Earnings Per Share (Tables)

6 Months Ended

Jan. 31, 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 January 31,				Six Months Ended January 31,
	2016		2015		2016		2015
		(in thousands)
Basic weighted-average number of shares		22,799		22,818		22,867		22,783
Effect of dilutive securities:
Stock options		—		52		—		40
Non-vested restricted Class B common stock		—		355		17		332
Diluted weighted-average number of shares		22,799		23,225		22,884		23,155

Shares excluded from the diluted earnings per share computations

	Three Months Ended January 31,				Six Months Ended January 31,
	2016		2015		2016		2015
		(in thousands)
Shares excluded from the calculation of diluted earnings per share		265		16		266		42