Condensed Consolidated Statements of Cash Flows (Unaudited) $ in Thousands	9 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Cash flows from operating activities:
Net income (loss)	$ (962,014)	$ (109,020)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	598,052	307,632
Amortization of intangible assets	246,918	65,848
Stock-based compensation expense	65,669	64,941
Satellite impairment and disposition of fixed assets losses, net	858,010	36,337
Deferred income taxes and other non-cash adjustments	(111,293)	81,847
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	(60,618)	(76,208)
Inventories	(53,929)	(64,474)
Other assets	58,090	8,680
Accounts payable	4,172	55,421
Accrued liabilities	(80,895)	(19,374)
Other liabilities	(105,952)	(34,018)
Net cash provided by (used in) operating activities	456,210	317,612
Cash flows from investing activities:
Purchase of property, equipment and satellites, and other assets	(1,161,490)	(850,747)
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	(1,451,845)	(850,747)
Cash flows from financing activities:
Proceeds from debt borrowings	1,334,683	540,000
Payments on debt borrowings	(48,457)	(93,853)
Payments of debt issuance costs	(50,390)	(1,511)
Proceeds from issuance of common stock under equity plans	10,130	9,626
Purchase of common stock in treasury (immediately retired) related to tax withholdings for stock-based compensation	(11,220)	(15,921)
Repurchase of shares by majority-owned subsidiary		(30,000)
Other financing activities	1,339	(2,374)
Net cash provided by (used in) financing activities	1,236,085	405,967
Effect of exchange rate changes on cash	1,392	(1,161)
Net increase (decrease) in cash and cash equivalents and restricted cash	241,842	(128,329)
Cash and cash equivalents and restricted cash at beginning of period	1,379,386	310,459
Cash and cash equivalents at end of period	1,621,228	182,130
Non-cash investing and financing activities:
Issuance of common stock in satisfaction of certain accrued compensation liabilities	31,173	27,619
Right-of-use assets obtained in exchange for operating lease liabilities	15,727	6,923
Capital expenditures not paid for during the period		$ 78,642
Inmarsat [Member]
Non-cash investing and financing activities:
Issuance of common stock in connection with acquisition	$ 2,123,455