COMMON STOCK REPURCHASES (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Equity [Abstract]
Remaining shares authorized for repurchase under program	1,028,586		1,028,586
Shares repurchased			841,249	613,021
Total cost of shares repurchased			$ 39,222	$ 26,828
Average cost per share of shares repurchased (in dollars per share)	$ 46.62	$ 43.76
Value of shares withheld in satisfaction of employee tax withholding obligations			$ 10,789	$ 9,123