Document and Entity Information Document Information [Table] Document Information [Line Items] Document and Entity Information Document Type Document Annual Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Documents Incorporated by Reference [Text Block] Documents Incorporated by Reference Entity Central Index Key Current Fiscal Year End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Auditor Name Auditor Firm ID Auditor Location Consolidated Balance Sheets Assets [Abstract] Assets: ASSETS: Cash and Due from Banks Cash and due from banks Interest-Bearing Deposits in Banks and Other Financial Institutions Interest-bearing deposits with banks Federal Funds Sold Federal funds sold Cash and Cash Equivalent Total cash and cash equivalents Cash Debt Securities, Available-for-Sale, Excluding Accrued Interest Securities available-for-sale, at fair value Total, post ASU 2019-04 Fair Value Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Securities held-to-maturity (fair value of $109.4 million at Dec. 31, 2025 and $108.1 million at Dec. 31, 2024) Amortized cost Investment Owned, Restricted, Cost Other investments Loans held for sale. Loans Held For Sale Loans held for sale Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Loans and leases Total loans and leases Total loans Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Less: Allowance for credit losses Ending balance Beginning balance Allowance for credit losses Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Loans and leases, net Property, Plant and Equipment, Net Total, net Premises and equipment, net Repossessed Assets Other real estate owned Intangible Assets, Net (Including Goodwill) Goodwill and other intangibles, net Cash Surrender Value of Life Insurance Bank owned life insurance Other Assets Other assets Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY: LIABILITIES AND SHAREHOLDERS' EQUITY: Deposits [Abstract] Deposits: Noninterest-Bearing Deposit Liabilities Noninterest-bearing demand deposits Noninterest-bearing demand Demand Deposit Accounts Interest-bearing demand deposits Interest-bearing demand Deposits, Savings Deposits Money market and savings Time Deposits Time deposits Time deposits Deposits Total deposits Secured Debt Borrowings Subordinated Debt Subordinated debt Other Liabilities Other liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingent liabilities - see Note 14 Equity, Attributable to Parent [Abstract] Shareholders' equity: Preferred Stock, Value, Issued Preferred stock, $1 par value; 2,000,000 shares authorized; No shares issued and outstanding Common Stock, Value, Issued Common stock, $1 par value; 40,000,000 shares authorized; 17,029,317 and 16,925,672 shares issued and outstanding, respectively Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Equity, Attributable to Parent BALANCE BALANCE Total shareholders' equity attributable to SmartFinancial Inc. and Subsidiary Shareholders' equity Equity, Attributable to Noncontrolling Interest Non-controlling interest - preferred stock of subsidiary Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Debt Securities, Held-to-Maturity, Fair Value Securities held to maturity, fair value Total Fair Value Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Balance (in shares) Balance (in shares) Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) Consolidated Statements of Income Interest and Dividend Income, Operating [Abstract] INCOME: Interest income: Interest and Fee Income, Loans and Leases Loans and leases, including fees Interest Income, Securities, Operating, by Taxable Status [Abstract] Securities: Interest Income, Securities, Operating, Taxable Taxable Interest Income, Securities, Operating, Tax Exempt Tax-exempt Interest income on federal funds sold. Federal funds sold represent the excess federal funds held by one commercial bank which it lends to another commercial bank, usually at an agreed-upon (federal funds) rate of interest. Such loans generally are of short-duration (overnight) and the amount of other interest earning assets not otherwise specified in the taxonomy. Federal Funds Sold and Other Earning Assets Federal funds sold and other earning assets Interest Income, Operating Interest income Total interest income Interest income Interest Expense, Operating and Nonoperating [Abstract] Interest expense: Interest Expense, Deposits Deposits Interest expense borrowings excluding subordinated debt. Interest Expense Borrowings Excluding Subordinated Debt Borrowings Interest Expense, Subordinated Notes and Debentures Subordinated debt Interest Expense, Operating Interest expense Total interest expense Total interest expense Interest Income (Expense), Operating Net interest income Net interest income Provision for Loan, Lease, and Other Losses Provision for credit losses Interest Income (Expense), after Provision for Loan Loss Net interest income after provision for credit losses Net interest income after provision for credit losses Noninterest Income [Abstract] Noninterest income: Noninterest income: Fees And Commissions, Depositor Accounts1 Fees And Commissions, Depositor Accounts1 Service charges on deposit accounts Debt Securities, Available-for-Sale, Gain (Loss) Gain (loss) on sale of securities, net Loss on sale of securities Mortgage and other noninterest income. Mortgage And Other Noninterest Income Mortgage banking Investment Banking Revenue Investment services Insurance Commissions and Fees Insurance commissions Fees And Commissions, Debit Cards1 Fees And Commissions, Debit Cards1 Interchange and debit card transaction fees, net After-tax gain on sale of SBKI Gain from sale of SBKI Gain on sale of SBK Insurance ("SBKI") Gain on sale of SBKI Noninterest Income, Other Other Other Noninterest Income Total noninterest income Total noninterest income Noninterest Expense [Abstract] Noninterest expense: Labor and Related Expense Salaries and employee