Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Inventory, Net [Abstract]
Finished goods	$ 79,718	$ 91,595	$ 80,172
Growing crops	72,643	72,382	69,247
Raw materials, supplies and other	74,806	74,302	76,397
Inventory, net	$ 227,167	$ 238,279	$ 225,816