Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 407,800	$ 432,991	$ 783,938	$ 806,694
Total revenues	484,433	452,417	929,601	839,673
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	390,407	419,365	751,138	779,450
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	17,393	13,626	32,800	27,244
Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	407,800	432,991	783,938	806,694
Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	76,633	19,426	145,663	32,979
Marketing
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	390,407	419,365	751,138	779,450
Total revenues	467,040	438,791	896,801	812,429
Marketing | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	390,407	419,365	751,138	779,450
Marketing | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0	0	0
Marketing | Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	390,407	419,365	751,138	779,450
Marketing | Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	76,633	19,426	145,663	32,979
Transportation
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	17,393	13,626	32,800	27,244
Total revenues	17,393	13,626	32,800	27,244
Transportation | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0	0	0
Transportation | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	17,393	13,626	32,800	27,244
Transportation | Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	17,393	13,626	32,800	27,244
Transportation | Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 0	$ 0	$ 0	$ 0