Condensed Consolidated Statements of Cash Flows (Unaudited) $ in Thousands	6 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Cash flows from operating activities:
Net income (loss)	$ (842,665)	$ (68,595)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	368,572	204,599
Amortization of intangible assets	139,772	43,888
Stock-based compensation expense	43,470	43,806
Satellite impairment and disposition of fixed assets losses, net	835,900	25,406
Deferred income taxes and other non-cash adjustments	(86,749)	65,250
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	(44,050)	(42,625)
Inventories	(45,707)	(40,190)
Other assets	(13,277)	8,382
Accounts payable	36,175	13,222
Accrued liabilities	(7,242)	3,299
Other liabilities	(61,557)	(28,310)
Net cash provided by (used in) operating activities	322,642	228,132
Cash flows from investing activities:
Purchase of property, equipment and satellites, and other assets	(740,664)	(554,813)
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	(52,000)
Net cash provided by (used in) investing activities	(1,001,019)	(554,813)
Cash flows from financing activities:
Proceeds from debt borrowings	1,334,683	275,000
Payments on debt borrowings	(27,979)	(82,348)
Payments of debt issuance costs	(47,963)	(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	(2,565)	(832)
Repurchase of shares by majority-owned subsidiary		(30,000)
Other financing activities	2,186	(1,540)
Net cash provided by (used in) financing activities	1,268,492	168,395
Effect of exchange rate changes on cash	(734)	(3,001)
Net increase (decrease) in cash and cash equivalents and restricted cash	589,381	(161,287)
Cash and cash equivalents and restricted cash at beginning of period	1,379,386	310,459
Cash and cash equivalents and restricted cash at end of period	1,968,767	149,172
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	13,848	3,499
Capital expenditures not paid for during the period	6,369	$ 45,688
Debt issuance costs not paid for	2,151
Inmarsat [Member]
Non-cash investing and financing activities:
Issuance of common stock in connection with acquisition	$ 2,123,455