Segment Reporting - Net Sales by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Net sales	$ 528,968	$ 519,618
Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	100.00%	100.00%
Server systems
Segment Reporting Information [Line Items]
Net sales	$ 357,493	$ 356,211
Server systems | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	67.60%	68.60%
Subsystems and accessories
Segment Reporting Information [Line Items]
Net sales	$ 171,475	$ 163,407
Subsystems and accessories | Product concentration risk | Net sales
Segment Reporting Information [Line Items]
Percent of Net Sales	32.40%	31.40%