Summary of Significant Accounting Policies (Details Textual) (USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Business Acquisition [Line Items] | ||
Goodwill | $ 1,611,000us-gaap_Goodwill | $ 0us-gaap_Goodwill |
Loans Receivable, Fair Value Disclosure | 480,736,000us-gaap_LoansReceivableFairValueDisclosure | 427,719,000us-gaap_LoansReceivableFairValueDisclosure |
Amortization of Intangible Assets | 9,000us-gaap_AmortizationOfIntangibleAssets | |
First Federal Acquisition [Member] | ||
Business Acquisition [Line Items] | ||
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |
39,600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities |
3,800,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Business Combination, Acquired Receivables, Fair Value |
29,100,000us-gaap_BusinessCombinationAcquiredReceivablesFairValue / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |
967,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land |
690,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |
37,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Goodwill |
1,600,000us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Finite-lived Intangible Assets Acquired |
93,000us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember |
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Federal Reserve Bank [Member] | ||
Business Acquisition [Line Items] | ||
Cash |
827,000us-gaap_Cash / nwin_BankingAxis = nwin_FederalReserveBankMember |
656,000us-gaap_Cash / nwin_BankingAxis = nwin_FederalReserveBankMember |
Premises And Equipment [Member] | Minimum [Member] | ||
Business Acquisition [Line Items] | ||
Property, Plant and Equipment, Useful Life | 26 years | |
Premises And Equipment [Member] | Maximum [Member] | ||
Business Acquisition [Line Items] | ||
Property, Plant and Equipment, Useful Life | 39 years | |
Furniture and Equipment [Member] | Minimum [Member] | ||
Business Acquisition [Line Items] | ||
Property, Plant and Equipment, Useful Life | 2 years | |
Furniture and Equipment [Member] | Maximum [Member] | ||
Business Acquisition [Line Items] | ||
Property, Plant and Equipment, Useful Life | 10 years | |
Core Deposits [Member] | ||
Business Acquisition [Line Items] | ||
Finite-Lived Intangible Asset, Useful Life | 7 years 10 months 24 days | |
Finite-Lived Intangible Assets, Amortization Method | straight line basis | |
Core Deposits [Member] | First Federal Acquisition [Member] | ||
Business Acquisition [Line Items] | ||
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |
7,200,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CoreDepositsMember |
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Certificates of Deposit [Member] | ||
Business Acquisition [Line Items] | ||
Finite-Lived Intangible Asset, Useful Life | 17 months | |
Amortization of Intangible Assets |
126,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
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Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months |
150,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
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Deposits, Fair Value Disclosure |
276,000us-gaap_DepositsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
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Finite-Lived Intangible Assets, Amortization Method | straight line basis | |
Certificates of Deposit [Member] | First Federal Acquisition [Member] | ||
Business Acquisition [Line Items] | ||
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |
29,800,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = nwin_FirstFederalAcquisitionMember / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember |
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Home Equity Line of Credit [Member] | ||
Business Acquisition [Line Items] | ||
Loans Receivable, Fair Value Disclosure |
1,100,000us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember |
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Finite-Lived Intangible Asset, Useful Life | 55 months | |
Finite-Lived Intangible Assets, Amortization Method | straight line basis | |
Home Equity Line of Credit [Member] | Loans Receivable [Member] | ||
Business Acquisition [Line Items] | ||
Amortization of Intangible Assets |
318,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember |
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Finite-Lived Intangible Assets, Amortization Expense, Year Three |
206,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember |
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Finite-Lived Intangible Assets, Amortization Expense, Year Four |
$ 171,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember |
X | ||||||||||
- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the fair value of the receivables acquired, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of assets acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of real estate acquired, at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of liabilities assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of property, plant, and equipment recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount 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. 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
Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits. No definition available.
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- Definition
Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. No definition available.
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- Definition
Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amortization method of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. The straight-line method is the preferred amortization method, unless another method better reflects the pattern in which the asset is consumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. 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
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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