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Subsequent Event (Details) - Subsequent Event	May 07, 2020 USD ($) contract	Apr. 22, 2020 USD ($)
Subsequent Event [Line Items]
Insurance claim, deductible		$ 500,000
Number of purchase obligations | contract	3
Purchase obligation	$ 5,100,000

X

- Definition

Insurance Claim, Deductible

+ References

No definition available.

+ Details

Name:	aaon_InsuranceClaimDeductible
Namespace Prefix:	aaon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of Purchase Obligations

+ References

No definition available.

+ Details

Name:	aaon_NumberOfPurchaseObligations
Namespace Prefix:	aaon_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: