OTHER EXPENSE (INCOME), NET (Schedule of Bad Debt) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Balance at beginning of period | $ 2,014 | $ 1,576 | $ 4,390 |
| Provision during the period | 327 | 1,238 | 1,576 |
| Doubtful account classified as bad debt | 0 | 0 | (4,390) |
| Reversal of allowance for doubtful account | 0 | (800) | 0 |
| Balance at end of period | $ 2,341 | $ 2,014 | $ 1,576 |