Business Description	12 Months Ended
Dec. 31, 2022
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., 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, packaged outdoor mechanical rooms, air handling units, makeup air units, energy recovery units, condensing units, geothermal/water-source heat pumps, coils, and controls. Impact of COVID-19 Pandemic The magnitude of the impact of the COVID-19 pandemic remains unpredictable and could unfavorably impact our business. However, the direct effects of the COVID-19 pandemic has had no significant impact on our planned cash outflows for raw materials, dividend payments, or capital expenditures. Although future disruptions and costs are expected to be temporary, there is still significant uncertainty around the duration and overall impacts to our business operations. We are continually monitoring the progression of the pandemic, including new COVID-19 variants, and their potential effect on our consolidated financial position, results of operations and cash flows. Inflation and Labor Market In late 2021 and throughout 2022, we have witnessed increases in our raw material and component prices. Due to our favorable liquidity position, we continue to make strategic purchases of materials when we see opportunities. We continue to manage the increase in the cost of raw materials through price increases for our products. We have also experienced supply chain challenges related to specific manufacturing parts, which we have managed through our strong vendor relationships as well as expanding our list of vendors. Additionally, we continue to experience challenges in a tight labor market, especially the hiring of both skilled and unskilled production labor. We have implemented the following wage increases to remain competitive and to attract and retain employees: •In March 2021, we awarded annual merit raises for an overall 5.0% increase to wages. •In July 2021, we increased starting wages for our production workforce by 7.0%. •In October 2021, we implemented a cost of living increase of 3.5% in place for all employees below our Senior Leadership Team ("SLT") which consists of officers and key members of management. •In March 2022, we awarded annual merit raises for an overall 3.0% increase to wages. •In October 2022, we implemented a cost of living increase of 3.5% in place for all employees below the SLT level. We will continue to implement human resource initiatives to retain and attract labor to further improve productivity and production efficiencies. Despite efforts to mitigate the impact of inflation, supply chain issues and the tight labor market, future disruptions, while temporary, could negatively impact our consolidated financial position, results of operations and cash flows. First Quarter 2021 Planned Maintenance and Adverse Weather During the fourth quarter of 2020, we made the strategic decision to shut down our Tulsa, OK and Longview, TX manufacturing facilities to perform planned and necessary maintenance during the last week of December 2020 as well several days in early January 2021. In February 2021, record-breaking winter storms affected Oklahoma and Texas, causing sustained below freezing temperatures, hazardous driving conditions, rolling blackouts, water main breaks, and a host of other weather related issues. In addition to significant absenteeism as a result of employees being unable to travel to and from work due to inadequate transportation and/or hazardous road conditions, the Company made the decision to shut down the Tulsa, OK and Longview, TX plants for several days. This decision was based on the expected employee absenteeism as well as the expected rolling blackouts caused by the increased demand on the electrical and natural gas power grids. WH Series and WV Series Water Source Heat Pump Units As part of the normal course of business, management is continually monitoring the profitability of the Company's various product series offerings. During the third quarter of 2022, management made the decision to no longer produce our small packaged geothermal/water-source heat pump units consisting of the WH Series horizontal configuration and WV Series vertical configuration, from one-half to 12 1/2 tons ("WH/WV"). These WH/WV units are produced solely out of the AAON Oklahoma facility. Production of the remaining WH/WV backlog is expected to continue through the first quarter of 2023. A majority of the long-lived assets used in the production of these units will be immediately reallocated to other product production, providing us additional manufacturing capacity with minimal costs. The workforce from the these production lines will also be reallocated to other product production lines. Management has identified some related components and parts that cannot be used in other products or sold through our parts business; therefore, we have increased our provision for excess and obsolete inventory (Note 7), within cost of sales on our consolidated statements of income, by approximately $1.2 million during the year ended December 31, 2022. Change in Estimate During the first quarter of 2022, a review of the Company's useful lives for certain sheet metal manufacturing equipment at our Longview, Texas facilities resulted in a change in estimate that increased the useful lives from between ten and twelve years to fifteen years. This determination was based on recent and estimated future production levels as well as management's knowledge of the equipment and historical and future use of the equipment. The change in estimate was made prospectively and resulted in a decrease to depreciation expense within cost of sales on our consolidated statements of income of $1.8 million during the year ended December 31, 2022. We do not believe the impact of these events had a material adverse effect on our consolidated financial position, results of operations and cash flows.

