Timberland Acquisition (Details) - Western Washington $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) a
Business Acquisition [Line Items]
Acres of land acquired | a	1,648
Assets acquired	$ 5,000
Owned land
Business Acquisition [Line Items]
Assets acquired	783
Timber deed
Business Acquisition [Line Items]
Assets acquired	$ 4,200