Income Taxes - Income Tax Expense (Benefit) Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Tax expense (benefit) at the federal statutory rate	$ 4,168	$ (982)
State income tax expense (benefit) (net of federal benefit)	417	(98)
Tax effect of timber at the federal statutory rate of 23.8%	(206)	0
Decrease in valuation allowance	(354)	(14)
Other	(781)	21
Total income tax expense (benefit)	$ 3,244	$ (1,073)
Timber statutory federal rate	23.80%