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Business Segments (Tables)
3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Schedule of Financial Information of Partnership's Operating Segments
The following tables present selected financial information with respect to the Partnership's operating segments for the three months ended March 31, 2025 and 2024.
Terminalling and StorageTransportationSulfur ServicesSpecialty ProductsIndirect selling, general and administrativeTotal
Three Months Ended March 31, 2025:
Operating revenues from external customers$21,549 $52,985 $48,704 $69,305 $— $192,543 
Intersegment operating revenues 1,865 4,490 — 23 — 6,378 
Total segment revenues23,414 57,475 48,704 69,328 — 198,921 
Reconciliation of revenues:
Elimination of intersegment revenues(1,865)(4,490)— (23)— (6,378)
Total consolidated revenues21,549 52,985 48,704 69,305 — 192,543 
Less: cost of products sold:
Direct product costs— — 26,819 57,627 — 84,446 
Manufacturing costs (plant, labor, transportation, and other)— — 5,183 5,418 — 10,601 
Segment gross margin23,414 57,475 16,702 6,283 — 103,874 
Less:
Employment related expenses2
6,552 15,254 2,163 1,452 3,094 28,515 
Driver pay — 12,081 — — — 12,081 
Pass-through expenses— 6,097 864 — — 6,961 
Utilities, materials, and supplies3,634 609 255 27 — 4,525 
Repairs and maintenance1,399 4,494 208 — 6,102 
Insurance related expenses1,471 3,950 160 34 89 5,704 
Lease expenses1,156 4,636 125 22 — 5,939 
Other segment expenses1
1,524 2,394 1,654 244 1,492 7,308 
Depreciation and amortization5,569 2,932 3,557 758 — 12,816 
(Gain) loss on sale or disposition of property, plant and equipment(1)(478)— — — (479)
21,304 51,969 8,986 2,538 4,675 89,472 
Operating income (loss)$2,110 $5,506 $7,716 $3,745 $(4,675)$14,402 
Segment assets - as of March 31, 2025$166,644 $169,819 $131,702 $65,245 $— $533,410 
Capital expenditures and plant turnaround costs$922 $2,822 $1,741 $123 $— $5,608 
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
Three Months Ended March 31, 2024:
Operating revenues from external customers$22,517 $58,307 $33,681 $66,325 $— $180,830 
Intersegment operating revenues 1,768 3,735 — 21 — 5,524 
Total segment revenues24,285 62,042 33,681 66,346 — 186,354 
Reconciliation of revenues:
Elimination of intersegment revenues(1,768)(3,735)— (21)— (5,524)
Total consolidated revenues22,517 58,307 33,681 66,325 — 180,830 
— 
Less: cost of products sold:
Direct product costs— — 18,444 54,185 — 72,629 
Manufacturing costs (plant, labor, transportation, and other)18 — 4,326 5,459 — 9,803 
Segment gross margin24,267 62,042 10,911 6,702 — 103,922 
Less:
Employment related expenses2
5,580 14,741 1,835 1,021 3,130 26,307 
Driver pay — 12,698 — — — 12,698 
Pass-through expenses— 7,173 697 — — 7,870 
Utilities, materials, and supplies4,067 512 209 31 — 4,819 
Repairs and maintenance1,387 4,460 141 — 5,991 
Insurance related expenses1,496 3,195 171 26 — 4,888 
Lease expenses966 3,872 87 38 — 4,963 
Other segment expenses1
1,821 2,189 1,104 229 706 6,049 
Depreciation and amortization5,395 3,476 2,982 796 — 12,649 
(Gain) loss on sale or disposition of property, plant and equipment(102)(105)— — — (207)
20,610 52,211 7,226 2,144 3,836 86,027 
Operating income (loss)$3,657 $9,831 $3,685 $4,558 $(3,836)$17,895 
Segment assets - as of March 31, 2024$171,078 $158,127 $107,519 $75,353 $— $512,077 
Capital expenditures and plant turnaround costs$7,050 $2,855 $6,336 $1,152 $— $17,393 
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.