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Recent Accounting Standards - Summary Impact of ASU 2020-06 on Opening Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | ---
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Deferred tax liabilities (assets) | $ 1,812 |  | $ 8,211
Convertible senior notes, net | 1,661,914 |  | 486,366
Additional paid-in capital | 685,943 |  | 763,051
Retained earnings | $ 466,902 |  | 575,965
Pre-ASU 2020-06 |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Deferred tax liabilities (assets) |  |  | 8,211
Convertible senior notes, net |  |  | 486,366
Additional paid-in capital |  |  | 763,051
Retained earnings |  |  | $ 575,965
ASU 2020-06 |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Deferred tax liabilities (assets) |  | $ (41,693) |
Convertible senior notes, net |  | 148,546 |
Additional paid-in capital |  | (107,810) |
Retained earnings |  | 957 |
As Adjusted |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Deferred tax liabilities (assets) |  | (33,482) |
Convertible senior notes, net |  | 634,912 |
Additional paid-in capital |  | 655,241 |
Retained earnings |  | $ 576,922 |

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