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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2023

INCOME TAXES

Components of income tax expense

​

​	​	​	​	​	​	​	​	​	​	​
​	​	Year Ended December 31,
​		2023			2022			2021
​	​	(in thousands)								​
Current:	​	​	​	​	​	​	​	​	​	​
Federal	​	$	15,917	​	$	17,572	​	$	(1)	​
State	​		1,336	​		1,605	​		70	​
​	​		17,253	​		19,177	​		69	​
Deferred:	​	​	​	​	​	​	​	​	​	​
Federal	​		(7,235)	​		33,038	​		356	​
State	​		(1,738)	​		1,763	​		(8)	​
​	​		(8,973)	​		34,801	​		348	​
Income tax expense	​	$	8,280	​	$	53,978	​	$	417	​

Reconciliation from provision for income taxes at U.S. federal statutory rate to effective tax rate

​

​	​	​	​	​	​	​	​	​	​	​
​	​	​	Year Ended December 31,							​
​		2023			2022			2021		​
​	​	(in thousands)								​
Income taxes at statutory rate	​	$	135,335	​	$	134,849	​	$	38,595	​
​	​	​	​	​	​	​	​	​	​	​
Less: Income taxes at statutory rate on Partnership income not subject to income taxes	​		(119,556)	​		(113,925)	​		(37,546)	​
​	​	​	​	​	​	​	​	​	​	​
Increase (decrease) resulting from:	​	​	​	​	​	​	​	​	​	​
State taxes, net of federal income tax	​		864	​		1,492	​		275	​
Change in valuation allowance of deferred tax assets	​		—	​		(317)	​		(834)	​
Deferred taxes related to tax election	​	​	—	​	​	37,253	​	​	—	​
Tax effect of noncontrolling interest income not subject to income taxes	​	​	(1,361)	​	​	(5,399)	​	​	—	​
Return to accrual adjustments	​	​	(7,008)	​	​	69	​	​	(1)	​
Other	​		6	​		(44)	​		(72)	​
Income tax expense	​	$	8,280	​	$	53,978	​	$	417	​

Components of deferred tax liabilities and deferred tax assets

​

​	​	​	​	​	​	​	​
​	​	December 31,
​		2023			2022
​	​	(in thousands)					​
Deferred tax liabilities:	​	​	​	​	​	​	​
Property, plant and equipment	​	$	(36,453)	​	$	(38,349)	​
Total deferred tax liabilities	​	​	(36,453)	​	​	(38,349)	​
​	​	​	​	​	​	​	​
Deferred tax assets:	​	​	​	​	​	​	​
Federal loss carryovers and credits	​	​	4,508	​	​	2,139	​
State loss carryovers and credits	​	​	2,126	​	​	951	​
Capitalized research and development	​	​	2,567	​	​	—	​
Other	​		1,098	​		133	​
Total deferred tax assets	​	​	10,299	​	​	3,223	​
​	​	​	​	​	​	​	​
Overall net deferred tax liabilities	​	$	(26,154)	​	$	(35,126)	​

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- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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