COMMON STOCK REPURCHASES (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, shares	1,139,548
Repurchase of common stock	$ 52,948	$ 34,236	$ 497,393
Repurchase of common stock, average price per share (in dollars per share)	$ 46.46
Remaining shares authorized for repurchase under program	730,105
Value of shares withheld in satisfaction of employee tax withholding obligations	$ 11,429	$ 9,736	$ 11,068
Treasury stock retired (shares)	0	0	0
Open Market Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, shares		764,176	9,077,223
Repurchase of common stock		$ 34,200	$ 497,400
Repurchase of common stock, average price per share (in dollars per share)		$ 44.80	$ 54.80