Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 28,016	$ 122,882	$ 44,755	$ 97,679
Other current assets	513,729	463,700
Plant, equipment and timberlands, net	719,819	723,340
Other assets	368,543	368,488
Total assets	1,630,107	1,678,410
Liabilities and Shareholders' Equity
Current liabilities	263,807	288,367
Long-term debt	413,617	442,325
Deferred income taxes	140,005	141,020
Other long-term liabilities	120,095	122,222
Total liabilities	937,524	993,934
Shareholders' equity	692,583	684,476
Total liabilities and shareholders' equity	1,630,107	1,678,410
Adjustments/ Eliminations [Member]
Assets
Other current assets	(366,211)	(326,045)
Other assets	(1,097,027)	(1,055,972)
Total assets	(1,463,238)	(1,382,017)
Liabilities and Shareholders' Equity
Current liabilities	(374,307)	(337,878)
Long-term debt	(318,069)	(320,795)
Deferred income taxes	(9,465)	(8,319)
Other long-term liabilities	3,003	3,409
Total liabilities	(698,838)	(663,583)
Shareholders' equity	(764,400)	(718,434)
Total liabilities and shareholders' equity	(1,463,238)	(1,382,017)
Parent Company [Member]
Assets
Cash and cash equivalents	9,411	56,216	10,695	43,781
Other current assets	225,862	208,814
Plant, equipment and timberlands, net	249,508	247,243
Other assets	1,021,078	973,748
Total assets	1,505,859	1,486,021
Liabilities and Shareholders' Equity
Current liabilities	385,613	375,535
Long-term debt	250,000	250,000
Deferred income taxes	73,380	70,989
Other long-term liabilities	104,283	105,021
Total liabilities	813,276	801,545
Shareholders' equity	692,583	684,476
Total liabilities and shareholders' equity	1,505,859	1,486,021
Guarantors [Member]
Assets
Cash and cash equivalents	179	501	67	4,278
Other current assets	335,537	327,152
Plant, equipment and timberlands, net	997	1,054
Other assets	234,602	236,411
Total assets	571,315	565,118
Liabilities and Shareholders' Equity
Current liabilities	5,435	2,855
Deferred income taxes	207	(283)
Total liabilities	5,642	2,572
Shareholders' equity	565,673	562,546
Total liabilities and shareholders' equity	571,315	565,118
Non Guarantors [Member]
Assets
Cash and cash equivalents	18,426	66,165	33,993	49,620
Other current assets	318,541	253,779
Plant, equipment and timberlands, net	469,314	475,043
Other assets	209,890	214,301
Total assets	1,016,171	1,009,288
Liabilities and Shareholders' Equity
Current liabilities	247,066	247,855
Long-term debt	481,686	513,120
Deferred income taxes	75,883	78,633
Other long-term liabilities	12,809	13,792
Total liabilities	817,444	853,400
Shareholders' equity	198,727	155,888
Total liabilities and shareholders' equity	$ 1,016,171	$ 1,009,288