Consolidating Financial Statements Condensed Consolidating Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 266,017	$ 280,596	$ 236,575	$ 78,603
Accounts receivable, less allowance for doubtful accounts	105,693	100,359
Inventory	113,643	127,966
Deferred Tax Assets, Net, Current	66,509	15,845
Prepaid and other current assets	38,896	41,508
Total current assets	590,758	566,274
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,565,782	1,573,309
NET PROPERTY, PLANT AND EQUIPMENT	760,238	707,038
INVESTMENT IN JOINT VENTURE	73,830	72,419
INVESTMENT IN SUBSIDIARIES	0	0
INTERCOMPANY NOTES RECEIVABLE	0	0
OTHER ASSETS	211,677	203,911
TOTAL ASSETS	3,202,285	3,122,951
CURRENT LIABILITIES
Accounts payable	108,493	70,381
Current maturities of long-term debt	50,000	150,000
Accrued taxes	30,059	13,824
Accrued payroll and benefits	18,471	28,068
Accrued interest	11,200	7,956
Accrued customer incentives	8,936	10,849
Other current liabilities	25,168	18,640
Current liabilities for dispositions and discontinued operations	8,398	8,105
Total current liabilities	260,725	307,823
LONG-TERM DEBT	1,150,471	1,120,052
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	71,799	73,590
PENSION AND OTHER POSTRETIREMENT BENEFITS	158,829	159,582
OTHER NON-CURRENT LIABILITIES	21,271	23,900
INTERCOMPANY PAYABLE	0	0
TOTAL SHAREHOLDERS' EQUITY	1,539,190	1,438,004		1,323,073
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,202,285	3,122,951
Parent Company [Member]
CURRENT ASSETS
Cash and cash equivalents	151,978	252,888	131,626	0
Accounts receivable, less allowance for doubtful accounts	27	0
Inventory	0	0
Deferred Tax Assets, Net, Current	0	0
Prepaid and other current assets	0	0
Total current assets	152,005	252,888
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	0	0
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	1,599,115	1,445,205
INTERCOMPANY NOTES RECEIVABLE	215,140	213,863
OTHER ASSETS	4,042	4,148
TOTAL ASSETS	1,970,302	1,916,104
CURRENT LIABILITIES
Accounts payable	0	0
Current maturities of long-term debt	50,000	150,000
Accrued taxes	0	0
Accrued payroll and benefits	0	0
Accrued interest	6,112	3,100
Accrued customer incentives	0	0
Other current liabilities	0	0
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	56,112	153,100
LONG-TERM DEBT	375,000	325,000
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	0	0
OTHER NON-CURRENT LIABILITIES	0	0
INTERCOMPANY PAYABLE	0	0
TOTAL SHAREHOLDERS' EQUITY	1,539,190	1,438,004
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,970,302	1,916,104
Senior Exchangeable Notes due 2015 [Member] [Domain] | Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	20,930	3,966	27,671	8,977
Accounts receivable, less allowance for doubtful accounts	7	386
Inventory	0	0
Deferred Tax Assets, Net, Current	0	0
Prepaid and other current assets	3,618	1,566
Total current assets	24,555	5,918
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	2,315	2,321
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	1,827,667	1,677,782
INTERCOMPANY NOTES RECEIVABLE	0	14,000
OTHER ASSETS	28,086	27,779
TOTAL ASSETS	1,882,623	1,727,800
CURRENT LIABILITIES
Accounts payable	1,463	2,099
Current maturities of long-term debt	0	0
Accrued taxes	14	485
Accrued payroll and benefits	8,578	15,044
Accrued interest	484	379
Accrued customer incentives	0	0
Other current liabilities	3,245	2,925
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	13,784	20,932
LONG-TERM DEBT	0	0
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	129,743	129,156
OTHER NON-CURRENT LIABILITIES	14,007	16,432
INTERCOMPANY PAYABLE	125,974	116,075
TOTAL SHAREHOLDERS' EQUITY	1,599,115	1,445,205
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,882,623	1,727,800
