Consolidated Quarterly Statements of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011		Jun. 30, 2010
Net revenues	$ 244,929	$ 228,710		$ 199,830
Gross margin	136,156	129,899		112,532
Income from operations	30,112	24,985		17,313
Income from operations before income taxes	31,771	26,567		18,692
Income tax expense	9,152	8,060		(9,377)
Income from continuing operations	22,619	18,507		28,069
Net income	22,619	18,442		28,358
Basic net earnings per share:
Income from continuing operations	$ 0.77	$ 0.73		$ 1.25
Net income	$ 0.77	$ 0.73		$ 1.26
Diluted net earnings per share:
Income from continuing operations	$ 0.75	$ 0.71		$ 1.22
Net income	$ 0.75	$ 0.70		$ 1.23
1st Quarter
Net revenues	49,122	52,108
Gross margin	29,916	30,660
Income from operations	3,565	5,245
Income from operations before income taxes	3,967	5,759
Income tax expense	1,314	2,077
Income from continuing operations	2,653	3,682
Net income	2,653	3,630
Basic net earnings per share:
Income from continuing operations	$ 0.09	$ 0.16
Net income	$ 0.09	$ 0.16
Diluted net earnings per share:
Income from continuing operations	$ 0.09	$ 0.16	[1]
Net income	$ 0.09	$ 0.15	[1]
2nd Quarter
Net revenues	67,959	55,513
Gross margin	40,913	31,640
Income from operations	13,485	6,518
Income from operations before income taxes	13,873	6,879
Income tax expense	4,828	1,696
Income from continuing operations	9,045	5,183
Net income	9,045	5,183
Basic net earnings per share:
Income from continuing operations	$ 0.31	$ 0.22
Net income	$ 0.31	$ 0.22
Diluted net earnings per share:
Income from continuing operations	$ 0.30	$ 0.22	[1]
Net income	$ 0.30	$ 0.22	[1]
3rd Quarter
Net revenues	66,989	59,855
Gross margin	35,063	32,882
Income from operations	7,106	6,999
Income from operations before income taxes	7,625	7,385
Income tax expense	2,380	2,007
Income from continuing operations	5,245	5,378
Net income	5,245	5,378
Basic net earnings per share:
Income from continuing operations	$ 0.18	$ 0.20
Net income	$ 0.18	$ 0.20
Diluted net earnings per share:
Income from continuing operations	$ 0.17	$ 0.20	[1]
Net income	$ 0.17	$ 0.20	[1]
4th Quarter
Net revenues	60,859	61,234
Gross margin	30,264	34,717
Income from operations	5,956	6,223
Income from operations before income taxes	6,306	6,544
Income tax expense	630	2,280
Income from continuing operations	5,676	4,264
Net income	$ 5,676	$ 4,251
Basic net earnings per share:
Income from continuing operations	$ 0.19	$ 0.15
Net income	$ 0.19	$ 0.15
Diluted net earnings per share:
Income from continuing operations	$ 0.19	$ 0.14	[1]
Net income	$ 0.19	$ 0.14	[1]

[1] Due to the effects of rounding, the sum of the four quarters does not equal the annual total.