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Accumulated Other Comprehensive Loss
 6 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are as follows:
March 31,
2021		September 30,
2020
Foreign currency translation adjustment$(5,274)$(5,257)
Retirement plan liability adjustment, net of tax(7,788)(8,211)
Total accumulated other comprehensive loss$(13,062)$(13,468)