Senior Exchangeable Notes due 2015 [Member] [Domain] | Subsidiary Issuer [Member]
CURRENT ASSETS
Cash and cash equivalents	31,749	19,358	60,750	59,976
Accounts receivable, less allowance for doubtful accounts	478	0
Inventory	0	0
Deferred Tax Assets, Net, Current	0	0
Prepaid and other current assets	629	691
Total current assets	32,856	20,049
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	0	0
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	1,486,647	1,452,027
INTERCOMPANY NOTES RECEIVABLE	20,021	19,831
OTHER ASSETS	4,826	5,182
TOTAL ASSETS	1,544,350	1,497,089
CURRENT LIABILITIES
Accounts payable	222	33
Current maturities of long-term debt	0	0
Accrued taxes	0	0
Accrued payroll and benefits	0	0
Accrued interest	3,695	3,197
Accrued customer incentives	0	0
Other current liabilities	0	0
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	3,917	3,230
LONG-TERM DEBT	698,916	718,321
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	0	0
OTHER NON-CURRENT LIABILITIES	0	0
INTERCOMPANY PAYABLE	0	0
TOTAL SHAREHOLDERS' EQUITY	841,517	775,538
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,544,350	1,497,089
Senior Exchangeable Notes due 2015 [Member] [Domain] | Non-Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents			16,528	9,650
Accounts receivable, less allowance for doubtful accounts	105,181	99,973
Inventory	113,643	127,966
Deferred Tax Assets, Net, Current	66,509	15,845
Prepaid and other current assets	34,649	39,251
Total current assets	381,342	287,419
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,565,782	1,573,309
NET PROPERTY, PLANT AND EQUIPMENT	757,923	704,717
INVESTMENT IN JOINT VENTURE	73,830	72,419
INVESTMENT IN SUBSIDIARIES	0	0
INTERCOMPANY NOTES RECEIVABLE	0	0
OTHER ASSETS	174,723	166,802
TOTAL ASSETS	2,953,600	2,804,666
CURRENT LIABILITIES
Accounts payable	106,808	68,249
Current maturities of long-term debt	0	0
Accrued taxes	30,045	13,339
Accrued payroll and benefits	9,893	13,024
Accrued interest	909	1,280
Accrued customer incentives	8,936	10,849
Other current liabilities	21,923	15,715
Current liabilities for dispositions and discontinued operations	8,398	8,105
Total current liabilities	186,912	130,561
LONG-TERM DEBT	76,555	76,731
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	71,799	73,590
PENSION AND OTHER POSTRETIREMENT BENEFITS	29,086	30,426
OTHER NON-CURRENT LIABILITIES	7,264	7,468
INTERCOMPANY PAYABLE	168,076	137,797
TOTAL SHAREHOLDERS' EQUITY	2,413,908	2,348,093
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,953,600	2,804,666
Senior Exchangeable Notes due 2015 [Member] [Domain] | Consolidation, Eliminations [Member]
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, less allowance for doubtful accounts	0	0
Inventory	0	0
Deferred Tax Assets, Net, Current	0	0
Prepaid and other current assets	0	0
Total current assets	0	0
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	0	0
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	(4,913,429)	(4,575,014)
INTERCOMPANY NOTES RECEIVABLE	(235,161)	(247,694)
OTHER ASSETS	0	0
TOTAL ASSETS	(5,148,590)	(4,822,708)
CURRENT LIABILITIES
Accounts payable	0	0
Current maturities of long-term debt	0	0
Accrued taxes	0	0
Accrued payroll and benefits	0	0
Accrued interest	0	0
Accrued customer incentives	0	0
Other current liabilities	0	0
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	0	0
LONG-TERM DEBT	0	0
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	0	0
OTHER NON-CURRENT LIABILITIES	0	0
INTERCOMPANY PAYABLE	(294,050)	(253,872)
TOTAL SHAREHOLDERS' EQUITY	(4,854,540)	(4,568,836)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	(5,148,590)	(4,822,708)
