Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net income	$ 37,734	$ 30,277
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	49,725	47,423
Amortization of debt issue costs	864	893
Pension expense, net of unfunded benefits paid	2,908	5,541
Charge for impairment of intangible asset		1,200
Deferred income tax benefit	(4,266)	(2,043)
Losses (gains) on dispositions of plant, equipment and timberlands, net	31	(2,888)
Share-based compensation	4,218	5,502
Change in operating assets and liabilities
Accounts receivable	(12,927)	(21,572)
Inventories	(17,897)	(5,714)
Prepaid and other current assets	(4,205)	420
Accounts payable	(9,662)	5,561
Accruals and other current liabilities	10,257	5,180
Other	2,657	743
Net cash provided by operating activities	59,437	70,523
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(116,948)	(74,280)
Proceeds from disposals of plant, equipment and timberlands, net	55	3,181
Acquisition, net of cash acquired		(224)
Other	(400)	(1,600)
Net cash used by investing activities	(117,293)	(72,923)
Financing activities
Net repayments of revolving credit facility	(642)
Payments of borrowing costs	(136)	(1,329)
Proceeds from term loans	19,428
Repayment of term loans	(3,803)	(3,387)
Payments of dividends	(16,134)	(15,215)
Proceeds from government grants	5,251
Payments related to share-based compensation awards and other	(990)	(2,015)
Net cash provided (used) by financing activities	2,974	(21,946)
Effect of exchange rate changes on cash	330	(1,826)
Net decrease in cash and cash equivalents	(54,552)	(26,172)
Cash and cash equivalents at the beginning of period	105,304	99,837
Cash and cash equivalents at the end of period	50,752	73,665
Cash paid for:
Interest, net of amounts capitalized	7,376	8,943
Income taxes, net	$ 11,609	$ 14,566