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Fair Values of Financial Instruments (Details 5) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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| Financial assets, Carrying value: | ||
| Cash and cash equivalents - Carrying Value | $ 21,963us-gaap_CashEquivalentsAtCarryingValue | $ 19,788us-gaap_CashEquivalentsAtCarryingValue |
| Securities available-for-sale - Carrying Value | 220,053us-gaap_AvailableForSaleSecurities | 195,632us-gaap_AvailableForSaleSecurities |
| Loans held-for-sale - Carrying Value | 2,913us-gaap_LoansHeldForSaleMortgages | 136us-gaap_LoansHeldForSaleMortgages |
| Loans receivable, net - Carrying Value | 481,792us-gaap_LoansAndLeasesReceivableNetReportedAmount | 430,632us-gaap_LoansAndLeasesReceivableNetReportedAmount |
| Federal Home Loan Bank stock - Carrying Value | 3,681us-gaap_FederalHomeLoanBankStock | 3,086us-gaap_FederalHomeLoanBankStock |
| Accrued interest receivable - Carrying Value | 2,727us-gaap_InterestReceivable | 2,480us-gaap_InterestReceivable |
| Financial liabilities, Carrying value: | ||
| Non-interest bearing deposits - Carrying Value | 80,352nwin_DemandAndSavingsDeposits | 73,430nwin_DemandAndSavingsDeposits |
| Interest bearing deposits - Carrying Value | 553,594us-gaap_InterestBearingDepositLiabilities | 499,463us-gaap_InterestBearingDepositLiabilities |
| Repurchase agreements - Carrying Value | 17,525us-gaap_SecuritiesSoldUnderAgreementsToRepurchase | 14,031us-gaap_SecuritiesSoldUnderAgreementsToRepurchase |
| Borrowed funds - Carrying Value | 36,381us-gaap_DebtAndCapitalLeaseObligations | 30,898us-gaap_DebtAndCapitalLeaseObligations |
| Accrued interest payable - Carrying Value | 49us-gaap_InterestPayableCurrentAndNoncurrent | 47us-gaap_InterestPayableCurrentAndNoncurrent |
| Financial assets, Fair value: | ||
| Cash and cash equivalents - Estimated Fair Value | 21,963us-gaap_CashAndCashEquivalentsFairValueDisclosure | 19,788us-gaap_CashAndCashEquivalentsFairValueDisclosure |
| Securities available-for-sale - Estimated Fair Value | 220,053us-gaap_AvailableForSaleSecuritiesDebtSecurities | 195,632us-gaap_AvailableForSaleSecuritiesDebtSecurities |
| Loans held-for-sale - Estimated Fair Value | 2,983us-gaap_LoansHeldForSaleFairValueDisclosure | 138us-gaap_LoansHeldForSaleFairValueDisclosure |
| Loans receivable, net - Estimated Fair Value | 480,736us-gaap_LoansReceivableFairValueDisclosure | 427,719us-gaap_LoansReceivableFairValueDisclosure |
| Federal Home Loan Bank stock - Estimated Fair Value | 3,681us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure | 3,086us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
| Accrued interest receivable - Estimated Fair Value | 2,727nwin_InterestReceivableFairValue | 2,480nwin_InterestReceivableFairValue |
| Financial liabilities, Fair value: | ||
| Non-interest bearing deposits - Estimated Fair Value | 80,352nwin_DemandAndSavingDepositsFairValueDisclosure | 73,430nwin_DemandAndSavingDepositsFairValueDisclosure |
| Interest bearing deposits - Estimated Fair Value | 552,872nwin_CertificatesOfDepositsFairValueDisclosure | 499,470nwin_CertificatesOfDepositsFairValueDisclosure |
| Repurchase agreements - Estimated Fair Value | 17,528us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure | 14,043us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure |
| Borrowed funds - Estimated Fair Value | 36,424us-gaap_LongTermDebtFairValue | 30,956us-gaap_LongTermDebtFairValue |
| Accrued interest payable - Estimated Fair Value | 49nwin_InterestPayableFairValue | 47nwin_InterestPayableFairValue |
| Fair Value, Inputs, Level 1 [Member] | ||
| Financial assets, Fair value: | ||
| Cash and cash equivalents - Estimated Fair Value |
21,963us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
19,788us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Securities available-for-sale - Estimated Fair Value |
6,453us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
1,336us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Loans held-for-sale - Estimated Fair Value |
2,983us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
138us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Loans receivable, net - Estimated Fair Value |
0us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
0us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Federal Home Loan Bank stock - Estimated Fair Value |
0us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
0us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Accrued interest receivable - Estimated Fair Value |
0nwin_InterestReceivableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
0nwin_InterestReceivableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Financial liabilities, Fair value: | ||
| Non-interest bearing deposits - Estimated Fair Value |
80,352nwin_DemandAndSavingDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
73,430nwin_DemandAndSavingDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Interest bearing deposits - Estimated Fair Value |
368,501nwin_CertificatesOfDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
343,847nwin_CertificatesOfDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Repurchase agreements - Estimated Fair Value |
12,010us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
8,042us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Borrowed funds - Estimated Fair Value |
281us-gaap_LongTermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
799us-gaap_LongTermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Accrued interest payable - Estimated Fair Value |
0nwin_InterestPayableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
0nwin_InterestPayableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
