XML 37 R35.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investment Securities - Schedule of Investments in Accordance with Fair Value Measurement (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Class of Security: |  |
Total fixed maturity securities | $ 216,480 | $ 218,801
Total investments fair value | 258,499 | 263,664
Obligations of U.S. Government Sponsored Enterprises [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 8,497 | 15,832
Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 90,731 | 81,892
Commercial Paper [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 96,115 | 98,932
Foreign Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 21,137 | 22,145
Money Market Funds [Member] |  |
Class of Security: |  |
Total investments fair value | 42,019 | 44,863
Level 1 [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 135,812 | 124,774
Total investments fair value | 177,831 | 169,637
Level 1 [Member] | Obligations of U.S. Government Sponsored Enterprises [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 3,042 | 6,299
Level 1 [Member] | Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 29,813 | 11,891
Level 1 [Member] | Commercial Paper [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 96,115 | 98,932
Level 1 [Member] | Foreign Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 6,842 | 7,652
Level 1 [Member] | Money Market Funds [Member] |  |
Class of Security: |  |
Total investments fair value | 42,019 | 44,863
Level 2 [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 80,668 | 94,027
Total investments fair value | 80,668 | 94,027
Level 2 [Member] | Obligations of U.S. Government Sponsored Enterprises [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 5,455 | 9,533
Level 2 [Member] | Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 60,918 | 70,001
Level 2 [Member] | Commercial Paper [Member] |  |
Class of Security: |  |
Total fixed maturity securities |  |
Level 2 [Member] | Foreign Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities | 14,295 | 14,493
Level 2 [Member] | Money Market Funds [Member] |  |
Class of Security: |  |
Total investments fair value |  |
Level 3 [Member] |  |
Class of Security: |  |
Total fixed maturity securities |  |
Total investments fair value |  |
Level 3 [Member] | Obligations of U.S. Government Sponsored Enterprises [Member] |  |
Class of Security: |  |
Total fixed maturity securities |  |
Level 3 [Member] | Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities |  |
Level 3 [Member] | Commercial Paper [Member] |  |
Class of Security: |  |
Total fixed maturity securities |  |
Level 3 [Member] | Foreign Corporate Debt Securities [Member] |  |
Class of Security: |  |
Total fixed maturity securities |  |
Level 3 [Member] | Money Market Funds [Member] |  |
Class of Security: |  |
Total investments fair value |  |

X
- Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities estimated fair value. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesEstimatedFairValue
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant