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Business Segments
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Business Segments BUSINESS SEGMENTS
    The Partnership has four reportable segments: terminalling and storage, natural gas liquids, transportation, and sulfur services. The Partnership’s reportable segments are strategic business units that offer different products and services. The operating income of these segments is reviewed by the chief operating decision maker to assess performance and make business decisions.

The accounting policies of the operating segments are the same as those described in Note 2. The Partnership evaluates the performance of its reportable segments based on operating income. There is no allocation of interest expense.
Operating RevenuesIntersegment EliminationsOperating Revenues After EliminationsDepreciation and AmortizationOperating Income (Loss) after EliminationsCapital Expenditures and Plant Turnaround Costs
Year Ended December 31, 2021:
Terminalling and storage$185,629 $(6,597)$179,032 $28,210 $10,785 $9,582 
Natural gas liquids414,043 — 414,043 2,390 38,098 537 
Sulfur services145,042 — 145,042 10,432 32,972 7,813 
Transportation161,180 (16,866)144,314 15,719 (8,446)4,997 
Indirect selling, general, and administrative— — — — (16,129)— 
Total$905,894 $(23,463)$882,431 $56,751 $57,280 $22,929 
Year Ended December 31, 2020:
Terminalling and storage$191,041 $(6,877)$184,164 $29,489 $22,153 $11,619 
Natural gas liquids247,484 (5)247,479 2,456 22,104 395 
Sulfur services108,020 (13)108,007 12,012 36,256 7,415 
Transportation150,285 (17,793)132,492 17,505 (16,102)7,348 
Indirect selling, general, and administrative— — — — (17,909)— 
Total$696,830 $(24,688)$672,142 $61,462 $46,502 $26,777 
Year Ended December 31, 2019:
Terminalling and storage$216,313 $(6,659)$209,654 $30,952 $16,732 $12,987 
Natural gas liquids366,502 — 366,502 2,469 44,020 1,870 
Sulfur services111,340 — 111,340 11,332 22,721 14,853 
Transportation183,740 (24,118)159,622 15,307 (7,388)8,213 
Indirect selling, general, and administrative— — — — (17,981)— 
Total$877,895 $(30,777)$847,118 $60,060 $58,104 $37,923 

Revenues from one customer in the Natural Gas Liquids segment was $140,324, $74,722 and $112,280 for the years ended December 31, 2021, 2020 and 2019, respectively.

The Partnership's assets by reportable segment as of December 31, 2021 and 2020 are as follows:
20212020
Total assets:
Terminalling and storage
$248,194 $252,794 
Natural gas liquids
78,483 80,737 
Sulfur services
108,007 94,154 
Transportation
145,177 151,953 
Total assets
$579,861 $579,638