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DEBT - Narrative (Details) ر.ع. in Millions |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 17, 2024 USD ($) | Aug. 14, 2024 USD ($) extension | Jun. 30, 2026 USD ($) | Jun. 30, 2026 USD ($) | Sep. 30, 2025 USD ($) | Jun. 30, 2026 OMR (ر.ع.) | Jun. 19, 2023 USD ($) | Sep. 29, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 1,877,735,000 | $ 1,877,735,000 | $ 2,082,880,000 |  |  |
Book Value |  |  | 1,862,116,000 | 1,862,116,000 | 2,063,943,000 |  |  |
Current portion of long-term debt, net |  |  | 6,859,000 | $ 6,859,000 | 6,859,000 |  |  |
Revolving commitments under amended credit facility expire |  | $ 775,000,000.0 |  |  |  |  |  |
Secured Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | 400,000,000.0 |  |  |  |  |  |
Debt term after funding |  |  |  | 2 years |  |  |  |
Debt extinguishment expense |  |  | 140,000,000.0 | $ 200,000,000.0 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | 950,000,000.0 |  |  |  |  |  |
Revolving commitments under amended credit facility mature |  | $ 175,000,000.0 |  |  |  |  |  |
Line of credit, number of loan extensions | extension |  | 2 |  |  |  |  |  |
Credit facility maturity term |  | 1 year |  |  |  |  |  |
Line of credit facility accordion increase |  | $ 100,000,000.0 |  |  |  |  |  |
Notes | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount of debt | $ 1,250,000,000 |  |  |  |  |  |  |
Senior Notes Due 2027 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount of debt | $ 350,000,000.0 |  |  |  |  |  |  |
Interest rate (as a percent) | 4.65% |  |  |  |  |  |  |
Debt instrument, redemption price, percentage | 99.958% |  |  |  |  |  |  |
Senior Notes Due 2029 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount of debt | $ 350,000,000.0 |  |  |  |  |  |  |
Interest rate (as a percent) | 4.85% |  |  |  |  |  |  |
Debt instrument, redemption price, percentage | 99.883% |  |  |  |  |  |  |
Senior Notes Due 2034 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount of debt | $ 550,000,000.0 |  |  |  |  |  |  |
Interest rate (as a percent) | 5.50% |  |  |  |  |  |  |
Debt instrument, redemption price, percentage | 99.67% |  |  |  |  |  |  |
Due September 29, 2031 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  | $ 550,000,000.0
Interest rate (as a percent) |  |  |  |  |  |  |  | 2.90%
Long-term debt |  |  | 550,000,000 | 550,000,000 | 550,000,000 |  |  |
Book Value |  |  | $ 546,787,000 | $ 546,787,000 | $ 546,336,000 |  |  |
Term Loan Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  | 5.143% | 5.329% |  |  |  |
Term Loan Credit Facility | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, commitment fee percentage (as a percent) |  | 0.10% |  |  |  |  |  |
Term Loan Credit Facility | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, commitment fee percentage (as a percent) |  | 0.25% |  |  |  |  |  |
Term Loan Credit Facility | Adjusted Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.10% |  |  |  |  |  |
Term Loan Credit Facility | Fed Funds Effective Rate Overnight Index Swap Rate |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.50% |  |  |  |  |  |
Term Loan Credit Facility | One Month Adjusted Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 1.00% |  |  |  |  |  |
Term Loan Credit Facility | Secured Overnight Financing Rate (SOFR) Applicable Margin Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 1.00% |  |  |  |  |  |
Term Loan Credit Facility | Secured Overnight Financing Rate (SOFR) Applicable Margin Rate | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 1.625% |  |  |  |  |  |
Term Loan Credit Facility | Adjusted Base Rate, Applicable Margin Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.00% |  |  |  |  |  |
Term Loan Credit Facility | Adjusted Base Rate, Applicable Margin Rate | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.625% |  |  |  |  |  |
2024 Oman Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  | 5.00% |  |  |
Interest rate spread (as a percent) |  |  |  |  | 1.75% |  |  |
Long-term debt |  |  | $ 45,500,000 | $ 45,500,000 |  | ر.ع. 17.6 |  |
Debt instrument, interest rate, fixed percentage (as a percent) |  |  |  |  | 6.00% |  |  |
Debt instrument, interest rate period one |  |  |  |  | 2 years |  |  |
Repayments of lines of credit |  |  | 900,000 | 2,600,000 |  |  |  |
Book Value |  |  | 40,500,000 | $ 40,500,000 |  |  |  |
Debt service coverage ratio |  |  |  | 1.20 |  |  |  |
2023 Oman Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  | 5.00% |  |  |
Interest rate spread (as a percent) |  |  |  |  | 1.75% |  |  |
Long-term debt |  |  | 37,200,000 | $ 37,200,000 |  | ر.ع. 17.6 | $ 45,600,000 |
Debt instrument, interest rate, fixed percentage (as a percent) |  |  |  |  | 6.00% |  |  |
Debt instrument, interest rate period one |  |  |  |  | 2 years |  |  |
Repayments of lines of credit |  |  | 900,000 | $ 2,600,000 |  |  |  |
Debt service coverage ratio |  |  |  | 1.20 |  |  |  |
Current portion of long-term debt, net |  |  | 3,400,000 | $ 3,400,000 |  |  |  |
2023 Oman Facility | Short-Term Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 3,400,000 |  |  |  |
2018 Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Commitment fee rate (as a percent) |  |  |  | 0.15% |  |  |  |
Maximum limit of priority debt on net worth |  | 17.50% |  |  |  |  |  |
Borrowings outstanding |  |  | 0 | $ 0 |  |  |  |
Available borrowing capacity |  |  | $ 950,000,000.0 | $ 950,000,000.0 |  |  |  |
2018 Credit Facility | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Commitment fee rate (as a percent) |  | 0.075% |  |  |  |  |  |
2018 Credit Facility | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Commitment fee rate (as a percent) |  | 0.20% |  |  |  |  |  |
Total debt to total capitalization ratio (as a percent) |  | 55.00% |  |  |  |  |  |
2018 Credit Facility | Fed Funds Effective Rate Overnight Index Swap Rate |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.50% |  |  |  |  |  |
2018 Credit Facility | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.10% |  |  |  |  |  |
Spread over SOFR (as a percent) |  |  | 1.25% | 1.25% |  | 1.25% |  |
2018 Credit Facility | Secured Overnight Financing Rate (SOFR) | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.875% |  |  |  |  |  |
2018 Credit Facility | Secured Overnight Financing Rate (SOFR) | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 1.50% |  |  |  |  |  |
2018 Credit Facility | One Month Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 1.00% |  |  |  |  |  |
2018 Credit Facility | Base Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.00% |  |  |  |  |  |
2018 Credit Facility | Base Rate | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.50% |  |  |  |  |  |
Unsecured Standalone Line of Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 420,000,000.0 | $ 420,000,000.0 |  |  |  |
Borrowings outstanding |  |  | $ 264,700,000 | $ 264,700,000 |  |  |  |

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