved in estimating the fair value of a financial instrument or other asset is dependent upon the availability of quoted market prices or observable market inputs. For financial instruments that are actively traded in the marketplace or whose values are based on readily available market value data, little judgment is necessary when estimating the instrument’s fair value. When observable market prices and data are not readily available, significant management judgment often is necessary to estimate fair value. In those cases, different assumptions could result in significant changes in valuation.
	The Company classifies fixed-maturity investments as trading securities, which are recorded at fair value. As such, changes in unrealized gains and losses on investments held at the balance sheet date are recognized and reported as a component of net investment income on the statement of operations. The Company believes fair value provides better matching of investment earnings to potential cash flow generated from the investment portfolio and reduces subjectivity related to evaluating other-than-temporary impairment on the Company’s investment portfolio.
	The carrying value of cash and cash equivalents, restricted cash, accounts payable and accrued liabilities approximates their fair value because of their short term nature.
	The carrying value of the derivative liability - embedded conversion feature of the Series B Preferred Stock is adjusted to its fair value as determined using level 3 inputs described below under fair value measurements.
	The carrying value of notes payable approximates fair value based on time to maturity, underlying collateral, and prevailing interest rates.
	Fair Value Option
	The Company has recorded a liability related to a loss contract fair market value reserve (the “Reserve”) and applies Financial Accounting Standards Board (“FASB”) Fair Value Option accounting guidance to this liability. The Reserve was initially established in compliance with Accounting Standards Codification (“ASC”) 805-10-55-21(b)(1) which defines a loss contract as a “contract in which the unavoidable costs of meeting the obligations under the contract exceed the economic benefits expected to be received under it.” The Company recorded this Reserve to properly value the net economic value of the WMMRC subsidiary. At each reporting date, the Company reassesses the loss contract reserve which may result in a change to this line item in the balance sheet and a corresponding contra-expense which is reflected in the statement of operations. Accordingly, any changes in the reserve at the balance sheet date are recognized and reported within the loss contract reserve fair market value change in the statement of operations. The Company believes Fair Value Option accounting provides better matching of earnings to potential cash flow generated from the WMMRC operating business.
	Fair Value Measurement
	The Company’s estimates of fair value for financial assets and financial liabilities are based on the framework established in the FASB Fair Value Measurements and Disclosures accounting guidance. The framework is based on the inputs used in valuation and requires that observable inputs be used in the valuations when available. The disclosure of fair value estimates in the fair value accounting guidance hierarchy is based on whether the significant inputs into the valuation are observable. In determining the level of the hierarchy in which the estimate is disclosed, the highest priority is given to unadjusted quoted prices in active markets and the lowest priority to unobservable inputs that reflect the Company’s significant market assumptions.
	The three levels of the hierarchy are as follows:
	Level 1–Inputs to the valuation methodology are quoted prices for identical assets or liabilities traded in active markets.
	Level 2–Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market corroborated inputs.
	Level 3–Valuations based on models where significant inputs are not observable. The unobservable inputs reflect the Company’s own assumptions about the inputs that market participants would use.
	Fair values are based on quoted market prices when available (Level 1). The Company receives the quoted market prices from a third party, nationally recognized pricing service. When market prices are not available, the Company utilizes a pricing service to determine an estimate of fair value. The fair value is generally estimated using current market inputs for similar financial instruments with comparable terms and credit quality, commonly referred to as matrix pricing (Level 2). These valuation techniques involve some level of management estimation and judgment. The Company recognizes transfers between levels in the fair value hierarchy at the end of the reporting period.
	Fixed-Maturity Securities
	Fixed-maturity securities consist of U.S. Treasury securities, obligations of U.S. government agencies, commercial paper and domestic and foreign corporate debt securities. Fixed-maturity securities held in trust are for the benefit of the primary insurers as more fully described in Note 3: Insurance Activity. Investments in fixed-maturity securities are reported at their estimated fair values and are classified as trading securities in accordance with applicable accounting guidance. Realized gains and losses on the sale of fixed-maturity securities are determined using the specific identification method and are reported as a component of net investment income within the statement of operations.
	Cash Equivalents and Investments Held in Trust
	Cash equivalents, which include highly liquid overnight money market instruments, and fixed-maturity securities are held in trust for the benefit of the primary insurers, as more fully described in Note 3: Insurance Activity, are subject to the restrictions on distribution of net assets of subsidiaries as described below.
	Third Party Restrictions on Distribution of Net Assets of Wholly-Owned Subsidiaries
	The net assets of WMMRC are subject to restrictions from distribution from multiple sources including the primary insurers who have approval control of distribution from the trust, the Insurance Commissioner of the State of Hawaii who has approval control prior to distributions or intercompany advances, and additional restrictions as described in Note 7: Notes Payable.
	Premium Recognition
	Premiums assumed are earned on a daily pro-rata basis over the underlying policy terms. Premiums assumed relating to the unexpired portion of policies in force at the balance sheet date are recorded as unearned premiums. Unearned premiums also include a reserve for post default premium reserves. Post default premium reserves occur when a loan is in a default position and the servicer continues to advance the premiums. If the loan ultimately goes to claim, the premiums advanced during the period of default are subject to recapture. The Company records a default premium reserve based on information provided by the underlying mortgage insurers when they provide information on the default premium reserve separately from other reserves. The change in the default premium reserve is reflected as a reduction or increase, as the case may be, in premiums assumed. The Company has recorded unearned premiums totaling $0.9 million and $1.1 million as of March 31, 2015 and December 31, 2014, respectively.
	The Company recognizes premium deficiencies when there is a probable loss on an insurance contract. Premium deficiencies are recognized if the sum of the present value of expected losses and loss adjustment expenses, unamortized deferred acquisition costs, and maintenance costs exceed expected future unearned premiums and anticipated investment income. Premium deficiency reserves have been recorded totaling $2.3 million and $2.3 million as of March 31, 2015 and December 31, 2014, respectively.
	The Company’s premium deficiency analysis was performed on a single book basis and includes all book years and reinsurance treaties aggregated together using assumptions based on the actuarial best estimates at the balance sheet date. The calculation for premium deficiency requires significant judgment and includes estimates of future expected premiums, claims, loss adjustment expenses and investment income as of the balance sheet date. To the extent ultimate losses are higher or premiums are lower than estimated, additional premium deficiency reserves may be required in the future.
	Cash and Cash Equivalents
	Cash and cash equivalents include cash on hand, amounts due from banks, U.S. Treasury bills and overnight investments. Except as described above in Cash Equivalents and Investments Held in Trust, the Company considers all amounts that are invested in highly liquid overnight money market instruments to be cash equivalents. The FDIC insures amounts on deposit with each financial institution up to limits as prescribed by law. The Company may hold funds with financial institutions in excess of the FDIC insured amount, however, the Company has not experienced any losses in such accounts and management believes it is not exposed to any significant credit risk on cash and cash equivalents.
	Restricted Cash
	Restricted cash includes (i) amounts held for the express purposes of paying principal, interest, issuer secondary amounts and related fees on the Runoff Notes (as defined in Note 7: Notes Payable) pursuant to the terms of the Indentures (as defined in Note 7: Notes Payable) and (ii) proceeds of the Series B Preferred Stock offering held in escrow.
	Ceding Commission Expense
	The Company is required to pay a ceding commission to certain primary insurers pursuant to certain reinsurance agreements.
	Losses and Loss Adjustment Reserve
	The losses and loss adjustment reserve includes case basis estimates of reported losses and supplemental amounts for incurred but not reported losses (“IBNR”). A default is considered the incident (e.g., the failure to make timely payment of mortgage payments) that may give rise to a claim for mortgage insurance. In establishing the losses and loss adjustment reserve, the Company utilizes the findings of an independent consulting actuary. The consulting actuary estimates ultimate loss rates based upon industry data and claims and exposure data provided by the primary mortgage insurance carriers and assumptions of prepayment speed relative to loans reinsured by the Company. The fully developed ultimate loss rates are then applied to cumulative earned premium and reduced for cumulative losses and loss adjustment expenses paid to arrive at the liability for unpaid losses and loss adjustment expenses. Actuarial methods utilized by the consulting actuary to derive the ultimate loss rates include the loss development method, simulated loss development method, Bornhuetter-Ferguson method and simulated Bornhuetter-Ferguson method on a paid and incurred basis. Due to the current condition of the mortgage insurance market, WMMRC has recorded reserves at the higher of (x) reserves estimated by the consulting actuary for each primary mortgage guaranty carrier and (y) ceded case reserves and IBNR levels reported by the primary mortgage guaranty carriers as of March 31, 2015 and December 31, 2014, respectively. Management believes that the recorded aggregate liability for unpaid losses and loss adjustment expenses at period end represents the Company’s best estimate, based upon the available data, of the amount necessary to cover the current cost of losses. However, due to the inherent uncertainty arising from fluctuations in the persistency rate of mortgage insurance claims, the Company’s size and lack of prior operating history, external factors such as future changes in regional or national economic conditions, judicial decisions, federal and state legislation related to mortgage restructuring and foreclosure restrictions, claims denials and coverage rescissions by primary carriers and other factors beyond the Company’s control, it is not presently possible to determine whether actual loss experience will conform to the assumptions used in determining the estimated amounts for such liability at the balance sheet date. Accordingly, the ultimate liability could be significantly higher or lower, as the case may be, of the amount indicated in the financial statements and there can be no assurance that the reserve amounts recorded will be sufficient. As adjustments to these estimates become necessary, such adjustments are reflected in current operations.
	Loss Contract Fair Market Value Reserve
	A loss contract fair market value reserve relating to contractual obligations of WMMRC was established at March 19, 2012 as a result of applying fresh start accounting and in compliance with ASC 805-10-55-21(b)(1) which defines a loss contract as a “contract in which the unavoidable costs of meeting the obligations under the contract exceed the economic benefits expected to be received under it.” The fair market value of this reserve is analyzed quarterly and is adjusted accordingly. This adjustment to the reserve produces an expense or contra-expense in the statement of operations.
	Fresh Start Accounting
	The Company adopted fresh start accounting in accordance with ASC 852 (Reorganizations) (“ASC 852”) upon emergence from bankruptcy on March 19, 2012. Under ASC 852, the application of fresh start accounting results in the allocation of reorganization value to the fair value of assets, and is required when (a) the reorganization value of assets immediately prior to confirmation of a plan of reorganization is less than the total of all post-petition liabilities and allowed claims and (b) the holders of voting shares immediately prior to the confirmation of the plan of reorganization receive less than 50 percent of the voting shares of the emerging entity. The Company adopted fresh start accounting as of the Effective Date, which represents the date on which all material conditions precedent to the effectiveness of the Plan were satisfied or waived. As of the Effective Date, the Company believes that it satisfied both of the aforementioned conditions.
	The Company’s reorganization value (“Equity Value”), upon emergence from bankruptcy, was determined to be $76.6 million, which represented management’s best estimate of fair value based on a calculation of the present value of the Company’s consolidated assets and liabilities as at March 19, 2012. As part of our fresh start reporting, we applied various valuation methodologies to calculate the reorganization value of the Company. These methods included (a) the comparable company analysis, (b) the precedent transactions analysis and (c) the discounted cash flow analysis. The application of these methodologies requires certain key estimates, judgments and assumptions, including financial projections, the amount of cash available to fund operations and current market conditions. Such projections, judgments and assumptions are inherently subject to significant uncertainties and there can be no assurance that such estimates, assumptions and projections reflected in the valuation will be realized and actual results may vary materially. The Company filed a Form 8-K pertaining to emergence from bankruptcy and subsequently filed a Form 8-K/A, which included WMIHC’s audited balance sheet as of the Effective Date.
	Comprehensive Income (Loss)
	The Company has no comprehensive income (loss) other than the net income (loss) disclosed in the condensed consolidated statement of operations.
	Net Income (Loss) Per Common Share
	Basic income (loss) per common share is computed by dividing net income (loss) applicable to the Company’s common shareholders by the weighted average number of common shares outstanding for the period after subtracting the weighted average of any unvested restricted shares outstanding, as these are subject to repurchase. Diluted net income (loss) per common share is computed by dividing net income (loss) applicable to the Company’s common shareholders by the weighted average number of common shares outstanding during the period after subtracting the weighted average of any unvested restricted shares outstanding, as these are subject to repurchase and the effect of all dilutive common stock equivalents. If common share equivalents exist, in periods where there is a net loss, diluted loss per common share would be equal to or less than basic loss per common share, since the effect of including any common share equivalents would be antidilutive.
	Equity-Based Compensation
	On May 22, 2012, WMIHC’s Board of Directors (the “Board”) approved the Company’s 2012 Long-Term Incentive Plan (the “2012 Plan”) to award restricted stock to its non-employee directors and to have a plan in place for awards to executives and others in connection with the Company’s operations and future strategic plans. A total of 2 million shares of common stock were initially reserved for future issuance under the 2012 Plan, which became effective upon the Board approval on May 22, 2012. On February 10, 2014, the Board approved and adopted a First Amendment to the 2012 Plan, pursuant to which the number of shares of WMIHC’s common stock reserved and available for grants under the 2012 Plan was increased from 2.0 million shares to 3.0 million shares, and that modified the terms under which the 2012 Plan may be amended to permit such an increase through action of the Board except when shareholder approval is necessary to comply with any applicable law, regulation or rule of any stock exchange on which WMIHC’s shares are listed, quoted or traded. On February 25, 2015, the number of shares authorized and available for awards under the 2012 Plan was increased from 3.0 million to 12.0 million shares of WMIHC’s common stock, subject to approval of shareholders of WMIHC.  This approval was received at the Company’s Annual Meeting of Shareholders on April 28, 2015.  The 2012 Plan provides for the granting of restricted shares, stock options and other cash and share based awards. The value of restricted stock is determined using the fair market value determined to be the trading price at the close of business on the respective date the awards were granted.
	Income Taxes
	The Company follows the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future income tax consequences attributable to differences between the carrying amounts and tax bases of assets and liabilities and losses carried forward and tax credits. Deferred tax assets and liabilities are measured using enacted tax rates and laws applicable to the years in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is provided to the extent that it is more likely than not that deferred tax assets will not be realized.
	The Company recognizes the financial statement effects of a tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. Penalties and interest, of which there are none, would be reflected in income tax expense. Tax years are open to the extent the Company has net operating loss carry-forwards available to be utilized currently.
	Reclassification
	Certain prior period balances have been reclassified to conform with the basis of presentation used as of March 31, 2015.
	Dividend Policy
	WMIHC has paid no dividends on its common stock on or after the Effective Date and currently has no plans to pay a dividend on its common stock. The Note Purchase Agreement (as such is defined in Note 8: Financing Arrangements) includes restrictions related to the payment of dividends.
	WMIHC has declared and paid $3.5 million of dividends on its Series B Preferred Stock and has accreted an additional $0.7 million of dividends based on the 3% interest rate during the three months ended March 31, 2015.   The Series B Preferred Stock was issued on January 5, 2015, therefore no dividends were due or paid for any prior period.
	New Accounting Pronouncements
	In April 2015 the FASB issued Accounting Standards Update 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.  This update, requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company has reviewed this standard and determined it has no material impact on the Company’s consolidated financial position, results of operations or disclosure requirements.

