Related-Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 1,140,893	$ 1,122,262	$ 2,311,947	$ 2,248,722
Amount receivable	682,820		682,820		$ 699,552
Navarino UK And JSAT Mobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	15,500	17,000	32,400	33,800
Cash received	17,100	$ 16,900	32,400	$ 36,200
Amount receivable	$ 8,500		$ 8,500		$ 8,500