Segment Information (Summary Of Information By Business Segment) (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
Segment Reporting Information [Line Items]
Segment Revenues	$ 133,212	$ 117,540	$ 272,465	$ 229,924
Operating Income	23,774	10,813	44,046	16,846
Depreciation, depletion and amortization	5,158	5,181	12,025	10,969
Basis of real estate sold	450	798	907	1,242
Operating Segments [Member]
Segment Reporting Information [Line Items]
Segment Revenues	146,060	126,175	297,207	248,717
Operating Income	38,543	25,834	76,550	46,169
Depreciation, depletion and amortization	4,574	4,447	10,688	9,534
Resource [Member]
Segment Reporting Information [Line Items]
Segment Revenues	45,269	33,888	100,237	74,342
Operating Income	14,467	6,711	29,992	15,380
Depreciation, depletion and amortization	3,040	2,792	7,632	6,010
Real Estate [Member]
Segment Reporting Information [Line Items]
Segment Revenues	5,809	8,664	10,444	16,828
Operating Income	4,116	6,689	7,199	13,001
Depreciation, depletion and amortization	14	9	27	18
Basis of real estate sold	(584)	(914)	(1,200)	(1,409)
Wood Products [Member]
Segment Reporting Information [Line Items]
Segment Revenues	94,982	83,623	186,526	157,547
Operating Income	19,725	11,672	38,635	16,716
Depreciation, depletion and amortization	1,520	1,646	3,029	3,506
Eliminations and Adjustments [Member]
Segment Reporting Information [Line Items]
Segment Revenues	(12,848)	(8,635)	(24,742)	(18,793)
Operating Income	235	762	724	1,072
Corporate [Member]
Segment Reporting Information [Line Items]
Operating Income	(14,769)	(15,021)	(32,504)	(29,323)
Depreciation, depletion and amortization	584	734	1,337	1,435
Basis of Real Estate Sold Eliminations and Adjustments [Member]
Segment Reporting Information [Line Items]
Basis of real estate sold	$ 134	$ 116	$ 293	$ 167