$AAON
AAON, INC. Stock $aaon

$aaon Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000082414221000030 Filed on February 25, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$116.7M	$122.6M	$113.5M
YoY Change	-4.79%	9.11%	0.5%
Cost Of Revenue	$82.80M	$86.50M	$86.09M
YoY Change	-4.28%	2.37%	7.47%
Gross Profit	$33.92M	$36.38M	$27.41M
YoY Change	-6.76%	30.65%	-16.51%
Gross Profit Margin	29.07%	29.68%	24.15%
Selling, General & Admin	$14.10M	$14.20M	$12.37M
YoY Change	-0.7%	32.43%	-2.31%
% of Gross Profit	41.56%	39.03%	45.14%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$6.600M	$5.200M	$5.800M
YoY Change	26.92%	8.33%	28.89%
% of Gross Profit	19.46%	14.29%	21.16%
Operating Expenses	$14.60M	$14.60M	$12.37M
YoY Change	0.0%	36.16%	-2.31%
Operating Profit	$19.32M	$21.78M	$15.03M
YoY Change	-11.29%	27.18%	-25.45%
Interest Expense	$0.00	$0.00	$0.00
YoY Change
% of Operating Profit	0.0%	0.0%	0.0%
Other Income/Expense, Net	$0.00	$0.00	-$7.000K
YoY Change		-100.0%	-240.0%
Pretax Income	$25.70M	$21.40M	$15.03M
YoY Change	20.09%	25.2%	-25.59%
Income Tax	$6.900M	$5.400M	$742.0K
% Of Pretax Income	26.85%	25.23%	4.94%
Net Earnings	$18.89M	$17.27M	$14.29M
YoY Change	9.37%	33.24%	-1.54%
Net Earnings / Revenue	16.19%	14.09%	12.59%
Basic Earnings Per Share	$0.36	$0.33	$0.27
Diluted Earnings Per Share	$0.35	$0.33	$0.26
COMMON SHARES
Basic Shares Outstanding	52.24M shares	52.10M shares	52.11M shares
Diluted Shares Outstanding			52.72M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$79.00M	$26.80M	$28.40M
YoY Change	194.78%	1240.0%	165.42%
Cash & Equivalents	$79.03M	$26.80M	$28.37M
Short-Term Investments
Other Short-Term Assets	$7.000M	$19.00M	$1.600M
YoY Change	-63.16%	1800.0%	23.08%
Inventory	$82.22M	$73.60M	$80.62M
Prepaid Expenses
Receivables	$47.39M	$67.40M	$56.08M
Other Receivables	$4.600M	$800.0K	$3.900M
Total Short-Term Assets	$220.3M	$187.5M	$170.3M
YoY Change	17.44%	33.34%	17.86%
LONG-TERM ASSETS
Property, Plant & Equipment	$223.3M	$178.1M	$175.7M
YoY Change	25.41%	9.26%	6.58%
Goodwill	$3.229M	$3.229M	$3.229M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$38.00K
YoY Change
Long-Term Investments
YoY Change
Other Assets	$579.0K
YoY Change
Total Long-Term Assets	$228.8M	$183.9M	$181.6M
YoY Change	24.41%	9.88%	7.26%
TOTAL ASSETS
Total Short-Term Assets	$220.3M	$187.5M	$170.3M
Total Long-Term Assets	$228.8M	$183.9M	$181.6M
Total Assets	$449.0M	$371.4M	$351.9M
YoY Change	20.89%	20.59%	12.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$12.45M	$11.76M	$11.12M
YoY Change	5.85%	10.77%	-31.47%
Accrued Expenses	$46.59M	$44.27M	$42.76M
YoY Change	5.23%	20.05%	14.06%
Deferred Revenue	$0.00	$4.627M
YoY Change	-100.0%	95.48%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$59.03M	$56.03M	$53.10M
YoY Change	5.36%	17.98%	0.06%
LONG-TERM LIABILITIES
Long-Term Debt	$6.400M	$6.300M	$0.00
YoY Change	1.59%
Other Long-Term Liabilities	$4.423M	$3.600M	$3.700M
YoY Change	22.86%	100.0%	105.56%
Total Long-Term Liabilities	$4.423M	$9.900M	$3.700M
YoY Change	-55.32%	450.0%	105.56%
TOTAL LIABILITIES
Total Short-Term Liabilities	$59.03M	$56.03M	$53.10M
Total Long-Term Liabilities	$4.423M	$9.900M	$3.700M
Total Liabilities	$63.46M	$81.30M	$72.60M
YoY Change	-21.95%	38.74%	12.73%
SHAREHOLDERS EQUITY
Retained Earnings	$345.5M	$286.3M	$276.7M
YoY Change	20.68%	14.87%	10.93%
Common Stock	$209.0K	$208.0K	$209.0K
YoY Change	0.48%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$350.9M	$290.1M	$279.6M
YoY Change
Total Liabilities & Shareholders Equity	$449.0M	$371.4M	$352.2M
YoY Change	20.89%	20.59%	12.14%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$18.89M	$17.27M	$14.29M
YoY Change	9.37%	33.24%	-1.54%
Depreciation, Depletion And Amortization	$6.600M	$5.200M	$5.800M
YoY Change	26.92%	8.33%	28.89%
Cash From Operating Activities	$31.80M	$27.30M	$34.70M
YoY Change	16.48%	155.14%	333.75%
INVESTING ACTIVITIES
Capital Expenditures	-$18.80M	-$6.400M	-$14.00M
YoY Change	193.75%	113.33%	66.67%
Acquisitions
YoY Change
Other Investing Activities	$6.400M	$0.00	$4.000M
YoY Change		-100.0%	-21.57%
Cash From Investing Activities	-$12.40M	-$6.300M	-$10.00M
YoY Change	96.83%	-1360.0%	203.03%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-15.70M	-5.000M	-10.00M
YoY Change	214.0%	-69.51%	-24.81%
NET CHANGE
Cash From Operating Activities	31.80M	27.30M	34.70M
Cash From Investing Activities	-12.40M	-6.300M	-10.00M
Cash From Financing Activities	-15.70M	-5.000M	-10.00M
Net Change In Cash	3.700M	16.00M	14.70M
YoY Change	-76.87%	-407.69%	-270.93%
FREE CASH FLOW
Cash From Operating Activities	$31.80M	$27.30M	$34.70M
Capital Expenditures	-$18.80M	-$6.400M	-$14.00M
Free Cash Flow	$50.60M	$33.70M	$48.70M
YoY Change	50.15%	145.99%	196.95%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000824142
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CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	0-18953
CY2020	dei	Entity Registrant Name EntityRegistrantName	AAON, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NV
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	87-0448736
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	2425 South Yukon Ave.,
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Tulsa,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	OK
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	74107
CY2020	dei	City Area Code CityAreaCode	918
CY2020	dei	Local Phone Number LocalPhoneNumber	583-2266
CY2020	dei	Security12b Title Security12bTitle	Common Stock
CY2020	dei	Trading Symbol TradingSymbol	AAON
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7862000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	27943000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	27943000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16717000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16717000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	249443000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	249443000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53711000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53711000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	12625000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	12625000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11799000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11799000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	20793000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	20793000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16645000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16645000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	290140000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	79009000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	21418000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11342000	USD
