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Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Net revenues |  |  |
Revenues |  | $ 252,075 | $ 243,525
Cost of sales: |  |  |
Operating expenses (excluding depreciation and amortization presented below) |  | 31,695 | 24,215
Depreciation and amortization |  | 25,167 | 19,764
Total cost of sales |  | 180,554 | 170,075
Operating expenses related to wholesale business (excluding depreciation and amortization presented below) |  | 221 | 525
General and administrative expenses |  | 4,863 | 7,510
Depreciation and amortization |  | 1,328 | 1,341
Loss on disposal of assets |  | 567 | 142
Total operating costs and expenses |  | 187,533 | 179,593
Operating income |  | 64,542 | 63,932
Interest expense, net |  | 40,229 | 32,581
Income from equity method investments |  | (8,490) | (6,316)
Other income, net |  | (171) | (2)
Total non-operating expenses, net |  | 31,568 | 26,263
Income before income tax expense |  | 32,974 | 37,669
Income tax expense |  | 326 | 302
Net income attributable to partners |  | 32,648 | 37,367
Comprehensive income attributable to partners |  | $ 32,648 | $ 37,367
Net income per limited partner unit: |  |  |
Basic (in dollars per unit) |  | $ 0.74 | $ 0.86
Diluted (in dollars per unit) |  | $ 0.73 | $ 0.86
Weighted average limited partner units outstanding: |  |  |
Basic (in units) |  | 44,406,356 | 43,569,963
Diluted (in units) |  | 44,422,817 | 43,585,297
Cash distributions per limited partner unit (in dollars per unit) |  | $ 1.070 | $ 1.025
Affiliated Entity |  |  |
Net revenues |  |  |
Revenues | [1] | $ 139,625 | $ 124,999
Cost of sales: |  |  |
Cost of materials and other | [1] | 92,882 | 91,071
Third Party |  |  |
Net revenues |  |  |
Revenues |  | 112,450 | 118,526
Cost of sales: |  |  |
Cost of materials and other |  | $ 30,810 | $ 35,025
[1] | See Note 2 for a description of our material affiliate revenue and purchases transactions.

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Used in the calculation of diluted net income or loss per limited partnership unit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
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