Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Summary Of Purchase And Sale Commitments

included the following (in thousands):

	Volume (Barrels)	Value
Fixed price purchases	77	$	6,922
Fixed price sales	88	$	8,440
Floating price purchases	25,422	$	2,397,146
Floating price sales	25,483	$	2,411,393

Certain of the commitme