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Contingencies (Tables)
6 Months Ended
Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]  
Warranty reserves
Changes in warranty reserves are as follows for the periods presented:
Three Months EndedSix Months Ended
 March 31,March 31,
in thousands2024202320242023
Balance at beginning of period$12,348 $13,159 $13,046 $13,926 
Warranty provision2,208 2,335 4,112 3,938 
Warranty expenditures(2,427)(2,421)(5,029)(4,791)
Balance at end of period$12,129 $13,073 $12,129 $13,073