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Warranties
 12 Months Ended
Dec. 31, 2024
Guarantees [Abstract]  
Warranties Warranties
The Company has product warranties with various terms from one year from the date of first use or 18 months for parts, data center cooling solutions, and cleanroom systems to 25 years for certain heat exchangers. The Company has an obligation to replace parts if conditions under the warranty are met. A provision is made for estimated warranty costs at the time the related products are sold based upon the warranty period, historical trends, new products, and any known identifiable warranty issues.  
Changes in the warranty accrual are as follows:
 Years Ended December 31,
 202420232022
Warranty accrual:(in thousands)
Balance, beginning of period$20,573 $15,682 $13,769 
Payments made(12,959)(11,274)(6,584)
Warranty expense16,727 16,165 8,497 
     Balance, end of period$24,341 $20,573 $15,682 

Warranty expense by reportable segment (Note 23) is as follows:
 Years Ended December 31,
 202420232022
(in thousands)
AAON Oklahoma$13,446 $13,126 $6,069 
AAON Coil Products1,931 1,706 1,599 
BASX1,350 1,333 829 
Total$16,727 $16,165 $8,497