Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	$ 116,110	$ 133,743	$ 99,577
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(160,158)	(99,889)	(66,046)
Proceeds from disposals of plant, equipment and timberlands, net	70	24,459	5,072
Acquisition, net of cash acquired		(224)	(8,015)
Other	(800)	(1,600)	(600)
Net cash used by investing activities	(160,888)	(77,254)	(69,589)
Financing activities
Net long-term borrowings	14,114	(24,650)	(18,128)
Payments of borrowing costs	(136)	(1,329)
Payments of dividends	(21,589)	(20,443)	(18,696)
Repurchases of common stock			(12,180)
Proceeds from government grants	5,582	421
Payments related to share-based compensation awards and other	(990)	(2,015)	(1,877)
Net cash used by financing activities	(3,019)	(48,016)	(50,881)
Effect of exchange rate on cash	(2,063)	(3,006)	(2,152)
Net increase (decrease) in cash and cash equivalents	(49,860)	5,467	(23,045)
Cash and cash equivalents at the beginning of period	105,304	99,837	122,882
Cash and cash equivalents at the end of period	55,444	105,304	99,837
Adjustments/ Eliminations [Member]
Investing activities
Repayments from intercompany loans	(15,601)	(57,855)	(20,840)
Advances of intercompany loans	18,330	49,230	39,011
Intercompany capital contributed	17,500	(9,800)
Net cash used by investing activities	20,229	(18,425)	18,171
Financing activities
Repayments of intercompany loans	15,601	57,855	20,840
Borrowings of intercompany loans	(18,330)	(49,230)	(39,011)
Intercompany capital (returned) received	(17,500)	9,800
Net cash used by financing activities	(20,229)	18,425	(18,171)
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	33,109	34,391	36,240
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(104,595)	(65,265)	(34,518)
Proceeds from disposals of plant, equipment and timberlands, net	41	22,741	3,707
Advances of intercompany loans			(12,671)
Intercompany capital contributed	(17,000)	10,100
Other	(800)	(1,600)	(600)
Net cash used by investing activities	(122,354)	(34,024)	(44,082)
Financing activities
Net long-term borrowings	36,000
Payments of borrowing costs	(136)	(1,329)
Payments of dividends	(21,589)	(20,443)	(18,696)
Repurchases of common stock			(12,180)
Repayments of intercompany loans		(9,158)
Borrowings of intercompany loans	18,330	49,230	26,340
Proceeds from government grants	3,582	421
Payments related to share-based compensation awards and other	(990)	(2,166)	(1,630)
Net cash used by financing activities	35,197	16,555	(6,166)
Net increase (decrease) in cash and cash equivalents	(54,048)	16,922	(14,008)
Cash and cash equivalents at the beginning of period	59,130	42,208	56,216
Cash and cash equivalents at the end of period	5,082	59,130	42,208
Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	1,275	627	4,159
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(30,682)	(109)
Proceeds from disposals of plant, equipment and timberlands, net		1,213	1,355
Repayments from intercompany loans	15,601	57,855	20,840
Advances of intercompany loans	(18,330)	(49,230)	(26,340)
Intercompany capital contributed	(500)	(300)
Net cash used by investing activities	(33,911)	9,429	(4,145)
Financing activities
Net long-term borrowings	14,000
Intercompany capital (returned) received	17,000	(10,100)
Payment of intercompany dividend	632
Proceeds from government grants	2,000
Net cash used by financing activities	33,632	(10,100)
Net increase (decrease) in cash and cash equivalents	996	(44)	14
Cash and cash equivalents at the beginning of period	465	509	495
Cash and cash equivalents at the end of period	1,461	465	509
Non Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	81,726	98,725	59,178
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(24,881)	(34,515)	(31,528)
Proceeds from disposals of plant, equipment and timberlands, net	29	505	10
Acquisition, net of cash acquired		(224)	(8,015)
Net cash used by investing activities	(24,852)	(34,234)	(39,533)
Financing activities
Net long-term borrowings	(35,886)	(24,650)	(18,128)
Repayments of intercompany loans	(15,601)	(48,697)	(20,840)
Borrowings of intercompany loans			12,671
Intercompany capital (returned) received	500	300
Payment of intercompany dividend	(632)
Payments related to share-based compensation awards and other		151	(247)
Net cash used by financing activities	(51,619)	(72,896)	(26,544)
Effect of exchange rate on cash	(2,063)	(3,006)	(2,152)
Net increase (decrease) in cash and cash equivalents	3,192	(11,411)	(9,051)
Cash and cash equivalents at the beginning of period	45,709	57,120	66,171
Cash and cash equivalents at the end of period	$ 48,901	$ 45,709	$ 57,120