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Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Definedcontributionemployeeautomaticcontributionpercentag Definedcontributionemployeeautomaticcontributionpercentag Employee automatic contribution percentage Prepaid expenses and other long-term assets Increase (Decrease) in Prepaid Expense and Other Assets Amortization expense Intangible Asset, Finite-Lived, Amortization Expense Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Intangible Asset, Finite-Lived [Line Items] Intangible Asset, Finite-Lived [Line Items] AAON-branded Products AAON Products [Member] AAON Products Lease Contractual Term [Domain] Lease Contractual Term [Domain] Adjustments to reconcile net income to net cash provided by (used in) operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) 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No documentation exists for this element. -- Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Research and development tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Allowance for credit losses: Accounts Receivable, Allowance for Credit Loss [Roll Forward] Options vested and exercisable weighted average exercise price (in dollars per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price Accounts Receivable (Allowance) Accounts Receivable (Allowance) [Table Text Block] Tabular disclosure of activity in the allowance for doubtful accounts receivable account. Total Share-Based Payment Arrangement, Expense, Tax Benefit Aggregate price of shares repurchased since inception Treasury Stock, Value, Acquired, Cost Method Medical self-insurance Self Insurance Reserve, Current Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Exercised (weighted average exercise price) (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash, cash equivalents, and restricted cash, beginning of period Cash, cash equivalents, and restricted cash, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Accounts payable Increase (Decrease) in Accounts Payable Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Share-based compensation Share-Based Payment Arrangement, Noncash Expense Employee profit sharing bonus plan Labor and Related Expense Options vested and exercisable weighted average remaining contractual life Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted-Average Remaining Contractual Term 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Tax Period [Axis] Tax Period [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Payments to affiliates Related Party Transaction, Amounts of Transaction Gain on disposal of assets Gain on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Inventories Schedule of Inventory, Current [Table Text Block] Leases Lessee, Operating Leases [Text Block] Basic (usd per share) Earnings Per Share, Basic BASX-branded Products BASX Products [Member] BASX Products Raw materials Inventory, Raw Materials, Gross Intellectual property Intellectual Property [Member] Contract liabilities Contract with Customer, Liability, Current Total current assets Assets, Current Estimated earnings Contract With Customer, Asset, Estimated Earnings Contract With Customer, Asset, Estimated Earnings Range [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Medical premium payments Defined Benefit Plan, Medical Claim Payments Defined Benefit Plan, Medical Claim Payments Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net Total, net Due from affiliates Accounts Receivable, after Allowance for Credit Loss, Current Schedule of Class of Treasury Stock Class of Treasury Stock [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Applicable margin Debt Instrument, Applicable Margin Debt Instrument, Applicable Margin Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Changes in valuation allowance Effective Income Tax Rate Reconciliation, Amended Returns, Amount Effective Income Tax Rate Reconciliation, Amended Returns, Amount Amortization of right of use assets Accounts Receivable, Credit Loss, Net Of Adjustments Accounts Receivable, Credit Loss, Net Of Adjustments Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and stockholders' equity Liabilities and Equity Intangible assets, net and goodwill Intangible Asset, Including Goodwill, after Accumulated Amortization Definite-Lived Intangible Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Options Share-Based Payment Arrangement, Option [Member] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Plan Name [Axis] Plan Name [Axis] Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Acquisition of intangible assets Payments to Acquire Intangible Assets Other income (expense), net Other Nonoperating Income (Expense) 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Income tax receivable Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period 2016 Long-Term Incentive Plan 2016 Long-Term Incentive Plan [Member] 2016 Long-Term Incentive Plan [Member] Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Redmond, Oregon Redmond, Oregon [Member] Redmond, Oregon Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Profits sharing, percent of pre-tax profit paid to eligible employees on quarterly basis Profit Sharing, Percent of Pre-tax Profit Paid to Eligible Employees on Quarterly Basis Profit Sharing, Percent of Pre-tax Profit Paid to Eligible Employees on Quarterly Basis Schedule of Property, Plant and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Capitalized internal-use software Capitalized Internal-Use Software [Member] Capitalized Internal-Use Software Capital expenditures Payments to Acquire Machinery and Equipment Office Space In Tulsa, OK Office Space In Tulsa, OK [Member] Office Space In Tulsa, OK Share Repurchase Program [Axis] Share Repurchase Program [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Contractual obligation, to be paid, year one Contractual Obligation, to be Paid, Year One Triggering Event [Domain] Triggering Event [Domain] [Domain] for Triggering Event [Axis] Credit Facility [Axis] Credit Facility [Axis] Internal-use software projects in process Capitalized Cost, Software to be Sold, Leased, or Marketed, before Accumulated Amortization Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Indiana INDIANA Name Measure Name Administrative expenses Defined Contribution Plan, Administrative Expense Return to provision Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent Illinois ILLINOIS Income Taxes Income Tax Disclosure [Text Block] 13.95-27.58 Exercise Price Range 1 [Member] Exercise Price Range 1 [Member] Accounts payable Due to affiliates Accounts Payable, Current Pay vs Performance Disclosure [Line Items] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Grant proceeds received Proceeds From Government Grant Proceeds From Government Grant Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Donations and other Donations, Noncurrent Donations, Noncurrent Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Company Selected Measure Amount Company Selected Measure Amount Tax Period [Domain] Tax Period [Domain] Summary of Share-Based Compensation Expense Summary of Share-Based Compensation Expense [Table Text Block] Tabular disclosure of share based compensation related to options and restricted stock. Depreciation and amortization Depreciation, Depletion and Amortization Inventory, gross Inventory, Gross SOFR Secured Overnight Financing Rate (SOFR) [Member] Stock options exercised and restricted (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture 28.28-37.07 Exercise Price Range 2 [Member] Exercise Price Range 2 [Member] Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (weighted average grant date fair value) (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax provision Effective tax rate Income Tax Expense (Benefit) Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Loans and leases receivable Loans and Leases Receivable, Gross Share-Based Payment Arrangement, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Net income Net income Net Income (Loss) Attributable to Parent Open market 2010 Stock Repurchase Program [Member] 2010 Stock Repurchase Program [Member] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Proceeds from sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Share-Based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Restatement Determination Date: Restatement Determination Date [Axis] Stock options exercised Cash received from options exercised during period Proceeds from Stock Options Exercised Contract with Customer, Contract Asset, Contract Liability, and Receivable Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Contract assets Contract with Customer, Asset, before Allowance for Credit Loss Non-deductible executive compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Current Federal Current Federal Tax Expense (Benefit) General Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]