Income Taxes - Components of Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 217,883	$ 197,486
Tax credit carryforwards	248,425	220,060
Operating lease liabilities	78,114
Deferred revenue	24,840	24,421
Other	62,691	57,246
Valuation allowance	(42,621)	(33,499)
Total deferred tax assets	589,332	465,714
Deferred tax liabilities:
Intangible assets	(71,116)	(72,776)
Property, equipment and satellites	(142,049)	(113,188)
Operating lease assets	(73,446)
Other	(27,374)	(21,160)
Total deferred tax liabilities	(313,985)	(207,124)
Net deferred tax assets	$ 275,347	$ 258,590