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Cash, Cash Equivalents, Marketable Securities, and Restricted Cash - Components (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Cash, Money Market Funds, and Marketable Securities
Cash and cash equivalents	$ 263,320	$ 148,813	$ 277,592
Fair value, cash balances	263,320	148,813
Cost, available-for-sale securities	16,977	144,700
Gross unrealized gain, available-for-sale securities	3	82
Gross unrealized loss, available-for-sale securities	0	0
Fair value, available-for-sale debt securities	16,980	144,782
Cost, cash balances and available-for-sale securities	280,297	293,513
Gross unrealized gain, cash balances and available-for-sale securities	3	82
Gross unrealized loss, cash balances and available-for-sale securities	0	0
Fair value, cash balances and available-for-sale securities	280,300	293,595
Commercial paper
Cash, Money Market Funds, and Marketable Securities
Cost, available-for-sale securities	16,826	144,299
Gross unrealized gain, available-for-sale securities	3	82
Gross unrealized loss, available-for-sale securities	0	0
Fair value, available-for-sale debt securities	16,829	144,381
Money market
Cash, Money Market Funds, and Marketable Securities
Cost, available-for-sale securities	100	350
Gross unrealized gain, available-for-sale securities	0	0
Fair value, available-for-sale debt securities	100	350
Gross unrealized loss, cash balances and available-for-sale securities	0	0
Certificates of deposit
Cash, Money Market Funds, and Marketable Securities
Cost, available-for-sale securities	51	51
Gross unrealized gain, available-for-sale securities	0	0
Fair value, available-for-sale debt securities	51	51
Gross unrealized loss, cash balances and available-for-sale securities	$ 0	$ 0

X

- Definition

Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Also includes amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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Cash, Cash Equivalents And Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, Before Tax

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Cash, Cash Equivalents And Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, Before Tax

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Represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash and cash equivalents and marketable securities.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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