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Selected Quarterly Financial Data | 12 Months Ended
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Sep. 30, 2025
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data | 21) Selected Quarterly Financial Data (unaudited)
|  | Three Months Ended |  |  |  |
|  | Dec. 31, |  |  | Mar. 31, |  |  | Jun. 30, |  |  | Sep. 30, |  |  |  |
(in thousands - except per unit data) |  | 2024 |  |  | 2025 |  |  | 2025 |  |  | 2025 |  |  | Total |
Sales |  | $ | 488,063 |  |  | $ | 743,045 |  |  | $ | 305,618 |  |  | $ | 247,692 |  |  | $ | 1,784,418 |
Gross profit for product, installations and services |  |  | 157,699 |  |  |  | 259,885 |  |  |  | 85,857 |  |  |  | 59,425 |  |  |  | 562,866 |
Operating income (loss) |  |  | 49,219 |  |  |  | 125,372 |  |  |  | (19,177 | ) |  |  | (40,943 | ) |  |  | 114,471 |
Income (loss) before income taxes |  |  | 45,908 |  |  |  | 120,678 |  |  |  | (23,090 | ) |  |  | (40,594 | ) |  |  | 102,902 |
Net income (loss) |  |  | 32,884 |  |  |  | 85,911 |  |  |  | (16,629 | ) |  |  | (28,671 | ) |  |  | 73,495 |
Limited Partner interest in net income (loss) |  |  | 32,577 |  |  |  | 85,109 |  |  |  | (16,472 | ) |  |  | (28,396 | ) |  |  | 72,818 |
Net income (loss) per Limited Partner unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted (a) |  | $ | 0.79 |  |  | $ | 2.01 |  |  | $ | (0.48 | ) |  | $ | (0.84 | ) |  | $ | 1.82 |
|  | Three Months Ended |  |  |  |
|  | Dec. 31, |  |  | Mar. 31, |  |  | Jun. 30, |  |  | Sep. 30, |  |  |  |
(in thousands - except per unit data) |  | 2023 |  |  | 2024 |  |  | 2024 |  |  | 2024 |  |  | Total |
Sales |  | $ | 528,096 |  |  | $ | 666,032 |  |  | $ | 331,640 |  |  | $ | 240,331 |  |  | $ | 1,766,099 |
Gross profit for product, installations and services |  |  | 149,651 |  |  |  | 206,046 |  |  |  | 88,247 |  |  |  | 57,880 |  |  |  | 501,824 |
Operating income (loss) |  |  | 21,621 |  |  |  | 100,331 |  |  |  | (12,291 | ) |  |  | (48,559 | ) |  |  | 61,102 |
Income (loss) before income taxes |  |  | 18,153 |  |  |  | 96,244 |  |  |  | (15,201 | ) |  |  | (50,642 | ) |  |  | 48,554 |
Net income (loss) |  |  | 12,979 |  |  |  | 68,374 |  |  |  | (11,044 | ) |  |  | (35,086 | ) |  |  | 35,223 |
Limited Partner interest in net income (loss) |  |  | 12,861 |  |  |  | 67,754 |  |  |  | (10,943 | ) |  |  | (34,760 | ) |  |  | 34,912 |
Net income (loss) per Limited Partner unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted (a) |  | $ | 0.32 |  |  | $ | 1.56 |  |  | $ | (0.31 | ) |  | $ | (1.00 | ) |  | $ | 0.90 |
(a) The sum of the quarters do not add-up to the total due to the weighting of Limited Partner Units outstanding, rounding or the theoretical effects of FASB ASC 260-10-45-60 to Master Limited Partners earnings per unit.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1B Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 270 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/270/tableOfContent + Details
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