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Business Description	12 Months Ended
Business Description	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Description	Business Description AAON, Inc. is a Nevada corporation which was incorporated on August 18, 1987. Our operating subsidiaries include AAON, Inc., an Oklahoma corporation, AAON Coil Products, Inc., a Texas corporation, and BasX, Inc. (dba BasX Solutions), an Oregon corporation (collectively, the “Company”). The consolidated financial statements include our accounts and the accounts of our subsidiaries. We are engaged in the engineering, manufacturing, marketing, and sale of premium air conditioning and heating equipment consisting of standard, semi-custom, and custom rooftop units, data centers cooling solutions, cleanroom systems, chillers, packaged outdoor mechanical rooms, air handling units, makeup air units, energy recovery units, condensing units, geothermal/water-source heat pumps, coils, and controls. Recent Developments On December 10, 2021, we closed on the acquisition of all of the issued and outstanding equity ownership of BasX, LLC, doing business as BasX Solutions ("BasX") (Note 4). We have included the results of BasX’s operations in our consolidated financial statements beginning December 11, 2021. On December 29, 2021, BasX, LLC converted to a C-Corporation, BasX, Inc., and is subject to income tax.