| Summary of Cash, Cash Equivalents, Short-Term and Long-Term Investments by Significant Investment Category |
The following tables show the Company’s cash, cash equivalents, short-term and long-term investments by significant investment category:
|
|
|
As of March 31, 2021
|
|
|
(in thousands)
|
|
Adjusted Cost
|
|
|
Fair Value
|
|
|
Cash and Cash Equivalents
|
|
|
Short-Term Investments
|
|
|
Long-Term Investments
|
|
|
Cash
|
|
$
|
866,621
|
|
|
$
|
866,621
|
|
|
$
|
866,621
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
Level 1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Money market funds
|
|
|
417,919
|
|
|
|
417,919
|
|
|
|
417,919
|
|
|
|
—
|
|
|
|
—
|
|
|
U.S. Treasury securities
|
|
|
22,551
|
|
|
|
22,551
|
|
|
|
—
|
|
|
|
8,362
|
|
|
|
14,189
|
|
|
Total level 1
|
|
|
440,470
|
|
|
|
440,470
|
|
|
|
417,919
|
|
|
|
8,362
|
|
|
|
14,189
|
|
|
Level 2
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Corporate notes and bonds
|
|
|
138,507
|
|
|
|
138,507
|
|
|
|
—
|
|
|
|
93,422
|
|
|
|
45,085
|
|
|
Asset-backed securities
|
|
|
25,831
|
|
|
|
25,831
|
|
|
|
—
|
|
|
|
2,257
|
|
|
|
23,574
|
|
|
U.S. Agency securities
|
|
|
1,987
|
|
|
|
1,987
|
|
|
|
—
|
|
|
|
1,987
|
|
|
|
—
|
|
|
Mutual funds
|
|
|
41,531
|
|
|
|
41,531
|
|
|
|
—
|
|
|
|
—
|
|
|
|
41,531
|
|
|
Total level 2
|
|
|
207,856
|
|
|
|
207,856
|
|
|
|
—
|
|
|
|
97,666
|
|
|
|
110,190
|
|
|
TOTAL
|
|
$
|
1,514,947
|
|
|
$
|
1,514,947
|
|
|
$
|
1,284,540
|
|
|
$
|
106,028
|
|
|
$
|
124,379
|
|
|
|
|
As of December 31, 2020
|
|
|
(in thousands)
|
|
Adjusted Cost
|
|
|
Fair Value
|
|
|
Cash and Cash Equivalents
|
|
|
Short-Term Investments
|
|
|
Long-Term Investments
|
|
|
Cash
|
|
$
|
946,961
|
|
|
$
|
946,961
|
|
|
$
|
946,961
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
Level 1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Money market funds
|
|
|
423,865
|
|
|
|
423,865
|
|
|
|
423,865
|
|
|
|
—
|
|
|
|
—
|
|
|
U.S. Treasury securities
|
|
|
21,146
|
|
|
|
21,146
|
|
|
|
—
|
|
|
|
8,067
|
|
|
|
13,079
|
|
|
Total level 1
|
|
|
445,011
|
|
|
|
445,011
|
|
|
|
423,865
|
|
|
|
8,067
|
|
|
|
13,079
|
|
|
Level 2
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Corporate notes and bonds
|
|
|
117,253
|
|
|
|
117,253
|
|
|
|
—
|
|
|
|
83,521
|
|
|
|
33,732
|
|
|
Asset-backed securities
|
|
|
28,253
|
|
|
|
28,253
|
|
|
|
—
|
|
|
|
5,498
|
|
|
|
22,755
|
|
|
U.S. Agency securities
|
|
|
3,681
|
|
|
|
3,681
|
|
|
|
—
|
|
|
|
3,681
|
|
|
|
—
|
|
|
Mutual funds
|
|
|
38,846
|
|
|
|
38,846
|
|
|
|
—
|
|
|
|
—
|
|
|
|
38,846
|
|
|
Total level 2
|
|
|
188,033
|
|
|
|
188,033
|
|
|
|
—
|
|
|
|
92,700
|
|
|
|
95,333
|
|
|
TOTAL
|
|
$
|
1,580,005
|
|
|
$
|
1,580,005
|
|
|
$
|
1,370,826
|
|
|
$
|
100,767
|
|
|
$
|
108,412
|
|
|