Cash and Cash Equivalents and Investments in Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2018

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Available-For-Sale Securities

The following is a summary of our marketable securities as of December 31, 2017:

Amortized Cost

Gross Unrealized Gain

Gross Unrealized Loss

Fair Value

(Net Carrying Amount)

(In thousands)

December 31, 2017

Commercial paper

—

Corporate debt securities

—

State and political subdivisions debt securities

—

Total marketable securities

—

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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