v3.26.1
Earnings Per Limited Partner Unit - Net Income Allocation and Per Unit Data (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Basic and Diluted Earnings Per Limited Partner:        
Net income (loss) $ (27,989) $ (16,629) $ 116,084 $ 102,166
Less General Partner's interest in net income (loss) (275) (157) 1,137 952
Net income (loss) available to limited partners (27,714) (16,472) 114,947 101,214
Less dilutive impact of theoretical distribution of earnings [1] 0 0 19,351 16,739
Limited Partner's interest in net income (loss) $ (27,714) $ (16,472) $ 95,596 $ 84,475
Per unit data:        
Basic and diluted net income (loss) available to limited partners $ (0.84) $ (0.48) $ 3.49 $ 2.93
Less dilutive impact of theoretical distribution of earnings [1] 0 0 0.59 0.48
Limited Partner's interest in net income (loss) [2] $ (0.84) $ (0.48) $ 2.9 $ 2.45
Weighted average number of Limited Partner units outstanding, Basic 32,835 34,340 32,935 34,498
Weighted average number of Limited Partner units outstanding, Diluted 32,835 34,340 32,935 34,498
[1] In any accounting period where the Company’s aggregate net income exceeds its aggregate distribution for such period, the Company is required to present net income per Limited Partner unit as if all of the earnings for the period were distributed, based on the terms of the Partnership agreement, regardless of whether those earnings would actually be distributed during a particular period from an economic or practical perspective. This allocation does not impact the Company’s overall net income or other financial results.
[2] See Note 15 - Earnings Per Limited Partner Unit.