DEBT - Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt, net of deferred financing costs	$ 1,359,400
Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	1,301,771
Less: Deferred financing costs	(2,338)
Long-term debt, net of deferred financing costs	1,299,433	$ 1,300,336
Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	59,975
Less: Deferred financing costs	(8)
Long-term debt, net of deferred financing costs	$ 59,967	$ 60,179
Term Credit Agreement borrowings due 2028 at a variable interest rate of 1.8% at March 31, 2021
Debt Instrument [Line Items]
Effective fixed interest rate	3.20%
Term Credit Agreement borrowings due 2028 at a variable interest rate of 1.8% at March 31, 2021 | LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.60%
Term Credit Agreement borrowings due 2028 at a variable interest rate of 1.8% at March 31, 2021 | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 350,000
Stated interest rate	1.70%
Senior Notes due 2022 at a fixed interest rate of 3.75% | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 325,000
Stated interest rate	3.75%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 2.1% at March 31, 2021
Debt Instrument [Line Items]
Effective fixed interest rate	2.80%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 2.1% at March 31, 2021 | LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.90%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 2.1% at March 31, 2021 | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 300,000
Stated interest rate	2.00%
2020 Incremental Term Loan Facility borrowings due 2025 at a variable interest rate of 2.0% at March 31, 2021
Debt Instrument [Line Items]
Effective fixed interest rate	2.30%
2020 Incremental Term Loan Facility borrowings due 2025 at a variable interest rate of 2.0% at March 31, 2021 | LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.85%
2020 Incremental Term Loan Facility borrowings due 2025 at a variable interest rate of 2.0% at March 31, 2021 | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 250,000
Stated interest rate	2.00%
New Zealand subsidiary noncontrolling interests shareholder loan due 2025 at a fixed interest rate of 2.95% | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 24,074
Stated interest rate	2.95%
Due 2025 at a fixed interest rate of 6.1% | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 11,512
Stated interest rate	6.10%
Due 2028 at a fixed interest rate of 4.1% | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 11,984
Stated interest rate	4.10%
Due 2033 at a fixed interest rate of 5.3% | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 19,363
Stated interest rate	5.30%
Due 2036 at a fixed interest rate of 5.4% | Excluding Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 9,838
Stated interest rate	5.40%
Due 2022 at a variable interest rate of 2.0% at March 31, 2021 | Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 11,000
Stated interest rate	2.00%
Due 2022 at a variable interest rate of 2.0% at March 31, 2021 | Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 14,000
Stated interest rate	2.00%
Due 2023 at a fixed interest rate of 5.1% | Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 19,431
Stated interest rate	5.10%
Effective fixed interest rate	3.90%
Due 2024 at a fixed interest rate of 4.5% | Timber Funds
Debt Instrument [Line Items]
Total debt, excluding Timber Funds	$ 15,544
Stated interest rate	4.50%
Effective fixed interest rate	3.20%