Segment Reporting - Net Sales by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 638,964	$ 503,014	$ 1,158,582	$ 946,336
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	$ 453,747	$ 302,256	$ 809,958	$ 557,865
Server systems | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	71.00%	60.10%	69.90%	58.90%
Subsystems and accessories
Segment Reporting Information [Line Items]
Net sales	$ 185,217	$ 200,758	$ 348,624	$ 388,471
Subsystems and accessories | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	29.00%	39.90%	30.10%	41.10%