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DEBT AND FINANCING LEASE LIABILITIES - Additional Information (Details) |  |  |  |  |  |  | 2 Months Ended | 9 Months Ended |  |
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Oct. 31, 2025 USD ($) | Sep. 26, 2025 USD ($) | Jun. 27, 2025 USD ($) | May 27, 2025 USD ($) | Apr. 30, 2025 USD ($) | Jan. 23, 2025 USD ($) | Jun. 27, 2025 USD ($) | Sep. 30, 2025 USD ($) project | Sep. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) | Sep. 28, 2023
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt |  |  |  |  |  |  |  | $ 16,750,000 | $ 68,750,000 |  |
Make-whole Provision April 2045 | Other liabilities | Not Designated |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability derivatives, fair value |  |  |  |  | $ 3,040,000 |  |  |  |  |  |
Make-whole Provisions May 2038 | Other liabilities | Not Designated |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability derivatives, fair value |  |  |  | $ 347,000 |  |  |  |  |  |  |
Senior secured corporate term loans | Secured Debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt |  |  |  |  |  | $ 13,000,000 |  |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  | $ 96,250,000 |  | $ 13,000,000 |
Term Loan A | Secured Debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  |  |  |  |  | 7.06% |  |  |
Senior Secured Credit Facility | Secured Debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  |  | $ 2,345,000 |  |  |
Senior Secured Notes, Due September 2045 | Senior Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  |  | 6.72% |  |  |  |  |  |
Debt issuance costs |  |  |  |  | $ 3,126,000 |  |  |  |  |  |
Proceeds from issuance of senior long-term debt |  |  | $ 10,291,000 |  | $ 67,708,000 |  | $ 78,000,000 |  |  |  |
Debt instrument, term |  |  |  |  | 20 years |  |  |  |  |  |
Original principal amount |  |  |  |  | $ 300,000,000 |  |  |  |  |  |
Investment tax credit, prepayment amount |  |  |  |  |  |  |  | $ 30,000,000 |  |  |
Term Loan Due May 27,2028 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | 8,273,000 |  |  |  |  |  |  |
Term Loan Due June 2025 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 31,086,000 |  |  |  |  |  |  |
August 2018 Long Term Finance Liability | Solar Photovoltaic Projects |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Solar PV projects sold | project |  |  |  |  |  |  |  | 8 |  |  |
Cash proceeds from sale-leaseback of energy assets |  |  |  |  |  |  |  | $ 28,554,000 |  |  |
Senior Secured First Lien Term Notes, 5.71% Due December 31, 2043 | Senior Notes | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage | 5.71% |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of senior long-term debt | $ 34,356,000 |  |  |  |  |  |  |  |  |  |
Second Lien Term Notes, 7.4% Due September 2040 | Senior Notes | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage | 7.40% |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of senior long-term debt | $ 15,129,000 |  |  |  |  |  |  |  |  |  |
Senior Secured First Lien Term Notes, 5.71% Due December 2043 And Second Lien Term Notes, 7.40% Due September 2040Due September 2030 | Senior Notes | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs | $ 763,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, term | 20 years |  |  |  |  |  |  |  |  |  |
Original principal amount | $ 80,000,000 |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit facility, periodic payment |  |  |  |  |  | $ 1,250,000 |  |  |  |  |
Minimum debt service coverage ratio |  |  |  |  |  | 1.5 |  |  |  |  |
Revolving Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  |  |  |  |  | 7.71% |  |  |
Proceeds used to repay revolving credit facility |  |  |  |  |  | $ 180,000,000 |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 100,000,000 |  |  |  |  |
Revolving Credit Facility | Senior Secured Credit Facility | Line of Credit | Debt Covenant, Period Five |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total funded debt to EBITDA covenant ratio |  |  |  |  |  | 3.5 |  |  |  |  |
Revolving Credit Facility | Term Loan Due December 28, 2028 | Secured Debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt |  |  |  |  |  | $ 225,000,000 |  |  |  |  |
Revolving Credit Facility | Construction Credit Facility, Due December 2027 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  |  |  |  |  | 8.31% |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 415,000,000 |  |  |
Repayments of debt |  |  |  |  |  |  |  | 75,272,000 |  |  |
Long-term debt |  |  |  |  |  |  |  | 408,483,000 |  |  |
Proceeds to pay off the construction credit facility |  |  |  |  |  |  |  | 171,448,000 |  |  |
Increase in maximum commitment |  |  |  |  |  |  |  | $ 400,000,000 |  |  |
Revolving Credit Facility | Construction Credit Facility, Due March 2026 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  |  |  |  |  | 5.92% |  |  |
Long-term debt, gross |  |  |  |  |  |  |  | $ 19,505,000 |  |  |
Funds available for borrowing |  |  |  |  |  |  |  | 80,495,000 |  |  |
Revolving Credit Facility | Fixed Rate Note, Due August, 2039 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  |  |  |  |  |  |  |  | 6.70%
Internal rate of return, percentage |  |  |  |  |  |  |  |  |  |  | 8.51%
Revolving Credit Facility | Minimum | Senior secured corporate term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unused capacity, commitment fee percentage |  |  |  |  |  | 0.25% |  |  |  |  |
Revolving Credit Facility | Minimum | Base Rate | Senior secured corporate term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 0.75% |  |  |  |  |
Revolving Credit Facility | Minimum | Secured Overnight Financing Rate (SOFR) | Senior secured corporate term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 1.75% |  |  |  |  |
Revolving Credit Facility | Maximum | Senior secured corporate term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unused capacity, commitment fee percentage |  |  |  |  |  | 0.375% |  |  |  |  |
Revolving Credit Facility | Maximum | Base Rate | Senior secured corporate term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 1.75% |  |  |  |  |
Revolving Credit Facility | Maximum | Secured Overnight Financing Rate (SOFR) | Senior secured corporate term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 2.75% |  |  |  |  |
Line of Credit | Term Loan Due May 27,2028 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  | 6.62% |  |  |  |  |  |  |
Debt issuance costs |  |  |  | $ 402,000 |  |  |  |  |  |  |
Proceeds used to repay revolving credit facility |  |  |  | 8,273,000 |  |  |  |  |  |  |
Original principal amount |  |  |  | $ 12,221,000 |  |  |  |  |  |  |
Line of Credit | Term Loan Due June 2025 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  | 6.87% |  |  |  |  |  |  |
Term Loan | Term Loan Due December 28, 2028 | Secured Debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt |  |  |  |  |  | $ 100,000,000 |  |  |  |  |
Financing Facility | Financing Facility, Due September 2040 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate, percentage |  |  |  | 8.75% |  |  |  |  |  |  |
Financing Facility | Financing Facility, Due September 2040 | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of loan |  |  |  |  |  |  |  | 7,000,000 |  |  |
Aggregate true-up payment amount |  | $ 15,653,000 |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 348,182,000 |  |  |
Proceeds to pay off the construction credit facility |  | $ 25,500,000 |  |  |  |  |  |  |  |  |

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