SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Sales	$ 178,793	$ 156,417	$ 184,800	$ 191,546	$ 166,146	$ 200,890	$ 245,906	$ 203,196	$ 711,556	$ 816,138	$ 819,596
Total Operating Income									107,027	170,068	215,491
Unallocated interest expense and other									(26,409)	(27,502)	(32,231)
INCOME BEFORE INCOME TAXES									80,618	142,566	183,260
Total capital expenditures									63,996	62,325	65,345
Payments to acquire timberlands									142,287	57,608	242,910
Total Gross Capital Expenditures									206,283	119,933	308,255
Spending on office building									0	0	6,084
Real estate development investments									6,803	9,501	15,784
Depreciation, Depletion and Amortization									128,235	144,121	146,001
Improved Development
Segment Reporting Information [Line Items]
Sales									5,882	8,336	6,889
Unimproved Development
Segment Reporting Information [Line Items]
Sales									19,476	8,621	16,405
Rural
Segment Reporting Information [Line Items]
Sales									29,852	22,689	18,632
Timberlands & Non-Strategic
Segment Reporting Information [Line Items]
Sales									19,133	98,872	70,590
Other
Segment Reporting Information [Line Items]
Sales									544	57	(541)
Large Dispositions
Segment Reporting Information [Line Items]
Sales											95,351
Real Estate
Segment Reporting Information [Line Items]
Sales									74,887	138,575	207,326
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
Total Operating Income											67,000
Depreciation, Depletion and Amortization											18,400
Large Dispositions											9,800
Trading
Segment Reporting Information [Line Items]
Sales									115,283	148,722
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
Sales									194,111	169,995	144,510
Total Operating Income									57,804	44,245	42,254
Total capital expenditures									34,574	35,388	34,476
Payments to acquire timberlands									98,927	45,943	220,051
Depreciation, Depletion and Amortization									61,923	58,609	49,357
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
Sales									85,414	109,832	91,877
Total Operating Income									(12,427)	8,137	1,127
Total capital expenditures									11,220	9,311	10,254
Payments to acquire timberlands									7,340	0	1,483
Depreciation, Depletion and Amortization									29,165	32,779	32,008
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
Sales									241,861	249,014	223,299
Total Operating Income									48,035	62,754	57,567
Total capital expenditures									17,357	17,318	17,046
Payments to acquire timberlands									36,020	11,665	21,376
Depreciation, Depletion and Amortization									27,761	28,007	27,499
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Sales									74,887	138,575	207,326
Total Operating Income									38,665	76,240	130,856
Total capital expenditures									204	284	1,348
Depreciation, Depletion and Amortization									8,229	23,566	36,343
Non-Cash Cost of Land and Improved Development									12,565	23,553	23,498
Operating Segments | Real Estate | Improved Development
Segment Reporting Information [Line Items]
Sales									5,882	8,336	6,889
Operating Segments | Real Estate | Unimproved Development
Segment Reporting Information [Line Items]
Sales									19,476	8,621	16,405
Operating Segments | Real Estate | Rural
Segment Reporting Information [Line Items]
Sales									29,852	22,689	18,632
Operating Segments | Real Estate | Timberlands & Non-Strategic
Segment Reporting Information [Line Items]
Sales									19,133	98,872	70,590
Operating Segments | Real Estate | Other
Segment Reporting Information [Line Items]
Sales									544	57	(541)
Operating Segments | Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
Sales									0	0	95,351
Operating Segments | Trading
Segment Reporting Information [Line Items]
Sales									115,438	148,814	152,584
Total Operating Income									8	953	4,578
Corporate and other
Segment Reporting Information [Line Items]
Total Operating Income									(25,058)	(22,261)	(20,891)
Total capital expenditures									641	24	2,221
Depreciation, Depletion and Amortization									1,157	1,160	794
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales									$ (155)	$ (92)	$ 0