Condensed Consolidated Statements of Cash Flows (Unaudited) $ in Thousands	9 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Cash flows from operating activities:
Net income (loss)	$ (290,390)	$ (962,014)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	779,675	598,052
Amortization of intangible assets	243,950	246,918
Stock-based compensation expense	63,468	65,669
(Loss) Gain on extinguishment of debt, net	99,814
Satellite impairment and disposition of fixed assets losses, net	52,934	858,010
Deferred income taxes and other non-cash adjustments	(88,707)	(111,293)
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	(11,158)	(60,618)
Inventories	(2,345)	(53,929)
Other assets	2,027	58,090
Accounts payable	(6,889)	4,172
Accrued liabilities	(67,269)	(80,895)
Other liabilities	(165,366)	(105,952)
Net cash provided by (used in) operating activities	609,744	456,210
Cash flows from investing activities:
Purchase of property, equipment and satellites, and other assets	(782,459)	(1,161,490)
Proceeds from insurance claims on satellites	240,000
Other investing activities	17,577
Payment related to acquisition of a business, net of cash acquired		(342,621)
Proceeds from sale of short-term investments		134,266
Payments to acquire short-term investments		(82,000)
Net cash provided by (used in) investing activities	(524,882)	(1,451,845)
Cash flows from financing activities:
Proceeds from debt borrowings	1,975,000	1,334,683
Payments on debt borrowings	(2,376,734)	(48,457)
Payments of debt issuance costs	(36,284)	(50,390)
Proceeds from issuance of common stock under equity plans	9,657	10,130
Purchase of common stock in treasury (immediately retired) related to tax withholdings for stock-based compensation	(5,208)	(11,220)
Other financing activities	(2,319)	1,339
Net cash provided by (used in) financing activities	(435,888)	1,236,085
Effect of exchange rate changes on cash and cash equivalents	6,482	1,392
Net increase (decrease) in cash and cash equivalents and restricted cash	(344,544)	241,842
Cash and cash equivalents and restricted cash at beginning of period	1,901,033	1,379,386
Cash and cash equivalents at end of period	1,556,489	1,621,228
Non-cash investing and financing activities:
Right-of-use assets obtained in exchange for finance lease liabilities	145,625	1,946
Right-of-use assets obtained in exchange for operating lease liabilities	76,423	15,727
Issuance of common stock in satisfaction of certain accrued compensation liabilities	$ 28,063	31,173
Inmarsat [Member]
Non-cash investing and financing activities:
Issuance of common stock in connection with acquisition		$ 2,123,455