v3.19.3

Fair Value Measurements - Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Debt securities	$ 201,662	$ 151,378
Liabilities
Transfer of assets from level 1 to level 2	0
Transfer of assets from level 2 to level 1	0
Transfer of liabilities from level 1 to level 2	0
Transfer of liabilities from level 2 to level 1	0
Commercial paper
Assets
Debt securities	4,497	72,397
US Treasury securities
Assets
Debt securities	174,488
Corporate debt securities
Assets
Debt securities	22,677	78,981
Recurring basis
Assets
Money market deposits	3,768	10,364
Corporate equity securities	1,812	3,072
Foreign exchange derivative instruments	17
Total assets at fair value	207,259	164,814
Liabilities
Foreign exchange derivative instruments		135
Total		135
Recurring basis \| Commercial paper
Assets
Debt securities	4,497	72,397
Recurring basis \| US Treasury securities
Assets
Debt securities	174,488
Recurring basis \| Corporate debt securities
Assets
Debt securities	22,677	78,981
Recurring basis \| Actively Quoted Markets for Identical Assets Level 1
Assets
Money market deposits	3,768	10,364
Corporate equity securities	1,812	3,072
Total assets at fair value	5,580	13,436
Recurring basis \| Significant Other Observable Inputs Level 2
Assets
Foreign exchange derivative instruments	17
Total assets at fair value	201,679	151,378
Liabilities
Foreign exchange derivative instruments		135
Total		135
Recurring basis \| Significant Other Observable Inputs Level 2 \| Commercial paper
Assets
Debt securities	4,497	72,397
Recurring basis \| Significant Other Observable Inputs Level 2 \| US Treasury securities
Assets
Debt securities	174,488
Recurring basis \| Significant Other Observable Inputs Level 2 \| Corporate debt securities
Assets
Debt securities	$ 22,677	$ 78,981

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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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).

+ References

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-Publisher FASB
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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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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

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Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

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