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Share-Based Compensation (Tables)
6 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Fair Value of Each Stock Option Granted Using Monte Carlo Simulation Model
The fair value of each stock option granted under the above plan was estimated on the date of grant using a Black-Scholes option pricing model with the following average assumptions:
 
Six Months Ended September 30,
 
2017
 
2016
Risk-free interest rate
2.21
%
 
1.66
%
Volatility
34.45
%
 
35.12
%
Dividend yield
2.90
%
 
2.91
%
Expected life of option (in years)
6.25

 
4.75