Investment In Real Estate (Real Estate Investment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Real Estate Properties [Line Items]
Total real estate investments	$ 431,691	$ 797,384
Less: Accumulated depreciation	44,489	41,992
Investment in real estate	387,202	755,392
Residential Real Estate [Member]
Real Estate Properties [Line Items]
Operating property	136,563	178,417
Development property	157,245	478,278
Investment in unconsolidated affiliates	2,259	(2,122)
Commercial Real Estate [Member]
Real Estate Properties [Line Items]
Operating property	4,691
Development property	57,600	65,465
Investment property	700	1,753
Rural Land Sales [Member]
Real Estate Properties [Line Items]
Operating property	139	139
Development property	9,573	7,446
Forestry [Member]
Real Estate Properties [Line Items]
Operating property	58,087	60,339
Investment property	953	952
Other [Member]
Real Estate Properties [Line Items]
Operating property	410	510
Development property		306
Investment property	3,471	5,901
Total Operating Property [Member]
Real Estate Properties [Line Items]
Operating property	199,890	239,405
Total Development Property [Member]
Real Estate Properties [Line Items]
Development property	224,418	551,495
Total Investment Property [Member]
Real Estate Properties [Line Items]
Investment property	$ 5,124	$ 8,606