Condensed Consolidated Statements of Comprehensive Income (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statements of Comprehensive Income [Abstract]
Net sales	$ 775,183,000	$ 687,616,000	$ 1,975,814,000	$ 1,836,357,000
Delivery revenues	38,385,000	41,245,000	114,649,000	122,522,000
Total revenues	813,568,000	728,861,000	2,090,463,000	1,958,879,000
Cost of goods sold	616,200,000	560,693,000	1,666,281,000	1,581,537,000
Delivery costs	38,385,000	41,245,000	114,649,000	122,522,000
Cost of revenues	654,585,000	601,938,000	1,780,930,000	1,704,059,000
Gross profit	158,983,000	126,923,000	309,533,000	254,820,000
Selling, administrative and general expenses	65,854,000	65,441,000	195,411,000	192,267,000
Gain on sale of property, plant & equipment and businesses, net	9,350,000	2,009,000	36,869,000	21,687,000
Restructuring charges	0	(3,056,000)	(1,509,000)	(9,018,000)
Exchange offer costs	0	(1,206,000)	0	(43,331,000)
Other operating expense, net	(2,712,000)	(3,363,000)	(12,907,000)	(2,642,000)
Operating earnings	99,767,000	55,866,000	136,575,000	29,249,000
Other nonoperating income, net	2,310,000	1,806,000	4,968,000	4,196,000
Interest expense, net	49,134,000	53,043,000	152,757,000	158,997,000
Earnings (loss) from continuing operations before income taxes	52,943,000	4,629,000	(11,214,000)	(125,552,000)
Provision for (benefit from) income taxes	10,793,000	(10,992,000)	(21,874,000)	(67,138,000)
Earnings (loss) from continuing operations	42,150,000	15,621,000	10,660,000	(58,414,000)
Earnings (loss) on discontinued operations, net of tax	(787,000)	(1,361,000)	4,640,000	2,338,000
Net earnings (loss)	41,363,000	14,260,000	15,300,000	(56,076,000)
Other comprehensive income, net of tax
Reclassification adjustment for cash flow hedges	679,000	975,000	2,368,000	2,868,000
Adjustment for funded status of pension plans	0	0	60,299,000	0
Amortization of pension and postretirement benefit plans actuarial loss and prior service cost	2,111,000	3,084,000	8,974,000	9,252,000
Other comprehensive income	2,790,000	4,059,000	71,641,000	12,120,000
Comprehensive income (loss)	44,153,000	18,319,000	86,941,000	(43,956,000)
Basic earnings (loss) per share
Continuing operations	$ 0.32	$ 0.12	$ 0.08	$ (0.45)
Discontinued operations	$ 0.00	$ (0.01)	$ 0.04	$ 0.02
Net earnings (loss)	$ 0.32	$ 0.11	$ 0.12	$ (0.43)
Diluted earnings (loss) per share
Continuing operations	$ 0.32	$ 0.12	$ 0.08	$ (0.45)
Discontinued operations	$ (0.01)	$ (0.01)	$ 0.04	$ 0.02
Net earnings (loss)	$ 0.31	$ 0.11	$ 0.12	$ (0.43)
Weighted-average common shares outstanding
Basic	130,266	129,753	130,234	129,674
Assuming dilution	131,320	130,215	131,368	129,674
Cash dividends per share of common stock	$ 0.01	$ 0.01	$ 0.03	$ 0.03
Depreciation, depletion, accretion and amortization	$ 78,320,000	$ 84,108,000	$ 230,877,000	$ 253,391,000
Effective tax rate from continuing operations	20.40%		195.10%	53.50%