| Fair Value, Inputs, Level 2 [Member] | ||
| Financial assets, Fair value: | ||
| Cash and cash equivalents - Estimated Fair Value |
0us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
0us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Securities available-for-sale - Estimated Fair Value |
211,168us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
192,328us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Loans held-for-sale - Estimated Fair Value |
0us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
0us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Loans receivable, net - Estimated Fair Value |
0us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
0us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Federal Home Loan Bank stock - Estimated Fair Value |
3,681us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
3,086us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Accrued interest receivable - Estimated Fair Value |
2,727nwin_InterestReceivableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
2,480nwin_InterestReceivableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Financial liabilities, Fair value: | ||
| Non-interest bearing deposits - Estimated Fair Value |
0nwin_DemandAndSavingDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
0nwin_DemandAndSavingDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Interest bearing deposits - Estimated Fair Value |
184,371nwin_CertificatesOfDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
155,623nwin_CertificatesOfDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Repurchase agreements - Estimated Fair Value |
5,518us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
6,001us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Borrowed funds - Estimated Fair Value |
36,143us-gaap_LongTermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
30,157us-gaap_LongTermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Accrued interest payable - Estimated Fair Value |
49nwin_InterestPayableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
47nwin_InterestPayableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Fair Value, Inputs, Level 3 [Member] | ||
| Financial assets, Fair value: | ||
| Cash and cash equivalents - Estimated Fair Value |
0us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Securities available-for-sale - Estimated Fair Value |
2,432us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
1,968us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Loans held-for-sale - Estimated Fair Value |
0us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Loans receivable, net - Estimated Fair Value |
480,736us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
427,719us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Federal Home Loan Bank stock - Estimated Fair Value |
0us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Accrued interest receivable - Estimated Fair Value |
0nwin_InterestReceivableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0nwin_InterestReceivableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Financial liabilities, Fair value: | ||
| Non-interest bearing deposits - Estimated Fair Value |
0nwin_DemandAndSavingDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0nwin_DemandAndSavingDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Interest bearing deposits - Estimated Fair Value |
0nwin_CertificatesOfDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0nwin_CertificatesOfDepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Repurchase agreements - Estimated Fair Value |
0us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Borrowed funds - Estimated Fair Value |
0us-gaap_LongTermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_LongTermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
| Accrued interest payable - Estimated Fair Value |
$ 0nwin_InterestPayableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
$ 0nwin_InterestPayableFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. This item represents the aggregate of certificates of deposit liabilities held by the entity. No definition available.
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. This item represents the aggregate of deposit liabilities held by the entity, including demand and saving deposits. No definition available.
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- Definition
The amount of money in accounts that may bear interest and that the depositor is entitled to withdraw at any time without prior notice. Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts. No definition available.
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. This item represents the fair value of interest payable at the balance sheet date. No definition available.
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value of interest earned but not received. Also called accrued interest or accrued interest receivable. No definition available.
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- Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The aggregate of all domestic and foreign interest-bearing deposit liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of interest payable on debt, including, but not limited to, trade payables. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. No definition available.
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- Definition
Amount classified as mortgage loans attributable to disposal group held for sale or disposed of. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. No definition available.
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- Definition
Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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