Senior Notes due 2022 at a fixed interest rate of 3.75% [Member] | Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	52,679	23,324	88,421	68,953
Accounts receivable, less allowance for doubtful accounts	485	386
Inventory	0	0
Deferred Tax Assets, Net, Current	0	0
Prepaid and other current assets	4,247	2,257
Total current assets	57,411	25,967
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	2,315	2,321
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	2,472,796	2,354,270
INTERCOMPANY NOTES RECEIVABLE	20,021	33,831
OTHER ASSETS	32,912	32,961
TOTAL ASSETS	2,585,455	2,449,350
CURRENT LIABILITIES
Accounts payable	1,685	2,132
Current maturities of long-term debt	0	0
Accrued taxes	14	485
Accrued payroll and benefits	8,578	15,044
Accrued interest	4,179	3,576
Accrued customer incentives	0	0
Other current liabilities	3,245	2,925
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	17,701	24,162
LONG-TERM DEBT	698,916	718,321
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	129,743	129,156
OTHER NON-CURRENT LIABILITIES	14,007	16,432
INTERCOMPANY PAYABLE	125,973	116,074
TOTAL SHAREHOLDERS' EQUITY	1,599,115	1,445,205
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,585,455	2,449,350
Senior Notes due 2022 at a fixed interest rate of 3.75% [Member] | Non-Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	61,360	4,384	16,528	9,650
Accounts receivable, less allowance for doubtful accounts	105,181	99,973
Inventory	113,643	127,966
Deferred Tax Assets, Net, Current	66,509	15,845
Prepaid and other current assets	34,649	39,251
Total current assets	381,342	287,419
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,565,782	1,573,309
NET PROPERTY, PLANT AND EQUIPMENT	757,923	704,717
INVESTMENT IN JOINT VENTURE	73,830	72,419
INVESTMENT IN SUBSIDIARIES	0	0
INTERCOMPANY NOTES RECEIVABLE	0	0
OTHER ASSETS	174,723	166,802
TOTAL ASSETS	2,953,600	2,804,666
CURRENT LIABILITIES
Accounts payable	106,808	68,249
Current maturities of long-term debt	0	0
Accrued taxes	30,045	13,339
Accrued payroll and benefits	9,893	13,024
Accrued interest	909	1,280
Accrued customer incentives	8,936	10,849
Other current liabilities	21,923	15,715
Current liabilities for dispositions and discontinued operations	8,398	8,105
Total current liabilities	186,912	130,561
LONG-TERM DEBT	76,555	76,731
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	71,799	73,590
PENSION AND OTHER POSTRETIREMENT BENEFITS	29,086	30,426
OTHER NON-CURRENT LIABILITIES	7,264	7,468
INTERCOMPANY PAYABLE	168,076	137,797
TOTAL SHAREHOLDERS' EQUITY	2,413,908	2,348,093
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,953,600	2,804,666
Senior Notes due 2022 at a fixed interest rate of 3.75% [Member] | Consolidation, Eliminations [Member]
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, less allowance for doubtful accounts	0	0
Inventory	0	0
Deferred Tax Assets, Net, Current	0	0
Prepaid and other current assets	0	0
Total current assets	0	0
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	0	0
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	(4,071,911)	(3,799,475)
INTERCOMPANY NOTES RECEIVABLE	(235,161)	(247,694)
OTHER ASSETS	0	0
TOTAL ASSETS	(4,307,072)	(4,047,169)
CURRENT LIABILITIES
Accounts payable	0	0
Current maturities of long-term debt	0	0
Accrued taxes	0	0
Accrued payroll and benefits	0	0
Accrued interest	0	0
Accrued customer incentives	0	0
Other current liabilities	0	0
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	0	0
LONG-TERM DEBT	0	0
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	0	0
OTHER NON-CURRENT LIABILITIES	0	0
INTERCOMPANY PAYABLE	(294,049)	(253,871)
TOTAL SHAREHOLDERS' EQUITY	(4,013,023)	(3,793,298)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ (4,307,072)	$ (4,047,169)