STOCK PLANS AND STOCK-BASED COMPENSATION Stock Option Activity (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, March 31, 2015 (shares) | shares	1,558
Options granted (shares) | shares	287
Options exercised (shares) | shares	(329)
Options forfeited or expired (shares) | shares	(55)
Options outstanding, March 31, 2016 (shares) | shares	1,461
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price of options outstanding at March 31, 2015 (in dollars per share) | $ / shares	$ 36.59
Weighted average exercise price of options granted (in dollars per share) | $ / shares	53.55
Weighted average exercise price of options exercised (in dollars per share) | $ / shares	28.80
Weighted average exercise price of options forfeited or expired (in dollars per share) | $ / shares	48.00
Weighted average exercise price of options outstanding at March 31, 2016 (in dollars per share) | $ / shares	$ 41.24
Weighted average remaining contractual life of options outstanding at March 31, 2016 (in years)	3 years 292 days
Aggregate intrinsic value of options outstanding at March 31, 2016 | $	$ 4,342
Vested or expected to vest at March 31, 2016 (in shares) | shares	1,431
Weighted average exercise price of options vested or expected to vest at March 31, 2016 (in dollars per share) | $ / shares	$ 41.02
Weighted average remaining contractual life of options vested or expected to vest at March 31, 2016 (in years)	3 years 292 days
Aggregate intrinsic value of options vested or expected to vest at March 31, 2016 | $	$ 4,342
Exercisable at March 31, 2016 (in shares) | shares	1,038
Weighted average exercise price of options exercisable at March 31, 2016 (in dollars per share) | $ / shares	$ 37.15
Weighted average remaining contractual life of options exercisable at March 31, 2016 (in years)	3 years
Aggregate intrinsic value of options exercisable at March 31, 2016 | $	$ 4,334