Document And Entity Information
ecd_TrdArrIndTitle
Trading Arrangement, Individual Title
Statistical Measurement [Axis]
ecd_TrdArrIndName
Trading Arrangement, Individual Name
Note To Financial Statement Details Textual
ecd_TrdArrExpirationDate
Trading Arrangement Expiration Date
Significant Accounting Policies
Investment income
ecd_TrdArrAdoptionDate
Trading Arrangement Adoption Date
Note 3 - Redeemable Noncontrolling Interest
Provision for income taxes
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Note 4 - Derivative Instruments and Hedging Activities
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Note 5 - Fair Value Measurements
Trading Arrangements, by Individual [Table]
Note 6 - Accumulated Other Comprehensive Income (Loss)
Material Terms of Trading Arrangement [Text Block]
Note 7 - Segment Reporting
gnrc_GainLossOnDispositionOfAssetsExcludingDispositionOfBusinessCredit
Loss on disposal of assets
The gain (loss) on disposition of assets, excluding the disposition of business credit.
Note 8 - Balance Sheet Details
Note 9 - Goodwill
Note 10 - Product Warranty Obligations
Note 12 - Credit Agreements
Minimum [Member]
Note 14 - Earnings Per Share
Note 3 - Redeemable Noncontrolling Interests - Redeemable Noncontrolling Interest (Details)
Adjusted EBITDA by reportable segment
gnrc_AdjustedEBITDA
Represents net income before interest expense, taxes, depreciation and amortization, as further adjusted for other non-cash items
Statistical Measurement [Domain]
Note 4 - Derivative Instruments and Hedging Activities - Fair Value of Derivatives (Details)
Maximum [Member]
ecd_TrdArrSecuritiesAggAvailAmt
Trading Arrangement, Securities Aggregate Available Amount
Note 5 - Fair Value Measurements - Reconciliation of Contingent Consideration (Details)
Share Repurchase Program [Axis]
Note 6 - Accumulated Other Comprehensive Loss - Disclosure of Changes in Accumulated Other Comprehensive Loss (Details)
Intersegment Sales [Member]
Represents intersegment sales.
Share Repurchase Program [Domain]
External Net Sales [Member]
Represents external net sales.
Note 7 - Segment Reporting - Total Sales (Details)
Litigation Case [Domain]
Note 7 - Segment Reporting - Profit and Loss (Details)
Extended Warranties [Member]
Relating to extended warranties.
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
gnrc_Other
Other (8)
Represents other non-cash items that are not categorized separately.
Note 7 - Segment Reporting - Provision for Legal, Regulatory and Product Charges (Details)
gnrc_LossOnModificationOfDebt
Loss on Extinguishment of Debt
Represents information about loss on modification of debt.
Note 7 - Segment Reporting - Segment Information (Details)
us-gaap_InvestmentOwnedPercentOfNetAssets
Investment Owned, Net Assets, Percentage
Note 8 - Balance Sheet Details - Inventories (Details)
Note 8 - Balance Sheet Details - Property and Equipment (Details)
Note 8 - Balance Sheet Details - Other Accrued Liabilities (Details)
Note 9 - Goodwill - Carrying Amount of Goodwill (Details)
Note 10 - Product Warranty Obligations - Reconciliation of Product Warranty Liability (Details)
Note 10 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties (Details)
Note 10 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties 2 (Details)
Note 10 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties (Details) (Parentheticals)
Business Description and Basis of Presentation [Text Block]
Business Combination, Contingent Consideration [Table Text Block]
Note 10 - Product Warranty Obligations - Deferred Product Obligations (Details)
Note 12 - Credit Agreements - Long-term Borrowings (Details)
Note 12 - Credit Agreements - Maturities of Long-term Borrowings Outstanding (Details)
Note 14 - Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details)
Notes To Financial Statements
us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests
Balance
Balance
Notes To Financial Statements [Abstract]
Counterparty Name [Axis]
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective Income Tax Rate Reconciliation, Percent
us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Accrued wages and employee benefits
gnrc_CovenantMinimumInterestCoverageRatio
Covenant Minimum Interest Coverage Ratio
The minimum interest coverage ratio required under the covenant.
