CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Current Assets:
Cash and cash equivalents	$ 57,241	$ 25,394	$ 35,421
Accounts receivable, net	331,030	224,050	296,947
Inventories, net	350,438	332,311	335,092
Current deferred income taxes	77,005	77,716	79,758
Other current assets	29,955	40,930	37,889
Total Current Assets	845,669	700,401	785,107
Property, plant and equipment	3,942,138	3,812,587	3,775,320
Allowances for depreciation, depletion and amortization	(2,159,520)	(2,059,346)	(2,024,379)
Net property, plant and equipment	1,782,618	1,753,241	1,750,941
Goodwill	616,634	616,204	615,986
Other intangibles, net	49,035	50,433	51,330
Other noncurrent assets	43,149	40,647	39,840
Total Assets	3,337,105	3,160,926	3,243,204
Current Liabilities:
Bank overdraft	10,437		102
Accounts payable	111,266	83,537	99,628
Accrued salaries, benefits and payroll taxes	20,655	19,461	17,436
Pension and postretirement benefits	1,992	6,851	6,442
Accrued insurance and other taxes	34,444	28,682	34,175
Income taxes	1,720	287	13,291
Current maturities of long-term debt and short-term facilities	6,169	5,676	6,671
Accrued interest	18,158	7,490	18,209
Other current liabilities	21,591	21,351	21,155
Total Current Liabilities	226,432	173,335	217,109
Long-term debt	1,107,192	1,042,183	1,092,117
Pension, postretirement and postemployment benefits	171,695	183,122	135,761
Noncurrent deferred income taxes	243,858	225,592	243,759
Other noncurrent liabilities	89,045	86,395	84,437
Total Liabilities	1,838,222	1,710,627	1,773,183
Equity:
Common stock, par value $0.01 per share	461	459	458
Preferred stock, par value $0.01 per share
Additional paid-in capital	431,122	414,657	408,898
Accumulated other comprehensive loss	(102,710)	(106,169)	(77,480)
Retained earnings	1,131,276	1,101,598	1,098,529
Total Shareholders' Equity	1,460,149	1,410,545	1,430,405
Noncontrolling interests	38,734	39,754	39,616
Total Equity	1,498,883	1,450,299	1,470,021
Total Liabilities and Equity	$ 3,337,105	$ 3,160,926	$ 3,243,204