SHARE-BASED COMPENSATION EXPENSE - Summary of RSU Plan (Detail) - shares shares in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Share based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Outstanding, beginning | 335 | |
| Granted | 185 | |
| Vested | 236 | |
| Forfeited or expired | (14) | |
| Outstanding, ending | 270 | 335 |
| Restricted Stock Units [Member] | ||
| Share based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Outstanding, beginning | 91 | 45 |
| Granted | 438 | 88 |
| Distributed | (67) | (42) |
| Vested | 0 | 0 |
| Forfeited or expired | 0 | 0 |
| Outstanding, ending | 462 | 91 |
| Vested Restricted Stock Units (RSUs) [Member] | ||
| Share based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Outstanding, beginning | 91 | 45 |
| Granted | 0 | 0 |
| Distributed | (67) | (42) |
| Vested | 238 | 88 |
| Forfeited or expired | 0 | 0 |
| Outstanding, ending | 262 | 91 |