Litigation Case [Axis]
Leasehold Improvements [Member]
Counterparty Name [Domain]
us-gaap_IncreaseDecreaseInInventories
Inventories
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Segment Reporting [Text Block]
gnrc_DebtInstrumentSOFRFloor
Debt Instrument, SOFR Floor
SOFR floor rate on debt instrument.
Tranche A Term Loan Facility and Revolving Credit Facility [Member]
Represent the Tranche A Term Loan Facility and Revolving Credit Facility.
us-gaap_IncreaseDecreaseInOtherAccruedLiabilities
Other accrued liabilities
Segment Reporting [Table Text Block]
Adjustments to reconcile net income to net cash provided by operating activities:
Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block]
us-gaap_Liabilities
Total liabilities
Consolidation Items [Axis]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders’ equity
Long-lived Assets [Member]
Represents long-lived assets.
Segment Reporting [Table]
Selling and service
Case No. 22-cv-00072-JRG [Member]
Represents Case No. 22-cv-00072-JRG.
Stock Repurchase Program [Member]
Represents the Stock Repurchase Program.
us-gaap_ShareBasedCompensation
Share-based compensation expense
Subsequent Event [Member]
Consolidation Items [Domain]
Unrealized gain (loss) on interest rate swaps, tax
Unrealized loss on interest rate swaps, net of tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Net changes in operating assets and liabilities:
us-gaap_IncreaseDecreaseInAccountsPayable
Accounts payable
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Fair Value, by Balance Sheet Grouping [Table]
Tranche A Term Loan Facility [Member]
Borrowing supported by a written promise to pay an obligation.
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net decrease in cash and cash equivalents
Tranche B Term Loan Facility [Member]
Borrowing supported by a written promise to pay an obligation.
gnrc_TreasuryStockSharesAcquiredInSettlementOfRestrictedStockAwards
Net share settlement of restricted stock awards (in shares)
Number of shares that have been repurchased during the period and are being held in treasury in settlement of restricted stock award.
Effect of foreign exchange rate changes on cash and cash equivalents
gnrc_TreasuryStockValueAcquiredInSettlementOfRestrictedStockAwardCostMethod
Net share settlement of restricted stock awards
Equity impact of the cost of common and preferred stock that were repurchased during the period in settlement of restricted stock award. Recorded using the cost method.
us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
Business Combination, Contingent Consideration, Liability, Current
us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent
Business Combination, Contingent Consideration, Liability, Noncurrent
New Accounting Pronouncements, Policy [Policy Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Statement [Table]
Credit Facility [Axis]
Credit Facility [Domain]
Revolving Credit Facility [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
us-gaap_GainLossOnSaleOfBusiness
Gain (Loss) on Disposition of Business
Loss attributable to business dispositions
Net income
us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Equity Securities [Member]
Redeemable Noncontrolling Interest [Table Text Block]
us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Line of Credit Facility, Remaining Borrowing Capacity
srt_StockRepurchaseProgramAuthorizedAmount1
Stock Repurchase Program, Authorized Amount
Long-Term Debt, Type [Axis]
us-gaap_EquitySecuritiesFvNiGainLoss
Equity Securities, FV-NI, Gain (Loss)
Product and Service [Domain]
gnrc_AccrualForLegalSettlementsToBePaidInCash
Accrual for Legal Settlements to be Paid in Cash
Represents the amount reserved for legal settlements to be paid in cash.
Product and Service [Axis]
Ownership [Axis]
us-gaap_LineOfCredit
Long-Term Line of Credit
Ownership [Domain]
Revolving Facility
gnrc_NetIncomeLossAvailableToCommonStockholders
Net income attributable to common shareholders
Net income after adjustments for redeemable noncontrolling interest redemption value.
