Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 14,215	$ (41,579)
Effective income tax rate	13.80%	(85.80%)
U.S. federal statutory corporate tax rate	21.00%	21.00%
Excess tax benefits from stock-based awards	$ 12,800	$ 53,800

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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