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	31229000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19815000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	350865000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	79009000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53711000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	42329000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	25634000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	22766000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17655000	USD
CY2020	us-gaap	Investment Income Amortization Of Premium InvestmentIncomeAmortizationOfPremium	0	USD
CY2019	us-gaap	Investment Income Amortization Of Premium InvestmentIncomeAmortizationOfPremium	0	USD
CY2018	us-gaap	Investment Income Amortization Of Premium InvestmentIncomeAmortizationOfPremium	13000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	43000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	0	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	153000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	91000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	174000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	1108000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	1454000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	152000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	11342000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	11799000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	7862000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	6478000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-337000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	12000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	12000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	27000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-55000	USD
CY2020	aaon	Interest Income Note Receivable InterestIncomeNoteReceivable	24000	USD
CY2019	aaon	Interest Income Note Receivable InterestIncomeNoteReceivable	25000	USD
CY2018	aaon	Interest Income Note Receivable InterestIncomeNoteReceivable	27000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	13027000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6038000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2641000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-19859000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13412000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2832000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	3815000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-5129000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	4448000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	9726000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2557000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5598000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2364000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	329000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	528000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2155000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	280000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1176000	USD
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	1010000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	425000	USD
CY2018	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	412000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	2203000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	7124000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-1816000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	128814000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	97925000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	54856000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	67802000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	37166000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	37268000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	6377000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	60000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	69000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	13000	USD
CY2020	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	6417000	USD
CY2019	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2018	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	6000000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	7200000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	0	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	6000000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	10080000	USD
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	9001000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	14570000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	495000	USD
CY2020	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	52000	USD
CY2019	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	51000	USD
CY2018	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	53000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-61273000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-37046000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-34635000	USD
CY2020	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	0	USD
CY2019	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	6614000	USD
CY2018	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	0	USD
CY2020	aaon	Payments Of Financing Costs1 PaymentsOfFinancingCosts1	0	USD
CY2019	aaon	Payments Of Financing Costs1 PaymentsOfFinancingCosts1	301000	USD
