STOCKHOLDERS' EQUITY (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Stock Option and Other Compensation Plans
Number of shares that remain available for future issuance	512,000
Minimum
Stock Option and Other Compensation Plans
Vesting period for awards granted under the plans	1 year
Maximum
Stock Option and Other Compensation Plans
Vesting period for awards granted under the plans	3 years
Stock options
Stock Option and Other Compensation Plans
Term of awards from the date of grant	10 years
Number of Shares
Options outstanding, beginning of year (in shares)	224,964	315,162	376,331
Options exercised (in shares)	(26,224)	(84,853)	(50,505)
Options canceled or expired (in shares)	(6,906)	(5,345)	(10,664)
Options outstanding, end of year (in shares)	191,834	224,964	315,162
Options exercisable, end of year (in shares)	191,834	223,150	312,895
Weighted Average Exercise Price
Options outstanding, beginning of year (in dollars per share)	$ 62.75	$ 56.72	$ 55.10
Options exercised (in dollars per share)	$ 40.93	$ 41.55	$ 42.75
Options canceled or expired (in dollars per share)	$ 54.58	$ 43.66	$ 65.72
Options outstanding, end of year (in dollars per share)	$ 66.03	$ 62.75	$ 56.72
Options exercisable, end of year (in dollars per share)	$ 66.03	$ 62.76	$ 56.68