Consolidating Financial Statements Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CURRENT ASSETS
Cash and cash equivalents	$ 280,596	$ 78,603	$ 349,463	$ 74,964
Accounts receivable, less allowance for doubtful accounts	100,359	95,008
Inventory	127,966	121,998
Prepaid and other current assets	57,353	48,893
Total current assets	566,274	344,502
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,573,309	1,503,711
NET PROPERTY, PLANT AND EQUIPMENT	707,038	461,552
INVESTMENT IN JOINT VENTURE	72,419	69,219
INVESTMENT IN SUBSIDIARIES	0	0
INTERCOMPANY NOTES RECEIVABLE	0	0
OTHER ASSETS	203,911	190,364
TOTAL ASSETS	3,122,951	2,569,348
CURRENT LIABILITIES
Accounts payable	70,381	72,873
Current maturities of long-term debt	150,000	28,110
Accrued taxes	13,824	5,223
Accrued payroll and benefits	28,068	26,846
Accrued interest	7,956	7,044
Accrued customer incentives	10,849	10,369
Other current liabilities	18,640	17,855
Current liabilities for dispositions and discontinued operations	8,105	9,931	11,500
Total current liabilities	307,823	178,251
LONG-TERM DEBT	1,120,052	819,229
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	73,590	80,893	81,660
PENSION AND OTHER POSTRETIREMENT BENEFITS	159,582	140,623
OTHER NON-CURRENT LIABILITIES	23,900	27,279
INTERCOMPANY PAYABLE	0	0
TOTAL LIABILITIES	1,684,947	1,246,275
TOTAL SHAREHOLDERS' EQUITY	1,438,004	1,323,073	1,251,582	1,146,206
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,122,951	2,569,348
Parent Company [Member]
CURRENT ASSETS
Cash and cash equivalents	252,888	0	0	0
Accounts receivable, less allowance for doubtful accounts	0	0
Inventory	0	0
Prepaid and other current assets	0	0
Total current assets	252,888	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	1,445,205	1,238,661
INTERCOMPANY NOTES RECEIVABLE	213,863	204,420
OTHER ASSETS	4,148	0
TOTAL ASSETS	1,916,104	1,443,081
CURRENT LIABILITIES
Accounts payable	0	0
Current maturities of long-term debt	150,000	0
Accrued taxes	0	0
Accrued payroll and benefits	0	0
Accrued interest	3,100	8
Accrued customer incentives	0	0
Other current liabilities	0	0
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	153,100	8
LONG-TERM DEBT	325,000	120,000
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 LIABILITIES	478,100	120,008
TOTAL SHAREHOLDERS' EQUITY	1,438,004	1,323,073
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,916,104	1,443,081
Senior Exchangeable Notes due 2012 & 2015 [Member] | Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	3,966	8,977	29,759	2,895
Accounts receivable, less allowance for doubtful accounts	386	3
Inventory	0	0
Prepaid and other current assets	1,566	2,328
Total current assets	5,918	11,308
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	2,321	2,551
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	1,677,782	1,490,444
INTERCOMPANY NOTES RECEIVABLE	14,000	0
OTHER ASSETS	27,779	26,850
TOTAL ASSETS	1,727,800	1,531,153
CURRENT LIABILITIES
Accounts payable	2,099	1,801
Current maturities of long-term debt	0	0
Accrued taxes	485	(28)
Accrued payroll and benefits	15,044	13,810
Accrued interest	379	246
Accrued customer incentives	0	0
Other current liabilities	2,925	1,887
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	20,932	17,716
LONG-TERM DEBT	0	30,000
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	129,156	112,904
OTHER NON-CURRENT LIABILITIES	16,432	20,210
INTERCOMPANY PAYABLE	116,075	111,662
TOTAL LIABILITIES	282,595	292,492
TOTAL SHAREHOLDERS' EQUITY	1,445,205	1,238,661
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,727,800	1,531,153
Senior Exchangeable Notes due 2012 & 2015 [Member] | Issuer Subsidiary [Member]
CURRENT ASSETS
Cash and cash equivalents	19,358	59,976	283,258	67,494
Accounts receivable, less allowance for doubtful accounts	0	0
Inventory	0	0
Prepaid and other current assets	691	808
Total current assets	20,049	60,784
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	1,452,027	1,156,896
INTERCOMPANY NOTES RECEIVABLE	19,831	19,073
OTHER ASSETS	5,182	6,491
TOTAL ASSETS	1,497,089	1,243,244
CURRENT LIABILITIES
Accounts payable	33	10
Current maturities of long-term debt	0	28,110
Accrued taxes	0	0
Accrued payroll and benefits	0	0
Accrued interest	3,197	5,442
Accrued customer incentives	0	0
Other current liabilities	0	0
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	3,230	33,562
LONG-TERM DEBT	718,321	580,647
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 LIABILITIES	721,551	614,209
TOTAL SHAREHOLDERS' EQUITY	775,538	629,035
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,497,089	1,243,244
Senior Exchangeable Notes due 2012 & 2015 [Member] | Non-Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	4,384	9,650	36,446	4,575
Accounts receivable, less allowance for doubtful accounts	99,973	95,005
Inventory	127,966	121,998
Prepaid and other current assets	55,096	45,757
