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v3.26.1

DEBT - Schedule of Unsecured Long-Term Debt Outstanding (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Sep. 30, 2025
--- | --- | ---
Long-term debt, gross |  |
Face Amount | $ 1,877,735 | $ 2,082,880
Unamortized Discount and Debt Issuance Cost | (15,619) | (18,937)
Book Value | 1,862,116 | 2,063,943
Less: current portion of long-term debt |  |
Face Amount | (6,859) | (6,859)
Unamortized Discount and Debt Issuance Cost | 0 | 0
2024 Oman Facility | (6,859) | (6,859)
Total long-term debt, net |  |
Face Amount | 1,870,876 | 2,076,021
Unamortized Discount and Debt Issuance Cost | (15,619) | (18,937)
Long-term debt, net | 1,855,257 | 2,057,084
Unsecured Debt |  |
Long-term debt, gross |  |
Face Amount | 1,800,000 | 1,800,000
Unamortized Discount and Debt Issuance Cost | (13,980) | (16,191)
Book Value | 1,786,020 | 1,783,809
Secured Debt |  |
Long-term debt, gross |  |
Face Amount | 77,735 | 82,880
Unamortized Discount and Debt Issuance Cost | (1,639) | (1,766)
Book Value | 76,096 | 81,114
Due December 1, 2027 |  |
Long-term debt, gross |  |
Face Amount | 350,000 | 350,000
Unamortized Discount and Debt Issuance Cost | (1,554) | (2,326)
Book Value | 348,446 | 347,674
Total long-term debt, net |  |
Long-term debt, net | 348,446 | 347,675
Due December 1, 2029 |  |
Long-term debt, gross |  |
Face Amount | 350,000 | 350,000
Unamortized Discount and Debt Issuance Cost | (2,842) | (3,398)
Book Value | 347,158 | 346,602
Total long-term debt, net |  |
Long-term debt, net | 347,158 | 346,602
Due September 29, 2031 |  |
Long-term debt, gross |  |
Face Amount | 550,000 | 550,000
Unamortized Discount and Debt Issuance Cost | (3,213) | (3,664)
Book Value | 546,787 | 546,336
Total long-term debt, net |  |
Long-term debt, net | 546,787 | 546,336
Due December 1, 2034 |  |
Long-term debt, gross |  |
Face Amount | 550,000 | 550,000
Unamortized Discount and Debt Issuance Cost | (6,371) | (6,803)
Book Value | 543,629 | 543,197
Total long-term debt, net |  |
Long-term debt, net | 543,629 | 543,197
Due January 15, 2027 |  |
Long-term debt, gross |  |
Face Amount | 0 | 200,000
Unamortized Discount and Debt Issuance Cost | 0 | (980)
Book Value | 0 | 199,020
Total long-term debt, net |  |
Long-term debt, net |  | 199,020
Due December 31, 2033 |  |
Long-term debt, gross |  |
Face Amount | 37,212 | 39,789
Unamortized Discount and Debt Issuance Cost | (807) | (888)
Book Value | 36,405 | 38,901
Due December 31, 2034 |  |
Long-term debt, gross |  |
Face Amount | 40,523 | 43,091
Unamortized Discount and Debt Issuance Cost | (832) | (878)
Book Value | $ 39,691 | $ 42,213

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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