Document And Entity Information
us-gaap_DerivativeGainLossOnDerivativeNet
Derivative, Gain (Loss) on Derivative, Net
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 2 - Summary of Accounting Policies
Note 3 - Acquisitions
Risk free interest rate
Note 4 - Redeemable Noncontrolling Interest
Note 5 - Derivative Instruments and Hedging Activities
Note 6 - Accumulated Other Comprehensive Loss
Note 7 - Segment Reporting
Note 8 - Balance Sheet Details
Note 9 - Goodwill and Intangible Assets
Note 10 - Leases
Line of credit
Note 11 - Product Warranty Obligations
Note 12 - Credit Agreements
Note 14 - Earnings Per Share
Expected stock price volatility
Note 15 - Income Taxes
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 17 - Share Plans
Note 19 - Quarterly Financial Information (Unaudited)
Note 20 - Valuation and Qualifying Accounts
Note 2 - Summary of Accounting Policies - Summary of Allowance for Doubtful Accounts (Details)
Expected life of options (Year)
Note 2 - Summary of Accounting Policies - Property and Equipment Estimated Useful Lives (Details)
Note 2 - Summary of Accounting Policies - Reconciliation of Contingent Consideration (Details)
Note 3 - Acquisitions - The Combined Fair Value of the Consideration Transferred for These Acquisitions (Details)
Note 3 - Acquisitions - Preliminary Price Allocation (Details)
Note 3 - Acquisitions - Unaudited Pro Forma Information (Details)
Note 4 - Redeemable Noncontrolling Interest - Redeemable Noncontrolling Interest (Details)
Note 5 - Derivative Instruments and Hedging Activities - Fair Value of Derivatives (Details)
Note 6 - Accumulated Other Comprehensive Loss - Disclosure of Changes in Accumulated Other Comprehensive Loss (Details)
Note 7 - Segment Reporting - Net Sales by Products and Services (Details)
us-gaap_LitigationSettlementAmountAwardedToOtherParty
Litigation Settlement, Amount Awarded to Other Party
Note 7 - Segment Reporting - Total Sales by Reportable Segment (Details)
Note 7 - Segment Reporting - Segment Information (Details)
Note 8 - Balance Sheet Details - Inventories (Details)
Granted (in dollars per share)
Note 8 - Balance Sheet Details - Property and Equipment (Details)
Foreign currency translation adjustment
us-gaap_DerivativeNumberOfInstrumentsHeld
Derivative, Number of Instruments Held
Note 9 - Goodwill and Intangible Assets - Carrying Amount of Goodwill (Details)
Vested (in dollars per share)
Forfeited (in dollars per share)
Note 9 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Non-vested (in dollars per share)
Non-vested (in dollars per share)
Note 10 - Leases - Leases Cost (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited (in shares)
Note 10 - Leases - Supplement Balance Sheet Information Related to Leases (Details)
Note 10 - Leases - Supplement Cash Flow Information Related to Leases (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Non-vested (in shares)
Non-vested (in shares)
Note 10 - Leases - Weighted Average Remaining Lease Term and Discount Rate Information (Details)
us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Foreign currency translation adjustment
Note 10 - Leases - Maturities of Lease liabilities (Details)
Note 11 - Product Warranty Obligations - Reconciliation of Product Warranty Liability (Details)
Current portion of long-term borrowings and finance lease obligations
Note 11 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties (Details)
Note 11 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties 2 (Details)
Granted (in shares)
Note 11 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties (Details) (Parentheticals)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested (in shares)
Note 11 - 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)
Less: current portion of debt
Note 14 - Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details)
Note 15 - Income Taxes - Provision for Income Taxes (Details)
Note 15 - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)
Current-period comprehensive income (loss)
us-gaap_OtherComprehensiveIncomeLossNetOfTax
Other comprehensive income (loss)
Note 15 - Income Taxes - Unrecognized Tax Benefits (Details)
Note 15 - Income Taxes - Reconciliation of Statutory and Effective Tax Rates (Details)
Exercisable, weighted average exercise price (in dollars per share)
Note 17 - Share Plans - Weighted-average Assumptions used in the Black-Scholes-Merton Option Pricing Model (Details)
Note 17 - Share Plans - Summary of Stock Option Activity (Details)
us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Note 17 - Share Plans - Summary of Restricted Share Awards Activity (Details)
Foreign Exchange Contract [Member]
Note 19 - Quarterly Financial Information (Unaudited) - Unaudited Quarterly Financial Information (Details)
Commodity Contract [Member]
Note 20 - Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total stockholders’ equity
Balance
Balance
Exercisable, number of options (in shares)
Outstanding, weighted average remaining contractual term (Year)
Outstanding, aggregate intrinsic value
Weighted average grant date fair value per share (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Outstanding, weighted average exercise price (in dollars per share)
Outstanding, weighted average exercise price (in dollars per share)
Forfeited, weighted average exercise price (in dollars per share)
Granted, weighted average exercise price (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)
Exercised, weighted average exercise price (in dollars per share)
Accrued wages and employee benefits
Accounts payable
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Outstanding, number of options (in shares)
Outstanding, number of options (in shares)
Long-lived Assets [Member]
Represents long-lived assets.
Other accrued liabilities
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Case No. 22-cv-00072-JRG [Member]
Represents Case No. 22-cv-00072-JRG.
Stock Repurchase Program [Member]
Represents the Stock Repurchase Program.
Accrued product warranty
One Customer [Member]
Information pertaining to one major customer.
