Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	$ (21,366)	$ 48,227
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(30,156)	(60,823)
Proceeds from disposal plant, equipment and timberlands, net	2,360	92
Repayments from intercompany loans		0
Advances of intercompany loans	0	0
Intercompany capital contributed		0
Acquisitions, net of cash acquired	0	(210,911)
Other	(100)	(225)
Net cash used by investing activities	(27,896)	(271,867)
Financing activities
Net (repayments of) proceeds from indebtedness	(25,425)	182,230
Payments of note offering costs	0	(419)
Payment of dividends to shareholders	(9,164)	(8,245)
Repayments of intercompany loans		0
Repurchases of common stock	(9,158)
Borrowings of intercompany loans	0	0
Intercompany capital received		0
Payments related to share-based compensation awards and other	(1,816)	(2,332)
Net cash (used) provided by financing activities	(45,563)	171,234
Effect of exchange rate on cash	(41)	(518)
Net decrease in cash and cash equivalents	(94,866)	(52,924)
Cash and cash equivalents at the beginning of period	122,882	97,679
Cash and cash equivalents at the end of period	28,016	44,755
Adjustments/ Eliminations [Member]
Investing activities
Repayments from intercompany loans		(28,750)
Advances of intercompany loans	3,450	36,057
Intercompany capital contributed		91
Net cash used by investing activities	3,450	7,398
Financing activities
Repayments of intercompany loans		28,750
Borrowings of intercompany loans	(3,450)	(36,057)
Intercompany capital received		(91)
Net cash (used) provided by financing activities	(3,450)	(7,398)
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(15,054)	13,825
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(15,963)	(20,618)
Proceeds from disposal plant, equipment and timberlands, net	1,000	89
Advances of intercompany loans		(1,000)
Other	(100)	(225)
Net cash used by investing activities	(15,063)	(21,754)
Financing activities
Payments of note offering costs		(160)
Payment of dividends to shareholders	(9,164)	(8,245)
Repayments of intercompany loans		(14,750)
Repurchases of common stock	(9,158)
Borrowings of intercompany loans	3,450	330
Payments related to share-based compensation awards and other	(1,816)	(2,332)
Net cash (used) provided by financing activities	(16,688)	(25,157)
Net decrease in cash and cash equivalents	(46,805)	(33,086)
Cash and cash equivalents at the beginning of period	56,216	43,781
Cash and cash equivalents at the end of period	9,411	10,695
Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	1,773	2,187
Investing activities
Proceeds from disposal plant, equipment and timberlands, net	1,355
Repayments from intercompany loans		28,750
Advances of intercompany loans	(3,450)	(35,057)
Intercompany capital contributed		(91)
Net cash used by investing activities	(2,095)	(6,398)
Financing activities
Net decrease in cash and cash equivalents	(322)	(4,211)
Cash and cash equivalents at the beginning of period	501	4,278
Cash and cash equivalents at the end of period	179	67
Non Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	(8,085)	32,215
Investing activities
Expenditures for purchases of plant, equipment and timberlands	(14,193)	(40,205)
Proceeds from disposal plant, equipment and timberlands, net	5	3
Acquisitions, net of cash acquired		(210,911)
Net cash used by investing activities	(14,188)	(251,113)
Financing activities
Net (repayments of) proceeds from indebtedness	(25,425)	182,230
Payments of note offering costs		(259)
Repayments of intercompany loans		(14,000)
Borrowings of intercompany loans		35,727
Intercompany capital received		91
Net cash (used) provided by financing activities	(25,425)	203,789
Effect of exchange rate on cash	(41)	(518)
Net decrease in cash and cash equivalents	(47,739)	(15,627)
Cash and cash equivalents at the beginning of period	66,165	49,620
Cash and cash equivalents at the end of period	$ 18,426	$ 33,993