Line of Credit Facility [Table]
Asset Class [Axis]
Deferred revenue contracts issued
Schedule of Maturities of Long-Term Debt [Table Text Block]
us-gaap_ExtendedProductWarrantyAccrual
Total
Balance at beginning of period
Balance at end of period
Commitments and Contingencies Disclosure [Text Block]
Statement [Line Items]
Liability Class [Axis]
Fair Value Hierarchy and NAV [Axis]
Common stock, shares issued (in shares)
Common stock, shares authorized (in shares)
us-gaap_ExtendedProductWarrantyAccrualNoncurrent
Long-term portion - deferred revenue
us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Share Repurchase Program, Remaining Authorized, Amount
us-gaap_ExtendedProductWarrantyAccrualCurrent
Current portion - other accrued liabilities
Schedule of Product Warranty Liability [Table Text Block]
us-gaap_ExtinguishmentOfDebtAmount
Extinguishment of Debt, Amount
gnrc_BusinessCombinationContingentConsiderationGainLossChangeInFairValue
Other noncash charges
Amount of gain (loss) from change in fair value of contingent consideration from business combination.
Common stock, par value $0.01, 500,000,000 shares authorized, 74,218,726 and 74,050,753 shares issued at March 31, 2026 and December 31, 2025, respectively
Schedule of Inventory, Current [Table Text Block]
us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
Accounts payable
Finance lease obligations
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_TableTextBlock
Notes Tables
Comprehensive Income (Loss) Note [Text Block]
Comprehensive income attributable to Generac Holdings Inc.
Customer lists, net
Carrying amount, net of accumulated amortization, as of the balance sheet date of an asset having a finite beneficial life acquired in a business combination or other transaction representing a favorable existing relationship with customers.
us-gaap_ShortTermDebtWeightedAverageInterestRate
Short-Term Debt, Weighted Average Interest Rate, at Point in Time
Redeemable Noncontrolling Interest [Member]
Information pertaining to redeemable noncontrolling interest.
Disposal Group Classification [Axis]
Less: current portion of finance lease obligations
Disposal Group Classification [Domain]
Short-term borrowings
Short-Term Debt
Tradenames, net
The net carrying amount as of the balance sheet date of indefinite-lived and finite-lived tradenames on the statement of financial position representing the rights acquired through registration of a trade name to gain or protect exclusive use thereof.
Subsequent Events [Text Block]
Capital expenditure
us-gaap_SegmentExpenditureAdditionToLongLivedAssets
Concentration Risk Type [Axis]
Proceeds from long-term borrowings
Accrued wages and employee benefits
Depreciation and Amortization
gnrc_DepreciationDepletionAndAmortizationIncludingAdditionalAcceleratedDepreciation
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Amount includes additional accelerated depreciation recognized in the current period.
Accrued product warranty
gnrc_ExcessPurchasePriceOverPredecessorBasis
Excess purchase price over predecessor basis
The element that represents the excess purchase price over predecessor basis.
Other accrued liabilities
Total
Less: current portion of debt
Concentration Risk Type [Domain]
Other intangible assets, net
2027
us-gaap_LongTermDebtNoncurrent
Total
2029
2028
2026
2030
Warranty reserve assumed in acquisition
Long-term portion - other long-term liabilities
us-gaap_StandardProductWarrantyAccrual
Total
Balance at beginning of period
Balance at end of period
Current portion - accrued product warranty
Proceeds from sale of property and equipment
Provision for warranty issued
gnrc_NumberOfNewContractsEntered
Number of New Contracts Entered
Number of new contracts entered into during the period mentioned.
gnrc_DerivativeAssetsLiabilitiesNetFairValueOfDerivativeContractsExcludingImpactOfCreditRisk
Derivative Assets (Liabilities), Net Fair Value of Derivative Contracts, Excluding Impact of Credit Risk
Represents the fair value of derivative contracts excluding impact of credit risk.
