| **Note 1 – Basis of Presentation**                              | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           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| Basis of Presentation and Significant Accounting Policies [Text Block] | **Note 1 – Basis of Presentation**

**General**

        In the opinion of management, the accompanying unaudited        consolidated financial statements contain all adjustments        necessary to present fairly Mid-Wisconsin Financial        Services, Inc.’s (the “Company”) and        Mid-Wisconsin Bank’s, its wholly owned banking        subsidiary (the “Bank”), consolidated balance        sheets, results of operations, comprehensive income,        changes in stockholders’ equity and cash flows for the        periods presented, and all such adjustments are of a normal        recurring nature.  The consolidated balance sheets        include the accounts of all subsidiaries.  All        material intercompany transactions and balances are        eliminated.  The results of operations for the interim        periods are not necessarily indicative of the results to be        expected for the entire year. We have reviewed and        evaluated subsequent events through the date this Form 10-Q        was filed.      

        These interim consolidated financial statements have been        prepared according to the rules and regulations of the        Securities and Exchange Commission and, therefore, certain        information and footnote disclosures normally presented in        accordance with generally accepted accounting principles in        the United States of America (“U.S. GAAP”) have        been omitted or abbreviated.  The information        contained in the consolidated financial statements and        footnotes in our Annual Report on Form 10-K for the year        ended December 31, 2011 (the “2011 Form 10-K”)        should be referred to in connection with the reading of        these unaudited interim financial statements.      

        Preparation of financial statements in conformity with U.S.        GAAP accounting principles generally accepted requires        management to make estimates and assumptions that affect        the amounts reported in the consolidated financial        statements and accompanying disclosures. These estimates        are based on management’s best knowledge of current        events and actions the Company may undertake in the future.        Estimates are used in accounting for, among other items,        fair value of financial instruments, the allowance for loan        losses, useful lives for depreciation and amortization,        deferred tax assets, uncertain income tax positions and        contingencies. Management does not anticipate any material        changes to estimates in the near term. Factors that may        cause sensitivity to the aforementioned estimates include        but are not limited to:  external market factors such        as market interest rates and employment rates, changes to        operating policies and procedures, and changes in        applicable banking regulations. Actual results may        ultimately differ from estimates, although management does        not generally believe such differences would materially        affect the consolidated financial statements in any        individual reporting period.      

**Recent Accounting Pronouncements  **

        In April 2011, the FASB issued clarifying guidance        regarding which loan modifications constitute troubled debt        restructurings.  In evaluating whether a restructuring        constitutes a troubled debt restructuring, the guidance        maintains a creditor must separately conclude that the        restructuring constitutes a concession and the debtor is        experiencing financial difficulties.  The accounting        standard provides further guidance with respect to whether        a creditor has granted a concession and whether a debtor is        experiencing financial difficulties.  The measurement        guidance is effective for interim and annual periods        beginning on or after June 15, 2011, while the disclosure        guidance is effective for interim and annual periods        beginning on or after June 15, 2011 with retrospective        application to restructurings occurring on or after the        beginning of the fiscal year.  The Company adopted the        accounting standard as of the beginning of the third        quarter of 2011, as required, with no material impact on        its results of operations, financial position, and        liquidity.      

        In April 2011, the FASB issued an accounting standard that        modifies the criteria for determining when repurchase        agreements would be accounted for as a secured borrowing        rather than as a sale.  Currently, an entity that        maintains effective control over transferred financial        assets must account for the transfer as a secured borrowing        rather than as a sale.  The provisions remove from the        assessment of effective control the criterion requiring the        transferor to have the ability to repurchase or redeem the        financial assets on substantially the agreed terms, even in        the event of default by the transferee.  The FASB        believes that contractual rights and obligations determine        effective control and that there does not need to be a        requirement to assess the ability to exercise those        rights.  The accounting standard does not change the        other existing criteria used in the assessment of effective        control and is effective prospectively for transactions, or        modifications of existing transactions, that occur on or        after January 1, 2012.  As the Company accounts for        all of its repurchase agreements as collateralized        financing arrangements, the adoption of this accounting        standard had no material impact on the consolidated        financial statements of the Company.      

        In May 2011, the FASB issued an accounting standard that        provides a consistent definition of fair value and common        requirements for measurement of and disclosure about fair        value between U.S. GAAP and International Financial        Reporting Standards (“IFRS”).  The changes        to U.S. GAAP as a result of the accounting standard are as        follows:  (i) the concepts of highest and best use and        valuation premise are only relevant when measuring the fair        value of nonfinancial assets (that is, it does not apply to        financial assets or any liabilities); (ii) U.S. GAAP        currently prohibits application of a blockage factor in        valuing financial instruments with quoted prices in active        markets, while the new accounting standard extends that        prohibition to all fair value measurements; (iii) an        exception is provided to the basic fair value measurement        principles for an entity that holds a group of financial        assets and financial liabilities with offsetting positions        in market risks or counterparty credit risk that are        managed on the basis of the entity’s net exposure to        either of those risks, which such exception allows the        entity, if certain criteria are met, to measure the fair        value of the net asset or liability position in a manner        consistent with how market participants would price the net        risk position; (iv) the fair value measurement of        instruments classified within an entity’s        shareholders’ equity have been aligned with the        guidance for liabilities; and (v) disclosure requirements        have been enhanced for recurring Level 3 fair value        measurements to disclose quantitative information about        unobservable inputs and assumptions used, to describe the        valuation processes used by the entity, and to describe the        sensitivity of fair value measurements to changes in        unobservable inputs and interrelationships between those        inputs.  In addition, entities must report the level        in the fair value hierarchy of items that are not measured        at fair value in the statement of condition but whose fair        value must be disclosed. These new disclosures were        adopted during the quarter ended March 31, 2012 and did not        have a material impact on the consolidated financial        statements of the Company.      

         In June 2011, the FASB issued an accounting standard        that allows an entity the option to present the total of        comprehensive income, the components of net income, and the        components of other comprehensive income either in a single        continuous statement of comprehensive income or in two        separate but consecutive statements.  In both choices,        an entity is required to present each component of net        income along with total net income, each component of other        comprehensive income along with a total for other        comprehensive income, and a total amount for comprehensive        income.  The statement(s) are required to be presented        with equal prominence as the other primary financial        statements.  The accounting pronouncement eliminates        the option to present the components of other comprehensive        income as part of the statement of changes in        shareholders’ equity but does not change the items        that must be reported in other comprehensive income or when        an item of other comprehensive income must be reclassified        to net income.  The Company has adopted this standard        effective March 31, 2012, electing to present a        consolidated statement of comprehensive income separate        from, but consecutive to, its statement of operations.      

        In July 2010, the FASB issued new accounting guidance        requiring extensive new disclosures surrounding the        allowance for loan losses although it did not change any        credit loss recognition or measurement rules.  The new        rules require disclosure to include a breakdown of        allowance for loan loss activity by portfolio segment as        well as problem loan disclosures by detailed class of        loan.  In addition, disclosures on internal credit        grading metrics and information on impaired, non-accrual,        and restructured loans are also required.  The        period-end disclosures were effective for financial periods        ending December 31, 2010 but deferred presentation of loan        loss allowance by loan portfolio segment until the quarter        ended March 31, 2011.  The Company adopted the rules        for loan loss allowance disclosures by loan segment        effective March 31, 2011. |

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| - Definition
The entire disclosure for the basis of presentation, or accounting, and significant accounting policies.
+ References
No definition available.
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