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Acquisitions and Disposals (Schedule of Acquisition of Towers and Related Asset and Liabilities by Assets Class) (Details) - Other Acquisitions [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Business Acquisition [Line Items]
Property and equipment, net	$ 476,720	$ 27,906
Intangible assets, net	391,685	211,131
Operating leases right-of-use assets, net	82,910	25,251
Acquisition related holdbacks	(129)	(4,570)
Long-term lease liabilities	(57,623)	(18,106)
Other liabilities assumed, net	(258,812)	(6,759)
Total acquisitions of towers and related assets and liabilities	$ 634,751	$ 234,853

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