Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows from Operating Activities:
Consolidated net earnings	$ 90,305	$ 84,276
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	154,079	130,097
Stock-based compensation expense	6,381	5,408
Gains on divestitures and sales of assets	(47,815)	(1,003)
Deferred income taxes	44,970	19,194
Excess tax benefits from stock-based compensation transactions	(2,354)	(1,990)
Other items, net	1,766	(739)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(120,139)	(108,134)
Inventories, net	1,283	(14,771)
Accounts payable	26,515	27,729
Other assets and liabilities, net	46,637	25,578
Net Cash Provided by Operating Activities	201,628	165,645
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(138,570)	(102,342)
Acquisitions, net	(174)	(64,432)
Cash received in acquisition	59,887
Proceeds from divestitures and sales of assets	113,158	3,208
Repayments from (Loan to) affiliate	850	(3,402)
Payment of railcar construction advances	(14,513)
Reimbursement of railcar construction advances	14,513
Net Cash Provided by (Used for) Investing Activities	35,151	(166,968)
Cash Flows from Financing Activities:
Borrowings of long-term debt	868,762	355,500
Repayments of long-term debt	(1,024,052)	(290,192)
Payments on capital lease obligations	(2,177)
Debt issuance costs	(2,402)	(510)
Change in bank overdraft	(2,556)	10,437
Dividends paid	(64,263)	(55,626)
Purchase of remaining interest in existing subsidiaries	(19,480)
Issuances of common stock	38,195	11,571
Excess tax benefits from stock-based compensation transactions	2,354	1,990
Net Cash (Used for) Provided by Financing Activities	(205,619)	33,170
Net Increase in Cash and Cash Equivalents	31,160	31,847
Cash and Cash Equivalents, beginning of period	42,437	25,394
Cash and Cash Equivalents, end of period	73,597	57,241
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	56,162	28,621
Cash paid for income taxes	$ 6,011	$ 1,432