VARIABLE INTEREST ENTITIES - Summary of VIEs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 362,173	$ 84,507
Accounts receivable	30,018	49,082
Other current assets	749	6,765
Total current assets	451,431	170,565
TOTAL ASSETS	3,636,356	3,728,733
Liabilities and Equity:
Accounts payable	23,447	24,790
Accrued taxes	12,446	7,347
Distributions payable, Timber Funds	6,341	0
Other current liabilities	25,863	29,234
Total current liabilities	231,721	91,135
Funds’ equity	1,771,776	1,474,057
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	3,636,356	3,728,733
Fund II Timberland Dispositions
Liabilities and Equity:
Net proceeds from large disposition of timberlands	154,740	$ 0	$ 0
Variable Interest Entity, Primary Beneficiary | ORM Timber Funds
ASSETS
Cash and cash equivalents	3,493
Restricted cash, Timber Funds	6,341
Accounts receivable	9
Intercompany receivable	41
Other current assets	26
Total current assets	9,910
TOTAL ASSETS	9,910
Liabilities and Equity:
Accounts payable	22
Accrued taxes	32
Distributions payable, Timber Funds	6,341
Other current liabilities	3,546
Total current liabilities	9,941
Funds’ equity	(31)
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	9,910
Variable Interest Entity, Primary Beneficiary | ORM Timber Funds | Fund II Timberland Dispositions
Liabilities and Equity:
Other current liabilities	3,500
Variable Interest Entity, Primary Beneficiary | Ferncliff Investors
ASSETS
Cash and cash equivalents	1,508
Total current assets	1,508
TOTAL ASSETS	1,508
Liabilities and Equity:
Total current liabilities	472
Total non-current liabilities	2,170
Total liabilities	2,642
Funds’ equity	(1,134)
TOTAL LIABILITIES, NONCONTROLLING INTERESTS IN THE OPERATING PARTNERSHIP AND SHAREHOLDERS’ EQUITY	$ 1,508