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)
Current liabilities:
Supplemental Balance Sheet Disclosures [Text Block]
Treasury Stock [Text Block]
Product [Member]
Assets
Total assets
Plan Name [Axis]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
us-gaap_LossContingencyDamagesSoughtValue
Loss Contingency, Damages Sought, Value
Deferred income taxes
Deferred Income Tax Assets, Net
us-gaap_CapitalizedContractCostNet
Capitalized Contract Cost, Net
Share-Based Payment Arrangement [Text Block]
Business Description and Basis of Presentation [Text Block]
Award Type [Domain]
us-gaap_MinorityInterestDecreaseFromRedemptions
Purchase of additional ownership interest
Award Type [Axis]
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Finite-lived intangible assets, accumulated amortization
Finite-lived intangible assets, net
Total intangible assets, net
Finite-lived intangible assets, gross
Net income attributable to noncontrolling interests
Net income
us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest
Indefinite-lived tradenames, gross
gnrc_NetIncomeLossAvailableToCommonStockholders
Net income attributable to common shareholders
Net income after adjustments for redeemable noncontrolling interest redemption value.
Comprehensive income attributable to noncontrolling interests
Commitments and Contingencies Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Accumulated depreciation
us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation
Change in noncontrolling interest share
Property and equipment, net
Total
Goodwill
Goodwill
Goodwill, Ending Balance
Balance
Balance
us-gaap_PropertyPlantAndEquipmentGross
Property and equipment, gross
us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests
Balance
Balance
gnrc_SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceMeasurementPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Performance Measurement, Period (Year)
Period of performance measurement for share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Pramac [Member]
Pramac is a leading manufacturer of portable, commercial and industrial generators primarily sold under the Pramac brand, including PR Industrial S.r.1 and its subsidiaries.
Share of net income (loss)
us-gaap_TemporaryEquityNetIncome
Foreign currency translation
us-gaap_TemporaryEquityForeignCurrencyTranslationAdjustments
us-gaap_AccountsReceivableGross
Accounts Receivable, before Allowance for Credit Loss
Net income
us-gaap_ProfitLoss
Net income
us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Total comprehensive income
Schedule of Consideration Transferred for Business Acquisitions [Table Text Block]
Tabular disclosure of consideration transferred for business acquisitions.
Changes in fair value
Other noncash charges
Amount of gain (loss) from change in fair value of contingent consideration from business combination.
ecobee Inc. [Member]
Represents ecobee Inc..
Net income
Derivative Instrument [Axis]
Derivative Contract [Domain]
Additional contingent consideration (1)
Represents additional contingent consideration.
Redeemable Noncontrolling Interest [Member]
Information pertaining to redeemable noncontrolling interest.
Provision for income taxes
Provision for income taxes
us-gaap_OperatingExpenses
Total operating expenses
us-gaap_DefinedContributionPlanCostRecognized
Defined Contribution Plan, Cost
General and administrative
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Cash and cash equivalents
Other Term Loan Facility [Member]
Other term loans provides borrowers with a lump sum of cash upfront in exchange for specific borrowing terms.
Amendment Flag
City Area Code
Use of Estimates, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Patents and Securites [Member]
Represents patents and securities lawsuits.
gnrc_SharesAcquiredUnderStockRepurchasesProgramShares
Shares Acquired Under Stock Repurchases Program, Shares (in shares)
Number of shares that have been repurchased during the period and are being held in treasury
Uncertain tax positions reserve
Represents the percentage of uncertain tax position reserves related to effective income tax rate reconciliation.
Current Fiscal Year End Date
Document Fiscal Period Focus
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Document Period End Date
Aaron Jagdfeld [Member]
Represents Aaron Jagdfeld.
Entity File Number
Entity Emerging Growth Company
us-gaap_WriteOffOfDeferredDebtIssuanceCost
Write off of Deferred Debt Issuance Cost
Document Type
Loss on extinguishment of debt
Gain (Loss) on Extinguishment of Debt, Total
Loss on extinguishment of debt
The 2023 Acquistions [Member]
Represents the 2023 acquisitions.
Entity Small Business
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
Entity Public Float
Entity Filer Category
Entity Current Reporting Status
Entity Voluntary Filers
Acquisition related costs
Business Combination, Acquisition Related Costs
Entity Well-known Seasoned Issuer
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.
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
Entity Tax Identification Number
Entity Central Index Key
Entity Registrant Name
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
Amortization of intangible assets
Amortization of intangibles
Amortization of Intangible Assets
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Address, City or Town
Geographic Concentration Risk [Member]
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Entity Address, State or Province
Concentration Risk Type [Axis]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Domain]
us-gaap_AllowanceForDoubtfulAccountsReceivable
Accounts Receivable, Allowance for Credit Loss
Balance
Balance
Material Terms of Trading Arrangement [Text Block]
ecd_TrdArrIndTitle
Trading Arrangement, Individual Title
ecd_TrdArrIndName
Trading Arrangement, Individual Name
ecd_TrdArrSecuritiesAggAvailAmt
Trading Arrangement, Securities Aggregate Available Amount
Entity Common Stock, Shares Outstanding
ecd_TrdArrAdoptionDate
Trading Arrangement Adoption Date
us-gaap_AdvertisingExpense
Advertising Expense
Revenue Benchmark [Member]
Accounts Receivable [Member]
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Local Phone Number
us-gaap_TableTextBlock
Notes Tables
us-gaap_GainLossOnDispositionOfAssets1
Gain on disposal of assets
Provision for credit losses (1)
Accounts Receivable, Credit Loss Expense (Reversal)
Selling and service
Raw material
Currency translation
Amount of increase (decrease) in allowance for credit loss on accounts receivable, from currency translation.
