COMPENSATION PROGRAMS - Schedule of Performance-Based and Service-Based Stock Award Activity (Details) - Stock Awards Activity [Member] |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
$ / shares
shares
| |
| Equity instruments other than options, nonvested, number of shares [Roll Forward] | |
| Unvested equity awards outstanding at beginning of period (in shares) | shares | 296,940 |
| Grants (in shares) | shares | 183,734 |
| Vestings (in shares) | shares | (34,899) |
| Unvested equity outstanding at end of period (in shares) | shares | 445,775 |
| Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract] | |
| Unvested equity awards outstanding at beginning of period (in dollars per share) | $ / shares | $ 9.90 |
| Grants (in dollars per share) | $ / shares | 8.60 |
| Vestings (in dollars per share) | $ / shares | 12.47 |
| Unvested equity awards outstanding at end of period (in dollars per share) | $ / shares | $ 9.17 |