Total current assets	287,419	272,410
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,573,309	1,503,711
NET PROPERTY, PLANT AND EQUIPMENT	704,717	459,001
INVESTMENT IN JOINT VENTURE	72,419	69,219
INVESTMENT IN SUBSIDIARIES	0	0
INTERCOMPANY NOTES RECEIVABLE	0	0
OTHER ASSETS	166,802	157,023
TOTAL ASSETS	2,804,666	2,461,364
CURRENT LIABILITIES
Accounts payable	68,249	71,062
Current maturities of long-term debt	0	0
Accrued taxes	13,339	5,251
Accrued payroll and benefits	13,024	13,036
Accrued interest	1,280	1,348
Accrued customer incentives	10,849	10,369
Other current liabilities	15,715	15,968
Current liabilities for dispositions and discontinued operations	8,105	9,931
Total current liabilities	130,561	126,965
LONG-TERM DEBT	76,731	88,582
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	73,590	80,893
PENSION AND OTHER POSTRETIREMENT BENEFITS	30,426	27,719
OTHER NON-CURRENT LIABILITIES	7,468	7,069
INTERCOMPANY PAYABLE	137,797	111,316
TOTAL LIABILITIES	456,573	442,544
TOTAL SHAREHOLDERS' EQUITY	2,348,093	2,018,820
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,804,666	2,461,364
Senior Exchangeable Notes due 2012 & 2015 [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
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	(4,575,014)	(3,886,001)
INTERCOMPANY NOTES RECEIVABLE	(247,694)	(223,493)
OTHER ASSETS	0	0
TOTAL ASSETS	(4,822,708)	(4,109,494)
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	(253,872)	(222,978)
TOTAL LIABILITIES	(253,872)	(222,978)
TOTAL SHAREHOLDERS' EQUITY	(4,568,836)	(3,886,516)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	(4,822,708)	(4,109,494)
Senior Notes due 2022 at a fixed interest rate of 3.75% [Member] | Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	23,324	68,953	313,017	70,389
Accounts receivable, less allowance for doubtful accounts	386	3
Inventory	0	0
Prepaid and other current assets	2,257	3,136
Total current assets	25,967	72,092
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	0	0
NET PROPERTY, PLANT AND EQUIPMENT	2,321	2,551
INVESTMENT IN JOINT VENTURE	0	0
INVESTMENT IN SUBSIDIARIES	2,354,270	2,018,306
INTERCOMPANY NOTES RECEIVABLE	33,831	19,072
OTHER ASSETS	32,961	33,341
TOTAL ASSETS	2,449,350	2,145,362
CURRENT LIABILITIES
Accounts payable	2,132	1,811
Current maturities of long-term debt	0	28,110
Accrued taxes	485	(28)
Accrued payroll and benefits	15,044	13,810
Accrued interest	3,576	5,688
Accrued customer incentives	0	0
Other current liabilities	2,925	1,887
Current liabilities for dispositions and discontinued operations	0	0
Total current liabilities	24,162	51,278
LONG-TERM DEBT	718,321	610,647
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	0	0
PENSION AND OTHER POSTRETIREMENT BENEFITS	129,156	112,904
OTHER NON-CURRENT LIABILITIES	16,432	20,210
INTERCOMPANY PAYABLE	116,074	111,662
TOTAL LIABILITIES	1,004,145	906,701
TOTAL SHAREHOLDERS' EQUITY	1,445,205	1,238,661
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,449,350	2,145,362
Senior Notes due 2022 at a fixed interest rate of 3.75% [Member] | Non-Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents	4,384	9,650	36,446	4,575
Accounts receivable, less allowance for doubtful accounts	99,973	95,005
Inventory	127,966	121,998
Prepaid and other current assets	55,096	45,757
Total current assets	287,419	272,410
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,573,309	1,503,711
NET PROPERTY, PLANT AND EQUIPMENT	704,717	459,001
INVESTMENT IN JOINT VENTURE	72,419	69,219
INVESTMENT IN SUBSIDIARIES	0	0
INTERCOMPANY NOTES RECEIVABLE	0	0
OTHER ASSETS	166,802	157,023
TOTAL ASSETS	2,804,666	2,461,364
CURRENT LIABILITIES
Accounts payable	68,249	71,062
Current maturities of long-term debt	0	0
Accrued taxes	13,339	5,251
Accrued payroll and benefits	13,024	13,036
Accrued interest	1,280	1,348
Accrued customer incentives	10,849	10,369
Other current liabilities	15,715	15,968
Current liabilities for dispositions and discontinued operations	8,105	9,931
Total current liabilities	130,561	126,965
LONG-TERM DEBT	76,731	88,582
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS	73,590	80,893
PENSION AND OTHER POSTRETIREMENT BENEFITS	30,426	27,719
OTHER NON-CURRENT LIABILITIES	7,468	7,069
INTERCOMPANY PAYABLE	137,797	111,316
TOTAL LIABILITIES	456,573	442,544
TOTAL SHAREHOLDERS' EQUITY	2,348,093	2,018,820
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,804,666	2,461,364
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
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	(3,799,475)	(3,256,967)
INTERCOMPANY NOTES RECEIVABLE	(247,694)	(223,492)
OTHER ASSETS	0	0
TOTAL ASSETS	(4,047,169)	(3,480,459)
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	(253,871)	(222,978)
TOTAL LIABILITIES	(253,871)	(222,978)
TOTAL SHAREHOLDERS' EQUITY	(3,793,298)	(3,257,481)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ (4,047,169)	$ (3,480,459)