Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues	$ 151,911	$ 152,891	$ 381,835	$ 387,494
Costs and expenses:
Cost of goods sold	109,806	108,420	287,469	287,473
Selling, general and administrative expenses	13,342	7,837	35,994	28,469
Asset Impairment Charges	0	1,180	0	1,180
Total costs and expenses	123,148	117,437	323,463	317,122
Operating income	28,763	35,454	58,372	70,372
Interest expense, net	(6,280)	(6,632)	(19,043)	(21,123)
Income before income taxes	22,483	28,822	39,329	49,249
Income tax provision	(3,884)	(3,223)	(10,599)	(7,505)
Net income	$ 18,599	$ 25,599	$ 28,730	$ 41,744
Net income per share:
Basic (in dollars per share)	$ 0.46	$ 0.64	$ 0.71	$ 1.04
Diluted (in dollars per share)	$ 0.46	$ 0.63	$ 0.71	$ 1.03
Distributions per share (in dollars per share)	$ 0.31	$ 0.51	$ 0.93	$ 1.53
Weighted-average shares outstanding:
Basic (in shares)	40,356,512	40,187,334	40,316,957	40,147,133
Diluted (in shares)	40,571,068	40,380,302	40,503,158	40,359,877