Revenue (Narrative - Performance Obligations) (Details1) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Remaining performance obligation amount	$ 2,120,096	$ 1,558,588
Material Rights [Member]
Remaining performance obligation amount	$ 481,417	$ 448,370
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01
Period of remaining performance obligation, expected timing of satisfaction	6 months
Remaining performance obligation amount	$ 4,594
Remaining performance obligation, expected timing of satisfaction, year	2023
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01
Period of remaining performance obligation, expected timing of satisfaction	1 year
Remaining performance obligation amount	$ 15,510
Remaining performance obligation, expected timing of satisfaction, year	2024
Aerospace [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01
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