Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income	$ 17,994	$ 37,734
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	56,343	49,725
Amortization of debt issue costs	868	864
Pension expense, net of unfunded benefits paid	3,707	2,908
Deferred income tax provision (benefit)	4,282	(4,266)
(Gains) losses on dispositions of plant, equipment and timberlands, net	(50)	31
Share-based compensation	4,868	4,218
Change in operating assets and liabilities
Accounts receivable	(23,753)	(12,927)
Inventories	2,906	(17,897)
Prepaid and other current assets	(7,185)	(4,205)
Accounts payable	(4,001)	(9,662)
Accruals and other current liabilities	(3,702)	10,257
Other	519	2,657
Net cash provided by operating activities	52,796	59,437
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(102,172)	(116,948)
Proceeds from disposals of plant, equipment and timberlands, net	217	55
Other	(100)	(400)
Net cash used by investing activities	(102,055)	(117,293)
Financing activities
Repayments of note offerings		(136)
Net borrowings (repayments) under revolving credit facility	96,534	(642)
Proceeds from term loans		19,428
Repayment of term loans	(6,947)	(3,803)
Payments of dividends	(16,805)	(16,134)
Proceeds from government grants		5,251
Payments related to share-based compensation awards and other	(128)	(990)
Net cash provided by financing activities	72,654	2,974
Effect of exchange rate changes on cash	5,448	330
Net increase (decrease) in cash and cash equivalents	28,843	(54,552)
Cash and cash equivalents at the beginning of period	55,444	105,304
Cash and cash equivalents at the end of period	84,287	50,752
Cash paid for:
Interest, net of amounts capitalized	8,719	7,376
Income taxes, net	$ 7,567	$ 11,609