Finished goods
Work-in-process
Research and development
Research and Development Expense
us-gaap_InterestExpense
Interest expense
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Subsequent Event [Member]
Schedule of Inventory, Current [Table Text Block]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Other intangible assets, net
Retirement Benefits [Text Block]
Total intangible assets, gross
us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
Deferred Compensation Arrangement with Individual, Compensation Expense
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Fair Value of Financial Instruments, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Finite-Lived Intangible Asset, Expected Amortization, Year Three
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Finite-Lived Intangible Asset, Expected Amortization, Year Four
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Finite-Lived Intangible Asset, Expected Amortization, Year Five
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Finite-Lived Intangible Asset, Expected Amortization, Year One
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
Consumer Product Safety Commission [Member]
Represents consumer product safety commission.
gnrc_SettlementAgreementCivilFinePayments
Settlement Agreement, Civil Fine Payments
Represents civil fine payments for settlement payment.
Finite-lived intangible assets, useful life (Year)
Operating expenses:
Income Tax, Policy [Policy Text Block]
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term (Year)
Research and Development Expense, Policy [Policy Text Block]
us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
Advertising Cost [Policy Text Block]
Revenue from Contract with Customer [Policy Text Block]
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance
us-gaap_DeferredTaxAssetsNet
Total deferred tax assets
Debt, Policy [Policy Text Block]
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Other deferred tax assets
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Inventories
Total
Capitalized R&D
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Gain (Loss), Foreign Currency Transaction, before Tax
Deferred Income
us-gaap_DeferredTaxAssetsInventory
Inventories
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]
Accrued expenses
Property and equipment, estimated useful lives (Year)
Construction in Progress [Member]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Bad debt
Accounts receivable, allowance for doubtful accounts
Accounts receivable, less allowance for credit losses of $33,925 and $27,664 at December 31, 2023 and 2022, respectively
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Stock-based compensation
Building and Building Improvements [Member]
Land and Land Improvements [Member]
Land Improvements [Member]
Leasehold Improvements [Member]
Property, Plant and Equipment, Policy [Policy Text Block]
Board of Directors Chairman [Member]
Other, net
Long-Lived Tangible Asset [Axis]
us-gaap_NonoperatingIncomeExpense
Total other expense, net
Segment Reporting Disclosure [Text Block]
Long-Lived Tangible Asset [Domain]
Operating loss and credit carryforwards
Current assets:
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Inventory, Policy [Policy Text Block]
Effect of exchange rate changes on cash and cash equivalents
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase (decrease) in cash and cash equivalents
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash (used in) provided by financing activities
Investment income
Operating income
Income from operations
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Other (expense) income:
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_DeferredTaxLiabilities
Net deferred tax liabilities
Goodwill and intangible assets
Gross profit
Gross profit
Base Rate [Member]
Costs of goods sold
Derivatives, Policy [Policy Text Block]
Debt refinancing costs
Interest swap and derivative
us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities
Payment for Contingent Consideration Liability, Financing Activities
Payment of contingent acquisition consideration
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Payment, Tax Withholding, Share-Based Payment Arrangement
Taxes paid related to equity awards
Depreciation
Prepaid expenses
us-gaap_PaymentsOfDividendsCommonStock
Cash dividends paid to noncontrolling interest of subsidiary
Pro Forma [Member]
us-gaap_PaymentsForRepurchaseOfCommonStock
Payments for Repurchase of Common Stock
Stock repurchases
Scenario [Domain]
Proceeds from the exercise of stock options
Proceeds from Stock Options Exercised
Total sales
Net sales
Title of Individual [Domain]
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
State
Title of Individual [Axis]
State
Scenario [Axis]
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
Foreign
us-gaap_CurrentFederalTaxExpenseBenefit
Federal
Federal
Deferred:
Current:
us-gaap_CurrentIncomeTaxExpenseBenefit
Current Income Tax Expense (Benefit)
Revenue performance period (Year)
Revenue performance obligation
Global intangible low tax income
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest
Payments for Repurchase of Redeemable Noncontrolling Interest
Purchase of additional ownership interest
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before provision for income taxes
Income before provision for income taxes
us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
ICFR Auditor Attestation Flag
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Comprehensive Income (Loss) Note [Text Block]
Other comprehensive income (loss):
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
us-gaap_PaymentsOfDebtIssuanceCosts
Payment of debt issuance costs
Disaggregation of Revenue [Table Text Block]
us-gaap_RepaymentsOfLongTermDebt
Repayments of Long-Term Debt, Total
us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Repayments of long-term borrowings and finance lease obligations
Cash and Cash Equivalents, Policy [Policy Text Block]
Receivable [Policy Text Block]
us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefit, beginning of period
Unrecognized tax benefit, end of period
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Statute of limitation expirations
us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Settlements
Increase in unrecognized tax benefit for positions taken in prior period
Increase in unrecognized tax benefit for positions taken in current period
us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Charge-offs
Proceeds from long-term borrowings
us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense
Unrecognized Tax Benefits, Income Tax Penalties Expense
us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Unrecognized Tax Benefits, Interest on Income Taxes Expense
us-gaap_ProceedsFromLongTermLinesOfCredit
Proceeds from Long-term Lines of Credit
Auditor Name
Auditor Firm ID
Common stock issued under equity incentive plans, net of 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.
