STOCK-BASED COMPENSATION Valuation Assumptions (Details) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	41.20%	48.10%	41.80%	45.60%
Risk-free interest rate	0.60%	0.60%	0.60%	1.10%
Expected dividends	1.20%	0.60%	1.20%	0.60%
Expected life (in years)	4 years 110 days	4 years	4 years 110 days	4 years
Weighted-average grant date fair value	$ 10.10	$ 11.86	$ 10.31	$ 12.08
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility			38.40%	38.70%
Risk-free interest rate			0.10%	0.10%
Expected dividends			1.10%	0.60%
Expected life (in years)			6 months	6 months
Weighted-average grant date fair value			$ 8.95	$ 8.00