Accounting for Stock-Based Compensation (Tables)

3 Months Ended

Aug. 31, 2015

Accounting for Stock-Based Compensation

Schedule of assumptions used in the Black-Scholes option pricing model to estimate the fair value of each stock option grant

Risk-free interest rate	1.6	%
Expected volatility of common stock	36.1	%
Dividend yield	1.1	%
Expected option term in years	4.2