Auditor Location
Excess Purchase Price over Predecessor Basis [Member]
The excess purchase price over predecessor basis.
us-gaap_RepaymentsOfShortTermDebt
Repayments of short-term borrowings
Common stock issued under equity incentive plans, net of 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.
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Weighted average common shares outstanding - diluted: (in shares)
Diluted shares (in shares)
Proceeds from short-term borrowings
Statement of Financial Position [Abstract]
Net income attributable to common shareholders per common share - diluted: (in dollars per share)
As reported (in dollars per share)
Net income attributable to Generac Holdings Inc. per common share - diluted: (in dollars per share)
us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent
Share-based compensation
Weighted average common shares outstanding - basic: (in shares)
Weighted average shares, basic (in shares)
Other
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective tax rate
Business Acquisition [Axis]
Net income attributable to common shareholders per common share - basic: (in dollars per share)
us-gaap_EarningsPerShareBasic
Net income attributable to Generac Holdings Inc. per common share - basic: (in dollars per share)
gnrc_NumberOfMajorCustomers
Number of Major Customers
Represents number of major customers that accounts for 10 percent or more of the entity's revenues.
Business Acquisition, Acquiree [Domain]
gnrc_AmortizationOfFinancingCostsAndDebtDiscountPremium
Amortization of Financing Costs and Debt Discount Premium
Amount of non-cash expense included in interest expense to issue and amortize debt discount and obtain financing associated with the related debt instruments.
Statement of Cash Flows [Abstract]
gnrc_DeferredCostsAmortizationExpenseYearTwo
Deferred Costs Amortization Expense, Year Two
Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for deferred costs.
gnrc_DeferredCostsAmortizationExpenseNextTwelveMonths
Deferred Costs Amortization Expense, Next Twelve Months
Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for deferred costs.
gnrc_DeferredCostsAmortizationExpenseYearFour
Deferred Costs Amortization Expense, Year Four
Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for deferred costs.
Statement of Stockholders' Equity [Abstract]
gnrc_DeferredCostsAmortizationExpenseYearThree
Deferred Costs Amortization Expense, Year Three
Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for deferred costs.
gnrc_DeferredCostsAmortizationExpenseYearFive
Deferred Costs Amortization Expense, Year Five
Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for deferred costs.
Quarterly Financial Information [Table Text Block]
Interest on lease liabilities
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Property Plant and Equipment, Estimated Useful Lives [Table Text Block]
Tabular disclosure for the useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale.
us-gaap_FinanceLeaseLiabilityPaymentsDue
Total minimum lease payments, finance leases
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Amortization of ROU assets
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive
2028, finance lease
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive
After 2023, finance leases
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Payment of acquisition contingent consideration (in shares)
Number of shares of treasury stock issued during period for contingent consideration.
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Interest component
Payment of acquisition contingent consideration
Value of treasury stock issued for contingent consideration during period.
gnrc_ContingentConsiderationSharePaymentsValue
Contingent Consideration, Share Payments, Value
Represents the monetary amount of share payments for contingent consideration.
Power Home Solar, LLC Against Generac Power Systems, Inc. [Member]
Power Home Solar, LLC Against Generac Power Systems, Inc..
us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
2024, finance lease
us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo
2025, finance lease
us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree
2026, finance lease
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour
2027, finance lease
Nondeductible U.S. compensation
Provision for legal, regulatory, and clean energy product charges (6)
Provision for Product Charges
Represents a specific credit loss provision for a clean energy product customer that filed for bankruptcy, as well as a warranty provision to address certain clean energy product warranty-related matters
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Business Combination, Step Acquisition, Equity Interest in Acquiree, including Subsequent Acquisition, Percentage, Total
Finance Leases
gnrc_ContingentConsiderationSharePaymentShares
Contingent Consideration, Share Payment, Shares (in shares)
Represents the amount of shares in a share payment for contingent consideration.
State taxes
Captiva Energy Solutions [Member]
Represents information about Captiva Energy Solutions.
The 2022 Acquisitions [Member]
Relating to the 2022 acquisitions.
The 2019 Equity Incentive Plan [Member]
Information related to the 2019 Equity Incentive Plan.
Accrued wages and employee benefits
gnrc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedWagesAndEmployeeBenefits
Amount of accrued wages and employee benefits due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Research and development credits
Finance Leases (Year)
gnrc_SecuredLeverageRatio
Secured Leverage Ratio
Ratio used to calculate financial leverage and the ability to meet financial obligations. If the borrower's actual secured leverage ratio is below the 3.75 threshold for the annual period, the Excess Cash Flow payment requirement for that period is eliminated.
Financing activities
U.S. statutory rate
Change in valuation allowance
gnrc_ContingentConsiderationPayments
Payment of contingent consideration (2)
Amount of contingent consideration paid during period, including equity issued as payment.
Patents and technology, net
Represents the carrying amount of finite-lived patents and technology as of balance sheet date.
State tax rate differential
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit)
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Net assets acquired
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Payments to Acquire Businesses, Net of Cash Acquired
Acquisition of businesses, net of cash acquired
Other long-term liabilities
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
Long-term debt
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
us-gaap_PaymentsToAcquireEquityMethodInvestments
Contribution to tax equity investment
Class of Stock [Axis]
Clean Energy Product [Member]
Relating to Clean Energy Product.
Deferred income taxes liability
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Cash paid at closing
Payments to Acquire Businesses, Gross
Current portion of long-term borrowings and finance lease obligations
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt
Other accrued liabilities
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
Domestic [Member]
Represents information regarding domestic reportable segment.
