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Benefit Plans (Tables)
 6 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Schedule of Components of Pension Expense
The components of net periodic pension cost are as follows:
Three Months Ended March 31,Six Months Ended March 31,
(in thousands)2024202320242023
Service cost$26 $26 $52 $52 
Interest cost92 93 184 186 
Expected return on plan assets(76)(84)(152)(168)
Net periodic pension cost$42 $35 $84 $70