Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating activities
Net income	$ 52,409	$ 32,953
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	51,123	51,779
Amortization of debt issue costs and original issue discount	913	2,001
Pension expense, net of unfunded benefits paid	7,711	7,671
Deferred income tax provision (benefit)	(10,872)	13,111
Gains on dispositions of plant, equipment and timberlands, net	(8,471)	(3,902)
Share-based compensation	5,004	4,301
Change in operating assets and liabilities
Accounts receivable	(25,963)	(16,292)
Inventories	(14,160)	(7,136)
Prepaid and other current assets	(4,389)	(9,654)
Accounts payable	3,029	4,932
Environmental matters	(92)
Accruals and other current liabilities	14,510	(7,630)
Cellulosic biofuel and alternative fuel mixture credits	(9,387)	17,833
Other	(12,900)	(8,831)
Net cash provided by operating activities	48,465	81,136
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(45,027)	(44,642)
Proceeds from disposals of plant, equipment and timberlands, net	8,875	4,442
Other	(150)
Net cash used by investing activities	(36,302)	(40,200)
Financing activities
Net repayments of revolving credit facility	(8,000)
Payments of note offerings costs	(102)
Net repayments of other short term debt		(798)
Repurchases of common stock	(4,060)	(26,251)
Payments of dividends	(11,696)	(12,578)
Proceeds from stock options exercised and other	1,461	132
Net cash provided by financing activities	(22,397)	(39,495)
Effect of exchange rate changes on cash	279	1,022
Net (decrease) increase in cash and cash equivalents	(9,955)	2,463
Cash and cash equivalents at the beginning of period	38,277	95,788
Cash and cash equivalents at the end of period	28,322	98,251
Cash paid (received) for:
Interest, net of amounts capitalized	7,873	11,818
Income taxes	$ 26,097	$ (9,447)