Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales	[1]	$ 1,008,388	$ 1,301,341	$ 1,858,361	$ 2,404,581
Operating costs and expenses:
Cost of sales		871,394	1,069,931	1,606,538	1,964,419
Direct operating expenses		63,182	62,856	131,799	127,061
Selling, general and administrative expenses		51,644	49,193	100,345	94,789
Depreciation and amortization		36,985	31,267	71,847	63,229
Total operating costs and expenses		1,023,205	1,213,247	1,910,529	2,249,498
Gain (loss) on disposition of assets		6	0	(2,082)	572
Operating income (loss)		(14,811)	88,094	(54,250)	155,655
Interest expense		(18,799)	(18,217)	(37,106)	(39,254)
Equity earnings of investees		4,305	1,828	4,683	1,274
Other income, net		146	13	218	59
Income (loss) before income tax expense (benefit)		(29,159)	71,718	(86,455)	117,734
Income tax expense (benefit)		(8,529)	23,856	(29,765)	35,817
Net income (loss)		(20,630)	47,862	(56,690)	81,917
Net income (loss) attributable to non-controlling interest		(260)	11,452	(783)	18,568
Net income (loss) available to stockholders		$ (20,370)	$ 36,410	$ (55,907)	$ 63,349
Earnings (loss) per share, basic		$ (0.29)	$ 0.52	$ (0.80)	$ 0.91
Weighted average shares outstanding, basic (in thousands)		70,493	69,684	70,318	69,584
Earnings (loss) per share, diluted		$ (0.29)	$ 0.50	$ (0.80)	$ 0.87
Weighted average shares outstanding, diluted (in thousands)		70,493	72,501	70,318	72,395
Cash dividends per share		$ 0.15	$ 0.15	$ 0.30	$ 0.25

[1] Includes excise taxes on sales by the retail segment of $19,864 and $19,369 for the three months and $39,389 and $37,425 for the six months ended June 30, 2016 and 2015, respectively.