SHARE-BASED COMPENSATION - Equity Awards With Market Conditions (Details) - Share Bonus Awards with Market Conditions	12 Months Ended
	Mar. 31, 2019 $ / shares shares
Share-based compensation
Targeted number of awards as of March 31, 2019 (in shares)	2,521,930
Maximum
Share-based compensation
Range of shares that may be issued (in shares)	5,043,860
Fiscal Year 2018
Share-based compensation
Targeted number of awards as of March 31, 2019 (in shares)	1,316,279
Average grant date fair value (per share) | $ / shares	$ 14.00
Fiscal Year 2018 | Minimum
Share-based compensation
Range of shares that may be issued (in shares)	0
Fiscal Year 2018 | Maximum
Share-based compensation
Range of shares that may be issued (in shares)	2,632,558
Fiscal 2017
Share-based compensation
Targeted number of awards as of March 31, 2019 (in shares)	586,077
Average grant date fair value (per share) | $ / shares	$ 20.25
Fiscal 2017 | Minimum
Share-based compensation
Range of shares that may be issued (in shares)	0
Fiscal 2017 | Maximum
Share-based compensation
Range of shares that may be issued (in shares)	1,172,154
Fiscal 2016
Share-based compensation
Targeted number of awards as of March 31, 2019 (in shares)	619,574
Average grant date fair value (per share) | $ / shares	$ 17.57
Fiscal 2016 | Minimum
Share-based compensation
Range of shares that may be issued (in shares)	0
Fiscal 2016 | Maximum
Share-based compensation
Range of shares that may be issued (in shares)	1,239,148