Segment Reporting - Risk (Details) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2016
USD ($)
customer
|
Dec. 31, 2015
USD ($)
customer
|
Dec. 31, 2014
USD ($)
customer
|
|
| Segment Reporting | |||||||||||
| Number of Major Customers | customer | 0 | 0 | 1 | ||||||||
| Total revenues | $ 2,312,430 | $ 2,030,198 | $ 2,146,199 | $ 1,750,812 | $ 2,169,445 | $ 2,486,203 | $ 2,680,088 | $ 2,979,116 | $ 8,239,639 | $ 10,314,852 | $ 17,269,954 |
| Wholesale Segment | |||||||||||
| Segment Reporting | |||||||||||
| Total revenues | $ 4,107,021 | $ 5,911,285 | 12,896,129 | ||||||||
| Wholesale Segment | Sales Revenue | Customer | ExxonMobil | |||||||||||
| Segment Reporting | |||||||||||
| Total revenues | $ 2,900,000 | ||||||||||
| Percentage of revenues | 17.00% | ||||||||||