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Investments in Marketable Debt Securities | 3 Months Ended
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Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Investment in Marketable Debt Securities |
5. | Investments in Marketable Debt Securities
Amortized cost, allowance for credit losses, gross unrealized gains/losses in accumulated other comprehensive income (loss) and fair value of marketable debt securities, available-for-sale, by type of security consisted of the following (in thousands):
|  | March 31, 2020 |
|  | Amortized Cost |  |  | Allowance for Credit Losses |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 113,885 |  |  | $ | — |  |  | $ | 835 |  |  | $ | — |  |  | $ | 114,720 |
U.S. government sponsored entities |  |  | 9,128 |  |  |  | — |  |  |  | 9 |  |  |  | — |  |  |  | 9,137 |
Corporate debt |  |  | 19,801 |  |  |  | — |  |  |  | 5 |  |  |  | (95 | ) |  |  | 19,711 |
ABS and other |  |  | 301 |  |  |  | — |  |  |  | — |  |  |  | (5 | ) |  |  | 296 |
|  | $ | 143,115 |  |  | $ | — |  |  | $ | 849 |  |  | $ | (100 | ) |  | $ | 143,864 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 10,015 |  |  | $ | — |  |  | $ | 495 |  |  | $ | — |  |  | $ | 10,510 |
U.S. government sponsored entities |  |  | 1,299 |  |  |  | — |  |  |  | 29 |  |  |  | — |  |  |  | 1,328 |
Corporate debt |  |  | 25,633 |  |  |  | — |  |  |  | 634 |  |  |  | (661 | ) |  |  | 25,606 |
ABS and other |  |  | 8,007 |  |  |  | — |  |  |  | 44 |  |  |  | (285 | ) |  |  | 7,766 |
|  | $ | 44,954 |  |  | $ | — |  |  | $ | 1,202 |  |  | $ | (946 | ) |  | $ | 45,210 |
|  | December 31, 2019 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 124,389 |  |  | $ | 196 |  |  | $ | (5 | ) |  | $ | 124,580 |
U.S. government sponsored entities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Corporate debt |  |  | 26,128 |  |  |  | 44 |  |  |  | — |  |  |  | 26,172 |
|  | $ | 150,517 |  |  | $ | 240 |  |  | $ | (5 | ) |  | $ | 150,752 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 24,188 |  |  | $ | 235 |  |  | $ | — |  |  | $ | 24,423 |
U.S. government sponsored entities |  |  | 1,353 |  |  |  | 3 |  |  |  | (1 | ) |  |  | 1,355 |
Corporate debt |  |  | 25,447 |  |  |  | 1,027 |  |  |  | (3 | ) |  |  | 26,471 |
ABS and other |  |  | 8,480 |  |  |  | 93 |  |  |  | (13 | ) |  |  | 8,560 |
|  | $ | 59,468 |  |  | $ | 1,358 |  |  | $ | (17 | ) |  | $ | 60,809 |
The Company’s investments in available-for-sale debt securities that have been in a continuous unrealized loss position, for which an allowance for credit losses has not been recorded, by type of security consisted of the following (in thousands):
|  | March 31, 2020 |
|  | Less than 12 months |  |  | 12 months or greater |  |  | Total |
|  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
Corporate debt |  | $ | 17,553 |  |  | $ | (756 | ) |  | $ | — |  |  | $ | — |  |  | $ | 17,553 |  |  | $ | (756 | )
ABS and other |  |  | 6,207 |  |  |  | (290 | ) |  |  | — |  |  |  | — |  |  |  | 6,207 |  |  |  | (290 | )
|  | $ | 23,760 |  |  | $ | (1,046 | ) |  | $ | — |  |  | $ | — |  |  | $ | 23,760 |  |  | $ | (1,046 | )
|  | December 31, 2019 |
|  | Less than 12 months |  |  | 12 months or greater |  |  | Total |
|  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
U.S. treasuries |  | $ | 39,823 |  |  | $ | (5 | ) |  | $ | — |  |  | $ | — |  |  | $ | 39,823 |  |  | $ | (5 | )
U.S. government sponsored entities |  |  | — |  |  |  | — |  |  |  | 566 |  |  |  | (1 | ) |  |  | 566 |  |  |  | (1 | )
Corporate debt |  |  | 6,029 |  |  |  | (3 | ) |  |  | — |  |  |  | — |  |  |  | 6,029 |  |  |  | (3 | )
ABS and other |  |  | 1,971 |  |  |  | (13 | ) |  |  | — |  |  |  | — |  |  |  | 1,971 |  |  |  | (13 | )
|  | $ | 47,823 |  |  | $ | (21 | ) |  | $ | 566 |  |  | $ | (1 | ) |  | $ | 48,389 |  |  | $ | (22 | )
Gross realized gains and gross realized losses from the sales of the Company’s available-for-sale debt securities consisted of the following (in thousands):
|  | Three Months Ended March 31, |
|  | 2020 |  |  | 2019 |
Gross realized gains (1) |  | $ | 53 |  |  | $ | 35 |
Gross realized losses (1) |  | $ | — |  |  | $ | (47 | )
(1) | Recorded in other (expense) income, net in the condensed consolidated statements of net and comprehensive income. The cost basis of securities sold were determined based on the specific identification method.
The Company invests its excess cash in a diversified portfolio of fixed and variable rate debt securities to meet current and future cash flow needs. All investments are made in accordance with the Company’s approved investment policy. As of March 31, 2020, the portfolio had an average credit rating of AA+ and weighted term to final maturity of 1.8 years, with 54 securities in the portfolio with an unrealized loss aggregating $1.0 million, or 0.6% of amortized cost, and an average credit rating of A. As of March 31, 2020, the Company performed an impairment analysis and determined an allowance for credit losses was not required. The Company determined that it did not have an intent to sell and it was not more likely than not that the Company would be required to sell any security based on its current liquidity position, or to maintain compliance with its investment policy, specifically as it relates to minimum credit ratings. The Company evaluated the securities with an unrealized loss considering severity of loss, credit ratings, specific credit events during the period since acquisition, overall likelihood of default, market sector, potential impact from the current economic situation and a review of an issuer’s liquidity and financial strength, as needed. The Company concluded that it would receive all scheduled interest and principle payments. The Company, therefore, determined qualitatively that the unrealized loss was related to changes in interest rates and other market factors and that no allowance for credit losses was required. Amortized cost and fair value of marketable debt securities, available-for-sale, by contractual maturity consisted of the following (in thousands, except weighted average data):
|  | March 31, 2020 |  |  | December 31, 2019 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 143,115 |  |  | $ | 143,864 |  |  | $ | 150,517 |  |  | $ | 150,752 |
Due after one year through five years |  |  | 28,923 |  |  |  | 29,204 |  |  |  | 41,123 |  |  |  | 41,794 |
Due after five years through ten years |  |  | 10,840 |  |  |  | 10,960 |  |  |  | 12,813 |  |  |  | 13,467 |
Due after ten years |  |  | 5,191 |  |  |  | 5,046 |  |  |  | 5,532 |  |  |  | 5,548 |
|  | $ | 188,069 |  |  | $ | 189,074 |  |  | $ | 209,985 |  |  | $ | 211,561 |
Weighted average contractual maturity |  |  |  |  |  |  | 1.8 years |  |  |  |  |  |  |  | 1.7 years |
Actual maturities may differ from contractual maturities because certain issuers have the right to prepay certain obligations with or without prepayment penalties.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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