LEASES - Narrative (Details)	3 Months Ended
	Mar. 31, 2019 a lease
United States | Minimum | Timberland Leases
Lessee, Lease, Description [Line Items]
Contract terms, in years	30 years
United States | Maximum | Timberland Leases
Lessee, Lease, Description [Line Items]
Contract terms, in years	65 years
New Zealand | Minimum | Timberland Leases
Lessee, Lease, Description [Line Items]
Contract terms, in years	30 years
New Zealand | Maximum | Timberland Leases
Lessee, Lease, Description [Line Items]
Contract terms, in years	99 years
Matariki Crown Forest Licenses
Lessee, Lease, Description [Line Items]
Operating leases, renewal term	1 year
Matariki Crown Forest Licenses | Timberland Leases
Lessee, Lease, Description [Line Items]
Operating leases, renewal term	35 years
Matariki Crown Forest Licenses | Minimum | Timberland Leases
Lessee, Lease, Description [Line Items]
Lessee, Lease, Termination Period	35 years
Matariki Crown Forest Licenses | Maximum | Timberland Leases
Lessee, Lease, Description [Line Items]
Lessee, Lease, Termination Period	45 years
Matariki Crown Forest Licenses | New Zealand
Lessee, Lease, Description [Line Items]
Number of leases under termination notice | lease	2
Leases Under Termination Notice, Acres | a	9,000
Number of fixed term forest leases expiring | lease	2
Fixed Term Forest Leases Expiring, Acres | a	3,000
Number Of Forestry Rights Under Termination Notice | lease	2
Forestry Rights Under Termination Notice, Acres | a	33,000