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Stock-Based Compensation - ESPP - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions		3 Months Ended		6 Months Ended
	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stock-Based Compensation
Stock-based compensation expense		$ 23,934	$ 21,057	$ 46,899	$ 36,926
ESPP
Stock-Based Compensation
Stock-based compensation expense		$ 6,300	$ 6,400	$ 14,100	$ 10,400
Number of additional shares authorized for grant	0.5

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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