Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Earnings Per Share - Additional Information (Detail)

v3.2.0.727
Basic and Diluted Earnings Per Share - Additional Information (Detail)
shares in Millions
3 Months Ended
Jul. 31, 2015
shares
Restricted Stock  
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Anti-dilutive securities excluded from computation of earnings per share, shares 0.5