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Stock-Based Compensation (Tables)
6 Months Ended
Sep. 30, 2015
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 and RSU granted under the above plans was estimated on the date of grant using either a Black-Scholes option pricing model (service-based awards) or a Monte Carlo simulation model (market-based awards) with the following average assumptions:
 
Stock Options
 
RSUs
 
Six Months Ended September 30,
 
Six Months Ended September 30,
 
2015
 
2014
 
2015
 
2014
Risk-free interest rate
1.96
%
 
1.44
%
 
1.29
%
 
1.17
%
Volatility
36.90
%
 
50.10
%
 
36.86
%
 
38.72
%
Dividend yield
2.59
%
 
2.38
%
 
2.60
%
 
2.38
%
Expected life of option (in years)
4.75

 
4.75