STOCK-BASED COMPENSATION (Details 1) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||
| Allocated Share-based Compensation Expense | $ 3.8 | $ 2.8 | $ 9.8 | $ 9.1 |
| Mark-to-market adjustments | (1.4) | (5.4) | 1.0 | (3.2) |
| Total expense | $ 2.4 | $ (2.6) | $ 10.8 | $ 5.9 |