CY2018	aaon	Payments Of Financing Costs1 PaymentsOfFinancingCosts1	0	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	21418000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	12625000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4987000	USD
CY2020	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	30060000	USD
CY2019	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	19586000	USD
CY2018	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	26846000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1169000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1207000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1097000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	19815000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	16645000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	16728000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-29626000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-18500000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-39684000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	37915000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	42379000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-19463000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	44373000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1994000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21457000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	82288000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	44373000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1994000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	13500000	USD
CY2020Q4	aaon	Number Of Veriable Interes Entities NumberOfVeriableInteresEntities	2	numberOfEntities
CY2019Q4	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	0	USD
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentration of Credit Risk</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our customers are concentrated primarily in the domestic commercial and industrial new construction and replacement markets. To date, our sales have been primarily to the domestic market, with foreign sales accounting for approximately 2%, 3%, and 3% of revenues for the years ended December 31, 2020, 2019, and 2018, respectively. </span></div>One customer, Texas AirSystems LLC, accounted for more than 10% of our sales during 2020, 2019, and 2018. No other customer accounted for more than 10% of our sales during 2020, 2019, and 2018. Two customers, Texas AirSystems LLC and Johnson Borrow Inc., accounted for more than 10% of our accounts receivable balance at December 31, 2020. One customer, Texas AirSystems LLC, accounted for more than 10% of our accounts receivable balance at December 31, 2019. No single customer accounted for more than 15% of our sales during 2020, 2019, and 2018 or more than 15% of our accounts receivable balance at December 31, 2020 and 2019.
CY2020Q2	aaon	Property Insurance Deductible Amount PropertyInsuranceDeductibleAmount	500000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	17400000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	14800000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	800000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	800000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	800000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage	0.20
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	514551000	USD
CY2020	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	50000000.0	USD
CY2019	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	46100000	USD
CY2018	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	47800000	USD
CY2020	aaon	Extended Product Warranties Minimum Length ExtendedProductWarrantiesMinimumLength	P6M
CY2020	aaon	Extended Product Warranties Maximum Length ExtendedProductWarrantiesMaximumLength	P10Y
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Because these estimates and assumptions require significant judgment, actual results could differ from those estimates and could have a significant impact on our results of operations, financial position, and cash flows. We reevaluate our estimates and assumptions as needed, but at a minimum on a quarterly basis. The most significant estimates include, but are not limited to, the allowance for credit losses, inventory reserves, warranty accrual, workers compensation accrual, medical insurance accrual, share-based compensation, and income taxes. Actual results could differ materially from those estimates.</span></div>
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	469333000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	433947000	USD
CY2020	aaon	Revenuefrom Contractwith Customer Including Assessed Tax Numberof Units RevenuefromContractwithCustomerIncludingAssessedTaxNumberofUnits	26231000	unit
CY2019	aaon	Revenuefrom Contractwith Customer Including Assessed Tax Numberof Units RevenuefromContractwithCustomerIncludingAssessedTaxNumberofUnits	26307000	unit
CY2018	aaon	Revenuefrom Contractwith Customer Including Assessed Tax Numberof Units RevenuefromContractwithCustomerIncludingAssessedTaxNumberofUnits	25152000	unit
CY2018Q2	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	400000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	1800000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1800000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1600000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1600000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	174000	USD
CY2020Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	47893000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	67752000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	506000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	353000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	47387000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	67399000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	353000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	264000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	119000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	153000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	91000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	0	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	2000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	29000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	506000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	353000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	264000	USD
