Segment, Geographic and Product Information - Company's Revenues by Product Groups (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,506,087	$ 2,043,958	$ 1,869,654
Storage products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,994,397	1,487,069	1,302,104
Networking products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	407,193	453,652	473,275
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 104,497	$ 103,237	$ 94,275