XML 45 R34.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Fixed-Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Investments Debt And Equity Securities [Abstract] |  |
Amortized Cost, 2017 | $ 30,994 |
Amortized Cost, 2018 | 15,319 |
Amortized Cost, 2019 | 3,026 |
Total fixed-maturity securities, Amortized Cost | 49,339 | $ 76,912
Estimated Fair Value, 2017 | 30,991 |
Estimated Fair Value, 2018 | 15,281 |
Estimated Fair Value, 2019 | 3,008 |
Total fixed-maturity securities, Estimated Fair Value | $ 49,280 | $ 76,831

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investments in debt securities classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26626-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: 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=66010992&loc=d3e26610-111562 + Details
Name: | us-gaap_TradingSecuritiesDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of investments in debt securities classified as trading. + References No definition available. + Details
Name: | us-gaap_TradingSecuritiesDebtAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities debt maturities in year three amortized cost. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesDebtMaturitiesInYearThreeAmortizedCost
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities debt maturities in year three fair value. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesDebtMaturitiesInYearThreeFairValue
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities debt maturities in year two amortized cost. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesDebtMaturitiesInYearTwoAmortizedCost
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities debt maturities in year two fair value. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesDebtMaturitiesInYearTwoFairValue
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities debt maturities within one year amortized cost. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesDebtMaturitiesWithinOneYearAmortizedCost
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed maturity securities debt maturities within one year fair value. + References No definition available. + Details
Name: | wmih_FixedMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant