Other Operating Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Foreign currency (loss) income	$ 238	$ (394)	$ 283
Gain (loss) on sale or disposal of property plant & equipment	7	(68)	85
Gain (loss) on foreign currency exchange and option contracts	132	3,438	(645)
Gain on foreign currency derivatives	0	0	1,153
Income from sale of unused Internet Protocol addresses	646	0	0
Log trading marketing fees	286	1,222	951
Income from New Zealand Timber settlement	0	420	0
Deferred payments related to prior land sales	0	0	8,658
Costs related to business combination	0	0	(1,316)
Miscellaneous expense, net	(169)	(225)	(83)
Total	$ 1,140	$ 4,393	$ 9,086