Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net sales (including related party sales of $33,821, $29,110 and $47,684 in fiscal years 2017, 2016 and 2015, respectively)	$ 678,168	$ 614,798	$ 663,200	$ 528,763	$ 531,215	$ 513,468	$ 641,235	$ 539,104	$ 2,484,929	$ 2,225,022	$ 1,954,353
Cost of sales (including related party purchases of $236,062, $242,638 and $227,661 in fiscal years 2017, 2016 and 2015, respectively)									2,134,971	1,894,521	1,647,769
Gross profit	85,933	85,337	96,136	82,552	70,856	78,983	103,187	77,475	349,958	330,501	306,584
Operating expenses:
Research and development									143,992	124,223	101,402
Sales and marketing									66,445	58,338	47,496
General and administrative									44,646	40,449	25,040
Total operating expenses									255,083	223,010	173,938
Income from operations									94,875	107,491	132,646
Other income (expense), net									(1,287)	1,507	956
Interest expense									(2,300)	(1,594)	(965)
Income before income tax provision									91,288	107,404	132,637
Income tax provision									24,434	35,323	40,082
Net income	$ 13,255	$ 15,350	$ 22,876	$ 15,373	$ 5,480	$ 16,046	$ 33,204	$ 17,351	$ 66,854	$ 72,081	$ 92,555
Net income per common share:
Basic (in dollars per share)	$ 0.26	$ 0.32	$ 0.48	$ 0.32	$ 0.10	$ 0.33	$ 0.70	$ 0.37	$ 1.38	$ 1.50	$ 1.99
Diluted (in dollars per share)	$ 0.25	$ 0.30	$ 0.44	$ 0.30	$ 0.10	$ 0.31	$ 0.64	$ 0.34	$ 1.29	$ 1.39	$ 1.85
Weighted-average shares used in calculation of net income per common share:
Basic (in shares)									48,383	47,917	46,434
Diluted (in shares)									51,679	51,836	50,094