Segment Reporting - Segment Reporting of Net Sales by Product Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014 Customer
Segment Reporting Information [Line Items]
Net sales	$ 503,014	$ 356,362	$ 946,336	$ 665,378
Net Sales [Member]
Segment Reporting Information [Line Items]
Percent of net sales	100.00%	100.00%	100.00%	100.00%
Net Sales [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percent of net sales	15.10%		11.90%
Concentration, number of customers	1	0	1	0
Net Sales [Member] | Geographic Concentration Risk [Member] | International [Member]
Segment Reporting Information [Line Items]
Concentration, International countries		0	0	0
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percent of net sales			22.10%
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration, number of customers			1		0
Server systems [Member]
Segment Reporting Information [Line Items]
Net sales	302,256	174,072	557,865	317,355
Server systems [Member] | Net Sales [Member]
Segment Reporting Information [Line Items]
Percent of net sales	60.10%	48.80%	58.90%	47.70%
Subsystems and accessories [Member]
Segment Reporting Information [Line Items]
Net sales	$ 200,758	$ 182,290	$ 388,471	$ 348,023
Subsystems and accessories [Member] | Net Sales [Member]
Segment Reporting Information [Line Items]
Percent of net sales	39.90%	51.20%	41.10%	52.30%