Income Taxes - Components of Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 187,900	$ 217,883
Tax credit carryforwards	272,126	248,425
Operating lease liabilities	88,259	78,114
Deferred revenue	21,345	24,840
Other	82,222	62,691
Valuation allowance	(47,076)	(42,621)
Total deferred tax assets	604,776	589,332
Deferred tax liabilities:
Intangible assets	(71,335)	(71,116)
Property, equipment and satellites	(142,899)	(142,049)
Operating lease assets	(83,065)	(73,446)
Other	(34,208)	(27,374)
Total deferred tax liabilities	(331,507)	(313,985)
Net deferred tax assets	$ 273,269	$ 275,347