XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Fair Value (Details 1) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) Number | Mar. 31, 2016 USD ($)
Other-than-temporary impairment model assumptions: |  |  |
Other-than-temporary impairment | $ |  | $ 271 | $ 271
Cusip One [Member] |  |  |
Fair Value Pooled Trust Preferred Securities [Line Items] |  |  |
Cusip |  | 74043CAC1 |
Deal name |  | PreTSL XXIV |
Class |  | B-1 |
Lowest credit rating assigned |  | CC |
Number of performing banks |  | 57 |
Number of performing insurance companies |  | 13 |
Number of issuers in default |  | 19 |
Number of issuers in deferral |  | 4 |
Defaults & deferrals as a % of performing collateral |  | 36.46% |
Subordination: |  |  |
As a % of performing collateral |  | 9.51% |
As a % of performing collateral - adjusted for projected future defaults |  | 4.35% |
Other-than-temporary impairment model assumptions: |  |  |
Year 1 - issuer average |  | 1.80% |
Year 2 - issuer average |  | 1.80% |
Year 3 - issuer average |  | 1.80% |
> 3 Years - issuer average | [1] |  |
Discount rate - 3 month Libor, plus implicit yield spread at purchase |  | 1.48% |
Recovery assumptions | [2] |  |
Prepayments |  | 0.00% |
Other-than-temporary impairment | $ |  | $ 41 |
Cusip Two [Member] |  |  |
Fair Value Pooled Trust Preferred Securities [Line Items] |  |  |
Cusip |  | 74042TAJ0 |
Deal name |  | PreTSL XXVII |
Class |  | C-1 |
Lowest credit rating assigned |  | C |
Number of performing banks |  | 30 |
Number of performing insurance companies |  | 7 |
Number of issuers in default |  | 8 |
Number of issuers in deferral |  | 4 |
Defaults & deferrals as a % of performing collateral |  | 27.32% |
Subordination: |  |  |
As a % of performing collateral |  | (3.69%) |
As a % of performing collateral - adjusted for projected future defaults |  | (11.38%) |
Other-than-temporary impairment model assumptions: |  |  |
Year 1 - issuer average |  | 2.30% |
Year 2 - issuer average |  | 2.30% |
Year 3 - issuer average |  | 2.30% |
> 3 Years - issuer average | [1] |  |
Discount rate - 3 month Libor, plus implicit yield spread at purchase |  | 1.23% |
Recovery assumptions | [2] |  |
Prepayments |  | 0.00% |
Other-than-temporary impairment | $ |  | $ 132 |
Cusip Three [Member] |  |  |
Fair Value Pooled Trust Preferred Securities [Line Items] |  |  |
Cusip |  | 01449TAB9 |
Deal name |  | Alesco IX |
Class |  | A-2A |
Lowest credit rating assigned |  | BB |
Number of performing banks |  | 59 |
Number of performing insurance companies |  | 10 |
Number of issuers in default |  | 2 |
Number of issuers in deferral |  | 5 |
Defaults & deferrals as a % of performing collateral |  | 7.23% |
Subordination: |  |  |
As a % of performing collateral |  | 46.16% |
As a % of performing collateral - adjusted for projected future defaults |  | 43.09% |
Other-than-temporary impairment model assumptions: |  |  |
Year 1 - issuer average |  | 1.80% |
Year 2 - issuer average |  | 1.80% |
Year 3 - issuer average |  | 1.80% |
> 3 Years - issuer average | [1] |  |
Discount rate - 3 month Libor, plus implicit yield spread at purchase |  | 1.27% |
Recovery assumptions | [2] |  |
Prepayments |  | 0.00% |
Other-than-temporary impairment | $ |  | $ 36 |
Cusip Four [Member] |  |  |
Fair Value Pooled Trust Preferred Securities [Line Items] |  |  |
Cusip |  | 01450NAC6 |
Deal name |  | Alesco XVII |
Class |  | B |
Lowest credit rating assigned |  | CCC |
Number of performing banks |  | 48 |
Number of issuers in default |  | 4 |
Number of issuers in deferral |  | 4 |
Defaults & deferrals as a % of performing collateral |  | 16.96% |
Subordination: |  |  |
As a % of performing collateral |  | 25.85% |
As a % of performing collateral - adjusted for projected future defaults |  | 21.62% |
Other-than-temporary impairment model assumptions: |  |  |
Year 1 - issuer average |  | 1.80% |
Year 2 - issuer average |  | 1.80% |
Year 3 - issuer average |  | 1.80% |
> 3 Years - issuer average | [1] |  |
Discount rate - 3 month Libor, plus implicit yield spread at purchase |  | 1.44% |
Recovery assumptions | [2] |  |
Prepayments |  | 0.00% |
Other-than-temporary impairment | $ |  | $ 62 |
[1] | Default rates > 3 years are evaluated on a issuer by issuer basis and range from 0.25% to 5.00%.
