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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 contract
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Commitments and Contingencies Disclosure [Abstract] |
Number of contracts | 1aaon_ContractualObligationNumberofContracts
Contractual obligation | $ 1.4us-gaap_ContractualObligation

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- Definition Contractual Obligation, Number of Contracts + References No definition available. + Details
Name: | aaon_ContractualObligationNumberofContracts
Namespace Prefix: | aaon_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant