INTANGIBLE ASSETS - Summary of amortization expense for next five year (Details 2) $ in Thousands |
Dec. 31, 2016
USD ($)
|
|---|---|
| Goodwill and Intangible Assets Disclosure [Abstract] | |
| 2017 | $ 4,315 |
| 2018 | 3,308 |
| 2019 | 1,679 |
| 2020 | 1,021 |
| 2021 | 960 |
| Thereafter | 4,440 |
| Total amortization expense | $ 15,723 |