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Acquisition - Summary of Purchase Price Allocation of Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	May 30, 2023	Mar. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 1,375,542		$ 158,542
Inmarsat Holdings [Member]
Business Acquisition [Line Items]
Current assets		$ 652,247
Property, equipment and satellites		4,597,898
Identifiable intangible assets		2,680,000
Other assets		388,305
Total assets acquired		8,318,450
Current liabilities		(594,829)
Long-term debt, excluding short-term portion		(3,519,771)
Other long-term liabilities		(2,742,527)
Total liabilities assumed		(6,857,127)
Goodwill		1,217,769
Total consideration transferred		$ 2,679,092