CY2020Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	76238000	USD
CY2019Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	68842000	USD
CY2020Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	2088000	USD
CY2019Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	1825000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	7154000	USD
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5578000	USD
CY2020Q4	us-gaap	Inventory Gross InventoryGross	85480000	USD
CY2019Q4	us-gaap	Inventory Gross InventoryGross	76245000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	3261000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	2644000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	82219000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	73601000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	2644000	USD
CY2018Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	1210000	USD
CY2017Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	1118000	USD
CY2020	aaon	Inventory Valuation Reserves Provision InventoryValuationReservesProvision	1108000	USD
CY2019	aaon	Inventory Valuation Reserves Provision InventoryValuationReservesProvision	1454000	USD
CY2018	aaon	Inventory Valuation Reserves Provision InventoryValuationReservesProvision	152000	USD
CY2020	aaon	Inventory Valuation Reserves Write Offs InventoryValuationReservesWriteOffs	491000	USD
CY2019	aaon	Inventory Valuation Reserves Write Offs InventoryValuationReservesWriteOffs	20000	USD
CY2018	aaon	Inventory Valuation Reserves Write Offs InventoryValuationReservesWriteOffs	60000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	3261000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	2644000	USD
CY2018Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	1210000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	700000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	700000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	662000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	428000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	38000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	272000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	234000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	234000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	194000	USD
CY2010Q3	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	1100000	CAD
CY2010Q3	aaon	Notes Loansand Financing Receivable Term NotesLoansandFinancingReceivableTerm	P15Y
CY2010Q3	aaon	Notes Loansand Financing Receivable Interest Rate NotesLoansandFinancingReceivableInterestRate	0.040
CY2010Q3	aaon	Balloonpaymentonnotereceivable Balloonpaymentonnotereceivable	600000	CAD
CY2020	aaon	Note Receivable Payment Terms Balloon Payment Due Date NoteReceivablePaymentTermsBalloonPaymentDueDate	October 2025
CY2019	aaon	Financing Receivable Impairment Charge FinancingReceivableImpairmentCharge	0	USD
CY2020	aaon	Financing Receivable Impairment Charge FinancingReceivableImpairmentCharge	0	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	12652000	USD
CY2020Q4	aaon	Accrued Profit Sharing Current AccruedProfitSharingCurrent	2902000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	6000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13754000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2172000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	14979000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2843000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	863000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	481000	USD
CY2020	aaon	Product Warranty Accrual Minimum Length ProductWarrantyAccrualMinimumLength	P18M
CY2020	aaon	Product Warranty Accrual Maximum Length ProductWarrantyAccrualMaximumLength	P25Y
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	12652000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11421000	USD
CY2017Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	10483000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	5751000	USD
CY2019	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	6816000	USD
CY2018	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	7869000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	6621000	USD
CY2019	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	8047000	USD
CY2018	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	9669000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Period Increase Decrease StandardProductWarrantyAccrualPeriodIncreaseDecrease	0	USD
CY2019	us-gaap	Standard Product Warranty Accrual Period Increase Decrease StandardProductWarrantyAccrualPeriodIncreaseDecrease	0	USD
CY2018	us-gaap	Standard Product Warranty Accrual Period Increase Decrease StandardProductWarrantyAccrualPeriodIncreaseDecrease	-862000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	13522000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11421000	USD
CY2020	us-gaap	Product Warranty Expense ProductWarrantyExpense	6621000	USD
CY2019	us-gaap	Product Warranty Expense ProductWarrantyExpense	8047000	USD
CY2018	us-gaap	Product Warranty Expense ProductWarrantyExpense	8807000	USD
CY2020Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	13522000	USD
CY2019Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	12652000	USD
CY2020Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	8296000	USD
CY2019Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	11538000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	8155000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	5058000	USD
CY2019Q4	aaon	Accrued Profit Sharing Current AccruedProfitSharingCurrent	1721000	USD
CY2020Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	594000	USD
CY2019Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	522000	USD
CY2020Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	1546000	USD
CY2019Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	707000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	5067000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	4627000	USD