us-gaap_LongTermInvestments
Long-Term Investments
us-gaap_LongTermDebt
Long-Term Debt
Changes in estimates for pre-existing warranties
Share Repurchase Program [Table]
Schedule Of Derivative Assets (Liabilities) at Fair Value [Table Text Block]
Tabular disclosure of derivative assets and liabilities at fair value.
us-gaap_StandardProductWarrantyAccrualPayments
Payments
us-gaap_LossContingencyAccrualAtCarryingValue
Loss Contingency Accrual
Statement of Stockholders' Equity [Abstract]
Loss Contingencies [Table]
Loss Contingency Nature [Axis]
Statement of Cash Flows [Abstract]
Proceeds from short-term borrowings
Long-Term Debt, Type [Domain]
Stockholders’ equity:
Equity Components [Axis]
Proceeds from the exercise of stock options
Equity Component [Domain]
Product Warranty Disclosure [Text Block]
Fair Value, Inputs, Level 2 [Member]
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Inputs, Level 1 [Member]
AOCI Attributable to Parent [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Costs of goods sold
Costs of goods sold
Loss Contingency, Nature [Domain]
Asset Acquisition [Table]
Property and equipment, net
Total
us-gaap_PropertyPlantAndEquipmentGross
Property and equipment, gross
Subsequent Event Type [Domain]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Deferred income taxes
gnrc_ThresholdForSecuredLeverageRatioExcessCashFlowPaymentRequirement
Threshold for Secured Leverage Ratio Excess Cash Flow Payment Requirement
The threshold for secured leverage ration required for the excess cash flow payment requirement.
Machinery and Equipment [Member]
Contingent Consideration Liability [Member]
Represents contingent consideration liabilities.
Share-based compensation
us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Intangible Asset and Goodwill [Text Block]
Dies and Tools [Member]
Tangible personal property used to produce goods and services.
Stock Warrants [Member]
Security that gives the holder the right to purchase shares of stock in accordance with the terms of the instrument, usually upon payment of a specified amount.
Amortization of deferred revenue contracts
Represents the aggregate decrease in the liability for accruals related to extended product warranties issued during the reporting period, due to amortization of deferred revenue.
Deferred income taxes
us-gaap_DeferredIncomeTaxLiabilitiesNet
Estimated Prejudgment Interest [Member]
An existing condition, situation, or set of circumstances involving uncertainty as to possible loss to an enterprise that will ultimately be resolved when one or more future events occur or fail to occur. Resolution of the uncertainty may confirm the incurrence of a loss or impairment of an asset or the incurrence of a liability.
gnrc_PaymentsOfDeferredAcquisitionRelatedCostsFinancingActivities
Payment of deferred acquisition consideration
The cash outflow for deferred financing costs associated with business combinations.
Fair Value Disclosures [Text Block]
2031
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in sixth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Wallbox N.V. [Member]
Named other party that participates in a financial transaction. Examples include, but not limited to, the name of the financial institution.
Product Warranty Obligations Included In Consolidated Balance Sheet [Table Text Block]
Product warranty obligations included in consolidated balance sheet.
Current liabilities:
Change in fair value of investments
Change in fair value of investments
us-gaap_LiabilitiesCurrent
Total current liabilities
Secured Overnight Financing Rate (SOFR) [Member]
Treasury Stock [Text Block]
Accounts receivable, less allowance for credit losses of $33,283 and $34,504 at March 31, 2026 and December 31, 2025, respectively
Current portion of long-term borrowings and finance lease obligations
gnrc_UncommittedIncrementalTermLoanFacility
Uncommitted Incremental Term Loan Facility
Refers to uncommitted incremental term loan facility after amendment.
Disposition of business with a non-controlling interest
Adjustments to Additional Paid in Capital, Disposition of Business With a Non-controlling Interest.
