Segment Information - Information by Business Segment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable operating segments | Segment			5
Segment Reporting Information [Line Items]
Operating Revenues	$ 37,846	$ 68,164	$ 54,937	$ 662,250
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	1,591	23,310	(1,196)	533,212
Total assets	1,319,460		1,319,460		$ 1,303,135
Residential real estate
Segment Reporting Information [Line Items]
Operating Revenues	4,037	47,751	9,474	53,468
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	(378)	25,891	6	26,134
Total assets	114,049		114,049		135,317
Commercial real estate
Segment Reporting Information [Line Items]
Operating Revenues	4,660	980	4,660	3,265
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	(8)	164	(612)	813
Total assets	58,836		58,836		62,931
Resorts and leisure
Segment Reporting Information [Line Items]
Operating Revenues	19,318	16,482	27,121	23,479
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	3,466	2,257	535	503
Total assets	78,071		78,071		79,021
Leasing operations
Segment Reporting Information [Line Items]
Operating Revenues	2,167	1,687	4,212	2,877
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	283	661	483	1,037
Total assets	77,514		77,514		74,800
Forestry
Segment Reporting Information [Line Items]
Operating Revenues	7,664	1,144	9,470	579,017
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	6,770	1,012	8,408	515,110
Total assets	22,264		22,264		20,521
Other
Segment Reporting Information [Line Items]
Operating Revenues	0	120	0	144
Income (loss) before equity in loss from unconsolidated affiliates and income taxes:	(8,542)	$ (6,675)	(10,016)	$ (10,385)
Total assets	$ 968,726		$ 968,726		$ 930,545