Segment Reporting - Net Sales by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 532,721	$ 471,225	$ 1,691,303	$ 1,417,561
Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	100.00%	100.00%	100.00%	100.00%
Server systems
Segment Reporting Information [Line Items]
Net sales	$ 372,404	$ 301,953	$ 1,182,362	$ 859,818
Server systems | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	69.90%	64.10%	69.90%	60.70%
Subsystems and accessories
Segment Reporting Information [Line Items]
Net sales	$ 160,317	$ 169,272	$ 508,941	$ 557,743
Subsystems and accessories | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	30.10%	35.90%	30.10%	39.30%