[2] | Recovery assumptions are evaluated on a issuer by issuer basis and range from 0% to 15% with a five year lag.

X
- Definition The nine-character unique securities identifier assigned to the instrument. + References No definition available. + Details
Name: | nwin_CommitteeForUniformSecuritiesIdentificationProceduresCusip1
Namespace Prefix: | nwin_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of issuers in default under collateralized debt obligation. + References No definition available. + Details
Name: | nwin_NumberOfIssuersInDefaultUnderCollateralizedDebtObligations
Namespace Prefix: | nwin_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of issuers in deferral under collateralized debt obligation. + References No definition available. + Details
Name: | nwin_NumberOfIssuersInDeferralUnderCollateralizedDebtObligations
Namespace Prefix: | nwin_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of performing banks under collateralized debt obligation. + References No definition available. + Details
Name: | nwin_NumberOfPerformingBanksUnderCollateralizedDebtObligations
Namespace Prefix: | nwin_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of performing insurance companies under collateralized debt obligation. + References No definition available. + Details
Name: | nwin_NumberOfPerformingInsuranceCompaniesUnderCollateralizedDebtObligations
Namespace Prefix: | nwin_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Percentage of default and deferral on performing collateral. + References No definition available. + Details
Name: | nwin_PercentageOfDefaultsAndDeferralsOnPerformingCollateral
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of defaults rates on above 3 years issuer average in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfDefaultsRatesOnAbove3YearsIssuerAverageInOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of defaults rates on year 1 issuer average in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfDefaultsRatesOnYear1IssuerAverageInOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of defaults rates on year 2 issuer average in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfDefaultsRatesOnYear2IssuerAverageInOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of defaults rates on year 3 issuer average in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfDefaultsRatesOnYear3IssuerAverageInOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of discount rate on 3 month LIBOR plus implicit yield spread in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfDiscountRateOn3MonthLiborPlusImplicitYieldSpread
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of prepayments in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfPrepaymentsOnOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of recovery assumptions in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_PercentageOfRecoveryAssumptionsOnOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of subordination on performing collateral. + References No definition available. + Details
Name: | nwin_PercentageOfSubordinationOnPerformingCollateral
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of subordination on performing collateral adjusted for projected future defaults. + References No definition available. + Details
Name: | nwin_PercentageOfSubordinationOnPerformingCollateralAdjustedForProjectedFutureDefaults
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Class of trust preferred securities. + References No definition available. + Details
Name: | nwin_TrustPreferredSecuritiesClass
Namespace Prefix: | nwin_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deal name of trust preferred securities. + References No definition available. + Details
Name: | nwin_TrustPreferredSecuritiesDealName
Namespace Prefix: | nwin_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the credit rating indicative of likelihood of repayment of the debt instrument given by a credit rating agency (for example, Standard and Poor's, Moody's, Fitch). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
Name: | us-gaap_DebtInstrumentCreditRating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | nwin_CusipAxis=nwin_CusipOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nwin_CusipAxis=nwin_CusipTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nwin_CusipAxis=nwin_CusipThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nwin_CusipAxis=nwin_CusipFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |