Goodwill (Narrative) (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Line Items]
Goodwill		$ 806,643	$ 791,468	$ 772,559
Assumed annual compound growth rate after five years	5.07%
Minimum [Member]
Goodwill [Line Items]
Weighted average cost of capital assumption	10.31%
Maximum [Member]
Goodwill [Line Items]
Weighted average cost of capital assumption	10.33%
Industrial [Member]
Goodwill [Line Items]
Goodwill		$ 351,220	$ 336,045	$ 317,136