OTHER ASSETS - Asset Balances (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Long-term and prepaid and secondary roads	$ 8,463	$ 7,072
Deferred financing costs related to revolving debt	102	213
Investments in marketable equity securities	$ 10,582	0
Pope Resources
Finite-Lived Intangible Assets [Line Items]
Number of limited partnership units (in shares)	114,400
Original share price (in dollars per share)	$ 65.90
Pacific Northwest
Finite-Lived Intangible Assets [Line Items]
Long-term and prepaid and secondary roads	$ 4,198	4,000
New Zealand
Finite-Lived Intangible Assets [Line Items]
Long-term and prepaid and secondary roads	4,265	3,072
Software Costs
Finite-Lived Intangible Assets [Line Items]
Capitalized software costs	$ 3,605	$ 3,776