Earnings Per Share (Tables)

6 Months Ended

Jan. 31, 2013

Earnings Per Share [Abstract]

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,
	2013		2012		2013		2012
	(in thousands)
Basic weighted-average number of shares		20,829		20,492		20,818		20,429
Effect of dilutive securities:
Non-vested restricted Class B common stock		1,260		1,319		1,269		—
Diluted weighted-average number of shares		22,089		21,811		22,087		20,429

Shares excluded from the diluted earnings per share computations

	Three Months Ended January 31,				Six Months Ended January 31,
	2013		2012		2013		2012
	(in thousands)
Stock options		704		601		704		678
Non-vested restricted Class B common stock		—		—		—		1,761
Shares excluded from the calculation of diluted earnings per share		704		601		704		2,439