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STOCK-BASED COMPENSATION (Tables)
 6 Months Ended
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance Shares Vesting Based on EPS Targets The Performance Option performance target is set forth below.
Trailing 4-Quarter EPS Targets for
September 30, 2018 through March 31, 2025		Options Eligible for Vesting
(Percentage of Award)
$25.30100%
Fair Value was Estimated at Grant Date Using the Weighted-Average Fair value was estimated at grant date using the weighted-average assumptions listed below:
Three months ended September 30,Six months ended September 30,
2021202020212020
Dividend Yield—%—%—%—%
Expected Volatility57.86%56.19%58.35%56.17%
Average risk-free rate0.83%0.35%0.89%0.36%
Expected Life6.1 years6.2 years6.1 years6.2 years
Summary Schedule of Stock Option Activity
Option activity for the six months ended September 30, 2021 was as follows:
 SharesWeighted Average Exercise
Price		Weighted Average
Remaining
Contractual Term		Aggregate Intrinsic Value
Options outstanding, beginning of period500,168 $93.89   
Granted during period17,899 180.33   
Exercised during period(111,122)78.14   
Forfeited during period(7,750)100.79   
Expired during period— —   
Options outstanding, end of period399,195 $102.02 6.8 years$34,964,006 
Options exercisable, end of period103,323 $85.31 4.6 years$10,773,204 
Intrinsic Value of Options Exercised The total intrinsic value of options exercised during the periods ended September 30, 2021 and 2020 was as follows:
September 30,
2021		September 30,
2020
Three months ended$9,519,593 $496,721 
Six months ended$11,541,269 $496,721 
Summary of the Status and Changes Restricted Stock
A summary of the status of the Company’s restricted stock as of September 30, 2021, and changes during the six months ended September 30, 2021, are presented below:
 SharesWeighted Average Fair Value at Grant Date
Outstanding at March 31, 2021614,739 $101.99 
Granted during the period4,062 188.38 
Vested during the period(2,808)118.21 
Forfeited during the period— — 
Outstanding at September 30, 2021615,993 $102.49 
Share-Based Compensation Included as a Component of Net Income
Total stock-based compensation included as a component of net income during the three and six month periods ended September 30, 2021 and 2020 was as follows:
Three months ended September 30,Six months ended September 30,
2021202020212020
Stock-based compensation related to equity classified awards:
Stock-based compensation related to stock options$909,350 $1,086,239 $1,852,977 $2,132,974 
Stock-based compensation related to restricted stock, net of adjustments and exclusive of cancellations3,355,698 3,940,404 6,596,161 7,477,269 
Total stock-based compensation related to equity classified awards$4,265,048 $5,026,643 $8,449,138 $9,610,243 
Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance Shares Vesting Based on EPS Targets The Performance Share performance targets are set forth below.
Trailing 4-Quarter EPS Targets for
September 30, 2018 through March 31, 2025		Restricted Stock Eligible for Vesting
(Percentage of Award)
$16.3540%
$20.4560%