Insurance_Activity

Insurance Activity	3 Months Ended
	Mar. 31, 2015
Insurance [Abstract]
Insurance Activity	Note 3: Insurance Activity
	The Company, through WMMRC, reinsures mortgage guaranty risks of mortgage loans originated by affiliates of the Company during the period from 1997 through 2008. WMMRC is (or was) a party to reinsurance agreements with UGRIC, GMIC, MGIC, PMI, Radian, RMIC and Triad. The agreements with UGRIC and Triad were placed into runoff effective May 31, 2008. The agreements with all other primary mortgage insurers were placed into runoff effective September 26, 2008. The reinsurance agreements with Triad, PMI and UGRIC were commuted on August 31, 2009, October 2, 2012 and April 3, 2014, respectively.
	All agreements between WMMRC and the primary mortgage insurers are on an excess of loss basis, except for certain reinsurance treaties with GMIC and Radian during 2007 and 2008, which are reinsured on a 50 percent quota share basis. Pursuant to the excess of loss reinsurance treaties, WMMRC reinsures a second loss layer which ranges from 5 percent to 10 percent of the risk in force in excess of the primary mortgage insurer’s first loss percentage which range from 4 percent to 5 percent. Each calendar year, or book year, is treated separately from other years when calculating losses. In return for accepting a portion of the risk, WMMRC receives, net of ceding commission, a percentage of the premium that ranges from 25 to 40 percent.
	As security for the ceding insurers, WMMRC has entered into separate trust agreements with each of the primary mortgage insurance companies whereby a portion of the funds from premiums assumed are held in trust accounts for the benefit of each separate insurer. Pursuant to the terms of the reinsurance agreements, WMMRC is required to keep such assets in trust for a minimum of five (5) years and are subject to claims for up to ten (10) years from termination of obligations arising from the last year in which insurance business was written prior to runoff. Release of funds from the trust by WMMRC requires approval from the primary mortgage guaranty companies.
	Premiums assumed and earned are as follows for the periods ended March 31, 2015 and 2014, respectively:
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Premiums assumed	$	1,189		$	2,039
	Change in unearned premiums		160			127
	Premiums earned	$	1,349		$	2,166
	The components of the liability for losses and loss adjustment reserves are as follows as of March 31, 2015 and December 31, 2014, respectively:
		March 31, 2015			December 31, 2014
	Case-basis reserves	$	5,888		$	16,538
	IBNR reserves		100			110
	Premium deficiency reserves		2,299			2,299
	Total losses and loss adjustment reserves	$	8,287		$	18,947
	Losses and loss adjustment reserve activity are as follows for the three months ended March 31, 2015 and the year ended December 31, 2014, respectively:
		March 31, 2015			December 31, 2014
	Balance at beginning of period	$	18,947		$	44,314
	Incurred (released) - prior periods		(541	)		3,281
	Paid - prior periods		(10,119	)		(28,648	)
	Total losses and loss adjustment reserves	$	8,287		$	18,947
	The loss contract fair market reserve balance is analyzed and adjusted quarterly. The balance in the reserve was $12.5 million at March 31, 2015 and $12.5 million at December 31, 2014. The fair market value of this reserve remained unchanged during the three months ended March 31, 2015 and March 31, 2014, respectively. As a result, no corresponding increase or decrease in expense resulted.

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investments Debt And Equity Securities [Abstract]
Investment Securities
	Note 4: Investment Securities
	The amortized cost, gross unrealized gains, gross unrealized losses and estimated fair values of total fixed-maturity securities and total fixed-maturity securities held in trust at March 31, 2015, are as follows:
		March 31, 2015
		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses				Estimated Fair Value
	Obligations of U.S. government sponsored enterprises	$	75,474		$	6		$	(16	)		$	75,464
	Corporate debt securities		28,264			331			(8	)			28,587
	Commercial paper		4,998			1			—				4,999
	Foreign corporate debt securities		10,899			57			(7	)			10,949
	Total fixed-maturity securities		119,635			395			(31	)			119,999
	Less total unrestricted fixed-maturity securities		74,041			147			(5	)			74,183
	Total fixed-maturity securities held in trust	$	45,594		$	248		$	(26	)		$	45,816
	The amortized cost, gross unrealized gains, gross unrealized losses and estimated fair values of total fixed-maturity securities and total fixed-maturity securities held in trust at December 31, 2014, are as follows:
		December 31, 2014
		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses				Estimated Fair Value
	Obligations of U.S. government sponsored enterprises	$	6,491		$	12		$	(28	)		$	6,475
	Corporate debt securities		41,018			531			(65	)			41,484
	Commercial paper		—			—			—				—
	Foreign corporate debt securities		12,693			47			(58	)			12,682
	Total fixed-maturity securities		60,202			590			(151	)			60,641
	Less total unrestricted fixed-maturity securities		7,895			179			(11	)			8,063
	Total fixed-maturity securities held in trust	$	52,307		$	411		$	(140	)		$	52,578
	Amortized cost and estimated fair value of fixed-maturity securities at March 31, 2015 by contractual maturity are as follows:
		Amortized			Estimated
		Cost			Fair Value
	Maturity in:
	2015	$	85,087		$	85,122
	2016-2019		34,548			34,877
	Total fixed-maturity securities	$	119,635		$	119,999
	Actual maturities may differ from contractual maturities because certain borrowers have the right to call or prepay obligations with or without call or prepayment penalties.
	Net investment income (loss) for the periods ended March 31, 2015 and 2014, respectively, is summarized as follows:
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Investment income (loss):
	Amortization of premium or discount on fixed-maturity securities	$	(179	)	$	(529	)
	Investment income on fixed-maturity securities		413			1,102
	Interest income on cash and equivalents		57			2
	Realized net gain (loss) from sale of investments		186			27
	Unrealized (losses) gains on trading securities held at period end		(76	)		66
	Net investment income (loss)	$	401		$	668
	The following table shows how the Company’s investments are categorized in accordance with fair value measurement, as of March 31, 2015:
		March 31, 2015
		Level 1			Level 2			Level 3				Total
	Class of Securities:
	Obligations of U.S. government sponsored enterprises	$	71,979		$	3,485		$	—			$	75,464
	Corporate debt securities		9,071			19,516			—				28,587
	Commercial paper		4,999			—			—				4,999
	Foreign corporate debt securities		1,072			9,877			—				10,949
	Total fixed-maturity securities		87,121			32,878			—				119,999
	Money market funds		11,292			—			—				11,292
	Total	$	98,413		$	32,878		$	—			$	131,291
	The following table shows how the Company’s investments are categorized in accordance with fair value measurement, as of December 31, 2014:
		December 31, 2014
		Level 1			Level 2			Level 3				Total
	Class of Securities:
	Obligations of U.S. government sponsored enterprises	$	3,009		$	3,466		$	—			$	6,475
	Corporate debt securities		14,939			26,545							41,484
	Commercial paper		—			—			—				—
	Foreign corporate debt securities		2,822			9,860			—				12,682
	Total fixed-maturity securities		20,770			39,871			—				60,641
	Money market funds		88,851			—			—				88,851
	Total	$	109,621		$	39,871		$	—			$	149,492
	A review of the fair value hierarchy classifications of the Company’s investments is conducted quarterly. Changes in the observability of valuation inputs may result in a reclassification for certain financial assets or liabilities. Reclassifications are reported as transfers in or transfers out of the applicable Level at the end of the calendar quarter in which the reclassifications occur. During the three months ended March 31, 2015 and the year ended December 31, 2014, $0.0 million and $15.8 million, respectively, of investments were transferred from Level 2 to Level 1 as a result of improving market conditions for short-term and investment grade corporate securities.
		January 1, 2015 to March 31, 2015							January 1, 2014 to December 31, 2014
		Transfers			Transfers					Transfers				Transfers
from Level 1 to		from Level 2			from Level 1 to					from Level 2
Level 2		to Level 1			Level 2					to Level 1
Class of Securities:
Corporate securities	$	—		$	—				$	—			$	13,941
Foreign corporate debt securities		—			—					—				1,810
Total transfers	$	—		$	—				$	—			$	15,751

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 5: Income Taxes
	For the three months ended March 31, 2015, the Company recorded net income of approximately $5.5 million. Due to projected tax losses for the year ended December 31, 2015 and the existence of net operating loss carry forwards which have a 100% valuation allowance recorded to reduce them to zero, the Company has not recorded an income tax expense or benefit for the three months ended March 31, 2015. The Company recorded no income tax expense or benefit for the year ended December 31, 2014 due to tax losses in that period.
	The Company files a consolidated federal income tax return. Pursuant to a tax sharing agreement, WMMRC’s federal income tax liability is calculated on a separate return basis determined by applying 35 percent to taxable income, in accordance with the provisions of the Internal Revenue Code (the “Code”) that apply to property and casualty insurance companies. WMIHC, as WMMRC’s parent, pays federal income taxes on behalf of WMMRC and settles the federal income tax obligation on a current basis in accordance with the tax sharing agreement. WMMRC made no tax payments to WMIHC during the three months ended March 31, 2015 or the year ended December 31, 2014 associated with the Company’s tax liability from the preceding year.
	Deferred federal income taxes arise from temporary differences between the valuation of assets and liabilities as determined for financial reporting purposes and income tax purposes. Temporary differences principally relate to discounting of loss reserves, accruals, net operating losses and unrealized gains and losses on investments. As of March 31, 2015 and December 31, 2014, the Company recorded a valuation allowance equal to 100 percent of the net deferred federal income tax asset due to uncertainty regarding the Company’s ability to realize these benefits in the future.
	On March 19, 2012, WMIHC emerged from bankruptcy. Prior to emergence, WMI abandoned the stock of WMB, thereby generating a worthless stock deduction of approximately $8.37 billion which gave rise to a NOL for the year ended December 31, 2012. Under Section 382 of the Code, and based on the Company’s analysis, we believe that the Company experienced an “ownership change” (generally defined as a greater than 50 percent change (by value) in our equity ownership over a three-year period) on March 19, 2012, and our ability to use our pre-change of control NOLs and other pre-change tax attributes against our post-change income was limited. The Section 382 limitation is applied annually so as to limit the use of our pre-change NOLs to an amount that generally equals the value of our stock immediately before the ownership change multiplied by a designated federal long-term tax-exempt rate. Due to applicable limitations under Section 382 and a reduction of tax attributes due to cancellation of indebtedness, a portion of these NOLs were limited and will expire unused. We believe that the total available and utilizable NOL carry forward at December 31, 2014 is approximately $6.00 billion. At March 31, 2015 there was no limitation on the use of these NOLs. These NOLs will begin to expire in 2031. The Company’s ability to utilize the NOLs or realize any benefits related to the NOLs is subject to a number of risks.
	The Company accounts for uncertain tax positions in accordance with the income taxes accounting guidance. The Company has analyzed filing positions in the federal and state jurisdictions where it is required to file tax returns, as well as the open tax years in these jurisdictions. Tax years 2011 to present are subject to examination by the Internal Revenue Service. The Company believes that its federal income tax filing positions and deductions will be sustained on audit and does not anticipate any adjustments that will result in a material change to its financial position. Therefore, no reserves for uncertain federal income tax positions have been recorded. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of the provision for federal income taxes. The Company did not incur any federal income tax related interest income, interest expense or penalties for the periods ended March 31, 2015 and December 31, 2014.

Service_Agreements_and_Related

Service Agreements and Related Party Transactions	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Service Agreements and Related Party Transactions	Note 6: Service Agreements and Related Party Transactions
	WMMRC has engaged a Hawaiian-based service provider, Marsh Management Services, Inc., to provide accounting and related management services for its operations. In exchange for performing these services, WMMRC pays such service provider a management fee.
	WMIHC entered into an Investment Management Agreement and an Administrative Services Agreement with WMMRC on March 19, 2012. Each of these agreements was approved by WMMRC’s primary regulator. Total amounts incurred under these agreements totaled $0.4 million and $0.4 million for the three months ended March 31, 2015 and 2014, respectively. The expense and related income eliminate on consolidation. These agreements are described below.
	Under the terms of such Investment Management Agreement, WMIHC receives from WMMRC a fee equal to the product of (x) the ending dollar amount of assets under management during the calendar month in question and (y) .002 divided by 12. WMIHC is responsible for investing the funds of WMMRC based on applicable investment criteria and subject to rules and regulations to which WMMRC is subject.
	Under the terms of such Administrative Services Agreement, WMIHC receives from WMMRC a fee of $110 thousand per month. WMIHC is responsible for providing administrative services to support, among other things, supervision, governance, financial administration and reporting, risk management and claims management as may be necessary, together with such other general or specific administrative services that may be reasonably required or requested by WMMRC in the ordinary course of its business.
	On March 22, 2012, WMIHC and the WMI Liquidating Trust (the “Trust”) entered into a Transition Services Agreement (the “TSA”). Pursuant to the TSA, the Trust makes available certain services and employees. The TSA provides the Company with office space for its current employees and basic infrastructure and support services to allow the Company to operate. The TSA, as amended, extends the term of the agreement through July 31, 2015, with automatic renewals thereafter for successive additional three-month terms, subject to non-renewal at the end of any additional term upon written notice by either party at least 30 days prior to the expiration of the additional term.
	In connection with implementing the Plan, certain holders of specified “Allowed Claims” had the right to elect to receive such holder’s “Pro Rata Share of the Common Stock Allotment.” Essentially, the Plan defines the “Pro Rata Share of the Common Stock Allotment” as a pro rata share of ten million (10,000,000) shares of WMIHC’s common stock (i.e. five percent (5%)) issued and outstanding on the Effective Date. Holders exercising the foregoing election did so in lieu of receiving (i) 50% of such holder’s interest in and to certain litigation proceeds that could be realized by the Trust on account of certain claims and causes of action asserted by the Trust as contemplated by the Plan (“Litigation Proceeds”), and (ii) some or all of the Runoff Notes to which such holder may be entitled (if such holder elected to receive Runoff Notes in accordance with the terms of the Plan).
	If a holder exercised the election described above and, as a result of such election, received shares of WMIHC’s common stock, then such holder’s share of Runoff Notes to which the election was effective (i.e., One Dollar ($1.00) of original principal amount of Runoff Notes for each share of WMIHC’s common stock) were not issued. In addition, as a result of making the aforementioned election, such holders conveyed to WMIHC, and WMIHC retains an economic interest in, the Litigation Proceeds equal to fifty percent (50%) of the Litigation Proceeds to which the electing holder otherwise would have been entitled and such holder’s rights in respect of distributions from the Trust will be adjusted to the extent Litigation Proceeds are received by WMIHC. Distributions, if any, to WMIHC on account of the foregoing will be effected in accordance with the Plan and the court order confirming the Plan.
	WMIHC is aware that on or about October 14, 2014, the Trust filed a lawsuit in King County Superior Court in the State of Washington against 16 former directors and officers of WMI (the “D&O Litigation”). The Trust’s complaint alleges, among other things, that the defendants named therein breached their fiduciary duties to WMI and committed corporate waste and fraud by squandering WMI’s financial resources.
	In connection with the D&O Litigation, on December 1, 2014, the Trust filed its Motion for an Order, Pursuant to Sections 105(a) and 362 of the Bankruptcy Code and Rule 9019 of the Federal Rules of Bankruptcy Procedure, (A) Approving Settlement Agreement Between WMI Liquidating Trust, Certain Directors and Officer and Insurers and (B) Authorizing and Directing the Consummation Thereof (as amended, modified or supplemented prior to the date hereof, the (“D&O Settlement Motion”).  Among other things, the D&O Settlement Motion sought approval of a settlement among the Trust, certain former directors and officers of WMI and certain insurance carriers that underwrote director and officer liability insurance policies for the benefit of WMI and its affiliates (including such former directors and officers).  At a hearing held on December 23, 2014, the United States Bankruptcy Court for the District of Delaware (the “Bankruptcy Court”) granted the Trust’s D&O Settlement Motion.  On January 5, 2015, certain non-settling officers appealed the Bankruptcy Court’s order granting the D&O Settlement Motion and, as a result, such settlement has not yet been consummated.  If the Bankruptcy Court’s order is affirmed on appeal, then such settlement will, among other things, result in a payment by such insurance carriers to the Trust of $37.0 million.  It is expected that such payment will constitute Litigation Proceeds (as described above).  In its Quarterly Summary Report for the period ended December 31, 2014, a copy of which was filed by the Trust under Form 8-K on or about January 30, 2015, the Trust estimated that WMIHC would be entitled to receive approximately $9.0 million out of the $37.0 million.  The foregoing notwithstanding, this litigation is managed and controlled by the Trust and WMIHC is not involved in the D&O Litigation.  Unless and until the Bankruptcy Court’s order approving the D&O Settlement Order is affirmed and such settlement is consummated, there can be no assurance that WMIHC will recover any amounts on account of the D&O Litigation.
	The Trust’s Litigation Subcommittee disclosed in its Form 10-K for the period ended December 31, 2013 that it investigated potential claims against various third parties, including breach of contract claims, breach of fiduciary duty claims, professional malpractice claims, and business tort and antitrust claims. Based on such investigation, the Litigation Subcommittee determined not to assert claims against such third parties, other than those which are currently pending and being litigated.  As a result of the Trust’s public disclosures on these matters, at this time WMIHC believes it is unlikely that it will realize any value on account of recovery claims, other than as described above.  Indeed, as of March 31, 2015, WMIHC had not received any Litigation Proceeds in connection with the foregoing and, there can be no assurance that WMIHC will receive any value or distributions on account of Litigation Proceeds.

