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INVESTMENTS IN SECURITIES AND DERIVATIVE INSTRUMENTS - Narratives (Details) - USD ($) |  | 2 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 30, 2023 | Feb. 24, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Jan. 07, 2022 | Aug. 31, 2021
Derivatives, Fair Value |  |  |  |  |  |
Long-term debt gross |  |  | $ 125,914,000 | $ 136,932,000 |  |
Derivative loss |  | $ 100,000 |  |  |  |
Repayments of long-term debt |  |  | 27,850,000 | 3,813,000 |  |
Unrealized gain of interest rate swaps, net of tax |  |  | 998,000 | 929,000 |  |
Gross loss from derivative instrument |  |  | 300,000 | 0 |  |
Gross gain from derivative instrument |  |  |  | 0 |  |
Gain from equity investments |  |  | 500,000 | 2,400,000 |  |
Loss from equity investments |  |  | 900,000 | 2,800,000 |  |
Margin account outstanding |  |  | 100,000 | 0 |  |
Cash margin balance |  |  | 200,000 | $ 0 |  |
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | (Loss) Income before income taxes |  |
Fair Value, Inputs, Level 2 |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Derivative asset |  |  | 2,420,000 | $ 889,000 |  |
Unsecured Debt | Contrail Debt |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Interest rate stated percentage (as a percentage) |  |  |  |  | 4.68% |
Long-term debt gross |  |  | $ 50,621,000 | 57,459,000 | $ 43,600,000 |
Repayments of long-term debt | $ 6,700,000 |  |  |  |  |
Margin Account Borrowings |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Debt instrument, interest rate borrowings (as a percentage) |  |  | 6.33% |  |  |
Interest Rate Swap |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Unrealized gain of interest rate swaps, net of tax |  |  | $ 1,000,000 | 900,000 |  |
Interest Rate Swap | Fair Value, Inputs, Level 2 |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Derivative asset |  |  | 2,400,000 | 900,000 |  |
Parent Company | Unsecured Debt |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Long-term debt gross |  |  | $ 47,963,000 | 51,813,000 |  |
Term Note A - MBT | Parent Company | Unsecured Debt |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Interest rate stated percentage (as a percentage) |  |  | 3.42% |  |  | 3.42%
Long-term debt gross |  |  | $ 7,762,000 | 8,542,000 |  |
Term Note A - MBT | Parent Company | Interest Rate Swap | Unsecured Debt |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Interest rate stated percentage (as a percentage) |  |  | 4.56% |  |  |
Term Note D - MBT | Parent Company | Unsecured Debt |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Long-term debt gross |  |  | $ 1,338,000 | $ 1,405,000 |  |
Term Note D - MBT | Parent Company | Interest Rate Swap | Unsecured Debt |  |  |  |  |  |
Derivatives, Fair Value |  |  |  |  |  |
Interest rate stated percentage (as a percentage) |  |  | 5.09% |  |  |

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