Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail)
$ in Thousands
 3 Months Ended 165 Months Ended
Jun. 30, 2017
USD ($)
a
well
Mar. 31, 2017
USD ($)
a
Mar. 31, 2016
USD ($)
a
Jan. 09, 2031
USD ($)
Sep. 30, 2015
a
Loss Contingencies [Line Items]          
Area of real estate property (in acres) | a   54,340 23,003    
Estimated cost   $ 468 $ 1,866    
Rental revenue   $ 5,748 $ 3,680    
California          
Loss Contingencies [Line Items]          
Area of real estate property (in acres) | a   6,713 3,576   854
Expended or accrued for capital improvements   $ 8,200      
Rental revenue   $ 2,857 $ 2,140    
California | Forecast          
Loss Contingencies [Line Items]          
Removal area of old grape vineyards (in acres) | a 274        
Number of new drilling wells | well 3        
Area of new almond trees (amount over) (in acres) | a 800        
Estimated cost $ 8,300        
Rental revenue       $ 5,100