Earnings Per Share (Tables)

3 Months Ended

Oct. 31, 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 October 31,
	2015		2014
	(in thousands)
Basic weighted-average number of shares		22,935		22,755
Effect of dilutive securities:
Stock options		—		27
Non-vested restricted Class B common stock		34		309
Diluted weighted-average number of shares		22,969		23,091

Shares excluded from the diluted earnings per share computations

	Three Months Ended October 31,
	2015		2014
	(in thousands)
Shares excluded from the calculation of diluted earnings per share		267		466