Earnings Per Share (Tables)

3 Months Ended

Oct. 31, 2013

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,
	2013		2012
	(in thousands)
Basic weighted-average number of shares		21,038		20,807
Effect of dilutive securities:
Stock options		87		—
Non-vested restricted Class B common stock		1,787		1,277
Diluted weighted-average number of shares		22,912		22,084

Shares excluded from the Diluted Earnings per Share Computations

	Three Months Ended October 31,
	2013		2012
	(in thousands)
Shares excluded from the calculation of diluted earnings per share		69		704