Earnings Per Share (Tables)

9 Months Ended

Apr. 30, 2015

Earnings Per Share [Abstract]

Summary of Weighted-Average Number of Shares Used in the Calculation of Basic and Diluted Earnings Per Share

	Three Months Ended April 30,				Nine Months Ended April 30,
	2015		2014		2015		2014
	(in thousands)
Basic weighted-average number of shares		23,034		22,680		22,867		21,763
Effect of dilutive securities:
Stock options		20		105		33		108
Non-vested restricted Class B common stock		414		238		359		1,022
Diluted weighted-average number of shares		23,468		23,023		23,259		22,893

Shares Excluded from the Diluted Earnings Per Share Computations

	Three Months Ended April 30,				Nine Months Ended April 30,
	2015		2014		2015		2014
	(in thousands)
Stock options excluded from the calculation of diluted earnings per share		15		98		166		61