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Pay vs Performance Disclosure - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pay vs Performance Disclosure [Table]      
Pay vs Performance [Table Text Block]
YearSummary Compensation Table total for PEO ($)Compensation actually paid to PEO ($)
Average Summary Compensation Table total for non-PEO named executive officers ($)
Average compensation actually paid to non-PEO named executive officers ($)Value of initial fixed $100 investment based on:Net Income ($000s)Net Sales ($000s)
Total shareholder return ($)S&P 600 Capital Goods Industry Group TSR ($)
20223,401,4623,844,215848,828733,570155.24138.76100,376888,788
20212,912,1085,480,6461,064,8561,400,334162.64145.0358,758534,517
20202,387,6736,460,9461,285,4243,065,868135.70115.6879,009514,551
    
Named Executive Officers, Footnote [Text Block]
YearPEONon-PEO NEOs
2022Gary D. FieldsCasey R. Kidwell, Larry G. Stewart, Rebecca A. Thompson, Stephen E. Wakefield, Gordon D. Wichman
2021Gary D. FieldsNorman H. Asbjornson, Scott M. Asbjornson, Larry G. Stewart, Rebecca A. Thompson, Stephen E. Wakefield
2020Gary D. FieldsNorman H. Asbjornson, Scott M. Asbjornson, Rebecca A. Thompson, Stephen E. Wakefield
    
PEO Total Compensation Amount $ 3,401,462 $ 2,912,108 $ 2,387,673
PEO Actually Paid Compensation Amount $ 3,844,215 5,480,646 6,460,946
Adjustment To PEO Compensation, Footnote [Text Block]
The table below provides the adjustments made to the Summary Compensation Table total compensation to arrive at the compensation actually paid for the PEO and the average for the Non-PEO NEOs:

202020212022
PEOAverage for Non-PEO NEOsPEOAverage for Non-PEO NEOsPEOAverage for Non-PEO NEOs
Less: Fair value of equity awards reported in Summary Compensation Table for applicable year(1,310,542)(666,094)(1,437,328)(464,911)(1,528,171)(271,436)
Add: Fair value of equity awards granted in applicable year at year end2,678,3031,680,2091,633,142478,5262,760,769491,969
Change in fair value of unvested equity awards from prior years2,088,973601,9861,944,716420,880(500,273)(139,312)
Change in fair value of vested equity awards from prior years614,783163,694424,93011,506(294,512)(79,925)
Less: Fair value of equity awards forfeited during the covered year———(111,693)—(117,768)
Add: Dividends paid1,7566493,0781,1704,9401,214
Total Adjustments4,073,2731,780,4442,568,538335,478442,753(115,258)
    
Non-PEO NEO Average Total Compensation Amount $ 848,828 1,064,856 1,285,424
Non-PEO NEO Average Compensation Actually Paid Amount $ 733,570 1,400,334 3,065,868
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
The table below provides the adjustments made to the Summary Compensation Table total compensation to arrive at the compensation actually paid for the PEO and the average for the Non-PEO NEOs:

202020212022
PEOAverage for Non-PEO NEOsPEOAverage for Non-PEO NEOsPEOAverage for Non-PEO NEOs
Less: Fair value of equity awards reported in Summary Compensation Table for applicable year(1,310,542)(666,094)(1,437,328)(464,911)(1,528,171)(271,436)
Add: Fair value of equity awards granted in applicable year at year end2,678,3031,680,2091,633,142478,5262,760,769491,969
Change in fair value of unvested equity awards from prior years2,088,973601,9861,944,716420,880(500,273)(139,312)
Change in fair value of vested equity awards from prior years614,783163,694424,93011,506(294,512)(79,925)
Less: Fair value of equity awards forfeited during the covered year———(111,693)—(117,768)
Add: Dividends paid1,7566493,0781,1704,9401,214
Total Adjustments4,073,2731,780,4442,568,538335,478442,753(115,258)
    