Residential Segment [Member]
Represents Residential Segement.
Commercial and Industrial Segment [Member]
Represents Commercial and Industrial segment.
Immaterial Business Dispositions [Member]
Represents immaterial business dispositions.
Chilicon Acquisition [Member]
Represents Chilicon acquisition.
Clean Energy Warranty-related Matters [Member]
Represents clean energy warranty-related matters.
Revenue Benchmark [Member]
us-gaap_DebtAndCapitalLeaseObligations
Total
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Accumulated depreciation
gnrc_NumberOfReportingUnitImpaired
Number of Reporting Unit, Impaired
Number of reporting unit with impaired goodwill.
us-gaap_PaymentsToAcquireInvestments
Payments to Acquire Investments
gnrc_AmountFinancedByDealers
Amount Financed by Dealers
Amount financed by dealers to purchase goods from the entity.
Accumulated other comprehensive (loss) income
gnrc_AccruedOtherRecallReserve
Accrued Other, Recall Reserve
Amount of other accrued liabilities for recall reserve.
Segment Reporting, Reconciliation of Provision for Legal, Regulatory and Product Charges [Table Text Block]
Tabular presentation of the reconciliation of provision for legal, regulatory and other charges.
gnrc_AdditionalContingentConsiderationPaidInRestrictedSharesPercent
Additional Contingent Consideration, Paid in Restricted Shares, Percent
Percent of additional contingent consideration paid in restricted shares.
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Acquisition of business, net of cash acquired
Enercon Engineering, Inc. [Member]
Represents Enercon Engineering, Inc.
Long-term borrowings and finance lease obligations
Total long-term borrowings and finance lease obligations
Product Warranty Liability [Table]
General and administrative
Income before provision for income taxes
Income before provision for income taxes
Additional paid-in capital
us-gaap_JointVentureFormationFairValueOfJointVenture
Joint Venture Formation, Fair Value of Joint Venture
Debt Disclosure [Text Block]
Noncontrolling interests
Prepaid expenses and other current assets
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Expenditures for property and equipment
us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Subsidiary, Ownership Percentage, Noncontrolling Owner
UNITED STATES
us-gaap_MinorityInterestOwnershipPercentageByParent
Subsidiary, Ownership Percentage, Parent
Long-term borrowings
Long-Term Debt, Gross
us-gaap_DebtInstrumentFairValue
Debt Instrument, Fair Value Disclosure
gnrc_JointVentureFormationFundedByNoncontrollingInterestPercent
Joint Venture Formation, Funded by Non-controlling Interest, Percent
The percent value of the amount of the joint venture funded by the other party.
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Noncontrolling Interest [Table]
Raj Kanuru [Member]
Represents Raj Kanuru.
Amortization of deferred financing costs and original issue discount
Current assets:
Norm Taffe [Member]
Represents Norm Taffe.
E.A. Juffali and Brothers [Member]
E.A. Juffali and Brothers
Generac Juffali Generators WLL [Member]
Generac Juffali Generators WLL
Geographic Concentration Risk [Member]
us-gaap_AssetsCurrent
Total current assets
Elimination of intersegment cost of goods sold
us-gaap_GrossProfit
Gross profit
us-gaap_LitigationSettlementAmountAwardedToOtherParty
Litigation Settlement, Amount Awarded to Other Party
Goodwill [Table]
us-gaap_StockRepurchaseProgramPeriodInForce1
Stock Repurchase Program, Period in Force (Month)
Debt Instrument, Name [Domain]
New Revolving Facility [Member]
New Revolving Facility
New Tranche A Term Loan Facility and Term Loan B Facility [Member]
New Tranche A Term Loan Facility and Term Loan B Facility
Fair Value Measurement Inputs and Valuation Techniques [Table]
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
Depreciation and finance lease amortization
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
gnrc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAccretion
Present value interest accretion
Amount of accretions of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
gnrc_DebtInstrumentInterestRateReduction
Debt Instrument, Interest Rate, Reduction
The reduction in the contractual interest rate for funds borrowed, under the debt agreement.
