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Employee Benefit Plans (Tables) | 12 Months Ended
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Sep. 30, 2025
Compensation Related Costs [Abstract] |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity | The following table provides additional information related to time-based RSU activity during those periods. The number of RSUs vested included shares of common stock withheld by the Company on behalf of the employees to satisfy the tax withholding requirements.
| Year Ended September 30,
| 2025 |  | 2024 |  | 2023
| Number of Restricted Stock Units |  | Weighted Average Grant Date Fair Value |  | Number of Restricted Stock Units |  | Weighted Average Grant Date Fair Value |  | Number of Restricted Stock Units |  | Weighted Average Grant Date Fair Value
Outstanding at beginning of year | 715,875 |  |  | $ | 21.63 |  |  | 885,094 |  |  | $ | 16.63 |  |  | 621,951 |  |  | $ | 18.94 |
Granted | 306,300 |  |  | 29.00 |  |  | 178,035 |  |  | 37.94 |  |  | 511,698 |  |  | 14.76 |
Vested | (238,328) |  |  | 20.82 |  |  | (293,253) |  |  | 17.07 |  |  | (186,812) |  |  | 18.88 |
Cancelled | (25,096) |  |  | 23.02 |  |  | (54,001) |  |  | 18.18 |  |  | (61,743) |  |  | 17.63 |
Outstanding at end of year | 758,751 |  |  | $ | 24.81 |  |  | 715,875 |  |  | $ | 21.63 |  |  | 885,094 |  |  | $ | 16.63 |
Share-Based Payment Arrangement, Performance Shares, Activity | The following table provides additional information related to the PSUs outstanding at September 30, 2025.
Grant Date |  | Vesting Date |  | Target Number of Performance Units |  | Grant Date Fair Value per Unit |  | Compensation Expense
|  |  |  | Year Ended September 30,
|  |  |  | 2025 |  | 2024 |  | 2023
|  |  |  |  |  |  |  | (In millions)
October 2024 |  | September 2027 |  | 99,097 |  | $ | 35.20 |  |  | $ | 1.2 |  |  | $ | — |  |  | $ | — |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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