Segment Reporting - Revenue by Product Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Segment Reporting Information [Line Items]
Net sales	$ 275,896	$ 240,178	$ 249,915	$ 247,885	$ 260,303	$ 234,288	$ 240,813	$ 207,178	$ 1,013,874	$ 942,582	$ 721,438
Percent of Net Sales	100.00%				100.00%				100.00%	100.00%	100.00%
Server systems [Member]
Segment Reporting Information [Line Items]
Net sales									447,000	351,282	245,209
Percent of Net Sales	44.10%				37.30%				44.10%	37.30%	34.00%
Subsystems and accessories [Member]
Segment Reporting Information [Line Items]
Net sales									$ 566,874	$ 591,300	$ 476,229
Percent of Net Sales	55.90%				62.70%				55.90%	62.70%	66.00%