PARTNERSHIP TIMBERLAND ACQUISITIONS (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) a	Dec. 31, 2018 USD ($) a
Business Acquisition [Line Items]
Funds held by like-kind exchange intermediaries		$ 598
Productive Land
Business Acquisition [Line Items]
Transfer of non-strategic timberland to seller (in acres) | a		365
Transfer of non-strategic timberland to seller, value		$ 214
Western Washington
Business Acquisition [Line Items]
Land acquired (in acres) | a	322	1,342
Assets acquired	$ 751	$ 7,200
Western Washington | Land
Business Acquisition [Line Items]
Assets acquired	98	869
Western Washington | Timber and Roads
Business Acquisition [Line Items]
Assets acquired	$ 653	$ 6,300