Revenue (Narrative - Performance Obligations) (Details1) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Remaining performance obligation amount	$ 2,435,837	$ 2,325,533
Material Rights [Member]
Remaining performance obligation amount	$ 472,957	$ 457,391
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Period of remaining performance obligation, expected timing of satisfaction	9 months
Remaining performance obligation amount	$ 8,865
Remaining performance obligation, expected timing of satisfaction, year	2024
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-10-01
Period of remaining performance obligation, expected timing of satisfaction	1 year
Remaining performance obligation amount	$ 13,291
Remaining performance obligation, expected timing of satisfaction, year	2025
Aerospace [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
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