Information by Business Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 8,056	$ 14,055
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	(2,468)	(222)
Revenues	26,773	30,518
Assets	651,321		645,521
Residential Real Estate
Segment Reporting Information [Line Items]
Revenues	7,781	3,746
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	295	(2,207)
Assets	141,962		141,526
Commercial Real Estate
Segment Reporting Information [Line Items]
Revenues	226	6,026
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	(676)	1,827
Assets	62,305		64,961
Rural land
Segment Reporting Information [Line Items]
Revenues		4,283
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	(20)	2,140
Assets	6,175		6,219
Resorts, leisure and leasing operations
Segment Reporting Information [Line Items]
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	(945)	(1,525)
Revenues	9,022	6,969
Assets	129,946		125,596
Forestry
Segment Reporting Information [Line Items]
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	3,525	2,761
Revenues	9,695	9,494
Assets	52,006		53,839
Other
Segment Reporting Information [Line Items]
Consolidated (loss) from operations before equity in loss from unconsolidated affiliates and income taxes	(4,647)	(3,218)
Revenues	49
Assets	$ 258,927		$ 253,380