Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Inventory, Net [Abstract]
Finished goods	$ 76,711	$ 65,084	$ 69,244
Growing crops	78,455	75,412	73,068
Raw materials, supplies and other	62,112	56,811	66,619
Inventory, net	$ 217,278	$ 197,307	$ 208,931