Revenue (Narrative - Performance Obligations) (Details1) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Remaining performance obligation amount	$ 1,916,470	$ 1,558,588
Material Rights [Member]
Remaining performance obligation amount	$ 474,767	$ 448,370
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-04-01
Period of remaining performance obligation, expected timing of satisfaction	6 months
Remaining performance obligation amount	$ 6,876
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	$ 14,985
Remaining performance obligation, expected timing of satisfaction, year	2024
Aerospace [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-04-01
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