Notes_Payable

Notes Payable	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Notes Payable	Note 7: Notes Payable
	On the Effective Date, WMIHC issued $110.0 million aggregate principal amount of its 13% Senior First Lien Notes due 2030 (the “First Lien Notes”) under an indenture, dated as of March 19, 2012 (the “First Lien Indenture”), between WMIHC and Wilmington Trust, National Association, as Trustee. Additionally, WMIHC issued $20.0 million aggregate principal amount of its 13% Senior Second Lien Notes due 2030 (the “Second Lien Notes” and, together with the First Lien Notes, the “Runoff Notes”) under an indenture, dated as of March 19, 2012 (the “Second Lien Indenture” and, together with the First Lien Indenture, the “Indentures”), between WMIHC and Law Debenture Trust Company of New York, as Trustee. The Runoff Notes are scheduled to mature on March 19, 2030 and pay interest quarterly.
	The Runoff Notes are secured by, and have a specified priority in right of payment in, a securities or deposit account into which WMIHC is required to deposit distributions it receives of Runoff Proceeds (as defined in the Indentures) (the “Collateral Account”).
	WMIHC will, and has agreed to cause WMMRC to, deposit all distributions, dividends or other receipts in respect of Runoff Proceeds Distributions (as defined in the Indentures) on the date paid to WMIHC in the Collateral Account established in accordance with the terms of the Indentures. On any interest payment date, payments are made from the Collateral Account and from any other Runoff Proceeds Distributions in the priority set forth in the Indentures. The obligations created by the Runoff Notes are nonrecourse to WMIHC (except for certain actions for specific performance) and, except in certain limited circumstances as more fully described in Section 7.16 of the Indentures with respect to Runoff Proceeds Distributions in the Collateral Account or for failure to comply with certain specified covenants relating to (i) the deposit of Runoff Proceeds in the Collateral Account, (ii) payment of Runoff Proceeds in the Collateral Account in accordance with the order of priority established in the Indentures, (iii) failure to seek to obtain the appropriate regulatory approval to permit the dividend of Runoff Proceeds to WMIHC and (iv) the failure to cause WMMRC to deposit Runoff Proceeds into a segregated account.
	In connection with certain interest payments due and payable in respect of the First Lien Notes, WMIHC elected, consistent with the terms of the Indentures, to issue PIK Notes (as defined in the Indentures) in lieu of making such interest payments in cash when no cash was available. In connection with interest payments due and payable in respect of the Second Lien Notes since inception, WMIHC elected, consistent with the terms of the Indentures, to issue PIK Notes (as defined in the Indentures) in lieu of making such interest payments in cash. The aggregate face amount of PIK Notes issued as of March 31, 2015 and December 31, 2014 totals approximately $19.4 million and $18.5 million, respectively. Outstanding amounts under these notes totaled approximately $29.8 million and $31.2 million as of March 31, 2015 and December 31, 2014, respectively. Approximately $2.3 million and $78.9 million of First Lien Notes principal was paid during the three months ended March 31, 2015, and the year ended December 31, 2014, respectively. Interest on First Lien Notes paid in cash totaled approximately $0.1 million and $1.5 million during the three months ended March 31, 2015 and 2014, respectively.
	As of March 31, 2015 and December 31, 2014, the Collateral Account contained $3.1 million and $2.4 million, respectively, of cash received from WMMRC which were or will be ultimately used for future administrative expenses, reductions of issuer secondary amounts, interest and principal payments.

Financing_Arrangements

Financing Arrangements	3 Months Ended
	Mar. 31, 2015
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Financing Arrangements	Note 8: Financing Arrangements
	As of March 19, 2012, a Financing Agreement (the “Financing Agreement”) was entered into by and among WMIHC, WMIIC, the lenders, severally and not jointly, party thereto (each a “Lender” and collectively, the “Lenders”) and U.S. Bank National Association, a national banking association, as administrative agent for the Lenders.
	Pursuant to the terms and conditions of the Financing Agreement, the commitment of the Lenders to extend credit under the Financing Agreement would have terminated no later than March 19, 2015.  However, on January 5, 2015, the Company entered into an agreement for termination of the Financing Agreement, (the “Financing Agreement Termination”).  Pursuant to the Financing Agreement Termination, the Financing Agreement automatically terminated on January 5, 2015 and the Company no longer has or will have access to the funds thereunder. As of January 5, 2015, there were no loans outstanding under the Financing Agreement.
	On January 30, 2014, WMIHC entered into (i) a note purchase agreement, dated as of January 30, 2014 (the “Note Purchase Agreement”), with the guarantors party thereto and KKR Management Holdings L.P. (“KKR Management”), (ii) an investment agreement, dated as of January 30, 2014 (the “Investment Agreement”), with KKR Fund Holdings L.P. (“KKR Fund” and, together with KKR Management, “KKR”) and, for limited purposes, KKR Management and (iii) an investor rights agreement, dated as of January 30, 2014 (the “Investor Rights Agreement”), with KKR Fund (together, the “KKR Transaction”).
	Pursuant to the terms and conditions of the Note Purchase Agreement, KKR Management committed to purchase up to $150.0 million aggregate principal amount (at issuance) of subordinated 7.50% PIK notes from the Company. On January 5, 2015, the Company, as a result of affiliates of KKR purchasing 200,000 shares of Series B Preferred Stock, and other parties to the Note Purchase Agreement executed an amendment to the Note Purchase Agreement that will have the effect of terminating the Note Purchase Agreement as of the planned reincorporation of WMIHC from Washington to Delaware as more fully described in Note 14: Subsequent Events. The amendment to the Note Purchase Agreement also waives any and all defaults, events of default and rights to terminate the Note Purchase Agreement arising as a result of the offering of Series B Preferred Stock and permits the performance of, and compliance with, all of the terms of the Series B Preferred Stock. Until the reincorporation is finalized, the Note Purchase Agreement remains in effect, subject to its terms as amended.  For further information on the reincorporation, see Note 14: Subsequent Events.

