Income Taxes - Additional Information (Details)	Jun. 30, 2020
Income Tax Disclosure [Abstract]
CARES Act, percent of first-year bonus depreciation	100.00%

CARES Act, Percent of First-year Bonus Depreciation

No definition available.

Name:	aaon_CARESActPercentOfFirstYearBonusDepreciation
Namespace Prefix:	aaon_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant