CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net sales	$ 867,713	$ 831,711	$ 1,727,642	$ 1,619,648
Operating costs and expenses:
Cost of sales	780,941	748,725	1,537,336	1,460,953
Selling, general and administrative expenses	51,727	48,183	99,456	86,669
Gain on sale of assets		(1,150)	(17,386)	(1,150)
Transaction related costs, restructuring and other, net	6,645	443	11,581	1,025
Total operating costs and expenses	839,313	796,201	1,630,987	1,547,497
Operating income	28,400	35,510	96,655	72,151
Interest expense, net	(14,543)	(16,919)	(28,936)	(33,389)
Loss on early redemption of debt		(1,100)		(1,100)
Foreign exchange loss	(255)	(340)	(402)	(940)
Income before income taxes	13,602	17,151	67,317	36,722
(Benefit) provision for income taxes	(17)	2,563	18,384	10,007
Net income	$ 13,619	$ 14,588	$ 48,933	$ 26,715
Earnings per share:
Basic (in dollars per share)	$ 0.39	$ 0.42	$ 1.41	$ 0.77
Diluted (in dollars per share)	$ 0.39	$ 0.42	$ 1.40	$ 0.77
Dividends declared per share of common stock (in dollars per share)	$ 0.08		$ 0.08
Weighted average common shares:
Basic (in shares)	34,451	33,976	34,346	33,971
Diluted (in shares)	34,638	34,002	34,521	33,992