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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Available-for-sale Securities (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) security | Dec. 31, 2018 USD ($) security
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale securities in unrealized gain positions | security | 34 | 26
Available-for-sales securities in unrealized loss positions | security | 29 | 32
Unrealized losses | $ 170 | $ 170
Unrealized losses individually |  |
Debt Securities, Available-for-sale [Line Items] |  |
Unrealized losses | 30 | 30
Corporate debt securities - Funds Held for Clients |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,530 | 4,334
Gross Unrealized Gains | 52 | 21
Gross Unrealized Losses | (26) | (99)
Aggregate Estimated Fair Value | $ 4,556 | $ 4,256

X
- Definition This item represents the current level of subordination of the entity's receipt of consideration should the assets underlying the security be liquidated when the level of subordination was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired. + References No definition available. + Details
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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