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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2021

Debt Securities, Available-for-sale, Sale [Abstract]

Cash equivalents and marketable securities classified as available-for-sale

Total cash, cash equivalents and marketable securities are summarized as follows:

						As of September 30, 2021
(In thousands)						Fair Value						Amortized  Cost						Gross  Unrealized  Gains						Gross  Unrealized  Losses						Weighted  Rate of  Return
Money market funds						$	84,158					$	84,158					$	—					$	—					0.03		%
U.S. Government bonds and notes						22,052						22,066						2						(16)						0.27		%
Corporate notes, bonds and commercial paper						245,805						245,934						23						(152)						0.20		%
Total cash equivalents and marketable securities						352,015						352,158						25						(168)
Cash						67,713						67,713						—						—
Total cash, cash equivalents and marketable securities						$	419,728					$	419,871					$	25					$	(168)

						As of December 31, 2020
(In thousands)						Fair Value						Amortized  Cost						Gross  Unrealized  Gains						Gross  Unrealized  Losses						Weighted  Rate of  Return
Money market funds						$	18,162					$	18,162					$	—					$	—					0.01		%
U.S. Government bonds and notes						169,633						169,670						3						(40)						0.12		%
Corporate notes, bonds and commercial paper						253,391						253,412						61						(82)						0.20		%
Total cash equivalents and marketable securities						441,186						441,244						64						(122)
Cash						61,463						61,463						—						—
Total cash, cash equivalents and marketable securities						$	502,649					$	502,707					$	64					$	(122)

Available-for-sale securities reported at fair value

Available-for-sale securities are reported at fair value on the balance sheets and classified along with cash as follows:

						As of
(In thousands)						September 30, 2021						December 31, 2020
Cash equivalents						$	84,158					$	67,504
Short-term marketable securities						267,857						373,682
Total cash equivalents and marketable securities						352,015						441,186
Cash						67,713						61,463
Total cash, cash equivalents and marketable securities						$	419,728					$	502,649

Estimated fair value of cash equivalents and marketable securities classified by the length of time that the securities have been in a continuous unrealized loss position

The estimated fair value and gross unrealized losses of cash equivalents and marketable securities classified by the length of time that the securities have been in a continuous unrealized loss position at September 30, 2021 and December 31, 2020 are as follows:

						Fair Value												Gross Unrealized Losses
(In thousands)						September 30, 2021						December 31, 2020						September 30, 2021						December 31, 2020
Less than 12 months
U.S. Government bonds and notes						$	18,078					$	70,548					$	(16)					$	(40)
Corporate notes, bonds and commercial paper						150,870						181,349						(152)						(82)
Total cash equivalents and marketable securities in a continuous unrealized loss position						$	168,948					$	251,897					$	(168)					$	(122)

Contractual maturities of cash equivalents (excluding money market funds which have no maturity) and marketable securities

The contractual maturities of cash equivalents (excluding money market funds which have no maturity) and marketable securities are summarized as follows:

(In thousands)						September 30, 2021
Due less than one year						$	164,232
Due from one year through three years						103,625
Total						$	267,857

X

- Definition

Tabular disclosure of cash and the reconciliation of available-for-sale securities from cost basis to fair value.

+ References

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- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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- Definition

Tabular disclosure of the components of cash, cash equivalents, and investments.

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- Definition

For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563

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