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STOCK-BASED COMPENSATION, 2013 and 2023 Restricted Stock Plans (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Apr. 30, 2022 | Oct. 31, 2018 | Sep. 30, 2023 | Jun. 06, 2023 | Jun. 30, 2020 | Jan. 31, 2013
Restricted Stock Units [Member] | Board of Directors [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Vesting period from grant date | 4 years | 4 years |  |  |  |  |  |
Number of restricted stock units granted (in shares) | 14,000 | 14,000 |  |  |  |  |  |
Restricted Stock Units [Member] | Key Employees [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Vesting period from grant date |  |  | 3 years |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  | 120,231 |  |  |  |  |
Restricted Stock Units [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  |  | 644,000 |  |  |  |
Service-Based Restricted Stock Units [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Vesting period from grant date |  |  |  |  | 5 years |  |  |
Number of restricted stock units granted (in shares) |  |  |  | 460,000 |  |  |  |
Performance-Based Restricted Stock Units [Member] | Chief Executive Officer [Member] | Tranche One [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  |  | 92,000 |  |  |  |
Minimum amount of operating income, award vesting condition |  |  |  | $ 12 |  |  |  |
Performance-Based Restricted Stock Units [Member] | Chief Executive Officer [Member] | Tranche Two [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  |  | 92,000 |  |  |  |
Minimum amount of operating income, award vesting condition |  |  |  | $ 14 |  |  |  |
2013 Restricted Stock Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Vesting period from grant date |  |  |  |  | 4 years |  |  |
2013 Restricted Stock Plan [Member] | Restricted Stock Units [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Number of common shares reserved for issuance (in shares) |  |  |  |  |  |  | 800,000 |
2013 Restricted Stock Plan [Member] | Restricted Stock Units [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Number of common shares reserved for issuance (in shares) |  |  |  |  |  |  |  | 300,000
2023 Restricted Stock Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Vesting period from grant date |  |  |  |  | 4 years |  |  |
2023 Restricted Stock Plan [Member] | Restricted Stock Units [Member] |  |  |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |  |  |
Number of common shares reserved for issuance (in shares) |  |  |  |  |  | 800,000 |  |

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