Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	$ 7,561	$ 11,441
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(36,783)	(43,294)
Proceeds from disposals of plant, equipment and timberlands, net		33
Other		(300)
Net cash used by investing activities	(36,783)	(43,561)
Financing activities
Net long-term borrowings	36,046	(1,926)
Payments of borrowing costs		(51)
Payments of dividends	(5,455)	(5,231)
Proceeds from government grants		3,861
Payments related to share-based compensation awards and other	(112)	(751)
Net cash provided (used) by financing activities	30,479	(4,098)
Effect of exchange rate on cash	526	1,176
Net increase (decrease) in cash and cash equivalents	1,783	(35,042)
Cash and cash equivalents at the beginning of period	55,444	105,304
Cash and cash equivalents at the end of period	57,227	70,262
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(19,330)	10,563
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(21,515)	(22,297)
Proceeds from disposals of plant, equipment and timberlands, net		21
Intercompany capital (contributed) returned		(17,000)
Other		(300)
Net cash used by investing activities	(21,515)	(39,576)
Financing activities
Net long-term borrowings	38,000
Payments of borrowing costs		(51)
Payments of dividends	(5,455)	(5,231)
Borrowings of intercompany loans	8,550	3,210
Proceeds from government grants		1,861
Payments related to share-based compensation awards and other	(112)	(751)
Net cash provided (used) by financing activities	40,983	(962)
Net increase (decrease) in cash and cash equivalents	138	(29,975)
Cash and cash equivalents at the beginning of period	5,082	59,130
Cash and cash equivalents at the end of period	5,220	29,155
Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(307)	(74)
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(9,551)	(13,686)
Repayments from intercompany loans	8,000	4,000
Advances of intercompany loans	(8,550)	(3,210)
Intercompany capital (contributed) returned	(400)	(500)
Net cash used by investing activities	(10,501)	(13,396)
Financing activities
Net long-term borrowings	12,000
Intercompany capital (returned) received		17,000
Proceeds from government grants		2,000
Net cash provided (used) by financing activities	12,000	19,000
Net increase (decrease) in cash and cash equivalents	1,192	5,530
Cash and cash equivalents at the beginning of period	1,461	465
Cash and cash equivalents at the end of period	2,653	5,995
Non Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	27,839	952
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(5,717)	(7,311)
Proceeds from disposals of plant, equipment and timberlands, net		12
Net cash used by investing activities	(5,717)	(7,299)
Financing activities
Net long-term borrowings	(13,954)	(1,926)
Repayments of intercompany loans	(8,000)	(4,000)
Intercompany capital (returned) received	400	500
Payment of intercompany dividend	(641)
Net cash provided (used) by financing activities	(22,195)	(5,426)
Effect of exchange rate on cash	526	1,176
Net increase (decrease) in cash and cash equivalents	453	(10,597)
Cash and cash equivalents at the beginning of period	48,901	45,709
Cash and cash equivalents at the end of period	49,354	35,112
Adjustments/ Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(641)
Investing activities
Repayments from intercompany loans	(8,000)	(4,000)
Advances of intercompany loans	8,550	3,210
Intercompany capital (contributed) returned	400	17,500
Net cash used by investing activities	950	16,710
Financing activities
Repayments of intercompany loans	8,000	4,000
Borrowings of intercompany loans	(8,550)	(3,210)
Intercompany capital (returned) received	(400)	(17,500)
Payment of intercompany dividend	641
Net cash provided (used) by financing activities	$ (309)	$ (16,710)