STOCKHOLDERS' EQUITY (Details 4) (USD $)	12 Months Ended
	Mar. 31, 2013
$11.58 - $20.00
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 11.58
Exercise price, high end of range (in dollars per share)	$ 20.00
Options outstanding:
Number of Shares	15,925
Weighted Average Exercise Price (in dollars per share)	$ 14.43
Weighted Average Remaining Contractual Life	10 months 17 days
Options exercisable:
Number of Shares	15,925
Weighted Average Exercise Price (in dollars per share)	$ 14.43
$20.01 - $30.00
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 20.01
Exercise price, high end of range (in dollars per share)	$ 30.00
Options outstanding:
Number of Shares	14,400
Weighted Average Exercise Price (in dollars per share)	$ 28.50
Weighted Average Remaining Contractual Life	1 year 5 months 16 days
Options exercisable:
Number of Shares	14,400
Weighted Average Exercise Price (in dollars per share)	$ 28.50
$30.01 - $40.00
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 30.01
Exercise price, high end of range (in dollars per share)	$ 40.00
Options outstanding:
Number of Shares	14,629
Weighted Average Exercise Price (in dollars per share)	$ 39.06
Weighted Average Remaining Contractual Life	1 year 1 month 2 days
Options exercisable:
Number of Shares	14,629
Weighted Average Exercise Price (in dollars per share)	$ 39.06
$40.01 - $50.00
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 40.01
Exercise price, high end of range (in dollars per share)	$ 50.00
Options outstanding:
Number of Shares	38,800
Weighted Average Exercise Price (in dollars per share)	$ 44.73
Weighted Average Remaining Contractual Life	1 year 7 months 10 days
Options exercisable:
Number of Shares	38,800
Weighted Average Exercise Price (in dollars per share)	$ 44.73
$50.01 - $60.00
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 50.01
Exercise price, high end of range (in dollars per share)	$ 60.00
Options outstanding:
Number of Shares	47,278
Weighted Average Exercise Price (in dollars per share)	$ 53.36
Weighted Average Remaining Contractual Life	2 years 8 months 16 days
Options exercisable:
Number of Shares	47,278
Weighted Average Exercise Price (in dollars per share)	$ 53.36
$60.01 - $70.00
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 60.01
Exercise price, high end of range (in dollars per share)	$ 70.00
Options outstanding:
Number of Shares	127,949
Weighted Average Exercise Price (in dollars per share)	$ 64.08
Weighted Average Remaining Contractual Life	4 years 10 months 20 days
Options exercisable:
Number of Shares	125,682
Weighted Average Exercise Price (in dollars per share)	$ 64.13
$70.01 - $75.82
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 70.01
Exercise price, high end of range (in dollars per share)	$ 75.82
Options outstanding:
Number of Shares	56,181
Weighted Average Exercise Price (in dollars per share)	$ 74.87
Weighted Average Remaining Contractual Life	7 years 5 months 1 day
Options exercisable:
Number of Shares	56,181
Weighted Average Exercise Price (in dollars per share)	$ 74.87
$11.58 - $75.82
Data for options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 11.58
Exercise price, high end of range (in dollars per share)	$ 75.82
Options outstanding:
Number of Shares	315,162
Weighted Average Exercise Price (in dollars per share)	$ 56.72
Weighted Average Remaining Contractual Life	4 years 29 days
Options exercisable:
Number of Shares	312,895
Weighted Average Exercise Price (in dollars per share)	$ 56.68