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Share-based Payments (Tables)
 9 Months Ended
Dec. 31, 2017
Share-based Payments [Abstract]  
Summary of Black-Scholes option pricing model assumptions used to derive weighted average fair value of stock options granted
The following assumptions were used to derive the weighted average fair value of the stock options granted:

  
Nine Months Ended
December 31,
 
  
2017
  
2016
 
Weighted average risk free interest rate
  
1.91
%
  
1.38
%
Weighted average expected holding period (years)
  
5.82
   
5.84
 
Weighted average expected volatility
  
47.31
%
  
47.42
%
Weighted average expected dividend yield
  
-
   
-
 
Weighted average fair value of options granted
 
$
12.66
  
$
13.07
 
Summary of stock option transactions
The following is a summary of stock option transactions:

  
Number of
Shares
  
Weighted Average
Exercise Price
 
Outstanding at March 31, 2017
  
1,036,359
  
$
14.92
 
Granted
  
169,000
  
$
27.32
 
Exercised
  
(28,951
)
 
$
10.15
 
Forfeited
  
(5,967
)
 
$
28.55
 
Outstanding at December 31, 2017
  
1,170,441
  
$
16.76
 
 
Schedule of restricted stock units activity
The following is a summary of non-vested RSUs:

  
Number of Shares
  
Weighted Average
Grant Date Fair
Value
 
Non-vested at March 31, 2017
  
126,277
  
$
28.26
 
Granted
  
77,854
  
$
27.70
 
Vested
  
(63,868
)
 
$
27.21
 
Forfeited
  
(1,434
)
 
$
28.37
 
Non-vested at December 31, 2017
  
138,829
  
$
28.43