Quarterly report pursuant to Section 13 or 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)
 3 Months Ended 6 Months Ended
Dec. 03, 2014
USD ($)
Sep. 04, 2014
USD ($)
a
loan
Mar. 31, 2018
USD ($)
loan
Mar. 31, 2018
USD ($)
loan
Sep. 30, 2017
USD ($)
Dec. 01, 2016
USD ($)
Feb. 28, 2015
USD ($)
Feb. 15, 2015
USD ($)
Debt Instrument [Line Items]                
Interest rate term loans     $ 179,761,000 $ 179,761,000 $ 186,476,000      
Fixed Interest Rate Term Loans                
Debt Instrument [Line Items]                
Interest rate term loans $ 125,000,000   $ 99,062,000 $ 99,062,000 $ 99,062,000      
Fixed interest rate (as a percentage) 4.15%              
Quarterly principal payments $ 2,281,250              
Prepayment amount of the fixed term loan $ 8,750,000              
Silver Nip Citrus                
Debt Instrument [Line Items]                
Number of fixed rate term loans | loan   2            
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 2        
Interest rate term loans     $ 27,550,000 $ 27,550,000        
Fixed interest rate (as a percentage)     5.35% 5.35%        
Quarterly principal payments       $ 290,000        
Prepayment amount of the fixed term loan     $ 5,000,000 5,000,000        
Amount of prepayment in excess of total without penalty     203,000          
Premium payment of penalty     22,000          
Amount of prepayment     $ 4,453,000 $ 4,453,000       $ 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 Loan1                
Debt Instrument [Line Items]                
Fixed interest rate (as a percentage)   3.85%            
Silver Nip Citrus | Fixed Rate Term Loan 2                
Debt Instrument [Line Items]                
Fixed interest rate (as a percentage)   3.45%            
Loans Payable | Silver Nip Citrus                
Debt Instrument [Line Items]                
Interest rate term loans             $ 7,000,000  
Limited guaranty and security agreement           $ 8,000,000 $ 7,000,000  
Maximum | Silver Nip Citrus                
Debt Instrument [Line Items]                
Covenant ratio     1.50 1.50        
Minimum | Silver Nip Citrus                
Debt Instrument [Line Items]                
Covenant ratio     1.00 1.00