INCOME TAXES - Activity related to unrecognized tax benefits, net of federal benefit, and excludes interest and penalties (Details 4) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | ||
| Balance at January 1 | $ 25 | $ 54 |
| Decreases as a result of positions taken during prior periods | (25) | (29) |
| Balance at December 31 | $ 25 | |