Condensed Consolidated Statements of Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	$ 5,301,709	$ 4,678,293	$ 10,048,152	$ 9,476,141
Cost and expenses:
Cost of sales, excluding depreciation	4,943,238	4,295,979	9,090,922	8,731,081
Operating expenses, excluding depreciation	209,781	202,583	478,680	408,599
General and administrative expenses	32,095	19,141	68,719	49,235
Gain on sale of assets	6	0	(180)	0
Depreciation and amortization expense	34,516	27,563	67,731	54,093
Total cost and expenses	5,219,636	4,545,266	9,705,872	9,243,008
Income from operations	82,073	133,027	342,280	233,133
Other income (expenses)
Change in fair value of catalyst leases	(2,338)	6,820	(4,339)	5,481
Interest expense, net	(26,217)	(21,738)	(51,673)	(43,349)
Net income	$ 53,518	$ 118,109	$ 286,268	$ 195,265