v3.26.1
Revenue (Narrative - Performance Obligations) (Details1) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation amount $ 4,117,859 $ 3,195,156
Material Rights [Member]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation amount $ 486,461  
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-07-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Period of remaining performance obligation, expected timing of satisfaction 3 months  
Remaining performance obligation amount $ 3,583  
Remaining performance obligation, expected timing of satisfaction, year 2026  
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-10-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Period of remaining performance obligation, expected timing of satisfaction 1 year  
Remaining performance obligation amount $ 16,757  
Remaining performance obligation, expected timing of satisfaction, year 2027  
Aerospace [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-07-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Period of remaining performance obligation, expected timing of satisfaction 2 years  
Maximum [Member] | Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-10-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Period of remaining performance obligation, expected timing of satisfaction 40 years