Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Inventory, Net [Abstract]
Finished goods	$ 80,325	$ 91,595	$ 82,734
Growing crops	74,964	72,382	75,761
Raw materials, supplies and other	70,677	74,302	79,453
Inventory, net	$ 225,966	$ 238,279	$ 237,948