CY2020Q4	aaon	Donations Current DonationsCurrent	570000	USD
CY2019Q4	aaon	Donations Current DonationsCurrent	354000	USD
CY2020Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	3321000	USD
CY2019Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	3804000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2613000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	3286000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	46586000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	44269000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22966000	USD
CY2020Q4	aaon	Actual Net Worth For Compliance ActualNetWorthForCompliance	350900000	USD
CY2020Q4	us-gaap	Minimum Net Worth Required For Compliance MinimumNetWorthRequiredForCompliance	175000000.0	USD
CY2020Q4	aaon	Ratio Of Total Liability To Net Worth RatioOfTotalLiabilityToNetWorth	0.3
CY2020Q4	aaon	Maximum Ratio Of Total Liability To Net Worth Required For Compliance MaximumRatioOfTotalLiabilityToNetWorthRequiredForCompliance	2
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9939000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7282000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	10530000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	13027000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6038000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2641000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13320000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13171000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.053
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.052
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.060
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.032
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.026
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.020
CY2020	aaon	Effective Income Tax Rate Reconciliation Return To Provision EffectiveIncomeTaxRateReconciliationReturnToProvision	0.001
CY2019	aaon	Effective Income Tax Rate Reconciliation Return To Provision EffectiveIncomeTaxRateReconciliationReturnToProvision	-0.014
CY2018	aaon	Effective Income Tax Rate Reconciliation Return To Provision EffectiveIncomeTaxRateReconciliationReturnToProvision	0
CY2020	aaon	Effective Income Tax Rate Reconciliation Amended Tax Return EffectiveIncomeTaxRateReconciliationAmendedTaxReturn	0
CY2019	aaon	Effective Income Tax Rate Reconciliation Amended Tax Return EffectiveIncomeTaxRateReconciliationAmendedTaxReturn	-0.013
CY2018	aaon	Effective Income Tax Rate Reconciliation Amended Tax Return EffectiveIncomeTaxRateReconciliationAmendedTaxReturn	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.009
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.010
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.225
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.200
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.240
CY2019	aaon	Additional Income Tax Expense Benefit AdditionalIncomeTaxExpenseBenefit	-600000	USD
CY2020Q4	aaon	Percent Of Eligible Investments For State And Local Tax Credit PercentOfEligibleInvestmentsForStateAndLocalTaxCredit	0.01
CY2020Q4	aaon	Valuationreservesnoncurrent Valuationreservesnoncurrent	1052000	USD
CY2019Q4	aaon	Valuationreservesnoncurrent Valuationreservesnoncurrent	835000	USD
CY2020Q4	aaon	Warrantyaccrualnoncurrent Warrantyaccrualnoncurrent	3776000	USD
CY2019Q4	aaon	Warrantyaccrualnoncurrent Warrantyaccrualnoncurrent	3523000	USD
CY2020Q4	aaon	Otheraccrualsnoncurrent Otheraccrualsnoncurrent	747000	USD
CY2019Q4	aaon	Otheraccrualsnoncurrent Otheraccrualsnoncurrent	1919000	USD
CY2020Q4	aaon	Deferred Tax Asset Share Based Compensation Noncurrent DeferredTaxAssetShareBasedCompensationNoncurrent	4102000	USD
CY2019Q4	aaon	Deferred Tax Asset Share Based Compensation Noncurrent DeferredTaxAssetShareBasedCompensationNoncurrent	3906000	USD
CY2020Q4	aaon	Deferred Tax Assets Donations Noncurrent DeferredTaxAssetsDonationsNoncurrent	297000	USD
CY2019Q4	aaon	Deferred Tax Assets Donations Noncurrent DeferredTaxAssetsDonationsNoncurrent	194000	USD
CY2020Q4	aaon	Deferred Tax Asset Other Net DeferredTaxAssetOtherNet	2457000	USD
CY2019Q4	aaon	Deferred Tax Asset Other Net DeferredTaxAssetOtherNet	2140000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	12431000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	12517000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	40755000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	27814000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	40755000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	27814000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	28324000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	15297000	USD
CY2016Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	8900000	shares
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	740321	shares
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P6Y
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	31.85
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	25751000	USD
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	538949	shares
CY2019	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P5Y9M21D
CY2019Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	21.58
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	12842000	USD
CY2018Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	515977	shares
CY2018	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P5Y11M12D
CY2018Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	21.88
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	6811000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3627047	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	36.32
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1053302	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	45.13
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	644850	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	33.21
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	282554	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	40.64
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3752945	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	39.00
