Stock-Based Compensation - ESPP - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions		3 Months Ended
Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019
Stock-Based Compensation
Stock-based compensation expense		$ 22,965	$ 15,869
ESPP
Stock-Based Compensation
Stock-based compensation expense		$ 7,800	$ 4,000
Number of additional shares authorized for grant	0.5

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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