Accounts payable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
Deferred income taxes
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets
Property and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
International [Member]
Represents information regarding international reportable segment.
Other assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
Intangible assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Schedule Of Intangible Assets [Table Text Block]
Tabular disclosure of intangible assets, by major asset class.
Not Designated as Hedging Instrument [Member]
Proceeds from beneficial interest in securitization transactions
Prepaid expenses and other current assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
Accounts receivable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Income Tax Disclosure [Text Block]
Hedging Designation [Axis]
gnrc_AdjustedEBITDA
Total adjusted EBITDA
Represents net income before interest expense, taxes, depreciation and amortization, as further adjusted for other non-cash items
Hedging Designation [Domain]
Inventories
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Schedule of Maturities of Long-Term Debt [Table Text Block]
Intersegment Sales [Member]
Represents intersegment sales.
External Net Sales [Member]
Represents external net sales.
gnrc_BusinessOptimizationExpense
Business optimization and other charges
Represents charges relating to business optimization and restructuring costs.
gnrc_Other
Other
Represents other non-cash items that are not categorized separately.
Common stock issued at closing
gnrc_TransactionCostsAndCredityFaciltyFees
Transaction costs and credit facility fees
Represents transaction costs incurred directly in connection with any investment, as defined in our credit agreement; equity issuance, debt issuance or refinancing; together with certain fees relating to our senior secured credit facilities.
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred, Total
Total purchase price
gnrc_NoncashWritedownAndOtherAdjustments
Non-cash write-down and other adjustments
Represents information about non-cash write-down and other adjustments. Includes gains/losses on disposal of assets, unrealized mark-to-market adjustments on commodity contracts, and certain foreign currency and purchase accounting related adjustments.
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Contingent consideration (2)
Business Combination, Consideration Transferred, Liabilities Incurred
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Business Acquisition, Percentage of Voting Interests Acquired
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
us-gaap_GoodwillAndIntangibleAssetImpairment
Goodwill and Intangible Asset Impairment, Total
gnrc_PerformanceShareAwardPercentage
Performance Share Award, Percentage
The percentage of the target performance share award.
gnrc_InterestCoverageRatio
Interest Coverage Ratio
Amount of interest coverage ratio.
gnrc_CovenantMinimumInterestCoverageRatio
Covenant Minimum Interest Coverage Ratio
The minimum interest coverage ratio required under the covenant.
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block]
us-gaap_PaymentsToAcquireLongtermInvestments
Purchase of long-term investments
Proceeds from sale of investment
Goodwill, gross
us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Accumulated impairment
Goodwill and Intangible Assets Disclosure [Text Block]
Schedule of Goodwill [Table 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.
Revolving Credit Facility [Member]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Credit Facility [Axis]
Proceeds from sale of property and equipment
Credit Facility [Domain]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Trade Names [Member]
us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares
Dilutive effect of contingently issued shares (in shares)
Capital expenditures
Expenditures for property and equipment
us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Dilutive effect of stock compensation awards (in shares)
Income taxes
Noncompete Agreements [Member]
Tranche A Term Loan Facility [Member]
Borrowing supported by a written promise to pay an obligation.
Supplemental disclosure of cash flow information
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.
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.
Other Long-term Liabilities [Member]
Represents other long-term liabilities.
Customer Lists [Member]
No Customer [Member]
Represents no customer.
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Acquisition Related Costs [Policy Text Block]
Disclosure of accounting policy for acquisition related costs.
Present value interest accretion
The amount of increase due to present value interest accretion in contingent consideration arrangements from business combinations.
Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]
Acquisition of Chilicon [Member]
Represents acquisition of chilicon.
gnrc_DeferredIncomeTaxExpenseBenefitBeforeAdjustmentOfValuationAllowance
Deferred Income Tax Expense (Benefit) Before Adjustment of Valuation Allowance
The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations before adjustment of change in valuation allowance.
gnrc_TaxCreditCarryforwardStateManufacturing
Tax Credit Carryforward State Manufacturing
The amount of the state manufacturing tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.
All Acquisitions [Member]
Represents all acquisitions.
As reported
Net income attributable to Generac Holdings Inc.
Net income attributable to Generac Holdings Inc.
gnrc_DefinedContributionPlanPercentageOfEligibleCompensation
Defined Contribution Plan Percentage of Eligible Compensation
Percentage of eligible compensation of employees under defined contribution plan.
gnrc_EmployerContributionUnderMedicalAndDentalPlan
Employer Contribution under Medical and Dental Plan
Contribution made under medical and dental plan made by the employer.
Restricted Stock [Member]
Foreign tax deduction
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax deduction.
Foreign deferred tax rate change
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to foreign deferred tax rate change.
Performance Shares [Member]
Other Accrued Liabilities and Finance Lease and Other Long-term Liabilities [Member]
Represents Other Accrued Liabilities and Finance Lease and Other Long-term Liabilities.
Share-Based Payment Arrangement, Option [Member]
Foreign currency translation
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
us-gaap_GoodwillAcquiredDuringPeriod
Acquisitions of businesses, net
Finance Lease and Other Long-term Liabilities [Member]
Represents Finance Lease and Other Long-term Liabilities.
Finance Lease and Other Assets [Member]
Represents Finance Lease and Other Assets.
Lessee, Operating Leases and Finance Leases [Text Block]
The entire disclosure for operating leases and finance leases of lessee.
