3.24.3 html 744 380 1 true 107 0 false 7 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.bankatfidelity.com/20240930/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Consolidated Balance Sheets (Current Period Unaudited) Sheet http://www.bankatfidelity.com/20240930/role/statement-consolidated-balance-sheets-current-period-unaudited Consolidated Balance Sheets (Current Period Unaudited) Statements 2 false false R3.htm 002 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) Sheet http://www.bankatfidelity.com/20240930/role/statement-consolidated-balance-sheets-current-period-unaudited-parentheticals Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Consolidated Statements of Income (Unaudited) Sheet http://www.bankatfidelity.com/20240930/role/statement-consolidated-statements-of-income-unaudited Consolidated Statements of Income (Unaudited) Statements 4 false false R5.htm 004 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.bankatfidelity.com/20240930/role/statement-consolidated-statements-of-comprehensive-income-unaudited Consolidated Statements of Comprehensive Income (Unaudited) Statements 5 false false R6.htm 005 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Unaudited) Sheet http://www.bankatfidelity.com/20240930/role/statement-consolidated-statements-of-changes-in-shareholders-equity-unaudited Consolidated Statements of Changes in Shareholders' Equity (Unaudited) Statements 6 false false R7.htm 006 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.bankatfidelity.com/20240930/role/statement-consolidated-statements-of-cash-flows-unaudited Consolidated Statements of Cash Flows (Unaudited) Statements 7 false false R8.htm 007 - Disclosure - Note 1 - Nature of Operations and Critical Accounting Policies Sheet http://www.bankatfidelity.com/20240930/role/statement-note-1-nature-of-operations-and-critical-accounting-policies Note 1 - Nature of Operations and Critical Accounting Policies Notes 8 false false R9.htm 008 - Disclosure - Note 2 - New Accounting Pronouncements Sheet http://www.bankatfidelity.com/20240930/role/statement-note-2-new-accounting-pronouncements Note 2 - New Accounting Pronouncements Notes 9 false false R10.htm 009 - Disclosure - Note 3 - Accumulated Other Comprehensive Income Sheet http://www.bankatfidelity.com/20240930/role/statement-note-3-accumulated-other-comprehensive-income Note 3 - Accumulated Other Comprehensive Income Notes 10 false false R11.htm 010 - Disclosure - Note 4 - Investment Securities Sheet http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities Note 4 - Investment Securities Notes 11 false false R12.htm 011 - Disclosure - Note 5 - Loans and Leases Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases Note 5 - Loans and Leases Notes 12 false false R13.htm 012 - Disclosure - Note 6 - Earnings Per Share Sheet http://www.bankatfidelity.com/20240930/role/statement-note-6-earnings-per-share Note 6 - Earnings Per Share Notes 13 false false R14.htm 013 - Disclosure - Note 7 - Stock Plans Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans Note 7 - Stock Plans Notes 14 false false R15.htm 014 - Disclosure - Note 8 - Fair Value Measurements Sheet http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements Note 8 - Fair Value Measurements Notes 15 false false R16.htm 015 - Disclosure - Note 9 - Employee Benefits Sheet http://www.bankatfidelity.com/20240930/role/statement-note-9-employee-benefits Note 9 - Employee Benefits Notes 16 false false R17.htm 016 - Disclosure - Note 10 - Derivative Instruments Sheet http://www.bankatfidelity.com/20240930/role/statement-note-10-derivative-instruments Note 10 - Derivative Instruments Notes 17 false false R18.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 18 false false R19.htm 995463 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.bankatfidelity.com/20240930/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.bankatfidelity.com/20240930/role/statement-note-1-nature-of-operations-and-critical-accounting-policies 19 false false R20.htm 995464 - Disclosure - Note 3 - Accumulated Other Comprehensive Income (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-3-accumulated-other-comprehensive-income-tables Note 3 - Accumulated Other Comprehensive Income (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-3-accumulated-other-comprehensive-income 20 false false R21.htm 995465 - Disclosure - Note 4 - Investment Securities (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities-tables Note 4 - Investment Securities (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities 21 false false R22.htm 995466 - Disclosure - Note 5 - Loans and Leases (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-tables Note 5 - Loans and Leases (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases 22 false false R23.htm 995467 - Disclosure - Note 6 - Earnings Per Share (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-6-earnings-per-share-tables Note 6 - Earnings Per Share (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-6-earnings-per-share 23 false false R24.htm 995468 - Disclosure - Note 7 - Stock Plans (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-tables Note 7 - Stock Plans (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans 