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Stock and Other Compensation Plans (Tables)
 12 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following summarizes information regarding the restricted stock units granted under the plan during the fiscal years ended September 30, 2023, 2022 and 2021:
 202320222021
 Number of
Restricted
Units		Weighted
Average
Grant-Date
Fair
Value		Number of
Restricted
Units		Weighted
Average
Grant-Date
Fair
Value		Number of
Restricted
Units		Weighted
Average
Grant-Date
Fair
Value
Nonvested at beginning of year381,295 $105.69 378,127 $102.45 443,279 $99.28 
Granted241,436 109.78 179,738 108.07 223,954 102.68 
Vested(220,929)104.05 (159,019)100.99 (271,435)97.44 
Forfeited(11,845)107.47 (17,551)103.37 (17,671)101.48 
Nonvested at end of year389,957 $109.10 381,295 $105.69 378,127 $102.45