Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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DEBT - Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	May 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total long-term debt, net	$ 1,252,643
Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	1,394,171
Add: Fair value adjustments, excluding Timber Funds	7,478
Less: Unamortized discounts, excluding Timber Funds	(3,583)
Current maturities of long-term debt, excluding Timber Funds (c)	(199,830)		$ 0
Less: Deferred financing costs, excluding Timber Funds	(5,348)
Total long-term debt, net	1,192,888		1,300,336
Timber Funds
Debt Instrument [Line Items]
Total long-term debt	57,380
Add: Fair value adjustments, excluding Timber Funds	2,382
Less: Deferred financing costs, excluding Timber Funds	(7)
Total long-term debt, net	59,755		$ 60,179
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 long-term debt	$ 350,000
Stated interest rate	1.70%
Effective fixed interest rate	3.10%
Term Credit Agreement borrowings due 2028 at a variable interest rate of 1.8% at March 31, 2021 \| Excluding Timber Funds \| LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.60%
Senior Notes due 2022 at a fixed interest rate of 3.75% \| Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 325,000
Stated interest rate	3.75%	3.75%
Senior Notes due 2031 at a fixed interest rate of 2.75% \| Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 450,000
Stated interest rate	2.75%	2.75%
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 long-term debt	$ 200,000
Stated interest rate	1.70%
Effective fixed interest rate	2.40%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 2.1% at March 31, 2021 \| Excluding Timber Funds \| LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.65%
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 long-term debt	$ 24,171
Stated interest rate	2.95%
Due 2025 at a fixed interest rate of 6.1% \| Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 10,000
Stated interest rate	6.10%
Due 2028 at a fixed interest rate of 4.1% \| Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 11,000
Stated interest rate	4.10%
Due 2029 at a fixed interest rate of 5.3% \| Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 16,000
Stated interest rate	5.30%
Due 2029 at a fixed interest rate of 5.4% \| Excluding Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 8,000
Stated interest rate	5.40%
Due 2022 at a variable interest rate of 2.0% at June 30, 2021 \| Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 11,000
Stated interest rate	2.00%
Due 2022 at a variable interest rate of 2.0% at June 30, 2021 \| Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 14,000
Stated interest rate	2.00%
Due 2023 at a fixed interest rate of 5.1% \| Timber Funds
Debt Instrument [Line Items]
Total long-term debt	$ 17,980
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 long-term debt	$ 14,400
Stated interest rate	4.50%
Effective fixed interest rate	3.20%