SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Capital Expenditure (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total capital expenditures	$ 66,500	$ 63,996	$ 62,325
Purchase of timberlands	24,695	142,287	57,608
Total Gross Capital Expenditures	91,195	206,283	119,933
Real estate development investments	6,462	6,803	9,501
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
Total capital expenditures	2,300
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
Total capital expenditures	35,505	34,574	35,388
Purchase of timberlands	24,241	98,927	45,943
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
Total capital expenditures	11,367	11,220	9,311
Purchase of timberlands	0	7,340	0
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
Total capital expenditures	16,595	17,357	17,318
Purchase of timberlands	454	36,020	11,665
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
Total capital expenditures	2,606	0	0
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Total capital expenditures	428	204	284
Corporate and other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 0	$ 641	$ 24