24 false false R25.htm 995469 - Disclosure - Note 8 - Fair Value Measurements (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements-tables Note 8 - Fair Value Measurements (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements 25 false false R26.htm 995470 - Disclosure - Note 10 - Derivative Instruments (Tables) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-10-derivative-instruments-tables Note 10 - Derivative Instruments (Tables) Tables http://www.bankatfidelity.com/20240930/role/statement-note-10-derivative-instruments 26 false false R27.htm 995471 - Disclosure - Note 3 - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-3-accumulated-other-comprehensive-income-components-of-accumulated-other-comprehensive-income-details Note 3 - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) Details 27 false false R28.htm 995472 - Disclosure - Note 3 - Accumulated Other Comprehensive Income - Amount Reclassified from Accumulated Other Comprehensive Income (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-3-accumulated-other-comprehensive-income-amount-reclassified-from-accumulated-other-comprehensive-income-details Note 3 - Accumulated Other Comprehensive Income - Amount Reclassified from Accumulated Other Comprehensive Income (Details) Details 28 false false R29.htm 995473 - Disclosure - Note 4 - Investment Securities (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities-details-textual Note 4 - Investment Securities (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities-tables 29 false false R30.htm 995474 - Disclosure - Note 4 - Investment Securities - Summary of Amortized Cost and Fair Value of Investment Securities (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities-summary-of-amortized-cost-and-fair-value-of-investment-securities-details Note 4 - Investment Securities - Summary of Amortized Cost and Fair Value of Investment Securities (Details) Details 30 false false R31.htm 995475 - Disclosure - Note 4 - Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities-summary-of-amortized-cost-and-fair-value-by-contractual-maturity-details Note 4 - Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Details) Details 31 false false R32.htm 995476 - Disclosure - Note 4 - Investment Securities - Continuous Unrealized Loss Position (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-4-investment-securities-continuous-unrealized-loss-position-details Note 4 - Investment Securities - Continuous Unrealized Loss Position (Details) Details 32 false false R33.htm 995477 - Disclosure - Note 5 - Loans and Leases (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-details-textual Note 5 - Loans and Leases (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-tables 33 false false R34.htm 995478 - Disclosure - Note 5 - Loans and Leases - Classifications of Loans and Leases (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-classifications-of-loans-and-leases-details Note 5 - Loans and Leases - Classifications of Loans and Leases (Details) Details 34 false false R35.htm 995479 - Disclosure - Note 5 - Loans and Leases - Unamortized Nets Costs and Premiums Included in Loans (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-unamortized-nets-costs-and-premiums-included-in-loans-details Note 5 - Loans and Leases - Unamortized Nets Costs and Premiums Included in Loans (Details) Details 35 false false R36.htm 995480 - Disclosure - Note 5 - Loans and Leases - Non-accrual Loans (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-nonaccrual-loans-details Note 5 - Loans and Leases - Non-accrual Loans (Details) Details 36 false false R37.htm 995481 - Disclosure - Note 5 - Loans and Leases - Troubled Debt Restructurings (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-troubled-debt-restructurings-details Note 5 - Loans and Leases - Troubled Debt Restructurings (Details) Details 37 false false R38.htm 995482 - Disclosure - Note 5 - Loans and Leases - Summary of Financing Receivables With Payment Default (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-summary-of-financing-receivables-with-payment-default-details Note 5 - Loans and Leases - Summary of Financing Receivables With Payment Default (Details) Details 38 false false R39.htm 995483 - Disclosure - Note 5 - Loans and Leases - Past Due Loans (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-past-due-loans-details Note 5 - Loans and Leases - Past Due Loans (Details) Details 39 false false R40.htm 995484 - Disclosure - Note 5 - Loans and Leases - Credit Risk Profile (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-credit-risk-profile-details Note 5 - Loans and Leases - Credit Risk Profile (Details) Details 40 false false R41.htm 995485 - Disclosure - Note 5 - Loans and Leases - Collateral Dependent Loans (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-collateral-dependent-loans-details Note 5 - Loans and Leases - Collateral Dependent Loans (Details) Details 41 false false R42.htm 995486 - Disclosure - Note 5 - Loans and Leases - Change in Allowance (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-change-in-allowance-details Note 5 - Loans and Leases - Change in Allowance (Details) Details 42 false false R43.htm 995487 - Disclosure - Note 5 - Loans and Leases - Credit Loss on Unfunded Commitments (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-credit-loss-on-unfunded-commitments-details Note 5 - Loans and Leases - Credit Loss on Unfunded Commitments (Details) Details 43 false false R44.htm 995488 - Disclosure - Note 5 - Loans and Leases - Undiscounted Cash Flows for Direct Finance Leases (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-5-loans-and-leases-undiscounted-cash-flows-for-direct-finance-leases-details Note 5 - Loans and Leases - Undiscounted Cash Flows for Direct Finance Leases (Details) Details 44 false false R45.htm 995489 - Disclosure - Note 6 - Earnings Per Share (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-6-earnings-per-share-details-textual Note 6 - Earnings Per Share (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-6-earnings-per-share-tables 45 false false R46.htm 995490 - Disclosure - Note 6 - Earnings Per Share - Computation of Basic and Diluted EPS (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-6-earnings-per-share-computation-of-basic-and-diluted-eps-details Note 6 - Earnings Per Share - Computation of Basic and Diluted EPS (Details) Details 46 false false R47.htm 995491 - Disclosure - Note 7 - Stock Plans (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-details-textual Note 7 - Stock Plans (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-tables 47 false false R48.htm 995492 - Disclosure - Note 7 - Stock Plans - Summary of Weighted Average Fair Value and Vesting of Restricted Stock Grants (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-summary-of-weighted-average-fair-value-and-vesting-of-restricted-stock-grants-details Note 7 - Stock Plans - Summary of Weighted Average Fair Value and Vesting of Restricted Stock Grants (Details) Details 48 false false R49.htm 995493 - Disclosure - Note 7 - Stock Plans - Non-vested Restricted Stock (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-nonvested-restricted-stock-details Note 7 - Stock Plans - Non-vested Restricted Stock (Details) Details 49 false false R50.htm 995494 - Disclosure - Note 7 - Stock Plans - Summary of SSARs (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-summary-of-ssars-details Note 7 - Stock Plans - Summary of SSARs (Details) Details 50 false false R51.htm 995495 - Disclosure - Note 7 - Stock Plans - Stock-based Compensation Expense (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-stockbased-compensation-expense-details Note 7 - Stock Plans - Stock-based Compensation Expense (Details) Details 51 false false R52.htm 995496 - Disclosure - Note 7 - Stock Plans - Unrecognized Stock-based Compensation Expense (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-7-stock-plans-unrecognized-stockbased-compensation-expense-details Note 7 - Stock Plans - Unrecognized Stock-based Compensation Expense (Details) Details 52 false false R53.htm 995497 - Disclosure - Note 8 - Fair Value Measurements (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements-details-textual Note 8 - Fair Value Measurements (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements-tables 53 false false R54.htm 995498 - Disclosure - Note 8 - Fair Value Measurements - Carrying Amount and Estimated Fair Value (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements-carrying-amount-and-estimated-fair-value-details Note 8 - Fair Value Measurements - Carrying Amount and Estimated Fair Value (Details) Details 54 false false R55.htm 995499 - Disclosure - Note 8 - Fair Value Measurements - Fair Value on a Recurring Basis (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements-fair-value-on-a-recurring-basis-details Note 8 - Fair Value Measurements - Fair Value on a Recurring Basis (Details) Details 55 false false R56.htm 995500 - Disclosure - Note 8 - Fair Value Measurements - Fair Value on a Nonrecurring Basis (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-8-fair-value-measurements-fair-value-on-a-nonrecurring-basis-details Note 8 - Fair Value Measurements - Fair Value on a Nonrecurring Basis (Details) Details 56 false false R57.htm 995501 - Disclosure - Note 9 - Employee Benefits (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-9-employee-benefits-details-textual Note 9 - Employee Benefits (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-9-employee-benefits 57 false false R58.htm 995502 - Disclosure - Note 10 - Derivative Instruments (Details Textual) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-10-derivative-instruments-details-textual Note 10 - Derivative Instruments (Details Textual) Details http://www.bankatfidelity.com/20240930/role/statement-note-10-derivative-instruments-tables 58 false false R59.htm 995503 - Disclosure - Note 10 - Derivative Instruments - Schedule of Derivative Instruments (Details) Sheet http://www.bankatfidelity.com/20240930/role/statement-note-10-derivative-instruments-schedule-of-derivative-instruments-details Note 10 - Derivative Instruments - Schedule of Derivative Instruments (Details) Details 59 false false All Reports Book All Reports fdbc-20240930.xsd fdbc-20240930_cal.xml fdbc-20240930_def.xml fdbc-20240930_lab.xml fdbc-20240930_pre.xml fdbc20240930c_10q.htm http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/ecd/2024 true true