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STOCK-BASED COMPENSATION (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Document Fiscal Year Focus     2020  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 643,961 701,484 660,872 552,337
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00% 0.00% 0.00% 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 52.87% 48.95% 52.09% 48.95%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.64% 3.06% 1.66% 3.06%
Stock Option Plans [Abstract]        
Number of shares available for grant (in shares) 193,070   193,070  
Weighted-average fair value at the grant date $ 60.43 $ 53.13 $ 64.49 $ 53.12
Options Activity [Roll Forward]        
Exercised (in shares) (13,709) (20,180) (69,181) (45,456)
Restricted Stock [Abstract]        
Grant date fair value (in dollars per share)     $ 101.61 $ 107.52
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Grant date fair value (in dollars per share)     $ 101.61 $ 107.52
Compensation related to stock option and restricted stock plans     $ 22,933,287 $ 9,905,103
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 6 years 8 months 12 days 6 years 2 months 12 days 6 years 8 months 12 days
Stock Options Plans [Member]        
Stock Option Plans [Abstract]        
Shares of authorized common stock reserved for issuance (in shares) 4,350,000   4,350,000  
Options Activity [Roll Forward]        
Options outstanding, beginning of year (in shares)     704,240  
Granted (in shares)     16,421  
Exercised (in shares)     (69,181)  
Forfeited (in shares)     (10,093)  
Expired (in shares)     (1,620)  
Options outstanding, end of period (in shares) 639,767   639,767  
Options exercisable, end of period (in shares) 320,479   320,479  
Weighted Average Exercise Price [Roll Forward]        
Options outstanding, beginning of year (in dollars per share)     $ 85.33  
Granted (in dollars per share)     126.15  
Exercised (in dollars per share)     66.35  
Forfeited (in dollars per share)     98.68  
Expired (in dollars per share)     30.89  
Options outstanding, end of period (in dollars per share) $ 88.36   88.36  
Options exercisable, end of period (in dollars per share) $ 74.84   $ 74.84  
Stock Option Activity Additional Disclosures [Abstract]        
Weighted-average remaining contractual term, Options outstanding, end of period     6 years 8 months 12 days  
Weighted-average remaining contractual terms, Options exercisable, end of period     4 years 7 months 6 days  
Aggregate intrinsic value, Options outstanding, end of period $ 4,285,681   $ 4,285,681  
Aggregate intrinsic value, Options exercisable, end of period 4,217,480   4,217,480  
Intrinsic value of options exercised 728,193 $ 1,159,858 5,078,750 $ 2,251,405
Compensation Cost Not yet Recognized [Abstract]        
Total unrecognized stock-based compensation expense related to non-vested stock options 11,700,000   $ 11,700,000  
Weighted average period for recognition     4 years 4 months 24 days  
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]        
Weighted average period for recognition     4 years 4 months 24 days  
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Compensation related to stock option and restricted stock plans 1,168,033 1,361,349 $ 4,394,143 $ 2,424,986
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock Issued During Period, Shares, Share-based Compensation, Gross     760,420 24,456
Restricted Stock [Abstract]        
Grant date fair value (in dollars per share)     $ 93.88  
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]        
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options $ 48,000,000.0   $ 48,000,000.0  
Summary of the status and changes in restricted stock [Roll Forward]        
Outstanding at Beginning of Year (in shares)     783,450  
Awards granted (in shares)     7,203  
Vested during the period, net of cancellations (in shares)     (89,419)  
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited     0  
Outstanding at End of Period (in shares) 701,234   701,234  
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Outstanding at March 31, 2012 (in dollars per share)     $ 100.66  
Grant date fair value (in dollars per share)     93.88  
Vested during the period, net of cancellations (in dollars per share)     92.93  
Cancelled during the period (in dollars per share)     0  
Outstanding at June 30, 2012 (in dollars per share) $ 101.57   $ 101.57  
Compensation related to stock option and restricted stock plans $ 5,162,777 5,565,768 $ 18,539,144 $ 7,480,117
Equity Securities [Member]        
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Compensation related to stock option and restricted stock plans $ 6,330,810 $ 6,927,117 $ 22,933,287 $ 9,905,103
Performance Shares [Member]        
Compensation Cost Not yet Recognized [Abstract]        
Weighted average period for recognition     3 years 8 months 12 days  
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]        
Weighted average period for recognition     3 years 8 months 12 days  
Maximum [Member] | Stock Options Plans [Member]        
Stock Option Plans [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years  
Vesting period     5 years  
Minimum [Member] | Stock Options Plans [Member]        
Stock Option Plans [Abstract]        
Vesting period     3 years