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SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
May 16, 2023 | Mar. 31, 2023 | Jan. 01, 2023 | Sep. 15, 2015 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares (in shares) |  |  |  | 775,000 |  |  |  |
Term of award |  |  |  | 10 years |  |  |  |
Share price at grant date (in dollars per share) |  |  | $ 58.67 |  |  |  |  |
Stock-based compensation expense |  |  |  |  | $ 602 | $ 709 | $ 2,700 | $ 1,900
President and Chief Executive Officer |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Awards granted (in shares) |  | 5,492 |  |  |  |  |  |
Chief Financial Officer |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Awards granted (in shares) |  | 2,746 |  |  |  |  |  |
Chief Financial Officer | Vesting Period One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  | 33.00% |  |  |  |  |  |
Chief Financial Officer | Vesting Period Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  | 67.00% |  |  |  |  |  |
Chief Executive Officer |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | $ 737 |
Exercised in period (in shares) |  |  |  |  |  |  | 425 |
Employee |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options granted (in shares) |  |  | 45,955 |  |  |  |  |
Fair value of stock options (in dollars per share) |  |  | $ 11.086 |  |  |  |  |
Time-based RSUs |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Term of award |  |  | 3 years |  |  |  |  |
Time-based RSUs | Employee |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Awards granted (in shares) |  |  | 14,256 |  |  |  |  |
Time-based RSUs | Employee | Vesting Period One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 33.00% |  |  |  |  |
Time-based RSUs | Employee | Vesting Period Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 33.00% |  |  |  |  |
Time-based RSUs | Employee | Vesting Period Three |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 33.00% |  |  |  |  |
Time-based RSUs | Trustees |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Awards granted (in shares) | 9,200 |  |  |  |  |  |  |
Performance-based RSUs |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares eligible to be earned (in shares) |  |  | 40,994 |  |  |  |  |
Shares eligible to be earned, percentage of awards granted |  |  | 2 |  |  |  |  |
Expected volatility |  |  | 37.20% |  |  |  |  |
Risk-free rate |  |  | 4.22% |  |  |  |  |
Expected term |  |  | 3 years |  |  |  |  |
Performance-based RSUs | Employee |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Awards granted (in shares) |  |  | 20,497 |  |  |  |  |
Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  | 28.70% |
Risk-free rate |  |  |  |  |  |  | 3.97% |
Expected term |  |  |  |  |  |  | 6 years 3 months |
Stock Options | Vesting Period One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 25.00% |  |  |  |  |
Stock Options | Vesting Period Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 25.00% |  |  |  |  |
Stock Options | Vesting Period Three |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 25.00% |  |  |  |  |
Stock Options | Vesting Period Four |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 25.00% |  |  |  |  |

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