Cash And Cash Equivalents, Gross Unrealized Gains

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Cash And Cash Equivalents Gross Unrealized Loss

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Cash, Cash Equivalents, And Short Term Investments, Amortized Cost

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

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

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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 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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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. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Investments (Summary of Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents:
AMORTIZED COST	$ 129,787	$ 143,940	$ 248,702	$ 202,818
FAIR VALUE	129,787	143,940
Investments:
AMORTIZED COST	88,657	165,342
GROSS UNREALIZED GAINS	42	0
GROSS UNREALIZED LOSSES	(54)	(92)
FAIR VALUE	88,645	165,250
Total cash, cash equivalents and investments, Amortized Cost	218,444	309,282
Total cash, cash equivalents and investments, Gross Unrealized Gains	42	0
Total cash, cash equivalents and investments, Gross Unrealized Losses	(54)	(92)
Total cash, cash equivalents and investments, Fair Value	218,432	309,190
Cash and cash equivalents
Cash and cash equivalents:
AMORTIZED COST	129,787	143,940
GROSS UNREALIZED GAINS	0	0
GROSS UNREALIZED LOSSES	0	0
FAIR VALUE	129,787	143,940
Commercial paper (due within 1 year)
Investments:
AMORTIZED COST	44,792	64,629
GROSS UNREALIZED GAINS	32	0
GROSS UNREALIZED LOSSES	(9)	(7)
FAIR VALUE	44,815	64,622
Corporate bonds (due within 1 year)
Investments:
AMORTIZED COST	43,865	60,640
GROSS UNREALIZED GAINS	10	0
GROSS UNREALIZED LOSSES	(45)	(76)
FAIR VALUE	$ 43,830	60,564
U.S. Government and government agencies (due within 1 year)
Investments:
AMORTIZED COST		40,073
GROSS UNREALIZED GAINS		0
GROSS UNREALIZED LOSSES		(9)
FAIR VALUE		$ 40,064