Revenue from Contract with Customer (Log Sale and Other Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 24,385	$ 25,042
Partnership Timber
Disaggregation of Revenue [Line Items]
Revenue	12,076	15,171
Funds Timber
Disaggregation of Revenue [Line Items]
Revenue	12,050	9,440
Log sale revenue | Partnership Timber
Disaggregation of Revenue [Line Items]
Revenue	9,861	14,722
Log sale revenue | Funds Timber
Disaggregation of Revenue [Line Items]
Revenue	11,999	8,860
Timber deed sale revenue | Partnership Timber
Disaggregation of Revenue [Line Items]
Revenue	1,638	0
Timber deed sale revenue | Funds Timber
Disaggregation of Revenue [Line Items]
Revenue	4	0
Other revenue | Partnership Timber
Disaggregation of Revenue [Line Items]
Revenue	577	449
Other revenue | Funds Timber
Disaggregation of Revenue [Line Items]
Revenue	$ 47	$ 580