us-gaap_TreasuryStockSharesAcquired
Treasury Stock, Shares, Acquired (in shares)
Stock repurchases (in shares)
Net income
Daniel Haak Lawsuit [Member]
Daniel Haak Lawsuit
Debt Instrument [Axis]
us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Original issue discount and deferred financing costs
New Credit Facility [Member]
New Credit Facility
New Tranche A Term Loan [Member]
New Tranche A Term Loan
Redeemable non-controlling interest
us-gaap_UnrealizedGainLossOnDerivatives
Unrealized Gain (Loss) on Derivatives
Operating activities
Release of warranty provision recorded in 2022 to address clean energy warranty-related matters
gnrc_ReleaseOfWarrantsProvision
Amount of release of warrants provision.
Excluding Extended Warranties [Member]
Represents performance obligations excluding extended warranties.
Investing activities
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Corporate and Eliminations [Member]
Represents corporate and eliminations.
Raw material
Financing activities
Work-in-process
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
Common Stock Plan [Member]
Represents common stock plan.
Stock Option Plan [Member]
Represents stock option plan.
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash used in financing activities
Finished goods
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Impairment charge
Operating Segments [Member]
Accounting Policies [Abstract]
Segments [Domain]
Accounts receivable, allowance for doubtful accounts
us-gaap_UnamortizedDebtIssuanceExpense
Unamortized Debt Issuance Expense
Segments [Axis]
Income Statement [Abstract]
Intersegment Eliminations [Member]
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Redeemable Noncontrolling Interest [Text Block]
Entire disclosure for redeemable noncontrolling interest.
us-gaap_DeferredIncomeTaxExpenseBenefit
Deferred income tax expense (benefit)
gnrc_ExtendedWarrantyTerm
Extended Warranty Term (Year)
Expiration period of the extended warranty.
us-gaap_TreasuryStockCommonValue
Treasury stock, at cost, 15,464,527 and 15,373,990 shares at March 31, 2026 and December 31, 2025, respectively
Treasury stock, shares (in shares)
Balance (in shares)
Balance (in shares)
Treasury Stock, Common [Member]
us-gaap_NetIncomeLoss
Net income attributable to Generac Holdings Inc.
Net income attributable to Generac Holdings Inc.
Amortization of intangible assets
Amortization of intangibles
us-gaap_PaymentsToAcquireLongtermInvestments
Payments to Acquire Long-Term Investments
Purchase of long-term investments
Accumulated Other Comprehensive Income (Loss) [Table]
Foreign currency translation rate changes
us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Income Tax Disclosure [Text Block]
us-gaap_BusinessCombinationContingentConsiderationLiability
Business Combination, Contingent Consideration, Liability
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_TemporaryEquityForeignCurrencyTranslationAdjustments
Foreign currency translation
us-gaap_TemporaryEquityNetIncome
Net loss
us-gaap_DeferredFinanceCostsNet
Debt Issuance Costs, Net
us-gaap_TreasuryStockValueAcquiredCostMethod
Treasury Stock, Value, Acquired, Cost Method
Stock repurchases
Supplemental Balance Sheet Disclosures [Text Block]
Fair Value Hierarchy and NAV [Domain]
Other (expense) income:
Statement of Financial Position [Abstract]
us-gaap_NonoperatingIncomeExpense
Total other expense, net
us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Repayments of long-term borrowings and finance lease obligations
us-gaap_RepaymentsOfShortTermDebt
Repayments of short-term borrowings
gnrc_CovenantMaximumTotalLeverageRatio
Covenant Maximum Total Leverage Ratio
The maximum financial condition covenant applicable to Tranche A Term Loan Facility and Revolving Facility only.
