Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Current Assets:
Cash and cash equivalents	$ 34,329	$ 42,437	$ 43,712
Accounts receivable, net	343,784	245,421	287,521
Inventories, net	348,168	347,307	348,873
Current deferred income tax benefits	72,413	74,821	79,104
Other current assets	78,007	45,380	47,275
Total Current Assets	876,701	755,366	806,485
Property, plant and equipment	3,970,472	3,976,884	3,843,806
Allowances for depreciation, depletion and amortization	(2,195,098)	(2,177,643)	(2,126,420)
Net property, plant and equipment	1,775,374	1,799,241	1,717,386
Goodwill	616,621	616,621	616,303
Other intangibles, net	46,896	48,591	48,668
Other noncurrent assets	40,451	40,007	42,277
Total Assets	3,356,043	3,259,826	3,231,119
Current Liabilities:
Bank overdraft		2,556
Accounts payable	139,442	103,600	99,960
Accrued salaries, benefits and payroll taxes	17,393	18,114	16,259
Pension and postretirement benefits	2,356	2,026	4,616
Accrued insurance and other taxes	33,014	29,103	30,679
Current maturities of long-term debt and short-term facilities	12,404	12,403	6,169
Accrued interest	7,386	7,349	7,709
Other current liabilities	32,730	35,398	27,141
Total Current Liabilities	244,725	210,549	192,533
Long-term debt	1,072,397	1,018,518	1,087,150
Pension, postretirement and postemployment benefits	82,662	78,489	184,849
Noncurrent deferred income taxes	275,279	279,999	235,505
Other noncurrent liabilities	113,981	97,352	90,415
Total Liabilities	1,789,044	1,684,907	1,790,452
Equity:
Common stock, par value $0.01 per share	463	461	461
Preferred stock, par value $0.01 per share	0	0	0
Additional paid-in capital	456,989	432,792	429,936
Accumulated other comprehensive loss	(42,141)	(44,114)	(106,257)
Retained earnings	1,149,388	1,148,738	1,077,998
Total Shareholders' Equity	1,564,699	1,537,877	1,402,138
Noncontrolling interests	2,300	37,042	38,529
Total Equity	1,566,999	1,574,919	1,440,667
Total Liabilities and Equity	$ 3,356,043	$ 3,259,826	$ 3,231,119