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Warranties - Warranty Expense by Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Warranty expense | $ 23,829 | $ 16,727 | $ 16,165
AAON Oklahoma |  |  |
Segment Reporting Information [Line Items] |  |  |
Warranty expense | 14,525 | 13,446 | 13,126
AAON Coil Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Warranty expense | 7,052 | 1,931 | 1,706
BasX |  |  |
Segment Reporting Information [Line Items] |  |  |
Warranty expense | $ 2,252 | $ 1,350 | $ 1,333

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- Definition Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
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