Consolidated Statements of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Net sales (1)	$ 838,882	[1]	$ 881,902	[1]	$ 2,421,194	[1]	$ 2,551,763	[1]
Operating costs and expenses:
Cost of sales	701,331		844,423		2,125,775		2,261,948
Direct operating expenses	25,723		26,281		79,816		84,017
Selling, general and administrative expenses	8,353		4,134		19,505		16,864
Depreciation and amortization	13,852		10,975		33,427		34,282
Total operating costs and expenses	749,259		885,813		2,258,523		2,397,111
Loss on disposition of assets	0		(21)		0		(21)
Operating income (loss)	89,623		(3,932)		162,671		154,631
Interest expense	(11,584)		(12,127)		(34,477)		(30,489)
Other income, net	14		0		627		18
Income (loss) before state income tax expense	78,053		(16,059)		128,821		124,160
State income tax expense	1,060		61		1,785		1,434
Net income (loss)	$ 76,993		$ (16,120)		$ 127,036		$ 122,726
Earnings (loss) per unit	$ 1.23		$ (0.26)		$ 2.03		$ 1.96
Weighted average common units outstanding (in thousands)	62,507		62,502		62,505		62,502
Cash distribution per unit	$ 0.13		$ 0.71		$ 1.00		$ 2.76

[1] Includes sales to related parties of $156,131 and $164,338 for the three months and $447,314 and $462,280 for the nine months ended September 30, 2014 and 2013, respectively.