Note 1 - Basis of Presentation and Accounting Policies	3 Months Ended
Note 1 - Basis of Presentation and Accounting Policies	Mar. 31, 2019
Notes to Financial Statements
Basis of Presentation and Significant Accounting Policies [Text Block]	1. BASIS OF PRESENTATION AND ACCOUNTING POLICIES The unaudited consolidated financial statements include the accounts of MBT Financial Corp. (the “Company”) and its subsidiary, Monroe Bank & Trust (the “Bank”). The Bank includes the accounts of its wholly owned subsidiary, MB&T Financial Services, Inc. The Bank operates fourteen branches in Monroe County, Michigan, six branches in Wayne County, Michigan, and one loan and wealth management office in Wayne County. The Bank’s primary source of revenue is from providing loans to customers, who are predominantly small and middle-market businesses and middle-income individuals. The Company’s sole business segment is community banking. On October 9, 2018, the Company and First Merchants Corporation (“First Merchants”) signed an Agreement and Plan of Reorganization and Merger (the “Merger Agreement”), pursuant to which the Company will merge with and into First Merchants. Subject to the terms and conditions of the Merger Agreement, each share of the Company will be converted into 0.275 shares of First Merchants common stock. The merger was approved at a special meeting of the Company’s shareholders on February 14, 2019 and the transaction is expected to be completed in the second quarter of 2019. The accounting and reporting policies of the Bank conform to practice within the banking industry and are in accordance with accounting principles generally accepted in the United States. Preparation of financial statements in conformity with generally accepted accounting principles requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes in the near term are the determination of the allowance for loan losses and the fair value of investment securities. The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with the instructions to Form 10 -Q. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. However, such information reflects all adjustments (consisting of normal recurring adjustments), which are, in the opinion of Management, necessary for fair statement of results for the interim periods. The significant accounting policies are as follows: PRINCIPLES OF CONSOLIDATION The consolidated financial statements include the accounts of the Company and its subsidiary. All material intercompany transactions and balances have been eliminated. COMPREHENSIVE INCOME Accounting principles generally require that revenue, expenses, gains, and losses be included in net income. Certain changes in assets and liabilities, however, such as unrealized gains and losses on securities available for sale and amounts recognized related to postretirement benefit plans (gains and losses, prior service costs, and transition assets or obligations), are reported as a direct adjustment to the equity section of the balance sheet. Such items, along with net income, are components of comprehensive income. BUSINESS SEGMENTS While the Company's chief decision makers monitor the revenue streams of various products and services, operations are managed and financial performance is evaluated on a company wide basis. Accordingly, all of the Company’s operations are considered by management to be aggregated in one reportable segment. FAIR VALUE The Company measures or monitors many of its assets and liabilities on a fair value basis. Fair value is used on a recurring basis for assets and liabilities that are elected to be accounted for under The Fair Value Option as well as for certain assets and liabilities in which fair value is the primary basis of accounting. Examples of these include derivative instruments and available for sale securities. Additionally, fair value is used on a non-recurring basis to evaluate assets or liabilities for impairment or for disclosure purposes. Examples of these non-recurring uses of fair value include certain loans held for sale accounted for on a lower of cost or market basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, the Company uses various valuation techniques and assumptions when estimating fair value. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at and/or marked to fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability. When possible, the Company looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to market observable data for similar assets or liabilities. Nevertheless, certain assets and liabilities are not actively traded in observable markets and the Company must use alternative valuation techniques to derive a fair value measurement. ACCOUNTING PRONOUNCEMENTS In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016 - 13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments. The ASU includes increased disclosures and various changes to the accounting and measurement of financial assets including the Company’s loans and available-for-sale and held-to-maturity debt securities. Each financial asset presented on the balance sheet would have a unique allowance for credit losses valuation account that is deducted from the amortized cost basis to present the net carrying value at the amount expected to be collected on the financial asset. The amendments in this ASU also eliminate the probable initial recognition threshold in current GAAP and instead, reflect an entity’s current estimate of all expected credit losses using reasonable and supportable forecasts. The new credit loss guidance will be effective for the Company's year ending December 31, 2020. Upon adoption, the ASU will be applied using a modified retrospective transition method to the beginning of the first reporting period in which the guidance is effective. A prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the effective date. Early adoption for all institutions is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The standard will likely have an effect on the Company's consolidated financial statements from a onetime adjustment to increase the ALLL upon adoption of the standard and due to increased provision expense at the time loans are originated. Management has developed an implementation timeline and begun the process of segmenting the portfolio. In March 2017, the FASB issued ASU No. 2017 - 08, Receivables-Nonrefundable Fees and Other Costs – Premium Amortization on Purchased Callable Debt Securities (Subtopic 310 - 20 ). This ASU was issued to shorten the amortization period for the premium to the earliest call date on debt securities. This premium will now be recorded as a reduction to net interest margin during the shorter yield to call period, as compared to prior practice of amortizing the premium as a reduction to net interest margin over the contractual life of the instrument. This ASU does not change the current method of amortizing any discount over the contractual life of the debt security, and this pronouncement is effective for fiscal years beginning after December 15, 2018, and must be adopted on a modified retrospective basis. Adoption of the standard did not have a material effect on the Company’s financial statements.

MBT FINANCIAL CORP 10-Q