Hurricane Michael (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loss contingency
Loss on disposal of assets	$ (67)	$ 5,223	$ 887
Insurance proceeds	5,314	7,199
Loss from hurricane damage	2,704	8,628
Proceeds from settlement received	12,071
Hurricane Michael.
Loss contingency
Proceeds from business interruption insurance	1,300
Loss on disposal of assets		7,300
Insurance proceeds	5,300	7,200
Insurance settlements receivable		6,700
Timber loss expense		300
Loss from hurricane damage	2,700	8,600
Hurricane expense, excluding timber loss	$ 2,700	$ 1,000