Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (8,527)	$ (9,737)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	77,760	68,802
Amortization of intangible assets	14,842	15,210
Stock-based compensation expense	20,942	21,227
Loss on disposition of fixed assets	6,689	13,134
Other non-cash adjustments	(4,428)	(5,367)
Increase (decrease) in cash resulting from changes in operating assets and liabilities:
Accounts receivable	55,440	(5,472)
Inventories	(18,118)	(29,252)
Other assets	17,946	(13,595)
Accounts payable	(10,037)	(3,869)
Accrued liabilities	(4,903)	(8,000)
Other liabilities	9,301	3,383
Net cash provided by operating activities	156,907	46,464
Cash flows from investing activities:
Purchase of property, equipment and satellites	(208,722)	(166,115)
Cash paid for patents, licenses and other assets	(20,540)	(21,936)
Proceeds from insurance claims on ViaSat-2 satellite		2,277	$ 188,000	$ 188,000
Net cash used in investing activities	(229,262)	(185,774)
Cash flows from financing activities:
Proceeds from debt borrowings	400,000
Payments of debt borrowings	(402,697)	(11,821)
Payment of debt issuance costs	(3,790)	(2,479)
Proceeds from issuance of common stock under equity plans	9,206	24,377
Purchase of common stock in treasury (immediately retired) related to tax withholdings for stock-based compensation	(401)	(2,328)
Other financing activities	(2,178)	(255)
Net cash provided by financing activities	140	7,494
Effect of exchange rate changes on cash	324	(2)
Net decrease in cash and cash equivalents	(71,891)	(131,818)
Cash and cash equivalents at beginning of period	304,309	261,701	261,701
Cash and cash equivalents at end of period	$ 232,418	$ 129,883	$ 304,309	$ 261,701