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SHORT-TERM INVESTMENTS | 6 Months Ended
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Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract] |
SHORT-TERM INVESTMENTS | SHORT-TERM INVESTMENTS Our Short-term investments consisted of the following:
| September 30, 2019
|  |  | Gross Unrealized |  |
| Cost or Amortized Cost |  | Gains |  | Losses |  | Fair Value
Short-term investments |  |  |  |  |  |  |  |  |  |  |
Bank time deposits | $ | 381,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 381,000 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | 272,758 |  |  | 1,286 |  |  | (17 | ) |  | 274,027 |
US Treasuries | 28,898 |  |  | 43 |  |  | — |  |  | 28,941 |
Commercial paper | 58,645 |  |  | — |  |  | — |  |  | 58,645 |
Total Short-term investments | $ | 741,301 |  |  | $ | 1,329 |  |  | $ | (17 | ) |  | $ | 742,613 |
| March 31, 2019
|  |  | Gross Unrealized |  |
| Cost or Amortized Cost |  | Gains |  | Losses |  | Fair Value
Short-term investments |  |  |  |  |  |  |  |  |  |  |
Bank time deposits | $ | 387,720 |  |  | $ | — |  |  | $ | — |  |  | $ | 387,720 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | 295,526 |  |  | 742 |  |  | (127 | ) |  | 296,141 |
US Treasuries | 55,656 |  |  | 27 |  |  | (49 | ) |  | 55,634 |
Commercial paper | 4,990 |  |  |  |  |  |  |  |  | 4,990 |
Total short-term investments | $ | 743,892 |  |  | $ | 769 |  |  | $ | (176 | ) |  | $ | 744,485 |
Based on our review of investments with unrealized losses, we did not consider these investments to be other-than-temporarily impaired as of September 30, 2019 or March 31, 2019. We do not intend to sell any of our investments with unrealized losses, nor is it more likely than not that we will be required to sell those investments. The following table summarizes the contracted maturities of our short-term investments at September 30, 2019:
| September 30, 2019
| Amortized Cost |  | Fair Value
Short-term investments |  |  |  |  |
Due in 1 year or less | $ | 637,405 |  |  | $ | 638,236 |
Due in 1 - 2 years | 103,896 |  |  | 104,377 |
Total short-term investments | $ | 741,301 |  |  | $ | 742,613 |

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