Amount of noncash expense for share-based payment arrangement.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Number of shares related to Restricted Stock Award forfeited during the period.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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STOCK-BASED COMPENSATION (Company Restricted Stock and Total Stock-Based Compensation) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Grant date fair value (in dollars per share)				$ 90.23
Compensation related to stock option and restricted stock plans, net of taxes and adjustments			$ 14,508,703	$ 22,933,287
Stock Options Plans
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Compensation related to stock option and restricted stock plans, net of taxes and adjustments	$ 854,647	$ 1,168,033	$ 2,987,621	4,394,143
Restricted Stock
Summary of the status and changes in restricted stock [Roll Forward]
Outstanding at Beginning of Year (in shares)			705,254
Awards granted (in shares)			39,675
Vested during the period, net of cancellations (in shares)			(83,250)
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited			(60,000)
Outstanding at End of Period (in shares)	601,679		601,679
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at beginning period (in dollars per share)			$ 101.47
Grant date fair value (in dollars per share)			96.14
Vested during the period, net of cancellations (in dollars per share)			101.17
Cancelled during the period (in dollars per share)			100.79
Outstanding at ending period (in dollars per share)	$ 101.23		$ 101.23
Compensation related to stock option and restricted stock plans, net of taxes and adjustments	$ 4,043,813	5,162,777	$ 11,521,082	18,539,144
Equity Securities
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Compensation related to stock option and restricted stock plans, net of taxes and adjustments	$ 4,898,460	$ 6,330,810	$ 14,508,703	$ 22,933,287