State credits
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state tax credit.
Business Combination Disclosure [Text Block]
Long-Term Debt, Type [Axis]
Long-Term Debt, Type [Domain]
Expected annual dividend per share (in dollars per share)
The estimated amount of dividends per share to be paid to holders of the underlying shares (expected dividends) over the option's term.
Investing activities
Valuation and Qualifying Accounts [Table Text Block]
A tabular disclosure of allowance and reserve accounts including their beginning and ending balances, as well as a reconciliation by type of activity during the period. Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements.
Earnings Per Share [Text Block]
EEC and Blue Pillar [Member]
Related to EEC and Blue Pillar
Intersegment Eliminations [Member]
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_IncreaseDecreaseInEmployeeRelatedLiabilities
Accrued wages and employee benefits
us-gaap_IncreaseDecreaseInOtherAccruedLiabilities
Other accrued liabilities
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.
Unrealized gain (loss) on interest rate swaps, tax
SEC Schedule, 12-09, Reserve, Inventory [Member]
us-gaap_IncreaseDecreaseInAccountsPayable
Accounts payable
Depreciation and Amortization
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.
Reserves Assumed in Acquisition
Amount of increase (decrease) in valuation and qualifying accounts and reserves from business combination.
gnrc_ExcessPurchasePriceOverPredecessorBasis
Excess purchase price over predecessor basis
The element that represents the excess purchase price over predecessor basis.
Other Accrued Liabilities [Member]
Related to other accrued liabilities.
Operating Lease and Other Assets [Member]
Related to operating lease and other assets.
Operating Lease and Other Long-term Liabilities [Member]
Related to operating lease and other long-term liabilities.
Acquisition of Deep Sea [Member]
Represents information regarding the acquisition of Deep Sea. Headquartered in Hunmanby, United Kingdom, Deep Sea is a designer and manufacturer of a diverse suite of controller products that provide flexible solutions for multiple applications including generators, automatic transfer switches, battery charging, and off-highway vehicles.
The 2021 Acquisitions [Member]
Represents information regarding one or more acquisitions occurring in the year 2021.
gnrc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsIncludingGoodwill
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill
The amount of acquisition cost of a business combination allocated to an identifiable intangible asset including goodwill.
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
gnrc_NumberOfNewContractsEntered
Number of New Contracts Entered
Number of new contracts entered into during the period mentioned.
gnrc_LineOfCreditFacilityIncrementalCapacity
Line of Credit Facility, Incremental Capacity
Represents the incremental capacity under a line of credit facility.
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.
Other Accrued Liabilities and Operating Lease and Other Long-term Liabilities [Member]
Primary financial statement caption encompassing other accrued liabilities and operating lease and other long-term liabilities.
Schedule Of Derivative Assets (Liabilities) at Fair Value [Table Text Block]
Tabular disclosure of derivative assets and liabilities at fair value.
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive income attributable to Generac Holdings Inc.
Treasury stock issued for business combination (in shares)
us-gaap_TreasuryStockSharesAcquired
Treasury Stock, Shares, Acquired (in shares)
Stock repurchases (in shares)
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Short-term borrowings
gnrc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShorttermBorrowings
Amount of short-term borrowing expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.
us-gaap_IncreaseDecreaseInOtherOperatingAssets
Other assets
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
us-gaap_LeaseCost
Total lease cost
Acquisition of Off Grid Energy [Member]
Represents acquisition of Off Grid Energy.
Other 2021 Acquisitions [Member]
Represents other acquisitions in 2021.
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
us-gaap_DebtInstrumentFairValue
Debt Instrument, Fair Value Disclosure
Operating Leases
Operating lease cost
Lease, Cost [Table Text Block]
Finance leases
All Other 2021 Acquisitions [Member]
Represents all other acquisitions in 2021 except for Deep Sea.
Operating leases
Operating Leases (Year)
us-gaap_DebtInstrumentFeeAmount
Debt Instrument, Fee Amount
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Variable Rate [Domain]
Schedule of Long-Term Debt Instruments [Table Text Block]
Variable Rate [Axis]
us-gaap_CapitalizedContractCostAmortization
Capitalized Contract Cost, Amortization
Residential Power Products [Member]
Represents products and services related to residential power.
Deferred cash payment (1)
The deferred cash outflow associated with the acquisition of business during the period.
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Share-based compensation
Quarterly Financial Information [Text Block]
Contingent Consideration Liability [Member]
Represents contingent consideration liabilities.
Commercial and Industrial Power Products [Member]
Represents products and services related to commercial and industrial power.
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Other Products and Services [Member]
Represents information pertaining to products and services not separately disclosed.
us-gaap_TreasuryStockValueAcquiredCostMethod
Treasury Stock, Value, Acquired, Cost Method
Stock repurchases
Dies and Tools [Member]
Tangible personal property used to produce goods and services.
us-gaap_TreasuryStockCommonValue
Treasury stock, at cost, 13,057,298 and 11,284,350 shares at December 31, 2023 and 2022, respectively
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.
Treasury stock issued for business combination
Product Warranty Obligations Included In Consolidated Balance Sheet [Table Text Block]
Product warranty obligations included in consolidated balance sheet.
us-gaap_IncreaseDecreaseInInventories
Inventories
Common stock issued for business combination (in shares)
Common stock issued for business combination
gnrc_UncommittedIncrementalTermLoanFacility
Uncommitted Incremental Term Loan Facility
Refers to uncommitted incremental term loan facility after amendment.
us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Line of Credit Facility, Remaining Borrowing Capacity
us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Exercised, number of options (in shares)
Term Loan [Member]
Credit facility arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer.
