Related-Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 4,640,280	$ 4,519,571	$ 4,283,758
Amount receivable	753,430	699,552
Navarino UK And JSAT Mobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	63,600	65,700	64,400
Cash received	63,600	68,800	$ 61,100
Amount receivable		$ 8,500
Jsat Mobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount receivable	$ 2,500