Property, Buildings and Equipment, Net (Schedule of Property, Buildings and Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, net	$ 130,906	$ 122,834
Depreciable Assets [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	118,771	108,861
Less accumulated depreciation and depletion	68,314	65,220
Property, buildings and equipment, net	50,457	43,641
Breeding herd [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	12,878	10,062
Buildings [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	11,234	10,975
Citrus trees [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	33,667	33,164
Sugarcane [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	15,834	12,617
Equipment and Other Facilities [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	45,158	42,043
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property, buildings and equipment	$ 80,449	$ 79,193