MARKETABLE SECURITIES (Schedule of Contractual Maturities) (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2017 |
Jun. 30, 2016 |
Jun. 30, 2015 |
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| Marketable Securities Schedule Of Contractual Maturities Details | ||||
| Less than 12 months, Fair Value | $ 51,124 | $ 72,269 | $ 22,895 | |
| Less than 12 months, Gross unrealized losses | (66) | (148) | (11) | |
| 12 months or greater, Fair Value | 39,373 | 103,116 | 20,070 | |
| 12 months or greater, Gross unrealized losses | (180) | (443) | (37) | |
| Maturities of available-for-sale marketable securities | $ 32,782 | $ 80,269 | $ 6,350 | |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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