Revenue (Narrative - Performance Obligations) (Details1) - USD ($) $ in Thousands	Mar. 31, 2025	Sep. 30, 2024
Remaining performance obligation amount	$ 3,105,657	$ 2,932,793
Material Rights [Member]
Remaining performance obligation amount	$ 511,464
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-04-01
Period of remaining performance obligation, expected timing of satisfaction	6 months
Remaining performance obligation amount	$ 8,587
Remaining performance obligation, expected timing of satisfaction, year	2025
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-10-01
Period of remaining performance obligation, expected timing of satisfaction	1 year
Remaining performance obligation amount	$ 17,013
Remaining performance obligation, expected timing of satisfaction, year	2026
Aerospace [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-04-01
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: 2025-10-01
Period of remaining performance obligation, expected timing of satisfaction	40 years