Vehicles [Member]
us-gaap_PaymentsForRepurchaseOfCommonStock
Stock repurchases
us-gaap_IncreaseDecreaseInOtherOperatingAssets
Other assets
Document Type
Operating expenses:
Document Information [Line Items]
Document Quarterly Report
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
Operating lease and other long-term liabilities
Present value of lessee's discounted obligation for lease payments from operating lease, and other liabilities classified as noncurrent.
Operating lease and other assets
Amount of lessee's right to use underlying asset under operating lease and other assets after one year or beyond the normal operating cycle, if longer.
Document Information [Table]
Revenue performance period (Year)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)
gnrc_PolicyTable
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Entity Interactive Data Current
Document Transition Report
Weighted average common shares outstanding - diluted: (in shares)
Weighted average shares, diluted (in shares)
Operating expenses
us-gaap_OperatingExpenses
Total operating expenses
us-gaap_LossContingencyDamagesSoughtValue
Loss Contingency, Damages Sought, Value
us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Dilutive effect of stock compensation awards (1) (in shares)
Weighted average common shares outstanding - basic: (in shares)
Weighted average shares, basic (in shares)
Change in fair value of investments (7)
us-gaap_UnrealizedGainLossOnInvestments
Derivative Instrument [Axis]
Antidilutive Security, Excluded EPS Calculation [Table]
us-gaap_EarningsPerShareBasic
Net income attributable to Generac Holdings Inc. per common share - basic: (in dollars per share)
Effective Income Tax Rate Reconciliation [Table]
Office Equipment [Member]
us-gaap_WriteOffOfDeferredDebtIssuanceCost
Deferred Debt Issuance Cost, Writeoff
Acquisitions and dispositions of businesses, net
us-gaap_GoodwillAcquiredDuringPeriod
Document Fiscal Period Focus
Document Fiscal Year Focus
Amendment Flag
Common Stock [Member]
Goodwill
Goodwill
Balance
Balance
Document Period End Date
Long-Lived Asset, Class [Domain]
Legal Entity [Axis]
Construction in Progress [Member]
Business Combination [Domain]
Fair Value of Derivatives
Entity File Number
Revenue performance obligation
Revenue, Remaining Performance Obligation, Amount
Entity Tax Identification Number
Provision for legal, regulatory, and other costs (6)
gnrc_ProvisionForLegalRegulatoryAndProductCharges
The amount of expense for legal costs, regulatory expenses, and product charges.
Business Combination [Axis]
Disaggregation of Revenue [Table Text Block]
Government Inquiries and Other Matters [Member]
Represents government inquiries and other matters.
Disaggregation of Revenue [Table]
Certain Patent Lawsuits [Member]
Represents certain patent lawsuits.
Entity [Domain]
Entity Central Index Key
Entity Registrant Name
us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Foreign currency translation adjustment
Entity Current Reporting Status
Entity Incorporation, State or Country Code
Land and Land Improvements [Member]
Current Fiscal Year End Date
Research and development
Entity Filer Category
Entity Shell Company
Entity Emerging Growth Company
Other comprehensive loss
us-gaap_OtherComprehensiveIncomeLossNetOfTax
Entity Small Business
us-gaap_DerivativeNumberOfInstrumentsHeld
Derivative, Number of Instruments Held, Total
Building and Building Improvements [Member]
us-gaap_OperatingIncomeLoss
Income from operations
gnrc_ExcessTaxBenefitsFromEquityAwards
Excess tax benefits from equity awards
The value of excess tax benefits from equity awards.
