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EARNINGS PER COMMON SHARE - Shares of common stock underlying RSUs (Details) - RSUs - shares |  | 1 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jul. 16, 2024 | May 31, 2025 | Jun. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Earnings Per Common Share |  |  |  |  |
Number of underlying shares |  |  |  | 263,075 | 256,740
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric |  |  |  | 88,858 | 41,600
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric |  |  |  | 38,702 | 124,975
Total |  |  |  | 127,560 | 166,575
Common shares not included in calculation due applicable metric had not been met at measurement dates |  |  |  | 135,515 | 90,165
Number of shares vested |  |  | 36,704 | 36,704 | 39,811
Number of shares forfeited |  |  |  | 48,036 | 39,811
Performance cycle |  |  |  | 3 years |
July 1, 2025 |  |  |  |  |
Earnings Per Common Share |  |  |  |  |
Number of underlying shares |  |  |  | 91,075 |
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric |  |  |  | 33,824 |
Total |  |  |  | 33,824 |
Common shares not included in calculation due applicable metric had not been met at measurement dates |  |  |  | 57,251 |
July 16, 2024 |  |  |  |  |
Earnings Per Common Share |  |  |  |  |
Number of underlying shares |  |  |  | 87,500 | 88,250
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric |  |  |  | 28,103 | 2,067
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric |  |  |  |  | 44,125
Total |  |  |  | 28,103 | 46,192
Common shares not included in calculation due applicable metric had not been met at measurement dates |  |  |  | 59,397 | 42,058
Number of shares forfeited |  | 750 |  |  |
Performance cycle | 3 years |  |  |  |
July 1, 2023 |  |  |  |  |
Earnings Per Common Share |  |  |  |  |
Number of underlying shares |  |  |  | 84,500 | 85,250
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric |  |  |  | 26,931 | 14,373
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric |  |  |  | 38,702 | 42,625
Total |  |  |  | 65,633 | 56,998
Common shares not included in calculation due applicable metric had not been met at measurement dates |  |  |  | 18,867 | 28,252
Number of shares forfeited |  | 750 |  |  |
July 1, 2022 |  |  |  |  |
Earnings Per Common Share |  |  |  |  |
Number of underlying shares |  |  |  |  | 83,240
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric |  |  |  |  | 25,160
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric |  |  |  |  | 38,225
Total |  |  |  |  | 63,385
Common shares not included in calculation due applicable metric had not been met at measurement dates |  |  |  |  | 19,855
Number of shares vested |  |  | 36,704 |  |
Number of shares forfeited |  |  | 46,536 |  |

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