XML 62 R52.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Fair Value (Details Textual) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value [Line Items] |  |
Minimum Percentage of Defaults Rates on Above 3 Years Issuer Average in Other than Temporary Impairment Model Assumptions |  | 0.25%
Maximum Percentage of Defaults Rates on Above 3 Years Issuer Average in Other than Temporary Impairment Model Assumptions |  | 5.00%
Minimum Percentage of Recovery Assumptions on Other than Temporary Impairment Model Assumptions |  | 0.00%
Maximum Percentage of Recovery Assumptions on Other than Temporary Impairment Model Assumptions |  | 15.00%
Available-for-sale Securities, Amortized Cost Basis | $ 3,800 |
Unpaid Principal Balance | 4,200 | $ 7,400
Impaired Financing Receivable, Reserve | 352 | 356
Impaired Financing Receivable, Fair Value | $ 3,800 | $ 7,000

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

X
- Definition The fair value of investment related to impaired financing receivables. + References No definition available. + Details
Name: | nwin_ImpairedFinancingReceivableFairValue
Namespace Prefix: | nwin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of reserve related to impaired financing receivable. + References No definition available. + Details
Name: | nwin_ImpairedFinancingReceivableReserve
Namespace Prefix: | nwin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum range percentage of defaults rates on above 3 years issuer average in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_MaximumPercentageOfDefaultsRatesOnAbove3YearsIssuerAverageInOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Minimum range percentage of defaults rates on above 3 years issuer average in other than temporary impairment model assumptions. + References No definition available. + Details
Name: | nwin_MinimumPercentageOfDefaultsRatesOnAbove3YearsIssuerAverageInOtherThanTemporaryImpairmentModelAssumptions
Namespace Prefix: | nwin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant