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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES, Reconciliation of Beginning and Ending Balances (Details) - Recurring [Member] - Level 3 [Member]
$ in Thousands
6 Months Ended
Jun. 30, 2018
USD ($)
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Roll Forward]  
Beginning balance $ 0
Acquisitions and settlements [Abstract]  
Acquisition of ASI (Note 14) 4,214
Settlements 0
Total remeasurement adjustments [Abstract]  
(Gains) or losses recorded against goodwill (208)
Ending balance 4,006 [1]
The amount of total (gains) or losses for the year included in earnings or changes to net assets, attributable to changes in unrealized (gains) or losses relating to assets or liabilities still held at year-end. $ 0
[1] Included in other current and long-term liabilities