Segment and Geographical Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Segment Reporting Information [Line Items]
Assets	$ 3,828,051				$ 3,828,051				$ 3,122,951
Sales	409,077		348,096		802,796		684,667
Operating Income (Loss)	110,561		94,098		225,924		176,848
Depreciation, depletion and amortization	43,667		34,179		79,659		64,592
Forest Resources [Member]
Segment Reporting Information [Line Items]
Assets	2,275,145				2,275,145				1,690,030
Sales	109,060		52,663		166,162		104,858
Operating Income (Loss)	20,890		8,249		34,145		16,254
Depreciation, depletion and amortization	27,291		17,066		43,735		33,900
Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Assets	85,018				85,018				112,647
Sales	13,376		11,680		37,673		24,326
Operating Income (Loss)	6,105		5,999		22,947		12,477
Depreciation, depletion and amortization	2,469		1,600		6,646		3,445
Performance Fibers Segment [Member]
Segment Reporting Information [Line Items]
Assets	1,067,673				1,067,673				902,309
Sales	253,025		254,509		537,213		505,364
Operating Income (Loss)	79,081		83,727		170,751		164,357
Depreciation, depletion and amortization	13,649		15,139		28,802		26,500
Wood Products Segment [Member]
Segment Reporting Information [Line Items]
Assets	0	[1]			0	[1]			18,454	[1]
All Other Segments [Member]
Segment Reporting Information [Line Items]
Assets	31,045				31,045				23,296
Sales	33,872		29,268		62,099		50,409
Operating Income (Loss)	1,779		1,148		1,944		218
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Sales	(256)	[2]	(24)	[2]	(351)	[2]	(290)	[2]
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Assets	369,170				369,170				376,215
Operating Income (Loss)	2,706	[3]	(5,025)	[3]	(3,863)	[3]	(16,458)	[3]
All Other Segments And Unallocated Amount To Segment [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	$ 258		$ 374		$ 476		$ 747

[1] The Company sold its Wood Products segment during the first quarter of 2013. See Note 2 — Sale of Wood Products Business for additional information.

[2] Intersegment eliminations primarily reflect sales from our Forest Resources segment to our Performance Fibers segment.

[3] The three and six months ended June 30, 2013 includes a $16.1 million gain related to the consolidation of the New Zealand JV. See Note 6 — Joint Venture Investment.