STOCK-BASED COMPENSATION Valuation Assumptions (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	41.80%	45.30%	45.70%
Risk-free interest rate	0.60%	1.00%	1.40%
Expected dividends	1.20%	0.60%	0.60%
Expected life (in years)	4 years 110 days	4 years	4 years 73 days
Weighted-average grant date fair value	$ 10.31	$ 12.06	$ 11.92
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	32.40%	37.30%	38.70%
Risk-free interest rate	0.10%	0.10%	0.20%
Expected dividends	1.00%	0.60%	0.60%
Expected life (in years)	183 days	183 days	183 days
Weighted-average grant date fair value	$ 9.00	$ 8.69	$ 8.67