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v3.20.4

Note Receivable (Details) $ in Thousands, $ in Millions |  | 12 Months Ended
--- | --- | ---
Sep. 30, 2010 CAD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Note Receivable [Abstract] |  |  |
Note receivable | $ 1.1 | $ 579 | $ 597
Term | 15 years |  |
Interest rate | 4.00% |  |
Balloon payment on note receivable | $ 0.6 |  |
Balloon payment due date |  | October 2025 |
Financing receivable impairment charge |  | $ 0 | $ 0

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- Definition Amount of balloon payment associated with note receivable. + References No definition available. + Details
Name: | aaon_Balloonpaymentonnotereceivable
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable Impairment Charge + References No definition available. + Details
Name: | aaon_FinancingReceivableImpairmentCharge
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | aaon_NoteReceivableAbstract
Namespace Prefix: | aaon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Due date of balloon payment for note receivable. + References No definition available. + Details
Name: | aaon_NoteReceivablePaymentTermsBalloonPaymentDueDate
Namespace Prefix: | aaon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Notes, Loans and Financing Receivable, interest rate earned on note receivables. + References No definition available. + Details
Name: | aaon_NotesLoansandFinancingReceivableInterestRate
Namespace Prefix: | aaon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Notes, Loans and Financing Receivable, Term + References No definition available. + Details
Name: | aaon_NotesLoansandFinancingReceivableTerm
Namespace Prefix: | aaon_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount, after allowance for credit loss, of financing receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesAndLoansReceivableNetNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant