Segment Information (Summary Of Information By Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Segment Revenues	$ 171,229	$ 170,818	$ 419,946	$ 423,738
Total consolidated revenues	151,911	152,891	381,835	387,494
Operating Income	22,483	28,822	39,329	49,249
Depreciation, depletion and amortization	8,302	9,092	19,271	22,916
Basis of Real Estate Sold	381	(520)	1,623	10,053
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income	38,940	40,057	85,109	89,211
Depreciation, depletion and amortization	7,577	8,465	17,111	19,778
Resource [Member]
Segment Reporting Information [Line Items]
Segment Revenues	82,144	86,770	156,486	172,587
Elimination of intersegment revenues	(19,318)	(17,927)	(38,111)	(36,244)
Operating Income	23,631	25,598	39,011	47,208
Depreciation, depletion and amortization	6,061	6,519	12,071	13,851
Real Estate [Member]
Segment Reporting Information [Line Items]
Segment Revenues	2,353	14,809	19,181	46,808
Operating Income	1,255	9,929	14,256	29,295
Depreciation, depletion and amortization	9	21	27	21
Basis of Real Estate Sold	397	2,714	1,806	13,287
Wood Products [Member]
Segment Reporting Information [Line Items]
Segment Revenues	86,732	69,239	244,279	204,343
Operating Income	15,232	2,896	31,948	8,548
Depreciation, depletion and amortization	1,507	1,925	5,013	5,906
Eliminations and Adjustments [Member]
Segment Reporting Information [Line Items]
Operating Income	(1,178)	1,634	(106)	4,160
Basis of Real Estate Sold	(16)	(3,234)	(183)	(3,234)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating Income	(16,457)	(11,235)	(45,780)	(39,962)
Depreciation, depletion and amortization	$ 725	$ 627	$ 2,160	$ 3,138