Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Finished goods and work in process	$ 330,026	$ 292,826
Logs	63,208	58,299
Other raw materials and supplies	40,217	33,732
Inventories	$ 433,451	$ 384,857