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Revenues (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Disaggregation of Revenue [Line Items]          
Property, plant and equipment $ 301,545   $ 301,545   $ 312,562
Total revenue 155,342 $ 166,280 307,825 $ 334,201  
Amortization of customer contract intangible assets 1,800 1,800 3,605 2,400  
Service Revenue - Third Party          
Disaggregation of Revenue [Line Items]          
Total revenue 7,661 4,207 11,755 8,767  
Service Revenue - Affiliate          
Disaggregation of Revenue [Line Items]          
Total revenue   37,741   67,204  
Product Revenue - Third Party          
Disaggregation of Revenue [Line Items]          
Total revenue 85,763 108,993 171,187 210,710  
Product Revenue - Affiliate          
Disaggregation of Revenue [Line Items]          
Total revenue 7,187 794 16,573 21,028  
Lease Revenue - Affiliate (1) (2)          
Disaggregation of Revenue [Line Items]          
Total revenue 54,731 [1],[2] 14,545 [3] 108,310 [4],[5] 26,492 [6]  
Pipelines and transportation          
Disaggregation of Revenue [Line Items]          
Property, plant and equipment 242,474   242,474    
Total revenue 44,208 37,744 84,841 71,457  
Pipelines and transportation | Service Revenue - Third Party          
Disaggregation of Revenue [Line Items]          
Total revenue 7,477 3,714 11,451 7,965  
Pipelines and transportation | Service Revenue - Affiliate          
Disaggregation of Revenue [Line Items]          
Total revenue   23,160   43,057  
Pipelines and transportation | Product Revenue - Third Party          
Disaggregation of Revenue [Line Items]          
Total revenue 0 0 0 0  
Pipelines and transportation | Product Revenue - Affiliate          
Disaggregation of Revenue [Line Items]          
Total revenue 0 0 0 0  
Pipelines and transportation | Lease Revenue - Affiliate (1) (2)          
Disaggregation of Revenue [Line Items]          
Total revenue 36,731 [1],[2] 10,870 [3] 73,390 [4],[5] 20,435 [6]  
Wholesale marketing and terminalling          
Disaggregation of Revenue [Line Items]          
Property, plant and equipment 59,071   59,071    
Total revenue 111,134 128,536 222,984 262,744  
Wholesale marketing and terminalling | Service Revenue - Third Party          
Disaggregation of Revenue [Line Items]          
Total revenue 184 493 304 802  
Wholesale marketing and terminalling | Service Revenue - Affiliate          
Disaggregation of Revenue [Line Items]          
Total revenue   14,581   24,147  
Wholesale marketing and terminalling | Product Revenue - Third Party          
Disaggregation of Revenue [Line Items]          
Total revenue 85,763 108,993 171,187 210,710  
Wholesale marketing and terminalling | Product Revenue - Affiliate          
Disaggregation of Revenue [Line Items]          
Total revenue 7,187 794 16,573 21,028  
Wholesale marketing and terminalling | Lease Revenue - Affiliate (1) (2)          
Disaggregation of Revenue [Line Items]          
Total revenue 18,000 [1],[2] $ 3,675 [3] 34,920 [4],[5] $ 6,057 [6]  
Assets Held Under Finance Leases          
Disaggregation of Revenue [Line Items]          
Property, plant and equipment $ 251,400   $ 251,400    
[1] Disaggregated revenue for the three months ended June 30, 2019 may not be comparable to disaggregated revenue for the three months ended June 30, 2018 as a result of our adoption of ASC 842, under which we applied the predominance principle and opted to not separate lease and non-lease components.
[2] Net of $1.8 million of amortization expense for the three months ended June 30, 2019, related to a customer contract intangible asset recorded in the wholesale marketing and terminalling segment.
[3] Net of $1.8 million of amortization expense for the three months ended June 30, 2018, related to a customer contract intangible asset recorded in the wholesale marketing and terminalling segment.

[4] Net of $3.6 million of amortization expense for the six months ended June 30, 2019, respectively, related to a customer contract intangible asset recorded in the wholesale marketing and terminalling segment.
[5] Disaggregated revenue for the six months ended June 30, 2019 may not be comparable to disaggregated revenue for the six months ended June 30, 2018 as a result of our adoption of ASC 842, under which we applied the predominance principle and opted to not separate lease and non-lease components.
[6] Net of $2.4 million of amortization expense for the six months ended June 30, 2018, related to a customer contract intangible asset recorded in the wholesale marketing and terminalling segment.