Long-Term Debt (Schedule of Outstanding Debt) (Details) (USD $)	9 Months Ended	12 Months Ended
	Jun. 30, 2012 A	Sep. 30, 2011
Debt Instrument [Line Items]
Principal balance outstanding	$ 40,717,000	$ 57,158,000
Remaining available credit	60,000,000	46,021,000
Minimum current ratio	1.5	2
Revolving Line of Credit [Member] [Member]
Debt Instrument [Line Items]
Principal balance outstanding		13,979,000
Remaining available credit	60,000,000	46,021,000
Effective interest rate	2.49%	2.72%
Scheduled maturity date	Oct. 01, 2020	Oct. 01, 2020
Acres collateralized	43,991
Term Note [Member]
Debt Instrument [Line Items]
Principal balance outstanding	38,500,000	40,000,000
Remaining available credit
Effective interest rate	2.74%	2.72%
Scheduled maturity date	Oct. 01, 2020	Oct. 01, 2020
Acres collateralized	12,280
Term Note [Member] | Producing Citrus Groves [Member]
Debt Instrument [Line Items]
Acres collateralized	8,600
Mortgage Note Payable [Member]
Debt Instrument [Line Items]
Principal balance outstanding	2,217,000	3,167,000
Remaining available credit
Effective interest rate	6.68%	6.68%
Scheduled maturity date	Mar. 01, 2014	Mar. 01, 2014
All Other Debt [Member]
Debt Instrument [Line Items]
Principal balance outstanding		12,000
Remaining available credit
Revolving Line of Credit and Term Note [Member]
Debt Instrument [Line Items]
Amount of credit facility	$ 100,000,000