Stock-based Compensation Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |
9 Months Ended | |
---|---|---|
Jun. 30, 2024 |
Jun. 30, 2023 |
|
Stock-Based Compensation Activity [Line Items] | ||
Unrecognized compensation costs, nonvested awards, amount | $ 13.1 | |
Unrecognized compensation costs, nonvested awards, weighted average recognition period | 2 years 3 months 18 days | |
Restricted Stock Awards [Member] | ||
Stock-Based Compensation Activity [Line Items] | ||
Units granted | 107,000 | 102,000 |
Weighted average grant date fair value | $ 33.84 | $ 35.84 |
Restricted Stock Unit Awards [Member] | ||
Stock-Based Compensation Activity [Line Items] | ||
Units granted | 14,000 | 6,000 |
Weighted average grant date fair value | $ 32.49 | $ 31.72 |
Employee Stock Purchase Plan [Member] | ||
Stock-Based Compensation Activity [Line Items] | ||
Shares issued | 16,000 | 23,000 |