CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities:
Consolidated net earnings	$ 84,276	$ 63,803
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	130,097	132,985
Stock-based compensation expense	5,408	5,947
Gains on divestitures and sales of assets	(1,003)	(858)
Deferred income taxes	19,194	11,577
Excess tax benefits from stock-based compensation transactions	(1,990)
Other items, net	(739)	2,314
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(108,134)	(93,198)
Inventories, net	(14,771)	(12,486)
Accounts payable	27,729	7,077
Other assets and liabilities, net	25,578	4,883
Net Cash Provided by Operating Activities	165,645	122,044
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(102,342)	(105,941)
Acquisitions, net	(64,432)	(132)
Proceeds from divestitures and sales of assets	3,208	7,871
Loan to affiliate	(3,402)
Net Cash Used for Investing Activities	(166,968)	(98,202)
Cash Flows from Financing Activities:
Borrowings of long-term debt	355,500	181,000
Repayments of long-term debt	(290,192)	(142,651)
Debt issuance costs	(510)	(300)
Change in bank overdraft	10,437	102
Dividends paid	(55,626)	(55,302)
Distributions to owners of noncontrolling interests		(800)
Issuances of common stock	11,571	3,508
Excess tax benefits from stock-based compensation transactions	1,990
Net Cash Provided by (Used for) Financing Activities	33,170	(14,443)
Net Increase in Cash and Cash Equivalents	31,847	9,399
Cash and Cash Equivalents, beginning of period	25,394	26,022
Cash and Cash Equivalents, end of period	57,241	35,421
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	28,621	29,255
Cash refunds for income taxes	$ 1,432	$ 3,170