CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows from Operating Activities:
Consolidated net earnings	$ 134	$ 18,158
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	88,735	86,453
Stock-based compensation expense	4,577	6,351
Gains on divestitures and sales of assets	(839)	(3,390)
Deferred income taxes	6,777	9,236
Other items, net	1,322	1,034
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(71,668)	(87,587)
Inventories, net	(9,378)	(3,068)
Accounts payable	21,045	25,052
Other assets and liabilities, net	(13,036)	4,437
Net Cash Provided by Operating Activities	27,669	56,676
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(66,251)	(58,728)
Acquisitions, net	(87)	(49,885)
Proceeds from divestitures and sales of assets	3,947	5,188
Net Cash Used for Investing Activities	(62,391)	(103,425)
Cash Flows from Financing Activities:
Borrowings of long-term debt	171,000	460,000
Repayments of long-term debt	(87,134)	(404,977)
Debt issuance costs	(300)	(3,328)
Change in bank overdraft	3,352	(2,123)
Dividends paid	(36,861)	(36,813)
Distributions to owners of noncontrolling interests	(800)	(1,000)
Purchase of remaining interest in existing subsidiaries		(10,394)
Issuances of common stock	836	1,160
Net Cash Provided by Financing Activities	50,093	2,525
Net Increase (Decrease) in Cash and Cash Equivalents	15,371	(44,224)
Cash and Cash Equivalents, beginning of period	26,022	70,323
Cash and Cash Equivalents, end of period	41,393	26,099
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	26,537	34,581
Cash refunds for income taxes	$ 4,309	$ 11,543