LIBOR Floor Rate [Member]
Floor interest rate at which a bank borrows funds from other banks in the London interbank market.
Adjusted LIBOR Rate [Member]
Adjusted interest rate at which a bank borrows funds from other banks in the London interbank market, plus an applicable margin.
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Line of Credit Facility, Current Borrowing Capacity
ABL Revolving Credit Facility [Member]
Arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount.
Granted, number of options (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Forfeited, number of options (in shares)
gnrc_AmountFinancedByDealers
Amount Financed by Dealers
Amount financed by dealers to purchase goods from the entity.
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Fair value of Contingent Consideration in a Business Combination [Policy Text Block]
Disclosure for the accounting policy for the fair value of contingent consideration in a business combination.
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders’ equity
gnrc_ProformaAmortizationOfIntangibleAssets
Proforma Amortization of Intangible Assets
The amount of proforma amortization of intangible assets.
Current Portion of Long-term Borrowings and Finance Lease Obligations [Member]
Related to current portion of long-term borrowings and finance lease obligations.
UNITED STATES
gnrc_VauationAllowancesAndReservesAdjustments
Vauation Allowances and Reserves Adjustments
The amount of valuation allowances and reserves adjustments to income tax deferred tax amounts.
Retained earnings
Accumulated other comprehensive loss
Debt Disclosure [Text Block]
Case Nos. 21-cv-00428-ADA and 20-cv-00078-ADA [Member]
Represents Case Nos. 21-cv-00428-ADA and 20-cv-00078-ADA.
Mean Green [Member]
Represents Mean Green.
Net changes in operating assets and liabilities, net of acquisitions:
gnrc_DeferredCompensationArrangementWithIndividualSharesGranted
Deferred Compensation Arrangement with Individual, Shares Granted (in shares)
The number of shares granted in a deferred compensation arrangement with an individual.
Operating lease liabilities - noncurrent
Total operating lease liabilities
Present value of minimum lease payments, operating leases
Operating lease liabilities - current
Less: current portion of finance lease obligation
Finance lease liabilities - noncurrent
Operating lease ROU assets
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total minimum lease payments, operating leases
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Interest component
Finance lease obligation
Present value of minimum lease payments, finance leases
Financing cash flows - finance leases
us-gaap_DeferredIncomeTaxExpenseBenefit
Deferred income taxes
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2026, operating lease
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2027, operating lease
us-gaap_FinanceLeaseRightOfUseAsset
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
Finance lease ROU assets, net
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
2028, operating lease
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
After 2023, operating leases
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2024, operating lease
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2025, operating lease
Equity Incentive Plan (Plan) [Member]
Represents the equity incentive plan (Plan).
us-gaap_ShareBasedCompensation
Share-based compensation expense
Non-cash share-based compensation expense
Amortization of original issue discount and deferred financing costs
Depreciation
us-gaap_Depreciation
Depreciation
us-gaap_DepreciationDepletionAndAmortization
Depreciation and amortization
gnrc_BusinessAcquisitionNoncontrollingInterestTermOfPutOption
Business Acquisition, Noncontrolling Interest, Term of Put Option (Year)
The term of a put option available to the noncontrolling interest of a business acquired by the reporting entity.
Treasury Stock, Common, Shares
Common stock, par value $0.01, 500,000,000 shares authorized, 73,195,055 and 72,701,257 shares issued at December 31, 2023 and 2022, respectively
Adjustments to reconcile net income to net cash provided by operating activities:
gnrc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill
Total assets acquired
Represents the total assets acquired from a business combination which includes identifiable assets acquired and liabilities assumed assets, including goodwill.
Common stock, shares authorized (in shares)
Common stock, shares issued (in shares)
Redeemable Noncontrolling Interest [Text Block]
Entire disclosure for redeemable noncontrolling interest.
Established for acquisitions
Represents increase in allowance for doubtful accounts receivable from Establishment for Acquisitions
Common stock, par value (in dollars per share)
gnrc_ExtendedWarrantyTerm
Extended Warranty Term (Year)
Expiration period of the extended warranty.
Statistical Measurement [Domain]
Operating cash flows - operating leases
Maximum [Member]
Minimum [Member]
Ownership [Domain]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Operating cash flows - finance leases
Litigation Case [Axis]
Litigation Case [Domain]
Ownership [Axis]
Interest
Savings Plan 401(k) [Member]
Represents the companies defined-contribution 401(k) savings plan.
Geographical [Axis]
Geographical [Domain]
Property, Plant and Equipment [Table Text Block]
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
Customer [Domain]
Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy and NAV [Axis]
us-gaap_ExtendedProductWarrantyAccrual
Total
Balance at beginning of period
Balance at end of period
Patents and Technology [Member]
Represents finite-lived intangible assets classified as patents and technology.
us-gaap_ExtendedProductWarrantyAccrualCurrent
Current portion - other accrued liabilities
us-gaap_ExtendedProductWarrantyAccrualNoncurrent
Long-term portion - Deferred revenue
Noncontrolling interests
Operating activities
Deferred revenue contracts issued
Statement [Line Items]
Current portion - Accrued product warranty
Long-term portion - other long-term liabilities
us-gaap_StandardProductWarrantyAccrual
Total
Balance at beginning of period
Balance at end of period
us-gaap_StandardProductWarrantyAccrualPayments
Payments
Additional paid-in capital
Product warranty reserve assumed in acquisition
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Provision for warranty issued
AOCI Attributable to Parent [Member]
Changes in estimates for pre-existing warranties (1)
Schedule of Product Warranty Liability [Table Text Block]
Stockholders’ equity:
Product Warranty Disclosure [Text Block]
Redeemable noncontrolling interest
gnrc_TotalLeverageRatio
Total Leverage Ratio
Financial Condition Covenant applicable to Tranche A Term Loan Facility and Revolving Facility only.
