| Unrealized Gain (Loss) on Investments | 
 The amortized cost and fair value of marketable securities as of the dates indicated below were as follows: 
 | 
 | 
 | 
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 | 
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 | 
 | 
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 | 
 | 
 
| As of December 31, 2022 (In thousands) | 
Amortized Cost | 
 | 
Gross Unrealized Gains | 
 | 
Gross Unrealized Losses | 
 | 
Fair Value | 
 
| Corporate debt securities | 
$ | 
492,548  | 
 | 
 | 
$ | 
133  | 
 | 
 | 
$ | 
(8,388) | 
 | 
 | 
$ | 
484,293  | 
 | 
 
| Money market funds and other | 
839,867  | 
 | 
 | 
—  | 
 | 
 | 
—  | 
 | 
 | 
839,867  | 
 | 
 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
| Municipal securities | 
38,909  | 
 | 
 | 
—  | 
 | 
 | 
(1,116) | 
 | 
 | 
37,793  | 
 | 
 
| Sovereign securities | 
6,034  | 
 | 
 | 
—  | 
 | 
 | 
(30) | 
 | 
 | 
6,004  | 
 | 
 
| U.S. Government agency securities | 
88,752  | 
 | 
 | 
8  | 
 | 
 | 
(1,238) | 
 | 
 | 
87,522  | 
 | 
 
| U.S. Treasury securities | 
451,374  | 
 | 
 | 
43  | 
 | 
 | 
(11,014) | 
 | 
 | 
440,403  | 
 | 
 
Equity securities(1)
  | 
3,211  | 
 | 
 | 
16,113  | 
 | 
 | 
—  | 
 | 
 | 
19,324  | 
 | 
 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
| Subtotal | 
1,920,695  | 
 | 
 | 
16,297  | 
 | 
 | 
(21,786) | 
 | 
 | 
1,915,206  | 
 | 
 
Add: Time deposits(2)
  | 
341,003  | 
 | 
 | 
—  | 
 | 
 | 
—  | 
 | 
 | 
341,003  | 
 | 
 
| Less: Cash equivalents | 
961,336  | 
 | 
 | 
—  | 
 | 
 | 
—  | 
 | 
 | 
961,336  | 
 | 
 
| Marketable securities | 
$ | 
1,300,362  | 
 | 
 | 
$ | 
16,297  | 
 | 
 | 
$ | 
(21,786) | 
 | 
 | 
$ | 
1,294,873  | 
 | 
 
 | 
 | 
 | 
 | 
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 | 
 
  
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| As of June 30, 2022 (In thousands) | 
Amortized Cost | 
 | 
Gross Unrealized Gains | 
 | 
Gross Unrealized Losses | 
 | 
Fair Value | 
 
| Corporate debt securities | 
$ | 
481,881  | 
 | 
 | 
$ | 
3  | 
 | 
 | 
$ | 
(8,915) | 
 | 
 | 
$ | 
472,969  | 
 | 
 
| Money market funds and other | 
948,027  | 
 | 
 | 
—  | 
 | 
 | 
—  | 
 | 
 | 
948,027  | 
 | 
 
| Municipal securities | 
61,973  | 
 | 
 | 
—  | 
 | 
 | 
(1,249) | 
 | 
 | 
60,724  | 
 | 
 
| Sovereign securities | 
6,041  | 
 | 
 | 
2  | 
 | 
 | 
(53) | 
 | 
 | 
5,990  | 
 | 
 
| U.S. Government agency securities | 
92,273  | 
 | 
 | 
26  | 
 | 
 | 
(1,183) | 
 | 
 | 
91,116  | 
 | 
 
| U.S. Treasury securities | 
378,871  | 
 | 
 | 
18  | 
 | 
 | 
(8,378) | 
 | 
 | 
370,511  | 
 | 
 
Equity securities(1)
  | 
3,211  | 
 | 
 | 
7,824  | 
 | 
 | 
—  | 
 | 
 | 
11,035  | 
 | 
 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
| Subtotal | 
1,972,277  | 
 | 
 | 
7,873  | 
 | 
 | 
(19,778) | 
 | 
 | 
1,960,372  | 
 | 
 
