ACCOUNTING FOR STOCK-BASED COMPENSATION (Details 2) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013
Stock Option and Other Compensation Plans
Number of shares authorized under the plans	3,480,000
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 at the beginning of the period (in shares)	315,162
Exercises (in shares)	(35,012)
Cancellations (in shares)	(2,155)
Options outstanding at the end of the period (in shares)	277,995	315,162
Options exercisable at the end of the period (in shares)	276,181
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share)	$ 56.72
Exercises (in dollars per share)	$ 41.48
Cancellations (in dollars per share)	$ 61.37
Options outstanding at the end of the period (in dollars per share)	$ 58.60	$ 56.72
Options exercisable at the end of the period (in dollars per share)	$ 58.58
Weighted Average Contractual Life
Options outstanding at the end of the period	3 years 11 months 16 days	4 years 29 days
Aggregate Intrinsic Value
Exercises (in dollars)	$ 676,000
Remaining unrecognized compensation costs (in dollars)	$ 0