Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Summary of Mortgage Note Payable and Line of Credit Additional Information (Detail)

v3.10.0.1
Borrowings - Summary of Mortgage Note Payable and Line of Credit Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 30, 2018
USD ($)
Apr. 11, 2018
USD ($)
Oct. 13, 2017
USD ($)
May 31, 2017
USD ($)
debt_instrument
Apr. 30, 2018
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Feb. 28, 2018
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Apr. 30, 2017
USD ($)
Feb. 28, 2017
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Jun. 30, 2018
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debt_instrument
property
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
debt_instrument
property
Jun. 30, 2017
USD ($)
Dec. 31, 2017
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Aug. 08, 2018
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Jul. 12, 2018
Mar. 13, 2018
USD ($)
Dec. 05, 2014
USD ($)
Debt Instrument [Line Items]                                  
Other income                 $ 9,000 $ 0 $ 323,000 $ 185,000          
Rabo AgriFinance, LLC                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment     $ 518,000                            
Stated interest rate (as percent)     4.59%                            
Principal Amortization     25 years                            
New MetLife Facility                                  
Debt Instrument [Line Items]                                  
Principal Outstanding                 132,414,000   132,414,000            
Long-term debt, additional amount available                 $ 16,900,000   $ 16,900,000            
Minimum annualized rate (as percent)                     2.50%            
New MetLife Facility | Minimum                                  
Debt Instrument [Line Items]                                  
Commitment fee (as percent)                 0.10%   0.10%            
Unused fee, percentage                     0.10%            
New MetLife Facility | Maximum                                  
Debt Instrument [Line Items]                                  
Commitment fee (as percent)                 0.20%   0.20%            
Unused fee, percentage                     0.20%            
Farm Credit Notes Payable                                  
Debt Instrument [Line Items]                                  
Principal Outstanding                 $ 61,928,000   $ 61,928,000            
Number of Loans Outstanding | debt_instrument                 15   15            
Reduction in basis points (as percent)                     0.71%            
Farm Credit CFL                                  
Debt Instrument [Line Items]                                  
Principal Outstanding                 $ 24,274,000   $ 24,274,000            
Stated interest rate (as percent)                 4.29%   4.29%            
Number of Loans Outstanding | debt_instrument                 7   7            
Other income         $ 142,000   $ 124,000                    
Reduced stated interest rate (as percent)         15.10%           18.00%            
Reduction in basis points (as percent)         0.58%                        
Farm Credit West                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment   $ 1,473,000                              
Principal Outstanding                 $ 25,332,000   $ 25,332,000            
Stated interest rate (as percent)   4.99%             4.08%   4.08%            
Principal Amortization   20 years 6 months                              
Number of Loans Outstanding | debt_instrument                 5   5            
Other income         $ 11,000 $ 126,000   $ 59,000                  
Reduced stated interest rate (as percent)         36.60% 19.70%                      
Reduction in basis points (as percent)           0.75%                      
CF Farm Credit                                  
Debt Instrument [Line Items]                                  
Principal Outstanding                 $ 1,270,000   $ 1,270,000            
Stated interest rate (as percent)                 4.41%   4.41%            
Number of Loans Outstanding | debt_instrument                 1   1            
Other income                         $ 0        
Reduction in basis points (as percent)         1.61%                        
Farm Credit FL                                  
Debt Instrument [Line Items]                                  
Principal Outstanding                 $ 5,727,000   $ 5,727,000            
Stated interest rate (as percent)                 4.70%   4.70%            
Number of Loans Outstanding | debt_instrument                 1   1            
Other income         $ 27,000               0        
Reduced stated interest rate (as percent)         24.60%                        
Reduction in basis points (as percent)         1.15%                        
NW Farm Credit                                  
Debt Instrument [Line Items]                                  
Principal Outstanding                 $ 5,325,000   $ 5,325,000            
Stated interest rate (as percent)                 4.41%   4.41%            
Number of Loans Outstanding | debt_instrument                 1   1            
Other income           $ 17,000             $ 0        
Reduced stated interest rate (as percent)           22.70%                      
Reduction in basis points (as percent)           1.00%                      
Farmer Mac Bonds Payable                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment                               $ 125,000,000 $ 125,000,000
Principal Outstanding                               $ 85,551,000  
Interest rate (as percent)                               3.15%  
Undrawn Commitment                               $ 37,858,000  
Long-term debt, additional amount available                 $ 0   $ 0            
Stated interest rate (as percent)                 2.60%   2.60%            
Principal Amortization                     3 years            
Number of Loans Outstanding | debt_instrument                 15   15            
Properties pledged as collateral | property                 0   0            
Farmer Mac Bonds Payable, 2017 Issuances                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment                               $ 1,260,000  
Number of Loans Outstanding | debt_instrument                 1   1            
Farmer Mac Bonds Payable, 2017 Issuances | Minimum                                  
Debt Instrument [Line Items]                                  
Stated interest rate (as percent)                               4.47%  
Notes payable to bank | New MetLife Facility                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment                 $ 200,000,000   $ 200,000,000            
Principal Outstanding                 $ 128,914,000   $ 128,914,000            
Interest rate (as percent)                 3.30%   3.30%            
Undrawn Commitment                 $ 63,530,000   $ 63,530,000            
Amortizing principal payments                 7,600,000   7,600,000            
Notes payable to bank | Metlife Term Loans                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment       $ 15,032,000                          
Principal Amortization       28 years 7 months                          
Number of Loans Outstanding | debt_instrument       2                          
Notes payable to bank | Metlife Term Loans | Minimum                                  
Debt Instrument [Line Items]                                  
Stated interest rate (as percent)       3.55%                          
Notes payable to bank | Metlife Term Loans | Maximum                                  
Debt Instrument [Line Items]                                  
Stated interest rate (as percent)       3.85%                          
MetLife Lines of Credit | New MetLife Facility                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment                 75,000,000   75,000,000            
Principal Outstanding                 3,500,000   3,500,000            
Undrawn Commitment                 $ 71,500,000   $ 71,500,000            
Effective interest rate (as percent)                 4.57%   4.57%            
MetLife Lines of Credit | New MetLife Facility | LIBOR                                  
Debt Instrument [Line Items]                                  
Percentage added to LIBOR (as percent)                     2.25%            
Subsequent event | Farm Credit FL                                  
Debt Instrument [Line Items]                                  
Stated interest rate (as percent)                             5.38%    
Subsequent event | Farmer Mac Bonds Payable                                  
Debt Instrument [Line Items]                                  
Aggregate Commitment $ 10,400,000                                
Principal Outstanding                           $ 9,400,000      
Stated interest rate (as percent) 4.45%                                
Principal Amortization 7 years