Earnings Per Share (Tables)

3 Months Ended

Oct. 31, 2012

Earnings Per Share [Abstract]

Schedule of numerators and denominators used in basic and diluted EPS calculations

	Three months ended October 31,
	2012		2011
Numerator:
Net income for basic calculation	$	7,435,000	12,601,000
Effect of dilutive securities:
Interest expense (net of tax) on 3.0% convertible senior notes	1,117,000		1,117,000
Numerator for diluted calculation	$	8,552,000	13,718,000
Denominator:
Denominator for basic calculation	17,379,000		23,257,000
Effect of dilutive securities:
Stock-based awards	159,000		198,000
Conversion of 3.0% convertible senior notes	5,906,000		5,692,000
Denominator for diluted calculation	23,444,000		29,147,000