Guarantor Financial Statements (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 28,322	$ 38,277	$ 98,251	$ 95,788
Other current assets	435,556	384,136
Plant, equipment and timberlands, net	606,644	601,950
Other assets	113,513	112,562
Total assets	1,184,035	1,136,925
Liabilities and Shareholders' Equity
Current liabilities	228,396	211,240
Long-term debt	219,000	227,000
Deferred income taxes	65,991	69,791
Other long-term liabilities	124,731	138,490
Total liabilities	638,118	646,521
Shareholders' equity	545,917	490,404
Total liabilities and shareholders' equity	1,184,035	1,136,925
Parent Company [Member]
Assets
Cash and cash equivalents	3,155	3,007	69,836	61,953
Other current assets	281,788	203,173
Plant, equipment and timberlands, net	236,084	243,554
Other assets	785,241	736,733
Total assets	1,306,268	1,186,467
Liabilities and Shareholders' Equity
Current liabilities	400,569	310,814
Long-term debt	219,000	227,000
Deferred income taxes	37,350	42,252
Other long-term liabilities	103,432	115,997
Total liabilities	760,351	696,063
Shareholders' equity	545,917	490,404
Total liabilities and shareholders' equity	1,306,268	1,186,467
Guarantors [Member]
Assets
Cash and cash equivalents	5,647	2,894	890	91
Other current assets	441,642	378,519
Plant, equipment and timberlands, net	6,243	6,648
Other assets	160,327	175,945
Total assets	613,859	564,006
Liabilities and Shareholders' Equity
Current liabilities	68,461	31,328
Deferred income taxes	4,900	4,079
Other long-term liabilities	10,020	10,059
Total liabilities	83,381	45,466
Shareholders' equity	530,478	518,540
Total liabilities and shareholders' equity	613,859	564,006
Non Guarantors [Member]
Assets
Cash and cash equivalents	19,520	32,376	27,525	33,744
Other current assets	244,263	223,494
Plant, equipment and timberlands, net	364,317	351,748
Other assets	47,983	48,610
Total assets	676,083	656,228
Liabilities and Shareholders' Equity
Current liabilities	297,296	293,283
Deferred income taxes	39,463	39,511
Other long-term liabilities	9,128	9,415
Total liabilities	345,887	342,209
Shareholders' equity	330,196	314,019
Total liabilities and shareholders' equity	676,083	656,228
Adjustments/ Eliminations [Member]
Assets
Other current assets	(532,137)	(421,050)
Other assets	(880,038)	(848,726)
Total assets	(1,412,175)	(1,269,776)
Liabilities and Shareholders' Equity
Current liabilities	(537,930)	(424,185)
Deferred income taxes	(15,722)	(16,051)
Other long-term liabilities	2,151	3,019
Total liabilities	(551,501)	(437,217)
Shareholders' equity	(860,674)	(832,559)
Total liabilities and shareholders' equity	$ (1,412,175)	$ (1,269,776)