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Income Taxes
 9 Months Ended
Sep. 30, 2024
Income Tax Disclosure [Abstract]  
Income Taxes INCOME TAXES
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Provision for income taxes$1,066 $788 $3,634 $3,619 

The operations of a partnership are generally not subject to income taxes, except for Texas margin tax, because its income is taxed directly to its partners. Current state income taxes attributable to the Texas margin tax relating to the operation of the Partnership of $270 and $120 were recorded in income tax expense for the three months ended September 30, 2024 and 2023, respectively. Current state income taxes attributable to the Texas margin tax relating to the operation of the Partnership of $820 and $320 were recorded in income tax expense for the nine months ended September 30, 2024 and 2023, respectively. Deferred taxes applicable to the Texas margin tax relating to the operation of the Partnership are immaterial.

MTI, a wholly owned subsidiary of the Partnership, is subject to income taxes due to its corporate structure (the "Taxable Subsidiary"). Total income tax expense of $796 and $668, related to the operation of the Taxable Subsidiary, for the three months ended September 30, 2024 and 2023, resulted in an effective income tax rate ("ETR") of 33.36% and 23.96%, respectively. Total income tax expense of $2,814 and $3,299, related to the operation of the Taxable Subsidiary, for the nine months ended September 30, 2024 and 2023, resulted in an ETR of 25.17% and 24.88%, respectively.

The increase in the provision for income taxes and the ETR for the income taxes during the three months ended September 30, 2024, was primarily due to an increase in permanent differences, compared to the same period in 2023. The decrease in the provision for income taxes during the nine months ended September 30, 2024, was primarily due to a favorable true-up to state net operating loss carryforwards, compared to the same period in 2023. The increase in the ETR for the income taxes during the nine months ended September 30, 2024, was primarily due to a decrease in income before income taxes in the current period, compared to the same period in 2023.

    A current federal income tax expense of $471 and $179, related to the operation of the Taxable Subsidiary, was recorded for the three months ended September 30, 2024 and 2023, respectively. A current federal income tax expense of $2,047 and $666, related to the operation of the Taxable Subsidiary, was recorded for the nine months ended September 30, 2024 and 2023, respectively. A current state income tax expense of $194 and $33, related to the operation of the Taxable
Subsidiary, was recorded for the three months ended September 30, 2024 and 2023, respectively. A current state income tax expense of $610 and $311, related to the operation of the Taxable Subsidiary, was recorded for the nine months ended September 30, 2024 and 2023, respectively.

With respect to MTI, income taxes are accounted for under the asset and liability method pursuant to the provisions of ASC 740 related to income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

    A deferred tax expense related to the MTI temporary differences of $131 and $456 was recorded for the three months ended September 30, 2024 and 2023, respectively. A deferred tax expense related to the MTI temporary differences of $157 and $2,322 was recorded for the nine months ended September 30, 2024 and 2023, respectively. A net deferred tax asset of $10,043 and $10,200, related to the cumulative book and tax temporary differences, existed at September 30, 2024 and December 31, 2023, respectively.

    All income tax positions taken for all open years are more likely than not to be sustained based upon their technical merit under applicable tax laws.