Segment Reporting Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 24,385	$ 25,042
Cost of sales	(18,515)	(16,608)
Operating, general and administrative expenses	(12,322)	(6,058)
Income (loss) from operations	(6,452)	2,376
Partnership Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	12,076	15,171
Cost of sales	(5,305)	(7,188)
Operating, general and administrative expenses	(1,030)	(1,072)
Income (loss) from operations	5,741	6,911
Funds Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	12,050	9,440
Cost of sales	(12,893)	(9,139)
Operating, general and administrative expenses	(1,162)	(1,178)
Income (loss) from operations	(2,005)	(877)
Timberland Investment Management
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0
Cost of sales	0	0
Operating, general and administrative expenses	(1,282)	(1,221)
Income (loss) from operations	(1,282)	(1,221)
Real Estate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	259	431
Cost of sales	(317)	(281)
Operating, general and administrative expenses	(1,352)	(823)
Income (loss) from operations	(1,410)	(673)
Internal
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	26,178	26,726
Operating, general and administrative expenses	(14,115)	(7,742)
Income (loss) from operations	(6,452)	2,376
Internal | Partnership Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	12,275	15,372
Operating, general and administrative expenses	(1,279)	(1,317)
Income (loss) from operations	5,691	6,867
Internal | Funds Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	12,050	9,440
Operating, general and administrative expenses	(2,569)	(2,489)
Income (loss) from operations	(3,412)	(2,188)
Internal | Timberland Investment Management
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,459	1,363
Operating, general and administrative expenses	(1,352)	(1,290)
Income (loss) from operations	107	73
Internal | Real Estate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	394	551
Operating, general and administrative expenses	(1,390)	(856)
Income (loss) from operations	(1,313)	(586)
Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,793)	(1,684)
Operating, general and administrative expenses	1,793	1,684
Income (loss) from operations	0	0
Eliminations | Partnership Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(199)	(201)
Operating, general and administrative expenses	249	245
Income (loss) from operations	50	44
Eliminations | Funds Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0
Operating, general and administrative expenses	1,407	1,311
Income (loss) from operations	1,407	1,311
Eliminations | Timberland Investment Management
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,459)	(1,363)
Operating, general and administrative expenses	70	69
Income (loss) from operations	(1,389)	(1,294)
Eliminations | Real Estate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(135)	(120)
Operating, general and administrative expenses	38	33
Income (loss) from operations	(97)	(87)
Corporate, Non-Segment, Before Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0
Operating, general and administrative expenses	(7,525)	(1,790)
Income (loss) from operations	(7,525)	(1,790)
Corporate, Non-Segment, Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0
Operating, general and administrative expenses	29	26
Income (loss) from operations	29	26
Corporate, Non-Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0
Cost of sales	0	0
Operating, general and administrative expenses	(7,496)	(1,764)
Income (loss) from operations	$ (7,496)	$ (1,764)