us-gaap_Liabilities
Total liabilities
gnrc_CovenantMaximumTotalLeverageRatio
Covenant Maximum Total Leverage Ratio
The maximum financial condition covenant applicable to Tranche A Term Loan Facility and Revolving Facility only.
us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Contract with Customer, Liability, Revenue Recognized
Prepaid expenses and other assets
Counterparty Name [Axis]
Counterparty Name [Domain]
Deferred income taxes
us-gaap_DeferredIncomeTaxLiabilitiesNet
Deferred Income Tax Liabilities, Net
Consolidation Items [Domain]
us-gaap_ContractWithCustomerLiability
Contract with Customer, Liability
Consolidation Items [Axis]
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.
Schedule of Components of Lease Assets and Liabilities [Table Text Block]
Tabular disclosure of components of lease assets and liabilities.
gnrc_LesseeOperatingLeaseAndFinanceLeaseRemainingTermOfContract
Lessee, Operating Lease and Finance Lease, Remaining Term of Contract (Year)
Remaining term of lessee's operating lease and finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
Schedule of Leases Cash Flow Information [Table Text Block]
Tabular disclosure of leases related to cash flow information.
gnrc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation
Accumulated depreciation - finance lease ROU assets
Amount of accumulated depreciation for finance lease right of use assets.
Finance lease ROU assets, gross
Gross amount of lessee's right to use underlying asset under finance lease.
Operating and Finance Lease, Liability, Maturity [Table Text Block]
Tabular disclosure of undiscounted cash flows of operating and finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating and finance lease liability recognized in statement of financial position.
Restricted Stock and Performance Shares [Member]
Represents information about restricted stock and performance shares.
Lease, Term and Discount Rate [Table Text Block]
Tabular disclosure of term and discount rate of lease.
Noncontrolling Interest [Member]
Retained Earnings [Member]
us-gaap_TreasuryStockAcquiredAverageCostPerShare
Shares Acquired, Average Cost Per Share (in dollars per share)
Treasury Stock, Common [Member]
us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Stock Repurchase Program, Remaining Authorized Repurchase Amount
us-gaap_StockRepurchaseProgramPeriodInForce1
Stock Repurchase Program, Period in Force (Year)
Additional Paid-in Capital [Member]
Share Repurchase Program [Domain]
Parent [Member]
Common Stock [Member]
us-gaap_StockRepurchaseProgramAuthorizedAmount1
Stock Repurchase Program, Authorized Amount
Other
us-gaap_OtherBorrowings
Equity Components [Axis]
us-gaap_DebtAndCapitalLeaseObligations
Total
Equity Component [Domain]
Share Repurchase Program [Axis]
us-gaap_LongTermDebt
Long-Term Debt
us-gaap_LineOfCredit
Long-Term Line of Credit
us-gaap_DeferredFinanceCostsNet
Debt Issuance Costs, Net, Total
Vehicles [Member]
gnrc_ExcessTaxBenefitsFromEquityAwards
Excess tax benefits from equity awards
The value of excess tax benefits from equity awards.
Office Equipment [Member]
Document Annual Report
Machinery and Equipment [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
us-gaap_DebtInstrumentUnamortizedDiscount
Original issue discount and deferred financing costs
Entity Incorporation, State or Country Code
Term Loan
Document Transition Report
Document Financial Statement Error Correction [Flag]
Short-term borrowings
Short-Term Debt
Entity Interactive Data Current
Security Exchange Name
Title of 12(b) Security
Long-term borrowings and finance lease obligations
Total long-term borrowings and finance lease obligations
Cost of Sales [Member]
All Individuals [Member]
Charges to Reserve, Net
us-gaap_ValuationAllowancesAndReservesBalance
Beginning
Additions Charged to Earnings
Income Statement Location [Axis]
Allowance for credit losses
Income Statement Location [Domain]
Individual [Axis]
us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners
Redemption value adjustment
Redeemable noncontrolling interest redemption value adjustment
Segments [Axis]
Segments [Domain]
us-gaap_RedeemableNoncontrollingInterestEquityFairValue
Redeemable Noncontrolling Interest, Equity, Fair Value, Total
Redeemable Noncontrolling Interest [Table Text Block]
gnrc_StandardProductWarrantyAccrualWarrantyProvision
Standard Product Warranty Accrual, Warranty Provision
The amount of warranty provision for standard product warranty accrual.
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Statement [Table]
Income Statement [Abstract]
2026
2027
2028
us-gaap_BusinessCombinationContingentConsiderationLiability
Business Combination, Contingent Consideration, Liability
Beginning balance, January 1, 2023
Ending balance, December 31, 2023
2024
2025
Fair Value of Derivatives
Deferred revenue
us-gaap_StockholdersEquity
Stockholders’ equity attributable to Generac Holdings Inc.
Total
Net unrealized (loss) gain on derivatives
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Interest Rate Swap [Member]
Operating Segments [Member]
ecd_TradingArrByIndTable
Trading Arrangements, by Individual [Table]