Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales (including related party sales of $4,069 and $4,413 in the three months ended March 31, 2017 and 2016, respectively, and $14,414 and $12,125 in the nine months ended March 31, 2017 and 2016, respectively)	$ 631,124	$ 532,721	$ 1,812,046	$ 1,691,303
Cost of sales (including related party purchases of $62,378 and $55,133 in the three months ended March 31, 2017 and 2016, respectively, and $177,513 and $185,845 in the nine months ended March 31, 2017 and 2016, respectively)	542,798	453,569	1,550,278	1,433,574
Gross profit	88,326	79,152	261,768	257,729
Operating expenses:
Research and development	35,870	31,256	103,094	89,846
Sales and marketing	17,167	14,467	51,236	45,177
General and administrative	12,874	8,984	33,058	27,695
Total operating expenses	65,911	54,707	187,388	162,718
Income from operations	22,415	24,445	74,380	95,011
Interest and other income (expense), net	(51)	20	23	131
Interest expense	(558)	(417)	(1,385)	(1,141)
Income before income tax provision	21,806	24,048	73,018	94,001
Income tax provision	5,140	7,386	20,824	28,951
Net income	$ 16,666	$ 16,662	$ 52,194	$ 65,050
Net income per common share:
Basic (in dollars per share)	$ 0.34	$ 0.35	$ 1.08	$ 1.36
Diluted (in dollars per share)	$ 0.32	$ 0.32	$ 1.01	$ 1.26
Weighted-average shares used in calculation of net income per common share:
Basic (in shares)	48,445	48,047	48,243	47,737
Diluted (in shares)	51,918	52,238	51,579	51,637