STOCK-BASED COMPENSATION (Stock Option Activity and Intrinsic Value) (Details) - Stock Options Plans - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Options Activity [Roll Forward]
Options outstanding, beginning of year (in shares)			500,168
Granted (in shares)			17,899
Exercised (in shares)			(111,122)
Forfeited (in shares)			(7,750)
Expired (in shares)			0
Options outstanding, end of period (in shares)	399,195		399,195
Options exercisable, end of period (in shares)	103,323		103,323
Weighted Average Exercise Price [Roll Forward]
Options outstanding, beginning of year (in dollars per share)			$ 93.89
Granted (in dollars per share)			180.33
Exercised (in dollars per share)			78.14
Forfeited (in dollars per share)			100.79
Expired (in dollars per share)			0
Options outstanding, end of period (in dollars per share)	$ 102.02		102.02
Options exercisable, end of period (in dollars per share)	$ 85.31		$ 85.31
Stock Option Activity Additional Disclosures [Abstract]
Weighted-average remaining contractual term, options outstanding, end of period			6 years 9 months 18 days
Aggregate intrinsic value, options outstanding, end of period	$ 34,964,006		$ 34,964,006
Weighted-average remaining contractual terms, options exercisable, end of period			4 years 7 months 6 days
Aggregate intrinsic value, options exercisable, end of period	10,773,204		$ 10,773,204
Intrinsic value of options exercised	$ 9,519,593	$ 496,721	$ 11,541,269	$ 496,721