Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities
Net loss	$ (56,076)	$ (42,913)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation, depletion, accretion and amortization	253,391	273,671
Net gain on sale of property, plant & equipment and businesses	(31,886)	(55,886)
Contributions to pension plans	(3,379)	(3,762)
Share-based compensation	9,362	12,991
Deferred tax provision	(66,194)	(58,569)
Cost of debt purchase	0	19,153
Changes in assets and liabilities before initial effects of business acquisitions and dispositions	(9,886)	(31,858)
Other, net	(1,573)	8,899
Net cash provided by operating activities	93,759	121,726
Investing Activities
Purchases of property, plant & equipment	(49,418)	(77,332)
Proceeds from sale of property, plant & equipment	28,930	11,730
Proceeds from sale of businesses, net of transaction costs	10,690	72,830
Other, net	963	1,684
Net cash provided by (used for) investing activities	(8,835)	8,912
Financing Activities
Net short-term payments	0	(285,500)
Payment of current maturities and long-term debt	(120)	(737,952)
Cost of debt purchase	0	(19,153)
Proceeds from issuance of long-term debt	0	1,100,000
Debt issuance costs	0	(17,904)
Proceeds from settlement of interest rate swap agreements	0	23,387
Proceeds from issuance of common stock	0	4,936
Dividends paid	(3,885)	(96,878)
Proceeds from exercise of stock options	6,167	3,232
Other, net	201	32
Net cash provided by (used for) financing activities	2,363	(25,800)
Net increase in cash and cash equivalents	87,287	104,838
Cash and cash equivalents at beginning of year	155,839	47,541
Cash and cash equivalents at end of period	$ 243,126	$ 152,379