Earnings Per Share (Tables)

9 Months Ended

Apr. 30, 2016

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,
	2016		2015		2016		2015
	(in thousands)
Basic weighted-average number of shares		22,635		23,034		22,790		22,867
Effect of dilutive securities:
Stock options		—		20		—		33
Non-vested restricted Class B common stock		45		414		26		359
Diluted weighted-average number of shares		22,680		23,468		22,816		23,259

Shares excluded from the diluted earnings per share computations

	Three Months Ended April 30,				Nine Months Ended April 30,
	2016		2015		2016		2015
	(in thousands)
Shares excluded from the calculation of diluted earnings per share		264		15		265		166