XML 16 R46.htm IDEA: XBRL DOCUMENT v3.2.0.727
Segment Reporting - Reconciliation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Segment Reporting Information [Line Items]        
Income before income tax expense $ 5,084 $ 333 $ 18,573 $ 6,873
Interest and other income (187) (1) (322) (71)
Interest expense 207 222 588 535
Operating Income 5,104 554 18,839 7,337
Depreciation and amortization 5,231 3,252 9,508 6,211
General and Administrative Expense - Affiliates 12,978 9,747 27,683 17,860
Optimization Revenues - Affiliates (67) 197 1,862 1,821
Net, Cash settlements on non-trading derivative instruments     8,547 (10,256)
Retail Gross Margin 23,093 17,891 50,967 35,575
Not Designated as Hedging Instrument        
Segment Reporting Information [Line Items]        
Net, Gains (losses) on non-trading derivative instruments (4,041) (4,438) (5,241) 7,010
Net, Cash settlements on non-trading derivative instruments $ 4,328 $ (97) $ 8,442 $ (12,998)