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v3.25.2

Partners' Capital (Tables) | 6 Months Ended
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Jun. 30, 2025
Partners' Capital Notes [Abstract] |
Summary of quarterly per unit distribution paid | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Payment Date |  | Per Unit Cash Distribution |  | Total Cash Distribution |
​ | ​ | ​ | ​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
February 14, 2024 | ​ | $ | 0.70 | ​ | $ | 91,246 | ​
May 15, 2024 | ​ | ​ | 0.70 | ​ | ​ | 90,736 | ​
August 14, 2024 | ​ | ​ | 0.70 | ​ | ​ | 90,725 | ​
November 14, 2024 | ​ | ​ | 0.70 | ​ | ​ | 90,723 | ​
Total | ​ | $ | 2.80 | ​ | $ | 363,430 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
February 14, 2025 | ​ | $ | 0.70 | ​ | $ | 90,891 | ​
May 15, 2025 | ​ | ​ | 0.70 | ​ | ​ | 90,739 | ​
August 14, 2025 (1) | ​ | ​ | 0.60 | ​ | ​ | ​ | ​
Total | ​ | $ | 2.00 | ​ | $ | 181,630 | ​
​
(1) | On July 28, 2025, we declared this quarterly distribution payable on August 14, 2025 to all unitholders of record as of August 7, 2025.
Summary of changes to Partners' Capital | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | Limited | ​ | Other | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Limited Partner | ​ | Partners' | ​ | Comprehensive | ​ | Noncontrolling | ​ | Total Partners' | ​
​ |  | Units |  | Capital |  | Income (Loss) |  | Interest |  | Capital |
​ | ​ | (in thousands, except unit data) | ​
Balance at January 1, 2025 |  | 128,061,981 | ​ | $ | 1,867,850 | ​ | $ | (35,103) | ​ | $ | 20,786 | ​ | $ | 1,853,533 | ​
Comprehensive income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income |  | — | ​ |  | 73,983 | ​ |  | — | ​ | ​ | 1,577 |  |  | 75,560 | ​
Other comprehensive income |  | — | ​ |  | — | ​ |  | 270 | ​ |  | — |  |  | 270 | ​
Total comprehensive income |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | 75,830 | ​
Settlement of deferred compensation plans | ​ | 366,043 | ​ | ​ | (7,082) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (7,082) | ​
Common unit-based compensation |  | — | ​ |  | 1,964 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,964 | ​
Distributions on deferred common unit-based compensation |  | — | ​ |  | (1,247) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1,247) | ​
Distributions from consolidated company to noncontrolling interest | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1,894) | ​ | ​ | (1,894) | ​
Distributions to Partners |  | — | ​ | ​ | (89,644) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (89,644) | ​
Balance at March 31, 2025 | ​ | 128,428,024 | ​ | ​ | 1,845,824 | ​ | ​ | (34,833) | ​ | ​ | 20,469 | ​ | ​ | 1,831,460 | ​
Comprehensive income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income |  | — | ​ |  | 59,410 | ​ |  | — | ​ | ​ | 1,615 |  |  | 61,025 | ​
Other comprehensive income |  | — | ​ |  | — | ​ |  | 11,194 | ​ |  | — |  |  | 11,194 | ​
Total comprehensive income |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | 72,219 | ​
Common unit-based compensation |  | — | ​ |  | 2,281 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,281 | ​
Distributions on deferred common unit-based compensation |  | — | ​ |  | (841) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (841) | ​
Distributions from consolidated company to noncontrolling interest | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,731) | ​ | ​ | (2,731) | ​
Distributions to Partners |  | — | ​ | ​ | (89,898) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (89,898) | ​
Balance at June 30, 2025 | ​ | 128,428,024 | ​ | $ | 1,816,776 | ​ | $ | (23,639) | ​ | $ | 19,353 | ​ | $ | 1,812,490 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | Limited | ​ | Other | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Limited Partner | ​ | Partners' | ​ | Comprehensive | ​ | Noncontrolling | ​ | Total Partners' | ​
​ |  | Units |  | Capital |  | Income (Loss) |  | Interest |  | Capital |
​ | ​ | (in thousands, except unit data) | ​
Balance at January 1, 2024 |  | 127,125,437 | ​ | $ | 1,896,027 | ​ | $ | (61,525) | ​ | $ | 24,095 | ​ | $ | 1,858,597 | ​
Cumulative-effect adjustment | ​ | — | ​ | ​ | 6,232 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,232 | ​
Comprehensive income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income |  | — | ​ |  | 158,057 | ​ |  | — | ​ | ​ | 1,510 |  |  | 159,567 | ​
Actuarially determined long-term liability adjustments |  | — | ​ |  | — | ​ |  | 923 | ​ |  | — |  |  | 923 | ​
Total comprehensive income |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | 160,490 | ​
Settlement of deferred compensation plans | ​ | 936,544 | ​ | ​ | (13,292) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (13,292) | ​
Common unit-based compensation |  | — | ​ |  | 2,604 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,604 | ​
Distributions on deferred common unit-based compensation |  | — | ​ |  | (2,261) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,261) | ​
Distributions from consolidated company to noncontrolling interest | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1,981) | ​ | ​ | (1,981) | ​
Distributions to Partners |  | — | ​ | ​ | (88,985) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (88,985) | ​
Balance at March 31, 2024 |  | 128,061,981 | ​ | ​ | 1,958,382 | ​ | ​ | (60,602) | ​ | ​ | 23,624 | ​ | ​ | 1,921,404 | ​
Comprehensive income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income |  | — | ​ |  | 100,187 | ​ |  | — | ​ | ​ | 1,322 |  |  | 101,509 | ​
Actuarially determined long-term liability adjustments |  | — | ​ |  | — | ​ |  | 957 | ​ |  | — |  |  | 957 | ​
Total comprehensive income |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | 102,466 | ​
Common unit-based compensation |  | — | ​ |  | 2,926 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,926 | ​
Distributions on deferred common unit-based compensation |  | — | ​ |  | (1,091) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1,091) | ​
Distributions from consolidated company to noncontrolling interest | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1,942) | ​ | ​ | (1,942) | ​
Distributions to Partners |  | — | ​ | ​ | (89,645) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (89,645) | ​
Balance at June 30, 2024 |  | 128,061,981 | ​ | $ | 1,970,759 | ​ | $ | (59,645) | ​ | $ | 23,004 | ​ | $ | 1,934,118 | ​
​

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