Earnings Per Share (Tables)

6 Months Ended

Jan. 31, 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 January 31,				Six Months Ended January 31,
	2014		2013		2014		2013
	(in thousands)
Basic weighted-average number of shares		21,572		20,829		21,305		20,818
Effect of dilutive securities:
Stock options		132		—		109		—
Non-vested restricted Class B common stock		1,039		1,260		1,413		1,269
Diluted weighted-average number of shares		22,743		22,089		22,827		22,087

Shares excluded from the Diluted Earnings per Share Computations

	Three Months Ended January 31,				Six Months Ended January 31,
	2014		2013		2014		2013
	(in thousands)
Shares excluded from the calculation of diluted earnings per share		16		704		42		704