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Business Segments (Tables)
12 Months Ended
Dec. 31, 2024
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
The following tables present selected financial information with respect to the Partnership's operating segments for the years ended December 31, 2024, 2023 and 2022.
Terminalling and StorageTransportationSulfur ServicesSpecialty ProductsIndirect selling, general and administrativeTotal
Year Ended December 31, 2024:
Operating revenues from external customers$89,067 $223,934 $129,771 $264,850 $— $707,622 
Intersegment operating revenues 7,488 15,873 95 — 23,457 
Total segment revenues96,555 239,807 129,772 264,945 — 731,079 
Reconciliation of revenues:
Elimination of intersegment revenues(7,488)(15,873)(1)(95)— (23,457)
Total consolidated revenues89,067 223,934 129,771 264,850 — 707,622 
Less: cost of products sold:
Direct product costs— — 58,102 217,866 — 275,968 
Manufacturing costs (plant, labor, transportation, and other)72 — 21,882 19,536 — 41,490 
Segment gross margin96,483 239,807 49,788 27,543 — 413,621 
Less:
Employment related expenses2
25,714 60,882 9,148 5,941 12,267 113,952 
Driver pay — 50,573 — — — 50,573 
Pass-through expenses— 24,454 2,925 — — 27,379 
Utilities, materials, and supplies13,591 2,254 794 137 — 16,776 
Repairs and maintenance5,776 18,219 706 15 — 24,716 
Insurance related expenses6,914 15,083 730 125 825 23,677 
Lease expenses4,268 16,548 414 121 — 21,351 
Other segment expenses1
7,470 9,296 4,473 996 6,464 28,699 
Depreciation and amortization22,757 13,027 11,769 3,234 — 50,787 
(Gain) loss on sale or disposition of property, plant and equipment(1,105)(713)298 (64)— (1,584)
85,385 209,623 31,257 10,505 19,556 356,326 
Operating income (loss)$11,098 $30,184 $18,531 $17,038 $(19,556)$57,295 
Segment assets$180,769 $165,093 $126,074 $66,573 $— $538,509 
Capital expenditures and plant turnaround costs$13,764 $9,188 $26,380 $3,291 $— $52,623 
1 Other segment expenses include outside services, property taxes, terminalling fees, regulatory expenses, professional fees, communications expenses, and many other less significant expense categories used in operations. The Unallocated SG&A amount includes $3,674 in transaction expenses associated with the terminated Merger with Martin Resource Management Corporation. See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Significant Recent Developments – Termination of Merger Agreement.”

2 These employment expenses include allocated overhead from Martin Resource Management Corporation and exclude those that are part of our manufacturing operations. Payroll expenses in our manufacturing operations are included in cost of products sold.
Terminalling and StorageTransportationSulfur ServicesSpecialty ProductsIndirect selling, general and administrativeTotal
Year Ended December 31, 2023:
Operating revenues from external customers$86,514 $223,677 $140,995 $346,777 $— $797,963 
Intersegment operating revenues 8,945 17,249 — 86 — 26,280 
Total segment revenues95,459 240,926 140,995 346,863 — 824,243 
Reconciliation of revenues:
Elimination of intersegment revenues(8,945)(17,249)— (86)— (26,280)
Total consolidated revenues86,514 223,677 140,995 346,777 — 797,963 
— 
Less: cost of products sold:
Direct product costs— — 75,002 294,005 — 369,007 
Manufacturing costs (plant, labor, transportation, and other)75 — 18,839 25,195 — 44,109 
Segment gross margin95,384 240,926 47,154 27,663 — 411,127 
Less:
Employment related expenses2
23,018 56,244 7,997 5,463 12,755 105,477 
Driver pay — 52,650 — — 52,650 
Pass-through expenses— 27,196 3,657 — 30,853 
Utilities, materials, and supplies16,863 2,134 1,225 157 20,379 
Repairs and maintenance4,259 22,582 340 45 27,226 
Insurance related expenses4,525 14,056 759 122 19,462 
Lease expenses3,779 11,544 375 135 15,833 
Other segment expenses1
7,019 7,715 4,716 1,276 3,275 24,001 
Depreciation and amortization21,030 14,879 10,690 3,296 — 49,895 
(Gain) loss on sale or disposition of property, plant and equipment359 (1,775)(17)60 — (1,373)
80,852 207,225 29,742 10,554 16,030 344,403 
Operating income (loss)$14,532 $33,701 $17,412 $17,109 $(16,030)$66,724 
Segment assets$171,320 $161,506 $103,779 $72,770 $— $509,375 
Capital expenditures and plant turnaround costs$13,168 $7,598 $16,851 $2,519 $— $40,136 
1 Other segment expenses include outside services, property taxes, terminalling fees, regulatory expenses, professional fees, communications expenses, and many other less significant expense categories used in operations.

2 These employment expenses include allocated overhead from Martin Resource Management Corporation and exclude those that are part of our manufacturing operations. Payroll expenses in our manufacturing operations are included in cost of products sold.
Terminalling and StorageTransportationSulfur ServicesSpecialty ProductsIndirect selling, general and administrativeTotal
Year Ended December 31, 2022:
Operating revenues from external customers$80,193 $219,008 $179,164 $540,513 $— $1,018,878 
Intersegment operating revenues 12,419 20,267 — 123 — 32,809 
Total segment revenue92,612 239,275 179,164 540,636 — 1,051,687 
Reconciliation of revenues:
Elimination of intersegment revenues(12,419)(20,267)— (123)— (32,809)
Total consolidated revenues80,193 219,008 179,164 540,513 — 1,018,878 
— 
Less: cost of products sold:
Direct product costs— — 96,793 479,301 — 576,094 
Manufacturing costs (plant, labor, transportation, and other)19 — 30,225 46,742 — 76,986 
Segment gross margin92,593 239,275 52,146 14,593 — 398,607 
Less:
Employment related expenses2
22,612 50,626 8,137 7,200 13,715 102,290 
Driver pay — 52,178 — — 52,178 
Pass-through expenses13 33,998 4,332 — 38,343 
Utilities, materials, and supplies17,996 2,172 1,131 180 21,479 
Repairs and maintenance3,937 20,900 613 61 25,511 
Insurance related expenses4,964 10,499 1,115 194 16,774 
Lease expenses8,432 6,352 303 143 15,230 
Other segment expenses1
7,190 7,688 5,785 1,068 3,197 24,928 
Depreciation and amortization26,094 14,567 11,099 4,520 — 56,280 
(Gain) loss on sale of property, plant and equipment166 (1,062)(4,555)(218)— (5,669)
91,404 197,918 27,960 13,148 16,914 347,344 
Operating income (loss)$1,189 $41,357 $24,186 $1,445 $(16,914)$51,263 
Segment assets$184,537 $153,451 $110,688 $150,175 $— $598,851 
Capital expenditures and plant turnaround costs$15,308 $7,619 $6,857 $1,349 $— $31,133 
1 Other segment expenses include outside services, property taxes, terminalling fees, regulatory expenses, professional fees, communications expenses, and many other less significant expense categories used in operations.

2 These employment expenses include allocated overhead from Martin Resource Management Corporation and exclude those that are part of our manufacturing operations. Payroll expenses in our manufacturing operations are included in cost of products sold.