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INVESTMENT SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract] |
Held-to-maturity Securities |
(in thousands) |  | June 30, 2018 |
|  | Amortized cost, as adjusted |  |  | Gross unrealized holding gains |  |  | Gross unrealized holding losses |  |  | Estimated fair value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |
Obligations of domestic governmental agencies (maturing between July 2018 and April 2019) (held-to-maturity) |  | $ | 20,573 |  |  | $ | -- |  |  | $ | 17 |  |  | $ | 20,556 |
Total short-term investment securities |  | $ | 20,573 |  |  | $ | -- |  |  | $ | 17 |  |  | $ | 20,556 |
|  | December 31, 2017 |
|  | Amortized cost, as adjusted |  |  | Gross unrealized holding gains |  |  | Gross unrealized holding losses |  |  | Estimated fair value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |
Obligations of domestic governmental agencies (maturing between January 2018 and November 2018) (held-to-maturity) |  | $ | 27,999 |  |  |  | -- |  |  | $ | 35 |  |  | $ | 27,964 |
Total short-term investment securities |  | $ | 27,999 |  |  |  | -- |  |  | $ | 35 |  |  | $ | 27,964 |

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- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- References No definition available. + Details
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