Capital_Stock

Capital Stock	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Capital Stock	Note 9: Capital Stock
	On the Effective Date, all shares of common and preferred equity securities previously issued by WMI were cancelled and extinguished. As of the Effective Date, and pursuant to WMIHC’s Amended and Restated Articles of Incorporation (the “Articles”), WMIHC is authorized to issue up to 500,000,000 shares of common stock and up to 5,000,000 shares of blank check preferred stock, each with a par value of $0.00001 per share. 200,000,000 shares of common stock were issued by WMIHC pursuant to the Plan and in reliance on Section 1145 of the Bankruptcy Code on the Effective Date.
	As described in Note 8: Financing Arrangements, WMIHC entered into (i) the Note Purchase Agreement, (ii) the Investment Agreement and (iii) the Investor Rights Agreement on January 30, 2014. On January 30, 2014, pursuant to an investment agreement, WMIHC issued 1,000,000 shares of its Series A Convertible Preferred Stock (the “Series A Preferred Stock”) having the terms, rights, obligations and preferences contained in the Articles of Amendment of WMIHC dated January 30, 2014 for a purchase price equal to $11.1 million and issued to KKR Fund warrants to purchase, in the aggregate, 61.4 million shares of WMIHC’s common stock, 30.7 million of which have an exercise price of $1.32 per share and 30.7 million of which have an exercise price of $1.43 per share (together, the “Warrants”).
	The Series A Preferred Stock has rights substantially similar to those associated with WMIHC’s common stock, with the exception of a liquidation preference, conversion rights and customary anti-dilution protections. The Series A Preferred Stock has a liquidation preference equal to the greater of (i) $10.00 per one million shares of Series A Preferred Stock plus declared but unpaid dividends on such shares and (ii) the amount that the holder would be entitled to in a relevant transaction had the Series A Preferred Stock been converted to common stock of WMIHC. The Series A Preferred Stock is convertible at a conversion price of $1.10 per share into shares of common stock of WMIHC either at the option of the holder or automatically upon transfer by KKR Fund to a non-affiliated party. As a result of the calculation of a beneficial conversion feature as required by ASC 470 a preferred deemed dividend of $9.5 million was recorded in conjunction with the issuance of the preferred stock. This preferred deemed dividend resulted in an increase to our accumulated deficit, and as an increase in additional paid in capital. Further, KKR Fund, as the holder of the Series A Preferred Stock and the Warrants, has received other rights pursuant to the Investor Rights Agreement as described below.
	The Warrants have a five-year term from the date of issuance and are subject to customary structural adjustment provisions for stock splits, combinations, recapitalizations and other similar transactions. KKR Fund’s rights as a holder of the Series A Preferred Stock and the Warrants, and the rights of any subsequent holder that is an affiliate of KKR Fund (together with KKR Fund, the “Series A Holders”) are governed by the Investor Rights Agreement. Pursuant to the Investor Rights Agreement, for so long as the Series A Holders own 50% of the Series A Preferred Stock issued as of January 30, 2014 (or the underlying common stock of WMIHC), the Series A Holders will have the right to appoint one of seven directors to the Board.
	Additionally, until January 30, 2017, the Series A Holders will have the right to purchase up to 50% of any future equity rights offerings or other equity issuance by WMIHC on the same terms as the equity issued to other investors in such transactions, in an aggregate amount of such offerings and issuances by WMIHC of up to $1.0 billion (the “Participation Rights”). The foregoing Participation Rights do not include any issuances of securities by WMIHC constituting any part of the consideration payable by it in connection with any acquisitions or investments (including any rollover equity) or in respect of any employee options or other income compensation. The aggregate beneficial ownership by Series A Holders of equity securities of WMIHC after giving effect to any equity issuances (and on a pro forma basis after taking into account any acquisitions) shall at no time exceed 42.5% of the equity securities of WMIHC without the prior written consent of WMIHC. Any such rights to acquire equity securities are subject to limitation to the extent they would cause a loss of all or substantially all of the benefit of the Company’s tax benefits (as such term is defined in the Articles). Except for the foregoing Participation Rights and the issuance of common stock in respect of the Warrants and the Series A Preferred Stock, KKR Fund and its affiliates shall not purchase or acquire any equity securities of WMIHC or its subsidiaries without WMIHC’s prior written consent, subject to certain exceptions.
	In connection with the issuance of the Series A Preferred Stock and the Warrants, KKR Fund and its affiliates agreed that, until December 31, 2016, they will not:
	—	request the call of a special meeting of the shareholders of WMIHC; seek to make, or make, a shareholder proposal at any meeting of the shareholders of WMIHC; seek the removal of any director from the Board; or make any “solicitation” of “proxies” (as such terms are used in the proxy rules of the SEC) or solicit any written consents of shareholders with respect to any matter;
	—	form or join or participate in a “partnership, limited partnership, syndicate or other group” within the meaning of Section 13(d)(3) of the Exchange Act, with respect to any voting securities of WMIHC;
	—	make or issue, or cause to be made or issued, any public disclosure, statement or announcement (including filing reports with the SEC) (x) in support of any solicitation described above, or (y) negatively commenting upon WMIHC;
	—	except pursuant to any exercise of any Warrant, the conversion of the Series A Preferred Stock, or the exercise of the Participation Rights, acquire, agree or seek to acquire, beneficially or otherwise, any voting securities of the Company (other than securities issued pursuant to a plan established by the Board for members of the Board, a stock split, stock dividend distribution, spin-off, combination, reclassification or recapitalization of WMIHC and its common stock or other similar corporate action initiated by WMIHC);
	—	enter into any discussions, negotiations, agreements or undertakings with any person with respect to the foregoing or advise, assist, encourage or seek to persuade others to take any action with respect to the foregoing, except pursuant to mandates granted by WMIHC to raise capital by WMIHC to KKR Capital Markets LLC and its affiliates; or
	—	short any of WMIHC’s common stock or acquire any derivative or hedging instrument or contract relating to WMIHC’s common stock.
	In the event that any shareholder or group of shareholders other than KKR Fund calls a shareholder meeting or seeks to nominate nominees to the Board, then KKR Fund shall not be restricted from calling a shareholder meeting in order to nominate directors as an alternative to the nominees nominated by such shareholder or group, provided that KKR Fund shall not nominate or propose a number of directors to the Board that is greater than the number of directors nominated or proposed by such shareholder or group.
	The Investor Rights Agreement also provides the Series A Holders with registration rights, including three long form demand registration rights, unlimited short form demand registration rights and customary piggyback registration rights with respect to common stock (and common stock underlying the Series A Preferred Stock and the Warrants), subject to certain minimum thresholds, customary blackout periods and lockups of 180 days.
	For as long as the Series A Holders beneficially own any shares of common stock of WMIHC or Convertible Preferred Stock or any of the Warrants, WMIHC has agreed to provide customary Rule 144A information rights, to provide the Series A Holders with regular audited and unaudited financial statements and to allow the Series A Holders or their representatives to inspect WMIHC’s books and records.
	The foregoing description of (i) the Investor Rights Agreement is qualified in its entirety by reference to the Investor Rights Agreement, which was filed with the SEC as Exhibit 4.2 on Form 8-K on January 31, 2014, and incorporated by reference, (ii) the Warrants are qualified in their entirety by reference to the Form of Tranche A Warrant and Form of Tranche B Warrant, which were filed with the SEC as Exhibits 4.3 and 4.4, respectively, on Form 8-K on January 31, 2014, and incorporated by reference, (iii) the Series A Preferred Stock is qualified in its entirety by reference to the Articles of Amendment of Articles of Incorporation Containing the Designation of Rights and Preferences of the Series A Convertible Preferred Stock, which were filed with the SEC as Exhibit 4.5 on Form 8-K on January 31, 2014, and incorporated by reference, the Form of Series A Convertible Preferred Stock Certificate, which was filed with the SEC as Exhibit 4.6 on Form 8-K on January 31, 2014, and incorporated by reference, and (iv) the Investment Agreement is qualified in its entirety by reference to the Investment Agreement, which was filed with the SEC as Exhibit 10.1 on Form 8-K on January 31, 2014, and incorporated by reference.
	On January 5, 2015, WMIHC in connection with an offering of 600,000 shares of its 3.00% Series B Preferred Stock, par value $0.00001, liquidation preference $1,000 per share (the “Series B Preferred Stock”) filed with the Secretary of State of Washington Articles of Amendment of Articles of Incorporation (the “Articles of Amendment”) containing the Designation of Rights and Preferences of the 3.00% Series B Preferred Stock (the “Certificate of Designation”) creating the Series B Preferred Stock and designating the rights and preferences of the Series B Preferred Stock.
	The foregoing descriptions of the Articles of Amendment and the Certificate of Designation are qualified in their entirety by the provisions of the Articles of Amendment and the Certificate of Designation, filed as Exhibits 3.1 and 4.1 of a Form 8-K on January 5, 2015, respectively, and incorporated by reference herein.
	On January 5, 2015, in connection with the offering and pursuant to that certain Purchase Agreement, dated December 19, 2014 (the “Purchase Agreement”), by and among WMIHC, Citigroup Global Markets Inc. (“Citi”) and KKR Capital Markets LLC (“KCM” and, together with Citi, the “Initial Purchasers”), WMIHC entered into a Registration Rights Agreement with the Initial Purchasers (the “Registration Rights Agreement”), pursuant to which WMIHC has agreed that, subject to certain conditions, WMIHC will use its reasonable efforts to (i) file a shelf registration statement covering resales of common stock issuable upon mandatory conversion of the Series B Preferred Stock pursuant to Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”) no later than six months after January 5, 2015 (the “Issue Date”); (ii) file a shelf registration statement covering resales of the Series B Preferred Stock pursuant to Rule 415 under the Securities Act no later than one year after the Issue Date; and (iii) cause each of these shelf registration statements to be declared effective under the Securities Act.
	The foregoing description of the Registration Rights Agreement is qualified in its entirety by the provisions of the Registration Rights Agreement, filed on Form 8-K on January 5, 2015, as Exhibit 10.1 and incorporated by reference herein.
	On January 5, 2015, in connection with the offering and pursuant to the Purchase Agreement, WMIHC entered into an Escrow Agreement (the “Escrow Agreement”) with Citibank, N.A., as Escrow Agent (the “Escrow Agent”), pursuant to which WMIHC caused to be deposited with the Escrow Agent the amount of $598,500,000, representing the proceeds of the offering of Series B Preferred Stock less offering fees payable on the Issue Date but before payment of other offering fees and expenses (including fees contingent upon future events). These net proceeds will be released from escrow from time to time to WMIHC as instructed by WMIHC in amounts necessary to (i) pay certain fees related to the offering that may become payable to the Initial Purchasers, (ii) finance WMIHC’s efforts to explore and/or fund, in whole or in part, acquisitions whether completed or not, including reasonable attorney fees and expenses, accounting expenses, due diligence and financial advisor fees and expenses, (iii) pay certain amounts that may become payable to the holders of the Series B Preferred Stock upon the occurrence of certain put events, (iv) pay certain amounts that would become payable to the holders of the Series B Preferred Stock upon a mandatory redemption of the Series B Preferred Stock, and (v) pay certain expenses related to the offering. The entire net proceeds will be released from escrow as instructed by WMIHC upon a Qualified Acquisition (as defined in the Escrow Agreement). The foregoing description of the Escrow Agreement is qualified in its entirety by the provisions of the Escrow Agreement, filed on Form 8-K on January 5, 2015, as Exhibit 10.2 and incorporated by reference herein.
	The Series B Preferred Stock are hybrid financial instruments that blend characteristics of both equity and debt securities.  The terms of the Series B Preferred Stock provide for either redemption of the principal and interest for cash at maturity or in the event of certain predetermined circumstances (“Forward Component”) or mandatory conversion into WMIHC’s common stock (“Embedded Conversion Feature” or “ECF”).  The Series B Preferred Stock also embody contingent equity-linked share price protections on the ECF in the form of a variable conversion price based on a 20 trading day average of volume weighted average price.  The Series B Preferred Stock shall convert based on the outstanding principal and accrued interest, subject to a floor of $1.75 per share of common stock and a maximum of $2.25 per share.  As a result, the Company determined that the Series B Preferred Stock contain certain embedded derivative features.  Management’s evaluation resulted in the conclusion that the compound derivative financial instrument required bifurcation and separately accounted for the embedded conversion feature option as a derivative liability.  The aggregate fair value of the embedded conversion feature was $66.2 million on the date of issuance of the Series B Preferred Stock.  At March 31, 2015 and December 31, 2014 the fair value of the embedded conversion feature was $59.0 million and zero, respectively.  The change in fair value between December 31, 2014, and March 15, 2015 of $7.2 million is included in the condensed consolidated statement of operations for the period ended March 31, 2015.   The Series B Preferred Stock was not issued until January 5, 2015, therefore there was no embedded conversion feature outstanding as of December 31, 2014 and, consequently no change in embedded conversion feature for any quarterly or annual period prior to the period ended March 31, 2015.
	WMIHC issued no restricted stock grants during the three months ended March 31, 2015. During the year ended December 31, 2014, WMIHC issued restricted stock grants to members of our Corporate Strategy and Development Committee and our Chairman, Michael Willingham, totaling $0.6 million of aggregate intrinsic value and additionally issued restricted stock grants to members of the Board totaling $0.7 million of aggregate intrinsic value. The restricted shares vest over a three year period and the resulting unamortized value related to the unvested restricted share grants totals $0.8 million and $1.2 million at March 31, 2015 and December 31, 2014, respectively.
	The unamortized value of $0.8 million at March 31, 2015, if all are ultimately vested, would be amortized according to the following schedule.
	Amortization Schedule		March 31, 2015 Unvested $ value
	(in thousands)
	2nd quarter 2015		$	130
	3rd quarter 2015		130
	4th quarter 2015		130
	1st quarter 2016		125
	2nd quarter 2016		92
	3rd quarter 2016		92
	4th quarter 2016		92
	1st quarter 2017		57
	Total unamortized value		$	848
	Net equity-based compensation totaled $384 thousand and $129 thousand for the three months ended March 31, 2015 and 2014, respectively. The restricted stock awards were issued at the fair market value determined to be the trading price at the close of business on the respective date the awards were granted.
	A summary of WMIHC’s restricted stock award activity for the three months ended March 31, 2015 and year ended December 31, 2014 is presented below:
			Number of restricted stock awards outstanding			Weighted-average grant date fair value		Aggregate intrinsic value
								(in thousands)
	Outstanding—January 1, 2014			1,842,351		$	0.6787	$	1,250
	Restricted stock awards granted during 2014			500,894		2.6602			1,332
	Restricted stock awards released or forfeited during 2014			—			—		—
	Outstanding—December 31, 2014			2,343,245			1.1023		2,582
	Restricted stock awards granted during 2015			—			—		—
	Restricted stock awards released or forfeited during 2015			—			—		—
	Outstanding—March 31, 2015			2,343,245		$	1.1023	$	2,582
	WMIHC has issued the total number of shares subject to the restricted stock grants, however, until vested they are subject to repurchase. Shares subject to repurchase totaled 562,676 on March 31, 2015 and 1,343,764 on December 31, 2014. The shares subject to repurchase at March 31, 2015 will vest according to the following schedule:
	Vesting schedule of shares subject to repurchase		March 31, 2015 Unvested Shares
	2nd quarter 2015			—
	3rd quarter 2015			—
	4th quarter 2015			—
	1st quarter 2016			395,717
	2nd quarter 2016			—
	3rd quarter 2016			—
	4th quarter 2016			—
	1st quarter 2017			166,959
	Total			562,676
	Pursuant to a restricted stock agreement, WMIHC has the right, but not the obligation, to repurchase any unvested (but issued) shares of common stock at $0.0001 per share upon the termination of service in the case of a director.
	A summary of the Company’s restricted shares issued and subject to repurchase as of the three months ended March 31, 2015 and year ended December 31, 2014 is presented below:
	Vesting schedule of shares subject to repurchase		Unvested Shares
	Shares subject to repurchase—January 1, 2014			1,456,987
	Shares issued subject to vesting during 2014			500,894
	Unvested shares repurchased during 2014			—
Shares vested during 2014			(614,117	)
Shares subject to repurchase—December 31, 2014			1,343,764
Shares issued subject to vesting during 2015			—
Unvested shares repurchased during 2015			—
Shares vested during 2015			(781,088	)
Shares subject to repurchase—March 31, 2015			562,676
On April 28, 2015, WMIHC issued 269,234 restricted stock grants to members of the Board totaling $0.7 million of aggregate intrinsic value.  The share price was determined based on the closing sales price of $2.60 on the date of the award.
Contingent on the reincorporation of WMIHC from Washington to Delaware as more fully described in Note 14: Subsequent Events,   and as a condition of voluntarily tendering their resignations from the WMIHC Board of Directors and WMIHC accepting the resignation of Mark E. Holliday and Timothy R. Graham as Directors, all restricted shares held by Mr. Holliday and Mr. Graham issued but unvested on the date of reincorporation will be immediately vested. A total of 190,070 shares, which were previously scheduled to vest over the next three years, would vest early (“Early Vesting”).  Of the Early Vesting shares 113,146 were outstanding as of March 31, 2015 and the balance were issued in conjunction with the annual meeting of shareholders on April 28, 2015 as more fully described in Note 14: Subsequent Events.  This Early Vesting resulted in a one-time charge to compensation and a corresponding increase in additional paid in capital totaling $182 thousand during the three months ended March 31, 2015.
As of March 31, 2015 and December 31, 2014, 202,343,245 shares of WMIHC’s common stock were issued and outstanding. As of March 31, 2015 and December 31, 2014, 1,000,000 shares of WMIHC’s Series A Convertible Preferred Stock were issued and outstanding. As of March 31, 2015 and December 31, 2014, 600,000 shares and zero shares of WMIHC’s Series B Preferred Stock were issued and outstanding, respectively. As of March 31, 2015 and December 31, 2014, 61,400,000 warrants to purchase WMIHC’s common stock were issued and outstanding.
See Note 12: Net Income (Loss) Per Common Share for further information on shares used for EPS calculations.

Pending_Litigation

Pending Litigation	3 Months Ended
	Mar. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Pending Litigation	Note 10: Pending Litigation
	As of March 31, 2015, the Company was not a party to, or aware of, any pending legal proceedings or investigations requiring disclosure at this time.

Restriction_on_Distribution_of

Restriction on Distribution of Net Assets from Subsidiary	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Restriction on Distribution of Net Assets from Subsidiary	Note 11: Restriction on Distribution of Net Assets from Subsidiary
	WMMRC has net assets totaling $53.4 million and $54.9 million as of March 31, 2015 and December 31, 2014, respectively. These net assets are not immediately available for distribution to WMIHC due to restrictions imposed by trust agreements, and the requirement that the Insurance Commissioner of the State of Hawaii must approve dividends from WMMRC. Distributions from WMMRC to WMIHC are further restricted by the terms of the Runoff Notes described in Note 7: Notes Payable.

Net_Income_Loss_Per_Common_Sha

Net Income (Loss) Per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Income (Loss) Per Common Share	Note 12: Net Income (Loss) Per Common Share
	Basic and diluted net income (loss) per share attributable to common shareholders is computed by dividing net income (loss) by the weighted average number of common shares outstanding after subtracting the weighted average of unvested restricted shares outstanding, as these shares are subject to repurchase. There were no dilutive effects from any equity instruments for periods presented which did not have net income, therefore diluted net income (loss) per share was the same as basic net income (loss) for periods that reflect a net loss.
	Diluted net income per share is computed by dividing the net income for the period by the weighted average number of common shares outstanding after subtracting the weighted average of any unvested restricted shares outstanding and adding any potentially dilutive common equivalent shares outstanding during the period, if dilutive. Potentially dilutive common equivalent shares are composed of the incremental common shares issuable upon the exercise of warrants for common stock and the potential conversion of preferred shares to common shares, none of which were outstanding prior to January 30, 2014.   There were no dilutive effects for the three months ended March 31, 2014 or for the year ended December 31, 2014 as the Company reported a net loss attributable to common shareholders for the periods.
	The following table presents the calculation of basic net income (loss) per share for periods presented:
	(in thousands, except per share data):
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Numerator for basic and diluted net income (loss) per share:
	Net income (loss)	$	5,501		$	(3,380	)
	Preferred deemed dividend		—			(9,455	)
	Series B preferred stock dividends		(4,248	)		—
	Net income (loss) attributable to common shareholders	$	1,253		$	(12,835	)
	Denominator for basic net income (loss) per share:
	Weighted-average shares outstanding		202,343,245			201,978,462
	Weighted-average unvested restricted shares outstanding		(1,196,680	)		(1,504,392	)
	Denominator for basic net income (loss) per share:		201,146,565			200,474,070
	Basic net  income (loss) per share attributable to common shareholders	$	0.01		$	(0.06	)
	The following table presents the calculation of diluted net income (loss) per share for periods presented:
	(in thousands, except per share data):
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Numerator for basic and diluted net income (loss) per share:
	Net income (loss)	$	5,501		$	(3,380	)
	Preferred deemed dividend		—			(9,455	)
	Series B preferred stock dividends		(4,248	)		—
	Net income (loss) attributable to common shareholders	$	1,253		$	(12,835	)
	Denominator for diluted net income (loss) per share:
	Weighted-average shares outstanding		202,343,245			201,978,462
	Weighted-average unvested restricted shares outstanding		(1,196,680	)		(1,504,392	)
	Effect of dilutive potential shares *		301,292,296			—
	Denominator for diluted net income (loss) per share:		502,438,861			200,474,070
	Diluted net income (loss) per share attributable to common shareholders	$	0		$	(0.06	)
	*There were no dilutive effects from any equity instruments for periods presented which did not have net income, therefore diluted net income (loss) per share was the same as basic net income (loss) for periods presented which reflect a net loss.

