VARIABLE INTEREST ENTITIES - Summary of VIEs (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
ASSETS
Cash and cash equivalents	$ 431,806	$ 84,507	$ 78,151
Accounts receivable	42,352	49,082
Assets held for sale	56,397	3,449
Other current assets	2,212	6,765
Total current assets	619,930	170,565
TOTAL ASSETS	3,706,414	3,728,733
Liabilities and Equity:
Accounts payable	27,989	24,790
Accrued taxes	18,503	7,347
Deferred revenue	19,899	11,112
Distribution payable, Timber Funds	49,209	0
Other current liabilities	28,983	29,234
Total current liabilities	368,235	91,135
Funds’ equity	1,710,393	1,474,057
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	3,706,414	$ 3,728,733
Variable Interest Entity, Primary Beneficiary | ORM Timber Funds
ASSETS
Cash and cash equivalents	12,202
Restricted cash, Timber Funds	49,209
Accounts receivable	513
Assets held for sale	54,926
Other current assets	79
Total current assets	116,929
Other assets	23
TOTAL ASSETS	116,952
Liabilities and Equity:
Accounts payable	547
Intercompany payable	160
Accrued taxes	71
Deferred revenue	164
Distribution payable, Timber Funds	49,209
Other current liabilities	36
Total current liabilities	50,187
Funds’ equity	66,765
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	116,952
Variable Interest Entity, Primary Beneficiary | Ferncliff Investors
ASSETS
Cash and cash equivalents	391
Total current assets	391
Advances to real estate joint venture entity	1,000
TOTAL ASSETS	1,391
Liabilities and Equity:
Total current liabilities	1,897
Funds’ equity	(506)
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	$ 1,391