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SHORT-TERM INVESTMENTS | 3 Months Ended
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Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract] |
SHORT-TERM INVESTMENTS | SHORT-TERM INVESTMENTS Our short-term investments consisted of the following:
| June 30, 2017
|  |  | Gross Unrealized |  |
| Cost or Amortized Cost |  | Gains |  | Losses |  | Fair Value
Short-term investments |  |  |  |  |  |  |  |  |  |  |
Bank time deposits | $ | 200,945 |  |  | $ | — |  |  | $ | — |  |  | $ | 200,945 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | 230,070 |  |  | 110 |  |  | (165 | ) |  | 230,015 |
Commercial paper | 17,517 |  |  | 2 |  |  | — |  |  | 17,519 |
Mutual funds | 4,337 |  |  | 147 |  |  | (14 | ) |  | 4,470 |
Total short-term investments | $ | 452,869 |  |  | $ | 259 |  |  | $ | (179 | ) |  | $ | 452,949 |
| March 31, 2017
|  |  | Gross Unrealized |  |
| Cost or Amortized Cost |  | Gains |  | Losses |  | Fair Value
Short-term investments |  |  |  |  |  |  |  |  |  |  |
Bank time deposits | $ | 175,745 |  |  | $ | — |  |  | $ | — |  |  | $ | 175,745 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | 243,140 |  |  | 98 |  |  | (219 | ) |  | 243,019 |
Commercial paper | 25,938 |  |  | 5 |  |  | (7 | ) |  | 25,936 |
Mutual funds | 4,118 |  |  | 123 |  |  | (9 | ) |  | 4,232 |
Total short-term investments | $ | 448,941 |  |  | $ | 226 |  |  | $ | (235 | ) |  | $ | 448,932 |
We consider various factors in the review of investments with an unrealized loss, including the credit quality of the issuer, the duration that the fair value has been less than the adjusted cost basis, the severity of the impairment, the reason for the decline in value and our intent to sell and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. Based on our review, we did not consider these investments to be other-than-temporarily impaired as of June 30, 2017 or March 31, 2017. The following table summarizes the contracted maturities of our short-term investments at June 30, 2017:
| June 30, 2017
| Amortized Cost |  | Fair Value
Short-term investments |  |  |  |  |
Due in 1 year or less | $ | 358,780 |  |  | $ | 358,881 |
Due in 1 - 2 years | 94,085 |  |  | 94,068 |
Total short-term investments | $ | 452,865 |  |  | $ | 452,949 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27405-111563 + Details
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