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	740321	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	31.85
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	15500000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	8100000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5400000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	21400000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	12600000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5000000.0	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	267484	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	34.42
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	76148	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	43.54
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	110075	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	32.55
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	8866	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	39.72
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	224691	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	38.22
CY2020	aaon	Share Based Compensation Arrangement By Share Based Payment Award Options Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAwardedInPeriodFairValue	12615000	USD
CY2019	aaon	Share Based Compensation Arrangement By Share Based Payment Award Options Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAwardedInPeriodFairValue	20442000	USD
CY2018	aaon	Share Based Compensation Arrangement By Share Based Payment Award Options Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAwardedInPeriodFairValue	12932000	USD
CY2020	aaon	Share Based Compensation Arrangement By Share Based Payment Award Restriced Stock Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardRestricedStockAwardedInPeriodFairValue	3316000	USD
CY2019	aaon	Share Based Compensation Arrangement By Share Based Payment Award Restriced Stock Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardRestricedStockAwardedInPeriodFairValue	4631000	USD
CY2018	aaon	Share Based Compensation Arrangement By Share Based Payment Award Restriced Stock Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardRestricedStockAwardedInPeriodFairValue	3609000	USD
CY2020	aaon	Share Based Compensation Arrangement By Share Based Payment Award Total Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalAwardedInPeriodFairValue	15931000	USD
CY2019	aaon	Share Based Compensation Arrangement By Share Based Payment Award Total Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalAwardedInPeriodFairValue	25073000	USD
CY2018	aaon	Share Based Compensation Arrangement By Share Based Payment Award Total Awarded In Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalAwardedInPeriodFairValue	16541000	USD
CY2020	aaon	Allocated Share Based Compensation Expense Stock Options AllocatedShareBasedCompensationExpenseStockOptions	8312000	USD
CY2019	aaon	Allocated Share Based Compensation Expense Stock Options AllocatedShareBasedCompensationExpenseStockOptions	9145000	USD
CY2018	aaon	Allocated Share Based Compensation Expense Stock Options AllocatedShareBasedCompensationExpenseStockOptions	5344000	USD
CY2020	aaon	Allocated Share Based Compensation Expense Restricted Stock AllocatedShareBasedCompensationExpenseRestrictedStock	3030000	USD
CY2019	aaon	Allocated Share Based Compensation Expense Restricted Stock AllocatedShareBasedCompensationExpenseRestrictedStock	2654000	USD
CY2018	aaon	Allocated Share Based Compensation Expense Restricted Stock AllocatedShareBasedCompensationExpenseRestrictedStock	2518000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11342000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11799000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7862000	USD
CY2020	aaon	Employee Service Share Based Compensation Tax Benefit From Compensation Expense Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseStockOptions	2698000	USD
CY2019	aaon	Employee Service Share Based Compensation Tax Benefit From Compensation Expense Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseStockOptions	1197000	USD
CY2018	aaon	Employee Service Share Based Compensation Tax Benefit From Compensation Expense Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseStockOptions	980000	USD
CY2020	aaon	Employee Service Share Based Compensation Tax Benefit From Compensation Expense Restricted Stock EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseRestrictedStock	519000	USD
CY2019	aaon	Employee Service Share Based Compensation Tax Benefit From Compensation Expense Restricted Stock EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseRestrictedStock	575000	USD
CY2018	aaon	Employee Service Share Based Compensation Tax Benefit From Compensation Expense Restricted Stock EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseRestrictedStock	353000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3217000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1772000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1333000	USD
CY2020	aaon	Definedcontributionemployeeautomaticcontributionpercentag Definedcontributionemployeeautomaticcontributionpercentag	0.06
CY2020	aaon	Definedcontributionemployeeautomaticcontributionpercentag Definedcontributionemployeeautomaticcontributionpercentag	0.06
CY2020	aaon	Definedcontributionemployeeautomaticcontributionpercentag Definedcontributionemployeeautomaticcontributionpercentag	0.06
CY2020	us-gaap	Defined Contribution Plan Administrative Expenses DefinedContributionPlanAdministrativeExpenses	0	USD
CY2019	us-gaap	Defined Contribution Plan Administrative Expenses DefinedContributionPlanAdministrativeExpenses	0	USD
CY2018	us-gaap	Defined Contribution Plan Administrative Expenses DefinedContributionPlanAdministrativeExpenses	0	USD
CY2020	aaon	Defined Benefit Plan Medical Claim Payments DefinedBenefitPlanMedicalClaimPayments	9060000	USD
CY2019	aaon	Defined Benefit Plan Medical Claim Payments DefinedBenefitPlanMedicalClaimPayments	5898000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	9091000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7034000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	8127000	USD
CY2020	aaon	Profit Sharing Percentof Pretax Profit Paidto Eligible Employeeson Quarterly Basis ProfitSharingPercentofPretaxProfitPaidtoEligibleEmployeesonQuarterlyBasis	0.10
