STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions |
6 Months Ended | 180 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Aug. 18, 2016 |
Aug. 13, 2015 |
|
| STOCKHOLDERS' EQUITY [Abstract] | |||||
| Authorized number of shares under stock repurchase program (in shares) | 500,000 | 500,000 | |||
| Common stock repurchased during the period (in shares) | 328,481 | 6,000,000 | |||
| Average cost of share repurchased (in dollars per share) | $ 81.62 | $ 24.44 | |||
| Common stock repurchased during the period | $ 26.8 | $ 147.3 | |||
| Shares repurchased to satisfy tax withholding obligation (in shares) | 29,736 | 30,447 | |||
| Value of Shares repurchased to satisfy tax withholding obligation | $ 2.6 | $ 2.5 | |||