Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating Activities
Net loss	$ (70,336)	$ (62,872)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation, depletion, accretion and amortization	169,283	182,723
Net gain on sale of property, plant & equipment and businesses	(31,014)	(15,657)
Contributions to pension plans	(2,248)	(1,995)
Share-based compensation	3,601	8,849
Deferred tax provision	(51,613)	(92,031)
Cost of debt purchase	0	19,153
Changes in assets and liabilities before initial effects of business acquisitions and dispositions	(20,033)	(37,591)
Other, net	(701)	6,437
Net cash provided by (used for) operating activities	(3,061)	7,016
Investing Activities
Purchases of property, plant & equipment	(33,584)	(51,512)
Proceeds from sale of property, plant & equipment	26,069	6,717
Proceeds from sale of businesses, net of transaction costs	11,827	12,284
Other, net	49	1,364
Net cash provided by (used for) investing activities	4,361	(31,147)
Financing Activities
Net short-term payments	0	(185,500)
Payment of current maturities and long-term debt	(105)	(737,739)
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 issuance of common stock	0	4,936
Dividends paid	(2,590)	(64,570)
Proceeds from exercise of stock options	3,524	3,232
Other, net	333	32
Net cash provided by financing activities	1,162	83,334
Net increase in cash and cash equivalents	2,462	59,203
Cash and cash equivalents at beginning of year	155,839	47,541
Cash and cash equivalents at end of period	$ 158,301	$ 106,744