Annual report [Section 13 and 15(d), not S-K Item 405]

Description of Business and Basis of Presentation - (Details)

v3.25.3
Description of Business and Basis of Presentation - (Details)
$ / shares in Units, $ in Thousands
 2 Months Ended 12 Months Ended
Jan. 06, 2025
numberOfEmployee
Jan. 03, 2025
numberOfEmployee
May 30, 2025
numberOfEmployee
Sep. 30, 2025
USD ($)
a
classification
boardMember
$ / shares
Sep. 30, 2024
USD ($)
$ / shares
Mar. 25, 2025
USD ($)
$ / shares
Property, Plant and Equipment [Line Items]            
Area of land sold | a       49,537    
Area of mineral rights | a       44,700    
Number of operating segments | classification       2    
Number of board members | boardMember       5    
Restructuring and related cost, expected number of positions eliminated | numberOfEmployee 135 172 37      
Net income (loss) attributable to subsidiary       $ (174) $ (618)  
Net income (loss) attributable to parent       $ (147,334) $ 6,973  
Share repurchase program, authorized, amount           $ 50,000
Common stock, par value per share (in dollars per share) | $ / shares       $ 1.00 $ 1.00 $ 1.00
Citree            
Property, Plant and Equipment [Line Items]            
Net income (loss) attributable to subsidiary       $ (356) $ (1,261)  
Net income (loss) attributable to parent       $ (182) $ (643)