Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	$ 70,523	$ 21,380
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(74,280)	(47,036)
Proceeds from disposal plant, equipment and timberlands, net	3,181	4,051
Acquisitions, net of cash acquired	(224)
Other	(1,600)	(600)
Net cash used by investing activities	(72,923)	(43,585)
Financing activities
Net proceeds from (repayments of) indebtedness	(3,387)	(18,128)
Payments of borrowing costs	(1,329)
Payment of dividends to shareholders	(15,215)	(13,935)
Repurchases of common stock		(12,180)
Payments related to share-based compensation awards and other	(2,015)	(1,764)
Net cash used by financing activities	(21,946)	(46,007)
Effect of exchange rate on cash	(1,826)	(1,015)
Net (decrease) increase in cash	(26,172)	(69,227)
Cash and cash equivalents at the beginning of period	99,837	122,882
Cash and cash equivalents at the end of period	73,665	53,655
Adjustments/ Eliminations [Member]
Investing activities
Repayments from intercompany loans	(55,320)	(10,409)
Advances of intercompany loans	44,590	15,540
Intercompany capital (contributed) returned	(10,200)
Net cash used by investing activities	(20,930)	5,131
Financing activities
Repayments of intercompany loans	55,320	10,409
Borrowings of intercompany loans	(44,590)	(15,540)
Intercompany capital received (returned)	10,200
Net cash used by financing activities	20,930	(5,131)
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	9,927	712
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(52,331)	(26,368)
Proceeds from disposal plant, equipment and timberlands, net	1,584	2,687
Repayments from intercompany loans	1,465
Intercompany capital (contributed) returned	10,500
Other	(1,600)	(600)
Net cash used by investing activities	(40,382)	(24,281)
Financing activities
Payments of borrowing costs	(1,329)
Payment of dividends to shareholders	(15,215)	(13,935)
Repayments of intercompany loans	(9,158)
Repurchases of common stock		(12,180)
Borrowings of intercompany loans	44,590	15,540
Payments related to share-based compensation awards and other	(2,015)	(1,764)
Net cash used by financing activities	16,873	(12,339)
Net (decrease) increase in cash	(13,582)	(35,908)
Cash and cash equivalents at the beginning of period	42,208	56,216
Cash and cash equivalents at the end of period	28,626	20,308
Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	152	3,371
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(42)
Proceeds from disposal plant, equipment and timberlands, net	1,213	1,355
Repayments from intercompany loans	53,855	10,409
Advances of intercompany loans	(44,590)	(15,540)
Intercompany capital (contributed) returned	(300)
Net cash used by investing activities	10,136	(3,776)
Financing activities
Intercompany capital received (returned)	(10,500)
Net cash used by financing activities	(10,500)
Net (decrease) increase in cash	(212)	(405)
Cash and cash equivalents at the beginning of period	509	495
Cash and cash equivalents at the end of period	297	90
Non Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	60,444	17,297
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(21,907)	(20,668)
Proceeds from disposal plant, equipment and timberlands, net	384	9
Acquisitions, net of cash acquired	(224)
Net cash used by investing activities	(21,747)	(20,659)
Financing activities
Net proceeds from (repayments of) indebtedness	(3,387)	(18,128)
Repayments of intercompany loans	(46,162)	(10,409)
Intercompany capital received (returned)	300
Net cash used by financing activities	(49,249)	(28,537)
Effect of exchange rate on cash	(1,826)	(1,015)
Net (decrease) increase in cash	(12,378)	(32,914)
Cash and cash equivalents at the beginning of period	57,120	66,171
Cash and cash equivalents at the end of period	$ 44,742	$ 33,257