Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Consolidated net earnings (loss)	$ 6,159	$ (23,153)
Adjustments to reconcile consolidated net earnings (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	67,268	42,466
Stock-based compensation expense	2,907	1,409
Gains on divestitures and sales of assets	(1,576)	(1,106)
Deferred income taxes	27,774	(5,063)
Excess tax benefits from stock-based compensation transactions	(109)	(636)
Other items, net	1,192	1,223
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	40,006	2,834
Inventories, net	(19,071)	(7,411)
Accounts payable	(20,328)	(4,825)
Other assets and liabilities, net	(69,097)	874
Net Cash Provided by Operating Activities	35,125	6,612
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(56,085)	(36,913)
Acquisitions, net	(10,589)	(50)
Proceeds from divestitures and sales of assets	1,475	1,401
Repayments from affiliate	1,808
Net Cash Used for Investing Activities	(63,391)	(35,562)
Cash Flows from Financing Activities:
Borrowings of long-term debt		60,000
Repayments of long-term debt	(4,738)	(23,125)
Payments on capital lease obligations	(795)	(525)
Change in bank overdraft	(183)	(2,556)
Dividends paid	(28,354)	(18,604)
Issuances of common stock	9,942	6,488
Excess tax benefits from stock-based compensation transactions	109	636
Net Cash (Used for) Provided by Financing Activities	(24,019)	22,314
Net Decrease in Cash and Cash Equivalents	(52,285)	(6,636)
Cash and Cash Equivalents, beginning of period	108,651	42,437
Cash and Cash Equivalents, end of period	56,366	35,801
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	11,417	1,633
Cash paid for income taxes	$ 18,678	$ 53