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Debt - Summary of Convertible Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Convertible notes $ 1,100,000  
Convertible notes, net of unamortized discount and deferred offering costs 1,080,061 $ 1,079,077 [1]
Total convertible debt, net 1,080,061 1,079,077
Total fair value of fixed-rate convertible debt $ 1,101,981 $ 1,146,204
1.25% Senior Subordinated Convertible Notes Due in May 2027    
Debt Instrument [Line Items]    
Convertible notes stated rate 1.25% 1.25%
Convertible notes $ 600,000 $ 600,000
Unamortized discount net of deferred offering costs (10,465) (10,971)
Convertible notes, net of unamortized discount and deferred offering costs 589,535 589,029
Total fair value of fixed-rate convertible debt $ 604,758 $ 625,122
0.599% Senior Subordinated Convertible Notes Due in August 2024    
Debt Instrument [Line Items]    
Convertible notes stated rate 0.599% 0.599%
Convertible notes $ 495,000 $ 495,000
Unamortized discount net of deferred offering costs (4,474) (4,952)
Convertible notes, net of unamortized discount and deferred offering costs 490,526 490,048
Total fair value of fixed-rate convertible debt $ 497,223 $ 521,082
[1] (1)December 31, 2021 balances were derived from the audited Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, filed with the SEC on February 25, 2022.