Fair_Value_Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 13: Fair Value Measurement
	We use a fair-value approach to value certain liabilities. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. We use a fair value hierarchy, which distinguishes between assumptions based on market data (observable inputs) and an entity’s own assumptions (unobservable inputs). The hierarchy consists of three levels:
	•	Level one — Quoted market prices in active markets for identical assets or liabilities;
	•	Level two — Inputs other than level one inputs that are either directly or indirectly observable; and
	•	Level three — Unobservable inputs developed using estimates and assumptions, which are developed by the reporting entity and reflect those assumptions that a market participant would use.
	Determining which category an asset or liability falls within the hierarchy requires significant judgment. We evaluate our hierarchy disclosures each quarter. Assets and liabilities measured at fair value on a recurring basis are summarized as follows:
	The financial instrument that is measured at fair value on a recurring basis is summarized as follows as of March 31, 2015:
	Liabilities		Level 1			Level 2		Level 3		31-Mar-15
	Derivative liability - embedded conversion feature		$	—		$	—	$	58,967	$	58,967
	At December 31, 2014 we had no Level 3 liabilities measured at fair value.
	The following table shows the change in Level 3 liability measured at fair value on a recurring basis for the period ended March 31, 2015:
			Derivative liability embedded conversion feature
	Balance, December 31, 2014		$	—
	Issuance during 2015			66,227
	Unrealized gain on change in fair value			(7,260	)
	Balance, March 31, 2015		$	58,967
	On January 5, 2015, WMIHC raised $600 million of capital (less transaction costs) through the issuance of 600,000 Series B Preferred Shares. The shares carry a liquidation preference of $1,000 per share, equal to their initial purchase price. In addition, they have a mandatory redemption right three years from issuance date at a price equal to the initial investment amount, and accrue dividends at 3.00% per annum.
	The purpose of the capital raise was principally to pursue strategic acquisitions of operating companies that fit the Company’s desired business model. Management intends to pursue such an acquisition or acquisitions with the proceeds of the capital raise, and should it occur during the three year term of the Series B Preferred Stock, there is a mandatory conversion of these shares into common stock of WMIHC.   Mandatory conversion occurs at a price that is the lesser of:
	i)	$2.25 per share of WMIHC common stock (the “Initial Conversion Price”); and
	ii)	the arithmetic average of daily volume weighted average prices of WMIHC’s common stock during the 20 trading day period ending on the trading day immediately preceding the public announcement by WMIHC of its entry into a definitive agreement for such acquisition, subject to a floor of $1.75 per share of common stock (the “Floor Price”).
	We use a binomial lattice option pricing model to value the embedded conversion feature that is subject to fair value liability accounting. The key inputs which we utilize in the determination of the fair value as of the reporting date include our stock price as well as assumptions regarding a number of complex and subjective variables. These variables include, but are not limited to, expected stock price volatility over the term of the convertible preferred securities and risk-free interest rate. In addition, the model requires the input of an expected probability of occurrence and the timing of a Qualified Acquisition which initiates the mandatory conversion.   The fair value of the embedded conversion feature liability is revalued each balance sheet date utilizing our model computations with the decrease or increase in fair value being reported in the statement of operations as unrealized gain or (loss) on change in fair value of derivative liability - embedded conversion feature, respectively. The primary factors affecting the fair value of the embedded conversion feature liability are the probability of occurrence and timing of a Qualified Acquisition, our stock price and our stock price volatility. In addition, the use of a model requires the input of subjective assumptions, and changes to these assumptions could provide differing results.
	Our reported net income was approximately $5.5 million for the three months ended March 31, 2015. If the closing stock price of our common stock had been 10% lower, our net income would have been approximately $37.1 million higher. If the closing stock price of our common stock had been 10% higher, our net income would have been approximately $37.2 million lower. If our volatility assumption on March 31, 2015 had been 10% lower, our net income would have been approximately $11.5 million higher and if our volatility assumption had been 10% higher, our net income would have been approximately $11.3 million lower. If our probability of a transaction occurring assumption on March 31, 2015 had been 10% lower, our net income would have been approximately $6.6 million higher and if our probability of a transaction occurring assumption had been 10% higher, our net income would have been approximately $6.6 million lower.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 14: Subsequent Events
	At March 31, 2015, WMIHC held $3.1 million in restricted cash which had been received from WMMRC prior to March 31, 2015. Prior to this transfer the use of these assets was restricted as described in Note 11: Restriction on Distribution of Net Assets from Subsidiary. This cash was transferred to WMIHC as restricted cash upon approval for distribution by the Insurance Commissioner of the State of Hawaii. On April 15, 2015, WMIHC fully redeemed the First Lien Notes which included the remaining principal outstanding of $665 thousand of principal and $11 thousand of interest which represented accrued interest through April 14, 2015.  The restricted cash remaining in the Collateral Account will be used to reduce the issuer secondary amount in accordance with the Second Lien Indenture, which totals $9.0 million at March 31, 2015 and continues to earn interest at a coupon rate of 13%.  The issuer secondary amount is required to be paid (payments of issuer secondary amounts occur by transfer from restricted cash to unrestricted cash) prior to any payment of interest and principal on the Second Lien Notes.  The principal balance of the Second Lien Notes totaled $29.2 million at April 30, 2015.
	The Company has made its annual restricted stock grants to members of our Board of Directors, totaling $0.7 million of aggregate intrinsic value on April 28, 2015, the date of our Annual Meeting of Shareholders, under the Company’s 2012 Plan in connection with the Company’s director compensation program.
	On April 28, 2015, WMIHC’s shareholders approved the planned reincorporation from the State of Washington to the State of Delaware.  As a result of this reincorporation, WMI Holdings Corp. name will change to WMIH Corp., (“WMIH”), WMIH’s Board of Directors will be increased from 7 to up to a maximum of 11 members and WMIH will be authorized to issue up to 3,500,000,000 shares of common stock and up to 10,000,000 shares of preferred stock, each with a par value of $0.00001 per share.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation
	WMIHC resumed filing all periodic reports for a reporting company under the Exchange Act for all periods after the Effective Date. Subsequent to the Effective Date, we have timely filed our Exchange Act periodic reports.
	The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for quarterly reporting. Certain information and footnote disclosures normally included in the financial statements and prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted pursuant to such rules and regulations; however, the Company believes that the disclosures included are appropriate. The condensed consolidated balance sheet as of December 31, 2014, included herein, was derived from the audited consolidated financial statements as of that date.
	These interim unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the Company’s consolidated financial statements and notes thereto filed in the Company’s Annual Report on Form 10-K, filed with the SEC on February 27, 2015. Interim information presented in the unaudited condensed consolidated financial statements has been prepared by management. In the opinion of management, the financial statements include all adjustments necessary for a fair presentation and that all such adjustments are of a normal, recurring nature and necessary for the fair statement of the financial position, results of operations and cash flows for the periods presented in accordance with GAAP. The results of operations for the period ended March 31, 2015 are not necessarily indicative of the results to be expected for the full year ending December 31, 2015.
	All significant intercompany transactions and balances have been eliminated in preparing the condensed consolidated financial statements.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Management has made significant estimates in certain areas, including valuing certain financial instruments and other assets, the determination of the contingent risk liabilities, and in determining appropriate insurance reserves. Actual results could differ substantially from those estimates.
Fair Value of Certain Financial Instruments	Fair Value of Certain Financial Instruments
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Generally, for assets that are reported at fair value, the Company uses quoted market prices or valuation models to estimate their fair value. These models incorporate inputs such as forward yield curves, market volatilities and pricing spreads, utilizing market-based inputs where readily available. The degree of management judgment involved in estimating the fair value of a financial instrument or other asset is dependent upon the availability of quoted market prices or observable market inputs. For financial instruments that are actively traded in the marketplace or whose values are based on readily available market value data, little judgment is necessary when estimating the instrument’s fair value. When observable market prices and data are not readily available, significant management judgment often is necessary to estimate fair value. In those cases, different assumptions could result in significant changes in valuation.
	The Company classifies fixed-maturity investments as trading securities, which are recorded at fair value. As such, changes in unrealized gains and losses on investments held at the balance sheet date are recognized and reported as a component of net investment income on the statement of operations. The Company believes fair value provides better matching of investment earnings to potential cash flow generated from the investment portfolio and reduces subjectivity related to evaluating other-than-temporary impairment on the Company’s investment portfolio.
	The carrying value of cash and cash equivalents, restricted cash, accounts payable and accrued liabilities approximates their fair value because of their short term nature.
	The carrying value of the derivative liability - embedded conversion feature of the Series B Preferred Stock is adjusted to its fair value as determined using level 3 inputs described below under fair value measurements.
	The carrying value of notes payable approximates fair value based on time to maturity, underlying collateral, and prevailing interest rates.
Fair Value Option	Fair Value Option
	The Company has recorded a liability related to a loss contract fair market value reserve (the “Reserve”) and applies Financial Accounting Standards Board (“FASB”) Fair Value Option accounting guidance to this liability. The Reserve was initially established in compliance with Accounting Standards Codification (“ASC”) 805-10-55-21(b)(1) which defines a loss contract as a “contract in which the unavoidable costs of meeting the obligations under the contract exceed the economic benefits expected to be received under it.” The Company recorded this Reserve to properly value the net economic value of the WMMRC subsidiary. At each reporting date, the Company reassesses the loss contract reserve which may result in a change to this line item in the balance sheet and a corresponding contra-expense which is reflected in the statement of operations. Accordingly, any changes in the reserve at the balance sheet date are recognized and reported within the loss contract reserve fair market value change in the statement of operations. The Company believes Fair Value Option accounting provides better matching of earnings to potential cash flow generated from the WMMRC operating business.
Fair Value Measurement	Fair Value Measurement
	The Company’s estimates of fair value for financial assets and financial liabilities are based on the framework established in the FASB Fair Value Measurements and Disclosures accounting guidance. The framework is based on the inputs used in valuation and requires that observable inputs be used in the valuations when available. The disclosure of fair value estimates in the fair value accounting guidance hierarchy is based on whether the significant inputs into the valuation are observable. In determining the level of the hierarchy in which the estimate is disclosed, the highest priority is given to unadjusted quoted prices in active markets and the lowest priority to unobservable inputs that reflect the Company’s significant market assumptions.
	The three levels of the hierarchy are as follows:
	Level 1–Inputs to the valuation methodology are quoted prices for identical assets or liabilities traded in active markets.
	Level 2–Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market corroborated inputs.
	Level 3–Valuations based on models where significant inputs are not observable. The unobservable inputs reflect the Company’s own assumptions about the inputs that market participants would use.
	Fair values are based on quoted market prices when available (Level 1). The Company receives the quoted market prices from a third party, nationally recognized pricing service. When market prices are not available, the Company utilizes a pricing service to determine an estimate of fair value. The fair value is generally estimated using current market inputs for similar financial instruments with comparable terms and credit quality, commonly referred to as matrix pricing (Level 2). These valuation techniques involve some level of management estimation and judgment. The Company recognizes transfers between levels in the fair value hierarchy at the end of the reporting period.
Fixed-Maturity Securities	Fixed-Maturity Securities
	Fixed-maturity securities consist of U.S. Treasury securities, obligations of U.S. government agencies, commercial paper and domestic and foreign corporate debt securities. Fixed-maturity securities held in trust are for the benefit of the primary insurers as more fully described in Note 3: Insurance Activity. Investments in fixed-maturity securities are reported at their estimated fair values and are classified as trading securities in accordance with applicable accounting guidance. Realized gains and losses on the sale of fixed-maturity securities are determined using the specific identification method and are reported as a component of net investment income within the statement of operations.
Cash Equivalents and Investments Held in Trust	Cash Equivalents and Investments Held in Trust
	Cash equivalents, which include highly liquid overnight money market instruments, and fixed-maturity securities are held in trust for the benefit of the primary insurers, as more fully described in Note 3: Insurance Activity, are subject to the restrictions on distribution of net assets of subsidiaries as described below.
Third Party Restrictions on Distribution of Net Assets of Wholly-Owned Subsidiaries	Third Party Restrictions on Distribution of Net Assets of Wholly-Owned Subsidiaries
	The net assets of WMMRC are subject to restrictions from distribution from multiple sources including the primary insurers who have approval control of distribution from the trust, the Insurance Commissioner of the State of Hawaii who has approval control prior to distributions or intercompany advances, and additional restrictions as described in Note 7: Notes Payable.
Premium Recognition	Premium Recognition
	Premiums assumed are earned on a daily pro-rata basis over the underlying policy terms. Premiums assumed relating to the unexpired portion of policies in force at the balance sheet date are recorded as unearned premiums. Unearned premiums also include a reserve for post default premium reserves. Post default premium reserves occur when a loan is in a default position and the servicer continues to advance the premiums. If the loan ultimately goes to claim, the premiums advanced during the period of default are subject to recapture. The Company records a default premium reserve based on information provided by the underlying mortgage insurers when they provide information on the default premium reserve separately from other reserves. The change in the default premium reserve is reflected as a reduction or increase, as the case may be, in premiums assumed. The Company has recorded unearned premiums totaling $0.9 million and $1.1 million as of March 31, 2015 and December 31, 2014, respectively.
	The Company recognizes premium deficiencies when there is a probable loss on an insurance contract. Premium deficiencies are recognized if the sum of the present value of expected losses and loss adjustment expenses, unamortized deferred acquisition costs, and maintenance costs exceed expected future unearned premiums and anticipated investment income. Premium deficiency reserves have been recorded totaling $2.3 million and $2.3 million as of March 31, 2015 and December 31, 2014, respectively.
	The Company’s premium deficiency analysis was performed on a single book basis and includes all book years and reinsurance treaties aggregated together using assumptions based on the actuarial best estimates at the balance sheet date. The calculation for premium deficiency requires significant judgment and includes estimates of future expected premiums, claims, loss adjustment expenses and investment income as of the balance sheet date. To the extent ultimate losses are higher or premiums are lower than estimated, additional premium deficiency reserves may be required in the future.
Cash and Cash Equivalents	Cash and Cash Equivalents
	Cash and cash equivalents include cash on hand, amounts due from banks, U.S. Treasury bills and overnight investments. Except as described above in Cash Equivalents and Investments Held in Trust, the Company considers all amounts that are invested in highly liquid overnight money market instruments to be cash equivalents. The FDIC insures amounts on deposit with each financial institution up to limits as prescribed by law. The Company may hold funds with financial institutions in excess of the FDIC insured amount, however, the Company has not experienced any losses in such accounts and management believes it is not exposed to any significant credit risk on cash and cash equivalents.
Restricted Cash	Restricted Cash
	Restricted cash includes (i) amounts held for the express purposes of paying principal, interest, issuer secondary amounts and related fees on the Runoff Notes (as defined in Note 7: Notes Payable) pursuant to the terms of the Indentures (as defined in Note 7: Notes Payable) and (ii) proceeds of the Series B Preferred Stock offering held in escrow.
Ceding Commission Expense	Ceding Commission Expense
	The Company is required to pay a ceding commission to certain primary insurers pursuant to certain reinsurance agreements.
Losses and Loss Adjustment Reserves	Losses and Loss Adjustment Reserve
	The losses and loss adjustment reserve includes case basis estimates of reported losses and supplemental amounts for incurred but not reported losses (“IBNR”). A default is considered the incident (e.g., the failure to make timely payment of mortgage payments) that may give rise to a claim for mortgage insurance. In establishing the losses and loss adjustment reserve, the Company utilizes the findings of an independent consulting actuary. The consulting actuary estimates ultimate loss rates based upon industry data and claims and exposure data provided by the primary mortgage insurance carriers and assumptions of prepayment speed relative to loans reinsured by the Company. The fully developed ultimate loss rates are then applied to cumulative earned premium and reduced for cumulative losses and loss adjustment expenses paid to arrive at the liability for unpaid losses and loss adjustment expenses. Actuarial methods utilized by the consulting actuary to derive the ultimate loss rates include the loss development method, simulated loss development method, Bornhuetter-Ferguson method and simulated Bornhuetter-Ferguson method on a paid and incurred basis. Due to the current condition of the mortgage insurance market, WMMRC has recorded reserves at the higher of (x) reserves estimated by the consulting actuary for each primary mortgage guaranty carrier and (y) ceded case reserves and IBNR levels reported by the primary mortgage guaranty carriers as of March 31, 2015 and December 31, 2014, respectively. Management believes that the recorded aggregate liability for unpaid losses and loss adjustment expenses at period end represents the Company’s best estimate, based upon the available data, of the amount necessary to cover the current cost of losses. However, due to the inherent uncertainty arising from fluctuations in the persistency rate of mortgage insurance claims, the Company’s size and lack of prior operating history, external factors such as future changes in regional or national economic conditions, judicial decisions, federal and state legislation related to mortgage restructuring and foreclosure restrictions, claims denials and coverage rescissions by primary carriers and other factors beyond the Company’s control, it is not presently possible to determine whether actual loss experience will conform to the assumptions used in determining the estimated amounts for such liability at the balance sheet date. Accordingly, the ultimate liability could be significantly higher or lower, as the case may be, of the amount indicated in the financial statements and there can be no assurance that the reserve amounts recorded will be sufficient. As adjustments to these estimates become necessary, such adjustments are reflected in current operations.
Loss Contract Fair Market Value Reserves	Loss Contract Fair Market Value Reserve
	A loss contract fair market value reserve relating to contractual obligations of WMMRC was established at March 19, 2012 as a result of applying fresh start accounting and in compliance with ASC 805-10-55-21(b)(1) which defines a loss contract as a “contract in which the unavoidable costs of meeting the obligations under the contract exceed the economic benefits expected to be received under it.” The fair market value of this reserve is analyzed quarterly and is adjusted accordingly. This adjustment to the reserve produces an expense or contra-expense in the statement of operations.
Fresh Start Accounting	Fresh Start Accounting
	The Company adopted fresh start accounting in accordance with ASC 852 (Reorganizations) (“ASC 852”) upon emergence from bankruptcy on March 19, 2012. Under ASC 852, the application of fresh start accounting results in the allocation of reorganization value to the fair value of assets, and is required when (a) the reorganization value of assets immediately prior to confirmation of a plan of reorganization is less than the total of all post-petition liabilities and allowed claims and (b) the holders of voting shares immediately prior to the confirmation of the plan of reorganization receive less than 50 percent of the voting shares of the emerging entity. The Company adopted fresh start accounting as of the Effective Date, which represents the date on which all material conditions precedent to the effectiveness of the Plan were satisfied or waived. As of the Effective Date, the Company believes that it satisfied both of the aforementioned conditions.
	The Company’s reorganization value (“Equity Value”), upon emergence from bankruptcy, was determined to be $76.6 million, which represented management’s best estimate of fair value based on a calculation of the present value of the Company’s consolidated assets and liabilities as at March 19, 2012. As part of our fresh start reporting, we applied various valuation methodologies to calculate the reorganization value of the Company. These methods included (a) the comparable company analysis, (b) the precedent transactions analysis and (c) the discounted cash flow analysis. The application of these methodologies requires certain key estimates, judgments and assumptions, including financial projections, the amount of cash available to fund operations and current market conditions. Such projections, judgments and assumptions are inherently subject to significant uncertainties and there can be no assurance that such estimates, assumptions and projections reflected in the valuation will be realized and actual results may vary materially. The Company filed a Form 8-K pertaining to emergence from bankruptcy and subsequently filed a Form 8-K/A, which included WMIHC’s audited balance sheet as of the Effective Date.
Comprehensive Income (Loss)	Comprehensive Income (Loss)
	The Company has no comprehensive income (loss) other than the net income (loss) disclosed in the condensed consolidated statement of operations.
Net (Loss) Per Common Share	Net Income (Loss) Per Common Share
	Basic income (loss) per common share is computed by dividing net income (loss) applicable to the Company’s common shareholders by the weighted average number of common shares outstanding for the period after subtracting the weighted average of any unvested restricted shares outstanding, as these are subject to repurchase. Diluted net income (loss) per common share is computed by dividing net income (loss) applicable to the Company’s common shareholders by the weighted average number of common shares outstanding during the period after subtracting the weighted average of any unvested restricted shares outstanding, as these are subject to repurchase and the effect of all dilutive common stock equivalents. If common share equivalents exist, in periods where there is a net loss, diluted loss per common share would be equal to or less than basic loss per common share, since the effect of including any common share equivalents would be antidilutive.
Equity Based Compensation	Equity-Based Compensation
	On May 22, 2012, WMIHC’s Board of Directors (the “Board”) approved the Company’s 2012 Long-Term Incentive Plan (the “2012 Plan”) to award restricted stock to its non-employee directors and to have a plan in place for awards to executives and others in connection with the Company’s operations and future strategic plans. A total of 2 million shares of common stock were initially reserved for future issuance under the 2012 Plan, which became effective upon the Board approval on May 22, 2012. On February 10, 2014, the Board approved and adopted a First Amendment to the 2012 Plan, pursuant to which the number of shares of WMIHC’s common stock reserved and available for grants under the 2012 Plan was increased from 2.0 million shares to 3.0 million shares, and that modified the terms under which the 2012 Plan may be amended to permit such an increase through action of the Board except when shareholder approval is necessary to comply with any applicable law, regulation or rule of any stock exchange on which WMIHC’s shares are listed, quoted or traded. On February 25, 2015, the number of shares authorized and available for awards under the 2012 Plan was increased from 3.0 million to 12.0 million shares of WMIHC’s common stock, subject to approval of shareholders of WMIHC.  This approval was received at the Company’s Annual Meeting of Shareholders on April 28, 2015.  The 2012 Plan provides for the granting of restricted shares, stock options and other cash and share based awards. The value of restricted stock is determined using the fair market value determined to be the trading price at the close of business on the respective date the awards were granted.
Income Taxes	Income Taxes
	The Company follows the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future income tax consequences attributable to differences between the carrying amounts and tax bases of assets and liabilities and losses carried forward and tax credits. Deferred tax assets and liabilities are measured using enacted tax rates and laws applicable to the years in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is provided to the extent that it is more likely than not that deferred tax assets will not be realized.
	The Company recognizes the financial statement effects of a tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. Penalties and interest, of which there are none, would be reflected in income tax expense. Tax years are open to the extent the Company has net operating loss carry-forwards available to be utilized currently.
Reclassification	Reclassification
	Certain prior period balances have been reclassified to conform with the basis of presentation used as of March 31, 2015.
Dividend Policy	Dividend Policy
	WMIHC has paid no dividends on its common stock on or after the Effective Date and currently has no plans to pay a dividend on its common stock. The Note Purchase Agreement (as such is defined in Note 8: Financing Arrangements) includes restrictions related to the payment of dividends.
	WMIHC has declared and paid $3.5 million of dividends on its Series B Preferred Stock and has accreted an additional $0.7 million of dividends based on the 3% interest rate during the three months ended March 31, 2015.   The Series B Preferred Stock was issued on January 5, 2015, therefore no dividends were due or paid for any prior period.
New Accounting Pronouncements	New Accounting Pronouncements
	In April 2015 the FASB issued Accounting Standards Update 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.  This update, requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company has reviewed this standard and determined it has no material impact on the Company’s consolidated financial position, results of operations or disclosure requirements.

