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Note Receivable | 12 Months Ended
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Dec. 31, 2018
Note Receivable [Abstract] |
Note Receivable | Note Receivable In connection with the closure of our Canadian facility on May 18, 2009, we sold land and a building in September 2010 and assumed a note receivable from the borrower secured by the property. The C$1.1 million, 15 year note has an interest rate of 4.0% and is payable to us monthly, and has a C$0.6 million balloon payment due in October 2025. Interest payments are recognized in interest income. We evaluate the note for impairment on a quarterly basis. We determine the note receivable to be impaired if we are uncertain of its collectability based on the contractual terms. At December 31, 2018 and 2017, there was no impairment.

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

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- Definition Disclosure of notes receivable. + References No definition available. + Details
Name: | aaon_NoteReceivableDisclosureTextBlock
Namespace Prefix: | aaon_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration