Segment Information (Summary Of Information By Business Segment) (Details) (USD $) In Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Segment Reporting Information [Line Items]
Segment Revenues	$ 170,818		$ 174,599		$ 423,738		$ 428,705
Total consolidated revenues	152,891		158,877		387,494		393,273
Earnings from continuing operations before taxes	28,822		19,752		49,249		39,336
Depreciation, depletion and amortization, excluding corporate	8,465		8,904		19,778		22,077
Depreciation, depletion and amortization	9,092		9,499		22,916		23,857
Basis of real estate sold	(520)		20,779		10,053		25,492
Adjustment to the cost basis of land sales, pre-tax	(3,234)	[1]	0	[1]	(3,234)	[1]	0	[1]
Asset impairment	1,180		0		1,180		0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings from continuing operations before taxes	40,057		32,621		89,211		78,340
Resource [Member]
Segment Reporting Information [Line Items]
Segment Revenues	86,770		77,448		172,587		172,716
Elimination of intersegment revenues	(17,927)		(15,722)		(36,244)		(35,432)
Earnings from continuing operations before taxes	25,598		24,336		47,208		49,283
Depreciation, depletion and amortization	6,519		6,886		13,851		15,889
Real Estate [Member]
Segment Reporting Information [Line Items]
Segment Revenues	14,809		32,254		46,808		46,157
Earnings from continuing operations before taxes	9,929		9,788		29,295		16,803
Depreciation, depletion and amortization	21	[2]	0	[2]	21	[2]	0	[2]
Basis of real estate sold	2,714		20,779		13,287		25,492
Wood Products [Member]
Segment Reporting Information [Line Items]
Segment Revenues	69,239		64,897		204,343		209,832
Earnings from continuing operations before taxes	2,896		(608)		8,548		10,576
Depreciation, depletion and amortization	1,925		2,018		5,906		6,188
Eliminations and Adjustments [Member]
Segment Reporting Information [Line Items]
Earnings from continuing operations before taxes	1,634		(895)		4,160		1,678
Corporate [Member]
Segment Reporting Information [Line Items]
Earnings from continuing operations before taxes	(11,235)		(12,869)		(39,962)		(39,004)
Depreciation, depletion and amortization	$ 627		$ 595		$ 3,138		$ 1,780

[1] See Note 1 to the consolidated condensed financial statements for additional information.

[2] Excludes $1.2 million asset impairment charge