benefits Salaries and employee benefits Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense and equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item may also include furniture expenses. Net Occupancy and Equipment Expense Occupancy and equipment Occupancy and equipment Federal Deposit Insurance Corporation Premium Expense FDIC insurance FDIC insurance Foreclosed Real Estate Expense Other real estate and loan related expense Other real estate and loan related expense Advertising Expense Advertising and marketing Advertising and marketing Information Technology and Data Processing Data processing and technology Data processing and technology Professional Fees Professional services Professional services Amortization of intangible assets Amortization of intangibles Amortization of intangibles Business Combination, Acquisition-Related Cost, Expense Merger related and restructuring expenses Other Noninterest Expense Other operating expenses Other Noninterest Expense Total noninterest expense Total noninterest expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income tax expense Income before income tax expense Income Tax Expense (Benefit) Income tax benefit Income tax expense Total income tax expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Earnings Per Share Earnings per common share: Earnings Per Share, Basic Basic earnings per share (in dollars per share) Basic (in dollars per share) Earnings Per Share, Diluted Diluted earnings per common share (in dollars per share) Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Average common shares outstanding - diluted Consolidated Statements of Comprehensive Income Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss): OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Unrealized holding gains on securities available-for-sale OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Tax effect OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), before Tax Amortization of unrealized gains on investment securities transferred from available-for-sale to held-to-maturity OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), Tax Tax effect Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Reclassification adjustment for realized (gains) losses, net included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Tax effect OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Unrealized gains on securities available-for-sale, net of tax Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax Unrealized gains (losses) on fair value mortgage-backed security hedges Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, Tax Tax effect Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax Reclassification adjustment for realized gains included in net income Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, Tax Tax effect Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax and Reclassification Adjustment Unrealized gains (losses) on fair value hedged instruments arising during the period, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Unrealized gains (losses) on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Tax effect Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Reclassification adjustment for realized losses included in net income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Tax effect Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Unrealized gains (losses) on cash flow hedge instruments arising during the period, net of tax Other Comprehensive Income (Loss), Net of Tax Total other comprehensive income Other comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Consolidated Statements of Changes in Shareholders' Equity Equity Components [Axis] Equity Component [Domain] Parent [Member] Total Common Shareholders' Equity Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Retained Earnings AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Noncontrolling Interest [Member] Non-controlling Interest - Preferred Stock of Subsidiary Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption, Adjustment [Member] Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Cumulative Effect, Period of Adoption, Adjusted Balance Accounting Standards Update [Axis] Accounting Standards Update [Domain] Accounting Standards Update 2016-13 [Member] Accounting Standards Update 2016-13 Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Stock Issued During Period, Value, Stock Options Exercised Stock options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Exercised (in shares) Stock options exercised (in shares) Exercise of options Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Restricted stock, net of forfeitures Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock, net of forfeitures (in shares) Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Restricted stock, withheld for taxes Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Restricted stock, withheld for taxes (in shares) Noncontrolling Interest, Increase from Subsidiary Equity Issuance Issuance of preferred stock of subsidiary - non-controlling interest APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Stock compensation expense Dividends, Common Stock Common stock dividend ($0.32 per share) Stock Repurchased and Retired During Period, Value Repurchases of common stock Stock Repurchased and Retired During Period, Shares Repurchases of common stock (in shares) Common Stock, Dividends, Per Share, Cash Paid Common stock dividend (in dollars per share) Consolidated Statements of Cash Flows Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Cash flows from operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Share-Based Payment Arrangement, Noncash Expense Stock compensation expense Deferred Income Tax Expense (Benefit) Deferred income tax (benefit) expense Bank Owned Life Insurance Income Increase in cash surrender value of bank-owned life insurance