Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales (including related party sales of $4,413 and $6,067 in the three months ended March 31, 2016 and 2015, respectively, and $12,125 and $43,524 in the nine months ended March 31, 2016 and 2015, respectively)	$ 532,721	$ 471,225	$ 1,691,303	$ 1,417,561
Cost of sales (including related party purchases of $55,133 and $58,002 in the three months ended March 31, 2016 and 2015, respectively, and $185,845 and $169,918 in the nine months ended March 31, 2016 and 2015, respectively)	453,569	394,405	1,433,574	1,187,096
Gross profit	79,152	76,820	257,729	230,465
Operating expenses:
Research and development	31,256	25,542	89,846	72,516
Sales and marketing	14,467	12,496	45,177	34,656
General and administrative	8,984	7,334	27,695	17,334
Total operating expenses	54,707	45,372	162,718	124,506
Income from operations	24,445	31,448	95,011	105,959
Interest and other income, net	20	21	131	92
Interest expense	(417)	(277)	(1,141)	(656)
Income before income tax provision	24,048	31,192	94,001	105,395
Income tax provision	7,386	8,136	28,951	30,234
Net income	$ 16,662	$ 23,056	$ 65,050	$ 75,161
Net income per common share:
Basic (in dollars per share)	$ 0.35	$ 0.49	$ 1.36	$ 1.63
Diluted (in dollars per share)	$ 0.32	$ 0.44	$ 1.26	$ 1.47
Weighted-average shares used in calculation of net income per common share:
Basic (in shares)	48,047	46,824	47,737	46,138
Diluted (in shares)	52,238	52,008	51,637	51,102