Insurance_Activity_Tables

Insurance Activity (Tables)	3 Months Ended
	Mar. 31, 2015
Insurance [Abstract]
Schedule of Premiums Assumed and Earned	Premiums assumed and earned are as follows for the periods ended March 31, 2015 and 2014, respectively:
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Premiums assumed	$	1,189		$	2,039
	Change in unearned premiums		160			127
	Premiums earned	$	1,349		$	2,166
Components of Liability for Losses and Loss Adjustment Reserves	The components of the liability for losses and loss adjustment reserves are as follows as of March 31, 2015 and December 31, 2014, respectively:
		March 31, 2015			December 31, 2014
	Case-basis reserves	$	5,888		$	16,538
	IBNR reserves		100			110
	Premium deficiency reserves		2,299			2,299
	Total losses and loss adjustment reserves	$	8,287		$	18,947
Summary of Losses and Loss Adjustment Reserve Activity	Losses and loss adjustment reserve activity are as follows for the three months ended March 31, 2015 and the year ended December 31, 2014, respectively:
		March 31, 2015			December 31, 2014
	Balance at beginning of period	$	18,947		$	44,314
	Incurred (released) - prior periods		(541	)		3,281
	Paid - prior periods		(10,119	)		(28,648	)
	Total losses and loss adjustment reserves	$	8,287		$	18,947

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses and Estimated Fair Values of Fixed-Maturity Securities	The amortized cost, gross unrealized gains, gross unrealized losses and estimated fair values of total fixed-maturity securities and total fixed-maturity securities held in trust at March 31, 2015, are as follows:
		March 31, 2015
		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses				Estimated Fair Value
	Obligations of U.S. government sponsored enterprises	$	75,474		$	6		$	(16	)		$	75,464
	Corporate debt securities		28,264			331			(8	)			28,587
	Commercial paper		4,998			1			—				4,999
	Foreign corporate debt securities		10,899			57			(7	)			10,949
	Total fixed-maturity securities		119,635			395			(31	)			119,999
	Less total unrestricted fixed-maturity securities		74,041			147			(5	)			74,183
	Total fixed-maturity securities held in trust	$	45,594		$	248		$	(26	)		$	45,816
	The amortized cost, gross unrealized gains, gross unrealized losses and estimated fair values of total fixed-maturity securities and total fixed-maturity securities held in trust at December 31, 2014, are as follows:
		December 31, 2014
		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses				Estimated Fair Value
	Obligations of U.S. government sponsored enterprises	$	6,491		$	12		$	(28	)		$	6,475
	Corporate debt securities		41,018			531			(65	)			41,484
	Commercial paper		—			—			—				—
	Foreign corporate debt securities		12,693			47			(58	)			12,682
	Total fixed-maturity securities		60,202			590			(151	)			60,641
	Less total unrestricted fixed-maturity securities		7,895			179			(11	)			8,063
	Total fixed-maturity securities held in trust	$	52,307		$	411		$	(140	)		$	52,578
Schedule of Amortized Cost and Estimated Fair Value of Fixed-Maturity Securities by Contractual Maturity
	Amortized cost and estimated fair value of fixed-maturity securities at March 31, 2015 by contractual maturity are as follows:
		Amortized			Estimated
		Cost			Fair Value
	Maturity in:
	2015	$	85,087		$	85,122
	2016-2019		34,548			34,877
	Total fixed-maturity securities	$	119,635		$	119,999
Summary of Net Investment Income (Loss)	Net investment income (loss) for the periods ended March 31, 2015 and 2014, respectively, is summarized as follows:
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Investment income (loss):
	Amortization of premium or discount on fixed-maturity securities	$	(179	)	$	(529	)
	Investment income on fixed-maturity securities		413			1,102
	Interest income on cash and equivalents		57			2
	Realized net gain (loss) from sale of investments		186			27
	Unrealized (losses) gains on trading securities held at period end		(76	)		66
	Net investment income (loss)	$	401		$	668
Schedule of Investments in Accordance with Fair Value Measurement	The following table shows how the Company’s investments are categorized in accordance with fair value measurement, as of March 31, 2015:
		March 31, 2015
		Level 1			Level 2			Level 3				Total
	Class of Securities:
	Obligations of U.S. government sponsored enterprises	$	71,979		$	3,485		$	—			$	75,464
	Corporate debt securities		9,071			19,516			—				28,587
	Commercial paper		4,999			—			—				4,999
	Foreign corporate debt securities		1,072			9,877			—				10,949
	Total fixed-maturity securities		87,121			32,878			—				119,999
	Money market funds		11,292			—			—				11,292
	Total	$	98,413		$	32,878		$	—			$	131,291
	The following table shows how the Company’s investments are categorized in accordance with fair value measurement, as of December 31, 2014:
		December 31, 2014
		Level 1			Level 2			Level 3				Total
	Class of Securities:
	Obligations of U.S. government sponsored enterprises	$	3,009		$	3,466		$	—			$	6,475
	Corporate debt securities		14,939			26,545							41,484
	Commercial paper		—			—			—				—
	Foreign corporate debt securities		2,822			9,860			—				12,682
	Total fixed-maturity securities		20,770			39,871			—				60,641
	Money market funds		88,851			—			—				88,851
	Total	$	109,621		$	39,871		$	—			$	149,492
Summary of Transfers between Level 1 and Level 2
		January 1, 2015 to March 31, 2015							January 1, 2014 to December 31, 2014
		Transfers			Transfers					Transfers				Transfers
		from Level 1 to			from Level 2					from Level 1 to				from Level 2
		Level 2			to Level 1					Level 2				to Level 1
	Class of Securities:
	Corporate securities	$	—		$	—				$	—			$	13,941
	Foreign corporate debt securities		—			—					—				1,810
	Total transfers	$	—		$	—				$	—			$	15,751

Capital_Stock_Tables

Capital Stock (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Schedule of Unamortized Value of Restricted Stock	The unamortized value of $0.8 million at March 31, 2015, if all are ultimately vested, would be amortized according to the following schedule.
	Amortization Schedule	March 31, 2015 Unvested $ value
	(in thousands)
	2nd quarter 2015	$	130
	3rd quarter 2015	130
	4th quarter 2015	130
	1st quarter 2016	125
	2nd quarter 2016	92
	3rd quarter 2016	92
	4th quarter 2016	92
	1st quarter 2017	57
	Total unamortized value	$	848
Summary of Company's Restricted Stock Award Activity	A summary of WMIHC’s restricted stock award activity for the three months ended March 31, 2015 and year ended December 31, 2014 is presented below:
		Number of restricted stock awards outstanding			Weighted-average grant date fair value		Aggregate intrinsic value
							(in thousands)
	Outstanding—January 1, 2014		1,842,351		$	0.6787	$	1,250
	Restricted stock awards granted during 2014		500,894		2.6602			1,332
	Restricted stock awards released or forfeited during 2014		—			—		—
	Outstanding—December 31, 2014		2,343,245			1.1023		2,582
	Restricted stock awards granted during 2015		—			—		—
	Restricted stock awards released or forfeited during 2015		—			—		—
	Outstanding—March 31, 2015		2,343,245		$	1.1023	$	2,582
Schedule of Vesting Shares Subject to Repurchase	The shares subject to repurchase at March 31, 2015 will vest according to the following schedule:
	Vesting schedule of shares subject to repurchase	March 31, 2015 Unvested Shares
	2nd quarter 2015		—
	3rd quarter 2015		—
	4th quarter 2015		—
	1st quarter 2016		395,717
	2nd quarter 2016		—
	3rd quarter 2016		—
	4th quarter 2016		—
	1st quarter 2017		166,959
	Total		562,676
Summary of Company's Restricted Shares Issued and Subject to Repurchase	A summary of the Company’s restricted shares issued and subject to repurchase as of the three months ended March 31, 2015 and year ended December 31, 2014 is presented below:
	Vesting schedule of shares subject to repurchase	Unvested Shares
	Shares subject to repurchase—January 1, 2014		1,456,987
	Shares issued subject to vesting during 2014		500,894
	Unvested shares repurchased during 2014		—
	Shares vested during 2014		(614,117	)
	Shares subject to repurchase—December 31, 2014		1,343,764
	Shares issued subject to vesting during 2015		—
	Unvested shares repurchased during 2015		—
	Shares vested during 2015		(781,088	)
	Shares subject to repurchase—March 31, 2015		562,676
	On April 28, 2015, WMIHC issued 269,234 restricted stock grants to members of the Board totaling $0.7 million of aggregate intrinsic value.  The share price was determined based on the closing sales price of $2.60 on the date of the award.
	Contingent on the reincorporation of WMIHC from Washington to Delaware as more fully described in Note 14: Subsequent Events,   and as a condition of voluntarily tendering their resignations from the WMIHC Board of Directors and WMIHC accepting the resignation of Mark E. Holliday and Timothy R. Graham as Directors, all restricted shares held by Mr. Holliday and Mr. Graham issued but unvested on the date of reincorporation will be immediately vested. A total of 190,070 shares, which were previously scheduled to vest over the next three years, would vest early (“Early Vesting”).  Of the Early Vesting shares 113,146 were outstanding as of March 31, 2015 and the balance were issued in conjunction with the annual meeting of shareholders on April 28, 2015 as more fully described in Note 14: Subsequent Events.  This Early Vesting resulted in a one-time charge to compensation and a corresponding increase in additional paid in capital totaling $182 thousand during the three months ended March 31, 2015.

