Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	$ 2,155	$ (10,210)
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(21,749)	(14,435)
Proceeds from disposal plant, equipment and timberlands, net	2,726	839
Other	(1,600)
Net cash used by investing activities	(20,623)	(13,596)
Financing activities
Payments of borrowing costs	(1,008)
Net proceeds from indebtedness		(17,933)
Payment of dividends to shareholders	(4,774)	(4,363)
Repurchases of common stock		(1,251)
Payments related to share-based compensation awards and other	(1,408)	(781)
Net cash used by financing activities	(7,190)	(24,328)
Effect of exchange rate on cash	(2,609)	37
Net increase (decrease) in cash	(28,267)	(48,097)
Cash and cash equivalents at the beginning of period	99,837	122,882
Cash and cash equivalents at the end of period	71,570	74,785
Adjustments/ Eliminations [Member]
Investing activities
Repayments from intercompany loans	(31,556)
Advances of intercompany loans	30,690	1,250
Net cash used by investing activities	(866)	1,250
Financing activities
Repayments of intercompany loans	31,556
Borrowings of intercompany loans	(30,690)	(1,250)
Net cash used by financing activities	866	(1,250)
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(975)	(3,797)
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(14,513)	(6,979)
Proceeds from disposal plant, equipment and timberlands, net	1,513	838
Other	(1,600)
Net cash used by investing activities	(14,600)	(6,141)
Financing activities
Payments of borrowing costs	(1,008)
Payment of dividends to shareholders	(4,774)	(4,363)
Repurchases of common stock		(1,251)
Borrowings of intercompany loans	30,690	1,250
Payments related to share-based compensation awards and other	(1,408)	(781)
Net cash used by financing activities	23,500	(5,145)
Net increase (decrease) in cash	7,925	(15,083)
Cash and cash equivalents at the beginning of period	42,208	56,216
Cash and cash equivalents at the end of period	50,133	41,133
Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(10)	981
Investing activities
Proceeds from disposal plant, equipment and timberlands, net	1,213
Repayments from intercompany loans	31,556
Advances of intercompany loans	(30,690)	(1,250)
Net cash used by investing activities	2,079	(1,250)
Financing activities
Net increase (decrease) in cash	2,069	(269)
Cash and cash equivalents at the beginning of period	514	501
Cash and cash equivalents at the end of period	2,583	232
Non Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	3,140	(7,394)
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(7,236)	(7,456)
Proceeds from disposal plant, equipment and timberlands, net		1
Net cash used by investing activities	(7,236)	(7,455)
Financing activities
Net proceeds from indebtedness		(17,933)
Repayments of intercompany loans	(31,556)
Net cash used by financing activities	(31,556)	(17,933)
Effect of exchange rate on cash	(2,609)	37
Net increase (decrease) in cash	(38,261)	(32,745)
Cash and cash equivalents at the beginning of period	57,115	66,165
Cash and cash equivalents at the end of period	$ 18,854	$ 33,420