Earnings Per Share (Tables)

9 Months Ended

Apr. 30, 2014

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,
	2014		2013		2014		2013
	(in thousands)
Basic weighted-average number of shares		22,680		20,905		21,763		20,847
Effect of dilutive securities:
Stock options		105		—		108		—
Non-vested restricted Class B common stock		238		1,455		1,022		1,331
Diluted weighted-average number of shares		23,023		22,360		22,893		22,178

Shares Excluded from the Diluted Earnings Per Share Computations

	Three Months Ended April 30,				Nine Months Ended April 30,
	2014		2013		2014		2013
	(in thousands)
Shares excluded from the calculation of diluted earnings per share		98		703		61		703