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Retirement Benefit Plans (Tables)
3 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost The components of net periodic benefit cost of the Company’s defined benefit plans are as follows:
Three Months Ended
December 31,
 20202019
Service cost$26 $85 
Interest cost175 208 
Expected return on plan assets(355)(376)
Amortization of net loss211 188 
Net periodic cost$57 $105