CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net earnings (loss)	$ 53,995,000	$ (54,836,000)
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation, depletion, accretion and amortization	69,378,000	75,597,000
Net gain on sale of property, plant & equipment and businesses	(236,364,000)	(17,141,000)
Contributions to pension plans	(1,355,000)	(1,132,000)
Share-based compensation	4,319,000	4,933,000
Excess tax benefits from share-based compensation	(2,997,000)	(856,000)
Deferred tax provision	(7,648,000)	(39,918,000)
Cost of debt purchase	72,949,000	0
Changes in assets and liabilities before initial effects of business acquisitions and dispositions	40,127,000	22,349,000
Other, net	2,624,000	(1,863,000)
Net cash used for operating activities	(4,972,000)	(12,867,000)
Investing Activities
Purchases of property, plant & equipment	(46,006,000)	(26,851,000)
Proceeds from sale of property, plant & equipment	17,785,000	1,623,000
Proceeds from sale of businesses, net of transaction costs	720,056,000	18,164,000
Payment for businesses acquired, net of acquired cash	0	(60,212,000)
Increase in restricted cash	(63,024,000)	0
Other, net	0	2,000
Net cash provided by (used for) investing activities	628,811,000	(67,274,000)
Financing Activities
Payment of current maturities, long-term debt & line of credit	(579,676,000)	(10,016,000)
Proceeds from issuance of common stock	22,808,000	0
Dividends paid	(6,531,000)	(1,299,000)
Proceeds from exercise of stock options	11,599,000	3,203,000
Excess tax benefits from share-based compensation	2,997,000	856,000
Other, net	(1,000)	0
Net cash used for financing activities	(548,804,000)	(7,256,000)
Net increase (decrease) in cash and cash equivalents	75,035,000	(87,397,000)
Cash and cash equivalents at beginning of year	193,738,000	275,478,000
Cash and cash equivalents at end of period	$ 268,773,000	$ 188,081,000