STOCK-BASED COMPENSATION (Stock Option Activity and Intrinsic Value) (Details) - Stock Options Plans - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Options Activity [Roll Forward]
Options outstanding, beginning of year (in shares)			646,728
Granted (in shares)			26,402
Exercised (in shares)			(33,776)
Forfeited (in shares)			(15,640)
Expired (in shares)			(300)
Options outstanding, end of period (in shares)	623,414		623,414
Options exercisable, end of period (in shares)	342,736		342,736
Weighted Average Exercise Price [Roll Forward]
Options outstanding, beginning of year (in dollars per share)			$ 88.30
Granted (in dollars per share)			95.59
Exercised (in dollars per share)			66.79
Forfeited (in dollars per share)			103.66
Expired (in dollars per share)			76.51
Options outstanding, end of period (in dollars per share)	$ 89.43		89.43
Options exercisable, end of period (in dollars per share)	$ 79.29		$ 79.29
Stock Option Activity Additional Disclosures [Abstract]
Weighted-average remaining contractual term, options outstanding, end of period			6 years
Aggregate intrinsic value, options outstanding, end of period	$ 8,627,259		$ 8,627,259
Weighted-average remaining contractual terms, options exercisable, end of period			4 years 2 months 12 days
Aggregate intrinsic value, options exercisable, end of period	7,992,605		$ 7,992,605
Intrinsic value of options exercised	$ 718,343	$ 728,193	$ 1,215,063	$ 5,078,750