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount
Derivative Instruments and Hedging Activities Disclosure [Text Block]
us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Contract with Customer, Liability, Revenue Recognized
Other segment items (1)
us-gaap_SegmentReportingOtherItemAmount
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Entity Address, State or Province
Entity Address, City or Town
Inventory, Current [Table]
us-gaap_InterestExpenseNonoperating
Interest expense
Retained earnings
Entity Address, Address Line One
City Area Code
us-gaap_RevenueRemainingPerformanceObligationPercentage
Revenue, Remaining Performance Obligation, Percentage
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Taxes paid related to equity awards
Local Phone Number
Entity Address, Postal Zip Code
Revenue from Contract with Customer [Text Block]
Other
us-gaap_OtherBorrowings
Derivative [Table]
Title of 12(b) Security
Security Exchange Name
Trading Symbol
Class of Stock [Axis]
Base Rate [Member]
Commodity Contract [Member]
Variable Rate [Axis]
Variable Rate [Domain]
Entity Common Stock, Shares Outstanding
Earnings Per Share [Text Block]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Certain Class Action Lawsuits [Member]
Represents certain class action lawsuits.
Net (loss) income attributable to noncontrolling interests
Net income
us-gaap_ProfitLoss
Net income
Common stock issued under equity incentive plans, net of forfeitures and shares withheld for employee taxes and strike price
Equity impact of the value of stock issued under equity incentive plans, net of shares withheld for employee taxes.
Excess Purchase Price over Predecessor Basis [Member]
The excess purchase price over predecessor basis.
Accrued selling expenses
The amount of accrued selling expenses.
Common stock issued under equity incentive plans, net of forfeitures and shares withheld for employee taxes and strike price (in shares)
Number of shares issued under equity incentive plans, net of shares withheld for employee taxes.
Current contract liabilities
The amount of current contract liabilities.
Schedule of Other Accrued Liabilities [Table Text Block]
Tabular disclosure of schedule of other accrued liabilities.
us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Current operating lease liabilities
The amount of operating lease liabilities.
Accrued legal & professional fees
The amount of accrued legal & professional fees.
Property, Plant, and Equipment [Table]
Schedule of Other Accrued Liabilities [Table]
Disxlosure of the schedule of other accrued liabilities.
us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Other investing activities
Accrued other (1)
The amount of accrued other.
Common stock, par value (in dollars per share)
us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Business Combination, Consideration Transferred, Equity Interest
Derivative Contract [Domain]
Other, net
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements
Long-Lived Asset, Class [Axis]
Assets
us-gaap_Assets
Total assets
Cash and cash equivalents
us-gaap_InsuranceSettlementsReceivable
Insurance Settlements Receivable
Geographical [Domain]
Geographical [Axis]
us-gaap_EarningsPerShareDiluted
Net income attributable to Generac Holdings Inc. per common share - diluted: (in dollars per share)
Deferred revenue
us-gaap_ContractWithCustomerLiability
Contract with Customer, Liability
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
Payment of acquisition contingent consideration (in shares)
Number of shares of treasury stock issued during period for contingent consideration.
Payment of acquisition contingent consideration
Value of treasury stock issued for contingent consideration during period.
Power Home Solar, LLC Against Generac Power Systems, Inc. [Member]
Power Home Solar, LLC Against Generac Power Systems, Inc..
Asset Class [Domain]
Zawaski et al. v. General Power Systems, Inc., et al. [Member]
Zawaski et al. v. General Power Systems, Inc., et al.
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Allmand [Member]
Allmand
Fair Value by Liability Class [Domain]
Interest Rate Swap [Member]
Schedule of Long-Term Debt Instruments [Table Text Block]
Individual [Axis]
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total stockholders' equity
Balance
Balance
Inventories
Total
All Individuals [Member]
Revolving Facility [Member]
The revolving credit facility.
Patents and technology, net
Represents the carrying amount of finite-lived patents and technology as of balance sheet date.
Parent [Member]
Business Combination [Text Block]
Noncontrolling Interest [Member]
us-gaap_StockholdersEquity
Stockholders’ equity attributable to Generac Holdings Inc.
Goodwill [Table Text Block]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
us-gaap_FinanceLeaseRightOfUseAsset
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
All Trading Arrangements [Member]
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
Property, Plant, and Equipment [Table Text Block]
Sales
Net sales
Net sales
Net sales
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Trading Arrangement [Axis]