MERGER WITH POPE RESOURCES - Timberlands and Property, Plant and Equipment Recognized (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Total		$ 200,368	$ 128,235	$ 144,121
Corporate and other
Business Acquisition [Line Items]
Total		1,427	1,157	1,160
Merger with Pope Resources
Business Acquisition [Line Items]
Depletion	$ 1,412
Depreciation	547
Total	1,959
Merger with Pope Resources | Corporate and other
Business Acquisition [Line Items]
Depletion	0
Depreciation	41
Total	41
Pacific Northwest Timber | Operating Segments
Business Acquisition [Line Items]
Total		47,107	29,165	32,779
Pacific Northwest Timber | Merger with Pope Resources | Operating Segments
Business Acquisition [Line Items]
Depletion	2,412
Depreciation	0
Total	2,412
Real Estate | Operating Segments
Business Acquisition [Line Items]
Total		53,093	8,229	23,566
Real Estate | Merger with Pope Resources | Operating Segments
Business Acquisition [Line Items]
Depletion	0
Depreciation	506
Total	506
Timber Funds | Operating Segments
Business Acquisition [Line Items]
Total		$ 11,884	$ 0	$ 0
Timber Funds | Merger with Pope Resources | Operating Segments
Business Acquisition [Line Items]
Depletion	(1,000)
Depreciation	0
Total	$ (1,000)