Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended			24 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 17,101	$ 13,813	$ (66,469)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	330,861	279,733	262,289
Amortization of intangible assets	66,241	62,445	56,324
Stock-based compensation expense	84,879	86,553	79,599
Loss on disposition of fixed assets	39,442	45,622	41,957
Other non-cash adjustments	7,773	(3,154)	(25,330)
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	84,411	(44,807)	(46,108)
Inventories	(42,460)	(58,997)	(36,593)
Other assets	36,431	(3,313)	(2,349)
Accounts payable	(24,363)	28,175	(5,714)
Accrued liabilities	154,898	55,126	71,478
Other liabilities	(27,999)	(24,260)	(1,533)
Net cash provided by operating activities	727,215	436,936	327,551
Cash flows from investing activities:
Purchase of property, equipment and satellites	(827,241)	(693,966)	(636,855)
Cash paid for patents, licenses and other assets	(58,030)	(67,112)	(49,965)
Proceeds from insurance claims on ViaSat-2 satellite		2,277	185,706	$ 188,000
Proceeds from sale of real property			14,034
Payments related to acquisition of business, net of cash acquired			(2,339)
Net cash used in investing activities	(885,271)	(758,801)	(489,419)
Cash flows from financing activities:
Proceeds from debt borrowings	400,000	420,000	1,110,000
Payments of debt borrowings	(420,552)	(59,691)	(732,840)
Payment of debt issuance costs	(5,060)	(2,479)	(9,767)
Proceeds from issuance of common stock under equity plans	19,101	38,410	26,330
Purchase of common stock in treasury (immediately retired) related to tax withholdings for stock-based compensation	(13,676)	(28,802)	(28,826)
Proceeds from common stock issued in private placement, net of issuance costs	174,749
Other financing activities	(4,871)	(2,253)	(10,280)
Net cash provided by financing activities	149,691	365,185	354,617
Effect of exchange rate changes on cash	5	(712)	(2,494)
Net (decrease) increase in cash and cash equivalents	(8,360)	42,608	190,255
Cash and cash equivalents at beginning of fiscal year	304,309	261,701	71,446	71,446
Cash and cash equivalents at end of fiscal year	295,949	304,309	261,701	$ 304,309
Supplemental information:
Cash paid for interest (net of amounts capitalized)	23,526	27,805	35,119
Cash paid for income taxes, net	6,670	10,950	1,758
Non-cash investing and financing activities:
Issuance of common stock in satisfaction of certain accrued employee compensation liabilities	25,406	22,829	32,129
Capital expenditures not paid for	$ 32,616	$ 43,606	$ 40,619