Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2016

Long-term Purchase Commitment [Line Items]

Summary Of Purchase And Sale Commitments

We account for derivatives at fair value with the exception of commitments which have been designated as normal purchases and sales for which we do not record assets or liabilities related to these agreements until the product is purchased or sold. At June 30, 2016, such commitments included the following (in thousands):

	Volume (Barrels)	Value
Fixed price purchases	3,528	$	167,030
Fixed price sales	4,563	$	218,212
Floating price purchases	12,701	$	601,820
Floating price sales	17,773	$	786,992

Long-term Purchase Commitment [Table Text Block]

The approximate amount of future obligation is as follows (in thousands):

For year ending:
December 31, 2016	$	5,951
December 31, 2017	11,938
December 31, 2018	10,060
December 31, 2019	9,121
December 31, 2020	8,451
Thereafter	15,940
Total expected future payments	$	61,461