VARIABLE INTEREST ENTITIES - Summary of VIEs (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 314,308	$ 84,507
Accounts receivable	51,819	49,082
Assets held for sale	111,282	3,449
Other current assets	3,716	6,765
Total current assets	530,954	170,565
Timber and timberlands, net of depletion and amortization	3,135,519	3,262,126
TOTAL ASSETS	3,959,269	3,728,733
Liabilities and Equity:
Accounts payable	29,226	24,790
Accrued taxes	14,564	7,347
Accrued interest	7,081	6,325
Deferred revenue	23,259	11,112
Other current liabilities	27,355	29,234
Total current liabilities	310,193	91,135
Total long-term debt, net	1,252,643
Funds’ equity	1,609,348	1,474,057
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	3,959,269	$ 3,728,733
Variable Interest Entity, Primary Beneficiary | ORM Timber Funds
ASSETS
Cash and cash equivalents	4,469
Accounts receivable	3,239
Assets held for sale	104,291
Other current assets	68
Total current assets	112,067
Timber and timberlands, net of depletion and amortization	316,249
Other assets	74
TOTAL ASSETS	428,390
Liabilities and Equity:
Accounts payable	1,127
Intercompany payable	880
Accrued taxes	292
Accrued interest	508
Deferred revenue	339
Other current liabilities	464
Total current liabilities	3,610
Total long-term debt, net	59,755
Funds’ equity	365,025
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	428,390
Variable Interest Entity, Primary Beneficiary | Ferncliff Investors
ASSETS
Cash and cash equivalents	295
Total current assets	295
Advances to real estate joint venture entity	1,000
TOTAL ASSETS	1,295
Liabilities and Equity:
Total current liabilities	1,818
Funds’ equity	(523)
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	$ 1,295