Earnings Per Share - Computation of Basic and Diluted EPS (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Numerator:
Net income	$ 7,894	$ 4,418
Denominator:
Weighted-average common shares outstanding	23,679	23,355
Net common stock equivalents assuming the exercise of in-the-money stock options	119	182
Weighted-average common and common equivalent shares outstanding, assuming dilution	23,798	23,537
Earnings Per Share:
Basic	$ 0.33	$ 0.19
Diluted	$ 0.33	$ 0.19