Add: Time deposits(2)
  | 
274,873  | 
 | 
 | 
—  | 
 | 
 | 
—  | 
 | 
 | 
274,873  | 
 | 
 
| Less: Cash equivalents | 
1,112,146  | 
 | 
 | 
—  | 
 | 
 | 
(1) | 
 | 
 | 
1,112,145  | 
 | 
 
| Marketable securities | 
$ | 
1,135,004  | 
 | 
 | 
$ | 
7,873  | 
 | 
 | 
$ | 
(19,777) | 
 | 
 | 
$ | 
1,123,100  | 
 | 
 
  
________________ 
(1) Unrealized gains on equity securities included in our portfolio include the initial fair value adjustment recorded upon a security becoming marketable. 
(2) Time deposits excluded from fair value measurements. 
 | 
| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value | 
The following table summarizes the fair value and gross unrealized losses of our investments that were in an unrealized loss position as of the dates indicated below.
 | 
 | 
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 | 
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 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
| As of December 31, 2022 | 
Less than 12 Months | 
 | 
12 Months or Greater | 
 | 
Total | 
 
| (In thousands) | 
Fair Value | 
 | 
Gross  Unrealized  Losses | 
 | 
Fair Value | 
 | 
Gross  Unrealized  Losses | 
 | 
Fair Value | 
 | 
Gross  Unrealized  Losses | 
 
| Corporate debt securities | 
$ | 
226,806  | 
 | 
 | 
$ | 
(3,852) | 
 | 
 | 
$ | 
216,074  | 
 | 
 | 
$ | 
(4,536) | 
 | 
 | 
$ | 
442,880  | 
 | 
 | 
$ | 
(8,388) | 
 | 
 
| Municipal securities | 
6,879  | 
 | 
 | 
(183) | 
 | 
 | 
30,914  | 
 | 
 | 
(933) | 
 | 
 | 
37,793  | 
 | 
 | 
(1,116) | 
 | 
 
| Sovereign securities | 
1,006  | 
 | 
 | 
(3) | 
 | 
 | 
1,974  | 
 | 
 | 
(27) | 
 | 
 | 
2,980  | 
 | 
 | 
(30) | 
 | 
 
| U.S. Government agency securities | 
30,398  | 
 | 
 | 
(140) | 
 | 
 | 
36,268  | 
 | 
 | 
(1,098) | 
 | 
 | 
66,666  | 
 | 
 | 
(1,238) | 
 | 
 
| U.S. Treasury securities | 
216,402  | 
 | 
 | 
(5,024) | 
 | 
 | 
197,099  | 
 | 
 | 
(5,990) | 
 | 
 | 
413,501  | 
 | 
 | 
(11,014) | 
 | 
 
| Total | 
$ | 
481,491  | 
 | 
 | 
$ | 
(9,202) | 
 | 
 | 
$ | 
482,329  | 
 | 
 | 
$ | 
(12,584) | 
 | 
 | 
$ | 
963,820  | 
 | 
 | 
$ | 
(21,786) | 
 | 
 
  
  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
| As of June 30, 2022 (In thousands) | 
Fair Value(1)
  | 
 | 
 Gross  
Unrealized  
Losses(1)
 
 | 
 
| Corporate debt securities | 
$ | 
458,699  | 
 | 
 | 
$ | 
(8,915) | 
 | 
 
| Municipal securities | 
58,722  | 
 | 
 | 
(1,249) | 
 | 
 
| Sovereign securities | 
2,963  | 
 | 
 | 
(53) | 
 | 
 
| U.S. Government agency securities | 
60,285  | 
 | 
 | 
(1,183) | 
 | 
 
| U.S. Treasury securities | 
336,819  | 
 | 
 | 
(8,378) | 
 | 
 
| Total | 
$ | 
917,488  | 
 | 
 | 
$ | 
(19,778) | 
 | 
 
  
________________ 
(1) As of June 30, 2022, our investments that were in a continuous loss position of 12 months or more, as well as the unrealized losses on those investments, were immaterial. 
 | 
| Schedule of Contractual Maturities of Securities | 
 The contractual maturities of securities classified as available-for-sale, regardless of their classification on our Condensed Consolidated Balance Sheets, as of the date indicated below were as follows: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
| As of December 31, 2022 (In thousands) | 
Amortized Cost | 
 | 
Fair Value | 
 
| Due within one year | 
$ | 
810,100  | 
 | 
 | 
$ | 
816,047  | 
 | 
 
| Due after one year through three years | 
490,262  | 
 | 
 | 
478,826  | 
 | 
 
| Total | 
$ | 
1,300,362  | 
 | 
 | 
$ | 
1,294,873  | 
 | 
 
  
 |