Net_Income_Loss_Per_Common_Sha1

Net Income (Loss) Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Calculation of Basic Net Income (Loss) Per Share	The following table presents the calculation of basic net income (loss) per share for periods presented:
	(in thousands, except per share data):
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Numerator for basic and diluted net income (loss) per share:
	Net income (loss)	$	5,501		$	(3,380	)
	Preferred deemed dividend		—			(9,455	)
	Series B preferred stock dividends		(4,248	)		—
	Net income (loss) attributable to common shareholders	$	1,253		$	(12,835	)
	Denominator for basic net income (loss) per share:
	Weighted-average shares outstanding		202,343,245			201,978,462
	Weighted-average unvested restricted shares outstanding		(1,196,680	)		(1,504,392	)
	Denominator for basic net income (loss) per share:		201,146,565			200,474,070
	Basic net  income (loss) per share attributable to common shareholders	$	0.01		$	(0.06	)
Calculation of Diluted Net Income (Loss) Per Share	The following table presents the calculation of diluted net income (loss) per share for periods presented:
	(in thousands, except per share data):
		Three Months ended March 31, 2015			Three Months ended March 31, 2014
	Numerator for basic and diluted net income (loss) per share:
	Net income (loss)	$	5,501		$	(3,380	)
	Preferred deemed dividend		—			(9,455	)
	Series B preferred stock dividends		(4,248	)		—
	Net income (loss) attributable to common shareholders	$	1,253		$	(12,835	)
	Denominator for diluted net income (loss) per share:
	Weighted-average shares outstanding		202,343,245			201,978,462
	Weighted-average unvested restricted shares outstanding		(1,196,680	)		(1,504,392	)
	Effect of dilutive potential shares *		301,292,296			—
	Denominator for diluted net income (loss) per share:		502,438,861			200,474,070
	Diluted net income (loss) per share attributable to common shareholders	$	0		$	(0.06	)
	*There were no dilutive effects from any equity instruments for periods presented which did not have net income, therefore diluted net income (loss) per share was the same as basic net income (loss) for periods presented which reflect a net loss.

Fair_Value_Measurement_Tables

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Summary of Fair Value Measured on Recurring Basis	The financial instrument that is measured at fair value on a recurring basis is summarized as follows as of March 31, 2015:
	Liabilities	Level 1			Level 2		Level 3		31-Mar-15
	Derivative liability - embedded conversion feature	$	—		$	—	$	58,967	$	58,967
Summary of Change in Level 3 Liability Measured at Fair Value on Recurring Basis	The following table shows the change in Level 3 liability measured at fair value on a recurring basis for the period ended March 31, 2015:
		Derivative liability embedded conversion feature
	Balance, December 31, 2014	$	—
	Issuance during 2015		66,227
	Unrealized gain on change in fair value		(7,260	)
	Balance, March 31, 2015	$	58,967

The_Company_and_its_Subsidiari1

The Company and its Subsidiaries - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Jan. 30, 2014	Jan. 05, 2015
Related Party Transaction [Line Items]
Plan Effective Date	19-Mar-12
Common stock, shares authorized	500,000,000	500,000,000
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$0.00	$0.00
Preferred stock, par value	$0.00	$0.00
Common stock, shares issued	202,343,245	202,343,245
Common stock, shares outstanding	202,343,245	202,343,245
WMMRC [Member]
Related Party Transaction [Line Items]
Number of primary mortgage insurers	7
Series A Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
Preferred stock, shares issued	1,000,000	1,000,000	1,000,000
Preferred stock, shares outstanding	1,000,000	1,000,000
Series B Preferred Stock [Member]
Related Party Transaction [Line Items]
Common stock, par value	$1.75
Preferred stock, par value				$0.00
Preferred stock, shares issued	600,000	0		600,000
Preferred stock, shares outstanding	600,000	0

Significant_Accounting_Policie2

Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended
Share data in Millions, unless otherwise specified	Mar. 31, 2015	Jan. 05, 2015	Feb. 25, 2015	Jan. 30, 2015	Dec. 31, 2014	Feb. 10, 2014	22-May-12	Mar. 19, 2012
Significant Accounting Policies [Line Items]
Unearned premiums	$934,000				$1,094,000
Premium deficiency reserves	2,300,000				2,300,000
Maximum percent of the voting shares of the emerging entity immediately prior to the confirmation of reorganization	50.00%			42.50%				50.00%
Company's reorganization value								76,600,000
Comprehensive income (loss)	0
Common stock reserved for future issuance			12			3	2
Amount of dividends paid on or after Effective Date	0
Preferred stock dividends	700,000
Preferred stock dividend rate	3.00%
Series B Preferred Stock [Member]
Significant Accounting Policies [Line Items]
Preferred stock dividends	$3,500,000
Preferred stock dividend rate		3.00%

Insurance_Activity_Additional_

Insurance Activity - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Aug. 31, 2009
Effects of Reinsurance [Line Items]
Quoted percentage to share base				50.00%
Balances in the fair market reserve	$12,500,000		$12,500,000
Decrease in expense	$0	$0
WMMRC [Member]
Effects of Reinsurance [Line Items]
Second loss layer risk percentage of range minimum				5.00%
Second loss layer risk percentage of range maximum				10.00%
First loss layer risk percentage of range minimum				4.00%
First loss layer risk percentage of range maximum				5.00%
Minimum period of reinsurance agreements	5 years
Maximum period of reinsurance agreements	10 years
WMMRC [Member] | Minimum [Member]
Effects of Reinsurance [Line Items]
Net of ceding commission, percentage				25.00%
WMMRC [Member] | Maximum [Member]
Effects of Reinsurance [Line Items]
Net of ceding commission, percentage				40.00%

Insurance_Activity_Schedule_of

Insurance Activity - Schedule of Premiums Assumed and Earned (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Insurance [Abstract]
Premiums assumed	$1,189	$2,039
Change in unearned premiums	160	127
Premiums earned	$1,349	$2,166

Insurance_Activity_Components_

Insurance Activity - Components of Liability for Losses and Loss Adjustment Reserves (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Effects of Reinsurance [Line Items]
Total losses and loss adjustment reserves	$8,287	$18,947	$44,314
Case-basis reserves [Member]
Effects of Reinsurance [Line Items]
Total losses and loss adjustment reserves	5,888	16,538
IBNR reserves [Member]
Effects of Reinsurance [Line Items]
Total losses and loss adjustment reserves	100	110
Premium deficiency reserves [Member]
Effects of Reinsurance [Line Items]
Total losses and loss adjustment reserves	$2,299	$2,299

Insurance_Activity_Summary_of_

Insurance Activity - Summary of Losses and Loss Adjustment Reserve Activity (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2015
Insurance [Abstract]
Balance at beginning of period	$18,947	$44,314	$8,287
Incurred (released) - prior periods	-541	3,281
Paid - prior periods	-10,119	-28,648
Total losses and loss adjustment reserves	$8,287	$18,947

Investment_Securities_Schedule

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses and Estimated Fair Values of Fixed-Maturity Securities (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total fixed-maturity securities, Amortized Cost	$119,635	$60,202
Total fixed-maturity securities, Gross Unrealized Gains	395	590
Total fixed-maturity securities, Gross Unrealized Losses	-31	-151
Total fixed-maturity securities, Estimated Fair Value	119,999	60,641
Less total unrestricted fixed-maturity securities, Amortized Cost	74,041	7,895
Less total unrestricted fixed-maturity securities, Gross Unrealized Gains	147	179
Less total unrestricted fixed-maturity securities, Gross Unrealized Losses	-5	-11
Less total unrestricted fixed-maturity securities, Estimated Fair Value	74,183	8,063
Total fixed-maturity securities held in trust, Amortized Cost	45,594	52,307
Total fixed-maturity securities held in trust, Gross Unrealized Gains	248	411
Total fixed-maturity securities held in trust, Gross Unrealized Losses	-26	-140
Total fixed-maturity securities held in trust, Estimated Fair Value	45,816	52,578
Obligations of U.S. Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total fixed-maturity securities, Amortized Cost	75,474	6,491
Total fixed-maturity securities, Gross Unrealized Gains	6	12
Total fixed-maturity securities, Gross Unrealized Losses	-16	-28
Total fixed-maturity securities, Estimated Fair Value	75,464	6,475
Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total fixed-maturity securities, Amortized Cost	28,264	41,018
Total fixed-maturity securities, Gross Unrealized Gains	331	531
Total fixed-maturity securities, Gross Unrealized Losses	-8	-65
Total fixed-maturity securities, Estimated Fair Value	28,587	41,484
Foreign Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total fixed-maturity securities, Amortized Cost	10,899	12,693
Total fixed-maturity securities, Gross Unrealized Gains	57	47
Total fixed-maturity securities, Gross Unrealized Losses	-7	-58
Total fixed-maturity securities, Estimated Fair Value	10,949	12,682
Commercial Paper [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total fixed-maturity securities, Amortized Cost	4,998
Total fixed-maturity securities, Gross Unrealized Gains	1
Total fixed-maturity securities, Estimated Fair Value	$4,999

Investment_Securities_Schedule1

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Fixed-Maturity Securities by Contractual Maturity (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Maturity in:
Amortized Cost, 2015	$85,087
Amortized Cost, 2016-2019	34,548
Total fixed-maturity securities, Amortized Cost	119,635	60,202
Estimated Fair Value, 2015	85,122
Estimated Fair Value, 2016-2019	34,877
Total fixed-maturity securities, Estimated Fair Value	$119,999	$60,641

Investment_Securities_Summary_

Investment Securities - Summary of Net Investment Income (Loss) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment income (loss):
Amortization of premium or discount on fixed-maturity securities	($179)	($529)
Investment income on fixed-maturity securities	413	1,102
Interest income on cash and equivalents	57	2
Realized net gain (loss) from sale of investments	186	27
Unrealized (losses) gains on trading securities held at period end	-76	66
Net investment income (loss)	$401	$668

Investment_Securities_Schedule2

Investment Securities - Schedule of Investments in Accordance with Fair Value Measurement (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Class of Securities:
Total fixed-maturity securities	$119,999	$60,641
Total investments fair value	131,291	149,492
Level 1
Class of Securities:
Total fixed-maturity securities	87,121	20,770
Total investments fair value	98,413	109,621
Level 2
Class of Securities:
Total fixed-maturity securities	32,878	39,871
Total investments fair value	32,878	39,871
Obligations of U.S. Government Sponsored Enterprises [Member]
Class of Securities:
Total fixed-maturity securities	75,464	6,475
Obligations of U.S. Government Sponsored Enterprises [Member] | Level 1
Class of Securities:
Total fixed-maturity securities	71,979	3,009
Obligations of U.S. Government Sponsored Enterprises [Member] | Level 2
Class of Securities:
Total fixed-maturity securities	3,485	3,466
Corporate Debt Securities [Member]
Class of Securities:
Total fixed-maturity securities	28,587	41,484
Corporate Debt Securities [Member] | Level 1
Class of Securities:
Total fixed-maturity securities	9,071	14,939
Corporate Debt Securities [Member] | Level 2
Class of Securities:
Total fixed-maturity securities	19,516	26,545
Commercial Paper [Member]
Class of Securities:
Total fixed-maturity securities	4,999
Commercial Paper [Member] | Level 1
Class of Securities:
Total fixed-maturity securities	4,999
Foreign Corporate Debt Securities [Member]
Class of Securities:
Total fixed-maturity securities	10,949	12,682
Foreign Corporate Debt Securities [Member] | Level 1
Class of Securities:
Total fixed-maturity securities	1,072	2,822
Foreign Corporate Debt Securities [Member] | Level 2
Class of Securities:
Total fixed-maturity securities	9,877	9,860
Money Market Funds [Member]
Class of Securities:
Total investments fair value	11,292	88,851
Money Market Funds [Member] | Level 1
Class of Securities:
Total investments fair value	$11,292	$88,851

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value Disclosures [Abstract]
Transfers from Level 2 to Level 1	$0	$15,751

Investment_Securities_Summary_1

Investment Securities - Summary of Transfers between Level 1 and Level 2 (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfers from Level 2 to Level 1	$0	$15,751
Corporate Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfers from Level 2 to Level 1		13,941
Foreign Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfers from Level 2 to Level 1		$1,810

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Jan. 30, 2015	Mar. 19, 2012
Income Tax Disclosure [Abstract]
Net income	$5,501,000	($3,380,000)	$3,070,000
Percentage of net operating loss carry forwards	100.00%
Valuation allowance recorded to be reduce to	0.00%
Income tax expense or benefit			0
Income tax at the federal statutory rate of 35%	35.00%
Income tax paid	0		0
Valuation allowance equal to net deferred federal income tax asset	100.00%		100.00%
Abandoned stock					8,370,000,000
Change in equity ownership	50.00%			42.50%	50.00%
Available and utilizable NOL			6,000,000,000
NOLs expiration date	2031
Reserves for uncertain federal income tax positions	0
Income tax interest income, expense or penalties	$0		$0
Income tax examination, year under examination	2011

