Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 2,397,139	$ 2,038,296	$ 6,794,611	$ 6,099,028
Operating costs and expenses:
Cost of products sold (exclusive of depreciation and amortization)	2,053,409	1,807,411	5,854,320	5,479,813
Direct operating expenses (exclusive of depreciation and amortization)	109,159	116,982	337,571	337,930
Selling, general, and administrative expenses	27,153	23,733	72,357	61,185
Impairment losses		3,963		3,963
Maintenance turnaround expense	632		1,336	23,286
Depreciation and amortization	35,581	35,253	105,301	104,294
Total operating costs and expenses	2,225,934	1,987,342	6,370,885	6,010,471
Operating income	171,205	50,954	423,726	88,557
Other income (expense):
Interest income	114	151	345	317
Interest expense and other financing costs	(33,195)	(37,099)	(101,191)	(111,168)
Amortization of loan fees	(2,295)	(2,453)	(6,869)	(7,287)
Loss on extinguishment of debt			(4,641)
Other, net	(5,206)	414	(4,038)	4,212
Income (loss) before income taxes	130,623	11,967	307,332	(25,369)
Provision for income taxes	(45,695)	(5,108)	(110,108)	15,892
Net income (loss)	$ 84,928	$ 6,859	$ 197,224	$ (9,477)
Net earnings (loss) per share:
Basic	$ 0.94	$ 0.08	$ 2.17	$ (0.11)
Diluted	$ 0.81	$ 0.08	$ 1.90	$ (0.11)
Weighted average common shares outstanding:
Basic	89,176	88,280	88,878	88,170
Diluted	109,935	88,280	109,733	88,170