Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net income (loss)	$ (21,541)	$ (177,604)	$ 7,914
(Income) loss from discontinued operations, net of tax benefits	(3,670)	177,156	(13,526)
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	50,820	47,525	42,078
Amortization of debt issue costs and original issue discount	1,672	1,159	1,157
Pension settlement charge	75,326
Deferred income tax benefit (provision)	(22,971)	(7,704)	12,003
Gains on dispositions of plant, equipment and timberlands, net	(2,060)	(3,256)	(197)
Share-based compensation	3,583	6,288	5,494
Change in operating assets and liabilities
Accounts receivable	(5,473)	(621)	(4,148)
Inventories	(17,387)	(32,138)	1,522
Prepaid and other current assets	(2,833)	(3,372)	(910)
Accounts payable	10,337	13,774	20,361
Accruals and other current liabilities	(19,536)	(23,984)	(16,690)
Pension assets received	53,401
Other	3,167	(3,175)	(1,824)
Net cash provided (used) by operating activities	102,835	(5,952)	53,234
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(27,765)	(42,129)	(80,783)
Proceeds from disposals of plant, equipment and timberlands, net	2,198	3,462	218
Acquisition, net of cash acquired	(1,383)	(178,905)
Other investing	(163)	(68)	(243)
Net cash used by investing activities	(27,113)	(217,640)	(80,808)
Financing activities
Repayments of note offerings	(250,000)
Net borrowings (repayments) under revolving credit facility	(28,062)	(55,446)	109,436
Payments of borrowing costs	(2,204)
Proceeds from term loans	248,644
Repayment of term loans	(16,660)	(11,069)	(9,771)
Payments of dividends	(22,936)	(22,760)	(22,480)
Payments related to share-based compensation awards and other	(1,556)	(2,151)	(472)
Net cash provided (used) by financing activities	(72,774)	(91,426)	76,713
Effect of exchange rate changes on cash	(269)	(5,564)	7,244
Net increase (decrease) in cash and cash equivalents	2,679	(320,582)	56,383
Change in cash and cash equivalents from discontinued operations	(19,163)	347,048	4,392
Cash and cash equivalents at the beginning of period	142,685	116,219	55,444
Cash and cash equivalents at the end of period	126,201	142,685	116,219
Cash paid for:
Interest, net of amounts capitalized	10,208	15,760	13,934
Income taxes, net	$ 14,242	$ 15,171	$ 9,336