Income Taxes - Schedule of Changes in Balance of Gross Unrecognized Tax Benefits (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020		Mar. 31, 2019
Income Tax Disclosure [Abstract]
Reduction in unrecognized tax benefits	$ 5,981	[1]	$ 4,309

[1] Recorded as an income tax benefit along with an equal and offsetting amount recorded in other losses, net, to recognize a reduction in the indemnification asset. During the three months ended March 31, 2019 a $4,309 income tax benefit was recorded along with an equal and offsetting amount in other losses, net.