Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 55,444	$ 105,304	$ 99,837	$ 122,882
Other current assets	438,815	447,063
Plant, equipment and timberlands, net	775,898	698,864	697,608
Other assets	251,102	249,185
Total assets	1,521,259	1,500,416
Liabilities and Shareholders' Equity
Current liabilities	323,011	304,320
Long-term debt	363,647	353,296
Deferred income taxes	54,995	76,458
Other long-term liabilities	125,780	103,095
Total liabilities	867,433	837,169
Shareholders' equity	653,826	663,247	649,109	684,476
Total liabilities and shareholders’ equity	1,521,259	1,500,416
Adjustments/ Eliminations [Member]
Assets
Other current assets	(265,663)	(230,509)
Investments in subsidiaries	(1,329,594)	(1,244,566)
Total assets	(1,595,257)	(1,475,075)
Liabilities and Shareholders' Equity
Current liabilities	(265,663)	(230,523)
Total liabilities	(265,663)	(230,523)
Shareholders' equity	(1,329,594)	(1,244,552)
Total liabilities and shareholders’ equity	(1,595,257)	(1,475,075)
Parent Company [Member]
Assets
Cash and cash equivalents	5,082	59,130	42,208	56,216
Other current assets	206,002	199,690
Plant, equipment and timberlands, net	360,521	286,334
Investments in subsidiaries	789,565	737,450
Other assets	123,010	106,586
Total assets	1,484,180	1,389,190
Liabilities and Shareholders' Equity
Current liabilities	426,628	363,037
Long-term debt	283,686	247,075
Deferred income taxes	10,221	28,561
Other long-term liabilities	109,819	87,270
Total liabilities	830,354	725,943
Shareholders' equity	653,826	663,247
Total liabilities and shareholders’ equity	1,484,180	1,389,190
Guarantors [Member]
Assets
Cash and cash equivalents	1,461	465	509	495
Other current assets	256,289	238,515
Plant, equipment and timberlands, net	31,455	1,114
Investments in subsidiaries	540,029	507,116
Total assets	829,234	747,210
Liabilities and Shareholders' Equity
Current liabilities	26,085	9,725
Long-term debt	14,000
Deferred income taxes	(729)	(79)
Other long-term liabilities	313
Total liabilities	39,669	9,646
Shareholders' equity	789,565	737,564
Total liabilities and shareholders’ equity	829,234	747,210
Non Guarantors [Member]
Assets
Cash and cash equivalents	48,901	45,709	$ 57,120	$ 66,171
Other current assets	242,187	239,367
Plant, equipment and timberlands, net	383,922	411,416
Other assets	128,092	142,599
Total assets	803,102	839,091
Liabilities and Shareholders' Equity
Current liabilities	135,961	162,081
Long-term debt	65,961	106,221
Deferred income taxes	45,503	47,976
Other long-term liabilities	15,648	15,825
Total liabilities	263,073	332,103
Shareholders' equity	540,029	506,988
Total liabilities and shareholders’ equity	$ 803,102	$ 839,091