Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer [Abstract]
Revenue, performance obligation, description of timing									Payment is typically due in full within 30 days of the invoice date.
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									$ 1,636,773
Total revenues	$ 442,649	$ 467,891	$ 452,417	$ 387,256	$ 408,460	$ 295,311	$ 315,202	$ 303,087	1,750,213	$ 1,322,060	$ 1,099,540
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,580,997
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									55,776
Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,636,773
Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									113,440
Marketing
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,580,997
Total revenues									1,694,437	1,267,275	1,043,775
Marketing | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,580,997
Marketing | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0
Marketing | Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,580,997
Marketing | Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									113,440
Transportation
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									55,776
Total revenues									55,776	$ 53,358	$ 52,355
Transportation | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0
Transportation | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									55,776
Transportation | Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									55,776
Transportation | Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									$ 0