Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements include accounts, after elimination of intercompany accounts and transactions, of Conifer Holdings, Inc. (the “Company” or “Conifer”), its wholly owned subsidiaries, Conifer Insurance Company ("CIC"), White Pine Insurance Company ("WPIC"), Red Cedar Insurance Company ("RCIC"), and Sycamore Insurance Agency, Inc. ("SIA"). CIC, WPIC, and RCIC are collectively referred to as the "Insurance Company Subsidiaries." On a stand-alone basis, Conifer Holdings, Inc. is referred to as the "Parent Company." The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company has applied the rules and regulations of the United States Securities and Exchange Commission (“SEC”) regarding interim financial reporting and therefore the consolidated financial statements do not include all of the information and notes required by GAAP for annual financial statements. In the opinion of management, all adjustments, consisting of items of a normal recurring nature, necessary for a fair presentation of the consolidated interim financial statements, have been included. The results of operations for the nine months ended September 30, 2019, are not necessarily indicative of the results expected for the year ended December 31, 2019. These consolidated financial statements and the notes thereto should be read in conjunction with the Company's audited consolidated financial statements and related notes included in its Annual Report on Form 10-K for the year ended December 31, 2018, as filed with the SEC.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP 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. While management believes the amounts included in the consolidated financial statements reflect management's best estimates and assumptions, actual results may differ from these estimates.
Cash, Cash Equivalents, and Short-term Investments	Cash, Cash Equivalents, and Short-term Investments Cash consists of cash deposits in banks, generally in operating accounts. Cash equivalents consist of money-market funds that are specifically used as overnight investments tied to cash deposit accounts. Short-term investments, consisting of money-market funds, are classified as investments in the consolidated balance sheets as they relate to the Company’s investment activities.
Lease Accounting	Lease Accounting Effective January 1, 2019, the Company adopted FASB Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842), which addresses the financial reporting of leasing transactions. This update required the recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend beyond 12 months. For operating leases, the asset and liability will be amortized over the lease term on a straight-line basis, with all cash flows included in the operating section of the consolidated statement of cash flows. We do not have any financing leases. The Company elected to use the transition option of practical expedients permitted within the new standard, which allows for the adoption of the new standard at the effective date without adjusting the comparative prior periods presented. Our operating leases consist primarily of real estate utilized in the operation of our businesses with lease terms ranging from 5 to 10 years. Management has determined the appropriate discount rate to use in calculating the right-to-use asset and lease liability is 6.75%. The Company recorded a right-of-use asset of $3.9 million and lease liabilities of $3.9 million included in Other Assets and Other Liabilities in the Consolidated Balance Sheet on January 1, 2019.
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326), which amends the current methodology and timing for recognizing credit losses. This amendment will replace the current GAAP "incurred loss" methodology for credit losses with a methodology based on expected credit losses. The new guidance will also require expanded consideration of a broader range of reasonable and increased supportable information for the credit loss estimates. This ASU is effective for annual and interim reporting periods beginning after December 15, 2022. Management is currently evaluating the impact of the guidance. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 840), which modifies the disclosure requirements for assets and liabilities measured at fair value. The requirements to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels and the valuation processes for Level 3 fair value measurements have all been removed. However, the changes in unrealized gains and losses included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period must be disclosed along with the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements (or other quantitative information if it is more reasonable). Finally, for investments measured at net asset value, the requirements have been modified so that the timing of liquidation and the date when restrictions from redemption might lapse are only disclosed if the investee has communicated the timing to the entity or announced the timing publicly. This ASU is effective for annual and interim reporting periods beginning after December 15, 2019. Management is currently evaluating the impact of the guidance. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.
Fair Value Measurements	Level 1 investments consist of equity securities traded in an active exchange market. The Company uses unadjusted quoted prices for identical instruments to measure fair value. Level 1 also includes money market funds and other interest-bearing deposits at banks, which are reported as short-term investments. The fair value measurements that were based on Level 1 inputs comprise 7.1% of the fair value of the total investment portfolio as of September 30, 2019. Level 2 investments include debt securities, which consist of U.S. government agency securities, state and local municipal bonds (including those held as restricted securities), corporate debt securities, mortgage-backed and asset-backed securities. The fair value of securities included in the Level 2 category were based on the market values obtained from a third party pricing service that were evaluated using pricing models that vary by asset class and incorporate available trade, bid and other observable market information. The third party pricing service monitors market indicators, as well as industry and economic events. The fair value measurements that were based on Level 2 inputs comprise 92.5% of the fair value of the total investment portfolio as of September 30, 2019. The Company obtains pricing for each security from independent pricing services, investment managers or consultants to assist in determining fair value for its Level 2 investments. To validate that these quoted prices are reasonable estimates of fair value, the Company performs various quantitative and qualitative procedures, such as (i) evaluation of the underlying methodologies, (ii) analysis of recent sales activity, (iii) analytical review of our fair values against current market prices and (iv) comparison of the pricing services’ fair value to other pricing services’ fair value for the same investment. No markets for the investments were determined to be inactive at period-ends. Based on these procedures, the Company did not adjust the prices or quotes provided from independent pricing services, investment managers or consultants. The Level 2 financial instruments also include the Company's senior debt. The fair value of the borrowings under the senior revolving credit facility approximates its carrying amount because interest is based on a short-term, variable, market-based rate. As of September 30, 2019, Level 3 is entirely comprised of the Company's subordinated debt. In determining the fair value of the subordinated debt outstanding at September 30, 2019, the security attributes (issue date, maturity, coupon, calls, etc.) and market rates on September 24, 2018 (the date of issuance) were fed into a valuation model. A lognormal trinomial interest rate lattice was created within the model to compute the option adjusted spread (“OAS”) which is the amount, in basis points, of interest rate required to be paid under the debt agreement over the risk-free U.S. Treasury rates. The OAS was then fed back into the model along with the September 30, 2019, U.S. Treasury rates. A new lattice was generated and the fair value was computed from the OAS. There were no changes in assumptions of credit risk from the issuance date. The Company’s policy on recognizing transfers between hierarchy levels is applied at the end of each reporting period. There were no transfers between Levels 1, 2 and 3 for the three and nine months ended September 30, 2019 and 2018, respectively. The Company’s financial instruments include assets and liabilities carried at fair value, as well as assets and liabilities carried at cost or amortized cost but disclosed at fair value in these consolidated financial statements. Fair value is defined as the price that would be received for an asset or paid to transfer a liability in the principally most advantageous market for the asset or liability in an orderly transaction between market participants. In determining fair value, the Company applies the market approach, which uses prices and other relevant data based on market transactions involving identical or comparable assets and liabilities. The inputs to valuation techniques used to measure fair value are prioritized into a three-level hierarchy. The hierarchy gives the highest priority to quoted prices from sources independent of the reporting entity (“observable inputs”) and the lowest priority to prices determined by the reporting entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (“unobservable inputs”). The fair value hierarchy is as follows: Level 1—Valuations that are based on quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2—Valuations that are based on observable inputs (other than Level 1 prices) such as quoted prices for similar assets or liabilities at the measurement date; quoted prices in markets that are not active; or other inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability. Level 3—Unobservable inputs that are supported by little or no market activity. The unobservable inputs represent the Company’s best assumption of how market participants would price the assets or liabilities. Net Asset Value (NAV)—The fair values of investment company limited partnership investments are based on the capital account balances reported by the investment funds subject to their management review and adjustment. These capital account balances reflect the fair value of the investment funds.