Investment In Real Estate ( Real Estate Investment By Segment) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Operating property	$ 239,447	$ 239,405
Development property	548,768	551,495
Investment property	8,606	8,606
Total real estate investments	799,093	797,384
Less: Accumulated depreciation	44,288	41,992
Investment in real estate	754,805	755,392
Residential Real Estate [Member]
Operating property	179,337	178,417
Development property	473,170	478,278
Investment in unconsolidated affiliates	2,272	(2,122)
Commercial Real Estate [Member]
Operating property	1,982
Development property	67,896	65,465
Investment property	1,753	1,753
Rural Land Sales [Member]
Operating property	139	139
Development property	7,396	7,446
Investment property
Forestry [Member]
Operating property	57,479	60,339
Investment property	952	952
Other [Member]
Operating property	510	510
Development property	306	306
Investment property	$ 5,901	$ 5,901