Employee Benefit Plans	3 Months Ended
Mar. 31, 2025
Share-Based Payment Arrangement [Abstract]
Employee Benefit Plans	Employee Benefit Plans In January 2025, the compensation committee approved grants of 301,180 time-vesting phantom units with distribution equivalent rights to the non-employee directors, officers and certain key employees. These phantom units will vest ratably over a three-year period for the officers and key employees and will fully vest on the one-year anniversary of the grant for the non-employee directors. The phantom units will be settled in common units and distribution equivalents will be paid to holders of outstanding phantom units, including unvested phantom units. Additionally, in January 2025, the compensation committee approved target grants of 249,380 performance-vesting phantom units to the officers and certain key employees. These performance-based phantom units will be earned based on the Company’s performance during the 2025 calendar year according to certain performance objectives and will vest in one-half increments on January 31, 2027 and January 31, 2028. Prior to determination of the achievement of the performance objectives, distribution equivalent rights will be paid according to the target number of phantom units grants; following determination of the number of earned phantom units based on achievement of the performance objectives, distribution equivalent rights will be paid according to the number of earned phantom units. The phantom units will be settled in common units and distribution equivalents will be paid to holders of outstanding phantom units, including unvested phantom units. In conjunction with the announcement that Brent W. Clum and Gary D. Simpson were named Co-Chief Executive Officers of the General Partner, effective April 1, 2025, on March 31, 2025, the compensation committee of the Board granted the following awards, effective April 1, 2025, to each of Mr. Clum and Mr. Simpson: (i) 100,000 phantom units which vest on April 1, 2025 and (ii) 100,000 phantom units, along with distribution equivalent rights, which vest on April 1, 2026. In January 2024, the compensation committee approved target grants of 159,475 performance-vesting phantom units to the officers and certain key employees. Based on the results of the Company’s performance during 2024 according to certain performance objectives, 215,977 performance-vesting phantom units were earned and will vest in one-half increments on January 31, 2026 and January 31, 2027. The phantom units will be settled in common units and distribution equivalents will be paid to holders of outstanding phantom units, including unvested phantom units. We recognized compensation expense related to these and prior grants of $2.1 million for the three months ended March 31, 2025 and $1.1 million for the three months ended March 31, 2024. As of March 31, 2025, we had total deferred compensation expense of $17.1 million. For these non-vested unit awards, we estimate that compensation expense for service periods after March 31, 2025 will be $7.2 million in 2025, $6.1 million in 2026, $3.5 million in 2027 and $0.3 million in 2028. The weighted average remaining vesting period is 1.9 years.

In January 2025, the compensation committee approved grants of 301,180 time-vesting phantom units with distribution equivalent rights to the non-employee directors, officers and certain key employees. These phantom units will vest ratably over a three-year period for the officers and key employees and will fully vest on the one-year anniversary of the grant for the non-employee directors. The phantom units will be settled in common units and distribution equivalents will be paid to holders of outstanding phantom units, including unvested phantom units.

Additionally, in January 2025, the compensation committee approved target grants of 249,380 performance-vesting phantom units to the officers and certain key employees. These performance-based phantom units will be earned based on the Company’s performance during the 2025 calendar year according to certain performance objectives and will vest in one-half increments on January 31, 2027 and January 31, 2028. Prior to determination of the achievement of the performance objectives, distribution equivalent rights will be paid according to the target number of phantom units grants; following determination of the number of earned phantom units based on achievement of the performance objectives,

distribution equivalent rights will be paid according to the number of earned phantom units. The phantom units will be settled in common units and distribution equivalents will be paid to holders of outstanding phantom units, including unvested phantom units.

In conjunction with the announcement that Brent W. Clum and Gary D. Simpson were named Co-Chief Executive Officers of the General Partner, effective April 1, 2025, on March 31, 2025, the compensation committee of the Board granted the following awards, effective April 1, 2025, to each of Mr. Clum and Mr. Simpson: (i) 100,000 phantom units which vest on April 1, 2025 and (ii) 100,000 phantom units, along with distribution equivalent rights, which vest on April 1, 2026.

In January 2024, the compensation committee approved target grants of 159,475 performance-vesting phantom units to the officers and certain key employees. Based on the results of the Company’s performance during 2024 according to certain performance objectives, 215,977 performance-vesting phantom units were earned and will vest in one-half increments on January 31, 2026 and January 31, 2027. The phantom units will be settled in common units and distribution equivalents will be paid to holders of outstanding phantom units, including unvested phantom units.

We recognized compensation expense related to these and prior grants of $2.1 million for the three months ended March 31, 2025 and $1.1 million for the three months ended March 31, 2024. As of March 31, 2025, we had total deferred compensation expense of $17.1 million. For these non-vested unit awards, we estimate that compensation expense for service periods after March 31, 2025 will be $7.2 million in 2025, $6.1 million in 2026, $3.5 million in 2027 and $0.3 million in 2028. The weighted average remaining vesting period is 1.9 years.