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11593000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7448000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	6165000	USD
CY2018	aaon	Defined Benefit Plan Medical Claim Payments DefinedBenefitPlanMedicalClaimPayments	5915000	USD
CY2020	aaon	Defined Benefit Plan Heath Saving Account Payments DefinedBenefitPlanHeathSavingAccountPayments	3476000	USD
CY2019	aaon	Defined Benefit Plan Heath Saving Account Payments DefinedBenefitPlanHeathSavingAccountPayments	3265000	USD
CY2018	aaon	Defined Benefit Plan Heath Saving Account Payments DefinedBenefitPlanHeathSavingAccountPayments	2948000	USD
CY2018Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	15000000	USD
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	20000000	USD
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	20000000	USD
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	565882	shares
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	31229000	USD
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	55.19
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	454430	shares
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	20793000	USD
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	45.76
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	783776	shares
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	27943000	USD
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	35.65
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	14117116	shares
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	240544000	USD
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	17.04
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19800000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16600000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16700000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	42329000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52168679	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52079865	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52284616	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	79009000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53711000	USD
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	892490	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	555550	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	383323	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53061169	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52635415	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52667939	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	364787	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1868087	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1920313	shares
CY2020	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	3475000	USD
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	886000	USD
CY2018	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1442000	USD
CY2020	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	256000	USD
CY2019	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	332000	USD
CY2018	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	342000	USD
CY2020Q4	us-gaap	Due From Related Parties DueFromRelatedParties	342000	USD
CY2019Q4	us-gaap	Due From Related Parties DueFromRelatedParties	22000	USD
CY2020Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	0	USD
CY2019Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	2000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	137483000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	125596000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	134772000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	116700000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	42947000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	38131000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	40848000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	33923000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	21853000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	17804000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	20460000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	18892000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.36
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2019Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	113822000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	119437000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	113500000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	122574000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	25430000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	30204000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	27410000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	36381000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	8757000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	13391000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	14290000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	17273000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2020Q4	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	4100000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.08
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	514551000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	469333000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	433947000	USD
CY2020	us-gaap	Gross Profit GrossProfit	155849000	USD
CY2019	us-gaap	Gross Profit GrossProfit	119425000	USD
CY2018	us-gaap	Gross Profit GrossProfit	103533000	USD

Files In Submission

Name	View Source	Status
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0000824142-21-000030-index.html	Edgar Link	pending
0000824142-21-000030.txt	Edgar Link	pending
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$AAON
AAON, INC. Stock $aaon

2020 Q4 Form 10-K Financial Statement

#000082414221000030 Filed on February 25, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAON AAON, INC. Stock $aaon

2020 Q4 Form 10-K Financial Statement

#000082414221000030 Filed on February 25, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAON
AAON, INC. Stock $aaon