Condensed Consolidated Statements of Cash Flows (Unaudited) $ in Thousands	6 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Cash flows from operating activities:
Net income (loss)	$ (143,483)	$ (842,665)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	522,601	368,572
Amortization of intangible assets	163,269	139,772
Stock-based compensation expense	41,965	43,470
Satellite impairment and disposition of fixed assets losses, net	40,914	835,900
Deferred income taxes and other non-cash adjustments	23,366	(86,749)
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	(46,934)	(44,050)
Inventories	(8,688)	(45,707)
Other assets	(88,851)	(13,277)
Accounts payable	(6,012)	36,175
Accrued liabilities	(33,314)	(7,242)
Other liabilities	(74,548)	(61,557)
Net cash provided by (used in) operating activities	390,285	322,642
Cash flows from investing activities:
Purchase of property, equipment and satellites, and other assets	(529,827)	(740,664)
Proceeds from insurance claims on satellites	197,500
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	(332,327)	(1,001,019)
Cash flows from financing activities:
Proceeds from debt borrowings	1,975,000	1,334,683
Payments on debt borrowings	(383,528)	(27,979)
Payments of debt issuance costs	(28,116)	(47,963)
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	(2,395)	(2,565)
Other financing activities	(1,612)	2,186
Net cash provided by (used in) financing activities	1,569,006	1,268,492
Effect of exchange rate changes on cash and cash equivalents	1,773	(734)
Net increase (decrease) in cash and cash equivalents and restricted cash	1,628,737	589,381
Cash and cash equivalents and restricted cash at beginning of period	1,901,033	1,379,386
Cash and cash equivalents and restricted cash at end of period	3,529,770	1,968,767
Non-cash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	50,885	13,848
Issuance of common stock in satisfaction of certain accrued compensation liabilities	28,063	31,173
Debt issuance costs not paid for	$ 7,458	2,151
Capital expenditures not paid for during the period		6,369
Inmarsat [Member]
Non-cash investing and financing activities:
Issuance of common stock in connection with acquisition		$ 2,123,455