Compensation Actually Paid vs. Total Shareholder Return [Text Block] aaon-20230330_g3.jpg    
Compensation Actually Paid vs. Net Income [Text Block] aaon-20230330_g4.jpg    
Compensation Actually Paid vs. Company Selected Measure [Text Block] aaon-20230330_g5.jpg    
Tabular List [Table Text Block] For the year ending December 31, 2022, the most important financial performance measures used to link compensation actually paid to our NEOs to Company performance were net sales, operating profit and our total shareholder return ("TSR"). Our NEO's target total compensation is tied to performance goals aligned with our stockholders' interest. The majority of target compensation was weighted toward long-term equity performance and time-based awards and the financial performance metric was TSR. The short-term incentive program's funding metrics are net sales and operating profit.    
Total Shareholder Return Amount $ 155.24 162.64 135.70
Peer Group Total Shareholder Return Amount 138.76 145.03 115.68
Net Income (Loss) $ 100,376,000 $ 58,758,000 $ 79,009,000
Company Selected Measure Amount 888,788,000 534,517,000 514,551,000
PEO Name Gary D. Fields Gary D. Fields Gary D. Fields
Additional 402(v) Disclosure [Text Block] All fair value calculations were performed in accordance with the provisions of FASB ASC Topic 718 and consistent with the methods utilized to calculate grant date fair values as disclosed in Note 14 - Share-Based Compensation to our consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2022. Non-qualified stock option fair values are calculated based on the Black-Scholes option pricing model. Adjustments have been made using our stock price as of each measurement date and updated assumptions for expected term, volatility, dividend yield and interest rates. Restricted stock award adjustments have been made using our stock price as of each measurement date and updated assumptions for interest rates and dividend yield and accrued dividends for vesting restricted stock awards. For PSUs, adjustments at each measurement date have been made based on the expected level of achievement with respect to the Company's TSR benchmarked against the S&P 600 Capital Goods Industry Group.    
Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Compensation Actually Paid vs. Other Measure [Text Block] aaon-20230330_g6.jpg    
PEO [Member] | Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Measure Name net sales    
PEO [Member] | Measure [Axis]: 2      
Pay vs Performance Disclosure [Table]      
Measure Name operating profit    
PEO [Member] | Measure [Axis]: 3      
Pay vs Performance Disclosure [Table]      
Measure Name total shareholder return ("TSR")    
PEO [Member] | Equity Awards Reported In Summary Compensation Table For Applicable Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards $ (1,528,171) $ (1,437,328) $ (1,310,542)
PEO [Member] | Equity Awards Granted During the Year, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards 2,760,769 1,633,142 2,678,303
PEO [Member] | Equity Awards Granted in Prior Years, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards (500,273) 1,944,716 2,088,973
PEO [Member] | Equity Awards Granted in Prior Years, Vested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards (294,512) 424,930 614,783
PEO [Member] | Equity Awards Forfeited During the Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards 0 0 0
PEO [Member] | Equity Awards, Dividends Paid [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards 4,940 3,078 1,756
PEO [Member] | Equity Award Adjustments [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ 442,753 2,568,538 4,073,273
Non-PEO NEO [Member] | Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Measure Name long-term equity performance    
Non-PEO NEO [Member] | Measure [Axis]: 2      
Pay vs Performance Disclosure [Table]      
Measure Name time-based awards    
Non-PEO NEO [Member] | Measure [Axis]: 3      
Pay vs Performance Disclosure [Table]      
Measure Name TSR    
Non-PEO NEO [Member] | Measure [Axis]: 4      
Pay vs Performance Disclosure [Table]      
Measure Name net sales and operating profit    
Non-PEO NEO [Member] | Equity Awards Reported In Summary Compensation Table For Applicable Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards $ (271,436) (464,911) (666,094)
Non-PEO NEO [Member] | Equity Awards Granted During the Year, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards 491,969 478,526 1,680,209
Non-PEO NEO [Member] | Equity Awards Granted in Prior Years, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards (139,312) 420,880 601,986
Non-PEO NEO [Member] | Equity Awards Granted in Prior Years, Vested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards (79,925) 11,506 163,694
Non-PEO NEO [Member] | Equity Awards Forfeited During the Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards (117,768) (111,693) 0
Non-PEO NEO [Member] | Equity Awards, Dividends Paid [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount, Equity Awards 1,214 1,170 649
Non-PEO NEO [Member] | Equity Award Adjustments [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ (115,258) $ 335,478 $ 1,780,444