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Benefit Plans - Schedule of Components of Pension Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2023
Retirement Benefits [Abstract]    
Service cost $ 26 $ 52
Interest cost 93 186
Expected return on plan assets (84) (168)
Net periodic pension cost $ 35 $ 70