Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Narrative (Details)

v3.21.2
Subsequent Events - Narrative (Details)
1 Months Ended 12 Months Ended
Dec. 03, 2021
USD ($)
a
Dec. 02, 2021
$ / shares
Nov. 05, 2021
$ / shares
shares
Oct. 15, 2021
$ / shares
shares
Nov. 10, 2020
$ / shares
shares
Sep. 10, 2020
USD ($)
Nov. 30, 2017
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
$ / shares
Sep. 30, 2019
USD ($)
$ / shares
Subsequent Event [Line Items]                    
Cash dividends declared per common share               $ 1.36 $ 0.36 $ 0.24
Gain on sale of investment in real estate | $               $ 35,898,000 $ 30,424,000 $ 13,166,000
Alico Ranch                    
Subsequent Event [Line Items]                    
Gain on sale of investment in real estate | $           $ 28,500,000        
Restricted Stock                    
Subsequent Event [Line Items]                    
Number of restricted shares awarded | shares         5,885   5,000 5,885    
Weighted average fair value (in dollars per share)         $ 31.20   $ 31.95 $ 31.20    
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Cash dividends declared per common share   $ 0.50                
Subsequent Event [Member] | Discontinued Operations, Disposed of by Sale | Alico Ranch                    
Subsequent Event [Line Items]                    
Acres of land sold | a 1,638                  
Gain on sale of investment in real estate | $ $ 5,675,000                  
Subsequent Event [Member] | 2015 Option Grants                    
Subsequent Event [Line Items]                    
Weighted average fair value (in dollars per share)     $ 35.77 $ 35.77            
Vesting date     Jan. 01, 2023 Jan. 01, 2022            
Subsequent Event [Member] | Restricted Stock | 2015 Option Grants                    
Subsequent Event [Line Items]                    
Number of restricted shares awarded | shares     2,224,000 2,500,000