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Warranties (Tables)
9 Months Ended
Sep. 30, 2025
Guarantees [Abstract]  
Warranty
Changes in the warranty accrual are as follows:
 Three Months EndedNine Months Ended
 September 30,
2025
September 30,
2024
September 30,
2025
September 30,
2024
Warranty accrual:(in thousands)
Balance, beginning of period$23,762 $21,632 $24,341 $20,573 
Payments made(5,127)(3,672)(12,516)(9,331)
Warranty expense8,905 4,670 15,715 11,388 
Balance, end of period$27,540 $22,630 $27,540 $22,630 

Warranty expense (benefit) by reportable segment (Note 21) is as follows:
 Three Months EndedNine Months Ended
 September 30,
2025
September 30,
2024
September 30,
2025
September 30,
2024
(in thousands)
AAON Oklahoma$6,224 $3,336 $11,101 $9,332 
AAON Coil Products2,144 803 3,004 1,323 
BASX537 531 1,610 733 
Total$8,905 $4,670 $15,715 $11,388