Related-Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Mar. 31, 2026
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 1,179,996	$ 1,140,893	$ 2,336,539	$ 2,311,947
Amount receivable	735,410		735,410		$ 753,430
Navarino UK And JSAT Mobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	7,000	15,500	14,200	32,400
Cash received	7,300	$ 17,100	14,400	$ 32,400
Amount receivable	$ 2,300		$ 2,300		$ 2,500

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details