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Benefit Plans (Tables)
 12 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of weighted-average assumptions This fair value was estimated at grant date using the weighted-average assumptions listed below.
 202020192018
Dividend yield0 %0 %0 %
Expected volatility52.28 %48.94 %52.97 %
Average risk-free interest rate1.58 %3.01 %1.98 %
Expected life6.3 years6.7 years5.0 years
Summary schedule of stock option activity
Option activity for the year ended March 31, 2020 was as follows:
 SharesWeighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual Term		Aggregate
Intrinsic
Value
Options outstanding, beginning of year704,240  $85.33    
Granted24,171  112.54    
Exercised(69,481) 66.39    
Forfeited(10,432) 99.43    
Expired(1,770) 34.75    
Options outstanding, end of period646,728  $88.30  6.50$551,175  
Options exercisable, end of period323,729  $75.20  4.41$549,716  
Intrinsic value of options exercised The total intrinsic value of options exercised during the periods ended March 31, 2020, 2019, and 2018 was as follows:
202020192018
$5,083,094$4,433,495$12,336,156
Summary of the status and changes restricted stock
A summary of the status of the Company’s restricted stock as of March 31, 2020 and changes during the year ended March 31, 2020, are presented below:
 SharesWeighted Average Fair
Value at Grant Date
Outstanding at March 31, 2019783,450  $100.66  
Granted during the period11,223  90.23  
Vested during the period(89,419) 92.93  
Forfeited during the period—  —  
Outstanding at March 31, 2020705,254  $101.47  
Share-based compensation included as a component of net income
Total stock-based compensation included as a component of net income during the years ended March 31, 2020, 2019, and 2018 was as follows:
 202020192018
Stock-based compensation related to equity classified units: 
Stock-based compensation related to stock options$5,522,883  3,991,967  2,353,214  
Stock-based compensation related to restricted stock23,429,277  13,643,343  3,081,405  
Total stock-based compensation related to equity classified awards$28,952,160  17,635,310  5,434,619