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Financial Instruments | 9 Months Ended
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Sep. 30, 2019
Financial Instruments, Owned, at Fair Value [Abstract] |
Financial Instruments | Cash, Cash Equivalents, and Marketable Securities The following table summarizes the Company’s cash, cash equivalents, and marketable securities and the fair value categorization of the financial instruments measured at fair value on a recurring basis:
| September 30, |  | December 31,
| 2019 |  | 2018
| (In thousands)
Cash | $ | 28,119 |  |  | $ | 37,190 |
Time deposits | 4,884 |  |  | 3,810 |
Money market funds (Level 1) | 85,676 |  |  | 120,832 |
Debt securities issued by the U.S. Treasury (Level 1) | 1,120,723 |  |  | 1,117,175 |
Total | $ | 1,239,402 |  |  | $ | 1,279,007 |
Cash and cash equivalents | $ | 109,288 |  |  | $ | 357,415 |
Restricted cash (included in Other long-term assets) | 9,391 |  |  | 9,338 |
Total Cash, cash equivalents, and restricted cash | 118,679 |  |  | 366,753 |
Marketable securities | 1,120,723 |  |  | 912,254 |
Total | $ | 1,239,402 |  |  | $ | 1,279,007 |
The fair value of the debt securities held as of September 30, 2019 was $1.12 billion, including $0.4 million of gross and net unrealized gains. All of the debt securities held as of September 30, 2019 are scheduled to mature in less than one year. Fair Value Measurements The fair value of the Company’s investments in money market funds approximates their face value. Such instruments are included in Cash and cash equivalents. The fair value of the debt securities consisting of U.S. Treasury bills is based on their quoted market prices. Debt securities purchased with original maturities in excess of three months are included in Marketable securities. The fair value of all of these financial instruments are classified as Level 1 in the fair value hierarchy. The Company’s other financial instruments include cash, accounts receivable, restricted cash, and accounts payable. As of September 30, 2019, the carrying value of these financial instruments approximated their fair value. The fair values of the senior notes due 2023, 2025, and 2027 were $763.8 million, $546.9 million, and $577.8 million, respectively, as of September 30, 2019. The fair values of these debt instruments are based on available market information from public data sources and are classified as Level 2.

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- Definition The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures. + References No definition available. + Details
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- References No definition available. + Details
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