Service_Agreements_and_Related1

Service Agreements and Related Party Transactions - Additional Information (Detail) (WMMRC [Member], USD $)	0 Months Ended		3 Months Ended
	Jan. 05, 2015	Oct. 14, 2014	Mar. 31, 2015	Mar. 31, 2014
		Directors
Related Party Transaction [Line Items]
Pro Rata Share of the Common Stock Allotment			10,000,000
Percentage of Pro Rata Share of the Common Stock Election			5.00%
Percentage of interest in Litigation Proceeds			50.00%
Principal amount of Runoff Notes			$1
Lawsuit against number of former directors		16
Litigation settlement amount			$37,000,000
Proceeds from litigation settlement amount	9,000,000
Investment Management Agreement And Administrative Services Agreement [Member]
Related Party Transaction [Line Items]
Expenses incurred under the agreements			400,000	400,000
Investment Management Agreement [Member]
Related Party Transaction [Line Items]
Description of fee			fee equal to the product of (x) the ending dollar amount of assets under management during the calendar month in question and (y) .002 divided by 12.
Administrative Services Agreement [Member]
Related Party Transaction [Line Items]
Administrative services agreement fee			$110,000

Notes_Payable_Additional_Infor

Notes Payable - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Debt Instrument [Line Items]
Collateral Account used for future payments	$3.10	$2.40
Principal and interest payments	3.1	2.4
13% Senior First Lien Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	110
Notes maturity date	19-Mar-30
Principal payments	2.3	78.9
Cash interest paid on Notes	0.1		1.5
13% Senior Second Lien Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	20
Notes maturity date	19-Mar-30
PIK Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	19.4	18.5
Runoff Notes [Member]
Debt Instrument [Line Items]
Outstanding amounts of notes	$29.80	$31.20

Financing_Arrangements_Additio

Financing Arrangements - Additional Information (Detail) (USD $)	Jan. 05, 2015	Jan. 30, 2014	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Loans outstanding	$0
7.50% Subordinated Notes [Member]
Debt Instrument [Line Items]
Principal available		$150,000,000
Debt instrument, interest rate, stated percentage		7.50%
Series B Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred stock, shares issued	600,000		600,000	0
Affiliates of KKR [Member] | Series B Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred stock, shares issued	200,000

Capital_Stock_Additional_Infor

Capital Stock - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended	0 Months Ended	1 Months Ended	0 Months Ended	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Apr. 28, 2015	Jan. 30, 2015	Jan. 05, 2015	Mar. 15, 2015	Mar. 19, 2012	Jan. 30, 2014	Dec. 31, 2013
Capital Stock Distribution [Line Items]
Common stock, shares authorized	500,000,000		500,000,000
Preferred stock, shares authorized	5,000,000		5,000,000
Common stock, par value	$0.00		$0.00
Preferred stock, par value	$0.00		$0.00
Warrants to purchase in aggregate, shares									61,400,000
Convertible preferred stock conversion price	$1.10
Preferred stock liquidation preference per share	$10
Preferred deemed dividend		$9,455,000
Warrants expiration period	5 years
Maximum percent of the voting shares of the emerging entity immediately prior to the confirmation of reorganization	50.00%				42.50%			50.00%
Registration right period	180 days
Preferred stock dividend rate	3.00%
Escrow deposit						598,500,000
Amount of restricted stock grants	0		600,000
Amount of additional restricted stock grants issued			700,000
Award vesting period	3 years
Unamortized value of unvested restricted share grant	848,000		1,200,000
Equity-based compensation	384,000	129,000
Per share of unvested shares of common stock	$0.00
Vested number of shares	190,070
Vested number of shares, outstanding	113,146
Expected increase in additional paid in capital due to early vesting of equity shares	182,000
Expected increase in share based compensation due to early vesting of equity shares	182,000
Common stock, shares outstanding	202,343,245		202,343,245
Warrants to purchase common stock, outstanding	61,400,000		61,400,000
Subsequent Event [Member]
Capital Stock Distribution [Line Items]
Common stock, par value				$0.00
Preferred stock, par value				$0.00
Amount of restricted stock grants				269,234
Amount of additional restricted stock grants issued				700,000
Restricted shares subject to repurchase [Member]
Capital Stock Distribution [Line Items]
Unvested shares	562,676		1,343,764							1,456,987
Series A Convertible Preferred Stock [Member]
Capital Stock Distribution [Line Items]
Preferred stock, shares issued	1,000,000		1,000,000						1,000,000
Purchase price of convertible preferred stock maximum limit									11,100,000
Preferred stock liquidation preference	The Series A Preferred Stock has rights substantially similar to those associated with WMIHCbs common stock, with the exception of a liquidation preference, conversion rights and customary anti-dilution protections. The Series A Preferred Stock has a liquidation preference equal to the greater of (i) $10.00 per one million shares of Series A Preferred Stock plus declared but unpaid dividends on such shares and (ii) the amount that the holder would be entitled to in a relevant transaction had the Series A Preferred Stock been converted to common stock of WMIHC.
Preferred stock, shares outstanding	1,000,000		1,000,000
Convertible Preferred Stock [Member]
Capital Stock Distribution [Line Items]
Expiration of right to participating into future offering					30-Jan-17
Preferred stock participation right					Additionally, until January 30, 2017, the Series A Holders will have the right to purchase up to 50% of any future equity rights offerings or other equity issuance by WMIHC on the same terms as the equity issued to other investors in such transactions, in an aggregate amount of such offerings and issuances by WMIHC of up to $1.0 billion
Convertible Preferred Stock [Member] | Maximum [Member]
Capital Stock Distribution [Line Items]
Maximum percent of the voting shares of the emerging entity immediately prior to the confirmation of reorganization					50.00%
Percentage of rights vest with preferred shareholders to future offering					50.00%
Preferred stock participation value					1,000,000,000
Series B Preferred Stock [Member]
Capital Stock Distribution [Line Items]
Common stock, par value	$1.75
Preferred stock, par value						$0.00
Preferred stock, shares issued	600,000		0			600,000
Preferred stock liquidation preference per share						$1,000
Preferred stock dividend rate						3.00%
Number of trading periods	20 days
Aggregate fair value	59,000,000		0			66,200,000
Changes in Fair Value							$7,200,000
Preferred stock, shares outstanding	600,000		0
Series B Preferred Stock [Member] | Maximum [Member]
Capital Stock Distribution [Line Items]
Common stock, par value	$2.25
Series B Convertible Preferred Stock [Member]
Capital Stock Distribution [Line Items]
Preferred stock, shares outstanding	600,000		0
Common Stock [Member]
Capital Stock Distribution [Line Items]
Issuance of common stock, Shares								200,000,000
Common stock, shares outstanding	202,343,245		202,343,245							201,842,351
Warrant One [Member]
Capital Stock Distribution [Line Items]
Warrants to purchase common stock									30,700,000
Warrants to purchase common stock, exercise price									1.32
Warrant Two [Member]
Capital Stock Distribution [Line Items]
Warrants to purchase common stock									30,700,000
Warrants to purchase common stock, exercise price									1.43

Capital_Stock_Schedule_of_Unam

Capital Stock - Schedule of Unamortized Value of Restricted Stock (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Amortization Expense [Line Items]
Total unamortized value	$848	$1,200
2nd quarter 2015 [Member]
Amortization Expense [Line Items]
Total unamortized value	130
3rd quarter 2015 [Member]
Amortization Expense [Line Items]
Total unamortized value	130
4th quarter 2015 [Member]
Amortization Expense [Line Items]
Total unamortized value	130
1st quarter 2016 [Member]
Amortization Expense [Line Items]
Total unamortized value	125
2nd quarter 2016 [Member]
Amortization Expense [Line Items]
Total unamortized value	92
3rd quarter 2016 [Member]
Amortization Expense [Line Items]
Total unamortized value	92
4th quarter 2016 [Member]
Amortization Expense [Line Items]
Total unamortized value	92
1st quarter 2017 [Member]
Amortization Expense [Line Items]
Total unamortized value	$57

Capital_Stock_Summary_of_Compa

Capital Stock - Summary of Company's Restricted Stock Award Activity (Detail) (Restricted stock award [Member], USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2015
Restricted stock award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Restricted Stock Awards Outstanding, Beginning balance	1,842,351	2,343,245
Number of Restricted Stock Awards Outstanding, Restricted stock awards granted	500,894
Number of Restricted Stock Awards Outstanding, Ending balance	2,343,245	2,343,245
Weighted Average Grant Date Fair Value, Beginning balance	$0.68	$1.10
Weighted Average Grant Date Fair Value, Restricted stock awards granted	$2.66
Weighted Average Grant Date Fair Value, Ending balance	$1.10	$1.10
Aggregate Intrinsic Value, Beginning balance	$1,250	$2,582
Aggregate Intrinsic Value, Restricted stock awards granted	1,332
Aggregate Intrinsic Value, Ending balance	$2,582	$2,582

Capital_Stock_Schedule_of_Vest

Capital Stock - Schedule of Vesting Shares Subject to Repurchase (Detail) (Restricted shares subject to repurchase [Member])	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amortization Expense [Line Items]
Unvested shares	562,676	1,343,764	1,456,987
1st quarter 2016 [Member]
Amortization Expense [Line Items]
Unvested shares	395,717
1st quarter 2017 [Member]
Amortization Expense [Line Items]
Unvested shares	166,959

Capital_Stock_Summary_of_Compa1

Capital Stock - Summary of Company's Restricted Shares Issued and Subject to Repurchase (Detail) (Restricted shares subject to repurchase [Member])	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Restricted shares subject to repurchase [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Restricted Stock Awards Outstanding, Beginning balance	1,343,764	1,456,987
Shares issued subject to vesting during the period		500,894
Shares vested during the period	-781,088	-614,117
Number of Restricted Stock Awards Outstanding, Ending balance	562,676	1,343,764

Pending_Litigation_Additional_

Pending Litigation - Additional Information (Detail)	Mar. 31, 2015
	Litigation
Loss Contingency [Abstract]
Pending legal proceedings or investigations	0

Restriction_on_Distribution_of1

Restriction on Distribution of Net Assets from Subsidiary - Additional Information (Detail) (WMMRC [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
WMMRC [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Total net assets	$53.40	$54.90

Net_Income_Loss_Per_Common_Sha2

Net Income (Loss) Per Common Share - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Earnings Per Share [Abstract]
Dilutive effects from equity instruments	0	0	0

Net_Income_Loss_Per_Common_Sha3

Net Income (Loss) Per Common Share - Calculation of Basic Net Income (Loss) Per Share (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Numerator for basic and diluted net income (loss) per share:
Net income (loss)	$5,501	($3,380)	$3,070
Preferred deemed dividend		-9,455
Series B preferred stock dividends	-4,248
Net income (loss) attributable to common shareholders	$1,253	($12,835)
Denominator for basic net income (loss) per share:
Weighted-average shares outstanding	202,343,245	201,978,462
Weighted-average unvested restricted shares outstanding	-1,196,680	-1,504,392
Denominator for basic net income (loss) per share:	201,146,565	200,474,070
Basic net income (loss) per share attributable to common shareholders	$0.01	($0.06)

Net_Income_Loss_Per_Common_Sha4

Net Income (Loss) Per Common Share - Calculation of Diluted Net Income (Loss) Per Share (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Numerator for basic and diluted net income (loss) per share:
Net income (loss)	$5,501	($3,380)	$3,070
Preferred deemed dividend		-9,455
Series B preferred stock dividends	-4,248
Net income (loss) attributable to common shareholders	$1,253	($12,835)
Denominator for diluted net income (loss) per share:
Weighted-average shares outstanding	202,343,245	201,978,462
Weighted-average unvested restricted shares outstanding	-1,196,680	-1,504,392
Effect of dilutive potential shares	301,292,296
Denominator for diluted net income (loss) per share:	502,438,861	200,474,070
Diluted net income (loss) per share attributable to common shareholders	$0	($0.06)

Net_Income_Loss_Per_Common_Sha5

Net Income (Loss) Per Common Share - Calculation of Diluted Net Income (Loss) Per Share (Parenthetical) (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Earnings Per Share [Abstract]
Dilutive effects from equity instruments	0	0	0

Fair_Value_Measurement_Summary

Fair Value Measurement - Summary of Fair Value Measured on Recurring Basis (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative liability - embedded conversion feature	$58,967
Level 3
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative liability - embedded conversion feature	$58,967

Fair_Value_Measurement_Summary1

Fair Value Measurement - Summary of Change in Level 3 Liability Measured at Fair Value on Recurring Basis (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Issuance during 2015	$66,227
Unrealized gain on change in fair value	-7,260
Balance, March 31, 2015	$58,967

Fair_Value_Measurement_Additio

Fair Value Measurement - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Jan. 05, 2015
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Preferred stock liquidation preference per share	$10
Preferred stock dividend rate	3.00%
Common stock, par value	$0.00		$0.00
Net income (loss)	$5,501,000	($3,380,000)	$3,070,000
Minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Percentage of closing stock price	10.00%
Estimated net income	37,200,000
Maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Percentage of closing stock price	10.00%
Estimated net income	37,100,000
Initial Conversion Price
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Common stock, par value	$2.25
Floor Price
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Common stock, par value	$1.75
Volatility Assumption [Member] | Minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Percentage of closing stock price	10.00%
Estimated net income	11,300,000
Volatility Assumption [Member] | Maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Percentage of closing stock price	10.00%
Estimated net income	11,500,000
Transaction Occurring Assumption [Member] | Minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Percentage of closing stock price	10.00%
Estimated net income	6,600,000
Transaction Occurring Assumption [Member] | Maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Percentage of closing stock price	10.00%
Estimated net income	6,600,000
Series B Preferred Stock [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Capital				$600,000,000
Convertible preferred stock, shares issued	600,000		0	600,000
Preferred stock liquidation preference per share				$1,000
Preferred stock dividend rate				3.00%
Common stock, par value	$1.75
Series B Preferred Stock [Member] | Maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Common stock, par value	$2.25

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	0 Months Ended
	Apr. 28, 2015	Mar. 31, 2015	Dec. 31, 2014	Apr. 15, 2014	Apr. 30, 2015
Subsequent Event [Line Items]
Restricted cash received from WMMRC		$599,588,000	$2,447,000
Notes payable b principal		29,838,000	31,220,000
Common stock, par value		$0.00	$0.00
Preferred stock, par value		$0.00	$0.00
First Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Repayment of notes payable-principal				665,000
Repayment of notes payable-interest				11,000
Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Issued aggregate principal amount		9,000,000
Interest rate		13.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate intrinsic value for restricted shares issued to members by board of directors	700,000
Common stock, par value	$0.00
Preferred stock, par value	$0.00
Subsequent Event [Member] | Minimum [Member]
Subsequent Event [Line Items]
Number of member of board of directors	7
Subsequent Event [Member] | Maximum [Member]
Subsequent Event [Line Items]
Number of member of board of directors	11
Subsequent Event [Member] | Maximum [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Number of shares authorized to issue	3,500,000,000
Subsequent Event [Member] | Maximum [Member] | Preferred Stock [Member]
Subsequent Event [Line Items]
Number of shares authorized to issue	10,000,000
Subsequent Event [Member] | Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Notes payable b principal					29,200,000
WMMRC [Member]
Subsequent Event [Line Items]
Restricted cash received from WMMRC		$3,100,000