ACCOUNTING FOR STOCK-BASED COMPENSATION (Details 2) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013
Stock Option and Other Compensation Plans
Number of shares authorized for issuance to equity awards under the plans	3,480,000		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
Grants (in shares)	0	0	0	0
Exercises (in shares)			(37,037)
Cancellations (in shares)			(5,345)
Options outstanding at the end of the period (in shares)	272,780		272,780		315,162
Options exercisable at the end of the period (in shares)	270,966		270,966
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share)			$ 56.72
Exercises (in dollars per share)			$ 40.41
Cancellations (in dollars per share)			$ 43.66
Options outstanding at the end of the period (in dollars per share)	$ 59.19		$ 59.19		$ 56.72
Options exercisable at the end of the period (in dollars per share)	$ 59.17		$ 59.17
Weighted Average Contractual Life
Options outstanding at the end of the period			3 years 9 months 11 days		4 years 29 days
Aggregate Intrinsic Value
Exercises (in dollars)			$ 750,000
Remaining unrecognized compensation cost (in dollars)	$ 0		$ 0