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., 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, packaged outdoor mechanical rooms, air handling units, makeup air units, energy recovery units, condensing units, geothermal/water-source heat pumps, coils, and controls.

The magnitude of the impact of the COVID-19 pandemic remains unpredictable and could unfavorably impact our business. However, the direct effects of the COVID-19 pandemic has had no significant impact on our planned cash outflows for raw materials, dividend payments, or capital expenditures.

Although future disruptions and costs are expected to be temporary, there is still significant uncertainty around the duration and overall impacts to our business operations. We are continually monitoring the progression of the pandemic, including new COVID-19 variants, and their potential effect on our consolidated financial position, results of operations and cash flows.

In late 2021 and throughout 2022, we have witnessed increases in our raw material and component prices. Due to our favorable liquidity position, we continue to make strategic purchases of materials when we see opportunities. We continue to manage the increase in the cost of raw materials through price increases for our products. We have also experienced supply chain challenges related to specific manufacturing parts, which we have managed through our strong vendor relationships as well as expanding our list of vendors.

Additionally, we continue to experience challenges in a tight labor market, especially the hiring of both skilled and unskilled production labor. We have implemented the following wage increases to remain competitive and to attract and retain employees:

We will continue to implement human resource initiatives to retain and attract labor to further improve productivity and production efficiencies.

Despite efforts to mitigate the impact of inflation, supply chain issues and the tight labor market, future disruptions, while temporary, could negatively impact our consolidated financial position, results of operations and cash flows.

During the fourth quarter of 2020, we made the strategic decision to shut down our Tulsa, OK and Longview, TX manufacturing facilities to perform planned and necessary maintenance during the last week of December 2020 as well several days in early January 2021.

In February 2021, record-breaking winter storms affected Oklahoma and Texas, causing sustained below freezing temperatures, hazardous driving conditions, rolling blackouts, water main breaks, and a host of other weather related issues. In addition to significant absenteeism as a result of employees being unable to travel to and from work due to inadequate transportation and/or hazardous road conditions, the Company made the decision to shut down the Tulsa, OK and Longview, TX plants for several days. This decision was based on the expected employee absenteeism as well as the expected rolling blackouts caused by the increased demand on the electrical and natural gas power grids.

As part of the normal course of business, management is continually monitoring the profitability of the Company's various product series offerings. During the third quarter of 2022, management made the decision to no longer produce our small packaged geothermal/water-source heat pump units consisting of the WH Series horizontal configuration and WV Series vertical configuration, from one-half to 12 1/2 tons ("WH/WV"). These WH/WV units are produced solely out of the AAON Oklahoma facility. Production of the remaining WH/WV backlog is expected to continue through the first quarter of 2023.

A majority of the long-lived assets used in the production of these units will be immediately reallocated to other product production, providing us additional manufacturing capacity with minimal costs. The workforce from the these production lines will also be reallocated to other product production lines. Management has identified some related components and parts that cannot be used in other products or sold through our parts business; therefore, we have increased our provision for excess and obsolete inventory (Note 7), within cost of sales on our consolidated statements of income, by approximately $1.2 million during the year ended December 31, 2022.

During the first quarter of 2022, a review of the Company's useful lives for certain sheet metal manufacturing equipment at our Longview, Texas facilities resulted in a change in estimate that increased the useful lives from between ten and twelve years to fifteen years. This determination was based on recent and estimated future production levels as well as management's knowledge of the equipment and historical and future use of the equipment. The change in estimate was made prospectively and resulted in a decrease to depreciation expense within cost of sales on our consolidated statements of income of $1.8 million during the year ended December 31, 2022.

We do not believe the impact of these events had a material adverse effect on our consolidated financial position, results of operations and cash flows.