CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Current Assets:
Cash and cash equivalents	$ 41,393	$ 26,022	$ 26,099
Accounts receivable, net	275,416	203,748	269,390
Inventories, net	331,984	322,607	336,365
Current deferred income tax benefits	75,000	80,674	91,041
Costs in excess of billings	10,226	1,437	1,319
Other current assets	26,312	23,362	21,354
Total Current Assets	760,331	657,850	745,568
Property, plant and equipment	3,739,475	3,688,692	3,644,580
Allowances for depreciation, depletion and amortization	(1,985,697)	(1,914,401)	(1,946,802)
Net property, plant and equipment	1,753,778	1,774,291	1,697,778
Goodwill	618,874	616,671	638,759
Other intangibles, net	52,213	54,133	18,622
Other noncurrent assets	41,337	44,877	48,192
Total Assets	3,226,533	3,147,822	3,148,919
Current Liabilities:
Bank overdraft	3,352
Accounts payable	113,308	92,210	85,415
Accrued salaries, benefits and payroll taxes	15,586	16,732	12,618
Pension and postretirement benefits	5,746	5,250	4,194
Accrued insurance and other taxes	29,616	26,408	28,514
Current maturities of long-term debt and short-term facilities	7,171	7,182	106,959
Other current liabilities	24,287	25,930	25,198
Total Current Liabilities	199,066	173,712	262,898
Long-term debt	1,137,076	1,052,902	978,956
Pension, postretirement and postemployment benefits	153,240	158,101	121,150
Noncurrent deferred income taxes	229,972	222,064	248,330
Other noncurrent liabilities	90,375	92,179	86,986
Total Liabilities	1,809,729	1,698,958	1,698,320
Equity:
Common stock, par value $0.01 per share	457	456	456
Preferred stock, par value $0.01 per share
Additional paid-in capital	404,074	401,864	397,575
Accumulated other comprehensive loss	(80,640)	(83,890)	(49,319)
Retained earnings	1,054,048	1,090,891	1,063,732
Total Shareholders' Equity	1,377,939	1,409,321	1,412,444
Noncontrolling interests	38,865	39,543	38,155
Total Equity	1,416,804	1,448,864	1,450,599
Total Liabilities and Equity	$ 3,226,533	$ 3,147,822	$ 3,148,919