Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Lines of Credit - Silver Nip Citrus Debt (Details)

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Long-Term Debt and Lines of Credit - Silver Nip Citrus Debt (Details)
 12 Months Ended
Apr. 28, 2015
USD ($)
Dec. 03, 2014
USD ($)
Sep. 04, 2014
USD ($)
a
loan
Sep. 30, 2016
USD ($)
a
loan
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Feb. 15, 2015
USD ($)
Dec. 02, 2014
USD ($)
Debt Instrument [Line Items]                
Interest rate term loans       $ 197,219,000 $ 205,481,000      
Loss on extinguishment of debt       0 1,051,000 $ 0    
Deferred financing costs       2,000,000        
Rabo Agrifinance, Inc. variable rate term loan. The loan was refinanced on December 3, 2014.                
Debt Instrument [Line Items]                
Revolving line of credit               $ 60,000,000
Deferred financing costs       339,000        
Fixed Interest Rate Term Loans                
Debt Instrument [Line Items]                
Interest rate term loans   $ 125,000,000   $ 105,312,000 $ 111,563,000      
Fixed interest rate   4.15%   4.15%        
Quarterly principal payments   $ 2,281,250            
Prepayment amount of the fixed term loan (up to)   $ 8,750,000   $ 0        
Silver Nip Citrus                
Debt Instrument [Line Items]                
Number of fixed rate term loans | loan     2          
Area of land acquired (in acres) | a       7,400        
Minimum current ratio       1.5        
Silver Nip Citrus | Rabo Agrifinance, Inc. variable rate term loan. The loan was refinanced on December 3, 2014.                
Debt Instrument [Line Items]                
Revolving line of credit $ 6,000,000              
Loss on extinguishment of debt $ 87,000              
Silver Nip Citrus | Citrus Grove                
Debt Instrument [Line Items]                
Area of land acquired (in acres) | a     1,500          
Silver Nip Citrus | Fixed Interest Rate Term Loans                
Debt Instrument [Line Items]                
Number of fixed rate term loans | loan       2        
Interest rate term loans       $ 27,550,000        
Fixed interest rate       5.35%        
Quarterly principal payments       $ 290,000        
Prepayment amount of the fixed term loan (up to)       5,000,000        
Amount of prepayment             $ 750,000  
Silver Nip Citrus | Fixed Interest Rate Term Loans | Prudential                
Debt Instrument [Line Items]                
Interest rate term loans     $ 5,500,000          
Quarterly principal payments     $ 55,000          
Silver Nip Citrus | Fixed Rate Term Loan at 3.85%                
Debt Instrument [Line Items]                
Fixed interest rate     3.85%          
Silver Nip Citrus | Fixed Rate Term Loan at 3.45%                
Debt Instrument [Line Items]                
Fixed interest rate     3.45%          
Silver Nip Citrus | Silver Nip Citrus Debt                
Debt Instrument [Line Items]                
Deferred financing costs       $ 351,000