XML 17 R50.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fair Value (Details Textuals) (USD $) | 3 Months Ended |
--- | --- | ---
Jun. 30, 2012 | Dec. 31, 2011
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 | $ 3,900,000 |
Unpaid Principal Balance | 20,300,000 | 21,700,000
Impaired Financing Receivable, Reserve | 1,300,000 | 1,600,000
Impaired Financing Receivable, Fair Value | 19,000,000 | 20,100,000
Other Than Temporary Impairment Additional | $ 6,000 |

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 element represents the amount of addtional other than temporary impairment. + References No definition available. + Details
Name: | nwin_OtherThanTemporaryImpairmentAdditional
Namespace Prefix: | nwin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without 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=7512638&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant