STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION - BONUS SHARE PROGRAM (Details) - USD ($) $ in Millions |
Apr. 30, 2016 |
Jan. 31, 2016 |
Mar. 31, 2015 |
|---|---|---|---|
| Stock-Based Compensation Plans | |||
| Total accrued liability | $ 8.0 | $ 6.6 | |
| 2016 Plan | Bonus Share Program | |||
| Stock-Based Compensation Plans | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 75,000 | ||
| 2016 Plan | Combined Stock Bonus Program and Bonus Share Program | |||
| Stock-Based Compensation Plans | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 200,000 | ||
| 2017 Plan | Bonus Share Program | |||
| Stock-Based Compensation Plans | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 81,250 | ||
| 2017 Plan | Combined Stock Bonus Program and Bonus Share Program | |||
| Stock-Based Compensation Plans | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 206,250 |