Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents, Short-Term and Long-Term Investments - Summary of Cash, Cash Equivalents, Short-Term and Long-Term Investments by Significant Investment Category (Detail)

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Cash, Cash Equivalents, Short-Term and Long-Term Investments - Summary of Cash, Cash Equivalents, Short-Term and Long-Term Investments by Significant Investment Category (Detail) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents $ 1,020,458,000 $ 1,189,910,000
Short-Term Investments 88,564,000 72,595,000
Long-Term Investments 83,911,000 70,617,000
Adjusted Cost 1,186,542,000 1,324,587,000
Fair Value 1,192,933,000 1,333,122,000
Level 1 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents 17,643,000 206,259,000
Fair Value 38,338,000 224,621,000
Short-Term Investments 12,833,000 9,827,000
Long-Term Investments 7,862,000 8,535,000
Adjusted Cost 31,947 216,086,000
Level 2 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents 13,183,000 11,373,000
Fair Value 164,963,000 136,223,000
Short-Term Investments 75,731,000 62,768,000
Long-Term Investments 76,049,000 62,082,000
Adjusted Cost 164,963,000 136,223,000
Money market funds [Member] | Level 1 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents 12,646,000 176,317,000
Fair Value 12,646,000 176,317,000
Adjusted Cost 12,646 176,317,000
U.S. Treasury Securities [Member] | Level 1 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents 4,997,000 29,942,000
Fair Value 19,301,000 39,769,000
Short-Term Investments 12,833,000 9,827,000
Long-Term Investments 1,471,000  
Adjusted Cost 19,301 39,769,000
Mutual Funds [Member] | Level 1 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Fair Value 6,391,000 8,535,000
Long-Term Investments 6,391,000 8,535,000
Corporate Notes and Bonds [Member] | Level 2 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents 13,183,000 9,374,000
Fair Value 121,604,000 97,795,000
Short-Term Investments 57,864,000 50,949,000
Long-Term Investments 50,557,000 37,472,000
Adjusted Cost 121,604,000 97,795,000
Asset-backed Securities [Member] | Level 2 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Fair Value 19,853,000 11,159,000
Short-Term Investments 1,199,000  
Long-Term Investments 18,654,000 11,159,000
Adjusted Cost 19,853,000 11,159,000
Cash [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents 989,632,000 972,278,000
Fair Value 989,632,000 972,278,000
U.S. Agency securities [Member] | Level 2 [Member]    
Cash Cash Equivalents Short Term And Long Term Investments [Line Items]    
Cash and Cash Equivalents   1,999,000
Fair Value 23,506,000 27,269,000
Short-Term Investments 16,668,000 11,819,000
Long-Term Investments 6,838,000 13,451,000
Adjusted Cost $ 23,506,000 $ 27,269,000